1 /* -----------------------------------------------------------------------------
2 * $Id: Linker.c,v 1.41 2001/05/16 09:40:11 sewardj Exp $
4 * (c) The GHC Team, 2000
8 * ---------------------------------------------------------------------------*/
15 #include "LinkerInternals.h"
17 #include "StoragePriv.h"
19 #ifdef HAVE_SYS_TYPES_H
20 #include <sys/types.h>
23 #ifdef HAVE_SYS_STAT_H
31 #if defined(linux_TARGET_OS) || defined(solaris2_TARGET_OS) || defined(freebsd_TARGET_OS)
32 # define OBJFORMAT_ELF
33 #elif defined(cygwin32_TARGET_OS) || defined (mingw32_TARGET_OS)
34 # define OBJFORMAT_PEi386
38 /* Hash table mapping symbol names to Symbol */
39 /*Str*/HashTable *symhash;
41 #if defined(OBJFORMAT_ELF)
42 static int ocVerifyImage_ELF ( ObjectCode* oc );
43 static int ocGetNames_ELF ( ObjectCode* oc );
44 static int ocResolve_ELF ( ObjectCode* oc );
45 #elif defined(OBJFORMAT_PEi386)
46 static int ocVerifyImage_PEi386 ( ObjectCode* oc );
47 static int ocGetNames_PEi386 ( ObjectCode* oc );
48 static int ocResolve_PEi386 ( ObjectCode* oc );
51 /* -----------------------------------------------------------------------------
52 * Built-in symbols from the RTS
55 typedef struct _RtsSymbolVal {
62 #define Maybe_ForeignObj SymX(mkForeignObjzh_fast)
64 #define Maybe_Stable_Names SymX(mkWeakzh_fast) \
65 SymX(makeStableNamezh_fast) \
66 SymX(finalizzeWeakzh_fast)
68 /* These are not available in GUM!!! -- HWL */
69 #define Maybe_ForeignObj
70 #define Maybe_Stable_Names
73 #if !defined (mingw32_TARGET_OS)
75 #define RTS_POSIX_ONLY_SYMBOLS \
76 SymX(stg_sig_install) \
78 #define RTS_MINGW_ONLY_SYMBOLS /**/
82 #define RTS_POSIX_ONLY_SYMBOLS
83 #define RTS_MINGW_ONLY_SYMBOLS \
109 Sym(PrelHandle_stderr_closure) \
110 Sym(Main_main_closure) \
133 Sym(_imp___timezone) \
135 SymX(GetProcessTimes) \
136 SymX(GetCurrentProcess) \
147 #define RTS_SYMBOLS \
149 Sym(stg_gc_enter_1) \
156 Sym(stg_gc_unbx_r1) \
161 SymX(stg_update_PAP) \
162 SymX(stg_ap_1_upd_info) \
163 SymX(stg_ap_2_upd_info) \
164 SymX(stg_ap_3_upd_info) \
165 SymX(stg_ap_4_upd_info) \
166 SymX(stg_ap_5_upd_info) \
167 SymX(stg_ap_6_upd_info) \
168 SymX(stg_ap_7_upd_info) \
169 SymX(stg_ap_8_upd_info) \
170 SymX(stg_sel_0_upd_info) \
171 SymX(stg_sel_1_upd_info) \
172 SymX(stg_sel_2_upd_info) \
173 SymX(stg_sel_3_upd_info) \
174 SymX(stg_sel_4_upd_info) \
175 SymX(stg_sel_5_upd_info) \
176 SymX(stg_sel_6_upd_info) \
177 SymX(stg_sel_7_upd_info) \
178 SymX(stg_sel_8_upd_info) \
179 SymX(stg_sel_9_upd_info) \
180 SymX(stg_sel_10_upd_info) \
181 SymX(stg_sel_11_upd_info) \
182 SymX(stg_sel_12_upd_info) \
183 SymX(stg_sel_13_upd_info) \
184 SymX(stg_sel_14_upd_info) \
185 SymX(stg_sel_15_upd_info) \
186 SymX(stg_upd_frame_info) \
187 SymX(stg_seq_frame_info) \
188 SymX(stg_CAF_BLACKHOLE_info) \
189 SymX(stg_IND_STATIC_info) \
190 SymX(stg_EMPTY_MVAR_info) \
191 SymX(stg_MUT_ARR_PTRS_FROZEN_info) \
192 SymX(stg_WEAK_info) \
193 SymX(stg_CHARLIKE_closure) \
194 SymX(stg_INTLIKE_closure) \
196 SymX(newBCOzh_fast) \
197 SymX(mkApUpd0zh_fast) \
198 SymX(putMVarzh_fast) \
199 SymX(newMVarzh_fast) \
200 SymX(takeMVarzh_fast) \
201 SymX(tryTakeMVarzh_fast) \
202 SymX(tryPutMVarzh_fast) \
208 SymX(killThreadzh_fast) \
209 SymX(waitReadzh_fast) \
210 SymX(waitWritezh_fast) \
211 SymX(suspendThread) \
213 SymX(stackOverflow) \
214 SymX(int2Integerzh_fast) \
215 SymX(word2Integerzh_fast) \
217 SymX(__encodeDouble) \
218 SymX(decodeDoublezh_fast) \
219 SymX(decodeFloatzh_fast) \
220 SymX(gcdIntegerzh_fast) \
221 SymX(newArrayzh_fast) \
222 SymX(unsafeThawArrayzh_fast) \
223 SymX(newByteArrayzh_fast) \
224 SymX(newMutVarzh_fast) \
225 SymX(quotRemIntegerzh_fast) \
226 SymX(quotIntegerzh_fast) \
227 SymX(remIntegerzh_fast) \
228 SymX(divExactIntegerzh_fast) \
229 SymX(divModIntegerzh_fast) \
230 SymX(timesIntegerzh_fast) \
231 SymX(minusIntegerzh_fast) \
232 SymX(plusIntegerzh_fast) \
233 SymX(andIntegerzh_fast) \
234 SymX(orIntegerzh_fast) \
235 SymX(xorIntegerzh_fast) \
236 SymX(complementIntegerzh_fast) \
238 SymX(blockAsyncExceptionszh_fast) \
239 SymX(unblockAsyncExceptionszh_fast) \
241 SymX(isDoubleInfinite) \
242 SymX(isDoubleDenormalized) \
243 SymX(isDoubleNegativeZero) \
244 SymX(__encodeFloat) \
246 SymX(isFloatInfinite) \
247 SymX(isFloatDenormalized) \
248 SymX(isFloatNegativeZero) \
249 SymX(__int_encodeFloat) \
250 SymX(__int_encodeDouble) \
251 SymX(__gmpz_cmp_si) \
252 SymX(__gmpz_cmp_ui) \
255 SymX(__gmpz_get_si) \
256 SymX(__gmpz_get_ui) \
259 SymX(resetNonBlockingFd) \
262 SymX(stable_ptr_table) \
263 SymX(shutdownHaskellAndExit) \
264 Sym(stg_enterStackTop) \
265 Sym(stg_yield_to_interpreter) \
269 Sym(__init_PrelGHC) \
270 SymX(freeHaskellFunctionPtr) \
273 SymX(NoRunnableThreadsHook) \
274 SymX(StackOverflowHook) \
275 SymX(OutOfHeapHook) \
276 SymX(MallocFailHook) \
277 SymX(PatErrorHdrHook) \
280 SymX(PostTraceHook) \
