X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=src%2Fmesa%2Fglapi%2Fglapi_getproc.c;h=1d0389e057469745db937a9ca75a505466758bc3;hb=f9cc6b3ee7c95130992d67c080ff9bc8e8a6d789;hp=6d40b495c7e71424d264bcba09d354c67e556a21;hpb=47ad296a183929c2007c35c60d722b4ac680417d;p=mesa.git

diff --git a/src/mesa/glapi/glapi_getproc.c b/src/mesa/glapi/glapi_getproc.c
index 6d40b495c7e..1d0389e0574 100644
--- a/src/mesa/glapi/glapi_getproc.c
+++ b/src/mesa/glapi/glapi_getproc.c
@@ -23,58 +23,36 @@
  */
 
 /**
- * \file glapi_getproc.
+ * \file glapi_getproc.c
  *
  * Code for implementing glXGetProcAddress(), etc.
  * This was originally in glapi.c but refactored out.
  */
 
 
-#include <stdlib.h>
-#include <string.h>
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#include "glapi/mesa.h"
+#else
 #include "main/glheader.h"
-#include "glapi.h"
-#include "glapioffsets.h"
-#include "glapitable.h"
-
+#include "main/compiler.h"
+#endif
 
-static void
-fill_in_entrypoint_offset(_glapi_proc entrypoint, GLuint offset);
+#include "glapi/glapi.h"
+#include "glapi/glapi_priv.h"
+#include "glapi/glapitable.h"
+#include "glapi/glapioffsets.h"
 
 
-/**
- * strdup() is actually not a standard ANSI C or POSIX routine.
- * Irix will not define it if ANSI mode is in effect.
+/**********************************************************************
+ * Static function management.
  */
-static char *
-str_dup(const char *str)
-{
-   char *copy;
-   copy = (char*) malloc(strlen(str) + 1);
-   if (!copy)
-      return NULL;
-   strcpy(copy, str);
-   return copy;
-}
 
 
-
-#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)
+#if !defined(DISPATCH_FUNCTION_SIZE) && !defined(XFree86Server)
 # define NEED_FUNCTION_POINTER
 #endif
-
-/* The code in this file is auto-generated with Python */
-#include "glprocs.h"
+#include "glapi/glprocs.h"
 
 
 /**
@@ -82,12 +60,18 @@ str_dup(const char *str)
  * and return the corresponding glprocs_table_t entry.
  */
 static const glprocs_table_t *
-find_entry( const char * n )
+get_static_proc( 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;
-      if (strcmp(testName, n) == 0) {
+#ifdef MANGLE
+      /* skip the prefix on the name */
+      if (strcmp(testName, n + 1) == 0)
+#else
+      if (strcmp(testName, n) == 0)
+#endif
+      {
 	 return &static_functions[i];
       }
    }
@@ -102,26 +86,16 @@ find_entry( const char * n )
 static GLint
 get_static_proc_offset(const char *funcName)
 {
-   const glprocs_table_t * const f = find_entry( funcName );
-   if (f) {
-      return f->Offset;
+   const glprocs_table_t * const f = get_static_proc( funcName );
+   if (f == NULL) {
+      return -1;
    }
-   return -1;
-}
 
+   return f->Offset;
+}
 
-#if !defined(XFree86Server) && !defined(XGLServer)
-#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)
 
 /**
  * Return dispatch function address for the named static (built-in) function.
@@ -130,27 +104,32 @@ extern const GLubyte gl_dispatch_functions_start[];
 static _glapi_proc
 get_static_proc_address(const char *funcName)
 {
-   const glprocs_table_t * const f = find_entry( funcName );
-   if (f) {
+   const glprocs_table_t * const f = get_static_proc( funcName );
+   if (f == NULL) {
+      return NULL;
+   }
+
 #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;
+   return (f->Address == NULL)
+      ? get_entrypoint_address(f->Offset)
+      : f->Address;
 #elif defined(DISPATCH_FUNCTION_SIZE)
-      return (_glapi_proc) (gl_dispatch_functions_start 
-                            + (DISPATCH_FUNCTION_SIZE * f->Offset));
+   return get_entrypoint_address(f->Offset);
 #else
-      return f->Address;
+   return f->Address;
 #endif
-   }
-   else {
-      return NULL;
-   }
 }
 
