minix/lib/libc/arch/mips/gen/swapcontext.S
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

67 lines
2.4 KiB
ArmAsm

/* $NetBSD: swapcontext.S,v 1.5 2012/09/12 02:00:52 manu 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.h"
#include "assym.h"
#if defined(SYSLIBC_SCCS) && !defined(lint)
RCSID("$NetBSD: swapcontext.S,v 1.5 2012/09/12 02:00:52 manu Exp $")
#endif /* SYSLIBC_SCCS && !lint */
.set reorder
NESTED(swapcontext, CALLFRAME_SIZ, ra)
.mask 0x80000030, (CALLFRAME_RA - CALLFRAME_SIZ)
PTR_SUBU sp, sp, CALLFRAME_SIZ
PTR_S ra, CALLFRAME_RA(sp) # save ra
PTR_S a0, 0(sp) # stash away oucp
PTR_S a1, SZREG(sp) # stash away ucp
SYSTRAP(getcontext)
PTR_L ra, CALLFRAME_RA(sp)
bne a3, zero, 1f
PTR_L v1, 0(sp) # load oucp again for adjustment
PTR_L a0, SZREG(sp) # load ucp
PTR_ADDIU v0, sp, CALLFRAME_SIZ
REG_PROLOGUE
REG_S zero, _OFFSETOF_UC_GREGS_V0(v1)
REG_S ra, _OFFSETOF_UC_GREGS_EPC(v1)
REG_S v0, _OFFSETOF_UC_GREGS_SP(v1)
REG_EPILOGUE
PIC_TAILCALL(setcontext)
/* NOTREACHED */
1:
PTR_ADDU sp, sp, CALLFRAME_SIZ
SETUP_GPX(t0);
SETUP_GP64(t3,swapcontext);
PIC_TAILCALL(__cerror)
END(swapcontext)