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https://github.com/torvalds/linux
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214a88768d
Improve the debuggability of relocations output. When trying to compare the output between different linkers, it's handy to be able to see the section names in output. Signed-off-by: Michael Davidson <md@google.com> Link: http://lkml.kernel.org/r/20140121203223.GA12649@www.outflux.net Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
84 lines
1.7 KiB
C
84 lines
1.7 KiB
C
#include "relocs.h"
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void die(char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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vfprintf(stderr, fmt, ap);
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va_end(ap);
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exit(1);
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}
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static void usage(void)
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{
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die("relocs [--abs-syms|--abs-relocs|--reloc-info|--text|--realmode]" \
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" vmlinux\n");
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}
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int main(int argc, char **argv)
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{
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int show_absolute_syms, show_absolute_relocs, show_reloc_info;
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int as_text, use_real_mode;
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const char *fname;
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FILE *fp;
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int i;
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unsigned char e_ident[EI_NIDENT];
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show_absolute_syms = 0;
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show_absolute_relocs = 0;
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show_reloc_info = 0;
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as_text = 0;
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use_real_mode = 0;
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fname = NULL;
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for (i = 1; i < argc; i++) {
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char *arg = argv[i];
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if (*arg == '-') {
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if (strcmp(arg, "--abs-syms") == 0) {
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show_absolute_syms = 1;
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continue;
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}
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if (strcmp(arg, "--abs-relocs") == 0) {
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show_absolute_relocs = 1;
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continue;
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}
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if (strcmp(arg, "--reloc-info") == 0) {
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show_reloc_info = 1;
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continue;
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}
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if (strcmp(arg, "--text") == 0) {
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as_text = 1;
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continue;
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}
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if (strcmp(arg, "--realmode") == 0) {
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use_real_mode = 1;
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continue;
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}
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}
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else if (!fname) {
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fname = arg;
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continue;
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}
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usage();
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}
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if (!fname) {
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usage();
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}
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fp = fopen(fname, "r");
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if (!fp) {
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die("Cannot open %s: %s\n", fname, strerror(errno));
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}
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if (fread(&e_ident, 1, EI_NIDENT, fp) != EI_NIDENT) {
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die("Cannot read %s: %s", fname, strerror(errno));
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}
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rewind(fp);
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if (e_ident[EI_CLASS] == ELFCLASS64)
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process_64(fp, use_real_mode, as_text,
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show_absolute_syms, show_absolute_relocs,
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show_reloc_info);
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else
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process_32(fp, use_real_mode, as_text,
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show_absolute_syms, show_absolute_relocs,
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show_reloc_info);
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fclose(fp);
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return 0;
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}
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