libkern/kxld/kxld_versionmin.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_versionmin.h"
  37
  38 /*******************************************************************************
  39 *******************************************************************************/
  40 void
  41 kxld_versionmin_init_from_macho(KXLDversionmin *versionmin, struct version_min_command *src)
  42 {
  43         check(versionmin);
  44         check(src);
  45         check((src->cmd == LC_VERSION_MIN_MACOSX) || (src->cmd == LC_VERSION_MIN_IPHONEOS) || (src->cmd == LC_VERSION_MIN_TVOS) || (src->cmd == LC_VERSION_MIN_WATCHOS));
  46
  47         switch (src->cmd) {
  48         case LC_VERSION_MIN_MACOSX:
  49                 versionmin->platform = kKxldVersionMinMacOSX;
  50                 break;
  51         case LC_VERSION_MIN_IPHONEOS:
  52                 versionmin->platform = kKxldVersionMiniPhoneOS;
  53                 break;
  54         case LC_VERSION_MIN_TVOS:
  55                 versionmin->platform = kKxldVersionMinAppleTVOS;
  56                 break;
  57         case LC_VERSION_MIN_WATCHOS:
  58                 versionmin->platform = kKxldVersionMinWatchOS;
  59                 break;
  60         }
  61
  62         versionmin->version = src->version;
  63         versionmin->has_versionmin = TRUE;
  64 }
  65
  66 void
  67 kxld_versionmin_init_from_build_cmd(KXLDversionmin *versionmin, struct build_version_command *src)
  68 {
  69         check(versionmin);
  70         check(src);
  71         switch (src->platform) {
  72         case PLATFORM_MACOS:
  73                 versionmin->platform = kKxldVersionMinMacOSX;
  74                 break;
  75         case PLATFORM_IOS:
  76                 versionmin->platform = kKxldVersionMiniPhoneOS;
  77                 break;
  78         case PLATFORM_TVOS:
  79                 versionmin->platform = kKxldVersionMinAppleTVOS;
  80                 break;
  81         case PLATFORM_WATCHOS:
  82                 versionmin->platform = kKxldVersionMinWatchOS;
  83                 break;
  84         default:
  85                 return;
  86         }
  87         versionmin->version = src->minos;
  88         versionmin->has_versionmin = TRUE;
  89 }
  90
  91 /*******************************************************************************
  92 *******************************************************************************/
  93 void
  94 kxld_versionmin_clear(KXLDversionmin *versionmin)
  95 {
  96         bzero(versionmin, sizeof(*versionmin));
  97 }
  98
  99 /*******************************************************************************
 100 *******************************************************************************/
 101 u_long
 102 kxld_versionmin_get_macho_header_size(__unused const KXLDversionmin *versionmin)
 103 {
 104         /* TODO: eventually we can just use struct build_version_command */
 105         return sizeof(struct version_min_command);
 106 }
 107
 108 /*******************************************************************************
 109 *******************************************************************************/
 110 kern_return_t
 111 kxld_versionmin_export_macho(const KXLDversionmin *versionmin, u_char *buf,
 112     u_long *header_offset, u_long header_size)
 113 {
 114         kern_return_t rval = KERN_FAILURE;
 115         struct version_min_command *versionminhdr = NULL;
 116
 117         check(versionmin);
 118         check(buf);
 119         check(header_offset);
 120
 121
 122         require_action(sizeof(*versionminhdr) <= header_size - *header_offset, finish,
 123             rval = KERN_FAILURE);
 124         versionminhdr = (struct version_min_command *) ((void *) (buf + *header_offset));
 125         bzero(versionminhdr, sizeof(*versionminhdr));
 126         *header_offset += sizeof(*versionminhdr);
 127
 128         switch (versionmin->platform) {
 129         case kKxldVersionMinMacOSX:
 130                 versionminhdr->cmd = LC_VERSION_MIN_MACOSX;
 131                 break;
 132         case kKxldVersionMiniPhoneOS:
 133                 versionminhdr->cmd = LC_VERSION_MIN_IPHONEOS;
 134                 break;
 135         case kKxldVersionMinAppleTVOS:
 136                 versionminhdr->cmd = LC_VERSION_MIN_TVOS;
 137                 break;
 138         case kKxldVersionMinWatchOS:
 139                 versionminhdr->cmd = LC_VERSION_MIN_WATCHOS;
 140                 break;
 141         default:
 142                 goto finish;
 143         }
 144         versionminhdr->cmdsize = (uint32_t) sizeof(*versionminhdr);
 145         versionminhdr->version = versionmin->version;
 146         versionminhdr->sdk = 0;
 147
 148         rval = KERN_SUCCESS;
 149
 150 finish:
 151         return rval;
 152 }