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;
206 case R_X86_64_GLOB_DAT:
207 *(uint64_t*)ptr = (uint64_t)GetSymbol(symname);
209 case R_X86_64_JUMP_SLOT:
210 *(uint64_t*)ptr = (uint64_t)GetSymbol(symname);
213 SysDebug("ld-acess - _Elf64DoReloc: Unknown relocation type %i", type);
220 DEBUGS("rel_count = %i", rel_count);
221 for( i = 0; i < rel_count; i ++ )
223 uint64_t *ptr = (void *)( rel[i].r_offset + baseDiff );
224 _Elf64DoReloc( rel[i].r_info, ptr, *ptr);
230 DEBUGS("rela_count = %i", rela_count);
231 for( i = 0; i < rela_count; i ++ )
233 _Elf64DoReloc( rela[i].r_info, (void *)( rela[i].r_offset + baseDiff ), rela[i].r_addend );
237 if( pltrel && plt_type )
239 if( plt_type == DT_REL ) {
240 Elf64_Rel *plt = pltrel;
241 int count = plt_size / sizeof(Elf64_Rel);
242 DEBUGS("plt rel count = %i", count);
243 for( i = 0; i < count; i ++ )
245 uint64_t *ptr = (void *)( plt[i].r_offset + baseDiff );
246 _Elf64DoReloc( plt[i].r_info, ptr, *ptr);
250 Elf64_Rela *plt = pltrel;
251 int count = plt_size / sizeof(Elf64_Rela);
252 DEBUGS("plt rela count = %i", count);
253 for( i = 0; i < count; i ++ )
255 _Elf64DoReloc( plt[i].r_info, (void *)(plt[i].r_offset + baseDiff), plt[i].r_addend);
260 DEBUGS("Elf64Relocate: Relocations done, return %p", (void *)(hdr->e_entry + baseDiff));
261 return (void *)(hdr->e_entry + baseDiff);
264 void *Elf32Relocate(void *Base, char **envp, const char *Filename)
266 Elf32_Ehdr *hdr = Base;
268 int i, j; // Counters
270 intptr_t iRealBase = -1;
274 Elf32_Rel *rel = NULL;
275 Elf32_Rela *rela = NULL;
276 Uint32 *pltgot = NULL;
278 int relSz=0, relEntSz=8;
279 int relaSz=0, relaEntSz=8;
280 int pltSz=0, pltType=0;
281 Elf32_Dyn *dynamicTab = NULL; // Dynamic Table Pointer
282 char *dynstrtab = NULL; // .dynamic String Table
283 Elf32_Sym *dynsymtab;
285 DEBUGS("ElfRelocate: (Base=0x%x)", Base);
287 // Check magic header
290 // Parse Program Header to get Dynamic Table
291 phtab = Base + hdr->phoff;
292 iSegmentCount = hdr->phentcount;
293 for(i=0;i<iSegmentCount;i++)
295 // Determine linked base address
296 if(phtab[i].Type == PT_LOAD && iRealBase > phtab[i].VAddr)
297 iRealBase = phtab[i].VAddr;
299 // Find Dynamic Section
300 if(phtab[i].Type == PT_DYNAMIC) {
302 DEBUGS(" WARNING - elf_relocate: Multiple PT_DYNAMIC segments");
305 dynamicTab = (void *) (intptr_t) phtab[i].VAddr;
306 j = i; // Save Dynamic Table ID
310 // Page Align real base
312 DEBUGS(" elf_relocate: True Base = 0x%x, Compiled Base = 0x%x", Base, iRealBase);
314 // Adjust "Real" Base
315 iBaseDiff = (intptr_t)Base - iRealBase;
317 // hdr->entrypoint += iBaseDiff; // Adjust Entrypoint
