^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * recordmcount.c: construct a table of the locations of calls to 'mcount'
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * so that ftrace can find them quickly.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright 2009 John F. Reiser <jreiser@BitWagon.com>. All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Restructured to fit Linux format, as well as other updates:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Copyright 2010 Steven Rostedt <srostedt@redhat.com>, Red Hat Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * Strategy: alter the .o file in-place.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * Append a new STRTAB that has the new section names, followed by a new array
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * ElfXX_Shdr[] that has the new section headers, followed by the section
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * contents for __mcount_loc and its relocations. The old shstrtab strings,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * and the old ElfXX_Shdr[] array, remain as "garbage" (commonly, a couple
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * kilobytes.) Subsequent processing by /bin/ld (or the kernel module loader)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * will ignore the garbage regions, because they are not designated by the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * new .e_shoff nor the new ElfXX_Shdr[]. [In order to remove the garbage,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * then use "ld -r" to create a new file that omits the garbage.]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <sys/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <sys/mman.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <sys/stat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <getopt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <elf.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <fcntl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include <stdio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <stdlib.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include <string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include <unistd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #ifndef EM_AARCH64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #define EM_AARCH64 183
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #define R_AARCH64_NONE 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #define R_AARCH64_ABS64 257
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #define R_ARM_PC24 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #define R_ARM_THM_CALL 10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #define R_ARM_CALL 28
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #define R_AARCH64_CALL26 283
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) static int fd_map; /* File descriptor for file being modified. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) static int mmap_failed; /* Boolean flag. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) static char gpfx; /* prefix for global symbol name (sometimes '_') */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) static struct stat sb; /* Remember .st_size, etc. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) static const char *altmcount; /* alternate mcount symbol name */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) static int warn_on_notrace_sect; /* warn when section has mcount not being recorded */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) static void *file_map; /* pointer of the mapped file */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) static void *file_end; /* pointer to the end of the mapped file */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) static int file_updated; /* flag to state file was changed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) static void *file_ptr; /* current file pointer location */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) static void *file_append; /* added to the end of the file */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) static size_t file_append_size; /* how much is added to end of file */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) /* Per-file resource cleanup when multiple files. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) static void file_append_cleanup(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) free(file_append);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) file_append = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) file_append_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) file_updated = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) static void mmap_cleanup(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) if (!mmap_failed)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) munmap(file_map, sb.st_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) free(file_map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) file_map = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) /* ulseek, uwrite, ...: Check return value for errors. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) static off_t ulseek(off_t const offset, int const whence)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) switch (whence) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) case SEEK_SET:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) file_ptr = file_map + offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) case SEEK_CUR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) file_ptr += offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) case SEEK_END:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) file_ptr = file_map + (sb.st_size - offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) if (file_ptr < file_map) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) fprintf(stderr, "lseek: seek before file\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) return file_ptr - file_map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) static ssize_t uwrite(void const *const buf, size_t const count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) size_t cnt = count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) off_t idx = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) file_updated = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) if (file_ptr + count >= file_end) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) off_t aoffset = (file_ptr + count) - file_end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) if (aoffset > file_append_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) file_append = realloc(file_append, aoffset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) file_append_size = aoffset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) if (!file_append) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) perror("write");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) file_append_cleanup();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) mmap_cleanup();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) if (file_ptr < file_end) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) cnt = file_end - file_ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) cnt = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) idx = aoffset - count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) if (cnt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) memcpy(file_ptr, buf, cnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) if (cnt < count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) memcpy(file_append + idx, buf + cnt, count - cnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) file_ptr += count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) static void * umalloc(size_t size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) void *const addr = malloc(size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) if (addr == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) fprintf(stderr, "malloc failed: %zu bytes\n", size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) file_append_cleanup();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) mmap_cleanup();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) return addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) * Get the whole file as a programming convenience in order to avoid
