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freebsd
GitHub Repository: freebsd/freebsd-src
 Path: blob/main/lib/libc/powerpc/gen/_setjmp.S
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/*-

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 * Copyright (c) 2002 Peter Grehan.

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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 AUTHOR AND CONTRIBUTORS ``AS IS'' AND

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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE

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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

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 * SUCH DAMAGE.

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 */

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/*      $NetBSD: _setjmp.S,v 1.1 1997/03/29 20:55:53 thorpej Exp $      */

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#include <machine/asm.h>

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/*

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 * C library -- _setjmp, _longjmp

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 *

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 *      _longjmp(a,v)

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 * will generate a "return(v?v:1)" from the last call to

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 *      _setjmp(a)

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 * by restoring registers from the stack.

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 * The previous signal state is NOT restored.

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 *

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 * jmpbuf layout:

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 *     +------------+

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 *     |   unused   |

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 *     +------------+

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 *     |   unused   |

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 *     |            |

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 *     | (4 words)  |

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 *     |            |

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 *     +------------+

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 *     | saved regs |

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 *     |    ...     |	

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 */

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ENTRY(_setjmp)

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	mflr	%r11

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	mfcr	%r12

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	mr	%r10,%r1

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	mr	%r9,%r2

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	stmw	%r9,20(%r3)

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	/* FPRs */

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	stfd	%f14,112+0*8(%r3)

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	stfd	%f15,112+1*8(%r3)

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	stfd	%f16,112+2*8(%r3)

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	stfd	%f17,112+3*8(%r3)

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	stfd	%f18,112+4*8(%r3)

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	stfd	%f19,112+5*8(%r3)

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	stfd	%f20,112+6*8(%r3)

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	stfd	%f21,112+7*8(%r3)

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	stfd	%f22,112+8*8(%r3)

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	stfd	%f23,112+9*8(%r3)

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	stfd	%f24,112+10*8(%r3)

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	stfd	%f25,112+11*8(%r3)

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	stfd	%f26,112+12*8(%r3)

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	stfd	%f27,112+13*8(%r3)

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	stfd	%f28,112+14*8(%r3)

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	stfd	%f29,112+15*8(%r3)

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	stfd	%f30,112+16*8(%r3)

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	stfd	%f31,112+17*8(%r3)

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	li	%r3,0

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	blr

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END(_setjmp)

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ENTRY(_longjmp)

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	lmw	%r9,20(%r3)

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	/* FPRs */

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	lfd	%f14,112+0*8(%r3)

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	lfd	%f15,112+1*8(%r3)

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	lfd	%f16,112+2*8(%r3)

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	lfd	%f17,112+3*8(%r3)

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	lfd	%f18,112+4*8(%r3)

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	lfd	%f19,112+5*8(%r3)

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	lfd	%f20,112+6*8(%r3)

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	lfd	%f21,112+7*8(%r3)

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	lfd	%f22,112+8*8(%r3)

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	lfd	%f23,112+9*8(%r3)

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	lfd	%f24,112+10*8(%r3)

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	lfd	%f25,112+11*8(%r3)

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	lfd	%f26,112+12*8(%r3)

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	lfd	%f27,112+13*8(%r3)

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	lfd	%f28,112+14*8(%r3)

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	lfd	%f29,112+15*8(%r3)

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	lfd	%f30,112+16*8(%r3)

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	lfd	%f31,112+17*8(%r3)

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	mtlr	%r11

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	mtcr	%r12

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	mr	%r1,%r10

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	or.	%r3,%r4,%r4

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	bnelr

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	li	%r3,1

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	blr

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END(_longjmp)

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	.section .note.GNU-stack,"",%progbits

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