1 /* $NetBSD: copystr.S,v 1.8 2002/10/13 14:54:48 bjh21 Exp $ */
4 * Copyright (c) 1995 Mark Brinicombe.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by Mark Brinicombe.
18 * 4. The name of the company nor the name of the author may be used to
19 * endorse or promote products derived from this software without specific
20 * prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
23 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
26 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
27 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
28 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * optimised and fault protected copystr functions
42 #include <machine/asm.h>
43 #include <machine/armreg.h>
44 __FBSDID("$FreeBSD$");
46 #include <sys/errno.h>
51 #define GET_PCB(tmp) \
52 mrc p15, 0, tmp, c13, c0, 4; \
53 add tmp, tmp, #(TD_PCB)
55 #define SAVE_REGS stmfd sp!, {r4-r6}
56 #define RESTORE_REGS ldmfd sp!, {r4-r6}
59 * r0 - user space address
60 * r1 - kernel space address
64 * Copy string from user space to kernel space
71 moveq r0, #ENAMETOOLONG
74 ldr r12, =VM_MAXUSER_ADDRESS
84 adr r5, .Lcopystrfault
85 str r5, [r4, #PCB_ONFAULT]
90 ldrbt r5, [r0], #0x0001
91 add r6, r6, #0x00000001
93 strb r5, [r1], #0x0001
98 str r0, [r4, #PCB_ONFAULT]
101 moveq r0, #0x00000000
102 movne r0, #ENAMETOOLONG
104 2: teq r3, #0x00000000
111 /* A fault occurred during the copy */
114 str r1, [r4, #PCB_ONFAULT]
123 adr r0, Lcopystrpcbfaulttext
124 bic sp, sp, #7 /* align stack to 8 bytes */
127 Lcopystrpcbfaulttext:
128 .asciz "No valid PCB during copyinoutstr() addr1=%08x addr2=%08x\n"