src/mapi/glapi/gen/gl_x86_asm.py

   1 #!/usr/bin/env python
   2
   3 # (C) Copyright IBM Corporation 2004, 2005
   4 # All Rights Reserved.
   5 #
   6 # Permission is hereby granted, free of charge, to any person obtaining a
   7 # copy of this software and associated documentation files (the "Software"),
   8 # to deal in the Software without restriction, including without limitation
   9 # on the rights to use, copy, modify, merge, publish, distribute, sub
  10 # license, and/or sell copies of the Software, and to permit persons to whom
  11 # the Software is furnished to do so, subject to the following conditions:
  12 #
  13 # The above copyright notice and this permission notice (including the next
  14 # paragraph) shall be included in all copies or substantial portions of the
  15 # Software.
  16 #
  17 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19 # FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
  20 # IBM AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  22 # FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  23 # IN THE SOFTWARE.
  24 #
  25 # Authors:
  26 #    Ian Romanick <idr@us.ibm.com>
  27
  28 import argparse
  29
  30 import license
  31 import gl_XML, glX_XML
  32
  33 class PrintGenericStubs(gl_XML.gl_print_base):
  34
  35     def __init__(self):
  36         gl_XML.gl_print_base.__init__(self)
  37
  38         self.name = "gl_x86_asm.py (from Mesa)"
  39         self.license = license.bsd_license_template % ( \
  40 """Copyright (C) 1999-2001  Brian Paul   All Rights Reserved.
  41 (C) Copyright IBM Corporation 2004, 2005""", "BRIAN PAUL, IBM")
  42         return
  43
  44
  45     def get_stack_size(self, f):
  46         size = 0
  47         for p in f.parameterIterator():
  48             if p.is_padding:
  49                 continue
  50
  51             size += p.get_stack_size()
  52
  53         return size
  54
  55
  56     def printRealHeader(self):
  57         print '#include "x86/assyntax.h"'
  58         print ''
  59         print '#if defined(STDCALL_API)'
  60         print '# if defined(USE_MGL_NAMESPACE)'
  61         print '#  define GL_PREFIX(n,n2) GLNAME(CONCAT(mgl,n2))'
  62         print '# else'
  63         print '#  define GL_PREFIX(n,n2) GLNAME(CONCAT(gl,n2))'
  64         print '# endif'
  65         print '#else'
  66         print '# if defined(USE_MGL_NAMESPACE)'
  67         print '#  define GL_PREFIX(n,n2) GLNAME(CONCAT(mgl,n))'
  68         print '#  define _glapi_Dispatch _mglapi_Dispatch'
  69         print '# else'
  70         print '#  define GL_PREFIX(n,n2) GLNAME(CONCAT(gl,n))'
  71         print '# endif'
  72         print '#endif'
  73         print ''
  74         print '#define GL_OFFSET(x) CODEPTR(REGOFF(4 * x, EAX))'
  75         print ''
  76         print '#if defined(GNU_ASSEMBLER) && !defined(__MINGW32__) && !defined(__APPLE__)'
  77         print '#define GLOBL_FN(x) GLOBL x ; .type x, @function'
  78         print '#else'
  79         print '#define GLOBL_FN(x) GLOBL x'
  80         print '#endif'
  81         print ''
  82         print ''
  83         print '#ifdef GLX_USE_TLS'
  84         print ''
  85         print '#ifdef GLX_X86_READONLY_TEXT'
  86         print '# define CTX_INSNS MOV_L(GS:(EAX), EAX)'
  87         print '#else'
  88         print '# define CTX_INSNS NOP /* Pad for init_glapi_relocs() */'
  89         print '#endif'
  90         print ''
  91         print '#  define GL_STUB(fn,off,fn_alt)\t\t\t\\'
  92         print 'ALIGNTEXT16;\t\t\t\t\t\t\\'
  93         print 'GLOBL_FN(GL_PREFIX(fn, fn_alt));\t\t\t\\'
  94         print 'GL_PREFIX(fn, fn_alt):\t\t\t\t\t\\'
  95         print '\tCALL(_x86_get_dispatch) ;\t\t\t\\'
  96         print '\tCTX_INSNS ;                                    \\'
  97         print '\tJMP(GL_OFFSET(off))'
  98         print ''
  99         print '#elif defined(HAVE_PTHREAD)'
 100         print '#  define GL_STUB(fn,off,fn_alt)\t\t\t\\'
 101         print 'ALIGNTEXT16;\t\t\t\t\t\t\\'
 102         print 'GLOBL_FN(GL_PREFIX(fn, fn_alt));\t\t\t\\'
 103         print 'GL_PREFIX(fn, fn_alt):\t\t\t\t\t\\'
 104         print '\tMOV_L(CONTENT(GLNAME(_glapi_Dispatch)), EAX) ;\t\\'
 105         print '\tTEST_L(EAX, EAX) ;\t\t\t\t\\'
 106         print '\tJE(1f) ;\t\t\t\t\t\\'
 107         print '\tJMP(GL_OFFSET(off)) ;\t\t\t\t\\'
 108         print '1:\tCALL(_x86_get_dispatch) ;\t\t\t\\'
 109         print '\tJMP(GL_OFFSET(off))'
 110         print '#else'
 111         print '#  define GL_STUB(fn,off,fn_alt)\t\t\t\\'
 112         print 'ALIGNTEXT16;\t\t\t\t\t\t\\'
 113         print 'GLOBL_FN(GL_PREFIX(fn, fn_alt));\t\t\t\\'
 114         print 'GL_PREFIX(fn, fn_alt):\t\t\t\t\t\\'
 115         print '\tMOV_L(CONTENT(GLNAME(_glapi_Dispatch)), EAX) ;\t\\'
 116         print '\tTEST_L(EAX, EAX) ;\t\t\t\t\\'
