From: Doug Evans <dje@google.com>
To: gdb@sourceware.org
Subject: Re: i386 int3 handling, running vs stepping
Date: Sun, 01 Feb 2009 23:38:00 -0000 [thread overview]
Message-ID: <e394668d0902011538r418676abif20e7413c70db84e@mail.gmail.com> (raw)
In-Reply-To: <20090201233251.GA27142@caradoc.them.org>
On Sun, Feb 1, 2009 at 3:32 PM, Daniel Jacobowitz <drow@false.org> wrote:
> On Sun, Feb 01, 2009 at 03:18:19PM -0800, Doug Evans wrote:
>
>> Trying things again, this time stepi'ing over the insn:
>>
>> bash$ gdb int3
>> (gdb) start
>> [...]
>> Temporary breakpoint 1, main () at int3.S:4
>> 4 nop
>> Current language: auto; currently asm
>> (gdb) si
>> 5 int3
>> (gdb) si
>> 6 nop
>> (gdb)
>>
>> Note that int3 was stepping over without a SIGTRAP being generated.
>
> I can't see a plausible way around this, can you? The SIGTRAP is
> identical to the one for PTRACE_SINGLESTEP - unless the kernel
> annotates the siginfo differently?
I haven't looked into siginfo, but can gdb look at the insn? [akin to
displaced stepping handling]
next prev parent reply other threads:[~2009-02-01 23:38 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-02-01 23:18 Doug Evans
2009-02-01 23:33 ` Daniel Jacobowitz
2009-02-01 23:38 ` Doug Evans [this message]
2009-02-02 4:25 ` Daniel Jacobowitz
2009-02-02 20:03 ` Doug Evans
2009-02-02 21:49 ` Daniel Jacobowitz
2009-02-03 1:26 ` Doug Evans
2009-02-03 4:08 ` Daniel Jacobowitz
2009-02-03 9:22 ` Mark Kettenis
2009-02-02 0:52 ` Doug Evans
2009-02-02 6:08 ` Robert Dewar
2009-02-02 6:19 ` teawater
2009-02-03 9:21 ` Mark Kettenis
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