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authormarha <marha@users.sourceforge.net>2010-11-22 18:56:42 +0000
committermarha <marha@users.sourceforge.net>2010-11-22 18:56:42 +0000
commit94810d19989336862251dbf69c3f3acb18a9b06d (patch)
tree1d228dbd09f6f2aeb5dac038f72c4b509c9b8440 /mesalib/src/mapi/glapi/glapi_getproc.c
parent29a143db381d7c9c632b61b9f336acf936df4972 (diff)
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Preperation for new release of mesa
Diffstat (limited to 'mesalib/src/mapi/glapi/glapi_getproc.c')
-rw-r--r--mesalib/src/mapi/glapi/glapi_getproc.c836
1 files changed, 836 insertions, 0 deletions
diff --git a/mesalib/src/mapi/glapi/glapi_getproc.c b/mesalib/src/mapi/glapi/glapi_getproc.c
new file mode 100644
index 000000000..a6dbf173e
--- /dev/null
+++ b/mesalib/src/mapi/glapi/glapi_getproc.c
@@ -0,0 +1,836 @@
+/*
+ * Mesa 3-D graphics library
+ * Version: 7.1
+ *
+ * Copyright (C) 1999-2008 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.
+ */
+
+/**
+ * \file glapi_getproc.c
+ *
+ * Code for implementing glXGetProcAddress(), etc.
+ * This was originally in glapi.c but refactored out.
+ */
+
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#include "glapi/mesa.h"
+#else
+#include "main/glheader.h"
+#include "main/compiler.h"
+#endif
+
+#include "glapi/glapi.h"
+#include "glapi/glapioffsets.h"
+#include "glapi/glapitable.h"
+
+
+#if defined(USE_X64_64_ASM) && defined(GLX_USE_TLS)
+# define DISPATCH_FUNCTION_SIZE 16
+#elif defined(USE_X86_ASM)
+# if defined(THREADS) && !defined(GLX_USE_TLS)
+# define DISPATCH_FUNCTION_SIZE 32
+# else
+# define DISPATCH_FUNCTION_SIZE 16
+# endif
+#endif
+
+#if !defined(DISPATCH_FUNCTION_SIZE) && !defined(XFree86Server) && !defined(XGLServer)
+# define NEED_FUNCTION_POINTER
+#endif
+
+/* The code in this file is auto-generated with Python */
+#include "glapi/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 *testName = gl_string_table + static_functions[i].Name_offset;
+#ifdef MANGLE
+ /* skip the "m" prefix on the name */
+ if (strcmp(testName, n + 1) == 0)
+#else
+ if (strcmp(testName, n) == 0)
+#endif
+ {
+ 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) {
+ return f->Offset;
+ }
+ return -1;
+}
+
+
+#ifdef USE_X86_ASM
+
+#if defined( GLX_USE_TLS )
+extern GLubyte gl_dispatch_functions_start[];
+extern GLubyte gl_dispatch_functions_end[];
+#else
+extern const GLubyte gl_dispatch_functions_start[];
+#endif
+
+#endif /* USE_X86_ASM */
+
+
+#if !defined(XFree86Server) && !defined(XGLServer)
+
+/**
+ * Return dispatch function address for the named static (built-in) function.
+ * Return NULL if function not found.
+ */
+static _glapi_proc
+get_static_proc_address(const char *funcName)
+{
+ const glprocs_table_t * const f = find_entry( funcName );
+ if (f) {
+#if defined(DISPATCH_FUNCTION_SIZE) && defined(GLX_INDIRECT_RENDERING)
+ return (f->Address == NULL)
+ ? (_glapi_proc) (gl_dispatch_functions_start
+ + (DISPATCH_FUNCTION_SIZE * f->Offset))
+ : f->Address;
+#elif defined(DISPATCH_FUNCTION_SIZE)
+ return (_glapi_proc) (gl_dispatch_functions_start
+ + (DISPATCH_FUNCTION_SIZE * f->Offset));
+#else
+ return f->Address;
+#endif
+ }
+ else {
+ return NULL;
+ }
+}
+
+#endif /* !defined(XFree86Server) && !defined(XGLServer) */
+
+
+
+/**
+ * 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;
+}
+
+
+
+#if defined(PTHREADS) || defined(GLX_USE_TLS)
+
+/**
+ * Perform platform-specific GL API entry-point fixups.
