2 * Linux/PA-RISC Project (http://www.parisc-linux.org/)
4 * Copyright (C) 2004 Randolph Chung <tausq@debian.org>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2, or (at your option)
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 * Fixup routines for kernel exception handling.
22 #include <asm/asm-offsets.h>
23 #include <asm/assembly.h>
24 #include <asm/errno.h>
27 .macro get_fault_ip t1 t2
28 addil LT%__per_cpu_offset,%r27
29 LDREG RT%__per_cpu_offset(%r1),\t1
30 /* t2 = smp_processor_id() */
36 /* t2 = &__per_cpu_offset[smp_processor_id()]; */
38 addil LT%per_cpu__exception_data,%r27
39 LDREG RT%per_cpu__exception_data(%r1),\t1
40 /* t1 = &__get_cpu_var(exception_data) */
42 /* t1 = t1->fault_ip */
43 LDREG EXCDATA_IP(\t1), \t1
46 .macro get_fault_ip t1 t2
47 /* t1 = &__get_cpu_var(exception_data) */
48 addil LT%per_cpu__exception_data,%r27
49 LDREG RT%per_cpu__exception_data(%r1),\t2
50 /* t1 = t2->fault_ip */
51 LDREG EXCDATA_IP(\t2), \t1
60 /* get_user() fixups, store -EFAULT in r8, and 0 in r9 */
61 .export fixup_get_user_skip_1
62 fixup_get_user_skip_1:
69 .export fixup_get_user_skip_2
70 fixup_get_user_skip_2:
77 /* put_user() fixups, store -EFAULT in r8 */
78 .export fixup_put_user_skip_1
79 fixup_put_user_skip_1:
85 .export fixup_put_user_skip_2
86 fixup_put_user_skip_2: