FreeBSD/Linux Kernel Cross Reference
sys/sys/kobj_impl.h

     /*      $NetBSD: kobj_impl.h,v 1.5 2016/07/20 13:36:19 maxv Exp $       */
     
     /*-
      * Copyright (c) 2008, 2009 The NetBSD Foundation, Inc.
      * All rights reserved.
      *
      * This code is derived from software developed for The NetBSD Foundation
      * by Andrew Doran.
      *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     * POSSIBILITY OF SUCH DAMAGE.
     */
    
    /*-
     * Copyright (c) 1998-2000 Doug Rabson
     * Copyright (c) 2004 Peter Wemm
     * All rights reserved.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     */
    
    /*
     * Data structures private to kobj, shared only with kernel grovellers.
     */
    
    #ifndef _SYS_KOBJ_IMPL_H_
    #define _SYS_KOBJ_IMPL_H_
    
    #define ELFSIZE         ARCH_ELFSIZE
    
    #include <sys/systm.h>
    #include <sys/kobj.h>
    #include <sys/exec.h>
    #include <sys/exec_elf.h>
    #include <sys/module.h>
    
    typedef struct {
            void            *addr;
            Elf_Off         size;
            int             flags;
            int             sec;            /* Original section */
            const char      *name;
    } progent_t;
    
    typedef struct {
            Elf_Rel         *rel;
            int             nrel;
            int             sec;
            size_t          size;
    } relent_t;
    
    typedef struct {
            Elf_Rela        *rela;
            int             nrela;
            int             sec;
            size_t          size;
    } relaent_t;
    
    typedef enum kobjtype {
            KT_UNSET,
            KT_VNODE,
            KT_MEMORY
   } kobjtype_t;
   
   typedef int (*kobj_read_fn)(kobj_t, void **, size_t, off_t, bool);
   typedef void (*kobj_close_fn)(kobj_t);
   
   struct kobj {
           char            ko_name[MAXMODNAME];
           kobjtype_t      ko_type;
           void            *ko_source;
           ssize_t         ko_memsize;
           vaddr_t         ko_text_address;        /* Address of text segment */
           vaddr_t         ko_data_address;        /* Address of data segment */
           vaddr_t         ko_rodata_address;      /* Address of rodata segment */
           Elf_Shdr        *ko_shdr;
           progent_t       *ko_progtab;
           relaent_t       *ko_relatab;
           relent_t        *ko_reltab;
           Elf_Sym         *ko_symtab;     /* Symbol table */
           char            *ko_strtab;     /* String table */
           char            *ko_shstrtab;   /* Section name string table */
           size_t          ko_text_size;   /* Size of text segment */
           size_t          ko_data_size;   /* Size of data/bss segment */
           size_t          ko_rodata_size; /* Size of rodata segment */
           size_t          ko_symcnt;      /* Number of symbols */
           size_t          ko_strtabsz;    /* Number of bytes in string table */
           size_t          ko_shstrtabsz;  /* Number of bytes in scn str table */
           size_t          ko_shdrsz;
           int             ko_nrel;
           int             ko_nrela;
           int             ko_nprogtab;
           bool            ko_ksyms;
           bool            ko_loaded;
           kobj_read_fn    ko_read;
           kobj_close_fn   ko_close;
   };
   
   #ifdef _KERNEL
   int     kobj_load(kobj_t);
   void    kobj_setname(kobj_t, const char *);
   #endif
   
   #endif  /* _SYS_KOBJ_IMPL_H_ */

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