^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) #include <dirent.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) #include <errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) #include <stdlib.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) #include <stdio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/capability.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/mman.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/time64.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <sys/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <sys/stat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <sys/param.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <fcntl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <unistd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <inttypes.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include "annotate.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include "build-id.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include "cap.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include "dso.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include "util.h" // lsdir()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include "debug.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include "event.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include "machine.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include "map.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include "symbol.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include "map_symbol.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include "mem-events.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include "symsrc.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include "strlist.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include "intlist.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include "namespaces.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #include "header.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #include "path.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #include <linux/ctype.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #include <linux/zalloc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #include <elf.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #include <limits.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #include <symbol/kallsyms.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #include <sys/utsname.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) static int dso__load_kernel_sym(struct dso *dso, struct map *map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) static bool symbol__is_idle(const char *name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) int vmlinux_path__nr_entries;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) char **vmlinux_path;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) struct symbol_conf symbol_conf = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) .nanosecs = false,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) .use_modules = true,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) .try_vmlinux_path = true,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) .demangle = true,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) .demangle_kernel = false,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) .cumulate_callchain = true,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) .time_quantum = 100 * NSEC_PER_MSEC, /* 100ms */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) .show_hist_headers = true,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) .symfs = "",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) .event_group = true,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) .inline_name = true,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) .res_sample = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) static enum dso_binary_type binary_type_symtab[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) DSO_BINARY_TYPE__KALLSYMS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) DSO_BINARY_TYPE__GUEST_KALLSYMS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) DSO_BINARY_TYPE__JAVA_JIT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) DSO_BINARY_TYPE__DEBUGLINK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) DSO_BINARY_TYPE__BUILD_ID_CACHE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) DSO_BINARY_TYPE__FEDORA_DEBUGINFO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) DSO_BINARY_TYPE__UBUNTU_DEBUGINFO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) DSO_BINARY_TYPE__BUILDID_DEBUGINFO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) DSO_BINARY_TYPE__SYSTEM_PATH_DSO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) DSO_BINARY_TYPE__GUEST_KMODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) DSO_BINARY_TYPE__GUEST_KMODULE_COMP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) DSO_BINARY_TYPE__MIXEDUP_UBUNTU_DEBUGINFO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) DSO_BINARY_TYPE__NOT_FOUND,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) #define DSO_BINARY_TYPE__SYMTAB_CNT ARRAY_SIZE(binary_type_symtab)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) static bool symbol_type__filter(char symbol_type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) symbol_type = toupper(symbol_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) return symbol_type == 'T' || symbol_type == 'W' || symbol_type == 'D' || symbol_type == 'B';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) static int prefix_underscores_count(const char *str)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) const char *tail = str;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) while (*tail == '_')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) tail++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) return tail - str;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) void __weak arch__symbols__fixup_end(struct symbol *p, struct symbol *c)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) p->end = c->start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) const char * __weak arch__normalize_symbol_name(const char *name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) return name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) int __weak arch__compare_symbol_names(const char *namea, const char *nameb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) return strcmp(namea, nameb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) int __weak arch__compare_symbol_names_n(const char *namea, const char *nameb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) unsigned int n)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) return strncmp(namea, nameb, n);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) int __weak arch__choose_best_symbol(struct symbol *syma,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) struct symbol *symb __maybe_unused)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) /* Avoid "SyS" kernel syscall aliases */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) if (strlen(syma->name) >= 3 && !strncmp(syma->name, "SyS", 3))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) return SYMBOL_B;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) if (strlen(syma->name) >= 10 && !strncmp(syma->name, "compat_SyS", 10))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) return SYMBOL_B;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) return SYMBOL_A;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) static int choose_best_symbol(struct symbol *syma, struct symbol *symb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) s64 a;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) s64 b;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) size_t na, nb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) /* Prefer a symbol with non zero length */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) a = syma->end - syma->start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) b = symb->end - symb->start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) if ((b == 0) && (a > 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) return SYMBOL_A;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) else if ((a == 0) && (b > 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) return SYMBOL_B;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) /* Prefer a non weak symbol over a weak one */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) a = syma->binding == STB_WEAK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) b = symb->binding == STB_WEAK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) if (b && !a)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) return SYMBOL_A;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) if (a && !b)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) return SYMBOL_B;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) /* Prefer a global symbol over a non global one */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) a = syma->binding == STB_GLOBAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) b = symb->binding == STB_GLOBAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) if (a && !b)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) return SYMBOL_A;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) if (b && !a)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) return SYMBOL_B;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) /* Prefer a symbol with less underscores */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) a = prefix_underscores_count(syma->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) b = prefix_underscores_count(symb->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) if (b > a)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) return SYMBOL_A;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) else if (a > b)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) return SYMBOL_B;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) /* Choose the symbol with the longest name */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) na = strlen(syma->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) nb = strlen(symb->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) if (na > nb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) return SYMBOL_A;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) else if (na < nb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) return SYMBOL_B;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) return arch__choose_best_symbol(syma, symb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) void symbols__fixup_duplicate(struct rb_root_cached *symbols)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) struct rb_node *nd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) struct symbol *curr, *next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) if (symbol_conf.allow_aliases)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) nd = rb_first_cached(symbols);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) while (nd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) curr = rb_entry(nd, struct symbol, rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) again:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) nd = rb_next(&curr->rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) next = rb_entry(nd, struct symbol, rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) if (!nd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) if (curr->start != next->start)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) if (choose_best_symbol(curr, next) == SYMBOL_A) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) rb_erase_cached(&next->rb_node, symbols);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) symbol__delete(next);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) goto again;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) nd = rb_next(&curr->rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) rb_erase_cached(&curr->rb_node, symbols);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) symbol__delete(curr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) void symbols__fixup_end(struct rb_root_cached *symbols)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) struct rb_node *nd, *prevnd = rb_first_cached(symbols);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) struct symbol *curr, *prev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) if (prevnd == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) curr = rb_entry(prevnd, struct symbol, rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) for (nd = rb_next(prevnd); nd; nd = rb_next(nd)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) prev = curr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) curr = rb_entry(nd, struct symbol, rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) if (prev->end == prev->start || prev->end != curr->start)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) arch__symbols__fixup_end(prev, curr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) /* Last entry */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) if (curr->end == curr->start)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) curr->end = roundup(curr->start, 4096) + 4096;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) void maps__fixup_end(struct maps *maps)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) struct map *prev = NULL, *curr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) down_write(&maps->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) maps__for_each_entry(maps, curr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) if (prev != NULL && !prev->end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) prev->end = curr->start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) prev = curr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) * We still haven't the actual symbols, so guess the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) * last map final address.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) if (curr && !curr->end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) curr->end = ~0ULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) up_write(&maps->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) struct symbol *symbol__new(u64 start, u64 len, u8 binding, u8 type, const char *name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) size_t namelen = strlen(name) + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) struct symbol *sym = calloc(1, (symbol_conf.priv_size +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) sizeof(*sym) + namelen));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) if (sym == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) if (symbol_conf.priv_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) if (symbol_conf.init_annotation) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) struct annotation *notes = (void *)sym;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) pthread_mutex_init(¬es->lock, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) sym = ((void *)sym) + symbol_conf.priv_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) sym->start = start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) sym->end = len ? start + len : start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) sym->type = type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) sym->binding = binding;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) sym->namelen = namelen - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) pr_debug4("%s: %s %#" PRIx64 "-%#" PRIx64 "\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) __func__, name, start, sym->end);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) memcpy(sym->name, name, namelen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) return sym;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) void symbol__delete(struct symbol *sym)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) free(((void *)sym) - symbol_conf.priv_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) void symbols__delete(struct rb_root_cached *symbols)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) struct symbol *pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) struct rb_node *next = rb_first_cached(symbols);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) while (next) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) pos = rb_entry(next, struct symbol, rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) next = rb_next(&pos->rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) rb_erase_cached(&pos->rb_node, symbols);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) symbol__delete(pos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) void __symbols__insert(struct rb_root_cached *symbols,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) struct symbol *sym, bool kernel)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) struct rb_node **p = &symbols->rb_root.rb_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) struct rb_node *parent = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) const u64 ip = sym->start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) struct symbol *s;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) bool leftmost = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) if (kernel) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) const char *name = sym->name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) * ppc64 uses function descriptors and appends a '.' to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) * start of every instruction address. Remove it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) if (name[0] == '.')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) name++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) sym->idle = symbol__is_idle(name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) while (*p != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) parent = *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) s = rb_entry(parent, struct symbol, rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) if (ip < s->start)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) p = &(*p)->rb_left;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) p = &(*p)->rb_right;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) leftmost = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) rb_link_node(&sym->rb_node, parent, p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) rb_insert_color_cached(&sym->rb_node, symbols, leftmost);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) void symbols__insert(struct rb_root_cached *symbols, struct symbol *sym)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) __symbols__insert(symbols, sym, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) static struct symbol *symbols__find(struct rb_root_cached *symbols, u64 ip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) struct rb_node *n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) if (symbols == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) n = symbols->rb_root.rb_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) while (n) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) struct symbol *s = rb_entry(n, struct symbol, rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) if (ip < s->start)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) n = n->rb_left;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) else if (ip > s->end || (ip == s->end && ip != s->start))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) n = n->rb_right;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) return s;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) static struct symbol *symbols__first(struct rb_root_cached *symbols)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) struct rb_node *n = rb_first_cached(symbols);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) if (n)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) return rb_entry(n, struct symbol, rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) static struct symbol *symbols__last(struct rb_root_cached *symbols)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) struct rb_node *n = rb_last(&symbols->rb_root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) if (n)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) return rb_entry(n, struct symbol, rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) static struct symbol *symbols__next(struct symbol *sym)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) struct rb_node *n = rb_next(&sym->rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) if (n)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) return rb_entry(n, struct symbol, rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) static void symbols__insert_by_name(struct rb_root_cached *symbols, struct symbol *sym)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) struct rb_node **p = &symbols->rb_root.rb_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) struct rb_node *parent = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) struct symbol_name_rb_node *symn, *s;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) bool leftmost = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) symn = container_of(sym, struct symbol_name_rb_node, sym);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) while (*p != