2 * AcessOS 1 - Dynamic Loader
13 # define DEBUGS(v...) SysDebug("ld-acess - " v)
19 # define SUPPORT_ELF64
24 //static const char *csaDT_NAMES[] = {"DT_NULL", "DT_NEEDED", "DT_PLTRELSZ", "DT_PLTGOT", "DT_HASH", "DT_STRTAB", "DT_SYMTAB", "DT_RELA", "DT_RELASZ", "DT_RELAENT", "DT_STRSZ", "DT_SYMENT", "DT_INIT", "DT_FINI", "DT_SONAME", "DT_RPATH", "DT_SYMBOLIC", "DT_REL", "DT_RELSZ", "DT_RELENT", "DT_PLTREL", "DT_DEBUG", "DT_TEXTREL", "DT_JMPREL"};
25 static const char *csaR_NAMES[] = {"R_386_NONE", "R_386_32", "R_386_PC32", "R_386_GOT32", "R_386_PLT32", "R_386_COPY", "R_386_GLOB_DAT", "R_386_JMP_SLOT", "R_386_RELATIVE", "R_386_GOTOFF", "R_386_GOTPC", "R_386_LAST"};
29 void *ElfRelocate(void *Base, char **envp, const char *Filename);
30 int ElfGetSymbol(void *Base, const char *Name, void **Ret, size_t *Size);
31 void *Elf32Relocate(void *Base, char **envp, const char *Filename);
32 int Elf32GetSymbol(void *Base, const char *Name, void **Ret, size_t *Size);
34 void *Elf64Relocate(void *Base, char **envp, const char *Filename);
35 int Elf64GetSymbol(void *Base, const char *Name, void **Ret, size_t *Size);
37 Uint32 ElfHashString(const char *name);
41 * \fn int ElfRelocate(void *Base, char **envp, const char *Filename)
42 * \brief Relocates a loaded ELF Executable
44 void *ElfRelocate(void *Base, char **envp, const char *Filename)
46 Elf32_Ehdr *hdr = Base;
48 switch(hdr->e_ident[4])
51 return Elf32Relocate(Base, envp, Filename);
54 return Elf64Relocate(Base, envp, Filename);
57 SysDebug("ld-acess - ElfRelocate: Unknown file class %i", hdr->e_ident[4]);
63 * \fn int ElfGetSymbol(Uint Base, const char *name, void **ret)
65 int ElfGetSymbol(void *Base, const char *Name, void **ret, size_t *Size)
67 Elf32_Ehdr *hdr = Base;
69 switch(hdr->e_ident[4])
72 return Elf32GetSymbol(Base, Name, ret, Size);
75 return Elf64GetSymbol(Base, Name, ret, Size);
78 SysDebug("ld-acess - ElfRelocate: Unknown file class %i", hdr->e_ident[4]);
83 void *Elf32Relocate(void *Base, char **envp, const char *Filename)
85 Elf32_Ehdr *hdr = Base;
89 intptr_t iRealBase = -1;
93 Elf32_Rel *rel = NULL;
94 Elf32_Rela *rela = NULL;
95 Uint32 *pltgot = NULL;
97 int relSz=0, relEntSz=8;
98 int relaSz=0, relaEntSz=8;
99 int pltSz=0, pltType=0;
100 Elf32_Dyn *dynamicTab = NULL; // Dynamic Table Pointer
101 char *dynstrtab = NULL; // .dynamic String Table
102 Elf32_Sym *dynsymtab;
103 void (*do_relocate)(uint32_t t_info, uint32_t *ptr, Elf32_Addr addend, int Type, int bRela, const char *Sym);
105 DEBUGS("ElfRelocate: (Base=0x%x)", Base);
107 // Check magic header
110 // Parse Program Header to get Dynamic Table
