1181e367e0
Note that this has been compiled on some systems, cats, IQ80310, IPAQ, netwinder and shark (note that shark's build is currently broken due to other reasons), but only actually run on cats. Shark doesn't make use of the functionality as I believe there has to be a correlation between OFW and the kernel tables so that calls into OFW work.
213 lines
4.8 KiB
ArmAsm
213 lines
4.8 KiB
ArmAsm
/* $NetBSD: copystr.S,v 1.3 2002/03/03 11:22:59 chris Exp $ */
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/*
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* Copyright (c) 1995 Mark Brinicombe.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Mark Brinicombe.
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* 4. The name of the company nor the name of the author may be used to
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* endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* copystr.S
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*
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* optimised and fault protected copystr functions
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*
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* Created : 16/05/95
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*/
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#include "assym.h"
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#include <machine/asm.h>
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#include <sys/errno.h>
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.text
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.align 0
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Lcurpcb:
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.word _C_LABEL(curpcb)
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Lvm_min_address:
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.word VM_MIN_ADDRESS
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Lvm_maxuser_address:
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.word VM_MAXUSER_ADDRESS
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Lvm_maxkern_address:
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.word _C_LABEL(pmap_curmaxkvaddr)
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/*
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* r0 - from
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* r1 - to
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* r2 - maxlens
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* r3 - lencopied
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*
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* Copy string from r0 to r1
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*/
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ENTRY(copystr)
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stmfd sp!, {r4-r5} /* stack is 8 byte aligned */
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teq r2, #0x00000000
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mov r5, #0x00000000
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moveq r0, #ENAMETOOLONG
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beq Lcopystrexit
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Lcopystr_loop:
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ldrb r4, [r0], #0x0001
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strb r4, [r1], #0x0001
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add r5, r5, #0x00000001
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teq r4, #0x00000000
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teqne r5, r2
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bne Lcopystr_loop
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teq r4, #0x00000000
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moveq r0, #0x00000000
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movne r0, #ENAMETOOLONG
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Lcopystrexit:
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teq r3, #0x00000000
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strne r5, [r3]
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ldmfd sp!, {r4-r5} /* stack is 8 byte aligned */
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mov pc, lr
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/*
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* r0 - user space address
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* r1 - kernel space address
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* r2 - maxlens
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* r3 - lencopied
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*
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* Copy string from user space to kernel space
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*/
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ENTRY(copyinstr)
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stmfd sp!, {r4-r6}
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/* Validate user and kernel addresses */
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ldr r4, Lvm_min_address
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cmp r0, r4
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bcc Lbadaddress
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ldr r4, Lvm_maxuser_address
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cmp r0, r4
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bcs Lbadaddress
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cmp r1, r4
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bcc Lbadaddress
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ldr r4, Lvm_maxkern_address
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ldr r5, [r4]
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cmp r1, r5
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bcs Lbadaddress
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/* Do the actual copy */
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b do_copyinoutstr
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/*
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* r0 - kernel space address
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* r1 - user space address
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* r2 - maxlens
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* r3 - lencopied
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*
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* Copy string from kernel space to user space
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*/
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ENTRY(copyoutstr)
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stmfd sp!, {r4-r6} /* stack isn't 8 byte aligned */
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/* Validate user and kernel addresses */
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ldr r4, Lvm_min_address
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cmp r1, r4
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bcc Lbadaddress
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ldr r4, Lvm_maxuser_address
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cmp r1, r4
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bcs Lbadaddress
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cmp r0, r4
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bcc Lbadaddress
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ldr r4, Lvm_maxkern_address
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ldr r5, [r4]
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cmp r0, r5
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bcs Lbadaddress
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/* Do the actual copy */
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do_copyinoutstr:
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teq r2, #0x00000000
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mov r6, #0x00000000
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moveq r0, #ENAMETOOLONG
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beq Lcopyinoutstrexit
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ldr r4, Lcurpcb
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ldr r4, [r4]
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#ifdef DIAGNOSTIC
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teq r4, #0x00000000
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beq Lcopystrpcbfault
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#endif
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add r5, pc, #Lcopystrfault - . - 8
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str r5, [r4, #PCB_ONFAULT]
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Lcopyinoutstr_loop:
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ldrb r5, [r0], #0x0001
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strb r5, [r1], #0x0001
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add r6, r6, #0x00000001
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teq r5, #0x00000000
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teqne r6, r2
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bne Lcopyinoutstr_loop
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mov r0, #0x00000000
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str r0, [r4, #PCB_ONFAULT]
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teq r5, #0x00000000
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moveq r0, #0x00000000
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movne r0, #ENAMETOOLONG
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Lcopyinoutstrexit:
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teq r3, #0x00000000
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strne r6, [r3]
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ldmfd sp!, {r4-r6} /* stack is 8 byte aligned */
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mov pc, lr
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/* A fault occurred during the copy */
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Lcopystrfault:
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mov r0, #0x00000000
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str r0, [r4, #PCB_ONFAULT]
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/* FALLTHROUGH */
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/* Source or Destination address was bad so fail */
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Lbadaddress:
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ldmfd sp!, {r4-r6} /* stack is 8 byte aligned */
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mov r0, #EFAULT
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mov pc, lr
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#ifdef DIAGNOSTIC
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Lcopystrpcbfault:
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mov r2, r1
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mov r1, r0
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add r0, pc, #Lcopystrpcbfaulttext - . - 8
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bic sp, sp, #7 /* align stack to 8 bytes */
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b _C_LABEL(panic)
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Lcopystrpcbfaulttext:
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.asciz "No valid PCB during copyinoutstr() addr1=%08x addr2=%08x\n"
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.align 0
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#endif
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