319 // Check if a PT_DYNAMIC segement was found
321 SysDebug(" elf_relocate: No PT_DYNAMIC segment in image %p, returning", Base);
322 return (void *)(intptr_t)(hdr->entrypoint + iBaseDiff);
325 // Adjust Dynamic Table
326 dynamicTab = (void *)( (intptr_t)dynamicTab + iBaseDiff );
328 // === Get Symbol table and String Table ===
329 for( j = 0; dynamicTab[j].d_tag != DT_NULL; j++)
331 switch(dynamicTab[j].d_tag)
333 // --- Symbol Table ---
335 DEBUGS(" elf_relocate: DYNAMIC Symbol Table 0x%x (0x%x)",
336 dynamicTab[j].d_val, dynamicTab[j].d_val + iBaseDiff);
337 if(iBaseDiff != 0) dynamicTab[j].d_val += iBaseDiff;
338 dynsymtab = (void*)(dynamicTab[j].d_val);
339 // hdr->misc.SymTable = dynamicTab[j].d_val; // Saved in unused bytes of ident
341 // --- String Table ---
343 DEBUGS(" elf_relocate: DYNAMIC String Table 0x%x (0x%x)",
344 dynamicTab[j].d_val, dynamicTab[j].d_val + iBaseDiff);
345 if(iBaseDiff != 0) dynamicTab[j].d_val += iBaseDiff;
346 dynstrtab = (void*)(dynamicTab[j].d_val);
350 if(iBaseDiff != 0) dynamicTab[j].d_val += iBaseDiff;
351 iSymCount = ((Elf32_Word*)(dynamicTab[j].d_val))[1];
352 // hdr->misc.HashTable = dynamicTab[j].d_val; // Saved in unused bytes of ident
357 if(dynsymtab == NULL) {
358 SysDebug("ld-acess.so - WARNING: No Dynamic Symbol table in %p, returning", hdr);
359 return (void *) hdr->entrypoint + iBaseDiff;
363 // Alter Symbols to true base
364 for(i=0;i<iSymCount;i++)
366 dynsymtab[i].value += iBaseDiff;
367 dynsymtab[i].nameOfs += (intptr_t)dynstrtab;
368 //DEBUGS("elf_relocate: Sym '%s' = 0x%x (relocated)", dynsymtab[i].name, dynsymtab[i].value);
372 // === Add to loaded list (can be imported now) ===
373 AddLoaded( Filename, Base );
375 // === Parse Relocation Data ===
376 DEBUGS(" elf_relocate: dynamicTab = 0x%x", dynamicTab);
377 for( j = 0; dynamicTab[j].d_tag != DT_NULL; j++)
379 switch(dynamicTab[j].d_tag)
381 // --- Shared Library Name ---
383 DEBUGS(" elf_relocate: .so Name '%s'", dynstrtab+dynamicTab[j].d_val);
385 // --- Needed Library ---
387 libPath = dynstrtab + dynamicTab[j].d_val;
388 DEBUGS(" Required Library '%s'", libPath);
389 if(LoadLibrary(libPath, NULL, envp) == 0) {
391 DEBUGS(" elf_relocate: Unable to load '%s'", libPath);
393 SysDebug("Unable to load required library '%s'", libPath);
399 case DT_PLTGOT: pltgot = (void*)(iBaseDiff + dynamicTab[j].d_val); break;
400 case DT_JMPREL: plt = (void*)(iBaseDiff + dynamicTab[j].d_val); break;
401 case DT_PLTREL: pltType = dynamicTab[j].d_val; break;
402 case DT_PLTRELSZ: pltSz = dynamicTab[j].d_val; break;
404 // --- Relocation ---
405 case DT_REL: rel = (void*)(iBaseDiff + dynamicTab[j].d_val); break;
