This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / arch / parisc / lib / fixup.S

diff --git a/arch/parisc/lib/fixup.S b/arch/parisc/lib/fixup.S
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+/*
+ * Linux/PA-RISC Project (http://www.parisc-linux.org/)
+ *
+ *  Copyright (C) 2004  Randolph Chung <tausq@debian.org>
+ *
+ *    This program is free software; you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation; either version 2, or (at your option)
+ *    any later version.
+ *
+ *    This program 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 General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program; if not, write to the Free Software
+ *    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * 
+ * Fixup routines for kernel exception handling.
+ */
+#include <linux/config.h>
+#include <asm/offsets.h>
+#include <asm/assembly.h>
+#include <asm/errno.h>
+
+#ifdef CONFIG_SMP
+       .macro  get_fault_ip t1 t2
+       addil LT%__per_cpu_offset,%r27
+       LDREG RT%__per_cpu_offset(%r1),\t1
+       /* t2 = smp_processor_id() */
+       mfctl 30,\t2
+       ldw TI_CPU(\t2),\t2
+#ifdef __LP64__
+       extrd,u \t2,63,32,\t2
+#endif
+       /* t2 = &__per_cpu_offset[smp_processor_id()]; */
+       LDREG,s \t2(\t1),\t2 
+       addil LT%per_cpu__exception_data,%r27
+       LDREG RT%per_cpu__exception_data(%r1),\t1
+       /* t1 = &__get_cpu_var(exception_data) */
+       add,l \t1,\t2,\t1
+       /* t1 = t1->fault_ip */
+       LDREG EXCDATA_IP(\t1), \t1
+       .endm
+#else
+       .macro  get_fault_ip t1 t2
+       /* t1 = &__get_cpu_var(exception_data) */
+       addil LT%per_cpu__exception_data,%r27
+       LDREG RT%per_cpu__exception_data(%r1),\t2
+       /* t1 = t2->fault_ip */
+       LDREG EXCDATA_IP(\t2), \t1
+       .endm
+#endif
+
+       .text
+       .section .fixup, "ax"
+
+       /* get_user() fixups, store -EFAULT in r8, and 0 in r9 */
+       .export fixup_get_user_skip_1
+fixup_get_user_skip_1:
+       get_fault_ip %r1,%r8
+       ldo 4(%r1), %r1
+       ldi -EFAULT, %r8
+       bv %r0(%r1)
+       copy %r0, %r9
+
+       .export fixup_get_user_skip_2
+fixup_get_user_skip_2:
+       get_fault_ip %r1,%r8
+       ldo 8(%r1), %r1
+       ldi -EFAULT, %r8
+       bv %r0(%r1)
+       copy %r0, %r9
+
+       /* put_user() fixups, store -EFAULT in r8 */
+       .export fixup_put_user_skip_1
+fixup_put_user_skip_1:
+       get_fault_ip %r1,%r8
+       ldo 4(%r1), %r1
+       bv %r0(%r1)
+       ldi -EFAULT, %r8
+
+       .export fixup_put_user_skip_2
+fixup_put_user_skip_2:
+       get_fault_ip %r1,%r8
+       ldo 8(%r1), %r1
+       bv %r0(%r1)
+       ldi -EFAULT, %r8