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2968 svoboda 1
/*
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 * Copyright (c) 2008 Jiri Svoboda
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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/** @addtogroup generic
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 * @{
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 */
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/** @file
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 */
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#ifndef DYNAMIC_H_
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#define DYNAMIC_H_
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#include <bool.h>
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#include <elf_dyn.h>
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#include <arch/dynamic.h>
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/**
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 * Holds the data extracted from an ELF Dynamic section.
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 *
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 * The data is already pre-processed: Pointers are adjusted
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 * to their final run-time values by adding the load bias
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 * and indices into the symbol table are converted to pointers.
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 */
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typedef struct dyn_info {
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    /** Type of relocations used for the PLT, either DT_REL or DT_RELA */
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    int plt_rel;
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    /** Relocation table without explicit addends */
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    void *rel;
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    size_t rel_sz;
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    size_t rel_ent;
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    /** Relocation table with explicit addends */
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    void *rela;
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    size_t rela_sz;
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    size_t rela_ent;
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    /** PLT relocation table */
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    void *jmp_rel;
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    size_t plt_rel_sz;
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    /** Pointer to PLT/GOT (processor-specific) */
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    void *plt_got;
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    /** Hash table */
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    elf_word *hash;
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    /** String table */
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    char *str_tab;
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    size_t str_sz;
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    /** Symbol table */
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    void *sym_tab;
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    size_t sym_ent;
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    void *init; /**< Module initialization code */
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    void *fini; /**< Module cleanup code */
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    char *soname;   /**< Library identifier */
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    char *rpath;    /**< Library search path list */
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    bool symbolic;
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    bool text_rel;
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    bool bind_now;
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    /* Assume for now that there's at most one needed library */
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    char *needed;
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    /** Pointer to the module's dynamic section */
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    elf_dyn_t *dynamic;
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    /** Architecture-specific info. */
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    dyn_info_arch_t arch;
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} dyn_info_t;
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void dynamic_parse(elf_dyn_t *dyn_ptr, size_t bias, dyn_info_t *info);
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void dyn_parse_arch(elf_dyn_t *dp, size_t bias, dyn_info_t *info);
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#endif
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/** @}
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 */