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 (SA(MINFRAME) + STACK_BIAS + 0*CLONGSIZE) 59#define DOOR_DATA_PTR (SA(MINFRAME) + STACK_BIAS + 1*CLONGSIZE) 60#define DOOR_DATA_SIZE (SA(MINFRAME) + STACK_BIAS + 2*CLONGSIZE) 61#define DOOR_DESC_PTR (SA(MINFRAME) + STACK_BIAS + 3*CLONGSIZE) 62#define DOOR_DESC_SIZE (SA(MINFRAME) + STACK_BIAS + 4*CLONGSIZE) 63#define DOOR_PC (SA(MINFRAME) + STACK_BIAS + 5*CLONGSIZE) 64#define DOOR_SERVERS (SA(MINFRAME) + STACK_BIAS + 6*CLONGSIZE) 65#define DOOR_INFO_PTR (SA(MINFRAME) + STACK_BIAS + 7*CLONGSIZE) 66 67/* 68 * All of the syscalls except door_return() follow the same pattern. The 69 * subcode goes in %o5, after all of the other arguments. 70 */ 71#define DOOR_SYSCALL(name, code) \ 72 ENTRY(name); \ 73 mov code, %o5; /* 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 mov DOOR_RETURN, %o5 /* subcode */ 102 SYSTRAP_RVAL1(door) 103 bcs,pn %icc, 2f /* errno is set */ 104 ld [%sp + DOOR_SERVERS], %g1 /* (delay) load nservers */ 105 /* 106 * On return, we're serving a door_call. Our stack looks like this: 107 * 108 * descriptors (if any) 109 * data (if any) 110 * struct door_results 111 * MINFRAME 112 * sp -> 113 */ 114 tst %g1 /* test nservers */ 115 bg 1f /* everything looks o.k. */ 116 ldn [%sp + DOOR_COOKIE], %o0 /* (delay) load cookie */ 117 /* 118 * this is the last server thread - call creation func for more 119 */ 120 save %sp, -SA(MINFRAME), %sp 121 PIC_SETUP(g1) 122#ifdef __sparcv9 123 sethi %hi(door_server_func), %g5 124 or %g5, %lo(door_server_func), %g5 125 ldn [%g5 + %g1], %g1 126#else 127 ldn [%g1 + door_server_func], %g1 128#endif 129 ldn [%g1], %g1 130 jmpl %g1, %o7 /* call create function */ 131 ldn [%fp + DOOR_INFO_PTR], %o0 /* (delay) load door_info ptr */ 132 restore 1331: 134 /* Call the door server function now */ 135 ldn [%sp + DOOR_DATA_PTR], %o1 136 ldn [%sp + DOOR_DATA_SIZE], %o2 137 ldn [%sp + DOOR_DESC_PTR], %o3 138 ldn [%sp + DOOR_PC], %g1 139 jmpl %g1, %o7 140 ldn [%sp + DOOR_DESC_SIZE], %o4 141 142 /* Exit the thread if we return here */ 143 call _thr_terminate 144 mov %g0, %o0 145 /* NOTREACHED */ 1462: 147 /* 148 * Error during door_return call. Repark the thread in the kernel if 149 * the error code is EINTR (or ERESTART) and this lwp is still part 150 * of the same process. 151 */ 152 cmp %o0, ERESTART /* ERESTART is same as EINTR */ 153 be,a 3f 154 mov EINTR, %o0 1553: 156 cmp %o0, EINTR /* interrupted while waiting? */ 157 bne __cerror /* if not, return the error */ 158 nop 159 160 save %sp, -SA(MINFRAME), %sp 161 call _private_getpid /* get current process id */ 162 nop 163 PIC_SETUP(g1) 164#ifdef __sparcv9 165 sethi %hi(door_create_pid), %g5 166 or %g5, %lo(door_create_pid), %g5 167 ldn [%g1 + %g5], %g1 168#else 169 ldn [%g1 + door_create_pid], %g1 170#endif 171 ld [%g1], %g1 172 cmp %o0, %g1 /* same process? */ 173 mov EINTR, %o0 /* if no, return EINTR (child of forkall) */ 174 bne __cerror 175 restore 176 177 clr %o0 /* clear arguments and restart */ 178 clr %o1 179 ba door_restart 180 clr %o2 181 SET_SIZE(__door_return) 182