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/* $XFree86: xc/programs/Xserver/hw/xfree86/loader/loader.h,v 1.25 2001/02/22 23:17:09 dawes Exp $ */
/*
*
* Copyright 1995-1998 by Metro Link, Inc.
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of Metro Link, Inc. not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. Metro Link, Inc. makes no
* representations about the suitability of this software for any purpose.
* It is provided "as is" without express or implied warranty.
*
* METRO LINK, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL METRO LINK, INC. BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef _LOADER_H
#define _LOADER_H
#include "sym.h"
#if defined(Lynx) && defined(sun)
#define const /**/
#endif
#if (defined(__i386__) || defined(__ix86)) && !defined(i386)
#define i386
#endif
#include <X11/Xosdefs.h>
#include <X11/Xfuncproto.h>
#include <X11/Xmd.h>
/* For LOOKUP definition */
#include "sym.h"
#define LD_UNKNOWN -1
#define LD_ARCHIVE 0
#define LD_ELFOBJECT 1
#define LD_COFFOBJECT 2
#define LD_XCOFFOBJECT 3
#define LD_AOUTOBJECT 4
#define LD_AOUTDLOBJECT 5
#define LD_ELFDLOBJECT 6
#define LD_PROCESSED_ARCHIVE -1
/* #define UNINIT_SECTION */
#define HANDLE_IN_HASH_ENTRY
/*
* COFF Section nmumbers
*/
#define N_TEXT 1
#define N_DATA 2
#define N_BSS 3
#define N_COMMENT 4
#define TestFree(a) if (a) { xfree (a); a = NULL; }
#define HASHDIV 10
#define HASHSIZE (1<<HASHDIV)
typedef struct _elf_reloc *ELFRelocPtr;
typedef struct _elf_COMMON *ELFCommonPtr;
typedef struct _coff_reloc *COFFRelocPtr;
typedef struct _coff_COMMON *COFFCommonPtr;
typedef struct AOUT_RELOC *AOUTRelocPtr;
typedef struct AOUT_COMMON *AOUTCommonPtr;
typedef struct _LoaderReloc {
int modtype;
struct _LoaderReloc *next;
COFFRelocPtr coff_reloc;
ELFRelocPtr elf_reloc;
AOUTRelocPtr aout_reloc;
} LoaderRelocRec, *LoaderRelocPtr;
typedef struct _loader_item *itemPtr;
typedef struct _loader_item {
char *name ;
void *address ;
itemPtr next ;
int handle ;
int module ;
itemPtr exports;
#if defined(__powerpc__)
/*
* PowerPC file formats require special routines in some circumstances
* to assist in the linking process. See the specific loader for
* more details.
*/
union {
unsigned short plt[8]; /* ELF */
unsigned short glink[14]; /* XCOFF */
} code ;
#endif
} itemRec ;
/* The following structures provide an interface to GDB (note that GDB
has copies of the definitions - if you change anything here make
sure that the changes are also made to GDB */
typedef struct {
char *name; /* Name of this symbol */
unsigned int namelen; /* Name of this module */
void *addr; /* Start address of the .text section */
} LDRCommon, *LDRCommonPtr;
typedef struct x_LDRModuleRec{
unsigned int version; /* Version of this struct */
char *name; /* Name of this module */
unsigned int namelen; /* Length of name */
void *text; /* Start address of the .text section */
void *data; /* Start address of the .data section */
void *rodata; /* Start address of the .rodata section */
void *bss; /* Start address of the .bss section */
LDRCommonPtr commons; /* List of commmon symbols */
int commonslen; /* Number of common symbols */
struct x_LDRModuleRec *next; /* Next module record in chain */
} LDRModuleRec, *LDRModulePtr;
extern char DebuggerPresent;
extern LDRModulePtr ModList;
extern LDRCommonPtr ldrCommons;
extern int nCommons;
/*
* The loader uses loader specific alloc/calloc/free functions that
* are mapped to either to the regular Xserver functions, or in a couple
* of special cases, mapped to the C library functions.
*/
#if !defined(PowerMAX_OS) && !(defined(linux) && (defined(__alpha__) || defined(__powerpc__) || defined(__ia64__))) && 0
#define xf86loadermalloc(size) xalloc(size)
#define xf86loaderrealloc(ptr,size) xrealloc(ptr,size)
#define xf86loadercalloc(num,size) xcalloc(num,size)
#define xf86loaderfree(ptr) xfree(ptr)
#define xf86loaderstrdup(ptr) xstrdup(ptr)
#else
/*
* On Some OSes, xalloc() et al uses mmap to allocate space for large
* allocation. This has the effect of placing the text section of some
* modules very far away from the rest which are placed on the heap.