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) * malloc+lseek+read+free of many pieces. If successful, then mmap
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) * avoids copying unused pieces; else just read the whole file.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) * Open for both read and write; new info will be appended to the file.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) * Use MAP_PRIVATE so that a few changes to the in-memory ElfXX_Ehdr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) * do not propagate to the file until an explicit overwrite at the last.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) * This preserves most aspects of consistency (all except .st_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) * for simultaneous readers of the file while we are appending to it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) * However, multiple writers still are bad. We choose not to use
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) * locking because it is expensive and the use case of kernel build
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) * makes multiple writers unlikely.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) static void *mmap_file(char const *fname)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) /* Avoid problems if early cleanup() */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) fd_map = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) mmap_failed = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) file_map = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) file_ptr = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) file_updated = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) sb.st_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) fd_map = open(fname, O_RDONLY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) if (fd_map < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) perror(fname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) if (fstat(fd_map, &sb) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) perror(fname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) if (!S_ISREG(sb.st_mode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) fprintf(stderr, "not a regular file: %s\n", fname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) file_map = mmap(0, sb.st_size, PROT_READ|PROT_WRITE, MAP_PRIVATE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) fd_map, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) if (file_map == MAP_FAILED) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) mmap_failed = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) file_map = umalloc(sb.st_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) if (!file_map) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) perror(fname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) if (read(fd_map, file_map, sb.st_size) != sb.st_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) perror(fname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) free(file_map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) file_map = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) mmap_failed = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) close(fd_map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) fd_map = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) file_end = file_map + sb.st_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) return file_map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) static unsigned char ideal_nop5_x86_64[5] = { 0x0f, 0x1f, 0x44, 0x00, 0x00 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) static unsigned char ideal_nop5_x86_32[5] = { 0x3e, 0x8d, 0x74, 0x26, 0x00 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) static unsigned char *ideal_nop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) static char rel_type_nop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) static int (*make_nop)(void *map, size_t const offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) static int make_nop_x86(void *map, size_t const offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) uint32_t *ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) unsigned char *op;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) /* Confirm we have 0xe8 0x0 0x0 0x0 0x0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) ptr = map + offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) if (*ptr != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) op = map + offset - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) if (*op != 0xe8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) /* convert to nop */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) if (ulseek(offset - 1, SEEK_SET) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) if (uwrite(ideal_nop, 5) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) static unsigned char ideal_nop4_arm_le[4] = { 0x00, 0x00, 0xa0, 0xe1 }; /* mov r0, r0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) static unsigned char ideal_nop4_arm_be[4] = { 0xe1, 0xa0, 0x00, 0x00 }; /* mov r0, r0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) static unsigned char *ideal_nop4_arm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) static unsigned char bl_mcount_arm_le[4] = { 0xfe, 0xff, 0xff, 0xeb }; /* bl */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) static unsigned char bl_mcount_arm_be[4] = { 0xeb, 0xff, 0xff, 0xfe }; /* bl */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) static unsigned char *bl_mcount_arm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) static unsigned char push_arm_le[4] = { 0x04, 0xe0, 0x2d, 0xe5 }; /* push {lr} */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) static unsigned char push_arm_be[4] = { 0xe5, 0x2d, 0xe0, 0x04 }; /* push {lr} */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) static unsigned char *push_arm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) static unsigned char ideal_nop2_thumb_le[2] = { 0x00, 0xbf }; /* nop */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) static unsigned char ideal_nop2_thumb_be[2] = { 0xbf, 0x00 }; /* nop */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) static unsigned char *ideal_nop2_thumb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) static unsigned char push_bl_mcount_thumb_le[6] = { 0x00, 0xb5, 0xff, 0xf7, 0xfe, 0xff }; /* push {lr}, bl */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) static unsigned char push_bl_mcount_thumb_be[6] = { 0xb5, 0x00, 0xf7, 0xff, 0xff, 0xfe }; /* push {lr}, bl */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) static unsigned char *push_bl_mcount_thumb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) static int make_nop_arm(void *map, size_t const offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) char *ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) int cnt = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) int nop_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) size_t off = offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) ptr = map + offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) if (memcmp(ptr, bl_mcount_arm, 4) == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) if (memcmp(ptr - 4, push_arm, 4) == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) off -= 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) cnt = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) ideal_nop = ideal_nop4_arm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) nop_size = 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) } else if (memcmp(ptr - 2, push_bl_mcount_thumb, 6) == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) cnt = 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) nop_size = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) off -= 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) ideal_nop = ideal_nop2_thumb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) /* Convert to nop */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) if (ulseek(off, SEEK_SET) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) if (uwrite(ideal_nop, nop_size) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) } while (--cnt > 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) static unsigned char ideal_nop4_arm64[4] = {0x1f, 0x20, 0x03, 0xd5};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) static int make_nop_arm64(void *map, size_t const offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) uint32_t *ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) ptr = map + offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) /* bl <_mcount> is 0x94000000 before relocation */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) if (*ptr != 0x94000000)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) /* Convert to nop */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) if (ulseek(offset, SEEK_SET) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) if (uwrite(ideal_nop, 4) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) static int write_file(const char *fname)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) char tmp_file[strlen(fname) + 4];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) size_t n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) if (!file_updated)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) sprintf(tmp_file, "%s.rc", fname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) * After reading the entire file into memory, delete it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) * and write it back, to prevent weird side effects of modifying
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) * an object file in place.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) fd_map = open(tmp_file, O_WRONLY | O_TRUNC | O_CREAT, sb.st_mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) if (fd_map < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) perror(fname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) n = write(fd_map, file_map, sb.st_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) if (n != sb.st_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) perror("write");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) close(fd_map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) if (file_append_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) n = write(fd_map, file_append, file_append_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) if (n != file_append_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) perror("write");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) close(fd_map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) close(fd_map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) if (rename(tmp_file, fname) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) perror(fname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) /* w8rev, w8nat, ...: Handle endianness. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) static uint64_t w8rev(uint64_t const x)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) return ((0xff & (x >> (0 * 8))) << (7 * 8))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) | ((0xff & (x >> (1 * 8))) << (6 * 8))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) | ((0xff & (x >> (2 * 8))) << (5 * 8))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) | ((0xff & (x >> (3 * 8))) << (4 * 8))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) | ((0xff & (x >> (4 * 8))) << (3 * 8))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) | ((0xff & (x >> (5 * 8))) << (2 * 8))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) | ((0xff & (x >> (6 * 8))) << (1 * 8))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) | ((0xff & (x >> (7 * 8))) << (0 * 8));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) static uint32_t w4rev(uint32_t const x)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) return ((0xff & (x >> (0 * 8))) << (3 * 8))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) | ((0xff & (x >> (1 * 8))) << (2 * 8))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) | ((0xff & (x >> (2 * 8))) << (1 * 8))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) | ((0xff & (x >> (3 * 8))) << (0 * 8));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) static uint32_t w2rev(uint16_t const x)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) return ((0xff & (x >> (0 * 8))) << (1 * 8))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) | ((0xff & (x >> (1 * 8))) << (0 * 8));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) static uint64_t w8nat(uint64_t const x)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) return x;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) static uint32_t w4nat(uint32_t const x)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) return x;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) static uint32_t w2nat(uint16_t const x)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) return x;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) static uint64_t (*w8)(uint64_t);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) static uint32_t (*w)(uint32_t);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) static uint32_t (*w2)(uint16_t);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) /* Names of the sections that could contain calls to mcount. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) static int is_mcounted_section_name(char const *const txtname)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) return strncmp(".text", txtname, 5) == 0 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) strcmp(".init.text", txtname) == 0 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) strcmp(".ref.text", txtname) == 0 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) strcmp(".sched.text", txtname) == 0 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) strcmp(".spinlock.text", txtname) == 0 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) strcmp(".irqentry.text", txtname) == 0 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) strcmp(".softirqentry.text", txtname) == 0 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) strcmp(".kprobes.text", txtname) == 0 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) strcmp(".cpuidle.text", txtname) == 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) static char const *already_has_rel_mcount = "success"; /* our work here is done! */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) /* 32 bit and 64 bit are very similar */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) #include "recordmcount.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) #define RECORD_MCOUNT_64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) #include "recordmcount.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) static int arm_is_fake_mcount(Elf32_Rel const *rp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) switch (ELF32_R_TYPE(w(rp->r_info))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) case R_ARM_THM_CALL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) case R_ARM_CALL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) case R_ARM_PC24:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) return 1;
^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) static int arm64_is_fake_mcount(Elf64_Rel const *rp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) return ELF64_R_TYPE(w8(rp->r_info)) != R_AARCH64_CALL26;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) /* 64-bit EM_MIPS has weird ELF64_Rela.r_info.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) * http://techpubs.sgi.com/library/manuals/4000/007-4658-001/pdf/007-4658-001.pdf
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) * We interpret Table 29 Relocation Operation (Elf64_Rel, Elf64_Rela) [p.40]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) * to imply the order of the members; the spec does not say so.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) * typedef unsigned char Elf64_Byte;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) * fails on MIPS64 because their <elf.h> already has it!
