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 2006 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 #include <sys/proc.h> 30 31 /* 32 * Install process context ops for the current process. 33 */ 34 void 35 installpctx( 36 proc_t *p, 37 void *arg, 38 void (*save)(void *), 39 void (*restore)(void *), 40 void (*fork)(void *, void *), 41 void (*exit)(void *), 42 void (*free)(void *, int)) 43 { 44 struct pctxop *pctx; 45 46 pctx = kmem_alloc(sizeof (struct pctxop), KM_SLEEP); 47 pctx->save_op = save; 48 pctx->restore_op = restore; 49 pctx->fork_op = fork; 50 pctx->exit_op = exit; 51 pctx->free_op = free; 52 pctx->arg = arg; 53 pctx->next = p->p_pctx; 54 p->p_pctx = pctx; 55 } 56 57 /* 58 * Remove a process context ops from the current process. 59 */ 60 int 61 removepctx( 62 proc_t *p, 63 void *arg, 64 void (*save)(void *), 65 void (*restore)(void *), 66 void (*fork)(void *, void *), 67 void (*exit)(void *), 68 void (*free)(void *, int)) 69 { 70 struct pctxop *pctx, *prev_pctx; 71 72 prev_pctx = NULL; 73 for (pctx = p->p_pctx; pctx != NULL; pctx = pctx->next) { 74 if (pctx->save_op == save && pctx->restore_op == restore && 75 pctx->fork_op == fork && 76 pctx->exit_op == exit && pctx->free_op == free && 77 pctx->arg == arg) { 78 if (prev_pctx) 79 prev_pctx->next = pctx->next; 80 else 81 p->p_pctx = pctx->next; 82 if (pctx->free_op != NULL) 83 (pctx->free_op)(pctx->arg, 0); 84 kmem_free(pctx, sizeof (struct pctxop)); 85 return (1); 86 } 87 prev_pctx = pctx; 88 } 89 return (0); 90 } 91 92 void 93 savepctx(proc_t *p) 94 { 95 struct pctxop *pctx; 96 97 ASSERT(p == curthread->t_procp); 98 for (pctx = p->p_pctx; pctx != 0; pctx = pctx->next) 99 if (pctx->save_op != NULL) 100 (pctx->save_op)(pctx->arg); 101 } 102 103 void 104 restorepctx(proc_t *p) 105 { 106 struct pctxop *pctx; 107 108 ASSERT(p == curthread->t_procp); 109 for (pctx = p->p_pctx; pctx != 0; pctx = pctx->next) 110 if (pctx->restore_op != NULL) 111 (pctx->restore_op)(pctx->arg); 112 } 113 114 void 115 forkpctx(proc_t *p, proc_t *cp) 116 { 117 struct pctxop *pctx; 118 119 for (pctx = p->p_pctx; pctx != NULL; pctx = pctx->next) 120 if (pctx->fork_op != NULL) 121 (pctx->fork_op)(p, cp); 122 } 123 124 /* 125 * exitpctx is called during thread/lwp exit to perform any actions 126 * needed when an LWP in the process leaves the processor for the last 127 * time. This routine is not intended to deal with freeing memory; freepctx() 128 * is used for that purpose during proc_exit(). This routine is provided to 129 * allow for clean-up that can't wait until thread_free(). 130 */ 131 void 132 exitpctx(proc_t *p) 133 { 134 struct pctxop *pctx; 135 136 for (pctx = p->p_pctx; pctx != NULL; pctx = pctx->next) 137 if (pctx->exit_op != NULL) 138 (pctx->exit_op)(p); 139 } 140 141 /* 142 * freepctx is called from proc_exit() to get rid of the actual context ops. 143 */ 144 void 145 freepctx(proc_t *p, int isexec) 146 { 147 struct pctxop *pctx; 148 149 while ((pctx = p->p_pctx) != NULL) { 150 p->p_pctx = pctx->next; 151 if (pctx->free_op != NULL) 152 (pctx->free_op)(pctx->arg, isexec); 153 kmem_free(pctx, sizeof (struct pctxop)); 154 } 155 } 156