[Ltrace-devel] PIE support

[Petr Machata]

Ian Wienand wrote:
> On Mon, Nov 27, 2006 at 08:31:47PM +0100, Petr Machata wrote:
>> Aha, that's not very surprising.  I dind't touch ia64 yet.  It's on my
>> todo though.
> 
> yeah, I don't see move_breakpoint being called at all.

That's strange, I just took itanium machine to debug the problem, and it 
just works!  Even the testsuite passes.

# cat x.c
#include <stdio.h>
int main(void)
{
         fprintf (stderr, "ahoj %s!%c", "svete", '\n');
         return 0;
}
# gcc x.c -fpie -pie -o x-pie
# gcc x.c -o x-nopie
# file x-pie x-nopie
x-pie:   ELF 64-bit LSB shared object, IA-64, version 1 (SYSV), not stripped
x-nopie: ELF 64-bit LSB executable, IA-64, version 1 (SYSV), for 
GNU/Linux 2.4.0, dynamically linked (uses shared libs), not stripped
# ./ltrace ./x-pie
__libc_start_main(0x2000000800011490, 1, 0x60000fffffffb958, 
0x2000000800011480, 0x2000000800011470 <unfinished ...>
fprintf(0x20000008002ec2c0, 0x2000000800000fa0, 0x2000000800000fb0, 10, 
0ahoj svete!
)                     = 12
+++ exited (status 0) +++
# ./ltrace ./x-nopie
__libc_start_main(0x4000000000000a50, 1, 0x60000fffffffb958, 
0x4000000000000a40, 0x4000000000000a30 <unfinished ...>
fprintf(0x20000000002d82c0, 0x4000000000000a00, 0x4000000000000a10, 10, 
0ahoj svete!
)                     = 12
+++ exited (status 0) +++

No idea what went wrong at your site.  Could you send along copy of 
ltrace -ddd log?  And what distro is installed there?  I was testing it 
on RHEL-4, but new versions of toolchain tend to add interesting twists 
to once working programs...

> 
> -i

PM