Initial import.

1 files changed, 1030 insertions, 0 deletions

diff --git a/src/mesa/glapi/glapi.c b/src/mesa/glapi/glapi.c
new file mode 100644
index 0000000..8bc185c
--- /dev/null
+++ b/src/mesa/glapi/glapi.c
@@ -0,0 +1,1030 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  6.3
+ *
+ * Copyright (C) 1999-2003  Brian Paul   All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+/*
+ * This file manages the OpenGL API dispatch layer.
+ * The dispatch table (struct _glapi_table) is basically just a list
+ * of function pointers.
+ * There are functions to set/get the current dispatch table for the
+ * current thread and to manage registration/dispatch of dynamically
+ * added extension functions.
+ *
+ * It's intended that this file and the other glapi*.[ch] files are
+ * flexible enough to be reused in several places:  XFree86, DRI-
+ * based libGL.so, and perhaps the SGI SI.
+ *
+ * NOTE: There are no dependencies on Mesa in this code.
+ *
+ * Versions (API changes):
+ *   2000/02/23  - original version for Mesa 3.3 and XFree86 4.0
+ *   2001/01/16  - added dispatch override feature for Mesa 3.5
+ *   2002/06/28  - added _glapi_set_warning_func(), Mesa 4.1.
+ *   2002/10/01  - _glapi_get_proc_address() will now generate new entrypoints
+ *                 itself (using offset ~0).  _glapi_add_entrypoint() can be
+ *                 called afterward and it'll fill in the correct dispatch
+ *                 offset.  This allows DRI libGL to avoid probing for DRI
+ *                 drivers!  No changes to the public glapi interface.
+ */
+
+
+
+#include "glheader.h"
+#include "glapi.h"
+#include "glapioffsets.h"
+#include "glapitable.h"
+#include "glthread.h"
+
+/***** BEGIN NO-OP DISPATCH *****/
+
+static GLboolean WarnFlag = GL_FALSE;
+static _glapi_warning_func warning_func;
+
+
+/*
+ * Enable/disable printing of warning messages.
+ */
+void
+_glapi_noop_enable_warnings(GLboolean enable)
+{
+   WarnFlag = enable;
+}
+
+/*
+ * Register a callback function for reporting errors.
+ */
+void
+_glapi_set_warning_func( _glapi_warning_func func )
+{
+   warning_func = func;
+}
+
+static GLboolean
+warn(void)
+{
+   if ((WarnFlag || getenv("MESA_DEBUG") || getenv("LIBGL_DEBUG"))
+       && warning_func) {
+      return GL_TRUE;
+   }
+   else {
+      return GL_FALSE;
+   }
+}
+
+
+#define KEYWORD1 static
+#define KEYWORD2 GLAPIENTRY
+#define NAME(func)  NoOp##func
+
+#define F NULL
+
+#define DISPATCH(func, args, msg)					      \
+   if (warn()) {							      \
+      warning_func(NULL, "GL User Error: called without context: %s", #func); \
+   }
+
+#define RETURN_DISPATCH(func, args, msg)				      \
+   if (warn()) {							      \
+      warning_func(NULL, "GL User Error: called without context: %s", #func); \
+   }									      \
+   return 0
+
+#define DISPATCH_TABLE_NAME __glapi_noop_table
+#define UNUSED_TABLE_NAME __unused_noop_functions
+
+#define TABLE_ENTRY(name) (_glapi_proc) NoOp##name
+
+static GLint NoOpUnused(void)
+{
+   if (warn()) {
+      warning_func(NULL, "GL User Error: calling extension function without a current context\n");
+   }
+   return 0;
+}
+
+#include "glapitemp.h"
+
+/***** END NO-OP DISPATCH *****/
+
+
+
+/***** BEGIN THREAD-SAFE DISPATCH *****/
+
+#if defined(THREADS)
+
+/**
+ * \name Multi-threaded control support variables
+ *
+ * If thread-safety is supported, there are two potential mechanisms that can
+ * be used.  The old-style mechanism would set \c _glapi_Dispatch to a special
+ * thread-safe dispatch table.  These dispatch routines would call
+ * \c _glapi_get_dispatch to get the actual dispatch pointer.  In this
+ * setup \c _glapi_Dispatch could never be \c NULL.  This dual layered
+ * dispatch setup performed great for single-threaded apps, but didn't
+ * perform well for multithreaded apps.
