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 license
  29 import gl_XML, glX_XML
  30 import sys, getopt
  31
  32 class 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(__DJGPP__) && !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 '#if defined(HAVE_PTHREAD) || defined(_WIN32)'
  82         print '#  define THREADS'
  83         print '#endif'
  84         print ''
  85         print '#ifdef GLX_USE_TLS'
  86         print ''
  87         print '#ifdef GLX_X86_READONLY_TEXT'
  88         print '# define CTX_INSNS MOV_L(GS:(EAX), EAX)'
  89         print '#else'
  90         print '# define CTX_INSNS NOP /* Pad for init_glapi_relocs() */'
  91         print '#endif'
  92         print ''
  93         print '#  define GL_STUB(fn,off,fn_alt)\t\t\t\\'
  94         print 'ALIGNTEXT16;\t\t\t\t\t\t\\'
  95         print 'GLOBL_FN(GL_PREFIX(fn, fn_alt));\t\t\t\\'
  96         print 'GL_PREFIX(fn, fn_alt):\t\t\t\t\t\\'
  97         print '\tCALL(_x86_get_dispatch) ;\t\t\t\\'
  98         print '\tCTX_INSNS ;                                    \\'
  99         print '\tJMP(GL_OFFSET(off))'
 100         print ''
 101         print '#elif defined(HAVE_PTHREAD)'
 102         print '#  define GL_STUB(fn,off,fn_alt)\t\t\t\\'
 103         print 'ALIGNTEXT16;\t\t\t\t\t\t\\'
 104         print 'GLOBL_FN(GL_PREFIX(fn, fn_alt));\t\t\t\\'
 105         print 'GL_PREFIX(fn, fn_alt):\t\t\t\t\t\\'
 106         print '\tMOV_L(CONTENT(GLNAME(_glapi_Dispatch)), EAX) ;\t\\'
 107         print '\tTEST_L(EAX, EAX) ;\t\t\t\t\\'
 108         print '\tJE(1f) ;\t\t\t\t\t\\'
 109         print '\tJMP(GL_OFFSET(off)) ;\t\t\t\t\\'
 110         print '1:\tCALL(_x86_get_dispatch) ;\t\t\t\\'
 111         print '\tJMP(GL_OFFSET(off))'
 112         print '#elif defined(THREADS)'
 113         print '#  define GL_STUB(fn,off,fn_alt)\t\t\t\\'
 114         print 'ALIGNTEXT16;\t\t\t\t\t\t\\'
 115         print 'GLOBL_FN(GL_PREFIX(fn, fn_alt));\t\t\t\\'
 116         print 'GL_PREFIX(fn, fn_alt):\t\t\t\t\t\\'
 117         print '\tMOV_L(CONTENT(GLNAME(_glapi_Dispatch)), EAX) ;\t\\'
 118         print '\tTEST_L(EAX, EAX) ;\t\t\t\t\\'
 119         print '\tJE(1f) ;\t\t\t\t\t\\'
 120         print '\tJMP(GL_OFFSET(off)) ;\t\t\t\t\\'
 121         print '1:\tCALL(_glapi_get_dispatch) ;\t\t\t\\'
 122         print '\tJMP(GL_OFFSET(off))'
 123         print '#else /* Non-threaded version. */'
 124         print '#  define GL_STUB(fn,off,fn_alt)\t\t\t\\'
 125         print 'ALIGNTEXT16;\t\t\t\t\t\t\\'
 126         print 'GLOBL_FN(GL_PREFIX(fn, fn_alt));\t\t\t\\'
 127         print 'GL_PREFIX(fn, fn_alt):\t\t\t\t\t\\'
 128         print '\tMOV_L(CONTENT(GLNAME(_glapi_Dispatch)), EAX) ;\t\\'
 129         print '\tJMP(GL_OFFSET(off))'
 130         print '#endif'
 131         print ''
 132         print '#ifdef HAVE_ALIAS'
 133         print '#  define GL_STUB_ALIAS(fn,off,fn_alt,alias,alias_alt)\t\\'
 134         print '\t.globl\tGL_PREFIX(fn, fn_alt) ;\t\t\t\\'
 135         print '\t.set\tGL_PREFIX(fn, fn_alt), GL_PREFIX(alias, alias_alt)'
 136         print '#else'
 137         print '#  define GL_STUB_ALIAS(fn,off,fn_alt,alias,alias_alt)\t\\'
 138         print '    GL_STUB(fn, off, fn_alt)'
 139         print '#endif'
 140         print ''
 141         print 'SEG_TEXT'
 142         print ''
 143         print '#ifdef GLX_USE_TLS'
 144         print ''
 145         print '\tGLOBL\tGLNAME(_x86_get_dispatch)'
 146         print '\tHIDDEN(GLNAME(_x86_get_dispatch))'
 147         print 'ALIGNTEXT16'
 148         print 'GLNAME(_x86_get_dispatch):'
 149         print '\tcall   1f'
 150         print '1:\tpopl %eax'
 151         print '\taddl   $_GLOBAL_OFFSET_TABLE_+[.-1b], %eax'
 152         print '\tmovl   _glapi_tls_Dispatch@GOTNTPOFF(%eax), %eax'
 153         print '\tret'
