10Sstevel@tonic-gate /* 20Sstevel@tonic-gate * CDDL HEADER START 30Sstevel@tonic-gate * 40Sstevel@tonic-gate * The contents of this file are subject to the terms of the 50Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 60Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 70Sstevel@tonic-gate * with the License. 80Sstevel@tonic-gate * 90Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 100Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 110Sstevel@tonic-gate * See the License for the specific language governing permissions 120Sstevel@tonic-gate * and limitations under the License. 130Sstevel@tonic-gate * 140Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 150Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 160Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 170Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 180Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 190Sstevel@tonic-gate * 200Sstevel@tonic-gate * CDDL HEADER END 210Sstevel@tonic-gate */ 22*1219Sraf 230Sstevel@tonic-gate /* 24*1219Sraf * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 250Sstevel@tonic-gate * Use is subject to license terms. 260Sstevel@tonic-gate */ 270Sstevel@tonic-gate 280Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 290Sstevel@tonic-gate 300Sstevel@tonic-gate /* Copyright (c) 1988 AT&T */ 310Sstevel@tonic-gate /* All Rights Reserved */ 320Sstevel@tonic-gate 330Sstevel@tonic-gate 340Sstevel@tonic-gate #pragma weak siglongjmp = _siglongjmp 350Sstevel@tonic-gate 36*1219Sraf #include "synonyms.h" 370Sstevel@tonic-gate #include <sys/types.h> 380Sstevel@tonic-gate #include <sys/stack.h> 390Sstevel@tonic-gate #include <sys/frame.h> 400Sstevel@tonic-gate #include <memory.h> 410Sstevel@tonic-gate #include <ucontext.h> 420Sstevel@tonic-gate #include <setjmp.h> 430Sstevel@tonic-gate #include "sigjmp_struct.h" 440Sstevel@tonic-gate #include "libc.h" 450Sstevel@tonic-gate 460Sstevel@tonic-gate void 47*1219Sraf siglongjmp(sigjmp_buf env, int val) 480Sstevel@tonic-gate { 490Sstevel@tonic-gate extern void _fetch_globals(greg_t *); 500Sstevel@tonic-gate ucontext_t uc; 510Sstevel@tonic-gate greg_t *reg = uc.uc_mcontext.gregs; 520Sstevel@tonic-gate volatile sigjmp_struct_t *bp = (sigjmp_struct_t *)env; 530Sstevel@tonic-gate greg_t fp = bp->sjs_fp; 540Sstevel@tonic-gate greg_t i7 = bp->sjs_i7; 550Sstevel@tonic-gate 560Sstevel@tonic-gate /* 570Sstevel@tonic-gate * Create a ucontext_t structure from scratch. 580Sstevel@tonic-gate * We only need to fetch the globals. 590Sstevel@tonic-gate * The outs are assumed to be trashed on return from sigsetjmp(). 600Sstevel@tonic-gate * The ins and locals are restored from the resumed register window. 610Sstevel@tonic-gate * The floating point state is unmodified. 620Sstevel@tonic-gate * Everything else is in the sigjmp_struct_t buffer. 630Sstevel@tonic-gate */ 640Sstevel@tonic-gate (void) memset(&uc, 0, sizeof (uc)); 650Sstevel@tonic-gate uc.uc_flags = UC_STACK | UC_CPU; 660Sstevel@tonic-gate _fetch_globals(®[REG_G1]); 670Sstevel@tonic-gate uc.uc_stack = bp->sjs_stack; 680Sstevel@tonic-gate uc.uc_link = bp->sjs_uclink; 690Sstevel@tonic-gate reg[REG_PC] = bp->sjs_pc; 700Sstevel@tonic-gate reg[REG_nPC] = reg[REG_PC] + 0x4; 710Sstevel@tonic-gate reg[REG_SP] = bp->sjs_sp; 720Sstevel@tonic-gate 730Sstevel@tonic-gate if (bp->sjs_flags & JB_SAVEMASK) { 740Sstevel@tonic-gate uc.uc_flags |= UC_SIGMASK; 750Sstevel@tonic-gate uc.uc_sigmask = bp->sjs_sigmask; 760Sstevel@tonic-gate } 770Sstevel@tonic-gate 780Sstevel@tonic-gate if (val) 790Sstevel@tonic-gate reg[REG_O0] = (greg_t)val; 800Sstevel@tonic-gate else 810Sstevel@tonic-gate reg[REG_O0] = (greg_t)1; 820Sstevel@tonic-gate 830Sstevel@tonic-gate /* 840Sstevel@tonic-gate * Copy the fp and i7 values into the register window save area. 850Sstevel@tonic-gate * These may have been clobbered between calls to sigsetjmp 860Sstevel@tonic-gate * and siglongjmp. For example, the save area could have been 870Sstevel@tonic-gate * relocated to lower addresses and the original save area 880Sstevel@tonic-gate * given to an alloca() call. Notice that all reads from 890Sstevel@tonic-gate * the sigjmp_struct_t buffer should take place before the 900Sstevel@tonic-gate * following two writes. It is possible that user code may 910Sstevel@tonic-gate * move/copy the sigjmpbuf around, and overlap the original 920Sstevel@tonic-gate * register window save area. 930Sstevel@tonic-gate */ 940Sstevel@tonic-gate if (bp->sjs_sp != 0 && (bp->sjs_flags & JB_FRAMEPTR)) { 950Sstevel@tonic-gate struct frame *sp = (struct frame *)(bp->sjs_sp + STACK_BIAS); 960Sstevel@tonic-gate sp->fr_savfp = (struct frame *)fp; 970Sstevel@tonic-gate sp->fr_savpc = i7; 980Sstevel@tonic-gate } 990Sstevel@tonic-gate 1000Sstevel@tonic-gate (void) setcontext(&uc); 1010Sstevel@tonic-gate } 102