281 SymX(createAdjustor) \
296 SymX(rts_mkStablePtr) \
305 SymX(rts_getWord32) \
308 SymX(rts_getDouble) \
309 SymX(rts_getStablePtr) \
315 SymX(rts_evalLazyIO) \
316 SymX(rts_checkSchedStatus)
318 #ifndef SUPPORT_LONG_LONGS
319 #define RTS_LONG_LONG_SYMS /* nothing */
321 #define RTS_LONG_LONG_SYMS \
334 SymX(stg_remWord64) \
335 SymX(stg_quotWord64) \
337 SymX(stg_quotInt64) \
338 SymX(stg_negateInt64) \
339 SymX(stg_plusInt64) \
340 SymX(stg_minusInt64) \
341 SymX(stg_timesInt64) \
347 SymX(stg_shiftRL64) \
348 SymX(stg_iShiftL64) \
349 SymX(stg_iShiftRL64) \
350 SymX(stg_iShiftRA64) \
351 SymX(stg_intToInt64) \
352 SymX(stg_int64ToInt) \
353 SymX(stg_int64ToWord64) \
354 SymX(stg_wordToWord64) \
355 SymX(stg_word64ToWord) \
356 SymX(stg_word64ToInt64) \
357 SymX(int64ToIntegerzh_fast) \
358 SymX(word64ToIntegerzh_fast)
359 #endif /* SUPPORT_LONG_LONGS */
361 /* entirely bogus claims about types of these symbols */
362 #define Sym(vvv) extern void (vvv);
363 #define SymX(vvv) /**/
366 RTS_POSIX_ONLY_SYMBOLS
367 RTS_MINGW_ONLY_SYMBOLS
371 #ifdef LEADING_UNDERSCORE
372 #define MAYBE_LEADING_UNDERSCORE_STR(s) ("_" s)
374 #define MAYBE_LEADING_UNDERSCORE_STR(s) (s)
377 #define Sym(vvv) { MAYBE_LEADING_UNDERSCORE_STR(#vvv), \
379 #define SymX(vvv) Sym(vvv)
381 static RtsSymbolVal rtsSyms[] = {
384 RTS_POSIX_ONLY_SYMBOLS
385 RTS_MINGW_ONLY_SYMBOLS
386 { 0, 0 } /* sentinel */
389 /* -----------------------------------------------------------------------------
390 * initialize the object linker
392 #if defined(OBJFORMAT_ELF)
393 static void *dl_prog_handle;
401 symhash = allocStrHashTable();
403 /* populate the symbol table with stuff from the RTS */
404 for (sym = rtsSyms; sym->lbl != NULL; sym++) {
405 insertStrHashTable(symhash, sym->lbl, sym->addr);
407 # if defined(OBJFORMAT_ELF)
408 dl_prog_handle = dlopen(NULL, RTLD_LAZY);
412 /* -----------------------------------------------------------------------------
413 * Add a DLL from which symbols may be found. In the ELF case, just
414 * do RTLD_GLOBAL-style add, so no further messing around needs to
415 * happen in order that symbols in the loaded .so are findable --
416 * lookupSymbol() will subsequently see them by dlsym on the program's
417 * dl-handle. Returns NULL if success, otherwise ptr to an err msg.
419 * In the PEi386 case, open the DLLs and put handles to them in a
420 * linked list. When looking for a symbol, try all handles in the
424 #if defined(OBJFORMAT_PEi386)
425 /* A record for storing handles into DLLs. */
429 struct _OpenedDLL* next;
434 /* A list thereof. */
435 static OpenedDLL* opened_dlls = NULL;
441 addDLL ( char* dll_name )
443 # if defined(OBJFORMAT_ELF)
448 buf = stgMallocBytes(strlen(dll_name) + 10, "addDll");
449 sprintf(buf, "lib%s.so", dll_name);
450 hdl = dlopen(buf, RTLD_NOW | RTLD_GLOBAL );
453 /* dlopen failed; return a ptr to the error msg. */
455 if (errmsg == NULL) errmsg = "addDLL: unknown error";
460 ASSERT(0); /*NOTREACHED*/
461 # elif defined(OBJFORMAT_PEi386)
463 /* Add this DLL to the list of DLLs in which to search for symbols.
464 The first time through, also add the executable to the list,
465 since we need to search that too. */
469 /* fprintf(stderr, "addDLL %s\n", dll_name ); */
472 /* Later ... can't figure out why this doesn't work. So retain the
473 RTS_MINGW_ONLY_SYMBOLS hack for the time being. */
474 if (opened_dlls == NULL) {
475 /* First time through ... */
476 instance = GetModuleHandle(NULL);
477 if (instance == NULL)
478 return "addDLL: can't get handle to the executable";
479 o_dll = stgMallocBytes( sizeof(OpenedDLL), "addDLL-init" );
480 o_dll->instance = instance;
481 o_dll->next = opened_dlls;
486 buf = stgMallocBytes(strlen(dll_name) + 10, "addDll");
487 sprintf(buf, "%s.DLL", dll_name);
488 instance = LoadLibrary(buf);
490 if (instance == NULL) {
491 /* LoadLibrary failed; return a ptr to the error msg. */
492 return "addDLL: unknown error";
495 o_dll = stgMallocBytes( sizeof(OpenedDLL), "addDLL" );
496 o_dll->instance = instance;
497 o_dll->next = opened_dlls;
502 barf("addDLL: not implemented on this platform");
506 /* -----------------------------------------------------------------------------
507 * lookup a symbol in the hash table
510 lookupSymbol( char *lbl )
513 ASSERT(symhash != NULL);
514 val = lookupStrHashTable(symhash, lbl);
517 # if defined(OBJFORMAT_ELF)
518 return dlsym(dl_prog_handle, lbl);
519 # elif defined(OBJFORMAT_PEi386)
523 for (o_dll = opened_dlls; o_dll != NULL; o_dll = o_dll->next) {
524 sym = GetProcAddress(o_dll->instance, lbl);
525 if (sym != NULL) return sym;
536 lookupLocalSymbol( ObjectCode* oc, char *lbl )
539 val = lookupStrHashTable(oc->lochash, lbl);
549 /* -----------------------------------------------------------------------------
550 * Load an obj (populate the global symbol table, but don't resolve yet)
552 * Returns: 1 if ok, 0 on error.