111 phtab = Base + hdr->phoff;
112 iSegmentCount = hdr->phentcount;
113 for(i=0;i<iSegmentCount;i++)
115 // Determine linked base address
116 if(phtab[i].Type == PT_LOAD && iRealBase > phtab[i].VAddr)
117 iRealBase = phtab[i].VAddr;
119 // Find Dynamic Section
120 if(phtab[i].Type == PT_DYNAMIC) {
122 DEBUGS(" WARNING - elf_relocate: Multiple PT_DYNAMIC segments");
125 dynamicTab = (void *) (intptr_t) phtab[i].VAddr;
126 j = i; // Save Dynamic Table ID
130 // Page Align real base
132 DEBUGS(" elf_relocate: True Base = 0x%x, Compiled Base = 0x%x", Base, iRealBase);
134 // Adjust "Real" Base
135 iBaseDiff = (intptr_t)Base - iRealBase;
137 // hdr->entrypoint += iBaseDiff; // Adjust Entrypoint
139 // Check if a PT_DYNAMIC segement was found
141 SysDebug(" elf_relocate: No PT_DYNAMIC segment in image %p, returning", Base);
142 return (void *)(intptr_t)(hdr->entrypoint + iBaseDiff);
145 // Adjust Dynamic Table
146 dynamicTab = (void *)( (intptr_t)dynamicTab + iBaseDiff );
148 // === Get Symbol table and String Table ===
149 for( j = 0; dynamicTab[j].d_tag != DT_NULL; j++)
151 switch(dynamicTab[j].d_tag)
153 // --- Symbol Table ---
155 DEBUGS(" elf_relocate: DYNAMIC Symbol Table 0x%x (0x%x)",
156 dynamicTab[j].d_val, dynamicTab[j].d_val + iBaseDiff);
157 if(iBaseDiff != 0) dynamicTab[j].d_val += iBaseDiff;
158 dynsymtab = (void*)(intptr_t)dynamicTab[j].d_val;
160 // --- String Table ---
162 DEBUGS(" elf_relocate: DYNAMIC String Table 0x%x (0x%x)",
163 dynamicTab[j].d_val, dynamicTab[j].d_val + iBaseDiff);
164 if(iBaseDiff != 0) dynamicTab[j].d_val += iBaseDiff;
165 dynstrtab = (void*)(intptr_t)dynamicTab[j].d_val;
169 if(iBaseDiff != 0) dynamicTab[j].d_val += iBaseDiff;
170 iSymCount = ((Elf32_Word*)(intptr_t)dynamicTab[j].d_val)[1];
175 if(dynsymtab == NULL) {
176 SysDebug("ld-acess.so - WARNING: No Dynamic Symbol table in %p, returning", hdr);
177 return (void *)(intptr_t) (hdr->entrypoint + iBaseDiff);
180 // === Add to loaded list (can be imported now) ===
181 AddLoaded( Filename, Base );
183 // === Parse Relocation Data ===
184 DEBUGS(" elf_relocate: dynamicTab = 0x%x", dynamicTab);
185 for( j = 0; dynamicTab[j].d_tag != DT_NULL; j++)
187 switch(dynamicTab[j].d_tag)
189 // --- Shared Library Name ---
191 DEBUGS(" elf_relocate: .so Name '%s'", dynstrtab+dynamicTab[j].d_val);
193 // --- Needed Library ---
195 libPath = dynstrtab + dynamicTab[j].d_val;
196 DEBUGS(" Required Library '%s'", libPath);
197 if(LoadLibrary(libPath, NULL, envp) == 0) {
199 DEBUGS(" elf_relocate: Unable to load '%s'", libPath);
201 SysDebug("Unable to load required library '%s'", libPath);
205 DEBUGS(" Lib loaded");
208 case DT_PLTGOT: pltgot = (void*)(iBaseDiff + dynamicTab[j].d_val); break;
209 case DT_JMPREL: plt = (void*)(iBaseDiff + dynamicTab[j].d_val); break;
210 case DT_PLTREL: pltType = dynamicTab[j].d_val; break;
211 case DT_PLTRELSZ: pltSz = dynamicTab[j].d_val; break;
213 // --- Relocation ---
214 case DT_REL: rel = (void*)(iBaseDiff + dynamicTab[j].d_val); break;
215 case DT_RELSZ: relSz = dynamicTab[j].d_val; break;
216 case DT_RELENT: relEntSz = dynamicTab[j].d_val; break;
217 case DT_RELA: rela = (void*)(iBaseDiff + dynamicTab[j].d_val); break;
218 case DT_RELASZ: relaSz = dynamicTab[j].d_val; break;
219 case DT_RELAENT: relaEntSz = dynamicTab[j].d_val; break;
221 // --- Symbol Table ---
223 // --- Hash Table ---
225 // --- String Table ---
231 if(dynamicTab[j].d_tag > DT_JMPREL) continue;
232 //DEBUGS(" elf_relocate: %i-%i = %s,0x%x",
233 // i,j, csaDT_NAMES[dynamicTab[j].d_tag],dynamicTab[j].d_val);
238 DEBUGS(" elf_relocate: Beginning Relocation");
240 void elf_doRelocate_386(uint32_t r_info, uint32_t *ptr, Elf32_Addr addend, int type, int bRela, const char *Sym)
245 // Standard 32 Bit Relocation (S+A)
247 val = (intptr_t) GetSymbol(Sym, NULL);
248 DEBUGS(" elf_doRelocate: R_386_32 *0x%x += 0x%x('%s')",
253 // 32 Bit Relocation wrt. Offset (S+A-P)
255 DEBUGS(" elf_doRelocate: '%s'", Sym);
256 val = (intptr_t) GetSymbol(Sym, NULL);
257 DEBUGS(" elf_doRelocate: R_386_PC32 *0x%x = 0x%x + 0x%x - 0x%x",
258 ptr, *ptr, val, (intptr_t)ptr );
259 *ptr = val + addend - (intptr_t)ptr;
260 //*ptr = val + addend - ((Uint)ptr - iBaseDiff);
263 // Absolute Value of a symbol (S)
266 DEBUGS(" elf_doRelocate: '%s'", Sym);
267 val = (intptr_t) GetSymbol( Sym, NULL );
268 DEBUGS(" elf_doRelocate: %s *0x%x = 0x%x", csaR_NAMES[type], ptr, val);
272 // Base Address (B+A)
274 DEBUGS(" elf_doRelocate: R_386_RELATIVE *0x%x = 0x%x + 0x%x", ptr, iBaseDiff, addend);
275 *ptr = iBaseDiff + addend;
280 void *src = GetSymbol(Sym, &size);
281 DEBUGS(" elf_doRelocate_386: R_386_COPY (%p, %p, %i)", ptr, src, size);
282 memcpy(ptr, src, size);
286 SysDebug("elf_doRelocate_386: Unknown relocation %i", type);
291 void elf_doRelocate_arm(uint32_t r_info, uint32_t *ptr, Elf32_Addr addend, int type, int bRela, const char *Sym)
298 DEBUGS(" elf_doRelocate_arm: R_ARM_GLOB_DAT %p (%s + %x)", ptr, Sym, addend);
299 val = (intptr_t)GetSymbol(Sym, NULL);
302 case R_ARM_JUMP_SLOT:
303 if(!bRela) addend = 0;
304 DEBUGS(" elf_doRelocate_arm: R_ARM_JUMP_SLOT %p (%s + %x)", ptr, Sym, addend);
305 val = (intptr_t)GetSymbol(Sym, NULL);
309 SysDebug("elf_doRelocate_arm: Unknown Relocation, %i", type);
