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/*-------------------------------------------------------------------------
*
* dl.h
*
*
*
* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/backend/port/dynloader/ultrix4.h,v 1.15 2004/12/31 22:00:32 pgsql Exp $
*
*-------------------------------------------------------------------------
*/
/*
* Ultrix 4.x Dynamic Loader Library Version 1.0
*
* dl.h
* header file for the Dynamic Loader Library
*
*
* Copyright (c) 1993 Andrew K. Yu, University of California at Berkeley
* All rights reserved.
*
* Permission to use, copy, modify, and distribute this software and its
* documentation for educational, research, and non-profit purposes and
* without fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright notice and
* this permission notice appear in supporting documentation. Permission
* to incorporate this software into commercial products can be obtained
* from the author. The University of California and the author make
* no representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
*
*/
#ifndef _DL_HEADER_
#define _DL_HEADER_
#include <stdio.h>
#include "filehdr.h"
#include "syms.h"
#include "ldfcn.h"
#include "reloc.h"
#include "scnhdr.h"
typedef long CoreAddr;
typedef struct ScnInfo
{
CoreAddr addr; /* starting address of the section */
SCNHDR hdr; /* section header */
RELOC *relocEntries; /* relocation entries */
} ScnInfo;
typedef enum
{
DL_NEEDRELOC, /* still need relocation */
DL_RELOCATED, /* no relocation necessary */
DL_INPROG /* relocation in progress */
} dlRStatus;
typedef struct JmpTbl
{
char *block; /* the jump table memory block */
struct JmpTbl *next; /* next block */
} JmpTbl;
typedef struct dlFile
{
char *filename; /* file name of the object file */
int textSize; /* used by mprotect */
CoreAddr textAddress; /* start addr of text section */
long textVaddr; /* vaddr of text section in obj file */
CoreAddr rdataAddress; /* start addr of rdata section */
long rdataVaddr; /* vaddr of text section in obj file */
CoreAddr dataAddress; /* start addr of data section */
long dataVaddr; /* vaddr of text section in obj file */
CoreAddr bssAddress; /* start addr of bss section */
long bssVaddr; /* vaddr of text section in obj file */
int nsect; /* number of sections */
ScnInfo *sect; /* details of each section (array) */
int issExtMax; /* size of string space */
char *extss; /* extern sym string space (in core) */
int iextMax; /* maximum number of Symbols */
pEXTR extsyms; /* extern syms */
dlRStatus relocStatus; /* what relocation needed? */
int needReloc;
JmpTbl *jmptable; /* the jump table for R_JMPADDR */
struct dlFile *next; /* next member of the archive */
} dlFile;
typedef struct dlSymbol
{
char *name; /* name of the symbol */
long addr; /* address of the symbol */
dlFile *objFile; /* from which file */
} dlSymbol;
/*
* prototypes for the dl* interface
*/
extern void *dl_open( /* char *filename, int mode */ );
extern void *dl_sym( /* void *handle, char *name */ );
extern void dl_close( /* void *handle */ );
extern char *dl_error( /* void */ );
#define DL_LAZY 0 /* lazy resolution */
#define DL_NOW 1 /* immediate resolution */
/*
* Miscellaneous utility routines:
*/
extern char **dl_undefinedSymbols( /* int *count */ );
extern void dl_printAllSymbols( /* void *handle */ );
extern void dl_setLibraries( /* char *libs */ );
#endif /* _DL_HEADER_ */
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