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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22/* 23 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27#pragma ident "%Z%%M% %I% %E% SMI" 28 29 .file "%M%" 30 31#include <sys/asm_linkage.h> 32 33 /* 34 * weak aliases for public interfaces 35 */ 36 ANSI_PRAGMA_WEAK(_door_bind,function) 37 ANSI_PRAGMA_WEAK(_door_call,function) 38 ANSI_PRAGMA_WEAK(_door_getparam,function) 39 ANSI_PRAGMA_WEAK(_door_info,function) 40 ANSI_PRAGMA_WEAK(_door_revoke,function) 41 ANSI_PRAGMA_WEAK(_door_setparam,function) 42 ANSI_PRAGMA_WEAK(_door_unbind,function) 43 44 ANSI_PRAGMA_WEAK(door_bind,function) 45 ANSI_PRAGMA_WEAK(door_call,function) 46 ANSI_PRAGMA_WEAK(door_getparam,function) 47 ANSI_PRAGMA_WEAK(door_info,function) 48 ANSI_PRAGMA_WEAK(door_revoke,function) 49 ANSI_PRAGMA_WEAK(door_setparam,function) 50 ANSI_PRAGMA_WEAK(door_unbind,function) 51 52#include <sys/door.h> 53#include "SYS.h" 54 55/* 56 * Offsets within struct door_results 57 */ 58#define DOOR_COOKIE _MUL(0, CLONGSIZE) 59#define DOOR_DATA_PTR _MUL(1, CLONGSIZE) 60#define DOOR_DATA_SIZE _MUL(2, CLONGSIZE) 61#define DOOR_DESC_PTR _MUL(3, CLONGSIZE) 62#define DOOR_DESC_SIZE _MUL(4, CLONGSIZE) 63#define DOOR_PC _MUL(5, CLONGSIZE) 64#define DOOR_SERVERS _MUL(6, CLONGSIZE) 65#define DOOR_INFO_PTR _MUL(7, CLONGSIZE) 66 67/* 68 * All of the syscalls except door_return() follow the same pattern. The 69 * subcode goes in %r9, after all of the other arguments. 70 */ 71#define DOOR_SYSCALL(name, code) \ 72 ENTRY(name); \ 73 movq $code, %r9; /* subcode */ \ 74 SYSTRAP_RVAL1(door); \ 75 SYSCERROR; \ 76 RET; \ 77 SET_SIZE(name) 78 79 DOOR_SYSCALL(__door_bind, DOOR_BIND) 80 DOOR_SYSCALL(__door_call, DOOR_CALL) 81 DOOR_SYSCALL(__door_create, DOOR_CREATE) 82 DOOR_SYSCALL(__door_getparam, DOOR_GETPARAM) 83 DOOR_SYSCALL(__door_info, DOOR_INFO) 84 DOOR_SYSCALL(__door_revoke, DOOR_REVOKE) 85 DOOR_SYSCALL(__door_setparam, DOOR_SETPARAM) 86 DOOR_SYSCALL(__door_ucred, DOOR_UCRED) 87 DOOR_SYSCALL(__door_unbind, DOOR_UNBIND) 88 DOOR_SYSCALL(__door_unref, DOOR_UNREFSYS) 89 90/* 91 * int 92 * __door_return( 93 * void *data_ptr, 94 * size_t data_size, (in bytes) 95 * door_return_desc_t *door_ptr, (holds returned desc info) 96 * caddr_t stack_base, 97 * size_t stack_size) 98 */ 99 ENTRY(__door_return) 100door_restart: 101 movq $DOOR_RETURN, %r9 /* subcode */ 102 SYSTRAP_RVAL1(door) 103 jb 2f /* errno is set */ 104 /* 105 * On return, we're serving a door_call. Our stack looks like this: 106 * 107 * descriptors (if any) 108 * data (if any) 109 * sp-> struct door_results 110 */ 111 movl DOOR_SERVERS(%rsp), %eax 112 andl %eax, %eax /* test nservers */ 113 jg 1f 114 /* 115 * this is the last server thread - call creation func for more 116 */ 117 movq _daref_(door_server_func), %rax 118 movq 0(%rax), %rax 119 movq DOOR_INFO_PTR(%rsp), %rdi 120 call *%rax /* call create function */ 1211: 122 /* Call the door server function now */ 123 movq DOOR_COOKIE(%rsp), %rdi 124 movq DOOR_DATA_PTR(%rsp), %rsi 125 movq DOOR_DATA_SIZE(%rsp), %rdx 126 movq DOOR_DESC_PTR(%rsp), %rcx 127 movq DOOR_DESC_SIZE(%rsp), %r8 128 movq DOOR_PC(%rsp), %rax 129 call *%rax 130 /* Exit the thread if we return here */ 131 movq $0, %rdi 132 call _thr_terminate 133 /* NOTREACHED */ 1342: 135 /* 136 * Error during door_return call. Repark the thread in the kernel if 137 * the error code is EINTR (or ERESTART) and this lwp is still part 138 * of the same process. 139 */ 140 cmpl $ERESTART, %eax /* ERESTART is same as EINTR */ 141 jne 3f 142 movl $EINTR, %eax 1433: 144 cmpl $EINTR, %eax /* interrupted while waiting? */ 145 jne __cerror /* if not, return the error */ 146 147 call _private_getpid /* get current process id */ 148 movq _daref_(door_create_pid), %rdx 149 movl 0(%rdx), %edx 150 cmpl %eax, %edx /* same process? */ 151 movl $EINTR, %eax /* if no, return EINTR (child of forkall) */ 152 jne __cerror 153 154 movq $0, %rdi /* clear arguments and restart */ 155 movq $0, %rsi 156 movq $0, %rdx 157 jmp door_restart 158 SET_SIZE(__door_return) 159