+ *
+ * In the new mechansim, there are two variables.  The first is
+ * \c _glapi_DispatchTSD.  In the single-threaded case, this variable points
+ * to the dispatch table.  In the multi-threaded case, this variable is
+ * \c NULL, and thread-specific variable \c _gl_DispatchTSD points to the
+ * actual dispatch table.  \c _glapi_DispatchTSD is used to signal to the
+ * static dispatch functions to call \c _glapi_get_dispatch to get the real
+ * dispatch table.
+ * 
+ * There is a race condition in setting \c _glapi_DispatchTSD to \c NULL.
+ * It is possible for the original thread to be setting it at the same instant
+ * a new thread, perhaps running on a different processor, is clearing it.
+ * Because of that, \c ThreadSafe, which can only ever be changed to
+ * \c GL_TRUE, is used to determine whether or not the application is
+ * multithreaded.
+ */
+/*@{*/
+static GLboolean ThreadSafe = GL_FALSE;  /**< In thread-safe mode? */
+_glthread_TSD _gl_DispatchTSD;           /**< Per-thread dispatch pointer */
+static _glthread_TSD RealDispatchTSD;    /**< only when using override */
+static _glthread_TSD ContextTSD;         /**< Per-thread context pointer */
+/*@}*/
+
+
+#define DISPATCH_TABLE_NAME __glapi_threadsafe_table
+#define UNUSED_TABLE_NAME __unused_threadsafe_functions
+
+#define TABLE_ENTRY(name) (_glapi_proc) gl##name
+
+static GLint glUnused(void)
+{
+   return 0;
+}
+
+#include "glapitemp.h"
+
+#endif
+
+/***** END THREAD-SAFE DISPATCH *****/
+
+
+
+struct _glapi_table *_glapi_Dispatch = (struct _glapi_table *) __glapi_noop_table;
+#if defined( THREADS )
+struct _glapi_table *_glapi_DispatchTSD = (struct _glapi_table *) __glapi_noop_table;
+#endif
+struct _glapi_table *_glapi_RealDispatch = (struct _glapi_table *) __glapi_noop_table;
+
+
+/* Used when thread safety disabled */
+void *_glapi_Context = NULL;
+
+
+static GLboolean DispatchOverride = GL_FALSE;
+
+
+
+/**
+ * strdup() is actually not a standard ANSI C or POSIX routine.
+ * Irix will not define it if ANSI mode is in effect.
+ */
+static char *
+str_dup(const char *str)
+{
+   char *copy;
+   copy = (char*) malloc(strlen(str) + 1);
+   if (!copy)
+      return NULL;
+   strcpy(copy, str);
+   return copy;
+}
+
+
+
+/**
+ * We should call this periodically from a function such as glXMakeCurrent
+ * in order to test if multiple threads are being used.
+ */
+void
+_glapi_check_multithread(void)
+{
+#if defined(THREADS)
+   if (!ThreadSafe) {
+      static unsigned long knownID;
+      static GLboolean firstCall = GL_TRUE;
+      if (firstCall) {
+         knownID = _glthread_GetID();
+         firstCall = GL_FALSE;
+      }
+      else if (knownID != _glthread_GetID()) {
+         ThreadSafe = GL_TRUE;
+         _glapi_set_dispatch(NULL);
+      }
+   }
+   else if (!_glapi_get_dispatch()) {
+      /* make sure that this thread's dispatch pointer isn't null */
+      _glapi_set_dispatch(NULL);
+   }
+#endif
+}
+
+
+
+/**
+ * Set the current context pointer for this thread.
+ * The context pointer is an opaque type which should be cast to
+ * void from the real context pointer type.
+ */
+void
+_glapi_set_context(void *context)
+{
+   (void) __unused_noop_functions; /* silence a warning */
+#if defined(THREADS)
+   (void) __unused_threadsafe_functions; /* silence a warning */
+   _glthread_SetTSD(&ContextTSD, context);
+   _glapi_Context = (ThreadSafe) ? NULL : context;
+#else
+   _glapi_Context = context;
+#endif
+}
+
+
+
+/**
+ * Get the current context pointer for this thread.
+ * The context pointer is an opaque type which should be cast from
+ * void to the real context pointer type.
+ */
+void *
+_glapi_get_context(void)
+{
+#if defined(THREADS)
+   if (ThreadSafe) {
+      return _glthread_GetTSD(&ContextTSD);
+   }
+   else {
+      return _glapi_Context;
+   }
+#else
+   return _glapi_Context;
+#endif
+}
+
+
+
+/**
+ * Set the global or per-thread dispatch table pointer.
