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* [Bug lto/49703] New: -flto makes stack executable by default
@ 2011-07-11 11:59 marcus at jet dot franken.de
2011-07-11 12:08 ` [Bug lto/49703] " rguenth at gcc dot gnu.org
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: marcus at jet dot franken.de @ 2011-07-11 11:59 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49703
Summary: -flto makes stack executable by default
Product: gcc
Version: 4.6.1
Status: UNCONFIRMED
Severity: critical
Priority: P3
Component: lto
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: marcus@jet.franken.de
$ cat xx.c
#include <stdio.h>
int main(int argc, char **argv) {
printf("Hallo\n");
return 0;
}
$ gcc -O2 -o xx xx.c
$ readelf -a xx|grep STACK
GNU_STACK 0x000000 0x00000000 0x00000000 0x00000 0x00000 RW 0x4
$ gcc -flto -O2 -o xx xx.c
$ readelf -a xx|grep STACK
GNU_STACK 0x000000 0x00000000 0x00000000 0x00000 0x00000 RWE 0x4
-flto should not create executable stacks.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug lto/49703] -flto makes stack executable by default
2011-07-11 11:59 [Bug lto/49703] New: -flto makes stack executable by default marcus at jet dot franken.de
@ 2011-07-11 12:08 ` rguenth at gcc dot gnu.org
2011-07-11 12:12 ` marcus at jet dot franken.de
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: rguenth at gcc dot gnu.org @ 2011-07-11 12:08 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49703
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2011.07.11 12:08:34
Ever Confirmed|0 |1
--- Comment #1 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-07-11 12:08:34 UTC ---
Works for me ...
please provide preprocessed source.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug lto/49703] -flto makes stack executable by default
2011-07-11 11:59 [Bug lto/49703] New: -flto makes stack executable by default marcus at jet dot franken.de
2011-07-11 12:08 ` [Bug lto/49703] " rguenth at gcc dot gnu.org
@ 2011-07-11 12:12 ` marcus at jet dot franken.de
2011-07-11 12:14 ` rguenth at gcc dot gnu.org
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: marcus at jet dot franken.de @ 2011-07-11 12:12 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49703
--- Comment #2 from marcus at jet dot franken.de 2011-07-11 12:11:35 UTC ---
Created attachment 24738
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24738
xx.c
gcc -O2 -flto -o xx xx.c
readelf -a xx|grep GNU_STACK
should NOT show "RWE" but only "RW"
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug lto/49703] -flto makes stack executable by default
2011-07-11 11:59 [Bug lto/49703] New: -flto makes stack executable by default marcus at jet dot franken.de
2011-07-11 12:08 ` [Bug lto/49703] " rguenth at gcc dot gnu.org
2011-07-11 12:12 ` marcus at jet dot franken.de
@ 2011-07-11 12:14 ` rguenth at gcc dot gnu.org
2011-07-11 12:31 ` rguenth at gcc dot gnu.org
2011-07-11 18:35 ` [Bug lto/49703] -flto makes stack executable by default with GNU ld linker plugin hjl.tools at gmail dot com
4 siblings, 0 replies; 6+ messages in thread
From: rguenth at gcc dot gnu.org @ 2011-07-11 12:14 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49703
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |UNCONFIRMED
Ever Confirmed|1 |0
--- Comment #3 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-07-11 12:13:57 UTC ---
Works for me.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug lto/49703] -flto makes stack executable by default
2011-07-11 11:59 [Bug lto/49703] New: -flto makes stack executable by default marcus at jet dot franken.de
` (2 preceding siblings ...)
2011-07-11 12:14 ` rguenth at gcc dot gnu.org
@ 2011-07-11 12:31 ` rguenth at gcc dot gnu.org
2011-07-11 18:35 ` [Bug lto/49703] -flto makes stack executable by default with GNU ld linker plugin hjl.tools at gmail dot com
4 siblings, 0 replies; 6+ messages in thread
From: rguenth at gcc dot gnu.org @ 2011-07-11 12:31 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49703
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed|2011-07-11 12:08:34 |2011.07.11 12:31:19
CC| |davek at gcc dot gnu.org
Ever Confirmed|0 |1
--- Comment #4 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-07-11 12:31:19 UTC ---
I can reproduce it at least on {x86_64,ppc}-linux with the linker plugin from
> ld --version
GNU ld (GNU Binutils; openSUSE Factory) 2.21.1
and the GCC 4.6.1 release.
It works without -fuse-linker-plugin, so I suspect a GNU ld bug. It works
with gold. Dave?
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug lto/49703] -flto makes stack executable by default with GNU ld linker plugin
2011-07-11 11:59 [Bug lto/49703] New: -flto makes stack executable by default marcus at jet dot franken.de
` (3 preceding siblings ...)
2011-07-11 12:31 ` rguenth at gcc dot gnu.org
@ 2011-07-11 18:35 ` hjl.tools at gmail dot com
4 siblings, 0 replies; 6+ messages in thread
From: hjl.tools at gmail dot com @ 2011-07-11 18:35 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49703
H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
URL| |http://www.sourceware.org/b
| |ugzilla/show_bug.cgi?id=129
| |82
Resolution| |INVALID
--- Comment #5 from H.J. Lu <hjl.tools at gmail dot com> 2011-07-11 18:35:41 UTC ---
It is a linker bug:
http://www.sourceware.org/bugzilla/show_bug.cgi?id=12982
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2011-07-11 18:35 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2011-07-11 11:59 [Bug lto/49703] New: -flto makes stack executable by default marcus at jet dot franken.de
2011-07-11 12:08 ` [Bug lto/49703] " rguenth at gcc dot gnu.org
2011-07-11 12:12 ` marcus at jet dot franken.de
2011-07-11 12:14 ` rguenth at gcc dot gnu.org
2011-07-11 12:31 ` rguenth at gcc dot gnu.org
2011-07-11 18:35 ` [Bug lto/49703] -flto makes stack executable by default with GNU ld linker plugin hjl.tools at gmail dot com
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