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 struct known_typedef
* ktd_head
[NR_STAB_HASH
] = {NULL
,};
105 static unsigned int stab_hash( const char * name
)
107 unsigned int hash
= 0;
115 hash
= (hash
<< 4) + *p
++;
117 if( (tmp
= (hash
& 0xf0000000)) )
123 return hash
% NR_STAB_HASH
;
127 static void stab_strcpy(char * dest
, int sz
, const char * source
)
130 * A strcpy routine that stops when we hit the ':' character.
131 * Faster than copying the whole thing, and then nuking the
134 while(*source
!= '\0' && *source
!= ':' && sz
-- > 0)
144 struct datatype
** vector
;
148 #define MAX_INCLUDES 256
150 static include_def
* include_defs
= NULL
;
151 static int num_include_def
= 0;
152 static int num_alloc_include_def
= 0;
153 static int cu_include_stack
[MAX_INCLUDES
];
154 static int cu_include_stk_idx
= 0;
155 static struct datatype
** cu_vector
= NULL
;
156 static int cu_nrofentries
= 0;
160 DEBUG_CreateInclude(const char* file
, unsigned long val
)
162 if (num_include_def
== num_alloc_include_def
)
164 num_alloc_include_def
+= 256;
165 include_defs
= DBG_realloc(include_defs
, sizeof(include_defs
[0])*num_alloc_include_def
);
166 memset(include_defs
+num_include_def
, 0, sizeof(include_defs
[0])*256);
168 include_defs
[num_include_def
].name
= DBG_strdup(file
);
169 include_defs
[num_include_def
].value
= val
;
170 include_defs
[num_include_def
].vector
= NULL
;
171 include_defs
[num_include_def
].nrofentries
= 0;
173 return num_include_def
++;
178 DEBUG_FindInclude(const char* file
, unsigned long val
)
182 for (i
= 0; i
< num_include_def
; i
++)
184 if (val
== include_defs
[i
].value
&&
185 strcmp(file
, include_defs
[i
].name
) == 0)
193 DEBUG_AddInclude(int idx
)
195 ++cu_include_stk_idx
;
197 /* is this happen, just bump MAX_INCLUDES */
198 /* we could also handle this as another dynarray */
199 assert(cu_include_stk_idx
< MAX_INCLUDES
);
201 cu_include_stack
[cu_include_stk_idx
] = idx
;
202 return cu_include_stk_idx
;
207 DEBUG_ResetIncludes(void)
210 * The datatypes that we would need to use are reset when
211 * we start a new file. (at least the ones in filenr == 0
213 cu_include_stk_idx
= 0;/* keep 0 as index for the .c file itself */
214 memset(cu_vector
, 0, sizeof(cu_vector
[0]) * cu_nrofentries
);
219 DEBUG_FreeIncludes(void)
223 DEBUG_ResetIncludes();
225 for (i
= 0; i
< num_include_def
; i
++)
227 DBG_free(include_defs
[i
].name
);
228 DBG_free(include_defs
[i
].vector
);
230 DBG_free(include_defs
);
233 num_alloc_include_def
= 0;
239 #define MAX_TD_NESTING 128
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 struct datatype
* curr_types
[MAX_TD_NESTING
];
466 char element_name
[1024];
469 const char * orig_typename
;
475 orig_typename
= typename
;
477 if( DEBUG_HandlePreviousTypedef(typename
, ptr
) )
481 * Go from back to front. First we go through and figure out what
482 * type numbers we need, and register those types. Then we go in
483 * and fill the details.
486 for( c
= strchr(ptr
, '='); c
!= NULL
; c
= strchr(c
+ 1, '=') )
489 * Back up until we get to a non-numeric character, to get datatype
491 struct datatype
** dt
= DEBUG_ReadTypeEnumBackwards(c
-1);
493 if( ntypes
>= MAX_TD_NESTING
)
496 * If this ever happens, just bump the counter.