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) parent = *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) s = rb_entry(parent, struct symbol_name_rb_node, rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) if (strcmp(sym->name, s->sym.name) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) p = &(*p)->rb_left;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) p = &(*p)->rb_right;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) leftmost = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) rb_link_node(&symn->rb_node, parent, p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) rb_insert_color_cached(&symn->rb_node, symbols, leftmost);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) static void symbols__sort_by_name(struct rb_root_cached *symbols,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) struct rb_root_cached *source)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) struct rb_node *nd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) for (nd = rb_first_cached(source); nd; nd = rb_next(nd)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) struct symbol *pos = rb_entry(nd, struct symbol, rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) symbols__insert_by_name(symbols, pos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) int symbol__match_symbol_name(const char *name, const char *str,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) enum symbol_tag_include includes)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) const char *versioning;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) if (includes == SYMBOL_TAG_INCLUDE__DEFAULT_ONLY &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) (versioning = strstr(name, "@@"))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) int len = strlen(str);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) if (len < versioning - name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) len = versioning - name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) return arch__compare_symbol_names_n(name, str, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) return arch__compare_symbol_names(name, str);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) static struct symbol *symbols__find_by_name(struct rb_root_cached *symbols,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) const char *name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) enum symbol_tag_include includes)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) struct rb_node *n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) struct symbol_name_rb_node *s = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) if (symbols == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) n = symbols->rb_root.rb_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) while (n) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) int cmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) s = rb_entry(n, struct symbol_name_rb_node, rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) cmp = symbol__match_symbol_name(s->sym.name, name, includes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) if (cmp > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) n = n->rb_left;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) else if (cmp < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) n = n->rb_right;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) if (n == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) if (includes != SYMBOL_TAG_INCLUDE__DEFAULT_ONLY)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) /* return first symbol that has same name (if any) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) for (n = rb_prev(n); n; n = rb_prev(n)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) struct symbol_name_rb_node *tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) tmp = rb_entry(n, struct symbol_name_rb_node, rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) if (arch__compare_symbol_names(tmp->sym.name, s->sym.name))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) s = tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) return &s->sym;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) void dso__reset_find_symbol_cache(struct dso *dso)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) dso->last_find_result.addr = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) dso->last_find_result.symbol = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) void dso__insert_symbol(struct dso *dso, struct symbol *sym)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) __symbols__insert(&dso->symbols, sym, dso->kernel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) /* update the symbol cache if necessary */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) if (dso->last_find_result.addr >= sym->start &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) (dso->last_find_result.addr < sym->end ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) sym->start == sym->end)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) dso->last_find_result.symbol = sym;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) void dso__delete_symbol(struct dso *dso, struct symbol *sym)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) rb_erase_cached(&sym->rb_node, &dso->symbols);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) symbol__delete(sym);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) dso__reset_find_symbol_cache(dso);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) struct symbol *dso__find_symbol(struct dso *dso, u64 addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) if (dso->last_find_result.addr != addr || dso->last_find_result.symbol == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) dso->last_find_result.addr = addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) dso->last_find_result.symbol = symbols__find(&dso->symbols, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) return dso->last_find_result.symbol;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) struct symbol *dso__first_symbol(struct dso *dso)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) return symbols__first(&dso->symbols);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) struct symbol *dso__last_symbol(struct dso *dso)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) return symbols__last(&dso->symbols);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) struct symbol *dso__next_symbol(struct symbol *sym)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) return symbols__next(sym);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) struct symbol *symbol__next_by_name(struct symbol *sym)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) struct symbol_name_rb_node *s = container_of(sym, struct symbol_name_rb_node, sym);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) struct rb_node *n = rb_next(&s->rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) return n ? &rb_entry(n, struct symbol_name_rb_node, rb_node)->sym : NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) * Returns first symbol that matched with @name.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) struct symbol *dso__find_symbol_by_name(struct dso *dso, const char *name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) struct symbol *s = symbols__find_by_name(&dso->symbol_names, name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) SYMBOL_TAG_INCLUDE__NONE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) if (!s)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) s = symbols__find_by_name(&dso->symbol_names, name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) SYMBOL_TAG_INCLUDE__DEFAULT_ONLY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) return s;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) void dso__sort_by_name(struct dso *dso)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) dso__set_sorted_by_name(dso);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) return symbols__sort_by_name(&dso->symbol_names, &dso->symbols);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) * While we find nice hex chars, build a long_val.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) * Return number of chars processed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) static int hex2u64(const char *ptr, u64 *long_val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) char *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) *long_val = strtoull(ptr, &p, 16);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) return p - ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) int modules__parse(const char *filename, void *arg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) int (*process_module)(void *arg, const char *name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) u64 start, u64 size))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) char *line = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) size_t n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) FILE *file;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) file = fopen(filename, "r");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) if (file == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) while (1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) char name[PATH_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) u64 start, size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) char *sep, *endptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) ssize_t line_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) line_len = getline(&line, &n, file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) if (line_len < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) if (feof(file))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) err = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) if (!line) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) err = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) line[--line_len] = '\0'; /* \n */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) sep = strrchr(line, 'x');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) if (sep == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) hex2u64(sep + 1, &start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) sep = strchr(line, ' ');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) if (sep == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) *sep = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) scnprintf(name, sizeof(name), "[%s]", line);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) size = strtoul(sep + 1, &endptr, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) if (*endptr != ' ' && *endptr != '\t')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) err = process_module(arg, name, start, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) free(line);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) fclose(file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) * These are symbols in the kernel image, so make sure that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) * sym is from a kernel DSO.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) static bool symbol__is_idle(const char *name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) const char * const idle_symbols[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) "acpi_idle_do_entry",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) "acpi_processor_ffh_cstate_enter",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) "arch_cpu_idle",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) "cpu_idle",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) "cpu_startup_entry",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) "idle_cpu",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) "intel_idle",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) "default_idle",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) "native_safe_halt",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) "enter_idle",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) "exit_idle",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) "mwait_idle",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) "mwait_idle_with_hints",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) "mwait_idle_with_hints.constprop.0",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) "poll_idle",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) "ppc64_runlatch_off",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) "pseries_dedicated_idle_sleep",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) "psw_idle",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) "psw_idle_exit",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) static struct strlist *idle_symbols_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) if (idle_symbols_list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) return strlist__has_entry(idle_symbols_list, name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) idle_symbols_list = strlist__new(NULL, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) for (i = 0; idle_symbols[i]; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) strlist__add(idle_symbols_list, idle_symbols[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) return strlist__has_entry(idle_symbols_list, name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) static int map__process_kallsym_symbol(void *arg, const char *name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) char type, u64 start)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) struct symbol *sym;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) struct dso *dso = arg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) struct rb_root_cached *root = &dso->symbols;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) if (!symbol_type__filter(type))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) * module symbols are not sorted so we add all
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) * symbols, setting length to 0, and rely on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) * symbols__fixup_end() to fix it up.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) sym = symbol__new(start, 0, kallsyms2elf_binding(type), kallsyms2elf_type(type), name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) if (sym == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) * We will pass the symbols to the filter later, in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) * map__split_kallsyms, when we have split the maps per module
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) __symbols__insert(root, sym, !strchr(name, '['));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) * Loads the function entries in /proc/kallsyms into kernel_map->dso,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) * so that we can in the next step set the symbol ->end address and then
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) * call kernel_maps__split_kallsyms.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) static int dso__load_all_kallsyms(struct dso *dso, const char *filename)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) return kallsyms__parse(filename, dso, map__process_kallsym_symbol);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) static int maps__split_kallsyms_for_kcore(struct maps *kmaps, struct dso *dso)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) struct map *curr_map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) struct symbol *pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) int count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) struct rb_root_cached old_root = dso->symbols;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) struct rb_root_cached *root = &dso->symbols;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) struct rb_node *next = rb_first_cached(root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) if (!kmaps)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) *root = RB_ROOT_CACHED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) while (next) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) char *module;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) pos = rb_entry(next, struct symbol, rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) next = rb_next(&pos->rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) rb_erase_cached(&pos->rb_node, &old_root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) RB_CLEAR_NODE(&pos->rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) module = strchr(pos->name, '\t');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) if (module)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) *module = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) curr_map = maps__find(kmaps, pos->start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) if (!curr_map) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) symbol__delete(pos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) pos->start -= curr_map->start - curr_map->pgoff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) if (pos->end > curr_map->end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) pos->end = curr_map->end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) if (pos->end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) pos->end -= curr_map->start - curr_map->pgoff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) symbols__insert(&curr_map->dso->symbols, pos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) ++count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) /* Symbols have been adjusted */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) dso->adjust_symbols = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) * Split the symbols into maps, making sure there are no overlaps, i.e. the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) * kernel range is broken in several maps, named [kernel].N, as we don't have
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) * the original ELF section names vmlinux have.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) static int maps__split_kallsyms(struct maps *kmaps, struct dso *dso, u64 delta,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) struct map *initial_map)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) struct machine *machine;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) struct map *curr_map = initial_map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) struct symbol *pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) int count = 0, moved = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) struct rb_root_cached *root = &dso->symbols;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) struct rb_node *next = rb_first_cached(root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) int kernel_range = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) bool x86_64;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) if (!kmaps)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) machine = kmaps->machine;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) x86_64 = machine__is(machine, "x86_64");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) while (next) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) char *module;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) pos = rb_entry(next, struct symbol, rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) next = rb_next(&pos->rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) module = strchr(pos->name, '\t');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) if (module) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) if (!symbol_conf.use_modules)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) goto discard_symbol;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) *module++ = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) if (strcmp(curr_map->dso->short_name, module)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) if (curr_map != initial_map &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) dso->kernel == DSO_SPACE__KERNEL_GUEST &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) machine__is_default_guest(machine)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) * We assume all symbols of a module are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) * continuous in * kallsyms, so curr_map
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) * points to a module and all its
