1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 23 /* 24 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 25 * Use is subject to license terms. 26 */ 27 28 #pragma ident "%Z%%M% %I% %E% SMI" 29 30 /* Copyright (c) 1988 AT&T */ 31 /* All Rights Reserved */ 32 33 34 #pragma weak siglongjmp = _siglongjmp 35 36 #include "synonyms.h" 37 #include <sys/types.h> 38 #include <sys/stack.h> 39 #include <sys/frame.h> 40 #include <memory.h> 41 #include <ucontext.h> 42 #include <setjmp.h> 43 #include "sigjmp_struct.h" 44 #include "libc.h" 45 46 void 47 siglongjmp(sigjmp_buf env, int val) 48 { 49 extern void _fetch_globals(greg_t *); 50 ucontext_t uc; 51 greg_t *reg = uc.uc_mcontext.gregs; 52 volatile sigjmp_struct_t *bp = (sigjmp_struct_t *)env; 53 greg_t fp = bp->sjs_fp; 54 greg_t i7 = bp->sjs_i7; 55 56 /* 57 * Create a ucontext_t structure from scratch. 58 * We only need to fetch the globals. 59 * The outs are assumed to be trashed on return from sigsetjmp(). 60 * The ins and locals are restored from the resumed register window. 61 * The floating point state is unmodified. 62 * Everything else is in the sigjmp_struct_t buffer. 63 */ 64 (void) memset(&uc, 0, sizeof (uc)); 65 uc.uc_flags = UC_STACK | UC_CPU; 66 _fetch_globals(®[REG_G1]); 67 uc.uc_stack = bp->sjs_stack; 68 uc.uc_link = bp->sjs_uclink; 69 reg[REG_PC] = bp->sjs_pc; 70 reg[REG_nPC] = reg[REG_PC] + 0x4; 71 reg[REG_SP] = bp->sjs_sp; 72 73 if (bp->sjs_flags & JB_SAVEMASK) { 74 uc.uc_flags |= UC_SIGMASK; 75 uc.uc_sigmask = bp->sjs_sigmask; 76 } 77 78 if (val) 79 reg[REG_O0] = (greg_t)val; 80 else 81 reg[REG_O0] = (greg_t)1; 82 83 /* 84 * Copy the fp and i7 values into the register window save area. 85 * These may have been clobbered between calls to sigsetjmp 86 * and siglongjmp. For example, the save area could have been 87 * relocated to lower addresses and the original save area 88 * given to an alloca() call. Notice that all reads from 89 * the sigjmp_struct_t buffer should take place before the 90 * following two writes. It is possible that user code may 91 * move/copy the sigjmpbuf around, and overlap the original 92 * register window save area. 93 */ 94 if (bp->sjs_sp != 0 && (bp->sjs_flags & JB_FRAMEPTR)) { 95 struct frame *sp = (struct frame *)(bp->sjs_sp + STACK_BIAS); 96 sp->fr_savfp = (struct frame *)fp; 97 sp->fr_savpc = i7; 98 } 99 100 (void) setcontext(&uc); 101 } 102