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* [Bug c/64012] New: GCC-4.9.2 option -fcaller-saves in -O2
@ 2014-11-21 7:43 airbak.li at huawei dot com
2014-11-21 7:47 ` [Bug middle-end/64012] " pinskia at gcc dot gnu.org
` (5 more replies)
0 siblings, 6 replies; 7+ messages in thread
From: airbak.li at huawei dot com @ 2014-11-21 7:43 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64012
Bug ID: 64012
Summary: GCC-4.9.2 option -fcaller-saves in -O2
Product: gcc
Version: 4.9.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: airbak.li at huawei dot com
A cross toolchain build by GCC-4.9.2, when I use this toolchain to compile
kernel-3.4.35 with option -O2, it always crash when system power up.
(CPU : armv-7 cortex-a9)
-----------Crash log------------------------------
Unable to handle kernel paging request at virtual address ffffffff
pgd = c0004000
[ffffffff] *pgd=85ffe821, *pte=00000000, *ppte=00000000
Internal error: Oops: 17 [#1] SMP ARM
Modules linked in:
CPU: 1 Not tainted (3.4.35_hi3535 #27)
PC is at kmem_cache_alloc+0x54/0x130
LR is at con_insert_unipair+0xc0/0x10c
pc : [<c00a5764>] lr : [<c028447c>] psr: a0000013
sp : c5831e60 ip : c05b27d8 fp : c5831e94
r10: 00000263 r9 : 00000003 r8 : 0000005f
r7 : 0000005f r6 : 000000d0 r5 : c5802200 r4 : ffffffff
r3 : 00000000 r2 : c5830000 r1 : c05a69e0 r0 : 0011e000
Flags: NzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel
Control: 10c53c7d Table: 8000404a DAC: 00000015
-------------Assembler code-------------------------
c00a5710 <kmem_cache_alloc>:
c00a5710: e1a0c00d mov ip, sp
c00a5714: e92ddff0 push {r4, r5, r6, r7, r8, r9, sl, fp, ip, lr, pc}
c00a5718: e24cb004 sub fp, ip, #4
c00a571c: e24dd00c sub sp, sp, #12
c00a5720: e1a0300d mov r3, sp
c00a5724: e3c32d7f bic r2, r3, #8128 ; 0x1fc0
c00a5728: e302c7d8 movw ip, #10200 ; 0x27d8
c00a572c: e3c2203f bic r2, r2, #63 ; 0x3f
c00a5730: e34cc05b movt ip, #49243 ; 0xc05b
c00a5734: e1a05000 mov r5, r0
c00a5738: e1a06001 mov r6, r1
c00a573c: e50be030 str lr, [fp, #-48] ; 0x30
c00a5740: e5923014 ldr r3, [r2, #20]
c00a5744: e5951000 ldr r1, [r5]
c00a5748: e79c0103 ldr r0, [ip, r3, lsl #2]
c00a574c: e0813000 add r3, r1, r0
c00a5750: e593a004 ldr sl, [r3, #4]
c00a5754: e7914000 ldr r4, [r1, r0]
c00a5758: e3540000 cmp r4, #0
c00a575c: 0a000026 beq c00a57fc <kmem_cache_alloc+0xec>
c00a5760: e5953014 ldr r3, [r5, #20]
c00a5764: e7949003 ldr r9, [r4, r3] --->r4 is ffffffff
c00a5768: e10f8000 mrs r8, CPSR
----------------------------------------------
When I compile kernel with "-O1" or "-O2 -fno-caller-saves", it is ok, no
crash.
(GCC-4.8 not have this problem)
Question:
1. Please tell me about option "-fcaller-saves" in GCC-4.9.2. Is it different
from GCC-4.8?
2. The error happen in code
"con_insert_unipair()->kmem_cache_alloc()->slab_alloc()", file path is
"linux-3.4.35\mm\slub.c".
What codes will "-fcaller-saves" optimize? Please give me some samples.
3."-fcaller-saves" may be not the root cause.
