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-rw-r--r--xorg-server/glx/glapi.c736
1 files changed, 541 insertions, 195 deletions
diff --git a/xorg-server/glx/glapi.c b/xorg-server/glx/glapi.c
index 94ec718da..1fa70929f 100644
--- a/xorg-server/glx/glapi.c
+++ b/xorg-server/glx/glapi.c
@@ -72,7 +72,6 @@
#include <assert.h>
#endif
#include <unistd.h>
-#define str_dup strdup
#include "glapi.h"
#include "GL/gl.h"
@@ -92,6 +91,7 @@ static void init_glapi_relocs(void);
static _glapi_proc generate_entrypoint(GLuint functionOffset);
static void fill_in_entrypoint_offset(_glapi_proc entrypoint, GLuint offset);
+static void init_glapi_relocs_once( void );
/*
* Enable/disable printing of warning messages.
@@ -340,10 +340,7 @@ _glapi_get_context(void)
void
_glapi_set_dispatch(struct _glapi_table *dispatch)
{
-#if defined(PTHREADS) || defined(GLX_USE_TLS)
- static pthread_once_t once_control = PTHREAD_ONCE_INIT;
- pthread_once( & once_control, init_glapi_relocs );
-#endif
+ init_glapi_relocs_once();
if (dispatch == NULL) {
/* use the no-op functions */
@@ -392,16 +389,22 @@ _glapi_get_dispatch(void)
*** functionality.
***/
-#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)
+#if defined(USE_X86_ASM)
+# if defined(GLX_USE_TLS)
+# define DISPATCH_FUNCTION_SIZE 16
+# elif defined(THREADS)
# define DISPATCH_FUNCTION_SIZE 32
# else
# define DISPATCH_FUNCTION_SIZE 16
# endif
#endif
+#if defined(USE_X64_64_ASM)
+# if defined(GLX_USE_TLS)
+# define DISPATCH_FUNCTION_SIZE 16
+# endif
+#endif
+
#if !defined(DISPATCH_FUNCTION_SIZE) && !defined(XFree86Server) && !defined(XGLServer)
# define NEED_FUNCTION_POINTER
#endif
@@ -415,12 +418,18 @@ _glapi_get_dispatch(void)
* 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];
}
}
@@ -435,11 +444,12 @@ 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;
}
@@ -447,19 +457,15 @@ get_static_proc_offset(const char *funcName)
* Extension function management.
*/
-/*
+/**
* Number of extension functions which we can dynamically add at runtime.
+ *
+ * Number of extension functions is also subject to the size of backing exec
+ * mem we allocate. For the common case of dispatch stubs with size 16 bytes,
+ * the two limits will be hit simultaneously. For larger dispatch function
+ * sizes, MAX_EXTENSION_FUNCS is effectively reduced.
*/
-#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)
+#define MAX_EXTENSION_FUNCS 256
/**
@@ -510,26 +516,183 @@ struct _glapi_function {
static struct _glapi_function ExtEntryTable[MAX_EXTENSION_FUNCS];
static GLuint NumExtEntryPoints = 0;
-#ifdef USE_SPARC_ASM
-extern void __glapi_sparc_icache_flush(unsigned int *);
+
+static struct _glapi_function *
+get_extension_proc(const char *funcName)
+{
+ GLuint i;
+ for (i = 0; i < NumExtEntryPoints; i++) {
+ if (strcmp(ExtEntryTable[i].name, funcName) == 0) {
+ return & ExtEntryTable[i];
+ }
+ }
+ return NULL;
+}
+
+
+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 f->dispatch_offset;
+}
+
+
+static _glapi_proc
+get_extension_proc_address(const char *funcName)
+{
+ const struct _glapi_function * const f = get_extension_proc( funcName );
+ if (f == NULL) {
+ return NULL;
+ }
+
+ return f->dispatch_stub;
+}
+
+
+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;
+}
+
+
+/**
+ * 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;
+ _glapi_proc entrypoint = NULL;
+ char * name_dup = NULL;
+
+ if (NumExtEntryPoints >= MAX_EXTENSION_FUNCS)
+ return NULL;
+
+ if (funcName == NULL)
+ return NULL;
+
+ name_dup = str_dup(funcName);
+ if (name_dup == NULL)
+ return NULL;
+
+ entrypoint = generate_entrypoint(~0);
+
+ if (entrypoint == NULL) {
+ free(name_dup);
+ return NULL;
+ }
+
+ entry = & ExtEntryTable[NumExtEntryPoints];
+ NumExtEntryPoints++;
+
+ entry->name = name_dup;
+ entry->parameter_signature = NULL;
+ entry->dispatch_offset = ~0;
+ entry->dispatch_stub = entrypoint;
+
+ return entry;
+}
+
+
+static struct _glapi_function *
+set_entry_info( struct _glapi_function * entry, const char * signature, unsigned offset )
+{
+ char * sig_dup = NULL;
+
+ if (signature == NULL)
+ return NULL;
+
+ sig_dup = str_dup(signature);
+ if (sig_dup == NULL)
+ return NULL;
+
+ fill_in_entrypoint_offset(entry->dispatch_stub, offset);
+
+ entry->parameter_signature = sig_dup;
+ entry->dispatch_offset = offset;
+
+ return entry;
+}
+
+#if defined(USE_X86_ASM)
+
+/**
+ * Perform platform-specific GL API entry-point fixups.
