From: Dave Martin <Dave.Martin@arm.com>
To: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org, Will Deacon <will.deacon@arm.com>,
Alan Hayward <alan.hayward@arm.com>,
Szabolcs Nagy <szabolcs.nagy@arm.com>
Subject: [PATCH v2 1/2] arm64/sve: ptrace: Fix SVE_PT_REGS_OFFSET definition
Date: Fri, 4 Jan 2019 13:09:50 +0000 [thread overview]
Message-ID: <1546607391-3850-2-git-send-email-Dave.Martin@arm.com> (raw)
In-Reply-To: <1546607391-3850-1-git-send-email-Dave.Martin@arm.com>
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(-)
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)) \
/ SVE_VQ_BYTES * SVE_VQ_BYTES)
/*
--
2.1.4
next prev parent reply other threads:[~2019-01-04 13:10 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-04 13:09 [PATCH v2 0/2] arm64/sve: UAPI: Disentangle ptrace.h from sigcontext.h Dave Martin
2019-01-04 13:09 ` Dave Martin [this message]
2019-01-04 13:09 ` [PATCH v2 2/2] arm64/sve: Disentangle <uapi/asm/ptrace.h> from <uapi/asm/sigcontext.h> Dave Martin
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