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.
75 lines
2.6 KiB
C
75 lines
2.6 KiB
C
/* $NetBSD: _lwp.c,v 1.7 2012/03/21 00:34:04 christos Exp $ */
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/*-
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* Copyright (c) 2002 The NetBSD Foundation, Inc.
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* All rights reserved.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND 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 THE FOUNDATION OR CONTRIBUTORS
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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 2012/03/21 00:34:04 christos Exp $");
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#endif /* LIBC_SCCS and not lint */
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#include "namespace.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 *private, caddr_t stack_base, size_t stack_size)
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{
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__greg_t *gr;
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unsigned long *sp;
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getcontext(u);
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gr = u->uc_mcontext.__gregs;
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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 = (void *)(stack_base + stack_size);
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sp = (ulong *)((ulong)sp & ~0x07);
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/* Make room for the fake caller stack frame (CCFSZ, only in words) */
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sp -= 8 + 8 + 1 + 6 + 1;
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/* Entering (*start)(arg), return is to _lwp_exit */
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gr[_REG_PC] = (ulong) start;
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gr[_REG_nPC] = (ulong) start + 4;
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gr[_REG_O0] = (ulong)arg;
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gr[_REG_O6] = (ulong)sp;
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gr[_REG_O7] = (ulong)_lwp_exit - 8;
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gr[_REG_G7] = (ulong)private;
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/* XXX: uwe: why do we need this? */
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/* create loopback in the window save area on the stack? */
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sp[8+6] = (ulong)sp; /* %i6 */
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sp[8+7] = (ulong)_lwp_exit - 8; /* %i7 */
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}
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