1010 lines
35 KiB
C
1010 lines
35 KiB
C
/*
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* File elf.c - processing of ELF files
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*
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* Copyright (C) 1996, Eric Youngdale.
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* 1999-2004 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "config.h"
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#include <assert.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#ifdef HAVE_SYS_MMAN_H
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#include <sys/mman.h>
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#endif
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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#ifndef PATH_MAX
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#define PATH_MAX MAX_PATH
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#endif
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#include "dbghelp_private.h"
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#if defined(__svr4__) || defined(__sun)
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#define __ELF__
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#endif
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#ifdef HAVE_ELF_H
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# include <elf.h>
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#endif
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#ifdef HAVE_SYS_ELF32_H
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# include <sys/elf32.h>
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#endif
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#ifdef HAVE_SYS_EXEC_ELF_H
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# include <sys/exec_elf.h>
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#endif
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#if !defined(DT_NUM)
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# if defined(DT_COUNT)
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# define DT_NUM DT_COUNT
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# else
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/* this seems to be a satisfactory value on Solaris, which doesn't support this AFAICT */
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# define DT_NUM 24
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# endif
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#endif
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#ifdef HAVE_LINK_H
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# include <link.h>
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#endif
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#ifdef HAVE_SYS_LINK_H
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# include <sys/link.h>
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#endif
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#include "wine/debug.h"
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WINE_DEFAULT_DEBUG_CHANNEL(dbghelp);
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struct elf_module_info
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{
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unsigned long elf_addr;
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unsigned short elf_mark : 1,
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elf_loader : 1;
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};
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#ifdef __ELF__
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#define ELF_INFO_DEBUG_HEADER 0x0001
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#define ELF_INFO_MODULE 0x0002
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struct elf_info
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{
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unsigned flags; /* IN one (or several) of the ELF_INFO constants */
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unsigned long dbg_hdr_addr; /* OUT address of debug header (if ELF_INFO_DEBUG_HEADER is set) */
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struct module* module; /* OUT loaded module (if ELF_INFO_MODULE is set) */
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};
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struct symtab_elt
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{
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struct hash_table_elt ht_elt;
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const Elf32_Sym* symp;
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const char* filename;
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unsigned used;
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};
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struct thunk_area
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{
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const char* symname;
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THUNK_ORDINAL ordinal;
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unsigned long rva_start;
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unsigned long rva_end;
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};
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/******************************************************************
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* elf_hash_symtab
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*
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* creating an internal hash table to ease use ELF symtab information lookup
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*/
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static void elf_hash_symtab(const struct module* module, struct pool* pool,
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struct hash_table* ht_symtab, const char* map_addr,
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const Elf32_Shdr* symtab, const Elf32_Shdr* strtab,
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unsigned num_areas, struct thunk_area* thunks)
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{
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int i, j, nsym;
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const char* strp;
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const char* symname;
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const char* filename = NULL;
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const char* ptr;
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const Elf32_Sym* symp;
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struct symtab_elt* ste;
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symp = (const Elf32_Sym*)(map_addr + symtab->sh_offset);
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nsym = symtab->sh_size / sizeof(*symp);
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strp = (const char*)(map_addr + strtab->sh_offset);
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for (j = 0; j < num_areas; j++)
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thunks[j].rva_start = thunks[j].rva_end = 0;
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for (i = 0; i < nsym; i++, symp++)
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{
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/* Ignore certain types of entries which really aren't of that much
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* interest.
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*/
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if (ELF32_ST_TYPE(symp->st_info) == STT_SECTION || symp->st_shndx == SHN_UNDEF)
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{
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continue;
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}
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symname = strp + symp->st_name;
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if (ELF32_ST_TYPE(symp->st_info) == STT_FILE)
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{
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filename = symname;
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continue;
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}
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for (j = 0; j < num_areas; j++)
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{
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if (!strcmp(symname, thunks[j].symname))
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{
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thunks[j].rva_start = symp->st_value;
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thunks[j].rva_end = symp->st_value + symp->st_size;
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break;
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}
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}
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if (j < num_areas) continue;
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ste = pool_alloc(pool, sizeof(*ste));
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/* GCC seems to emit, in some cases, a .<digit>+ suffix.
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* This is used for static variable inside functions, so
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* that we can have several such variables with same name in
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* the same compilation unit
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* We simply ignore that suffix when present (we also get rid
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* of it in stabs parsing)
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*/
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ptr = symname + strlen(symname) - 1;
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ste->ht_elt.name = symname;
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if (isdigit(*ptr))
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{
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while (*ptr >= '0' && *ptr <= '9' && ptr >= symname) ptr--;
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if (ptr > symname && *ptr == '.')
