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#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. */
unsigned long 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 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(char * libname);
extern struct elf_resolve * _dl_add_elf_hash_table(char * libname,
char * loadaddr, unsigned long * dynamic_info,
unsigned long dynamic_addr, unsigned long dynamic_size);
extern char * _dl_find_hash(char * name, struct dyn_elf * rpnt1,
struct elf_resolve * f_tpnt, int copyrel);
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 DL_ERROR_NOFILE 1
#define DL_ERROR_NOZERO 2
#define DL_ERROR_NOTELF 3
#define DL_ERROR_NOTMAGIC 4
#define DL_ERROR_NOTDYN 5
#define DL_ERROR_MMAP_FAILED 6
#define DL_ERROR_NODYNAMIC 7
#define DL_WRONG_RELOCS 8
#define DL_BAD_HANDLE 9
#define DL_NO_SYMBOL 10
#endif /* _HASH_H_ */
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