From: Dave Martin <Dave.Martin-5wv7dgnIgG8@public.gmane.org>
To: linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
Cc: linux-arch-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
"Eric W. Biederman"
<ebiederm-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org>,
Will Deacon <will.deacon-5wv7dgnIgG8@public.gmane.org>,
Catalin Marinas <catalin.marinas-5wv7dgnIgG8@public.gmane.org>,
Russell King <linux-I+IVW8TIWO2tmTQ+vhA3Yw@public.gmane.org>
Subject: [RFC PATCH v2 1/3] signal: Add FPE_FLTUNK si_code for undiagnosable fp exceptions
Date: Tue, 30 Jan 2018 18:50:41 +0000 [thread overview]
Message-ID: <1517338243-9749-2-git-send-email-Dave.Martin@arm.com> (raw)
In-Reply-To: <1517338243-9749-1-git-send-email-Dave.Martin-5wv7dgnIgG8@public.gmane.org>
Some architectures cannot always report accurately what kind of
floating-point exception triggered a floating-point exception trap.
This can occur with fp exceptions occuring on lanes in a vector
instruction on arm64 for example.
Rather than have every architecture come up with its own way of
descrbing such a condition, this patch adds a common FPE_FLTUNK do
report that an fp exception caused a trap but we cannot be certain
which kind of fp exception it was.
Signed-off-by: Dave Martin <Dave.Martin-5wv7dgnIgG8@public.gmane.org>
---
include/uapi/asm-generic/siginfo.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/include/uapi/asm-generic/siginfo.h b/include/uapi/asm-generic/siginfo.h
index 254afc3..450b31f 100644
--- a/include/uapi/asm-generic/siginfo.h
+++ b/include/uapi/asm-generic/siginfo.h
@@ -229,7 +229,8 @@ typedef struct siginfo {
# define __FPE_INVASC 12 /* invalid ASCII digit */
# define __FPE_INVDEC 13 /* invalid decimal digit */
#endif
-#define NSIGFPE 13
+#define FPE_FLTUNK 14 /* undiagnosed floating-point exception */
+#define NSIGFPE 14
/*
* SIGSEGV si_codes
--
2.1.4
WARNING: multiple messages have this Message-ID (diff)
From: Dave Martin <Dave.Martin@arm.com>
To: linux-arm-kernel@lists.infradead.org
Cc: linux-arch@vger.kernel.org, linux-api@vger.kernel.org,
"Eric W. Biederman" <ebiederm@xmission.com>,
Will Deacon <will.deacon@arm.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Russell King <linux@armlinux.org.uk>
Subject: [RFC PATCH v2 1/3] signal: Add FPE_FLTUNK si_code for undiagnosable fp exceptions
Date: Tue, 30 Jan 2018 18:50:41 +0000 [thread overview]
Message-ID: <1517338243-9749-2-git-send-email-Dave.Martin@arm.com> (raw)
Message-ID: <20180130185041.XeDnrIXVj5hids1NHgGr-YiCHPkVoPaEOU-1xpcOo6A@z> (raw)
In-Reply-To: <1517338243-9749-1-git-send-email-Dave.Martin@arm.com>
Some architectures cannot always report accurately what kind of
floating-point exception triggered a floating-point exception trap.
This can occur with fp exceptions occuring on lanes in a vector
instruction on arm64 for example.
Rather than have every architecture come up with its own way of
descrbing such a condition, this patch adds a common FPE_FLTUNK do
report that an fp exception caused a trap but we cannot be certain
which kind of fp exception it was.
Signed-off-by: Dave Martin <Dave.Martin@arm.com>
---
include/uapi/asm-generic/siginfo.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/include/uapi/asm-generic/siginfo.h b/include/uapi/asm-generic/siginfo.h
index 254afc3..450b31f 100644
--- a/include/uapi/asm-generic/siginfo.h
+++ b/include/uapi/asm-generic/siginfo.h
@@ -229,7 +229,8 @@ typedef struct siginfo {
# define __FPE_INVASC 12 /* invalid ASCII digit */
# define __FPE_INVDEC 13 /* invalid decimal digit */
#endif
-#define NSIGFPE 13
+#define FPE_FLTUNK 14 /* undiagnosed floating-point exception */
+#define NSIGFPE 14
/*
* SIGSEGV si_codes
--
2.1.4
next prev parent reply other threads:[~2018-01-30 18:50 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-30 18:50 [RFC PATCH v2 0/3] arm64: Fix invalid si_codes for fault signals Dave Martin
2018-01-30 18:50 ` Dave Martin
[not found] ` <1517338243-9749-1-git-send-email-Dave.Martin-5wv7dgnIgG8@public.gmane.org>
2018-01-30 18:50 ` Dave Martin [this message]
2018-01-30 18:50 ` [RFC PATCH v2 1/3] signal: Add FPE_FLTUNK si_code for undiagnosable fp exceptions Dave Martin
2018-01-30 18:50 ` [RFC PATCH v2 2/3] arm64: fpsimd: Fix bad si_code for undiagnosed SIGFPE Dave Martin
2018-01-30 18:50 ` Dave Martin
2018-01-30 18:50 ` [RFC PATCH v2 3/3] arm64: signal: Ensure si_code is valid for all fault signals Dave Martin
2018-01-30 18:50 ` Dave Martin
2018-02-13 13:58 ` James Morse
2018-02-13 15:22 ` Dave Martin
[not found] ` <20180213152207.GP5862-M5GwZQ6tE7x5pKCnmE3YQBJ8xKzm50AiAL8bYrjMMd8@public.gmane.org>
2018-02-13 18:00 ` James Morse
2018-02-13 18:00 ` James Morse
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