1 /* -*- tab-width: 8; c-basic-offset: 2 -*- */
4 * File stabs.c - read stabs information from the wine executable itself.
6 * Copyright (C) 1996, Eric Youngdale.
7 * 1999, 2000 Eric Pouech
12 #include <sys/types.h>
15 #ifdef HAVE_SYS_MMAN_H
23 #define PATH_MAX _MAX_PATH
28 #if defined(__svr4__) || defined(__sun)
39 #elif defined(__EMX__)
80 struct stab_nlist *n_next;
86 unsigned long n_value;
90 * This is used to keep track of known datatypes so that we don't redefine
91 * them over and over again. It sucks up lots of memory otherwise.
95 struct known_typedef * next;
98 struct datatype * types[1];
101 #define NR_STAB_HASH 521
103 static struct known_typedef * ktd_head[NR_STAB_HASH] = {NULL,};
104 static struct datatype ** curr_types = NULL;
105 static int allocated_types = 0;
107 static unsigned int stab_hash( const char * name )
109 unsigned int hash = 0;
117 hash = (hash << 4) + *p++;
119 if( (tmp = (hash & 0xf0000000)) )
125 return hash % NR_STAB_HASH;
129 static void stab_strcpy(char * dest, int sz, const char * source)
132 * A strcpy routine that stops when we hit the ':' character.
133 * Faster than copying the whole thing, and then nuking the
136 while(*source != '\0' && *source != ':' && sz-- > 0)
146 struct datatype** vector;
150 #define MAX_INCLUDES 256
152 static include_def* include_defs = NULL;
153 static int num_include_def = 0;
154 static int num_alloc_include_def = 0;
155 static int cu_include_stack[MAX_INCLUDES];
156 static int cu_include_stk_idx = 0;
157 static struct datatype** cu_vector = NULL;
158 static int cu_nrofentries = 0;
162 DEBUG_CreateInclude(const char* file, unsigned long val)
164 if (num_include_def == num_alloc_include_def)
166 num_alloc_include_def += 256;
167 include_defs = DBG_realloc(include_defs, sizeof(include_defs[0])*num_alloc_include_def);
168 memset(include_defs+num_include_def, 0, sizeof(include_defs[0])*256);
170 include_defs[num_include_def].name = DBG_strdup(file);
171 include_defs[num_include_def].value = val;
172 include_defs[num_include_def].vector = NULL;
173 include_defs[num_include_def].nrofentries = 0;
175 return num_include_def++;
180 DEBUG_FindInclude(const char* file, unsigned long val)
184 for (i = 0; i < num_include_def; i++)
186 if (val == include_defs[i].value &&
187 strcmp(file, include_defs[i].name) == 0)
195 DEBUG_AddInclude(int idx)
197 ++cu_include_stk_idx;
199 /* is this happen, just bump MAX_INCLUDES */
200 /* we could also handle this as another dynarray */
201 assert(cu_include_stk_idx < MAX_INCLUDES);
203 cu_include_stack[cu_include_stk_idx] = idx;
204 return cu_include_stk_idx;
209 DEBUG_ResetIncludes(void)
212 * The datatypes that we would need to use are reset when
213 * we start a new file. (at least the ones in filenr == 0
215 cu_include_stk_idx = 0;/* keep 0 as index for the .c file itself */
216 memset(cu_vector, 0, sizeof(cu_vector[0]) * cu_nrofentries);
221 DEBUG_FreeIncludes(void)
225 DEBUG_ResetIncludes();
227 for (i = 0; i < num_include_def; i++)
229 DBG_free(include_defs[i].name);
230 DBG_free(include_defs[i].vector);
232 DBG_free(include_defs);
235 num_alloc_include_def = 0;
243 DEBUG_FileSubNr2StabEnum(int filenr, int subnr)
245 struct datatype** ret;
247 /* DEBUG_Printf(DBG_CHN_MESG, "creating type id for (%d,%d)\n", filenr, subnr); */
249 /* FIXME: I could perhaps create a dummy include_def for each compilation