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) * symbols are in its kmap. Mark it as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) * loaded.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) dso__set_loaded(curr_map->dso);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) curr_map = maps__find_by_name(kmaps, module);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) if (curr_map == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) pr_debug("%s/proc/{kallsyms,modules} "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) "inconsistency while looking "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) "for \"%s\" module!\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) machine->root_dir, module);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) curr_map = initial_map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) goto discard_symbol;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) if (curr_map->dso->loaded &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) !machine__is_default_guest(machine))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) goto discard_symbol;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) * So that we look just like we get from .ko files,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) * i.e. not prelinked, relative to initial_map->start.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) pos->start = curr_map->map_ip(curr_map, pos->start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) pos->end = curr_map->map_ip(curr_map, pos->end);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) } else if (x86_64 && is_entry_trampoline(pos->name)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) * These symbols are not needed anymore since the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) * trampoline maps refer to the text section and it's
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) * symbols instead. Avoid having to deal with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) * relocations, and the assumption that the first symbol
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) * is the start of kernel text, by simply removing the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) * symbols at this point.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) goto discard_symbol;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) } else if (curr_map != initial_map) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) char dso_name[PATH_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) struct dso *ndso;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) if (delta) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) /* Kernel was relocated at boot time */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) pos->start -= delta;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) pos->end -= delta;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) if (count == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) curr_map = initial_map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) goto add_symbol;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) if (dso->kernel == DSO_SPACE__KERNEL_GUEST)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) snprintf(dso_name, sizeof(dso_name),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) "[guest.kernel].%d",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) kernel_range++);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) snprintf(dso_name, sizeof(dso_name),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) "[kernel].%d",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) kernel_range++);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) ndso = dso__new(dso_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) if (ndso == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) ndso->kernel = dso->kernel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) curr_map = map__new2(pos->start, ndso);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) if (curr_map == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) dso__put(ndso);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) curr_map->map_ip = curr_map->unmap_ip = identity__map_ip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) maps__insert(kmaps, curr_map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) ++kernel_range;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) } else if (delta) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) /* Kernel was relocated at boot time */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) pos->start -= delta;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) pos->end -= delta;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) add_symbol:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) if (curr_map != initial_map) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) rb_erase_cached(&pos->rb_node, root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) symbols__insert(&curr_map->dso->symbols, pos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) ++moved;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) ++count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) discard_symbol:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) rb_erase_cached(&pos->rb_node, root);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) symbol__delete(pos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) if (curr_map != initial_map &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) dso->kernel == DSO_SPACE__KERNEL_GUEST &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) machine__is_default_guest(kmaps->machine)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) dso__set_loaded(curr_map->dso);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) return count + moved;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) bool symbol__restricted_filename(const char *filename,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) const char *restricted_filename)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) bool restricted = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) if (symbol_conf.kptr_restrict) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) char *r = realpath(filename, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) if (r != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) restricted = strcmp(r, restricted_filename) == 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) free(r);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) return restricted;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) return restricted;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) struct module_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) struct rb_node rb_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) char *name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) u64 start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) static void add_module(struct module_info *mi, struct rb_root *modules)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) struct rb_node **p = &modules->rb_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) struct rb_node *parent = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) struct module_info *m;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) while (*p != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959) parent = *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) m = rb_entry(parent, struct module_info, rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961) if (strcmp(mi->name, m->name) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962) p = &(*p)->rb_left;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964) p = &(*p)->rb_right;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966) rb_link_node(&mi->rb_node, parent, p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967) rb_insert_color(&mi->rb_node, modules);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) static void delete_modules(struct rb_root *modules)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972) struct module_info *mi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973) struct rb_node *next = rb_first(modules);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) while (next) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) mi = rb_entry(next, struct module_info, rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) next = rb_next(&mi->rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978) rb_erase(&mi->rb_node, modules);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) zfree(&mi->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) free(mi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) static struct module_info *find_module(const char *name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) struct rb_root *modules)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) struct rb_node *n = modules->rb_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) while (n) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990) struct module_info *m;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991) int cmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993) m = rb_entry(n, struct module_info, rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994) cmp = strcmp(name, m->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995) if (cmp < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) n = n->rb_left;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997) else if (cmp > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) n = n->rb_right;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000) return m;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006) static int __read_proc_modules(void *arg, const char *name, u64 start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007) u64 size __maybe_unused)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009) struct rb_root *modules = arg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010) struct module_info *mi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012) mi = zalloc(sizeof(struct module_info));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) if (!mi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016) mi->name = strdup(name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017) mi->start = start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019) if (!mi->name) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020) free(mi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024) add_module(mi, modules);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029) static int read_proc_modules(const char *filename, struct rb_root *modules)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031) if (symbol__restricted_filename(filename, "/proc/modules"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034) if (modules__parse(filename, modules, __read_proc_modules)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035) delete_modules(modules);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042) int compare_proc_modules(const char *from, const char *to)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044) struct rb_root from_modules = RB_ROOT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045) struct rb_root to_modules = RB_ROOT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046) struct rb_node *from_node, *to_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047) struct module_info *from_m, *to_m;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048) int ret = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050) if (read_proc_modules(from, &from_modules))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053) if (read_proc_modules(to, &to_modules))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054) goto out_delete_from;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056) from_node = rb_first(&from_modules);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057) to_node = rb_first(&to_modules);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1058) while (from_node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059) if (!to_node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062) from_m = rb_entry(from_node, struct module_info, rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063) to_m = rb_entry(to_node, struct module_info, rb_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065) if (from_m->start != to_m->start ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066) strcmp(from_m->name, to_m->name))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069) from_node = rb_next(from_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070) to_node = rb_next(to_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073) if (!from_node && !to_node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074) ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076) delete_modules(&to_modules);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1077) out_delete_from:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1078) delete_modules(&from_modules);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1079)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083) static int do_validate_kcore_modules(const char *filename, struct maps *kmaps)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085) struct rb_root modules = RB_ROOT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086) struct map *old_map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089) err = read_proc_modules(filename, &modules);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1090) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1091) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1092)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1093) maps__for_each_entry(kmaps, old_map) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1094) struct module_info *mi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1095)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1096) if (!__map__is_kmodule(old_map)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1097) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1098) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1099)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1100) /* Module must be in memory at the same address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1101) mi = find_module(old_map->dso->short_name, &modules);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1102) if (!mi || mi->start != old_map->start) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1103) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1104) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1105) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1107) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1108) delete_modules(&modules);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1109) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1110) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1112) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1113) * If kallsyms is referenced by name then we look for filename in the same
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1114) * directory.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1115) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1116) static bool filename_from_kallsyms_filename(char *filename,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1117) const char *base_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1118) const char *kallsyms_filename)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1119) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1120) char *name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1122) strcpy(filename, kallsyms_filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1123) name = strrchr(filename, '/');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1124) if (!name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1125) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1127) name += 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1129) if (!strcmp(name, "kallsyms")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1130) strcpy(name, base_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1131) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1132) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1134) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1135) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1137) static int validate_kcore_modules(const char *kallsyms_filename,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1138) struct map *map)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1139) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1140) struct maps *kmaps = map__kmaps(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1141) char modules_filename[PATH_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1143) if (!kmaps)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1144) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1146) if (!filename_from_kallsyms_filename(modules_filename, "modules",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1147) kallsyms_filename))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1148) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1150) if (do_validate_kcore_modules(modules_filename, kmaps))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1151) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1153) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1154) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1156) static int validate_kcore_addresses(const char *kallsyms_filename,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1157) struct map *map)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1158) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1159) struct kmap *kmap = map__kmap(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1161) if (!kmap)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1162) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1164) if (kmap->ref_reloc_sym && kmap->ref_reloc_sym->name) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1165) u64 start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1167) if (kallsyms__get_function_start(kallsyms_filename,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1168) kmap->ref_reloc_sym->name, &start))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1169) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1170) if (start != kmap->ref_reloc_sym->addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1171) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1172) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1174) return validate_kcore_modules(kallsyms_filename, map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1175) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1177) struct kcore_mapfn_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1178) struct dso *dso;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1179) struct list_head maps;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1180) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1182) static int kcore_mapfn(u64 start, u64 len, u64 pgoff, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1183) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1184) struct kcore_mapfn_data *md = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1185) struct map *map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1187) map = map__new2(start, md->dso);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1188) if (map == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1189) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1191) map->end = map->start + len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1192) map->pgoff = pgoff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1194) list_add(&map->node, &md->maps);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1196) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1197) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1199) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1200) * Merges map into maps by splitting the new map within the existing map
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1201) * regions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1202) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1203) int maps__merge_in(struct maps *kmaps, struct map *new_map)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1204) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1205) struct map *old_map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1206) LIST_HEAD(merged);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1208) maps__for_each_entry(kmaps, old_map) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1209) /* no overload with this one */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1210) if (new_map->end < old_map->start ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1211) new_map->start >= old_map->end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1212) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1213)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1214) if (new_map->start < old_map->start) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1215) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1216) * |new......