498 DEBUG_Printf(DBG_CHN_MESG
, "Typedef nesting overflow\n");
505 *dt
= DEBUG_NewDataType(DT_POINTER
, NULL
);
506 curr_types
[ntypes
++] = *dt
;
510 *dt
= DEBUG_NewDataType(DT_STRUCT
, typename
);
511 curr_types
[ntypes
++] = *dt
;
514 *dt
= DEBUG_NewDataType(DT_ARRAY
, NULL
);
515 curr_types
[ntypes
++] = *dt
;
518 /* will be handled in next loop,
519 * just a ref to another type
521 curr_types
[ntypes
++] = NULL
;
525 *dt
= DEBUG_NewDataType(DT_BASIC
, typename
);
526 curr_types
[ntypes
++] = *dt
;
529 stab_strcpy(element_name
, sizeof(element_name
), c
+ 3);
530 *dt
= DEBUG_NewDataType(DT_STRUCT
, element_name
);
531 curr_types
[ntypes
++] = *dt
;
534 *dt
= DEBUG_NewDataType(DT_ENUM
, NULL
);
535 curr_types
[ntypes
++] = *dt
;
538 *dt
= DEBUG_NewDataType(DT_FUNC
, NULL
);
539 curr_types
[ntypes
++] = *dt
;
542 DEBUG_Printf(DBG_CHN_FIXME
, "Unknown type (%c).\n",c
[1]);
551 * OK, now take a second sweep through. Now we will be digging
552 * out the definitions of the various components, and storing
553 * them in the skeletons that we have already allocated. We take
554 * a right-to left search as this is much easier to parse.
556 for( c
= strrchr(ptr
, '='); c
!= NULL
; c
= strrchr(ptr
, '=') )
558 struct datatype
** dt
= DEBUG_ReadTypeEnumBackwards(c
-1);
559 struct datatype
** dt2
;
580 datatype
= *DEBUG_ReadTypeEnum(&tc
);
581 DEBUG_SetPointerType(curr_type
, datatype
);
589 dt2
= DEBUG_ReadTypeEnum(&tc
);
595 else if (!*dt
&& !*dt2
)
597 /* this should be a basic type, define it */
598 *dt2
= *dt
= DEBUG_NewDataType(DT_BASIC
, typename
);
602 DEBUG_Printf(DBG_CHN_MESG
, "Unknown condition %p %p (%s)\n", *dt
, *dt2
, ptr
);
608 curr_types
[ntp
--] = *dt
;
614 * We have already handled these above.
620 /* ar<typeinfo_nodef>;<int>;<int>;<typeinfo>,<int>,<int>;; */
624 DEBUG_ReadTypeEnum(&tc
);
626 arrmin
= strtol(tc
, &tc
, 10); /* <int> */
628 arrmax
= strtol(tc
, &tc
, 10); /* <int> */
630 datatype
= *DEBUG_ReadTypeEnum(&tc
); /* <typeinfo> */
635 DEBUG_SetArrayParams(curr_type
, arrmin
, arrmax
, datatype
);
643 if( DEBUG_SetStructSize(curr_type
, strtol(tc
, &tc
, 10)) == FALSE
)
646 * We have already filled out this structure. Nothing to do,
647 * so just skip forward to the end of the definition.
649 while( tc
[0] != ';' && tc
[1] != ';' )
662 * Now parse the individual elements of the structure/union.
673 datatype
= *DEBUG_ReadTypeEnum(&tc
);
676 offset
= strtol(tc
, &tc
, 10);
678 size
= strtol(tc
, &tc
, 10);
681 DEBUG_AddStructElement(curr_type
, element_name
, datatype
,
686 /* ... but proceed parsing to the end of the stab */
687 DEBUG_Printf(DBG_CHN_MESG
, "failure on %s %s\n", ptr
, ti
);
694 /* if we had a undeclared value this one is undeclared too.
695 * remove it from the stab_types.
696 * I just set it to NULL to detect bugs in my thoughtprocess.
697 * FIXME: leaks the memory for the structure elements.
698 * FIXME: such structures should have been optimized away
712 * Now parse the individual elements of the structure/union.
