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: Martin Schwidefsky <schwidefsky@de.ibm.com>
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@ -1160,6 +1160,8 @@ static int s390_gs_cb_get(struct task_struct *target,
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return -ENODEV;
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if (!data)
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return -ENODATA;
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if (target == current)
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save_gs_cb(data);
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return user_regset_copyout(&pos, &count, &kbuf, &ubuf,
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data, 0, sizeof(struct gs_cb));
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}
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@ -1170,6 +1172,7 @@ static int s390_gs_cb_set(struct task_struct *target,
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const void *kbuf, const void __user *ubuf)
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{
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struct gs_cb *data = target->thread.gs_cb;
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int rc;
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if (!MACHINE_HAS_GS)
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return -ENODEV;
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@ -1177,10 +1180,18 @@ static int s390_gs_cb_set(struct task_struct *target,
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data = kzalloc(sizeof(*data), GFP_KERNEL);
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if (!data)
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return -ENOMEM;
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data->gsd = 25;
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target->thread.gs_cb = data;
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if (target == current)
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__ctl_set_bit(2, 4);
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} else if (target == current) {
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save_gs_cb(data);
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}
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return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
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rc = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
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data, 0, sizeof(struct gs_cb));
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if (target == current)
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restore_gs_cb(data);
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return rc;
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}
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static int s390_gs_bc_get(struct task_struct *target,
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