Description of problem:
   In RHEL5, if a debuggee execute a misc/script binary, SIGTRAP will be sent 
twice to itself, so that debugger will receive TWO SIGCHLD. After investigate,
the problem is that the notify procedure (fuction "tracehook_report_exec"  ) 
is put in function "search_binary_hanlder", rather than in "load_elf_binary" 
as in RHEL4.
   SO the logic of execute a misc/script binary will belike this:
   do_execve ( )
       |___ search_binary_handler ( )
           |___load_misc_bianry ( )
           |    |___search_bianry_handler ( )
           |        |___ load_elf_binary ( )
           |        |___  tracehook_report_exec ( )
           |___ tracehook_report_exec( )

obviously, "tracehook_report_exec" will be called twice, which send TWO 
SIGTRAP. 
    ia32el depend on load_misc_bianry to simulate 32-bit binary, so if use 32-
bit gdb to debug 32-bit app on ia32el, gdb will get a extra SIGCHLD.

   
    For simply reporduce the problem, attached is a 64-bit case using ptrace 
to attach a child while execute a script and check the status.Normally, parent 
should receive ONE sigchld when child(debugee) call "execve", but in this 
case, it receive TWICE since child execute a script.

 



Version-Release number of selected component (if applicable):


How reproducible:


Steps to Reproduce:
1.compile the attached file natively: make ptrace_exec64
2.Run : ./ptrace_exec64
3.Get assert failure
  
Actual results:


Expected results:


Additional info: