2 * File stabs.c - read stabs information from the wine executable itself.
4 * Copyright (C) 1996, Eric Youngdale.
19 #define PATH_MAX _MAX_PATH
24 #if defined(__svr4__) || defined(__sun)
34 #elif defined(__EMX__)
64 * This is how we translate stab types into our internal representations
67 static struct datatype
** stab_types
= NULL
;
68 static int num_stab_types
= 0;
71 * Set so that we know the main executable name and path.
78 struct stab_nlist
*n_next
;
84 unsigned long n_value
;
88 * This is used to keep track of known datatypes so that we don't redefine
89 * them over and over again. It sucks up lots of memory otherwise.
93 struct known_typedef
* next
;
96 struct datatype
* types
[0];
99 #define NR_STAB_HASH 521
101 struct known_typedef
* ktd_head
[NR_STAB_HASH
] = {NULL
,};
103 static unsigned int stab_hash( const char * name
)
105 unsigned int hash
= 0;
113 hash
= (hash
<< 4) + *p
++;
115 if( (tmp
= (hash
& 0xf0000000)) )
121 return hash
% NR_STAB_HASH
;
125 static void stab_strcpy(char * dest
, const char * source
)
128 * A strcpy routine that stops when we hit the ':' character.
129 * Faster than copying the whole thing, and then nuking the
132 while(*source
!= '\0' && *source
!= ':')
137 #define MAX_TD_NESTING 128
139 static int **typenums
;
140 static int *nroftypenums
=NULL
;
141 static int nrofnroftypenums
=0;
142 static int curtypenum
= 0;
146 DEBUG_FileSubNr2StabEnum(int filenr
,int subnr
) {
147 if (nrofnroftypenums
<=filenr
) {
148 nroftypenums
= DBG_realloc(nroftypenums
,sizeof(nroftypenums
[0])*(filenr
+1));
149 memset(nroftypenums
+nrofnroftypenums
,0,(filenr
+1-nrofnroftypenums
)*sizeof(nroftypenums
[0]));
150 typenums
= DBG_realloc(typenums
,sizeof(typenums
[0])*(filenr
+1));
151 memset(typenums
+nrofnroftypenums
,0,sizeof(typenums
[0])*(filenr
+1-nrofnroftypenums
));
152 nrofnroftypenums
=filenr
+1;
154 if (nroftypenums
[filenr
]<=subnr
) {
155 typenums
[filenr
] = DBG_realloc(typenums
[filenr
],sizeof(typenums
[0][0])*(subnr
+1));
156 memset(typenums
[filenr
]+nroftypenums
[filenr
],0,sizeof(typenums
[0][0])*(subnr
+1-nroftypenums
[filenr
]));
157 nroftypenums
[filenr
] = subnr
+1;
159 if (!typenums
[filenr
][subnr
])
160 typenums
[filenr
][subnr
]=++curtypenum
;
162 if( num_stab_types
<= curtypenum
) {
163 num_stab_types
= curtypenum
+ 256;
164 stab_types
= (struct datatype
**) DBG_realloc(stab_types
,
165 num_stab_types
* sizeof(struct datatype
*)
167 memset( stab_types
+ curtypenum
, 0, sizeof(struct datatype
*) * (num_stab_types
- curtypenum
) );
169 /*fprintf(stderr,"(%d,%d) is %d\n",filenr,subnr,typenums[filenr][subnr]); */
170 return typenums
[filenr
][subnr
];
175 DEBUG_ReadTypeEnumBackwards(char*x
) {
182 filenr
=strtol(x
,&x
,10); /* <int> */
184 subnr
=strtol(x
,&x
,10); /* <int> */
187 while ((*x
>='0') && (*x
<='9'))
192 return DEBUG_FileSubNr2StabEnum(filenr
,subnr
);
197 DEBUG_ReadTypeEnum(char **x
) {
202 filenr
=strtol(*x
,x
,10); /* <int> */
204 subnr
=strtol(*x
,x
,10); /* <int> */
208 subnr
= strtol(*x
,x
,10); /* <int> */
210 return DEBUG_FileSubNr2StabEnum(filenr
,subnr
);
215 DEBUG_RegisterTypedef(const char * name
, struct datatype
** types
, int ndef
)
218 struct known_typedef
* ktd
;
223 ktd
= (struct known_typedef
*) DBG_alloc(sizeof(struct known_typedef
)
224 + ndef
* sizeof(struct datatype
*));
226 hash
= stab_hash(name
);
228 ktd
->name
= DBG_strdup(name
);
230 memcpy(&ktd
->types
[0], types
, ndef
* sizeof(struct datatype
*));
231 ktd
->next
= ktd_head
[hash
];
232 ktd_head
[hash
] = ktd
;
239 DEBUG_HandlePreviousTypedef(const char * name
, const char * stab
)
242 enum debug_type expect
;
244 struct known_typedef
* ktd
;
247 hash
= stab_hash(name
);
249 for(ktd
= ktd_head
[hash
]; ktd
; ktd
= ktd
->next
)
250 if ((ktd
->name
[0] == name
[0]) && (strcmp(name
, ktd
->name
) == 0) )
254 * Didn't find it. This must be a new one.
