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dbghelp: For mingw32 (stabs debug info), parse the FileHeader's symbol table to offset properly the global variables.

This commit is contained in:
Eric Pouech 2009-12-09 20:55:27 +01:00 committed by Alexandre Julliard
parent 2271a8d417
commit 185e5daed6
1 changed files with 64 additions and 0 deletions
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64
dlls/dbghelp/pe_module.c
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@ -35,6 +35,69 @@
WINE_DEFAULT_DEBUG_CHANNEL(dbghelp);
/******************************************************************
* pe_load_symbol_table
*
* Use the COFF symbol table (if any) from the IMAGE_FILE_HEADER to set the absolute address
* of global symbols.
* Mingw32 requires this for stabs debug information as address for global variables isn't filled in
* (this is similar to what is done in elf_module.c when using the .symtab ELF section)
*/
static BOOL pe_load_symbol_table(struct module* module, IMAGE_NT_HEADERS* nth, void* mapping)
{
const IMAGE_SYMBOL* isym;
int i, numsym, naux;
const char* strtable;
char tmp[9];
const char* name;
struct hash_table_iter hti;
void* ptr;
struct symt_data* sym;
const IMAGE_SECTION_HEADER* sect;
numsym = nth->FileHeader.NumberOfSymbols;
if (!nth->FileHeader.PointerToSymbolTable || !numsym)
return TRUE;
isym = (const IMAGE_SYMBOL*)((char*)mapping + nth->FileHeader.PointerToSymbolTable);
/* FIXME: no way to get strtable size */
strtable = (const char*)&isym[numsym];
sect = IMAGE_FIRST_SECTION(nth);
for (i = 0; i < numsym; i+= naux, isym += naux)
{
if (isym->StorageClass == IMAGE_SYM_CLASS_EXTERNAL &&
isym->SectionNumber > 0 && isym->SectionNumber <= nth->FileHeader.NumberOfSections)
{
if (isym->N.Name.Short)
{
name = memcpy(tmp, isym->N.ShortName, 8);
tmp[8] = '\0';
}
else name = strtable + isym->N.Name.Long;
if (name[0] == '_') name++;
hash_table_iter_init(&module->ht_symbols, &hti, name);
while ((ptr = hash_table_iter_up(&hti)))
{
sym = GET_ENTRY(ptr, struct symt_data, hash_elt);
if (sym->symt.tag == SymTagData &&
(sym->kind == DataIsGlobal || sym->kind == DataIsFileStatic) &&
!strcmp(sym->hash_elt.name, name))
{
TRACE("Changing absolute address for %d.%s: %lx -> %s\n",
isym->SectionNumber, name, sym->u.var.offset,
wine_dbgstr_longlong(module->module.BaseOfImage +
sect[isym->SectionNumber - 1].VirtualAddress + isym->Value));
sym->u.var.offset = module->module.BaseOfImage +
sect[isym->SectionNumber - 1].VirtualAddress + isym->Value;
break;
}
}
}
naux = isym->NumberOfAuxSymbols + 1;
}
return TRUE;
}
/******************************************************************
* pe_load_stabs
*
@ -74,6 +137,7 @@ static BOOL pe_load_stabs(const struct process* pcs, struct module* module,
RtlImageRvaToVa(nth, mapping, stabstr, NULL),
stabstrsize,
NULL, NULL);
if (ret) pe_load_symbol_table(module, nth, mapping);
}
TRACE("%s the STABS debug info\n", ret ? "successfully loaded" : "failed to load");