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Commit	Line	Data
	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_VTABLE_H_
	29	#define _KXLD_VTABLE_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
	40	struct kxld_array;
	41	struct kxld_object;
	42	struct kxld_reloc;
	43	struct kxld_relocator;
	44	struct kxld_sect;
	45	struct kxld_sym;
	46	struct kxld_symtab;
	47	struct kxld_vtable_hdr;
	48	struct section;
	49
	50	typedef struct kxld_vtable KXLDVTable;
	51	typedef union kxld_vtable_entry KXLDVTableEntry;
	52
	53	struct kxld_vtable {
	54	u_char *vtable;
	55	const char *name;
	56	KXLDArray entries;
	57	boolean_t is_patched;
	58	};
	59
	60	struct kxld_vtable_patched_entry {
	61	char *name;
	62	kxld_addr_t addr;
	63	};
	64
	65	struct kxld_vtable_unpatched_entry {
	66	const struct kxld_sym *sym;
	67	struct kxld_reloc *reloc;
	68	};
	69
	70	union kxld_vtable_entry {
	71	struct kxld_vtable_patched_entry patched;
	72	struct kxld_vtable_unpatched_entry unpatched;
	73	};
	74
	75	/*******************************************************************************
	76	* Constructors and destructors
	77	*******************************************************************************/
	78
	79	kern_return_t kxld_vtable_init(KXLDVTable *vtable,
	80	const struct kxld_sym vtable_sym, const struct kxld_object object,
	81	const struct kxld_dict *defined_cxx_symbols)
	82	__attribute__((nonnull, visibility("hidden")));
	83
	84	void kxld_vtable_clear(KXLDVTable *vtable)
	85	__attribute__((visibility("hidden")));
	86
	87	void kxld_vtable_deinit(KXLDVTable *vtable)
	88	__attribute__((visibility("hidden")));
	89
	90	/*******************************************************************************
	91	* Accessors
	92	*******************************************************************************/
	93
	94	KXLDVTableEntry * kxld_vtable_get_entry_for_offset(const KXLDVTable *vtable,
	95	u_long offset, boolean_t is_32_bit)
	96	__attribute__((pure,nonnull,visibility("hidden")));
	97
	98	/*******************************************************************************
	99	* Modifiers
	100	*******************************************************************************/
	101
	102	/* With strict patching, the vtable patcher with only patch pad slots */
	103	kern_return_t kxld_vtable_patch(KXLDVTable vtable, const KXLDVTable super_vtable,
	104	struct kxld_object *object)
	105	__attribute__((nonnull, visibility("hidden")));
	106
	107	#endif /* _KXLD_VTABLE_H_ */
	108