260 * Examine the stab to make sure it has the same number of definitions.
263 for(ptr
= strchr(stab
, '='); ptr
; ptr
= strchr(ptr
+1, '='))
265 if( count
>= ktd
->ndefs
)
269 * Make sure the types of all of the objects is consistent with
270 * what we have already parsed.
299 fprintf(stderr
, "Unknown type (%c).\n",ptr
[1]);
302 if( expect
!= DEBUG_GetType(ktd
->types
[count
]) )
307 if( ktd
->ndefs
!= count
)
311 * Go through, dig out all of the type numbers, and substitute the
312 * appropriate things.
315 for(ptr
= strchr(stab
, '='); ptr
; ptr
= strchr(ptr
+1, '='))
316 stab_types
[DEBUG_ReadTypeEnumBackwards(ptr
-1)] = ktd
->types
[count
++];
321 static int DEBUG_FreeRegisteredTypedefs()
325 struct known_typedef
* ktd
;
326 struct known_typedef
* next
;
329 for(j
=0; j
< NR_STAB_HASH
; j
++ )
331 for(ktd
= ktd_head
[j
]; ktd
; ktd
= next
)
347 DEBUG_ParseTypedefStab(char * ptr
, const char * typename
)
352 struct datatype
* curr_type
;
353 struct datatype
* datatype
;
354 struct datatype
* curr_types
[MAX_TD_NESTING
];
355 char element_name
[1024];
358 const char * orig_typename
;
364 orig_typename
= typename
;
366 if( DEBUG_HandlePreviousTypedef(typename
, ptr
) )
370 * Go from back to front. First we go through and figure out what
371 * type numbers we need, and register those types. Then we go in
372 * and fill the details.
375 for( c
= strchr(ptr
, '='); c
!= NULL
; c
= strchr(c
+ 1, '=') )
378 * Back up until we get to a non-numeric character. This is the type
381 typenum
= DEBUG_ReadTypeEnumBackwards(c
-1);
383 if( ntypes
>= MAX_TD_NESTING
)
386 * If this ever happens, just bump the counter.
388 fprintf(stderr
, "Typedef nesting overflow\n");
395 stab_types
[typenum
] = DEBUG_NewDataType(DT_POINTER
, NULL
);
396 curr_types
[ntypes
++] = stab_types
[typenum
];
400 stab_types
[typenum
] = DEBUG_NewDataType(DT_STRUCT
, typename
);
401 curr_types
[ntypes
++] = stab_types
[typenum
];
404 stab_types
[typenum
] = DEBUG_NewDataType(DT_ARRAY
, NULL
);
405 curr_types
[ntypes
++] = stab_types
[typenum
];
410 stab_types
[typenum
] = DEBUG_NewDataType(DT_BASIC
, typename
);
411 curr_types
[ntypes
++] = stab_types
[typenum
];
414 stab_strcpy(element_name
, c
+ 3);
415 stab_types
[typenum
] = DEBUG_NewDataType(DT_STRUCT
, element_name
);
416 curr_types
[ntypes
++] = stab_types
[typenum
];
419 stab_types
[typenum
] = DEBUG_NewDataType(DT_ENUM
, NULL
);
420 curr_types
[ntypes
++] = stab_types
[typenum
];
423 stab_types
[typenum
] = DEBUG_NewDataType(DT_FUNC
, NULL
);
424 curr_types
[ntypes
++] = stab_types
[typenum
];
427 fprintf(stderr
, "Unknown type (%c).\n",c
[1]);
433 * Now register the type so that if we encounter it again, we will know
436 DEBUG_RegisterTypedef(orig_typename
, curr_types
, ntypes
);
439 * OK, now take a second sweep through. Now we will be digging
440 * out the definitions of the various components, and storing
441 * them in the skeletons that we have already allocated. We take
442 * a right-to left search as this is much easier to parse.