721 offset
= strtol(tc
, &tc
, 10);
723 DEBUG_AddStructElement(curr_type
, element_name
, NULL
, offset
, 0);
731 DEBUG_Printf(DBG_CHN_FIXME
, "Unknown type (%c).\n",c
[1]);
736 * Now register the type so that if we encounter it again, we will know
739 DEBUG_RegisterTypedef(orig_typename
, curr_types
, ntypes
);
744 static struct datatype
*
745 DEBUG_ParseStabType(const char * stab
)
750 * Look through the stab definition, and figure out what datatype
751 * this represents. If we have something we know about, assign the
754 c
= strchr(stab
, ':');
760 * The next character says more about the type (i.e. data, function, etc)
761 * of symbol. Skip it.
766 * The next is either an integer or a (integer,integer).
767 * The DEBUG_ReadTypeEnum takes care that stab_types is large enough.
769 return *DEBUG_ReadTypeEnum(&c
);
773 DEBUG_ParseStabs(char * addr
, unsigned int load_offset
,
774 unsigned int staboff
, int stablen
,
775 unsigned int strtaboff
, int strtablen
)
777 struct name_hash
* curr_func
= NULL
;
778 struct wine_locals
* curr_loc
= NULL
;
779 struct name_hash
* curr_sym
= NULL
;
780 char currpath
[PATH_MAX
];
782 int in_external_file
= FALSE
;
790 struct stab_nlist
* stab_ptr
;
793 char * subpath
= NULL
;
796 nstab
= stablen
/ sizeof(struct stab_nlist
);
797 stab_ptr
= (struct stab_nlist
*) (addr
+ staboff
);
798 strs
= (char *) (addr
+ strtaboff
);
800 memset(currpath
, 0, sizeof(currpath
));
803 * Allocate a buffer into which we can build stab strings for cases
804 * where the stab is continued over multiple lines.
807 stabbuff
= (char *) DBG_alloc(stabbufflen
);
811 for(i
=0; i
< nstab
; i
++, stab_ptr
++ )
813 ptr
= strs
+ (unsigned int) stab_ptr
->n_un
.n_name
;
814 if( ptr
[strlen(ptr
) - 1] == '\\' )
817 * Indicates continuation. Append this to the buffer, and go onto the
818 * next record. Repeat the process until we find a stab without the
819 * '/' character, as this indicates we have the whole thing.
822 if( strlen(stabbuff
) + len
> stabbufflen
)
824 stabbufflen
+= 65536;
825 stabbuff
= (char *) DBG_realloc(stabbuff
, stabbufflen
);
827 strncat(stabbuff
, ptr
, len
- 1);
830 else if( stabbuff
[0] != '\0' )
832 strcat( stabbuff
, ptr
);
836 if( strchr(ptr
, '=') != NULL
)
839 * The stabs aren't in writable memory, so copy it over so we are
840 * sure we can scribble on it.
842 if( ptr
!= stabbuff
)
844 strcpy(stabbuff
, ptr
);
847 stab_strcpy(symname
, sizeof(symname
), ptr
);
848 if (!DEBUG_ParseTypedefStab(ptr
, symname
)) {
849 /* skip this definition */
855 switch(stab_ptr
->n_type
)
859 * These are useless with ELF. They have no value, and you have to
860 * read the normal symbol table to get the address. Thus we
861 * ignore them, and when we process the normal symbol table
862 * we should do the right thing.
864 * With a.out or mingw, they actually do make some amount of sense.
866 new_value
.addr
.seg
= 0;
867 new_value
.type
= DEBUG_ParseStabType(ptr
);
868 new_value
.addr
.off
= load_offset
+ stab_ptr
->n_value
;
869 new_value
.cookie
= DV_TARGET
;
871 stab_strcpy(symname
, sizeof(symname
), ptr
);
873 curr_sym
= DEBUG_AddSymbol( symname
, &new_value
, currpath
,
874 SYM_WINE
| SYM_DATA
| SYM_INVALID
);
876 curr_sym
= DEBUG_AddSymbol( symname
, &new_value
, currpath
,
877 SYM_WINE
| SYM_DATA
);
883 * We need to keep track of these so we get symbol scoping
884 * right for local variables. For now, we just ignore them.
