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- Check for string pointer being outside of the string table. 

- Only parse typedefs on stabs entries that can have them.
This commit is contained in:
Robert Shearman 2004-10-04 19:31:05 +00:00 committed by Alexandre Julliard
parent be7c95a3e5
commit 20546c84bb
1 changed files with 32 additions and 15 deletions
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47
dlls/dbghelp/stabs.c
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@ -1094,6 +1094,7 @@ BOOL stabs_parse(struct module* module, const char* addr,
unsigned int stabbufflen;
const struct stab_nlist* stab_ptr;
const char* strs;
const char* strs_end;
int strtabinc;
char symname[4096];
unsigned incl[32];
@ -1107,6 +1108,7 @@ BOOL stabs_parse(struct module* module, const char* addr,
nstab = stablen / sizeof(struct stab_nlist);
stab_ptr = (const struct stab_nlist*)(addr + staboff);
strs = (const char*)(addr + strtaboff);
strs_end = strs + strtablen;
memset(srcpath, 0, sizeof(srcpath));
memset(stabs_basic, 0, sizeof(stabs_basic));
@ -1123,6 +1125,11 @@ BOOL stabs_parse(struct module* module, const char* addr,
for (i = 0; i < nstab; i++, stab_ptr++)
{
ptr = strs + stab_ptr->n_un.n_strx;
if ((ptr > strs_end) || (ptr + strlen(ptr) > strs_end))
{
WARN("Bad stabs string %p\n", ptr);
continue;
}
if (ptr[strlen(ptr) - 1] == '\\')
{
/*
@ -1145,23 +1152,33 @@ BOOL stabs_parse(struct module* module, const char* addr,
ptr = stabbuff;
}
if (strchr(ptr, '=') != NULL)
/* only symbol entries contain a typedef */
switch (stab_ptr->n_type)
{
/*
* The stabs aren't in writable memory, so copy it over so we are
* sure we can scribble on it.
*/
if (ptr != stabbuff)
case N_GSYM:
case N_LCSYM:
case N_STSYM:
case N_RSYM:
case N_LSYM:
case N_ROSYM:
if (strchr(ptr, '=') != NULL)
{
strcpy(stabbuff, ptr);
ptr = stabbuff;
}
stab_strcpy(symname, sizeof(symname), ptr);
if (!stabs_parse_typedef(module, ptr, symname))
{
/* skip this definition */
stabbuff[0] = '\0';
continue;
/*
* The stabs aren't in writable memory, so copy it over so we are
* sure we can scribble on it.
*/
if (ptr != stabbuff)
{
strcpy(stabbuff, ptr);
ptr = stabbuff;
}
stab_strcpy(symname, sizeof(symname), ptr);
if (!stabs_parse_typedef(module, ptr, symname))
{
/* skip this definition */
stabbuff[0] = '\0';
continue;
}
}
}