diff options
| 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 | |
| parent | 588baeac38829304390b690142376d2c71ac5c9f (diff) | |
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>
| -rw-r--r-- | arch/m68k/include/asm/ptrace.h | 12 | ||||
| -rw-r--r-- | arch/m68knommu/kernel/ptrace.c | 18 |
2 files changed, 27 insertions, 3 deletions
diff --git a/arch/m68k/include/asm/ptrace.h b/arch/m68k/include/asm/ptrace.h index 8c9194b98548..beb209195871 100644 --- a/arch/m68k/include/asm/ptrace.h +++ b/arch/m68k/include/asm/ptrace.h @@ -82,6 +82,18 @@ struct switch_stack { #define instruction_pointer(regs) ((regs)->pc) #define profile_pc(regs) instruction_pointer(regs) extern void show_regs(struct pt_regs *); + +/* + * These are defined as per linux/ptrace.h. + */ +struct task_struct; + +#ifndef CONFIG_MMU +#define arch_has_single_step() (1) +extern void user_enable_single_step(struct task_struct *); +extern void user_disable_single_step(struct task_struct *); +#endif + #endif /* __KERNEL__ */ #endif /* __ASSEMBLY__ */ #endif /* _M68K_PTRACE_H */ 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) |