[PATCH v5 3/4] arm64: Add regs_return_value() in syscall.h

From: AKASHI Takahiro
Date: Sat Mar 15 2014 - 01:41:02 EST


This macro, regs_return_value, is used mainly for audit to record system
call's results, but may also be used in test_kprobes.c.

Acked-by: Will Deacon <will.deacon@xxxxxxx>
Acked-by: Richard Guy Briggs <rgb@xxxxxxxxxx>
Signed-off-by: AKASHI Takahiro <takahiro.akashi@xxxxxxxxxx>
---
arch/arm64/include/asm/ptrace.h | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/arch/arm64/include/asm/ptrace.h b/arch/arm64/include/asm/ptrace.h
index 0e7fa49..5800ec1 100644
--- a/arch/arm64/include/asm/ptrace.h
+++ b/arch/arm64/include/asm/ptrace.h
@@ -134,6 +134,11 @@ struct pt_regs {
#define user_stack_pointer(regs) \
((regs)->sp)

+static inline unsigned long regs_return_value(struct pt_regs *regs)
+{
+ return regs->regs[0];
+}
+
/*
* Are the current registers suitable for user mode? (used to maintain
* security in signal handlers)
--
1.8.3.2

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