[apple/xnu.git] / libkern / kxld / kxld_util.h

/*
 * Copyright (c) 2007-2008 Apple Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 * 
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */
#ifndef _KXLD_UTIL_H_
#define _KXLD_UTIL_H_

#include <sys/types.h>
#if KERNEL
    #include <libkern/kxld_types.h>
    #include <mach/machine.h>
#else
    #include <architecture/byte_order.h>
    #include "kxld_types.h"

    /* Get machine.h from the kernel source so we can support all platforms
     * that the kernel supports. Otherwise we're at the mercy of the host.
     */
    #include "../../osfmk/mach/machine.h"
#endif

/* 64-bit helpers */
#if !defined(KERNEL)

    #define KXLD_3264_FUNC(cond32, rval, func32, func64, ...) \
    do {                        \
        if (cond32) {           \
            (rval) = (func32)(__VA_ARGS__); \
        } else {                \
            (rval) = (func64)(__VA_ARGS__); \
        }                       \
    } while(0)

#elif defined(__LP64__)

    #define KXLD_3264_FUNC(cond32, rval, func32, func64, ...) \
    do {                        \
        (rval) = (func64)(__VA_ARGS__);     \
    } while(0)                 

#else

    #define KXLD_3264_FUNC(cond32, rval, func32, func64, ...) \
    do {                        \
        (rval) = (func32)(__VA_ARGS__);     \
    } while(0)                  \

#endif 

/* Misc string functions */
#define streq(str1, str2) (((str1) && (str2)) ? !strcmp((str1), (str2)) : 0)
#define streq_safe(str1, str2, len) (((str1) && (str2)) ? \
    !strncmp((str1), (str2), (len)) : 0)
#define const_strlen(str) (sizeof(str) - 1)

#define const_array_len(array) sizeof(array) / sizeof(*array)

/* Timing */
#define DECL_TIMER()   struct timeval start, end;
#define START_TIMER()  gettimeofday(&start, NULL);
#define END_TIMER()    gettimeofday(&end, NULL);
#define PRINT_TIMER(msg)  kxld_log("%s: %ds, %dus\n", (msg), \
        (end.tv_sec - start.tv_sec), (end.tv_usec - start.tv_usec));

/* Misc definitions */
#define KXLD_MAX_NAME_LEN                       256
#define KXLD_SEG_GOT                            "__DATA"
#define KXLD_SECT_GOT                           "__kxld_got"
#define KXLD_KMOD_INFO_SYMBOL                   "_kmod_info"
#define KXLD_WEAK_TEST_SYMBOL                   "_gOSKextUnresolved"
#define KXLD_OPERATOR_NEW_SYMBOL                "__Znwm"
#define KXLD_OPERATOR_NEW_ARRAY_SYMBOL          "__Znam"
#define KXLD_OPERATOR_DELETE_SYMBOL             "__ZdlPv"
#define KXLD_OPERATOR_DELETE_ARRAY_SYMBOL       "__ZdaPv"

struct kxld_section_name {
    char segname[16];
    char sectname[16];
};
typedef struct kxld_section_name KXLDSectionName;

/*******************************************************************************
* Logging
*******************************************************************************/

void kxld_set_logging_callback(KXLDLoggingCallback logging_callback)
    __attribute__((visibility("hidden")));

void kxld_set_logging_callback_data(const char * name, void *user_data)
    __attribute__((visibility("hidden")));

void kxld_log(KXLDLogSubsystem subsystem, KXLDLogLevel level, 
    const char *format, ...)
    __attribute__((visibility("hidden"), format(printf, 3, 4)));