-#endif /* !defined(XFree86Server) && !defined(XGLServer) */
+#else
+
+static _glapi_proc
+get_static_proc_address(const char *funcName)
+{
+   (void) funcName;
+   return NULL;
+}
 
+#endif /* !defined(XFree86Server) */
 
 
 /**
@@ -221,137 +200,79 @@ struct _glapi_function {
 };
 
 
+/*
+ * Number of extension functions which we can dynamically add at runtime.
+ */
+#define MAX_EXTENSION_FUNCS 300
+
+
 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
 
-/**
- * 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)
+static struct _glapi_function *
+get_extension_proc(const char *funcName)
 {
-#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);
+   GLuint i;
+   for (i = 0; i < NumExtEntryPoints; i++) {
+      if (strcmp(ExtEntryTable[i].name, funcName) == 0) {
+         return & ExtEntryTable[i];
+      }
+   }
+   return NULL;
+}
 
 
-   if ( code != NULL ) {
-      (void) memcpy(code, template_func, DISPATCH_FUNCTION_SIZE);
-      fill_in_entrypoint_offset( (_glapi_proc) code, functionOffset );
+static GLint
+get_extension_proc_offset(const char *funcName)
+{
+   const struct _glapi_function * const f = get_extension_proc( funcName );
+   if (f == NULL) {
+      return -1;
    }
 
-   return (_glapi_proc) code;
-#elif defined(USE_SPARC_ASM)
-
-#ifdef __arch64__
-   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 /* __arch64__ */
-   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));
-
-#ifdef __arch64__
-      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 /* __arch64__ */
-   }
-   return (_glapi_proc) code;
-#else
-   (void) functionOffset;
-   return NULL;
-#endif /* USE_*_ASM */
+   return f->dispatch_offset;
 }
 
 
-/**
- * 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)
+static _glapi_proc
+get_extension_proc_address(const char *funcName)
 {
-#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
+   const struct _glapi_function * const f = get_extension_proc( funcName );
+   if (f == NULL) {
+      return NULL;
+   }
 
-#elif defined(USE_SPARC_ASM)
-
-   /* XXX this hasn't been tested! */
-   unsigned int *code = (unsigned int *) entrypoint;
-#ifdef __arch64__
-   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 /* __arch64__ */
-   code[2] = 0xc6006000;  /* ld		[%g1 + %lo(4*glapioffset)], %g3	  */
-   code[2] |= (offset * 4);
-   __glapi_sparc_icache_flush(&code[2]);
-#endif /* __arch64__ */
+   return f->dispatch_stub;
+}
 
-#else
 
-   /* an unimplemented architecture */
-   (void) entrypoint;
-   (void) offset;
+static const char *
+get_extension_proc_name(GLuint offset)
+{
+   GLuint i;
+   for (i = 0; i < NumExtEntryPoints; i++) {
+      if (ExtEntryTable[i].dispatch_offset == offset) {
+         return ExtEntryTable[i].name;
+      }
+   }
+   return NULL;
+}
 
-#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;
 }
 
 
@@ -447,7 +368,6 @@ _glapi_add_dispatch( const char * const * function_names,
    struct _glapi_function * entry[8];
    GLboolean is_static[8];
    unsigned i;
-   unsigned j;
    int offset = ~0;
    int new_offset;
 
@@ -482,28 +402,25 @@ _glapi_add_dispatch( const char * const * function_names,
       }
    
    
-      for ( j = 0 ; j < NumExtEntryPoints ; j++ ) {
-	 if (strcmp(ExtEntryTable[j].name, function_names[i]) == 0) {
+      entry[i] = get_extension_proc(function_names[i]);
+
+      if (entry[i] != NULL) {
+
 	    /* 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) {
+	    if (entry[i]->dispatch_offset != ~0) {
+	       if (strcmp(real_sig, entry[i]->parameter_signature) != 0) {
 		  return -1;
 	       }
 
