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Commit c3311c13 authored by Martin Schwidefsky's avatar Martin Schwidefsky Committed by Martin Schwidefsky
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[S390] fix loading of PER control registers for utrace. 



If the current task enables / disables PER tracing for itself the
PER control registers need to be loaded in FixPerRegisters.

Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 7284ce6c

arch/s390/kernel/ptrace.c

+8 −0
Original line number Diff line number Diff line
@@ -65,6 +65,7 @@ FixPerRegisters(struct task_struct *task) 
{

	struct pt_regs *regs;

	per_struct *per_info;

	per_cr_words cr_words;



	regs = task_pt_regs(task);

	per_info = (per_struct *) &task->thread.per_info;
@@ -98,6 +99,13 @@ FixPerRegisters(struct task_struct *task) 
		per_info->control_regs.bits.storage_alt_space_ctl = 1;

	else

		per_info->control_regs.bits.storage_alt_space_ctl = 0;



	if (task == current) {

		__ctl_store(cr_words, 9, 11);

		if (memcmp(&cr_words, &per_info->control_regs.words,

			   sizeof(cr_words)) != 0)

			__ctl_load(per_info->control_regs.words, 9, 11);

	}

}



void user_enable_single_step(struct task_struct *task)