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) typedef uint8_t myElf64_Byte; /* Type for a 8-bit quantity. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) union mips_r_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) Elf64_Xword r_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) Elf64_Word r_sym; /* Symbol index. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) myElf64_Byte r_ssym; /* Special symbol. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) myElf64_Byte r_type3; /* Third relocation. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) myElf64_Byte r_type2; /* Second relocation. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) myElf64_Byte r_type; /* First relocation. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) } r_mips;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) static uint64_t MIPS64_r_sym(Elf64_Rel const *rp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) return w(((union mips_r_info){ .r_info = rp->r_info }).r_mips.r_sym);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) static void MIPS64_r_info(Elf64_Rel *const rp, unsigned sym, unsigned type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) rp->r_info = ((union mips_r_info){
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) .r_mips = { .r_sym = w(sym), .r_type = type }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) }).r_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) static int do_file(char const *const fname)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) unsigned int reltype = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) Elf32_Ehdr *ehdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) int rc = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) ehdr = mmap_file(fname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) if (!ehdr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) w = w4nat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) w2 = w2nat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) w8 = w8nat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) switch (ehdr->e_ident[EI_DATA]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) static unsigned int const endian = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) fprintf(stderr, "unrecognized ELF data encoding %d: %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) ehdr->e_ident[EI_DATA], fname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) case ELFDATA2LSB:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) if (*(unsigned char const *)&endian != 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) /* main() is big endian, file.o is little endian. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) w = w4rev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) w2 = w2rev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) w8 = w8rev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) ideal_nop4_arm = ideal_nop4_arm_le;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) bl_mcount_arm = bl_mcount_arm_le;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) push_arm = push_arm_le;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) ideal_nop2_thumb = ideal_nop2_thumb_le;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) push_bl_mcount_thumb = push_bl_mcount_thumb_le;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) case ELFDATA2MSB:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) if (*(unsigned char const *)&endian != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) /* main() is little endian, file.o is big endian. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) w = w4rev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) w2 = w2rev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) w8 = w8rev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) ideal_nop4_arm = ideal_nop4_arm_be;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) bl_mcount_arm = bl_mcount_arm_be;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) push_arm = push_arm_be;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) ideal_nop2_thumb = ideal_nop2_thumb_be;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) push_bl_mcount_thumb = push_bl_mcount_thumb_be;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) } /* end switch */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) if (memcmp(ELFMAG, ehdr->e_ident, SELFMAG) != 0 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) w2(ehdr->e_type) != ET_REL ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) ehdr->e_ident[EI_VERSION] != EV_CURRENT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) fprintf(stderr, "unrecognized ET_REL file %s\n", fname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) gpfx = '_';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) switch (w2(ehdr->e_machine)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) fprintf(stderr, "unrecognized e_machine %u %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) w2(ehdr->e_machine), fname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) case EM_386:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) reltype = R_386_32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) rel_type_nop = R_386_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) make_nop = make_nop_x86;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) ideal_nop = ideal_nop5_x86_32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) mcount_adjust_32 = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) gpfx = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) case EM_ARM:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) reltype = R_ARM_ABS32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) altmcount = "__gnu_mcount_nc";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) make_nop = make_nop_arm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) rel_type_nop = R_ARM_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) is_fake_mcount32 = arm_is_fake_mcount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) gpfx = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) case EM_AARCH64:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) reltype = R_AARCH64_ABS64;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) make_nop = make_nop_arm64;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) rel_type_nop = R_AARCH64_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) ideal_nop = ideal_nop4_arm64;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) is_fake_mcount64 = arm64_is_fake_mcount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) case EM_IA_64: reltype = R_IA64_IMM64; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) case EM_MIPS: /* reltype: e_class */ break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) case EM_PPC: reltype = R_PPC_ADDR32; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) case EM_PPC64: reltype = R_PPC64_ADDR64; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) case EM_S390: /* reltype: e_class */ break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) case EM_SH: reltype = R_SH_DIR32; gpfx = 0; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) case EM_SPARCV9: reltype = R_SPARC_64; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) case EM_X86_64:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) make_nop = make_nop_x86;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) ideal_nop = ideal_nop5_x86_64;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) reltype = R_X86_64_64;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) rel_type_nop = R_X86_64_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) mcount_adjust_64 = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) gpfx = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) } /* end switch */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) switch (ehdr->e_ident[EI_CLASS]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) fprintf(stderr, "unrecognized ELF class %d %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) ehdr->e_ident[EI_CLASS], fname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) case ELFCLASS32:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) if (w2(ehdr->e_ehsize) != sizeof(Elf32_Ehdr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) || w2(ehdr->e_shentsize) != sizeof(Elf32_Shdr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) fprintf(stderr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) "unrecognized ET_REL file: %s\n", fname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) if (w2(ehdr->e_machine) == EM_MIPS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) reltype = R_MIPS_32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) is_fake_mcount32 = MIPS32_is_fake_mcount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) if (do32(ehdr, fname, reltype) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) case ELFCLASS64: {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) Elf64_Ehdr *const ghdr = (Elf64_Ehdr *)ehdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) if (w2(ghdr->e_ehsize) != sizeof(Elf64_Ehdr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) || w2(ghdr->e_shentsize) != sizeof(Elf64_Shdr)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) fprintf(stderr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) "unrecognized ET_REL file: %s\n", fname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) if (w2(ghdr->e_machine) == EM_S390) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) reltype = R_390_64;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) mcount_adjust_64 = -14;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) if (w2(ghdr->e_machine) == EM_MIPS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) reltype = R_MIPS_64;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) Elf64_r_sym = MIPS64_r_sym;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) Elf64_r_info = MIPS64_r_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) is_fake_mcount64 = MIPS64_is_fake_mcount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) if (do64(ghdr, fname, reltype) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) } /* end switch */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) rc = write_file(fname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) file_append_cleanup();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) mmap_cleanup();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) int main(int argc, char *argv[])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) const char ftrace[] = "/ftrace.o";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) int ftrace_size = sizeof(ftrace) - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) int n_error = 0; /* gcc-4.3.0 false positive complaint */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) int c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) while ((c = getopt(argc, argv, "w")) >= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) switch (c) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) case 'w':
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) warn_on_notrace_sect = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) fprintf(stderr, "usage: recordmcount [-w] file.o...\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) if ((argc - optind) < 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) fprintf(stderr, "usage: recordmcount [-w] file.o...\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) /* Process each file in turn, allowing deep failure. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) for (i = optind; i < argc; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) char *file = argv[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) * The file kernel/trace/ftrace.o references the mcount
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) * function but does not call it. Since ftrace.o should
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) * not be traced anyway, we just skip it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) len = strlen(file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) if (len >= ftrace_size &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) strcmp(file + (len - ftrace_size), ftrace) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) if (do_file(file)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) fprintf(stderr, "%s: failed\n", file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) ++n_error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) return !!n_error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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