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{
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char* n = pool_alloc(pool, ptr - symname + 1);
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memcpy(n, symname, ptr - symname + 1);
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n[ptr - symname] = '\0';
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ste->ht_elt.name = n;
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}
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}
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ste->symp = symp;
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ste->filename = filename;
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ste->used = 0;
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hash_table_add(ht_symtab, &ste->ht_elt);
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}
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}
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/******************************************************************
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* elf_lookup_symtab
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*
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* lookup a symbol by name in our internal hash table for the symtab
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*/
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static const Elf32_Sym* elf_lookup_symtab(const struct module* module,
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const struct hash_table* ht_symtab,
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const char* name, struct symt* compiland)
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{
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struct symtab_elt* weak_result = NULL; /* without compiland name */
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struct symtab_elt* result = NULL;
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struct hash_table_iter hti;
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struct symtab_elt* ste;
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const char* compiland_name;
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const char* compiland_basename;
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const char* base;
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/* we need weak match up (at least) when symbols of same name,
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* defined several times in different compilation units,
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* are merged in a single one (hence a different filename for c.u.)
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*/
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if (compiland)
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{
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compiland_name = source_get(module,
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((struct symt_compiland*)compiland)->source);
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compiland_basename = strrchr(compiland_name, '/');
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if (!compiland_basename++) compiland_basename = compiland_name;
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}
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else compiland_name = compiland_basename = NULL;
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hash_table_iter_init(ht_symtab, &hti, name);
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while ((ste = hash_table_iter_up(&hti)))
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{
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if (ste->used || strcmp(ste->ht_elt.name, name)) continue;
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weak_result = ste;
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if ((ste->filename && !compiland_name) || (!ste->filename && compiland_name))
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continue;
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if (ste->filename && compiland_name)
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{
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if (strcmp(ste->filename, compiland_name))
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{
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base = strrchr(ste->filename, '/');
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if (!base++) base = ste->filename;
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if (strcmp(base, compiland_basename)) continue;
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}
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}
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if (result)
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{
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FIXME("Already found symbol %s (%s) in symtab %s @%08x and %s @%08x\n",
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name, compiland_name, result->filename, result->symp->st_value,
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ste->filename, ste->symp->st_value);
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}
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else
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{
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result = ste;
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ste->used = 1;
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}
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}
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if (!result && !(result = weak_result))
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{
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FIXME("Couldn't find symbol %s.%s in symtab\n",
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module->module.ModuleName, name);
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return NULL;
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}
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return result->symp;
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}
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/******************************************************************
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* elf_finish_stabs_info
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*
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* - get any relevant information (address & size) from the bits we got from the
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* stabs debugging information
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*/
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static void elf_finish_stabs_info(struct module* module, struct hash_table* symtab)
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{
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struct hash_table_iter hti;
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void* ptr;
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struct symt_ht* sym;
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const Elf32_Sym* symp;
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hash_table_iter_init(&module->ht_symbols, &hti, NULL);
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while ((ptr = hash_table_iter_up(&hti)))
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{
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sym = GET_ENTRY(ptr, struct symt_ht, hash_elt);
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switch (sym->symt.tag)
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{
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case SymTagFunction:
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if (((struct symt_function*)sym)->address != module->elf_info->elf_addr &&
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((struct symt_function*)sym)->size)
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{
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break;
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}
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symp = elf_lookup_symtab(module, symtab, sym->hash_elt.name,
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((struct symt_function*)sym)->container);
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if (symp)
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{
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((struct symt_function*)sym)->address = module->elf_info->elf_addr +
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symp->st_value;
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((struct symt_function*)sym)->size = symp->st_size;
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}
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break;
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case SymTagData:
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switch (((struct symt_data*)sym)->kind)
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{
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case DataIsGlobal:
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case DataIsFileStatic:
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if (((struct symt_data*)sym)->u.address != module->elf_info->elf_addr)
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break;
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symp = elf_lookup_symtab(module, symtab, sym->hash_elt.name,
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((struct symt_data*)sym)->container);
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if (symp)
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{
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((struct symt_data*)sym)->u.address = module->elf_info->elf_addr +
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symp->st_value;
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((struct symt_data*)sym)->kind = (ELF32_ST_BIND(symp->st_info) == STB_LOCAL) ?