+ */
+static void
+init_glapi_relocs( void )
+{
+#if 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
+}
+
/**
* 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)
+_glapi_proc
+generate_entrypoint(unsigned int 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);
+ GLubyte * const code = (GLubyte *) u_execmem_alloc(DISPATCH_FUNCTION_SIZE);
if ( code != NULL ) {
@@ -538,59 +701,6 @@ generate_entrypoint(GLuint functionOffset)
}
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 */
}
@@ -598,83 +708,235 @@ generate_entrypoint(GLuint functionOffset)
* 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)
+void
+fill_in_entrypoint_offset(_glapi_proc entrypoint, unsigned int offset)
{
-#if defined(USE_X86_ASM)
GLubyte * const code = (GLubyte *) entrypoint;
-#if DISPATCH_FUNCTION_SIZE == 32
+#if defined(GLX_USE_TLS)
+ *((unsigned int *)(code + 8)) = 4 * offset;
+#elif defined(THREADS)
*((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!
+ *((unsigned int *)(code + 7)) = 4 * offset;
#endif
+}
+
#elif defined(USE_SPARC_ASM)
- /* XXX this hasn't been tested! */
- unsigned int *code = (unsigned int *) entrypoint;
+extern void __glapi_sparc_icache_flush(unsigned int *);
+
+static void
+init_glapi_relocs( void )
+{
+#if defined(PTHREADS) || defined(GLX_USE_TLS)
+ 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__
- 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__ */
+ 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
+#ifdef 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
+}
- /* an unimplemented architecture */
- (void) entrypoint;
- (void) offset;
-#endif /* USE_*_ASM */
+_glapi_proc
+generate_entrypoint(GLuint functionOffset)
+{
+#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 *) u_execmem_alloc(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
}
-/**
- * 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
- */
+void
+fill_in_entrypoint_offset(_glapi_proc entrypoint, GLuint offset)
+{
+ unsigned int *code = (unsigned int *) entrypoint;
-static struct _glapi_function *
-add_function_name( const char * funcName )
+ code[0] &= ~0x3fffff;
+ code[0] |= (offset * sizeof(void *)) & 0x3fffff;
+ __glapi_sparc_icache_flush(&code[0]);
+}
+
+
+#else /* USE_*_ASM */
+
+static void
+init_glapi_relocs( void )
{
- 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;
+
+_glapi_proc
+generate_entrypoint(GLuint functionOffset)
+{
+ (void) functionOffset;
+ return NULL;
+}
+
+
+void
+fill_in_entrypoint_offset(_glapi_proc entrypoint, GLuint offset)
+{
+ /* an unimplemented architecture */
+ (void) entrypoint;
+ (void) offset;
}
+#endif /* USE_*_ASM */
+
+
+void
+init_glapi_relocs_once( void )
+{
+#if defined(PTHREADS) || defined(GLX_USE_TLS)
+ static pthread_once_t once_control = PTHREAD_ONCE_INIT;
+ pthread_once( & once_control, init_glapi_relocs );
+#endif
+}
/**
* Fill-in the dispatch stub for the named function.
@@ -697,7 +959,7 @@ add_function_name( const char * funcName )
* \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].
+ * \c dispatch_table[\c offset]. Return -1 if error/problem.
*
* \sa glXGetProcAddress
*
@@ -723,7 +985,8 @@ add_function_name( const char * funcName )
* the parameter signature of a static function.
*/
-PUBLIC int
+PUBLIC
+int
_glapi_add_dispatch( const char * const * function_names,
const char * parameter_signature )
{
@@ -733,88 +996,103 @@ _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;
+ init_glapi_relocs_once();
(void) memset( is_static, 0, sizeof( is_static ) );
(void) memset( entry, 0, sizeof( entry ) );
+ /* Find the _single_ dispatch offset for all function names that already
+ * exist (and have a dispatch offset).
+ */
+
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 GL_FALSE;
-
- /* 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) {
+ const char * funcName = function_names[i];
+ int static_offset;
+ int extension_offset;
+
+ if (funcName[0] != 'g' || funcName[1] != 'l')
+ return -1;
+
+ /* search built-in functions */
+ static_offset = get_static_proc_offset(funcName);
+
+ if (static_offset >= 0) {
+
+ is_static[i] = GL_TRUE;
+
/* FIXME: Make sure the parameter signatures match! How do we get
* FIXME: the parameter signature for static functions?
