libkern/kxld/kxld_srcversion.c

   1 /*
   2  * Copyright (c) 2011 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 #include <string.h>
  29 #include <mach-o/loader.h>
  30 #include <sys/types.h>
  31
  32 #define DEBUG_ASSERT_COMPONENT_NAME_STRING "kxld"
  33 #include <AssertMacros.h>
  34
  35 #include "kxld_util.h"
  36 #include "kxld_srcversion.h"
  37
  38 /*******************************************************************************
  39  *******************************************************************************/
  40 void
  41 kxld_srcversion_init_from_macho(KXLDsrcversion *srcversion, struct source_version_command *src)
  42 {
  43     check(srcversion);
  44     check(src);
  45
  46     srcversion->version = src->version;
  47     srcversion->has_srcversion = TRUE;
  48 }
  49
  50 /*******************************************************************************
  51  *******************************************************************************/
  52 void
  53 kxld_srcversion_clear(KXLDsrcversion *srcversion)
  54 {
  55     bzero(srcversion, sizeof(*srcversion));
  56 }
  57
  58 /*******************************************************************************
  59  *******************************************************************************/
  60 u_long
  61 kxld_srcversion_get_macho_header_size(void)
  62 {
  63     return sizeof(struct source_version_command);
  64 }
  65
  66 /*******************************************************************************
  67  *******************************************************************************/
  68 kern_return_t
  69 kxld_srcversion_export_macho(const KXLDsrcversion *srcversion, u_char *buf,
  70                        u_long *header_offset, u_long header_size)
  71 {
  72     kern_return_t rval = KERN_FAILURE;
  73     struct source_version_command *srcversionhdr = NULL;
  74
  75     check(srcversion);
  76     check(buf);
  77     check(header_offset);
  78
  79     require_action(sizeof(*srcversionhdr) <= header_size - *header_offset, finish,
  80                    rval=KERN_FAILURE);
  81     srcversionhdr = (struct source_version_command *) ((void *) (buf + *header_offset));
  82     *header_offset += sizeof(*srcversionhdr);
  83
  84     srcversionhdr->cmd = LC_SOURCE_VERSION;
  85     srcversionhdr->cmdsize = (uint32_t) sizeof(*srcversionhdr);
  86     srcversionhdr->version = srcversion->version;
  87
  88     rval = KERN_SUCCESS;
  89
  90 finish:
  91     return rval;
  92 }
  93