From 193f087d492c566a211d01942c0f6b395f34f2ab Mon Sep 17 00:00:00 2001 From: Greg Ungerer Date: Tue, 7 Jul 2009 15:54:54 +1000 Subject: m68knommu: define arch_has_single_step() and friends Towards adding CONFIG_UTRACE support for non-mmu m68k add arch_has_single_step, and its support functions user_enable_single_step() and user_disable_single_step(). Signed-off-by: Greg Ungerer --- arch/m68knommu/kernel/ptrace.c | 18 +++++++++++++++--- 1 file changed, 15 insertions(+), 3 deletions(-) (limited to 'arch/m68knommu') diff --git a/arch/m68knommu/kernel/ptrace.c b/arch/m68knommu/kernel/ptrace.c index ef70ca0..4d38289 100644 --- a/arch/m68knommu/kernel/ptrace.c +++ b/arch/m68knommu/kernel/ptrace.c @@ -86,6 +86,20 @@ static inline int put_reg(struct task_struct *task, int regno, return 0; } +void user_enable_single_step(struct task_struct *task) +{ + unsigned long srflags; + srflags = get_reg(task, PT_SR) | (TRACE_BITS << 16); + put_reg(task, PT_SR, srflags); +} + +void user_disable_single_step(struct task_struct *task) +{ + unsigned long srflags; + srflags = get_reg(task, PT_SR) & ~(TRACE_BITS << 16); + put_reg(task, PT_SR, srflags); +} + /* * Called by kernel/ptrace.c when detaching.. * @@ -93,10 +107,8 @@ static inline int put_reg(struct task_struct *task, int regno, */ void ptrace_disable(struct task_struct *child) { - unsigned long tmp; /* make sure the single step bit is not set. */ - tmp = get_reg(child, PT_SR) & ~(TRACE_BITS << 16); - put_reg(child, PT_SR, tmp); + user_disable_single_step(child); } long arch_ptrace(struct task_struct *child, long request, long addr, long data) -- cgit v1.1