2 * Copyright 2013 Freescale Semiconductor, Inc.
4 * SPDX-License-Identifier: GPL-2.0+ BSD-2-Clause
6 * 64-bit and little-endian target only until we need to support a different
7 * arch that needs this.
20 #ifndef R_AARCH64_RELATIVE
21 #define R_AARCH64_RELATIVE 1027
24 static const bool debug_en;
26 static void debug(const char *fmt, ...)
37 static bool supported_rela(Elf64_Rela *rela)
39 uint64_t mask = 0xffffffffULL; /* would be different on 32-bit */
40 uint32_t type = rela->r_info & mask;
43 #ifdef R_AARCH64_RELATIVE
44 case R_AARCH64_RELATIVE:
48 fprintf(stderr, "warning: unsupported relocation type %"
49 PRIu32 " at %" PRIx64 "\n",
50 type, rela->r_offset);
56 static bool read_num(const char *str, uint64_t *num)
59 *num = strtoull(str, &endptr, 16);
60 return str[0] && !endptr[0];
63 int main(int argc, char **argv)
67 uint64_t rela_start, rela_end, text_base;
70 fprintf(stderr, "Statically apply ELF rela relocations\n");
71 fprintf(stderr, "Usage: %s <bin file> <text base> " \
72 "<rela start> <rela end>\n", argv[0]);
73 fprintf(stderr, "All numbers in hex.\n");
77 f = fopen(argv[1], "r+b");
79 fprintf(stderr, "%s: Cannot open %s: %s\n",
80 argv[0], argv[1], strerror(errno));
84 if (!read_num(argv[2], &text_base) ||
85 !read_num(argv[3], &rela_start) ||
86 !read_num(argv[4], &rela_end)) {
87 fprintf(stderr, "%s: bad number\n", argv[0]);
91 if (rela_start > rela_end || rela_start < text_base ||
92 (rela_end - rela_start) % sizeof(Elf64_Rela)) {
93 fprintf(stderr, "%s: bad rela bounds\n", argv[0]);
97 rela_start -= text_base;
98 rela_end -= text_base;
100 num = (rela_end - rela_start) / sizeof(Elf64_Rela);
102 for (i = 0; i < num; i++) {
103 Elf64_Rela rela, swrela;
104 uint64_t pos = rela_start + sizeof(Elf64_Rela) * i;
107 if (fseek(f, pos, SEEK_SET) < 0) {
108 fprintf(stderr, "%s: %s: seek to %" PRIx64
110 argv[0], argv[1], pos, strerror(errno));
113 if (fread(&rela, sizeof(rela), 1, f) != 1) {
114 fprintf(stderr, "%s: %s: read rela failed at %"
116 argv[0], argv[1], pos);
120 swrela.r_offset = cpu_to_le64(rela.r_offset);
121 swrela.r_info = cpu_to_le64(rela.r_info);
122 swrela.r_addend = cpu_to_le64(rela.r_addend);
124 if (!supported_rela(&swrela))
127 debug("Rela %" PRIx64 " %" PRIu64 " %" PRIx64 "\n",
128 swrela.r_offset, swrela.r_info, swrela.r_addend);
130 if (swrela.r_offset < text_base) {
131 fprintf(stderr, "%s: %s: bad rela at %" PRIx64 "\n",
132 argv[0], argv[1], pos);
136 addr = swrela.r_offset - text_base;
138 if (fseek(f, addr, SEEK_SET) < 0) {
139 fprintf(stderr, "%s: %s: seek to %"
140 PRIx64 " failed: %s\n",
141 argv[0], argv[1], addr, strerror(errno));
144 if (fwrite(&rela.r_addend, sizeof(rela.r_addend), 1, f) != 1) {
145 fprintf(stderr, "%s: %s: write failed at %" PRIx64 "\n",
146 argv[0], argv[1], addr);
152 fprintf(stderr, "%s: %s: close failed: %s\n",
153 argv[0], argv[1], strerror(errno));