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/*
* 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 (c) 1992, 2010, Oracle and/or its affiliates. All rights reserved.
*/
/* Copyright (c) 1988 AT&T */
/* All Rights Reserved */
#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"
#pragma weak _siglongjmp = siglongjmp
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;
reg[REG_ASI] = bp->sjs_asi;
reg[REG_FPRS] = bp->sjs_fprs;
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);
}
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