2 * AcessOS 1 - Dynamic Loader
13 # define DEBUGS(v...) SysDebug("ld-acess - " v)
20 //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"};
21 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"};
25 void *ElfRelocate(void *Base, char **envp, const char *Filename);
26 void *Elf32Relocate(void *Base, char **envp, const char *Filename);
27 void *Elf64Relocate(void *Base, char **envp, const char *Filename);
28 int ElfGetSymbol(void *Base, const char *Name, void **Ret);
29 int Elf64GetSymbol(void *Base, const char *Name, void **Ret);
30 int Elf32GetSymbol(void *Base, const char *Name, void **Ret);
31 Uint32 ElfHashString(const char *name);
35 * \fn int ElfRelocate(void *Base, char **envp, const char *Filename)
36 * \brief Relocates a loaded ELF Executable
38 void *ElfRelocate(void *Base, char **envp, const char *Filename)
40 Elf32_Ehdr *hdr = Base;
42 switch(hdr->e_ident[4])
45 return Elf32Relocate(Base, envp, Filename);
47 return Elf64Relocate(Base, envp, Filename);
49 SysDebug("ld-acess - ElfRelocate: Unknown file class %i", hdr->e_ident[4]);
54 void *Elf64Relocate(void *Base, char **envp, const char *Filename)
57 Elf64_Ehdr *hdr = Base;
60 Elf64_Addr compiledBase = -1, baseDiff;
61 Elf64_Sym *symtab = NULL;
63 Elf64_Word *hashtab = NULL;
64 Elf64_Rel *rel = NULL;
66 Elf64_Rela *rela = NULL;
69 int plt_size = 0, plt_type = 0;
71 DEBUGS("Elf64Relocate: hdr = {");
72 DEBUGS("Elf64Relocate: e_ident = '%.16s'", hdr->e_ident);
73 DEBUGS("Elf64Relocate: e_type = 0x%x", hdr->e_type);
74 DEBUGS("Elf64Relocate: e_machine = 0x%x", hdr->e_machine);
75 DEBUGS("Elf64Relocate: e_version = 0x%x", hdr->e_version);
76 DEBUGS("Elf64Relocate: e_entry = %p", hdr->e_entry);
77 DEBUGS("Elf64Relocate: e_phoff = 0x%llx", hdr->e_phoff);
78 DEBUGS("Elf64Relocate: e_shoff = 0x%llx", hdr->e_shoff);
79 DEBUGS("Elf64Relocate: e_flags = 0x%x", hdr->e_flags);
80 DEBUGS("Elf64Relocate: e_ehsize = 0x%x", hdr->e_ehsize);
81 DEBUGS("Elf64Relocate: e_phentsize = 0x%x", hdr->e_phentsize);
82 DEBUGS("Elf64Relocate: e_phnum = %i", hdr->e_phnum);
84 // Scan for the dynamic table (and find the compiled base)
85 phtab = Base + hdr->e_phoff;
86 for( i = 0; i < hdr->e_phnum; i ++ )
88 if(phtab[i].p_type == PT_DYNAMIC)
89 dyntab = (void *)(intptr_t)phtab[i].p_vaddr;
90 if(phtab[i].p_type == PT_LOAD && compiledBase > phtab[i].p_vaddr)
91 compiledBase = phtab[i].p_vaddr;
94 baseDiff = (Elf64_Addr)Base - compiledBase;
96 DEBUGS("baseDiff = %p", baseDiff);
99 SysDebug(" Elf64Relocate: No PT_DYNAMIC segment in image %p, returning", Base);
100 return (void *)(hdr->e_entry + baseDiff);
103 dyntab = (void *)((Elf64_Addr)dyntab + baseDiff);
105 // Parse the dynamic table (first pass)
106 // - Search for String, Symbol and Hash tables
107 for(i = 0; dyntab[i].d_tag != DT_NULL; i ++)
109 switch(dyntab[i].d_tag)
112 dyntab[i].d_un.d_ptr += baseDiff;
113 symtab = (void *)dyntab[i].d_un.d_ptr;
116 dyntab[i].d_un.d_ptr += baseDiff;
117 strtab = (void *)dyntab[i].d_un.d_ptr;
120 dyntab[i].d_un.d_ptr += baseDiff;
