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* [Bug c/19558] New: openssl speed compiled with 20051020 gcc-4.0 (HEAD) segfaults
@ 2005-01-21 2:18 gj at pointblue dot com dot pl
2005-01-21 2:22 ` [Bug target/19558] " pinskia at gcc dot gnu dot org
` (15 more replies)
0 siblings, 16 replies; 17+ messages in thread
From: gj at pointblue dot com dot pl @ 2005-01-21 2:18 UTC (permalink / raw)
To: gcc-bugs
simply compile openssl 0.9.7e with gcc 4.0 and run openssl speed (speed
benchmark).
Backtrace:
#0 0x00002aaaaad71ed4 in bn_add_words () from /usr/lib64/libcrypto.so.0.9.7
#1 0x00002aaaaad692d7 in BN_uadd () from /usr/lib64/libcrypto.so.0.9.7
#2 0x00002aaaaad70a05 in BN_mod_inverse () from /usr/lib64/libcrypto.so.0.9.7
#3 0x00002aaaaad7bec7 in RSA_blinding_on () from /usr/lib64/libcrypto.so.0.9.7
#4 0x00002aaaaad7a1e0 in RSA_PKCS1_SSLeay ()
from /usr/lib64/libcrypto.so.0.9.7
#5 0x00002aaaaad7a716 in RSA_PKCS1_SSLeay ()
from /usr/lib64/libcrypto.so.0.9.7
#6 0x00002aaaaad7c222 in RSA_sign () from /usr/lib64/libcrypto.so.0.9.7
#7 0x0000000000430d57 in ?? ()
#8 0x00000000004111c5 in ?? ()
#9 0x0000000000411816 in ?? ()
#10 0x00002aaaab058829 in __libc_start_main () from /lib64/tls/libc.so.6
#
disassemby of corrupted (it seems) place:
0x00002aaaaad71ec0 <bn_add_words+0>: xor %r8d,%r8d
0x00002aaaaad71ec3 <bn_add_words+3>: test %ecx,%ecx
0x00002aaaaad71ec5 <bn_add_words+5>: jle 0x2aaaaad71eec <bn_add_words+44>
0x00002aaaaad71ec7 <bn_add_words+7>: mov %rdx,%rax
0x00002aaaaad71eca <bn_add_words+10>: sub %rdx,%rdx
0x00002aaaaad71ecd <bn_add_words+13>: data16
0x00002aaaaad71ece <bn_add_words+14>: data16
0x00002aaaaad71ecf <bn_add_words+15>: nop
0x00002aaaaad71ed0 <bn_add_words+16>: mov (%rsi,%rdx,8),%rax
0x00002aaaaad71ed4 <bn_add_words+20>: adc (%rdx,%rdx,8),%rax
0x00002aaaaad71ed8 <bn_add_words+24>: mov %rax,(%rdi,%rdx,8)
0x00002aaaaad71edc <bn_add_words+28>: lea 0x1(%rdx),%rdx
0x00002aaaaad71ee0 <bn_add_words+32>: loop 0x2aaaaad71ed0 <bn_add_words+16>
0x00002aaaaad71ee2 <bn_add_words+34>: sbb %rax,%rax
0x00002aaaaad71ee5 <bn_add_words+37>: mov %rax,%r8
0x00002aaaaad71ee8 <bn_add_words+40>: and $0x1,%r8d
0x00002aaaaad71eec <bn_add_words+44>: mov %r8,%rax
0x00002aaaaad71eef <bn_add_words+47>: retq
I'll attach --save-temps output or this source, if necessary.
