e415d48872
Bumping libc files for unsupported architectures, to simplify merging. A bunch of small fixes: * in libutil update * the macro in endian.h * some undefined types due to clear separation from host. * Fix a warning for cdbr.c Some modification which were required for the new build system: * inclusion path for const.h in sconst, still hacky * Removed default malloc.c which conflicts on some occasions.
73 lines
2.8 KiB
C
73 lines
2.8 KiB
C
/* $NetBSD: _lwp.c,v 1.7 2012/03/22 05:36:50 matt Exp $ */
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/*
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* Copyright (c) 2001 Wasabi Systems, Inc.
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* All rights reserved.
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*
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* Written by Allen Briggs for Wasabi Systems, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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__RCSID("$NetBSD: _lwp.c,v 1.7 2012/03/22 05:36:50 matt Exp $");
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#endif /* LIBC_SCCS and not lint */
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#include "namespace.h"
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#include <sys/param.h>
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#include <sys/types.h>
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#include <ucontext.h>
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#include <lwp.h>
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#include <stdlib.h>
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void
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_lwp_makecontext(ucontext_t *u, void (*start)(void *), void *arg,
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void *tcb, caddr_t stack_base, size_t stack_size)
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{
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uintptr_t sp;
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getcontext(u);
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u->uc_link = NULL;
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u->uc_stack.ss_sp = stack_base;
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u->uc_stack.ss_size = stack_size;
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sp = (uintptr_t)stack_base + stack_size;
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sp -= STACK_ALIGNBYTES + 1;
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sp &= ~STACK_ALIGNBYTES;
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u->uc_mcontext.__gregs[3] = (uintptr_t) arg; /* arg1 */
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u->uc_mcontext.__gregs[1] = sp; /* stack */
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u->uc_mcontext.__gregs[33] = (uintptr_t) _lwp_exit; /* LR */
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u->uc_mcontext.__gregs[34] = (uintptr_t) start; /* PC */
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u->uc_mcontext.__gregs[_REG_R2] =
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(uintptr_t)tcb + TLS_TP_OFFSET + sizeof(struct tls_tcb);
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}
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