// compile: cc filename.c -lbfd -liberty
// Type `info bfd' on your GNU/Linux system to
// read more about the BFD library.
#include <bfd.h>
#include <stdlib.h>
#include <assert.h>
#include <stdio.h>

//argv[1] should be name of an object file
main(int argc, char *argv[])
{
    long storage_needed, num_symbols, i;
    asymbol **symbol_table;
    bfd *abfd;
    char filename[100];
    
    bfd_init(); // magic
    
    abfd = bfd_openr(argv[1], NULL);
    assert(abfd != NULL);
    bfd_check_format(abfd, bfd_object);
    storage_needed = bfd_get_symtab_upper_bound(abfd);
    assert(storage_needed >= 0);
    printf("storage = %d\n", storage_needed);

    symbol_table = (asymbol**)malloc(storage_needed);
    assert(symbol_table != 0);
    num_symbols = bfd_canonicalize_symtab(abfd, symbol_table);
    assert(num_symbols >= 0);
    printf("num syms = %d\n", num_symbols);
    for(i = 0; i < num_symbols; i++)
        printf("%s: %x\n", bfd_asymbol_name(symbol_table[i]), 
            bfd_asymbol_value(symbol_table[i]));
    
}