/*
 * File elf_private.h - definitions for processing of ELF files
 *
 * Copyright (C) 1996, Eric Youngdale.
 *		 1999-2007 Eric Pouech
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 */

#ifdef HAVE_ELF_H
# include <elf.h>
#endif
#ifdef HAVE_SYS_ELF32_H
# include <sys/elf32.h>
#endif
#ifdef HAVE_SYS_EXEC_ELF_H
# include <sys/exec_elf.h>
#endif
#if !defined(DT_NUM)
# if defined(DT_COUNT)
#  define DT_NUM DT_COUNT
# else
/* this seems to be a satisfactory value on Solaris, which doesn't support this AFAICT */
#  define DT_NUM 24
# endif
#endif
#ifdef HAVE_LINK_H
# include <link.h>
#endif
#ifdef HAVE_SYS_LINK_H
# include <sys/link.h>
#endif

#define IMAGE_NO_MAP  ((void*)-1)

#ifdef __ELF__

#ifdef _WIN64
#define         Elf_Ehdr        Elf64_Ehdr
#define         Elf_Shdr        Elf64_Shdr
#define         Elf_Phdr        Elf64_Phdr
#define         Elf_Dyn         Elf64_Dyn
#define         Elf_Sym         Elf64_Sym
#else
#define         Elf_Ehdr        Elf32_Ehdr
#define         Elf_Shdr        Elf32_Shdr
#define         Elf_Phdr        Elf32_Phdr
#define         Elf_Dyn         Elf32_Dyn
#define         Elf_Sym         Elf32_Sym
#endif

/* structure holding information while handling an ELF image
 * allows one by one section mapping for memory savings
 */
struct elf_file_map
{
    size_t                      elf_size;
    size_t                      elf_start;
    int                         fd;
    const char*	                shstrtab;
    struct elf_file_map*        alternate;      /* another ELF file (linked to this one) */
    Elf_Ehdr                    elfhdr;
    struct
    {
        Elf_Shdr                        shdr;
        const char*                     mapped;
    }*                          sect;
};

struct elf_section_map
{
    struct elf_file_map*        fmap;
    long                        sidx;
};

extern BOOL         elf_find_section(struct elf_file_map* fmap, const char* name,
                                     unsigned sht, struct elf_section_map* esm);
extern const char*  elf_map_section(struct elf_section_map* esm);
extern void         elf_unmap_section(struct elf_section_map* esm);
extern unsigned     elf_get_map_size(const struct elf_section_map* esm);

#endif