1 /* 2 * Copyright (c) 2011 Konstantin Belousov <kib@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 #include <sys/types.h> 29 #include <sys/ucontext.h> 30 #include <errno.h> 31 #include <stdlib.h> 32 33 int 34 __getcontextx_size(void) 35 { 36 37 return (sizeof(ucontext_t)); 38 } 39 40 int 41 __fillcontextx2(char *ctx) 42 { 43 44 return (0); 45 } 46 47 int 48 __fillcontextx(char *ctx) 49 { 50 ucontext_t *ucp; 51 52 ucp = (ucontext_t *)ctx; 53 return (getcontext(ucp)); 54 } 55 56 __weak_reference(__getcontextx, getcontextx); 57 58 ucontext_t * 59 __getcontextx(void) 60 { 61 char *ctx; 62 int error; 63 64 ctx = malloc(__getcontextx_size()); 65 if (ctx == NULL) 66 return (NULL); 67 if (__fillcontextx(ctx) == -1) { 68 error = errno; 69 free(ctx); 70 errno = error; 71 return (NULL); 72 } 73 return ((ucontext_t *)ctx); 74 } 75