|
|
/* Read the export table symbols from a portable executable and
|
|
|
convert to internal format, for GDB. Used as a last resort if no
|
|
|
debugging symbols recognized.
|
|
|
|
|
|
Copyright (C) 2003-2022 Free Software Foundation, Inc.
|
|
|
|
|
|
This file is part of GDB.
|
|
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
|
it under the terms of the GNU General Public License as published by
|
|
|
the Free Software Foundation; either version 3 of the License, or
|
|
|
(at your option) any later version.
|
|
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
|
GNU General Public License for more details.
|
|
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
|
|
Contributed by Raoul M. Gough (RaoulGough@yahoo.co.uk). */
|
|
|
|
|
|
#include "defs.h"
|
|
|
|
|
|
#include "coff-pe-read.h"
|
|
|
|
|
|
#include "bfd.h"
|
|
|
#include "gdbtypes.h"
|
|
|
|
|
|
#include "command.h"
|
|
|
#include "gdbcmd.h"
|
|
|
#include "symtab.h"
|
|
|
#include "symfile.h"
|
|
|
#include "objfiles.h"
|
|
|
#include "gdbsupport/common-utils.h"
|
|
|
#include "coff/internal.h"
|
|
|
|
|
|
#include <ctype.h>
|
|
|
|
|
|
/* Internal section information */
|
|
|
|
|
|
/* Coff PE read debugging flag:
|
|
|
default value is 0,
|
|
|
value 1 outputs problems encountered while parsing PE file,
|
|
|
value above 1 also lists all generated minimal symbols. */
|
|
|
static unsigned int debug_coff_pe_read;
|
|
|
|
|
|
struct read_pe_section_data
|
|
|
{
|
|
|
CORE_ADDR vma_offset; /* Offset to loaded address of section. */
|
|
|
unsigned long rva_start; /* Start offset within the pe. */
|
|
|
unsigned long rva_end; /* End offset within the pe. */
|
|
|
enum minimal_symbol_type ms_type; /* Type to assign symbols in
|
|
|
section. */
|
|
|
unsigned int index; /* BFD section number. */
|
|
|
std::string section_name; /* Recorded section name. */
|
|
|
};
|
|
|
|
|
|
#define IMAGE_SCN_CNT_CODE 0x20
|
|
|
#define IMAGE_SCN_CNT_INITIALIZED_DATA 0x40
|
|
|
#define IMAGE_SCN_CNT_UNINITIALIZED_DATA 0x80
|
|
|
#define PE_SECTION_INDEX_TEXT 0
|
|
|
#define PE_SECTION_INDEX_DATA 1
|
|
|
#define PE_SECTION_INDEX_BSS 2
|
|
|
#define PE_SECTION_TABLE_SIZE 3
|
|
|
#define PE_SECTION_INDEX_INVALID -1
|
|
|
|
|
|
/* Get the index of the named section in our own array, which contains
|
|
|
text, data and bss in that order. Return PE_SECTION_INDEX_INVALID
|
|
|
if passed an unrecognised section name. */
|
|
|
|
|
|
static int
|
|
|
read_pe_section_index (const char *section_name)
|
|
|
{
|
|
|
if (strcmp (section_name, ".text") == 0)
|
|
|
{
|
|
|
return PE_SECTION_INDEX_TEXT;
|
|
|
}
|
|
|
|
|
|
else if (strcmp (section_name, ".data") == 0)
|
|
|
{
|
|
|
return PE_SECTION_INDEX_DATA;
|
|
|
}
|
|
|
|
|
|
else if (strcmp (section_name, ".bss") == 0)
|
|
|
{
|
|
|
return PE_SECTION_INDEX_BSS;
|
|
|
}
|
|
|
|
|
|
else
|
|
|
{
|
|
|
return PE_SECTION_INDEX_INVALID;
|
|
|
}
|
|
|
}
|
|
|
|
|
|
/* Get the index of the named section in our own full array.