250 * unit which would allow not to handle those two cases separately
254 if (cu_nrofentries <= subnr)
256 cu_vector = DBG_realloc(cu_vector, sizeof(cu_vector[0])*(subnr+1));
257 memset(cu_vector+cu_nrofentries, 0, sizeof(cu_vector[0])*(subnr+1-cu_nrofentries));
258 cu_nrofentries = subnr + 1;
260 ret = &cu_vector[subnr];
266 assert(filenr <= cu_include_stk_idx);
268 idef = &include_defs[cu_include_stack[filenr]];
270 if (idef->nrofentries <= subnr)
272 idef->vector = DBG_realloc(idef->vector, sizeof(idef->vector[0])*(subnr+1));
273 memset(idef->vector + idef->nrofentries, 0, sizeof(idef->vector[0])*(subnr+1-idef->nrofentries));
274 idef->nrofentries = subnr + 1;
276 ret = &idef->vector[subnr];
278 /* DEBUG_Printf(DBG_CHN_MESG,"(%d,%d) is %d\n",filenr,subnr,ret); */
284 DEBUG_ReadTypeEnumBackwards(char*x) {
291 filenr=strtol(x,&x,10); /* <int> */
293 subnr=strtol(x,&x,10); /* <int> */
296 while ((*x>='0') && (*x<='9'))
301 return DEBUG_FileSubNr2StabEnum(filenr,subnr);
306 DEBUG_ReadTypeEnum(char **x) {
311 filenr=strtol(*x,x,10); /* <int> */
313 subnr=strtol(*x,x,10); /* <int> */
317 subnr = strtol(*x,x,10); /* <int> */
319 return DEBUG_FileSubNr2StabEnum(filenr,subnr);
324 DEBUG_RegisterTypedef(const char * name, struct datatype ** types, int ndef)
327 struct known_typedef * ktd;
332 ktd = (struct known_typedef *) DBG_alloc(sizeof(struct known_typedef)
333 + (ndef - 1) * sizeof(struct datatype *));
335 hash = stab_hash(name);
337 ktd->name = DBG_strdup(name);
339 memcpy(&ktd->types[0], types, ndef * sizeof(struct datatype *));
340 ktd->next = ktd_head[hash];
341 ktd_head[hash] = ktd;
348 DEBUG_HandlePreviousTypedef(const char * name, const char * stab)
351 enum debug_type expect;
353 struct known_typedef * ktd;
356 hash = stab_hash(name);
358 for(ktd = ktd_head[hash]; ktd; ktd = ktd->next)
359 if ((ktd->name[0] == name[0]) && (strcmp(name, ktd->name) == 0) )
363 * Didn't find it. This must be a new one.
369 * Examine the stab to make sure it has the same number of definitions.
372 for(ptr = strchr(stab, '='); ptr; ptr = strchr(ptr+1, '='))
374 if( count >= ktd->ndefs )
378 * Make sure the types of all of the objects is consistent with
379 * what we have already parsed.
393 case '(': /* it's mainly a ref to another typedef, skip it */
410 DEBUG_Printf(DBG_CHN_FIXME, "Unknown type (%c).\n",ptr[1]);
413 if( expect != -1 && expect != DEBUG_GetType(ktd->types[count]) )
418 if( ktd->ndefs != count )
422 * Go through, dig out all of the type numbers, and substitute the
423 * appropriate things.
426 for(ptr = strchr(stab, '='); ptr; ptr = strchr(ptr+1, '='))
427 *DEBUG_ReadTypeEnumBackwards(ptr-1) = ktd->types[count++];
432 static int DEBUG_FreeRegisteredTypedefs(void)
436 struct known_typedef * ktd;
437 struct known_typedef * next;
440 for(j=0; j < NR_STAB_HASH; j++ )
442 for(ktd = ktd_head[j]; ktd; ktd = next)
458 DEBUG_ParseTypedefStab(char * ptr, const char * typename)
463 struct datatype * curr_type;
464 struct datatype * datatype;
465 char element_name[1024];
468 const char * orig_typename;
474 orig_typename = typename;
476 if( DEBUG_HandlePreviousTypedef(typename, ptr) )
480 * Go from back to front. First we go through and figure out what
481 * type numbers we need, and register those types. Then we go in
482 * and fill the details.
