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/*
* dl_libv2.h :
* defines and function defs for dl_libv2.c
*
* libdl.o needs to be linked in with the other object code to be loaded,
* in order to provide its fucktionality.
*
* dl_libv2.o will allow the dynamic linking against libraries that the
* runtime dynamic linker can find an mmap in... this means that you can
* use system libraries, or the full path to another library.
*
* The interface is described below.
* !! BE AWARE that this version of libdl uses the heap !!
* if you require a stack based libdl, then uses libdl_stack, which
* is availble in this distro.. (actually, dl_lib_stack.c was rm'd by
* accident... it requires too much work with alloca in main() anyway....
* just use the damn heap!)
*
*
* Copyright the grugq, 2001.
*/
#ifndef _LIB_DYN_LINKER__H
#define _LIB_DYN_LINKER__H
#include <elf.h>
#define __syscall1(type,name,type1,arg1) \
type _##name(type1 arg1) \
{ \
long __res; \
__asm__ volatile ("int $0x80" \
: "=a" (__res) \
: "0" (__NR_##name),"b" ((long)(arg1))); \
return (type) __res; \
}
#define __syscall3(type,name,type1,arg1,type2,arg2,type3,arg3) \
type _##name(type1 arg1,type2 arg2,type3 arg3) \
{ \
long __res; \
__asm__ volatile ("int $0x80" \
: "=a" (__res) \
: "0" (__NR_##name),"b" ((long)(arg1)),"c" ((long)(arg2)), \
"d" ((long)(arg3))); \
return (type) __res; \
}
#define NULL ((void *)0) /* to avoid stdio.h */
#define BUFSIZ 4096 /* should be plenty */
struct lib_desc
{
Elf32_Word * l_buckets; /* addr of the hash table */
Elf32_Word l_nbuckets; /* number of buckets in hash tab */
Elf32_Word l_nchain; /* number of elements in chain */
Elf32_Word * l_chain; /* addr of the chain */
Elf32_Sym * l_symtab; /* ptr to symbol table */
char * l_strtab; /* ptr to string table */
char * l_load_addr; /* load address of the library */
void * l_handle; /* handle from dlopen(), for dlcose() */
struct lib_desc * l_prev; /* pointer to previous LibDesc */
struct lib_desc * l_next; /* pointer to next LibDesc */
/* These values are only intialized for the head of the list */
void *(*malloc)(unsigned long); /* fct ptr to malloc(3) */
void (*free)(void *); /* fct ptr to free(3) */
void *(*dlopen)(char *, int, void *)
__attribute__ ((regparm(3))); /* fct ptr to _dl_open() */
void (*dlclose)(void *)
__attribute__ ((regparm(1))); /* fct ptr to _dl_close() */
};
typedef struct lib_desc LibDesc;
/* PROTOTYPES */
void * dl_lib_init(void);
void dl_lib_fini(void *h);
void * dl_lib_open(char *lib_name, void *head);
void * dl_lib_sym(char *sym_name, void *handler);
void dl_lib_close(void *lib, void *head);
#endif /* _LIB_DYN_LINKER__H */
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