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DataIsFileStatic : DataIsGlobal;
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}
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break;
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default:;
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}
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break;
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default:
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FIXME("Unsupported tag %u\n", sym->symt.tag);
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break;
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}
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}
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/* since we may have changed some addresses & sizes, mark the module to be resorted */
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module->sortlist_valid = FALSE;
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}
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/******************************************************************
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* elf_load_wine_thunks
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*
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* creating the thunk objects for a wine native DLL
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*/
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static int elf_new_wine_thunks(struct module* module, struct hash_table* ht_symtab,
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unsigned num_areas, struct thunk_area* thunks)
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{
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int j;
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struct symt_compiland* compiland = NULL;
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const char* compiland_name = NULL;
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struct hash_table_iter hti;
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struct symtab_elt* ste;
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DWORD addr;
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int idx;
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hash_table_iter_init(ht_symtab, &hti, NULL);
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while ((ste = hash_table_iter_up(&hti)))
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{
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if (ste->used) continue;
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/* FIXME: this is not a good idea anyway... we are creating several
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* compiland objects for a same compilation unit
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* We try to cache the last compiland used, but it's not enough
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* (we should here only create compilands if they are not yet
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* defined)
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*/
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if (!compiland_name || compiland_name != ste->filename)
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compiland = symt_new_compiland(module,
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compiland_name = ste->filename);
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addr = module->elf_info->elf_addr + ste->symp->st_value;
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for (j = 0; j < num_areas; j++)
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{
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if (ste->symp->st_value >= thunks[j].rva_start &&
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ste->symp->st_value < thunks[j].rva_end)
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break;
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}
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if (j < num_areas) /* thunk found */
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{
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symt_new_thunk(module, compiland, ste->ht_elt.name, thunks[j].ordinal,
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addr, ste->symp->st_size);
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}
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else
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{
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DWORD ref_addr;
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idx = symt_find_nearest(module, addr);
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if (idx != -1)
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symt_get_info(&module->addr_sorttab[idx]->symt,
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TI_GET_ADDRESS, &ref_addr);
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if (idx == -1 || addr != ref_addr)
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{
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/* creating public symbols for all the ELF symbols which haven't been
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* used yet (ie we have no debug information on them)
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* That's the case, for example, of the .spec.c files
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*/
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if (ELF32_ST_TYPE(ste->symp->st_info) == STT_FUNC)
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{
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symt_new_function(module, compiland, ste->ht_elt.name,
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addr, ste->symp->st_size, NULL);
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}
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else
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{
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symt_new_global_variable(module, compiland, ste->ht_elt.name,
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ELF32_ST_BIND(ste->symp->st_info) == STB_LOCAL,
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addr, ste->symp->st_size, NULL);
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}
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/* FIXME: this is a hack !!!
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* we are adding new symbols, but as we're parsing a symbol table
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* (hopefully without duplicate symbols) we delay rebuilding the sorted
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* module table until we're done with the symbol table
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* Otherwise, as we intertwine symbols's add and lookup, performance