555 loadObj( char *path )
562 /* fprintf(stderr, "loadObj %s\n", path ); */
564 /* assert that we haven't already loaded this object */
567 for (o = objects; o; o = o->next)
568 ASSERT(strcmp(o->fileName, path));
572 oc = stgMallocBytes(sizeof(ObjectCode), "loadObj(oc)");
574 # if defined(OBJFORMAT_ELF)
575 oc->formatName = "ELF";
576 # elif defined(OBJFORMAT_PEi386)
577 oc->formatName = "PEi386";
580 barf("loadObj: not implemented on this platform");
584 if (r == -1) { return 0; }
586 /* sigh, strdup() isn't a POSIX function, so do it the long way */
587 oc->fileName = stgMallocBytes( strlen(path)+1, "loadObj" );
588 strcpy(oc->fileName, path);
590 oc->fileSize = st.st_size;
591 oc->image = stgMallocBytes( st.st_size, "loadObj(image)" );
594 oc->lochash = allocStrHashTable();
596 /* chain it onto the list of objects */
600 /* load the image into memory */
601 f = fopen(path, "rb");
603 barf("loadObj: can't read `%s'", path);
605 n = fread ( oc->image, 1, oc->fileSize, f );
606 if (n != oc->fileSize) {
608 barf("loadObj: error whilst reading `%s'", path);
611 /* verify the in-memory image */
612 # if defined(OBJFORMAT_ELF)
613 r = ocVerifyImage_ELF ( oc );
614 # elif defined(OBJFORMAT_PEi386)
615 r = ocVerifyImage_PEi386 ( oc );
617 barf("loadObj: no verify method");
619 if (!r) { return r; }
621 /* build the symbol list for this image */
622 # if defined(OBJFORMAT_ELF)
623 r = ocGetNames_ELF ( oc );
624 # elif defined(OBJFORMAT_PEi386)
625 r = ocGetNames_PEi386 ( oc );
627 barf("loadObj: no getNames method");
629 if (!r) { return r; }
631 /* loaded, but not resolved yet */
632 oc->status = OBJECT_LOADED;
637 /* -----------------------------------------------------------------------------
638 * resolve all the currently unlinked objects in memory
640 * Returns: 1 if ok, 0 on error.
648 for (oc = objects; oc; oc = oc->next) {
649 if (oc->status != OBJECT_RESOLVED) {
650 # if defined(OBJFORMAT_ELF)
651 r = ocResolve_ELF ( oc );
652 # elif defined(OBJFORMAT_PEi386)
653 r = ocResolve_PEi386 ( oc );
655 barf("resolveObjs: not implemented on this platform");
657 if (!r) { return r; }
658 oc->status = OBJECT_RESOLVED;
664 /* -----------------------------------------------------------------------------
665 * delete an object from the pool
668 unloadObj( char *path )
670 ObjectCode *oc, *prev;
672 ASSERT(symhash != NULL);
673 ASSERT(objects != NULL);
676 for (oc = objects; oc; prev = oc, oc = oc->next) {
677 if (!strcmp(oc->fileName,path)) {
679 /* Remove all the mappings for the symbols within this
684 for (i = 0; i < oc->n_symbols; i++) {
685 if (oc->symbols[i] != NULL) {
686 removeStrHashTable(symhash, oc->symbols[i], NULL);
694 prev->next = oc->next;
697 /* We're going to leave this in place, in case there are
698 any pointers from the heap into it: */
699 /* free(oc->image); */
703 /* The local hash table should have been freed at the end
704 of the ocResolve_ call on it. */
705 ASSERT(oc->lochash == NULL);
711 belch("unloadObj: can't find `%s' to unload", path);
715 /* --------------------------------------------------------------------------
716 * PEi386 specifics (Win32 targets)
717 * ------------------------------------------------------------------------*/
719 /* The information for this linker comes from
720 Microsoft Portable Executable
721 and Common Object File Format Specification
722 revision 5.1 January 1998
723 which SimonM says comes from the MS Developer Network CDs.
727 #if defined(OBJFORMAT_PEi386)
731 typedef unsigned char UChar;
732 typedef unsigned short UInt16;
733 typedef unsigned int UInt32;
740 UInt16 NumberOfSections;
741 UInt32 TimeDateStamp;
742 UInt32 PointerToSymbolTable;
743 UInt32 NumberOfSymbols;
744 UInt16 SizeOfOptionalHeader;
745 UInt16 Characteristics;
749 #define sizeof_COFF_header 20
756 UInt32 VirtualAddress;
757 UInt32 SizeOfRawData;
758 UInt32 PointerToRawData;
759 UInt32 PointerToRelocations;
760 UInt32 PointerToLinenumbers;
761 UInt16 NumberOfRelocations;
762 UInt16 NumberOfLineNumbers;
763 UInt32 Characteristics;
767 #define sizeof_COFF_section 40
774 UInt16 SectionNumber;
777 UChar NumberOfAuxSymbols;
781 #define sizeof_COFF_symbol 18
786 UInt32 VirtualAddress;
787 UInt32 SymbolTableIndex;
792 #define sizeof_COFF_reloc 10
795 /* From PE spec doc, section 3.3.2 */
796 /* Note use of MYIMAGE_* since IMAGE_* are already defined in
797 windows.h -- for the same purpose, but I want to know what I'm
799 #define MYIMAGE_FILE_RELOCS_STRIPPED 0x0001
800 #define MYIMAGE_FILE_EXECUTABLE_IMAGE 0x0002
801 #define MYIMAGE_FILE_DLL 0x2000
802 #define MYIMAGE_FILE_SYSTEM 0x1000
803 #define MYIMAGE_FILE_BYTES_REVERSED_HI 0x8000
804 #define MYIMAGE_FILE_BYTES_REVERSED_LO 0x0080
805 #define MYIMAGE_FILE_32BIT_MACHINE 0x0100
807 /* From PE spec doc, section 5.4.2 and 5.4.4 */
808 #define MYIMAGE_SYM_CLASS_EXTERNAL 2
809 #define MYIMAGE_SYM_CLASS_STATIC 3
810 #define MYIMAGE_SYM_UNDEFINED 0
812 /* From PE spec doc, section 4.1 */
813 #define MYIMAGE_SCN_CNT_CODE 0x00000020
814 #define MYIMAGE_SCN_CNT_INITIALIZED_DATA 0x00000040
816 /* From PE spec doc, section 5.2.1 */
817 #define MYIMAGE_REL_I386_DIR32 0x0006
818 #define MYIMAGE_REL_I386_REL32 0x0014
821 /* We use myindex to calculate array addresses, rather than
822 simply doing the normal subscript thing. That's because
823 some of the above structs have sizes which are not
824 a whole number of words. GCC rounds their sizes up to a
825 whole number of words, which means that the address calcs
826 arising from using normal C indexing or pointer arithmetic
827 are just plain wrong. Sigh.
830 myindex ( int scale, void* base, int index )
833 ((UChar*)base) + scale * index;
838 printName ( UChar* name, UChar* strtab )
840 if (name[0]==0 && name[1]==0 && name[2]==0 && name[3]==0) {
841 UInt32 strtab_offset = * (UInt32*)(name+4);
842 fprintf ( stderr, "%s", strtab + strtab_offset );
845 for (i = 0; i < 8; i++) {
846 if (name[i] == 0) break;
847 fprintf ( stderr, "%c", name[i] );
854 copyName ( UChar* name, UChar* strtab, UChar* dst, int dstSize )
856 if (name[0]==0 && name[1]==0 && name[2]==0 && name[3]==0) {
857 UInt32 strtab_offset = * (UInt32*)(name+4);
858 strncpy ( dst, strtab+strtab_offset, dstSize );
864 if (name[i] == 0) break;
874 cstring_from_COFF_symbol_name ( UChar* name, UChar* strtab )
877 /* If the string is longer than 8 bytes, look in the
878 string table for it -- this will be correctly zero terminated.