*/
- if ( (offset != ~0) && (new_offset != offset) ) {
+ if ( (offset != ~0) && (static_offset != offset) ) {
return -1;
}
- is_static[i] = GL_TRUE;
- offset = new_offset;
+ offset = static_offset;
+
+ continue;
}
-
-
- 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;
+
+ /* search added extension functions */
+ entry[i] = get_extension_proc(funcName);
+
+ if (entry[i] != NULL) {
+ extension_offset = entry[i]->dispatch_offset;
+
+ /* The offset may be ~0 if the function name was added by
+ * glXGetProcAddress but never filled in by the driver.
+ */
+
+ if (extension_offset == ~0) {
+ continue;
}
+
+ if (strcmp(real_sig, entry[i]->parameter_signature) != 0) {
+ return -1;
+ }
+
+ if ( (offset != ~0) && (extension_offset != offset) ) {
+ return -1;
+ }
+
+ offset = extension_offset;
}
}
+ /* If all function names are either new (or with no dispatch offset),
+ * allocate a new dispatch offset.
+ */
+
if (offset == ~0) {
offset = next_dynamic_offset;
next_dynamic_offset++;
}
+ /* Fill in the dispatch offset for the new function names (and those with
+ * no dispatch offset).
+ */
+
for ( i = 0 ; function_names[i] != NULL ; i++ ) {
- if (! is_static[i] ) {
+ if (is_static[i]) {
+ continue;
+ }
+
+ /* generate entrypoints for new function names */
+ if (entry[i] == NULL) {
+ entry[i] = add_function_name( function_names[i] );
if (entry[i] == NULL) {
- entry[i] = add_function_name( function_names[i] );
- if (entry[i] == NULL) {
- /* FIXME: Possible memory leak here.
- */
- return -1;
- }
+ /* 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;
+ if (entry[i]->dispatch_offset == ~0) {
+ set_entry_info( entry[i], real_sig, offset );
}
}
-
+
return offset;
}
@@ -825,7 +1103,13 @@ _glapi_add_dispatch( const char * const * function_names,
GLuint
_glapi_get_dispatch_table_size(void)
{
- return DISPATCH_TABLE_SIZE;
+ /*
+ * 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.
+ */
+ return FIRST_DYNAMIC_OFFSET + MAX_EXTENSION_FUNCS;
}
@@ -836,7 +1120,7 @@ _glapi_get_dispatch_table_size(void)
void
_glapi_check_table_not_null(const struct _glapi_table *table)
{
-#if 0 /* enable this for extra DEBUG */
+#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;
@@ -847,3 +1131,65 @@ _glapi_check_table_not_null(const struct _glapi_table *table)
(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 == offset);
+ }
+ {
+ GLuint viewportOffset = _glapi_get_proc_offset("glViewport");
+ char *viewportFunc = (char*) &table->Viewport;
+ GLuint offset = (viewportFunc - (char *) table) / sizeof(void *);
+ assert(viewportOffset == offset);
+ }
+ {
+ GLuint VertexPointerOffset = _glapi_get_proc_offset("glVertexPointer");
+ char *VertexPointerFunc = (char*) &table->VertexPointer;
+ GLuint offset = (VertexPointerFunc - (char *) table) / sizeof(void *);
+ assert(VertexPointerOffset == offset);
+ }
+ {
+ GLuint ResetMinMaxOffset = _glapi_get_proc_offset("glResetMinmax");
+ char *ResetMinMaxFunc = (char*) &table->ResetMinmax;
+ GLuint offset = (ResetMinMaxFunc - (char *) table) / sizeof(void *);
+ assert(ResetMinMaxOffset == offset);
+ }
+ {
+ GLuint blendColorOffset = _glapi_get_proc_offset("glBlendColor");
+ char *blendColorFunc = (char*) &table->BlendColor;
+ GLuint offset = (blendColorFunc - (char *) table) / sizeof(void *);
+ assert(blendColorOffset == offset);
+ }
+ {
+ GLuint secondaryColor3fOffset = _glapi_get_proc_offset("glSecondaryColor3fEXT");
+ char *secondaryColor3fFunc = (char*) &table->SecondaryColor3fEXT;
+ GLuint offset = (secondaryColor3fFunc - (char *) table) / sizeof(void *);
+ assert(secondaryColor3fOffset == offset);
+ }
+ {
+ GLuint pointParameterivOffset = _glapi_get_proc_offset("glPointParameterivNV");
+ char *pointParameterivFunc = (char*) &table->PointParameterivNV;
+ GLuint offset = (pointParameterivFunc - (char *) table) / sizeof(void *);
+ assert(pointParameterivOffset == offset);
+ }
+ {
+ GLuint setFenceOffset = _glapi_get_proc_offset("glSetFenceNV");
+ char *setFenceFunc = (char*) &table->SetFenceNV;
+ GLuint offset = (setFenceFunc - (char *) table) / sizeof(void *);
+ assert(setFenceOffset == offset);
+ }
+#else
+ (void) table;
+#endif
+}
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