+ */
+void
+_glapi_set_dispatch(struct _glapi_table *dispatch)
+{
+   if (!dispatch) {
+      /* use the no-op functions */
+      dispatch = (struct _glapi_table *) __glapi_noop_table;
+   }
+#ifdef DEBUG
+   else {
+      _glapi_check_table(dispatch);
+   }
+#endif
+
+#if defined(THREADS)
+   if (DispatchOverride) {
+      _glthread_SetTSD(&RealDispatchTSD, (void *) dispatch);
+      if (ThreadSafe)
+         _glapi_RealDispatch = (struct _glapi_table*) __glapi_threadsafe_table;
+      else
+         _glapi_RealDispatch = dispatch;
+   }
+   else {
+      /* normal operation */
+      _glthread_SetTSD(&_gl_DispatchTSD, (void *) dispatch);
+      if (ThreadSafe) {
+	 _glapi_Dispatch = (struct _glapi_table *) __glapi_threadsafe_table;
+	 _glapi_DispatchTSD = NULL;
+      }
+      else {
+	 _glapi_Dispatch = dispatch;
+	 _glapi_DispatchTSD = dispatch;
+      }
+   }
+#else /*THREADS*/
+   if (DispatchOverride) {
+      _glapi_RealDispatch = dispatch;
+   }
+   else {
+      _glapi_Dispatch = dispatch;
+   }
+#endif /*THREADS*/
+}
+
+
+
+/**
+ * Return pointer to current dispatch table for calling thread.
+ */
+struct _glapi_table *
+_glapi_get_dispatch(void)
+{
+#if defined(THREADS)
+   if (ThreadSafe) {
+      if (DispatchOverride) {
+         return (struct _glapi_table *) _glthread_GetTSD(&RealDispatchTSD);
+      }
+      else {
+         return (struct _glapi_table *) _glthread_GetTSD(&_gl_DispatchTSD);
+      }
+   }
+   else {
+      if (DispatchOverride) {
+         assert(_glapi_RealDispatch);
+         return _glapi_RealDispatch;
+      }
+      else {
+         assert(_glapi_DispatchTSD);
+         return _glapi_DispatchTSD;
+      }
+   }
+#else
+   return _glapi_Dispatch;
+#endif
+}
+
+
+/*
+ * Notes on dispatch overrride:
+ *
+ * Dispatch override allows an external agent to hook into the GL dispatch
+ * mechanism before execution goes into the core rendering library.  For
+ * example, a trace mechanism would insert itself as an overrider, print
+ * logging info for each GL function, then dispatch to the real GL function.
+ *
+ * libGLS (GL Stream library) is another agent that might use override.
+ *
+ * We don't allow more than one layer of overriding at this time.
+ * In the future we may allow nested/layered override.  In that case
+ * _glapi_begin_dispatch_override() will return an override layer,
+ * _glapi_end_dispatch_override(layer) will remove an override layer
+ * and _glapi_get_override_dispatch(layer) will return the dispatch
+ * table for a given override layer.  layer = 0 will be the "real"
+ * dispatch table.
+ */
+
+/*
+ * Return: dispatch override layer number.
+ */
+int
+_glapi_begin_dispatch_override(struct _glapi_table *override)
+{
+   struct _glapi_table *real = _glapi_get_dispatch();
+
+   assert(!DispatchOverride);  /* can't nest at this time */
+   DispatchOverride = GL_TRUE;
+
+   _glapi_set_dispatch(real);
+
+#if defined(THREADS)
+   _glthread_SetTSD(&_gl_DispatchTSD, (void *) override);
+   if ( ThreadSafe ) {
+      _glapi_Dispatch = (struct _glapi_table *) __glapi_threadsafe_table;
+      _glapi_DispatchTSD = NULL;
+   }
+   else {
+      _glapi_Dispatch = override;
+      _glapi_DispatchTSD = override;
+   }
+#else
+   _glapi_Dispatch = override;
+#endif
+   return 1;
+}
+
+
+void
+_glapi_end_dispatch_override(int layer)
+{
+   struct _glapi_table *real = _glapi_get_dispatch();
+   (void) layer;
+   DispatchOverride = GL_FALSE;
+   _glapi_set_dispatch(real);
+   /* the rest of this isn't needed, just play it safe */
+#if defined(THREADS)
+   _glthread_SetTSD(&RealDispatchTSD, NULL);
+#endif
+   _glapi_RealDispatch = NULL;
+}
+
+
+struct _glapi_table *
+_glapi_get_override_dispatch(int layer)
+{
+   if (layer == 0) {
+      return _glapi_get_dispatch();
+   }
+   else {
+      if (DispatchOverride) {
+#if defined(THREADS)
+         return (struct _glapi_table *) _glthread_GetTSD(&_gl_DispatchTSD);
+#else
+         return _glapi_Dispatch;
+#endif
+      }
+      else {
+         return NULL;
+      }
+   }
+}
+
+
+#if !defined( USE_X86_ASM )
+#define NEED_FUNCTION_POINTER
+#endif
+
+/* The code in this file is auto-generated with Python */
+#include "glprocs.h"
+
+
+/**
+ * Search the table of static entrypoint functions for the named function
+ * and return the corresponding glprocs_table_t entry.