880 if (name[0]==0 && name[1]==0 && name[2]==0 && name[3]==0) {
881 UInt32 strtab_offset = * (UInt32*)(name+4);
882 return ((UChar*)strtab) + strtab_offset;
884 /* Otherwise, if shorter than 8 bytes, return the original,
885 which by defn is correctly terminated.
887 if (name[7]==0) return name;
888 /* The annoying case: 8 bytes. Copy into a temporary
889 (which is never freed ...)
891 newstr = stgMallocBytes(9, "cstring_from_COFF_symbol_name");
893 strncpy(newstr,name,8);
899 /* Just compares the short names (first 8 chars) */
900 static COFF_section *
901 findPEi386SectionCalled ( ObjectCode* oc, char* name )
905 = (COFF_header*)(oc->image);
908 ((UChar*)(oc->image))
909 + sizeof_COFF_header + hdr->SizeOfOptionalHeader
911 for (i = 0; i < hdr->NumberOfSections; i++) {
914 COFF_section* section_i
916 myindex ( sizeof_COFF_section, sectab, i );
917 n1 = (UChar*) &(section_i->Name);
919 if (n1[0]==n2[0] && n1[1]==n2[1] && n1[2]==n2[2] &&
920 n1[3]==n2[3] && n1[4]==n2[4] && n1[5]==n2[5] &&
921 n1[6]==n2[6] && n1[7]==n2[7])
930 zapTrailingAtSign ( UChar* sym )
932 # define my_isdigit(c) ((c) >= '0' && (c) <= '9')
934 if (sym[0] == 0) return;
936 while (sym[i] != 0) i++;
939 while (j > 0 && my_isdigit(sym[j])) j--;
940 if (j > 0 && sym[j] == '@' && j != i) sym[j] = 0;
946 ocVerifyImage_PEi386 ( ObjectCode* oc )
950 COFF_section* sectab;
954 hdr = (COFF_header*)(oc->image);
955 sectab = (COFF_section*) (
956 ((UChar*)(oc->image))
957 + sizeof_COFF_header + hdr->SizeOfOptionalHeader
959 symtab = (COFF_symbol*) (
960 ((UChar*)(oc->image))
961 + hdr->PointerToSymbolTable
963 strtab = ((UChar*)symtab)
964 + hdr->NumberOfSymbols * sizeof_COFF_symbol;
966 if (hdr->Machine != 0x14c) {
967 belch("Not x86 PEi386");
970 if (hdr->SizeOfOptionalHeader != 0) {
971 belch("PEi386 with nonempty optional header");
974 if ( /* (hdr->Characteristics & MYIMAGE_FILE_RELOCS_STRIPPED) || */
975 (hdr->Characteristics & MYIMAGE_FILE_EXECUTABLE_IMAGE) ||
976 (hdr->Characteristics & MYIMAGE_FILE_DLL) ||
977 (hdr->Characteristics & MYIMAGE_FILE_SYSTEM) ) {
978 belch("Not a PEi386 object file");
981 if ( (hdr->Characteristics & MYIMAGE_FILE_BYTES_REVERSED_HI)
982 /* || !(hdr->Characteristics & MYIMAGE_FILE_32BIT_MACHINE) */ ) {
983 belch("Invalid PEi386 word size or endiannness: %d",
984 (int)(hdr->Characteristics));
987 /* fprintf(stderr, "strtab size %d\n", * (UInt32*)strtab); */
988 if (* (UInt32*)strtab > 510000) {
989 belch("PEi386 object has suspiciously large string table; > 64k relocs?");
993 /* No further verification after this point; only debug printing. */
995 IF_DEBUG(linker, i=1);
996 if (i == 0) return 1;
999 "sectab offset = %d\n", ((UChar*)sectab) - ((UChar*)hdr) );
1001 "symtab offset = %d\n", ((UChar*)symtab) - ((UChar*)hdr) );
1003 "strtab offset = %d\n", ((UChar*)strtab) - ((UChar*)hdr) );
1005 fprintf ( stderr, "\n" );
1007 "Machine: 0x%x\n", (UInt32)(hdr->Machine) );
1009 "# sections: %d\n", (UInt32)(hdr->NumberOfSections) );
1011 "time/date: 0x%x\n", (UInt32)(hdr->TimeDateStamp) );
1013 "symtab offset: %d\n", (UInt32)(hdr->PointerToSymbolTable) );
1015 "# symbols: %d\n", (UInt32)(hdr->NumberOfSymbols) );
1017 "sz of opt hdr: %d\n", (UInt32)(hdr->SizeOfOptionalHeader) );
1019 "characteristics: 0x%x\n", (UInt32)(hdr->Characteristics) );
1021 /* Print the section table. */
1022 fprintf ( stderr, "\n" );
1023 for (i = 0; i < hdr->NumberOfSections; i++) {
1025 COFF_section* sectab_i
1027 myindex ( sizeof_COFF_section, sectab, i );
1034 printName ( sectab_i->Name, strtab );
1043 sectab_i->VirtualSize,
1044 sectab_i->VirtualAddress,
1045 sectab_i->SizeOfRawData,
1046 sectab_i->PointerToRawData,
1047 sectab_i->NumberOfRelocations,
1048 sectab_i->PointerToRelocations
1050 reltab = (COFF_reloc*) (
1051 ((UChar*)(oc->image)) + sectab_i->PointerToRelocations
1054 for (j = 0; j < sectab_i->NumberOfRelocations; j++) {
1056 COFF_reloc* rel = (COFF_reloc*)
1057 myindex ( sizeof_COFF_reloc, reltab, j );
1059 " type 0x%-4x vaddr 0x%-8x name `",
1061 rel->VirtualAddress );
1062 sym = (COFF_symbol*)
1063 myindex ( sizeof_COFF_symbol, symtab, rel->SymbolTableIndex );
1064 printName ( sym->Name, strtab -10 );
1065 fprintf ( stderr, "'\n" );
1067 fprintf ( stderr, "\n" );
1070 fprintf ( stderr, "\n" );
1071 fprintf ( stderr, "string table has size 0x%x\n", * (UInt32*)strtab );
1072 fprintf ( stderr, "---START of string table---\n");
1073 for (i = 4; i < *(Int32*)strtab; i++) {
1075 fprintf ( stderr, "\n"); else
1076 fprintf( stderr, "%c", strtab[i] );
1078 fprintf ( stderr, "--- END of string table---\n");
1080 fprintf ( stderr, "\n" );
1083 COFF_symbol* symtab_i;
1084 if (i >= (Int32)(hdr->NumberOfSymbols)) break;
1085 symtab_i = (COFF_symbol*)
1086 myindex ( sizeof_COFF_symbol, symtab, i );
1092 printName ( symtab_i->Name, strtab );
1101 (Int32)(symtab_i->SectionNumber) - 1,
1102 (UInt32)symtab_i->Type,
1103 (UInt32)symtab_i->StorageClass,
1104 (UInt32)symtab_i->NumberOfAuxSymbols
1106 i += symtab_i->NumberOfAuxSymbols;
1110 fprintf ( stderr, "\n" );
1116 ocGetNames_PEi386 ( ObjectCode* oc )
1119 COFF_section* sectab;
1120 COFF_symbol* symtab;
1127 hdr = (COFF_header*)(oc->image);
1128 sectab = (COFF_section*) (
1129 ((UChar*)(oc->image))