+ */
+static void
+init_glapi_relocs( void )
+{
+#if defined(USE_X86_ASM) && defined(GLX_USE_TLS) && !defined(GLX_X86_READONLY_TEXT)
+ extern unsigned long _x86_get_dispatch(void);
+ char run_time_patch[] = {
+ 0x65, 0xa1, 0, 0, 0, 0 /* movl %gs:0,%eax */
+ };
+ GLuint *offset = (GLuint *) &run_time_patch[2]; /* 32-bits for x86/32 */
+ const GLubyte * const get_disp = (const GLubyte *) run_time_patch;
+ GLubyte * curr_func = (GLubyte *) gl_dispatch_functions_start;
+
+ *offset = _x86_get_dispatch();
+ while ( curr_func != (GLubyte *) gl_dispatch_functions_end ) {
+ (void) memcpy( curr_func, get_disp, sizeof(run_time_patch));
+ curr_func += DISPATCH_FUNCTION_SIZE;
+ }
+#endif
+#ifdef USE_SPARC_ASM
+ extern void __glapi_sparc_icache_flush(unsigned int *);
+ static const unsigned int template[] = {
+#ifdef GLX_USE_TLS
+ 0x05000000, /* sethi %hi(_glapi_tls_Dispatch), %g2 */
+ 0x8730e00a, /* srl %g3, 10, %g3 */
+ 0x8410a000, /* or %g2, %lo(_glapi_tls_Dispatch), %g2 */
+#ifdef __arch64__
+ 0xc259c002, /* ldx [%g7 + %g2], %g1 */
+ 0xc2584003, /* ldx [%g1 + %g3], %g1 */
+#else
+ 0xc201c002, /* ld [%g7 + %g2], %g1 */
+ 0xc2004003, /* ld [%g1 + %g3], %g1 */
+#endif
+ 0x81c04000, /* jmp %g1 */
+ 0x01000000, /* nop */
+#else
+#ifdef __arch64__
+ 0x03000000, /* 64-bit 0x00 --> sethi %hh(_glapi_Dispatch), %g1 */
+ 0x05000000, /* 64-bit 0x04 --> sethi %lm(_glapi_Dispatch), %g2 */
+ 0x82106000, /* 64-bit 0x08 --> or %g1, %hm(_glapi_Dispatch), %g1 */
+ 0x8730e00a, /* 64-bit 0x0c --> srl %g3, 10, %g3 */
+ 0x83287020, /* 64-bit 0x10 --> sllx %g1, 32, %g1 */
+ 0x82004002, /* 64-bit 0x14 --> add %g1, %g2, %g1 */
+ 0xc2586000, /* 64-bit 0x18 --> ldx [%g1 + %lo(_glapi_Dispatch)], %g1 */
+#else
+ 0x03000000, /* 32-bit 0x00 --> sethi %hi(_glapi_Dispatch), %g1 */
+ 0x8730e00a, /* 32-bit 0x04 --> srl %g3, 10, %g3 */
+ 0xc2006000, /* 32-bit 0x08 --> ld [%g1 + %lo(_glapi_Dispatch)], %g1 */
+#endif
+ 0x80a06000, /* --> cmp %g1, 0 */
+ 0x02800005, /* --> be +4*5 */
+ 0x01000000, /* --> nop */
+#ifdef __arch64__
+ 0xc2584003, /* 64-bit --> ldx [%g1 + %g3], %g1 */
+#else
+ 0xc2004003, /* 32-bit --> ld [%g1 + %g3], %g1 */
+#endif
+ 0x81c04000, /* --> jmp %g1 */
+ 0x01000000, /* --> nop */
+#ifdef __arch64__
+ 0x9de3bf80, /* 64-bit --> save %sp, -128, %sp */
+#else
+ 0x9de3bfc0, /* 32-bit --> save %sp, -64, %sp */
+#endif
+ 0xa0100003, /* --> mov %g3, %l0 */
+ 0x40000000, /* --> call _glapi_get_dispatch */
+ 0x01000000, /* --> nop */
+ 0x82100008, /* --> mov %o0, %g1 */
+ 0x86100010, /* --> mov %l0, %g3 */
+ 0x10bffff7, /* --> ba -4*9 */
+ 0x81e80000, /* --> restore */
+#endif
+ };
+#ifdef GLX_USE_TLS
+ extern unsigned int __glapi_sparc_tls_stub;
+ extern unsigned long __glapi_sparc_get_dispatch(void);
