__longjmp14.c revision 1.3
1/* $NetBSD: __longjmp14.c,v 1.3 2005/09/14 13:46:32 he 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39#include "namespace.h" 40#include <sys/types.h> 41#include <ucontext.h> 42#include <signal.h> 43#include <stdlib.h> 44#include <string.h> 45#include <machine/reg.h> 46 47#define __LIBC12_SOURCE__ 48#include <setjmp.h> 49#include <compat/include/setjmp.h> 50 51struct _jmp_buf { 52 struct sigcontext jb_sc; 53 register_t jb_regs[6]; 54}; 55 56void 57__longjmp14(jmp_buf env, int val) 58{ 59 struct _jmp_buf *jb = (void *)env; 60 ucontext_t uc; 61 62 /* Ensure non-zero SP */ 63 if (jb->jb_sc.sc_sp == 0) 64 goto err; 65 66 /* Ensure non-zero return value */ 67 if (val == 0) 68 val = -1; 69 70 /* Set _UC_SIGMASK and _UC_CPU */ 71 uc.uc_flags = _UC_SIGMASK | _UC_CPU; 72 73 /* Clear uc_link */ 74 uc.uc_link = 0; 75 76 /* Save return value in context */ 77 uc.uc_mcontext.__gregs[_REG_R0] = val; 78 79 /* Copy saved registers */ 80 uc.uc_mcontext.__gregs[_REG_AP] = jb->jb_sc.sc_ap; 81 uc.uc_mcontext.__gregs[_REG_SP] = jb->jb_sc.sc_sp; 82 uc.uc_mcontext.__gregs[_REG_FP] = jb->jb_sc.sc_fp; 83 uc.uc_mcontext.__gregs[_REG_PC] = jb->jb_sc.sc_pc; 84 uc.uc_mcontext.__gregs[_REG_PSL] = jb->jb_sc.sc_ps; 85 86 uc.uc_mcontext.__gregs[_REG_R6] = jb->jb_regs[0]; 87 uc.uc_mcontext.__gregs[_REG_R7] = jb->jb_regs[1]; 88 uc.uc_mcontext.__gregs[_REG_R8] = jb->jb_regs[2]; 89 uc.uc_mcontext.__gregs[_REG_R9] = jb->jb_regs[3]; 90 uc.uc_mcontext.__gregs[_REG_R10] = jb->jb_regs[4]; 91 uc.uc_mcontext.__gregs[_REG_R11] = jb->jb_regs[5]; 92 93 /* Copy signal mask */ 94 uc.uc_sigmask = jb->jb_sc.sc_mask; 95 96 setcontext(&uc); 97 err: 98 longjmperror(); 99 abort(); 100 /* NOTREACHED */ 101} 102