common/m9x/fex_handler.c

	fex_handler.c revision 25c28e83beb90e7c80452a7c818c5e6f73a07dc8
/*
 * 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 2011 Nexenta Systems, Inc.  All rights reserved.
 */
/*
 * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#pragma weak fex_get_handling = __fex_get_handling
#pragma weak fex_set_handling = __fex_set_handling
#pragma weak fex_getexcepthandler = __fex_getexcepthandler
#pragma weak fex_setexcepthandler = __fex_setexcepthandler

#include "fenv_synonyms.h"
#include <fenv.h>
#include <ucontext.h>
#include <thread.h>
#include "fex_handler.h"

int fex_get_handling(int e)
{
    struct fex_handler_data *thr_handlers;
    int                     i;

    thr_handlers = __fex_get_thr_handlers();
    for (i = 0; i < FEX_NUM_EXC; i++)
        if (e & (1 << i))
            return thr_handlers[i].__mode;
    return FEX_NOHANDLER;
}

int fex_set_handling(int e, int mode, void (*handler)())
{
    struct fex_handler_data *thr_handlers;
    int                     i;

    if (e & ~((1 << FEX_NUM_EXC) - 1))
        return 0;
    thr_handlers = __fex_get_thr_handlers();
    for (i = 0; i < FEX_NUM_EXC; i++) {
        if (e & (1 << i)) {
            thr_handlers[i].__mode = mode;
            thr_handlers[i].__handler = handler;
        }
    }
    __fex_update_te();
    return 1;
}

void fex_getexcepthandler(fex_handler_t *buf, int e)
{
    struct fex_handler_data *thr_handlers;
    int                     i;

    thr_handlers = __fex_get_thr_handlers();
    for (i = 0; i < FEX_NUM_EXC; i++)
        if (e & (1 << i))
            (*buf)[i] = thr_handlers[i];
}

void fex_setexcepthandler(const fex_handler_t *buf, int e)
{
    struct fex_handler_data *thr_handlers;
    int                     i;

    thr_handlers = __fex_get_thr_handlers();
    for (i = 0; i < FEX_NUM_EXC; i++)
        if (e & (1 << i))
            thr_handlers[i] = (*buf)[i];
    __fex_update_te();
}