1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2017 Michal Meloun <mmel@FreeBSD.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 #include <sys/types.h> 31 #include <sys/ucontext.h> 32 #include <errno.h> 33 #include <stdlib.h> 34 #include <machine/sysarch.h> 35 36 struct ucontextx { 37 ucontext_t ucontext; 38 mcontext_vfp_t mcontext_vfp; 39 }; 40 41 int 42 __getcontextx_size(void) 43 { 44 45 return (sizeof(struct ucontextx)); 46 } 47 48 int 49 __fillcontextx2(char *ctx) 50 { 51 struct ucontextx *ucxp; 52 ucontext_t *ucp; 53 mcontext_vfp_t *mvp; 54 struct arm_get_vfpstate_args vfp_arg; 55 56 ucxp = (struct ucontextx *)ctx; 57 ucp = &ucxp->ucontext; 58 mvp = &ucxp->mcontext_vfp; 59 60 vfp_arg.mc_vfp_size = sizeof(mcontext_vfp_t); 61 vfp_arg.mc_vfp = mvp; 62 if (sysarch(ARM_GET_VFPSTATE, &vfp_arg) == -1) 63 return (-1); 64 ucp->uc_mcontext.mc_vfp_size = sizeof(mcontext_vfp_t); 65 ucp->uc_mcontext.mc_vfp_ptr = mvp; 66 return (0); 67 } 68 69 int 70 __fillcontextx(char *ctx) 71 { 72 struct ucontextx *ucxp; 73 74 ucxp = (struct ucontextx *)ctx; 75 if (getcontext(&ucxp->ucontext) == -1) 76 return (-1); 77 __fillcontextx2(ctx); 78 return (0); 79 } 80 81 __weak_reference(__getcontextx, getcontextx); 82 83 ucontext_t * 84 __getcontextx(void) 85 { 86 char *ctx; 87 int error; 88 89 ctx = malloc(__getcontextx_size()); 90 if (ctx == NULL) 91 return (NULL); 92 if (__fillcontextx(ctx) == -1) { 93 error = errno; 94 free(ctx); 95 errno = error; 96 return (NULL); 97 } 98 return ((ucontext_t *)ctx); 99 } 100