/* $NetBSD: _setjmp.S,v 1.3 2022/12/04 17:04:06 skrll 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 1.3 2022/12/04 17:04:06 skrll 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) REG_S zero, JB_MAGIC(a0) /* indicate no sigmask */ REG_S ra, JB_RA(a0) /* save return address */ REG_S sp, JB_SP(a0) /* save stack pointer */ REG_S gp, JB_GP(a0) /* save global pointer */ REG_S tp, JB_TP(a0) /* save thread pointer */ REG_S s0, JB_S0(a0) /* save callee saved register */ REG_S s1, JB_S1(a0) /* save callee saved register */ REG_S s2, JB_S2(a0) /* save callee saved register */ REG_S s3, JB_S3(a0) /* save callee saved register */ REG_S s4, JB_S4(a0) /* save callee saved register */ REG_S s5, JB_S5(a0) /* save callee saved register */ REG_S s6, JB_S6(a0) /* save callee saved register */ REG_S s7, JB_S7(a0) /* save callee saved register */ REG_S s8, JB_S8(a0) /* save callee saved register */ REG_S s9, JB_S9(a0) /* save callee saved register */ REG_S s10, JB_S10(a0) /* save callee saved register */ REG_S s11, JB_S11(a0) /* save callee saved register */ #ifndef _SOFT_FLOAT frcsr t2 /* get FSCR */ REG_S t2, JB_FCSR(a0) /* save it */ fsd fs0, JB_FS0(a0) /* save callee saved register */ fsd fs1, JB_FS1(a0) /* save callee saved register */ fsd fs2, JB_FS2(a0) /* save callee saved register */ fsd fs3, JB_FS3(a0) /* save callee saved register */ fsd fs4, JB_FS4(a0) /* save callee saved register */ fsd fs5, JB_FS5(a0) /* save callee saved register */ fsd fs6, JB_FS6(a0) /* save callee saved register */ fsd fs7, JB_FS7(a0) /* save callee saved register */ fsd fs8, JB_FS8(a0) /* save callee saved register */ fsd fs9, JB_FS9(a0) /* save callee saved register */ fsd fs10, JB_FS10(a0) /* save callee saved register */ fsd fs11, JB_FS11(a0) /* save callee saved register */ #endif li a0, 0 /* indicate success */ ret /* return */ END(_setjmp) ENTRY(_longjmp) REG_L ra, JB_RA(a0) /* save return address */ REG_L sp, JB_SP(a0) /* save stack pointer */ REG_L gp, JB_GP(a0) /* save global pointer */ #REG_L tp, JB_TP(a0) /* save thread pointer */ REG_L s0, JB_S0(a0) /* save callee saved register */ REG_L s1, JB_S1(a0) /* save callee saved register */ REG_L s2, JB_S2(a0) /* save callee saved register */ REG_L s3, JB_S3(a0) /* save callee saved register */ REG_L s4, JB_S4(a0) /* save callee saved register */ REG_L s5, JB_S5(a0) /* save callee saved register */ REG_L s6, JB_S6(a0) /* save callee saved register */ REG_L s7, JB_S7(a0) /* save callee saved register */ REG_L s8, JB_S8(a0) /* save callee saved register */ REG_L s9, JB_S9(a0) /* save callee saved register */ REG_L s10, JB_S10(a0) /* save callee saved register */ REG_L s11, JB_S11(a0) /* save callee saved register */ #ifndef _SOFT_FLOAT REG_L t2, JB_FCSR(a0) /* get it */ fscsr t2 /* restore FSCR */ fld fs0, JB_FS0(a0) /* restore callee saved register */ fld fs1, JB_FS1(a0) /* restore callee saved register */ fld fs2, JB_FS2(a0) /* restore callee saved register */ fld fs3, JB_FS3(a0) /* restore callee saved register */ fld fs4, JB_FS4(a0) /* restore callee saved register */ fld fs5, JB_FS5(a0) /* restore callee saved register */ fld fs6, JB_FS6(a0) /* restore callee saved register */ fld fs7, JB_FS7(a0) /* restore callee saved register */ fld fs8, JB_FS8(a0) /* restore callee saved register */ fld fs9, JB_FS9(a0) /* restore callee saved register */ fld fs10, JB_FS10(a0) /* restore callee saved register */ fld fs11, JB_FS11(a0) /* restore callee saved register */ #endif li a0, 1 /* default return value */ beqz a1, 1f /* test return value */ mv a0, a1 /* use it if not 0 */ 1: ret END(_longjmp)
