From 376758fe9eb42dae79cbdbdf80ff30b588024c31 Mon Sep 17 00:00:00 2001
From: AKASHI Takahiro <takahiro.akashi@linaro.org>
Date: Wed, 30 Apr 2014 10:51:31 +0100
Subject: [PATCH] arm64: Add regs_return_value() in syscall.h
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@arm.com>
Acked-by: Richard Guy Briggs <rgb@redhat.com>
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
(cherry picked from commit d34a3ebd8d25cf691a94fae66a957a480cf46430)
Signed-off-by: Mark Brown <broonie@linaro.org>
---
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 41a71ee4c3df..f38a8aa58d4c 100644
--- a/arch/arm64/include/asm/ptrace.h
+++ b/arch/arm64/include/asm/ptrace.h
@@ -133,6 +133,11 @@ 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)
--
2.34.1