minix/lib/libc/arch/sparc64/gen/makecontext.c
Lionel Sambuc e415d48872 Libc update to simplify merge.
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.
2012-11-15 16:07:29 +01:00

83 lines
2.7 KiB
C

/* $NetBSD: makecontext.c,v 1.5 2012/03/17 21:35:06 martin Exp $ */
/*-
* Copyright (c) 2001 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Klaus Klein.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: makecontext.c,v 1.5 2012/03/17 21:35:06 martin Exp $");
#endif
#include <inttypes.h>
#include <stddef.h>
#include <sys/types.h>
#include <ucontext.h>
#include "extern.h"
#include <stdarg.h>
void
makecontext(ucontext_t *ucp, void (*func)(void), int argc, ...)
{
__greg_t *gr = ucp->uc_mcontext.__gregs;
int i;
ulong *sp;
va_list ap;
/*LINTED*/
sp = (ulong *)((caddr_t)ucp->uc_stack.ss_sp + ucp->uc_stack.ss_size);
/* Align on quad-word boundary. */
sp = (ulong *)((ulong)sp & ~0xf);
/* Make room for: argx, argd, struct return pointer(?), rwindow. */
sp -= (argc > 6 ? argc - 6 : 0) + 6 + 8 + 8;
va_start(ap, argc);
/* Pass up to 6 arguments in %o0-5. */
for (i = 0; i < argc && i < 6; i++)
gr[_REG_O0 + i] = sp[i + 16] = va_arg(ap, unsigned long);
/* Pass any additional arguments on the stack. */
for (; i < argc; i++)
sp[i + 16] = va_arg(ap, unsigned long);
va_end(ap);
sp[14] = (ulong)sp - 2047;
sp[15] = (ulong)_resumecontext - 8;
/*LINTED*/
sp = (ulong *)((caddr_t)sp - 2047);
gr[_REG_O6] = (__greg_t)sp;
gr[_REG_PC] = (__greg_t)func;
gr[_REG_nPC] = (__greg_t)func + 4;
gr[_REG_O7] = (__greg_t)_resumecontext - 8;
}