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* [Bug target/63228] New: -m16 doesn't work if gcc is compiled for x32
@ 2014-09-11 18:25 mikulas at artax dot karlin.mff.cuni.cz
2014-09-11 19:53 ` [Bug target/63228] " hjl.tools at gmail dot com
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: mikulas at artax dot karlin.mff.cuni.cz @ 2014-09-11 18:25 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63228
Bug ID: 63228
Summary: -m16 doesn't work if gcc is compiled for x32
Product: gcc
Version: 4.9.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: mikulas at artax dot karlin.mff.cuni.cz
Host: x86_64-linux-gnux32
Target: x86_64-linux-gnux32
Build: x86_64-linux-gnux32
When gcc is configured and compiled for x32 mode (x86_64-linux-gnux32 triplet),
the flag -m16 doesn't work. The bug was reproduced on gcc-4.9.1-13 from Debian
Ports x32 distribution (https://wiki.debian.org/X32Port)
Attempting to compile or assemble anything with "gcc -m16 -march=i386" results
in this error message:
error: CPU you selected does not support x86-64 instruction set
(this error causes linux kernel 3.16.2 compilation failure)
If you remove "-march=i386", the file is compiled, but it can't be assembled,
because gcc generates incorrect assembler as if it was x86_64 target. For
example, compiling a file test.c containing "int bla(void) { return 3; }" with
"gcc -c -m16 test.c", results in these error messages:
/tmp/cc89iTZG.s: Assembler messages:
/tmp/cc89iTZG.s:9: Error: bad register name `%rbp'
/tmp/cc89iTZG.s:15: Error: bad register name `%rbp'
When gcc is configured for x86_64 mode (x86_64-unknown-linux-gnu), -m16 works
correctly.
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug target/63228] -m16 doesn't work if gcc is compiled for x32
2014-09-11 18:25 [Bug target/63228] New: -m16 doesn't work if gcc is compiled for x32 mikulas at artax dot karlin.mff.cuni.cz
@ 2014-09-11 19:53 ` hjl.tools at gmail dot com
2014-09-11 22:18 ` hjl at gcc dot gnu.org
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: hjl.tools at gmail dot com @ 2014-09-11 19:53 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63228
H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2014-09-11
CC| |hjl.tools at gmail dot com
Target Milestone|--- |4.9.2
Ever confirmed|0 |1
--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
A patch is posted at
https://gcc.gnu.org/ml/gcc-patches/2014-09/msg00987.html
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug target/63228] -m16 doesn't work if gcc is compiled for x32
2014-09-11 18:25 [Bug target/63228] New: -m16 doesn't work if gcc is compiled for x32 mikulas at artax dot karlin.mff.cuni.cz
2014-09-11 19:53 ` [Bug target/63228] " hjl.tools at gmail dot com
@ 2014-09-11 22:18 ` hjl at gcc dot gnu.org
2014-09-11 22:28 ` hjl at gcc dot gnu.org
2014-09-11 22:29 ` hjl.tools at gmail dot com
3 siblings, 0 replies; 5+ messages in thread
From: hjl at gcc dot gnu.org @ 2014-09-11 22:18 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63228
--- Comment #2 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Thu Sep 11 22:18:06 2014
New Revision: 215194
URL: https://gcc.gnu.org/viewcvs?rev=215194&root=gcc&view=rev
Log:
Also turn off OPTION_MASK_ABI_X32 for -m16
PR target/63228
* config/i386/i386.c (ix86_option_override_internal): Also turn
off OPTION_MASK_ABI_X32 for -m16.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.c
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug target/63228] -m16 doesn't work if gcc is compiled for x32
2014-09-11 18:25 [Bug target/63228] New: -m16 doesn't work if gcc is compiled for x32 mikulas at artax dot karlin.mff.cuni.cz
2014-09-11 19:53 ` [Bug target/63228] " hjl.tools at gmail dot com
2014-09-11 22:18 ` hjl at gcc dot gnu.org
@ 2014-09-11 22:28 ` hjl at gcc dot gnu.org
2014-09-11 22:29 ` hjl.tools at gmail dot com
3 siblings, 0 replies; 5+ messages in thread
From: hjl at gcc dot gnu.org @ 2014-09-11 22:28 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63228
--- Comment #3 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Thu Sep 11 22:28:16 2014
New Revision: 215195
URL: https://gcc.gnu.org/viewcvs?rev=215195&root=gcc&view=rev
Log:
Also turn off OPTION_MASK_ABI_X32 for -m16
Backport from mainline
PR target/63228
* config/i386/i386.c (ix86_option_override_internal): Also turn
off OPTION_MASK_ABI_X32 for -m16.
Modified:
branches/gcc-4_9-branch/gcc/ChangeLog
branches/gcc-4_9-branch/gcc/config/i386/i386.c
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug target/63228] -m16 doesn't work if gcc is compiled for x32
2014-09-11 18:25 [Bug target/63228] New: -m16 doesn't work if gcc is compiled for x32 mikulas at artax dot karlin.mff.cuni.cz
` (2 preceding siblings ...)
2014-09-11 22:28 ` hjl at gcc dot gnu.org
@ 2014-09-11 22:29 ` hjl.tools at gmail dot com
3 siblings, 0 replies; 5+ messages in thread
From: hjl.tools at gmail dot com @ 2014-09-11 22:29 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63228
H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from H.J. Lu <hjl.tools at gmail dot com> ---
Fixed.
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2014-09-11 22:29 UTC | newest]
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2014-09-11 18:25 [Bug target/63228] New: -m16 doesn't work if gcc is compiled for x32 mikulas at artax dot karlin.mff.cuni.cz
2014-09-11 19:53 ` [Bug target/63228] " hjl.tools at gmail dot com
2014-09-11 22:18 ` hjl at gcc dot gnu.org
2014-09-11 22:28 ` hjl at gcc dot gnu.org
2014-09-11 22:29 ` hjl.tools at gmail dot com
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