diff options
Diffstat (limited to 'erts/etc/win32/cygwin_tools/mingw/coffix.c')
| -rw-r--r-- | erts/etc/win32/cygwin_tools/mingw/coffix.c | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/erts/etc/win32/cygwin_tools/mingw/coffix.c b/erts/etc/win32/cygwin_tools/mingw/coffix.c new file mode 100644 index 0000000000..5dff030a69 --- /dev/null +++ b/erts/etc/win32/cygwin_tools/mingw/coffix.c @@ -0,0 +1,161 @@ +/* + * %CopyrightBegin% + * + * Copyright Ericsson AB 2006-2009. All Rights Reserved. + * + * The contents of this file are subject to the Erlang Public License, + * Version 1.1, (the "License"); you may not use this file except in + * compliance with the License. You should have received a copy of the + * Erlang Public License along with this software. If not, it can be + * retrieved online at http://www.erlang.org/. + * + * Software distributed under the License is distributed on an "AS IS" + * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See + * the License for the specific language governing rights 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; +} + |