314 void _doRelocate(uint32_t r_info, uint32_t *ptr, int bRela, Elf32_Addr addend)
316 int type = ELF32_R_TYPE(r_info);
317 int sym = ELF32_R_SYM(r_info);
318 const char *symname = dynstrtab + dynsymtab[sym].nameOfs;
319 do_relocate(r_info, ptr, addend, type, bRela, symname);
325 do_relocate = elf_doRelocate_386;
328 do_relocate = elf_doRelocate_arm;
331 SysDebug("Elf32Relocate: Unknown machine type %i", hdr->machine);
335 // Parse Relocation Entries
339 DEBUGS(" elf_relocate: rel=0x%x, relSz=0x%x, relEntSz=0x%x", rel, relSz, relEntSz);
340 j = relSz / relEntSz;
341 for( i = 0; i < j; i++ )
343 //DEBUGS(" Rel %i: 0x%x+0x%x", i, iBaseDiff, rel[i].r_offset);
344 ptr = (void*)(iBaseDiff + rel[i].r_offset);
345 _doRelocate(rel[i].r_info, ptr, 0, *ptr);
348 // Parse Relocation Entries
352 DEBUGS(" elf_relocate: rela=0x%x, relaSz=0x%x, relaEntSz=0x%x", rela, relaSz, relaEntSz);
353 j = relaSz / relaEntSz;
354 for( i = 0; i < j; i++ )
356 ptr = (void*)(iBaseDiff + rela[i].r_offset);
357 _doRelocate(rel[i].r_info, ptr, 1, rela[i].r_addend);
361 // === Process PLT (Procedure Linkage Table) ===
365 DEBUGS(" elf_relocate: Relocate PLT, plt=0x%x", plt);
366 if(pltType == DT_REL)
368 Elf32_Rel *pltRel = plt;
369 j = pltSz / sizeof(Elf32_Rel);
370 DEBUGS(" elf_relocate: PLT Reloc Type = Rel, %i entries", j);
373 ptr = (void*)(iBaseDiff + pltRel[i].r_offset);
374 _doRelocate(pltRel[i].r_info, ptr, 0, *ptr);
379 Elf32_Rela *pltRela = plt;
380 j = pltSz / sizeof(Elf32_Rela);
381 DEBUGS(" elf_relocate: PLT Reloc Type = Rela, %i entries", j);
384 ptr = (void*)(iRealBase + pltRela[i].r_offset);
385 _doRelocate(pltRela[i].r_info, ptr, 1, pltRela[i].r_addend);
390 DEBUGS("ElfRelocate: RETURN 0x%x to %p", hdr->entrypoint + iBaseDiff, __builtin_return_address(0));
391 return (void*)(intptr_t)( hdr->entrypoint + iBaseDiff );
394 int Elf32GetSymbol(void *Base, const char *Name, void **ret, size_t *Size)
396 Elf32_Ehdr *hdr = Base;
404 const char *dynstrtab;
405 uintptr_t iBaseDiff = -1;
407 Elf32_Dyn *dynTab = NULL;
410 phtab = (void*)( Base + hdr->phoff );
411 for( i = 0; i < hdr->phentcount; i ++ )
413 if(phtab[i].Type == PT_LOAD && iBaseDiff > phtab[i].VAddr)
414 iBaseDiff = phtab[i].VAddr;
415 if( phtab[i].Type == PT_DYNAMIC ) {
416 dynTab = (void*)(intptr_t)phtab[i].VAddr;
420 SysDebug("ERROR - Unable to find DYNAMIC segment in %p", Base);
423 iBaseDiff = (intptr_t)Base - iBaseDiff; // Make iBaseDiff actually the diff
424 dynTab = (void*)( (intptr_t)dynTab + iBaseDiff );
425 for( i = 0; dynTab[i].d_tag != DT_NULL; i++)
427 switch(dynTab[i].d_tag)
429 // --- Symbol Table ---