121 hashtab = (void *)dyntab[i].d_un.d_ptr;
126 if( !symtab || !strtab || !hashtab ) {
127 SysDebug("ld-acess - Elf64Relocate: Missing Symbol, string or hash table");
131 // Ready for symbol use
132 AddLoaded( Filename, Base );
134 // Second pass on dynamic table
135 for(i = 0; dyntab[i].d_tag != DT_NULL; i ++)
137 DEBUGS("dyntab[%i].d_tag = %i", i, dyntab[i].d_tag);
138 switch(dyntab[i].d_tag)
140 case DT_SONAME: break;
143 char *libPath = strtab + dyntab[i].d_un.d_val;
144 DEBUGS("Elf64Relocate: libPath = '%s'", libPath);
145 if(LoadLibrary(libPath, NULL, envp) == 0) {
146 SysDebug("ld-acess - Elf64Relocate: Unable to load '%s'", libPath);
151 // Relocation entries
153 dyntab[i].d_un.d_ptr += baseDiff;
154 rel = (void *)dyntab[i].d_un.d_ptr;
157 rel_count = dyntab[i].d_un.d_val / sizeof(Elf64_Rel);
160 if( dyntab[i].d_un.d_val != sizeof(Elf64_Rel) ) {
161 SysDebug("ld-acess - Elf64Relocate: DT_RELENT(%i) != sizeof(Elf64_Rel)(%i)",
162 dyntab[i].d_un.d_val, sizeof(Elf64_Rel));
167 dyntab[i].d_un.d_ptr += baseDiff;
168 rela = (void *)dyntab[i].d_un.d_ptr;
171 rela_count = dyntab[i].d_un.d_val / sizeof(Elf64_Rela);
174 if( dyntab[i].d_un.d_val != sizeof(Elf64_Rela) ) {
175 SysDebug("ld-acess - Elf64Relocate: DT_RELAENT(%i) != sizeof(Elf64_Rela)(%i)",
176 dyntab[i].d_un.d_val, sizeof(Elf64_Rela));
181 dyntab[i].d_un.d_ptr += baseDiff;
182 pltrel = (void *)dyntab[i].d_un.d_ptr;
185 plt_type = dyntab[i].d_un.d_val;
188 plt_size = dyntab[i].d_un.d_val;
193 // Relocation function
194 void _Elf64DoReloc(Elf64_Xword r_info, void *ptr, Elf64_Sxword addend)
196 int sym = ELF64_R_SYM(r_info);
197 int type = ELF64_R_TYPE(r_info);
198 const char *symname = strtab + symtab[sym].st_name;
204 *(uint64_t*)ptr = (uint64_t)GetSymbol(symname) + addend;
208 case R_X86_64_GLOB_DAT:
209 *(uint64_t*)ptr = (uint64_t)GetSymbol(symname);
211 case R_X86_64_JUMP_SLOT:
212 *(uint64_t*)ptr = (uint64_t)GetSymbol(symname);
215 SysDebug("ld-acess - _Elf64DoReloc: Unknown relocation type %i", type);
222 DEBUGS("rel_count = %i", rel_count);
223 for( i = 0; i < rel_count; i ++ )
225 uint64_t *ptr = (void *)( rel[i].r_offset + baseDiff );
226 _Elf64DoReloc( rel[i].r_info, ptr, *ptr);
232 DEBUGS("rela_count = %i", rela_count);
233 for( i = 0; i < rela_count; i ++ )
235 _Elf64DoReloc( rela[i].r_info, (void *)( rela[i].r_offset + baseDiff ), rela[i].r_addend );
239 if( pltrel && plt_type )
241 if( plt_type == DT_REL ) {
242 Elf64_Rel *plt = pltrel;
243 int count = plt_size / sizeof(Elf64_Rel);
244 DEBUGS("plt rel count = %i", count);
245 for( i = 0; i < count; i ++ )
247 uint64_t *ptr = (void *)( plt[i].r_offset + baseDiff );
248 _Elf64DoReloc( plt[i].r_info, ptr, *ptr);
252 Elf64_Rela *plt = pltrel;
253 int count = plt_size / sizeof(Elf64_Rela);
254 DEBUGS("plt rela count = %i", count);
255 for( i = 0; i < count; i ++ )
257 _Elf64DoReloc( plt[i].r_info, (void *)(plt[i].r_offset + baseDiff), plt[i].r_addend);
262 DEBUGS("Elf64Relocate: Relocations done, return %p", (void *)(hdr->e_entry + baseDiff));
