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Hi, |
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I'm searching how to resolv since some times and I think I shoud ask |
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for help :). |
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I'm cross-compilating with crossdev-wrappers from x86_64-pc-linux-gnu |
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to i586-geode-linux-uclibc with gcc 3.4.6-r2, kernel 2.6.28-r1 and |
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libc/libthread_old 0.9.30.1-r1. All almost compile fine and work good, but not software |
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linked with libpthread and doing setrlimit like e2fsprogs with chattr : |
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|
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# chattr |
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Segmentation fault |
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|
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And I get the following line in dmesg : |
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[470178.800998] chattr[6143]: segfault at 1ffe61 ip 00000000f7f59bd0 sp 00000000ffdca3c4 error 4 in libpthread-0.9.30.1.so[f7f55000+b000] |
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|
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strace give the following : |
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|
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ioctl(0, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0 |
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ioctl(1, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0 |
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getpid() = 7492 |
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getrlimit(RLIMIT_STACK, {rlim_cur=8192*1024, rlim_max=RLIM_INFINITY}) = 0 |
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setrlimit(RLIMIT_STACK, {rlim_cur=2040*1024, rlim_max=RLIM_INFINITY}) = 0 |
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rt_sigaction(SIGRTMIN, {0xf7f31109, [], SA_RESTORER, 0xf7f4766b}, NULL, 8) = 0 |
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rt_sigaction(SIGRT_1, {0xf7f31185, [RTMIN], SA_RESTORER, 0xf7f4766b}, NULL, 8) = 0 |
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rt_sigaction(SIGRT_2, {0xf7f3126f, [], SA_RESTORER, 0xf7f4766b}, NULL, 8) = 0 |
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rt_sigprocmask(SIG_BLOCK, [RTMIN], NULL, 8) = 0 |
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rt_sigprocmask(SIG_UNBLOCK, [RT_1], NULL, 8) = 0 |
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--- SIGSEGV (Segmentation fault) @ 0 (0) --- |
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|
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and gdb : |
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This GDB was configured as "i586-geode-linux-uclibc"... |
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(gdb) run |
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Starting program: /bin/chattr |
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[Thread debugging using libthread_db enabled] |
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[New Thread 0x400 (LWP 7575)] |
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|
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Program received signal SIGSEGV, Segmentation fault. |
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[Switching to Thread 0x400 (LWP 7575)] |
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0xf7f07bd0 in _pthread_cleanup_push_defer () from /lib/libpthread.so.0 |
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(gdb) bt |
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#0 0xf7f07bd0 in _pthread_cleanup_push_defer () from /lib/libpthread.so.0 |
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(gdb) br |
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Breakpoint 1 at 0xf7f07bd0 |
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|
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When I compile uclibc with debug USE flags, all works fine. That's a |
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bit perturbing. |
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|
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First, I don't understand why gdb can't give me more debug information, |
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even if I build with CFLAGS=-g and FEATURES=nostrip |
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|
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Second, I don't understand why this is working when debug is activated. |
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I can't run device with a 51MB libc which is slowing down almost |
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everything. |
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chattr is just an eemple, but that's the same with other |
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libpthread/setrlimit using software. |
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You'll find attahed the uclibc .config. |
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Thanks for your help |
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-- |
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Beber |
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