17c478bd9Sstevel@tonic-gate /* 27c478bd9Sstevel@tonic-gate * CDDL HEADER START 37c478bd9Sstevel@tonic-gate * 47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 57c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 67c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 77c478bd9Sstevel@tonic-gate * with the License. 87c478bd9Sstevel@tonic-gate * 97c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 107c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 117c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 127c478bd9Sstevel@tonic-gate * and limitations under the License. 137c478bd9Sstevel@tonic-gate * 147c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 157c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 167c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 177c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 187c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 197c478bd9Sstevel@tonic-gate * 207c478bd9Sstevel@tonic-gate * CDDL HEADER END 217c478bd9Sstevel@tonic-gate */ 22*e8031f0aSraf 237c478bd9Sstevel@tonic-gate /* 24*e8031f0aSraf * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 257c478bd9Sstevel@tonic-gate * Use is subject to license terms. 267c478bd9Sstevel@tonic-gate */ 277c478bd9Sstevel@tonic-gate 287c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 297c478bd9Sstevel@tonic-gate 307c478bd9Sstevel@tonic-gate /* Copyright (c) 1988 AT&T */ 317c478bd9Sstevel@tonic-gate /* All Rights Reserved */ 327c478bd9Sstevel@tonic-gate 337c478bd9Sstevel@tonic-gate 347c478bd9Sstevel@tonic-gate #pragma weak siglongjmp = _siglongjmp 357c478bd9Sstevel@tonic-gate 36*e8031f0aSraf #include "synonyms.h" 377c478bd9Sstevel@tonic-gate #include <sys/types.h> 387c478bd9Sstevel@tonic-gate #include <sys/stack.h> 397c478bd9Sstevel@tonic-gate #include <sys/frame.h> 407c478bd9Sstevel@tonic-gate #include <memory.h> 417c478bd9Sstevel@tonic-gate #include <ucontext.h> 427c478bd9Sstevel@tonic-gate #include <setjmp.h> 437c478bd9Sstevel@tonic-gate #include "sigjmp_struct.h" 447c478bd9Sstevel@tonic-gate #include "libc.h" 457c478bd9Sstevel@tonic-gate 467c478bd9Sstevel@tonic-gate void 47*e8031f0aSraf siglongjmp(sigjmp_buf env, int val) 487c478bd9Sstevel@tonic-gate { 497c478bd9Sstevel@tonic-gate extern void _fetch_globals(greg_t *); 507c478bd9Sstevel@tonic-gate ucontext_t uc; 517c478bd9Sstevel@tonic-gate greg_t *reg = uc.uc_mcontext.gregs; 527c478bd9Sstevel@tonic-gate volatile sigjmp_struct_t *bp = (sigjmp_struct_t *)env; 537c478bd9Sstevel@tonic-gate greg_t fp = bp->sjs_fp; 547c478bd9Sstevel@tonic-gate greg_t i7 = bp->sjs_i7; 557c478bd9Sstevel@tonic-gate 567c478bd9Sstevel@tonic-gate /* 577c478bd9Sstevel@tonic-gate * Create a ucontext_t structure from scratch. 587c478bd9Sstevel@tonic-gate * We only need to fetch the globals. 597c478bd9Sstevel@tonic-gate * The outs are assumed to be trashed on return from sigsetjmp(). 607c478bd9Sstevel@tonic-gate * The ins and locals are restored from the resumed register window. 617c478bd9Sstevel@tonic-gate * The floating point state is unmodified. 627c478bd9Sstevel@tonic-gate * Everything else is in the sigjmp_struct_t buffer. 637c478bd9Sstevel@tonic-gate */ 647c478bd9Sstevel@tonic-gate (void) memset(&uc, 0, sizeof (uc)); 657c478bd9Sstevel@tonic-gate uc.uc_flags = UC_STACK | UC_CPU; 667c478bd9Sstevel@tonic-gate _fetch_globals(®[REG_G1]); 677c478bd9Sstevel@tonic-gate uc.uc_stack = bp->sjs_stack; 687c478bd9Sstevel@tonic-gate uc.uc_link = bp->sjs_uclink; 697c478bd9Sstevel@tonic-gate reg[REG_PC] = bp->sjs_pc; 707c478bd9Sstevel@tonic-gate reg[REG_nPC] = reg[REG_PC] + 0x4; 717c478bd9Sstevel@tonic-gate reg[REG_SP] = bp->sjs_sp; 727c478bd9Sstevel@tonic-gate 737c478bd9Sstevel@tonic-gate if (bp->sjs_flags & JB_SAVEMASK) { 747c478bd9Sstevel@tonic-gate uc.uc_flags |= UC_SIGMASK; 757c478bd9Sstevel@tonic-gate uc.uc_sigmask = bp->sjs_sigmask; 767c478bd9Sstevel@tonic-gate } 777c478bd9Sstevel@tonic-gate 787c478bd9Sstevel@tonic-gate if (val) 797c478bd9Sstevel@tonic-gate reg[REG_O0] = (greg_t)val; 807c478bd9Sstevel@tonic-gate else 817c478bd9Sstevel@tonic-gate reg[REG_O0] = (greg_t)1; 827c478bd9Sstevel@tonic-gate 837c478bd9Sstevel@tonic-gate /* 847c478bd9Sstevel@tonic-gate * Copy the fp and i7 values into the register window save area. 857c478bd9Sstevel@tonic-gate * These may have been clobbered between calls to sigsetjmp 867c478bd9Sstevel@tonic-gate * and siglongjmp. For example, the save area could have been 877c478bd9Sstevel@tonic-gate * relocated to lower addresses and the original save area 887c478bd9Sstevel@tonic-gate * given to an alloca() call. Notice that all reads from 897c478bd9Sstevel@tonic-gate * the sigjmp_struct_t buffer should take place before the 907c478bd9Sstevel@tonic-gate * following two writes. It is possible that user code may 917c478bd9Sstevel@tonic-gate * move/copy the sigjmpbuf around, and overlap the original 927c478bd9Sstevel@tonic-gate * register window save area. 937c478bd9Sstevel@tonic-gate */ 947c478bd9Sstevel@tonic-gate if (bp->sjs_sp != 0 && (bp->sjs_flags & JB_FRAMEPTR)) { 957c478bd9Sstevel@tonic-gate struct frame *sp = (struct frame *)(bp->sjs_sp + STACK_BIAS); 967c478bd9Sstevel@tonic-gate sp->fr_savfp = (struct frame *)fp; 977c478bd9Sstevel@tonic-gate sp->fr_savpc = i7; 987c478bd9Sstevel@tonic-gate } 997c478bd9Sstevel@tonic-gate 1007c478bd9Sstevel@tonic-gate (void) setcontext(&uc); 1017c478bd9Sstevel@tonic-gate } 102