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xadd instruction in 80386 code
- From: Miso <klampiar at gmail dot com>
- To: gcc-help at gcc dot gnu dot org
- Date: Wed, 13 Aug 2008 19:27:21 +0200
- Subject: xadd instruction in 80386 code
Hi, I have build system (gentoo) based on uclibc for my 80386. System
runs ok except of ctorrent and openssl. Ctorrent particularly crash
with "Illegal instruction" message.
Here is gdb output:
Program received signal SIGILL, Illegal instruction.
__gnu_cxx::__exchange_and_add (__mem=0xb7f32a8c, __val=1) at atomicity.cc:41
41 atomicity.cc: No such file or directory.
in atomicity.cc
x/i $pc:
0xb7eff13d <_ZN9__gnu_cxx18__exchange_and_addEPVii+9>: lock xadd %eax,(%edx)
backtrace:
#0 __gnu_cxx::__exchange_and_add (__mem=0xb7f32a8c, __val=1)
at atomicity.cc:41
#1 0xb7ec5b27 in Init (this=0xb7f32adc)
at /var/tmp/portage/sys-devel/gcc-4.1.2/work/gcc-4.1.2/libstdc++-v3/src/ios_init.cc:85
#2 0xb7ed43bb in __static_initialization_and_destruction_0 (
__initialize_p=<value optimized out>, __priority=-1208800628)
at /var/tmp/portage/sys-devel/gcc-4.1.2/work/build/i386-gentoo-linux-uclibc/libstdc++-v3/include/iostream:78
#3 0xb7f08c97 in __do_global_ctors_aux ()
from /usr/lib/gcc/i386-gentoo-linux-uclibc/4.1.2/libstdc++.so.6
#4 0xb7eb9f75 in _init ()
from /usr/lib/gcc/i386-gentoo-linux-uclibc/4.1.2/libstdc++.so.6
#5 0xb7f7726d in _dl_get_ready_to_run () from /lib/ld-uClibc.so.0
#6 0xb7f77541 in ?? () from /lib/ld-uClibc.so.0
#7 0xbff36cf0 in ?? ()
#8 0xb7f74000 in ?? ()
#9 0xbff36dd4 in ?? ()
#10 0xbff36e6c in ?? ()
#11 0xbff36e64 in ?? ()
#12 0x6fee8a4c in ?? ()
#13 0xb7f74000 in ?? ()
#14 0x00000002 in ?? ()
#15 0x00000000 in ?? ()
It seems so there is xadd in code, which is 486+ instruction.
My make.conf :
CFLAGS="-Os -march=i386 -pipe -ggdb"
CXXFLAGS="-Os -march=i386 -pipe -ggdb"
LDFLAGS="-Wl,-O1"
CHOST="i386-gentoo-linux-uclibc"
UCLIBC_CPU="386"
Gcc version is 4.1.2. What should I do in order to fix this problem?
Thanks in advance.