GNU gdb 2002-04-01-cvs
Copyright 2002 Free Software Foundation, Inc.
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This GDB was configured as "mipsel-linux"...(no debugging symbols found)...
Core was generated by `/usr/bin/X11/X -dpi 100 -nolisten tcp'.
Program terminated with signal 4, Illegal instruction.
Reading symbols from /usr/lib/libz.so.1...(no debugging symbols found)...done.
Loaded symbols for /usr/lib/libz.so.1
Reading symbols from /lib/libm.so.6...(no debugging symbols found)...done.
Loaded symbols for /lib/libm.so.6
Reading symbols from /lib/libc.so.6...(no debugging symbols found)...done.
Loaded symbols for /lib/libc.so.6
Reading symbols from /lib/ld.so.1...(no debugging symbols found)...done.
Loaded symbols for /lib/ld.so.1
Reading symbols from /lib/libnss_files.so.2...(no debugging symbols found)...
done.
Loaded symbols for /lib/libnss_files.so.2

    GDB is unable to find the start of the function at 0x7fff7600
and thus can't determine the size of that function's stack frame.
This means that GDB may be unable to access that stack frame, or
the frames below it.
    This problem is most likely caused by an invalid program counter or
stack pointer.
    However, if you think GDB should simply search farther back
from 0x7fff7600 for code which looks like the beginning of a
function, you can increase the range of the search using the `set
heuristic-fence-post' command.
#0  0x7fff7600 in ?? ()
(gdb) where
#0  0x7fff7600 in ?? ()
(gdb) disass 0x7fff7580 0x7fff7680
Dump of assembler code from 0x7fff7580 to 0x7fff7680:
0x7fff7580:	nop
0x7fff7584:	nop
0x7fff7588:	nop
0x7fff758c:	nop
0x7fff7590:	nop
0x7fff7594:	nop
0x7fff7598:	nop
0x7fff759c:	nop
0x7fff75a0:	nop
0x7fff75a4:	nop
0x7fff75a8:	nop
0x7fff75ac:	nop
0x7fff75b0:	nop
0x7fff75b4:	nop
0x7fff75b8:	nop
0x7fff75bc:	nop
0x7fff75c0:	nop
0x7fff75c4:	nop
0x7fff75c8:	nop
0x7fff75cc:	nop
0x7fff75d0:	nop
0x7fff75d4:	beq	at,t3,0x80003ef8
0x7fff75d8:	sllv	zero,zero,zero
0x7fff75dc:	0xe
0x7fff75e0:	beq	zero,gp,0x7ffef244
0x7fff75e4:	beq	zero,t0,0x800012e8
0x7fff75e8:	0x7fff7600
0x7fff75ec:	beq	zero,t2,0x7ffd98b0
0x7fff75f0:	sd	ra,-1(ra)
0x7fff75f4:	sd	ra,-1(ra)
0x7fff75f8:	slti	sp,s6,-25040
0x7fff75fc:	beq	zero,t2,0x7ffd9cc0
0x7fff7600:	li	v0,4119
0x7fff7604:	syscall
0x7fff7608:	0x12c
0x7fff760c:	lb	a0,-19437(zero)
0x7fff7610:	slti	s1,s6,17812
0x7fff7614:	nop
0x7fff7618:	nop
0x7fff761c:	nop
0x7fff7620:	0xcf9210
0x7fff7624:	nop
0x7fff7628:	mfhi	zero
0x7fff762c:	nop
0x7fff7630:	beq	zero,at,0x8000caa4
0x7fff7634:	nop
0x7fff7638:	0xe
0x7fff763c:	nop
0x7fff7640:	slti	v0,k1,28680
0x7fff7644:	nop
0x7fff7648:	0x1228
0x7fff764c:	nop
0x7fff7650:	nop
0x7fff7654:	nop
0x7fff7658:	multu	zero,zero
0x7fff765c:	nop
0x7fff7660:	nop
0x7fff7664:	nop
0x7fff7668:	slti	t9,s7,17756
0x7fff766c:	nop
0x7fff7670:	beq	at,t3,0x7fff6f04
0x7fff7674:	nop
0x7fff7678:	0x12c
0x7fff767c:	nop
End of assembler dump.
(gdb) info regs
(gdb) info regs 
          zero       at       v0       v1       a0       a1       a2       a3
 R0   00000000 b004b400 ffffffff ffffffff 00000001 7fff73f8 00000000 00000000 
            t0       t1       t2       t3       t4       t5       t6       t7
 R8   0000b400 00000000 00000000 00000000 00000000 822b2880 822b2900 00000000 
            s0       s1       s2       s3       s4       s5       s6       s7
 R16  00000000 102b3248 00000004 0000000e 101cdf18 102b1820 00000001 00000000 
            t8       t9       k0       k1       gp       sp       s8       ra
 R24  00000000 006c86ec 00000000 00000000 10082740 7fff75f0 7fff7d08 7fff7600 
            sr       lo       hi      bad    cause       pc
      a004b413 00000002 00000000 8009c6a0 00000028 7fff7600 
           fsr      fir       fp
      00800004 00000000 00000000 
(gdb) quit