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* [Bug target/49521] New: [arm] Bad PIC register load in for static initializers
@ 2011-06-24 13:37 rmansfield at qnx dot com
2011-06-24 13:48 ` [Bug target/49521] " ramana at gcc dot gnu.org
` (5 more replies)
0 siblings, 6 replies; 7+ messages in thread
From: rmansfield at qnx dot com @ 2011-06-24 13:37 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49521
Summary: [arm] Bad PIC register load in for static initializers
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: rmansfield@qnx.com
Host: x86_64-linux-gnu
Target: arm-unknown-linux-gnu
Build: x86_64-linux-gnu
$ ./xgcc -v
../configure --target=arm-unknown-linux-gnu
--prefix=/home/ryan/x-tools/arm-unknown-linux-gnu
--with-headers=/home/ryan/x-tools/arm-unknown-linux-gnu/arm-unknown-linux-gnu/include
--with-local-prefix=/home/ryan/x-tools/arm-unknown-linux-gnu/arm-unknown-linux-gnu
--disable-nls --enable-threads=posix --enable-symvers=gnu --enable-__cxa_atexit
--enable-languages=c++ --enable-shared --enable-c99 --enable-long-long
Thread model: posix
gcc version 4.6.1 20110518 (prerelease) [gcc-4_6-branch revision 173875] (GCC)
Yes, this only happens with the old ABI but this wrong-code seems to happens
very frequently.
$ ./xgcc -B. -fpic -O2 ~/t.ii -S
_GLOBAL__sub_I_t.ii:
@ args = 0, pretend = 0, frame = 116
@ frame_needed = 1, uses_anonymous_args = 0
stmfd sp!, {fp, lr}
ldr r1, .L1064 <- load GOT offset
add fp, sp, #4
sub sp, sp, #116
mov r0, #0
ldr r1, [r0, r1] <- crash
<snip>
.L1064:
.word __gxx_personality_sj0(GOT)
(note 2 354 264 NOTE_INSN_FUNCTION_BEG)
(insn 264 2 287 (set (reg:SI 2 r2)
(const_int 0 [0])) 168 {*arm_movsi_insn}
(expr_list:REG_EQUAL (const_int 0 [0])
(nil)))
(insn 287 264 288 (set (reg:SI 3 r3 [275])
(unspec:SI [
(mem:SI (label_ref 364) [0 S4 A32])
] 3)) 170 {pic_load_addr_32bit}
(expr_list:REG_EQUIV (unspec:SI [
(symbol_ref:SI ("__gxx_personality_sj0") [flags 0x41])
] 3)
(nil)))
(insn 288 287 229 (set (reg/f:SI 3 r3 [256])
(mem:SI (plus:SI (reg:SI 2 r2)
(reg:SI 3 r3 [275])) [0 S4 A32])) 168 {*arm_movsi_insn}
(expr_list:REG_DEAD (reg:SI 2 r2)
(expr_list:REG_EQUIV (symbol_ref:SI ("__gxx_personality_sj0") [flags
0x41])
(nil))))
(insn 229 288 230 (set (mem/c:SI (plus:SI (reg/f:SI 11 fp)
(const_int -32 [0xffffffffffffffe0])) [0 S4 A32])
(reg/f:SI 3 r3 [256])) 168 {*arm_movsi_insn}
(expr_list:REG_DEAD (reg/f:SI 3 r3 [256])
(nil)))
If I explicitly specify a PIC register (e.g. -mpic-register=4), the load is
sane.
e.g.
_GLOBAL__sub_I_t.ii:
@ args = 0, pretend = 0, frame = 112
@ frame_needed = 1, uses_anonymous_args = 0
stmfd sp!, {r4, fp, lr}
ldr r4, .L1064
add fp, sp, #8
ldr r2, .L1064+4
sub sp, sp, #112
ldr r1, .L1064+8
ldr r0, .L1064+12
.LPIC227:
add r4, pc, r4
ldr r3, .L1064+16
ldr r1, [r4, r1]
<snip>
.L1064:
.word _GLOBAL_OFFSET_TABLE_-(.LPIC227+8)
.word .LLSDA1449-(.LPIC224+8)
.word __gxx_personality_sj0(GOT)
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug target/49521] [arm] Bad PIC register load in for static initializers
2011-06-24 13:37 [Bug target/49521] New: [arm] Bad PIC register load in for static initializers rmansfield at qnx dot com
@ 2011-06-24 13:48 ` ramana at gcc dot gnu.org
2011-06-24 13:49 ` ramana at gcc dot gnu.org
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: ramana at gcc dot gnu.org @ 2011-06-24 13:48 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49521
Ramana Radhakrishnan <ramana at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ramana at gcc dot gnu.org
--- Comment #1 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> 2011-06-24 13:47:42 UTC ---
Missing a testcase for someone to take a look.