+ unsigned int *code = &__glapi_sparc_tls_stub;
+ unsigned long dispatch = __glapi_sparc_get_dispatch();
+#else
+ extern unsigned int __glapi_sparc_pthread_stub;
+ unsigned int *code = &__glapi_sparc_pthread_stub;
+ unsigned long dispatch = (unsigned long) &_glapi_Dispatch;
+ unsigned long call_dest = (unsigned long ) &_glapi_get_dispatch;
+ int idx;
+#endif
+
+#if defined(GLX_USE_TLS)
+ code[0] = template[0] | (dispatch >> 10);
+ code[1] = template[1];
+ __glapi_sparc_icache_flush(&code[0]);
+ code[2] = template[2] | (dispatch & 0x3ff);
+ code[3] = template[3];
+ __glapi_sparc_icache_flush(&code[2]);
+ code[4] = template[4];
+ code[5] = template[5];
+ __glapi_sparc_icache_flush(&code[4]);
+ code[6] = template[6];
+ __glapi_sparc_icache_flush(&code[6]);
+#else
+#if defined(__arch64__)
+ code[0] = template[0] | (dispatch >> (32 + 10));
+ code[1] = template[1] | ((dispatch & 0xffffffff) >> 10);
+ __glapi_sparc_icache_flush(&code[0]);
+ code[2] = template[2] | ((dispatch >> 32) & 0x3ff);
+ code[3] = template[3];
+ __glapi_sparc_icache_flush(&code[2]);
+ code[4] = template[4];
+ code[5] = template[5];
+ __glapi_sparc_icache_flush(&code[4]);
+ code[6] = template[6] | (dispatch & 0x3ff);
+ idx = 7;
+#else
+ code[0] = template[0] | (dispatch >> 10);
+ code[1] = template[1];
+ __glapi_sparc_icache_flush(&code[0]);
+ code[2] = template[2] | (dispatch & 0x3ff);
+ idx = 3;
+#endif
+ code[idx + 0] = template[idx + 0];
+ __glapi_sparc_icache_flush(&code[idx - 1]);
+ code[idx + 1] = template[idx + 1];
+ code[idx + 2] = template[idx + 2];
+ __glapi_sparc_icache_flush(&code[idx + 1]);
+ code[idx + 3] = template[idx + 3];
+ code[idx + 4] = template[idx + 4];
+ __glapi_sparc_icache_flush(&code[idx + 3]);
+ code[idx + 5] = template[idx + 5];
+ code[idx + 6] = template[idx + 6];
+ __glapi_sparc_icache_flush(&code[idx + 5]);
+ code[idx + 7] = template[idx + 7];
+ code[idx + 8] = template[idx + 8] |
+ (((call_dest - ((unsigned long) &code[idx + 8]))
+ >> 2) & 0x3fffffff);
+ __glapi_sparc_icache_flush(&code[idx + 7]);
+ code[idx + 9] = template[idx + 9];
+ code[idx + 10] = template[idx + 10];
+ __glapi_sparc_icache_flush(&code[idx + 9]);
+ code[idx + 11] = template[idx + 11];
+ code[idx + 12] = template[idx + 12];
+ __glapi_sparc_icache_flush(&code[idx + 11]);
+ code[idx + 13] = template[idx + 13];
+ __glapi_sparc_icache_flush(&code[idx + 13]);
+#endif
+#endif
+}
+
+void
+init_glapi_relocs_once( void )
+{
+ static pthread_once_t once_control = PTHREAD_ONCE_INIT;
+ pthread_once( & once_control, init_glapi_relocs );
+}
+
+#else
+
+void
+init_glapi_relocs_once( void ) { }
+
+#endif /* defined(PTHREADS) || defined(GLX_USE_TLS) */
+
+
+
+/**********************************************************************
+ * Extension function management.
