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(PTHREADS) || defined(WIN32_THREADS) || defined(BEOS_THREADS)'
  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(PTHREADS)'
 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(PTHREADS)'
 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(GLX_USE_TLS) && defined(__linux__)'
 193                 print ' .section ".note.ABI-tag", "a"'
 194                 print ' .p2align 2'
 195                 print ' .long   1f - 0f   /* name length */'
 196                 print ' .long   3f - 2f   /* data length */'
 197                 print ' .long   1         /* note length */'
 198                 print '0:       .asciz "GNU"      /* vendor name */'
 199                 print '1:       .p2align 2'
 200                 print '2:       .long   0         /* note data: the ABI tag */'
 201                 print ' .long   2,4,20    /* Minimum kernel version w/TLS */'
 202                 print '3:       .p2align 2        /* pad out section */'
 203                 print '#endif /* GLX_USE_TLS */'
 204                 print ''
 205                 print '#if defined (__ELF__) && defined (__linux__)'
 206                 print ' .section .note.GNU-stack,"",%progbits'
 207                 print '#endif'
 208                 return
 209
 210
 211         def printBody(self, api):
 212                 for f in api.functionIterateByOffset():
 213                         name = f.dispatch_name()
 214                         stack = self.get_stack_size(f)
 215                         alt = "%s@%u" % (name, stack)
 216
 217                         print '\tGL_STUB(%s, %d, %s)' % (name, f.offset, alt)
 218
 219                         if not f.is_static_entry_point(f.name):
 220                                 print '\tHIDDEN(GL_PREFIX(%s, %s))' % (name, alt)
 221
 222
 223                 for f in api.functionIterateByOffset():
 224                         name = f.dispatch_name()
 225                         stack = self.get_stack_size(f)
 226                         alt = "%s@%u" % (name, stack)
 227
 228                         for n in f.entry_points:
 229                                 if f.is_static_entry_point(n):
 230                                         if n != f.name:
 231                                                 alt2 = "%s@%u" % (n, stack)
 232                                                 text = '\tGL_STUB_ALIAS(%s, %d, %s, %s, %s)' % (n, f.offset, alt2, name, alt)
 233
 234                                                 if f.has_different_protocol(n):
 235                                                         print '#ifndef GLX_INDIRECT_RENDERING'
 236                                                         print text
 237                                                         print '#endif'
 238                                                 else:
 239                                                         print text
 240
 241                 return
 242
 243 def show_usage():
 244         print "Usage: %s [-f input_file_name] [-m output_mode]" % sys.argv[0]
 245         sys.exit(1)
 246
 247 if __name__ == '__main__':
 248         file_name = "gl_API.xml"
 249         mode = "generic"
 250
 251         try:
 252                 (args, trail) = getopt.getopt(sys.argv[1:], "m:f:")
 253         except Exception,e:
 254                 show_usage()
 255
 256         for (arg,val) in args:
 257                 if arg == '-m':
 258                         mode = val
 259                 elif arg == "-f":
 260                         file_name = val
 261
 262         if mode == "generic":
 263                 printer = PrintGenericStubs()
 264         else:
 265                 print "ERROR: Invalid mode \"%s\" specified." % mode
 266                 show_usage()
 267
 268         api = gl_XML.parse_GL_API(file_name, glX_XML.glx_item_factory())
 269         printer.Print(api)