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lib: launch: implement GLOB_DAT and RELATIVE relocations

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max 🍓
2026-03-21 10:53:10 +00:00
parent 8236f99aef
commit 5d9a3fa54d
1 changed files with 22 additions and 0 deletions
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22
lib/liblaunch/elf.c
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@@ -334,6 +334,28 @@ static enum launch_status do_rela(struct elf_image *image, elf_rela_t *rela)
ELF64_R_SYM(rela->r_info), ELF64_R_SYM(rela->r_info),
rela->r_addend); rela->r_addend);
break; break;
case R_X86_64_GLOB_DAT:
sym = get_dynsym(image, ELF64_R_SYM(rela->r_info));
if (!sym) {
return LAUNCH_ERR_MISSING_SYMBOL;
}
*(uint64_t *)(image->e_local_base + rela->r_offset)
= image->e_remote_base + sym->st_value + rela->r_addend;
kern_tracef(
"GLOB_DAT: offset=%zx, symbol=%zu, addend=%zx",
rela->r_offset,
ELF64_R_SYM(rela->r_info),
rela->r_addend);
break;
case R_X86_64_RELATIVE:
*(uint64_t *)(image->e_local_base + rela->r_offset)
= image->e_remote_base + rela->r_addend;
kern_tracef(
"RELATIVE: offset=%zx, addend=%zx",
rela->r_offset,
rela->r_addend);
break;
default: default:
kern_trace("Unknown relocation type"); kern_trace("Unknown relocation type");
return LAUNCH_ERR_UNSUPPORTED_EXECUTABLE; return LAUNCH_ERR_UNSUPPORTED_EXECUTABLE;