From 9508a382f8a9f241dab097d921b6d290c1c3a776 Mon Sep 17 00:00:00 2001
From: Kaleb Keithley <kaleb@freedesktop.org>
Date: Fri, 14 Nov 2003 16:48:57 +0000
Subject: Initial revision

---
 hw/xfree86/loader/loader.h | 269 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 269 insertions(+)
 create mode 100644 hw/xfree86/loader/loader.h

(limited to 'hw/xfree86/loader/loader.h')

diff --git a/hw/xfree86/loader/loader.h b/hw/xfree86/loader/loader.h
new file mode 100644
index 000000000..a814544b8
--- /dev/null
+++ b/hw/xfree86/loader/loader.h
@@ -0,0 +1,269 @@
+/* $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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