1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright 1996-1998 John D. Polstra. 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 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * 27 * $FreeBSD$ 28 */ 29 30 #include <stddef.h> 31 #include <stdlib.h> 32 #include <string.h> 33 #include <unistd.h> 34 #include "rtld.h" 35 #include "rtld_printf.h" 36 37 void * 38 xcalloc(size_t number, size_t size) 39 { 40 void *p; 41 42 p = calloc(number, size); 43 if (p == NULL) { 44 rtld_fdputstr(STDERR_FILENO, "Out of memory\n"); 45 _exit(1); 46 } 47 return (p); 48 } 49 50 void * 51 xmalloc(size_t size) 52 { 53 void *p = malloc(size); 54 if (p == NULL) { 55 rtld_fdputstr(STDERR_FILENO, "Out of memory\n"); 56 _exit(1); 57 } 58 return p; 59 } 60 61 char * 62 xstrdup(const char *str) 63 { 64 char *copy; 65 size_t len; 66 67 len = strlen(str) + 1; 68 copy = xmalloc(len); 69 memcpy(copy, str, len); 70 return (copy); 71 } 72 73 void * 74 malloc_aligned(size_t size, size_t align) 75 { 76 void *mem, *res; 77 78 if (align < sizeof(void *)) 79 align = sizeof(void *); 80 81 mem = xmalloc(size + sizeof(void *) + align - 1); 82 res = (void *)round((uintptr_t)mem + sizeof(void *), align); 83 *(void **)((uintptr_t)res - sizeof(void *)) = mem; 84 return (res); 85 } 86 87 void 88 free_aligned(void *ptr) 89 { 90 void *mem; 91 uintptr_t x; 92 93 if (ptr == NULL) 94 return; 95 x = (uintptr_t)ptr; 96 x -= sizeof(void *); 97 mem = *(void **)x; 98 free(mem); 99 } 100