diff options
-rw-r--r-- | ldso/ldso/powerpc/elfinterp.c | 419 |
1 files changed, 178 insertions, 241 deletions
diff --git a/ldso/ldso/powerpc/elfinterp.c b/ldso/ldso/powerpc/elfinterp.c index 0aaf8f1ab..5d731e455 100644 --- a/ldso/ldso/powerpc/elfinterp.c +++ b/ldso/ldso/powerpc/elfinterp.c @@ -106,20 +106,20 @@ extern int _dl_linux_resolve(void); void _dl_init_got(unsigned long *plt,struct elf_resolve *tpnt) { - unsigned long target_addr = (unsigned long)_dl_linux_resolve; - unsigned int n_plt_entries; - unsigned long *tramp; - unsigned long data_words; - unsigned int rel_offset_words; + Elf32_Word *tramp; + Elf32_Word num_plt_entries; + Elf32_Word data_words; + Elf32_Word rel_offset_words; + Elf32_Word dlrr = (Elf32_Word) _dl_linux_resolve; //DPRINTF("init_got plt=%x, tpnt=%x\n", (unsigned long)plt,(unsigned long)tpnt); - n_plt_entries = tpnt->dynamic_info[DT_PLTRELSZ] / sizeof(ELF_RELOC); + num_plt_entries = tpnt->dynamic_info[DT_PLTRELSZ] / sizeof(ELF_RELOC); //DPRINTF("n_plt_entries %d\n",n_plt_entries); - rel_offset_words = PLT_DATA_START_WORDS(n_plt_entries); + rel_offset_words = PLT_DATA_START_WORDS(num_plt_entries); //DPRINTF("rel_offset_words %x\n",rel_offset_words); - data_words = (unsigned long)(plt + rel_offset_words); + data_words = (Elf32_Word) (plt + rel_offset_words); //DPRINTF("data_words %x\n",data_words); tpnt->data_words = data_words; @@ -132,23 +132,38 @@ void _dl_init_got(unsigned long *plt,struct elf_resolve *tpnt) /* [4] */ /* [5] */ + tramp = (Elf32_Word *) (plt + PLT_TRAMPOLINE_ENTRY_WORDS); - tramp = plt + PLT_TRAMPOLINE_ENTRY_WORDS; + /* For the long entries, subtract off data_words. */ tramp[0] = OPCODE_ADDIS_HI(11,11,-data_words); tramp[1] = OPCODE_ADDI(11,11,-data_words); + + /* Multiply index of entry by 3 (in r11). */ tramp[2] = OPCODE_SLWI(12,11,1); tramp[3] = OPCODE_ADD(11,12,11); - tramp[4] = OPCODE_LI(12,target_addr); - tramp[5] = OPCODE_ADDIS_HI(12,12,target_addr); - tramp[6] = OPCODE_MTCTR(12); - tramp[7] = OPCODE_LI(12,(unsigned long)tpnt); - tramp[8] = OPCODE_ADDIS_HI(12,12,(unsigned long)tpnt); - tramp[9] = OPCODE_BCTR(); - + if (dlrr <= 0x01fffffc || dlrr >= 0xfe000000) { + /* Load address of link map in r12. */ + tramp[4] = OPCODE_LI (12, (Elf32_Word) tpnt); + tramp[5] = OPCODE_ADDIS_HI (12, 12, (Elf32_Word) tpnt); + + /* Call _dl_runtime_resolve. */ + tramp[6] = OPCODE_BA (dlrr); + } else { + /* Get address of _dl_runtime_resolve in CTR. */ + tramp[4] = OPCODE_LI(12,dlrr); + tramp[5] = OPCODE_ADDIS_HI(12,12,dlrr); + tramp[6] = OPCODE_MTCTR(12); + + /* Load address of link map in r12. */ + tramp[7] = OPCODE_LI(12,(Elf32_Word) tpnt); + tramp[8] = OPCODE_ADDIS_HI(12,12,(Elf32_Word) tpnt); + + /* Call _dl_runtime_resolve. */ + tramp[9] = OPCODE_BCTR(); + } /* [16] unused */ /* [17] unused */ - /* instructions were modified */ PPC_DCBST(plt); PPC_DCBST(plt+4); PPC_DCBST(plt+8); @@ -156,31 +171,25 @@ void _dl_init_got(unsigned long *plt,struct elf_resolve *tpnt) PPC_DCBST(plt+16-1); PPC_SYNC; PPC_ICBI(plt); - PPC_ICBI(plt+4); /* glibc thinks this is not needed */ - PPC_ICBI(plt+8); /* glibc thinks this is not needed */ - PPC_ICBI(plt+12); /* glibc thinks this is not needed */ PPC_ICBI(plt+16-1); PPC_ISYNC; } unsigned long _dl_linux_resolver(struct elf_resolve *tpnt, int reloc_entry) { - int reloc_type; ELF_RELOC *this_reloc; char *strtab; Elf32_Sym *symtab; ELF_RELOC *rel_addr; int symtab_index; char *symname; - unsigned long insn_addr; - unsigned long *insns; - unsigned long new_addr; - unsigned long delta; + Elf32_Addr *reloc_addr; + Elf32_Addr finaladdr; + Elf32_Sword delta; rel_addr = (ELF_RELOC *) (tpnt->dynamic_info[DT_JMPREL] + tpnt->loadaddr); this_reloc = (void *)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 *) (tpnt->dynamic_info[DT_SYMTAB] + tpnt->loadaddr); @@ -190,80 +199,60 @@ unsigned long _dl_linux_resolver(struct elf_resolve *tpnt, int reloc_entry) #if defined (__SUPPORT_LD_DEBUG__) debug_sym(symtab,strtab,symtab_index); debug_reloc(symtab,strtab,this_reloc); -#endif - if (reloc_type != R_PPC_JMP_SLOT) { + if (ELF32_R_TYPE(this_reloc->r_info) != R_PPC_JMP_SLOT) { _dl_dprintf(2, "%s: Incorrect relocation type in jump relocation\n", _dl_progname); _dl_exit(1); }; +#endif /* Address of dump instruction to fix up */ - insn_addr = (unsigned long) tpnt->loadaddr + - (unsigned long) this_reloc->r_offset; + reloc_addr = (Elf32_Addr *) (tpnt->loadaddr + this_reloc->r_offset); #if defined (__SUPPORT_LD_DEBUG__) if(_dl_debug_reloc && _dl_debug_detail) - _dl_dprintf(_dl_debug_file, "\n\tResolving symbol %s %x --> ", symname, insn_addr); + _dl_dprintf(_dl_debug_file, "\n\tResolving symbol %s %x --> ", symname, (Elf32_Addr)reloc_addr); #endif /* Get the address of the GOT entry */ - new_addr = (unsigned long) _dl_find_hash( - strtab + symtab[symtab_index].st_name, - tpnt->symbol_scope, tpnt, resolver); - if (!new_addr) { - _dl_dprintf(2, "%s: can't resolve symbol '%s'\n", - _dl_progname, symname); + finaladdr = (Elf32_Addr) _dl_find_hash(strtab + symtab[symtab_index].st_name, + tpnt->symbol_scope, tpnt, resolver); + if (!finaladdr) { + _dl_dprintf(2, "%s: can't resolve symbol '%s'\n", _dl_progname, symname); _dl_exit(1); }; #if defined (__SUPPORT_LD_DEBUG__) if(_dl_debug_reloc && _dl_debug_detail) - _dl_dprintf(_dl_debug_file, "%x\n", new_addr); + _dl_dprintf(_dl_debug_file, "%x\n", finaladdr); #endif - - insns = (unsigned long *)insn_addr; - delta = new_addr - insn_addr; - - if(delta<<6>>6 == delta){ - insns[0] = OPCODE_B(delta); - }else if (new_addr <= 0x01fffffc || new_addr >= 0xfe000000){ - insns[0] = OPCODE_BA (new_addr); - }else{ + delta = finaladdr - (Elf32_Word)reloc_addr; + if (delta<<6>>6 == delta) { + *reloc_addr = OPCODE_B(delta); + } else if (finaladdr <= 0x01fffffc || finaladdr >= 0xfe000000) { + *reloc_addr = OPCODE_BA (finaladdr); + } else { /* Warning: we don't handle double-sized PLT entries */ - unsigned long plt_addr; - unsigned long *ptr; - int index; + Elf32_Word *plt, *data_words, index, offset; - plt_addr = (unsigned long)tpnt->dynamic_info[DT_PLTGOT] + - (unsigned long)tpnt->loadaddr; + plt = (Elf32_Word *)(tpnt->dynamic_info[DT_PLTGOT] + tpnt->loadaddr); + offset = reloc_addr - plt; + index = (offset - PLT_INITIAL_ENTRY_WORDS)/2; + data_words = (Elf32_Word *)tpnt->data_words; + reloc_addr += 1; - delta = PLT_LONGBRANCH_ENTRY_WORDS*4 - (insn_addr-plt_addr+4); - - index = (insn_addr - plt_addr - PLT_INITIAL_ENTRY_WORDS*4)/8; - - ptr = (unsigned long *)tpnt->data_words; - //DPRINTF("plt_addr=%x delta=%x index=%x ptr=%x\n", plt_addr, delta, index, ptr); - insns += 1; - - ptr[index] = new_addr; + data_words[index] = finaladdr; PPC_SYNC; - /* icache sync is not necessary, since this will be a data load */ - //PPC_DCBST(ptr+index); - //PPC_SYNC; - //PPC_ICBI(ptr+index); - //PPC_ISYNC; - - insns[0] = OPCODE_B(delta); - + *reloc_addr = OPCODE_B ((PLT_LONGBRANCH_ENTRY_WORDS - (offset+1)) * 4); } /* instructions were modified */ - PPC_DCBST(insns); + PPC_DCBST(reloc_addr); PPC_SYNC; - PPC_ICBI(insns); + PPC_ICBI(reloc_addr); PPC_ISYNC; - return new_addr; + return finaladdr; } static int @@ -335,74 +324,39 @@ static int _dl_do_lazy_reloc (struct elf_resolve *tpnt, struct dyn_elf *scope, ELF_RELOC *rpnt, Elf32_Sym *symtab, char *strtab) { - int reloc_type; - unsigned long reloc_addr; -#if defined (__SUPPORT_LD_DEBUG__) - unsigned long old_val; -#endif + Elf32_Addr *reloc_addr; + Elf32_Word *plt, index, offset; + (void)scope; (void)symtab; (void)strtab; - reloc_addr = (unsigned long)tpnt->loadaddr + (unsigned long) rpnt->r_offset; - reloc_type = ELF32_R_TYPE(rpnt->r_info); - + reloc_addr = (Elf32_Addr *)(tpnt->loadaddr + rpnt->r_offset); #if defined (__SUPPORT_LD_DEBUG__) - old_val = reloc_addr; -#endif - - switch (reloc_type) { - case R_PPC_NONE: - return 0; - break; - case R_PPC_JMP_SLOT: - { - int index; - unsigned long delta; - unsigned long *plt; - unsigned long *insns; - - plt = (unsigned long *)(tpnt->dynamic_info[DT_PLTGOT] + tpnt->loadaddr); - - delta = (unsigned long)(plt+PLT_TRAMPOLINE_ENTRY_WORDS+2) - (reloc_addr+4); - - index = (reloc_addr - (unsigned long)(plt+PLT_INITIAL_ENTRY_WORDS)) - /sizeof(unsigned long); - index /= 2; - //DPRINTF(" index %x delta %x\n",index,delta); - insns = (unsigned long *)reloc_addr; - insns[0] = OPCODE_LI(11,index*4); - insns[1] = OPCODE_B(delta); - break; - } - default: -#if 0 - _dl_dprintf(2, "%s: (LAZY) can't handle reloc type ", - _dl_progname); -#if defined (__SUPPORT_LD_DEBUG__) - _dl_dprintf(2, "%s ", _dl_reltypes[reloc_type]); -#endif - if (symtab_index) - _dl_dprintf(2, "'%s'\n", strtab + symtab[symtab_index].st_name); + if (ELF32_R_TYPE(rpnt->r_info) != R_PPC_JMP_SLOT) { + _dl_dprintf(2, "Reloc type != R_PPC_JMP_SLOT. Type is 0x%x\n", ELF32_R_TYPE(rpnt->r_info)); + return -1; + } #endif - //_dl_exit(1); - return -1; - }; + plt = (Elf32_Word *)(tpnt->dynamic_info[DT_PLTGOT] + tpnt->loadaddr); + offset = reloc_addr - plt; + index = (offset - PLT_INITIAL_ENTRY_WORDS)/2; + reloc_addr[0] = OPCODE_LI(11,index*4); + reloc_addr[1] = OPCODE_B((PLT_TRAMPOLINE_ENTRY_WORDS + 2 - (offset+1)) * 4); /* instructions were modified */ PPC_DCBST(reloc_addr); - PPC_DCBST(reloc_addr+4); + PPC_DCBST(reloc_addr+1); PPC_SYNC; PPC_ICBI(reloc_addr); - PPC_ICBI(reloc_addr+4); + PPC_ICBI(reloc_addr+1); PPC_ISYNC; #if defined (__SUPPORT_LD_DEBUG__) if(_dl_debug_reloc && _dl_debug_detail) - _dl_dprintf(_dl_debug_file, "\tpatched: %x ==> %x", old_val, reloc_addr); + _dl_dprintf(_dl_debug_file, "\tpatched: %x", reloc_addr); #endif return 0; - } static int @@ -412,147 +366,132 @@ _dl_do_reloc (struct elf_resolve *tpnt,struct dyn_elf *scope, int reloc_type; int symtab_index; char *symname; - unsigned long *reloc_addr; + Elf32_Addr *reloc_addr; + Elf32_Addr finaladdr; + unsigned long symbol_addr; #if defined (__SUPPORT_LD_DEBUG__) unsigned long old_val; #endif - - reloc_addr = (unsigned long *)(intptr_t) (tpnt->loadaddr + (unsigned long) rpnt->r_offset); + reloc_addr = (Elf32_Addr *)(intptr_t) (tpnt->loadaddr + (unsigned long) rpnt->r_offset); reloc_type = ELF32_R_TYPE(rpnt->r_info); + if (reloc_type == R_PPC_RELATIVE) { + *reloc_addr = tpnt->loadaddr + rpnt->r_addend; + return 0; + } + if (reloc_type == R_PPC_NONE || reloc_type == R_PPC_COPY) /* R_PPC_COPY is handled later */ + return 0; symtab_index = ELF32_R_SYM(rpnt->r_info); - symbol_addr = 0; symname = strtab + symtab[symtab_index].st_name; - if (symtab_index) { - - symbol_addr = (unsigned long) _dl_find_hash(symname, scope, - (reloc_type == R_PPC_JMP_SLOT ? tpnt : NULL), symbolrel); - - /* - * 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_GLOBAL) { + symbol_addr = (unsigned long) _dl_find_hash(symname, scope, + (reloc_type == R_PPC_JMP_SLOT ? tpnt : NULL), symbolrel); + /* + * 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_GLOBAL) { #if defined (__SUPPORT_LD_DEBUG__) - _dl_dprintf(2, "\tglobal symbol '%s' already defined in '%s'\n", - symname, tpnt->libname); + _dl_dprintf(2, "\tglobal symbol '%s' already defined in '%s', rel type: %s\n", + symname, tpnt->libname, _dl_reltypes(reloc_type)); #endif - return 0; - } + return 