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-rw-r--r--arch/s390/kernel/ptrace.c13
1 files changed, 12 insertions, 1 deletions
diff --git a/arch/s390/kernel/ptrace.c b/arch/s390/kernel/ptrace.c
index f6be608..4ac8faf 100644
--- a/arch/s390/kernel/ptrace.c
+++ b/arch/s390/kernel/ptrace.c
@@ -85,7 +85,10 @@ void update_cr_regs(struct task_struct *task)
/* merge TIF_SINGLE_STEP into user specified PER registers. */
if (test_tsk_thread_flag(task, TIF_SINGLE_STEP)) {
- new.control |= PER_EVENT_IFETCH;
+ if (test_tsk_thread_flag(task, TIF_BLOCK_STEP))
+ new.control |= PER_EVENT_BRANCH;
+ else
+ new.control |= PER_EVENT_IFETCH;
#ifdef CONFIG_64BIT
new.control |= PER_CONTROL_SUSPENSION;
new.control |= PER_EVENT_TRANSACTION_END;
@@ -107,14 +110,22 @@ void update_cr_regs(struct task_struct *task)
void user_enable_single_step(struct task_struct *task)
{
+ clear_tsk_thread_flag(task, TIF_BLOCK_STEP);
set_tsk_thread_flag(task, TIF_SINGLE_STEP);
}
void user_disable_single_step(struct task_struct *task)
{
+ clear_tsk_thread_flag(task, TIF_BLOCK_STEP);
clear_tsk_thread_flag(task, TIF_SINGLE_STEP);
}
+void user_enable_block_step(struct task_struct *task)
+{
+ set_tsk_thread_flag(task, TIF_SINGLE_STEP);
+ set_tsk_thread_flag(task, TIF_BLOCK_STEP);
+}
+
/*
* Called by kernel/ptrace.c when detaching..
*
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