406 case DT_RELSZ: relSz = dynamicTab[j].d_val; break;
407 case DT_RELENT: relEntSz = dynamicTab[j].d_val; break;
408 case DT_RELA: rela = (void*)(iBaseDiff + dynamicTab[j].d_val); break;
409 case DT_RELASZ: relaSz = dynamicTab[j].d_val; break;
410 case DT_RELAENT: relaEntSz = dynamicTab[j].d_val; break;
412 // --- Symbol Table ---
414 // --- Hash Table ---
416 // --- String Table ---
422 if(dynamicTab[j].d_tag > DT_JMPREL) continue;
423 //DEBUGS(" elf_relocate: %i-%i = %s,0x%x",
424 // i,j, csaDT_NAMES[dynamicTab[j].d_tag],dynamicTab[j].d_val);
429 DEBUGS(" elf_relocate: Beginning Relocation");
431 void elf_doRelocate(uint32_t r_info, uint32_t *ptr, Elf32_Addr addend, Elf32_Sym *symtab)
433 int type = ELF32_R_TYPE(r_info);
434 int sym = ELF32_R_SYM(r_info);
436 const char *symname = dynstrtab + symtab[sym].nameOfs;
439 // Standard 32 Bit Relocation (S+A)
441 val = (intptr_t) GetSymbol( symname );
442 DEBUGS(" elf_doRelocate: R_386_32 *0x%x += 0x%x('%s')",
447 // 32 Bit Relocation wrt. Offset (S+A-P)
449 DEBUGS(" elf_doRelocate: #%i: '%s'", sym, symname);
450 val = (intptr_t) GetSymbol( symname );
451 DEBUGS(" elf_doRelocate: R_386_PC32 *0x%x = 0x%x + 0x%x - 0x%x",
452 ptr, *ptr, val, (intptr_t)ptr );
453 *ptr = val + addend - (intptr_t)ptr;
454 //*ptr = val + addend - ((Uint)ptr - iBaseDiff);
457 // Absolute Value of a symbol (S)
460 DEBUGS(" elf_doRelocate: #%i: '%s'", sym, symname);
461 val = (intptr_t) GetSymbol( symname );
462 DEBUGS(" elf_doRelocate: %s *0x%x = 0x%x", csaR_NAMES[type], ptr, val);
466 // Base Address (B+A)
468 DEBUGS(" elf_doRelocate: R_386_RELATIVE *0x%x = 0x%x + 0x%x", ptr, iBaseDiff, addend);
469 *ptr = iBaseDiff + addend;
473 DEBUGS(" elf_doRelocate: Rel 0x%x: 0x%x,%s", ptr, sym, csaR_NAMES[type]);
478 // Parse Relocation Entries
482 DEBUGS(" elf_relocate: rel=0x%x, relSz=0x%x, relEntSz=0x%x", rel, relSz, relEntSz);
483 j = relSz / relEntSz;
484 for( i = 0; i < j; i++ )
486 //DEBUGS(" Rel %i: 0x%x+0x%x", i, iBaseDiff, rel[i].r_offset);
487 ptr = (void*)(iBaseDiff + rel[i].r_offset);
488 elf_doRelocate(rel[i].r_info, ptr, *ptr, dynsymtab);
491 // Parse Relocation Entries
495 DEBUGS(" elf_relocate: rela=0x%x, relaSz=0x%x, relaEntSz=0x%x", rela, relaSz, relaEntSz);
496 j = relaSz / relaEntSz;
497 for( i = 0; i < j; i++ )
499 ptr = (void*)(iBaseDiff + rela[i].r_offset);
500 elf_doRelocate(rel[i].r_info, ptr, rela[i].r_addend, dynsymtab);
504 // === Process PLT (Procedure Linkage Table) ===
508 DEBUGS(" elf_relocate: Relocate PLT, plt=0x%x", plt);
509 if(pltType == DT_REL)
511 Elf32_Rel *pltRel = plt;
512 j = pltSz / sizeof(Elf32_Rel);
513 DEBUGS(" elf_relocate: PLT Reloc Type = Rel, %i entries", j);