|
|
|
text, data and bss in that order. Return PE_SECTION_INDEX_INVALID
|
|
|
if passed an unrecognised section name. */
|
|
|
|
|
|
static int
|
|
|
get_pe_section_index (const char *section_name,
|
|
|
const std::vector<read_pe_section_data> §ions)
|
|
|
{
|
|
|
for (int i = 0; i < sections.size (); i++)
|
|
|
if (sections[i].section_name == section_name)
|
|
|
return i;
|
|
|
return PE_SECTION_INDEX_INVALID;
|
|
|
}
|
|
|
|
|
|
|
|
|
/* Create a minimal symbol entry for an exported symbol.
|
|
|
SYM_NAME contains the exported name or NULL if exported by ordinal,
|
|
|
FUNC_RVA contains the Relative Virtual Address of the symbol,
|
|
|
ORDINAL is the ordinal index value of the symbol,
|
|
|
SECTION_DATA contains information about the section in which the
|
|
|
symbol is declared,
|
|
|
DLL_NAME is the internal name of the DLL file,
|
|
|
OBJFILE is the objfile struct of DLL_NAME. */
|
|
|
|
|
|
static void
|
|
|
add_pe_exported_sym (minimal_symbol_reader &reader,
|
|
|
const char *sym_name,
|
|
|
unsigned long func_rva,
|
|
|
int ordinal,
|
|
|
const struct read_pe_section_data *section_data,
|
|
|
const char *dll_name, struct objfile *objfile)
|
|
|
{
|
|
|
/* Add the stored offset to get the loaded address of the symbol. */
|
|
|
CORE_ADDR vma = func_rva + section_data->vma_offset;
|
|
|
|
|
|
/* Generate a (hopefully unique) qualified name using the first part
|
|
|
of the dll name, e.g. KERNEL32!AddAtomA. This matches the style
|
|
|
used by windbg from the "Microsoft Debugging Tools for Windows". */
|
|
|
|
|
|
std::string bare_name;
|
|
|
if (sym_name == NULL || *sym_name == '\0')
|
|
|
bare_name = string_printf ("#%d", ordinal);
|
|
|
else
|
|
|
bare_name = sym_name;
|
|
|
|
|
|
std::string qualified_name
|
|
|
= string_printf ("%s!%s", dll_name, bare_name.c_str ());
|
|
|
|
|
|
if ((section_data->ms_type == mst_unknown) && debug_coff_pe_read)
|
|
|
gdb_printf (gdb_stdlog , _("Unknown section type for \"%s\""
|
|
|
" for entry \"%s\" in dll \"%s\"\n"),
|
|
|
section_data->section_name.c_str (), sym_name,
|
|
|
dll_name);
|
|
|
|
|
|
reader.record_with_info (qualified_name.c_str (), vma, section_data->ms_type,
|
|
|
section_data->index);
|
|
|
|
|
|
/* Enter the plain name as well, which might not be unique. */
|
|
|
reader.record_with_info (bare_name.c_str (), vma, section_data->ms_type,
|
|
|
section_data->index);
|
|
|
if (debug_coff_pe_read > 1)
|
|
|
gdb_printf (gdb_stdlog, _("Adding exported symbol \"%s\""
|
|
|
" in dll \"%s\"\n"), sym_name, dll_name);
|
|
|
}
|
|
|
|
|
|
/* Create a minimal symbol entry for an exported forward symbol.
|
|
|
Return 1 if the forwarded function was found 0 otherwise.
