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| author | Greg Ungerer <gerg@uclinux.org> | 2009-07-07 15:54:54 +1000 |
|---|---|---|
| committer | Greg Ungerer <gerg@goober.(none)> | 2009-12-04 11:45:30 +1000 |
| commit | 193f087d492c566a211d01942c0f6b395f34f2ab (patch) | |
| tree | a87beb68a5b7c25b9b209425de789db5e984822b /arch/m68knommu | |
| parent | 588baeac38829304390b690142376d2c71ac5c9f (diff) | |
| download | linux-193f087d492c566a211d01942c0f6b395f34f2ab.tar.bz2 | |
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 <gerg@uclinux.org>
Diffstat (limited to 'arch/m68knommu')
| -rw-r--r-- | arch/m68knommu/kernel/ptrace.c | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/arch/m68knommu/kernel/ptrace.c b/arch/m68knommu/kernel/ptrace.c index ef70ca070ce2..4d3828959fb0 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) |