516 ptr = (void*)(iBaseDiff + pltRel[i].r_offset);
517 elf_doRelocate(pltRel[i].r_info, ptr, *ptr, dynsymtab);
522 Elf32_Rela *pltRela = plt;
523 j = pltSz / sizeof(Elf32_Rela);
524 DEBUGS(" elf_relocate: PLT Reloc Type = Rela, %i entries", j);
527 ptr = (void*)(iRealBase + pltRela[i].r_offset);
528 elf_doRelocate(pltRela[i].r_info, ptr, pltRela[i].r_addend, dynsymtab);
533 DEBUGS("ElfRelocate: RETURN 0x%x", hdr->entrypoint + iBaseDiff);
534 return (void*)hdr->entrypoint + iBaseDiff;
539 * \fn int ElfGetSymbol(Uint Base, const char *name, void **ret)
541 int ElfGetSymbol(void *Base, const char *Name, void **ret)
543 Elf32_Ehdr *hdr = Base;
545 switch(hdr->e_ident[4])
548 return Elf32GetSymbol(Base, Name, ret);
550 return Elf64GetSymbol(Base, Name, ret);
552 SysDebug("ld-acess - ElfRelocate: Unknown file class %i", hdr->e_ident[4]);
557 int Elf64GetSymbol(void *Base, const char *Name, void **Ret)
559 Elf64_Ehdr *hdr = Base;
564 Elf64_Word *pBuckets;
567 const char *dynstrtab;
568 uintptr_t iBaseDiff = -1;
570 // DEBUGS("sizeof(uint32_t) = %i, sizeof(Elf64_Word) = %i", sizeof(uint32_t), sizeof(Elf64_Word));
576 // Catch the current executable
580 Elf64_Dyn *dynTab = NULL;
584 phtab = (void*)( Base + hdr->e_phoff );
585 for( i = 0; i < hdr->e_phnum; i ++ )
587 if(phtab[i].p_type == PT_LOAD && iBaseDiff > phtab[i].p_vaddr)
588 iBaseDiff = phtab[i].p_vaddr;
589 if( phtab[i].p_type == PT_DYNAMIC ) {
590 dynTab = (void*)(intptr_t)phtab[i].p_vaddr;
594 SysDebug("ERROR - Unable to find DYNAMIC segment in %p", Base);
597 iBaseDiff = (intptr_t)Base - iBaseDiff; // Make iBaseDiff actually the diff
598 dynTab = (void*)( (intptr_t)dynTab + iBaseDiff );
600 for( j = 0; dynTab[j].d_tag != DT_NULL; j++)
602 switch(dynTab[j].d_tag)
604 // --- Symbol Table ---
606 symtab = (void*)(intptr_t) dynTab[j].d_un.d_val; // Rebased in Relocate
609 dynstrtab = (void*)(intptr_t) dynTab[j].d_un.d_val;
613 pBuckets = (void*)(intptr_t) dynTab[j].d_un.d_val;
618 // DEBUGS("pBuckets = %p", pBuckets);
620 nbuckets = pBuckets[0];
621 iSymCount = pBuckets[1];
622 pBuckets = &pBuckets[2];
623 // DEBUGS("nbuckets = %i", nbuckets);
624 pChains = &pBuckets[ nbuckets ];
627 iNameHash = ElfHashString(Name);
628 iNameHash %= nbuckets;
631 i = pBuckets[ iNameHash ];
632 // DEBUGS("dynstrtab = %p", dynstrtab);
633 // DEBUGS("symtab = %p, i = %i", symtab, i);
634 if(symtab[i].st_shndx != SHN_UNDEF && strcmp(dynstrtab + symtab[i].st_name, Name) == 0) {
635 *Ret = (void*) (intptr_t) symtab[i].st_value + iBaseDiff;
636 DEBUGS("%s = %p", Name, *Ret);
640 while(pChains[i] != STN_UNDEF)
643 // DEBUGS("chains i = %i", i);
