From 534661b91c98492995274c364c8177c45efc63db Mon Sep 17 00:00:00 2001 From: Austin Foxley Date: Sat, 19 Sep 2009 10:04:05 -0700 Subject: ldso/: tls support for dynamic linker Signed-off-by: Austin Foxley --- ldso/ldso/arm/elfinterp.c | 52 +++++++++++++++++++++++++++++++++++------------ 1 file changed, 39 insertions(+), 13 deletions(-) (limited to 'ldso/ldso/arm/elfinterp.c') diff --git a/ldso/ldso/arm/elfinterp.c b/ldso/ldso/arm/elfinterp.c index 197975e4a..1469df016 100644 --- a/ldso/ldso/arm/elfinterp.c +++ b/ldso/ldso/arm/elfinterp.c @@ -50,7 +50,7 @@ unsigned long _dl_linux_resolver(struct elf_resolve *tpnt, int reloc_entry) Elf32_Sym *symtab; ELF_RELOC *rel_addr; int symtab_index; - char *new_addr; + unsigned long new_addr; char **got_addr; unsigned long instr_addr; @@ -70,7 +70,7 @@ unsigned long _dl_linux_resolver(struct elf_resolve *tpnt, int reloc_entry) /* Get the address of the GOT entry */ new_addr = _dl_find_hash(symname, tpnt->symbol_scope, - tpnt, ELF_RTYPE_CLASS_PLT); + tpnt, ELF_RTYPE_CLASS_PLT, NULL); if (unlikely(!new_addr)) { _dl_dprintf(2, "%s: can't resolve symbol '%s'\n", _dl_progname, symname); @@ -89,13 +89,13 @@ unsigned long _dl_linux_resolver(struct elf_resolve *tpnt, int reloc_entry) } } if (!_dl_debug_nofixups) { - *got_addr = new_addr; + *got_addr = (char*)new_addr; } #else - *got_addr = new_addr; + *got_addr = (char*)new_addr; #endif - return (unsigned long) new_addr; + return new_addr; } static int @@ -188,28 +188,40 @@ _dl_do_reloc (struct elf_resolve *tpnt,struct dyn_elf *scope, int symtab_index; unsigned long *reloc_addr; unsigned long symbol_addr; + const Elf32_Sym *def = 0; + struct elf_resolve *def_mod = 0; int goof = 0; - reloc_addr = (unsigned long *) (tpnt->loadaddr + (unsigned long) rpnt->r_offset); + reloc_addr = (unsigned long *) (tpnt->loadaddr + + (unsigned long) rpnt->r_offset); + reloc_type = ELF32_R_TYPE(rpnt->r_info); symtab_index = ELF32_R_SYM(rpnt->r_info); symbol_addr = 0; if (symtab_index) { - - symbol_addr = (unsigned long) _dl_find_hash(strtab + symtab[symtab_index].st_name, - scope, tpnt, elf_machine_type_class(reloc_type)); + symbol_addr = _dl_find_hash(strtab + symtab[symtab_index].st_name, + scope, tpnt, + elf_machine_type_class(reloc_type), + &def_mod); /* * 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 (!symbol_addr && ELF32_ST_BIND(symtab[symtab_index].st_info) != STB_WEAK) { - _dl_dprintf (2, "%s: can't resolve symbol '%s'\n", - _dl_progname, strtab + symtab[symtab_index].st_name); - _dl_exit (1); + if (!symbol_addr && (ELF_ST_TYPE(symtab[symtab_index].st_info) != STT_TLS) + && (ELF32_ST_BIND(symtab[symtab_index].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 = symtab[symtab_index].st_value; + def_mod = tpnt; } #if defined (__SUPPORT_LD_DEBUG__) @@ -265,6 +277,20 @@ _dl_do_reloc (struct elf_resolve *tpnt,struct dyn_elf *scope, _dl_memcpy((void *) reloc_addr, (void *) symbol_addr, symtab[symtab_index].st_size); break; +#if USE_TLS + case R_ARM_TLS_DTPMOD32: + *reloc_addr = def_mod->l_tls_modid; + break; + + case R_ARM_TLS_DTPOFF32: + *reloc_addr += symbol_addr; + break; + + case R_ARM_TLS_TPOFF32: + CHECK_STATIC_TLS ((struct link_map *) def_mod); + *reloc_addr += (symbol_addr + def_mod->l_tls_offset); + break; +#endif default: return -1; /*call _dl_exit(1) */ } -- cgit v1.2.3