885 * The hooks are already there for dealing with this however,
886 * so all we need to do is to keep count of the nesting level,
887 * and find the RBRAC for each matching LBRAC.
893 * These are static symbols and BSS symbols.
895 new_value
.addr
.seg
= 0;
896 new_value
.type
= DEBUG_ParseStabType(ptr
);
897 new_value
.addr
.off
= load_offset
+ stab_ptr
->n_value
;
898 new_value
.cookie
= DV_TARGET
;
900 stab_strcpy(symname
, sizeof(symname
), ptr
);
901 curr_sym
= DEBUG_AddSymbol( symname
, &new_value
, currpath
,
902 SYM_WINE
| SYM_DATA
);
906 * These are function parameters.
908 if( curr_func
!= NULL
&& !in_external_file
)
910 stab_strcpy(symname
, sizeof(symname
), ptr
);
911 curr_loc
= DEBUG_AddLocal( curr_func
, 0,
912 stab_ptr
->n_value
, 0, 0, symname
);
913 DEBUG_SetLocalSymbolType( curr_loc
, DEBUG_ParseStabType(ptr
) );
917 if( curr_func
!= NULL
&& !in_external_file
)
919 stab_strcpy(symname
, sizeof(symname
), ptr
);
920 curr_loc
= DEBUG_AddLocal( curr_func
, stab_ptr
->n_value
+ 1,
922 DEBUG_SetLocalSymbolType( curr_loc
, DEBUG_ParseStabType(ptr
) );
926 if( curr_func
!= NULL
&& !in_external_file
)
928 stab_strcpy(symname
, sizeof(symname
), ptr
);
929 curr_loc
= DEBUG_AddLocal( curr_func
, 0,
930 stab_ptr
->n_value
, 0, 0, symname
);
931 DEBUG_SetLocalSymbolType( curr_loc
, DEBUG_ParseStabType(ptr
) );
936 * This is a line number. These are always relative to the start
937 * of the function (N_FUN), and this makes the lookup easier.
939 if( curr_func
!= NULL
&& !in_external_file
)
942 DEBUG_AddLineNumber(curr_func
, stab_ptr
->n_desc
,
947 * This isn't right. The order of the stabs is different under
948 * a.out, and as a result we would end up attaching the line
949 * number to the wrong function.
951 DEBUG_AddLineNumber(curr_func
, stab_ptr
->n_desc
,
952 stab_ptr
->n_value
- curr_func
->addr
.off
);
959 * First, clean up the previous function we were working on.
961 DEBUG_Normalize(curr_func
);
964 * For now, just declare the various functions. Later
965 * on, we will add the line number information and the
968 if( !in_external_file
)
970 stab_strcpy(symname
, sizeof(symname
), ptr
);
973 new_value
.addr
.seg
= 0;
974 new_value
.type
= DEBUG_ParseStabType(ptr
);
975 new_value
.addr
.off
= load_offset
+ stab_ptr
->n_value
;
976 new_value
.cookie
= DV_TARGET
;
978 * Copy the string to a temp buffer so we
979 * can kill everything after the ':'. We do
980 * it this way because otherwise we end up dirtying
981 * all of the pages related to the stabs, and that
982 * sucks up swap space like crazy.
984 curr_func
= DEBUG_AddSymbol( symname
, &new_value
, currpath
,
985 SYM_WINE
| SYM_FUNC
);
989 /* some GCC seem to use a N_FUN "" to mark the end of a function */
996 * Don't add line number information for this function
1004 * This indicates a new source file. Append the records
1005 * together, to build the correct path name.
1009 * With a.out, there is no NULL string N_SO entry at the end of
1010 * the file. Thus when we find non-consecutive entries,
1011 * we consider that a new file is started.
1013 if( last_nso
< i
-1 )
1016 DEBUG_Normalize(curr_func
);
1027 DEBUG_Normalize(curr_func
);
1033 strcat(currpath
, ptr
);
1035 strcpy(currpath
, ptr
);
1037 DEBUG_ResetIncludes();
1043 * This indicates we are including stuff from an include file.
