shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-08 03:40:35 +09:00
Code Issues Packages Projects Releases Wiki Activity

ARM: 7308/1: vfp: flush thread hwstate before copying ptrace registers

Browse Source 
commit 8130b9d7b9 upstream.

If we are context switched whilst copying into a thread's
vfp_hard_struct then the partial copy may be corrupted by the VFP
context switching code (see "ARM: vfp: flush thread hwstate before
restoring context from sigframe").

This patch updates the ptrace VFP set code so that the thread state is
flushed before the copy, therefore disabling VFP and preventing
corruption from occurring.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Will Deacon
2012-01-30 20:23:29 +01:00
committed by 黄涛
parent 7b93e41954
commit 1bfcac2772
1 changed files with 1 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
arch/arm/kernel/ptrace.c
View File

@@ -746,8 +746,8 @@ static int vfp_set(struct task_struct *target,
if (ret)
return ret;
thread->vfpstate.hard = new_vfp;
vfp_flush_hwstate(thread);
thread->vfpstate.hard = new_vfp;
return 0;
}