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
/*-
|
|
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
|
|
*
|
|
* 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include "linux32_assym.h" /* system definitions */
|
|
#include <machine/asmacros.h> /* miscellaneous asm macros */
|
|
|
|
#include "assym.inc"
|
|
|
|
futex_fault:
|
|
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
|
|
movl (%rsi),%eax
|
|
1: movl %eax,%ecx
|
|
orl %edi,%ecx
|
|
stac
|
|
#ifdef SMP
|
|
lock
|
|
#endif
|
|
cmpxchgl %ecx,(%rsi)
|
|
clac
|
|
jnz 1b
|
|
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
|
|
movl (%rsi),%eax
|
|
1: movl %eax,%ecx
|
|
andl %edi,%ecx
|
|
stac
|
|
#ifdef SMP
|
|
lock
|
|
#endif
|
|
cmpxchgl %ecx,(%rsi)
|
|
clac
|
|
jnz 1b
|
|
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
|
|
movl (%rsi),%eax
|
|
1: movl %eax,%ecx
|
|
xorl %edi,%ecx
|
|
stac
|
|
#ifdef SMP
|
|
lock
|
|
#endif
|
|
cmpxchgl %ecx,(%rsi)
|
|
clac
|
|
jnz 1b
|
|
movl %eax,(%rdx)
|
|
xorl %eax,%eax
|
|
movq %rax,PCB_ONFAULT(%r8)
|
|
ret
|
|
END(futex_xorl_smap)
|