263 return (void *)(hdr->e_entry + baseDiff);
266 void *Elf32Relocate(void *Base, char **envp, const char *Filename)
268 Elf32_Ehdr *hdr = Base;
270 int i, j; // Counters
272 intptr_t iRealBase = -1;
276 Elf32_Rel *rel = NULL;
277 Elf32_Rela *rela = NULL;
278 Uint32 *pltgot = NULL;
280 int relSz=0, relEntSz=8;
281 int relaSz=0, relaEntSz=8;
282 int pltSz=0, pltType=0;
283 Elf32_Dyn *dynamicTab = NULL; // Dynamic Table Pointer
284 char *dynstrtab = NULL; // .dynamic String Table
285 Elf32_Sym *dynsymtab;
287 DEBUGS("ElfRelocate: (Base=0x%x)", Base);
289 // Check magic header
292 // Parse Program Header to get Dynamic Table
293 phtab = Base + hdr->phoff;
294 iSegmentCount = hdr->phentcount;
295 for(i=0;i<iSegmentCount;i++)
297 // Determine linked base address
298 if(phtab[i].Type == PT_LOAD && iRealBase > phtab[i].VAddr)
299 iRealBase = phtab[i].VAddr;
301 // Find Dynamic Section
302 if(phtab[i].Type == PT_DYNAMIC) {
304 DEBUGS(" WARNING - elf_relocate: Multiple PT_DYNAMIC segments");
307 dynamicTab = (void *) (intptr_t) phtab[i].VAddr;
308 j = i; // Save Dynamic Table ID
312 // Page Align real base
314 DEBUGS(" elf_relocate: True Base = 0x%x, Compiled Base = 0x%x", Base, iRealBase);
316 // Adjust "Real" Base
317 iBaseDiff = (intptr_t)Base - iRealBase;
319 // hdr->entrypoint += iBaseDiff; // Adjust Entrypoint
321 // Check if a PT_DYNAMIC segement was found
323 SysDebug(" elf_relocate: No PT_DYNAMIC segment in image %p, returning", Base);
324 return (void *)(intptr_t)(hdr->entrypoint + iBaseDiff);
327 // Adjust Dynamic Table
328 dynamicTab = (void *)( (intptr_t)dynamicTab + iBaseDiff );
330 // === Get Symbol table and String Table ===
331 for( j = 0; dynamicTab[j].d_tag != DT_NULL; j++)
333 switch(dynamicTab[j].d_tag)
335 // --- Symbol Table ---
337 DEBUGS(" elf_relocate: DYNAMIC Symbol Table 0x%x (0x%x)",
338 dynamicTab[j].d_val, dynamicTab[j].d_val + iBaseDiff);
339 if(iBaseDiff != 0) dynamicTab[j].d_val += iBaseDiff;
340 dynsymtab = (void*)(dynamicTab[j].d_val);
341 // hdr->misc.SymTable = dynamicTab[j].d_val; // Saved in unused bytes of ident
343 // --- String Table ---
345 DEBUGS(" elf_relocate: DYNAMIC String Table 0x%x (0x%x)",
346 dynamicTab[j].d_val, dynamicTab[j].d_val + iBaseDiff);
347 if(iBaseDiff != 0) dynamicTab[j].d_val += iBaseDiff;
348 dynstrtab = (void*)(dynamicTab[j].d_val);
352 if(iBaseDiff != 0) dynamicTab[j].d_val += iBaseDiff;
353 iSymCount = ((Elf32_Word*)(dynamicTab[j].d_val))[1];
354 // hdr->misc.HashTable = dynamicTab[j].d_val; // Saved in unused bytes of ident
359 if(dynsymtab == NULL) {
360 SysDebug("ld-acess.so - WARNING: No Dynamic Symbol table in %p, returning", hdr);
361 return (void *) hdr->entrypoint + iBaseDiff;
365 // Alter Symbols to true base
366 for(i=0;i<iSymCount;i++)
368 dynsymtab[i].value += iBaseDiff;
369 dynsymtab[i].nameOfs += (intptr_t)dynstrtab;
370 //DEBUGS("elf_relocate: Sym '%s' = 0x%x (relocated)", dynsymtab[i].name, dynsymtab[i].value);
374 // === Add to loaded list (can be imported now) ===