+ */
+static const glprocs_table_t *
+find_entry( const char * n )
+{
+   GLuint i;
+
+   for (i = 0; static_functions[i].Name_offset >= 0; i++) {
+      const char * test_name;
+
+      test_name = gl_string_table + static_functions[i].Name_offset;
+      if (strcmp(test_name, n) == 0) {
+	 return & static_functions[i];
+      }
+   }
+   return NULL;
+}
+
+
+/**
+ * Return dispatch table offset of the named static (built-in) function.
+ * Return -1 if function not found.
+ */
+static GLint
+get_static_proc_offset(const char *funcName)
+{
+   const glprocs_table_t * const f = find_entry( funcName );
+
+   if ( f != NULL ) {
+      return f->Offset;
+   }
+   return -1;
+}
+
+
+#ifdef USE_X86_ASM
+extern const GLubyte gl_dispatch_functions_start[];
+
+# if defined(THREADS)
+#  define X86_DISPATCH_FUNCTION_SIZE  32
+# else
+#  define X86_DISPATCH_FUNCTION_SIZE  16
+# endif
+
+
+/**
+ * Return dispatch function address the named static (built-in) function.
+ * Return NULL if function not found.
+ */
+static const _glapi_proc
+get_static_proc_address(const char *funcName)
+{
+   const glprocs_table_t * const f = find_entry( funcName );
+
+   if ( f != NULL ) {
+      return (_glapi_proc) (gl_dispatch_functions_start 
+                            + (X86_DISPATCH_FUNCTION_SIZE * f->Offset));
+   }
+   else {
+      return NULL;
+   }
+}
+
+#else
+
+
+/**
+ * Return pointer to the named static (built-in) function.
+ * \return  NULL if function not found.
+ */
+static const _glapi_proc
+get_static_proc_address(const char *funcName)
+{
+   const glprocs_table_t * const f = find_entry( funcName );
+   return ( f != NULL ) ? f->Address : NULL;
+}
+
+#endif /* USE_X86_ASM */
+
+
+/**
+ * Return the name of the function at the given offset in the dispatch
+ * table.  For debugging only.
+ */
+static const char *
+get_static_proc_name( GLuint offset )
+{
+   GLuint i;
+
+   for (i = 0; static_functions[i].Name_offset >= 0; i++) {
+      if (static_functions[i].Offset == offset) {
+	 return gl_string_table + static_functions[i].Name_offset;
+      }
+   }
+   return NULL;
+}
+
+
+
+/**********************************************************************
+ * Extension function management.
+ */
+
+/*
+ * Number of extension functions which we can dynamically add at runtime.
+ */
+#define MAX_EXTENSION_FUNCS 300
+
+
+/*
+ * The dispatch table size (number of entries) is the size of the
+ * _glapi_table struct plus the number of dynamic entries we can add.
+ * The extra slots can be filled in by DRI drivers that register new extension
+ * functions.
+ */
+#define DISPATCH_TABLE_SIZE (sizeof(struct _glapi_table) / sizeof(void *) + MAX_EXTENSION_FUNCS)
+
+
+struct name_address_offset {
+   const char *Name;
+   _glapi_proc Address;
+   GLuint Offset;
+};
+
+
+static struct name_address_offset ExtEntryTable[MAX_EXTENSION_FUNCS];
+static GLuint NumExtEntryPoints = 0;
+
+#ifdef USE_SPARC_ASM
+extern void __glapi_sparc_icache_flush(unsigned int *);
+#endif
+
+/**
+ * Generate a dispatch function (entrypoint) which jumps through
+ * the given slot number (offset) in the current dispatch table.
