ppvm1-1:/tmp/pp> ls
./	bopop.c     example2*	example3-2*   pwck_exp*   testsc*
../	example1*   example2.c	example3-2.c  pwck_exp.c  testsc.c
bopop*	example1.c  example3*	example3.c    readme

ppvm1-1:/tmp/pp> gdb example2

GNU gdb Red Hat Linux (5.1.90CVS-5)
Copyright 2002 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i386-redhat-linux"...
(gdb) list 1,20
1	void function(char *str) {
2	   char buffer[16];
3	
4	   strcpy(buffer,str);
5	}
6	
7	void main() {
8	  char large_string[256];
9	  int i;
10	
11	  for( i = 0; i < 255; i++)
12	    large_string[i] = 'A';
13	
14	  function(large_string);
15	}
(gdb) diasass main
Dump of assembler code for function main:
0x80481b8 <main>:	push   %ebp
0x80481b9 <main+1>:	mov    %esp,%ebp
0x80481bb <main+3>:	sub    $0x104,%esp
0x80481c1 <main+9>:	nop    
0x80481c2 <main+10>:	movl   $0x0,0xfffffefc(%ebp)
0x80481cc <main+20>:	lea    0x0(%esi,1),%esi
0x80481d0 <main+24>:	cmpl   $0xfe,0xfffffefc(%ebp)
0x80481da <main+34>:	jle    0x80481e0 <main+40>
0x80481dc <main+36>:	jmp    0x80481f8 <main+64>
0x80481de <main+38>:	mov    %esi,%esi
0x80481e0 <main+40>:	lea    0xffffff00(%ebp),%eax
0x80481e6 <main+46>:	mov    0xfffffefc(%ebp),%edx
0x80481ec <main+52>:	movb   $0x41,(%edx,%eax,1)
0x80481f0 <main+56>:	incl   0xfffffefc(%ebp)
0x80481f6 <main+62>:	jmp    0x80481d0 <main+24>
0x80481f8 <main+64>:	lea    0xffffff00(%ebp),%eax
0x80481fe <main+70>:	push   %eax
0x80481ff <main+71>:	call   0x80481a0 <function>
0x8048204 <main+76>:	add    $0x4,%esp
0x8048207 <main+79>:	leave  
0x8048208 <main+80>:	ret    
End of assembler dump.
(gdb) disass function
Dump of assembler code for function function:
0x80481a0 <function>:	push   %ebp
0x80481a1 <function+1>:	mov    %esp,%ebp
0x80481a3 <function+3>:	sub    $0x10,%esp
0x80481a6 <function+6>:	mov    0x8(%ebp),%eax
0x80481a9 <function+9>:	push   %eax
0x80481aa <function+10>:	lea    0xfffffff0(%ebp),%eax
0x80481ad <function+13>:	push   %eax
0x80481ae <function+14>:	call   0x804cf10 <strcpy>
0x80481b3 <function+19>:	add    $0x8,%esp
0x80481b6 <function+22>:	leave  
0x80481b7 <function+23>:	ret    
End of assembler dump.
(gdb) break *0x80481ae
Breakpoint 1 at 0x80481ae: file example2.c, line 4.
(gdb) break *0x80481b3
Breakpoint 2 at 0x80481b3: file example2.c, line 4.
(gdb) info break
Num Type           Disp Enb Address    What
1   breakpoint     keep y   0x080481ae in function at example2.c:4
2   breakpoint     keep y   0x080481b3 in function at example2.c:4
(gdb) run
Starting program: /tmp/pp/example2 