375 AddLoaded( Filename, Base );
377 // === Parse Relocation Data ===
378 DEBUGS(" elf_relocate: dynamicTab = 0x%x", dynamicTab);
379 for( j = 0; dynamicTab[j].d_tag != DT_NULL; j++)
381 switch(dynamicTab[j].d_tag)
383 // --- Shared Library Name ---
385 DEBUGS(" elf_relocate: .so Name '%s'", dynstrtab+dynamicTab[j].d_val);
387 // --- Needed Library ---
389 libPath = dynstrtab + dynamicTab[j].d_val;
390 DEBUGS(" Required Library '%s'", libPath);
391 if(LoadLibrary(libPath, NULL, envp) == 0) {
393 DEBUGS(" elf_relocate: Unable to load '%s'", libPath);
395 SysDebug("Unable to load required library '%s'", libPath);
401 case DT_PLTGOT: pltgot = (void*)(iBaseDiff + dynamicTab[j].d_val); break;
402 case DT_JMPREL: plt = (void*)(iBaseDiff + dynamicTab[j].d_val); break;
403 case DT_PLTREL: pltType = dynamicTab[j].d_val; break;
404 case DT_PLTRELSZ: pltSz = dynamicTab[j].d_val; break;
406 // --- Relocation ---
407 case DT_REL: rel = (void*)(iBaseDiff + dynamicTab[j].d_val); break;
408 case DT_RELSZ: relSz = dynamicTab[j].d_val; break;
409 case DT_RELENT: relEntSz = dynamicTab[j].d_val; break;
410 case DT_RELA: rela = (void*)(iBaseDiff + dynamicTab[j].d_val); break;
411 case DT_RELASZ: relaSz = dynamicTab[j].d_val; break;
412 case DT_RELAENT: relaEntSz = dynamicTab[j].d_val; break;
414 // --- Symbol Table ---
416 // --- Hash Table ---
418 // --- String Table ---
424 if(dynamicTab[j].d_tag > DT_JMPREL) continue;
425 //DEBUGS(" elf_relocate: %i-%i = %s,0x%x",
426 // i,j, csaDT_NAMES[dynamicTab[j].d_tag],dynamicTab[j].d_val);
431 DEBUGS(" elf_relocate: Beginning Relocation");
433 void elf_doRelocate(uint32_t r_info, uint32_t *ptr, Elf32_Addr addend, Elf32_Sym *symtab)
435 int type = ELF32_R_TYPE(r_info);
436 int sym = ELF32_R_SYM(r_info);
438 const char *symname = dynstrtab + symtab[sym].nameOfs;
441 // Standard 32 Bit Relocation (S+A)
443 val = (intptr_t) GetSymbol( symname );
444 DEBUGS(" elf_doRelocate: R_386_32 *0x%x += 0x%x('%s')",
449 // 32 Bit Relocation wrt. Offset (S+A-P)
451 DEBUGS(" elf_doRelocate: #%i: '%s'", sym, symname);
452 val = (intptr_t) GetSymbol( symname );
453 DEBUGS(" elf_doRelocate: R_386_PC32 *0x%x = 0x%x + 0x%x - 0x%x",
454 ptr, *ptr, val, (intptr_t)ptr );
455 *ptr = val + addend - (intptr_t)ptr;
456 //*ptr = val + addend - ((Uint)ptr - iBaseDiff);
459 // Absolute Value of a symbol (S)
462 DEBUGS(" elf_doRelocate: #%i: '%s'", sym, symname);
463 val = (intptr_t) GetSymbol( symname );
464 DEBUGS(" elf_doRelocate: %s *0x%x = 0x%x", csaR_NAMES[type], ptr, val);
468 // Base Address (B+A)
470 DEBUGS(" elf_doRelocate: R_386_RELATIVE *0x%x = 0x%x + 0x%x", ptr, iBaseDiff, addend);
471 *ptr = iBaseDiff + addend;
475 DEBUGS(" elf_doRelocate: Rel 0x%x: 0x%x,%s", ptr, sym, csaR_NAMES[type]);
480 // Parse Relocation Entries
484 DEBUGS(" elf_relocate: rel=0x%x, relSz=0x%x, relEntSz=0x%x", rel, relSz, relEntSz);
485 j = relSz / relEntSz;
486 for( i = 0; i < j; i++ )
488 //DEBUGS(" Rel %i: 0x%x+0x%x", i, iBaseDiff, rel[i].r_offset);
