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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 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* Context-saving routine used for pipelines. Designed for use only
* with kmdb_setcontext.
*/
#include <strings.h>
#include <ucontext.h>
#include <sys/types.h>
#include <sys/stack.h>
#include <kmdb/kmdb_context_impl.h>
#include <mdb/mdb_kreg.h>
void
kmdb_makecontext(ucontext_t *ucp, void (*func)(void *), void *arg, caddr_t stk,
size_t stksize)
{
uintptr_t *stack = (uintptr_t *)(((uintptr_t)stk + stksize - 1) &
~(STACK_ALIGN - 1));
*stack-- = 0;
ucp->uc_mcontext.gregs[REG_PC] = (greg_t)func;
ucp->uc_mcontext.gregs[REG_SP] = (greg_t)stack;
ucp->uc_mcontext.gregs[REG_RDI] = (greg_t)arg;
}
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