linux_support.s revision 346812
1/*- 2 * Copyright (c) 2006,2007 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/i386/linux/linux_support.s 346812 2019-04-28 09:53:08Z dchagin $ 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_decx: 38 movl PCPU(CURPCB),%ecx 39futex_fault: 40 movl $0,PCB_ONFAULT(%ecx) 41 movl $-EFAULT,%eax 42 ret 43 44ENTRY(futex_xchgl) 45 movl PCPU(CURPCB),%ecx 46 movl $futex_fault,PCB_ONFAULT(%ecx) 47 movl 4(%esp),%eax 48 movl 8(%esp),%edx 49 cmpl $VM_MAXUSER_ADDRESS-4,%edx 50 ja futex_fault 51 xchgl %eax,(%edx) 52 movl 12(%esp),%edx 53 movl %eax,(%edx) 54 xorl %eax,%eax 55 movl %eax,PCB_ONFAULT(%ecx) 56 ret 57 58ENTRY(futex_addl) 59 movl PCPU(CURPCB),%ecx 60 movl $futex_fault,PCB_ONFAULT(%ecx) 61 movl 4(%esp),%eax 62 movl 8(%esp),%edx 63 cmpl $VM_MAXUSER_ADDRESS-4,%edx 64 ja futex_fault 65#ifdef SMP 66 lock 67#endif 68 xaddl %eax,(%edx) 69 movl 12(%esp),%edx 70 movl %eax,(%edx) 71 xorl %eax,%eax 72 movl %eax,PCB_ONFAULT(%ecx) 73 ret 74 75ENTRY(futex_orl) 76 movl PCPU(CURPCB),%ecx 77 movl $futex_fault_decx,PCB_ONFAULT(%ecx) 78 movl 8(%esp),%edx 79 cmpl $VM_MAXUSER_ADDRESS-4,%edx 80 ja futex_fault 81 movl (%edx),%eax 821: movl %eax,%ecx 83 orl 4(%esp),%ecx 84#ifdef SMP 85 lock 86#endif 87 cmpxchgl %ecx,(%edx) 88 jnz 1b 89futex_tail: 90 movl 12(%esp),%edx 91 movl %eax,(%edx) 92 xorl %eax,%eax 93 movl PCPU(CURPCB),%ecx 94 movl %eax,PCB_ONFAULT(%ecx) 95 ret 96 97ENTRY(futex_andl) 98 movl PCPU(CURPCB),%ecx 99 movl $futex_fault_decx,PCB_ONFAULT(%ecx) 100 movl 8(%esp),%edx 101 cmpl $VM_MAXUSER_ADDRESS-4,%edx 102 ja futex_fault 103 movl (%edx),%eax 1041: movl %eax,%ecx 105 andl 4(%esp),%ecx 106#ifdef SMP 107 lock 108#endif 109 cmpxchgl %ecx,(%edx) 110 jnz 1b 111 jmp futex_tail 112 113ENTRY(futex_xorl) 114 movl PCPU(CURPCB),%ecx 115 movl $futex_fault_decx,PCB_ONFAULT(%ecx) 116 movl 8(%esp),%edx 117 cmpl $VM_MAXUSER_ADDRESS-4,%edx 118 ja futex_fault 119 movl (%edx),%eax 1201: movl %eax,%ecx 121 xorl 4(%esp),%ecx 122#ifdef SMP 123 lock 124#endif 125 cmpxchgl %ecx,(%edx) 126 jnz 1b 127 jmp futex_tail 128