444 for( c
= strrchr(ptr
, '='); c
!= NULL
; c
= strrchr(ptr
, '=') )
446 int typenum
= DEBUG_ReadTypeEnumBackwards(c
-1);
447 curr_type
= stab_types
[typenum
];
464 datatype
= stab_types
[DEBUG_ReadTypeEnum(&tc
)];
465 DEBUG_SetPointerType(curr_type
, datatype
);
475 * We have already handled these above.
480 /* ar<typeinfo_nodef>;<int>;<int>;<typeinfo>,<int>,<int>;; */
484 DEBUG_ReadTypeEnum(&tc
);
486 arrmin
= strtol(tc
, &tc
, 10); /* <int> */
488 arrmax
= strtol(tc
, &tc
, 10); /* <int> */
490 datatype
= stab_types
[DEBUG_ReadTypeEnum(&tc
)]; /* <typeinfo> */
495 DEBUG_SetArrayParams(curr_type
, arrmin
, arrmax
, datatype
);
502 if( DEBUG_SetStructSize(curr_type
, strtol(tc
, &tc
, 10)) == FALSE
)
505 * We have already filled out this structure. Nothing to do,
506 * so just skip forward to the end of the definition.
508 while( tc
[0] != ';' && tc
[1] != ';' )
521 * Now parse the individual elements of the structure/union.
532 datatype
= stab_types
[DEBUG_ReadTypeEnum(&tc
)];
535 offset
= strtol(tc
, &tc
, 10);
537 size
= strtol(tc
, &tc
, 10);
540 DEBUG_AddStructElement(curr_type
, element_name
, datatype
, offset
, size
);
543 /* ... but proceed parsing to the end of the stab */
548 /* if we had a undeclared value this one is undeclared too.
549 * remove it from the stab_types.
550 * I just set it to NULL to detect bugs in my thoughtprocess.
551 * FIXME: leaks the memory for the structure elements.
552 * FIXME: such structures should have been optimized away
555 stab_types
[typenum
] = NULL
;
566 * Now parse the individual elements of the structure/union.
575 offset
= strtol(tc
, &tc
, 10);
577 DEBUG_AddStructElement(curr_type
, element_name
, NULL
, offset
, 0);
585 fprintf(stderr
, "Unknown type (%c).\n",c
[1]);
594 static struct datatype
*
595 DEBUG_ParseStabType(const char * stab
)
600 * Look through the stab definition, and figure out what datatype
601 * this represents. If we have something we know about, assign the
604 c
= strchr(stab
, ':');
610 * The next character says more about the type (i.e. data, function, etc)
611 * of symbol. Skip it.
615 * The next is either an integer or a (integer,integer).
616 * The DEBUG_ReadTypeEnum takes care that stab_types is large enough.
618 return stab_types
[DEBUG_ReadTypeEnum(&c
)];
622 DEBUG_ParseStabs(char * addr
, unsigned int load_offset
,
623 unsigned int staboff
, int stablen
,
624 unsigned int strtaboff
, int strtablen
)
626 struct name_hash
* curr_func
= NULL
;
627 struct wine_locals
* curr_loc
= NULL
;
628 struct name_hash
* curr_sym
= NULL
;
629 char currpath
[PATH_MAX
];
639 struct stab_nlist
* stab_ptr
;
642 char * subpath
= NULL
;
645 nstab
= stablen
/ sizeof(struct stab_nlist
);
646 stab_ptr
= (struct stab_nlist
*) (addr
+ staboff
);
647 strs
= (char *) (addr
+ strtaboff
);
649 memset(currpath
, 0, sizeof(currpath
));
652 * Allocate a buffer into which we can build stab strings for cases
653 * where the stab is continued over multiple lines.