489 ptr = (void*)(iBaseDiff + rel[i].r_offset);
490 elf_doRelocate(rel[i].r_info, ptr, *ptr, dynsymtab);
493 // Parse Relocation Entries
497 DEBUGS(" elf_relocate: rela=0x%x, relaSz=0x%x, relaEntSz=0x%x", rela, relaSz, relaEntSz);
498 j = relaSz / relaEntSz;
499 for( i = 0; i < j; i++ )
501 ptr = (void*)(iBaseDiff + rela[i].r_offset);
502 elf_doRelocate(rel[i].r_info, ptr, rela[i].r_addend, dynsymtab);
506 // === Process PLT (Procedure Linkage Table) ===
510 DEBUGS(" elf_relocate: Relocate PLT, plt=0x%x", plt);
511 if(pltType == DT_REL)
513 Elf32_Rel *pltRel = plt;
514 j = pltSz / sizeof(Elf32_Rel);
515 DEBUGS(" elf_relocate: PLT Reloc Type = Rel, %i entries", j);
518 ptr = (void*)(iBaseDiff + pltRel[i].r_offset);
519 elf_doRelocate(pltRel[i].r_info, ptr, *ptr, dynsymtab);
524 Elf32_Rela *pltRela = plt;
525 j = pltSz / sizeof(Elf32_Rela);
526 DEBUGS(" elf_relocate: PLT Reloc Type = Rela, %i entries", j);
529 ptr = (void*)(iRealBase + pltRela[i].r_offset);
530 elf_doRelocate(pltRela[i].r_info, ptr, pltRela[i].r_addend, dynsymtab);
535 DEBUGS("ElfRelocate: RETURN 0x%x", hdr->entrypoint + iBaseDiff);
536 return (void*)hdr->entrypoint + iBaseDiff;
541 * \fn int ElfGetSymbol(Uint Base, const char *name, void **ret)
543 int ElfGetSymbol(void *Base, const char *Name, void **ret)
545 Elf32_Ehdr *hdr = Base;
547 switch(hdr->e_ident[4])
550 return Elf32GetSymbol(Base, Name, ret);
552 return Elf64GetSymbol(Base, Name, ret);
554 SysDebug("ld-acess - ElfRelocate: Unknown file class %i", hdr->e_ident[4]);
559 int Elf64GetSymbol(void *Base, const char *Name, void **Ret)
561 Elf64_Ehdr *hdr = Base;
566 Elf64_Word *pBuckets;
569 const char *dynstrtab;
570 uintptr_t iBaseDiff = -1;
572 // DEBUGS("sizeof(uint32_t) = %i, sizeof(Elf64_Word) = %i", sizeof(uint32_t), sizeof(Elf64_Word));
578 // Catch the current executable
582 Elf64_Dyn *dynTab = NULL;
586 phtab = (void*)( Base + hdr->e_phoff );
587 for( i = 0; i < hdr->e_phnum; i ++ )
589 if(phtab[i].p_type == PT_LOAD && iBaseDiff > phtab[i].p_vaddr)
590 iBaseDiff = phtab[i].p_vaddr;
591 if( phtab[i].p_type == PT_DYNAMIC ) {
592 dynTab = (void*)(intptr_t)phtab[i].p_vaddr;
596 SysDebug("ERROR - Unable to find DYNAMIC segment in %p", Base);
599 iBaseDiff = (intptr_t)Base - iBaseDiff; // Make iBaseDiff actually the diff
600 dynTab = (void*)( (intptr_t)dynTab + iBaseDiff );
602 for( j = 0; dynTab[j].d_tag != DT_NULL; j++)
604 switch(dynTab[j].d_tag)
606 // --- Symbol Table ---
608 symtab = (void*)(intptr_t) dynTab[j].d_un.d_val; // Rebased in Relocate
611 dynstrtab = (void*)(intptr_t) dynTab[j].d_un.d_val;
615 pBuckets = (void*)(intptr_t) dynTab[j].d_un.d_val;
620 // DEBUGS("pBuckets = %p", pBuckets);
622 nbuckets = pBuckets[0];
623 iSymCount = pBuckets[1];
624 pBuckets = &pBuckets[2];
625 // DEBUGS("nbuckets = %i", nbuckets);
626 pChains = &pBuckets[ nbuckets ];
629 iNameHash = ElfHashString(Name);
630 iNameHash %= nbuckets;
633 i = pBuckets[ iNameHash ];
634 // DEBUGS("dynstrtab = %p", dynstrtab);
