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.h" 32#include <sys/door.h> 33 34 /* 35 * weak aliases for public interfaces 36 */ 37 ANSI_PRAGMA_WEAK2(door_bind,__door_bind,function) 38 ANSI_PRAGMA_WEAK2(door_getparam,__door_getparam,function) 39 ANSI_PRAGMA_WEAK2(door_info,__door_info,function) 40 ANSI_PRAGMA_WEAK2(door_revoke,__door_revoke,function) 41 ANSI_PRAGMA_WEAK2(door_setparam,__door_setparam,function) 42 ANSI_PRAGMA_WEAK2(door_unbind,__door_unbind,function) 43 44/* 45 * Offsets within struct door_results 46 */ 47#define DOOR_COOKIE _MUL(0, CLONGSIZE) 48#define DOOR_DATA_PTR _MUL(1, CLONGSIZE) 49#define DOOR_DATA_SIZE _MUL(2, CLONGSIZE) 50#define DOOR_DESC_PTR _MUL(3, CLONGSIZE) 51#define DOOR_DESC_SIZE _MUL(4, CLONGSIZE) 52#define DOOR_PC _MUL(5, CLONGSIZE) 53#define DOOR_SERVERS _MUL(6, CLONGSIZE) 54#define DOOR_INFO_PTR _MUL(7, CLONGSIZE) 55 56/* 57 * All of the syscalls except door_return() follow the same pattern. The 58 * subcode goes in %r9, after all of the other arguments. 59 */ 60#define DOOR_SYSCALL(name, code) \ 61 ENTRY(name); \ 62 movq $code, %r9; /* subcode */ \ 63 SYSTRAP_RVAL1(door); \ 64 SYSCERROR; \ 65 RET; \ 66 SET_SIZE(name) 67 68 DOOR_SYSCALL(__door_bind, DOOR_BIND) 69 DOOR_SYSCALL(__door_call, DOOR_CALL) 70 DOOR_SYSCALL(__door_create, DOOR_CREATE) 71 DOOR_SYSCALL(__door_getparam, DOOR_GETPARAM) 72 DOOR_SYSCALL(__door_info, DOOR_INFO) 73 DOOR_SYSCALL(__door_revoke, DOOR_REVOKE) 74 DOOR_SYSCALL(__door_setparam, DOOR_SETPARAM) 75 DOOR_SYSCALL(__door_ucred, DOOR_UCRED) 76 DOOR_SYSCALL(__door_unbind, DOOR_UNBIND) 77 DOOR_SYSCALL(__door_unref, DOOR_UNREFSYS) 78 79/* 80 * int 81 * __door_return( 82 * void *data_ptr, 83 * size_t data_size, (in bytes) 84 * door_return_desc_t *door_ptr, (holds returned desc info) 85 * caddr_t stack_base, 86 * size_t stack_size) 87 */ 88 ENTRY(__door_return) 89door_restart: 90 movq $DOOR_RETURN, %r9 /* subcode */ 91 SYSTRAP_RVAL1(door) 92 jb 2f /* errno is set */ 93 /* 94 * On return, we're serving a door_call. Our stack looks like this: 95 * 96 * descriptors (if any) 97 * data (if any) 98 * sp-> struct door_results 99 */ 100 movl DOOR_SERVERS(%rsp), %eax 101 andl %eax, %eax /* test nservers */ 102 jg 1f 103 /* 104 * this is the last server thread - call creation func for more 105 */ 106 movq _daref_(door_server_func), %rax 107 movq 0(%rax), %rax 108 movq DOOR_INFO_PTR(%rsp), %rdi 109 call *%rax /* call create function */ 1101: 111 /* Call the door server function now */ 112 movq DOOR_COOKIE(%rsp), %rdi 113 movq DOOR_DATA_PTR(%rsp), %rsi 114 movq DOOR_DATA_SIZE(%rsp), %rdx 115 movq DOOR_DESC_PTR(%rsp), %rcx 116 movq DOOR_DESC_SIZE(%rsp), %r8 117 movq DOOR_PC(%rsp), %rax 118 call *%rax 119 /* Exit the thread if we return here */ 120 movq $0, %rdi 121 call _thrp_terminate 122 /* NOTREACHED */ 1232: 124 /* 125 * Error during door_return call. Repark the thread in the kernel if 126 * the error code is EINTR (or ERESTART) and this lwp is still part 127 * of the same process. 128 */ 129 cmpl $ERESTART, %eax /* ERESTART is same as EINTR */ 130 jne 3f 131 movl $EINTR, %eax 1323: 133 cmpl $EINTR, %eax /* interrupted while waiting? */ 134 jne __cerror /* if not, return the error */ 135 136 call getpid /* get current process id */ 137 movq _daref_(door_create_pid), %rdx 138 movl 0(%rdx), %edx 139 cmpl %eax, %edx /* same process? */ 140 movl $EINTR, %eax /* if no, return EINTR (child of forkall) */ 141 jne __cerror 142 143 movq $0, %rdi /* clear arguments and restart */ 144 movq $0, %rsi 145 movq $0, %rdx 146 jmp door_restart 147 SET_SIZE(__door_return) 148