diff options
Diffstat (limited to 'mesalib/src/mapi/glapi/glapi_entrypoint.c')
| -rw-r--r-- | mesalib/src/mapi/glapi/glapi_entrypoint.c | 344 |
1 files changed, 344 insertions, 0 deletions
diff --git a/mesalib/src/mapi/glapi/glapi_entrypoint.c b/mesalib/src/mapi/glapi/glapi_entrypoint.c new file mode 100644 index 000000000..993ccb94c --- /dev/null +++ b/mesalib/src/mapi/glapi/glapi_entrypoint.c @@ -0,0 +1,344 @@ +/* + * 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_entrypoint.c + * + * Arch-specific code for manipulating GL API entrypoints (dispatch stubs). + */ + + +#include "glapi/glapi_priv.h" +#include "mapi/u_execmem.h" + + +#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(DISPATCH_FUNCTION_SIZE) + +_glapi_proc +get_entrypoint_address(unsigned int functionOffset) +{ + return (_glapi_proc) (gl_dispatch_functions_start + + (DISPATCH_FUNCTION_SIZE * functionOffset)); +} + +#endif + + +#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. + */ +_glapi_proc +generate_entrypoint(unsigned int functionOffset) +{ + /* 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 *) u_execmem_alloc(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; +} + + +/** + * This function inserts a new dispatch offset into the assembly language + * stub that was generated with the preceeding function. + */ +void +fill_in_entrypoint_offset(_glapi_proc entrypoint, unsigned int offset) +{ + GLubyte * const code = (GLubyte *) entrypoint; + +#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; +#else + *((unsigned int *)(code + 7)) = 4 * offset; +#endif +} + + +#elif defined(USE_SPARC_ASM) + +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__ + 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 +} + + +_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 +} + + +void +fill_in_entrypoint_offset(_glapi_proc entrypoint, GLuint offset) +{ + unsigned int *code = (unsigned int *) entrypoint; + + code[0] &= ~0x3fffff; + code[0] |= (offset * sizeof(void *)) & 0x3fffff; + __glapi_sparc_icache_flush(&code[0]); +} + + +#else /* USE_*_ASM */ + +static void +init_glapi_relocs( void ) +{ +} + + +_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 +} |