0a6a1f1d05
This brings our tree to NetBSD 7.0, as found on -current on the 10-10-2015. This updates: - LLVM to 3.6.1 - GCC to GCC 5.1 - Replace minix/commands/zdump with usr.bin/zdump - external/bsd/libelf has moved to /external/bsd/elftoolchain/ - Import ctwm - Drop sprintf from libminc Change-Id: I149836ac18e9326be9353958bab9b266efb056f0
65 lines
2.6 KiB
ArmAsm
65 lines
2.6 KiB
ArmAsm
/* $NetBSD: swapcontext.S,v 1.1 2014/08/10 05:47:36 matt Exp $ */
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/*-
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* Copyright (c) 2014 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Matt Thomas of 3am Software Foundry.
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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 <machine/asm.h>
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#include "assym.h"
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#if defined(LIBC_SCCS) && !defined(lint)
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RCSID("$NetBSD: swapcontext.S,v 1.1 2014/08/10 05:47:36 matt Exp $")
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#endif /* LIBC_SCCS && !lint */
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/* LINTSTUB: int swapcontext(ucontext_t * restrict, ucontext_t * restrict); */
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ENTRY(swapcontext)
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sub sp, sp, #32 /* allocate stack frame */
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stp x29, x30, [sp, #16] /* save FP & RA */
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add x29, sp, #16 /* new FP */
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stp x0, x1, [sp, #0] /* save oucp & ucp */
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bl _C_LABEL(_getcontext) /* getcontext(oucp) */
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mov x3, x0 /* save return value */
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ldp x2, x0, [sp, #0] /* restore oucp & ucp */
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ldp x29, x30, [sp, #16] /* restore FP & RA */
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add sp, sp, #32 /* free stack frame */
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/*
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* Assume _getcontext succeeded.
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*/
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mov x4, sp /* Get SP */
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str x4, [x2, #_UC_REGS_SP] /* Adjust saved SP. */
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str x30, [x2, #_UC_REGS_PC] /* Adjust saved LR. */
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cbz x3, _C_LABEL(setcontext)/* setcontext if getcontext succeeded */
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mov x0, x3 /* restore getcontext return value */
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ret /* return on error from getcontext */
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END(swapcontext)
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