485 for( c = strchr(ptr, '='); c != NULL; c = strchr(c + 1, '=') )
488 * Back up until we get to a non-numeric character, to get datatype
490 struct datatype** dt = DEBUG_ReadTypeEnumBackwards(c-1);
492 if( ntypes >= allocated_types )
494 allocated_types += 64;
495 curr_types = DBG_realloc(curr_types, sizeof(struct datatype*) * allocated_types);
496 if (!curr_types) return FALSE;
502 *dt = DEBUG_NewDataType(DT_POINTER, NULL);
503 curr_types[ntypes++] = *dt;
507 *dt = DEBUG_NewDataType(DT_STRUCT, typename);
508 curr_types[ntypes++] = *dt;
511 *dt = DEBUG_NewDataType(DT_ARRAY, NULL);
512 curr_types[ntypes++] = *dt;
515 /* will be handled in next loop,
516 * just a ref to another type
518 curr_types[ntypes++] = NULL;
522 *dt = DEBUG_NewDataType(DT_BASIC, typename);
523 curr_types[ntypes++] = *dt;
526 stab_strcpy(element_name, sizeof(element_name), c + 3);
527 *dt = DEBUG_NewDataType(DT_STRUCT, element_name);
528 curr_types[ntypes++] = *dt;
531 *dt = DEBUG_NewDataType(DT_ENUM, NULL);
532 curr_types[ntypes++] = *dt;
535 *dt = DEBUG_NewDataType(DT_FUNC, NULL);
536 curr_types[ntypes++] = *dt;
539 DEBUG_Printf(DBG_CHN_FIXME, "Unknown type (%c).\n",c[1]);
548 * OK, now take a second sweep through. Now we will be digging
549 * out the definitions of the various components, and storing
550 * them in the skeletons that we have already allocated. We take
551 * a right-to left search as this is much easier to parse.
553 for( c = strrchr(ptr, '='); c != NULL; c = strrchr(ptr, '=') )
555 struct datatype** dt = DEBUG_ReadTypeEnumBackwards(c-1);
556 struct datatype** dt2;
577 datatype = *DEBUG_ReadTypeEnum(&tc);
578 DEBUG_SetPointerType(curr_type, datatype);
586 dt2 = DEBUG_ReadTypeEnum(&tc);
592 else if (!*dt && !*dt2)
594 /* this should be a basic type, define it */
595 *dt2 = *dt = DEBUG_NewDataType(DT_BASIC, typename);
599 DEBUG_Printf(DBG_CHN_MESG, "Unknown condition %08lx %08lx (%s)\n",
600 (unsigned long)*dt, (unsigned long)*dt2, ptr);
606 curr_types[ntp--] = *dt;
612 * We have already handled these above.
618 /* ar<typeinfo_nodef>;<int>;<int>;<typeinfo>,<int>,<int>;; */
622 DEBUG_ReadTypeEnum(&tc);
624 arrmin = strtol(tc, &tc, 10); /* <int> */
626 arrmax = strtol(tc, &tc, 10); /* <int> */
628 datatype = *DEBUG_ReadTypeEnum(&tc); /* <typeinfo> */
633 DEBUG_SetArrayParams(curr_type, arrmin, arrmax, datatype);
641 if( DEBUG_SetStructSize(curr_type, strtol(tc, &tc, 10)) == FALSE )
644 * We have already filled out this structure. Nothing to do,
645 * so just skip forward to the end of the definition.
647 while( tc[0] != ';' && tc[1] != ';' )
660 * Now parse the individual elements of the structure/union.
