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/types.h> 30 #include <sys/ucontext.h> 31 #include <errno.h> 32 #include <stdlib.h> 33 #include <machine/sysarch.h> 34 35 struct ucontextx { 36 ucontext_t ucontext; 37 mcontext_vfp_t mcontext_vfp; 38 }; 39 40 int 41 __getcontextx_size(void) 42 { 43 44 return (sizeof(struct ucontextx)); 45 } 46 47 int 48 __fillcontextx2(char *ctx) 49 { 50 struct ucontextx *ucxp; 51 ucontext_t *ucp; 52 mcontext_vfp_t *mvp; 53 struct arm_get_vfpstate_args vfp_arg; 54 55 ucxp = (struct ucontextx *)ctx; 56 ucp = &ucxp->ucontext; 57 mvp = &ucxp->mcontext_vfp; 58 59 vfp_arg.mc_vfp_size = sizeof(mcontext_vfp_t); 60 vfp_arg.mc_vfp = mvp; 61 if (sysarch(ARM_GET_VFPSTATE, &vfp_arg) == -1) 62 return (-1); 63 ucp->uc_mcontext.mc_vfp_size = sizeof(mcontext_vfp_t); 64 ucp->uc_mcontext.mc_vfp_ptr = mvp; 65 return (0); 66 } 67 68 int 69 __fillcontextx(char *ctx) 70 { 71 struct ucontextx *ucxp; 72 73 ucxp = (struct ucontextx *)ctx; 74 if (getcontext(&ucxp->ucontext) == -1) 75 return (-1); 76 __fillcontextx2(ctx); 77 return (0); 78 } 79 80 __weak_reference(__getcontextx, getcontextx); 81 82 ucontext_t * 83 __getcontextx(void) 84 { 85 char *ctx; 86 int error; 87 88 ctx = malloc(__getcontextx_size()); 89 if (ctx == NULL) 90 return (NULL); 91 if (__fillcontextx(ctx) == -1) { 92 error = errno; 93 free(ctx); 94 errno = error; 95 return (NULL); 96 } 97 return ((ucontext_t *)ctx); 98 } 99