^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * vdso2c - A vdso image preparation tool
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (c) 2014 Andy Lutomirski and others
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Licensed under the GPL v2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * vdso2c requires stripped and unstripped input. It would be trivial
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * to fully strip the input in here, but, for reasons described below,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * we need to write a section table. Doing this is more or less
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * equivalent to dropping all non-allocatable sections, but it's
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * easier to let objcopy handle that instead of doing it ourselves.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * If we ever need to do something fancier than what objcopy provides,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * it would be straightforward to add here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * We're keep a section table for a few reasons:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * The Go runtime had a couple of bugs: it would read the section
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * table to try to figure out how many dynamic symbols there were (it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * shouldn't have looked at the section table at all) and, if there
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * were no SHT_SYNDYM section table entry, it would use an
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * uninitialized value for the number of symbols. An empty DYNSYM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * table would work, but I see no reason not to write a valid one (and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) * keep full performance for old Go programs). This hack is only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) * needed on x86_64.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * The bug was introduced on 2012-08-31 by:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) * https://code.google.com/p/go/source/detail?r=56ea40aac72b
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * and was fixed on 2014-06-13 by:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * https://code.google.com/p/go/source/detail?r=fc1cd5e12595
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) * Binutils has issues debugging the vDSO: it reads the section table to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * find SHT_NOTE; it won't look at PT_NOTE for the in-memory vDSO, which
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * would break build-id if we removed the section table. Binutils
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * also requires that shstrndx != 0. See:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) * https://sourceware.org/bugzilla/show_bug.cgi?id=17064
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * elfutils might not look for PT_NOTE if there is a section table at
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) * all. I don't know whether this matters for any practical purpose.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * For simplicity, rather than hacking up a partial section table, we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) * just write a mostly complete one. We omit non-dynamic symbols,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) * though, since they're rather large.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) * Once binutils gets fixed, we might be able to drop this for all but
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) * the 64-bit vdso, since build-id only works in kernel RPMs, and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) * systems that update to new enough kernel RPMs will likely update
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) * binutils in sync. build-id has never worked for home-built kernel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) * RPMs without manual symlinking, and I suspect that no one ever does
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) * that.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #include <inttypes.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #include <stdint.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #include <unistd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #include <stdarg.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #include <stdlib.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) #include <stdio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) #include <string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) #include <fcntl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) #include <err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) #include <sys/mman.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) #include <sys/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) #include <tools/le_byteshift.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) #include <linux/elf.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) const char *outfilename;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) /* Symbols that we need in vdso2c. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) enum {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) sym_vvar_start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) sym_vvar_page,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) sym_pvclock_page,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) sym_hvclock_page,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) sym_timens_page,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) const int special_pages[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) sym_vvar_page,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) sym_pvclock_page,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) sym_hvclock_page,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) sym_timens_page,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) struct vdso_sym {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) const char *name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) bool export;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) struct vdso_sym required_syms[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) [sym_vvar_start] = {"vvar_start", true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) [sym_vvar_page] = {"vvar_page", true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) [sym_pvclock_page] = {"pvclock_page", true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) [sym_hvclock_page] = {"hvclock_page", true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) [sym_timens_page] = {"timens_page", true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) {"VDSO32_NOTE_MASK", true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) {"__kernel_vsyscall", true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) {"__kernel_sigreturn", true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) {"__kernel_rt_sigreturn", true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) {"int80_landing_pad", true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) __attribute__((format(printf, 1, 2))) __attribute__((noreturn))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) static void fail(const char *format, ...)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) va_list ap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) va_start(ap, format);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) fprintf(stderr, "Error: ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) vfprintf(stderr, format, ap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) if (outfilename)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) unlink(outfilename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) exit(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) va_end(ap);