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* is rather bad
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*/
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module->sortlist_valid = TRUE;
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}
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else if (strcmp(ste->ht_elt.name, module->addr_sorttab[idx]->hash_elt.name))
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{
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DWORD xaddr = 0, xsize = 0, kind = -1;
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symt_get_info(&module->addr_sorttab[idx]->symt, TI_GET_ADDRESS, &xaddr);
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symt_get_info(&module->addr_sorttab[idx]->symt, TI_GET_LENGTH, &xsize);
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symt_get_info(&module->addr_sorttab[idx]->symt, TI_GET_DATAKIND, &kind);
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/* If none of symbols has a correct size, we consider they are both markers
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* Hence, we can silence this warning
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* Also, we check that we don't have two symbols, one local, the other
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* global which is legal
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*/
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if ((xsize || ste->symp->st_size) &&
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(kind == (ELF32_ST_BIND(ste->symp->st_info) == STB_LOCAL) ? DataIsFileStatic : DataIsGlobal))
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FIXME("Duplicate in %s: %s<%08lx-%08x> %s<%08lx-%08lx>\n",
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module->module.ModuleName,
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ste->ht_elt.name, addr, ste->symp->st_size,
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module->addr_sorttab[idx]->hash_elt.name, xaddr, xsize);
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}
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}
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}
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/* see comment above */
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module->sortlist_valid = FALSE;
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return TRUE;
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}
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|
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/******************************************************************
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* elf_new_public_symbols
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*
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* Creates a set of public symbols from an ELF symtab
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*/
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static int elf_new_public_symbols(struct module* module, struct hash_table* symtab)
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{
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struct symt_compiland* compiland = NULL;
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const char* compiland_name = NULL;
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struct hash_table_iter hti;
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struct symtab_elt* ste;
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if (dbghelp_options & SYMOPT_NO_PUBLICS) return TRUE;
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|
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/* FIXME: we're missing the ELF entry point here */
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hash_table_iter_init(symtab, &hti, NULL);
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while ((ste = hash_table_iter_up(&hti)))
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|
{
|
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/* FIXME: this is not a good idea anyway... we are creating several
|
|
* compiland objects for a same compilation unit
|
|
* We try to cache the last compiland used, but it's not enough
|
|
* (we should here only create compilands if they are not yet
|
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* defined)
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*/
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if (!compiland_name || compiland_name != ste->filename)
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compiland = symt_new_compiland(module,
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compiland_name = ste->filename);
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symt_new_public(module, compiland, ste->ht_elt.name,
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module->elf_info->elf_addr + ste->symp->st_value,
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ste->symp->st_size, TRUE /* FIXME */,
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ELF32_ST_TYPE(ste->symp->st_info) == STT_FUNC);
|
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}
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return TRUE;
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|
}
|
|
|
|
/******************************************************************
|
|
* elf_load_debug_info
|
|
*
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* Loads the symbolic information from ELF module stored in 'filename'
|
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* the module has been loaded at 'load_offset' address, so symbols' address
|
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* relocation is performed
|
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* returns
|
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* -1 if the file cannot be found/opened
|
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* 0 if the file doesn't contain symbolic info (or this info cannot be
|
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* read or parsed)
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* 1 on success
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*/
|
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BOOL elf_load_debug_info(struct module* module)
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{
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BOOL ret = FALSE;
|
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char* addr = (char*)0xffffffff;
|
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int fd = -1;
|
|
struct stat statbuf;
|
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const Elf32_Ehdr* ehptr;
|
|
const Elf32_Shdr* spnt;
|
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const char* shstrtab;
|
|
int i;
|
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int symtab_sect, dynsym_sect, stab_sect, stabstr_sect, debug_sect;
