diff options
| -rw-r--r-- | src/mesa/glapi/gl_x86_asm.py | 15 | ||||
| -rw-r--r-- | src/mesa/glapi/glapi.c | 20 | ||||
| -rw-r--r-- | src/mesa/x86/glapi_x86.S | 14 |
3 files changed, 34 insertions, 15 deletions
diff --git a/src/mesa/glapi/gl_x86_asm.py b/src/mesa/glapi/gl_x86_asm.py index 650331a0c5a..403e87261b0 100644 --- a/src/mesa/glapi/gl_x86_asm.py +++ b/src/mesa/glapi/gl_x86_asm.py @@ -82,12 +82,18 @@ class PrintGenericStubs(gl_XML.gl_print_base): print '' print '#ifdef GLX_USE_TLS' print '' + print '#ifdef GLX_X86_READONLY_TEXT' + print '# define CTX_INSNS MOV_L(GS:(EAX), EAX)' + print '#else' + print '# define CTX_INSNS NOP /* Pad for init_glapi_relocs() */' + print '#endif' + print '' print '# define GL_STUB(fn,off,fn_alt)\t\t\t\\' print 'ALIGNTEXT16;\t\t\t\t\t\t\\' print 'GLOBL_FN(GL_PREFIX(fn, fn_alt));\t\t\t\\' print 'GL_PREFIX(fn, fn_alt):\t\t\t\t\t\\' print '\tCALL(_x86_get_dispatch) ;\t\t\t\\' - print '\tNOP ;\t\t\t\t\t\t\\' + print '\tCTX_INSNS ; \\' print '\tJMP(GL_OFFSET(off))' print '' print '#elif defined(PTHREADS)' @@ -138,7 +144,10 @@ class PrintGenericStubs(gl_XML.gl_print_base): print '\tHIDDEN(GLNAME(_x86_get_dispatch))' print 'ALIGNTEXT16' print 'GLNAME(_x86_get_dispatch):' - print '\tmovl\t%gs:_glapi_tls_Dispatch@NTPOFF, %eax' + print '\tcall 1f' + print '1:\tpopl %eax' + print '\taddl $_GLOBAL_OFFSET_TABLE_+[.-1b], %eax' + print '\tmovl _glapi_tls_Dispatch@GOTNTPOFF(%eax), %eax' print '\tret' print '' print '#elif defined(PTHREADS)' @@ -158,7 +167,7 @@ class PrintGenericStubs(gl_XML.gl_print_base): print '#endif' print '' - print '#if defined( GLX_USE_TLS )' + print '#if defined( GLX_USE_TLS ) && !defined( GLX_X86_READONLY_TEXT )' print '\t\t.section\twtext, "awx", @progbits' print '#endif /* defined( GLX_USE_TLS ) */' diff --git a/src/mesa/glapi/glapi.c b/src/mesa/glapi/glapi.c index 5815dbff842..47c57822732 100644 --- a/src/mesa/glapi/glapi.c +++ b/src/mesa/glapi/glapi.c @@ -1028,22 +1028,24 @@ _glapi_check_table(const struct _glapi_table *table) #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 ) - extern void * _x86_get_dispatch(void); - const GLubyte * const get_disp = (const GLubyte *) _x86_get_dispatch; +#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, 6 ); + (void) memcpy( curr_func, get_disp, sizeof(run_time_patch)); curr_func += DISPATCH_FUNCTION_SIZE; } -#endif /* defined( USE_X86_ASM ) && defined( GLX_USE_TLS ) */ -} #endif +} +#endif /* defined(PTHREADS) || defined(GLX_USE_TLS) */ diff --git a/src/mesa/x86/glapi_x86.S b/src/mesa/x86/glapi_x86.S index bdf42ac0887..74e93721bc3 100644 --- a/src/mesa/x86/glapi_x86.S +++ b/src/mesa/x86/glapi_x86.S @@ -58,12 +58,17 @@ #ifdef GLX_USE_TLS +#ifdef GLX_X86_READONLY_TEXT +# define CTX_INSNS MOV_L(GS:(EAX), EAX) +#else +# define CTX_INSNS NOP /* Pad for init_glapi_relocs() */ +#endif # define GL_STUB(fn,off,fn_alt) \ ALIGNTEXT16; \ GLOBL_FN(GL_PREFIX(fn, fn_alt)); \ GL_PREFIX(fn, fn_alt): \ CALL(_x86_get_dispatch) ; \ - NOP ; \ + CTX_INSNS ; \ JMP(GL_OFFSET(off)) #elif defined(PTHREADS) @@ -114,7 +119,10 @@ SEG_TEXT HIDDEN(GLNAME(_x86_get_dispatch)) ALIGNTEXT16 GLNAME(_x86_get_dispatch): - movl %gs:_glapi_tls_Dispatch@NTPOFF, %eax + call 1f +1: popl %eax + addl $_GLOBAL_OFFSET_TABLE_+[.-1b], %eax + movl _glapi_tls_Dispatch@GOTNTPOFF(%eax), %eax ret #elif defined(PTHREADS) @@ -133,7 +141,7 @@ GLNAME(_x86_get_dispatch): EXTERN GLNAME(_glapi_get_dispatch) #endif -#if defined( GLX_USE_TLS ) +#if defined( GLX_USE_TLS ) && !defined( GLX_X86_READONLY_TEXT ) .section wtext, "awx", @progbits #endif /* defined( GLX_USE_TLS ) */ |