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[v2,1/2] arm64/sve: ptrace: Fix SVE_PT_REGS_OFFSET definition

Message ID 1546607391-3850-2-git-send-email-Dave.Martin@arm.com
State New
Headers show
Series arm64/sve: UAPI: Disentangle ptrace.h from sigcontext.h | expand

Commit Message

Dave Martin Jan. 4, 2019, 1:09 p.m. UTC
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>

 arch/arm64/include/uapi/asm/ptrace.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

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diff --git a/arch/arm64/include/uapi/asm/ptrace.h b/arch/arm64/include/uapi/asm/ptrace.h
index a36227f..65ef8b0 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))	\