671 datatype = *DEBUG_ReadTypeEnum(&tc);
674 offset = strtol(tc, &tc, 10);
676 size = strtol(tc, &tc, 10);
679 DEBUG_AddStructElement(curr_type, element_name, datatype,
684 /* ... but proceed parsing to the end of the stab */
685 DEBUG_Printf(DBG_CHN_MESG, "failure on %s %s\n", ptr, ti);
692 /* if we had a undeclared value this one is undeclared too.
693 * remove it from the stab_types.
694 * I just set it to NULL to detect bugs in my thoughtprocess.
695 * FIXME: leaks the memory for the structure elements.
696 * FIXME: such structures should have been optimized away
710 * Now parse the individual elements of the structure/union.
719 offset = strtol(tc, &tc, 10);
721 DEBUG_AddStructElement(curr_type, element_name, NULL, offset, 0);
729 DEBUG_Printf(DBG_CHN_FIXME, "Unknown type (%c).\n",c[1]);
734 * Now register the type so that if we encounter it again, we will know
737 DEBUG_RegisterTypedef(orig_typename, curr_types, ntypes);
742 static struct datatype *
743 DEBUG_ParseStabType(const char * stab)
748 * Look through the stab definition, and figure out what datatype
749 * this represents. If we have something we know about, assign the
752 c = strchr(stab, ':');
758 * The next character says more about the type (i.e. data, function, etc)
759 * of symbol. Skip it.
764 * The next is either an integer or a (integer,integer).
765 * The DEBUG_ReadTypeEnum takes care that stab_types is large enough.
767 return *DEBUG_ReadTypeEnum(&c);
771 DEBUG_ParseStabs(char * addr, unsigned int load_offset,
772 unsigned int staboff, int stablen,
773 unsigned int strtaboff, int strtablen)
775 struct name_hash * curr_func = NULL;
776 struct wine_locals * curr_loc = NULL;
777 struct name_hash * curr_sym = NULL;
778 char currpath[PATH_MAX];
780 int in_external_file = FALSE;
788 struct stab_nlist * stab_ptr;
791 char * subpath = NULL;
794 nstab = stablen / sizeof(struct stab_nlist);
795 stab_ptr = (struct stab_nlist *) (addr + staboff);
796 strs = (char *) (addr + strtaboff);
798 memset(currpath, 0, sizeof(currpath));
801 * Allocate a buffer into which we can build stab strings for cases
802 * where the stab is continued over multiple lines.
805 stabbuff = (char *) DBG_alloc(stabbufflen);
809 for(i=0; i < nstab; i++, stab_ptr++ )
811 ptr = strs + (unsigned int) stab_ptr->n_un.n_name;
812 if( ptr[strlen(ptr) - 1] == '\\' )
815 * Indicates continuation. Append this to the buffer, and go onto the
816 * next record. Repeat the process until we find a stab without the
817 * '/' character, as this indicates we have the whole thing.
820 if( strlen(stabbuff) + len > stabbufflen )
822 stabbufflen += 65536;
823 stabbuff = (char *) DBG_realloc(stabbuff, stabbufflen);
825 strncat(stabbuff, ptr, len - 1);
828 else if( stabbuff[0] != '\0' )
830 strcat( stabbuff, ptr);
834 if( strchr(ptr, '=') != NULL )
837 * The stabs aren't in writable memory, so copy it over so we are
838 * sure we can scribble on it.
840 if( ptr != stabbuff )
842 strcpy(stabbuff, ptr);
845 stab_strcpy(symname, sizeof(symname), ptr);
846 if (!DEBUG_ParseTypedefStab(ptr, symname)) {
847 /* skip this definition */
853 switch(stab_ptr->n_type)
857 * These are useless with ELF. They have no value, and you have to
858 * read the normal symbol table to get the address. Thus we
859 * ignore them, and when we process the normal symbol table
860 * we should do the right thing.
