linux-kernel - [PATCH v5 05/23] arm64:ilp32: expose 'kernel

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <1443564860-31208-6-git-send-email-ynorov@caviumnetworks.com>
Date:	Wed, 30 Sep 2015 01:14:02 +0300
From:	Yury Norov <ynorov@...iumnetworks.com>
To:	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, <catalin.marinas@....com>,
	<arnd@...db.de>, <agraf@...e.de>, <bamvor.zhangjian@...wei.com>
CC:	<yury.norov@...il.com>, <philipp.tomsich@...obroma-systems.com>,
	<apinski@...ium.com>, <christoph.muellner@...obroma-systems.com>,
	<klimov.linux@...il.com>, Yury Norov <ynorov@...iumnetworks.com>
Subject: [PATCH v5 05/23] arm64:ilp32: expose 'kernel_long' as 'long long' for ILP32

From: Andrew Pinski <apinski@...ium.com>

Since we want time_t and some other userland types to be the same
between ILP32 and LP64, we define __kernel_long_t to be long long.

To reuse the bulk of LP64 system calls (and data structures), the LP64
kernel data types ('kernel_long', 'kernel_ulong') are exposed as their
ILP32 'long long' and 'unsigned long long' equivalents to allow glibc
to correctly interpret most data-structures used in the kernel ABI
(i.el with the exception of those, that include pointers).

Signed-off-by: Philipp Tomsich <philipp.tomsich@...obroma-systems.com>
Signed-off-by: Christoph Muellner <christoph.muellner@...obroma-systems.com>
Signed-off-by: Yury Norov <ynorov@...iumnetworks.com>

diff --git a/arch/arm64/include/uapi/asm/posix_types.h b/arch/arm64/include/uapi/asm/posix_types.h
index 7985ff6..d6a7cb5 100644
--- a/arch/arm64/include/uapi/asm/posix_types.h
+++ b/arch/arm64/include/uapi/asm/posix_types.h
@@ -5,6 +5,16 @@ typedef unsigned short __kernel_old_uid_t;
 typedef unsigned short __kernel_old_gid_t;
 #define __kernel_old_uid_t __kernel_old_uid_t
 
+#if defined(__ILP32__)
+/* The ILP32 kernel ABI reuses LP64 system calls where possible; to
+   this end, the equivalent ILP32 type definitions are used (a 64bit
+   'long'-type in LP64 corresponds to a 'long long' in LP64).  */
+
+typedef long long           __kernel_long_t;
+typedef unsigned long long  __kernel_ulong_t;
+#define __kernel_long_t     __kernel_long_t
+#endif /* defined(__ILP32__) */
+
 #include <asm-generic/posix_types.h>
 
-#endif /*  __ASM_POSIX_TYPES_H */
+#endif /* __ASM_POSIX_TYPES_H */
-- 
2.1.4

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/