RE: process stack question

[Perez-Gonzalez, Inaky]

> From: Robert Schweikert [mailto:[e-mail]]
> 
> My thinking is that I should be able to get a hold of the process call
> stack and using the top of the stack I should have the name of the
> function/method I am in.

What about something like getting the value of the EIP at
that point (will require some assembly-fu, most probably) and 
calling the equivalent of:

$ addr2line -f -e my-program ADDR

#define _GNU_SOURCE
#include <stdio.h>

const char *program_name;

void some_function (void)
{
  int cnt = 0;
  unsigned long my_eip;
  char *command;
  
  for (cnt = 0; cnt < 10; cnt++) {
    printf ("%d ", cnt);
    fflush (stdout);
  }
  printf ("\n");
  asm volatile (
    "    call 2f               \n"
    "2:                        \n"
    "    pop %0                \n"
    : "=r" (my_eip));
  printf ("I am at 0x%lx\n", my_eip);
  asprintf (&command, "addr2line -f -e \"%s\" 0x%lx\n",
	    program_name, my_eip);
  system (command);
}

int main (int argc, char **argv) 
{
  program_name = argv[0];
  some_function();
  return 0;
}

Not the most elegant solution, but gives an idea. Surely you
can call the equivalent of addr2line by linking into libbfd.
YMMV.

Iñaky Pérez-González -- Not speaking for Intel -- all opinions are my own
(and my fault)