Commit f5bbd721 authored by Martin Schwidefsky's avatar Martin Schwidefsky

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
......@@ -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,
......
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