This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / scripts / modsign / mod-extract.c

diff --git a/scripts/modsign/mod-extract.c b/scripts/modsign/mod-extract.c
new file mode 100644 (file)
index 0000000..f8502e7
--- /dev/null
+++ b/scripts/modsign/mod-extract.c
@@ -0,0 +1,109 @@
+
+
+
+#include <errno.h>
+#include <error.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <bfd.h>
+
+/* This should be set in a Makefile somehow */
+#define TARGET "i686-pc-linux-gnu"
+
+static FILE *out;
+
+static void dump_data(bfd *abfd)
+{
+       asection *section;
+       bfd_byte *data = 0;
+       bfd_size_type size;
+       bfd_size_type addr_offset;
+       bfd_size_type stop_offset;
+       unsigned int opb = bfd_octets_per_byte(abfd);
+       unsigned int cksum;
+
+       for (section = abfd->sections; section != NULL; section = section->next) {
+               if (section->flags & SEC_HAS_CONTENTS) {
+                       if (bfd_section_size(abfd, section) == 0)
+                               continue;
+
+                       /* We only care about sections with "text" or "data" in their names */
+                       if ((strstr(section->name, "text") == NULL) &&
+                           (strstr(section->name, "data") == NULL))
+                               continue;
+
+                       cksum = 0;
+
+                       size = bfd_section_size(abfd, section) / opb;
+
+                       printf("Contents of section %s size %lu", section->name, size);
+
+                       data = (bfd_byte *) malloc(size);
+
+                       bfd_get_section_contents(abfd, section, (PTR) data, 0, size);
+
+                       stop_offset = size;
+
+                       printf(" idata %02x%02x%02x%02x", data[0], data[1], data[2], data[3]);
+
+                       for (addr_offset = 0; addr_offset < stop_offset; ++addr_offset) {
+                               cksum += (unsigned int) data[addr_offset];
+                               fputc(data[addr_offset], out);
+                       }
+                       free (data);
+
+                       printf(" checksum %08x\n", cksum);
+               }
+       }
+}
+
+void set_default_bfd_target(void)
+{
+       const char *target = TARGET;
+
+       if (!bfd_set_default_target(target))
+               fprintf(stderr, "can't set BFD default target to `%s': %s", target, bfd_errmsg (bfd_get_error ()));
+}
+
+int main (int argc, char *argv[])
+{
+       char *in_file;
+       char *out_file;
+       bfd *file;
+       char **matching;
+
+       if (argc != 3) {
+               fprintf(stderr, "%s [infile] [outfile]\n", argv[0]);
+               exit(1);
+       }
+
+       in_file = argv[1];
+       out_file = argv[2];
+
+       bfd_init();
+       set_default_bfd_target();
+
+
+//     file = bfd_openr(in_file, "elf32-i386");
+       file = bfd_openr(in_file, NULL);
+       if (file == NULL) {
+               fprintf(stderr, "error \"%s\" trying to open %s\n", strerror(errno), in_file);
+               exit(1);
+       }
+
+       out = fopen(out_file, "w");
+       if (out == NULL) {
+               fprintf(stderr, "error \"%s\" trying to create %s\n", strerror(errno), out_file);
+               exit(1);
+       }
+
+       if (bfd_check_format_matches(file, bfd_object, &matching)) {
+               dump_data (file);
+       }
+
+       fclose(out);
+
+       return 0;
+}