|
|
struct pool pool;
|
|
struct hash_table ht_symtab;
|
|
struct thunk_area thunks[] =
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{
|
|
{"__wine_spec_import_thunks", THUNK_ORDINAL_NOTYPE, 0, 0}, /* inter DLL calls */
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{"__wine_spec_delayed_import_loaders", THUNK_ORDINAL_LOAD, 0, 0}, /* delayed inter DLL calls */
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|
{"__wine_spec_delayed_import_thunks", THUNK_ORDINAL_LOAD, 0, 0}, /* delayed inter DLL calls */
|
|
{"__wine_delay_load", THUNK_ORDINAL_LOAD, 0, 0}, /* delayed inter DLL calls */
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|
{"__wine_spec_thunk_text_16", -16, 0, 0}, /* 16 => 32 thunks */
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|
{"__wine_spec_thunk_data_16", -16, 0, 0}, /* 16 => 32 thunks */
|
|
{"__wine_spec_thunk_text_32", -32, 0, 0}, /* 32 => 16 thunks */
|
|
{"__wine_spec_thunk_data_32", -32, 0, 0}, /* 32 => 16 thunks */
|
|
};
|
|
|
|
if (module->type != DMT_ELF || !module->elf_info)
|
|
{
|
|
ERR("Bad elf module '%s'\n", module->module.LoadedImageName);
|
|
return FALSE;
|
|
}
|
|
|
|
TRACE("%s\n", module->module.LoadedImageName);
|
|
/* check that the file exists, and that the module hasn't been loaded yet */
|
|
if (stat(module->module.LoadedImageName, &statbuf) == -1) goto leave;
|
|
if (S_ISDIR(statbuf.st_mode)) goto leave;
|
|
|
|
/*
|
|
* Now open the file, so that we can mmap() it.
|
|
*/
|
|
if ((fd = open(module->module.LoadedImageName, O_RDONLY)) == -1) goto leave;
|
|
|
|
/*
|
|
* Now mmap() the file.
|
|
*/
|
|
addr = mmap(0, statbuf.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
|
|
if (addr == (char*)0xffffffff) goto leave;
|
|
|
|
/*
|
|
* Next, we need to find a few of the internal ELF headers within
|
|
* this thing. We need the main executable header, and the section
|
|
* table.
|
|
*/
|
|
ehptr = (Elf32_Ehdr*)addr;
|
|
spnt = (Elf32_Shdr*)(addr + ehptr->e_shoff);
|
|
shstrtab = (addr + spnt[ehptr->e_shstrndx].sh_offset);
|
|
|
|
symtab_sect = dynsym_sect = stab_sect = stabstr_sect = debug_sect = -1;
|
|
|
|
for (i = 0; i < ehptr->e_shnum; i++)
|
|
{
|
|
if (strcmp(shstrtab + spnt[i].sh_name, ".stab") == 0)
|
|
stab_sect = i;
|
|
if (strcmp(shstrtab + spnt[i].sh_name, ".stabstr") == 0)
|
|
stabstr_sect = i;
|
|
if (strcmp(shstrtab + spnt[i].sh_name, ".debug_info") == 0)
|
|
debug_sect = i;
|
|
if ((strcmp(shstrtab + spnt[i].sh_name, ".symtab") == 0) &&
|
|
(spnt[i].sh_type == SHT_SYMTAB))
|
|
symtab_sect = i;
|
|
if ((strcmp(shstrtab + spnt[i].sh_name, ".dynsym") == 0) &&
|
|
(spnt[i].sh_type == SHT_DYNSYM))
|
|
dynsym_sect = i;
|
|
}
|
|
|
|
if (symtab_sect == -1)
|
|
{
|
|
/* if we don't have a symtab but a dynsym, process the dynsym
|
|
* section instead. It'll contain less (relevant) information,
|
|
* but it'll be better than nothing
|
|
*/
|
|
if (dynsym_sect == -1) goto leave;
|
|
symtab_sect = dynsym_sect;
|
|
}
|
|
|
|
module->module.SymType = SymExport;
|
|
/* FIXME: guess a better size from ELF info */
|
|
pool_init(&pool, 65536);
|
|
hash_table_init(&pool, &ht_symtab, 256);
|
|
|
|
/* create a hash table for the symtab */
|
|
elf_hash_symtab(module, &pool, &ht_symtab, addr,
|
|
spnt + symtab_sect, spnt + spnt[symtab_sect].sh_link,
|
|
sizeof(thunks) / sizeof(thunks[0]), thunks);
|
|
|
|
if (!(dbghelp_options & SYMOPT_PUBLICS_ONLY))
|
|
{
|
|
if (stab_sect != -1 && stabstr_sect != -1)
|
|
{
|
|
/* OK, now just parse all of the stabs. */
|
|
ret = stabs_parse(module, addr, module->elf_info->elf_addr,
|
|
spnt[stab_sect].sh_offset, spnt[stab_sect].sh_size,
|
|
spnt[stabstr_sect].sh_offset,
|
|
spnt[stabstr_sect].sh_size);
|
|
if (!ret)
|
|
{
|
|
WARN("Couldn't read correctly read stabs\n");
|
|
goto leave;
|
|
}
|
|
/* and fill in the missing information for stabs */
|
|
elf_finish_stabs_info(module, &ht_symtab);
|
|
}
|
|
else if (debug_sect != -1)
|
|
{
|
|
/* Dwarf 2 debug information */
|
|
FIXME("Unsupported Dwarf2 information for %s\n", module->module.ModuleName);
|
|
}
|
|
}
|
|
if (strstr(module->module.ModuleName, "<elf>") ||
|
|
!strcmp(module->module.ModuleName, "<wine-loader>"))
|
|
{
|
|
/* add the thunks for native libraries */
|
|
if (!(dbghelp_options & SYMOPT_PUBLICS_ONLY))
|
|
elf_new_wine_thunks(module, &ht_symtab,
|
|
sizeof(thunks) / sizeof(thunks[0]), thunks);
|
|
}
|
|
/* add all the public symbols from symtab */
|
|
if (elf_new_public_symbols(module, &ht_symtab) && !ret) ret = TRUE;
|
|
|
|
pool_destroy(&pool);
|
|
|
|
leave:
|
|
if (addr != (char*)0xffffffff) munmap(addr, statbuf.st_size);
|
|
if (fd != -1) close(fd);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/******************************************************************
|
|
* is_dt_flag_valid
|
|
* returns true iff the section tag is valid
|
|
*/
|
|
static unsigned is_dt_flag_valid(unsigned d_tag)
|
|
{
|
|
#ifndef DT_PROCNUM
|
|
#define DT_PROCNUM 0
|
|
#endif
|
|
#ifndef DT_EXTRANUM
|
|
#define DT_EXTRANUM 0
|
|
#endif
|
|
return (d_tag >= 0 && d_tag < DT_NUM + DT_PROCNUM + DT_EXTRANUM)
|
|
#if defined(DT_LOOS) && defined(DT_HIOS)
|
|
|| (d_tag >= DT_LOOS && d_tag < DT_HIOS)
|
|
#endif
|
|
#if defined(DT_LOPROC) && defined(DT_HIPROC)
|
|
|| (d_tag >= DT_LOPROC && d_tag < DT_HIPROC)
|
|
#endif
|
|
;
|
|
}
|
|
|
|
/******************************************************************
|
|
* elf_load_file
|
|
*
|
|
* Loads the information for ELF module stored in 'filename'
|
|
* the module has been loaded at 'load_offset' address
|
|
* returns
|
|
* -1 if the file cannot be found/opened
|
|
* 0 if the file doesn't contain symbolic info (or this info cannot be
|
|
* read or parsed)
|
|
* 1 on success
|
|
*/
|
|
static BOOL elf_load_file(struct process* pcs, const char* filename,
|
|
unsigned long load_offset, struct elf_info* elf_info)
|
|
{
|
|
static const BYTE elf_signature[4] = { ELFMAG0, ELFMAG1, ELFMAG2, ELFMAG3 };
|
|
BOOL ret = FALSE;
|
|
const char* addr = (char*)0xffffffff;
|
|
int fd = -1;
|
|
struct stat statbuf;
|
|
const Elf32_Ehdr* ehptr;
|
|
const Elf32_Shdr* spnt;
|
|
const Elf32_Phdr* ppnt;
|
|
const char* shstrtab;
|
|
int i;
|
|
DWORD size, start;
|
|
unsigned tmp, page_mask = getpagesize() - 1;
|
|
|
|
TRACE("Processing elf file '%s' at %08lx\n", filename, load_offset);
|
|
|
|
/* check that the file exists, and that the module hasn't been loaded yet */
|
|
if (stat(filename, &statbuf) == -1) goto leave;
|
|
|
|
/* Now open the file, so that we can mmap() it. */
|
|
if ((fd = open(filename, O_RDONLY)) == -1) goto leave;
|
|
|
|
/* Now mmap() the file. */
|
|
addr = mmap(0, statbuf.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
|
|
if (addr == (char*)-1) goto leave;
|
|
|
|
/* Next, we need to find a few of the internal ELF headers within
|
|
* this thing. We need the main executable header, and the section
|
|
* table.
