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* [Bug c/66457] New: gcc generates an extra "mov ??, %edx" before "call mcount" when "-pg" is enabled in cross compilation
@ 2015-06-08 9:51 leedypku at gmail dot com
2015-06-08 9:55 ` [Bug target/66457] " pinskia at gcc dot gnu.org
` (5 more replies)
0 siblings, 6 replies; 7+ messages in thread
From: leedypku at gmail dot com @ 2015-06-08 9:51 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66457
Bug ID: 66457
Summary: gcc generates an extra "mov ??, %edx" before "call
mcount" when "-pg" is enabled in cross compilation
Product: gcc
Version: 4.9.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: leedypku at gmail dot com
Target Milestone: ---
# On Darwin, with cross compilation, some code omitted
$ echo 'int main(){}' | i386-jos-elf-gcc -pg -m32 -S -x c -o - -
main:
pushl %ebp
movl %esp, %ebp
.LP0:
movl $.LP0,%edx # this line
call _mcount
popl %ebp
ret
.ident "GCC: (GNU) 4.9.2"
# On Linux, some code omitted
$ echo 'int main(){}' | gcc -pg -S -m32 -x c -o - -
main:
pushl %ebp
movl %esp, %ebp
call mcount
popl %ebp
ret
.ident "GCC: (Ubuntu 4.8.2-19ubuntu1) 4.8.2"
1. It happens only in cross compilation.
2. The target is i386-jos-elf and the host is Darwin.
3. I've tested with GCC version 4.6.1, 4.6.4 and 4.9.2.
4. How can I disable it?
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug target/66457] gcc generates an extra "mov ??, %edx" before "call mcount" when "-pg" is enabled in cross compilation
2015-06-08 9:51 [Bug c/66457] New: gcc generates an extra "mov ??, %edx" before "call mcount" when "-pg" is enabled in cross compilation leedypku at gmail dot com
@ 2015-06-08 9:55 ` pinskia at gcc dot gnu.org
2015-06-08 9:59 ` leedypku at gmail dot com
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: pinskia at gcc dot gnu.org @ 2015-06-08 9:55 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66457
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Which compiler are you using to compile the cross compiler on Darwin? I can't
tell if you have tried a cross compiler to elf under linux either, only the
native one.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug target/66457] gcc generates an extra "mov ??, %edx" before "call mcount" when "-pg" is enabled in cross compilation
2015-06-08 9:51 [Bug c/66457] New: gcc generates an extra "mov ??, %edx" before "call mcount" when "-pg" is enabled in cross compilation leedypku at gmail dot com
2015-06-08 9:55 ` [Bug target/66457] " pinskia at gcc dot gnu.org
@ 2015-06-08 9:59 ` leedypku at gmail dot com
2015-06-08 10:20 ` leedypku at gmail dot com
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: leedypku at gmail dot com @ 2015-06-08 9:59 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66457
--- Comment #2 from Dangyi Liu <leedypku at gmail dot com> ---
(In reply to Andrew Pinski from comment #1)
> Which compiler are you using to compile the cross compiler on Darwin? I
> can't tell if you have tried a cross compiler to elf under linux either,
> only the native one.
I compiled the cross compiler using clang. Now I'm trying to reproduce this bug
under Linux.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug target/66457] gcc generates an extra "mov ??, %edx" before "call mcount" when "-pg" is enabled in cross compilation
2015-06-08 9:51 [Bug c/66457] New: gcc generates an extra "mov ??, %edx" before "call mcount" when "-pg" is enabled in cross compilation leedypku at gmail dot com
2015-06-08 9:55 ` [Bug target/66457] " pinskia at gcc dot gnu.org
2015-06-08 9:59 ` leedypku at gmail dot com
@ 2015-06-08 10:20 ` leedypku at gmail dot com
2015-06-08 10:27 ` pinskia at gcc dot gnu.org
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: leedypku at gmail dot com @ 2015-06-08 10:20 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66457
--- Comment #3 from Dangyi Liu <leedypku at gmail dot com> ---
This still happens on Linux.