1130 + sizeof_COFF_header + hdr->SizeOfOptionalHeader
1132 symtab = (COFF_symbol*) (
1133 ((UChar*)(oc->image))
1134 + hdr->PointerToSymbolTable
1136 strtab = ((UChar*)(oc->image))
1137 + hdr->PointerToSymbolTable
1138 + hdr->NumberOfSymbols * sizeof_COFF_symbol;
1140 /* Copy exported symbols into the ObjectCode. */
1142 oc->n_symbols = hdr->NumberOfSymbols;
1143 oc->symbols = stgMallocBytes(oc->n_symbols * sizeof(char*),
1144 "ocGetNames_PEi386(oc->symbols)");
1145 /* Call me paranoid; I don't care. */
1146 for (i = 0; i < oc->n_symbols; i++)
1147 oc->symbols[i] = NULL;
1151 COFF_symbol* symtab_i;
1152 if (i >= (Int32)(hdr->NumberOfSymbols)) break;
1153 symtab_i = (COFF_symbol*)
1154 myindex ( sizeof_COFF_symbol, symtab, i );
1156 if (symtab_i->StorageClass == MYIMAGE_SYM_CLASS_EXTERNAL &&
1157 symtab_i->SectionNumber != MYIMAGE_SYM_UNDEFINED) {
1159 /* This symbol is global and defined, viz, exported */
1160 COFF_section* sectabent;
1162 /* cstring_from_COFF_symbol_name always succeeds. */
1163 sname = cstring_from_COFF_symbol_name ( symtab_i->Name, strtab );
1165 /* for MYIMAGE_SYMCLASS_EXTERNAL
1166 && !MYIMAGE_SYM_UNDEFINED,
1167 the address of the symbol is:
1168 address of relevant section + offset in section
1170 sectabent = (COFF_section*)
1171 myindex ( sizeof_COFF_section,
1173 symtab_i->SectionNumber-1 );
1174 addr = ((UChar*)(oc->image))
1175 + (sectabent->PointerToRawData
1177 IF_DEBUG(linker, belch("addSymbol %p `%s'\n", addr,sname);)
1178 ASSERT(i >= 0 && i < oc->n_symbols);
1179 oc->symbols[i] = sname;
1180 insertStrHashTable(symhash, sname, addr);
1182 i += symtab_i->NumberOfAuxSymbols;
1186 /* Copy section information into the ObjectCode. */
1188 oc->n_sections = hdr->NumberOfSections;
1189 oc->sections = stgMallocBytes( oc->n_sections * sizeof(Section),
1190 "ocGetNamesPEi386" );
1192 for (i = 0; i < oc->n_sections; i++) {
1197 = SECTIONKIND_OTHER;
1198 COFF_section* sectab_i
1200 myindex ( sizeof_COFF_section, sectab, i );
1201 IF_DEBUG(linker, belchf("section name = %s\n", sectab_i->Name ));
1204 /* I'm sure this is the Right Way to do it. However, the
1205 alternative of testing the sectab_i->Name field seems to
1206 work ok with Cygwin.
1208 if (sectab_i->Characteristics & MYIMAGE_SCN_CNT_CODE ||
1209 sectab_i->Characteristics & MYIMAGE_SCN_CNT_INITIALIZED_DATA)
1210 kind = SECTIONKIND_CODE_OR_RODATA;
1213 if (0==strcmp(".text",sectab_i->Name))
1214 kind = SECTIONKIND_CODE_OR_RODATA;
1215 if (0==strcmp(".data",sectab_i->Name) ||
1216 0==strcmp(".bss",sectab_i->Name))
1217 kind = SECTIONKIND_RWDATA;
1219 start = ((UChar*)(oc->image))
1220 + sectab_i->PointerToRawData;
1222 + sectab_i->SizeOfRawData - 1;
1224 if (kind == SECTIONKIND_OTHER) {
1225 belch("Unknown PEi386 section name `%s'", sectab_i->Name);
1229 oc->sections[i].start = start;
1230 oc->sections[i].end = end;
1231 oc->sections[i].kind = kind;
1239 ocResolve_PEi386 ( ObjectCode* oc )
1242 COFF_section* sectab;
1243 COFF_symbol* symtab;
1252 /* ToDo: should be variable-sized? But is at least safe in the
1253 sense of buffer-overrun-proof. */
1255 /* fprintf(stderr, "resolving for %s\n", oc->fileName); */
1257 hdr = (COFF_header*)(oc->image);
1258 sectab = (COFF_section*) (
1259 ((UChar*)(oc->image))
1260 + sizeof_COFF_header + hdr->SizeOfOptionalHeader
1262 symtab = (COFF_symbol*) (
1263 ((UChar*)(oc->image))
1264 + hdr->PointerToSymbolTable
1266 strtab = ((UChar*)(oc->image))
1267 + hdr->PointerToSymbolTable
1268 + hdr->NumberOfSymbols * sizeof_COFF_symbol;
1270 for (i = 0; i < hdr->NumberOfSections; i++) {
1271 COFF_section* sectab_i
1273 myindex ( sizeof_COFF_section, sectab, i );
1276 ((UChar*)(oc->image)) + sectab_i->PointerToRelocations
1278 for (j = 0; j < sectab_i->NumberOfRelocations; j++) {
1280 COFF_reloc* reltab_j
1282 myindex ( sizeof_COFF_reloc, reltab, j );
1284 /* the location to patch */
1286 ((UChar*)(oc->image))
1287 + (sectab_i->PointerToRawData
1288 + reltab_j->VirtualAddress
1289 - sectab_i->VirtualAddress )
1291 /* the existing contents of pP */
1293 /* the symbol to connect to */
1294 sym = (COFF_symbol*)
1295 myindex ( sizeof_COFF_symbol,
1296 symtab, reltab_j->SymbolTableIndex );
1299 "reloc sec %2d num %3d: type 0x%-4x "
1300 "vaddr 0x%-8x name `",
1302 (UInt32)reltab_j->Type,
1303 reltab_j->VirtualAddress );
1304 printName ( sym->Name, strtab );
1305 fprintf ( stderr, "'\n" ));
1307 if (sym->StorageClass == MYIMAGE_SYM_CLASS_STATIC) {
1308 COFF_section* section_sym
1309 = findPEi386SectionCalled ( oc, sym->Name );
1311 fprintf ( stderr, "bad section = `%s'\n", sym->Name );
1312 barf("Can't find abovementioned PEi386 section");
1315 S = ((UInt32)(oc->image))
1316 + (section_sym->PointerToRawData
1319 copyName ( sym->Name, strtab, symbol, 1000-1 );
1320 zapTrailingAtSign ( symbol );
1321 (void*)S = lookupLocalSymbol( oc, symbol );
1322 if ((void*)S == NULL)
1323 (void*)S = lookupSymbol( symbol );
1325 belch("ocResolve_PEi386: %s: unknown symbol `%s'",
1326 oc->fileName, symbol);
1331 switch (reltab_j->Type) {
1332 case MYIMAGE_REL_I386_DIR32:
1335 case MYIMAGE_REL_I386_REL32:
1336 /* Tricky. We have to insert a displacement at
1337 pP which, when added to the PC for the _next_
1338 insn, gives the address of the target (S).
