lkml.org 
[lkml]   [2015]   [Jul]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[RFC PATCH 01/12] powerpc/kernel: Get pt_regs from r9 before calling do_syscall_trace_enter()
Date
To call do_syscall_trace_enter() we need pt_regs in r3, but we don't need
to recalculate it based on r1, it's already in r9.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
---
arch/powerpc/kernel/entry_64.S | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S
index 579e0f9a2d57..0796c487d3db 100644
--- a/arch/powerpc/kernel/entry_64.S
+++ b/arch/powerpc/kernel/entry_64.S
@@ -243,7 +243,9 @@ syscall_error:
/* Traced system call support */
syscall_dotrace:
bl save_nvgprs
- addi r3,r1,STACK_FRAME_OVERHEAD
+
+ /* Get pt_regs into r3 */
+ mr r3, r9
bl do_syscall_trace_enter
/*
* Restore argument registers possibly just changed.
--
2.1.0


\
 
 \ /
  Last update: 2015-07-15 09:41    [W:0.157 / U:0.608 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site