Breakpoint 1, 0x080481ae in function (
    str=0xbffff9b8 'A' <repeats 200 times>...) at example2.c:4
4	   strcpy(buffer,str);
(gdb) info reg eip esp ebp
eip            0x80481ae	0x80481ae
esp            0xbffff990	0xbffff990
ebp            0xbffff9a8	0xbffff9a8
(gdb) x/32 0xbffff990
0xbffff990:	0xbffff998	0xbffff9b8	0x00000000	0x00000000
0xbffff9a0:	0x00000ed8	0x0807a068	0xbffffab8	0x08048204
0xbffff9b0:	0xbffff9b8	0x000000ff	0x41414141	0x41414141
0xbffff9c0:	0x41414141	0x41414141	0x41414141	0x41414141
0xbffff9d0:	0x41414141	0x41414141	0x41414141	0x41414141
0xbffff9e0:	0x41414141	0x41414141	0x41414141	0x41414141
0xbffff9f0:	0x41414141	0x41414141	0x41414141	0x41414141
0xbffffa00:	0x41414141	0x41414141	0x41414141	0x41414141
(gdb) disass main
Dump of assembler code for function main:
0x80481b8 <main>:	push   %ebp
0x80481b9 <main+1>:	mov    %esp,%ebp
0x80481bb <main+3>:	sub    $0x104,%esp
0x80481c1 <main+9>:	nop    
0x80481c2 <main+10>:	movl   $0x0,0xfffffefc(%ebp)
0x80481cc <main+20>:	lea    0x0(%esi,1),%esi
0x80481d0 <main+24>:	cmpl   $0xfe,0xfffffefc(%ebp)
0x80481da <main+34>:	jle    0x80481e0 <main+40>
0x80481dc <main+36>:	jmp    0x80481f8 <main+64>
0x80481de <main+38>:	mov    %esi,%esi
0x80481e0 <main+40>:	lea    0xffffff00(%ebp),%eax
0x80481e6 <main+46>:	mov    0xfffffefc(%ebp),%edx
0x80481ec <main+52>:	movb   $0x41,(%edx,%eax,1)
0x80481f0 <main+56>:	incl   0xfffffefc(%ebp)
0x80481f6 <main+62>:	jmp    0x80481d0 <main+24>
0x80481f8 <main+64>:	lea    0xffffff00(%ebp),%eax
0x80481fe <main+70>:	push   %eax
0x80481ff <main+71>:	call   0x80481a0 <function>
0x8048204 <main+76>:	add    $0x4,%esp
0x8048207 <main+79>:	leave  
0x8048208 <main+80>:	ret    
End of assembler dump.
(gdb) x/32 0xbffff990
0xbffff990:	0xbffff998	0xbffff9b8	0x00000000	0x00000000
0xbffff9a0:	0x00000ed8	0x0807a068	0xbffffab8	0x08048204
0xbffff9b0:	0xbffff9b8	0x000000ff	0x41414141	0x41414141
0xbffff9c0:	0x41414141	0x41414141	0x41414141	0x41414141
0xbffff9d0:	0x41414141	0x41414141	0x41414141	0x41414141
0xbffff9e0:	0x41414141	0x41414141	0x41414141	0x41414141
0xbffff9f0:	0x41414141	0x41414141	0x41414141	0x41414141
0xbffffa00:	0x41414141	0x41414141	0x41414141	0x41414141
(gdb) cont
Continuing.

Breakpoint 2, 0x080481b3 in function (
    str=0x41414141 <Address 0x41414141 out of bounds>) at example2.c:4
4	   strcpy(buffer,str);
(gdb) info reg eip esp ebp
eip            0x80481b3	0x80481b3
esp            0xbffff990	0xbffff990
ebp            0xbffff9a8	0xbffff9a8
(gdb) x/32 0xbffff990
0xbffff990:	0xbffff998	0xbffff9b8	0x41414141	0x41414141
0xbffff9a0:	0x41414141	0x41414141	0x41414141	0x41414141
0xbffff9b0:	0x41414141	0x41414141	0x41414141	0x41414141
0xbffff9c0:	0x41414141	0x41414141	0x41414141	0x41414141
0xbffff9d0:	0x41414141	0x41414141	0x41414141	0x41414141
0xbffff9e0:	0x41414141	0x41414141	0x41414141	0x41414141
0xbffff9f0:	0x41414141	0x41414141	0x41414141	0x41414141
0xbffffa00:	0x41414141	0x41414141	0x41414141	0x41414141
(gdb) cont
Continuing.

Program received signal SIGSEGV, Segmentation fault.
0x41414141 in ?? ()
(gdb) quit
The program is running.  Exit anyway? (y or n) y
ppvm1-1:/tmp/pp> exit