From: Dave Martin <Dave.Martin@arm.com>
To: linux-arm-kernel@lists.infradead.org
Cc: Szabolcs Nagy <szabolcs.nagy@arm.com>,
Will Deacon <will.deacon@arm.com>,
linux-kernel@vger.kernel.org, Alan Hayward <alan.hayward@arm.com>
Subject: [PATCH 2/3] arm64/sve: ptrace: Fix SVE_PT_REGS_OFFSET definition
Date: Tue, 11 Dec 2018 19:26:46 +0000 [thread overview]
Message-ID: <1544556407-19897-3-git-send-email-Dave.Martin@arm.com> (raw)
In-Reply-To: <1544556407-19897-1-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 to 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
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next prev parent reply other threads:[~2018-12-11 19:27 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-11 19:26 [PATCH 0/3] arm64/sve: UAPI: Disentangle ptrace.h from sigcontext.h Dave Martin
2018-12-11 19:26 ` [PATCH 1/3] kbuild: install_headers.sh: Strip _UAPI from #if-defined() guards Dave Martin
2018-12-11 19:26 ` Dave Martin [this message]
2018-12-11 19:26 ` [PATCH 3/3] arm64/sve: Disentangle <uapi/asm/ptrace.h> from <uapi/asm/sigcontext.h> Dave Martin
2018-12-15 9:20 ` kbuild test robot
2018-12-18 12:14 ` Dave Martin
2018-12-19 15:11 ` Szabolcs Nagy
2018-12-19 15:23 ` Dave Martin
2018-12-19 15:26 ` Szabolcs Nagy
2018-12-14 18:13 ` [PATCH 0/3] arm64/sve: UAPI: Disentangle ptrace.h from sigcontext.h Szabolcs Nagy
2018-12-14 18:25 ` Dave Martin
2018-12-14 19:00 ` Szabolcs Nagy
2018-12-14 19:28 ` Dave P Martin
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