1044 * If this is the main source, enable the debug stuff, otherwise
1047 in_external_file
= !(subpath
== NULL
|| strcmp(ptr
, subpath
) == 0);
1051 strtabinc
= stab_ptr
->n_value
;
1052 DEBUG_Normalize(curr_func
);
1057 * Ignore this. We don't care what it points to.
1061 DEBUG_AddInclude(DEBUG_CreateInclude(ptr
, stab_ptr
->n_value
));
1066 DEBUG_AddInclude(DEBUG_FindInclude(ptr
, stab_ptr
->n_value
));
1070 * Always ignore these. GCC doesn't even generate them.
1074 DEBUG_Printf(DBG_CHN_MESG
, "Unkown stab type 0x%02x\n", stab_ptr
->n_type
);
1081 DEBUG_Printf(DBG_CHN_MESG
, "%d %x %s\n", stab_ptr
->n_type
,
1082 (unsigned int) stab_ptr
->n_value
,
1083 strs
+ (unsigned int) stab_ptr
->n_un
.n_name
);
1087 DEBUG_FreeRegisteredTypedefs();
1088 DEBUG_FreeIncludes();
1096 * Walk through the entire symbol table and add any symbols we find there.
1097 * This can be used in cases where we have stripped ELF shared libraries,
1098 * or it can be used in cases where we have data symbols for which the address
1099 * isn't encoded in the stabs.
1101 * This is all really quite easy, since we don't have to worry about line
1102 * numbers or local data variables.
1106 DEBUG_ProcessElfSymtab(char * addr
, unsigned int load_offset
,
1107 Elf32_Shdr
* symtab
, Elf32_Shdr
* strtab
)
1109 char * curfile
= NULL
;
1110 struct name_hash
* curr_sym
= NULL
;
1113 DBG_VALUE new_value
;
1120 symp
= (Elf32_Sym
*) (addr
+ symtab
->sh_offset
);
1121 nsym
= symtab
->sh_size
/ sizeof(*symp
);
1122 strp
= (char *) (addr
+ strtab
->sh_offset
);
1124 for(i
=0; i
< nsym
; i
++, symp
++)
1127 * Ignore certain types of entries which really aren't of that much
1130 if( ELF32_ST_TYPE(symp
->st_info
) == STT_SECTION
||
1131 symp
->st_shndx
== STN_UNDEF
)
1136 symname
= strp
+ symp
->st_name
;
1139 * Save the name of the current file, so we have a way of tracking
1140 * static functions/data.
1142 if( ELF32_ST_TYPE(symp
->st_info
) == STT_FILE
)
1149 * See if we already have something for this symbol.
1150 * If so, ignore this entry, because it would have come from the
1151 * stabs or from a previous symbol. If the value is different,
1152 * we will have to keep the darned thing, because there can be
1153 * multiple local symbols by the same name.
1155 if( (DEBUG_GetSymbolValue(symname
, -1, &new_value
, FALSE
) == TRUE
)
1156 && (new_value
.addr
.off
== (load_offset
+ symp
->st_value
)) )
1159 new_value
.addr
.seg
= 0;
1160 new_value
.type
= NULL
;
1161 new_value
.addr
.off
= load_offset
+ symp
->st_value
;
1162 new_value
.cookie
= DV_TARGET
;
1163 flags
= SYM_WINE
| (ELF32_ST_BIND(symp
->st_info
) == STT_FUNC
1164 ? SYM_FUNC
: SYM_DATA
);
1165 if( ELF32_ST_BIND(symp
->st_info
) == STB_GLOBAL
)
1166 curr_sym
= DEBUG_AddSymbol( symname
, &new_value
, NULL
, flags
);
1168 curr_sym
= DEBUG_AddSymbol( symname
, &new_value
, curfile
, flags
);
1171 * Record the size of the symbol. This can come in handy in
1172 * some cases. Not really used yet, however.