1339 Problem is to know the address of the next insn
1340 when we only know pP. We assume that this
1341 literal field is always the last in the insn,
1342 so that the address of the next insn is pP+4
1343 -- hence the constant 4.
1344 Also I don't know if A should be added, but so
1345 far it has always been zero.
1348 *pP = S - ((UInt32)pP) - 4;
1352 "unhandled PEi386 relocation type %d\n",
1354 barf("unhandled PEi386 relocation type");
1361 /* fprintf(stderr, "completed %s\n", oc->fileName); */
1365 #endif /* defined(OBJFORMAT_PEi386) */
1368 /* --------------------------------------------------------------------------
1370 * ------------------------------------------------------------------------*/
1372 #if defined(OBJFORMAT_ELF)
1377 #if defined(sparc_TARGET_ARCH)
1378 # define ELF_TARGET_SPARC /* Used inside <elf.h> */
1384 findElfSection ( void* objImage, Elf32_Word sh_type )
1387 char* ehdrC = (char*)objImage;
1388 Elf32_Ehdr* ehdr = ( Elf32_Ehdr*)ehdrC;
1389 Elf32_Shdr* shdr = (Elf32_Shdr*) (ehdrC + ehdr->e_shoff);
1391 for (i = 0; i < ehdr->e_shnum; i++) {
1392 if (shdr[i].sh_type == sh_type &&
1393 i != ehdr->e_shstrndx) {
1394 ptr = ehdrC + shdr[i].sh_offset;
1403 ocVerifyImage_ELF ( ObjectCode* oc )
1407 int i, j, nent, nstrtab, nsymtabs;
1411 char* ehdrC = (char*)(oc->image);
1412 Elf32_Ehdr* ehdr = ( Elf32_Ehdr*)ehdrC;
1414 if (ehdr->e_ident[EI_MAG0] != ELFMAG0 ||
1415 ehdr->e_ident[EI_MAG1] != ELFMAG1 ||
1416 ehdr->e_ident[EI_MAG2] != ELFMAG2 ||
1417 ehdr->e_ident[EI_MAG3] != ELFMAG3) {
1418 belch("ocVerifyImage_ELF: not an ELF header");
1421 IF_DEBUG(linker,belch( "Is an ELF header" ));
1423 if (ehdr->e_ident[EI_CLASS] != ELFCLASS32) {
1424 belch("ocVerifyImage_ELF: not 32 bit ELF" );
1428 IF_DEBUG(linker,belch( "Is 32 bit ELF" ));
1430 if (ehdr->e_ident[EI_DATA] == ELFDATA2LSB) {
1431 IF_DEBUG(linker,belch( "Is little-endian" ));
1433 if (ehdr->e_ident[EI_DATA] == ELFDATA2MSB) {
1434 IF_DEBUG(linker,belch( "Is big-endian" ));
1436 belch("ocVerifyImage_ELF: unknown endiannness");
1440 if (ehdr->e_type != ET_REL) {
1441 belch("ocVerifyImage_ELF: not a relocatable object (.o) file");
1444 IF_DEBUG(linker, belch( "Is a relocatable object (.o) file" ));
1446 IF_DEBUG(linker,belch( "Architecture is " ));
1447 switch (ehdr->e_machine) {
1448 case EM_386: IF_DEBUG(linker,belch( "x86" )); break;
1449 case EM_SPARC: IF_DEBUG(linker,belch( "sparc" )); break;
1450 default: IF_DEBUG(linker,belch( "unknown" ));
1451 belch("ocVerifyImage_ELF: unknown architecture");
1455 IF_DEBUG(linker,belch(
1456 "\nSection header table: start %d, n_entries %d, ent_size %d",
1457 ehdr->e_shoff, ehdr->e_shnum, ehdr->e_shentsize ));
1459 ASSERT (ehdr->e_shentsize == sizeof(Elf32_Shdr));
1461 shdr = (Elf32_Shdr*) (ehdrC + ehdr->e_shoff);
1463 if (ehdr->e_shstrndx == SHN_UNDEF) {
1464 belch("ocVerifyImage_ELF: no section header string table");
1467 IF_DEBUG(linker,belch( "Section header string table is section %d",
1469 sh_strtab = ehdrC + shdr[ehdr->e_shstrndx].sh_offset;
1472 for (i = 0; i < ehdr->e_shnum; i++) {
1473 IF_DEBUG(linker,fprintf(stderr, "%2d: ", i ));
1474 IF_DEBUG(linker,fprintf(stderr, "type=%2d ", (int)shdr[i].sh_type ));
1475 IF_DEBUG(linker,fprintf(stderr, "size=%4d ", (int)shdr[i].sh_size ));
1476 IF_DEBUG(linker,fprintf(stderr, "offs=%4d ", (int)shdr[i].sh_offset ));
1477 IF_DEBUG(linker,fprintf(stderr, " (%p .. %p) ",
1478 ehdrC + shdr[i].sh_offset,
1479 ehdrC + shdr[i].sh_offset + shdr[i].sh_size - 1));
1481 if (shdr[i].sh_type == SHT_REL) {
1482 IF_DEBUG(linker,fprintf(stderr, "Rel " ));
1483 } else if (shdr[i].sh_type == SHT_RELA) {
1484 IF_DEBUG(linker,fprintf(stderr, "RelA " ));
1486 IF_DEBUG(linker,fprintf(stderr," "));
1489 IF_DEBUG(linker,fprintf(stderr, "sname=%s\n", sh_strtab + shdr[i].sh_name ));
1493 IF_DEBUG(linker,belch( "\nString tables" ));
1496 for (i = 0; i < ehdr->e_shnum; i++) {
1497 if (shdr[i].sh_type == SHT_STRTAB &&
1498 i != ehdr->e_shstrndx) {
1499 IF_DEBUG(linker,belch(" section %d is a normal string table", i ));
1500 strtab = ehdrC + shdr[i].sh_offset;
1505 belch("ocVerifyImage_ELF: no string tables, or too many");
1510 IF_DEBUG(linker,belch( "\nSymbol tables" ));
1511 for (i = 0; i < ehdr->e_shnum; i++) {
1512 if (shdr[i].sh_type != SHT_SYMTAB) continue;
1513 IF_DEBUG(linker,belch( "section %d is a symbol table", i ));
1515 stab = (Elf32_Sym*) (ehdrC + shdr[i].sh_offset);
1516 nent = shdr[i].sh_size / sizeof(Elf32_Sym);
1517 IF_DEBUG(linker,belch( " number of entries is apparently %d (%d rem)",
1519 shdr[i].sh_size % sizeof(Elf32_Sym)
1521 if (0 != shdr[i].sh_size % sizeof(Elf32_Sym)) {
1522 belch("ocVerifyImage_ELF: non-integral number of symbol table entries");
1525 for (j = 0; j < nent; j++) {
1526 IF_DEBUG(linker,fprintf(stderr, " %2d ", j ));
1527 IF_DEBUG(linker,fprintf(stderr, " sec=%-5d size=%-3d val=%5p ",
1528 (int)stab[j].st_shndx,
1529 (int)stab[j].st_size,
1530 (char*)stab[j].st_value ));
1532 IF_DEBUG(linker,fprintf(stderr, "type=" ));
1533 switch (ELF32_ST_TYPE(stab[j].st_info)) {
1534 case STT_NOTYPE: IF_DEBUG(linker,fprintf(stderr, "notype " )); break;
1535 case STT_OBJECT: IF_DEBUG(linker,fprintf(stderr, "object " )); break;
1536 case STT_FUNC : IF_DEBUG(linker,fprintf(stderr, "func " )); break;
1537 case STT_SECTION: IF_DEBUG(linker,fprintf(stderr, "section" )); break;
1538 case STT_FILE: IF_DEBUG(linker,fprintf(stderr, "file " )); break;
1539 default: IF_DEBUG(linker,fprintf(stderr, "? " )); break;
1541 IF_DEBUG(linker,fprintf(stderr, " " ));
1543 IF_DEBUG(linker,fprintf(stderr, "bind=" ));