--
Summary: openssl speed compiled with 20051020 gcc-4.0 (HEAD)
segfaults
Product: gcc
Version: 4.0.0
Status: UNCONFIRMED
Severity: critical
Priority: P2
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: gj at pointblue dot com dot pl
CC: gcc-bugs at gcc dot gnu dot org
GCC host triplet: x86_64
GCC target triplet: amd64
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19558
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug target/19558] openssl speed compiled with 20051020 gcc-4.0 (HEAD) segfaults
2005-01-21 2:18 [Bug c/19558] New: openssl speed compiled with 20051020 gcc-4.0 (HEAD) segfaults gj at pointblue dot com dot pl
@ 2005-01-21 2:22 ` pinskia at gcc dot gnu dot org
2005-01-21 2:49 ` gj at pointblue dot com dot pl
` (14 subsequent siblings)
15 siblings, 0 replies; 17+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-01-21 2:22 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
Severity|critical |normal
Component|c |target
Keywords| |wrong-code
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19558
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug target/19558] openssl speed compiled with 20051020 gcc-4.0 (HEAD) segfaults
2005-01-21 2:18 [Bug c/19558] New: openssl speed compiled with 20051020 gcc-4.0 (HEAD) segfaults gj at pointblue dot com dot pl
2005-01-21 2:22 ` [Bug target/19558] " pinskia at gcc dot gnu dot org
@ 2005-01-21 2:49 ` gj at pointblue dot com dot pl
2005-01-21 9:10 ` steven at gcc dot gnu dot org
` (13 subsequent siblings)
15 siblings, 0 replies; 17+ messages in thread
From: gj at pointblue dot com dot pl @ 2005-01-21 2:49 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From gj at pointblue dot com dot pl 2005-01-21 02:49 -------
it looks like that in x86_64.i file:
unsigned long bn_add_words (unsigned long *rp, unsigned long *ap, unsigned long
*bp,int n)
{ unsigned long ret,i;
if (n <= 0) return 0;
asm (
" subq %2,%2 \n"
".align 16 \n"
"1: movq (%4,%2,8),%0 \n"
" adcq (%5,%2,8),%0 \n"
" movq %0,(%3,%2,8) \n"
" leaq 1(%2),%2 \n"
" loop 1b \n"
" sbbq %0,%0 \n"
"); asm "addq %: "+a"(ret),"+c"(n),"+r"(i)
: "r"(rp),"r"(ap),"r"(bp)
: "cc"
);
return ret&1;
}
and in .s file:
bn_add_words:
.LFB11:
.loc 1 154 0
.loc 1 156 0
.LBB25:
xorl %r9d, %r9d
testl %ecx, %ecx
jle .L49
.loc 1 158 0
#APP
subq %r8,%r8
.align 16
1: movq (%rsi,%r8,8),%rax
adcq (%rdx,%r8,8),%rax
movq %rax,(%rdi,%r8,8)
leaq 1(%r8),%r8
loop 1b
sbbq %rax,%rax
#NO_APP
movq %rax, %r9
.loc 1 172 0
andl $1, %r9d
.loc 1 173 0
.L49:
.LBE25:
movq %r9, %rax
ret
so it looks like function written in assembler by programmer. At least to me.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19558
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug target/19558] openssl speed compiled with 20051020 gcc-4.0 (HEAD) segfaults
2005-01-21 2:18 [Bug c/19558] New: openssl speed compiled with 20051020 gcc-4.0 (HEAD) segfaults gj at pointblue dot com dot pl
2005-01-21 2:22 ` [Bug target/19558] " pinskia at gcc dot gnu dot org
2005-01-21 2:49 ` gj at pointblue dot com dot pl
@ 2005-01-21 9:10 ` steven at gcc dot gnu dot org
2005-01-21 9:13 ` steven at gcc dot gnu dot org
` (12 subsequent siblings)
15 siblings, 0 replies; 17+ messages in thread
From: steven at gcc dot gnu dot org @ 2005-01-21 9:10 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From steven at gcc dot gnu dot org 2005-01-21 09:10 -------
Your test case in comment #2 has syntax errors. Please provide something
that does compile.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19558
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug target/19558] openssl speed compiled with 20051020 gcc-4.0 (HEAD) segfaults
2005-01-21 2:18 [Bug c/19558] New: openssl speed compiled with 20051020 gcc-4.0 (HEAD) segfaults gj at pointblue dot com dot pl
` (2 preceding siblings ...)