862 * With a.out or mingw, they actually do make some amount of sense.
864 new_value.addr.seg = 0;
865 new_value.type = DEBUG_ParseStabType(ptr);
866 new_value.addr.off = load_offset + stab_ptr->n_value;
867 new_value.cookie = DV_TARGET;
869 stab_strcpy(symname, sizeof(symname), ptr);
871 curr_sym = DEBUG_AddSymbol( symname, &new_value, currpath,
872 SYM_WINE | SYM_DATA | SYM_INVALID );
874 curr_sym = DEBUG_AddSymbol( symname, &new_value, currpath,
875 SYM_WINE | SYM_DATA );
881 * We need to keep track of these so we get symbol scoping
882 * right for local variables. For now, we just ignore them.
883 * The hooks are already there for dealing with this however,
884 * so all we need to do is to keep count of the nesting level,
885 * and find the RBRAC for each matching LBRAC.
891 * These are static symbols and BSS symbols.
893 new_value.addr.seg = 0;
894 new_value.type = DEBUG_ParseStabType(ptr);
895 new_value.addr.off = load_offset + stab_ptr->n_value;
896 new_value.cookie = DV_TARGET;
898 stab_strcpy(symname, sizeof(symname), ptr);
899 curr_sym = DEBUG_AddSymbol( symname, &new_value, currpath,
900 SYM_WINE | SYM_DATA );
904 * These are function parameters.
906 if( curr_func != NULL && !in_external_file )
908 stab_strcpy(symname, sizeof(symname), ptr);
909 curr_loc = DEBUG_AddLocal( curr_func, 0,
910 stab_ptr->n_value, 0, 0, symname );
911 DEBUG_SetLocalSymbolType( curr_loc, DEBUG_ParseStabType(ptr) );
915 if( curr_func != NULL && !in_external_file )
917 stab_strcpy(symname, sizeof(symname), ptr);
918 curr_loc = DEBUG_AddLocal( curr_func, stab_ptr->n_value + 1,
920 DEBUG_SetLocalSymbolType( curr_loc, DEBUG_ParseStabType(ptr) );
924 if( curr_func != NULL && !in_external_file )
926 stab_strcpy(symname, sizeof(symname), ptr);
927 curr_loc = DEBUG_AddLocal( curr_func, 0,
928 stab_ptr->n_value, 0, 0, symname );
929 DEBUG_SetLocalSymbolType( curr_loc, DEBUG_ParseStabType(ptr) );
934 * This is a line number. These are always relative to the start
935 * of the function (N_FUN), and this makes the lookup easier.
937 if( curr_func != NULL && !in_external_file )
940 DEBUG_AddLineNumber(curr_func, stab_ptr->n_desc,
945 * This isn't right. The order of the stabs is different under
946 * a.out, and as a result we would end up attaching the line
947 * number to the wrong function.
949 DEBUG_AddLineNumber(curr_func, stab_ptr->n_desc,
950 stab_ptr->n_value - curr_func->addr.off);
957 * First, clean up the previous function we were working on.
959 DEBUG_Normalize(curr_func);
962 * For now, just declare the various functions. Later
963 * on, we will add the line number information and the
966 if( !in_external_file)
968 stab_strcpy(symname, sizeof(symname), ptr);
971 new_value.addr.seg = 0;
972 new_value.type = DEBUG_ParseStabType(ptr);
973 new_value.addr.off = load_offset + stab_ptr->n_value;
974 new_value.cookie = DV_TARGET;
976 * Copy the string to a temp buffer so we
977 * can kill everything after the ':'. We do
978 * it this way because otherwise we end up dirtying
979 * all of the pages related to the stabs, and that
980 * sucks up swap space like crazy.
982 curr_func = DEBUG_AddSymbol( symname, &new_value, currpath,
983 SYM_WINE | SYM_FUNC);
987 /* some GCC seem to use a N_FUN "" to mark the end of a function */
994 * Don't add line number information for this function
1002 * This indicates a new source file. Append the records
1003 * together, to build the correct path name.
