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From: <tronics93-gdb@yahoo.com>
To: gdb@sources.redhat.com
Subject: Re: gdb 6.3 misses breakpoint on Linux when inferior does clone()
Date: Tue, 31 May 2005 17:06:00 -0000	[thread overview]
Message-ID: <20050531170523.45257.qmail@web31913.mail.mud.yahoo.com> (raw)

>> The kernel does not provide any interface for GDB to know whether
or
>> not a clone syscall has used CLONE_VM.   
>> 
>> [Satish] Doesn't ptrace(PTRACE_GETREGS,...) provide that
information >>? Or is that arch. specific ?

>No, it does not.

The following code snippet gets the flags passed in to clone() (on
x86):

   unsigned long regs[FRAME_SIZE];

   if (ptrace(PTRACE_GETREGS, pid, 0, &regs) < 0)
        perror("ptrace_getregs failed:");

   printf("syscall=%d, arg1=%#x, arg2=%#x\n", regs[ORIG_EAX], 
                              regs[EBX], regs[ECX]);

--tronics93.

             reply	other threads:[~2005-05-31 17:06 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-05-31 17:06 tronics93-gdb [this message]
2005-06-01 13:23 ` Daniel Jacobowitz
2005-06-11 23:31   ` Mark Kettenis
2005-06-12  0:23     ` Daniel Jacobowitz
  -- strict thread matches above, loose matches on Subject: below --
2005-05-26 20:02 Satish Mohan
2005-05-26 20:03 ` Daniel Jacobowitz
2005-05-26 19:40 Satish Mohan
2005-05-26 19:43 ` Daniel Jacobowitz

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