diff options
Diffstat (limited to 'ldso/ldso/mips/elfinterp.c')
| -rw-r--r-- | ldso/ldso/mips/elfinterp.c | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/ldso/ldso/mips/elfinterp.c b/ldso/ldso/mips/elfinterp.c index 1b03d9412..0ed2757b5 100644 --- a/ldso/ldso/mips/elfinterp.c +++ b/ldso/ldso/mips/elfinterp.c @@ -30,6 +30,7 @@ #include "ldso.h" extern int _dl_runtime_resolve(void); +extern int _dl_runtime_pltresolve(void); #define OFFSET_GP_GOT 0x7ff0 @@ -83,6 +84,61 @@ unsigned long __dl_runtime_resolve(unsigned long sym_index, return new_addr; } +unsigned long +__dl_runtime_pltresolve(struct elf_resolve *tpnt, int reloc_entry) +{ + int reloc_type; + ELF_RELOC *this_reloc; + char *strtab; + Elf32_Sym *symtab; + int symtab_index; + char *rel_addr; + char *new_addr; + char **got_addr; + unsigned long instr_addr; + char *symname; + + rel_addr = (char *)tpnt->dynamic_info[DT_JMPREL]; + this_reloc = (ELF_RELOC *)(intptr_t)(rel_addr + reloc_entry); + reloc_type = ELF32_R_TYPE(this_reloc->r_info); + symtab_index = ELF32_R_SYM(this_reloc->r_info); + + symtab = (Elf32_Sym *)(intptr_t)tpnt->dynamic_info[DT_SYMTAB]; + strtab = (char *)tpnt->dynamic_info[DT_STRTAB]; + symname = strtab + symtab[symtab_index].st_name; + + /* Address of the jump instruction to fix up. */ + instr_addr = ((unsigned long)this_reloc->r_offset + + (unsigned long)tpnt->loadaddr); + got_addr = (char **)instr_addr; + + /* Get the address of the GOT entry. */ + new_addr = _dl_find_hash(symname, tpnt->symbol_scope, tpnt, ELF_RTYPE_CLASS_PLT); + if (unlikely(!new_addr)) { + _dl_dprintf(2, "%s: can't resolve symbol '%s' in lib '%s'.\n", _dl_progname, symname, tpnt->libname); + _dl_exit(1); + } + +#if defined (__SUPPORT_LD_DEBUG__) + if ((unsigned long)got_addr < 0x40000000) { + if (_dl_debug_bindings) { + _dl_dprintf(_dl_debug_file, "\nresolve function: %s", symname); + if (_dl_debug_detail) + _dl_dprintf(_dl_debug_file, + "\n\tpatched: %x ==> %x @ %x", + *got_addr, new_addr, got_addr); + } + } + if (!_dl_debug_nofixups) { + *got_addr = new_addr; + } +#else + *got_addr = new_addr; +#endif + + return (unsigned long)new_addr; +} + void _dl_parse_lazy_relocation_information(struct dyn_elf *rpnt, unsigned long rel_addr, unsigned long rel_size) { @@ -115,6 +171,7 @@ int _dl_parse_relocation_information(struct dyn_elf *xpnt, got = (unsigned long *) tpnt->dynamic_info[DT_PLTGOT]; for (i = 0; i < rel_size; i++, rpnt++) { + char *symname = NULL; reloc_addr = (unsigned long *) (tpnt->loadaddr + (unsigned long) rpnt->r_offset); reloc_type = ELF_R_TYPE(rpnt->r_info); @@ -128,6 +185,16 @@ int _dl_parse_relocation_information(struct dyn_elf *xpnt, old_val = *reloc_addr; #endif + if (reloc_type == R_MIPS_JUMP_SLOT || reloc_type == R_MIPS_COPY) { + symname = strtab + symtab[symtab_index].st_name; + symbol_addr = (unsigned long)_dl_find_hash(symname, + tpnt->symbol_scope, + tpnt, + elf_machine_type_class(reloc_type)); + if (unlikely(!symbol_addr && ELF32_ST_BIND(symtab[symtab_index].st_info) != STB_WEAK)) + return 1; + } + switch (reloc_type) { #if _MIPS_SIM == _MIPS_SIM_ABI64 case (R_MIPS_64 << 8) | R_MIPS_REL32: @@ -148,6 +215,24 @@ int _dl_parse_relocation_information(struct dyn_elf *xpnt, *reloc_addr += (unsigned long) tpnt->loadaddr; } break; + case R_MIPS_JUMP_SLOT: + *reloc_addr = symbol_addr; + break; + case R_MIPS_COPY: + if (symbol_addr) { +#if defined (__SUPPORT_LD_DEBUG__) + if (_dl_debug_move) + _dl_dprintf(_dl_debug_file, + "\n%s move %d bytes from %x to %x", + symname, symtab[symtab_index].st_size, + symbol_addr, reloc_addr); +#endif + + _dl_memcpy((char *)reloc_addr, + (char *)symbol_addr, + symtab[symtab_index].st_size); + } + break; case R_MIPS_NONE: break; default: |