|
|
|
SYM_NAME contains the exported name or NULL if exported by ordinal,
|
|
|
FORWARD_DLL_NAME is the name of the DLL in which the target symobl resides,
|
|
|
FORWARD_FUNC_NAME is the name of the target symbol in that DLL,
|
|
|
ORDINAL is the ordinal index value of the symbol,
|
|
|
DLL_NAME is the internal name of the DLL file,
|
|
|
OBJFILE is the objfile struct of DLL_NAME. */
|
|
|
|
|
|
static int
|
|
|
add_pe_forwarded_sym (minimal_symbol_reader &reader,
|
|
|
const char *sym_name, const char *forward_dll_name,
|
|
|
const char *forward_func_name, int ordinal,
|
|
|
const char *dll_name, struct objfile *objfile)
|
|
|
{
|
|
|
CORE_ADDR vma, baseaddr;
|
|
|
struct bound_minimal_symbol msymbol;
|
|
|
enum minimal_symbol_type msymtype;
|
|
|
int forward_dll_name_len = strlen (forward_dll_name);
|
|
|
short section;
|
|
|
|
|
|
std::string forward_qualified_name = string_printf ("%s!%s",
|
|
|
forward_dll_name,
|
|
|
forward_func_name);
|
|
|
|
|
|
msymbol = lookup_bound_minimal_symbol (forward_qualified_name.c_str ());
|
|
|
|
|
|
if (!msymbol.minsym)
|
|
|
{
|
|
|
int i;
|
|
|
|
|
|
for (i = 0; i < forward_dll_name_len; i++)
|
|
|
forward_qualified_name[i] = tolower (forward_qualified_name[i]);
|
|
|
msymbol = lookup_bound_minimal_symbol (forward_qualified_name.c_str ());
|
|
|
}
|
|
|
|
|
|
if (!msymbol.minsym)
|
|
|
{
|
|
|
if (debug_coff_pe_read)
|
|
|
gdb_printf (gdb_stdlog, _("Unable to find function \"%s\" in"
|
|
|
" dll \"%s\", forward of \"%s\" in dll \"%s\"\n"),
|
|
|
forward_func_name, forward_dll_name, sym_name,
|
|
|
dll_name);
|
|
|
return 0;
|
|
|
}
|
|
|
|
|
|
if (debug_coff_pe_read > 1)
|
|
|
gdb_printf (gdb_stdlog, _("Adding forwarded exported symbol"
|
|
|
" \"%s\" in dll \"%s\", pointing to \"%s\"\n"),
|
|
|
sym_name, dll_name, forward_qualified_name.c_str ());
|
|
|
|
|
|
vma = msymbol.value_address ();
|
|
|
msymtype = msymbol.minsym->type ();
|
|
|
section = msymbol.minsym->section_index ();
|
|
|
|
|
|
/* Generate a (hopefully unique) qualified name using the first part
|
|
|
of the dll name, e.g. KERNEL32!AddAtomA. This matches the style
|
|
|
used by windbg from the "Microsoft Debugging Tools for Windows". */
|
|
|
|
|
|
std::string bare_name;
|
|
|
if (sym_name == NULL || *sym_name == '\0')
|
|
|
bare_name = string_printf ("#%d", ordinal);
|
|
|
else
|
|
|
bare_name = sym_name;
|
|
|
|
|
|
std::string qualified_name
|
|
|
= string_printf ("%s!%s", dll_name, bare_name.c_str ());
|
|
|
|
|
|
/* Note that this code makes a minimal symbol whose value may point
|
|
|
outside of any section in this objfile. These symbols can't
|
|
|
really be relocated properly, but nevertheless we make a stab at
|
|
|
it, choosing an approach consistent with the history of this
|
|
|
code. */
|
|
|
baseaddr = objfile->text_section_offset ();
|
|
|
|
|
|
reader.record_with_info (qualified_name.c_str (), vma - baseaddr, msymtype,
|
|
|
section);
|
|
|
|
|
|
/* Enter the plain name as well, which might not be unique. */