|
|
*/
|
|
ehptr = (const Elf32_Ehdr*)addr;
|
|
if (memcmp(ehptr->e_ident, elf_signature, sizeof(elf_signature))) goto leave;
|
|
|
|
spnt = (const Elf32_Shdr*)(addr + ehptr->e_shoff);
|
|
shstrtab = (addr + spnt[ehptr->e_shstrndx].sh_offset);
|
|
|
|
/* grab size of module once loaded in memory */
|
|
ppnt = (const Elf32_Phdr*)(addr + ehptr->e_phoff);
|
|
size = 0; start = ~0L;
|
|
|
|
for (i = 0; i < ehptr->e_phnum; i++)
|
|
{
|
|
if (ppnt[i].p_type == PT_LOAD)
|
|
{
|
|
tmp = (ppnt[i].p_vaddr + ppnt[i].p_memsz + page_mask) & ~page_mask;
|
|
if (size < tmp) size = tmp;
|
|
if (ppnt[i].p_vaddr < start) start = ppnt[i].p_vaddr;
|
|
}
|
|
}
|
|
|
|
/* if non relocatable ELF, then remove fixed address from computation
|
|
* otherwise, all addresses are zero based and start has no effect
|
|
*/
|
|
size -= start;
|
|
if (!start && !load_offset)
|
|
ERR("Relocatable ELF %s, but no load address. Loading at 0x0000000\n",
|
|
filename);
|
|
if (start && load_offset)
|
|
{
|
|
WARN("Non-relocatable ELF %s, but load address of 0x%08lx supplied. "
|
|
"Assuming load address is corrupt\n", filename, load_offset);
|
|
load_offset = 0;
|
|
}
|
|
|
|
if (elf_info->flags & ELF_INFO_DEBUG_HEADER)
|
|
{
|
|
for (i = 0; i < ehptr->e_shnum; i++)
|
|
{
|
|
if (strcmp(shstrtab + spnt[i].sh_name, ".dynamic") == 0 &&
|
|
spnt[i].sh_type == SHT_DYNAMIC)
|
|
{
|
|
Elf32_Dyn dyn;
|
|
char* ptr = (char*)spnt[i].sh_addr;
|
|
unsigned long len;
|
|
|
|
do
|
|
{
|
|
if (!ReadProcessMemory(pcs->handle, ptr, &dyn, sizeof(dyn), &len) ||
|
|
len != sizeof(dyn) || !is_dt_flag_valid(dyn.d_tag))
|
|
dyn.d_tag = DT_NULL;
|
|
ptr += sizeof(dyn);
|
|
} while (dyn.d_tag != DT_DEBUG && dyn.d_tag != DT_NULL);
|
|
if (dyn.d_tag == DT_NULL) goto leave;
|
|
elf_info->dbg_hdr_addr = dyn.d_un.d_ptr;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (elf_info->flags & ELF_INFO_MODULE)
|
|
{
|
|
elf_info->module = module_new(pcs, filename, DMT_ELF,
|
|
(load_offset) ? load_offset : start,
|
|
size, 0, 0);
|
|
if (!elf_info->module) goto leave;
|
|
elf_info->module->elf_info = HeapAlloc(GetProcessHeap(),
|
|
0, sizeof(struct elf_module_info));
|
|
if (elf_info->module->elf_info == NULL)
|
|
{
|
|
ERR("OOM\n");
|
|
exit(0); /* FIXME */
|
|
}
|
|
elf_info->module->elf_info->elf_addr = load_offset;
|
|
|
|
if (dbghelp_options & SYMOPT_DEFERRED_LOADS)
|
|
{
|
|
elf_info->module->module.SymType = SymDeferred;
|
|
ret = TRUE;
|
|
}
|
|
else ret = elf_load_debug_info(elf_info->module);
|
|
|
|
elf_info->module->elf_info->elf_mark = 1;
|
|
elf_info->module->elf_info->elf_loader = 0;
|
|
} else ret = TRUE;
|
|
|
|
leave:
|
|
if (addr != (char*)0xffffffff) munmap((void*)addr, statbuf.st_size);
|
|
if (fd != -1) close(fd);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/******************************************************************
|
|
* elf_load_file_from_path
|
|
* tries to load an ELF file from a set of paths (separated by ':')
|
|
*/
|
|
static BOOL elf_load_file_from_path(HANDLE hProcess,
|
|
const char* filename,
|
|
unsigned long load_offset,
|
|
const char* path,
