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 .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 ANSI_PRAGMA_WEAK2(door_unbind,__door_unbind,function) 41 42/* 43 * Offsets within struct door_results 44 */ 45#define DOOR_COOKIE (SA(MINFRAME) + STACK_BIAS + 0*CLONGSIZE) 46#define DOOR_DATA_PTR (SA(MINFRAME) + STACK_BIAS + 1*CLONGSIZE) 47#define DOOR_DATA_SIZE (SA(MINFRAME) + STACK_BIAS + 2*CLONGSIZE) 48#define DOOR_DESC_PTR (SA(MINFRAME) + STACK_BIAS + 3*CLONGSIZE) 49#define DOOR_DESC_SIZE (SA(MINFRAME) + STACK_BIAS + 4*CLONGSIZE) 50#define DOOR_PC (SA(MINFRAME) + STACK_BIAS + 5*CLONGSIZE) 51#define DOOR_SERVERS (SA(MINFRAME) + STACK_BIAS + 6*CLONGSIZE) 52#define DOOR_INFO_PTR (SA(MINFRAME) + STACK_BIAS + 7*CLONGSIZE) 53 54/* 55 * All of the syscalls except door_return() follow the same pattern. The 56 * subcode goes in %o5, after all of the other arguments. 57 */ 58#define DOOR_SYSCALL(name, code) \ 59 ENTRY(name); \ 60 mov code, %o5; /* subcode */ \ 61 SYSTRAP_RVAL1(door); \ 62 SYSCERROR; \ 63 RET; \ 64 SET_SIZE(name) 65 66 DOOR_SYSCALL(__door_bind, DOOR_BIND) 67 DOOR_SYSCALL(__door_call, DOOR_CALL) 68 DOOR_SYSCALL(__door_create, DOOR_CREATE) 69 DOOR_SYSCALL(__door_getparam, DOOR_GETPARAM) 70 DOOR_SYSCALL(__door_info, DOOR_INFO) 71 DOOR_SYSCALL(__door_revoke, DOOR_REVOKE) 72 DOOR_SYSCALL(__door_setparam, DOOR_SETPARAM) 73 DOOR_SYSCALL(__door_ucred, DOOR_UCRED) 74 DOOR_SYSCALL(__door_unbind, DOOR_UNBIND) 75 DOOR_SYSCALL(__door_unref, DOOR_UNREFSYS) 76 77/* 78 * int 79 * __door_return( 80 * void *data_ptr, 81 * size_t data_size, (in bytes) 82 * door_return_desc_t *door_ptr, (holds returned desc info) 83 * caddr_t stack_base, 84 * size_t stack_size) 85 */ 86 ENTRY(__door_return) 87door_restart: 88 mov DOOR_RETURN, %o5 /* subcode */ 89 SYSTRAP_RVAL1(door) 90 bcs,pn %icc, 2f /* errno is set */ 91 ld [%sp + DOOR_SERVERS], %g1 /* (delay) load nservers */ 92 /* 93 * On return, we're serving a door_call. Our stack looks like this: 94 * 95 * descriptors (if any) 96 * data (if any) 97 * struct door_results 98 * MINFRAME 99 * sp -> 100 */ 101 tst %g1 /* test nservers */ 102 bg 1f /* everything looks o.k. */ 103 ldn [%sp + DOOR_COOKIE], %o0 /* (delay) load cookie */ 104 /* 105 * this is the last server thread - call creation func for more 106 */ 107 save %sp, -SA(MINFRAME), %sp 108 PIC_SETUP(g1) 109#ifdef __sparcv9 110 sethi %hi(door_server_func), %g5 111 or %g5, %lo(door_server_func), %g5 112 ldn [%g5 + %g1], %g1 113#else 114 ldn [%g1 + door_server_func], %g1 115#endif 116 ldn [%g1], %g1 117 jmpl %g1, %o7 /* call create function */ 118 ldn [%fp + DOOR_INFO_PTR], %o0 /* (delay) load door_info ptr */ 119 restore 1201: 121 /* Call the door server function now */ 122 ldn [%sp + DOOR_DATA_PTR], %o1 123 ldn [%sp + DOOR_DATA_SIZE], %o2 124 ldn [%sp + DOOR_DESC_PTR], %o3 125 ldn [%sp + DOOR_PC], %g1 126 jmpl %g1, %o7 127 ldn [%sp + DOOR_DESC_SIZE], %o4 128 129 /* Exit the thread if we return here */ 130 call _thrp_terminate 131 mov %g0, %o0 132 /* NOTREACHED */ 1332: 134 /* 135 * Error during door_return call. Repark the thread in the kernel if 136 * the error code is EINTR (or ERESTART) and this lwp is still part 137 * of the same process. 138 */ 139 cmp %o0, ERESTART /* ERESTART is same as EINTR */ 140 be,a 3f 141 mov EINTR, %o0 1423: 143 cmp %o0, EINTR /* interrupted while waiting? */ 144 bne __cerror /* if not, return the error */ 145 nop 146 147 save %sp, -SA(MINFRAME), %sp 148 call getpid 149 nop 150 PIC_SETUP(g1) 151#ifdef __sparcv9 152 sethi %hi(door_create_pid), %g5 153 or %g5, %lo(door_create_pid), %g5 154 ldn [%g1 + %g5], %g1 155#else 156 ldn [%g1 + door_create_pid], %g1 157#endif 158 ld [%g1], %g1 159 cmp %o0, %g1 /* same process? */ 160 mov EINTR, %o0 /* if no, return EINTR (child of forkall) */ 161 bne __cerror 162 restore 163 164 clr %o0 /* clear arguments and restart */ 165 clr %o1 166 ba door_restart 167 clr %o2 168 SET_SIZE(__door_return) 169