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1217) * |old....
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1218) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1219) if (new_map->end < old_map->end) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1220) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1221) * |new......| -> |new..|
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1222) * |old....| -> |old....|
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1223) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1224) new_map->end = old_map->start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1225) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1226) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1227) * |new.............| -> |new..| |new..|
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1228) * |old....| -> |old....|
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1229) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1230) struct map *m = map__clone(new_map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1231)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1232) if (!m)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1233) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1234)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1235) m->end = old_map->start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1236) list_add_tail(&m->node, &merged);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1237) new_map->pgoff += old_map->end - new_map->start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1238) new_map->start = old_map->end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1239) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1240) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1241) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1242) * |new......
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1243) * |old....
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1244) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1245) if (new_map->end < old_map->end) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1246) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1247) * |new..| -> x
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1248) * |old.........| -> |old.........|
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1249) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1250) map__put(new_map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1251) new_map = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1252) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1253) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1254) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1255) * |new......| -> |new...|
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1256) * |old....| -> |old....|
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1257) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1258) new_map->pgoff += old_map->end - new_map->start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1259) new_map->start = old_map->end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1260) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1261) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1262) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1263)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1264) while (!list_empty(&merged)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1265) old_map = list_entry(merged.next, struct map, node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1266) list_del_init(&old_map->node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1267) maps__insert(kmaps, old_map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1268) map__put(old_map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1269) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1270)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1271) if (new_map) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1272) maps__insert(kmaps, new_map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1273) map__put(new_map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1274) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1275) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1276) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1277)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1278) static int dso__load_kcore(struct dso *dso, struct map *map,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1279) const char *kallsyms_filename)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1280) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1281) struct maps *kmaps = map__kmaps(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1282) struct kcore_mapfn_data md;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1283) struct map *old_map, *new_map, *replacement_map = NULL, *next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1284) struct machine *machine;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1285) bool is_64_bit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1286) int err, fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1287) char kcore_filename[PATH_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1288) u64 stext;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1289)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1290) if (!kmaps)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1291) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1292)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1293) machine = kmaps->machine;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1294)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1295) /* This function requires that the map is the kernel map */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1296) if (!__map__is_kernel(map))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1297) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1298)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1299) if (!filename_from_kallsyms_filename(kcore_filename, "kcore",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1300) kallsyms_filename))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1301) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1302)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1303) /* Modules and kernel must be present at their original addresses */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1304) if (validate_kcore_addresses(kallsyms_filename, map))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1305) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1306)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1307) md.dso = dso;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1308) INIT_LIST_HEAD(&md.maps);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1309)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1310) fd = open(kcore_filename, O_RDONLY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1311) if (fd < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1312) pr_debug("Failed to open %s. Note /proc/kcore requires CAP_SYS_RAWIO capability to access.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1313) kcore_filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1314) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1315) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1316)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1317) /* Read new maps into temporary lists */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1318) err = file__read_maps(fd, map->prot & PROT_EXEC, kcore_mapfn, &md,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1319) &is_64_bit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1320) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1321) goto out_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1322) dso->is_64_bit = is_64_bit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1323)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1324) if (list_empty(&md.maps)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1325) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1326) goto out_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1327) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1328)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1329) /* Remove old maps */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1330) maps__for_each_entry_safe(kmaps, old_map, next) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1331) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1332) * We need to preserve eBPF maps even if they are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1333) * covered by kcore, because we need to access
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1334) * eBPF dso for source data.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1335) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1336) if (old_map != map && !__map__is_bpf_prog(old_map))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1337) maps__remove(kmaps, old_map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1338) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1339) machine->trampolines_mapped = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1340)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1341) /* Find the kernel map using the '_stext' symbol */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1342) if (!kallsyms__get_function_start(kallsyms_filename, "_stext", &stext)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1343) list_for_each_entry(new_map, &md.maps, node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1344) if (stext >= new_map->start && stext < new_map->end) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1345) replacement_map = new_map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1346) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1347) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1348) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1349) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1350)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1351) if (!replacement_map)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1352) replacement_map = list_entry(md.maps.next, struct map, node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1353)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1354) /* Add new maps */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1355) while (!list_empty(&md.maps)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1356) new_map = list_entry(md.maps.next, struct map, node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1357) list_del_init(&new_map->node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1358) if (new_map == replacement_map) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1359) map->start = new_map->start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1360) map->end = new_map->end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1361) map->pgoff = new_map->pgoff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1362) map->map_ip = new_map->map_ip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1363) map->unmap_ip = new_map->unmap_ip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1364) /* Ensure maps are correctly ordered */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1365) map__get(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1366) maps__remove(kmaps, map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1367) maps__insert(kmaps, map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1368) map__put(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1369) map__put(new_map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1370) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1371) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1372) * Merge kcore map into existing maps,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1373) * and ensure that current maps (eBPF)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1374) * stay intact.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1375) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1376) if (maps__merge_in(kmaps, new_map))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1377) goto out_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1378) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1379) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1380)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1381) if (machine__is(machine, "x86_64")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1382) u64 addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1383)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1384) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1385) * If one of the corresponding symbols is there, assume the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1386) * entry trampoline maps are too.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1387) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1388) if (!kallsyms__get_function_start(kallsyms_filename,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1389) ENTRY_TRAMPOLINE_NAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1390) &addr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1391) machine->trampolines_mapped = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1392) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1393)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1394) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1395) * Set the data type and long name so that kcore can be read via
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1396) * dso__data_read_addr().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1397) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1398) if (dso->kernel == DSO_SPACE__KERNEL_GUEST)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1399) dso->binary_type = DSO_BINARY_TYPE__GUEST_KCORE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1400) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1401) dso->binary_type = DSO_BINARY_TYPE__KCORE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1402) dso__set_long_name(dso, strdup(kcore_filename), true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1403)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1404) close(fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1405)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1406) if (map->prot & PROT_EXEC)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1407) pr_debug("Using %s for kernel object code\n", kcore_filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1408) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1409) pr_debug("Using %s for kernel data\n", kcore_filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1410)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1411) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1412)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1413) out_err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1414) while (!list_empty(&md.maps)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1415) map = list_entry(md.maps.next, struct map, node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1416) list_del_init(&map->node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1417) map__put(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1418) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1419) close(fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1420) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1421) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1422)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1423) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1424) * If the kernel is relocated at boot time, kallsyms won't match. Compute the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1425) * delta based on the relocation reference symbol.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1426) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1427) static int kallsyms__delta(struct kmap *kmap, const char *filename, u64 *delta)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1428) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1429) u64 addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1430)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1431) if (!kmap->ref_reloc_sym || !kmap->ref_reloc_sym->name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1432) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1433)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1434) if (kallsyms__get_function_start(filename, kmap->ref_reloc_sym->name, &addr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1435) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1436)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1437) *delta = addr - kmap->ref_reloc_sym->addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1438) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1439) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1440)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1441) int __dso__load_kallsyms(struct dso *dso, const char *filename,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1442) struct map *map, bool no_kcore)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1443) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1444) struct kmap *kmap = map__kmap(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1445) u64 delta = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1446)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1447) if (symbol__restricted_filename(filename, "/proc/kallsyms"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1448) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1449)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1450) if (!kmap || !kmap->kmaps)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1451) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1452)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1453) if (dso__load_all_kallsyms(dso, filename) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1454) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1455)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1456) if (kallsyms__delta(kmap, filename, &delta))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1457) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1458)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1459) symbols__fixup_end(&dso->symbols);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1460) symbols__fixup_duplicate(&dso->symbols);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1461)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1462) if (dso->kernel == DSO_SPACE__KERNEL_GUEST)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1463) dso->symtab_type = DSO_BINARY_TYPE__GUEST_KALLSYMS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1464) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1465) dso->symtab_type = DSO_BINARY_TYPE__KALLSYMS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1466)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1467) if (!no_kcore && !dso__load_kcore(dso, map, filename))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1468) return maps__split_kallsyms_for_kcore(kmap->kmaps, dso);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1469) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1470) return maps__split_kallsyms(kmap->kmaps, dso, delta, map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1471) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1472)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1473) int dso__load_kallsyms(struct dso *dso, const char *filename,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1474) struct map *map)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1475) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1476) return __dso__load_kallsyms(dso, filename, map, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1477) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1478)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1479) static int dso__load_perf_map(const char *map_path, struct dso *dso)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1480) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1481) char *line = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1482) size_t n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1483) FILE *file;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1484) int nr_syms = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1485)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1486) file = fopen(map_path, "r");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1487) if (file == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1488) goto out_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1489)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1490) while (!feof(file)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1491) u64 start, size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1492) struct symbol *sym;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1493) int line_len, len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1494)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1495) line_len = getline(&line, &n, file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1496) if (line_len < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1497) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1498)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1499) if (!line)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1500) goto out_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1501)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1502) line[--line_len] = '\0'; /* \n */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1503)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1504) len = hex2u64(line, &start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1505)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1506) len++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1507) if (len + 2 >= line_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1508) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1509)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1510) len += hex2u64(line + len, &size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1511)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1512) len++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1513) if (len + 2 >= line_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1514) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1515)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1516) sym = symbol__new(start, size, STB_GLOBAL, STT_FUNC, line + len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1517)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1518) if (sym == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1519) goto out_delete_line;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1520)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1521) symbols__insert(&dso->symbols, sym);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1522) nr_syms++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1523) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1524)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1525) free(line);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1526) fclose(file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1527)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1528) return nr_syms;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1529)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1530) out_delete_line:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1531) free(line);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1532) out_failure:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1533) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1534) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1535)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1536) #ifdef HAVE_LIBBFD_SUPPORT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1537) #define PACKAGE 'perf'
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1538) #include <bfd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1539)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1540) static int bfd_symbols__cmpvalue(const void *a, const void *b)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1541) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1542) const asymbol *as = *(const asymbol **)a, *bs = *(const asymbol **)b;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1543)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1544) if (bfd_asymbol_value(as) != bfd_asymbol_value(bs))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1545) return bfd_asymbol_value(as) - bfd_asymbol_value(bs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1546)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1547) return bfd_asymbol_name(as)[0] - bfd_asymbol_name(bs)[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1548) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1549)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1550) static int bfd2elf_binding(asymbol *symbol)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1551) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1552) if (symbol->flags & BSF_WEAK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1553) return STB_WEAK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1554) if (symbol->flags & BSF_GLOBAL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1555) return STB_GLOBAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1556) if (symbol->flags & BSF_LOCAL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1557) return STB_LOCAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1558) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1559) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1560)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1561) int dso__load_bfd_symbols(struct dso *dso, const char *debugfile)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1562) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1563) int err = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1564) long symbols_size, symbols_count, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1565) asection *section;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1566) asymbol **symbols, *sym;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1567) struct symbol *symbol;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1568) bfd *abfd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1569) u64 start, len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1570)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1571) abfd = bfd_openr(dso->long_name, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1572) if (!abfd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1573) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1574)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1575) if (!bfd_check_format(abfd, bfd_object)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1576) pr_debug2("%s: cannot read %s bfd file.\n", __func__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1577) dso->long_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1578) goto out_close;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1579) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1580)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1581) if (bfd_get_flavour(abfd) == bfd_target_elf_flavour)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1582) goto out_close;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1583)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1584) section = bfd_get_section_by_name(abfd, ".text");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1585) if (section)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1586) dso->text_offset = section->vma - section->filepos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1587)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1588) bfd_close(abfd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1589)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1590) abfd = bfd_openr(debugfile, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1591) if (!abfd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1592) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1593)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1594) if (!bfd_check_format(abfd, bfd_object)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1595) pr_debug2("%s: cannot read %s bfd file.\n", __func__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1596) debugfile);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1597) goto out_close;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1598) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1599)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1600) if (bfd_get_flavour(abfd) == bfd_target_elf_flavour)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1601) goto out_close;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1602)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1603) symbols_size = bfd_get_symtab_upper_bound(abfd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1604) if (symbols_size == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1605) bfd_close(abfd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1606) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1607) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1608)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1609) if (symbols_size < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1610) goto out_close;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1611)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1612) symbols = malloc(symbols_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1613) if (!symbols)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1614) goto out_close;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1615)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1616) symbols_count = bfd_canonicalize_symtab(abfd, symbols);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1617) if (symbols_count < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1618) goto out_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1619)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1620) qsort(symbols, symbols_count, sizeof(asymbol *), bfd_symbols__cmpvalue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1621)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1622) #ifdef bfd_get_section
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1623) #define bfd_asymbol_section bfd_get_section
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1624) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1625) for (i = 0; i < symbols_count; ++i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1626) sym = symbols[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1627) section = bfd_asymbol_section(sym);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1628) if (bfd2elf_binding(sym) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1629) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1630)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1631) while (i + 1 < symbols_count &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1632) bfd_asymbol_section(symbols[i + 1]) == section &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1633) bfd2elf_binding(symbols[i + 1]) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1634) i++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1635)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1636) if (i + 1 < symbols_count &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1637) bfd_asymbol_section(symbols[i + 1]) == section)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1638) len = symbols[i + 1]->value - sym->value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1639) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1640) len = section->size - sym->value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1641)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1642) start = bfd_asymbol_value(sym) - dso->text_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1643) symbol = symbol__new(start, len, bfd2elf_binding(sym), STT_FUNC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1644) bfd_asymbol_name(sym));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1645) if (!symbol)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1646) goto out_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1647)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1648) symbols__insert(&dso->symbols, symbol);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1649) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1650) #ifdef bfd_get_section
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1651) #undef bfd_asymbol_section
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1652) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1653)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1654) symbols__fixup_end(&dso->symbols);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1655) symbols__fixup_duplicate(&dso->symbols);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1656) dso->adjust_symbols = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1657)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1658) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1659) out_free:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1660) free(symbols);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1661) out_close:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1662) bfd_close(abfd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1663) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1664) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1665) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1666)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1667) static bool dso__is_compatible_symtab_type(struct dso *dso, bool kmod,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1668) enum dso_binary_type type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1669) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1670) switch (type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1671) case DSO_BINARY_TYPE__JAVA_JIT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1672) case DSO_BINARY_TYPE__DEBUGLINK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1673) case DSO_BINARY_TYPE__SYSTEM_PATH_DSO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1674) case DSO_BINARY_TYPE__FEDORA_DEBUGINFO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1675) case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1676) case DSO_BINARY_TYPE__MIXEDUP_UBUNTU_DEBUGINFO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1677) case DSO_BINARY_TYPE__BUILDID_DEBUGINFO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1678) case DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1679) return !kmod && dso->kernel == DSO_SPACE__USER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1680)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1681) case DSO_BINARY_TYPE__KALLSYMS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1682) case DSO_BINARY_TYPE__VMLINUX:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1683) case DSO_BINARY_TYPE__KCORE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1684) return dso->kernel == DSO_SPACE__KERNEL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1685)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1686) case DSO_BINARY_TYPE__GUEST_KALLSYMS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1687) case DSO_BINARY_TYPE__GUEST_VMLINUX:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1688) case DSO_BINARY_TYPE__GUEST_KCORE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1689) return dso->kernel == DSO_SPACE__KERNEL_GUEST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1690)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1691) case DSO_BINARY_TYPE__GUEST_KMODULE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1692) case DSO_BINARY_TYPE__GUEST_KMODULE_COMP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1693) case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1694) case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1695) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1696) * kernel modules know their symtab type - it's set when
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1697) * creating a module dso in machine__addnew_module_map().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1698) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1699) return kmod && dso->symtab_type == type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1700)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1701) case DSO_BINARY_TYPE__BUILD_ID_CACHE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1702) case DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1703) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1704)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1705) case DSO_BINARY_TYPE__BPF_PROG_INFO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1706) case DSO_BINARY_TYPE__BPF_IMAGE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1707) case DSO_BINARY_TYPE__OOL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1708) case DSO_BINARY_TYPE__NOT_FOUND:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1709) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1710) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1711) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1712) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1713)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1714) /* Checks for the existence of the perf-<pid>.map file in two different
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1715) * locations. First, if the process is a separate mount namespace, check in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1716) * that namespace using the pid of the innermost pid namespace. If's not in a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1717) * namespace, or the file can't be found there, try in the mount namespace of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1718) * the tracing process using our view of its pid.