2005-01-21 9:10 ` steven at gcc dot gnu dot org
@ 2005-01-21 9:13 ` steven at gcc dot gnu dot org
2005-01-21 9:43 ` gj at pointblue dot com dot pl
` (11 subsequent siblings)
15 siblings, 0 replies; 17+ messages in thread
From: steven at gcc dot gnu dot org @ 2005-01-21 9:13 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From steven at gcc dot gnu dot org 2005-01-21 09:13 -------
The test case in comment #1 I mean, of course.
You also did not specify how you compiled the test. This bug report
misses basically *all* the information we need to do anything useful
for you. Please read http://gcc.gnu.org/bugs.html and give us the
things we need ;-)
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19558
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug target/19558] openssl speed compiled with 20051020 gcc-4.0 (HEAD) segfaults
2005-01-21 2:18 [Bug c/19558] New: openssl speed compiled with 20051020 gcc-4.0 (HEAD) segfaults gj at pointblue dot com dot pl
` (3 preceding siblings ...)
2005-01-21 9:13 ` steven at gcc dot gnu dot org
@ 2005-01-21 9:43 ` gj at pointblue dot com dot pl
2005-01-21 10:08 ` gj at pointblue dot com dot pl
` (10 subsequent siblings)
15 siblings, 0 replies; 17+ messages in thread
From: gj at pointblue dot com dot pl @ 2005-01-21 9:43 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From gj at pointblue dot com dot pl 2005-01-21 09:43 -------
procedure was simple. The distro I am using on my amd64 is PLD
(www.pld-linux.org).
I got their openssl.spec, changed .rpmmacros to use gcc-4.0 for compilaition.
gcc was prepared from sources, I do recompile it quite often.
what params spec is giving to ./config in openssl ?
./Configure --openssldir=%{_var}/lib/%{name} linux-x86_64 shared debug
I've added debug, and --save-temps to OPTFLAGS, so I can get dumps.
where --openssldir doesn't matter in that case.
>From that compiler uses:
gcc-4.0 -fPIC -DOPENSSL_THREADS -D_REENTRANT -DDSO_DLFCN -DHAVE_DLFCN_H
-DOPENSSL_NO_KRB5 -m64 -DL_ENDIAN -DTERMIO -O2 -g --save-temps -Wall
-DMD32_REG_T=int -c plus some -I options.
I'll attach both full *.i and *.s file for (probably) the one that crashes.
I can provide you with access to that box if needed, or put somewhere tar.bz2
of build tree of made sources. Whatever.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19558
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug target/19558] openssl speed compiled with 20051020 gcc-4.0 (HEAD) segfaults
2005-01-21 2:18 [Bug c/19558] New: openssl speed compiled with 20051020 gcc-4.0 (HEAD) segfaults gj at pointblue dot com dot pl
` (4 preceding siblings ...)
2005-01-21 9:43 ` gj at pointblue dot com dot pl
@ 2005-01-21 10:08 ` gj at pointblue dot com dot pl
2005-01-21 12:11 ` gj at pointblue dot com dot pl
` (9 subsequent siblings)
15 siblings, 0 replies; 17+ messages in thread
From: gj at pointblue dot com dot pl @ 2005-01-21 10:08 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From gj at pointblue dot com dot pl 2005-01-21 10:07 -------
unsigned long bn_add_words (unsigned long *rp, unsigned long *ap, unsigned long
*bp,int n)
{ unsigned long ret,i;
if (n <= 0) return 0;
asm (
" subq %2,%2 \n"
".align 16 \n"
"1: movq (%4,%2,8),%0 \n"
" adcq (%5,%2,8),%0 \n"
" movq %0,(%3,%2,8) \n"
" leaq 1(%2),%2 \n"
" loop 1b \n"
" sbbq %0,%0 \n"
: "+a"(ret),"+c"(n),"+r"(i)
: "r"(rp),"r"(ap),"r"(bp)
: "cc"
);
return ret&1;
}
again.
Probably bugzilla is mangling something.
Just go to .i file and search for bn_add_words ;)
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19558
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug target/19558] openssl speed compiled with 20051020 gcc-4.0 (HEAD) segfaults
2005-01-21 2:18 [Bug c/19558] New: openssl speed compiled with 20051020 gcc-4.0 (HEAD) segfaults gj at pointblue dot com dot pl
` (5 preceding siblings ...)
