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arm64/sve: ptrace: Fix SVE_PT_REGS_OFFSET definition

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[ 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>
This commit is contained in:
Dave Martin 2019-01-04 13:09:50 +00:00 committed by Greg Kroah-Hartman
parent d921bb1625
commit d69ad39ad5
1 changed files with 1 additions and 1 deletions
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2
arch/arm64/include/uapi/asm/ptrace.h
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@ -130,7 +130,7 @@ 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)
/*