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448 lines
16 KiB
C
448 lines
16 KiB
C
/*
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* Read VC++ debug information from COFF and eventually
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* from PDB files.
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*
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* Copyright (C) 1996, Eric Youngdale.
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* Copyright (C) 1999-2000, Ulrich Weigand.
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* Copyright (C) 2004, Eric Pouech.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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/*
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* Note - this handles reading debug information for 32 bit applications
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* that run under Windows-NT for example. I doubt that this would work well
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* for 16 bit applications, but I don't think it really matters since the
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* file format is different, and we should never get in here in such cases.
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*
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* TODO:
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* Get 16 bit CV stuff working.
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* Add symbol size to internal symbol table.
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*/
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#include "dbghelp_private.h"
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WINE_DEFAULT_DEBUG_CHANNEL(dbghelp_coff);
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/*========================================================================
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* Process COFF debug information.
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*/
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struct CoffFile
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{
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unsigned int startaddr;
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unsigned int endaddr;
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struct symt_compiland* compiland;
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int linetab_offset;
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int linecnt;
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struct symt** entries;
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int neps;
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int neps_alloc;
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};
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struct CoffFileSet
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{
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struct CoffFile* files;
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int nfiles;
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int nfiles_alloc;
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};
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static const char* coff_get_name(const IMAGE_SYMBOL* coff_sym,
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const char* coff_strtab)
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{
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static char namebuff[9];
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const char* nampnt;
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if (coff_sym->N.Name.Short)
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{
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memcpy(namebuff, coff_sym->N.ShortName, 8);
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namebuff[8] = '\0';
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nampnt = &namebuff[0];
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}
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else
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{
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nampnt = coff_strtab + coff_sym->N.Name.Long;
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}
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if (nampnt[0] == '_') nampnt++;
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return nampnt;
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}
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static int coff_add_file(struct CoffFileSet* coff_files, struct module* module,
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const char* filename)
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{
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struct CoffFile* file;
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if (coff_files->nfiles + 1 >= coff_files->nfiles_alloc)
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{
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if (coff_files->files)
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{
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coff_files->nfiles_alloc *= 2;
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coff_files->files = HeapReAlloc(GetProcessHeap(), 0, coff_files->files,
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coff_files->nfiles_alloc * sizeof(struct CoffFile));
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}
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else
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{
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coff_files->nfiles_alloc = 16;
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coff_files->files = HeapAlloc(GetProcessHeap(), 0,
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coff_files->nfiles_alloc * sizeof(struct CoffFile));
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}
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}
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file = coff_files->files + coff_files->nfiles;
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file->startaddr = 0xffffffff;
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file->endaddr = 0;
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file->compiland = symt_new_compiland(module, 0,
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source_new(module, NULL, filename));
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file->linetab_offset = -1;
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file->linecnt = 0;
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file->entries = NULL;
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file->neps = file->neps_alloc = 0;
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return coff_files->nfiles++;
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}
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static void coff_add_symbol(struct CoffFile* coff_file, struct symt* sym)
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{
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if (coff_file->neps + 1 >= coff_file->neps_alloc)
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{
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if (coff_file->entries)
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{
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coff_file->neps_alloc *= 2;
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coff_file->entries = HeapReAlloc(GetProcessHeap(), 0, coff_file->entries,
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coff_file->neps_alloc * sizeof(struct symt*));
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}
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else
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{
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coff_file->neps_alloc = 32;
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coff_file->entries = HeapAlloc(GetProcessHeap(), 0,
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coff_file->neps_alloc * sizeof(struct symt*));
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}
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}
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coff_file->entries[coff_file->neps++] = sym;
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}
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DECLSPEC_HIDDEN BOOL coff_process_info(const struct msc_debug_info* msc_dbg)
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{
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const IMAGE_AUX_SYMBOL* aux;
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const IMAGE_COFF_SYMBOLS_HEADER* coff;
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const IMAGE_LINENUMBER* coff_linetab;
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const IMAGE_LINENUMBER* linepnt;
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const char* coff_strtab;
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const IMAGE_SYMBOL* coff_sym;
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const IMAGE_SYMBOL* coff_symbols;
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struct CoffFileSet coff_files;
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int curr_file_idx = -1;
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unsigned int i;
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int j;
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int k;
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int l;
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int linetab_indx;
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const char* nampnt;
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int naux;
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BOOL ret = FALSE;
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ULONG64 addr;
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TRACE("Processing COFF symbols...\n");
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assert(sizeof(IMAGE_SYMBOL) == IMAGE_SIZEOF_SYMBOL);
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assert(sizeof(IMAGE_LINENUMBER) == IMAGE_SIZEOF_LINENUMBER);
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coff_files.files = NULL;
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coff_files.nfiles = coff_files.nfiles_alloc = 0;
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coff = (const IMAGE_COFF_SYMBOLS_HEADER*)msc_dbg->root;
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coff_symbols = (const IMAGE_SYMBOL*)((const char *)coff + coff->LvaToFirstSymbol);
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coff_linetab = (const IMAGE_LINENUMBER*)((const char *)coff + coff->LvaToFirstLinenumber);
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coff_strtab = (const char*)(coff_symbols + coff->NumberOfSymbols);
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linetab_indx = 0;
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for (i = 0; i < coff->NumberOfSymbols; i++)
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{
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coff_sym = coff_symbols + i;
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naux = coff_sym->NumberOfAuxSymbols;
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if (coff_sym->StorageClass == IMAGE_SYM_CLASS_FILE)
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{
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curr_file_idx = coff_add_file(&coff_files, msc_dbg->module,
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(const char*)(coff_sym + 1));
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TRACE("New file %s\n", (const char*)(coff_sym + 1));
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i += naux;
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continue;
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}
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if (curr_file_idx < 0)
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{
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assert(coff_files.nfiles == 0 && coff_files.nfiles_alloc == 0);
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curr_file_idx = coff_add_file(&coff_files, msc_dbg->module, "<none>");
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TRACE("New file <none>\n");
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}
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/*
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* This guy marks the size and location of the text section
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* for the current file. We need to keep track of this so
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* we can figure out what file the different global functions
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* go with.