 117         print '\tJE(1f) ;\t\t\t\t\t\\'
 118         print '\tJMP(GL_OFFSET(off)) ;\t\t\t\t\\'
 119         print '1:\tCALL(_glapi_get_dispatch) ;\t\t\t\\'
 120         print '\tJMP(GL_OFFSET(off))'
 121         print '#endif'
 122         print ''
 123         print '#ifdef HAVE_ALIAS'
 124         print '#  define GL_STUB_ALIAS(fn,off,fn_alt,alias,alias_alt)\t\\'
 125         print '\t.globl\tGL_PREFIX(fn, fn_alt) ;\t\t\t\\'
 126         print '\t.set\tGL_PREFIX(fn, fn_alt), GL_PREFIX(alias, alias_alt)'
 127         print '#else'
 128         print '#  define GL_STUB_ALIAS(fn,off,fn_alt,alias,alias_alt)\t\\'
 129         print '    GL_STUB(fn, off, fn_alt)'
 130         print '#endif'
 131         print ''
 132         print 'SEG_TEXT'
 133         print ''
 134         print '#ifdef GLX_USE_TLS'
 135         print ''
 136         print '\tGLOBL\tGLNAME(_x86_get_dispatch)'
 137         print '\tHIDDEN(GLNAME(_x86_get_dispatch))'
 138         print 'ALIGNTEXT16'
 139         print 'GLNAME(_x86_get_dispatch):'
 140         print '\tcall   1f'
 141         print '1:\tpopl %eax'
 142         print '\taddl   $_GLOBAL_OFFSET_TABLE_+[.-1b], %eax'
 143         print '\tmovl   _glapi_tls_Dispatch@GOTNTPOFF(%eax), %eax'
 144         print '\tret'
 145         print ''
 146         print '#elif defined(HAVE_PTHREAD)'
 147         print 'EXTERN GLNAME(_glapi_Dispatch)'
 148         print 'EXTERN GLNAME(_gl_DispatchTSD)'
 149         print 'EXTERN GLNAME(pthread_getspecific)'
 150         print ''
 151         print 'ALIGNTEXT16'
 152         print 'GLNAME(_x86_get_dispatch):'
 153         print '\tSUB_L(CONST(24), ESP)'
 154         print '\tPUSH_L(GLNAME(_gl_DispatchTSD))'
 155         print '\tCALL(GLNAME(pthread_getspecific))'
 156         print '\tADD_L(CONST(28), ESP)'
 157         print '\tRET'
 158         print '#else'
 159         print 'EXTERN GLNAME(_glapi_get_dispatch)'
 160         print '#endif'
 161         print ''
 162
 163         print '#if defined( GLX_USE_TLS ) && !defined( GLX_X86_READONLY_TEXT )'
 164         print '\t\t.section\twtext, "awx", @progbits'
 165         print '#endif /* defined( GLX_USE_TLS ) */'
 166
 167         print ''
 168         print '\t\tALIGNTEXT16'
 169         print '\t\tGLOBL GLNAME(gl_dispatch_functions_start)'
 170         print '\t\tHIDDEN(GLNAME(gl_dispatch_functions_start))'
 171         print 'GLNAME(gl_dispatch_functions_start):'
 172         print ''
 173         return
 174
 175
 176     def printRealFooter(self):
 177         print ''
 178         print '\t\tGLOBL\tGLNAME(gl_dispatch_functions_end)'
 179         print '\t\tHIDDEN(GLNAME(gl_dispatch_functions_end))'
 180         print '\t\tALIGNTEXT16'
 181         print 'GLNAME(gl_dispatch_functions_end):'
 182         print ''
 183         print '#if defined (__ELF__) && defined (__linux__)'
 184         print ' .section .note.GNU-stack,"",%progbits'
 185         print '#endif'
 186         return
 187
 188
 189     def printBody(self, api):
 190         for f in api.functionIterateByOffset():
 191             name = f.dispatch_name()
 192             stack = self.get_stack_size(f)
 193             alt = "%s@%u" % (name, stack)
 194
 195             print '\tGL_STUB(%s, %d, %s)' % (name, f.offset, alt)
 196
 197             if not f.is_static_entry_point(f.name):
 198                 print '\tHIDDEN(GL_PREFIX(%s, %s))' % (name, alt)
 199
 200
 201         for f in api.functionIterateByOffset():
 202             name = f.dispatch_name()
 203             stack = self.get_stack_size(f)
 204             alt = "%s@%u" % (name, stack)
 205
 206             for n in f.entry_points:
 207                 if f.is_static_entry_point(n):
 208                     if n != f.name:
 209                         alt2 = "%s@%u" % (n, stack)
 210                         text = '\tGL_STUB_ALIAS(%s, %d, %s, %s, %s)' % (n, f.offset, alt2, name, alt)
 211
 212                         if f.has_different_protocol(n):
 213                             print '#ifndef GLX_INDIRECT_RENDERING'
 214                             print text
 215                             print '#endif'
 216                         else:
 217                             print text
 218
 219         return
 220
 221 def _parser():
 222     parser = argparse.ArgumentParser()
 223     parser.add_argument('-f',
 224                         dest='filename',
 225                         default='gl_API.xml',
 226                         help='An XML file describing an API.')
 227     return parser.parse_args()
 228
 229
 230 def main():
 231     args = _parser()
 232     printer = PrintGenericStubs()
 233
 234     api = gl_XML.parse_GL_API(args.filename, glX_XML.glx_item_factory())
 235     printer.Print(api)
 236
 237
 238 if __name__ == '__main__':
 239     main()