431 symtab = (void*)(intptr_t) dynTab[i].d_val; // Rebased in Relocate
434 dynstrtab = (void*)(intptr_t) dynTab[i].d_val;
438 pBuckets = (void*)(intptr_t) dynTab[i].d_val;
443 nbuckets = pBuckets[0];
444 iSymCount = pBuckets[1];
445 pBuckets = &pBuckets[2];
446 pChains = &pBuckets[ nbuckets ];
449 iNameHash = ElfHashString(Name);
450 iNameHash %= nbuckets;
453 i = pBuckets[ iNameHash ];
454 if(symtab[i].shndx != SHN_UNDEF && strcmp(dynstrtab + symtab[i].nameOfs, Name) == 0) {
455 *ret = (void*) (intptr_t) symtab[ i ].value + iBaseDiff;
456 if(Size) *Size = symtab[i].size;
460 while(pChains[i] != STN_UNDEF)
463 if(symtab[i].shndx != SHN_UNDEF && strcmp(dynstrtab + symtab[ i ].nameOfs, Name) == 0) {
464 *ret = (void*)(intptr_t)symtab[ i ].value + iBaseDiff;
465 if(Size) *Size = symtab[i].size;
474 void *Elf64Relocate(void *Base, char **envp, const char *Filename)
477 Elf64_Ehdr *hdr = Base;
480 Elf64_Addr compiledBase = -1, baseDiff;
481 Elf64_Sym *symtab = NULL;
483 Elf64_Word *hashtab = NULL;
484 Elf64_Rel *rel = NULL;
486 Elf64_Rela *rela = NULL;
489 int plt_size = 0, plt_type = 0;
491 DEBUGS("Elf64Relocate: hdr = {");
492 DEBUGS("Elf64Relocate: e_ident = '%.16s'", hdr->e_ident);
493 DEBUGS("Elf64Relocate: e_type = 0x%x", hdr->e_type);
494 DEBUGS("Elf64Relocate: e_machine = 0x%x", hdr->e_machine);
495 DEBUGS("Elf64Relocate: e_version = 0x%x", hdr->e_version);
496 DEBUGS("Elf64Relocate: e_entry = %p", hdr->e_entry);
497 DEBUGS("Elf64Relocate: e_phoff = 0x%llx", hdr->e_phoff);
498 DEBUGS("Elf64Relocate: e_shoff = 0x%llx", hdr->e_shoff);
499 DEBUGS("Elf64Relocate: e_flags = 0x%x", hdr->e_flags);
500 DEBUGS("Elf64Relocate: e_ehsize = 0x%x", hdr->e_ehsize);
501 DEBUGS("Elf64Relocate: e_phentsize = 0x%x", hdr->e_phentsize);
502 DEBUGS("Elf64Relocate: e_phnum = %i", hdr->e_phnum);
504 // Scan for the dynamic table (and find the compiled base)
505 phtab = Base + hdr->e_phoff;
506 for( i = 0; i < hdr->e_phnum; i ++ )
508 if(phtab[i].p_type == PT_DYNAMIC)
509 dyntab = (void *)(intptr_t)phtab[i].p_vaddr;
510 if(phtab[i].p_type == PT_LOAD && compiledBase > phtab[i].p_vaddr)
511 compiledBase = phtab[i].p_vaddr;
514 baseDiff = (Elf64_Addr)Base - compiledBase;
516 DEBUGS("baseDiff = %p", baseDiff);
519 SysDebug(" Elf64Relocate: No PT_DYNAMIC segment in image %p, returning", Base);
520 return (void *)(hdr->e_entry + baseDiff);
523 dyntab = (void *)((Elf64_Addr)dyntab + baseDiff);
525 // Parse the dynamic table (first pass)
526 // - Search for String, Symbol and Hash tables
527 for(i = 0; dyntab[i].d_tag != DT_NULL; i ++)
529 switch(dyntab[i].d_tag)
532 dyntab[i].d_un.d_ptr += baseDiff;
533 symtab = (void *)dyntab[i].d_un.d_ptr;
536 dyntab[i].d_un.d_ptr += baseDiff;
537 strtab = (void *)dyntab[i].d_un.d_ptr;
540 dyntab[i].d_un.d_ptr += baseDiff;
541 hashtab = (void *)dyntab[i].d_un.d_ptr;
546 if( !symtab || !strtab || !hashtab ) {
547 SysDebug("ld-acess - Elf64Relocate: Missing Symbol, string or hash table");
551 // Ready for symbol use
552 AddLoaded( Filename, Base );
554 // Second pass on dynamic table
555 for(i = 0; dyntab[i].d_tag != DT_NULL; i ++)
557 DEBUGS("dyntab[%i].d_tag = %i", i, dyntab[i].d_tag);
558 switch(dyntab[i].d_tag)
560 case DT_SONAME: break;
563 char *libPath = strtab + dyntab[i].d_un.d_val;
564 DEBUGS("Elf64Relocate: libPath = '%s'", libPath);
565 if(LoadLibrary(libPath, NULL, envp) == 0) {
566 SysDebug("ld-acess - Elf64Relocate: Unable to load '%s'", libPath);
571 // Relocation entries
573 dyntab[i].d_un.d_ptr += baseDiff;
574 rel = (void *)dyntab[i].d_un.d_ptr;
577 rel_count = dyntab[i].d_un.d_val / sizeof(Elf64_Rel);
580 if( dyntab[i].d_un.d_val != sizeof(Elf64_Rel) ) {
581 SysDebug("ld-acess - Elf64Relocate: DT_RELENT(%i) != sizeof(Elf64_Rel)(%i)",
582 dyntab[i].d_un.d_val, sizeof(Elf64_Rel));
587 dyntab[i].d_un.d_ptr += baseDiff;
588 rela = (void *)dyntab[i].d_un.d_ptr;
591 rela_count = dyntab[i].d_un.d_val / sizeof(Elf64_Rela);
594 if( dyntab[i].d_un.d_val != sizeof(Elf64_Rela) ) {
595 SysDebug("ld-acess - Elf64Relocate: DT_RELAENT(%i) != sizeof(Elf64_Rela)(%i)",
596 dyntab[i].d_un.d_val, sizeof(Elf64_Rela));
601 dyntab[i].d_un.d_ptr += baseDiff;
602 pltrel = (void *)dyntab[i].d_un.d_ptr;
605 plt_type = dyntab[i].d_un.d_val;
608 plt_size = dyntab[i].d_un.d_val;
613 // Relocation function
614 void _Elf64DoReloc(Elf64_Xword r_info, void *ptr, Elf64_Sxword addend)
616 int sym = ELF64_R_SYM(r_info);
617 int type = ELF64_R_TYPE(r_info);
618 const char *symname = strtab + symtab[sym].st_name;
624 *(uint64_t*)ptr = (uint64_t)GetSymbol(symname, NULL) + addend;
626 case R_X86_64_COPY: {
628 void *sym = GetSymbol(symname, &size);
629 memcpy(ptr, sym, size);
631 case R_X86_64_GLOB_DAT:
632 *(uint64_t*)ptr = (uint64_t)GetSymbol(symname, NULL);
634 case R_X86_64_JUMP_SLOT:
635 *(uint64_t*)ptr = (uint64_t)GetSymbol(symname, NULL);
637 case R_X86_64_RELATIVE:
638 *(uint64_t*)ptr = (intptr_t)Base + addend;
641 SysDebug("ld-acess - _Elf64DoReloc: Unknown relocation type %i", type);
648 DEBUGS("rel_count = %i", rel_count);
649 for( i = 0; i < rel_count; i ++ )
651 uint64_t *ptr = (void *)( rel[i].r_offset + baseDiff );
652 _Elf64DoReloc( rel[i].r_info, ptr, *ptr);
658 DEBUGS("rela_count = %i", rela_count);
659 for( i = 0; i < rela_count; i ++ )
