1*7c478bd9Sstevel@tonic-gate /* 2*7c478bd9Sstevel@tonic-gate * CDDL HEADER START 3*7c478bd9Sstevel@tonic-gate * 4*7c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*7c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*7c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*7c478bd9Sstevel@tonic-gate * with the License. 8*7c478bd9Sstevel@tonic-gate * 9*7c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*7c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*7c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 12*7c478bd9Sstevel@tonic-gate * and limitations under the License. 13*7c478bd9Sstevel@tonic-gate * 14*7c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*7c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*7c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*7c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*7c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*7c478bd9Sstevel@tonic-gate * 20*7c478bd9Sstevel@tonic-gate * CDDL HEADER END 21*7c478bd9Sstevel@tonic-gate */ 22*7c478bd9Sstevel@tonic-gate /* 23*7c478bd9Sstevel@tonic-gate * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 24*7c478bd9Sstevel@tonic-gate * Use is subject to license terms. 25*7c478bd9Sstevel@tonic-gate */ 26*7c478bd9Sstevel@tonic-gate 27*7c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 28*7c478bd9Sstevel@tonic-gate 29*7c478bd9Sstevel@tonic-gate /* Copyright (c) 1988 AT&T */ 30*7c478bd9Sstevel@tonic-gate /* All Rights Reserved */ 31*7c478bd9Sstevel@tonic-gate 32*7c478bd9Sstevel@tonic-gate 33*7c478bd9Sstevel@tonic-gate #pragma weak siglongjmp = _siglongjmp 34*7c478bd9Sstevel@tonic-gate 35*7c478bd9Sstevel@tonic-gate #include "lint.h" 36*7c478bd9Sstevel@tonic-gate #include <sys/types.h> 37*7c478bd9Sstevel@tonic-gate #include <sys/stack.h> 38*7c478bd9Sstevel@tonic-gate #include <sys/frame.h> 39*7c478bd9Sstevel@tonic-gate #include <memory.h> 40*7c478bd9Sstevel@tonic-gate #include <ucontext.h> 41*7c478bd9Sstevel@tonic-gate #include <setjmp.h> 42*7c478bd9Sstevel@tonic-gate #include "sigjmp_struct.h" 43*7c478bd9Sstevel@tonic-gate #include "libc.h" 44*7c478bd9Sstevel@tonic-gate 45*7c478bd9Sstevel@tonic-gate void 46*7c478bd9Sstevel@tonic-gate _siglongjmp(sigjmp_buf env, int val) 47*7c478bd9Sstevel@tonic-gate { 48*7c478bd9Sstevel@tonic-gate extern void _fetch_globals(greg_t *); 49*7c478bd9Sstevel@tonic-gate ucontext_t uc; 50*7c478bd9Sstevel@tonic-gate greg_t *reg = uc.uc_mcontext.gregs; 51*7c478bd9Sstevel@tonic-gate volatile sigjmp_struct_t *bp = (sigjmp_struct_t *)env; 52*7c478bd9Sstevel@tonic-gate greg_t fp = bp->sjs_fp; 53*7c478bd9Sstevel@tonic-gate greg_t i7 = bp->sjs_i7; 54*7c478bd9Sstevel@tonic-gate 55*7c478bd9Sstevel@tonic-gate /* 56*7c478bd9Sstevel@tonic-gate * Create a ucontext_t structure from scratch. 57*7c478bd9Sstevel@tonic-gate * We only need to fetch the globals. 58*7c478bd9Sstevel@tonic-gate * The outs are assumed to be trashed on return from sigsetjmp(). 59*7c478bd9Sstevel@tonic-gate * The ins and locals are restored from the resumed register window. 60*7c478bd9Sstevel@tonic-gate * The floating point state is unmodified. 61*7c478bd9Sstevel@tonic-gate * Everything else is in the sigjmp_struct_t buffer. 62*7c478bd9Sstevel@tonic-gate */ 63*7c478bd9Sstevel@tonic-gate (void) memset(&uc, 0, sizeof (uc)); 64*7c478bd9Sstevel@tonic-gate uc.uc_flags = UC_STACK | UC_CPU; 65*7c478bd9Sstevel@tonic-gate _fetch_globals(®[REG_G1]); 66*7c478bd9Sstevel@tonic-gate uc.uc_stack = bp->sjs_stack; 67*7c478bd9Sstevel@tonic-gate uc.uc_link = bp->sjs_uclink; 68*7c478bd9Sstevel@tonic-gate reg[REG_PC] = bp->sjs_pc; 69*7c478bd9Sstevel@tonic-gate reg[REG_nPC] = reg[REG_PC] + 0x4; 70*7c478bd9Sstevel@tonic-gate reg[REG_SP] = bp->sjs_sp; 71*7c478bd9Sstevel@tonic-gate 72*7c478bd9Sstevel@tonic-gate if (bp->sjs_flags & JB_SAVEMASK) { 73*7c478bd9Sstevel@tonic-gate uc.uc_flags |= UC_SIGMASK; 74*7c478bd9Sstevel@tonic-gate uc.uc_sigmask = bp->sjs_sigmask; 75*7c478bd9Sstevel@tonic-gate } 76*7c478bd9Sstevel@tonic-gate 77*7c478bd9Sstevel@tonic-gate if (val) 78*7c478bd9Sstevel@tonic-gate reg[REG_O0] = (greg_t)val; 79*7c478bd9Sstevel@tonic-gate else 80*7c478bd9Sstevel@tonic-gate reg[REG_O0] = (greg_t)1; 81*7c478bd9Sstevel@tonic-gate 82*7c478bd9Sstevel@tonic-gate /* 83*7c478bd9Sstevel@tonic-gate * Copy the fp and i7 values into the register window save area. 84*7c478bd9Sstevel@tonic-gate * These may have been clobbered between calls to sigsetjmp 85*7c478bd9Sstevel@tonic-gate * and siglongjmp. For example, the save area could have been 86*7c478bd9Sstevel@tonic-gate * relocated to lower addresses and the original save area 87*7c478bd9Sstevel@tonic-gate * given to an alloca() call. Notice that all reads from 88*7c478bd9Sstevel@tonic-gate * the sigjmp_struct_t buffer should take place before the 89*7c478bd9Sstevel@tonic-gate * following two writes. It is possible that user code may 90*7c478bd9Sstevel@tonic-gate * move/copy the sigjmpbuf around, and overlap the original 91*7c478bd9Sstevel@tonic-gate * register window save area. 92*7c478bd9Sstevel@tonic-gate */ 93*7c478bd9Sstevel@tonic-gate if (bp->sjs_sp != 0 && (bp->sjs_flags & JB_FRAMEPTR)) { 94*7c478bd9Sstevel@tonic-gate struct frame *sp = (struct frame *)(bp->sjs_sp + STACK_BIAS); 95*7c478bd9Sstevel@tonic-gate sp->fr_savfp = (struct frame *)fp; 96*7c478bd9Sstevel@tonic-gate sp->fr_savpc = i7; 97*7c478bd9Sstevel@tonic-gate } 98*7c478bd9Sstevel@tonic-gate 99*7c478bd9Sstevel@tonic-gate (void) setcontext(&uc); 100*7c478bd9Sstevel@tonic-gate } 101