|
|
struct elf_info* elf_info)
|
|
{
|
|
BOOL ret = FALSE;
|
|
char *s, *t, *fn;
|
|
char* paths = NULL;
|
|
|
|
if (!path) return FALSE;
|
|
|
|
paths = strcpy(HeapAlloc(GetProcessHeap(), 0, strlen(path) + 1), path);
|
|
for (s = paths; s && *s; s = (t) ? (t+1) : NULL)
|
|
{
|
|
t = strchr(s, ':');
|
|
if (t) *t = '\0';
|
|
fn = HeapAlloc(GetProcessHeap(), 0, strlen(filename) + 1 + strlen(s) + 1);
|
|
if (!fn) break;
|
|
strcpy(fn, s);
|
|
strcat(fn, "/");
|
|
strcat(fn, filename);
|
|
ret = elf_load_file(hProcess, fn, load_offset, elf_info);
|
|
HeapFree(GetProcessHeap(), 0, fn);
|
|
if (ret) break;
|
|
s = (t) ? (t+1) : NULL;
|
|
}
|
|
|
|
HeapFree(GetProcessHeap(), 0, paths);
|
|
return ret;
|
|
}
|
|
|
|
/******************************************************************
|
|
* elf_search_and_load_file
|
|
*
|
|
* lookup a file in standard ELF locations, and if found, load it
|
|
*/
|
|
static BOOL elf_search_and_load_file(struct process* pcs, const char* filename,
|
|
unsigned long load_offset,
|
|
struct elf_info* elf_info)
|
|
{
|
|
BOOL ret = FALSE;
|
|
struct module* module;
|
|
|
|
if (filename == NULL || *filename == '\0') return FALSE;
|
|
if ((module = module_find_by_name(pcs, filename, DMT_ELF)))
|
|
{
|
|
elf_info->module = module;
|
|
module->elf_info->elf_mark = 1;
|
|
return module->module.SymType;
|
|
}
|
|
|
|
if (strstr(filename, "libstdc++")) return FALSE; /* We know we can't do it */
|
|
ret = elf_load_file(pcs, filename, load_offset, elf_info);
|
|
/* if relative pathname, try some absolute base dirs */
|
|
if (!ret && !strchr(filename, '/'))
|
|
{
|
|
ret = elf_load_file_from_path(pcs, filename, load_offset,
|
|
getenv("PATH"), elf_info) ||
|
|
elf_load_file_from_path(pcs, filename, load_offset,
|
|
getenv("LD_LIBRARY_PATH"), elf_info) ||
|
|
elf_load_file_from_path(pcs, filename, load_offset,
|
|
getenv("WINEDLLPATH"), elf_info);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/******************************************************************
|
|
* elf_synchronize_module_list
|
|
*
|
|
* this functions rescans the debuggee module's list and synchronizes it with
|
|
* the one from 'pcs', ie:
|
|
* - if a module is in debuggee and not in pcs, it's loaded into pcs
|
|
* - if a module is in pcs and not in debuggee, it's unloaded from pcs
|
|
*/
|
|
BOOL elf_synchronize_module_list(struct process* pcs)
|
|
{
|
|
struct r_debug dbg_hdr;
|
|
void* lm_addr;
|
|
struct link_map lm;
|
|
char bufstr[256];
|
|
struct elf_info elf_info;
|
|
struct module* module;
|
|
|
|
if (!pcs->dbg_hdr_addr) return FALSE;
|
|
if (!read_mem(pcs->handle, pcs->dbg_hdr_addr, &dbg_hdr, sizeof(dbg_hdr)))
|
|
return FALSE;
|
|
|
|
for (module = pcs->lmodules; module; module = module->next)
|
|
{
|
|
if (module->type == DMT_ELF) module->elf_info->elf_mark = 0;
|
|
}
|
|
|
|
elf_info.flags = ELF_INFO_MODULE;
|
|
/* Now walk the linked list. In all known ELF implementations,
|
|
* the dynamic loader maintains this linked list for us. In some
|
|
* cases the first entry doesn't appear with a name, in other cases it
|
|
* does.
