2 * Copyright (c) 2006,2007 Konstantin Belousov
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 #include "linux_assym.h" /* system definitions */
33 #include <machine/asmacros.h> /* miscellaneous asm macros */
34 #include <machine/cputypes.h>
35 #include <machine/pmap.h>
36 #include <machine/specialreg.h>
41 * A stack-based on-fault routine is used for more complex PCB_ONFAULT
42 * situations (such as memcpy/bcopy/bzero). In this case the on-fault
43 * routine must be pushed on the stack.
49 movl PCPU(curthread),%ecx
50 movl TD_PCB(%ecx), %ecx
52 movl $0,PCB_ONFAULT(%ecx)
58 movl $0,PCB_ONFAULT(%ecx)
63 movl PCPU(curthread),%ecx
64 movl TD_PCB(%ecx),%ecx
66 movl $stack_onfault, PCB_ONFAULT(%ecx)
69 cmpl $VM_MAX_USER_ADDRESS-4,%edx
75 movl %eax,PCB_ONFAULT(%ecx)
79 movl PCPU(curthread),%ecx
80 movl TD_PCB(%ecx),%ecx
82 movl $stack_onfault,PCB_ONFAULT(%ecx)
85 cmpl $VM_MAX_USER_ADDRESS-4,%edx
92 movl %eax,PCB_ONFAULT(%ecx)
96 movl PCPU(curthread),%ecx
97 movl TD_PCB(%ecx),%ecx
98 pushl $futex_fault_decx
99 movl $stack_onfault,PCB_ONFAULT(%ecx)
101 cmpl $VM_MAX_USER_ADDRESS-4,%edx
113 movl PCPU(curthread),%ecx
114 movl TD_PCB(%ecx),%ecx
115 movl %eax,PCB_ONFAULT(%ecx)
119 movl PCPU(curthread),%ecx
120 movl TD_PCB(%ecx),%ecx
121 pushl $futex_fault_decx
122 movl $stack_onfault,PCB_ONFAULT(%ecx)
124 cmpl $VM_MAX_USER_ADDRESS-4,%edx
135 movl PCPU(curthread),%ecx
136 movl TD_PCB(%ecx),%ecx
137 pushl $futex_fault_decx
138 movl $stack_onfault,PCB_ONFAULT(%ecx)
140 cmpl $VM_MAX_USER_ADDRESS-4,%edx