(gdb) b execve
Breakpoint 1 at 0x400b94
(gdb) set args /foo /bin/cat /proc/uptime
(gdb) r
Starting program: /usr/lib64/util-vserver/exec-ulimit /foo /bin/cat /proc/uptime
warning: shared library handler failed to enable breakpoint

Breakpoint 1, 0x0000000000400b94 in execve ()
(gdb) b __unified_syscall
Breakpoint 2 at 0x40062e
(gdb) c
Continuing.

Breakpoint 2, 0x000000000040062e in __unified_syscall ()
(gdb) disassemble
Dump of assembler code for function __unified_syscall:
0x000000000040062e <__unified_syscall+0>:       movzbl %al,%eax
0x0000000000400631 <__unified_syscall+3>:       mov    %rcx,%r10
0x0000000000400634 <__unified_syscall+6>:       syscall
0x0000000000400636 <__unified_syscall+8>:       cmp    $0xffffffffffffff80,%rax
0x000000000040063a <__unified_syscall+12>:      jbe    0x40064b <funlockfile>
0x000000000040063c <__unified_syscall+14>:      neg    %eax
0x000000000040063e <__unified_syscall+16>:      push   %rax
0x000000000040063f <__unified_syscall+17>:      callq  0x400690 <__errno_location>
0x0000000000400644 <__unified_syscall+22>:      pop    %rcx
0x0000000000400645 <__unified_syscall+23>:      mov    %ecx,(%rax)
0x0000000000400647 <__unified_syscall+25>:      or     $0xffffffffffffffff,%rax
End of assembler dump.
(gdb) break *0x0000000000400634
Breakpoint 3 at 0x400634
(gdb) c
Continuing.

Breakpoint 3, 0x0000000000400634 in __unified_syscall ()
(gdb) info registers
rax            0x3b     59
rbx            0x7fff97514f78   140735732076408
rcx            0x400636 4195894
rdx            0x7fff5407a427   140734603174951
rsi            0x7fff97514f78   140735732076408
rdi            0x7fff97515c78   140735732079736
rbp            0x7fff97515c78   0x7fff97515c78
rsp            0x7fff97505b48   0x7fff97505b48
r8             0x0      0
r9             0x0      0
r10            0x400636 4195894
r11            0x256    598
r12            0x7fff97514f90   140735732076432
r13            0x7fff97514f68   140735732076392
r14            0x7fff97514f68   140735732076392
r15            0x6      6
rip            0x400634 0x400634 <__unified_syscall+6>
eflags         0x206    [ PF IF ]
cs             0x33     51
ss             0x2b     43
ds             0x0      0
es             0x0      0
fs             0x0      0
gs             0x0      0
(gdb) dump memory gcc411-rdi.mem $rdi $rdi+1024
(gdb) dump memory gcc411-rsi.mem $rsi $rsi+1024
(gdb) dump memory gcc411-rdx.mem $rdx $rdx+1024
(gdb) dump memory gcc411-r10.mem $r10 $r10+1024