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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/proc.h>
/*
* Install process context ops for the current process.
*/
void
installpctx(
proc_t *p,
void *arg,
void (*save)(void *),
void (*restore)(void *),
void (*fork)(void *, void *),
void (*exit)(void *),
void (*free)(void *, int))
{
struct pctxop *pctx;
pctx = kmem_alloc(sizeof (struct pctxop), KM_SLEEP);
pctx->save_op = save;
pctx->restore_op = restore;
pctx->fork_op = fork;
pctx->exit_op = exit;
pctx->free_op = free;
pctx->arg = arg;
pctx->next = p->p_pctx;
p->p_pctx = pctx;
}
/*
* Remove a process context ops from the current process.
*/
int
removepctx(
proc_t *p,
void *arg,
void (*save)(void *),
void (*restore)(void *),
void (*fork)(void *, void *),
void (*exit)(void *),
void (*free)(void *, int))
{
struct pctxop *pctx, *prev_pctx;
prev_pctx = NULL;
for (pctx = p->p_pctx; pctx != NULL; pctx = pctx->next) {
if (pctx->save_op == save && pctx->restore_op == restore &&
pctx->fork_op == fork &&
pctx->exit_op == exit && pctx->free_op == free &&
pctx->arg == arg) {
if (prev_pctx)
prev_pctx->next = pctx->next;
else
p->p_pctx = pctx->next;
if (pctx->free_op != NULL)
(pctx->free_op)(pctx->arg, 0);
kmem_free(pctx, sizeof (struct pctxop));
return (1);
}
prev_pctx = pctx;
}
return (0);
}
void
savepctx(proc_t *p)
{
struct pctxop *pctx;
ASSERT(p == curthread->t_procp);
for (pctx = p->p_pctx; pctx != 0; pctx = pctx->next)
if (pctx->save_op != NULL)
(pctx->save_op)(pctx->arg);
}
void
restorepctx(proc_t *p)
{
struct pctxop *pctx;
ASSERT(p == curthread->t_procp);
for (pctx = p->p_pctx; pctx != 0; pctx = pctx->next)
if (pctx->restore_op != NULL)
(pctx->restore_op)(pctx->arg);
}
void
forkpctx(proc_t *p, proc_t *cp)
{
struct pctxop *pctx;
for (pctx = p->p_pctx; pctx != NULL; pctx = pctx->next)
if (pctx->fork_op != NULL)
(pctx->fork_op)(p, cp);
}
/*
* exitpctx is called during thread/lwp exit to perform any actions
* needed when an LWP in the process leaves the processor for the last
* time. This routine is not intended to deal with freeing memory; freepctx()
* is used for that purpose during proc_exit(). This routine is provided to
* allow for clean-up that can't wait until thread_free().
*/
void
exitpctx(proc_t *p)
{
struct pctxop *pctx;
for (pctx = p->p_pctx; pctx != NULL; pctx = pctx->next)
if (pctx->exit_op != NULL)
(pctx->exit_op)(p);
}
/*
* freepctx is called from proc_exit() to get rid of the actual context ops.
*/
void
freepctx(proc_t *p, int isexec)
{
struct pctxop *pctx;
while ((pctx = p->p_pctx) != NULL) {
p->p_pctx = pctx->next;
if (pctx->free_op != NULL)
(pctx->free_op)(pctx->arg, isexec);
kmem_free(pctx, sizeof (struct pctxop));
}
}
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