1178580Simp/* $NetBSD: longjmp.c,v 1.1 2005/09/17 11:49:39 tsutsui Exp $ */ 2178580Simp 3178580Simp/*- 4178580Simp * Copyright (c) 2003 The NetBSD Foundation, Inc. 5178580Simp * All rights reserved. 6178580Simp * 7178580Simp * This code is derived from software contributed to The NetBSD Foundation 8178580Simp * by Christian Limpach and Matt Thomas. 9178580Simp * 10178580Simp * Redistribution and use in source and binary forms, with or without 11178580Simp * modification, are permitted provided that the following conditions 12178580Simp * are met: 13178580Simp * 1. Redistributions of source code must retain the above copyright 14178580Simp * notice, this list of conditions and the following disclaimer. 15178580Simp * 2. Redistributions in binary form must reproduce the above copyright 16178580Simp * notice, this list of conditions and the following disclaimer in the 17178580Simp * documentation and/or other materials provided with the distribution. 18178580Simp * 19178580Simp * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20178580Simp * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21178580Simp * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22178580Simp * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23178580Simp * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24178580Simp * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25178580Simp * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26178580Simp * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27178580Simp * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28178580Simp * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29178580Simp * POSSIBILITY OF SUCH DAMAGE. 30178580Simp */ 31178580Simp 32178580Simp#include <sys/cdefs.h> 33178580Simp__FBSDID("$FreeBSD: releng/10.3/lib/libc/mips/gen/longjmp.c 251091 2013-05-29 01:54:10Z emaste $"); 34178580Simp#include "namespace.h" 35178580Simp#include <sys/types.h> 36178580Simp#include <ucontext.h> 37178580Simp#include <signal.h> 38178580Simp#include <stdlib.h> 39178580Simp#include <string.h> 40178580Simp 41178580Simp#include <machine/regnum.h> 42178580Simp 43178580Simpvoid 44178580Simp__longjmp14(jmp_buf env, int val) 45178580Simp{ 46178580Simp struct sigcontext *sc = (void *)env; 47178580Simp ucontext_t uc; 48178580Simp 49178580Simp /* Ensure non-zero SP and sigcontext magic number is present */ 50178580Simp if (sc->sc_regs[_R_SP] == 0 || sc->sc_regs[_R_ZERO] != 0xACEDBADE) 51178580Simp goto err; 52178580Simp 53178580Simp /* Ensure non-zero return value */ 54178580Simp if (val == 0) 55178580Simp val = 1; 56178580Simp 57178580Simp /* 58178580Simp * Set _UC_{SET,CLR}STACK according to SS_ONSTACK. 59178580Simp * 60178580Simp * Restore the signal mask with sigprocmask() instead of _UC_SIGMASK, 61178580Simp * since libpthread may want to interpose on signal handling. 62178580Simp */ 63178580Simp uc.uc_flags = _UC_CPU | (sc->sc_onstack ? _UC_SETSTACK : _UC_CLRSTACK); 64178580Simp 65178580Simp sigprocmask(SIG_SETMASK, &sc->sc_mask, NULL); 66178580Simp 67178580Simp /* Clear uc_link */ 68178580Simp uc.uc_link = 0; 69178580Simp 70178580Simp /* Save return value in context */ 71178580Simp uc.uc_mcontext.__gregs[_R_V0] = val; 72178580Simp 73178580Simp /* Copy saved registers */ 74178580Simp uc.uc_mcontext.__gregs[_REG_S0] = sc->sc_regs[_R_S0]; 75178580Simp uc.uc_mcontext.__gregs[_REG_S1] = sc->sc_regs[_R_S1]; 76178580Simp uc.uc_mcontext.__gregs[_REG_S2] = sc->sc_regs[_R_S2]; 77178580Simp uc.uc_mcontext.__gregs[_REG_S3] = sc->sc_regs[_R_S3]; 78178580Simp uc.uc_mcontext.__gregs[_REG_S4] = sc->sc_regs[_R_S4]; 79178580Simp uc.uc_mcontext.__gregs[_REG_S5] = sc->sc_regs[_R_S5]; 80178580Simp uc.uc_mcontext.__gregs[_REG_S6] = sc->sc_regs[_R_S6]; 81178580Simp uc.uc_mcontext.__gregs[_REG_S7] = sc->sc_regs[_R_S7]; 82178580Simp uc.uc_mcontext.__gregs[_REG_S8] = sc->sc_regs[_R_S8]; 83178580Simp uc.uc_mcontext.__gregs[_REG_SP] = sc->sc_regs[_R_SP]; 84178580Simp uc.uc_mcontext.__gregs[_REG_RA] = sc->sc_regs[_R_RA]; 85178580Simp uc.uc_mcontext.__gregs[_REG_EPC] = sc->sc_pc; 86178580Simp 87178580Simp /* Copy FP state */ 88178580Simp if (sc->sc_fpused) { 89178580Simp /* FP saved regs are $f20 .. $f31 */ 90178580Simp memcpy(&uc.uc_mcontext.__fpregs.__fp_r.__fp_regs[20], 91178580Simp &sc->sc_fpregs[20], 32 - 20); 92178580Simp uc.uc_mcontext.__fpregs.__fp_csr = 93178580Simp sc->sc_fpregs[_R_FSR - _FPBASE]; 94178580Simp /* XXX sc_fp_control */ 95178580Simp uc.uc_flags |= _UC_FPU; 96178580Simp } 97178580Simp 98178580Simp setcontext(&uc); 99178580Simp err: 100178580Simp longjmperror(); 101178580Simp abort(); 102178580Simp /* NOTREACHED */ 103178580Simp} 104