-	       if ( (offset != ~0) && (ExtEntryTable[j].dispatch_offset != offset) ) {
+	       if ( (offset != ~0) && (entry[i]->dispatch_offset != offset) ) {
 		  return -1;
 	       }
 
-	       offset = ExtEntryTable[j].dispatch_offset;
+	       offset = entry[i]->dispatch_offset;
 	    }
-	    
-	    entry[i] = & ExtEntryTable[j];
-	    break;
-	 }
       }
    }
 
@@ -539,13 +456,13 @@ _glapi_add_dispatch( const char * const * function_names,
 PUBLIC GLint
 _glapi_get_proc_offset(const char *funcName)
 {
+   GLint offset;
+
    /* search extension functions first */
-   GLuint i;
-   for (i = 0; i < NumExtEntryPoints; i++) {
-      if (strcmp(ExtEntryTable[i].name, funcName) == 0) {
-         return ExtEntryTable[i].dispatch_offset;
-      }
-   }
+   offset = get_extension_proc_offset(funcName);
+   if (offset >= 0)
+      return offset;
+
    /* search static functions */
    return get_static_proc_offset(funcName);
 }
@@ -557,14 +474,15 @@ _glapi_get_proc_offset(const char *funcName)
  * in the name of static functions, try generating a new API entrypoint on
  * the fly with assembly language.
  */
-_glapi_proc
+PUBLIC _glapi_proc
 _glapi_get_proc_address(const char *funcName)
 {
+   _glapi_proc func;
    struct _glapi_function * entry;
-   GLuint i;
 
 #ifdef MANGLE
-   if (funcName[0] != 'm' || funcName[1] != 'g' || funcName[2] != 'l')
+   /* skip the prefix on the name */
+   if (funcName[1] != 'g' || funcName[2] != 'l')
       return NULL;
 #else
    if (funcName[0] != 'g' || funcName[1] != 'l')
@@ -572,20 +490,14 @@ _glapi_get_proc_address(const char *funcName)
 #endif
 
    /* search extension functions first */
-   for (i = 0; i < NumExtEntryPoints; i++) {
-      if (strcmp(ExtEntryTable[i].name, funcName) == 0) {
-         return ExtEntryTable[i].dispatch_stub;
-      }
-   }
+   func = get_extension_proc_address(funcName);
+   if (func)
+      return func;
 
-#if !defined( XFree86Server ) && !defined( XGLServer )
    /* search static functions */
-   {
-      const _glapi_proc func = get_static_proc_address(funcName);
-      if (func)
-         return func;
-   }
-#endif /* !defined( XFree86Server ) */
+   func = get_static_proc_address(funcName);
+   if (func)
+      return func;
 
    entry = add_function_name(funcName);
    return (entry == NULL) ? NULL : entry->dispatch_stub;
@@ -600,7 +512,6 @@ _glapi_get_proc_address(const char *funcName)
 const char *
 _glapi_get_proc_name(GLuint offset)
 {
-   GLuint i;
    const char * n;
 
    /* search built-in functions */
@@ -610,10 +521,121 @@ _glapi_get_proc_name(GLuint offset)
    }
 
    /* search added extension functions */
-   for (i = 0; i < NumExtEntryPoints; i++) {
-      if (ExtEntryTable[i].dispatch_offset == offset) {
-         return ExtEntryTable[i].name;
-      }
+   return get_extension_proc_name(offset);
+}
+
+
+
+/**********************************************************************
+ * GL API table functions.
+ */
+
+
+/*
+ * 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)
+
+
+/**
+ * Return size of dispatch table struct as number of functions (or
+ * slots).
+ */
+PUBLIC GLuint
+_glapi_get_dispatch_table_size(void)
+{
+   return DISPATCH_TABLE_SIZE;
+}
+
+
+/**
+ * Make sure there are no NULL pointers in the given dispatch table.
+ * Intended for debugging purposes.
+ */
+void
+_glapi_check_table_not_null(const struct _glapi_table *table)
+{
+#ifdef EXTRA_DEBUG /* set to DEBUG for extra 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]);
    }
-   return NULL;
+#else
+   (void) table;
+#endif
+}
+
+
+/**
+ * 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)
+{
+#ifdef EXTRA_DEBUG /* set to DEBUG 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
 }