obj_int_extract.c

/*
 *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */


#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "vpx_config.h"
#include "vpx/vpx_integer.h"

typedef enum {
  OUTPUT_FMT_PLAIN,
  OUTPUT_FMT_RVDS,
  OUTPUT_FMT_GAS,
} output_fmt_t;

int log_msg(const char *fmt, ...) {
  int res;
  va_list ap;
  va_start(ap, fmt);
  res = vfprintf(stderr, fmt, ap);
  va_end(ap);
  return res;
}

#if defined(__GNUC__) && __GNUC__
#if defined(__MACH__)

#include <mach-o/loader.h>
#include <mach-o/nlist.h>

int print_macho_equ(output_fmt_t mode, uint8_t* name, int val) {
  switch (mode) {
    case OUTPUT_FMT_RVDS:
      printf("%-40s EQU %5d\n", name, val);
      return 0;
    case  OUTPUT_FMT_GAS:
      printf(".set %-40s, %5d\n", name, val);
      return 0;
    default:
      log_msg("Unsupported mode: %d", mode);
      return 1;
  }
}

int parse_macho(uint8_t *base_buf, size_t sz, output_fmt_t mode) {
  int i, j;
  struct mach_header header;
  uint8_t *buf = base_buf;
  int base_data_section = 0;
  int bits = 0;

  /* We can read in mach_header for 32 and 64 bit architectures
   * because it's identical to mach_header_64 except for the last
   * element (uint32_t reserved), which we don't use. Then, when
   * we know which architecture we're looking at, increment buf
   * appropriately.
   */
  memcpy(&header, buf, sizeof(struct mach_header));

  if (header.magic == MH_MAGIC) {