1007 * With a.out, there is no NULL string N_SO entry at the end of
1008 * the file. Thus when we find non-consecutive entries,
1009 * we consider that a new file is started.
1011 if( last_nso < i-1 )
1014 DEBUG_Normalize(curr_func);
1025 DEBUG_Normalize(curr_func);
1031 strcat(currpath, ptr);
1033 strcpy(currpath, ptr);
1035 DEBUG_ResetIncludes();
1041 * This indicates we are including stuff from an include file.
1042 * If this is the main source, enable the debug stuff, otherwise
1045 in_external_file = !(subpath == NULL || strcmp(ptr, subpath) == 0);
1049 strtabinc = stab_ptr->n_value;
1050 DEBUG_Normalize(curr_func);
1055 * Ignore this. We don't care what it points to.
1059 DEBUG_AddInclude(DEBUG_CreateInclude(ptr, stab_ptr->n_value));
1064 DEBUG_AddInclude(DEBUG_FindInclude(ptr, stab_ptr->n_value));
1068 * Always ignore these. GCC doesn't even generate them.
1072 DEBUG_Printf(DBG_CHN_MESG, "Unkown stab type 0x%02x\n", stab_ptr->n_type);
1079 DEBUG_Printf(DBG_CHN_MESG, "%d %x %s\n", stab_ptr->n_type,
1080 (unsigned int) stab_ptr->n_value,
1081 strs + (unsigned int) stab_ptr->n_un.n_name);
1085 DEBUG_FreeRegisteredTypedefs();
1086 DEBUG_FreeIncludes();
1087 DBG_free(curr_types);
1089 allocated_types = 0;
1097 * Walk through the entire symbol table and add any symbols we find there.
1098 * This can be used in cases where we have stripped ELF shared libraries,
1099 * or it can be used in cases where we have data symbols for which the address
1100 * isn't encoded in the stabs.
1102 * This is all really quite easy, since we don't have to worry about line
1103 * numbers or local data variables.
1107 DEBUG_ProcessElfSymtab(char * addr, unsigned int load_offset,
1108 Elf32_Shdr * symtab, Elf32_Shdr * strtab)
1110 char * curfile = NULL;
1111 struct name_hash * curr_sym = NULL;
1114 DBG_VALUE new_value;
1121 symp = (Elf32_Sym *) (addr + symtab->sh_offset);
1122 nsym = symtab->sh_size / sizeof(*symp);
1123 strp = (char *) (addr + strtab->sh_offset);
1125 for(i=0; i < nsym; i++, symp++)
1128 * Ignore certain types of entries which really aren't of that much
1131 if( ELF32_ST_TYPE(symp->st_info) == STT_SECTION ||
1132 symp->st_shndx == STN_UNDEF )
1137 symname = strp + symp->st_name;
1140 * Save the name of the current file, so we have a way of tracking
1141 * static functions/data.
1143 if( ELF32_ST_TYPE(symp->st_info) == STT_FILE )
1150 * See if we already have something for this symbol.
1151 * If so, ignore this entry, because it would have come from the
1152 * stabs or from a previous symbol. If the value is different,
1153 * we will have to keep the darned thing, because there can be
1154 * multiple local symbols by the same name.
1156 if( (DEBUG_GetSymbolValue(symname, -1, &new_value, FALSE ) == TRUE)
1157 && (new_value.addr.off == (load_offset + symp->st_value)) )
1160 new_value.addr.seg = 0;
1161 new_value.type = NULL;
1162 new_value.addr.off = load_offset + symp->st_value;
1163 new_value.cookie = DV_TARGET;
1164 flags = SYM_WINE | (ELF32_ST_BIND(symp->st_info) == STT_FUNC
1165 ? SYM_FUNC : SYM_DATA);
1166 if( ELF32_ST_BIND(symp->st_info) == STB_GLOBAL )
1167 curr_sym = DEBUG_AddSymbol( symname, &new_value, NULL, flags );
1169 curr_sym = DEBUG_AddSymbol( symname, &new_value, curfile, flags );
1172 * Record the size of the symbol. This can come in handy in
1173 * some cases. Not really used yet, however.