/* Common logging strings */
#define kKxldLogArchNotSupported        "The target architecture (cputype 0x%x) is not supported by kxld."
#define kKxldLogArchNotFound            "The kext does not contain a fat slice for the target architecture."
#define kKxldLogFiletypeNotSupported    "The Mach-O filetype 0x%x is not supported on the target architecture."
#define kKxldLogTruncatedMachO          "The Mach-O file has been truncated. Make sure the Mach-O header structures are correct."
#define kKxldLogMalformedMachO          "The Mach-O file is malformed: "
#define kKxldLogMalformedVTable         "The vtable '%s' is malformed. Make sure your kext has been built against the correct headers."
#define kKxldLogMissingVtable           "Cannot find the vtable '%s' for class '%s'. This vtable symbol is required for binary compatibility, and it may have been stripped."
#define kKxldLogDirectPureVirtualCall   "This kext calls a pure virtual function. Make sure your kext's OSObject-derived classes implement all pure virtual functions."
#define kKxldLogParentOutOfDate         "The super class vtable '%s' for vtable '%s' is out of date. Make sure your kext has been built against the correct headers."
#define kKxldLogNoKmodInfo              "The kext is missing its kmod_info structure."
#define kKxldLogRelocationOverflow      "A relocation entry has overflowed. The kext may be too far from one " \
                                        "of its dependencies. Check your kext's load address."
#define kKxldLogRelocatingPatchedSym    "Relocation failed because some class in this kext "    \
    "didn't use the OSDeclareDefaultStructors and OSDefineMetaClassAndStructors, so it still "  \
    "references %s, which has been patched with another symbol for binary compatibility. "      \
    "Please make sure all classes that inherit from OSObject use these macros."

/*******************************************************************************
* Allocators 
*******************************************************************************/
    
void * kxld_alloc(size_t size) 
    __attribute__((malloc, visibility("hidden")));

void * kxld_page_alloc(size_t size) 
    __attribute__((malloc, visibility("hidden")));

void * kxld_page_alloc_untracked(size_t size) 
    __attribute__((malloc, visibility("hidden")));

void * kxld_alloc_pageable(size_t size) 
    __attribute__((malloc, visibility("hidden")));

/*******************************************************************************
* Deallocators
*******************************************************************************/

void kxld_free(void *ptr, size_t size) 
    __attribute__((visibility("hidden")));

void kxld_page_free(void *ptr, size_t size) 
    __attribute__((visibility("hidden")));
    
void kxld_page_free_untracked(void *ptr, size_t size) 
    __attribute__((visibility("hidden")));

/*******************************************************************************
* Mach-O Functions
*******************************************************************************/

kern_return_t validate_and_swap_macho_32(u_char *file, u_long size
#if !KERNEL
    , enum NXByteOrder host_order
#endif /* !KERNEL */
    ) __attribute__((visibility("hidden")));

kern_return_t validate_and_swap_macho_64(u_char *file, u_long size
#if !KERNEL
    , enum NXByteOrder host_order
#endif /* !KERNEL */
    ) __attribute__((visibility("hidden")));

#if !KERNEL
void unswap_macho(u_char *file, enum NXByteOrder host_order, 
    enum NXByteOrder target_order)
    __attribute__((visibility("hidden")));
#endif /* !KERNEL */

/*******************************************************************************
* Miscellaneous
*******************************************************************************/

kxld_addr_t kxld_align_address(kxld_addr_t address, u_int align)
    __attribute__((const, visibility("hidden")));

boolean_t kxld_is_32_bit(cpu_type_t)
    __attribute__((const, visibility("hidden")));

const char * kxld_strstr(const char *s, const char *find)
    __attribute__((pure, nonnull, visibility("hidden")));

/*******************************************************************************
* Debugging
*******************************************************************************/

void kxld_print_memory_report(void) 
    __attribute__((visibility("hidden")));

/*******************************************************************************
* Cross Linking
*******************************************************************************/
#if !KERNEL
boolean_t kxld_set_cross_link_page_size(kxld_size_t target_page_size);
#endif /* !KERNEL */
kxld_size_t kxld_get_effective_page_size(void);
kxld_addr_t kxld_round_page_cross_safe(kxld_addr_t addr);

