93 lines
2.4 KiB
C
93 lines
2.4 KiB
C
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/***********************************************************************/
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/* */
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/* Objective Caml */
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/* */
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/* Mehdi Dogguy, PPS laboratory, University Paris Diderot */
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/* */
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/* Copyright 2010 Mehdi Dogguy. Used and distributed as part of */
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/* Objective Caml by permission from the author. This file is */
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/* distributed under the terms of the Q Public License version 1.0. */
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/***********************************************************************/
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#include "../config/s.h"
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#include "../byterun/mlvalues.h"
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#include "../byterun/alloc.h"
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#include <stdio.h>
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#ifdef HAS_LIBBFD
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#include <stdlib.h>
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#include <string.h>
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#include <bfd.h>
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int main(int argc, char ** argv)
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{
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bfd *fd;
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asection *sec;
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file_ptr offset;
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long st_size;
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asymbol ** symbol_table;
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long sym_count, i;
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if (argc != 2) {
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fprintf(stderr, "Usage: objinfo_helper <dynamic library>\n");
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return 2;
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}
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fd = bfd_openr(argv[1], "default");
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if (!fd) {
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fprintf(stderr, "Error opening file %s\n", argv[1]);
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return 2;
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}
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if (! bfd_check_format (fd, bfd_object)) {
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fprintf(stderr, "Error: wrong format\n");
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bfd_close(fd);
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return 2;
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}
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sec = bfd_get_section_by_name(fd, ".data");
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if (! sec) {
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fprintf(stderr, "Error: section .data not found\n");
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bfd_close(fd);
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return 2;
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}
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offset = sec->filepos;
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st_size = bfd_get_dynamic_symtab_upper_bound (fd);
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if (st_size <= 0) {
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fprintf(stderr, "Error: size of section .data unknown\n");
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bfd_close(fd);
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return 2;
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}
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symbol_table = malloc(st_size);
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if (! symbol_table) {
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fprintf(stderr, "Error: out of memory\n");
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bfd_close(fd);
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return 2;
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}
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sym_count = bfd_canonicalize_dynamic_symtab (fd, symbol_table);
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for (i = 0; i < sym_count; i++) {
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if (strcmp(symbol_table[i]->name, "caml_plugin_header") == 0) {
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printf("%ld\n", (long) (offset + symbol_table[i]->value));
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bfd_close(fd);
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return 0;
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}
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}
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fprintf(stderr, "Error: missing symbol caml_plugin_header\n");
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bfd_close(fd);
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return 2;
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}
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#else
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int main(int argc, char ** argv)
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{
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fprintf(stderr, "BFD library unavailable, cannot print info on .cmxs files\n");
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return 2;
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}
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#endif
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