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tools: relocate-rela: Extract elf64 reloc to special function

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Adding support for new type requires to change code layout that's why move
elf64 code to own function for easier maintenance.

It also solves the problem with not calling fclose in case of error.
Return value from rela_elf64 is saved to variable that's why fclose() is
called all the time.

Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/21763b80527521c85ca7d4ac64ad6ff4885409c8.1655299267.git.michal.simek@amd.com
This commit is contained in:
Michal Simek 2022-06-24 14:15:00 +02:00
parent 07c052be51
commit 582ffb5cb3
1 changed files with 53 additions and 43 deletions
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96
tools/relocate-rela.c
View file

@ -216,49 +216,9 @@ static int decode_elf(char **argv)
return 1; return 1;
} }
int main(int argc, char **argv) static int rela_elf64(char **argv, FILE *f)
{ {
FILE *f; int i, num;
int i, num, ret;
uint64_t file_size;
if (argc != 3) {
fprintf(stderr, "Statically apply ELF rela relocations\n");
fprintf(stderr, "Usage: %s <bin file> <u-boot ELF>\n",
argv[0]);
return 1;
}
ret = decode_elf(argv);
if (ret) {
fprintf(stderr, "ELF decoding failed\n");
return ret;
}
if (rela_start > rela_end || rela_start < text_base) {
fprintf(stderr, "%s: bad rela bounds\n", argv[0]);
return 3;
}
rela_start -= text_base;
rela_end -= text_base;
f = fopen(argv[1], "r+b");
if (!f) {
fprintf(stderr, "%s: Cannot open %s: %s\n",
argv[0], argv[1], strerror(errno));
return 2;
}
fseek(f, 0, SEEK_END);
file_size = ftell(f);
rewind(f);
if (rela_end > file_size) {
// Most likely compiler inserted some section that didn't get
// objcopy-ed into the final binary
rela_end = file_size;
}
if ((rela_end - rela_start) % sizeof(Elf64_Rela)) { if ((rela_end - rela_start) % sizeof(Elf64_Rela)) {
fprintf(stderr, "%s: rela size isn't a multiple of Elf64_Rela\n", argv[0]); fprintf(stderr, "%s: rela size isn't a multiple of Elf64_Rela\n", argv[0]);
@ -316,11 +276,61 @@ int main(int argc, char **argv)
} }
} }
return 0;
}
int main(int argc, char **argv)
{
FILE *f;
int ret;
uint64_t file_size;
if (argc != 3) {
fprintf(stderr, "Statically apply ELF rela relocations\n");
fprintf(stderr, "Usage: %s <bin file> <u-boot ELF>\n",
argv[0]);
return 1;
}
ret = decode_elf(argv);
if (ret) {
fprintf(stderr, "ELF decoding failed\n");
return ret;
}
if (rela_start > rela_end || rela_start < text_base) {
fprintf(stderr, "%s: bad rela bounds\n", argv[0]);
return 3;
}
rela_start -= text_base;
rela_end -= text_base;
f = fopen(argv[1], "r+b");
if (!f) {
fprintf(stderr, "%s: Cannot open %s: %s\n",
argv[0], argv[1], strerror(errno));
return 2;
}
fseek(f, 0, SEEK_END);
file_size = ftell(f);
rewind(f);
if (rela_end > file_size) {
// Most likely compiler inserted some section that didn't get
// objcopy-ed into the final binary
rela_end = file_size;
}
if (ei_class == 2)
ret = rela_elf64(argv, f);
if (fclose(f) < 0) { if (fclose(f) < 0) {
fprintf(stderr, "%s: %s: close failed: %s\n", fprintf(stderr, "%s: %s: close failed: %s\n",
argv[0], argv[1], strerror(errno)); argv[0], argv[1], strerror(errno));
return 4; return 4;
} }
return 0; return ret;
} }