cb0eecdf92
aware of SMAP. Reported and tested by: Johannes Lundberg <johalun0@gmail.com>, wulf Sponsored by: The FreeBSD Foundation
228 lines
4.7 KiB
ArmAsm
228 lines
4.7 KiB
ArmAsm
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.inc"
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futex_fault:
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movq $0,PCB_ONFAULT(%r8)
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movl $-EFAULT,%eax
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ret
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ENTRY(futex_xchgl_nosmap)
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movq PCPU(CURPCB),%r8
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movq $futex_fault,PCB_ONFAULT(%r8)
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movq $VM_MAXUSER_ADDRESS-4,%rax
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cmpq %rax,%rsi
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ja futex_fault
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xchgl %edi,(%rsi)
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movl %edi,(%rdx)
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xorl %eax,%eax
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movq %rax,PCB_ONFAULT(%r8)
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ret
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END(futex_xchgl_nosmap)
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ENTRY(futex_xchgl_smap)
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movq PCPU(CURPCB),%r8
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movq $futex_fault,PCB_ONFAULT(%r8)
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movq $VM_MAXUSER_ADDRESS-4,%rax
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cmpq %rax,%rsi
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ja futex_fault
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stac
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xchgl %edi,(%rsi)
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clac
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movl %edi,(%rdx)
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xorl %eax,%eax
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movq %rax,PCB_ONFAULT(%r8)
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ret
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END(futex_xchgl_smap)
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ENTRY(futex_addl_nosmap)
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movq PCPU(CURPCB),%r8
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movq $futex_fault,PCB_ONFAULT(%r8)
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movq $VM_MAXUSER_ADDRESS-4,%rax
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cmpq %rax,%rsi
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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 %edi,(%rsi)
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movl %edi,(%rdx)
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xorl %eax,%eax
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movq %rax,PCB_ONFAULT(%r8)
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ret
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END(futex_addl_nosmap)
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ENTRY(futex_addl_smap)
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movq PCPU(CURPCB),%r8
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movq $futex_fault,PCB_ONFAULT(%r8)
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movq $VM_MAXUSER_ADDRESS-4,%rax
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cmpq %rax,%rsi
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ja futex_fault
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stac
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#ifdef SMP
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lock
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#endif
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xaddl %edi,(%rsi)
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clac
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movl %edi,(%rdx)
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xorl %eax,%eax
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movq %rax,PCB_ONFAULT(%r8)
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ret
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END(futex_addl_smap)
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ENTRY(futex_orl_nosmap)
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movq PCPU(CURPCB),%r8
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movq $futex_fault,PCB_ONFAULT(%r8)
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movq $VM_MAXUSER_ADDRESS-4,%rax
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cmpq %rax,%rsi
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ja futex_fault
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movl (%rsi),%eax
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1: movl %eax,%ecx
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orl %edi,%ecx
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#ifdef SMP
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lock
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#endif
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cmpxchgl %ecx,(%rsi)
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jnz 1b
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movl %eax,(%rdx)
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xorl %eax,%eax
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movq %rax,PCB_ONFAULT(%r8)
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ret
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END(futex_orl_nosmap)
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ENTRY(futex_orl_smap)
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movq PCPU(CURPCB),%r8
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movq $futex_fault,PCB_ONFAULT(%r8)
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movq $VM_MAXUSER_ADDRESS-4,%rax
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cmpq %rax,%rsi
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ja futex_fault
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movl (%rsi),%eax
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1: movl %eax,%ecx
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orl %edi,%ecx
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stac
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#ifdef SMP
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lock
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#endif
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cmpxchgl %ecx,(%rsi)
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clac
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jnz 1b
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movl %eax,(%rdx)
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xorl %eax,%eax
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movq %rax,PCB_ONFAULT(%r8)
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ret
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END(futex_orl_smap)
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ENTRY(futex_andl_nosmap)
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movq PCPU(CURPCB),%r8
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movq $futex_fault,PCB_ONFAULT(%r8)
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movq $VM_MAXUSER_ADDRESS-4,%rax
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cmpq %rax,%rsi
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ja futex_fault
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movl (%rsi),%eax
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1: movl %eax,%ecx
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andl %edi,%ecx
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#ifdef SMP
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lock
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#endif
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cmpxchgl %ecx,(%rsi)
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jnz 1b
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movl %eax,(%rdx)
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xorl %eax,%eax
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movq %rax,PCB_ONFAULT(%r8)
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ret
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END(futex_andl_nosmap)
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ENTRY(futex_andl_smap)
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movq PCPU(CURPCB),%r8
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movq $futex_fault,PCB_ONFAULT(%r8)
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movq $VM_MAXUSER_ADDRESS-4,%rax
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cmpq %rax,%rsi
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ja futex_fault
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movl (%rsi),%eax
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1: movl %eax,%ecx
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andl %edi,%ecx
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stac
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#ifdef SMP
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lock
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#endif
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cmpxchgl %ecx,(%rsi)
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clac
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jnz 1b
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movl %eax,(%rdx)
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xorl %eax,%eax
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movq %rax,PCB_ONFAULT(%r8)
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ret
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END(futex_andl_smap)
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ENTRY(futex_xorl_nosmap)
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movq PCPU(CURPCB),%r8
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movq $futex_fault,PCB_ONFAULT(%r8)
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movq $VM_MAXUSER_ADDRESS-4,%rax
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cmpq %rax,%rsi
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ja futex_fault
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movl (%rsi),%eax
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1: movl %eax,%ecx
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xorl %edi,%ecx
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#ifdef SMP
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lock
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#endif
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cmpxchgl %ecx,(%rsi)
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jnz 1b
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movl %eax,(%rdx)
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xorl %eax,%eax
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movq %rax,PCB_ONFAULT(%r8)
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ret
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END(futex_xorl_nosmap)
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ENTRY(futex_xorl_smap)
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movq PCPU(CURPCB),%r8
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movq $futex_fault,PCB_ONFAULT(%r8)
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movq $VM_MAXUSER_ADDRESS-4,%rax
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cmpq %rax,%rsi
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ja futex_fault
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movl (%rsi),%eax
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1: movl %eax,%ecx
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xorl %edi,%ecx
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stac
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#ifdef SMP
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lock
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#endif
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cmpxchgl %ecx,(%rsi)
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clac
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jnz 1b
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movl %eax,(%rdx)
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xorl %eax,%eax
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movq %rax,PCB_ONFAULT(%r8)
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ret
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END(futex_xorl_smap)
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