1/*
2 * Copyright (c) 2000-2008 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/*
29 *	File: libkern/kernel_mach_header.h
30 *
31 *	Definitions for accessing mach-o headers.
32 *
33 * NOTE:	These functions work on Mach-O headers compatible with
34 *		the currently running kernel, and cannot be used against mach
35 *		headers other than that of the currently running kernel.
36 *
37 */
38
39#ifndef	_KERNEL_MACH_HEADER_
40#define	_KERNEL_MACH_HEADER_
41
42#ifdef __cplusplus
43extern "C" {
44#endif
45
46#include <mach/mach_types.h>
47#include <mach-o/loader.h>
48#include <mach-o/nlist.h>
49#include <mach-o/reloc.h>
50
51#if	!KERNEL
52#error this header for kernel use only
53#endif
54
55#if defined(__LP64__)
56
57typedef struct mach_header_64	kernel_mach_header_t;
58typedef struct segment_command_64 kernel_segment_command_t;
59typedef struct section_64		kernel_section_t;
60typedef struct nlist_64         kernel_nlist_t;
61
62#define MH_MAGIC_KERNEL         MH_MAGIC_64
63#define LC_SEGMENT_KERNEL       LC_SEGMENT_64
64
65#else
66
67typedef struct mach_header		kernel_mach_header_t;
68typedef struct segment_command	kernel_segment_command_t;
69typedef struct section			kernel_section_t;
70typedef struct nlist            kernel_nlist_t;
71
72#define MH_MAGIC_KERNEL         MH_MAGIC
73#define LC_SEGMENT_KERNEL		LC_SEGMENT
74#define SECT_CONSTRUCTOR		"__constructor"
75#define SECT_DESTRUCTOR			"__destructor"
76
77#endif
78
79#define SECT_MODINITFUNC		"__mod_init_func"
80#define SECT_MODTERMFUNC		"__mod_term_func"
81
82extern kernel_mach_header_t _mh_execute_header;
83
84vm_offset_t getlastaddr(void);
85
86kernel_segment_command_t *firstseg(void);
87kernel_segment_command_t *firstsegfromheader(kernel_mach_header_t *header);
88kernel_segment_command_t *nextsegfromheader(
89	kernel_mach_header_t	*header,
90	kernel_segment_command_t	*seg);
91kernel_segment_command_t *getsegbyname(const char *seg_name);
92kernel_segment_command_t *getsegbynamefromheader(
93	kernel_mach_header_t	*header,
94	const char		*seg_name);
95void *getsegdatafromheader(kernel_mach_header_t *, const char *, unsigned long *);
96kernel_section_t *getsectbyname(const char *seg_name, const char *sect_name);
97kernel_section_t *getsectbynamefromheader(
98	kernel_mach_header_t	*header,
99	const char		*seg_name,
100	const char		*sect_name);
101void *getsectdatafromheader(kernel_mach_header_t *, const char *, const char *, unsigned long *);
102kernel_section_t *firstsect(kernel_segment_command_t *sgp);
103kernel_section_t *nextsect(kernel_segment_command_t *sgp, kernel_section_t *sp);
104void *getcommandfromheader(kernel_mach_header_t *, uint32_t);
105void *getuuidfromheader(kernel_mach_header_t *, unsigned long *);
106
107#ifdef __cplusplus
108}
109#endif
110
111#endif	/* _KERNEL_MACH_HEADER_ */
112