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From: Kees Cook <keescook@chromium.org>
To: kernel-hardening@lists.openwall.com
Cc: Kees Cook <keescook@chromium.org>,
	Michael Leibowitz <michael.leibowitz@intel.com>
Subject: [kernel-hardening] [PATCH 02/18] compiler: Add __designated_init annotation
Date: Thu,  6 Apr 2017 14:18:17 -0700	[thread overview]
Message-ID: <1491513513-84351-3-git-send-email-keescook@chromium.org> (raw)
In-Reply-To: <1491513513-84351-1-git-send-email-keescook@chromium.org>

This allows structure annotations for requiring designated initialization
in GCC 5.1.0 and later:
https://gcc.gnu.org/onlinedocs/gcc/Designated-Inits.html

The structure randomization layout plugin will be using this to help
identify structures that need this form of initialization.

Signed-off-by: Kees Cook <keescook@chromium.org>
---
 include/linux/compiler-gcc.h | 8 ++++++++
 include/linux/compiler.h     | 4 ++++
 2 files changed, 12 insertions(+)

diff --git a/include/linux/compiler-gcc.h b/include/linux/compiler-gcc.h
index 5f4d8f8b75da..cf541e49841e 100644
--- a/include/linux/compiler-gcc.h
+++ b/include/linux/compiler-gcc.h
@@ -321,6 +321,14 @@
 #define __no_sanitize_address __attribute__((no_sanitize_address))
 #endif
 
+#if GCC_VERSION >= 50100
+/*
+ * Mark structures as requiring designated initializers.
+ * https://gcc.gnu.org/onlinedocs/gcc/Designated-Inits.html
+ */
+#define __designated_init __attribute__((designated_init))
+#endif
+
 #endif	/* gcc version >= 40000 specific checks */
 
 #if !defined(__noclone)
diff --git a/include/linux/compiler.h b/include/linux/compiler.h
index b8642a3a1f4f..40e584448605 100644
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -440,6 +440,10 @@ static __always_inline void __write_once_size(volatile void *p, void *res, int s
 # define __attribute_const__	/* unimplemented */
 #endif
 
+#ifndef __designated_init
+# define __designated_init
+#endif
+
 #ifndef __latent_entropy
 # define __latent_entropy
 #endif
-- 
2.7.4

  parent reply	other threads:[~2017-04-06 21:18 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-04-06 21:18 [kernel-hardening] [PATCH 00/18] Introduce struct layout randomization plugin Kees Cook
2017-04-06 21:18 ` [kernel-hardening] [PATCH 01/18] gcc-plugins: Add the randstruct plugin Kees Cook
2017-04-12 22:12   ` [kernel-hardening] " Kees Cook
2017-04-17  5:30     ` Jessica Yu
2017-04-17 15:23       ` Kees Cook
2017-05-12  6:37         ` Loganaden Velvindron
2017-05-12 19:36           ` Kees Cook
2017-04-06 21:18 ` Kees Cook [this message]
2017-04-06 21:18 ` [kernel-hardening] [PATCH 03/18] randstruct: Set designated_init attribute Kees Cook
2017-04-06 21:18 ` [kernel-hardening] [PATCH 04/18] randstruct: Differentiate bad cast warnings Kees Cook
2017-04-06 21:18 ` [kernel-hardening] [PATCH 05/18] af_unix: Use designated initializers Kees Cook
2017-04-06 21:18 ` [kernel-hardening] [PATCH 06/18] NFS: Avoid cross-structure casting Kees Cook
2017-04-06 21:18 ` [kernel-hardening] [PATCH 07/18] randstruct: Whitelist struct security_hook_heads cast Kees Cook
2017-04-06 21:18 ` [kernel-hardening] [PATCH 08/18] randstruct: Whitelist UNIXCB cast Kees Cook
2017-04-06 21:18 ` [kernel-hardening] [PATCH 09/18] randstruct: Mark various structs for randomization Kees Cook
2017-04-06 21:18 ` [kernel-hardening] [PATCH 10/18] scsi/bfa: use designated initializers Kees Cook
2017-04-06 21:18 ` [kernel-hardening] [PATCH 11/18] scsi: qedi,qedf: Use " Kees Cook
2017-04-06 21:18 ` [kernel-hardening] [PATCH 12/18] ovl: " Kees Cook
2017-04-06 21:18 ` [kernel-hardening] [PATCH 13/18] randstruct: opt-out externally exposed function pointer structs Kees Cook
2017-04-06 21:18 ` [kernel-hardening] [PATCH 14/18] randstruct: Disable randomization of ACPICA structs Kees Cook
2017-04-06 21:18 ` [kernel-hardening] [PATCH 15/18] randstruct: Enable function pointer struct detection Kees Cook
2017-04-06 21:18 ` [kernel-hardening] [PATCH 16/18] task_struct: Allow randomized layout Kees Cook
2017-04-07 16:25   ` Rik van Riel
2017-04-07 20:43     ` Kees Cook
2017-04-06 21:18 ` [kernel-hardening] [PATCH 17/18] sgi-xp: Use designated initializers Kees Cook
2017-04-06 21:18 ` [kernel-hardening] [PATCH 18/18] ACPICA: " Kees Cook
2017-04-06 21:54 ` [kernel-hardening] [PATCH 00/18] Introduce struct layout randomization plugin James Morris
2017-04-06 22:32   ` Rik van Riel
2017-04-06 22:51     ` Kees Cook
2017-04-13 23:39 ` Laura Abbott
2017-04-15 18:50   ` Kees Cook
2017-04-18 17:15     ` Laura Abbott
2017-04-18 17:20       ` Kees Cook
2017-04-18 16:54 ` Laura Abbott

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