Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

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

[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

arch/arm/kernel/ptrace.c

+36 −0
Original line number Diff line number Diff line
@@ -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;

include/asm-arm/ptrace.h

+5 −0
Original line number Diff line number Diff line
@@ -25,6 +25,11 @@ 


#define PTRACE_SET_SYSCALL	23



/* PTRACE_SYSCALL is 24 */



#define PTRACE_GETCRUNCHREGS	25

#define PTRACE_SETCRUNCHREGS	26



/*

 * PSR bits

 */