register dump from iptables failure

BAD.reg (text/plain), 3.66 KB, created by Wormo (RETIRED) on 2006-07-19 22:51:30 UTC

BEFORE SYSCALL
--------------
(gdb) info registers
r0             0x66     102
r1             0x7fcde360       2144199520
r2             0x100ce3e0       269280224
r3             0xf      15
r4             0x7fcde374       2144199540
r5             0x42     66
r6             0x7fcde3b0       2144199600
r7             0x7fcde3d0       2144199632
r8             0x7f7f7f7f       2139062143
r9             0x7fcde3d0       2144199632
r10            0x74000000       1946157056
r11            0xce6c23c8       3463193544
r12            0xd6138000       3591602176
r13            0x100cd358       269275992
r14            0x100c0000       269221888
r15            0x100cceb0       269274800
r16            0x0      0
r17            0xffffffff       4294967295
r18            0x10060000       268828672
r19            0x0      0
r20            0x100002cc       268436172
r21            0x100c0000       269221888
r22            0x1002a0d0       268607696
r23            0x1002a198       268607896
r24            0x0      0
r25            0x7fcde6b4       2144200372
r26            0x2      2
r27            0x7fcde76c       2144200556
r28            0x0      0
r29            0x100c0000       269221888
r30            0xff5ae5c        267759196
r31            0x7fcde390       2144199568
pc             0x1004990c       268736780
ps             0xd032   53298
cr             0x22000024       570425380
lr             0x100027a0       268445600
ctr            0xc011d7dc       3222394844
xer            0x0      0
fpscr          0x0      0
vscr           0x0      0
vrsave         0x0      0

(gdb) print ((int *)0x7fcde374)[0]
$16 = 6
(gdb) print ((int *)0x7fcde374)[1]
$17 = 0
(gdb) print ((int *)0x7fcde374)[2]
$18 = 66
(gdb) print /x ((int *)0x7fcde374)[3]
$19 = 0x7fdf03b0
(gdb) print /x ((int *)0x7fcde374)[4]
$20 = 0x7fdf03d0

# r0 is syscall number (_NR_socketcall = 102)
# r1 is stack pointer 
# r2 -- NOT USED
# r3 is socket call type (SYS_GETSOCKOPT = 15)
# r4 points to remainder of args
#   fd = sockfd = 6
#   level = IPPROTO_IP = 0
#   optname = IPT_SO_GET_REVISION_MATCH = 66
#   optval = &rev = 0x7fa3b3b0
#   optlen = &s = 0x7fa3b3d0

AFTER SYSCALL
-------------
(gdb) info registers
r0             0x0      0
r1             0x7fcde390       2144199568
r2             0x100ce3e0       269280224
r3             0x2      2
r4             0x100027a0       268445600
r5             0x32000024       838860836
r6             0xfffffffe       4294967294
r7             0x10049910       268736784
r8             0xd432   54322
r9             0x0      0
r10            0x1032   4146
r11            0x32000024       838860836
r12            0xd6138000       3591602176
r13            0x100cd358       269275992
r14            0x100c0000       269221888
r15            0x100cceb0       269274800
r16            0x0      0
r17            0xffffffff       4294967295
r18            0x10060000       268828672
r19            0x0      0
r20            0x100002cc       268436172
r21            0x100c0000       269221888
r22            0x1002a0d0       268607696
r23            0x1002a198       268607896
r24            0x0      0
r25            0x7fcde6b4       2144200372
r26            0x2      2
r27            0x7fcde76c       2144200556
r28            0x0      0
r29            0x100c0000       269221888
r30            0xff5ae5c        267759196
r31            0x7fcde390       2144199568
pc             0x10049914       268736788
ps             0xd032   53298
cr             0x32000024       838860836
lr             0x100027a0       268445600
ctr            0xc0011f90       3221299088
xer            0x20000000       536870912
fpscr          0x0      0
vscr           0x0      0
vrsave         0x0      0

# r3 has return value (ENOENT = 2)