1174 if( symp
->st_size
!= 0 )
1175 DEBUG_SetSymbolSize(curr_sym
, symp
->st_size
);
1182 DEBUG_ProcessElfObject(const char * filename
, unsigned int load_offset
)
1185 char * addr
= (char*)0xffffffff;
1187 struct stat statbuf
;
1197 * Make sure we can stat and open this file.
1199 if( filename
== NULL
)
1202 if (stat(filename
, &statbuf
) == -1)
1204 char *s
,*t
,*fn
,*paths
;
1205 if (strchr(filename
,'/'))
1207 paths
= DBG_strdup(getenv("PATH"));
1212 fn
= (char*)DBG_alloc(strlen(filename
)+1+strlen(s
)+1);
1215 strcat(fn
,filename
);
1216 if ((rtn
= DEBUG_ProcessElfObject(fn
,load_offset
))) {
1222 if (t
) s
= t
+1; else break;
1224 if (!s
|| !*s
) DEBUG_Printf(DBG_CHN_MESG
," not found");
1229 if (DEBUG_FindModuleByName(filename
, DM_TYPE_ELF
))
1232 DEBUG_Printf(DBG_CHN_MESG
, "Loading stabs debug symbols from %s (0x%08lx)\n",
1233 filename
, load_offset
);
1236 * Now open the file, so that we can mmap() it.
1238 if ((fd
= open(filename
, O_RDONLY
)) == -1)
1242 * Now mmap() the file.
1244 addr
= mmap(0, statbuf
.st_size
, PROT_READ
, MAP_PRIVATE
, fd
, 0);
1245 if (addr
== (char*)0xffffffff)
1249 * Next, we need to find a few of the internal ELF headers within
1250 * this thing. We need the main executable header, and the section
1253 ehptr
= (Elf32_Ehdr
*) addr
;
1255 if( load_offset
== 0 )
1256 DEBUG_RegisterELFModule(ehptr
->e_entry
, filename
);
1258 DEBUG_RegisterELFModule(load_offset
, filename
);
1260 spnt
= (Elf32_Shdr
*) (addr
+ ehptr
->e_shoff
);
1261 nsect
= ehptr
->e_shnum
;
1262 shstrtab
= (addr
+ spnt
[ehptr
->e_shstrndx
].sh_offset
);
1264 stabsect
= stabstrsect
= -1;
1266 for(i
=0; i
< nsect
; i
++)
1268 if( strcmp(shstrtab
+ spnt
[i
].sh_name
, ".stab") == 0 )
1271 if( strcmp(shstrtab
+ spnt
[i
].sh_name
, ".stabstr") == 0 )
1275 if( stabsect
== -1 || stabstrsect
== -1 ) {
1276 DEBUG_Printf(DBG_CHN_WARN
, "no .stab section\n");
1281 * OK, now just parse all of the stabs.
1283 if (!(rtn
= DEBUG_ParseStabs(addr
, load_offset
,
1284 spnt
[stabsect
].sh_offset
,
1285 spnt
[stabsect
].sh_size
,
1286 spnt
[stabstrsect
].sh_offset
,
1287 spnt
[stabstrsect
].sh_size
))) {
1288 DEBUG_Printf(DBG_CHN_WARN
, "bad stabs\n");
1292 for(i
=0; i
< nsect
; i
++)
1294 if( (strcmp(shstrtab
+ spnt
[i
].sh_name
, ".symtab") == 0)
1295 && (spnt
[i
].sh_type
== SHT_SYMTAB
) )
1296 DEBUG_ProcessElfSymtab(addr
, load_offset
,
1297 spnt
+ i
, spnt
+ spnt
[i
].sh_link
);
1299 if( (strcmp(shstrtab
+ spnt
[i
].sh_name
, ".dynsym") == 0)
1300 && (spnt
[i
].sh_type
== SHT_DYNSYM
) )
1301 DEBUG_ProcessElfSymtab(addr
, load_offset
,
1302 spnt
+ i
, spnt
+ spnt
[i
].sh_link
);
1307 if (addr
!= (char*)0xffffffff)
1308 munmap(addr