 154         print ''
 155         print '#elif defined(HAVE_PTHREAD)'
 156         print 'EXTERN GLNAME(_glapi_Dispatch)'
 157         print 'EXTERN GLNAME(_gl_DispatchTSD)'
 158         print 'EXTERN GLNAME(pthread_getspecific)'
 159         print ''
 160         print 'ALIGNTEXT16'
 161         print 'GLNAME(_x86_get_dispatch):'
 162         print '\tSUB_L(CONST(24), ESP)'
 163         print '\tPUSH_L(GLNAME(_gl_DispatchTSD))'
 164         print '\tCALL(GLNAME(pthread_getspecific))'
 165         print '\tADD_L(CONST(28), ESP)'
 166         print '\tRET'
 167         print '#elif defined(THREADS)'
 168         print 'EXTERN GLNAME(_glapi_get_dispatch)'
 169         print '#endif'
 170         print ''
 171
 172         print '#if defined( GLX_USE_TLS ) && !defined( GLX_X86_READONLY_TEXT )'
 173         print '\t\t.section\twtext, "awx", @progbits'
 174         print '#endif /* defined( GLX_USE_TLS ) */'
 175
 176         print ''
 177         print '\t\tALIGNTEXT16'
 178         print '\t\tGLOBL GLNAME(gl_dispatch_functions_start)'
 179         print '\t\tHIDDEN(GLNAME(gl_dispatch_functions_start))'
 180         print 'GLNAME(gl_dispatch_functions_start):'
 181         print ''
 182         return
 183
 184
 185     def printRealFooter(self):
 186         print ''
 187         print '\t\tGLOBL\tGLNAME(gl_dispatch_functions_end)'
 188         print '\t\tHIDDEN(GLNAME(gl_dispatch_functions_end))'
 189         print '\t\tALIGNTEXT16'
 190         print 'GLNAME(gl_dispatch_functions_end):'
 191         print ''
 192         print '#if defined (__ELF__) && defined (__linux__)'
 193         print ' .section .note.GNU-stack,"",%progbits'
 194         print '#endif'
 195         return
 196
 197
 198     def printBody(self, api):
 199         for f in api.functionIterateByOffset():
 200             name = f.dispatch_name()
 201             stack = self.get_stack_size(f)
 202             alt = "%s@%u" % (name, stack)
 203
 204             print '\tGL_STUB(%s, %d, %s)' % (name, f.offset, alt)
 205
 206             if not f.is_static_entry_point(f.name):
 207                 print '\tHIDDEN(GL_PREFIX(%s, %s))' % (name, alt)
 208
 209
 210         for f in api.functionIterateByOffset():
 211             name = f.dispatch_name()
 212             stack = self.get_stack_size(f)
 213             alt = "%s@%u" % (name, stack)
 214
 215             for n in f.entry_points:
 216                 if f.is_static_entry_point(n):
 217                     if n != f.name:
 218                         alt2 = "%s@%u" % (n, stack)
 219                         text = '\tGL_STUB_ALIAS(%s, %d, %s, %s, %s)' % (n, f.offset, alt2, name, alt)
 220
 221                         if f.has_different_protocol(n):
 222                             print '#ifndef GLX_INDIRECT_RENDERING'
 223                             print text
 224                             print '#endif'
 225                         else:
 226                             print text
 227
 228         return
 229
 230 def show_usage():
 231     print "Usage: %s [-f input_file_name] [-m output_mode]" % sys.argv[0]
 232     sys.exit(1)
 233
 234 if __name__ == '__main__':
 235     file_name = "gl_API.xml"
 236     mode = "generic"
 237
 238     try:
 239         (args, trail) = getopt.getopt(sys.argv[1:], "m:f:")
 240     except Exception,e:
 241         show_usage()
 242
 243     for (arg,val) in args:
 244         if arg == '-m':
 245             mode = val
 246         elif arg == "-f":
 247             file_name = val
 248
 249     if mode == "generic":
 250         printer = PrintGenericStubs()
 251     else:
 252         print "ERROR: Invalid mode \"%s\" specified." % mode
 253         show_usage()
 254
 255     api = gl_XML.parse_GL_API(file_name, glX_XML.glx_item_factory())
 256     printer.Print(api)