From df34134284b46cdd8ffd39551b858652d465ca08 Mon Sep 17 00:00:00 2001 From: Joseph Myers Date: Wed, 28 Jan 2015 18:40:35 +0000 Subject: Disable 64-bit atomics for MIPS n32. This patch disables use of 64-bit atomics for MIPS n32 to fix the problems with unaligned semaphores. Before 64-bit atomics are used for anything for which such alignment issues do not arise, and before the addition of any new ILP32 ports with 64-bit semaphores for which the ABI can be set to have the greater alignment (AARCH64?), a better approach will need to be established that allows architectures to declare their 64-bit atomics availability accurately, without doing so causing inappropriate use of such atomics on unaligned semaphores. Tested for MIPS n32 that this fixes the nptl/tst-sem3 failure. * sysdeps/mips/bits/atomic.h [_MIPS_SIM == _ABIN32] (__HAVE_64B_ATOMICS): Define to 0. --- sysdeps/mips/bits/atomic.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'sysdeps') diff --git a/sysdeps/mips/bits/atomic.h b/sysdeps/mips/bits/atomic.h index ddcb0391a6..a39188160b 100644 --- a/sysdeps/mips/bits/atomic.h +++ b/sysdeps/mips/bits/atomic.h @@ -44,7 +44,7 @@ typedef uintmax_t uatomic_max_t; #define MIPS_PUSH_MIPS2 #endif -#if _MIPS_SIM == _ABIO32 +#if _MIPS_SIM == _ABIO32 || _MIPS_SIM == _ABIN32 #define __HAVE_64B_ATOMICS 0 #else #define __HAVE_64B_ATOMICS 1 -- cgit 1.4.1