+ */
+
+
+/**
+ * Track information about a function added to the GL API.
+ */
+struct _glapi_function {
+ /**
+ * Name of the function.
+ */
+ const char * name;
+
+
+ /**
+ * Text string that describes the types of the parameters passed to the
+ * named function. Parameter types are converted to characters using the
+ * following rules:
+ * - 'i' for \c GLint, \c GLuint, and \c GLenum
+ * - 'p' for any pointer type
+ * - 'f' for \c GLfloat and \c GLclampf
+ * - 'd' for \c GLdouble and \c GLclampd
+ */
+ const char * parameter_signature;
+
+
+ /**
+ * Offset in the dispatch table where the pointer to the real function is
+ * located. If the driver has not requested that the named function be
+ * added to the dispatch table, this will have the value ~0.
+ */
+ unsigned dispatch_offset;
+
+
+ /**
+ * Pointer to the dispatch stub for the named function.
+ *
+ * \todo
+ * The semantic of this field should be changed slightly. Currently, it
+ * is always expected to be non-\c NULL. However, it would be better to
+ * only allocate the entry-point stub when the application requests the
+ * function via \c glXGetProcAddress. This would save memory for all the
+ * functions that the driver exports but that the application never wants
+ * to call.
+ */
+ _glapi_proc dispatch_stub;
+};
+
+
+static struct _glapi_function ExtEntryTable[MAX_EXTENSION_FUNCS];
+static GLuint NumExtEntryPoints = 0;
+
+#ifdef USE_SPARC_ASM
+extern void __glapi_sparc_icache_flush(unsigned int *);
+#endif
+
+static void
+fill_in_entrypoint_offset(_glapi_proc entrypoint, GLuint offset);
+
+/**
+ * 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)
+ /* 32 is chosen as something of a magic offset. For x86, the dispatch
+ * at offset 32 is the first one where the offset in the
+ * "jmp OFFSET*4(%eax)" can't be encoded in a single byte.
+ */
+ const GLubyte * const template_func = gl_dispatch_functions_start
+ + (DISPATCH_FUNCTION_SIZE * 32);
+ GLubyte * const code = (GLubyte *) malloc(DISPATCH_FUNCTION_SIZE);
+
+
+ if ( code != NULL ) {
+ (void) memcpy(code, template_func, DISPATCH_FUNCTION_SIZE);
+ fill_in_entrypoint_offset( (_glapi_proc) code, functionOffset );
+ }
+
+ return (_glapi_proc) code;
+#elif defined(USE_SPARC_ASM)
+
+#if defined(PTHREADS) || defined(GLX_USE_TLS)
+ static const unsigned int template[] = {
+ 0x07000000, /* sethi %hi(0), %g3 */
+ 0x8210000f, /* mov %o7, %g1 */
+ 0x40000000, /* call */
+ 0x9e100001, /* mov %g1, %o7 */
+ };
+#ifdef GLX_USE_TLS
+ extern unsigned int __glapi_sparc_tls_stub;
+ unsigned long call_dest = (unsigned long ) &__glapi_sparc_tls_stub;
+#else
+ extern unsigned int __glapi_sparc_pthread_stub;
+ unsigned long call_dest = (unsigned long ) &__glapi_sparc_pthread_stub;
+#endif
+ unsigned int *code = (unsigned int *) malloc(sizeof(template));
+ if (code) {
+ code[0] = template[0] | (functionOffset & 0x3fffff);
+ code[1] = template[1];
+ __glapi_sparc_icache_flush(&code[0]);
+ code[2] = template[2] |
+ (((call_dest - ((unsigned long) &code[2]))
+ >> 2) & 0x3fffffff);
+ code[3] = template[3];
+ __glapi_sparc_icache_flush(&code[2]);
+ }
+ return (_glapi_proc) code;
+#endif
+
+#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)
+ GLubyte * const code = (GLubyte *) entrypoint;
+
+#if DISPATCH_FUNCTION_SIZE == 32
+ *((unsigned int *)(code + 11)) = 4 * offset;
+ *((unsigned int *)(code + 22)) = 4 * offset;
+#elif DISPATCH_FUNCTION_SIZE == 16 && defined( GLX_USE_TLS )
+ *((unsigned int *)(code + 8)) = 4 * offset;
+#elif DISPATCH_FUNCTION_SIZE == 16
+ *((unsigned int *)(code + 7)) = 4 * offset;
+#else
+# error Invalid DISPATCH_FUNCTION_SIZE!