656 stabbuff
= (char *) DBG_alloc(stabbufflen
);
660 for(i
=0; i
< nstab
; i
++, stab_ptr
++ )
662 ptr
= strs
+ (unsigned int) stab_ptr
->n_un
.n_name
;
663 if( ptr
[strlen(ptr
) - 1] == '\\' )
666 * Indicates continuation. Append this to the buffer, and go onto the
667 * next record. Repeat the process until we find a stab without the
668 * '/' character, as this indicates we have the whole thing.
671 if( strlen(stabbuff
) + len
> stabbufflen
)
673 stabbufflen
+= 65536;
674 stabbuff
= (char *) DBG_realloc(stabbuff
, stabbufflen
);
676 strncat(stabbuff
, ptr
, len
- 1);
679 else if( stabbuff
[0] != '\0' )
681 strcat( stabbuff
, ptr
);
685 if( strchr(ptr
, '=') != NULL
)
688 * The stabs aren't in writable memory, so copy it over so we are
689 * sure we can scribble on it.
691 if( ptr
!= stabbuff
)
693 strcpy(stabbuff
, ptr
);
696 stab_strcpy(symname
, ptr
);
697 DEBUG_ParseTypedefStab(ptr
, symname
);
700 switch(stab_ptr
->n_type
)
704 * These are useless with ELF. They have no value, and you have to
705 * read the normal symbol table to get the address. Thus we
706 * ignore them, and when we process the normal symbol table
707 * we should do the right thing.
709 * With a.out, they actually do make some amount of sense.
712 new_addr
.type
= DEBUG_ParseStabType(ptr
);
713 new_addr
.off
= load_offset
+ stab_ptr
->n_value
;
715 stab_strcpy(symname
, ptr
);
717 curr_sym
= DEBUG_AddSymbol( symname
, &new_addr
, currpath
,
718 SYM_WINE
| SYM_DATA
| SYM_INVALID
);
720 curr_sym
= DEBUG_AddSymbol( symname
, &new_addr
, currpath
,
721 SYM_WINE
| SYM_DATA
);
727 * We need to keep track of these so we get symbol scoping
728 * right for local variables. For now, we just ignore them.
729 * The hooks are already there for dealing with this however,
730 * so all we need to do is to keep count of the nesting level,
731 * and find the RBRAC for each matching LBRAC.
737 * These are static symbols and BSS symbols.
740 new_addr
.type
= DEBUG_ParseStabType(ptr
);
741 new_addr
.off
= load_offset
+ stab_ptr
->n_value
;
743 stab_strcpy(symname
, ptr
);
744 curr_sym
= DEBUG_AddSymbol( symname
, &new_addr
, currpath
,
745 SYM_WINE
| SYM_DATA
);
749 * These are function parameters.
751 if( (curr_func
!= NULL
)
752 && (stab_ptr
->n_value
!= 0) )
754 stab_strcpy(symname
, ptr
);
755 curr_loc
= DEBUG_AddLocal(curr_func
, 0,
756 stab_ptr
->n_value
, 0, 0, symname
);
757 DEBUG_SetLocalSymbolType( curr_loc
, DEBUG_ParseStabType(ptr
));
761 if( curr_func
!= NULL
)
763 stab_strcpy(symname
, ptr
);
764 curr_loc
= DEBUG_AddLocal(curr_func
, stab_ptr
->n_value
, 0, 0, 0, symname
);
765 DEBUG_SetLocalSymbolType( curr_loc
, DEBUG_ParseStabType(ptr
));
769 if( (curr_func
!= NULL
)
770 && (stab_ptr
->n_value
!= 0) )
772 stab_strcpy(symname
, ptr
);
773 DEBUG_AddLocal(curr_func
, 0,
774 stab_ptr
->n_value
, 0, 0, symname
);
776 else if (curr_func
== NULL
)
778 stab_strcpy(symname
, ptr
);
783 * This is a line number. These are always relative to the start
784 * of the function (N_FUN), and this makes the lookup easier.
786 if( curr_func
!= NULL
)
789 DEBUG_AddLineNumber(curr_func
, stab_ptr
->n_desc
,
794 * This isn't right. The order of the stabs is different under
795 * a.out, and as a result we would end up attaching the line
796 * number to the wrong function.