661 _Elf64DoReloc( rela[i].r_info, (void *)( rela[i].r_offset + baseDiff ), rela[i].r_addend );
665 if( pltrel && plt_type )
667 if( plt_type == DT_REL ) {
668 Elf64_Rel *plt = pltrel;
669 int count = plt_size / sizeof(Elf64_Rel);
670 DEBUGS("plt rel count = %i", count);
671 for( i = 0; i < count; i ++ )
673 uint64_t *ptr = (void *)( plt[i].r_offset + baseDiff );
674 _Elf64DoReloc( plt[i].r_info, ptr, *ptr);
678 Elf64_Rela *plt = pltrel;
679 int count = plt_size / sizeof(Elf64_Rela);
680 DEBUGS("plt rela count = %i", count);
681 for( i = 0; i < count; i ++ )
683 _Elf64DoReloc( plt[i].r_info, (void *)(plt[i].r_offset + baseDiff), plt[i].r_addend);
688 DEBUGS("Elf64Relocate: Relocations done, return %p", (void *)(hdr->e_entry + baseDiff));
689 return (void *)(hdr->e_entry + baseDiff);
692 int Elf64GetSymbol(void *Base, const char *Name, void **Ret, size_t *Size)
694 Elf64_Ehdr *hdr = Base;
699 Elf64_Word *pBuckets;
702 const char *dynstrtab;
703 uintptr_t iBaseDiff = -1;
709 // Catch the current executable
713 Elf64_Dyn *dynTab = NULL;
717 phtab = (void*)( Base + hdr->e_phoff );
718 for( i = 0; i < hdr->e_phnum; i ++ )
720 if(phtab[i].p_type == PT_LOAD && iBaseDiff > phtab[i].p_vaddr)
721 iBaseDiff = phtab[i].p_vaddr;
722 if( phtab[i].p_type == PT_DYNAMIC ) {
723 dynTab = (void*)(intptr_t)phtab[i].p_vaddr;
727 SysDebug("ERROR - Unable to find DYNAMIC segment in %p", Base);
730 iBaseDiff = (intptr_t)Base - iBaseDiff; // Make iBaseDiff actually the diff
731 dynTab = (void*)( (intptr_t)dynTab + iBaseDiff );
733 for( j = 0; dynTab[j].d_tag != DT_NULL; j++)
735 switch(dynTab[j].d_tag)
737 // --- Symbol Table ---
739 symtab = (void*)(intptr_t) dynTab[j].d_un.d_val; // Rebased in Relocate
742 dynstrtab = (void*)(intptr_t) dynTab[j].d_un.d_val;
746 pBuckets = (void*)(intptr_t) dynTab[j].d_un.d_val;
752 nbuckets = pBuckets[0];
753 iSymCount = pBuckets[1];
754 pBuckets = &pBuckets[2];
755 pChains = &pBuckets[ nbuckets ];
758 iNameHash = ElfHashString(Name);
759 iNameHash %= nbuckets;
762 i = pBuckets[ iNameHash ];
763 if(symtab[i].st_shndx != SHN_UNDEF && strcmp(dynstrtab + symtab[i].st_name, Name) == 0) {
764 *Ret = (void*) (intptr_t) symtab[i].st_value + iBaseDiff;
765 if(Size) *Size = symtab[i].st_size;
766 DEBUGS("%s = %p", Name, *Ret);
770 while(pChains[i] != STN_UNDEF)
773 if(symtab[i].st_shndx != SHN_UNDEF && strcmp(dynstrtab + symtab[i].st_name, Name) == 0) {
774 *Ret = (void*)(intptr_t)symtab[i].st_value + iBaseDiff;
775 if(Size) *Size = symtab[i].st_size;
776 DEBUGS("%s = %p", Name, *Ret);
786 Uint32 ElfHashString(const char *name)
791 h = (h << 4) + *(Uint8*)name++;
792 if( (g = h & 0xf0000000) )