Re: atomic_cas_ulong_ni segmentation fault

[raymond.meyer%rambler.ru@localhost]

On Thursday 06 March 2008 13:58:26 Andrew Doran wrote:
> On Thu, Mar 06, 2008 at 01:36:58PM +0000, raymond.meyer%rambler.ru@localhost 
> wrote:
> > I'm running 32-bit sparc port of NetBSD 4.99.55 with netbsd_sun4u kernel
> > on Ultra 10. The userland and kernel were compiled
> > with '-Os -mcpu=ultrasparc -mvis'
> >
> > #include <stdio.h>
> > int main(void)
> > {
> >     printf("hey\n");
> >     return 0;
> > }
> >
> > If I compile the above program with 'gcc test.c -lpthread' and then run
> > the executable, it dies with SEGV.
> >
> > Running gdb on the core file outputs the following:
> >
> > Program terminated with signal 11, Segmentation fault
> > #0 0x40117324 in atomic_cas_ulong_ni () from /usr/lib/libc.so.12
>
> Please provide:
>
> - backtrace
> - dissasembly of atomic_cas_ulong_ni() (disassemble atomic_cas_ulong_ni)
> - registers (info reg)
>
> Thanks,
> Andrew

see attachement

Script started on Thu Mar  6 14:45:02 2008
# gdb a.out a.out.core
GNU gdb 6.5
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This GDB was configured as "sparc--netbsdelf"...(no debugging symbols found)

Reading symbols from /usr/lib/libpthread.so.0...(no debugging symbols 
found)...done.
Loaded symbols for /usr/lib/libpthread.so.0
Reading symbols from /usr/lib/libsparc_v8.so.0...(no debugging symbols 
found)...done.
Loaded symbols for /usr/lib/libsparc_v8.so.0
Reading symbols from /usr/lib/libc.so.12...
(no debugging symbols found)...done.
Loaded symbols for /usr/lib/libc.so.12
Reading symbols from /usr/libexec/ld.elf_so...(no debugging symbols 
found)...done.
Loaded symbols for /usr/libexec/ld.elf_so

Core was generated by `a.out'.
Program terminated with signal 11, Segmentation fault.
#0  0x40117324 in atomic_cas_ulong_ni () from /usr/lib/libc.so.12
(gdb) bt
#0  0x40117324 in atomic_cas_ulong_ni () from /usr/lib/libc.so.12
#1  0x400671d4 in pthread_mutex_lock () from /usr/lib/libpthread.so.0
#2  0x4012ba28 in free () from /usr/lib/libc.so.12
#3  0x4012cf9c in malloc () from /usr/lib/libc.so.12
#4  0x4010d264 in pthread_atfork () from /usr/lib/libc.so.12
#5  0x4006a2e0 in pthread__init () from /usr/lib/libpthread.so.0
#6  0x400dd264 in ether_ntohost () from /usr/lib/libc.so.12
#7  0x40170c94 in __errno () from /usr/lib/libc.so.12
#8  0x400c4fc4 in _init () from /usr/lib/libc.so.12
#9  0x40023a70 in _rtld_call_init_functions () from /usr/libexec/ld.elf_so
#10 0x40024414 in _rtld () from /usr/libexec/ld.elf_so
#11 0x40022ef4 in _rtld_start () from /usr/libexec/ld.elf_so
#12 0x40022ef4 in _rtld_start () from /usr/libexec/ld.elf_so
Previous frame identical to this frame (corrupt stack?)
(gdb) disassemble atomic_cas_ulong_ni
Dump of assembler code for function atomic_cas_ulong_ni:
0x40117314 <atomic_cas_ulong_ni+0>:     srl  %o0, 3, %o5
0x40117318 <atomic_cas_ulong_ni+4>:     and  %o5, 0x3ff, %o5
0x4011731c <atomic_cas_ulong_ni+8>:     sethi  %hi(0xfffffc00), %o3
0x40117320 <atomic_cas_ulong_ni+12>:    add  %o5, %o3, %o5
0x40117324 <atomic_cas_ulong_ni+16>:    ldstub  [ %o5 ], %o3
0x40117328 <atomic_cas_ulong_ni+20>:    tst  %o3
0x4011732c <atomic_cas_ulong_ni+24>:    be,a   0x40117344 
<atomic_cas_ulong_ni+48>
0x40117330 <atomic_cas_ulong_ni+28>:    nop 
0x40117334 <atomic_cas_ulong_ni+32>:    nop 
0x40117338 <atomic_cas_ulong_ni+36>:    nop 
0x4011733c <atomic_cas_ulong_ni+40>:    b,a   0x40117324 
<atomic_cas_ulong_ni+16>
0x40117340 <atomic_cas_ulong_ni+44>:    nop 
0x40117344 <atomic_cas_ulong_ni+48>:    ld  [ %o0 ], %o3
0x40117348 <atomic_cas_ulong_ni+52>:    cmp  %o1, %o3
0x4011734c <atomic_cas_ulong_ni+56>:    be,a   0x40117354 
<atomic_cas_ulong_ni+64>
0x40117350 <atomic_cas_ulong_ni+60>:    st  %o2, [ %o0 ]
0x40117354 <atomic_cas_ulong_ni+64>:    clrb  [ %o5 ]
0x40117358 <atomic_cas_ulong_ni+68>:    retl 
0x4011735c <atomic_cas_ulong_ni+72>:    mov  %o3, %o0
End of assembler dump.
(gdb) info reg
g0             0x0      0
g1             0x3000000        50331648
g2             0x81c06314       -2118098156
g3             0x310045c        51381340
g4             0xf0000000       -268435456
g5             0x0      0
g6             0x0      0
g7             0x0      0
o0             0x40192dbc       1075391932
o1             0x0      0
o2             0xffe00000       -2097152
o3             0xfffffc00       -1024
o4             0x0      0
o5             0xfffffdb7       -585
sp             0xffffc420       0xffffc420
o7             0x400671cc       1074164172
l0             0x0      0
l1             0x0      0
l2             0x0      0
l3             0x0      0
l4             0x0      0
l5             0x0      0
l6             0x0      0
l7             0x4007c0dc       1074249948
i0             0x40192dac       1075391916
i1             0x0      0
i2             0x0      0
i3             0x0      0
i4             0x0      0
i5             0x0      0
fp             0xffffc488       0xffffc488
i7             0x4012ba20       1074969120
y              0x0      0
psr            0x4400000        71303168
wim            0x0      0
tbr            0x0      0
pc             0x40117324       0x40117324 <atomic_cas_ulong_ni+16>
npc            0x40117328       0x40117328 <atomic_cas_ulong_ni+20>
fsr            0x400671cc       1074164172
csr            0x0      0
(gdb) quit
# ^D
Script done on Thu Mar  6 14:45:52 2008