1175 if( symp->st_size != 0 )
1176 DEBUG_SetSymbolSize(curr_sym, symp->st_size);
1183 DEBUG_ProcessElfObject(const char * filename, unsigned int load_offset)
1186 char * addr = (char*)0xffffffff;
1188 struct stat statbuf;
1198 * Make sure we can stat and open this file.
1200 if( filename == NULL )
1203 if (stat(filename, &statbuf) == -1)
1205 char *s,*t,*fn,*paths;
1206 if (strchr(filename,'/'))
1208 paths = DBG_strdup(getenv("PATH"));
1213 fn = (char*)DBG_alloc(strlen(filename)+1+strlen(s)+1);
1216 strcat(fn,filename);
1217 if ((rtn = DEBUG_ProcessElfObject(fn,load_offset))) {
1223 if (t) s = t+1; else break;
1225 if (!s || !*s) DEBUG_Printf(DBG_CHN_MESG," not found");
1230 if (DEBUG_FindModuleByName(filename, DM_TYPE_ELF))
1233 DEBUG_Printf(DBG_CHN_MESG, "Loading stabs debug symbols from %s (0x%08x)\n",
1234 filename, load_offset);
1237 * Now open the file, so that we can mmap() it.
1239 if ((fd = open(filename, O_RDONLY)) == -1)
1243 * Now mmap() the file.
1245 addr = mmap(0, statbuf.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
1246 if (addr == (char*)0xffffffff)
1250 * Next, we need to find a few of the internal ELF headers within
1251 * this thing. We need the main executable header, and the section
1254 ehptr = (Elf32_Ehdr *) addr;
1256 if( load_offset == 0 )
1257 DEBUG_RegisterELFModule(ehptr->e_entry, filename);
1259 DEBUG_RegisterELFModule(load_offset, filename);
1261 spnt = (Elf32_Shdr *) (addr + ehptr->e_shoff);
1262 nsect = ehptr->e_shnum;
1263 shstrtab = (addr + spnt[ehptr->e_shstrndx].sh_offset);
1265 stabsect = stabstrsect = -1;
1267 for(i=0; i < nsect; i++)
1269 if( strcmp(shstrtab + spnt[i].sh_name, ".stab") == 0 )
1272 if( strcmp(shstrtab + spnt[i].sh_name, ".stabstr") == 0 )
1276 if( stabsect == -1 || stabstrsect == -1 ) {
1277 DEBUG_Printf(DBG_CHN_WARN, "no .stab section\n");
1282 * OK, now just parse all of the stabs.
