1 2# (C) Copyright IBM Corporation 2004, 2005 3# All Rights Reserved. 4# 5# Permission is hereby granted, free of charge, to any person obtaining a 6# copy of this software and associated documentation files (the "Software"), 7# to deal in the Software without restriction, including without limitation 8# on the rights to use, copy, modify, merge, publish, distribute, sub 9# license, and/or sell copies of the Software, and to permit persons to whom 10# the Software is furnished to do so, subject to the following conditions: 11# 12# The above copyright notice and this permission notice (including the next 13# paragraph) shall be included in all copies or substantial portions of the 14# Software. 15# 16# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18# FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 19# IBM AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 21# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 22# IN THE SOFTWARE. 23# 24# Authors: 25# Ian Romanick <idr@us.ibm.com> 26 27from __future__ import print_function 28 29import argparse 30 31import license 32import gl_XML, glX_XML 33 34class PrintGenericStubs(gl_XML.gl_print_base): 35 36 def __init__(self): 37 gl_XML.gl_print_base.__init__(self) 38 39 self.name = "gl_x86_asm.py (from Mesa)" 40 self.license = license.bsd_license_template % ( \ 41"""Copyright (C) 1999-2001 Brian Paul All Rights Reserved. 42(C) Copyright IBM Corporation 2004, 2005""", "BRIAN PAUL, IBM") 43 return 44 45 46 def get_stack_size(self, f): 47 size = 0 48 for p in f.parameterIterator(): 49 if p.is_padding: 50 continue 51 52 size += p.get_stack_size() 53 54 return size 55 56 57 def printRealHeader(self): 58 print('#include "x86/assyntax.h"') 59 print('') 60 print('#if defined(STDCALL_API)') 61 print('# define GL_PREFIX(n,n2) GLNAME(CONCAT(gl,n2))') 62 print('#else') 63 print('# define GL_PREFIX(n,n2) GLNAME(CONCAT(gl,n))') 64 print('#endif') 65 print('') 66 print('#define GL_OFFSET(x) CODEPTR(REGOFF(4 * x, EAX))') 67 print('') 68 print('#if defined(GNU_ASSEMBLER) && !defined(__MINGW32__) && !defined(__APPLE__)') 69 print('#define GLOBL_FN(x) GLOBL x ; .type x, @function') 70 print('#else') 71 print('#define GLOBL_FN(x) GLOBL x') 72 print('#endif') 73 print('') 74 print('') 75 print('#ifdef USE_ELF_TLS') 76 print('') 77 print('#ifdef GLX_X86_READONLY_TEXT') 78 print('# define CTX_INSNS MOV_L(GS:(EAX), EAX)') 79 print('#else') 80 print('# define CTX_INSNS NOP /* Pad for init_glapi_relocs() */') 81 print('#endif') 82 print('') 83 print('# define GL_STUB(fn,off,fn_alt)\t\t\t\\') 84 print('ALIGNTEXT16;\t\t\t\t\t\t\\') 85 print('GLOBL_FN(GL_PREFIX(fn, fn_alt));\t\t\t\\') 86 print('GL_PREFIX(fn, fn_alt):\t\t\t\t\t\\') 87 print('\tCALL(_x86_get_dispatch) ;\t\t\t\\') 88 print('\tCTX_INSNS ; \\') 89 print('\tJMP(GL_OFFSET(off))') 90 print('') 91 print('#elif defined(HAVE_PTHREAD)') 92 print('# define GL_STUB(fn,off,fn_alt)\t\t\t\\') 93 print('ALIGNTEXT16;\t\t\t\t\t\t\\') 94 print('GLOBL_FN(GL_PREFIX(fn, fn_alt));\t\t\t\\') 95 print('GL_PREFIX(fn, fn_alt):\t\t\t\t\t\\') 96 print('\tMOV_L(CONTENT(GLNAME(_glapi_Dispatch)), EAX) ;\t\\') 97 print('\tTEST_L(EAX, EAX) ;\t\t\t\t\\') 98 print('\tJE(1f) ;\t\t\t\t\t\\') 99 print('\tJMP(GL_OFFSET(off)) ;\t\t\t\t\\') 100 print('1:\tCALL(_x86_get_dispatch) ;\t\t\t\\') 101 print('\tJMP(GL_OFFSET(off))') 102 print('#else') 103 print('# define GL_STUB(fn,off,fn_alt)\t\t\t\\') 104 print('ALIGNTEXT16;\t\t\t\t\t\t\\') 105 print('GLOBL_FN(GL_PREFIX(fn, fn_alt));\t\t\t\\') 106 print('GL_PREFIX(fn, fn_alt):\t\t\t\t\t\\') 107 print('\tMOV_L(CONTENT(GLNAME(_glapi_Dispatch)), EAX) ;\t\\') 108 print('\tTEST_L(EAX, EAX) ;\t\t\t\t\\') 109 print('\tJE(1f) ;\t\t\t\t\t\\') 