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ld: implement GLOB_DAT and 64 relocation types

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max 🍓
2026-04-01 19:07:31 +01:00
parent 70d32cd592
commit d2e0fa79fa
1 changed files with 29 additions and 1 deletions
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sys/ld/elf.c
+29 -1
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@@ -183,7 +183,7 @@ static int map_image(struct elf_image *image)
} }
} }
kern_logf("ld: image %s -> %zx", image->e_leaf.l_name, image->e_base); kern_tracef("ld: image %s -> %zx", image->e_leaf.l_name, image->e_base);
return SUCCESS; return SUCCESS;
} }
@@ -291,6 +291,34 @@ static int do_rela(struct elf_image *image, elf_rela_t *rela, bool lazy)
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 ENOEXEC;
}
*(uint64_t *)(image->e_base + rela->r_offset)
= image->e_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_64:
sym = get_dynsym(image, ELF64_R_SYM(rela->r_info));
if (!sym) {
return ENOEXEC;
}
*(uint64_t *)(image->e_base + rela->r_offset)
= image->e_base + sym->st_value + rela->r_addend;
kern_tracef(
"64: offset=%zx, symbol=%zu, addend=%zx",
rela->r_offset,
ELF64_R_SYM(rela->r_info),
rela->r_addend);
break;
case R_X86_64_RELATIVE: case R_X86_64_RELATIVE:
*(uint64_t *)(image->e_base + rela->r_offset) *(uint64_t *)(image->e_base + rela->r_offset)
= image->e_base + rela->r_addend; = image->e_base + rela->r_addend;