+ * We need assembly language in order to accomplish this.
+ */
+static _glapi_proc
+generate_entrypoint(GLuint functionOffset)
+{
+#if defined(USE_X86_ASM)
+   /*
+    * This x86 code contributed by Josh Vanderhoof.
+    *
+    *  0:   a1 10 32 54 76          movl   __glapi_Dispatch,%eax
+    *       00 01 02 03 04
+    *  5:   85 c0                   testl  %eax,%eax
+    *       05 06
+    *  7:   74 06                   je     f <entrypoint+0xf>
+    *       07 08
+    *  9:   ff a0 10 32 54 76       jmp    *0x76543210(%eax)
+    *       09 0a 0b 0c 0d 0e
+    *  f:   e8 fc ff ff ff          call   __glapi_get_dispatch
+    *       0f 10 11 12 13
+    * 14:   ff a0 10 32 54 76       jmp    *0x76543210(%eax)
+    *       14 15 16 17 18 19
+    */
+   static const unsigned char insn_template[] = {
+      0xa1, 0x00, 0x00, 0x00, 0x00,
+      0x85, 0xc0,
+      0x74, 0x06,
+      0xff, 0xa0, 0x00, 0x00, 0x00, 0x00,
+      0xe8, 0x00, 0x00, 0x00, 0x00,
+      0xff, 0xa0, 0x00, 0x00, 0x00, 0x00
+   };
+   unsigned char *code = (unsigned char *) malloc(sizeof(insn_template));
+   unsigned int next_insn;
+   if (code) {
+      memcpy(code, insn_template, sizeof(insn_template));
+
+#if defined( THREADS )
+      *(unsigned int *)(code + 0x01) = (unsigned int)&_glapi_DispatchTSD;
+#else
+      *(unsigned int *)(code + 0x01) = (unsigned int)&_glapi_Dispatch;
+#endif
+      *(unsigned int *)(code + 0x0b) = (unsigned int)functionOffset * 4;
+      next_insn = (unsigned int)(code + 0x14);
+      *(unsigned int *)(code + 0x10) = (unsigned int)_glapi_get_dispatch - next_insn;
+      *(unsigned int *)(code + 0x16) = (unsigned int)functionOffset * 4;
+   }
+   return (_glapi_proc) code;
+#elif defined(USE_SPARC_ASM)
+
+#if (defined(__sparc_v9__) && (!defined(__linux__) || defined(__linux_sparc_64__)))
+   static const unsigned int insn_template[] = {
+	   0x05000000,	/* sethi	%uhi(_glapi_Dispatch), %g2	*/
+	   0x03000000,	/* sethi	%hi(_glapi_Dispatch), %g1	*/
+	   0x8410a000,	/* or		%g2, %ulo(_glapi_Dispatch), %g2	*/
+	   0x82106000,	/* or		%g1, %lo(_glapi_Dispatch), %g1	*/
+	   0x8528b020,	/* sllx		%g2, 32, %g2			*/
+	   0xc2584002,	/* ldx		[%g1 + %g2], %g1		*/
+	   0x05000000,	/* sethi	%hi(8 * glapioffset), %g2	*/
+	   0x8410a000,	/* or		%g2, %lo(8 * glapioffset), %g2	*/
+	   0xc6584002,	/* ldx		[%g1 + %g2], %g3		*/
+	   0x81c0c000,	/* jmpl		%g3, %g0			*/
+	   0x01000000	/*  nop						*/
+   };
+#else
+   static const unsigned int insn_template[] = {
+	   0x03000000,	/* sethi	%hi(_glapi_Dispatch), %g1	  */
+	   0xc2006000,	/* ld		[%g1 + %lo(_glapi_Dispatch)], %g1 */
+	   0xc6006000,	/* ld		[%g1 + %lo(4*glapioffset)], %g3	  */
+	   0x81c0c000,	/* jmpl		%g3, %g0			  */
+	   0x01000000	/*  nop						  */
+   };
+#endif
+   unsigned int *code = (unsigned int *) malloc(sizeof(insn_template));
+   unsigned long glapi_addr = (unsigned long) &_glapi_Dispatch;
+   if (code) {
+      memcpy(code, insn_template, sizeof(insn_template));
+
+#if (defined(__sparc_v9__) && (!defined(__linux__) || defined(__linux_sparc_64__)))
+      code[0] |= (glapi_addr >> (32 + 10));
+      code[1] |= ((glapi_addr & 0xffffffff) >> 10);
+      __glapi_sparc_icache_flush(&code[0]);
+      code[2] |= ((glapi_addr >> 32) & ((1 << 10) - 1));
+      code[3] |= (glapi_addr & ((1 << 10) - 1));
+      __glapi_sparc_icache_flush(&code[2]);
+      code[6] |= ((functionOffset * 8) >> 10);
+      code[7] |= ((functionOffset * 8) & ((1 << 10) - 1));
+      __glapi_sparc_icache_flush(&code[6]);
+#else
+      code[0] |= (glapi_addr >> 10);
+      code[1] |= (glapi_addr & ((1 << 10) - 1));
+      __glapi_sparc_icache_flush(&code[0]);
+      code[2] |= (functionOffset * 4);
+      __glapi_sparc_icache_flush(&code[2]);
+#endif
+   }
+   return (_glapi_proc) code;
+#else
+   (void) functionOffset;
+   return NULL;
+#endif /* USE_*_ASM */
+}
+
+
+/**
+ * This function inserts a new dispatch offset into the assembly language
+ * stub that was generated with the preceeding function.
