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/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2017 Michal Meloun <mmel@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#include <sys/types.h>
#include <sys/ucontext.h>
#include <errno.h>
#include <stdlib.h>
#include <machine/sysarch.h>
struct ucontextx {
ucontext_t ucontext;
mcontext_vfp_t mcontext_vfp;
};
int
__getcontextx_size(void)
{
return (sizeof(struct ucontextx));
}
int
__fillcontextx2(char *ctx)
{
struct ucontextx *ucxp;
ucontext_t *ucp;
mcontext_vfp_t *mvp;
struct arm_get_vfpstate_args vfp_arg;
ucxp = (struct ucontextx *)ctx;
ucp = &ucxp->ucontext;
mvp = &ucxp->mcontext_vfp;
vfp_arg.mc_vfp_size = sizeof(mcontext_vfp_t);
vfp_arg.mc_vfp = mvp;
if (sysarch(ARM_GET_VFPSTATE, &vfp_arg) == -1)
return (-1);
ucp->uc_mcontext.mc_vfp_size = sizeof(mcontext_vfp_t);
ucp->uc_mcontext.mc_vfp_ptr = mvp;
return (0);
}
int
__fillcontextx(char *ctx)
{
struct ucontextx *ucxp;
ucxp = (struct ucontextx *)ctx;
if (getcontext(&ucxp->ucontext) == -1)
return (-1);
__fillcontextx2(ctx);
return (0);
}
__weak_reference(__getcontextx, getcontextx);
ucontext_t *
__getcontextx(void)
{
char *ctx;
int error;
ctx = malloc(__getcontextx_size());
if (ctx == NULL)
return (NULL);
if (__fillcontextx(ctx) == -1) {
error = errno;
free(ctx);
errno = error;
return (NULL);
}
return ((ucontext_t *)ctx);
}
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