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 27import argparse 28 29import license 30import gl_XML, glX_XML 31 32class PrintGenericStubs(gl_XML.gl_print_base): 33 34 def __init__(self): 35 gl_XML.gl_print_base.__init__(self) 36 37 self.name = "gl_x86_asm.py (from Mesa)" 38 self.license = license.bsd_license_template % ( \ 39"""Copyright (C) 1999-2001 Brian Paul All Rights Reserved. 40(C) Copyright IBM Corporation 2004, 2005""", "BRIAN PAUL, IBM") 41 return 42 43 44 def get_stack_size(self, f): 45 size = 0 46 for p in f.parameterIterator(): 47 if p.is_padding: 48 continue 49 50 size += p.get_stack_size() 51 52 return size 53 54 55 def printRealHeader(self): 56 print '#include "x86/assyntax.h"' 57 print '' 58 print '#if defined(STDCALL_API)' 59 print '# if defined(USE_MGL_NAMESPACE)' 60 print '# define GL_PREFIX(n,n2) GLNAME(CONCAT(mgl,n2))' 61 print '# else' 62 print '# define GL_PREFIX(n,n2) GLNAME(CONCAT(gl,n2))' 63 print '# endif' 64 print '#else' 65 print '# if defined(USE_MGL_NAMESPACE)' 66 print '# define GL_PREFIX(n,n2) GLNAME(CONCAT(mgl,n))' 67 print '# define _glapi_Dispatch _mglapi_Dispatch' 68 print '# else' 69 print '# define GL_PREFIX(n,n2) GLNAME(CONCAT(gl,n))' 70 print '# endif' 71 print '#endif' 72 print '' 73 print '#define GL_OFFSET(x) CODEPTR(REGOFF(4 * x, EAX))' 74 print '' 75 print '#if defined(GNU_ASSEMBLER) && !defined(__MINGW32__) && !defined(__APPLE__)' 76 print '#define GLOBL_FN(x) GLOBL x ; .type x, @function' 77 print '#else' 78 print '#define GLOBL_FN(x) GLOBL x' 79 print '#endif' 80 print '' 81 print '' 82 print '#ifdef GLX_USE_TLS' 83 print '' 84 print '#ifdef GLX_X86_READONLY_TEXT' 85 print '# define CTX_INSNS MOV_L(GS:(EAX), EAX)' 86 print '#else' 87 print '# define CTX_INSNS NOP /* Pad for init_glapi_relocs() */' 88 print '#endif' 89 print '' 90 print '# define GL_STUB(fn,off,fn_alt)\t\t\t\\' 91 print 'ALIGNTEXT16;\t\t\t\t\t\t\\' 92 print 'GLOBL_FN(GL_PREFIX(fn, fn_alt));\t\t\t\\' 93 print 'GL_PREFIX(fn, fn_alt):\t\t\t\t\t\\' 94 print '\tCALL(_x86_get_dispatch) ;\t\t\t\\' 95 print '\tCTX_INSNS ; \\' 96 print '\tJMP(GL_OFFSET(off))' 97 print '' 98 print '#elif defined(HAVE_PTHREAD)' 99 print '# define GL_STUB(fn,off,fn_alt)\t\t\t\\' 100 print 'ALIGNTEXT16;\t\t\t\t\t\t\\' 101 print 'GLOBL_FN(GL_PREFIX(fn, fn_alt));\t\t\t\\' 102 print 'GL_PREFIX(fn, fn_alt):\t\t\t\t\t\\' 103 print '\tMOV_L(CONTENT(GLNAME(_glapi_Dispatch)), EAX) ;\t\\' 104 print '\tTEST_L(EAX, EAX) ;\t\t\t\t\\' 105 print '\tJE(1f) ;\t\t\t\t\t\\' 106 print '\tJMP(GL_OFFSET(off)) ;\t\t\t\t\\' 107 print '1:\tCALL(_x86_get_dispatch) ;\t\t\t\\' 108 print '\tJMP(GL_OFFSET(off))' 109 print '#else' 110 print '# define GL_STUB(fn,off,fn_alt)\t\t\t\\' 111 print 'ALIGNTEXT16;\t\t\t\t\t\t\\' 112 print 'GLOBL_FN(GL_PREFIX(fn, fn_alt));\t\t\t\\' 113 print 'GL_PREFIX(fn, fn_alt):\t\t\t\t\t\\' 114 print '\tMOV_L(CONTENT(GLNAME(_glapi_Dispatch)), EAX) ;\t\\' 115 print '\tTEST_L(EAX, EAX) ;\t\t\t\t\\' 116 print '\tJE(1f) ;\t\t\t\t\t\\' 117 print '\tJMP(GL_OFFSET(off)) ;\t\t\t\t\\' 118 print '1:\tCALL(_glapi_get_dispatch) ;\t\t\t\\' 119 print '\tJMP(GL_OFFSET(off))' 120 print '#endif' 121 print '' 122 print '#ifdef HAVE_FUNC_ATTRIBUTE_ALIAS' 123 print '# define GL_STUB_ALIAS(fn,off,fn_alt,alias,alias_alt)\t\\' 124 print '\t.globl\tGL_PREFIX(fn, fn_alt) ;\t\t\t\\' 