+ */
+static void
+fill_in_entrypoint_offset(_glapi_proc entrypoint, GLuint offset)
+{
+#if defined(USE_X86_ASM)
+
+   unsigned char *code = (unsigned char *) entrypoint;
+   *(unsigned int *)(code + 0x0b) = offset * 4;
+   *(unsigned int *)(code + 0x16) = offset * 4;
+
+#elif defined(USE_SPARC_ASM)
+
+   /* XXX this hasn't been tested! */
+   unsigned int *code = (unsigned int *) entrypoint;
+#if (defined(__sparc_v9__) && (!defined(__linux__) || defined(__linux_sparc_64__)))
+   code[6] = 0x05000000;  /* sethi	%hi(8 * glapioffset), %g2	*/
+   code[7] = 0x8410a000;  /* or		%g2, %lo(8 * glapioffset), %g2	*/
+   code[6] |= ((offset * 8) >> 10);
+   code[7] |= ((offset * 8) & ((1 << 10) - 1));
+   __glapi_sparc_icache_flush(&code[6]);
+#else /* __sparc_v9__ && !linux */
+   code[2] = 0xc6006000;  /* ld		[%g1 + %lo(4*glapioffset)], %g3	  */
+   code[2] |= (offset * 4);
+   __glapi_sparc_icache_flush(&code[2]);
+#endif /* __sparc_v9__ && !linux */
+
+#else
+
+   /* an unimplemented architecture */
+   (void) entrypoint;
+   (void) offset;
+
+#endif /* USE_*_ASM */
+}
+
+
+/**
+ * Add a new extension function entrypoint.
+ * Return: GL_TRUE = success or GL_FALSE = failure
+ */
+GLboolean
+_glapi_add_entrypoint(const char *funcName, GLuint offset)
+{
+   /* trivial rejection test */
+#ifdef MANGLE
+   if (!funcName || funcName[0] != 'm' || funcName[1] != 'g' || funcName[2] != 'l')
+      return GL_FALSE;
+#else
+   if (!funcName || funcName[0] != 'g' || funcName[1] != 'l')
+      return GL_FALSE;
+#endif
+
+   /* first check if the named function is already statically present */
+   {
+      GLint index = get_static_proc_offset(funcName);
+      if (index >= 0) {
+         return (GLboolean) ((GLuint) index == offset);  /* bad offset! */
+      }
+   }
+
+   /* See if this function has already been dynamically added */
+   {
+      GLuint i;
+      for (i = 0; i < NumExtEntryPoints; i++) {
+         if (strcmp(ExtEntryTable[i].Name, funcName) == 0) {
+            /* function already registered */
+            if (ExtEntryTable[i].Offset == offset) {
+               return GL_TRUE;  /* offsets match */
+            }
+            else if (ExtEntryTable[i].Offset == (GLuint) ~0
+                     && offset < DISPATCH_TABLE_SIZE) {
+               /* need to patch-up the dispatch code */
+               if (offset != (GLuint) ~0) {
+                  fill_in_entrypoint_offset(ExtEntryTable[i].Address, offset);
+                  ExtEntryTable[i].Offset = offset;
+               }
+               return GL_TRUE;
+            }
+            else {
+               return GL_FALSE;  /* bad offset! */
+            }
+         }
+      }
+   }
+
+   /* This is a new function, try to add it.  */
+   if (NumExtEntryPoints >= MAX_EXTENSION_FUNCS ||
+       offset >= DISPATCH_TABLE_SIZE) {
+      /* No space left */
+      return GL_FALSE;
+   }
+   else {
+      _glapi_proc entrypoint = generate_entrypoint(offset);
+      if (!entrypoint)
+         return GL_FALSE; /* couldn't generate assembly */
+
+      /* OK! */
+      ExtEntryTable[NumExtEntryPoints].Name = str_dup(funcName);
+      ExtEntryTable[NumExtEntryPoints].Offset = offset;
+      ExtEntryTable[NumExtEntryPoints].Address = entrypoint;
+      NumExtEntryPoints++;
+
+      return GL_TRUE;  /* success */
+   }
+
+   /* should never get here, silence compiler warnings */
+   return GL_FALSE;
+}
+
+
+/**
+ * Return offset of entrypoint for named function within dispatch table.