^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) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) * Evil macros for little-endian reads and writes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) #define GLE(x, bits, ifnot) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) __builtin_choose_expr( \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) (sizeof(*(x)) == bits/8), \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) (__typeof__(*(x)))get_unaligned_le##bits(x), ifnot)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) extern void bad_get_le(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) #define LAST_GLE(x) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) __builtin_choose_expr(sizeof(*(x)) == 1, *(x), bad_get_le())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) #define GET_LE(x) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) GLE(x, 64, GLE(x, 32, GLE(x, 16, LAST_GLE(x))))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) #define PLE(x, val, bits, ifnot) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) __builtin_choose_expr( \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) (sizeof(*(x)) == bits/8), \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) put_unaligned_le##bits((val), (x)), ifnot)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) extern void bad_put_le(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) #define LAST_PLE(x, val) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) __builtin_choose_expr(sizeof(*(x)) == 1, *(x) = (val), bad_put_le())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) #define PUT_LE(x, val) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) PLE(x, val, 64, PLE(x, val, 32, PLE(x, val, 16, LAST_PLE(x, val))))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) #define NSYMS ARRAY_SIZE(required_syms)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) #define BITSFUNC3(name, bits, suffix) name##bits##suffix
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) #define BITSFUNC2(name, bits, suffix) BITSFUNC3(name, bits, suffix)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) #define BITSFUNC(name) BITSFUNC2(name, ELF_BITS, )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) #define INT_BITS BITSFUNC2(int, ELF_BITS, _t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) #define ELF_BITS_XFORM2(bits, x) Elf##bits##_##x
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) #define ELF_BITS_XFORM(bits, x) ELF_BITS_XFORM2(bits, x)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) #define ELF(x) ELF_BITS_XFORM(ELF_BITS, x)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) #define ELF_BITS 64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) #include "vdso2c.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) #undef ELF_BITS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) #define ELF_BITS 32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) #include "vdso2c.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) #undef ELF_BITS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) static void go(void *raw_addr, size_t raw_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) void *stripped_addr, size_t stripped_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) FILE *outfile, const char *name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) Elf64_Ehdr *hdr = (Elf64_Ehdr *)raw_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) if (hdr->e_ident[EI_CLASS] == ELFCLASS64) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) go64(raw_addr, raw_len, stripped_addr, stripped_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) outfile, name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) } else if (hdr->e_ident[EI_CLASS] == ELFCLASS32) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) go32(raw_addr, raw_len, stripped_addr, stripped_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) outfile, name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) fail("unknown ELF class\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) static void map_input(const char *name, void **addr, size_t *len, int prot)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) off_t tmp_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) int fd = open(name, O_RDONLY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) if (fd == -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) err(1, "open(%s)", name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) tmp_len = lseek(fd, 0, SEEK_END);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) if (tmp_len == (off_t)-1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) err(1, "lseek");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) *len = (size_t)tmp_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) *addr = mmap(NULL, tmp_len, prot, MAP_PRIVATE, fd, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) if (*addr == MAP_FAILED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) err(1, "mmap");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) close(fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) int main(int argc, char **argv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) size_t raw_len, stripped_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) void *raw_addr, *stripped_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) FILE *outfile;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) char *name, *tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) int namelen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) if (argc != 4) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) printf("Usage: vdso2c RAW_INPUT STRIPPED_INPUT OUTPUT\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) }
^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) * Figure out the struct name. If we're writing to a .so file,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) * generate raw output insted.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) name = strdup(argv[3]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) namelen = strlen(name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) if (namelen >= 3 && !strcmp(name + namelen - 3, ".so")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) name = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) tmp = strrchr(name, '/');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) if (tmp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) name = tmp + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) tmp = strchr(name, '.');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) if (tmp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) *tmp = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) for (tmp = name; *tmp; tmp++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) if (*tmp == '-')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) *tmp = '_';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) map_input(argv[1], &raw_addr, &raw_len, PROT_READ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) map_input(argv[2], &stripped_addr, &stripped_len, PROT_READ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) outfilename = argv[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) outfile = fopen(outfilename, "w");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) if (!outfile)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) err(1, "fopen(%s)", outfilename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) go(raw_addr, raw_len, stripped_addr, stripped_len, outfile, name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) munmap(raw_addr, raw_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) munmap(stripped_addr, stripped_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) fclose(outfile);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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