1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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 28 #include <sys/param.h> 29 #include <stddef.h> 30 #include <stdlib.h> 31 #include <string.h> 32 #include <unistd.h> 33 #include "rtld.h" 34 #include "rtld_printf.h" 35 #include "rtld_malloc.h" 36 #include "rtld_libc.h" 37 38 void * 39 xcalloc(size_t number, size_t size) 40 { 41 void *p; 42 43 p = __crt_calloc(number, size); 44 if (p == NULL) { 45 rtld_fdputstr(STDERR_FILENO, "Out of memory\n"); 46 _exit(1); 47 } 48 return (p); 49 } 50 51 void * 52 xmalloc(size_t size) 53 { 54 55 void *p; 56 57 p = __crt_malloc(size); 58 if (p == NULL) { 59 rtld_fdputstr(STDERR_FILENO, "Out of memory\n"); 60 _exit(1); 61 } 62 return (p); 63 } 64 65 char * 66 xstrdup(const char *str) 67 { 68 char *copy; 69 size_t len; 70 71 len = strlen(str) + 1; 72 copy = xmalloc(len); 73 memcpy(copy, str, len); 74 return (copy); 75 } 76 77 void * 78 malloc_aligned(size_t size, size_t align, size_t offset) 79 { 80 char *mem, *res; 81 uintptr_t x; 82 83 offset &= align - 1; 84 if (align < sizeof(void *)) 85 align = sizeof(void *); 86 87 mem = xmalloc(size + 3 * align + offset); 88 x = roundup((uintptr_t)mem + sizeof(void *), align); 89 x += offset; 90 res = (void *)x; 91 x -= sizeof(void *); 92 memcpy((void *)x, &mem, sizeof(mem)); 93 return (res); 94 } 95 96 void 97 free_aligned(void *ptr) 98 { 99 void *mem; 100 uintptr_t x; 101 102 if (ptr == NULL) 103 return; 104 x = (uintptr_t)ptr; 105 x -= sizeof(void *); 106 memcpy(&mem, (void *)x, sizeof(mem)); 107 free(mem); 108 } 109