, statbuf
.st_size
);
1310 if (fd
!= -1) close(fd
);
1315 static BOOL
DEBUG_WalkList(struct r_debug
* dbg_hdr
)
1323 * Now walk the linked list. In all known ELF implementations,
1324 * the dynamic loader maintains this linked list for us. In some
1325 * cases the first entry doesn't appear with a name, in other cases it
1328 for (lm_addr
= (u_long
)dbg_hdr
->r_map
; lm_addr
; lm_addr
= (u_long
)lm
.l_next
) {
1329 if (!DEBUG_READ_MEM_VERBOSE((void*)lm_addr
, &lm
, sizeof(lm
)))
1331 if (lm
.l_addr
!= 0 &&
1332 DEBUG_READ_MEM_VERBOSE((void*)lm
.l_addr
, &ehdr
, sizeof(ehdr
)) &&
1333 ehdr
.e_type
== ET_DYN
&& /* only look at dynamic modules */
1334 lm
.l_name
!= NULL
&&
1335 DEBUG_READ_MEM_VERBOSE(lm
.l_name
, bufstr
, sizeof(bufstr
))) {
1336 bufstr
[sizeof(bufstr
) - 1] = '\0';
1337 DEBUG_ProcessElfObject(bufstr
, lm
.l_addr
);
1344 static BOOL
DEBUG_RescanElf(void)
1346 struct r_debug dbg_hdr
;
1348 if (!DEBUG_CurrProcess
||
1349 !DEBUG_READ_MEM_VERBOSE((void*)DEBUG_CurrProcess
->dbg_hdr_addr
, &dbg_hdr
, sizeof(dbg_hdr
)))
1352 switch (dbg_hdr
.r_state
) {
1354 DEBUG_WalkList(&dbg_hdr
);
1359 /*FIXME: this is not currently handled, would need some kind of mark&sweep algo */
1366 DEBUG_ReadExecutableDbgInfo(const char* exe_name
)
1369 struct r_debug dbg_hdr
;
1374 * Make sure we can stat and open this file.
1376 if (exe_name
== NULL
) goto leave
;
1377 DEBUG_ProcessElfObject(exe_name
, 0);
1379 /* previous step should have loaded symbol _DYNAMIC if it exists inside
1380 * the main executable
1382 if (!DEBUG_GetSymbolValue("_DYNAMIC", -1, &val
, FALSE
)) {
1383 DEBUG_Printf(DBG_CHN_WARN
, "Can't find symbol _DYNAMIC\n");
1388 if (!DEBUG_READ_MEM_VERBOSE((void*)val
.addr
.off
, &dyn
, sizeof(dyn
)))
1390 val
.addr
.off
+= sizeof(dyn
);
1391 } while (dyn
.d_tag
!= DT_DEBUG
&& dyn
.d_tag
!= DT_NULL
);
1392 if (dyn
.d_tag
== DT_NULL
) goto leave
;
1395 * OK, now dig into the actual tables themselves.
1397 if (!DEBUG_READ_MEM_VERBOSE((void*)dyn
.d_un
.d_ptr
, &dbg_hdr
, sizeof(dbg_hdr
)))
1400 assert(!DEBUG_CurrProcess
->dbg_hdr_addr
);
1401 DEBUG_CurrProcess
->dbg_hdr_addr
= (u_long
)dyn
.d_un
.d_ptr
;
1403 if (dbg_hdr
.r_brk
) {
1406 DEBUG_Printf(DBG_CHN_TRACE
, "Setting up a breakpoint on r_brk(%lx)\n",
1409 DEBUG_SetBreakpoints(FALSE
);
1411 value
.cookie
= DV_TARGET
;
1413 value
.addr
.off
= dbg_hdr
.r_brk
;
1414 DEBUG_AddBreakpoint(&value
, DEBUG_RescanElf
);
1415 DEBUG_SetBreakpoints(TRUE
);
1418 rtn
= DEBUG_WalkList(&dbg_hdr
);
1424 #else /* !__ELF__ */
1427 DEBUG_ProcessElfObject(const char * filename
, unsigned int load_offset
)
1433 DEBUG_ReadExecutableDbgInfo(const char* exe_name
)
1438 #endif /* __ELF__ */