Catching exec on Intel Linux

[Datoda]

Hi,

   I use PTRACE_SYSCALL to trace system calls.
Ususally, PTRACE_SYSCALL stops twice for each system
call (once at the entry and the other time at the exit
of the system call). But for execve system call,
PTRACE_SYSCALL stops three times (once at the entry
and twice at the exit, it seems to me). Is there an
explanation for this anomaly? Thanks. 

__________________________________________________
Do You Yahoo!?
Yahoo! Finance - Get real-time stock quotes
http://finance.yahoo.com