diff options
Diffstat (limited to 'ldso')
| -rw-r--r-- | ldso/ldso/x86_64/dl-sysdep.h | 8 | ||||
| -rw-r--r-- | ldso/ldso/x86_64/elfinterp.c | 28 |
2 files changed, 28 insertions, 8 deletions
diff --git a/ldso/ldso/x86_64/dl-sysdep.h b/ldso/ldso/x86_64/dl-sysdep.h index 0eed657e8..ae3542aed 100644 --- a/ldso/ldso/x86_64/dl-sysdep.h +++ b/ldso/ldso/x86_64/dl-sysdep.h @@ -46,8 +46,12 @@ extern unsigned long _dl_linux_resolver(struct elf_resolve * tpnt, int reloc_ent 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) \ +#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_TPOFF64) \ + * ELF_RTYPE_CLASS_PLT) \ | (((type) == R_X86_64_COPY) * ELF_RTYPE_CLASS_COPY)) /* Return the link-time address of _DYNAMIC. Conveniently, this is the diff --git a/ldso/ldso/x86_64/elfinterp.c b/ldso/ldso/x86_64/elfinterp.c index 92ac5acbc..54528d382 100644 --- a/ldso/ldso/x86_64/elfinterp.c +++ b/ldso/ldso/x86_64/elfinterp.c @@ -157,6 +157,7 @@ _dl_do_reloc(struct elf_resolve *tpnt, struct dyn_elf *scope, int reloc_type; int symtab_index; char *symname; + struct elf_resolve *tls_tpnt = 0; ElfW(Sym) *sym; ElfW(Addr) *reloc_addr; ElfW(Addr) symbol_addr; @@ -173,18 +174,26 @@ _dl_do_reloc(struct elf_resolve *tpnt, struct dyn_elf *scope, if (symtab_index) { symbol_addr = (ElfW(Addr))_dl_find_hash(symname, scope, tpnt, - elf_machine_type_class(reloc_type), NULL); + elf_machine_type_class(reloc_type), &tls_tpnt); /* * We want to allow undefined references to weak symbols - this * might have been intentional. We should not be linking local * symbols here, so all bases should be covered. */ - if (unlikely(!symbol_addr && ELF_ST_BIND(sym->st_info) != STB_WEAK)) { - _dl_dprintf(2, "%s: can't resolve symbol '%s'\n", _dl_progname, symname); - _dl_exit(1); + if (unlikely(!symbol_addr && (ELF_ST_TYPE(sym->st_info) != STT_TLS) + && (ELF_ST_BIND(sym->st_info) != STB_WEAK))) { + /* This may be non-fatal if called from dlopen. */ + return 1; } + } else { + /* Relocs against STN_UNDEF are usually treated as using a + * symbol value of zero, and using the module containing the + * reloc itself. */ + symbol_addr = sym->st_value; + tls_tpnt = tpnt; } + #if defined (__SUPPORT_LD_DEBUG__) old_val = *reloc_addr; #endif @@ -212,13 +221,20 @@ _dl_do_reloc(struct elf_resolve *tpnt, struct dyn_elf *scope, break; */ case R_X86_64_DTPMOD64: - *reloc_addr = 1; + *reloc_addr = tls_tpnt->l_tls_modid; break; case R_X86_64_DTPOFF64: + /* During relocation all TLS symbols are defined and used. + * Therefore the offset is already correct. */ *reloc_addr = sym->st_value + rpnt->r_addend; break; case R_X86_64_TPOFF64: - *reloc_addr = sym->st_value + rpnt->r_addend - symbol_addr; + /* The offset is negative, forward from the thread pointer. + * 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. */ + CHECK_STATIC_TLS ((struct link_map *) tls_tpnt); + *reloc_addr = sym->st_value - tls_tpnt->l_tls_offset + rpnt->r_addend; break; case R_X86_64_32: *(unsigned int *) reloc_addr = symbol_addr + rpnt->r_addend; |