128 lines
3.3 KiB
ArmAsm
128 lines
3.3 KiB
ArmAsm
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/*-
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* Copyright (c) 2006,2007 Konstantin Belousov
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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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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR 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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* $FreeBSD$
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*/
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#include "linux_assym.h" /* system definitions */
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#include <machine/asmacros.h> /* miscellaneous asm macros */
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#include "assym.s"
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futex_fault_decx:
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movl PCPU(CURPCB),%ecx
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futex_fault:
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movl $0,PCB_ONFAULT(%ecx)
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movl $-EFAULT,%eax
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ret
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ENTRY(futex_xchgl)
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movl PCPU(CURPCB),%ecx
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movl $futex_fault,PCB_ONFAULT(%ecx)
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movl 4(%esp),%eax
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movl 8(%esp),%edx
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cmpl $VM_MAXUSER_ADDRESS-4,%edx
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ja futex_fault
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xchgl %eax,(%edx)
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movl 12(%esp),%edx
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movl %eax,(%edx)
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xorl %eax,%eax
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movl %eax,PCB_ONFAULT(%ecx)
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ret
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ENTRY(futex_addl)
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movl PCPU(CURPCB),%ecx
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movl $futex_fault,PCB_ONFAULT(%ecx)
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movl 4(%esp),%eax
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movl 8(%esp),%edx
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cmpl $VM_MAXUSER_ADDRESS-4,%edx
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ja futex_fault
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#ifdef SMP
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lock
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#endif
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xaddl %eax,(%edx)
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movl 12(%esp),%edx
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movl %eax,(%edx)
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xorl %eax,%eax
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movl %eax,PCB_ONFAULT(%ecx)
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ret
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ENTRY(futex_orl)
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movl PCPU(CURPCB),%ecx
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movl $futex_fault_decx,PCB_ONFAULT(%ecx)
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movl 8(%esp),%edx
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cmpl $VM_MAXUSER_ADDRESS-4,%edx
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ja futex_fault
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movl (%edx),%eax
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1: movl %eax,%ecx
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orl 4(%esp),%ecx
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#ifdef SMP
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lock
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#endif
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cmpxchgl %ecx,(%edx)
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jnz 1b
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futex_tail:
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movl 12(%esp),%edx
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movl %eax,(%edx)
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xorl %eax,%eax
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movl PCPU(CURPCB),%ecx
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movl %eax,PCB_ONFAULT(%ecx)
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ret
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ENTRY(futex_andl)
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movl PCPU(CURPCB),%ecx
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movl $futex_fault_decx,PCB_ONFAULT(%ecx)
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movl 8(%esp),%edx
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cmpl $VM_MAXUSER_ADDRESS-4,%edx
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ja futex_fault
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movl (%edx),%eax
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1: movl %eax,%ecx
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andl 4(%esp),%ecx
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#ifdef SMP
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lock
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#endif
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cmpxchgl %ecx,(%edx)
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jnz 1b
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jmp futex_tail
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ENTRY(futex_xorl)
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movl PCPU(CURPCB),%ecx
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movl $futex_fault_decx,PCB_ONFAULT(%ecx)
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movl 8(%esp),%edx
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cmpl $VM_MAXUSER_ADDRESS-4,%edx
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ja futex_fault
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movl (%edx),%eax
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1: movl %eax,%ecx
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xorl 4(%esp),%ecx
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#ifdef SMP
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lock
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#endif
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cmpxchgl %ecx,(%edx)
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jnz 1b
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jmp futex_tail
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