__longjmp14.c revision 1.6
1/* $NetBSD: __longjmp14.c,v 1.6 2024/06/29 06:52:34 rin Exp $ */ 2 3/*- 4 * Copyright (c) 2003 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Christian Limpach and Matt Thomas. 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 "namespace.h" 33#include <sys/types.h> 34#include <ucontext.h> 35#include <signal.h> 36#include <stdlib.h> 37#include <string.h> 38#include <machine/reg.h> 39 40#define __LIBC12_SOURCE__ 41#include <setjmp.h> 42#include <compat/include/setjmp.h> 43 44struct _jmp_buf { 45 struct sigcontext jb_sc; 46 __register_t jb_regs[6]; 47}; 48 49void 50__longjmp14(jmp_buf env, int val) 51{ 52 struct _jmp_buf *jb = (void *)env; 53 ucontext_t uc; 54 55 /* Ensure non-zero SP */ 56 if (jb->jb_sc.sc_sp == 0) 57 goto err; 58 59 /* Return 1 if val is zero */ 60 if (val == 0) 61 val = 1; 62 63 /* Set _UC_SIGMASK and _UC_CPU */ 64 uc.uc_flags = _UC_SIGMASK | _UC_CPU; 65 66 /* Clear uc_link */ 67 uc.uc_link = 0; 68 69 /* Save return value in context */ 70 uc.uc_mcontext.__gregs[_REG_R0] = val; 71 72 /* Copy saved registers */ 73 uc.uc_mcontext.__gregs[_REG_AP] = jb->jb_sc.sc_ap; 74 uc.uc_mcontext.__gregs[_REG_SP] = jb->jb_sc.sc_sp; 75 uc.uc_mcontext.__gregs[_REG_FP] = jb->jb_sc.sc_fp; 76 uc.uc_mcontext.__gregs[_REG_PC] = jb->jb_sc.sc_pc; 77 uc.uc_mcontext.__gregs[_REG_PSL] = jb->jb_sc.sc_ps; 78 79 uc.uc_mcontext.__gregs[_REG_R6] = jb->jb_regs[0]; 80 uc.uc_mcontext.__gregs[_REG_R7] = jb->jb_regs[1]; 81 uc.uc_mcontext.__gregs[_REG_R8] = jb->jb_regs[2]; 82 uc.uc_mcontext.__gregs[_REG_R9] = jb->jb_regs[3]; 83 uc.uc_mcontext.__gregs[_REG_R10] = jb->jb_regs[4]; 84 uc.uc_mcontext.__gregs[_REG_R11] = jb->jb_regs[5]; 85 86 /* Copy signal mask */ 87 uc.uc_sigmask = jb->jb_sc.sc_mask; 88 89 setcontext(&uc); 90 err: 91 longjmperror(); 92 abort(); 93 /* NOTREACHED */ 94} 95