xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

sh: Fix up DSP context save/restore.

Browse Source 
There were a number of issues with the DSP context save/restore code,
mostly left-over relics from when it was introduced on SH3-DSP with
little follow-up testing, resulting in things like task_pt_dspregs()
referencing incorrect state on the stack.

This follows the MIPS convention of tracking the DSP state in the
thread_struct and handling the state save/restore in switch_to() and
finish_arch_switch() respectively. The regset interface is also updated,
which allows us to finally be rid of task_pt_dspregs() and the special
cased task_pt_regs().

Signed-off-by: Michael Trimarchi <michael@evidence.eu.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Michael Trimarchi
2009-04-03 17:32:33 +00:00
committed by Paul Mundt
parent a27873cd23
commit 01ab10393c
7 changed files with 161 additions and 137 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
arch/sh/kernel/ptrace_32.c
View File

@@ -200,7 +200,8 @@ static int dspregs_get(struct task_struct *target,
unsigned int pos, unsigned int count,
void *kbuf, void __user *ubuf)
{
const struct pt_dspregs *regs = task_pt_dspregs(target);
const struct pt_dspregs *regs =
(struct pt_dspregs *)&target->thread.dsp_status.dsp_regs;
int ret;
ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, regs,
@@ -217,7 +218,8 @@ static int dspregs_set(struct task_struct *target,
unsigned int pos, unsigned int count,
const void *kbuf, const void __user *ubuf)
{
struct pt_dspregs *regs = task_pt_dspregs(target);
struct pt_dspregs *regs =
(struct pt_dspregs *)&target->thread.dsp_status.dsp_regs;
int ret;
ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, regs,