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authorGreg Ungerer <gerg@uclinux.org>2009-07-07 15:54:54 +1000
committerGeert Uytterhoeven <geert@linux-m68k.org>2009-12-06 11:18:23 +0100
commitf60a5572679ef8508b62bd82063b05ffbe838716 (patch)
tree73f8b9d774df1e700b132f4283758515090d8435
parentf195e2bff3000b8bc251ee6f685e0f027eec6f25 (diff)
downloadop-kernel-dev-f60a5572679ef8508b62bd82063b05ffbe838716.zip
op-kernel-dev-f60a5572679ef8508b62bd82063b05ffbe838716.tar.gz
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(). [Geert] m68k conflict resolution from linux-next Signed-off-by: Greg Ungerer <gerg@uclinux.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
-rw-r--r--arch/m68k/include/asm/ptrace.h2
-rw-r--r--arch/m68knommu/kernel/ptrace.c18
2 files changed, 16 insertions, 4 deletions
diff --git a/arch/m68k/include/asm/ptrace.h b/arch/m68k/include/asm/ptrace.h
index 117adb1..a6ab663 100644
--- a/arch/m68k/include/asm/ptrace.h
+++ b/arch/m68k/include/asm/ptrace.h
@@ -90,11 +90,11 @@ extern void show_regs(struct pt_regs *);
*/
struct task_struct;
-#ifdef 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 *);
+#ifdef CONFIG_MMU
#define arch_has_block_step() (1)
extern void user_enable_block_step(struct task_struct *);
#endif
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)
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