Ramana
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug target/49521] [arm] Bad PIC register load in for static initializers
2011-06-24 13:37 [Bug target/49521] New: [arm] Bad PIC register load in for static initializers rmansfield at qnx dot com
2011-06-24 13:48 ` [Bug target/49521] " ramana at gcc dot gnu.org
@ 2011-06-24 13:49 ` ramana at gcc dot gnu.org
2011-06-24 13:51 ` rmansfield at qnx dot com
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: ramana at gcc dot gnu.org @ 2011-06-24 13:49 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49521
Ramana Radhakrishnan <ramana at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2011.06.24 13:48:02
Ever Confirmed|0 |1
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug target/49521] [arm] Bad PIC register load in for static initializers
2011-06-24 13:37 [Bug target/49521] New: [arm] Bad PIC register load in for static initializers rmansfield at qnx dot com
2011-06-24 13:48 ` [Bug target/49521] " ramana at gcc dot gnu.org
2011-06-24 13:49 ` ramana at gcc dot gnu.org
@ 2011-06-24 13:51 ` rmansfield at qnx dot com
2011-06-24 13:57 ` ramana at gcc dot gnu.org
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: rmansfield at qnx dot com @ 2011-06-24 13:51 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49521
--- Comment #2 from Ryan Mansfield <rmansfield at qnx dot com> 2011-06-24 13:50:48 UTC ---
Created attachment 24591
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24591
preprocessed source
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug target/49521] [arm] Bad PIC register load in for static initializers
2011-06-24 13:37 [Bug target/49521] New: [arm] Bad PIC register load in for static initializers rmansfield at qnx dot com
` (2 preceding siblings ...)
2011-06-24 13:51 ` rmansfield at qnx dot com
@ 2011-06-24 13:57 ` ramana at gcc dot gnu.org
2011-06-24 14:27 ` [Bug target/49521] [arm] Bad PIC register load in " rmansfield at qnx dot com
2013-12-17 16:47 ` rmansfield at qnx dot com
5 siblings, 0 replies; 7+ messages in thread
From: ramana at gcc dot gnu.org @ 2011-06-24 13:57 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49521
Ramana Radhakrishnan <ramana at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |NEW
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug target/49521] [arm] Bad PIC register load in static initializers
2011-06-24 13:37 [Bug target/49521] New: [arm] Bad PIC register load in for static initializers rmansfield at qnx dot com
` (3 preceding siblings ...)
2011-06-24 13:57 ` ramana at gcc dot gnu.org
@ 2011-06-24 14:27 ` rmansfield at qnx dot com
2013-12-17 16:47 ` rmansfield at qnx dot com
5 siblings, 0 replies; 7+ messages in thread
From: rmansfield at qnx dot com @ 2011-06-24 14:27 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49521
Ryan Mansfield <rmansfield at qnx dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Summary|[arm] Bad PIC register load |[arm] Bad PIC register load
|in for static initializers |in static initializers
--- Comment #3 from Ryan Mansfield <rmansfield at qnx dot com> 2011-06-24 14:26:49 UTC ---
Add keyword.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug target/49521] [arm] Bad PIC register load in static initializers
2011-06-24 13:37 [Bug target/49521] New: [arm] Bad PIC register load in for static initializers rmansfield at qnx dot com
` (4 preceding siblings ...)
2011-06-24 14:27 ` [Bug target/49521] [arm] Bad PIC register load in " rmansfield at qnx dot com
@ 2013-12-17 16:47 ` rmansfield at qnx dot com
5 siblings, 0 replies; 7+ messages in thread
From: rmansfield at qnx dot com @ 2013-12-17 16:47 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49521
Ryan Mansfield <rmansfield at qnx dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |WONTFIX
--- Comment #4 from Ryan Mansfield <rmansfield at qnx dot com> ---
ARM OABI is no longer a supported target
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2013-12-17 16:47 UTC | newest]
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2011-06-24 13:37 [Bug target/49521] New: [arm] Bad PIC register load in for static initializers rmansfield at qnx dot com
2011-06-24 13:48 ` [Bug target/49521] " ramana at gcc dot gnu.org
2011-06-24 13:49 ` ramana at gcc dot gnu.org
2011-06-24 13:51 ` rmansfield at qnx dot com
2011-06-24 13:57 ` ramana at gcc dot gnu.org
2011-06-24 14:27 ` [Bug target/49521] [arm] Bad PIC register load in " rmansfield at qnx dot com
2013-12-17 16:47 ` rmansfield at qnx dot com
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