[RFC][PATCH -tip 3/9] ia64: add kernel_trap_sp()

[Masami Hiramatsu]

Add kernel_trap_sp() on ia64, based on systemtap's runtime/regs.h.

Signed-off-by: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
Cc: Tony Luck <tony.luck@xxxxxxxxx>
---
 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@xxxxxxxxxx


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