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 57257d1b4Sraf * Common Development and Distribution License (the "License"). 67257d1b4Sraf * You may not use this file except in compliance with the License. 77c478bd9Sstevel@tonic-gate * 87c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 97c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 107c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 117c478bd9Sstevel@tonic-gate * and limitations under the License. 127c478bd9Sstevel@tonic-gate * 137c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 147c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 157c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 167c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 177c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 187c478bd9Sstevel@tonic-gate * 197c478bd9Sstevel@tonic-gate * CDDL HEADER END 207c478bd9Sstevel@tonic-gate */ 21e8031f0aSraf 227c478bd9Sstevel@tonic-gate /* 237257d1b4Sraf * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 247c478bd9Sstevel@tonic-gate * Use is subject to license terms. 257c478bd9Sstevel@tonic-gate */ 267c478bd9Sstevel@tonic-gate 277c478bd9Sstevel@tonic-gate /* Copyright (c) 1988 AT&T */ 28*dd2ed563SToomas Soome /* All Rights Reserved */ 297c478bd9Sstevel@tonic-gate 307257d1b4Sraf #include "lint.h" 317c478bd9Sstevel@tonic-gate #include <sys/types.h> 327c478bd9Sstevel@tonic-gate #include <sys/stack.h> 337c478bd9Sstevel@tonic-gate #include <sys/frame.h> 347c478bd9Sstevel@tonic-gate #include <memory.h> 357c478bd9Sstevel@tonic-gate #include <ucontext.h> 367c478bd9Sstevel@tonic-gate #include <setjmp.h> 377c478bd9Sstevel@tonic-gate #include "sigjmp_struct.h" 387c478bd9Sstevel@tonic-gate #include "libc.h" 397c478bd9Sstevel@tonic-gate 40*dd2ed563SToomas Soome #pragma weak _siglongjmp = siglongjmp 41*dd2ed563SToomas Soome 427c478bd9Sstevel@tonic-gate void 43e8031f0aSraf siglongjmp(sigjmp_buf env, int val) 447c478bd9Sstevel@tonic-gate { 457c478bd9Sstevel@tonic-gate extern void _fetch_globals(greg_t *); 467c478bd9Sstevel@tonic-gate ucontext_t uc; 477c478bd9Sstevel@tonic-gate greg_t *reg = uc.uc_mcontext.gregs; 487c478bd9Sstevel@tonic-gate volatile sigjmp_struct_t *bp = (sigjmp_struct_t *)env; 497c478bd9Sstevel@tonic-gate greg_t fp = bp->sjs_fp; 507c478bd9Sstevel@tonic-gate greg_t i7 = bp->sjs_i7; 517c478bd9Sstevel@tonic-gate 527c478bd9Sstevel@tonic-gate /* 537c478bd9Sstevel@tonic-gate * Create a ucontext_t structure from scratch. 547c478bd9Sstevel@tonic-gate * We only need to fetch the globals. 557c478bd9Sstevel@tonic-gate * The outs are assumed to be trashed on return from sigsetjmp(). 567c478bd9Sstevel@tonic-gate * The ins and locals are restored from the resumed register window. 577c478bd9Sstevel@tonic-gate * The floating point state is unmodified. 587c478bd9Sstevel@tonic-gate * Everything else is in the sigjmp_struct_t buffer. 597c478bd9Sstevel@tonic-gate */ 607c478bd9Sstevel@tonic-gate (void) memset(&uc, 0, sizeof (uc)); 617c478bd9Sstevel@tonic-gate uc.uc_flags = UC_STACK | UC_CPU; 627c478bd9Sstevel@tonic-gate _fetch_globals(®[REG_G1]); 637c478bd9Sstevel@tonic-gate uc.uc_stack = bp->sjs_stack; 647c478bd9Sstevel@tonic-gate uc.uc_link = bp->sjs_uclink; 657c478bd9Sstevel@tonic-gate reg[REG_PC] = bp->sjs_pc; 667c478bd9Sstevel@tonic-gate reg[REG_nPC] = reg[REG_PC] + 0x4; 677c478bd9Sstevel@tonic-gate reg[REG_SP] = bp->sjs_sp; 687c478bd9Sstevel@tonic-gate 697c478bd9Sstevel@tonic-gate if (bp->sjs_flags & JB_SAVEMASK) { 707c478bd9Sstevel@tonic-gate uc.uc_flags |= UC_SIGMASK; 717c478bd9Sstevel@tonic-gate uc.uc_sigmask = bp->sjs_sigmask; 727c478bd9Sstevel@tonic-gate } 737c478bd9Sstevel@tonic-gate 747c478bd9Sstevel@tonic-gate if (val) 757c478bd9Sstevel@tonic-gate reg[REG_O0] = (greg_t)val; 767c478bd9Sstevel@tonic-gate else 777c478bd9Sstevel@tonic-gate reg[REG_O0] = (greg_t)1; 787c478bd9Sstevel@tonic-gate 797c478bd9Sstevel@tonic-gate /* 807c478bd9Sstevel@tonic-gate * Copy the fp and i7 values into the register window save area. 817c478bd9Sstevel@tonic-gate * These may have been clobbered between calls to sigsetjmp 827c478bd9Sstevel@tonic-gate * and siglongjmp. For example, the save area could have been 837c478bd9Sstevel@tonic-gate * relocated to lower addresses and the original save area 847c478bd9Sstevel@tonic-gate * given to an alloca() call. Notice that all reads from 857c478bd9Sstevel@tonic-gate * the sigjmp_struct_t buffer should take place before the 867c478bd9Sstevel@tonic-gate * following two writes. It is possible that user code may 877c478bd9Sstevel@tonic-gate * move/copy the sigjmpbuf around, and overlap the original 887c478bd9Sstevel@tonic-gate * register window save area. 897c478bd9Sstevel@tonic-gate */ 907c478bd9Sstevel@tonic-gate if (bp->sjs_sp != 0 && (bp->sjs_flags & JB_FRAMEPTR)) { 917c478bd9Sstevel@tonic-gate struct frame *sp = (struct frame *)(bp->sjs_sp + STACK_BIAS); 927c478bd9Sstevel@tonic-gate sp->fr_savfp = (struct frame *)fp; 937c478bd9Sstevel@tonic-gate sp->fr_savpc = i7; 947c478bd9Sstevel@tonic-gate } 957c478bd9Sstevel@tonic-gate 967c478bd9Sstevel@tonic-gate (void) setcontext(&uc); 977c478bd9Sstevel@tonic-gate } 98