Merge "Add way to specify an offset in an elf file."

#include <fcntl.h>

#include <inttypes.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <sys/mman.h>

#include <sys/stat.h>

  }

}

int GetElfInfo(const char* file) {

int GetElfInfo(const char* file, uint64_t offset) {

  // Send all log messages to stdout.

  log_to_stdout(true);

  MemoryFileAtOffset* memory = new MemoryFileAtOffset;

  if (!memory->Init(file, 0)) {

  if (!memory->Init(file, offset)) {

    // Initializatation failed.

    printf("Failed to init\n");

    return 1;

}  // namespace unwindstack

int main(int argc, char** argv) {

  if (argc != 2) {

    printf("Need to pass the name of an elf file to the program.\n");

  if (argc != 2 && argc != 3) {

    printf("Usage: unwind_info ELF_FILE [OFFSET]\n");

    printf("  ELF_FILE\n");

    printf("    The path to an elf file.\n");

    printf("  OFFSET\n");

    printf("    Use the offset into the ELF file as the beginning of the elf.\n");

    return 1;

  }

    return 1;

  }

  return unwindstack::GetElfInfo(argv[1]);

  uint64_t offset = 0;

  if (argc == 3) {

    char* end;

    offset = strtoull(argv[2], &end, 16);

    if (*end != '\0') {

      printf("Malformed OFFSET value: %s\n", argv[2]);

      return 1;

    }

  }

  return unwindstack::GetElfInfo(argv[1], offset);

}