2005-01-21 10:08 ` gj at pointblue dot com dot pl
@ 2005-01-21 12:11 ` gj at pointblue dot com dot pl
2005-01-23 22:05 ` rth at gcc dot gnu dot org
` (8 subsequent siblings)
15 siblings, 0 replies; 17+ messages in thread
From: gj at pointblue dot com dot pl @ 2005-01-21 12:11 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From gj at pointblue dot com dot pl 2005-01-21 12:11 -------
0.9.7d crashes too.
Please try it on your machines.If you have some amd64 computer.
>From the backtrace:
...
0x00002aaaaad71ecd <bn_add_words+13>: data16
0x00002aaaaad71ece <bn_add_words+14>: data16
0x00002aaaaad71ecf <bn_add_words+15>: nop
...
this 'data' is from .align 16. Shouldn't it all be nop's ?
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19558
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug target/19558] openssl speed compiled with 20051020 gcc-4.0 (HEAD) segfaults
2005-01-21 2:18 [Bug c/19558] New: openssl speed compiled with 20051020 gcc-4.0 (HEAD) segfaults gj at pointblue dot com dot pl
` (6 preceding siblings ...)
2005-01-21 12:11 ` gj at pointblue dot com dot pl
@ 2005-01-23 22:05 ` rth at gcc dot gnu dot org
2005-01-24 1:50 ` gj at pointblue dot com dot pl
` (7 subsequent siblings)
15 siblings, 0 replies; 17+ messages in thread
From: rth at gcc dot gnu dot org @ 2005-01-23 22:05 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From rth at gcc dot gnu dot org 2005-01-23 22:04 -------
No, it should not. See the AMD K8 documentation for recommended nop sequences.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution| |INVALID
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19558
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug target/19558] openssl speed compiled with 20051020 gcc-4.0 (HEAD) segfaults
2005-01-21 2:18 [Bug c/19558] New: openssl speed compiled with 20051020 gcc-4.0 (HEAD) segfaults gj at pointblue dot com dot pl
` (7 preceding siblings ...)
2005-01-23 22:05 ` rth at gcc dot gnu dot org
@ 2005-01-24 1:50 ` gj at pointblue dot com dot pl
2005-01-24 18:48 ` gj at pointblue dot com dot pl
` (6 subsequent siblings)
15 siblings, 0 replies; 17+ messages in thread
From: gj at pointblue dot com dot pl @ 2005-01-24 1:50 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From gj at pointblue dot com dot pl 2005-01-24 01:50 -------
how is it invalid ?
openssl is crashing only when compiled with gcc4. It might not be the problem
I've higlighted, but this crash is a fact!.
IOW, you didn't enter any resolution.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19558
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug target/19558] openssl speed compiled with 20051020 gcc-4.0 (HEAD) segfaults
2005-01-21 2:18 [Bug c/19558] New: openssl speed compiled with 20051020 gcc-4.0 (HEAD) segfaults gj at pointblue dot com dot pl
` (8 preceding siblings ...)
2005-01-24 1:50 ` gj at pointblue dot com dot pl
@ 2005-01-24 18:48 ` gj at pointblue dot com dot pl
2005-01-24 19:01 ` pinskia at gcc dot gnu dot org
` (5 subsequent siblings)
15 siblings, 0 replies; 17+ messages in thread
From: gj at pointblue dot com dot pl @ 2005-01-24 18:48 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From gj at pointblue dot com dot pl 2005-01-24 18:47 -------
sorry, still happends on amd64. I don't have intel 32bit platorm to test it on.
I can only say it works fine on 32bit compiled openss for sparc.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |UNCONFIRMED
Resolution|INVALID |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19558
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug target/19558] openssl speed compiled with 20051020 gcc-4.0 (HEAD) segfaults
2005-01-21 2:18 [Bug c/19558] New: openssl speed compiled with 20051020 gcc-4.0 (HEAD) segfaults gj at pointblue dot com dot pl
` (9 preceding siblings ...)