0; } - #if defined (__SUPPORT_LD_DEBUG__) old_val = *reloc_addr; #endif - switch (reloc_type) { - case R_PPC_NONE: - return 0; - break; - case R_PPC_REL24: -#if 0 - { - unsigned long delta = symbol_addr - (unsigned long)reloc_addr; - if(delta<<6>>6 != delta){ - _dl_dprintf(2,"R_PPC_REL24: Reloc out of range\n"); - _dl_exit(1); - } - *reloc_addr &= 0xfc000003; - *reloc_addr |= delta&0x03fffffc; - } - break; -#else - _dl_dprintf(2, "%s: symbol '%s' is type R_PPC_REL24\n\tCompile shared libraries with -fPIC!\n", - _dl_progname, symname); - _dl_exit(1); -#endif - case R_PPC_RELATIVE: - *reloc_addr = (unsigned long)tpnt->loadaddr + (unsigned long)rpnt->r_addend; - break; - case R_PPC_ADDR32: - case R_PPC_GLOB_DAT: - *reloc_addr = symbol_addr + (unsigned long)rpnt->r_addend; - break; - case R_PPC_ADDR16_HA: - /* XXX is this correct? */ - *(short *)reloc_addr += (symbol_addr+0x8000)>>16; - break; - case R_PPC_ADDR16_HI: - *(short *)reloc_addr += symbol_addr>>16; - break; - case R_PPC_ADDR16_LO: - *(short *)reloc_addr += symbol_addr; - break; - case R_PPC_JMP_SLOT: - { - unsigned long targ_addr = (unsigned long)*reloc_addr; - unsigned long delta = targ_addr - (unsigned long)reloc_addr; - if(delta<<6>>6 == delta){ - *reloc_addr = OPCODE_B(delta); - }else if (targ_addr <= 0x01fffffc || targ_addr >= 0xfe000000){ - *reloc_addr = OPCODE_BA (targ_addr); - }else{ - { - int index; - unsigned long delta2; - unsigned long *plt, *ptr; - plt = (unsigned long *)(tpnt->dynamic_info[DT_PLTGOT] + tpnt->loadaddr); - - delta2 = (unsigned long)(plt+PLT_LONGBRANCH_ENTRY_WORDS) - - (unsigned long)(reloc_addr+1); - - index = ((unsigned long)reloc_addr - - (unsigned long)(plt+PLT_INITIAL_ENTRY_WORDS)) - /sizeof(unsigned long); - index /= 2; - //DPRINTF(" index %x delta %x\n",index,delta2); - ptr = (unsigned long *)tpnt->data_words; - ptr[index] = targ_addr; - reloc_addr[0] = OPCODE_LI(11,index*4); - reloc_addr[1] = OPCODE_B(delta2); - - /* instructions were modified */ - PPC_DCBST(reloc_addr+1); - PPC_SYNC; - PPC_ICBI(reloc_addr+1); - } - } - break; - } - case R_PPC_COPY: - // handled later - return 0; - break; - default: -#if 0 - _dl_dprintf(2, "%s: can't handle reloc type ", _dl_progname); + finaladdr = (Elf32_Addr) (symbol_addr + rpnt->r_addend); + + switch (reloc_type) { + case R_PPC_ADDR32: + case R_PPC_GLOB_DAT: + *reloc_addr = finaladdr; + return 0; /* No code code modified */ + break; + case R_PPC_JMP_SLOT: + { + Elf32_Sword delta = finaladdr - (Elf32_Word)reloc_addr; + + if (delta<<6>>6 == delta) { + *reloc_addr = OPCODE_B(delta); + } else if (finaladdr <= 0x01fffffc || finaladdr >= 0xfe000000) { + *reloc_addr = OPCODE_BA (finaladdr); + } else { + /* Warning: we don't handle double-sized PLT entries */ + Elf32_Word *plt, *data_words, index, offset; + + plt = (Elf32_Word *)(tpnt->dynamic_info[DT_PLTGOT] + tpnt->loadaddr); + offset = reloc_addr - plt; + index = (offset - PLT_INITIAL_ENTRY_WORDS)/2; + data_words = (Elf32_Word *)tpnt->data_words; + + data_words[index] = finaladdr; + reloc_addr[0] = OPCODE_LI(11,index*4); + reloc_addr[1] = OPCODE_B((PLT_LONGBRANCH_ENTRY_WORDS - (offset+1)) * 4); + + /* instructions were modified */ + PPC_DCBST(reloc_addr+1); + PPC_SYNC; + PPC_ICBI(reloc_addr+1); + } + break; + } + case R_PPC_COPY: + /* This does not work yet, R_PPC_COPY is handled later, see if statemet above */ + if (symbol_addr) { #if defined (__SUPPORT_LD_DEBUG__) - _dl_dprintf(2, "%s ", _dl_reltypes[reloc_type]); + if(_dl_debug_move) + _dl_dprintf(_dl_debug_file,"\n%s move %x bytes from %x to %x", + symname, symtab[symtab_index].st_size, + symbol_addr, symtab[symtab_index].st_value); #endif - if (symtab_index) - _dl_dprintf(2, "'%s'\n", strtab + symtab[symtab_index].st_name); + _dl_memcpy((char *) reloc_addr, (char *) finaladdr, symtab[symtab_index].st_size); + } + return 0; /* No code code modified */ + break; + case R_PPC_ADDR16_HA: + *(short *)reloc_addr = (finaladdr + 0x8000)>>16; + break; + case R_PPC_ADDR16_HI: + *(short *)reloc_addr = finaladdr >> 16; + break; + case R_PPC_ADDR16_LO: + *(short *)reloc_addr = finaladdr; + break; + case R_PPC_REL24: + { + Elf32_Sword delta = finaladdr - (Elf32_Word)reloc_addr; + if(delta<<6>>6 != delta){ + _dl_dprintf(2, "%s: symbol '%s' R_PPC_REL24 is out of range.\n\tCompile shared libraries with -fPIC!\n", + _dl_progname, symname); + _dl_exit(1); + } + *reloc_addr = (*reloc_addr & 0xfc000003) | (delta & 0x3fffffc); + break; + } + default: + _dl_dprintf(2, "%s: can't handle reloc type ", _dl_progname); +#if defined (__SUPPORT_LD_DEBUG__) + _dl_dprintf(2, "%s ", _dl_reltypes[reloc_type]); #endif - //_dl_exit(1); - return -1; - }; - - /* instructions were modified */ - PPC_DCBST(reloc_addr); - PPC_SYNC; - PPC_ICBI(reloc_addr); - PPC_ISYNC; + if (symtab_index) + _dl_dprintf(2, "'%s'\n", strtab + symtab[symtab_index].st_name); + return -1; + }; + /* instructions were modified */ + PPC_DCBST(reloc_addr); + PPC_SYNC; + PPC_ICBI(reloc_addr); + PPC_ISYNC; #if defined (__SUPPORT_LD_DEBUG__) if(_dl_debug_reloc && _dl_debug_detail) _dl_dprintf(_dl_debug_file, "\tpatched: %x ==> %x @ %x", old_val, *reloc_addr, reloc_addr); #endif - return 0; } - /* This is done as a separate step, because there are cases where information is first copied and later initialized. This results in the wrong information being copied. Someone at Sun was complaining about @@ -615,5 +554,3 @@ int _dl_parse_copy_information(struct dyn_elf *xpnt, unsigned long rel_addr, (void) type; return _dl_parse(xpnt->dyn, xpnt->next, rel_addr, rel_size, _dl_do_copy); } - - |