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 2009 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 .file "door.s" 28 29#include "SYS.h" 30#include <sys/door.h> 31 32 /* 33 * weak aliases for public interfaces 34 */ 35 ANSI_PRAGMA_WEAK2(door_bind,__door_bind,function) 36 ANSI_PRAGMA_WEAK2(door_getparam,__door_getparam,function) 37 ANSI_PRAGMA_WEAK2(door_info,__door_info,function) 38 ANSI_PRAGMA_WEAK2(door_revoke,__door_revoke,function) 39 ANSI_PRAGMA_WEAK2(door_setparam,__door_setparam,function) 40 41/* 42 * Offsets within struct door_results 43 */ 44#define DOOR_COOKIE (SA(MINFRAME) + STACK_BIAS + 0*CLONGSIZE) 45#define DOOR_DATA_PTR (SA(MINFRAME) + STACK_BIAS + 1*CLONGSIZE) 46#define DOOR_DATA_SIZE (SA(MINFRAME) + STACK_BIAS + 2*CLONGSIZE) 47#define DOOR_DESC_PTR (SA(MINFRAME) + STACK_BIAS + 3*CLONGSIZE) 48#define DOOR_DESC_SIZE (SA(MINFRAME) + STACK_BIAS + 4*CLONGSIZE) 49#define DOOR_PC (SA(MINFRAME) + STACK_BIAS + 5*CLONGSIZE) 50#define DOOR_SERVERS (SA(MINFRAME) + STACK_BIAS + 6*CLONGSIZE) 51#define DOOR_INFO_PTR (SA(MINFRAME) + STACK_BIAS + 7*CLONGSIZE) 52 53/* 54 * All of the syscalls except door_return() follow the same pattern. The 55 * subcode goes in %o5, after all of the other arguments. 56 */ 57#define DOOR_SYSCALL(name, code) \ 58 ENTRY(name); \ 59 mov code, %o5; /* subcode */ \ 60 SYSTRAP_RVAL1(door); \ 61 SYSCERROR; \ 62 RET; \ 63 SET_SIZE(name) 64 65 DOOR_SYSCALL(__door_bind, DOOR_BIND) 66 DOOR_SYSCALL(__door_call, DOOR_CALL) 67 DOOR_SYSCALL(__door_create, DOOR_CREATE) 68 DOOR_SYSCALL(__door_getparam, DOOR_GETPARAM) 69 DOOR_SYSCALL(__door_info, DOOR_INFO) 70 DOOR_SYSCALL(__door_revoke, DOOR_REVOKE) 71 DOOR_SYSCALL(__door_setparam, DOOR_SETPARAM) 72 DOOR_SYSCALL(__door_ucred, DOOR_UCRED) 73 DOOR_SYSCALL(__door_unbind, DOOR_UNBIND) 74 DOOR_SYSCALL(__door_unref, DOOR_UNREFSYS) 75 76/* 77 * int 78 * __door_return( 79 * void *data_ptr, 80 * size_t data_size, (in bytes) 81 * door_return_desc_t *door_ptr, (holds returned desc info) 82 * caddr_t stack_base, 83 * size_t stack_size) 84 */ 85 ENTRY(__door_return) 86door_restart: 87 mov DOOR_RETURN, %o5 /* subcode */ 88 SYSTRAP_RVAL1(door) 89 bcs,pn %icc, 2f /* errno is set */ 90 ld [%sp + DOOR_SERVERS], %g1 /* (delay) load nservers */ 91 /* 92 * On return, we're serving a door_call. Our stack looks like this: 93 * 94 * descriptors (if any) 95 * data (if any) 96 * struct door_results 97 * MINFRAME 98 * sp -> 99 */ 100 tst %g1 /* test nservers */ 101 bg 1f /* everything looks o.k. */ 102 ldn [%sp + DOOR_COOKIE], %o0 /* (delay) load cookie */ 103 /* 104 * this is the last server thread - call creation func for more 105 */ 106 save %sp, -SA(MINFRAME), %sp 107 call door_depletion_cb 108 ldn [%fp + DOOR_INFO_PTR], %o0 /* (delay) load door_info ptr */ 109 restore 1101: 111 /* Call the door server function now */ 112 ldn [%sp + DOOR_DATA_PTR], %o1 113 ldn [%sp + DOOR_DATA_SIZE], %o2 114 ldn [%sp + DOOR_DESC_PTR], %o3 115 ldn [%sp + DOOR_PC], %g1 116 jmpl %g1, %o7 117 ldn [%sp + DOOR_DESC_SIZE], %o4 118 119 /* Exit the thread if we return here */ 120 call _thrp_terminate 121 mov %g0, %o0 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 cmp %o0, ERESTART /* ERESTART is same as EINTR */ 130 be,a 3f 131 mov EINTR, %o0 1323: 133 cmp %o0, EINTR /* interrupted while waiting? */ 134 bne __cerror /* if not, return the error */ 135 nop 136 137 save %sp, -SA(MINFRAME), %sp 138 call getpid 139 nop 140 PIC_SETUP(g1) 141#ifdef __sparcv9 142 sethi %hi(door_create_pid), %g5 143 or %g5, %lo(door_create_pid), %g5 144 ldn [%g1 + %g5], %g1 145#else 146 ldn [%g1 + door_create_pid], %g1 147#endif 148 ld [%g1], %g1 149 cmp %o0, %g1 /* same process? */ 150 mov EINTR, %o0 /* if no, return EINTR (child of forkall) */ 151 bne __cerror 152 restore 153 154 clr %o0 /* clear arguments and restart */ 155 clr %o1 156 ba door_restart 157 clr %o2 158 SET_SIZE(__door_return) 159