/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2007 Konstantin Belousov
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "linux_assym.h" /* system definitions */
#include <machine/asmacros.h> /* miscellaneous asm macros */
#include <machine/specialreg.h>
#include "assym.inc"
futex_fault:
testl $CPUID_STDEXT_SMAP,cpu_stdext_feature(%rip)
je 1f
clac
1: movq $0,PCB_ONFAULT(%r8)
movl $EFAULT,%eax
ret
ENTRY(futex_xchgl_nosmap)
movq PCPU(CURPCB),%r8
movq $futex_fault,PCB_ONFAULT(%r8)
movq $VM_MAXUSER_ADDRESS-4,%rax
cmpq %rax,%rsi
ja futex_fault
xchgl %edi,(%rsi)
movl %edi,(%rdx)
xorl %eax,%eax
movq %rax,PCB_ONFAULT(%r8)
ret
END(futex_xchgl_nosmap)
ENTRY(futex_xchgl_smap)
movq PCPU(CURPCB),%r8
movq $futex_fault,PCB_ONFAULT(%r8)
movq $VM_MAXUSER_ADDRESS-4,%rax
cmpq %rax,%rsi
ja futex_fault
stac
xchgl %edi,(%rsi)
clac
movl %edi,(%rdx)
xorl %eax,%eax
movq %rax,PCB_ONFAULT(%r8)
ret
END(futex_xchgl_smap)
ENTRY(futex_addl_nosmap)
movq PCPU(CURPCB),%r8
movq $futex_fault,PCB_ONFAULT(%r8)
movq $VM_MAXUSER_ADDRESS-4,%rax
cmpq %rax,%rsi
ja futex_fault
#ifdef SMP
lock
#endif
xaddl %edi,(%rsi)
movl %edi,(%rdx)
xorl %eax,%eax
movq %rax,PCB_ONFAULT(%r8)
ret
END(futex_addl_nosmap)
ENTRY(futex_addl_smap)
movq PCPU(CURPCB),%r8
movq $futex_fault,PCB_ONFAULT(%r8)
movq $VM_MAXUSER_ADDRESS-4,%rax
cmpq %rax,%rsi
ja futex_fault
stac
#ifdef SMP
lock
#endif
xaddl %edi,(%rsi)
clac
movl %edi,(%rdx)
xorl %eax,%eax
movq %rax,PCB_ONFAULT(%r8)
ret
END(futex_addl_smap)
ENTRY(futex_orl_nosmap)
movq PCPU(CURPCB),%r8
movq $futex_fault,PCB_ONFAULT(%r8)
movq $VM_MAXUSER_ADDRESS-4,%rax
cmpq %rax,%rsi
ja futex_fault
movl (%rsi),%eax
1: movl %eax,%ecx
orl %edi,%ecx
#ifdef SMP
lock
#endif
cmpxchgl %ecx,(%rsi)
jnz 1b
movl %eax,(%rdx)
xorl %eax,%eax
movq %rax,PCB_ONFAULT(%r8)
ret
END(futex_orl_nosmap)
ENTRY(futex_orl_smap)
movq PCPU(CURPCB),%r8
movq $futex_fault,PCB_ONFAULT(%r8)
movq $VM_MAXUSER_ADDRESS-4,%rax
cmpq %rax,%rsi
ja futex_fault
stac
movl (%rsi),%eax
1: movl %eax,%ecx
orl %edi,%ecx
#ifdef SMP
lock
#endif
cmpxchgl %ecx,(%rsi)
jnz 1b
clac
movl %eax,(%rdx)
xorl %eax,%eax
movq %rax,PCB_ONFAULT(%r8)
ret
END(futex_orl_smap)
ENTRY(futex_andl_nosmap)
movq PCPU(CURPCB),%r8
movq $futex_fault,PCB_ONFAULT(%r8)
movq $VM_MAXUSER_ADDRESS-4,%rax
cmpq %rax,%rsi
ja futex_fault
movl (%rsi),%eax
1: movl %eax,%ecx
andl %edi,%ecx
#ifdef SMP
lock
#endif
cmpxchgl %ecx,(%rsi)
jnz 1b
movl %eax,(%rdx)
xorl %eax,%eax
movq %rax,PCB_ONFAULT(%r8)
ret
END(futex_andl_nosmap)
ENTRY(futex_andl_smap)
movq PCPU(CURPCB),%r8
movq $futex_fault,PCB_ONFAULT(%r8)
movq $VM_MAXUSER_ADDRESS-4,%rax
cmpq %rax,%rsi
ja futex_fault
stac
movl (%rsi),%eax
1: movl %eax,%ecx
andl %edi,%ecx
#ifdef SMP
lock
#endif
cmpxchgl %ecx,(%rsi)
jnz 1b
clac
movl %eax,(%rdx)
xorl %eax,%eax
movq %rax,PCB_ONFAULT(%r8)
ret
END(futex_andl_smap)
ENTRY(futex_xorl_nosmap)
movq PCPU(CURPCB),%r8
movq $futex_fault,PCB_ONFAULT(%r8)
movq $VM_MAXUSER_ADDRESS-4,%rax
cmpq %rax,%rsi
ja futex_fault
movl (%rsi),%eax
1: movl %eax,%ecx
xorl %edi,%ecx
#ifdef SMP
lock
#endif
cmpxchgl %ecx,(%rsi)
jnz 1b
movl %eax,(%rdx)
xorl %eax,%eax
movq %rax,PCB_ONFAULT(%r8)
ret
END(futex_xorl_nosmap)
ENTRY(futex_xorl_smap)
movq PCPU(CURPCB),%r8
movq $futex_fault,PCB_ONFAULT(%r8)
movq $VM_MAXUSER_ADDRESS-4,%rax
cmpq %rax,%rsi
ja futex_fault
stac
movl (%rsi),%eax
1: movl %eax,%ecx
xorl %edi,%ecx
#ifdef SMP
lock
#endif
cmpxchgl %ecx,(%rsi)
jnz 1b
clac
movl %eax,(%rdx)
xorl %eax,%eax
movq %rax,PCB_ONFAULT(%r8)
ret
END(futex_xorl_smap)
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