diff options
Diffstat (limited to 'xorg-server')
| -rw-r--r-- | xorg-server/glx/glapi.c | 736 |
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 +} |