125 print '\t.set\tGL_PREFIX(fn, fn_alt), GL_PREFIX(alias, alias_alt)' 126 print '#else' 127 print '# define GL_STUB_ALIAS(fn,off,fn_alt,alias,alias_alt)\t\\' 128 print ' GL_STUB(fn, off, fn_alt)' 129 print '#endif' 130 print '' 131 print 'SEG_TEXT' 132 print '' 133 print '#ifdef GLX_USE_TLS' 134 print '' 135 print '\tGLOBL\tGLNAME(_x86_get_dispatch)' 136 print '\tHIDDEN(GLNAME(_x86_get_dispatch))' 137 print 'ALIGNTEXT16' 138 print 'GLNAME(_x86_get_dispatch):' 139 print '\tcall 1f' 140 print '1:\tpopl %eax' 141 print '\taddl $_GLOBAL_OFFSET_TABLE_+[.-1b], %eax' 142 print '\tmovl _glapi_tls_Dispatch@GOTNTPOFF(%eax), %eax' 143 print '\tret' 144 print '' 145 print '#elif defined(HAVE_PTHREAD)' 146 print 'EXTERN GLNAME(_glapi_Dispatch)' 147 print 'EXTERN GLNAME(_gl_DispatchTSD)' 148 print 'EXTERN GLNAME(pthread_getspecific)' 149 print '' 150 print 'ALIGNTEXT16' 151 print 'GLNAME(_x86_get_dispatch):' 152 print '\tSUB_L(CONST(24), ESP)' 153 print '\tPUSH_L(GLNAME(_gl_DispatchTSD))' 154 print '\tCALL(GLNAME(pthread_getspecific))' 155 print '\tADD_L(CONST(28), ESP)' 156 print '\tRET' 157 print '#else' 158 print 'EXTERN GLNAME(_glapi_get_dispatch)' 159 print '#endif' 160 print '' 161 162 print '#if defined( GLX_USE_TLS ) && !defined( GLX_X86_READONLY_TEXT )' 163 print '\t\t.section\twtext, "awx", @progbits' 164 print '#endif /* defined( GLX_USE_TLS ) */' 165 166 print '' 167 print '\t\tALIGNTEXT16' 168 print '\t\tGLOBL GLNAME(gl_dispatch_functions_start)' 169 print '\t\tHIDDEN(GLNAME(gl_dispatch_functions_start))' 170 print 'GLNAME(gl_dispatch_functions_start):' 171 print '' 172 return 173 174 175 def printRealFooter(self): 176 print '' 177 print '\t\tGLOBL\tGLNAME(gl_dispatch_functions_end)' 178 print '\t\tHIDDEN(GLNAME(gl_dispatch_functions_end))' 179 print '\t\tALIGNTEXT16' 180 print 'GLNAME(gl_dispatch_functions_end):' 181 print '' 182 print '#if defined (__ELF__) && defined (__linux__)' 183 print ' .section .note.GNU-stack,"",%progbits' 184 print '#endif' 185 return 186 187 188 def printBody(self, api): 189 for f in api.functionIterateByOffset(): 190 name = f.dispatch_name() 191 stack = self.get_stack_size(f) 192 alt = "%s@%u" % (name, stack) 193 194 print '\tGL_STUB(%s, %d, %s)' % (name, f.offset, alt) 195 196 if not f.is_static_entry_point(f.name): 197 print '\tHIDDEN(GL_PREFIX(%s, %s))' % (name, alt) 198 199 200 for f in api.functionIterateByOffset(): 201 name = f.dispatch_name() 202 stack = self.get_stack_size(f) 203 alt = "%s@%u" % (name, stack) 204 205 for n in f.entry_points: 206 if f.is_static_entry_point(n): 207 if n != f.name: 208 alt2 = "%s@%u" % (n, stack) 209 text = '\tGL_STUB_ALIAS(%s, %d, %s, %s, %s)' % (n, f.offset, alt2, name, alt) 210 211 if f.has_different_protocol(n): 212 print '#ifndef GLX_INDIRECT_RENDERING' 213 print text 214 print '#endif' 215 else: 216 print text 217 218 return 219 220def _parser(): 221 parser = argparse.ArgumentParser() 222 parser.add_argument('-f', 223 dest='filename', 224 default='gl_API.xml', 225 help='An XML file describing an API.') 226 return parser.parse_args() 227 228 229def main(): 230 args = _parser() 231 printer = PrintGenericStubs() 232 233 api = gl_XML.parse_GL_API(args.filename, glX_XML.glx_item_factory()) 234 printer.Print(api) 235 236 237if __name__ == '__main__': 238 main() 239