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[RFC][PATCH -tip 3/9] ia64: add kernel_trap_sp()
- From: Masami Hiramatsu <mhiramat at redhat dot com>
- To: "Luck, Tony" <tony dot luck at intel dot com>, Ingo Molnar <mingo at elte dot hu>
- Cc: LKML <linux-kernel at vger dot kernel dot org>, systemtap-ml <systemtap at sources dot redhat dot com>, Ananth N Mavinakayanahalli <ananth at in dot ibm dot com>, Steven Rostedt <rostedt at goodmis dot org>, ia64 <linux-ia64 at vger dot kernel dot org>
- Date: Thu, 19 Mar 2009 17:10:16 -0400
- Subject: [RFC][PATCH -tip 3/9] ia64: add kernel_trap_sp()
Add kernel_trap_sp() on ia64, based on systemtap's runtime/regs.h.
Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Tony Luck <tony.luck@intel.com>
---
arch/ia64/include/asm/ptrace.h | 6 ++++++
1 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/arch/ia64/include/asm/ptrace.h b/arch/ia64/include/asm/ptrace.h
index 14055c6..3a7dfcb 100644
--- a/arch/ia64/include/asm/ptrace.h
+++ b/arch/ia64/include/asm/ptrace.h
@@ -246,6 +246,12 @@ static inline unsigned long user_stack_pointer(struct pt_regs *regs)
return regs->ar_bspstore;
}
+static inline unsigned long kernel_trap_sp(struct pt_regs *regs)
+{
+ /* interrupted task's memory stack pointer is r12 */
+ return regs->r12;
+}
+
#define regs_return_value(regs) ((regs)->r8)
/* Conserve space in histogram by encoding slot bits in address
--
Masami Hiramatsu
Software Engineer
Hitachi Computer Products (America) Inc.
Software Solutions Division
e-mail: mhiramat@redhat.com