linux-kernel - [PATCH 27/27] Fix PTRDIFF_MIN/PTRDIFF_MIN and PTRDIFF

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Message-ID: <1466485631-3532-29-git-send-email-ynorov@caviumnetworks.com>
Date:	Tue, 21 Jun 2016 08:07:11 +0300
From:	Yury Norov <ynorov@...iumnetworks.com>
To:	<libc-alpha@...rceware.org>, <linux-kernel@...r.kernel.org>
CC:	<arnd@...db.de>, <catalin.marinas@....com>,
	<marcus.shawcroft@....com>, <philb@....org>, <davem@...emloft.net>,
	<szabolcs.nagy@....com>, <maxim.kuvyrkov@...aro.org>,
	<joseph@...esourcery.com>, <pinskia@...il.com>,
	Andrew Pinski <apinski@...ium.com>,
	Yury Norov <ynorov@...iumnetworks.com>
Subject: [PATCH 27/27] Fix PTRDIFF_MIN/PTRDIFF_MIN and PTRDIFF_MIN for ILP32.

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

Signed-off-by: Andrew Pinski <apinski@...ium.com>
Signed-off-by: Yury Norov <ynorov@...iumnetworks.com>
---
 sysdeps/aarch64/bits/wordsize.h | 8 +++-----
 sysdeps/generic/stdint.h        | 9 +++++++--
 2 files changed, 10 insertions(+), 7 deletions(-)

diff --git a/sysdeps/aarch64/bits/wordsize.h b/sysdeps/aarch64/bits/wordsize.h
index 3d5a79d..18697e2 100644
--- a/sysdeps/aarch64/bits/wordsize.h
+++ b/sysdeps/aarch64/bits/wordsize.h
@@ -19,12 +19,10 @@
 # define __WORDSIZE	64
 #else
 # define __WORDSIZE	32
+# define __WORDSIZE32_SIZE_ULONG       1
+# define __WORDSIZE32_PTRDIFF_LONG 1
 #endif
 
-/* LP64 and ILP32s ABI uses a 64bit time_t.
-   This allows aarch32 and AARCH64 applications
+/* This allows ILP32 and AARCH64 applications
    both access utmp. */
 #define __WORDSIZE_TIME64_COMPAT32	1
-
-/* LP64 and ILP32 use the 64bit system call interface. */
-#define __SYSCALL_WORDSIZE 64
diff --git a/sysdeps/generic/stdint.h b/sysdeps/generic/stdint.h
index 4427627..05f895a 100644
--- a/sysdeps/generic/stdint.h
+++ b/sysdeps/generic/stdint.h
@@ -248,8 +248,13 @@ typedef unsigned long long int	uintmax_t;
 #  define PTRDIFF_MIN		(-9223372036854775807L-1)
 #  define PTRDIFF_MAX		(9223372036854775807L)
 # else
-#  define PTRDIFF_MIN		(-2147483647-1)
-#  define PTRDIFF_MAX		(2147483647)
+#  ifdef __WORDSIZE32_PTRDIFF_LONG
+#    define PTRDIFF_MIN		(-2147483647L-1)
+#    define PTRDIFF_MAX		(2147483647L)
+#  else
+#    define PTRDIFF_MIN		(-2147483647-1)
+#    define PTRDIFF_MAX		(2147483647)
+#  endif
 # endif
 
 /* Limits of `sig_atomic_t'.  */
-- 
2.7.4