Generally, we use -O2 include "-fcaller-saves", we want to keep
"-fcaller-saves", please help me to solve it.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug middle-end/64012] GCC-4.9.2 option -fcaller-saves in -O2
2014-11-21 7:43 [Bug c/64012] New: GCC-4.9.2 option -fcaller-saves in -O2 airbak.li at huawei dot com
@ 2014-11-21 7:47 ` pinskia at gcc dot gnu.org
2014-11-21 8:40 ` airbak.li at huawei dot com
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: pinskia at gcc dot gnu.org @ 2014-11-21 7:47 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64012
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |Arm-linux-gnueabi
Component|c |middle-end
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I don't think fcaller-save made it into 4.9. Can provide the output of gcc -v?
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug middle-end/64012] GCC-4.9.2 option -fcaller-saves in -O2
2014-11-21 7:43 [Bug c/64012] New: GCC-4.9.2 option -fcaller-saves in -O2 airbak.li at huawei dot com
2014-11-21 7:47 ` [Bug middle-end/64012] " pinskia at gcc dot gnu.org
@ 2014-11-21 8:40 ` airbak.li at huawei dot com
2014-11-24 6:07 ` airbak.li at huawei dot com
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: airbak.li at huawei dot com @ 2014-11-21 8:40 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64012
--- Comment #2 from Airbak <airbak.li at huawei dot com> ---
lijianhui@key:~$ arm-unknown-linux-gnueabi-gcc -v
Using built-in specs.
COLLECT_GCC=arm-unknown-linux-gnueabi-gcc
COLLECT_LTO_WRAPPER=/home/os/lijianhui/linaro/new-crosstool-ng/install-2-multilib/bin/../libexec/gcc/arm-unknown-linux-gnueabi/4.9.2/lto-wrapper
Target: arm-unknown-linux-gnueabi
Configured with:
/home/os/lijianhui/linaro/new-crosstool-ng/.build/src/gcc-linaro-4.9-2014.09/configure
--build=x86_64-build_unknown-linux-gnu --host=x86_64-build_unknown-linux-gnu
--target=arm-unknown-linux-gnueabi
--prefix=/home/os/lijianhui/linaro/new-crosstool-ng/install
--with-sysroot=/home/os/lijianhui/linaro/new-crosstool-ng/install/arm-unknown-linux-gnueabi/libc
--enable-languages=c,c++ --with-pkgversion='crosstool-NG 1.20.0 - Linaro GCC
4.9-2014.09' --with-bugurl=https://bugs.launchpad.net/gcc-linaro
--enable-__cxa_atexit --disable-libmudflap --enable-libgomp --disable-libssp
--disable-libquadmath --disable-libquadmath-support --disable-libsanitizer
--with-gmp=/home/os/lijianhui/linaro/new-crosstool-ng/.build/arm-unknown-linux-gnueabi/buildtools
--with-mpfr=/home/os/lijianhui/linaro/new-crosstool-ng/.build/arm-unknown-linux-gnueabi/buildtools
--with-mpc=/home/os/lijianhui/linaro/new-crosstool-ng/.build/arm-unknown-linux-gnueabi/buildtools
--with-isl=/home/os/lijianhui/linaro/new-crosstool-ng/.build/arm-unknown-linux-gnueabi/buildtools
--with-cloog=/home/os/lijianhui/linaro/new-crosstool-ng/.build/arm-unknown-linux-gnueabi/buildtools
--with-libelf=/home/os/lijianhui/linaro/new-crosstool-ng/.build/arm-unknown-linux-gnueabi/buildtools
--enable-threads=posix --disable-libstdcxx-pch --enable-linker-build-id
--enable-plugin --disable-nls
--with-local-prefix=/home/os/lijianhui/linaro/new-crosstool-ng/install/arm-unknown-linux-gnueabi/libc
--enable-c99 --enable-long-long --with-multilib-list=aprofile
--with-system-zlib
Thread model: posix
gcc version 4.9.2 20140904 (prerelease) (crosstool-NG 1.20.0 - Linaro GCC
4.9-2014.09)
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug middle-end/64012] GCC-4.9.2 option -fcaller-saves in -O2
2014-11-21 7:43 [Bug c/64012] New: GCC-4.9.2 option -fcaller-saves in -O2 airbak.li at huawei dot com
2014-11-21 7:47 ` [Bug middle-end/64012] " pinskia at gcc dot gnu.org
2014-11-21 8:40 ` airbak.li at huawei dot com
@ 2014-11-24 6:07 ` airbak.li at huawei dot com
2014-11-24 6:59 ` airbak.li at huawei dot com
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: airbak.li at huawei dot com @ 2014-11-24 6:07 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64012
--- Comment #4 from Airbak <airbak.li at huawei dot com> ---
When I build toolchain with GNU <gcc-4.9.2.tar.bz2>, the problem also exist.
