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arm64: Add regs_return_value() in syscall.h

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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 d34a3ebd8d)
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
AKASHI Takahiro
2014-04-30 10:51:31 +01:00
committed by Mark Brown
parent 517f60a12d
commit 376758fe9e
1 changed files with 5 additions and 0 deletions
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5
arch/arm64/include/asm/ptrace.h
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@@ -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)