+ */
+GLint
+_glapi_get_proc_offset(const char *funcName)
+{
+   /* search extension functions first */
+   GLuint i;
+   for (i = 0; i < NumExtEntryPoints; i++) {
+      if (strcmp(ExtEntryTable[i].Name, funcName) == 0) {
+         return ExtEntryTable[i].Offset;
+      }
+   }
+
+   /* search static functions */
+   return get_static_proc_offset(funcName);
+}
+
+
+
+/**
+ * Return pointer to the named function.  If the function name isn't found
+ * in the name of static functions, try generating a new API entrypoint on
+ * the fly with assembly language.
+ */
+_glapi_proc
+_glapi_get_proc_address(const char *funcName)
+{
+   GLuint i;
+
+#ifdef MANGLE
+   if (funcName[0] != 'm' || funcName[1] != 'g' || funcName[2] != 'l')
+      return NULL;
+#else
+   if (funcName[0] != 'g' || funcName[1] != 'l')
+      return NULL;
+#endif
+
+   /* search extension functions first */
+   for (i = 0; i < NumExtEntryPoints; i++) {
+      if (strcmp(ExtEntryTable[i].Name, funcName) == 0) {
+         return ExtEntryTable[i].Address;
+      }
+   }
+
+   /* search static functions */
+   {
+      const _glapi_proc func = get_static_proc_address(funcName);
+      if (func)
+         return func;
+   }
+
+   /* generate new entrypoint - use a temporary dispatch offset of
+    * ~0 (i.e. -1).  Later, when the driver calls _glapi_add_entrypoint()
+    * we'll put in the proper offset.  If that never happens, and the
+    * user calls this function, he'll segfault.  That's what you get
+    * when you try calling a GL function that doesn't really exist.
+    */
+   if (NumExtEntryPoints < MAX_EXTENSION_FUNCS) {
+      _glapi_proc entrypoint = generate_entrypoint(~0);
+      if (!entrypoint)
+         return GL_FALSE;
+
+      ExtEntryTable[NumExtEntryPoints].Name = str_dup(funcName);
+      ExtEntryTable[NumExtEntryPoints].Offset = ~0;
+      ExtEntryTable[NumExtEntryPoints].Address = entrypoint;
+      NumExtEntryPoints++;
+
+      return entrypoint;
+   }
+   else {
+      /* no space for new functions! */
+      return NULL;
+   }
+}
+
+
+
+/**
+ * Return the name of the function at the given dispatch offset.
+ * This is only intended for debugging.
+ */
+const char *
+_glapi_get_proc_name(GLuint offset)
+{
+   GLuint i;
+   const char * n;
+
+   /* search built-in functions */
+   n = get_static_proc_name(offset);
+   if ( n != NULL ) {
+      return n;
+   }
+
+   /* search added extension functions */
+   for (i = 0; i < NumExtEntryPoints; i++) {
+      if (ExtEntryTable[i].Offset == offset) {
+         return ExtEntryTable[i].Name;
+      }
+   }
+   return NULL;
+}
+
+
+
+/**
+ * Return size of dispatch table struct as number of functions (or
+ * slots).
+ */
+GLuint
+_glapi_get_dispatch_table_size(void)
+{
+   return DISPATCH_TABLE_SIZE;
+}
+
+
+
+/**
+ * Get API dispatcher version string.
+ */
+const char *
+_glapi_get_version(void)
+{
+   return "20021001";  /* YYYYMMDD */
+}
+
+
+
+/**
+ * Make sure there are no NULL pointers in the given dispatch table.
