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

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 * Copyright (c) 2016 Justin Hibbits

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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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	evstdd	%r1,24+0*8(%r3)

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	evstdd	%r2,24+1*8(%r3)

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	evstdd	%r11,24+2*8(%r3)

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	evstdd	%r12,24+3*8(%r3)

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	evstdd	%r13,24+4*8(%r3)

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	evstdd	%r14,24+5*8(%r3)

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	evstdd	%r15,24+6*8(%r3)

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	evstdd	%r16,24+7*8(%r3)

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	evstdd	%r17,24+8*8(%r3)

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	evstdd	%r18,24+9*8(%r3)

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	evstdd	%r19,24+10*8(%r3)

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	evstdd	%r20,24+11*8(%r3)

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	evstdd	%r21,24+12*8(%r3)

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	evstdd	%r22,24+13*8(%r3)

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	evstdd	%r23,24+14*8(%r3)

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	evstdd	%r24,24+15*8(%r3)

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	evstdd	%r25,24+16*8(%r3)

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	evstdd	%r26,24+17*8(%r3)

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	evstdd	%r27,24+18*8(%r3)

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	evstdd	%r28,24+19*8(%r3)

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	evstdd	%r29,24+20*8(%r3)

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	evstdd	%r30,24+21*8(%r3)

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	evstdd	%r31,24+22*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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	evldd	%r1,24+0*8(%r3)

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	evldd	%r2,24+1*8(%r3)

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	evldd	%r11,24+2*8(%r3)

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	evldd	%r12,24+3*8(%r3)

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	evldd	%r13,24+4*8(%r3)

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	evldd	%r14,24+5*8(%r3)

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	evldd	%r15,24+6*8(%r3)

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	evldd	%r16,24+7*8(%r3)

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	evldd	%r17,24+8*8(%r3)

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	evldd	%r18,24+9*8(%r3)

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	evldd	%r19,24+10*8(%r3)

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	evldd	%r20,24+11*8(%r3)

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	evldd	%r21,24+12*8(%r3)

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	evldd	%r22,24+13*8(%r3)

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	evldd	%r23,24+14*8(%r3)

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	evldd	%r24,24+15*8(%r3)

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	evldd	%r25,24+16*8(%r3)

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	evldd	%r26,24+17*8(%r3)

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	evldd	%r27,24+18*8(%r3)

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	evldd	%r28,24+19*8(%r3)

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	evldd	%r29,24+20*8(%r3)

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	evldd	%r30,24+21*8(%r3)

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	evldd	%r31,24+22*8(%r3)

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	mtlr	%r11

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	mtcr	%r12

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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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