| From | Sasha Levin <> | Subject | [PATCH AUTOSEL 4.20 295/304] arm64/sve: ptrace: Fix SVE_PT_REGS_OFFSET definition | Date | Mon, 28 Jan 2019 10:43:32 -0500 |
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From: Dave Martin <Dave.Martin@arm.com>
[ Upstream commit ee1b465b303591d3a04d403122bbc0d7026520fb ]
SVE_PT_REGS_OFFSET is supposed to indicate the offset for skipping over the ptrace NT_ARM_SVE header (struct user_sve_header) to the start of the SVE register data proper.
However, currently SVE_PT_REGS_OFFSET is defined in terms of struct sve_context, which is wrong: that structure describes the SVE header in the signal frame, not in the ptrace regset.
This patch fixes the definition to use the ptrace header structure struct user_sve_header instead.
By good fortune, the two structures are the same size anyway, so there is no functional or ABI change.
Signed-off-by: Dave Martin <Dave.Martin@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Sasha Levin <sashal@kernel.org> --- arch/arm64/include/uapi/asm/ptrace.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm64/include/uapi/asm/ptrace.h b/arch/arm64/include/uapi/asm/ptrace.h index a36227fdb084..65ef8b0fdb0e 100644 --- a/arch/arm64/include/uapi/asm/ptrace.h +++ b/arch/arm64/include/uapi/asm/ptrace.h @@ -131,7 +131,7 @@ struct user_sve_header { /* Offset from the start of struct user_sve_header to the register data */ #define SVE_PT_REGS_OFFSET \ - ((sizeof(struct sve_context) + (SVE_VQ_BYTES - 1)) \ + ((sizeof(struct user_sve_header) + (SVE_VQ_BYTES - 1)) \ / SVE_VQ_BYTES * SVE_VQ_BYTES) /* -- 2.19.1
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