------------------
lijianhui@key:~/hi3535/Hi3535_SDK_V2.0.3.1/osdrv/kernel/linux-3.4.y$
arm-unknown-linux-gnueabi-gcc -v
Using built-in specs.
COLLECT_GCC=arm-unknown-linux-gnueabi-gcc
COLLECT_LTO_WRAPPER=/home/os/lijianhui/linaro/new-crosstool-ng/install-org-gcc/bin/../libexec/gcc/arm-unknown-linux-gnueabi/4.9.2/lto-wrapper
Target: arm-unknown-linux-gnueabi
Configured with:
/home/os/lijianhui/linaro/new-crosstool-ng/.build/src/gcc-4.9.2/configure
--build=x86_64-build_unknown-linux-gnu
--host=x86_64-build_unknown-linux-gnu --target=arm-unknown-linux-gnueabi
--prefix=/home/os/lijianhui/linaro/new-crosstool-ng/install
...
Any suggestions?
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug middle-end/64012] GCC-4.9.2 option -fcaller-saves in -O2
2014-11-21 7:43 [Bug c/64012] New: GCC-4.9.2 option -fcaller-saves in -O2 airbak.li at huawei dot com
` (2 preceding siblings ...)
2014-11-24 6:07 ` airbak.li at huawei dot com
@ 2014-11-24 6:59 ` airbak.li at huawei dot com
2014-11-24 9:53 ` ebotcazou at gcc dot gnu.org
2014-11-28 1:29 ` airbak.li at huawei dot com
5 siblings, 0 replies; 7+ messages in thread
From: airbak.li at huawei dot com @ 2014-11-24 6:59 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64012
--- Comment #5 from Airbak <airbak.li at huawei dot com> ---
I'm sorry for my mistake.
GCC-4.8.3 also have this phenomenon. GCC 4.4.1 is OK.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug middle-end/64012] GCC-4.9.2 option -fcaller-saves in -O2
2014-11-21 7:43 [Bug c/64012] New: GCC-4.9.2 option -fcaller-saves in -O2 airbak.li at huawei dot com
` (3 preceding siblings ...)
2014-11-24 6:59 ` airbak.li at huawei dot com
@ 2014-11-24 9:53 ` ebotcazou at gcc dot gnu.org
2014-11-28 1:29 ` airbak.li at huawei dot com
5 siblings, 0 replies; 7+ messages in thread
From: ebotcazou at gcc dot gnu.org @ 2014-11-24 9:53 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64012
Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Last reconfirmed| |2014-11-24
CC| |ebotcazou at gcc dot gnu.org
Resolution|INVALID |---
Ever confirmed|0 |1
--- Comment #6 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> I don't think fcaller-save made it into 4.9.
You're confusing -fcaller-saves and -fuse-caller-saves here.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug middle-end/64012] GCC-4.9.2 option -fcaller-saves in -O2
2014-11-21 7:43 [Bug c/64012] New: GCC-4.9.2 option -fcaller-saves in -O2 airbak.li at huawei dot com
` (4 preceding siblings ...)
2014-11-24 9:53 ` ebotcazou at gcc dot gnu.org
@ 2014-11-28 1:29 ` airbak.li at huawei dot com
5 siblings, 0 replies; 7+ messages in thread
From: airbak.li at huawei dot com @ 2014-11-28 1:29 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64012
Airbak <airbak.li at huawei dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |CLOSED
Resolution|INVALID |FIXED
--- Comment #8 from Airbak <airbak.li at huawei dot com> ---
The problem is solved. Thanks.
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2014-11-28 1:29 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
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2014-11-21 7:43 [Bug c/64012] New: GCC-4.9.2 option -fcaller-saves in -O2 airbak.li at huawei dot com
2014-11-21 7:47 ` [Bug middle-end/64012] " pinskia at gcc dot gnu.org
2014-11-21 8:40 ` airbak.li at huawei dot com
2014-11-24 6:07 ` airbak.li at huawei dot com
2014-11-24 6:59 ` airbak.li at huawei dot com
2014-11-24 9:53 ` ebotcazou at gcc dot gnu.org
2014-11-28 1:29 ` airbak.li at huawei dot com
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