1/* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22/* 23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27/* Copyright (c) 1988 AT&T */ 28/* All Rights Reserved */ 29 30/* 31 * C library -- int syscall(int sysnum, ...); 32 * C library -- int __systemcall(sysret_t *, int sysnum, ...); 33 * 34 * Interpret a given system call 35 * 36 * This version handles up to 8 'long' arguments to a system call. 37 * 38 * Even though indirect system call support exists in the SPARC 39 * 32-bit kernel, we want to eliminate it in a future release, 40 * so the real trap for the desired system call is issued right here. 41 * 42 * Even though %g5 can be used as a scratch register for sparcv9, we don't 43 * use it here because this code is shared between sparcv8 and sparcv9. 44 */ 45 46 .file "syscall.s" 47 48#include "SYS.h" 49 50 ANSI_PRAGMA_WEAK(syscall,function) 51 52 ENTRY(syscall) 53 save %sp, -SA(MINFRAME + 2*CLONGSIZE), %sp 54 ldn [%fp + STACK_BIAS + MINFRAME], %o5 ! arg 5 55 mov %i3, %o2 ! arg 2 56 ldn [%fp + STACK_BIAS + MINFRAME + CLONGSIZE], %g1 57 mov %i4, %o3 ! arg 3 58 stn %g1, [%sp + STACK_BIAS + MINFRAME] ! arg 6 59 mov %i5, %o4 ! arg 4 60 ldn [%fp + STACK_BIAS + MINFRAME + 2*CLONGSIZE], %g1 61 mov %i1, %o0 ! arg 0 62 stn %g1, [%sp + STACK_BIAS + MINFRAME + CLONGSIZE] ! arg 7 63 mov %i2, %o1 ! arg 1 64 mov %i0, %g1 ! sysnum 65 ta SYSCALL_TRAPNUM 66 bcc,a,pt %icc, 1f 67 sra %o0, 0, %i0 ! (int) cast 68 restore %o0, 0, %o0 69 ba __cerror 70 nop 711: 72 ret 73 restore 74 SET_SIZE(syscall) 75 76/* 77 * Same as _syscall(), but restricted to 6 syscall arguments 78 * so it doesn't need to incur the overhead of a register window. 79 * Implemented for use only within libc; symbol is not exported. 80 */ 81 ENTRY(_syscall6) 82 mov %o0, %g1 /* sysnum */ 83 mov %o1, %o0 /* syscall args */ 84 mov %o2, %o1 85 mov %o3, %o2 86 mov %o4, %o3 87 mov %o5, %o4 88 ldn [%sp + STACK_BIAS + MINFRAME], %o5 89 ta SYSCALL_TRAPNUM 90 SYSCERROR 91 retl 92 sra %o0, 0, %o0 /* (int) cast */ 93 SET_SIZE(_syscall6) 94 95 ENTRY(__systemcall) 96 save %sp, -SA(MINFRAME + 2*CLONGSIZE), %sp 97 ldn [%fp + STACK_BIAS + MINFRAME], %o4 ! arg 4 98 mov %i3, %o1 ! arg 1 99 ldn [%fp + STACK_BIAS + MINFRAME + CLONGSIZE], %o5 ! arg5 100 mov %i4, %o2 ! arg 2 101 ldn [%fp + STACK_BIAS + MINFRAME + 2*CLONGSIZE], %g1 102 mov %i5, %o3 ! arg 3 103 stn %g1, [%sp + STACK_BIAS + MINFRAME] ! arg 6 104 mov %i2, %o0 ! arg 0 105 ldn [%fp + STACK_BIAS + MINFRAME + 3*CLONGSIZE], %g1 106 stn %g1, [%sp + STACK_BIAS + MINFRAME + CLONGSIZE] ! arg7 107 mov %i1, %g1 ! sysnum 108 ta SYSCALL_TRAPNUM 109 bcc,pt %icc, 1f 110 mov -1, %g1 111 stn %g1, [%i0] /* error */ 112 ba 2f 113 stn %g1, [%i0 + CLONGSIZE] 1141: 115 stn %o0, [%i0] /* no error */ 116 clr %o0 117 stn %o1, [%i0 + CLONGSIZE] 1182: 119 ret 120 restore %o0, 0, %o0 121 SET_SIZE(__systemcall) 122 123/* 124 * Same as __systemcall(), but restricted to 6 syscall arguments 125 * so it doesn't need to incur the overhead of a register window. 126 * Implemented for use only within libc; symbol is not exported. 127 */ 128 ENTRY(__systemcall6) 129 stn %o0, [%sp + SAVE_OFFSET] /* sysret address */ 130 mov %o1, %g1 /* sysnum */ 131 mov %o2, %o0 /* syscall args */ 132 mov %o3, %o1 133 mov %o4, %o2 134 mov %o5, %o3 135 ldn [%sp + STACK_BIAS + MINFRAME], %o4 136 ldn [%sp + STACK_BIAS + MINFRAME + CLONGSIZE], %o5 137 ta SYSCALL_TRAPNUM 138 bcs,pn %icc, 1f 139 ldn [%sp + SAVE_OFFSET], %g1 140 stn %o0, [%g1] /* no error */ 141 stn %o1, [%g1 + CLONGSIZE] 142 retl 143 clr %o0 1441: 145 mov -1, %o1 /* error */ 146 stn %o1, [%g1] 147 retl 148 stn %o1, [%g1 + CLONGSIZE] 149 SET_SIZE(__systemcall6) 150