|
|
|
reader.record_with_info (bare_name.c_str(), vma - baseaddr, msymtype,
|
|
|
section);
|
|
|
|
|
|
return 1;
|
|
|
}
|
|
|
|
|
|
/* Truncate a dll_name at the last dot character. */
|
|
|
|
|
|
static void
|
|
|
read_pe_truncate_name (char *dll_name)
|
|
|
{
|
|
|
char *last_point = strrchr (dll_name, '.');
|
|
|
|
|
|
if (last_point != NULL)
|
|
|
*last_point = '\0';
|
|
|
}
|
|
|
|
|
|
/* Low-level support functions, direct from the ld module pe-dll.c. */
|
|
|
static unsigned int
|
|
|
pe_get16 (bfd *abfd, int where)
|
|
|
{
|
|
|
unsigned char b[2];
|
|
|
|
|
|
bfd_seek (abfd, (file_ptr) where, SEEK_SET);
|
|
|
bfd_bread (b, (bfd_size_type) 2, abfd);
|
|
|
return b[0] + (b[1] << 8);
|
|
|
}
|
|
|
|
|
|
static unsigned int
|
|
|
pe_get32 (bfd *abfd, int where)
|
|
|
{
|
|
|
unsigned char b[4];
|
|
|
|
|
|
bfd_seek (abfd, (file_ptr) where, SEEK_SET);
|
|
|
bfd_bread (b, (bfd_size_type) 4, abfd);
|
|
|
return b[0] + (b[1] << 8) + (b[2] << 16) + (b[3] << 24);
|
|
|
}
|
|
|
|
|
|
static unsigned int
|
|
|
pe_as16 (void *ptr)
|
|
|
{
|
|
|
unsigned char *b = (unsigned char *) ptr;
|
|
|
|
|
|
return b[0] + (b[1] << 8);
|
|
|
}
|
|
|
|
|
|
static unsigned int
|
|
|
pe_as32 (void *ptr)
|
|
|
{
|
|
|
unsigned char *b = (unsigned char *) ptr;
|
|
|
|
|
|
return b[0] + (b[1] << 8) + (b[2] << 16) + (b[3] << 24);
|
|
|
}
|
|
|
|
|
|
/* Read the (non-debug) export symbol table from a portable
|
|
|
executable. Code originally lifted from the ld function
|
|
|
pe_implied_import_dll in pe-dll.c. */
|
|
|
|
|
|
void
|
|
|
read_pe_exported_syms (minimal_symbol_reader &reader,
|
|
|
struct objfile *objfile)
|
|
|
{
|
|
|
bfd *dll = objfile->obfd;
|
|
|
unsigned long nbnormal, nbforward;
|
|
|
unsigned long pe_header_offset, opthdr_ofs, num_entries, i;
|
|
|
unsigned long export_opthdrrva, export_opthdrsize;
|
|
|
unsigned long export_rva, export_size, nsections, secptr, expptr;
|
|
|
unsigned long exp_funcbase;
|
|
|
unsigned char *expdata, *erva;
|
|
|
unsigned long name_rvas, ordinals, nexp, ordbase;
|
|
|
int otherix = PE_SECTION_TABLE_SIZE;
|
|
|
int is_pe64 = 0;
|
|
|
int is_pe32 = 0;
|
|
|
|
|
|
char const *target = bfd_get_target (objfile->obfd);
|
|
|
|
|
|
std::vector<struct read_pe_section_data> section_data
|
|
|
(PE_SECTION_TABLE_SIZE);
|
|
|
|
|
|
for (i=0; i < PE_SECTION_TABLE_SIZE; i++)
|
|
|
{
|
|
|
section_data[i].vma_offset = 0;
|
|
|
section_data[i].rva_start = 1;
|
|
|
section_data[i].rva_end = 0;
|
|
|
};
|
|
|
section_data[PE_SECTION_INDEX_TEXT].ms_type = mst_text;
|
|
|
section_data[PE_SECTION_INDEX_TEXT].section_name = ".text";
|
|
|
section_data[PE_SECTION_INDEX_DATA].ms_type = mst_data;
|
|
|
section_data[PE_SECTION_INDEX_DATA].section_name = ".data";
|
|
|
section_data[PE_SECTION_INDEX_BSS].ms_type = mst_bss;
|
|
|
section_data[PE_SECTION_INDEX_BSS].section_name = ".bss";
|
|
|
|
|
|
is_pe64 = (strcmp (target, "pe-x86-64") == 0
|
|
|
|| strcmp (target, "pei-x86-64") == 0);
