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      1 /*	$NetBSD: kobj_impl.h,v 1.5 2016/07/20 13:36:19 maxv Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2008, 2009 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software developed for The NetBSD Foundation
      8  * by Andrew Doran.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 /*-
     33  * Copyright (c) 1998-2000 Doug Rabson
     34  * Copyright (c) 2004 Peter Wemm
     35  * All rights reserved.
     36  *
     37  * Redistribution and use in source and binary forms, with or without
     38  * modification, are permitted provided that the following conditions
     39  * are met:
     40  * 1. Redistributions of source code must retain the above copyright
     41  *    notice, this list of conditions and the following disclaimer.
     42  * 2. Redistributions in binary form must reproduce the above copyright
     43  *    notice, this list of conditions and the following disclaimer in the
     44  *    documentation and/or other materials provided with the distribution.
     45  *
     46  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     47  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     48  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     49  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     50  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     51  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     52  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     53  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     54  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     55  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     56  * SUCH DAMAGE.
     57  */
     58 
     59 /*
     60  * Data structures private to kobj, shared only with kernel grovellers.
     61  */
     62 
     63 #ifndef _SYS_KOBJ_IMPL_H_
     64 #define	_SYS_KOBJ_IMPL_H_
     65 
     66 #define	ELFSIZE		ARCH_ELFSIZE
     67 
     68 #include <sys/systm.h>
     69 #include <sys/kobj.h>
     70 #include <sys/exec.h>
     71 #include <sys/exec_elf.h>
     72 #include <sys/module.h>
     73 
     74 typedef struct {
     75 	void		*addr;
     76 	Elf_Off		size;
     77 	int		flags;
     78 	int		sec;		/* Original section */
     79 	const char	*name;
     80 } progent_t;
     81 
     82 typedef struct {
     83 	Elf_Rel		*rel;
     84 	int 		nrel;
     85 	int 		sec;
     86 	size_t		size;
     87 } relent_t;
     88 
     89 typedef struct {
     90 	Elf_Rela	*rela;
     91 	int		nrela;
     92 	int		sec;
     93 	size_t		size;
     94 } relaent_t;
     95 
     96 typedef enum kobjtype {
     97 	KT_UNSET,
     98 	KT_VNODE,
     99 	KT_MEMORY
    100 } kobjtype_t;
    101 
    102 typedef int (*kobj_read_fn)(kobj_t, void **, size_t, off_t, bool);
    103 typedef void (*kobj_close_fn)(kobj_t);
    104 
    105 struct kobj {
    106 	char		ko_name[MAXMODNAME];
    107 	kobjtype_t	ko_type;
    108 	void		*ko_source;
    109 	ssize_t		ko_memsize;
    110 	vaddr_t		ko_text_address;	/* Address of text segment */
    111 	vaddr_t		ko_data_address;	/* Address of data segment */
    112 	vaddr_t		ko_rodata_address;	/* Address of rodata segment */
    113 	Elf_Shdr	*ko_shdr;
    114 	progent_t	*ko_progtab;
    115 	relaent_t	*ko_relatab;
    116 	relent_t	*ko_reltab;
    117 	Elf_Sym		*ko_symtab;	/* Symbol table */
    118 	char		*ko_strtab;	/* String table */
    119 	char		*ko_shstrtab;	/* Section name string table */
    120 	size_t		ko_text_size;	/* Size of text segment */
    121 	size_t		ko_data_size;	/* Size of data/bss segment */
    122 	size_t		ko_rodata_size;	/* Size of rodata segment */
    123 	size_t		ko_symcnt;	/* Number of symbols */
    124 	size_t		ko_strtabsz;	/* Number of bytes in string table */
    125 	size_t		ko_shstrtabsz;	/* Number of bytes in scn str table */
    126 	size_t		ko_shdrsz;
    127 	int		ko_nrel;
    128 	int		ko_nrela;
    129 	int		ko_nprogtab;
    130 	bool		ko_ksyms;
    131 	bool		ko_loaded;
    132 	kobj_read_fn	ko_read;
    133 	kobj_close_fn	ko_close;
    134 };
    135 
    136 #ifdef _KERNEL
    137 int	kobj_load(kobj_t);
    138 void	kobj_setname(kobj_t, const char *);
    139 #endif
    140 
    141 #endif	/* _SYS_KOBJ_IMPL_H_ */
    142