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1719) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1720) static int dso__find_perf_map(char *filebuf, size_t bufsz,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1721) struct nsinfo **nsip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1722) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1723) struct nscookie nsc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1724) struct nsinfo *nsi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1725) struct nsinfo *nnsi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1726) int rc = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1727)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1728) nsi = *nsip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1729)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1730) if (nsi->need_setns) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1731) snprintf(filebuf, bufsz, "/tmp/perf-%d.map", nsi->nstgid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1732) nsinfo__mountns_enter(nsi, &nsc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1733) rc = access(filebuf, R_OK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1734) nsinfo__mountns_exit(&nsc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1735) if (rc == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1736) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1737) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1738)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1739) nnsi = nsinfo__copy(nsi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1740) if (nnsi) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1741) nsinfo__put(nsi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1742)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1743) nnsi->need_setns = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1744) snprintf(filebuf, bufsz, "/tmp/perf-%d.map", nnsi->tgid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1745) *nsip = nnsi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1746) rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1747) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1748)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1749) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1750) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1751)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1752) int dso__load(struct dso *dso, struct map *map)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1753) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1754) char *name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1755) int ret = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1756) u_int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1757) struct machine *machine = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1758) char *root_dir = (char *) "";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1759) int ss_pos = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1760) struct symsrc ss_[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1761) struct symsrc *syms_ss = NULL, *runtime_ss = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1762) bool kmod;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1763) bool perfmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1764) struct build_id bid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1765) struct nscookie nsc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1766) char newmapname[PATH_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1767) const char *map_path = dso->long_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1768)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1769) perfmap = strncmp(dso->name, "/tmp/perf-", 10) == 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1770) if (perfmap) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1771) if (dso->nsinfo && (dso__find_perf_map(newmapname,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1772) sizeof(newmapname), &dso->nsinfo) == 0)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1773) map_path = newmapname;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1774) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1775) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1776)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1777) nsinfo__mountns_enter(dso->nsinfo, &nsc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1778) pthread_mutex_lock(&dso->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1779)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1780) /* check again under the dso->lock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1781) if (dso__loaded(dso)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1782) ret = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1783) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1784) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1785)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1786) kmod = dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1787) dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1788) dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1789) dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE_COMP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1790)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1791) if (dso->kernel && !kmod) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1792) if (dso->kernel == DSO_SPACE__KERNEL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1793) ret = dso__load_kernel_sym(dso, map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1794) else if (dso->kernel == DSO_SPACE__KERNEL_GUEST)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1795) ret = dso__load_guest_kernel_sym(dso, map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1796)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1797) machine = map__kmaps(map)->machine;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1798) if (machine__is(machine, "x86_64"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1799) machine__map_x86_64_entry_trampolines(machine, dso);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1800) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1801) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1802)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1803) dso->adjust_symbols = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1804)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1805) if (perfmap) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1806) ret = dso__load_perf_map(map_path, dso);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1807) dso->symtab_type = ret > 0 ? DSO_BINARY_TYPE__JAVA_JIT :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1808) DSO_BINARY_TYPE__NOT_FOUND;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1809) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1810) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1811)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1812) if (machine)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1813) root_dir = machine->root_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1814)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1815) name = malloc(PATH_MAX);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1816) if (!name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1817) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1818)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1819) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1820) * Read the build id if possible. This is required for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1821) * DSO_BINARY_TYPE__BUILDID_DEBUGINFO to work
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1822) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1823) if (!dso->has_build_id &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1824) is_regular_file(dso->long_name)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1825) __symbol__join_symfs(name, PATH_MAX, dso->long_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1826) if (filename__read_build_id(name, &bid) > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1827) dso__set_build_id(dso, &bid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1828) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1829)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1830) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1831) * Iterate over candidate debug images.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1832) * Keep track of "interesting" ones (those which have a symtab, dynsym,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1833) * and/or opd section) for processing.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1834) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1835) for (i = 0; i < DSO_BINARY_TYPE__SYMTAB_CNT; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1836) struct symsrc *ss = &ss_[ss_pos];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1837) bool next_slot = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1838) bool is_reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1839) bool nsexit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1840) int bfdrc = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1841) int sirc = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1842)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1843) enum dso_binary_type symtab_type = binary_type_symtab[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1844)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1845) nsexit = (symtab_type == DSO_BINARY_TYPE__BUILD_ID_CACHE ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1846) symtab_type == DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1847)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1848) if (!dso__is_compatible_symtab_type(dso, kmod, symtab_type))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1849) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1850)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1851) if (dso__read_binary_type_filename(dso, symtab_type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1852) root_dir, name, PATH_MAX))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1853) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1854)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1855) if (nsexit)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1856) nsinfo__mountns_exit(&nsc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1857)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1858) is_reg = is_regular_file(name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1859) #ifdef HAVE_LIBBFD_SUPPORT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1860) if (is_reg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1861) bfdrc = dso__load_bfd_symbols(dso, name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1862) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1863) if (is_reg && bfdrc < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1864) sirc = symsrc__init(ss, dso, name, symtab_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1865)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1866) if (nsexit)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1867) nsinfo__mountns_enter(dso->nsinfo, &nsc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1868)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1869) if (bfdrc == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1870) ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1871) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1872) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1873)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1874) if (!is_reg || sirc < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1875) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1876)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1877) if (!syms_ss && symsrc__has_symtab(ss)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1878) syms_ss = ss;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1879) next_slot = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1880) if (!dso->symsrc_filename)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1881) dso->symsrc_filename = strdup(name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1882) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1883)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1884) if (!runtime_ss && symsrc__possibly_runtime(ss)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1885) runtime_ss = ss;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1886) next_slot = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1887) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1888)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1889) if (next_slot) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1890) ss_pos++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1891)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1892) if (syms_ss && runtime_ss)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1893) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1894) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1895) symsrc__destroy(ss);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1896) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1897)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1898) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1899)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1900) if (!runtime_ss && !syms_ss)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1901) goto out_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1902)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1903) if (runtime_ss && !syms_ss) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1904) syms_ss = runtime_ss;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1905) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1906)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1907) /* We'll have to hope for the best */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1908) if (!runtime_ss && syms_ss)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1909) runtime_ss = syms_ss;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1910)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1911) if (syms_ss)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1912) ret = dso__load_sym(dso, map, syms_ss, runtime_ss, kmod);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1913) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1914) ret = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1915)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1916) if (ret > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1917) int nr_plt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1918)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1919) nr_plt = dso__synthesize_plt_symbols(dso, runtime_ss);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1920) if (nr_plt > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1921) ret += nr_plt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1922) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1923)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1924) for (; ss_pos > 0; ss_pos--)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1925) symsrc__destroy(&ss_[ss_pos - 1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1926) out_free:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1927) free(name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1928) if (ret < 0 && strstr(dso->name, " (deleted)") != NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1929) ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1930) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1931) dso__set_loaded(dso);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1932) pthread_mutex_unlock(&dso->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1933) nsinfo__mountns_exit(&nsc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1934)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1935) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1936) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1937)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1938) static int map__strcmp(const void *a, const void *b)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1939) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1940) const struct map *ma = *(const struct map **)a, *mb = *(const struct map **)b;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1941) return strcmp(ma->dso->short_name, mb->dso->short_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1942) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1943)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1944) static int map__strcmp_name(const void *name, const void *b)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1945) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1946) const struct map *map = *(const struct map **)b;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1947) return strcmp(name, map->dso->short_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1948) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1949)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1950) void __maps__sort_by_name(struct maps *maps)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1951) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1952) qsort(maps->maps_by_name, maps->nr_maps, sizeof(struct map *), map__strcmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1953) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1954)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1955) static int map__groups__sort_by_name_from_rbtree(struct maps *maps)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1956) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1957) struct map *map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1958) struct map **maps_by_name = realloc(maps->maps_by_name, maps->nr_maps * sizeof(map));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1959) int i = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1960)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1961) if (maps_by_name == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1962) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1963)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1964) maps->maps_by_name = maps_by_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1965) maps->nr_maps_allocated = maps->nr_maps;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1966)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1967) maps__for_each_entry(maps, map)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1968) maps_by_name[i++] = map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1969)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1970) __maps__sort_by_name(maps);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1971) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1972) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1973)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1974) static struct map *__maps__find_by_name(struct maps *maps, const char *name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1975) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1976) struct map **mapp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1977)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1978) if (maps->maps_by_name == NULL &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1979) map__groups__sort_by_name_from_rbtree(maps))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1980) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1981)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1982) mapp = bsearch(name, maps->maps_by_name, maps->nr_maps, sizeof(*mapp), map__strcmp_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1983) if (mapp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1984) return *mapp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1985) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1986) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1987)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1988) struct map *maps__find_by_name(struct maps *maps, const char *name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1989) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1990) struct map *map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1991)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1992) down_read(&maps->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1993)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1994) if (maps->last_search_by_name && strcmp(maps->last_search_by_name->dso->short_name, name) == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1995) map = maps->last_search_by_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1996) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1997) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1998) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1999) * If we have maps->maps_by_name, then the name isn't in the rbtree,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2000) * as maps->maps_by_name mirrors the rbtree when lookups by name are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2001) * made.