Re: Compile app using the BFD library?

[Brian Blietz <bblietz at iastate dot edu>]

Why does the following give me a seg fault?

It seg faults on bfd_get_symtab_upper_bound(abfd)

print_symbol_table() is modeled after the example in section 2.7 of
the BFDlib manual.

a.out is a simple program compiled with gcc
> gcc hello.c

#include <stdio.h>
#include <stdlib.h>
#include "/home/bblietz/work/binutils-2.14/bfd/bfd.h"

#define FILENAME "/home/bblietz/work/testCode/a.out"
#define TARGET "i686-pc-linux-gnu"

void print_symbol_table(bfd *abfd)
{
   long storage_needed;
   asymbol **symbol_table;
   long number_of_symbols;
   long i;
  
   storage_needed = bfd_get_symtab_upper_bound(abfd);
  
   symbol_table = (asymbol **)xmalloc(storage_needed);
  
   number_of_symbols = bfd_canonicalize_symtab(abfd, symbol_table);
  
   for(i = 0; i < number_of_symbols; i++)
   {
       printf("%s\n", symbol_table[i]->name);
   }
  
}
int main(int argc, char *argv[])
{
   bfd *abfd;
  
   bfd_init();
   bfd_set_default_target (TARGET);
  
   abfd = bfd_openr(FILENAME, NULL);
  
   printf("abfd: 0x%x\n", abfd);
   print_symbol_table(abfd);   
  
}

Daniel Jacobowitz wrote:

> On Fri, Feb 06, 2004 at 06:12:44PM -0600, Brian Blietz wrote:
>  
>
> > I currently have an app that uses the BFD library.
> > I am having troubles building the application.
> >
> > I am using Redhat Fedora, gcc 3.2.3, binutils 2.14
> >
> > Here is my compile line and the errors that follow
> >
> >    
> >
> > > gcc bfd-test.c -lbfd
> > >      
>
> Also use -liberty.
>
>  

--
Brian Blietz
bblietz@iastate.edu

"There are 10 types of people in the world...
Those who understand binary, and those who don't."