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 (SA(MINFRAME) + STACK_BIAS + 0*CLONGSIZE) 48#define DOOR_DATA_PTR (SA(MINFRAME) + STACK_BIAS + 1*CLONGSIZE) 49#define DOOR_DATA_SIZE (SA(MINFRAME) + STACK_BIAS + 2*CLONGSIZE) 50#define DOOR_DESC_PTR (SA(MINFRAME) + STACK_BIAS + 3*CLONGSIZE) 51#define DOOR_DESC_SIZE (SA(MINFRAME) + STACK_BIAS + 4*CLONGSIZE) 52#define DOOR_PC (SA(MINFRAME) + STACK_BIAS + 5*CLONGSIZE) 53#define DOOR_SERVERS (SA(MINFRAME) + STACK_BIAS + 6*CLONGSIZE) 54#define DOOR_INFO_PTR (SA(MINFRAME) + STACK_BIAS + 7*CLONGSIZE) 55 56/* 57 * All of the syscalls except door_return() follow the same pattern. The 58 * subcode goes in %o5, after all of the other arguments. 59 */ 60#define DOOR_SYSCALL(name, code) \ 61 ENTRY(name); \ 62 mov code, %o5; /* 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 mov DOOR_RETURN, %o5 /* subcode */ 91 SYSTRAP_RVAL1(door) 92 bcs,pn %icc, 2f /* errno is set */ 93 ld [%sp + DOOR_SERVERS], %g1 /* (delay) load nservers */ 94 /* 95 * On return, we're serving a door_call. Our stack looks like this: 96 * 97 * descriptors (if any) 98 * data (if any) 99 * struct door_results 100 * MINFRAME 101 * sp -> 102 */ 103 tst %g1 /* test nservers */ 104 bg 1f /* everything looks o.k. */ 105 ldn [%sp + DOOR_COOKIE], %o0 /* (delay) load cookie */ 106 /* 107 * this is the last server thread - call creation func for more 108 */ 109 save %sp, -SA(MINFRAME), %sp 110 PIC_SETUP(g1) 111#ifdef __sparcv9 112 sethi %hi(door_server_func), %g5 113 or %g5, %lo(door_server_func), %g5 114 ldn [%g5 + %g1], %g1 115#else 116 ldn [%g1 + door_server_func], %g1 117#endif 118 ldn [%g1], %g1 119 jmpl %g1, %o7 /* call create function */ 120 ldn [%fp + DOOR_INFO_PTR], %o0 /* (delay) load door_info ptr */ 121 restore 1221: 123 /* Call the door server function now */ 124 ldn [%sp + DOOR_DATA_PTR], %o1 125 ldn [%sp + DOOR_DATA_SIZE], %o2 126 ldn [%sp + DOOR_DESC_PTR], %o3 127 ldn [%sp + DOOR_PC], %g1 128 jmpl %g1, %o7 129 ldn [%sp + DOOR_DESC_SIZE], %o4 130 131 /* Exit the thread if we return here */ 132 call _thrp_terminate 133 mov %g0, %o0 134 /* NOTREACHED */ 1352: 136 /* 137 * Error during door_return call. Repark the thread in the kernel if 138 * the error code is EINTR (or ERESTART) and this lwp is still part 139 * of the same process. 140 */ 141 cmp %o0, ERESTART /* ERESTART is same as EINTR */ 142 be,a 3f 143 mov EINTR, %o0 1443: 145 cmp %o0, EINTR /* interrupted while waiting? */ 146 bne __cerror /* if not, return the error */ 147 nop 148 149 save %sp, -SA(MINFRAME), %sp 150 call getpid 151 nop 152 PIC_SETUP(g1) 153#ifdef __sparcv9 154 sethi %hi(door_create_pid), %g5 155 or %g5, %lo(door_create_pid), %g5 156 ldn [%g1 + %g5], %g1 157#else 158 ldn [%g1 + door_create_pid], %g1 159#endif 160 ld [%g1], %g1 161 cmp %o0, %g1 /* same process? */ 162 mov EINTR, %o0 /* if no, return EINTR (child of forkall) */ 163 bne __cerror 164 restore 165 166 clr %o0 /* clear arguments and restart */ 167 clr %o1 168 ba door_restart 169 clr %o2 170 SET_SIZE(__door_return) 171