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*/
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if (coff_sym->StorageClass == IMAGE_SYM_CLASS_STATIC &&
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naux != 0 && coff_sym->Type == 0 && coff_sym->SectionNumber == 1)
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{
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aux = (const IMAGE_AUX_SYMBOL*) (coff_sym + 1);
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if (coff_files.files[curr_file_idx].linetab_offset != -1)
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{
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/*
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* Save this so we can still get the old name.
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*/
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const char* fn;
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fn = source_get(msc_dbg->module,
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coff_files.files[curr_file_idx].compiland->source);
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TRACE("Duplicating sect from %s: %x %x %x %d %d\n",
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fn, aux->Section.Length,
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aux->Section.NumberOfRelocations,
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aux->Section.NumberOfLinenumbers,
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aux->Section.Number, aux->Section.Selection);
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TRACE("More sect %d %s %08x %d %d %d\n",
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coff_sym->SectionNumber,
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coff_get_name(coff_sym, coff_strtab),
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coff_sym->Value, coff_sym->Type,
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coff_sym->StorageClass, coff_sym->NumberOfAuxSymbols);
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/*
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* Duplicate the file entry. We have no way to describe
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* multiple text sections in our current way of handling things.
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*/
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coff_add_file(&coff_files, msc_dbg->module, fn);
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}
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else
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{
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TRACE("New text sect from %s: %x %x %x %d %d\n",
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source_get(msc_dbg->module, coff_files.files[curr_file_idx].compiland->source),
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aux->Section.Length,
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aux->Section.NumberOfRelocations,
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aux->Section.NumberOfLinenumbers,
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aux->Section.Number, aux->Section.Selection);
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}
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if (coff_files.files[curr_file_idx].startaddr > coff_sym->Value)
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{
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coff_files.files[curr_file_idx].startaddr = coff_sym->Value;
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}
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if (coff_files.files[curr_file_idx].endaddr < coff_sym->Value + aux->Section.Length)
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{
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coff_files.files[curr_file_idx].endaddr = coff_sym->Value + aux->Section.Length;
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}
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coff_files.files[curr_file_idx].linetab_offset = linetab_indx;
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coff_files.files[curr_file_idx].linecnt = aux->Section.NumberOfLinenumbers;
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linetab_indx += aux->Section.NumberOfLinenumbers;
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i += naux;
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continue;
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}
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if (coff_sym->StorageClass == IMAGE_SYM_CLASS_STATIC && naux == 0 &&
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coff_sym->SectionNumber == 1)
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{
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DWORD base = msc_dbg->sectp[coff_sym->SectionNumber - 1].VirtualAddress;
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/*
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* This is a normal static function when naux == 0.
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* Just register it. The current file is the correct
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* one in this instance.
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*/
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nampnt = coff_get_name(coff_sym, coff_strtab);
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TRACE("\tAdding static symbol %s\n", nampnt);
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/* FIXME: was adding symbol to this_file ??? */
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coff_add_symbol(&coff_files.files[curr_file_idx],
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&symt_new_function(msc_dbg->module,
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coff_files.files[curr_file_idx].compiland,
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nampnt,
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msc_dbg->module->module.BaseOfImage + base + coff_sym->Value,
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0 /* FIXME */,
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NULL /* FIXME */)->symt);
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continue;
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}
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if (coff_sym->StorageClass == IMAGE_SYM_CLASS_EXTERNAL &&
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ISFCN(coff_sym->Type) && coff_sym->SectionNumber > 0)
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{
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struct symt_compiland* compiland = NULL;
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DWORD base = msc_dbg->sectp[coff_sym->SectionNumber - 1].VirtualAddress;
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nampnt = coff_get_name(coff_sym, coff_strtab);
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TRACE("%d: %s %s\n",
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i, wine_dbgstr_longlong(msc_dbg->module->module.BaseOfImage + base + coff_sym->Value),
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nampnt);
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TRACE("\tAdding global symbol %s (sect=%s)\n",
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nampnt, msc_dbg->sectp[coff_sym->SectionNumber - 1].Name);
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/*
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* Now we need to figure out which file this guy belongs to.