#if SPLIT_KEXTS_DEBUG
void kxld_show_split_info(splitKextLinkInfo *info);
#endif

#endif /* _KXLD_UTIL_H_ */
Commit	Line	Data
b0d623f7 A	1	/*
	2	* Copyright (c) 2007-2008 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_UTIL_H_
	29	#define _KXLD_UTIL_H_
	30
b0d623f7 A	31	#include <sys/types.h>
	32	#if KERNEL
	33	#include <libkern/kxld_types.h>
316670eb	34	#include <mach/machine.h>
b0d623f7 A	35	#else
	36	#include <architecture/byte_order.h>
	37	#include "kxld_types.h"
316670eb A	38
	39	/* Get machine.h from the kernel source so we can support all platforms
	40	* that the kernel supports. Otherwise we're at the mercy of the host.
	41	*/
	42	#include "../../osfmk/mach/machine.h"
b0d623f7 A	43	#endif
	44
	45	/* 64-bit helpers */
	46	#if !defined(KERNEL)
	47
	48	#define KXLD_3264_FUNC(cond32, rval, func32, func64, ...) \
	49	do { \
	50	if (cond32) { \
	51	(rval) = (func32)(__VA_ARGS__); \
	52	} else { \
	53	(rval) = (func64)(__VA_ARGS__); \
	54	} \
	55	} while(0)
	56
	57	#elif defined(__LP64__)
	58
	59	#define KXLD_3264_FUNC(cond32, rval, func32, func64, ...) \
	60	do { \
	61	(rval) = (func64)(__VA_ARGS__); \
	62	} while(0)
	63
	64	#else
	65
	66	#define KXLD_3264_FUNC(cond32, rval, func32, func64, ...) \
	67	do { \
	68	(rval) = (func32)(__VA_ARGS__); \
	69	} while(0) \
	70
	71	#endif
	72
	73	/* Misc string functions */
	74	#define streq(str1, str2) (((str1) && (str2)) ? !strcmp((str1), (str2)) : 0)
	75	#define streq_safe(str1, str2, len) (((str1) && (str2)) ? \
	76	!strncmp((str1), (str2), (len)) : 0)
	77	#define const_strlen(str) (sizeof(str) - 1)
	78
	79	#define const_array_len(array) sizeof(array) / sizeof(*array)
	80
	81	/* Timing */
	82	#define DECL_TIMER() struct timeval start, end;
	83	#define START_TIMER() gettimeofday(&start, NULL);
	84	#define END_TIMER() gettimeofday(&end, NULL);
	85	#define PRINT_TIMER(msg) kxld_log("%s: %ds, %dus\n", (msg), \
	86	(end.tv_sec - start.tv_sec), (end.tv_usec - start.tv_usec));
	87
	88	/* Misc definitions */
	89	#define KXLD_MAX_NAME_LEN 256
	90	#define KXLD_SEG_GOT "__DATA"
	91	#define KXLD_SECT_GOT "__kxld_got"
	92	#define KXLD_KMOD_INFO_SYMBOL "_kmod_info"
	93	#define KXLD_WEAK_TEST_SYMBOL "_gOSKextUnresolved"
	94	#define KXLD_OPERATOR_NEW_SYMBOL "__Znwm"
	95	#define KXLD_OPERATOR_NEW_ARRAY_SYMBOL "__Znam"
	96	#define KXLD_OPERATOR_DELETE_SYMBOL "__ZdlPv"
	97	#define KXLD_OPERATOR_DELETE_ARRAY_SYMBOL "__ZdaPv"
	98
	99	struct kxld_section_name {
	100	char segname[16];
	101	char sectname[16];
	102	};
	103	typedef struct kxld_section_name KXLDSectionName;
	104
	105	/*******************************************************************************
	106	* Logging
107	*******************************************************************************/
108
109	void kxld_set_logging_callback(KXLDLoggingCallback logging_callback)
110	__attribute__((visibility("hidden")));
111
112	void kxld_set_logging_callback_data(const char * name, void *user_data)
113	__attribute__((visibility("hidden")));
114
115	void kxld_log(KXLDLogSubsystem subsystem, KXLDLogLevel level,
116	const char *format, ...)
117	__attribute__((visibility("hidden"), format(printf, 3, 4)));
118
119	/* Common logging strings */
120	#define kKxldLogArchNotSupported "The target architecture (cputype 0x%x) is not supported by kxld."
121	#define kKxldLogArchNotFound "The kext does not contain a fat slice for the target architecture."
122	#define kKxldLogFiletypeNotSupported "The Mach-O filetype 0x%x is not supported on the target architecture."
b7266188	123	#define kKxldLogTruncatedMachO "The Mach-O file has been truncated. Make sure the Mach-O header structures are correct."
b0d623f7	124	#define kKxldLogMalformedMachO "The Mach-O file is malformed: "
b7266188 A	125	#define kKxldLogMalformedVTable "The vtable '%s' is malformed. Make sure your kext has been built against the correct headers."
b7266188 A	126	#define kKxldLogMissingVtable "Cannot find the vtable '%s' for class '%s'. This vtable symbol is required for binary compatibility, and it may have been stripped."
6d2010ae	127	#define kKxldLogDirectPureVirtualCall "This kext calls a pure virtual function. Make sure your kext's OSObject-derived classes implement all pure virtual functions."
