src/mapi/glapi/gen/gl_x86_asm.py

   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
  27 from __future__ import print_function
  28
  29 import argparse
  30
  31 import license
  32 import gl_XML, glX_XML
  33
  34 class 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
 213 def _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
 222 def 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
 230 if __name__ == '__main__':
 231     main()