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 <sys/param.h> 31 #include <stddef.h> 32 #include <stdlib.h> 33 #include <string.h> 34 #include <unistd.h> 35 #include "rtld.h" 36 #include "rtld_printf.h" 37 #include "rtld_malloc.h" 38 #include "rtld_libc.h" 39 40 void * 41 xcalloc(size_t number, size_t size) 42 { 43 void *p; 44 45 p = __crt_calloc(number, size); 46 if (p == NULL) { 47 rtld_fdputstr(STDERR_FILENO, "Out of memory\n"); 48 _exit(1); 49 } 50 return (p); 51 } 52 53 void * 54 xmalloc(size_t size) 55 { 56 57 void *p; 58 59 p = __crt_malloc(size); 60 if (p == NULL) { 61 rtld_fdputstr(STDERR_FILENO, "Out of memory\n"); 62 _exit(1); 63 } 64 return (p); 65 } 66 67 char * 68 xstrdup(const char *str) 69 { 70 char *copy; 71 size_t len; 72 73 len = strlen(str) + 1; 74 copy = xmalloc(len); 75 memcpy(copy, str, len); 76 return (copy); 77 } 78 79 void * 80 malloc_aligned(size_t size, size_t align, size_t offset) 81 { 82 char *mem, *res; 83 uintptr_t x; 84 85 offset &= align - 1; 86 if (align < sizeof(void *)) 87 align = sizeof(void *); 88 89 mem = xmalloc(size + 3 * align + offset); 90 x = roundup((uintptr_t)mem + sizeof(void *), align); 91 x += offset; 92 res = (void *)x; 93 x -= sizeof(void *); 94 memcpy((void *)x, &mem, sizeof(mem)); 95 return (res); 96 } 97 98 void 99 free_aligned(void *ptr) 100 { 101 void *mem; 102 uintptr_t x; 103 104 if (ptr == NULL) 105 return; 106 x = (uintptr_t)ptr; 107 x -= sizeof(void *); 108 memcpy(&mem, (void *)x, sizeof(mem)); 109 free(mem); 110 } 111