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2002) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2003) map = __maps__find_by_name(maps, name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2004) if (map || maps->maps_by_name != NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2005) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2006)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2007) /* Fallback to traversing the rbtree... */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2008) maps__for_each_entry(maps, map)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2009) if (strcmp(map->dso->short_name, name) == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2010) maps->last_search_by_name = map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2011) goto out_unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2012) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2013)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2014) map = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2015)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2016) out_unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2017) up_read(&maps->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2018) return map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2019) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2020)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2021) int dso__load_vmlinux(struct dso *dso, struct map *map,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2022) const char *vmlinux, bool vmlinux_allocated)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2023) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2024) int err = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2025) struct symsrc ss;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2026) char symfs_vmlinux[PATH_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2027) enum dso_binary_type symtab_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2028)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2029) if (vmlinux[0] == '/')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2030) snprintf(symfs_vmlinux, sizeof(symfs_vmlinux), "%s", vmlinux);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2031) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2032) symbol__join_symfs(symfs_vmlinux, vmlinux);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2033)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2034) if (dso->kernel == DSO_SPACE__KERNEL_GUEST)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2035) symtab_type = DSO_BINARY_TYPE__GUEST_VMLINUX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2036) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2037) symtab_type = DSO_BINARY_TYPE__VMLINUX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2038)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2039) if (symsrc__init(&ss, dso, symfs_vmlinux, symtab_type))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2040) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2041)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2042) err = dso__load_sym(dso, map, &ss, &ss, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2043) symsrc__destroy(&ss);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2044)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2045) if (err > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2046) if (dso->kernel == DSO_SPACE__KERNEL_GUEST)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2047) dso->binary_type = DSO_BINARY_TYPE__GUEST_VMLINUX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2048) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2049) dso->binary_type = DSO_BINARY_TYPE__VMLINUX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2050) dso__set_long_name(dso, vmlinux, vmlinux_allocated);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2051) dso__set_loaded(dso);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2052) pr_debug("Using %s for symbols\n", symfs_vmlinux);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2053) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2054)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2055) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2056) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2057)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2058) int dso__load_vmlinux_path(struct dso *dso, struct map *map)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2059) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2060) int i, err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2061) char *filename = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2062)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2063) pr_debug("Looking at the vmlinux_path (%d entries long)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2064) vmlinux_path__nr_entries + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2065)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2066) for (i = 0; i < vmlinux_path__nr_entries; ++i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2067) err = dso__load_vmlinux(dso, map, vmlinux_path[i], false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2068) if (err > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2069) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2070) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2071)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2072) if (!symbol_conf.ignore_vmlinux_buildid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2073) filename = dso__build_id_filename(dso, NULL, 0, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2074) if (filename != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2075) err = dso__load_vmlinux(dso, map, filename, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2076) if (err > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2077) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2078) free(filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2079) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2080) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2081) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2082) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2083)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2084) static bool visible_dir_filter(const char *name, struct dirent *d)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2085) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2086) if (d->d_type != DT_DIR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2087) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2088) return lsdir_no_dot_filter(name, d);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2089) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2090)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2091) static int find_matching_kcore(struct map *map, char *dir, size_t dir_sz)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2092) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2093) char kallsyms_filename[PATH_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2094) int ret = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2095) struct strlist *dirs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2096) struct str_node *nd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2097)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2098) dirs = lsdir(dir, visible_dir_filter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2099) if (!dirs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2100) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2102) strlist__for_each_entry(nd, dirs) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2103) scnprintf(kallsyms_filename, sizeof(kallsyms_filename),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2104) "%s/%s/kallsyms", dir, nd->s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2105) if (!validate_kcore_addresses(kallsyms_filename, map)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2106) strlcpy(dir, kallsyms_filename, dir_sz);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2107) ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2108) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2109) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2110) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2112) strlist__delete(dirs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2114) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2115) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2117) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2118) * Use open(O_RDONLY) to check readability directly instead of access(R_OK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2119) * since access(R_OK) only checks with real UID/GID but open() use effective
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2120) * UID/GID and actual capabilities (e.g. /proc/kcore requires CAP_SYS_RAWIO).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2121) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2122) static bool filename__readable(const char *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2123) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2124) int fd = open(file, O_RDONLY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2125) if (fd < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2126) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2127) close(fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2128) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2129) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2131) static char *dso__find_kallsyms(struct dso *dso, struct map *map)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2132) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2133) struct build_id bid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2134) char sbuild_id[SBUILD_ID_SIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2135) bool is_host = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2136) char path[PATH_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2138) if (!dso->has_build_id) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2139) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2140) * Last resort, if we don't have a build-id and couldn't find
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2141) * any vmlinux file, try the running kernel kallsyms table.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2142) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2143) goto proc_kallsyms;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2144) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2146) if (sysfs__read_build_id("/sys/kernel/notes", &bid) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2147) is_host = dso__build_id_equal(dso, &bid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2149) /* Try a fast path for /proc/kallsyms if possible */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2150) if (is_host) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2151) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2152) * Do not check the build-id cache, unless we know we cannot use
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2153) * /proc/kcore or module maps don't match to /proc/kallsyms.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2154) * To check readability of /proc/kcore, do not use access(R_OK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2155) * since /proc/kcore requires CAP_SYS_RAWIO to read and access
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2156) * can't check it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2157) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2158) if (filename__readable("/proc/kcore") &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2159) !validate_kcore_addresses("/proc/kallsyms", map))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2160) goto proc_kallsyms;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2161) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2163) build_id__sprintf(&dso->bid, sbuild_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2165) /* Find kallsyms in build-id cache with kcore */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2166) scnprintf(path, sizeof(path), "%s/%s/%s",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2167) buildid_dir, DSO__NAME_KCORE, sbuild_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2169) if (!find_matching_kcore(map, path, sizeof(path)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2170) return strdup(path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2172) /* Use current /proc/kallsyms if possible */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2173) if (is_host) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2174) proc_kallsyms:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2175) return strdup("/proc/kallsyms");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2176) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2178) /* Finally, find a cache of kallsyms */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2179) if (!build_id_cache__kallsyms_path(sbuild_id, path, sizeof(path))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2180) pr_err("No kallsyms or vmlinux with build-id %s was found\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2181) sbuild_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2182) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2183) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2185) return strdup(path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2186) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2187)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2188) static int dso__load_kernel_sym(struct dso *dso, struct map *map)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2189) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2190) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2191) const char *kallsyms_filename = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2192) char *kallsyms_allocated_filename = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2193) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2194) * Step 1: if the user specified a kallsyms or vmlinux filename, use
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2195) * it and only it, reporting errors to the user if it cannot be used.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2196) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2197) * For instance, try to analyse an ARM perf.data file _without_ a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2198) * build-id, or if the user specifies the wrong path to the right
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2199) * vmlinux file, obviously we can't fallback to another vmlinux (a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2200) * x86_86 one, on the machine where analysis is being performed, say),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2201) * or worse, /proc/kallsyms.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2202) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2203) * If the specified file _has_ a build-id and there is a build-id
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2204) * section in the perf.data file, we will still do the expected
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2205) * validation in dso__load_vmlinux and will bail out if they don't
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2206) * match.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2207) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2208) if (symbol_conf.kallsyms_name != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2209) kallsyms_filename = symbol_conf.kallsyms_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2210) goto do_kallsyms;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2211) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2213) if (!symbol_conf.ignore_vmlinux && symbol_conf.vmlinux_name != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2214) return dso__load_vmlinux(dso, map, symbol_conf.vmlinux_name, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2215) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2216)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2217) if (!symbol_conf.ignore_vmlinux && vmlinux_path != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2218) err = dso__load_vmlinux_path(dso, map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2219) if (err > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2220) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2221) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2223) /* do not try local files if a symfs was given */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2224) if (symbol_conf.symfs[0] != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2225) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2227) kallsyms_allocated_filename = dso__find_kallsyms(dso, map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2228) if (!kallsyms_allocated_filename)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2229) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2231) kallsyms_filename = kallsyms_allocated_filename;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2232)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2233) do_kallsyms:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2234) err = dso__load_kallsyms(dso, kallsyms_filename, map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2235) if (err > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2236) pr_debug("Using %s for symbols\n", kallsyms_filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2237) free(kallsyms_allocated_filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2238)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2239) if (err > 0 && !dso__is_kcore(dso)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2240) dso->binary_type = DSO_BINARY_TYPE__KALLSYMS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2241) dso__set_long_name(dso, DSO__NAME_KALLSYMS, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2242) map__fixup_start(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2243) map__fixup_end(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2244) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2246) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2247) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2249) static int dso__load_guest_kernel_sym(struct dso *dso, struct map *map)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2250) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2251) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2252) const char *kallsyms_filename = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2253) struct machine *machine = map__kmaps(map)->machine;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2254) char path[PATH_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2255)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2256) if (machine__is_default_guest(machine)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2257) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2258) * if the user specified a vmlinux filename, use it and only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2259) * it, reporting errors to the user if it cannot be used.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2260) * Or use file guest_kallsyms inputted by user on commandline