|
|
|
is_pe32 = (strcmp (target, "pe-i386") == 0
|
|
|
|| strcmp (target, "pei-i386") == 0
|
|
|
|| strcmp (target, "pe-arm-wince-little") == 0
|
|
|
|| strcmp (target, "pei-arm-wince-little") == 0);
|
|
|
if (!is_pe32 && !is_pe64)
|
|
|
{
|
|
|
/* This is not a recognized PE format file. Abort now, because
|
|
|
the code is untested on anything else. *FIXME* test on
|
|
|
further architectures and loosen or remove this test. */
|
|
|
return;
|
|
|
}
|
|
|
|
|
|
/* Get pe_header, optional header and numbers of export entries. */
|
|
|
pe_header_offset = pe_get32 (dll, 0x3c);
|
|
|
opthdr_ofs = pe_header_offset + 4 + 20;
|
|
|
if (is_pe64)
|
|
|
num_entries = pe_get32 (dll, opthdr_ofs + 108);
|
|
|
else
|
|
|
num_entries = pe_get32 (dll, opthdr_ofs + 92);
|
|
|
|
|
|
if (num_entries < 1) /* No exports. */
|
|
|
return;
|
|
|
if (is_pe64)
|
|
|
{
|
|
|
export_opthdrrva = pe_get32 (dll, opthdr_ofs + 112);
|
|
|
export_opthdrsize = pe_get32 (dll, opthdr_ofs + 116);
|
|
|
}
|
|
|
else
|
|
|
{
|
|
|
export_opthdrrva = pe_get32 (dll, opthdr_ofs + 96);
|
|
|
export_opthdrsize = pe_get32 (dll, opthdr_ofs + 100);
|
|
|
}
|
|
|
nsections = pe_get16 (dll, pe_header_offset + 4 + 2);
|
|
|
secptr = (pe_header_offset + 4 + 20 +
|
|
|
pe_get16 (dll, pe_header_offset + 4 + 16));
|
|
|
expptr = 0;
|
|
|
export_size = 0;
|
|
|
|
|
|
/* Get the rva and size of the export section. */
|
|
|
for (i = 0; i < nsections; i++)
|
|
|
{
|
|
|
char sname[8];
|
|
|
unsigned long secptr1 = secptr + 40 * i;
|
|
|
unsigned long vaddr = pe_get32 (dll, secptr1 + 12);
|
|
|
unsigned long vsize = pe_get32 (dll, secptr1 + 16);
|
|
|
unsigned long fptr = pe_get32 (dll, secptr1 + 20);
|
|
|
|
|
|
bfd_seek (dll, (file_ptr) secptr1, SEEK_SET);
|
|
|
bfd_bread (sname, (bfd_size_type) sizeof (sname), dll);
|
|
|
|
|
|
if ((strcmp (sname, ".edata") == 0)
|
|
|
|| (vaddr <= export_opthdrrva && export_opthdrrva < vaddr + vsize))
|
|
|
{
|
|
|
if (strcmp (sname, ".edata") != 0)
|
|
|
{
|
|
|
if (debug_coff_pe_read)
|
|
|
gdb_printf (gdb_stdlog, _("Export RVA for dll "
|
|
|
"\"%s\" is in section \"%s\"\n"),
|
|
|
bfd_get_filename (dll), sname);
|
|
|
}
|
|
|
else if (export_opthdrrva != vaddr && debug_coff_pe_read)
|
|
|
gdb_printf (gdb_stdlog, _("Wrong value of export RVA"
|
|
|
" for dll \"%s\": 0x%lx instead of 0x%lx\n"),
|
|
|
bfd_get_filename (dll), export_opthdrrva, vaddr);
|
|
|
expptr = fptr + (export_opthdrrva - vaddr);
|
|
|
break;
|
|
|
}
|
|
|
}
|
|
|
|
|
|
if (expptr == 0)
|
|
|
{
|
|
|
/* no section contains export table rva */
|
|
|
return;
|
|
|
}
|
|
|
|
|
|
export_rva = export_opthdrrva;
|
|
|
export_size = export_opthdrsize;
|
|
|
|
|
|
if (export_size == 0)
|
|
|
{
|
|
|
/* Empty export table. */
|
|
|
return;
|
|
|
}
|
|
|
|
|
|
/* Scan sections and store the base and size of the relevant
|
|
|
sections. */
|
|
|
for (i = 0; i < nsections; i++)
|
|
|
{
|
|
|
unsigned long secptr1 = secptr + 40 * i;
|
|
|
unsigned long vsize = pe_get32 (dll, secptr1 + 8);
