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Commit f5bbd721 authored by Martin Schwidefsky's avatar Martin Schwidefsky
Browse files

s390/ptrace: guarded storage regset for the current task 



The regset functions for guarded storage are supposed to work on
the current task as well. For task == current add the required
load and store instructions for the guarded storage control block.

Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 53d7f25f

arch/s390/kernel/ptrace.c

+13 −2
Original line number Diff line number Diff line
@@ -1160,6 +1160,8 @@ static int s390_gs_cb_get(struct task_struct *target, 
		return -ENODEV;

	if (!data)

		return -ENODATA;

	if (target == current)

		save_gs_cb(data);

	return user_regset_copyout(&pos, &count, &kbuf, &ubuf,

				   data, 0, sizeof(struct gs_cb));

}
@@ -1170,6 +1172,7 @@ static int s390_gs_cb_set(struct task_struct *target, 
			  const void *kbuf, const void __user *ubuf)

{

	struct gs_cb *data = target->thread.gs_cb;

	int rc;



	if (!MACHINE_HAS_GS)

		return -ENODEV;
@@ -1177,10 +1180,18 @@ static int s390_gs_cb_set(struct task_struct *target, 
		data = kzalloc(sizeof(*data), GFP_KERNEL);

		if (!data)

			return -ENOMEM;

		data->gsd = 25;

		target->thread.gs_cb = data;

		if (target == current)

			__ctl_set_bit(2, 4);

	} else if (target == current) {

		save_gs_cb(data);

	}

	return user_regset_copyin(&pos, &count, &kbuf, &ubuf,

	rc = user_regset_copyin(&pos, &count, &kbuf, &ubuf,

				data, 0, sizeof(struct gs_cb));

	if (target == current)

		restore_gs_cb(data);

	return rc;

}



static int s390_gs_bc_get(struct task_struct *target,