635 // DEBUGS("symtab = %p, i = %i", symtab, i);
636 if(symtab[i].st_shndx != SHN_UNDEF && strcmp(dynstrtab + symtab[i].st_name, Name) == 0) {
637 *Ret = (void*) (intptr_t) symtab[i].st_value + iBaseDiff;
638 DEBUGS("%s = %p", Name, *Ret);
642 while(pChains[i] != STN_UNDEF)
645 // DEBUGS("chains i = %i", i);
646 if(symtab[i].st_shndx != SHN_UNDEF && strcmp(dynstrtab + symtab[i].st_name, Name) == 0) {
647 *Ret = (void*)(intptr_t)symtab[i].st_value + iBaseDiff;
648 DEBUGS("%s = %p", Name, *Ret);
653 // DEBUGS("Elf64GetSymbol: RETURN 0, Symbol '%s' not found", Name);
657 int Elf32GetSymbol(void *Base, const char *Name, void **ret)
659 Elf32_Ehdr *hdr = Base;
667 const char *dynstrtab;
668 uintptr_t iBaseDiff = -1;
670 //DEBUGS("ElfGetSymbol: (Base=0x%x, Name='%s')", Base, Name);
675 // Catch the current executable
679 Elf32_Dyn *dynTab = NULL;
683 phtab = (void*)( Base + hdr->phoff );
684 for( i = 0; i < hdr->phentcount; i ++ )
686 if(phtab[i].Type == PT_LOAD && iBaseDiff > phtab[i].VAddr)
687 iBaseDiff = phtab[i].VAddr;
688 if( phtab[i].Type == PT_DYNAMIC ) {
689 dynTab = (void*)(intptr_t)phtab[i].VAddr;
693 SysDebug("ERROR - Unable to find DYNAMIC segment in %p", Base);
696 iBaseDiff = (intptr_t)Base - iBaseDiff; // Make iBaseDiff actually the diff
697 dynTab = (void*)( (intptr_t)dynTab + iBaseDiff );
699 for( j = 0; dynTab[j].d_tag != DT_NULL; j++)
701 switch(dynTab[j].d_tag)
703 // --- Symbol Table ---
705 symtab = (void*)(intptr_t) dynTab[j].d_val; // Rebased in Relocate
708 dynstrtab = (void*)(intptr_t) dynTab[j].d_val;
712 pBuckets = (void*)(intptr_t) dynTab[j].d_val;
718 hdr->misc.HashTable = pBuckets;
719 hdr->misc.SymTable = symtab;
720 hdr->misc.StrTab = dynstrtab;
724 nbuckets = pBuckets[0];
725 iSymCount = pBuckets[1];
726 pBuckets = &pBuckets[2];
727 pChains = &pBuckets[ nbuckets ];
730 iNameHash = ElfHashString(Name);
731 iNameHash %= nbuckets;
732 //DEBUGS(" ElfGetSymbol: iNameHash = 0x%x", iNameHash);
735 i = pBuckets[ iNameHash ];
736 //DEBUGS(" ElfGetSymbol: strcmp(Name, \"%s\")", symtab[i].name);
737 if(symtab[i].shndx != SHN_UNDEF && strcmp(dynstrtab + symtab[i].nameOfs, Name) == 0) {
738 *ret = (void*) (intptr_t) symtab[ i ].value + iBaseDiff;
742 //DEBUGS(" ElfGetSymbol: Hash of first = 0x%x", ElfHashString( symtab[i].name ) % nbuckets);
743 while(pChains[i] != STN_UNDEF)
745 //DEBUGS(" pChains[%i] = %i", i, pChains[i]);
747 //DEBUGS(" ElfGetSymbol: strcmp(Name, \"%s\")", symtab[ i ].name);
748 if(symtab[i].shndx != SHN_UNDEF && strcmp(dynstrtab + symtab[ i ].nameOfs, Name) == 0) {
749 //DEBUGS("ElfGetSymbol: RETURN 1, '%s' = 0x%x", symtab[ i ].name, symtab[ i ].value);
750 *ret = (void*)(intptr_t)symtab[ i ].value + iBaseDiff;
755 //DEBUGS("ElfGetSymbol: RETURN 0, Symbol '%s' not found", Name);
759 Uint32 ElfHashString(const char *name)
764 h = (h << 4) + *(Uint8*)name++;
765 if( (g = h & 0xf0000000) )
773 unsigned long elf_hash(const unsigned char *name)
775 unsigned long h = 0, g;
778 h = (h << 4) + *name++;
779 if (g = h & 0xf0000000)