1544 switch (ELF32_ST_BIND(stab[j].st_info)) {
1545 case STB_LOCAL : IF_DEBUG(linker,fprintf(stderr, "local " )); break;
1546 case STB_GLOBAL: IF_DEBUG(linker,fprintf(stderr, "global" )); break;
1547 case STB_WEAK : IF_DEBUG(linker,fprintf(stderr, "weak " )); break;
1548 default: IF_DEBUG(linker,fprintf(stderr, "? " )); break;
1550 IF_DEBUG(linker,fprintf(stderr, " " ));
1552 IF_DEBUG(linker,fprintf(stderr, "name=%s\n", strtab + stab[j].st_name ));
1556 if (nsymtabs == 0) {
1557 belch("ocVerifyImage_ELF: didn't find any symbol tables");
1566 ocGetNames_ELF ( ObjectCode* oc )
1571 char* ehdrC = (char*)(oc->image);
1572 Elf32_Ehdr* ehdr = (Elf32_Ehdr*)ehdrC;
1573 char* strtab = findElfSection ( ehdrC, SHT_STRTAB );
1574 Elf32_Shdr* shdr = (Elf32_Shdr*) (ehdrC + ehdr->e_shoff);
1575 char* sh_strtab = ehdrC + shdr[ehdr->e_shstrndx].sh_offset;
1577 ASSERT(symhash != NULL);
1580 belch("ocGetNames_ELF: no strtab");
1585 oc->n_sections = ehdr->e_shnum;
1586 oc->sections = stgMallocBytes( oc->n_sections * sizeof(Section),
1587 "ocGetNames_ELF(oc->sections)" );
1589 for (i = 0; i < oc->n_sections; i++) {
1591 /* make a section entry for relevant sections */
1592 SectionKind kind = SECTIONKIND_OTHER;
1593 if (!strcmp(".data",sh_strtab+shdr[i].sh_name) ||
1594 !strcmp(".data1",sh_strtab+shdr[i].sh_name))
1595 kind = SECTIONKIND_RWDATA;
1596 if (!strcmp(".text",sh_strtab+shdr[i].sh_name) ||
1597 !strcmp(".rodata",sh_strtab+shdr[i].sh_name) ||
1598 !strcmp(".rodata1",sh_strtab+shdr[i].sh_name))
1599 kind = SECTIONKIND_CODE_OR_RODATA;
1601 /* fill in the section info */
1602 oc->sections[i].start = ehdrC + shdr[i].sh_offset;
1603 oc->sections[i].end = ehdrC + shdr[i].sh_offset + shdr[i].sh_size - 1;
1604 oc->sections[i].kind = kind;
1606 if (shdr[i].sh_type != SHT_SYMTAB) continue;
1608 /* copy stuff into this module's object symbol table */
1609 stab = (Elf32_Sym*) (ehdrC + shdr[i].sh_offset);
1610 nent = shdr[i].sh_size / sizeof(Elf32_Sym);
1612 oc->n_symbols = nent;
1613 oc->symbols = stgMallocBytes(oc->n_symbols * sizeof(char*),
1614 "ocGetNames_ELF(oc->symbols)");
1616 for (j = 0; j < nent; j++) {
1617 if ( ( ELF32_ST_BIND(stab[j].st_info)==STB_GLOBAL
1618 || ELF32_ST_BIND(stab[j].st_info)==STB_LOCAL
1620 /* and not an undefined symbol */
1621 && stab[j].st_shndx != SHN_UNDEF
1622 /* and not in a "special section" */
1623 && stab[j].st_shndx < SHN_LORESERVE
1625 /* and it's a not a section or string table or anything silly */
1626 ( ELF32_ST_TYPE(stab[j].st_info)==STT_FUNC ||
1627 ELF32_ST_TYPE(stab[j].st_info)==STT_OBJECT ||
1628 ELF32_ST_TYPE(stab[j].st_info)==STT_NOTYPE
1631 char* nm = strtab + stab[j].st_name;
1633 + shdr[ stab[j].st_shndx ].sh_offset
1637 oc->symbols[j] = nm;
1638 if (ELF32_ST_BIND(stab[j].st_info)==STB_LOCAL) {
1639 IF_DEBUG(linker,belch( "addOTabName(LOCL): %10p %s %s",
1640 ad, oc->fileName, nm ));
1641 insertStrHashTable(oc->lochash, nm, ad);
1643 IF_DEBUG(linker,belch( "addOTabName(GLOB): %10p %s %s",
1644 ad, oc->fileName, nm ));
1645 insertStrHashTable(symhash, nm, ad);
1649 IF_DEBUG(linker,belch( "skipping `%s'",
1650 strtab + stab[j].st_name ));
1653 "skipping bind = %d, type = %d, shndx = %d `%s'\n",
1654 (int)ELF32_ST_BIND(stab[j].st_info),
1655 (int)ELF32_ST_TYPE(stab[j].st_info),
1656 (int)stab[j].st_shndx,
1657 strtab + stab[j].st_name
1660 oc->symbols[j] = NULL;
1669 /* Do ELF relocations which lack an explicit addend. All x86-linux
1670 relocations appear to be of this form. */
1671 static int do_Elf32_Rel_relocations ( ObjectCode* oc, char* ehdrC,
1672 Elf32_Shdr* shdr, int shnum,
1673 Elf32_Sym* stab, char* strtab )
1678 Elf32_Rel* rtab = (Elf32_Rel*) (ehdrC + shdr[shnum].sh_offset);
1679 int nent = shdr[shnum].sh_size / sizeof(Elf32_Rel);
1680 int target_shndx = shdr[shnum].sh_info;
1681 int symtab_shndx = shdr[shnum].sh_link;
1682 stab = (Elf32_Sym*) (ehdrC + shdr[ symtab_shndx ].sh_offset);
1683 targ = (Elf32_Word*)(ehdrC + shdr[ target_shndx ].sh_offset);
1684 IF_DEBUG(linker,belch( "relocations for section %d using symtab %d",
1685 target_shndx, symtab_shndx ));
1686 for (j = 0; j < nent; j++) {
1687 Elf32_Addr offset = rtab[j].r_offset;
1688 Elf32_Word info = rtab[j].r_info;
1690 Elf32_Addr P = ((Elf32_Addr)targ) + offset;
1691 Elf32_Word* pP = (Elf32_Word*)P;
1695 IF_DEBUG(linker,belch( "Rel entry %3d is raw(%6p %6p)",
1696 j, (void*)offset, (void*)info ));
1698 IF_DEBUG(linker,belch( " ZERO" ));
1701 /* First see if it is a nameless local symbol. */
1702 if (stab[ ELF32_R_SYM(info)].st_name == 0) {
1703 symbol = "(noname)";
1705 (ehdrC + shdr[stab[ELF32_R_SYM(info)].st_shndx ].sh_offset
1706 + stab[ELF32_R_SYM(info)].st_value);
1708 /* No? Should be in a symbol table then; first try the
1710 symbol = strtab+stab[ ELF32_R_SYM(info)].st_name;
1711 (void*)S = lookupLocalSymbol( oc, symbol );
1712 if ((void*)S == NULL)
1713 (void*)S = lookupSymbol( symbol );
1716 barf("do_Elf32_Rel_relocations: %s: unknown symbol `%s'",
1717 oc->fileName, symbol);
1719 IF_DEBUG(linker,belch( "`%s' resolves to %p", symbol, (void*)S ));
1721 IF_DEBUG(linker,belch( "Reloc: P = %p S = %p A = %p",
1722 (void*)P, (void*)S, (void*)A ));
1723 switch (ELF32_R_TYPE(info)) {
1724 # ifdef i386_TARGET_ARCH
1725 case R_386_32: *pP = S + A; break;
1726 case R_386_PC32: *pP = S + A - P; break;
1729 fprintf(stderr, "unhandled ELF relocation(Rel) type %d\n",
1730 ELF32_R_TYPE(info));
1731 barf("do_Elf32_Rel_relocations: unhandled ELF relocation type");
1740 /* Do ELF relocations for which explicit addends are supplied.