1284 if (!(rtn = DEBUG_ParseStabs(addr, load_offset,
1285 spnt[stabsect].sh_offset,
1286 spnt[stabsect].sh_size,
1287 spnt[stabstrsect].sh_offset,
1288 spnt[stabstrsect].sh_size))) {
1289 DEBUG_Printf(DBG_CHN_WARN, "bad stabs\n");
1293 for(i=0; i < nsect; i++)
1295 if( (strcmp(shstrtab + spnt[i].sh_name, ".symtab") == 0)
1296 && (spnt[i].sh_type == SHT_SYMTAB) )
1297 DEBUG_ProcessElfSymtab(addr, load_offset,
1298 spnt + i, spnt + spnt[i].sh_link);
1300 if( (strcmp(shstrtab + spnt[i].sh_name, ".dynsym") == 0)
1301 && (spnt[i].sh_type == SHT_DYNSYM) )
1302 DEBUG_ProcessElfSymtab(addr, load_offset,
1303 spnt + i, spnt + spnt[i].sh_link);
1308 if (addr != (char*)0xffffffff)
1309 munmap(addr, statbuf.st_size);
1311 if (fd != -1) close(fd);
1316 static BOOL DEBUG_WalkList(struct r_debug* dbg_hdr)
1324 * Now walk the linked list. In all known ELF implementations,
1325 * the dynamic loader maintains this linked list for us. In some
1326 * cases the first entry doesn't appear with a name, in other cases it
1329 for (lm_addr = (u_long)dbg_hdr->r_map; lm_addr; lm_addr = (u_long)lm.l_next) {
1330 if (!DEBUG_READ_MEM_VERBOSE((void*)lm_addr, &lm, sizeof(lm)))
1332 if (lm.l_addr != 0 &&
1333 DEBUG_READ_MEM_VERBOSE((void*)lm.l_addr, &ehdr, sizeof(ehdr)) &&
1334 ehdr.e_type == ET_DYN && /* only look at dynamic modules */
1335 lm.l_name != NULL &&
1336 DEBUG_READ_MEM_VERBOSE(lm.l_name, bufstr, sizeof(bufstr))) {
1337 bufstr[sizeof(bufstr) - 1] = '\0';
1338 DEBUG_ProcessElfObject(bufstr, lm.l_addr);
1345 static BOOL DEBUG_RescanElf(void)
1347 struct r_debug dbg_hdr;
1349 if (!DEBUG_CurrProcess ||
1350 !DEBUG_READ_MEM_VERBOSE((void*)DEBUG_CurrProcess->dbg_hdr_addr, &dbg_hdr, sizeof(dbg_hdr)))
1353 switch (dbg_hdr.r_state) {
1355 DEBUG_WalkList(&dbg_hdr);
1360 /*FIXME: this is not currently handled, would need some kind of mark&sweep algo */
1367 DEBUG_ReadExecutableDbgInfo(const char* exe_name)
1370 struct r_debug dbg_hdr;
1375 * Make sure we can stat and open this file.
1377 if (exe_name == NULL) goto leave;
1378 DEBUG_ProcessElfObject(exe_name, 0);
1380 /* previous step should have loaded symbol _DYNAMIC if it exists inside
1381 * the main executable
1383 if (!DEBUG_GetSymbolValue("_DYNAMIC", -1, &val, FALSE)) {
1384 DEBUG_Printf(DBG_CHN_WARN, "Can't find symbol _DYNAMIC\n");
1389 if (!DEBUG_READ_MEM_VERBOSE((void*)val.addr.off, &dyn, sizeof(dyn)))
1391 val.addr.off += sizeof(dyn);
1392 } while (dyn.d_tag != DT_DEBUG && dyn.d_tag != DT_NULL);
1393 if (dyn.d_tag == DT_NULL) goto leave;
1396 * OK, now dig into the actual tables themselves.
1398 if (!DEBUG_READ_MEM_VERBOSE((void*)dyn.d_un.d_ptr, &dbg_hdr, sizeof(dbg_hdr)))
1401 assert(!DEBUG_CurrProcess->dbg_hdr_addr);
1402 DEBUG_CurrProcess->dbg_hdr_addr = (u_long)dyn.d_un.d_ptr;
1404 if (dbg_hdr.r_brk) {
1407 DEBUG_Printf(DBG_CHN_TRACE, "Setting up a breakpoint on r_brk(%lx)\n",
1408 (unsigned long)dbg_hdr.r_brk);
1410 DEBUG_SetBreakpoints(FALSE);
1412 value.cookie = DV_TARGET;
1414 value.addr.off = dbg_hdr.r_brk;
1415 DEBUG_AddBreakpoint(&value, DEBUG_RescanElf);
1416 DEBUG_SetBreakpoints(TRUE);
1419 rtn = DEBUG_WalkList(&dbg_hdr);
1425 #else /* !__ELF__ */
1428 DEBUG_ProcessElfObject(const char * filename, unsigned int load_offset)
1434 DEBUG_ReadExecutableDbgInfo(const char* exe_name)
1439 #endif /* __ELF__ */