* Certain relocations are limited in the size of the offsets that can be
* handled, and this seperation causes these relocation to overflow. This
* is fixed by just using the C library allocation functions for the loader
* to ensure that all text sections are located on the heap. OSes that have
* this problem are:
* PowerMAX_OS/PPC
* Linux/Alpha
* Linux/PPC
* Linux/IA-64
*/
#define xf86loadermalloc(size) malloc(size)
#define xf86loaderrealloc(ptr,size) realloc(ptr,size)
#define xf86loadercalloc(num,size) calloc(num,size)
#define xf86loaderfree(ptr) free(ptr)
#define xf86loaderstrdup(ptr) strdup(ptr)
#endif
typedef struct _loader *loaderPtr;
/*
* _loader_funcs hold the entry points for a module format.
*/
typedef void * (*LoadModuleProcPtr)(loaderPtr modrec, int fd, LOOKUP **);
typedef void (*ResolveSymbolsProcPtr)(void *);
typedef int (*CheckForUnresolvedProcPtr)(void *);
typedef char * (*AddressToSectionProcPtr)(void *, unsigned long);
typedef void (*LoaderUnloadProcPtr)(void *);
typedef struct _loader_funcs {
LoadModuleProcPtr LoadModule;
ResolveSymbolsProcPtr ResolveSymbols;
CheckForUnresolvedProcPtr CheckForUnresolved;
AddressToSectionProcPtr AddressToSection;
LoaderUnloadProcPtr LoaderUnload;
LoaderRelocRec pRelocs; /* type specific relocations */
} loader_funcs;
/* Each module loaded has a loaderRec */
typedef struct _loader {
int handle; /* Unique id used to remove symbols from
this module when it is unloaded */
int module; /* Unique id to identify compilation units */
char *name;
char *cname;
void *private; /* format specific data */
loader_funcs *funcs; /* funcs for operating on this module */
loaderPtr next;
} loaderRec;
/* Compiled-in version information */
typedef struct {
INT32 xf86Version;
INT32 ansicVersion;
INT32 videodrvVersion;
INT32 xinputVersion;
INT32 extensionVersion;
INT32 fontVersion;
} ModuleVersions;
extern ModuleVersions LoaderVersionInfo;
extern unsigned long LoaderOptions;
/* Internal Functions */
void LoaderAddSymbols(int, int, LOOKUP *);
void LoaderDefaultFunc(void);
void LoaderDuplicateSymbol(const char *, const int);
#if 0
void LoaderFixups(void);
#endif
void LoaderResolve(void);
int LoaderResolveSymbols(void);
int _LoaderHandleUnresolved(char *, char *);
void LoaderHashAdd(itemPtr);
itemPtr LoaderHashDelete(const char *);
itemPtr LoaderHashFind(const char *);
void LoaderHashTraverse(void *, int (*)(void *, itemPtr));
void LoaderPrintAddress(const char *);
void LoaderPrintItem(itemPtr);
void LoaderPrintSymbol(unsigned long);
void LoaderDumpSymbols(void);
char *_LoaderModuleToName(int);
int _LoaderAddressToSection(const unsigned long, const char **, const char **);
int LoaderOpen(const char *, const char *, int, int *, int *, int *);
int LoaderHandleOpen(int);
/*
* File interface functions
*/
void *_LoaderFileToMem(int fd, unsigned long offset, int size, char *label);
void _LoaderFreeFileMem(void *addr, int size);
int _LoaderFileRead(int fd, unsigned int offset, void *addr, int size);
/*
* Relocation list manipulation routines
*/
LoaderRelocPtr _LoaderGetRelocations(void *);
/*
* object to name lookup routines
*/
char * _LoaderHandleToName(int handle);
char * _LoaderHandleToCanonicalName(int handle);
/*
* Entry points for the different loader types
*/
#include "aoutloader.h"
#include "coffloader.h"
#include "elfloader.h"
#include "dlloader.h"
/* LD_ARCHIVE */
void *ARCHIVELoadModule(loaderPtr, int, LOOKUP **);
extern void _loader_debug_state(void);
#endif /* _LOADER_H */
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