+ * Intended for debugging purposes.
+ */
+void
+_glapi_check_table(const struct _glapi_table *table)
+{
+#ifdef DEBUG
+   const GLuint entries = _glapi_get_dispatch_table_size();
+   const void **tab = (const void **) table;
+   GLuint i;
+   for (i = 1; i < entries; i++) {
+      assert(tab[i]);
+   }
+
+   /* Do some spot checks to be sure that the dispatch table
+    * slots are assigned correctly.
+    */
+   {
+      GLuint BeginOffset = _glapi_get_proc_offset("glBegin");
+      char *BeginFunc = (char*) &table->Begin;
+      GLuint offset = (BeginFunc - (char *) table) / sizeof(void *);
+      assert(BeginOffset == _gloffset_Begin);
+      assert(BeginOffset == offset);
+   }
+   {
+      GLuint viewportOffset = _glapi_get_proc_offset("glViewport");
+      char *viewportFunc = (char*) &table->Viewport;
+      GLuint offset = (viewportFunc - (char *) table) / sizeof(void *);
+      assert(viewportOffset == _gloffset_Viewport);
+      assert(viewportOffset == offset);
+   }
+   {
+      GLuint VertexPointerOffset = _glapi_get_proc_offset("glVertexPointer");
+      char *VertexPointerFunc = (char*) &table->VertexPointer;
+      GLuint offset = (VertexPointerFunc - (char *) table) / sizeof(void *);
+      assert(VertexPointerOffset == _gloffset_VertexPointer);
+      assert(VertexPointerOffset == offset);
+   }
+   {
+      GLuint ResetMinMaxOffset = _glapi_get_proc_offset("glResetMinmax");
+      char *ResetMinMaxFunc = (char*) &table->ResetMinmax;
+      GLuint offset = (ResetMinMaxFunc - (char *) table) / sizeof(void *);
+      assert(ResetMinMaxOffset == _gloffset_ResetMinmax);
+      assert(ResetMinMaxOffset == offset);
+   }
+   {
+      GLuint blendColorOffset = _glapi_get_proc_offset("glBlendColor");
+      char *blendColorFunc = (char*) &table->BlendColor;
+      GLuint offset = (blendColorFunc - (char *) table) / sizeof(void *);
+      assert(blendColorOffset == _gloffset_BlendColor);
+      assert(blendColorOffset == offset);
+   }
+   {
+      GLuint istextureOffset = _glapi_get_proc_offset("glIsTextureEXT");
+      char *istextureFunc = (char*) &table->IsTextureEXT;
+      GLuint offset = (istextureFunc - (char *) table) / sizeof(void *);
+      assert(istextureOffset == _gloffset_IsTextureEXT);
+      assert(istextureOffset == offset);
+   }
+   {
+      GLuint secondaryColor3fOffset = _glapi_get_proc_offset("glSecondaryColor3fEXT");
+      char *secondaryColor3fFunc = (char*) &table->SecondaryColor3fEXT;
+      GLuint offset = (secondaryColor3fFunc - (char *) table) / sizeof(void *);
+      assert(secondaryColor3fOffset == _gloffset_SecondaryColor3fEXT);
+      assert(secondaryColor3fOffset == offset);
+      assert(_glapi_get_proc_address("glSecondaryColor3fEXT") == (_glapi_proc) &glSecondaryColor3fEXT);
+   }
+   {
+      GLuint pointParameterivOffset = _glapi_get_proc_offset("glPointParameterivNV");
+      char *pointParameterivFunc = (char*) &table->PointParameterivNV;
+      GLuint offset = (pointParameterivFunc - (char *) table) / sizeof(void *);
+      assert(pointParameterivOffset == _gloffset_PointParameterivNV);
+      assert(pointParameterivOffset == offset);
+      assert(_glapi_get_proc_address("glPointParameterivNV") == (_glapi_proc) &glPointParameterivNV);
+   }
+   {
+      GLuint setFenceOffset = _glapi_get_proc_offset("glSetFenceNV");
+      char *setFenceFunc = (char*) &table->SetFenceNV;
+      GLuint offset = (setFenceFunc - (char *) table) / sizeof(void *);
+      assert(setFenceOffset == _gloffset_SetFenceNV);
+      assert(setFenceOffset == offset);
+      assert(_glapi_get_proc_address("glSetFenceNV") == (_glapi_proc) &glSetFenceNV);
+   }
+#else
+   (void) table;
+#endif
+}