798 DEBUG_AddLineNumber(curr_func
, stab_ptr
->n_desc
,
799 stab_ptr
->n_value
- curr_func
->addr
.off
);
806 * First, clean up the previous function we were working on.
808 DEBUG_Normalize(curr_func
);
811 * For now, just declare the various functions. Later
812 * on, we will add the line number information and the
818 new_addr
.type
= DEBUG_ParseStabType(ptr
);
819 new_addr
.off
= load_offset
+ stab_ptr
->n_value
;
821 * Copy the string to a temp buffer so we
822 * can kill everything after the ':'. We do
823 * it this way because otherwise we end up dirtying
824 * all of the pages related to the stabs, and that
825 * sucks up swap space like crazy.
827 stab_strcpy(symname
, ptr
);
828 curr_func
= DEBUG_AddSymbol( symname
, &new_addr
, currpath
,
829 SYM_WINE
| SYM_FUNC
);
834 * Don't add line number information for this function
842 * This indicates a new source file. Append the records
843 * together, to build the correct path name.
847 * With a.out, there is no NULL string N_SO entry at the end of
848 * the file. Thus when we find non-consecutive entries,
849 * we consider that a new file is started.
854 DEBUG_Normalize(curr_func
);
865 DEBUG_Normalize(curr_func
);
868 * The datatypes that we would need to use are reset when
869 * we start a new file.
871 memset(stab_types
, 0, num_stab_types
* sizeof(stab_types
[0]));
873 for (i=0;i<nrofnroftypenums;i++)
874 memset(typenums[i],0,sizeof(typenums[i][0])*nroftypenums[i]);
880 strcat(currpath
, ptr
);
882 strcpy(currpath
, ptr
);
889 * This indicates we are including stuff from an include file.
890 * If this is the main source, enable the debug stuff, otherwise
893 if( subpath
== NULL
|| strcmp(ptr
, subpath
) == 0 )
900 DEBUG_Normalize(curr_func
);
906 strtabinc
= stab_ptr
->n_value
;
907 DEBUG_Normalize(curr_func
);
912 * Ignore this. We don't care what it points to.
919 * Always ignore these. GCC doesn't even generate them.
929 fprintf(stderr
, "%d %x %s\n", stab_ptr
->n_type
,
930 (unsigned int) stab_ptr
->n_value
,
931 strs
+ (unsigned int) stab_ptr
->n_un
.n_name
);
935 if( stab_types
!= NULL
)
937 DBG_free(stab_types
);
943 DEBUG_FreeRegisteredTypedefs();
951 * Walk through the entire symbol table and add any symbols we find there.
952 * This can be used in cases where we have stripped ELF shared libraries,
953 * or it can be used in cases where we have data symbols for which the address
954 * isn't encoded in the stabs.
956 * This is all really quite easy, since we don't have to worry about line
957 * numbers or local data variables.
961 DEBUG_ProcessElfSymtab(char * addr
, unsigned int load_offset
,
962 Elf32_Shdr
* symtab
, Elf32_Shdr
* strtab
)
964 char * curfile
= NULL
;
965 struct name_hash
* curr_sym
= NULL
;
975 symp
= (Elf32_Sym
*) (addr
+ symtab
->sh_offset
);
976 nsym
= symtab
->sh_size
/ sizeof(*symp
);
977 strp
= (char *) (addr
+ strtab
->sh_offset
);
979 for(i
=0; i
< nsym
; i
++, symp
++)
982 * Ignore certain types of entries which really aren't of that much
985 if( ELF32_ST_TYPE(symp
->st_info
) == STT_SECTION
)
990 symname
= strp
+ symp
->st_name
;
993 * Save the name of the current file, so we have a way of tracking
994 * static functions/data.
996 if( ELF32_ST_TYPE(symp
->st_info
) == STT_FILE
)
1004 * See if we already have something for this symbol.
1005 * If so, ignore this entry, because it would have come from the
1006 * stabs or from a previous symbol. If the value is different,
1007 * we will have to keep the darned thing, because there can be
1008 * multiple local symbols by the same name.