|
|
|
unsigned long vaddr = pe_get32 (dll, secptr1 + 12);
|
|
|
unsigned long characteristics = pe_get32 (dll, secptr1 + 36);
|
|
|
char sec_name[SCNNMLEN + 1];
|
|
|
int sectix;
|
|
|
unsigned int bfd_section_index;
|
|
|
asection *section;
|
|
|
|
|
|
bfd_seek (dll, (file_ptr) secptr1 + 0, SEEK_SET);
|
|
|
bfd_bread (sec_name, (bfd_size_type) SCNNMLEN, dll);
|
|
|
sec_name[SCNNMLEN] = '\0';
|
|
|
|
|
|
sectix = read_pe_section_index (sec_name);
|
|
|
section = bfd_get_section_by_name (dll, sec_name);
|
|
|
if (section)
|
|
|
bfd_section_index = section->index;
|
|
|
else
|
|
|
bfd_section_index = -1;
|
|
|
|
|
|
if (sectix != PE_SECTION_INDEX_INVALID)
|
|
|
{
|
|
|
section_data[sectix].rva_start = vaddr;
|
|
|
section_data[sectix].rva_end = vaddr + vsize;
|
|
|
section_data[sectix].index = bfd_section_index;
|
|
|
}
|
|
|
else
|
|
|
{
|
|
|
section_data.resize (otherix + 1);
|
|
|
section_data[otherix].section_name = sec_name;
|
|
|
section_data[otherix].rva_start = vaddr;
|
|
|
section_data[otherix].rva_end = vaddr + vsize;
|
|
|
section_data[otherix].vma_offset = 0;
|
|
|
section_data[otherix].index = bfd_section_index;
|
|
|
if (characteristics & IMAGE_SCN_CNT_CODE)
|
|
|
section_data[otherix].ms_type = mst_text;
|
|
|
else if (characteristics & IMAGE_SCN_CNT_INITIALIZED_DATA)
|
|
|
section_data[otherix].ms_type = mst_data;
|
|
|
else if (characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA)
|
|
|
section_data[otherix].ms_type = mst_bss;
|
|
|
else
|
|
|
section_data[otherix].ms_type = mst_unknown;
|
|
|
otherix++;
|
|
|
}
|
|
|
}
|
|
|
|
|
|
gdb::def_vector<unsigned char> expdata_storage (export_size);
|
|
|
expdata = expdata_storage.data ();
|
|
|
|
|
|
bfd_seek (dll, (file_ptr) expptr, SEEK_SET);
|
|
|
bfd_bread (expdata, (bfd_size_type) export_size, dll);
|
|
|
erva = expdata - export_rva;
|
|
|
|
|
|
nexp = pe_as32 (expdata + 24);
|
|
|
name_rvas = pe_as32 (expdata + 32);
|
|
|
ordinals = pe_as32 (expdata + 36);
|
|
|
ordbase = pe_as32 (expdata + 16);
|
|
|
exp_funcbase = pe_as32 (expdata + 28);
|
|
|
|
|
|
/* Use internal dll name instead of full pathname. */
|
|
|
char *dll_name = (char *) (pe_as32 (expdata + 12) + erva);
|
|
|
|
|
|
for (asection *sectp : gdb_bfd_sections (dll))
|
|
|
{
|
|
|
int sectix = get_pe_section_index (sectp->name, section_data);
|
|
|
if (sectix != PE_SECTION_INDEX_INVALID)
|
|
|
{
|
|
|
/* Data within the section start at rva_start in the pe and at
|
|
|
bfd_get_section_vma() within memory. Store the offset. */
|
|
|
section_data[sectix].vma_offset
|
|
|
= bfd_section_vma (sectp) - section_data[sectix].rva_start;
|
|
|
}
|
|
|
}
|
|
|
|
|
|
/* Truncate name at first dot. Should maybe also convert to all
|
|
|
lower case for convenience on Windows. */
|
|
|
read_pe_truncate_name (dll_name);
|
|
|
|
|
|
if (debug_coff_pe_read)
|
|
|
gdb_printf (gdb_stdlog, _("DLL \"%s\" has %ld export entries,"
|
|
|
" base=%ld\n"), dll_name, nexp, ordbase);
|