110 print('\tJMP(GL_OFFSET(off)) ;\t\t\t\t\\') 111 print('1:\tCALL(_glapi_get_dispatch) ;\t\t\t\\') 112 print('\tJMP(GL_OFFSET(off))') 113 print('#endif') 114 print('') 115 print('#ifdef HAVE_FUNC_ATTRIBUTE_ALIAS') 116 print('# define GL_STUB_ALIAS(fn,off,fn_alt,alias,alias_alt)\t\\') 117 print('\t.globl\tGL_PREFIX(fn, fn_alt) ;\t\t\t\\') 118 print('\t.set\tGL_PREFIX(fn, fn_alt), GL_PREFIX(alias, alias_alt)') 119 print('#else') 120 print('# define GL_STUB_ALIAS(fn,off,fn_alt,alias,alias_alt)\t\\') 121 print(' GL_STUB(fn, off, fn_alt)') 122 print('#endif') 123 print('') 124 print('SEG_TEXT') 125 print('') 126 print('#ifdef USE_ELF_TLS') 127 print('') 128 print('\tGLOBL\tGLNAME(_x86_get_dispatch)') 129 print('\tHIDDEN(GLNAME(_x86_get_dispatch))') 130 print('ALIGNTEXT16') 131 print('GLNAME(_x86_get_dispatch):') 132 print('\tcall 1f') 133 print('1:\tpopl %eax') 134 print('\taddl $_GLOBAL_OFFSET_TABLE_+[.-1b], %eax') 135 print('\tmovl _glapi_tls_Dispatch@GOTNTPOFF(%eax), %eax') 136 print('\tret') 137 print('') 138 print('#elif defined(HAVE_PTHREAD)') 139 print('EXTERN GLNAME(_glapi_Dispatch)') 140 print('EXTERN GLNAME(_gl_DispatchTSD)') 141 print('EXTERN GLNAME(pthread_getspecific)') 142 print('') 143 print('ALIGNTEXT16') 144 print('GLNAME(_x86_get_dispatch):') 145 print('\tSUB_L(CONST(24), ESP)') 146 print('\tPUSH_L(GLNAME(_gl_DispatchTSD))') 147 print('\tCALL(GLNAME(pthread_getspecific))') 148 print('\tADD_L(CONST(28), ESP)') 149 print('\tRET') 150 print('#else') 151 print('EXTERN GLNAME(_glapi_get_dispatch)') 152 print('#endif') 153 print('') 154 155 print('#if defined( USE_ELF_TLS ) && !defined( GLX_X86_READONLY_TEXT )') 156 print('\t\t.section\twtext, "awx", @progbits') 157 print('#endif /* defined( USE_ELF_TLS ) */') 158 159 print('') 160 print('\t\tALIGNTEXT16') 161 print('\t\tGLOBL GLNAME(gl_dispatch_functions_start)') 162 print('\t\tHIDDEN(GLNAME(gl_dispatch_functions_start))') 163 print('GLNAME(gl_dispatch_functions_start):') 164 print('') 165 return 166 167 168 def printRealFooter(self): 169 print('') 170 print('\t\tGLOBL\tGLNAME(gl_dispatch_functions_end)') 171 print('\t\tHIDDEN(GLNAME(gl_dispatch_functions_end))') 172 print('\t\tALIGNTEXT16') 173 print('GLNAME(gl_dispatch_functions_end):') 174 print('') 175 print('#if defined (__ELF__) && defined (__linux__)') 176 print(' .section .note.GNU-stack,"",%progbits') 177 print('#endif') 178 return 179 180 181 def printBody(self, api): 182 for f in api.functionIterateByOffset(): 183 name = f.dispatch_name() 184 stack = self.get_stack_size(f) 185 alt = "%s@%u" % (name, stack) 186 187 print('\tGL_STUB(%s, %d, %s)' % (name, f.offset, alt)) 188 189 if not f.is_static_entry_point(f.name): 190 print('\tHIDDEN(GL_PREFIX(%s, %s))' % (name, alt)) 191 192 193 for f in api.functionIterateByOffset(): 194 name = f.dispatch_name() 195 stack = self.get_stack_size(f) 196 alt = "%s@%u" % (name, stack) 197 198 for n in f.entry_points: 199 if f.is_static_entry_point(n): 200 if n != f.name: 201 alt2 = "%s@%u" % (n, stack) 202 text = '\tGL_STUB_ALIAS(%s, %d, %s, %s, %s)' % (n, f.offset, alt2, name, alt) 203 204 if f.has_different_protocol(n): 205 print('#ifndef GLX_INDIRECT_RENDERING') 206 print(text) 207 print('#endif') 208 else: 209 print(text) 210 211 return 212 213def _parser(): 214 parser = argparse.ArgumentParser() 215 parser.add_argument('-f', 216 dest='filename', 217 default='gl_API.xml', 218 help='An XML file describing an API.') 219 return parser.parse_args() 220 221 222def main(): 223 args = _parser() 224 printer = PrintGenericStubs() 225 226 api = gl_XML.parse_GL_API(args.filename, glX_XML.glx_item_factory()) 227 printer.Print(api) 228 229 230if __name__ == '__main__': 231 main() 232