lkml.org 
[lkml]   [2006]   [Mar]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: What is ptrace flag PT_TRACESYSGOOD for?
On Wed, Mar 15, 2006 at 12:00:56AM +0100, Pavel Machek wrote:
> Yes.. and unless you deliver ptrace() syscall stops with different
> signal, you can't tell difference between syscall stop and real
> SIGTRAP.

You can, but you have to examine registers in order to do this. This
is a concern when running gdb inside UML. gdb breakpoints will cause
real SIGTRAPs, while system calls cause synthetic ones. Before
switching to TRACESYS_GOOD, UML examined orig_eax to distinguish
between them.

Jeff
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2006-03-15 02:14    [W:0.076 / U:0.368 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site