All of lore.kernel.org
 help / color / mirror / Atom feed
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 v8 1/6] uapi: Define the aux vector AT_MINSIGSTKSZ
Date: Wed, 21 Apr 2021 21:48:51 -0700	[thread overview]
Message-ID: <20210422044856.27250-2-chang.seok.bae@intel.com> (raw)
In-Reply-To: <20210422044856.27250-1-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 v6:
* Revised the comment. (Borislav Petkov)

Change from v5:
* Reverted the arm64 change. (Dave Martin and Will Deacon)
* 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..c7e502bf5a6f 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	/* minimal stack size for signal delivery */
+#endif
 
 #endif /* _UAPI_LINUX_AUXVEC_H */
-- 
2.17.1


WARNING: multiple messages have this Message-ID (diff)
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 v8 1/6] uapi: Define the aux vector AT_MINSIGSTKSZ
Date: Wed, 21 Apr 2021 21:48:51 -0700	[thread overview]
Message-ID: <20210422044856.27250-2-chang.seok.bae@intel.com> (raw)
In-Reply-To: <20210422044856.27250-1-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 v6:
* Revised the comment. (Borislav Petkov)

Change from v5:
* Reverted the arm64 change. (Dave Martin and Will Deacon)
* 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..c7e502bf5a6f 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	/* minimal stack size for signal delivery */
+#endif
 
 #endif /* _UAPI_LINUX_AUXVEC_H */
-- 
2.17.1


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  reply	other threads:[~2021-04-22  4:54 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-22  4:48 [PATCH v8 0/6] Improve Minimum Alternate Stack Size Chang S. Bae
2021-04-22  4:48 ` Chang S. Bae [this message]
2021-04-22  4:48   ` [PATCH v8 1/6] uapi: Define the aux vector AT_MINSIGSTKSZ Chang S. Bae
2021-04-22  4:48 ` [PATCH v8 2/6] x86/signal: Introduce helpers to get the maximum signal frame size Chang S. Bae
2021-05-03 13:06   ` Borislav Petkov
2021-04-22  4:48 ` [PATCH v8 3/6] x86/elf: Support a new ELF aux vector AT_MINSIGSTKSZ Chang S. Bae
2021-04-22  4:48 ` [PATCH v8 4/6] selftest/sigaltstack: Use the AT_MINSIGSTKSZ aux vector if available Chang S. Bae
2021-04-22  4:48 ` [PATCH v8 5/6] x86/signal: Detect and prevent an alternate signal stack overflow Chang S. Bae
2021-04-22  8:46   ` David Laight
2021-04-22 16:31     ` Bae, Chang Seok
2021-04-22 22:04       ` David Laight
2021-05-18 20:53         ` Bae, Chang Seok
2021-05-11 18:36   ` Borislav Petkov
2021-05-12 18:48     ` Bae, Chang Seok
2021-05-12 20:55       ` Thomas Gleixner
2021-05-14  7:26         ` Borislav Petkov
2021-04-22  4:48 ` [PATCH v8 6/6] selftest/x86/signal: Include test cases for validating sigaltstack Chang S. Bae

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210422044856.27250-2-chang.seok.bae@intel.com \
    --to=chang.seok.bae@intel.com \
    --cc=Dave.Martin@arm.com \
    --cc=bp@suse.de \
    --cc=carlos@redhat.com \
    --cc=dave.hansen@intel.com \
    --cc=hjl.tools@gmail.com \
    --cc=jannh@google.com \
    --cc=len.brown@intel.com \
    --cc=libc-alpha@sourceware.org \
    --cc=linux-api@vger.kernel.org \
    --cc=linux-arch@vger.kernel.org \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=luto@kernel.org \
    --cc=mingo@kernel.org \
    --cc=mpe@ellerman.id.au \
    --cc=ravi.v.shankar@intel.com \
    --cc=tglx@linutronix.de \
    --cc=tony.luck@intel.com \
    --cc=x86@kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.