diff options
Diffstat (limited to 'sysdeps/x86_64/dl-machine.h')
| -rw-r--r-- | sysdeps/x86_64/dl-machine.h | 65 |
1 files changed, 60 insertions, 5 deletions
diff --git a/sysdeps/x86_64/dl-machine.h b/sysdeps/x86_64/dl-machine.h index 2800a9e958..6179bba3f7 100644 --- a/sysdeps/x86_64/dl-machine.h +++ b/sysdeps/x86_64/dl-machine.h @@ -283,13 +283,24 @@ _dl_start_user:\n\ .previous\n\ "); -/* ELF_RTYPE_CLASS_PLT iff TYPE describes relocation of a PLT entry, so - PLT entries should not be allowed to define the value. +/* ELF_RTYPE_CLASS_PLT iff TYPE describes relocation of a PLT entry or + TLS variable, so undefined references should not be allowed to + define the value. ELF_RTYPE_CLASS_NOCOPY iff TYPE should not be allowed to resolve to one of the main executable's symbols, as for a COPY reloc. */ -#define elf_machine_type_class(type) \ - ((((type) == R_X86_64_JUMP_SLOT) * ELF_RTYPE_CLASS_PLT) \ +#ifdef USE_TLS +# define elf_machine_type_class(type) \ + ((((type) == R_X86_64_JUMP_SLOT + || (type) == R_X86_64_DTPMOD64 + || (type) == R_X86_64_DTPOFF64 || (type) == R_X86_64_DTPOFF32 + || (type) == R_X86_64_TPOFF64 || (type) == R_X86_64_TPOFF32) + * ELF_RTYPE_CLASS_PLT) \ | (((type) == R_X86_64_COPY) * ELF_RTYPE_CLASS_COPY)) +#else +# define elf_machine_type_class(type) \ + ((((type) == R_X86_64_JUMP_SLOT) * ELF_RTYPE_CLASS_PLT) \ + | (((type) == R_X86_64_COPY) * ELF_RTYPE_CLASS_COPY)) +#endif /* A reloc type used for ld.so cmdline arg lookups to reject PLT entries. */ #define ELF_MACHINE_JMP_SLOT R_X86_64_JUMP_SLOT @@ -366,14 +377,19 @@ elf_machine_rela (struct link_map *map, const Elf64_Rela *reloc, #ifndef RTLD_BOOTSTRAP const Elf64_Sym *const refsym = sym; #endif +#if defined USE_TLS && !defined RTLD_BOOTSTRAP + struct link_map *sym_map = RESOLVE_MAP (&sym, version, r_type); + Elf64_Addr value = sym == NULL ? 0 : sym_map->l_addr + sym->st_value; +#else Elf64_Addr value = RESOLVE (&sym, version, r_type); # ifndef RTLD_BOOTSTRAP if (sym != NULL) # endif value += sym->st_value; +#endif -#ifdef RTLD_BOOTSTRAP +#if defined RTLD_BOOTSTRAP && !(USE_TLS && HAVE___THREAD) assert (r_type == R_X86_64_GLOB_DAT || r_type == R_X86_64_JUMP_SLOT); *reloc_addr = value + reloc->r_addend; #else @@ -383,6 +399,44 @@ elf_machine_rela (struct link_map *map, const Elf64_Rela *reloc, case R_X86_64_JUMP_SLOT: *reloc_addr = value + reloc->r_addend; break; + +#ifdef USE_TLS + case R_X86_64_DTPMOD64: +# ifdef RTLD_BOOTSTRAP + /* During startup the dynamic linker is always the module + with index 1. + XXX If this relocation is necessary move before RESOLVE + call. */ + *reloc_addr = 1; +# else + /* Get the information from the link map returned by the + resolve function. */ + if (sym_map != NULL) + *reloc_addr = sym_map->l_tls_modid; +# endif + break; + case R_X86_64_DTPOFF64: +# ifndef RTLD_BOOTSTRAP + /* During relocation all TLS symbols are defined and used. + Therefore the offset is already correct. */ + if (sym != NULL) + *reloc_addr = sym->st_value + reloc->r_addend; +# endif + break; + case R_X86_64_TPOFF64: + /* The offset is negative, forward from the thread pointer. */ +# ifndef RTLD_BOOTSTRAP + if (sym != NULL) +# endif + /* We know the offset of the object the symbol is contained in. + It is a negative value which will be added to the + thread pointer. */ + *reloc_addr = (sym->st_value + reloc->r_addend + - sym_map->l_tls_offset); + break; +#endif /* use TLS */ + +#ifndef RTLD_BOOTSTRAP case R_X86_64_64: *reloc_addr = value + reloc->r_addend; break; @@ -439,6 +493,7 @@ elf_machine_rela (struct link_map *map, const Elf64_Rela *reloc, default: _dl_reloc_bad_type (map, r_type, 0); break; +#endif } #endif } |