linux-kernel - [RFC][PATCH -tip 5/9] s390: add kernel_trap

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Date:	Thu, 19 Mar 2009 17:10:30 -0400
From:	Masami Hiramatsu <mhiramat@...hat.com>
To:	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Ingo Molnar <mingo@...e.hu>
CC:	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	systemtap-ml <systemtap@...rces.redhat.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Steven Rostedt <rostedt@...dmis.org>
Subject: [RFC][PATCH -tip 5/9] s390: add kernel_trap_sp()

Add kernel_trap_sp() on s390 (and cleanup a bit), based on systemtap's
runtime/regs.h.

Signed-off-by: Masami Hiramatsu <mhiramat@...hat.com>
Cc: Martin Schwidefsky <schwidefsky@...ibm.com>
---
 arch/s390/include/asm/ptrace.h |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/s390/include/asm/ptrace.h b/arch/s390/include/asm/ptrace.h
index 8920025..304b413 100644
--- a/arch/s390/include/asm/ptrace.h
+++ b/arch/s390/include/asm/ptrace.h
@@ -491,8 +491,9 @@ extern void user_disable_single_step(struct task_struct *);

 #define user_mode(regs) (((regs)->psw.mask & PSW_MASK_PSTATE) != 0)
 #define instruction_pointer(regs) ((regs)->psw.addr & PSW_ADDR_INSN)
-#define user_stack_pointer(regs)((regs)->gprs[15])
-#define regs_return_value(regs)((regs)->gprs[2])
+#define user_stack_pointer(regs) ((regs)->gprs[15])
+#define kernel_trap_sp(regs) (user_stack_pointer(regs))
+#define regs_return_value(regs) ((regs)->gprs[2])
 #define profile_pc(regs) instruction_pointer(regs)
 extern void show_regs(struct pt_regs * regs);
 #endif /* __KERNEL__ */
-- 
Masami Hiramatsu

Software Engineer
Hitachi Computer Products (America) Inc.
Software Solutions Division

e-mail: mhiramat@...hat.com


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