1/*- 2 * Copyright (c) 2007 Konstantin Belousov 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: stable/11/sys/amd64/linux/linux_support.s 337650 2018-08-11 17:52:58Z kib $ 30 */ 31 32#include "linux_assym.h" /* system definitions */ 33#include <machine/asmacros.h> /* miscellaneous asm macros */ 34 35#include "assym.s" 36 37futex_fault: 38 movq $0,PCB_ONFAULT(%r8) 39 movl $-EFAULT,%eax 40 ret 41 42ENTRY(futex_xchgl) 43 movq PCPU(CURPCB),%r8 44 movq $futex_fault,PCB_ONFAULT(%r8) 45 movq $VM_MAXUSER_ADDRESS-4,%rax 46 cmpq %rax,%rsi 47 ja futex_fault 48 xchgl %edi,(%rsi) 49 movl %edi,(%rdx) 50 xorl %eax,%eax 51 movq %rax,PCB_ONFAULT(%r8) 52 ret 53END(futex_xchgl) 54 55ENTRY(futex_addl) 56 movq PCPU(CURPCB),%r8 57 movq $futex_fault,PCB_ONFAULT(%r8) 58 movq $VM_MAXUSER_ADDRESS-4,%rax 59 cmpq %rax,%rsi 60 ja futex_fault 61#ifdef SMP 62 lock 63#endif 64 xaddl %edi,(%rsi) 65 movl %edi,(%rdx) 66 xorl %eax,%eax 67 movq %rax,PCB_ONFAULT(%r8) 68 ret 69END(futex_addl) 70 71ENTRY(futex_orl) 72 movq PCPU(CURPCB),%r8 73 movq $futex_fault,PCB_ONFAULT(%r8) 74 movq $VM_MAXUSER_ADDRESS-4,%rax 75 cmpq %rax,%rsi 76 ja futex_fault 77 movl (%rsi),%eax 781: movl %eax,%ecx 79 orl %edi,%ecx 80#ifdef SMP 81 lock 82#endif 83 cmpxchgl %ecx,(%rsi) 84 jnz 1b 85 movl %eax,(%rdx) 86 xorl %eax,%eax 87 movq %rax,PCB_ONFAULT(%r8) 88 ret 89END(futex_orl) 90 91ENTRY(futex_andl) 92 movq PCPU(CURPCB),%r8 93 movq $futex_fault,PCB_ONFAULT(%r8) 94 movq $VM_MAXUSER_ADDRESS-4,%rax 95 cmpq %rax,%rsi 96 ja futex_fault 97 movl (%rsi),%eax 981: movl %eax,%ecx 99 andl %edi,%ecx 100#ifdef SMP 101 lock 102#endif 103 cmpxchgl %ecx,(%rsi) 104 jnz 1b 105 movl %eax,(%rdx) 106 xorl %eax,%eax 107 movq %rax,PCB_ONFAULT(%r8) 108 ret 109END(futex_andl) 110 111ENTRY(futex_xorl) 112 movq PCPU(CURPCB),%r8 113 movq $futex_fault,PCB_ONFAULT(%r8) 114 movq $VM_MAXUSER_ADDRESS-4,%rax 115 cmpq %rax,%rsi 116 ja futex_fault 117 movl (%rsi),%eax 1181: movl %eax,%ecx 119 xorl %edi,%ecx 120#ifdef SMP 121 lock 122#endif 123 cmpxchgl %ecx,(%rsi) 124 jnz 1b 125 movl %eax,(%rdx) 126 xorl %eax,%eax 127 movq %rax,PCB_ONFAULT(%r8) 128 ret 129END(futex_xorl) 130