$ echo 'int main(){}' | ./i386-jos-elf-gcc -pg -m32 -S -x c -o - -
main:
pushl %ebp
movl %esp, %ebp
.LP0:
movl $.LP0,%edx
call _mcount
popl %ebp
.LCFI2:
ret
.ident "GCC: (GNU) 4.8.4"
$ ./i386-jos-elf-gcc -v
Using built-in specs.
COLLECT_GCC=./i386-jos-elf-gcc
COLLECT_LTO_WRAPPER=/home/leedy/gcc-4.8.4/bin/libexec/gcc/i386-jos-elf/4.8.4/lto-wrapper
Target: i386-jos-elf
Configured with: ../configure --prefix=/home/leedy/gcc-4.8.4/bin
--target=i386-jos-elf --disable-werror --disable-libssp --disable-libmudflap
--disable-multilib --disable-nls --without-headers --enable-languages=c
Thread model: single
gcc version 4.8.4 (GCC)
Did I do something wrong during with the configuration?
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug target/66457] gcc generates an extra "mov ??, %edx" before "call mcount" when "-pg" is enabled in cross compilation
2015-06-08 9:51 [Bug c/66457] New: gcc generates an extra "mov ??, %edx" before "call mcount" when "-pg" is enabled in cross compilation leedypku at gmail dot com
` (2 preceding siblings ...)
2015-06-08 10:20 ` leedypku at gmail dot com
@ 2015-06-08 10:27 ` pinskia at gcc dot gnu.org
2015-06-08 10:28 ` pinskia at gcc dot gnu.org
2015-06-08 13:41 ` leedypku at gmail dot com
5 siblings, 0 replies; 7+ messages in thread
From: pinskia at gcc dot gnu.org @ 2015-06-08 10:27 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66457
--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Yes you don't define NO_PROFILE_COUNTERS . That is the default i386-elf
target defaults to NO_PROFILE_COUNTERS not being defined.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug target/66457] gcc generates an extra "mov ??, %edx" before "call mcount" when "-pg" is enabled in cross compilation
2015-06-08 9:51 [Bug c/66457] New: gcc generates an extra "mov ??, %edx" before "call mcount" when "-pg" is enabled in cross compilation leedypku at gmail dot com
` (3 preceding siblings ...)
2015-06-08 10:27 ` pinskia at gcc dot gnu.org
@ 2015-06-08 10:28 ` pinskia at gcc dot gnu.org
2015-06-08 13:41 ` leedypku at gmail dot com
5 siblings, 0 replies; 7+ messages in thread
From: pinskia at gcc dot gnu.org @ 2015-06-08 10:28 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66457
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Invalid as explained.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug target/66457] gcc generates an extra "mov ??, %edx" before "call mcount" when "-pg" is enabled in cross compilation
2015-06-08 9:51 [Bug c/66457] New: gcc generates an extra "mov ??, %edx" before "call mcount" when "-pg" is enabled in cross compilation leedypku at gmail dot com
` (4 preceding siblings ...)
2015-06-08 10:28 ` pinskia at gcc dot gnu.org
@ 2015-06-08 13:41 ` leedypku at gmail dot com
5 siblings, 0 replies; 7+ messages in thread
From: leedypku at gmail dot com @ 2015-06-08 13:41 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66457
--- Comment #6 from Dangyi Liu <leedypku at gmail dot com> ---
(In reply to Andrew Pinski from comment #4)
> Yes you don't define NO_PROFILE_COUNTERS . That is the default i386-elf
> target defaults to NO_PROFILE_COUNTERS not being defined.
Thank you very much!!! But I don't know how to define this macro during
building phase, and I can't find any useful information using Google. Could you
help me ?
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2015-06-08 13:41 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
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2015-06-08 9:51 [Bug c/66457] New: gcc generates an extra "mov ??, %edx" before "call mcount" when "-pg" is enabled in cross compilation leedypku at gmail dot com
2015-06-08 9:55 ` [Bug target/66457] " pinskia at gcc dot gnu.org
2015-06-08 9:59 ` leedypku at gmail dot com
2015-06-08 10:20 ` leedypku at gmail dot com
2015-06-08 10:27 ` pinskia at gcc dot gnu.org
2015-06-08 10:28 ` pinskia at gcc dot gnu.org
2015-06-08 13:41 ` leedypku at gmail dot com
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