1010 if( (DEBUG_GetSymbolValue(symname
, -1, &new_addr
, FALSE
) == TRUE
)
1011 && (new_addr
.off
== (load_offset
+ symp
->st_value
)) )
1015 new_addr
.type
= NULL
;
1016 new_addr
.off
= load_offset
+ symp
->st_value
;
1017 flags
= SYM_WINE
| (ELF32_ST_BIND(symp
->st_info
) == STT_FUNC
1018 ? SYM_FUNC
: SYM_DATA
);
1019 if( ELF32_ST_BIND(symp
->st_info
) == STB_GLOBAL
)
1020 curr_sym
= DEBUG_AddSymbol( symname
, &new_addr
, NULL
, flags
);
1022 curr_sym
= DEBUG_AddSymbol( symname
, &new_addr
, curfile
, flags
);
1025 * Record the size of the symbol. This can come in handy in
1026 * some cases. Not really used yet, however.
1028 if( symp
->st_size
!= 0 )
1029 DEBUG_SetSymbolSize(curr_sym
, symp
->st_size
);
1037 DEBUG_ProcessElfObject(char * filename
, unsigned int load_offset
)
1040 struct stat statbuf
;
1043 char * addr
= (char *) 0xffffffff;
1054 * Make sure we can stat and open this file.
1056 if( filename
== NULL
)
1059 status
= stat(filename
, &statbuf
);
1062 char *s
,*t
,*fn
,*paths
;
1063 if (strchr(filename
,'/'))
1065 paths
= DBG_strdup(getenv("PATH"));
1070 fn
= (char*)DBG_alloc(strlen(filename
)+1+strlen(s
)+1);
1073 strcat(fn
,filename
);
1074 if ((rtn
= DEBUG_ProcessElfObject(fn
,load_offset
))) {
1080 if (t
) s
= t
+1; else break;
1082 if (!s
|| !*s
) fprintf(stderr
," not found");
1088 * Now open the file, so that we can mmap() it.
1090 fd
= open(filename
, O_RDONLY
);
1096 * Now mmap() the file.
1098 addr
= mmap(0, statbuf
.st_size
, PROT_READ
,
1099 MAP_PRIVATE
, fd
, 0);
1100 if( addr
== (char *) 0xffffffff )
1104 * Next, we need to find a few of the internal ELF headers within
1105 * this thing. We need the main executable header, and the section
1108 ehptr
= (Elf32_Ehdr
*) addr
;
1110 if( load_offset
== 0 )
1111 DEBUG_RegisterELFDebugInfo(ehptr
->e_entry
, statbuf
.st_size
, filename
);
1113 DEBUG_RegisterELFDebugInfo(load_offset
, statbuf
.st_size
, filename
);
1115 spnt
= (Elf32_Shdr
*) (addr
+ ehptr
->e_shoff
);
1116 nsect
= ehptr
->e_shnum
;
1117 shstrtab
= (addr
+ spnt
[ehptr
->e_shstrndx
].sh_offset
);
1119 stabsect
= stabstrsect
= -1;
1121 for(i
=0; i
< nsect
; i
++)
1123 if( strcmp(shstrtab
+ spnt
[i
].sh_name
, ".stab") == 0 )
1126 if( strcmp(shstrtab
+ spnt
[i
].sh_name
, ".stabstr") == 0 )
1130 if( stabsect
== -1 || stabstrsect
== -1 )
1134 * OK, now just parse all of the stabs.
1136 rtn
= DEBUG_ParseStabs(addr
, load_offset
,
1137 spnt
[stabsect
].sh_offset
,
1138 spnt
[stabsect
].sh_size
,
1139 spnt
[stabstrsect
].sh_offset
,
1140 spnt
[stabstrsect
].sh_size
);
1145 for(i
=0; i
< nsect
; i
++)
1147 if( (strcmp(shstrtab
+ spnt
[i
].sh_name
, ".symtab") == 0)
1148 && (spnt
[i
].sh_type
== SHT_SYMTAB
) )
1149 DEBUG_ProcessElfSymtab(addr
, load_offset
,
1150 spnt
+ i
, spnt
+ spnt
[i
].sh_link
);
1152 if( (strcmp(shstrtab
+ spnt
[i
].sh_name
, ".dynsym") == 0)
1153 && (spnt
[i
].sh_type
== SHT_DYNSYM
) )
1154 DEBUG_ProcessElfSymtab(addr
, load_offset
,
1155 spnt
+ i
, spnt
+ spnt
[i
].sh_link
);
1160 if( addr
!= (char *) 0xffffffff )
1161 munmap(addr
, statbuf
.st_size
);
1171 DEBUG_ReadExecutableDbgInfo(void)
1176 struct r_debug
* dbg_hdr
;
1177 struct link_map
* lpnt
= NULL
;
1179 extern Elf32_Dyn _DYNAMIC
[] __attribute__ ((weak
));
1181 extern Elf32_Dyn _DYNAMIC
[];
1186 exe_name
= DEBUG_argv0
;
1189 * Make sure we can stat and open this file.
