1/* $NetBSD: _setjmp.S,v 1.1 2014/09/03 19:34:25 matt Exp $ */ 2 3/*- 4 * Copyright (c) 2014 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Matt Thomas of 3am Software Foundry. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32#include <machine/asm.h> 33#include "assym.h" 34 35#if defined(LIBC_SCCS) 36__RCSID("$NetBSD: _setjmp.S,v 1.1 2014/09/03 19:34:25 matt Exp $") 37#endif 38 39/* 40 * C library -- _setjmp, _longjmp 41 * 42 * _longjmp(a,v) 43 * will generate a "return(v?v:1)" from the last call to 44 * _setjmp(a) 45 * by restoring registers from the stack. 46 * The previous signal state is NOT restored. 47 */ 48 49ENTRY(_setjmp) 50 l.sw JB_MAGIC(r3), r0 /* indicate no sigmask */ 51 l.sw JB_PC(r3), lr /* save return address */ 52 l.sw JB_LR(r3), lr /* save return address */ 53 l.sw JB_SP(r3), r1 /* save stack pointer */ 54 l.sw JB_FP(r3), r2 /* save frame pointer */ 55 l.sw JB_R10(r3), r10 /* save callee saved register */ 56 l.sw JB_R14(r3), r14 /* save callee saved register */ 57 l.sw JB_R16(r3), r16 /* save callee saved register */ 58 l.sw JB_R18(r3), r18 /* save callee saved register */ 59 l.sw JB_R20(r3), r20 /* save callee saved register */ 60 l.sw JB_R22(r3), r22 /* save callee saved register */ 61 l.sw JB_R24(r3), r24 /* save callee saved register */ 62 l.sw JB_R26(r3), r26 /* save callee saved register */ 63 l.sw JB_R28(r3), r28 /* save callee saved register */ 64 l.sw JB_R30(r3), r30 /* save callee saved register */ 65 l.xor r11, r11, r11 /* indicate success */ 66 l.jr lr /* return */ 67 l.nop 68END(_setjmp) 69 70ENTRY(_longjmp) 71 l.lwz lr, JB_LR(r3) /* get return address */ 72 l.lwz r1, JB_SP(r3) /* get stack pointer */ 73 l.lwz r2, JB_FP(r3) /* get frame pointer */ 74 l.lwz r10, JB_R10(r3) /* get callee saved register */ 75 l.lwz r14, JB_R14(r3) /* get callee saved register */ 76 l.lwz r16, JB_R16(r3) /* get callee saved register */ 77 l.lwz r18, JB_R18(r3) /* get callee saved register */ 78 l.lwz r20, JB_R20(r3) /* get callee saved register */ 79 l.lwz r22, JB_R22(r3) /* get callee saved register */ 80 l.lwz r24, JB_R24(r3) /* get callee saved register */ 81 l.lwz r26, JB_R26(r3) /* get callee saved register */ 82 l.lwz r28, JB_R28(r3) /* get callee saved register */ 83 l.lwz r30, JB_R30(r3) /* get callee saved register */ 84 l.ori r11, r0, 1 /* default return value */ 85 l.sfeqi r4, 0 /* test return value */ 86 l.cmov r11, r11, r4 /* use it if not 0 */ 87 l.jr lr /* return */ 88 l.nop 89END(_longjmp) 90