lkml.org 
[lkml]   [2008]   [Nov]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [patch 15/21] ptrace changes
From
Date
On Mon, 2008-11-03 at 11:14 -0600, David Smith wrote: 

> Is this correct, or should the 1st syscall argument be found in
> regs->orig_gpr2 by syscall_get_arguments()/syscall_set_arguments()?

The question is when do syscall_get_arguments and syscall_set_arguments
functions get called? If they are called on a call chain that started
from do_syscall_trace_enter then we'd have to use orig_gpr2 instead of
gprs[2] but if the functions are not called via do_syscall_trace_enter
the first argument is located in grprs[2]. As far as I can see the sole
user of syscall_get_arguments is collect_syscall which is used to get
the registers of a blocked process. In this case the kernel call chain
does not include do_syscall_trace_enter, therefore the first argument is
in gprs[2], no?

--
blue skies,
Martin.

"Reality continues to ruin my life." - Calvin.




\
 
 \ /
  Last update: 2008-11-05 12:51    [W:0.073 / U:9.808 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site