/* $NetBSD: _setjmp.S,v 1.1 2014/09/03 19:34:25 matt Exp $ */ /*- * Copyright (c) 2014 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Matt Thomas of 3am Software Foundry. * * 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 <machine/asm.h> #include "assym.h" #if defined(LIBC_SCCS) __RCSID("$NetBSD: _setjmp.S,v 1.1 2014/09/03 19:34:25 matt Exp $") #endif /* * C library -- _setjmp, _longjmp * * _longjmp(a,v) * will generate a "return(v?v:1)" from the last call to * _setjmp(a) * by restoring registers from the stack. * The previous signal state is NOT restored. */ ENTRY(_setjmp) l.sw JB_MAGIC(r3), r0 /* indicate no sigmask */ l.sw JB_PC(r3), lr /* save return address */ l.sw JB_LR(r3), lr /* save return address */ l.sw JB_SP(r3), r1 /* save stack pointer */ l.sw JB_FP(r3), r2 /* save frame pointer */ l.sw JB_R10(r3), r10 /* save callee saved register */ l.sw JB_R14(r3), r14 /* save callee saved register */ l.sw JB_R16(r3), r16 /* save callee saved register */ l.sw JB_R18(r3), r18 /* save callee saved register */ l.sw JB_R20(r3), r20 /* save callee saved register */ l.sw JB_R22(r3), r22 /* save callee saved register */ l.sw JB_R24(r3), r24 /* save callee saved register */ l.sw JB_R26(r3), r26 /* save callee saved register */ l.sw JB_R28(r3), r28 /* save callee saved register */ l.sw JB_R30(r3), r30 /* save callee saved register */ l.xor r11, r11, r11 /* indicate success */ l.jr lr /* return */ l.nop END(_setjmp) ENTRY(_longjmp) l.lwz lr, JB_LR(r3) /* get return address */ l.lwz r1, JB_SP(r3) /* get stack pointer */ l.lwz r2, JB_FP(r3) /* get frame pointer */ l.lwz r10, JB_R10(r3) /* get callee saved register */ l.lwz r14, JB_R14(r3) /* get callee saved register */ l.lwz r16, JB_R16(r3) /* get callee saved register */ l.lwz r18, JB_R18(r3) /* get callee saved register */ l.lwz r20, JB_R20(r3) /* get callee saved register */ l.lwz r22, JB_R22(r3) /* get callee saved register */ l.lwz r24, JB_R24(r3) /* get callee saved register */ l.lwz r26, JB_R26(r3) /* get callee saved register */ l.lwz r28, JB_R28(r3) /* get callee saved register */ l.lwz r30, JB_R30(r3) /* get callee saved register */ l.ori r11, r0, 1 /* default return value */ l.sfeqi r4, 0 /* test return value */ l.cmov r11, r11, r4 /* use it if not 0 */ l.jr lr /* return */ l.nop END(_longjmp) |