|
|
*/
|
|
for (lm_addr = (void*)dbg_hdr.r_map; lm_addr; lm_addr = (void*)lm.l_next)
|
|
{
|
|
if (!read_mem(pcs->handle, (ULONG)lm_addr, &lm, sizeof(lm)))
|
|
return FALSE;
|
|
|
|
if (lm.l_prev != NULL && /* skip first entry, normally debuggee itself */
|
|
lm.l_name != NULL &&
|
|
read_mem(pcs->handle, (ULONG)lm.l_name, bufstr, sizeof(bufstr)))
|
|
{
|
|
bufstr[sizeof(bufstr) - 1] = '\0';
|
|
elf_search_and_load_file(pcs, bufstr, (unsigned long)lm.l_addr,
|
|
&elf_info);
|
|
}
|
|
}
|
|
|
|
for (module = pcs->lmodules; module; module = module->next)
|
|
{
|
|
if (module->type == DMT_ELF && !module->elf_info->elf_mark &&
|
|
!module->elf_info->elf_loader)
|
|
{
|
|
module_remove(pcs, module);
|
|
/* restart all over */
|
|
module = pcs->lmodules;
|
|
}
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
/******************************************************************
|
|
* elf_read_wine_loader_dbg_info
|
|
*
|
|
* Try to find a decent wine executable which could have loaded the debuggee
|
|
*/
|
|
BOOL elf_read_wine_loader_dbg_info(struct process* pcs)
|
|
{
|
|
const char* ptr;
|
|
struct elf_info elf_info;
|
|
BOOL ret;
|
|
|
|
elf_info.flags = ELF_INFO_DEBUG_HEADER | ELF_INFO_MODULE;
|
|
/* All binaries are loaded with WINELOADER (if run from tree) or by the
|
|
* main executable (either wine-kthread or wine-pthread)
|
|
* Note: the heuristic use to know whether we need to load wine-pthread or
|
|
* wine-kthread is not 100% safe
|
|
*/
|
|
if ((ptr = getenv("WINELOADER")))
|
|
ret = elf_search_and_load_file(pcs, ptr, 0, &elf_info);
|
|
else
|
|
{
|
|
ret = elf_search_and_load_file(pcs, "wine-kthread", 0, &elf_info) ||
|
|
elf_search_and_load_file(pcs, "wine-pthread", 0, &elf_info);
|
|
}
|
|
if (!ret) return FALSE;
|
|
elf_info.module->elf_info->elf_loader = 1;
|
|
strcpy(elf_info.module->module.ModuleName, "<wine-loader>");
|
|
return (pcs->dbg_hdr_addr = elf_info.dbg_hdr_addr) != 0;
|
|
}
|
|
|
|
/******************************************************************
|
|
* elf_load_module
|
|
*
|
|
* loads an ELF module and stores it in process' module list
|
|
* if 'sync' is TRUE, let's find module real name and load address from
|
|
* the real loaded modules list in pcs address space
|
|
*/
|
|
struct module* elf_load_module(struct process* pcs, const char* name)
|
|
{
|
|
struct elf_info elf_info;
|
|
BOOL ret = FALSE;
|
|
const char* p;
|
|
const char* xname;
|
|
struct r_debug dbg_hdr;
|
|
void* lm_addr;
|
|
struct link_map lm;
|
|
char bufstr[256];
|
|
|
|
TRACE("(%p %s)\n", pcs, name);
|
|
|
|
elf_info.flags = ELF_INFO_MODULE;
|
|
|
|
/* do only the lookup from the filename, not the path (as we lookup module name
|
|
* in the process' loaded module list)
|
|
*/
|
|
xname = strrchr(name, '/');
|
|
if (!xname++) xname = name;
|
|
|
|
if (!read_mem(pcs->handle, pcs->dbg_hdr_addr, &dbg_hdr, sizeof(dbg_hdr)))
|
|
return NULL;
|
|
|
|
for (lm_addr = (void*)dbg_hdr.r_map; lm_addr; lm_addr = (void*)lm.l_next)
|
|
{
|
|
if (!read_mem(pcs->handle, (ULONG)lm_addr, &lm, sizeof(lm)))
|
|
return NULL;
|
|
|
|
if (lm.l_prev != NULL && /* skip first entry, normally debuggee itself */
|
|
lm.l_name != NULL &&
|
|
read_mem(pcs->handle, (ULONG)lm.l_name, bufstr, sizeof(bufstr)))
|
|
{
|
|
bufstr[sizeof(bufstr) - 1] = '\0';
|
|
/* memcmp is needed for matches when bufstr contains also version information
|
|
* name: libc.so, bufstr: libc.so.6.0
|
|
*/
|
|
p = strrchr(bufstr, '/');
|
|
if (!p++) p = bufstr;
|
|
if (!memcmp(p, xname, strlen(xname)))
|
|
{
|
|
ret = elf_search_and_load_file(pcs, bufstr,
|
|
(unsigned long)lm.l_addr, &elf_info);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (!lm_addr || !ret) return NULL;
|
|
assert(elf_info.module);
|
|
return elf_info.module;
|
|
}
|
|
|
|
#else /* !__ELF__ */
|
|
|
|
BOOL elf_synchronize_module_list(struct process* pcs)
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
BOOL elf_read_wine_loader_dbg_info(struct process* pcs)
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
struct module* elf_load_module(struct process* pcs, const char* name)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
BOOL elf_load_debug_info(struct module* module)
|
|
{
|
|
return FALSE;
|
|
}
|
|
#endif /* __ELF__ */
|