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*/
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for (j = 0; j < coff_files.nfiles; j++)
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{
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if (coff_files.files[j].startaddr <= base + coff_sym->Value
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&& coff_files.files[j].endaddr > base + coff_sym->Value)
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{
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compiland = coff_files.files[j].compiland;
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break;
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}
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}
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if (j < coff_files.nfiles)
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{
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coff_add_symbol(&coff_files.files[j],
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&symt_new_function(msc_dbg->module, compiland, nampnt,
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msc_dbg->module->module.BaseOfImage + base + coff_sym->Value,
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0 /* FIXME */, NULL /* FIXME */)->symt);
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}
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else
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{
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symt_new_function(msc_dbg->module, NULL, nampnt,
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msc_dbg->module->module.BaseOfImage + base + coff_sym->Value,
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0 /* FIXME */, NULL /* FIXME */);
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}
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i += naux;
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continue;
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}
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if (coff_sym->StorageClass == IMAGE_SYM_CLASS_EXTERNAL &&
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coff_sym->SectionNumber > 0)
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{
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DWORD base = msc_dbg->sectp[coff_sym->SectionNumber - 1].VirtualAddress;
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struct location loc;
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/*
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* Similar to above, but for the case of data symbols.
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* These aren't treated as entrypoints.
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*/
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nampnt = coff_get_name(coff_sym, coff_strtab);
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TRACE("%d: %s %s\n",
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i, wine_dbgstr_longlong(msc_dbg->module->module.BaseOfImage + base + coff_sym->Value),
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nampnt);
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TRACE("\tAdding global data symbol %s\n", nampnt);
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/*
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* Now we need to figure out which file this guy belongs to.
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*/
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loc.kind = loc_absolute;
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loc.reg = 0;
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loc.offset = msc_dbg->module->module.BaseOfImage + base + coff_sym->Value;
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symt_new_global_variable(msc_dbg->module, NULL, nampnt, TRUE /* FIXME */,
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loc, 0 /* FIXME */, NULL /* FIXME */);
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i += naux;
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continue;
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}
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if (coff_sym->StorageClass == IMAGE_SYM_CLASS_STATIC && naux == 0)
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{
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/*
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* Ignore these. They don't have anything to do with
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* reality.
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*/
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continue;
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}
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TRACE("Skipping unknown entry '%s' %d %d %d\n",
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coff_get_name(coff_sym, coff_strtab),
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coff_sym->StorageClass, coff_sym->SectionNumber, naux);
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/*
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* For now, skip past the aux entries.
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*/
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i += naux;
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}
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if (coff_files.files != NULL)
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{
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/*
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* OK, we now should have a list of files, and we should have a list
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* of entrypoints. We need to sort the entrypoints so that we are
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* able to tie the line numbers with the given functions within the
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* file.
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*/
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for (j = 0; j < coff_files.nfiles; j++)
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{
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if (coff_files.files[j].entries != NULL)
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{
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qsort(coff_files.files[j].entries, coff_files.files[j].neps,
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sizeof(struct symt*), symt_cmp_addr);
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}
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}
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/*
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* Now pick apart the line number tables, and attach the entries
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* to the given functions.
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*/
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for (j = 0; j < coff_files.nfiles; j++)
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{
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l = 0;
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if (coff_files.files[j].neps != 0)
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{
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for (k = 0; k < coff_files.files[j].linecnt; k++)
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{
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linepnt = coff_linetab + coff_files.files[j].linetab_offset + k;
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/*
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* If we have spilled onto the next entrypoint, then
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* bump the counter..
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*/
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for (; l+1 < coff_files.files[j].neps; l++)
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{
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if (symt_get_address(coff_files.files[j].entries[l+1], &addr) &&
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msc_dbg->module->module.BaseOfImage + linepnt->Type.VirtualAddress < addr)
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{
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if (coff_files.files[j].entries[l+1]->tag == SymTagFunction)
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{
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/*
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* Add the line number. This is always relative to the
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* start of the function, so we need to subtract that offset
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* first.
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*/
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symt_add_func_line(msc_dbg->module,
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(struct symt_function*)coff_files.files[j].entries[l+1],
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coff_files.files[j].compiland->source,
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linepnt->Linenumber,
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msc_dbg->module->module.BaseOfImage + linepnt->Type.VirtualAddress - addr);
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}
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break;
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}
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}
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}
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}
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}
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for (j = 0; j < coff_files.nfiles; j++)
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{
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HeapFree(GetProcessHeap(), 0, coff_files.files[j].entries);
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}
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HeapFree(GetProcessHeap(), 0, coff_files.files);
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msc_dbg->module->module.SymType = SymCoff;
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/* FIXME: we could have a finer grain here */
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msc_dbg->module->module.LineNumbers = TRUE;
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msc_dbg->module->module.GlobalSymbols = TRUE;
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msc_dbg->module->module.TypeInfo = FALSE;
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msc_dbg->module->module.SourceIndexed = TRUE;
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msc_dbg->module->module.Publics = TRUE;
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ret = TRUE;
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}
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return ret;
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}
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