|
|
nbforward = 0;
|
|
|
nbnormal = 0;
|
|
|
/* Iterate through the list of symbols. */
|
|
|
for (i = 0; i < nexp; i++)
|
|
|
{
|
|
|
/* Pointer to the names vector. */
|
|
|
unsigned long name_rva = pe_as32 (erva + name_rvas + i * 4);
|
|
|
/* Retrieve ordinal value. */
|
|
|
|
|
|
unsigned long ordinal = pe_as16 (erva + ordinals + i * 2);
|
|
|
|
|
|
|
|
|
/* Pointer to the function address vector. */
|
|
|
/* This is relative to ordinal value. */
|
|
|
unsigned long func_rva = pe_as32 (erva + exp_funcbase +
|
|
|
ordinal * 4);
|
|
|
|
|
|
/* Find this symbol's section in our own array. */
|
|
|
int sectix = 0;
|
|
|
int section_found = 0;
|
|
|
|
|
|
/* First handle forward cases. */
|
|
|
if (func_rva >= export_rva && func_rva < export_rva + export_size)
|
|
|
{
|
|
|
const char *forward_name = (const char *) (erva + func_rva);
|
|
|
const char *funcname = (const char *) (erva + name_rva);
|
|
|
const char *forward_dll_name = forward_name;
|
|
|
const char *forward_func_name = forward_name;
|
|
|
const char *sep = strrchr (forward_name, '.');
|
|
|
|
|
|
std::string name_storage;
|
|
|
if (sep != nullptr)
|
|
|
{
|
|
|
int len = (int) (sep - forward_name);
|
|
|
|
|
|
name_storage = std::string (forward_name, len);
|
|
|
forward_dll_name = name_storage.c_str ();
|
|
|
forward_func_name = sep + 1;
|
|
|
}
|
|
|
if (add_pe_forwarded_sym (reader, funcname, forward_dll_name,
|
|
|
forward_func_name, ordinal,
|
|
|
dll_name, objfile) != 0)
|
|
|
++nbforward;
|
|
|
continue;
|
|
|
}
|
|
|
|
|
|
for (sectix = 0; sectix < otherix; ++sectix)
|
|
|
{
|
|
|
if ((func_rva >= section_data[sectix].rva_start)
|
|
|
&& (func_rva < section_data[sectix].rva_end))
|
|
|
{
|
|
|
const char *sym_name = (const char *) (erva + name_rva);
|
|
|
|
|
|
section_found = 1;
|
|
|
add_pe_exported_sym (reader, sym_name, func_rva, ordinal,
|
|
|
§ion_data[sectix], dll_name, objfile);
|
|
|
++nbnormal;
|
|
|
break;
|
|
|
}
|
|
|
}
|
|
|
if (!section_found)
|
|
|
{
|
|
|
const char *funcname = (const char *) (erva + name_rva);
|
|
|
|
|
|
if (name_rva == 0)
|
|
|
{
|
|
|
add_pe_exported_sym (reader, NULL, func_rva, ordinal,
|
|
|
§ion_data[0], dll_name, objfile);
|
|
|
++nbnormal;
|
|
|
}
|
|
|
else if (debug_coff_pe_read)
|
|
|
gdb_printf (gdb_stdlog, _("Export name \"%s\" ord. %lu,"
|
|
|
" RVA 0x%lx in dll \"%s\" not handled\n"),
|
|
|
funcname, ordinal, func_rva, dll_name);
|
|
|
}
|
|
|
}
|
|
|
|
|
|
if (debug_coff_pe_read)
|
|
|
gdb_printf (gdb_stdlog, _("Finished reading \"%s\", exports %ld,"
|
|
|
" forwards %ld, total %ld/%ld.\n"), dll_name, nbnormal,
|
|
|
nbforward, nbnormal + nbforward, nexp);
|
|
|
}
|
|
|
|
|
|
/* Extract from ABFD the offset of the .text section.
|
|
|
This offset is mainly related to the offset within the file.
|
|
|
The value was previously expected to be 0x1000 for all files,
|
|
|
but some Windows OS core DLLs seem to use 0x10000 section alignment
|
|
|
which modified the return value of that function.
