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/types.h> 28 #include <sys/ucontext.h> 29 #include <errno.h> 30 #include <stdlib.h> 31 32 int 33 __getcontextx_size(void) 34 { 35 36 return (sizeof(ucontext_t)); 37 } 38 39 int 40 __fillcontextx2(char *ctx) 41 { 42 43 return (0); 44 } 45 46 int 47 __fillcontextx(char *ctx) 48 { 49 ucontext_t *ucp; 50 51 ucp = (ucontext_t *)ctx; 52 return (getcontext(ucp)); 53 } 54 55 __weak_reference(__getcontextx, getcontextx); 56 57 ucontext_t * 58 __getcontextx(void) 59 { 60 char *ctx; 61 int error; 62 63 ctx = malloc(__getcontextx_size()); 64 if (ctx == NULL) 65 return (NULL); 66 if (__fillcontextx(ctx) == -1) { 67 error = errno; 68 free(ctx); 69 errno = error; 70 return (NULL); 71 } 72 return ((ucontext_t *)ctx); 73 } 74