+#endif
+
+#elif defined(USE_SPARC_ASM)
+ unsigned int *code = (unsigned int *) entrypoint;
+ code[0] &= ~0x3fffff;
+ code[0] |= (offset * sizeof(void *)) & 0x3fffff;
+ __glapi_sparc_icache_flush(&code[0]);
+#else
+
+ /* an unimplemented architecture */
+ (void) entrypoint;
+ (void) offset;
+
+#endif /* USE_*_ASM */
+}
+
+
+/**
+ * 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;
+}
+
+
+/**
+ * Generate new entrypoint
+ *
+ * Use a temporary dispatch offset of ~0 (i.e. -1). Later, when the driver
+ * calls \c _glapi_add_dispatch 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.
+ *
+ * \param funcName Name of the function to create an entry-point for.
+ *
+ * \sa _glapi_add_entrypoint
+ */
+
+static struct _glapi_function *
+add_function_name( const char * funcName )
+{
+ struct _glapi_function * entry = NULL;
+
+ if (NumExtEntryPoints < MAX_EXTENSION_FUNCS) {
+ _glapi_proc entrypoint = generate_entrypoint(~0);
+ if (entrypoint != NULL) {
+ entry = & ExtEntryTable[NumExtEntryPoints];
+
+ ExtEntryTable[NumExtEntryPoints].name = str_dup(funcName);
+ ExtEntryTable[NumExtEntryPoints].parameter_signature = NULL;
+ ExtEntryTable[NumExtEntryPoints].dispatch_offset = ~0;
+ ExtEntryTable[NumExtEntryPoints].dispatch_stub = entrypoint;
+ NumExtEntryPoints++;
+ }
+ }
+
+ return entry;
+}
+
+
+/**
+ * Fill-in the dispatch stub for the named function.
+ *
+ * This function is intended to be called by a hardware driver. When called,
+ * a dispatch stub may be created created for the function. A pointer to this
+ * dispatch function will be returned by glXGetProcAddress.
+ *
+ * \param function_names Array of pointers to function names that should
+ * share a common dispatch offset.
+ * \param parameter_signature String representing the types of the parameters
+ * passed to the named function. Parameter types
+ * are converted to characters using the following
+ * rules:
+ * - 'i' for \c GLint, \c GLuint, and \c GLenum
+ * - 'p' for any pointer type
+ * - 'f' for \c GLfloat and \c GLclampf
+ * - 'd' for \c GLdouble and \c GLclampd
+ *
+ * \returns
+ * The offset in the dispatch table of the named function. A pointer to the
+ * driver's implementation of the named function should be stored at
+ * \c dispatch_table[\c offset]. Return -1 if error/problem.
+ *
+ * \sa glXGetProcAddress
+ *
+ * \warning
+ * This function can only handle up to 8 names at a time. As far as I know,
+ * the maximum number of names ever associated with an existing GL function is
+ * 4 (\c glPointParameterfSGIS, \c glPointParameterfEXT,
+ * \c glPointParameterfARB, and \c glPointParameterf), so this should not be
+ * too painful of a limitation.
+ *
+ * \todo
+ * Determine whether or not \c parameter_signature should be allowed to be
+ * \c NULL. It doesn't seem like much of a hardship for drivers to have to
+ * pass in an empty string.
+ *
+ * \todo
+ * Determine if code should be added to reject function names that start with
+ * 'glX'.
+ *
+ * \bug
+ * Add code to compare \c parameter_signature with the parameter signature of
+ * a static function. In order to do that, we need to find a way to \b get
+ * the parameter signature of a static function.
