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 (SA(MINFRAME) + STACK_BIAS + 0*CLONGSIZE) 57#define DOOR_DATA_PTR (SA(MINFRAME) + STACK_BIAS + 1*CLONGSIZE) 58#define DOOR_DATA_SIZE (SA(MINFRAME) + STACK_BIAS + 2*CLONGSIZE) 59#define DOOR_DESC_PTR (SA(MINFRAME) + STACK_BIAS + 3*CLONGSIZE) 60#define DOOR_DESC_SIZE (SA(MINFRAME) + STACK_BIAS + 4*CLONGSIZE) 61#define DOOR_PC (SA(MINFRAME) + STACK_BIAS + 5*CLONGSIZE) 62#define DOOR_SERVERS (SA(MINFRAME) + STACK_BIAS + 6*CLONGSIZE) 63#define DOOR_INFO_PTR (SA(MINFRAME) + STACK_BIAS + 7*CLONGSIZE) 64 65/* 66 * All of the syscalls except door_return() follow the same pattern. The 67 * subcode goes in %o5, after all of the other arguments. 68 */ 69#define DOOR_SYSCALL(name, code) \ 70 ENTRY(name); \ 71 mov code, %o5; /* 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 mov DOOR_RETURN, %o5 /* subcode */ 100 SYSTRAP_RVAL1(door) 101 bcs,pn %icc, 2f /* errno is set */ 102 ld [%sp + DOOR_SERVERS], %g1 /* (delay) load nservers */ 103 /* 104 * On return, we're serving a door_call. Our stack looks like this: 105 * 106 * descriptors (if any) 107 * data (if any) 108 * struct door_results 109 * MINFRAME 110 * sp -> 111 */ 112 tst %g1 /* test nservers */ 113 bg 1f /* everything looks o.k. */ 114 ldn [%sp + DOOR_COOKIE], %o0 /* (delay) load cookie */ 115 /* 116 * this is the last server thread - call creation func for more 117 */ 118 save %sp, -SA(MINFRAME), %sp 119 PIC_SETUP(g1) 120#ifdef __sparcv9 121 sethi %hi(door_server_func), %g5 122 or %g5, %lo(door_server_func), %g5 123 ldn [%g5 + %g1], %g1 124#else 125 ldn [%g1 + door_server_func], %g1 126#endif 127 ldn [%g1], %g1 128 jmpl %g1, %o7 /* call create function */ 129 ldn [%fp + DOOR_INFO_PTR], %o0 /* (delay) load door_info ptr */ 130 restore 1311: 132 /* Call the door server function now */ 133 ldn [%sp + DOOR_DATA_PTR], %o1 134 ldn [%sp + DOOR_DATA_SIZE], %o2 135 ldn [%sp + DOOR_DESC_PTR], %o3 136 ldn [%sp + DOOR_PC], %g1 137 jmpl %g1, %o7 138 ldn [%sp + DOOR_DESC_SIZE], %o4 139 140 /* Exit the thread if we return here */ 141 call _thr_terminate 142 mov %g0, %o0 143 /* NOTREACHED */ 1442: 145 /* 146 * Error during door_return call. Repark the thread in the kernel if 147 * the error code is EINTR (or ERESTART) and this lwp is still part 148 * of the same process. 149 */ 150 cmp %o0, ERESTART /* ERESTART is same as EINTR */ 151 be,a 3f 152 mov EINTR, %o0 1533: 154 cmp %o0, EINTR /* interrupted while waiting? */ 155 bne __cerror /* if not, return the error */ 156 nop 157 158 save %sp, -SA(MINFRAME), %sp 159 call _private_getpid /* get current process id */ 160 nop 161 PIC_SETUP(g1) 162#ifdef __sparcv9 163 sethi %hi(door_create_pid), %g5 164 or %g5, %lo(door_create_pid), %g5 165 ldn [%g1 + %g5], %g1 166#else 167 ldn [%g1 + door_create_pid], %g1 168#endif 169 ld [%g1], %g1 170 cmp %o0, %g1 /* same process? */ 171 mov EINTR, %o0 /* if no, return EINTR (child of forkall) */ 172 bne __cerror 173 restore 174 175 clr %o0 /* clear arguments and restart */ 176 clr %o1 177 ba door_restart 178 clr %o2 179 SET_SIZE(__door_return) 180