text: #ifndef _HASH_H_
  #define _HASH_H_
  
  #include "linuxelf.h"
  
  /* Header file that describes the internal data structures used by the
   * ELF dynamic linker.  */
  
  struct link_map
  {
    /* These entries must be in this order to be compatible with the
     * interface used by gdb to obtain the list of symbols. */
    Elf32_Addr l_addr;	/* address at which object is mapped */
    char *l_name;		/* full name of loaded object */
    Elf32_Dyn *l_ld;	/* dynamic structure of object */
    struct link_map *l_next;
    struct link_map *l_prev;
  };
  
  /* The DT_DEBUG entry in the .dynamic section is given the address of
   * this structure. gdb can pick this up to obtain the correct list of
   * loaded modules. */
  struct r_debug
  {
    int r_version;		/* debugging info version no */
    struct link_map *r_map;	/* address of link_map */
    unsigned long r_brk;		/* address of update routine */
    enum
    {
      RT_CONSISTENT,
      RT_ADD,
      RT_DELETE
    } r_state;
    unsigned long r_ldbase;	/* base addr of ld.so */
  };
  
  #ifndef RTLD_NEXT
  #define RTLD_NEXT	((void*)-1)
  #endif
  
  struct dyn_elf{
    unsigned long flags;
    struct elf_resolve * dyn;
    struct dyn_elf * next_handle;  /* Used by dlopen et al. */
    struct dyn_elf * next;
    struct dyn_elf * prev;
  };
   
  struct elf_resolve{
    /* These entries must be in this order to be compatible with the interface used
       by gdb to obtain the list of symbols. */
    char * loadaddr;
    char * libname;
    unsigned long dynamic_addr;
    struct elf_resolve * next;
    struct elf_resolve * prev;
    /* Nothing after this address is used by gdb. */
    enum {elf_lib, elf_executable,program_interpreter, loaded_file} libtype;
    struct dyn_elf * symbol_scope;
    unsigned short usage_count;
    unsigned short int init_flag;
    unsigned int nbucket;
    unsigned long * elf_buckets;
    /*
     * These are only used with ELF style shared libraries
     */
    unsigned long nchain;
    unsigned long * chains;
    unsigned long dynamic_info[24];
  
    unsigned long dynamic_size;
    unsigned long n_phent;
    Elf32_Phdr * ppnt;
  
  #if defined(__mips__)
    /* Needed for MIPS relocation */
    unsigned long mips_gotsym;
    unsigned long mips_local_gotno;
    unsigned long mips_symtabno;
  #endif
  
  #ifdef __powerpc__
    /* this is used to store the address of relocation data words, so
     * we don't have to calculate it every time, which requires a divide */
    unsigned long data_words;
  #endif
  };
  
  #if 0
  /*
   * The DT_DEBUG entry in the .dynamic section is given the address of this structure.
   * gdb can pick this up to obtain the correct list of loaded modules.
   */
  
  struct r_debug{
    int r_version;
    struct elf_resolve * link_map;
    unsigned long brk_fun;
    enum {RT_CONSISTENT, RT_ADD, RT_DELETE};
    unsigned long ldbase;
  };
  #endif
  
  #define COPY_RELOCS_DONE 1
  #define RELOCS_DONE 2
  #define JMP_RELOCS_DONE 4
  #define INIT_FUNCS_CALLED 8
  
  extern struct dyn_elf     * _dl_symbol_tables;
  extern struct elf_resolve * _dl_loaded_modules;
  extern struct dyn_elf 	  * _dl_handles;
  
  extern struct elf_resolve * _dl_check_hashed_files(const char * libname);
  extern struct elf_resolve * _dl_add_elf_hash_table(const char * libname, 
  	char * loadaddr, unsigned long * dynamic_info, 
  	unsigned long dynamic_addr, unsigned long dynamic_size);
  
  enum caller_type{symbolrel=0,copyrel=1,resolver=2};
  extern char * _dl_find_hash(const char * name, struct dyn_elf * rpnt1, 
  	struct elf_resolve * f_tpnt, enum caller_type);
  
  extern int _dl_linux_dynamic_link(void);
  
  extern char * _dl_library_path;
  extern char * _dl_not_lazy;
  extern unsigned long _dl_elf_hash(const char * name);
  
  static inline int _dl_symbol(char * name)
  {
    if(name[0] != '_' || name[1] != 'd' || name[2] != 'l' || name[3] != '_')
      return 0;
    return 1;
  }
  
  
  #define LD_ERROR_NOFILE 1
  #define LD_ERROR_NOZERO 2
  #define LD_ERROR_NOTELF 3
  #define LD_ERROR_NOTMAGIC 4
  #define LD_ERROR_NOTDYN 5
  #define LD_ERROR_MMAP_FAILED 6
  #define LD_ERROR_NODYNAMIC 7
  #define LD_WRONG_RELOCS 8
  #define LD_BAD_HANDLE 9
  #define LD_NO_SYMBOL 10
  
  
  
  #endif /* _HASH_H_ */
  
  
  