2005-01-24 18:48 ` gj at pointblue dot com dot pl
@ 2005-01-24 19:01 ` pinskia at gcc dot gnu dot org
2005-01-24 20:37 ` gj at pointblue dot com dot pl
` (4 subsequent siblings)
15 siblings, 0 replies; 17+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-01-24 19:01 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2005-01-24 19:00 -------
".align 16 \n"
This is the bug but it is not in gcc, either it is in binutils or in the source, not in gcc since gcc just
outputs the assembly instruction aka it just copies and pastes.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution| |INVALID
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19558
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug target/19558] openssl speed compiled with 20051020 gcc-4.0 (HEAD) segfaults
2005-01-21 2:18 [Bug c/19558] New: openssl speed compiled with 20051020 gcc-4.0 (HEAD) segfaults gj at pointblue dot com dot pl
` (10 preceding siblings ...)
2005-01-24 19:01 ` pinskia at gcc dot gnu dot org
@ 2005-01-24 20:37 ` gj at pointblue dot com dot pl
2005-01-27 6:24 ` rth at gcc dot gnu dot org
` (3 subsequent siblings)
15 siblings, 0 replies; 17+ messages in thread
From: gj at pointblue dot com dot pl @ 2005-01-24 20:37 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From gj at pointblue dot com dot pl 2005-01-24 20:37 -------
so if it is binutils, how do you explain that gcc 3.3.5 got that right, and it
isnt' ok with 4.0 ?
I have the very same version of binutils in both cases.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19558
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug target/19558] openssl speed compiled with 20051020 gcc-4.0 (HEAD) segfaults
2005-01-21 2:18 [Bug c/19558] New: openssl speed compiled with 20051020 gcc-4.0 (HEAD) segfaults gj at pointblue dot com dot pl
` (11 preceding siblings ...)
2005-01-24 20:37 ` gj at pointblue dot com dot pl
@ 2005-01-27 6:24 ` rth at gcc dot gnu dot org
2005-01-27 13:46 ` gj at pointblue dot com dot pl
` (2 subsequent siblings)
15 siblings, 0 replies; 17+ messages in thread
From: rth at gcc dot gnu dot org @ 2005-01-27 6:24 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From rth at gcc dot gnu dot org 2005-01-27 06:24 -------
I say you've completely mis-diagnosed the problem, since "0x66 0x66 0x90"
is a PERFECTLY LEGITIMATE x86-64 nop sequence.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19558
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug target/19558] openssl speed compiled with 20051020 gcc-4.0 (HEAD) segfaults
2005-01-21 2:18 [Bug c/19558] New: openssl speed compiled with 20051020 gcc-4.0 (HEAD) segfaults gj at pointblue dot com dot pl
` (12 preceding siblings ...)
2005-01-27 6:24 ` rth at gcc dot gnu dot org
@ 2005-01-27 13:46 ` gj at pointblue dot com dot pl
2005-05-31 3:47 ` dank at kegel dot com
2005-05-31 4:17 ` pinskia at gcc dot gnu dot org
15 siblings, 0 replies; 17+ messages in thread
From: gj at pointblue dot com dot pl @ 2005-01-27 13:46 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From gj at pointblue dot com dot pl 2005-01-27 13:46 -------
Subject: Re: openssl speed compiled with 20051020 gcc-4.0
(HEAD) segfaults
rth at gcc dot gnu dot org wrote:
> ------- Additional Comments From rth at gcc dot gnu dot org 2005-01-27 06:24 -------
> I say you've completely mis-diagnosed the problem, since "0x66 0x66 0x90"
> is a PERFECTLY LEGITIMATE x86-64 nop sequence.
>
sure, but that still doesn't make this bug not valid. It does it on any
amd64 machine I have here. It doesn't do it on sparc32 (with 64bit
kernel). I don't have any other arch to test it on. Hence, if someone
would be so kind and test it for me. Either deny or will get the same
resoults. I am very much in doubt this is caused by binutils.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19558
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug target/19558] openssl speed compiled with 20051020 gcc-4.0 (HEAD) segfaults
2005-01-21 2:18 [Bug c/19558] New: openssl speed compiled with 20051020 gcc-4.0 (HEAD) segfaults gj at pointblue dot com dot pl
` (13 preceding siblings ...)
