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From: "Chang S. Bae" <chang.seok.bae@intel.com>
To: bp@suse.de, tglx@linutronix.de, mingo@kernel.org,
	luto@kernel.org, x86@kernel.org
Cc: len.brown@intel.com, dave.hansen@intel.com, hjl.tools@gmail.com,
	Dave.Martin@arm.com, jannh@google.com, mpe@ellerman.id.au,
	carlos@redhat.com, tony.luck@intel.com, ravi.v.shankar@intel.com,
	libc-alpha@sourceware.org, linux-arch@vger.kernel.org,
	linux-api@vger.kernel.org, linux-kernel@vger.kernel.org,
	chang.seok.bae@intel.com, linux-arm-kernel@lists.infradead.org
Subject: [PATCH v6 1/6] uapi: Define the aux vector AT_MINSIGSTKSZ
Date: Sat, 27 Feb 2021 08:59:06 -0800	[thread overview]
Message-ID: <20210227165911.32757-2-chang.seok.bae@intel.com> (raw)
In-Reply-To: <20210227165911.32757-1-chang.seok.bae@intel.com>

Define the AT_MINSIGSTKSZ in generic Linux. It is already used as generic
ABI in glibc's generic elf.h, and this define will prevent future namespace
conflicts. In particular, x86 is also using this generic definition.

Signed-off-by: Chang S. Bae <chang.seok.bae@intel.com>
Reviewed-by: Len Brown <len.brown@intel.com>
Cc: Carlos O'Donell <carlos@redhat.com>
Cc: Dave Martin <Dave.Martin@arm.com>
Cc: libc-alpha@sourceware.org
Cc: linux-arch@vger.kernel.org
Cc: linux-api@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
---
Change from v5:
* Reverted the arm64 change. (Dave Martin)
* Massaged the changelog.

Change from v4:
* Added as a new patch (Carlos O'Donell)
---
 include/uapi/linux/auxvec.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/uapi/linux/auxvec.h b/include/uapi/linux/auxvec.h
index abe5f2b6581b..15be98c75174 100644
--- a/include/uapi/linux/auxvec.h
+++ b/include/uapi/linux/auxvec.h
@@ -33,5 +33,8 @@
 
 #define AT_EXECFN  31	/* filename of program */
 
+#ifndef AT_MINSIGSTKSZ
+#define AT_MINSIGSTKSZ	51	/* stack needed for signal delivery  */
+#endif
 
 #endif /* _UAPI_LINUX_AUXVEC_H */
-- 
2.17.1


  reply	other threads:[~2021-02-27 17:20 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-27 16:59 [PATCH v6 0/6] x86: Improve Minimum Alternate Stack Size Chang S. Bae
2021-02-27 16:59 ` Chang S. Bae [this message]
2021-03-01 19:09   ` [PATCH v6 1/6] uapi: Define the aux vector AT_MINSIGSTKSZ Borislav Petkov
2021-03-10 16:31     ` Bae, Chang Seok
2021-02-27 16:59 ` [PATCH v6 2/6] x86/signal: Introduce helpers to get the maximum signal frame size Chang S. Bae
2021-02-27 16:59 ` [PATCH v6 3/6] x86/elf: Support a new ELF aux vector AT_MINSIGSTKSZ Chang S. Bae
2021-03-05 10:43   ` Borislav Petkov
2021-03-10 16:34     ` Bae, Chang Seok
2021-03-10 17:43       ` Borislav Petkov
2021-03-10 18:01         ` Bae, Chang Seok
2021-02-27 16:59 ` [PATCH v6 4/6] selftest/sigaltstack: Use the AT_MINSIGSTKSZ aux vector if available Chang S. Bae
2021-02-27 16:59 ` [PATCH v6 5/6] x86/signal: Detect and prevent an alternate signal stack overflow Chang S. Bae
2021-02-27 16:59 ` [PATCH v6 6/6] selftest/x86/signal: Include test cases for validating sigaltstack Chang S. Bae

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