+ */
+
+PUBLIC int
+_glapi_add_dispatch( const char * const * function_names,
+ const char * parameter_signature )
+{
+ static int next_dynamic_offset = _gloffset_FIRST_DYNAMIC;
+ const char * const real_sig = (parameter_signature != NULL)
+ ? parameter_signature : "";
+ struct _glapi_function * entry[8];
+ GLboolean is_static[8];
+ unsigned i;
+ unsigned j;
+ int offset = ~0;
+ int new_offset;
+
+
+ (void) memset( is_static, 0, sizeof( is_static ) );
+ (void) memset( entry, 0, sizeof( entry ) );
+
+ for ( i = 0 ; function_names[i] != NULL ; i++ ) {
+ /* Do some trivial validation on the name of the function.
+ */
+
+ if (!function_names[i] || function_names[i][0] != 'g' || function_names[i][1] != 'l')
+ return -1;
+
+ /* Determine if the named function already exists. If the function does
+ * exist, it must have the same parameter signature as the function
+ * being added.
+ */
+
+ new_offset = get_static_proc_offset(function_names[i]);
+ if (new_offset >= 0) {
+ /* FIXME: Make sure the parameter signatures match! How do we get
+ * FIXME: the parameter signature for static functions?
+ */
+
+ if ( (offset != ~0) && (new_offset != offset) ) {
+ return -1;
+ }
+
+ is_static[i] = GL_TRUE;
+ offset = new_offset;
+ }
+
+
+ for ( j = 0 ; j < NumExtEntryPoints ; j++ ) {
+ if (strcmp(ExtEntryTable[j].name, function_names[i]) == 0) {
+ /* The offset may be ~0 if the function name was added by
+ * glXGetProcAddress but never filled in by the driver.
+ */
+
+ if (ExtEntryTable[j].dispatch_offset != ~0) {
+ if (strcmp(real_sig, ExtEntryTable[j].parameter_signature)
+ != 0) {
+ return -1;
+ }
+
+ if ( (offset != ~0) && (ExtEntryTable[j].dispatch_offset != offset) ) {
+ return -1;
+ }
+
+ offset = ExtEntryTable[j].dispatch_offset;
+ }
+
+ entry[i] = & ExtEntryTable[j];
+ break;
+ }
+ }
+ }
+
+ if (offset == ~0) {
+ offset = next_dynamic_offset;
+ next_dynamic_offset++;
+ }
+
+ for ( i = 0 ; function_names[i] != NULL ; i++ ) {
+ if (! is_static[i] ) {
+ if (entry[i] == NULL) {
+ entry[i] = add_function_name( function_names[i] );
+ if (entry[i] == NULL) {
+ /* FIXME: Possible memory leak here.
+ */
+ return -1;
+ }
+ }
+
+ entry[i]->parameter_signature = str_dup(real_sig);
+ fill_in_entrypoint_offset(entry[i]->dispatch_stub, offset);
+ entry[i]->dispatch_offset = offset;
+ }
+ }
+
+ return offset;
+}
+
+
+/**
+ * Return offset of entrypoint for named function within dispatch table.
+ */
+PUBLIC 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].dispatch_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.
+ */
+PUBLIC _glapi_proc
+_glapi_get_proc_address(const char *funcName)
+{
+ struct _glapi_function * entry;
+ 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].dispatch_stub;
+ }
+ }
+
+#if !defined( XFree86Server ) && !defined( XGLServer )
+ /* search static functions */
+ {
+ const _glapi_proc func = get_static_proc_address(funcName);
+ if (func)
+ return func;
+ }
+#endif /* !defined( XFree86Server ) */
+
+ entry = add_function_name(funcName);
+ return (entry == NULL) ? NULL : entry->dispatch_stub;
+}
+
+
+
+/**
+ * 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].dispatch_offset == offset) {
+ return ExtEntryTable[i].name;
+ }
+ }
+ return NULL;
+}
+
+
+
+/**
+ * Do some spot checks to be sure that the dispatch table
+ * slots are assigned correctly. For debugging only.
+ */
+void
+_glapi_check_table(const struct _glapi_table *table)
+{
+#if 0 /* enable this for extra DEBUG */
+ {
+ 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 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);
+ }
+ {
+ 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);
+ }
+ {
+ 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);
+ }
+#else
+ (void) table;
+#endif
+}