|
|
|
Still return default 0x1000 value if ABFD is NULL or
|
|
|
if '.text' section is not found, but that should not happen... */
|
|
|
|
|
|
#define DEFAULT_COFF_PE_TEXT_SECTION_OFFSET 0x1000
|
|
|
|
|
|
CORE_ADDR
|
|
|
pe_text_section_offset (struct bfd *abfd)
|
|
|
|
|
|
{
|
|
|
unsigned long pe_header_offset, i;
|
|
|
unsigned long nsections, secptr;
|
|
|
int is_pe64 = 0;
|
|
|
int is_pe32 = 0;
|
|
|
char const *target;
|
|
|
|
|
|
if (!abfd)
|
|
|
return DEFAULT_COFF_PE_TEXT_SECTION_OFFSET;
|
|
|
|
|
|
target = bfd_get_target (abfd);
|
|
|
|
|
|
is_pe64 = (strcmp (target, "pe-x86-64") == 0
|
|
|
|| strcmp (target, "pei-x86-64") == 0);
|
|
|
is_pe32 = (strcmp (target, "pe-i386") == 0
|
|
|
|| strcmp (target, "pei-i386") == 0
|
|
|
|| strcmp (target, "pe-arm-wince-little") == 0
|
|
|
|| strcmp (target, "pei-arm-wince-little") == 0);
|
|
|
|
|
|
if (!is_pe32 && !is_pe64)
|
|
|
{
|
|
|
/* This is not a recognized PE format file. Abort now, because
|
|
|
the code is untested on anything else. *FIXME* test on
|
|
|
further architectures and loosen or remove this test. */
|
|
|
return DEFAULT_COFF_PE_TEXT_SECTION_OFFSET;
|
|
|
}
|
|
|
|
|
|
/* Get pe_header, optional header and numbers of sections. */
|
|
|
pe_header_offset = pe_get32 (abfd, 0x3c);
|
|
|
nsections = pe_get16 (abfd, pe_header_offset + 4 + 2);
|
|
|
secptr = (pe_header_offset + 4 + 20 +
|
|
|
pe_get16 (abfd, pe_header_offset + 4 + 16));
|
|
|
|
|
|
/* Get the rva and size of the export section. */
|
|
|
for (i = 0; i < nsections; i++)
|
|
|
{
|
|
|
char sname[SCNNMLEN + 1];
|
|
|
unsigned long secptr1 = secptr + 40 * i;
|
|
|
unsigned long vaddr = pe_get32 (abfd, secptr1 + 12);
|
|
|
|
|
|
bfd_seek (abfd, (file_ptr) secptr1, SEEK_SET);
|
|
|
bfd_bread (sname, (bfd_size_type) SCNNMLEN, abfd);
|
|
|
sname[SCNNMLEN] = '\0';
|
|
|
if (strcmp (sname, ".text") == 0)
|
|
|
return vaddr;
|
|
|
}
|
|
|
|
|
|
return DEFAULT_COFF_PE_TEXT_SECTION_OFFSET;
|
|
|
}
|
|
|
|
|
|
/* Implements "show debug coff_pe_read" command. */
|
|
|
|
|
|
static void
|
|
|
show_debug_coff_pe_read (struct ui_file *file, int from_tty,
|
|
|
struct cmd_list_element *c, const char *value)
|
|
|
{
|
|
|
gdb_printf (file, _("Coff PE read debugging is %s.\n"), value);
|
|
|
}
|
|
|
|
|
|
/* Adds "Set/show debug coff_pe_read" commands. */
|
|
|
|
|
|
void _initialize_coff_pe_read ();
|
|
|
void
|
|
|
_initialize_coff_pe_read ()
|
|
|
{
|
|
|
add_setshow_zuinteger_cmd ("coff-pe-read", class_maintenance,
|
|
|
&debug_coff_pe_read,
|
|
|
_("Set coff PE read debugging."),
|
|
|
_("Show coff PE read debugging."),
|
|
|
_("When set, debugging messages for coff reading "
|
|
|
"of exported symbols are displayed."),
|
|
|
NULL, show_debug_coff_pe_read,
|
|
|
&setdebuglist, &showdebuglist);
|
|
|
}
|