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#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_getparam,function) 38 ANSI_PRAGMA_WEAK(_door_info,function) 39 ANSI_PRAGMA_WEAK(_door_revoke,function) 40 ANSI_PRAGMA_WEAK(_door_setparam,function) 41 ANSI_PRAGMA_WEAK(_door_unbind,function) 42 43 ANSI_PRAGMA_WEAK(door_bind,function) 44 ANSI_PRAGMA_WEAK(door_getparam,function) 45 ANSI_PRAGMA_WEAK(door_info,function) 46 ANSI_PRAGMA_WEAK(door_revoke,function) 47 ANSI_PRAGMA_WEAK(door_setparam,function) 48 ANSI_PRAGMA_WEAK(door_unbind,function) 49 50#include <sys/door.h> 51#include "SYS.h" 52 53/* 54 * Offsets within struct door_results 55 */ 56#define DOOR_COOKIE _MUL(0, CLONGSIZE) 57#define DOOR_DATA_PTR _MUL(1, CLONGSIZE) 58#define DOOR_DATA_SIZE _MUL(2, CLONGSIZE) 59#define DOOR_DESC_PTR _MUL(3, CLONGSIZE) 60#define DOOR_DESC_SIZE _MUL(4, CLONGSIZE) 61#define DOOR_PC _MUL(5, CLONGSIZE) 62#define DOOR_SERVERS _MUL(6, CLONGSIZE) 63#define DOOR_INFO_PTR _MUL(7, CLONGSIZE) 64 65/* 66 * All of the syscalls except door_return() follow the same pattern. The 67 * subcode goes in %r9, after all of the other arguments. 68 */ 69#define DOOR_SYSCALL(name, code) \ 70 ENTRY(name); \ 71 movq $code, %r9; /* subcode */ \ 72 SYSTRAP_RVAL1(door); \ 73 SYSCERROR; \ 74 RET; \ 75 SET_SIZE(name) 76 77 DOOR_SYSCALL(__door_bind, DOOR_BIND) 78 DOOR_SYSCALL(__door_call, DOOR_CALL) 79 DOOR_SYSCALL(__door_create, DOOR_CREATE) 80 DOOR_SYSCALL(__door_getparam, DOOR_GETPARAM) 81 DOOR_SYSCALL(__door_info, DOOR_INFO) 82 DOOR_SYSCALL(__door_revoke, DOOR_REVOKE) 83 DOOR_SYSCALL(__door_setparam, DOOR_SETPARAM) 84 DOOR_SYSCALL(__door_ucred, DOOR_UCRED) 85 DOOR_SYSCALL(__door_unbind, DOOR_UNBIND) 86 DOOR_SYSCALL(__door_unref, DOOR_UNREFSYS) 87 88/* 89 * int 90 * __door_return( 91 * void *data_ptr, 92 * size_t data_size, (in bytes) 93 * door_return_desc_t *door_ptr, (holds returned desc info) 94 * caddr_t stack_base, 95 * size_t stack_size) 96 */ 97 ENTRY(__door_return) 98door_restart: 99 movq $DOOR_RETURN, %r9 /* subcode */ 100 SYSTRAP_RVAL1(door) 101 jb 2f /* errno is set */ 102 /* 103 * On return, we're serving a door_call. Our stack looks like this: 104 * 105 * descriptors (if any) 106 * data (if any) 107 * sp-> struct door_results 108 */ 109 movl DOOR_SERVERS(%rsp), %eax 110 andl %eax, %eax /* test nservers */ 111 jg 1f 112 /* 113 * this is the last server thread - call creation func for more 114 */ 115 movq _daref_(door_server_func), %rax 116 movq 0(%rax), %rax 117 movq DOOR_INFO_PTR(%rsp), %rdi 118 call *%rax /* call create function */ 1191: 120 /* Call the door server function now */ 121 movq DOOR_COOKIE(%rsp), %rdi 122 movq DOOR_DATA_PTR(%rsp), %rsi 123 movq DOOR_DATA_SIZE(%rsp), %rdx 124 movq DOOR_DESC_PTR(%rsp), %rcx 125 movq DOOR_DESC_SIZE(%rsp), %r8 126 movq DOOR_PC(%rsp), %rax 127 call *%rax 128 /* Exit the thread if we return here */ 129 movq $0, %rdi 130 call _thr_terminate 131 /* NOTREACHED */ 1322: 133 /* 134 * Error during door_return call. Repark the thread in the kernel if 135 * the error code is EINTR (or ERESTART) and this lwp is still part 136 * of the same process. 137 */ 138 cmpl $ERESTART, %eax /* ERESTART is same as EINTR */ 139 jne 3f 140 movl $EINTR, %eax 1413: 142 cmpl $EINTR, %eax /* interrupted while waiting? */ 143 jne __cerror /* if not, return the error */ 144 145 call getpid /* get current process id */ 146 movq _daref_(door_create_pid), %rdx 147 movl 0(%rdx), %edx 148 cmpl %eax, %edx /* same process? */ 149 movl $EINTR, %eax /* if no, return EINTR (child of forkall) */ 150 jne __cerror 151 152 movq $0, %rdi /* clear arguments and restart */ 153 movq $0, %rsi 154 movq $0, %rdx 155 jmp door_restart 156 SET_SIZE(__door_return) 157