1741 sparc-solaris relocations appear to be of this form. */
1742 static int do_Elf32_Rela_relocations ( ObjectCode* oc, char* ehdrC,
1743 Elf32_Shdr* shdr, int shnum,
1744 Elf32_Sym* stab, char* strtab )
1749 Elf32_Rela* rtab = (Elf32_Rela*) (ehdrC + shdr[shnum].sh_offset);
1750 int nent = shdr[shnum].sh_size / sizeof(Elf32_Rela);
1751 int target_shndx = shdr[shnum].sh_info;
1752 int symtab_shndx = shdr[shnum].sh_link;
1753 stab = (Elf32_Sym*) (ehdrC + shdr[ symtab_shndx ].sh_offset);
1754 targ = (Elf32_Word*)(ehdrC + shdr[ target_shndx ].sh_offset);
1755 IF_DEBUG(linker,belch( "relocations for section %d using symtab %d",
1756 target_shndx, symtab_shndx ));
1757 for (j = 0; j < nent; j++) {
1758 Elf32_Addr offset = rtab[j].r_offset;
1759 Elf32_Word info = rtab[j].r_info;
1760 Elf32_Sword addend = rtab[j].r_addend;
1762 Elf32_Addr P = ((Elf32_Addr)targ) + offset;
1763 Elf32_Addr A = addend;
1765 # if defined(sparc_TARGET_ARCH)
1766 /* This #ifdef only serves to avoid unused-var warnings. */
1767 Elf32_Word* pP = (Elf32_Word*)P;
1771 IF_DEBUG(linker,belch( "Rel entry %3d is raw(%6p %6p %6p) ",
1772 j, (void*)offset, (void*)info,
1775 IF_DEBUG(linker,belch( " ZERO" ));
1778 /* First see if it is a nameless local symbol. */
1779 if (stab[ ELF32_R_SYM(info)].st_name == 0) {
1780 symbol = "(noname)";
1782 (ehdrC + shdr[stab[ELF32_R_SYM(info)].st_shndx ].sh_offset
1783 + stab[ELF32_R_SYM(info)].st_value);
1785 /* No? Should be in a symbol table then; first try the
1787 symbol = strtab+stab[ ELF32_R_SYM(info)].st_name;
1788 (void*)S = lookupLocalSymbol( oc, symbol );
1789 if ((void*)S == NULL)
1790 (void*)S = lookupSymbol( symbol );
1793 barf("do_Elf32_Rela_relocations: %s: unknown symbol `%s'",
1794 oc->fileName, symbol);
1797 fprintf ( stderr, "S %p A %p S+A %p S+A-P %p\n",S,A,S+A,S+A-P);
1800 IF_DEBUG(linker,belch( "`%s' resolves to %p", symbol, (void*)S ));
1802 IF_DEBUG(linker,fprintf ( stderr, "Reloc: P = %p S = %p A = %p\n",
1803 (void*)P, (void*)S, (void*)A ));
1804 switch (ELF32_R_TYPE(info)) {
1805 # if defined(sparc_TARGET_ARCH)
1806 case R_SPARC_WDISP30:
1807 w1 = *pP & 0xC0000000;
1808 w2 = (Elf32_Word)((S + A - P) >> 2);
1809 ASSERT((w2 & 0xC0000000) == 0);
1814 w1 = *pP & 0xFFC00000;
1815 w2 = (Elf32_Word)((S + A) >> 10);
1816 ASSERT((w2 & 0xFFC00000) == 0);
1822 w2 = (Elf32_Word)((S + A) & 0x3FF);
1823 ASSERT((w2 & ~0x3FF) == 0);
1828 w2 = (Elf32_Word)(S + A);
1833 fprintf(stderr, "unhandled ELF relocation(RelA) type %d\n",
1834 ELF32_R_TYPE(info));
1835 barf("do_Elf32_Rela_relocations: unhandled ELF relocation type");
1845 ocResolve_ELF ( ObjectCode* oc )
1849 Elf32_Sym* stab = NULL;
1850 char* ehdrC = (char*)(oc->image);
1851 Elf32_Ehdr* ehdr = (Elf32_Ehdr*) ehdrC;
1852 Elf32_Shdr* shdr = (Elf32_Shdr*) (ehdrC + ehdr->e_shoff);
1854 /* first find "the" symbol table */
1855 stab = (Elf32_Sym*) findElfSection ( ehdrC, SHT_SYMTAB );
1857 /* also go find the string table */
1858 strtab = findElfSection ( ehdrC, SHT_STRTAB );
1860 if (stab == NULL || strtab == NULL) {
1861 belch("ocResolve_ELF: can't find string or symbol table");
1865 /* Process the relocation sections. */
1866 for (shnum = 0; shnum < ehdr->e_shnum; shnum++) {
1867 if (shdr[shnum].sh_type == SHT_REL ) {
1868 ok = do_Elf32_Rel_relocations ( oc, ehdrC, shdr,
1869 shnum, stab, strtab );
1873 if (shdr[shnum].sh_type == SHT_RELA) {
1874 ok = do_Elf32_Rela_relocations ( oc, ehdrC, shdr,
1875 shnum, stab, strtab );
1880 /* Free the local symbol table; we won't need it again. */
1881 freeHashTable(oc->lochash, NULL);