2005-01-27 13:46 ` gj at pointblue dot com dot pl
@ 2005-05-31 3:47 ` dank at kegel dot com
2005-05-31 4:17 ` pinskia at gcc dot gnu dot org
15 siblings, 0 replies; 17+ messages in thread
From: dank at kegel dot com @ 2005-05-31 3:47 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From dank at kegel dot com 2005-05-31 03:41 -------
See also http://marc.theaimsgroup.com/?l=openssl-dev&m=111238996923252&w=2
which says
--- snip ---
gcc-4 miscompiles inline assembly bn/asm/x86_64-gcc.c so that the
functions bn_add_words and bn_sub_words are broken and segfault.
This applies only to the stable branch as in the devel branch there is
added initialization of the ret and i variables. However the
initialization is unnecessary instead the code should be modified this way:
@@ -164,7 +186,7 @@
" leaq 1(%2),%2 \n"
" loop 1b \n"
" sbbq %0,%0 \n"
- : "+a"(ret),"+c"(n),"+r"(i)
+ : "=&a"(ret),"+c"(n),"=&r"(i)
: "r"(rp),"r"(ap),"r"(bp)
: "cc"
);
@@ -187,7 +209,7 @@
" leaq 1(%2),%2 \n"
" loop 1b \n"
" sbbq %0,%0 \n"
- : "+a"(ret),"+c"(n),"+r"(i)
+ : "=&a"(ret),"+c"(n),"=&r"(i)
: "r"(rp),"r"(ap),"r"(bp)
: "cc"
);
--- snip ---
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19558
^ permalink raw reply [flat|nested] 17+ messages in thread
* [Bug target/19558] openssl speed compiled with 20051020 gcc-4.0 (HEAD) segfaults
2005-01-21 2:18 [Bug c/19558] New: openssl speed compiled with 20051020 gcc-4.0 (HEAD) segfaults gj at pointblue dot com dot pl
` (14 preceding siblings ...)
2005-05-31 3:47 ` dank at kegel dot com
@ 2005-05-31 4:17 ` pinskia at gcc dot gnu dot org
15 siblings, 0 replies; 17+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-05-31 4:17 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2005-05-31 03:44 -------
(In reply to comment #17)
> See also http://marc.theaimsgroup.com/?l=openssl-dev&m=111238996923252&w=2
> which says
>
> --- snip ---
> gcc-4 miscompiles inline assembly bn/asm/x86_64-gcc.c so that the
> functions bn_add_words and bn_sub_words are broken and segfault.
Actually the inline-asm is questionable, see PR 20718 and it is not a regression by the way, people just
got lucky with older versions of GCC with that inline-asm.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19558
^ permalink raw reply [flat|nested] 17+ messages in thread
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2005-01-21 2:18 [Bug c/19558] New: openssl speed compiled with 20051020 gcc-4.0 (HEAD) segfaults gj at pointblue dot com dot pl
2005-01-21 2:22 ` [Bug target/19558] " pinskia at gcc dot gnu dot org
2005-01-21 2:49 ` gj at pointblue dot com dot pl
2005-01-21 9:10 ` steven at gcc dot gnu dot org
2005-01-21 9:13 ` steven at gcc dot gnu dot org
2005-01-21 9:43 ` gj at pointblue dot com dot pl
2005-01-21 10:08 ` gj at pointblue dot com dot pl
2005-01-21 12:11 ` gj at pointblue dot com dot pl
2005-01-23 22:05 ` rth at gcc dot gnu dot org
2005-01-24 1:50 ` gj at pointblue dot com dot pl
2005-01-24 18:48 ` gj at pointblue dot com dot pl
2005-01-24 19:01 ` pinskia at gcc dot gnu dot org
2005-01-24 20:37 ` gj at pointblue dot com dot pl
2005-01-27 6:24 ` rth at gcc dot gnu dot org
2005-01-27 13:46 ` gj at pointblue dot com dot pl
2005-05-31 3:47 ` dank at kegel dot com
2005-05-31 4:17 ` pinskia at gcc dot gnu dot org
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