/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright 2008 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ /* Copyright (c) 1988 AT&T */ /* All Rights Reserved */ #pragma ident "%Z%%M% %I% %E% SMI" #pragma weak _siglongjmp = siglongjmp #include "lint.h" #include <sys/types.h> #include <sys/stack.h> #include <sys/frame.h> #include <memory.h> #include <ucontext.h> #include <setjmp.h> #include "sigjmp_struct.h" #include "libc.h" void siglongjmp(sigjmp_buf env, int val) { extern void _fetch_globals(greg_t *); ucontext_t uc; greg_t *reg = uc.uc_mcontext.gregs; volatile sigjmp_struct_t *bp = (sigjmp_struct_t *)env; greg_t fp = bp->sjs_fp; greg_t i7 = bp->sjs_i7; /* * Create a ucontext_t structure from scratch. * We only need to fetch the globals. * The outs are assumed to be trashed on return from sigsetjmp(). * The ins and locals are restored from the resumed register window. * The floating point state is unmodified. * Everything else is in the sigjmp_struct_t buffer. */ (void) memset(&uc, 0, sizeof (uc)); uc.uc_flags = UC_STACK | UC_CPU; _fetch_globals(®[REG_G1]); uc.uc_stack = bp->sjs_stack; uc.uc_link = bp->sjs_uclink; reg[REG_PC] = bp->sjs_pc; reg[REG_nPC] = reg[REG_PC] + 0x4; reg[REG_SP] = bp->sjs_sp; if (bp->sjs_flags & JB_SAVEMASK) { uc.uc_flags |= UC_SIGMASK; uc.uc_sigmask = bp->sjs_sigmask; } if (val) reg[REG_O0] = (greg_t)val; else reg[REG_O0] = (greg_t)1; /* * Copy the fp and i7 values into the register window save area. * These may have been clobbered between calls to sigsetjmp * and siglongjmp. For example, the save area could have been * relocated to lower addresses and the original save area * given to an alloca() call. Notice that all reads from * the sigjmp_struct_t buffer should take place before the * following two writes. It is possible that user code may * move/copy the sigjmpbuf around, and overlap the original * register window save area. */ if (bp->sjs_sp != 0 && (bp->sjs_flags & JB_FRAMEPTR)) { struct frame *sp = (struct frame *)(bp->sjs_sp + STACK_BIAS); sp->fr_savfp = (struct frame *)fp; sp->fr_savpc = i7; } (void) setcontext(&uc); }