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2261) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2262) if (symbol_conf.default_guest_vmlinux_name != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2263) err = dso__load_vmlinux(dso, map,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2264) symbol_conf.default_guest_vmlinux_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2265) false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2266) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2267) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2268)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2269) kallsyms_filename = symbol_conf.default_guest_kallsyms;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2270) if (!kallsyms_filename)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2271) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2272) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2273) sprintf(path, "%s/proc/kallsyms", machine->root_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2274) kallsyms_filename = path;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2275) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2276)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2277) err = dso__load_kallsyms(dso, kallsyms_filename, map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2278) if (err > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2279) pr_debug("Using %s for symbols\n", kallsyms_filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2280) if (err > 0 && !dso__is_kcore(dso)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2281) dso->binary_type = DSO_BINARY_TYPE__GUEST_KALLSYMS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2282) dso__set_long_name(dso, machine->mmap_name, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2283) map__fixup_start(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2284) map__fixup_end(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2285) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2286)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2287) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2288) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2289)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2290) static void vmlinux_path__exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2291) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2292) while (--vmlinux_path__nr_entries >= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2293) zfree(&vmlinux_path[vmlinux_path__nr_entries]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2294) vmlinux_path__nr_entries = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2295)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2296) zfree(&vmlinux_path);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2297) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2298)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2299) static const char * const vmlinux_paths[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2300) "vmlinux",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2301) "/boot/vmlinux"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2302) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2303)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2304) static const char * const vmlinux_paths_upd[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2305) "/boot/vmlinux-%s",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2306) "/usr/lib/debug/boot/vmlinux-%s",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2307) "/lib/modules/%s/build/vmlinux",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2308) "/usr/lib/debug/lib/modules/%s/vmlinux",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2309) "/usr/lib/debug/boot/vmlinux-%s.debug"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2310) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2311)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2312) static int vmlinux_path__add(const char *new_entry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2313) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2314) vmlinux_path[vmlinux_path__nr_entries] = strdup(new_entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2315) if (vmlinux_path[vmlinux_path__nr_entries] == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2316) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2317) ++vmlinux_path__nr_entries;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2318)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2319) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2320) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2322) static int vmlinux_path__init(struct perf_env *env)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2323) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2324) struct utsname uts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2325) char bf[PATH_MAX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2326) char *kernel_version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2327) unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2328)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2329) vmlinux_path = malloc(sizeof(char *) * (ARRAY_SIZE(vmlinux_paths) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2330) ARRAY_SIZE(vmlinux_paths_upd)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2331) if (vmlinux_path == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2332) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2333)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2334) for (i = 0; i < ARRAY_SIZE(vmlinux_paths); i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2335) if (vmlinux_path__add(vmlinux_paths[i]) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2336) goto out_fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2337)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2338) /* only try kernel version if no symfs was given */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2339) if (symbol_conf.symfs[0] != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2340) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2341)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2342) if (env) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2343) kernel_version = env->os_release;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2344) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2345) if (uname(&uts) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2346) goto out_fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2347)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2348) kernel_version = uts.release;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2349) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2350)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2351) for (i = 0; i < ARRAY_SIZE(vmlinux_paths_upd); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2352) snprintf(bf, sizeof(bf), vmlinux_paths_upd[i], kernel_version);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2353) if (vmlinux_path__add(bf) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2354) goto out_fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2355) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2356)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2357) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2358)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2359) out_fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2360) vmlinux_path__exit();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2361) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2362) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2363)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2364) int setup_list(struct strlist **list, const char *list_str,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2365) const char *list_name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2366) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2367) if (list_str == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2368) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2369)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2370) *list = strlist__new(list_str, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2371) if (!*list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2372) pr_err("problems parsing %s list\n", list_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2373) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2374) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2375)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2376) symbol_conf.has_filter = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2377) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2378) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2379)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2380) int setup_intlist(struct intlist **list, const char *list_str,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2381) const char *list_name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2382) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2383) if (list_str == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2384) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2385)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2386) *list = intlist__new(list_str);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2387) if (!*list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2388) pr_err("problems parsing %s list\n", list_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2389) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2390) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2391) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2392) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2393)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2394) static bool symbol__read_kptr_restrict(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2395) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2396) bool value = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2397) FILE *fp = fopen("/proc/sys/kernel/kptr_restrict", "r");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2398)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2399) if (fp != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2400) char line[8];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2401)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2402) if (fgets(line, sizeof(line), fp) != NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2403) value = perf_cap__capable(CAP_SYSLOG) ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2404) (atoi(line) >= 2) :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2405) (atoi(line) != 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2406)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2407) fclose(fp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2408) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2409)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2410) /* Per kernel/kallsyms.c:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2411) * we also restrict when perf_event_paranoid > 1 w/o CAP_SYSLOG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2412) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2413) if (perf_event_paranoid() > 1 && !perf_cap__capable(CAP_SYSLOG))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2414) value = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2415)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2416) return value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2417) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2418)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2419) int symbol__annotation_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2420) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2421) if (symbol_conf.init_annotation)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2422) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2423)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2424) if (symbol_conf.initialized) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2425) pr_err("Annotation needs to be init before symbol__init()\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2426) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2427) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2428)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2429) symbol_conf.priv_size += sizeof(struct annotation);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2430) symbol_conf.init_annotation = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2431) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2432) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2433)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2434) int symbol__init(struct perf_env *env)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2435) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2436) const char *symfs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2437)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2438) if (symbol_conf.initialized)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2439) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2440)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2441) symbol_conf.priv_size = PERF_ALIGN(symbol_conf.priv_size, sizeof(u64));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2442)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2443) symbol__elf_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2444)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2445) if (symbol_conf.sort_by_name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2446) symbol_conf.priv_size += (sizeof(struct symbol_name_rb_node) -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2447) sizeof(struct symbol));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2448)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2449) if (symbol_conf.try_vmlinux_path && vmlinux_path__init(env) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2450) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2451)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2452) if (symbol_conf.field_sep && *symbol_conf.field_sep == '.') {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2453) pr_err("'.' is the only non valid --field-separator argument\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2454) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2455) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2456)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2457) if (setup_list(&symbol_conf.dso_list,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2458) symbol_conf.dso_list_str, "dso") < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2459) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2460)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2461) if (setup_list(&symbol_conf.comm_list,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2462) symbol_conf.comm_list_str, "comm") < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2463) goto out_free_dso_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2464)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2465) if (setup_intlist(&symbol_conf.pid_list,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2466) symbol_conf.pid_list_str, "pid") < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2467) goto out_free_comm_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2468)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2469) if (setup_intlist(&symbol_conf.tid_list,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2470) symbol_conf.tid_list_str, "tid") < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2471) goto out_free_pid_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2472)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2473) if (setup_list(&symbol_conf.sym_list,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2474) symbol_conf.sym_list_str, "symbol") < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2475) goto out_free_tid_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2476)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2477) if (setup_list(&symbol_conf.bt_stop_list,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2478) symbol_conf.bt_stop_list_str, "symbol") < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2479) goto out_free_sym_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2480)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2481) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2482) * A path to symbols of "/" is identical to ""
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2483) * reset here for simplicity.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2484) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2485) symfs = realpath(symbol_conf.symfs, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2486) if (symfs == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2487) symfs = symbol_conf.symfs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2488) if (strcmp(symfs, "/") == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2489) symbol_conf.symfs = "";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2490) if (symfs != symbol_conf.symfs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2491) free((void *)symfs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2492)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2493) symbol_conf.kptr_restrict = symbol__read_kptr_restrict();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2494)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2495) symbol_conf.initialized = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2496) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2497)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2498) out_free_sym_list:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2499) strlist__delete(symbol_conf.sym_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2500) out_free_tid_list:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2501) intlist__delete(symbol_conf.tid_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2502) out_free_pid_list:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2503) intlist__delete(symbol_conf.pid_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2504) out_free_comm_list:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2505) strlist__delete(symbol_conf.comm_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2506) out_free_dso_list:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2507) strlist__delete(symbol_conf.dso_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2508) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2509) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2510)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2511) void symbol__exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2512) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2513) if (!symbol_conf.initialized)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2514) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2515) strlist__delete(symbol_conf.bt_stop_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2516) strlist__delete(symbol_conf.sym_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2517) strlist__delete(symbol_conf.dso_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2518) strlist__delete(symbol_conf.comm_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2519) intlist__delete(symbol_conf.tid_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2520) intlist__delete(symbol_conf.pid_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2521) vmlinux_path__exit();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2522) symbol_conf.sym_list = symbol_conf.dso_list = symbol_conf.comm_list = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2523) symbol_conf.bt_stop_list = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2524) symbol_conf.initialized = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2525) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2526)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2527) int symbol__config_symfs(const struct option *opt __maybe_unused,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2528) const char *dir, int unset __maybe_unused)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2529) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2530) char *bf = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2531) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2532)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2533) symbol_conf.symfs = strdup(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2534) if (symbol_conf.symfs == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2535) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2536)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2537) /* skip the locally configured cache if a symfs is given, and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2538) * config buildid dir to symfs/.debug
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2539) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2540) ret = asprintf(&bf, "%s/%s", dir, ".debug");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2541) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2542) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2543)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2544) set_buildid_dir(bf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2545)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2546) free(bf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2547) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2548) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2549)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2550) struct mem_info *mem_info__get(struct mem_info *mi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2551) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2552) if (mi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2553) refcount_inc(&mi->refcnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2554) return mi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2555) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2556)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2557) void mem_info__put(struct mem_info *mi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2558) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2559) if (mi && refcount_dec_and_test(&mi->refcnt))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2560) free(mi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2561) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2562)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2563) struct mem_info *mem_info__new(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2564) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2565) struct mem_info *mi = zalloc(sizeof(*mi));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2566)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2567) if (mi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2568) refcount_set(&mi->refcnt, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2569) return mi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2570) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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