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-rw-r--r--erts/etc/win32/cygwin_tools/vc/coffix.c161
1 files changed, 161 insertions, 0 deletions
diff --git a/erts/etc/win32/cygwin_tools/vc/coffix.c b/erts/etc/win32/cygwin_tools/vc/coffix.c
new file mode 100644
index 0000000000..dee0132a61
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+++ b/erts/etc/win32/cygwin_tools/vc/coffix.c
@@ -0,0 +1,161 @@
+/*
+ * %CopyrightBegin%
+ *
+ * Copyright Ericsson AB 1999-2009. 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;
+}
+