(gdb) b execve
Breakpoint 1 at 0x400bd4
(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, 0x0000000000400bd4 in execve ()
(gdb) b __unified_syscall
Breakpoint 2 at 0x40065e
(gdb) c
Continuing.

Breakpoint 2, 0x000000000040065e in __unified_syscall ()
(gdb) disassemble
Dump of assembler code for function __unified_syscall:
0x000000000040065e <__unified_syscall+0>:       movzbl %al,%eax
0x0000000000400661 <__unified_syscall+3>:       mov    %rcx,%r10
0x0000000000400664 <__unified_syscall+6>:       syscall
0x0000000000400666 <__unified_syscall+8>:       cmp    $0xffffffffffffff80,%rax
0x000000000040066a <__unified_syscall+12>:      jbe    0x40067b <funlockfile>
0x000000000040066c <__unified_syscall+14>:      neg    %eax
0x000000000040066e <__unified_syscall+16>:      push   %rax
0x000000000040066f <__unified_syscall+17>:      callq  0x4006c0 <__errno_location>
0x0000000000400674 <__unified_syscall+22>:      pop    %rcx
0x0000000000400675 <__unified_syscall+23>:      mov    %ecx,(%rax)
0x0000000000400677 <__unified_syscall+25>:      or     $0xffffffffffffffff,%rax
End of assembler dump.
(gdb) break *0x0000000000400664
Breakpoint 3 at 0x400664
(gdb) c
Continuing.

Breakpoint 3, 0x0000000000400664 in __unified_syscall ()
(gdb) info registers
rax            0x3b     59
rbx            0x7fff6659aff8   140734910541816
rcx            0x400666 4195942
rdx            0x7fff6659b010   140734910541840
rsi            0x7fff6659aff8   140734910541816
rdi            0x7fff6659cc6d   140734910549101
rbp            0x7fff6659cc6d   0x7fff6659cc6d
rsp            0x7fff66598e68   0x7fff66598e68
r8             0x0      0
r9             0x0      0
r10            0x400666 4195942
r11            0x256    598
r12            0x7fff6659b010   140734910541840
r13            0x7fff6659afe8   140734910541800
r14            0x4      4
r15            0x0      0
rip            0x400664 0x400664 <__unified_syscall+6>
eflags         0x202    [ IF ]
cs             0x33     51
ss             0x2b     43
ds             0x0      0
es             0x0      0
fs             0x0      0
gs             0x0      0
(gdb) dump memory gcc346-rdi.mem $rdi $rdi+1024
(gdb) dump memory gcc346-rsi.mem $rsi $rsi+1024
(gdb) dump memory gcc346-rdx.mem $rdx $rdx+1024
(gdb) dump memory gcc346-r10.mem $r10 $r10+1024