1 /* $NetBSD: SYS.h,v 1.15 2013/08/19 22:13:34 matt Exp $ */ 2 3 /*- 4 * Copyright (c) 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * William Jolitz. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * from: @(#)SYS.h 5.5 (Berkeley) 5/7/91 35 */ 36 37 #define _TEXT_SECTION .section .text.hot, "ax" 38 39 #include <machine/asm.h> 40 #include <sys/syscall.h> 41 #include <arm/swi.h> 42 43 #ifndef __STDC__ 44 #error __STDC__ not defined 45 #endif 46 47 #if !defined(__thumb__) 48 #define SYSTRAP(x) svc #SWI_OS_NETBSD | SYS_ ## x 49 #else 50 .macro emitsvc x 51 mov ip, r0 52 .ifeq \x / 256 53 movs r0, #\x 54 .else 55 #if defined(_ARM_ARCH_7) 56 movw r0, #\x 57 #else 58 .ifeq (\x & 3) 59 movs r0, #(\x / 4) 60 lsls r0, r0, #3 61 .else 62 .ifeq (\x & 1) 63 movs r0, #(\x / 2) 64 lsls r0, r0, #1 65 .else 66 movs r0, #(\x / 256) 67 lsls r0, r0, #8 68 adds r0, r0, #(\x & 255) 69 .endif 70 .endif 71 #endif /* !_ARM_ARCH_7 */ 72 .endif 73 svc #255 74 .endm 75 #define SYSTRAP(x) emitsvc SYS_ ## x 76 #endif /* __thumb__ */ 77 78 #define CERROR _C_LABEL(__cerror) 79 #define CURBRK _C_LABEL(__curbrk) 80 81 #define _SYSCALL_NOERROR(x,y) \ 82 ENTRY(x); \ 83 SYSTRAP(y) 84 85 #if !defined(__thumb__) || defined(_ARM_ARCH_T2) 86 #define _INVOKE_CERROR() bcs CERROR 87 #else 88 #define _INVOKE_CERROR() \ 89 bcc 86f; push {r3,lr}; bl CERROR; pop {r3,pc}; 86: 90 #endif 91 #define _SYSCALL(x, y) \ 92 _SYSCALL_NOERROR(x,y); \ 93 _INVOKE_CERROR() 94 95 #define SYSCALL_NOERROR(x) \ 96 _SYSCALL_NOERROR(x,x) 97 98 #define SYSCALL(x) \ 99 _SYSCALL(x,x) 100 101 102 #define PSEUDO_NOERROR(x,y) \ 103 _SYSCALL_NOERROR(x,y); \ 104 RET; \ 105 END(x) 106 107 #define PSEUDO(x,y) \ 108 _SYSCALL(x,y); \ 109 RET; \ 110 END(x) 111 112 113 #define RSYSCALL_NOERROR(x) \ 114 PSEUDO_NOERROR(x,x) 115 116 #define RSYSCALL(x) \ 117 PSEUDO(x,x) 118 119 #ifdef WEAK_ALIAS 120 #define WSYSCALL(weak,strong) \ 121 WEAK_ALIAS(weak,strong); \ 122 PSEUDO(strong,weak) 123 #else 124 #define WSYSCALL(weak,strong) \ 125 PSEUDO(weak,weak) 126 #endif 127 128 .hidden CERROR 129 .globl CERROR 130