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 * 4. 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
94 movl
%eax
,PCB_ONFAULT
(%ecx
)
98 movl PCPU
(curthread
),%ecx
99 movl TD_PCB
(%ecx
),%ecx
100 pushl $futex_fault_decx
101 movl $stack_onfault
,PCB_ONFAULT
(%ecx
)
103 cmpl $VM_MAX_USER_ADDRESS-
4,%edx
117 movl PCPU
(curthread
),%ecx
118 movl
%eax
,PCB_ONFAULT
(%ecx
)
122 movl PCPU
(curthread
),%ecx
123 movl TD_PCB
(%ecx
),%ecx
124 pushl $futex_fault_decx
125 movl $stack_onfault
,PCB_ONFAULT
(%ecx
)
127 cmpl $VM_MAX_USER_ADDRESS-
4,%edx
140 movl PCPU
(curthread
),%ecx
141 movl TD_PCB
(%ecx
),%ecx
142 pushl $futex_fault_decx
143 movl $stack_onfault
,PCB_ONFAULT
(%ecx
)
145 cmpl $VM_MAX_USER_ADDRESS-
4,%edx