1191 if( exe_name
== NULL
)
1194 fprintf( stderr
, "Loading symbols: %s", exe_name
);
1195 rowcount
= 17 + strlen(exe_name
);
1196 DEBUG_ProcessElfObject(exe_name
, 0);
1199 * Finally walk the tables that the dynamic loader maintains to find all
1200 * of the other shared libraries which might be loaded. Perform the
1201 * same step for all of these.
1203 if( (&_DYNAMIC
== NULL
) || (_DYNAMIC
== NULL
) )
1209 * Now walk the dynamic section (of the executable, looking for a DT_DEBUG
1212 for(; dynpnt
->d_tag
!= DT_NULL
; dynpnt
++)
1213 if( dynpnt
->d_tag
== DT_DEBUG
)
1216 if( (dynpnt
->d_tag
!= DT_DEBUG
)
1217 || (dynpnt
->d_un
.d_ptr
== 0) )
1221 * OK, now dig into the actual tables themselves.
1223 dbg_hdr
= (struct r_debug
*) dynpnt
->d_un
.d_ptr
;
1224 lpnt
= dbg_hdr
->r_map
;
1227 * Now walk the linked list. In all known ELF implementations,
1228 * the dynamic loader maintains this linked list for us. In some
1229 * cases the first entry doesn't appear with a name, in other cases it
1232 for(; lpnt
; lpnt
= lpnt
->l_next
)
1235 * We already got the stuff for the executable using the
1236 * argv[0] entry above. Here we only need to concentrate on any
1237 * shared libraries which may be loaded.
1239 ehdr
= (Elf32_Ehdr
*) lpnt
->l_addr
;
1240 if( (lpnt
->l_addr
== 0) || (ehdr
->e_type
!= ET_DYN
) )
1243 if( lpnt
->l_name
!= NULL
)
1245 if (rowcount
+ strlen(lpnt
->l_name
) > 76)
1247 fprintf( stderr
, "\n " );
1250 fprintf( stderr
, " %s", lpnt
->l_name
);
1251 rowcount
+= strlen(lpnt
->l_name
) + 1;
1252 DEBUG_ProcessElfObject(lpnt
->l_name
, lpnt
->l_addr
);
1259 fprintf( stderr
, "\n" );
1264 #else /* !__ELF__ */
1271 DEBUG_ReadExecutableDbgInfo(void)
1273 char * addr
= (char *) 0xffffffff;
1278 unsigned int staboff
;
1279 struct stat statbuf
;
1281 unsigned int stroff
;
1283 exe_name
= DEBUG_argv0
;
1286 * Make sure we can stat and open this file.
1288 if( exe_name
== NULL
)
1291 status
= stat(exe_name
, &statbuf
);
1296 * Now open the file, so that we can mmap() it.
1298 fd
= open(exe_name
, O_RDONLY
);
1304 * Now mmap() the file.
1306 addr
= mmap(0, statbuf
.st_size
, PROT_READ
,
1307 MAP_PRIVATE
, fd
, 0);
1308 if( addr
== (char *) 0xffffffff )
1311 ahdr
= (struct exec
*) addr
;
1313 staboff
= N_SYMOFF(*ahdr
);
1314 stroff
= N_STROFF(*ahdr
);
1315 rtn
= DEBUG_ParseStabs(addr
, 0,
1319 statbuf
.st_size
- stroff
);
1322 * Give a nice status message here...
1324 fprintf( stderr
, "Loading symbols: %s", exe_name
);
1330 if( addr
!= (char *) 0xffffffff )
1331 munmap(addr
, statbuf
.st_size
);
1341 * Non-linux, non-ELF platforms.
1344 DEBUG_ReadExecutableDbgInfo(void)
1350 #endif /* __ELF__ */