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/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 1999-2016. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* %CopyrightEnd%
*/
/*
** This mini tool fixes an incompatibility between
** Microsoft's tools, who dont like the virtual size being put in
** the physical address field, but rely on the raw size field for
** sizing the ".bss" section.
** This fixes some of the problems with linking gcc compiled objects
** together with MSVC dito.
**
** Courtesy DJ Delorie for describing the COFF file format on
** http://www.delorie.com/djgpp/doc/coff/
** The coff structures are fetched from Microsofts headers though.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <windows.h>
#include <winnt.h> /* Structure definitions for PE (COFF) */
static int dump_edit(char *filename, int edit);
static int v_printf(char *format, ...);
char *progname;
int verbouse = 0;
int main(int argc, char **argv)
{
int findex = 1;
int edit = 0;
int ret;
progname = argv[0];
if (argc == 1) {
fprintf(stderr,"Format : %s [-e] [-v] <filename>\n", progname);
return 1;
}
for (findex = 1;
findex < argc && (*argv[findex] == '-' || *argv[findex] == '/');
++findex)
switch (argv[findex][1]) {
case 'e':
case 'E':
edit = 1;
break;
case 'v':
case 'V':
verbouse = 1;
default:
fprintf(stderr, "%s: unknown option %s\n", progname, argv[findex]);
break;
}
if (findex == argc) {
fprintf(stderr,"%s: No filenames given.\n", progname);
return 1;
}
for(; findex < argc; ++findex)
if ((ret = dump_edit(argv[findex],edit)) != 0)
return ret;
return 0;
}
int dump_edit(char *filename, int edit)
{
FILE *f = fopen(filename, (edit) ? "r+b" : "rb");
IMAGE_FILE_HEADER filhdr;
IMAGE_SECTION_HEADER scnhdr;
int i;
if (f == NULL) {
fprintf(stderr, "%s: cannot open %s.\n", progname, filename);
return 1;
}
if (fread(&filhdr, sizeof(filhdr), 1, f) == 0) {
fprintf(stderr,"%s: Could not read COFF header from %s,"
" is this a PE (COFF) file?\n", progname, filename);
fclose(f);
return 1;
}
v_printf("File: %s\n", filename);
v_printf("Magic number: 0x%08x\n", filhdr.Machine);
v_printf("Number of sections: %d\n",filhdr.NumberOfSections);
if (fseek(f, (long) filhdr.SizeOfOptionalHeader, SEEK_CUR) != 0) {
fprintf(stderr,"%s: Could not read COFF optional header from %s,"
" is this a PE (COFF) file?\n", progname, filename);
fclose(f);
return 1;
}
for (i = 0; i < filhdr.NumberOfSections; ++i) {
if (fread(&scnhdr, sizeof(scnhdr), 1, f) == 0) {
fprintf(stderr,"%s: Could not read section header from %s,"
" is this a PE (COFF) file?\n", progname, filename);
fclose(f);
return 1;
}
v_printf("Section %s:\n", scnhdr.Name);
v_printf("Physical address: 0x%08x\n", scnhdr.Misc.PhysicalAddress);
v_printf("Size: 0x%08x\n", scnhdr.SizeOfRawData);
if (scnhdr.Misc.PhysicalAddress != 0 &&
scnhdr.SizeOfRawData == 0) {
printf("Section header %s in file %s will confuse MSC linker, "
"virtual size is 0x%08x and raw size is 0\n",
scnhdr.Name, filename, scnhdr.Misc.PhysicalAddress,
scnhdr.SizeOfRawData);
if (edit) {
scnhdr.SizeOfRawData = scnhdr.Misc.PhysicalAddress;
scnhdr.Misc.PhysicalAddress = 0;
if (fseek(f, (long) -((long)sizeof(scnhdr)), SEEK_CUR) != 0 ||
fwrite(&scnhdr, sizeof(scnhdr), 1, f) == 0) {
fprintf(stderr,"%s: could not edit file %s.\n",
progname, filename);
fclose(f);
return 1;
}
printf("Edited object, virtual size is now 0, and "
"raw size is 0x%08x.\n", scnhdr.SizeOfRawData);
} else {
printf("Specify option '-e' to correct the problem.\n");
}
}
}
fclose(f);
return 0;
}
static int v_printf(char *format, ...)
{
va_list ap;
int ret = 0;
if (verbouse) {
va_start(ap, format);
ret = vfprintf(stdout, format, ap);
va_end(ap);
}
return ret;
}
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