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[PATCH] PPC32 NPTL Chance MALLOC_ALIGNMENT for VMX
- From: Steve Munroe <sjmunroe at us dot ibm dot com>
- To: libc-alpha at sources dot redhat dot com, Andreas Jaeger <aj at suse dot de>, janis187 at us dot ibm dot com
- Date: Thu, 11 Mar 2004 10:46:12 -0600
- Subject: [PATCH] PPC32 NPTL Chance MALLOC_ALIGNMENT for VMX
- Organization: IBM LTC
- Reply-to: sjmunroe at vnet dot ibm dot com
The Altivec/VMX instructions require 16-byte alignment. So we need to
change the default alignment for malloc/calloc/realloc to avoid SIGILL
when uses malloc for vector types.
Any problems with this change?
2004-03-11 Steven Munroe <sjmunroe@us.ibm.com>
* sysdeps/unix/sysv/linux/powerpc/powerpc32/malloc-machine.h: New file.
Define MALLOC_ALIGNMENT as 16 for VMX.
diff -urN libc23-cvstip-20040301/nptl/sysdeps/unix/sysv/linux/powerpc/powerpc32/malloc-machine.h libc23/nptl/sysdeps/unix/sysv/linux/powerpc/powerpc32/malloc-machine.h
--- libc23-cvstip-20040301/nptl/sysdeps/unix/sysv/linux/powerpc/powerpc32/malloc-machine.h Wed Dec 31 18:00:00 1969
+++ libc23/nptl/sysdeps/unix/sysv/linux/powerpc/powerpc32/malloc-machine.h Thu Mar 11 08:46:12 2004
@@ -0,0 +1,29 @@
+/* Basic platform-independent macro definitions for mutexes,
+ thread-specific data and parameters for malloc.
+ Copyright (C) 2003, 2004 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#ifndef _POWERPC32_MALLOC_MACHINE_H
+#define _POWERPC32_MALLOC_MACHINE_H
+
+/* Altivec/VMX support requires 16 byte alignment to avoid alignment exceptions */
+#define MALLOC_ALIGNMENT 16
+
+#include <nptl/sysdeps/pthread/malloc-machine.h>
+
+#endif /* !defined(_POWERPC32_MALLOC_MACHINE_H) */