b7266188	128	#define kKxldLogParentOutOfDate "The super class vtable '%s' for vtable '%s' is out of date. Make sure your kext has been built against the correct headers."
b0d623f7	129	#define kKxldLogNoKmodInfo "The kext is missing its kmod_info structure."
b7266188 A	130	#define kKxldLogRelocationOverflow "A relocation entry has overflowed. The kext may be too far from one " \
b7266188 A	131	"of its dependencies. Check your kext's load address."
6d2010ae A	132	#define kKxldLogRelocatingPatchedSym "Relocation failed because some class in this kext " \
	133	"didn't use the OSDeclareDefaultStructors and OSDefineMetaClassAndStructors, so it still " \
	134	"references %s, which has been patched with another symbol for binary compatibility. " \
	135	"Please make sure all classes that inherit from OSObject use these macros."
b0d623f7 A	136
	137	/*******************************************************************************
	138	* Allocators
	139	*******************************************************************************/
	140
	141	void * kxld_alloc(size_t size)
	142	__attribute__((malloc, visibility("hidden")));
	143
	144	void * kxld_page_alloc(size_t size)
	145	__attribute__((malloc, visibility("hidden")));
	146
	147	void * kxld_page_alloc_untracked(size_t size)
	148	__attribute__((malloc, visibility("hidden")));
	149
	150	void * kxld_alloc_pageable(size_t size)
	151	__attribute__((malloc, visibility("hidden")));
	152
	153	/*******************************************************************************
	154	* Deallocators
	155	*******************************************************************************/
	156
	157	void kxld_free(void *ptr, size_t size)
	158	__attribute__((visibility("hidden")));
	159
	160	void kxld_page_free(void *ptr, size_t size)
	161	__attribute__((visibility("hidden")));
	162
	163	void kxld_page_free_untracked(void *ptr, size_t size)
	164	__attribute__((visibility("hidden")));
	165
	166	/*******************************************************************************
	167	* Mach-O Functions
	168	*******************************************************************************/
	169
	170	kern_return_t validate_and_swap_macho_32(u_char *file, u_long size
	171	#if !KERNEL
	172	, enum NXByteOrder host_order
	173	#endif /* !KERNEL */
	174	) __attribute__((visibility("hidden")));
	175
	176	kern_return_t validate_and_swap_macho_64(u_char *file, u_long size
	177	#if !KERNEL
	178	, enum NXByteOrder host_order
	179	#endif /* !KERNEL */
	180	) __attribute__((visibility("hidden")));
	181
	182	#if !KERNEL
	183	void unswap_macho(u_char *file, enum NXByteOrder host_order,
	184	enum NXByteOrder target_order)
	185	__attribute__((visibility("hidden")));
	186	#endif /* !KERNEL */
	187
	188	/*******************************************************************************
	189	* Miscellaneous
	190	*******************************************************************************/
	191
	192	kxld_addr_t kxld_align_address(kxld_addr_t address, u_int align)
6d2010ae	193	__attribute__((const, visibility("hidden")));
b0d623f7 A	194
b0d623f7 A	195	boolean_t kxld_is_32_bit(cpu_type_t)
6d2010ae	196	__attribute__((const, visibility("hidden")));
b0d623f7 A	197
	198	const char * kxld_strstr(const char s, const char find)
	199	__attribute__((pure, nonnull, visibility("hidden")));
	200
	201	/*******************************************************************************
	202	* Debugging
	203	*******************************************************************************/
	204
	205	void kxld_print_memory_report(void)
	206	__attribute__((visibility("hidden")));
	207
3e170ce0 A	208	/*******************************************************************************
	209	* Cross Linking
	210	*******************************************************************************/
	211	#if !KERNEL
	212	boolean_t kxld_set_cross_link_page_size(kxld_size_t target_page_size);
	213	#endif /* !KERNEL */
	214	kxld_size_t kxld_get_effective_page_size(void);
	215	kxld_addr_t kxld_round_page_cross_safe(kxld_addr_t addr);
	216
39037602 A	217	#if SPLIT_KEXTS_DEBUG
	218	void kxld_show_split_info(splitKextLinkInfo *info);
	219	#endif
3e170ce0	220
b0d623f7	221	#endif /* _KXLD_UTIL_H_ */