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Differential D23652 Diff 68242 libexec/rtld-elf/amd64/reloc.c

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libexec/rtld-elf/amd64/reloc.c

Show First 20 Lines • Show All 297 Lines • ▼ Show 20 Lines case R_X86_64_DTPOFF64:
break; break;
case R_X86_64_DTPOFF32: case R_X86_64_DTPOFF32:
*where32 += (Elf32_Addr)(def->st_value + *where32 += (Elf32_Addr)(def->st_value +
rela->r_addend); rela->r_addend);
break; break;
case R_X86_64_RELATIVE: case R_X86_64_RELATIVE:
*where = (Elf_Addr)(obj->relocbase + rela->r_addend); *where = (Elf_Addr)(obj->relocbase + rela->r_addend);
break; break;
case R_X86_64_IRELATIVE:
emasteUnsubmitted
Done
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tiny nit, extra space here compared to others

emaste: tiny nit, extra space here compared to others
obj->irelative_nonplt = true;
break;
/* /*
* missing: * missing:
* R_X86_64_GOTPCREL, R_X86_64_32, R_X86_64_32S, R_X86_64_16, * R_X86_64_GOTPCREL, R_X86_64_32, R_X86_64_32S, R_X86_64_16,
* R_X86_64_PC16, R_X86_64_8, R_X86_64_PC8 * R_X86_64_PC16, R_X86_64_8, R_X86_64_PC8
*/ */
default: default:
_rtld_error("%s: Unsupported relocation type %u" _rtld_error("%s: Unsupported relocation type %u"
" in non-PLT relocations\n", obj->path, " in non-PLT relocations\n", obj->path,
▲ Show 20 Lines • Show All 91 Lines • ▼ Show 20 Lines
#ifdef dbg #ifdef dbg
dbg("reloc_jmpslot: *%p = %p", where, (void *)target); dbg("reloc_jmpslot: *%p = %p", where, (void *)target);
#endif #endif
if (!ld_bind_not) if (!ld_bind_not)
*where = target; *where = target;
return (target); return (target);
} }
static void
reloc_iresolve_one(Obj_Entry *obj, const Elf_Rela *rela,
RtldLockState *lockstate)
{
Elf_Addr *where, target, *ptr;
ptr = (Elf_Addr *)(obj->relocbase + rela->r_addend);
where = (Elf_Addr *)(obj->relocbase + rela->r_offset);
lock_release(rtld_bind_lock, lockstate);
target = call_ifunc_resolver(ptr);
wlock_acquire(rtld_bind_lock, lockstate);
*where = target;
}
int int
reloc_iresolve(Obj_Entry *obj, RtldLockState *lockstate) reloc_iresolve(Obj_Entry *obj, RtldLockState *lockstate)
{ {
const Elf_Rela *relalim; const Elf_Rela *relalim;
const Elf_Rela *rela; const Elf_Rela *rela;
if (!obj->irelative) if (!obj->irelative)
return (0); return (0);
relalim = (const Elf_Rela *)((const char *)obj->pltrela + obj->pltrelasize); obj->irelative = false;
relalim = (const Elf_Rela *)((const char *)obj->pltrela +
obj->pltrelasize);
for (rela = obj->pltrela; rela < relalim; rela++) { for (rela = obj->pltrela; rela < relalim; rela++) {
Elf_Addr *where, target, *ptr; if (ELF_R_TYPE(rela->r_info) == R_X86_64_IRELATIVE)
reloc_iresolve_one(obj, rela, lockstate);
}
return (0);
}
switch (ELF_R_TYPE(rela->r_info)) { int
case R_X86_64_JMP_SLOT: reloc_iresolve_nonplt(Obj_Entry *obj, RtldLockState *lockstate)
break; {
const Elf_Rela *relalim;
const Elf_Rela *rela;
case R_X86_64_IRELATIVE: if (!obj->irelative_nonplt)
ptr = (Elf_Addr *)(obj->relocbase + rela->r_addend); return (0);
where = (Elf_Addr *)(obj->relocbase + rela->r_offset); obj->irelative_nonplt = false;
lock_release(rtld_bind_lock, lockstate); relalim = (const Elf_Rela *)((const char *)obj->rela + obj->relasize);
target = call_ifunc_resolver(ptr); for (rela = obj->rela; rela < relalim; rela++) {
wlock_acquire(rtld_bind_lock, lockstate); if (ELF_R_TYPE(rela->r_info) == R_X86_64_IRELATIVE)
*where = target; reloc_iresolve_one(obj, rela, lockstate);
break;
} }
}
obj->irelative = false;
return (0); return (0);
} }
int int
reloc_gnu_ifunc(Obj_Entry *obj, int flags, RtldLockState *lockstate) reloc_gnu_ifunc(Obj_Entry *obj, int flags, RtldLockState *lockstate)
{ {
const Elf_Rela *relalim; const Elf_Rela *relalim;
const Elf_Rela *rela; const Elf_Rela *rela;
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