Commit 5429b060 authored by Lennert Buytenhek's avatar Lennert Buytenhek Committed by Russell King

[ARM] 3665/1: crunch: add ptrace support

Patch from Lennert Buytenhek

This patch makes it possible to get/set a task's Crunch state via
the ptrace(2) system call.
Signed-off-by: default avatarLennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 3bec6ded
......@@ -634,6 +634,32 @@ static int ptrace_setwmmxregs(struct task_struct *tsk, void __user *ufp)
#endif
#ifdef CONFIG_CRUNCH
/*
* Get the child Crunch state.
*/
static int ptrace_getcrunchregs(struct task_struct *tsk, void __user *ufp)
{
struct thread_info *thread = task_thread_info(tsk);
crunch_task_disable(thread); /* force it to ram */
return copy_to_user(ufp, &thread->crunchstate, CRUNCH_SIZE)
? -EFAULT : 0;
}
/*
* Set the child Crunch state.
*/
static int ptrace_setcrunchregs(struct task_struct *tsk, void __user *ufp)
{
struct thread_info *thread = task_thread_info(tsk);
crunch_task_release(thread); /* force a reload */
return copy_from_user(&thread->crunchstate, ufp, CRUNCH_SIZE)
? -EFAULT : 0;
}
#endif
long arch_ptrace(struct task_struct *child, long request, long addr, long data)
{
unsigned long tmp;
......@@ -765,6 +791,16 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
child->ptrace_message = data;
break;
#ifdef CONFIG_CRUNCH
case PTRACE_GETCRUNCHREGS:
ret = ptrace_getcrunchregs(child, (void __user *)data);
break;
case PTRACE_SETCRUNCHREGS:
ret = ptrace_setcrunchregs(child, (void __user *)data);
break;
#endif
default:
ret = ptrace_request(child, request, addr, data);
break;
......
......@@ -25,6 +25,11 @@
#define PTRACE_SET_SYSCALL 23
/* PTRACE_SYSCALL is 24 */
#define PTRACE_GETCRUNCHREGS 25
#define PTRACE_SETCRUNCHREGS 26
/*
* PSR bits
*/
......
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