[PATCH 4] ptrace: implement user_single_step_siginfo()

[Oleg Nesterov]

(already in mm: ptrace-powerpc-implement-user_single_step_siginfo.patch)

Suggested by Roland.

Implement user_single_step_siginfo() for powerpc.

Signed-off-by: Oleg Nesterov <o...@redhat.com>
Acked-by: Roland McGrath <rol...@redhat.com>
---

 arch/powerpc/include/asm/ptrace.h |    2 ++
 arch/powerpc/kernel/traps.c       |    9 +++++++++
 2 files changed, 11 insertions(+)

--- V1/arch/powerpc/include/asm/ptrace.h~4_PPC_HELPER   2009-06-16 
17:01:38.000000000 +0200
+++ V1/arch/powerpc/include/asm/ptrace.h        2009-11-22 20:16:17.000000000 
+0100
@@ -140,6 +140,8 @@ extern void user_enable_single_step(stru
 extern void user_enable_block_step(struct task_struct *);
 extern void user_disable_single_step(struct task_struct *);
 
+#define ARCH_HAS_USER_SINGLE_STEP_INFO
+
 #endif /* __ASSEMBLY__ */
 
 #endif /* __KERNEL__ */
--- V1/arch/powerpc/kernel/traps.c~4_PPC_HELPER 2009-06-16 17:01:38.000000000 
+0200
+++ V1/arch/powerpc/kernel/traps.c      2009-11-22 20:16:17.000000000 +0100
@@ -174,6 +174,15 @@ int die(const char *str, struct pt_regs 
        return 0;
 }
 
+void user_single_step_siginfo(struct task_struct *tsk,
+                               struct pt_regs *regs, siginfo_t *info)
+{
+       memset(info, 0, sizeof(*info));
+       info->si_signo = SIGTRAP;
+       info->si_code = TRAP_TRACE;
+       info->si_addr = (void __user *)regs->nip;
+}
+
 void _exception(int signr, struct pt_regs *regs, int code, unsigned long addr)
 {
        siginfo_t info;