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	1	/*
	2	* Copyright (c) 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	#ifndef _KXLD_STATE_H_
	29	#define _KXLD_STATE_H_
	30
	31	#include <sys/types.h>
	32	#if KERNEL
	33	#include <libkern/kxld_types.h>
	34	#else
	35	#include "kxld_types.h"
	36	#endif
	37
	38	#include "kxld_array.h"
	39	#include "kxld_util.h"
	40
	41	struct kxld_dict;
	42	struct kxld_kext;
	43	struct kxld_link_state_hdr;
	44	typedef struct kxld_state KXLDState;
	45	typedef struct kxld_link_state_hdr KXLDLinkStateHdr;
	46	typedef struct kxld_vtable_hdr KXLDVTableHdr;
	47	typedef struct kxld_sym_entry_32 KXLDSymEntry32;
	48	typedef struct kxld_sym_entry_64 KXLDSymEntry64;
	49
	50	struct kxld_state {
	51	u_char *file;
	52	KXLDArray vtables;
	53	boolean_t swap;
	54	};
	55
	56	/*
	57	* The format of the link state object is as follows:
	58
	59	* Field *** Type *
	60	**************************************************
	61	* Link state header *** KXLDLinkStateHdr *
	62	**************************************************
	63	* Section order entries *** KXLDSectionName *
	64	**************************************************
	65	* Vtable headers *** KXLDVTableHdr *
	66	**************************************************
	67	* VTables *** KXLDSymEntry[32\|64] *
	68	**************************************************
	69	* Exported symbols *** KXLDSymEntry[32\|64] *
	70	**************************************************
	71	* String table *** char[] *
	72	**************************************************
	73
	74	*/
	75
	76	struct kxld_link_state_hdr {
	77	uint32_t magic;
	78	uint32_t version;
	79	cpu_type_t cputype;
	80	cpu_subtype_t cpusubtype;
	81	uint32_t nsects;
	82	uint32_t sectoff;
	83	uint32_t nvtables;
	84	uint32_t voff;
	85	uint32_t nsyms;
	86	uint32_t symoff;
	87	};
	88
	89	struct kxld_vtable_hdr {
	90	uint32_t nameoff;
	91	uint32_t vtableoff;
	92	uint32_t nentries;
	93	};
	94
	95	struct kxld_sym_entry_32 {
	96	uint32_t addr;
	97	uint32_t nameoff;
	98	uint32_t flags;
	99	};
	100
	101	struct kxld_sym_entry_64 {
	102	uint64_t addr;
	103	uint32_t nameoff;
	104	uint32_t flags;
	105	} __attribute__((aligned(16)));
	106
	107	#define KXLD_SYM_OBSOLETE 0x1
	108
	109	/*******************************************************************************
	110	* Constructors and destructors
	111	*******************************************************************************/
	112
	113	kern_return_t kxld_state_init_from_file(KXLDState state, u_char file,
	114	KXLDArray *section_order)
	115	__attribute__((nonnull(1,2), visibility("hidden")));
	116
	117	void kxld_state_clear(KXLDState *state)
	118	__attribute__((nonnull, visibility("hidden")));
	119
	120	void kxld_state_deinit(KXLDState *state)
	121	__attribute__((nonnull, visibility("hidden")));
	122
	123	/*******************************************************************************
	124	* Accessors
	125	*******************************************************************************/
	126
	127	u_int kxld_state_get_num_symbols(KXLDState *state)
	128	__attribute__((pure, nonnull, visibility("hidden")));
	129
	130	kern_return_t kxld_state_get_symbols(KXLDState *state,
	131	struct kxld_dict *defined_symbols,
	132	struct kxld_dict *obsolete_symbols)
	133	__attribute__((nonnull, visibility("hidden")));
	134
	135	u_int kxld_state_get_num_vtables(KXLDState *state)
	136	__attribute__((pure, nonnull, visibility("hidden")));
	137
	138	kern_return_t kxld_state_get_vtables(KXLDState *state,
	139	struct kxld_dict *patched_vtables)
	140	__attribute__((nonnull, visibility("hidden")));
	141
	142	void kxld_state_get_cputype(const KXLDState *state,
	143	cpu_type_t cputype, cpu_subtype_t cpusubtype)
	144	__attribute__((nonnull, visibility("hidden")));
	145
	146	/*******************************************************************************
	147	* Exporters
	148	*******************************************************************************/
	149
	150	kern_return_t kxld_state_export_kext_to_file(struct kxld_kext kext, u_char *file,
	151	u_long filesize, struct kxld_dict tmpdict, KXLDArray *tmps)
	152	__attribute__((nonnull, visibility("hidden")));
	153
	154	#endif /* _KXLD_STATE_H_ */
	155