644 if(symtab[i].st_shndx != SHN_UNDEF && strcmp(dynstrtab + symtab[i].st_name, Name) == 0) {
645 *Ret = (void*)(intptr_t)symtab[i].st_value + iBaseDiff;
646 DEBUGS("%s = %p", Name, *Ret);
651 // DEBUGS("Elf64GetSymbol: RETURN 0, Symbol '%s' not found", Name);
655 int Elf32GetSymbol(void *Base, const char *Name, void **ret)
657 Elf32_Ehdr *hdr = Base;
665 const char *dynstrtab;
666 uintptr_t iBaseDiff = -1;
668 //DEBUGS("ElfGetSymbol: (Base=0x%x, Name='%s')", Base, Name);
673 // Catch the current executable
677 Elf32_Dyn *dynTab = NULL;
681 phtab = (void*)( Base + hdr->phoff );
682 for( i = 0; i < hdr->phentcount; i ++ )
684 if(phtab[i].Type == PT_LOAD && iBaseDiff > phtab[i].VAddr)
685 iBaseDiff = phtab[i].VAddr;
686 if( phtab[i].Type == PT_DYNAMIC ) {
687 dynTab = (void*)(intptr_t)phtab[i].VAddr;
691 SysDebug("ERROR - Unable to find DYNAMIC segment in %p", Base);
694 iBaseDiff = (intptr_t)Base - iBaseDiff; // Make iBaseDiff actually the diff
695 dynTab = (void*)( (intptr_t)dynTab + iBaseDiff );
697 for( j = 0; dynTab[j].d_tag != DT_NULL; j++)
699 switch(dynTab[j].d_tag)
701 // --- Symbol Table ---
703 symtab = (void*)(intptr_t) dynTab[j].d_val; // Rebased in Relocate
706 dynstrtab = (void*)(intptr_t) dynTab[j].d_val;
710 pBuckets = (void*)(intptr_t) dynTab[j].d_val;
716 hdr->misc.HashTable = pBuckets;
717 hdr->misc.SymTable = symtab;
718 hdr->misc.StrTab = dynstrtab;
722 nbuckets = pBuckets[0];
723 iSymCount = pBuckets[1];
724 pBuckets = &pBuckets[2];
725 pChains = &pBuckets[ nbuckets ];
728 iNameHash = ElfHashString(Name);
729 iNameHash %= nbuckets;
730 //DEBUGS(" ElfGetSymbol: iNameHash = 0x%x", iNameHash);
733 i = pBuckets[ iNameHash ];
734 //DEBUGS(" ElfGetSymbol: strcmp(Name, \"%s\")", symtab[i].name);
735 if(symtab[i].shndx != SHN_UNDEF && strcmp(dynstrtab + symtab[i].nameOfs, Name) == 0) {
736 *ret = (void*) (intptr_t) symtab[ i ].value + iBaseDiff;
740 //DEBUGS(" ElfGetSymbol: Hash of first = 0x%x", ElfHashString( symtab[i].name ) % nbuckets);
741 while(pChains[i] != STN_UNDEF)
743 //DEBUGS(" pChains[%i] = %i", i, pChains[i]);
745 //DEBUGS(" ElfGetSymbol: strcmp(Name, \"%s\")", symtab[ i ].name);
746 if(symtab[i].shndx != SHN_UNDEF && strcmp(dynstrtab + symtab[ i ].nameOfs, Name) == 0) {
747 //DEBUGS("ElfGetSymbol: RETURN 1, '%s' = 0x%x", symtab[ i ].name, symtab[ i ].value);
748 *ret = (void*)(intptr_t)symtab[ i ].value + iBaseDiff;
753 //DEBUGS("ElfGetSymbol: RETURN 0, Symbol '%s' not found", Name);
757 Uint32 ElfHashString(const char *name)
762 h = (h << 4) + *(Uint8*)name++;
763 if( (g = h & 0xf0000000) )
771 unsigned long elf_hash(const unsigned char *name)
773 unsigned long h = 0, g;
776 h = (h << 4) + *name++;
777 if (g = h & 0xf0000000)