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
27from __future__ import print_function
28
29import argparse
30
31import license
32import gl_XML, glX_XML
33
34class 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('# if defined(USE_MGL_NAMESPACE)')
62        print('#  define GL_PREFIX(n,n2) GLNAME(CONCAT(mgl,n2))')
63        print('# else')
64        print('#  define GL_PREFIX(n,n2) GLNAME(CONCAT(gl,n2))')
65        print('# endif')
66        print('#else')
67        print('# if defined(USE_MGL_NAMESPACE)')
68        print('#  define GL_PREFIX(n,n2) GLNAME(CONCAT(mgl,n))')
69        print('#  define _glapi_Dispatch _mglapi_Dispatch')
70        print('# else')
71        print('#  define GL_PREFIX(n,n2) GLNAME(CONCAT(gl,n))')
72        print('# endif')
73        print('#endif')
74        print('')
75        print('#define GL_OFFSET(x) CODEPTR(REGOFF(4 * x, EAX))')
76        print('')
77        print('#if defined(GNU_ASSEMBLER) && !defined(__MINGW32__) && !defined(__APPLE__)')
78        print('#define GLOBL_FN(x) GLOBL x ; .type x, @function')
79        print('#else')
80        print('#define GLOBL_FN(x) GLOBL x')
81        print('#endif')
82        print('')
83        print('')
84        print('#ifdef GLX_USE_TLS')
85        print('')
86        print('#ifdef GLX_X86_READONLY_TEXT')
87        print('# define CTX_INSNS MOV_L(GS:(EAX), EAX)')
88        print('#else')
89        print('# define CTX_INSNS NOP /* Pad for init_glapi_relocs() */')
90        print('#endif')
91        print('')
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('\tCALL(_x86_get_dispatch) ;\t\t\t\\')
97        print('\tCTX_INSNS ;					\\')
98        print('\tJMP(GL_OFFSET(off))')
99        print('')
100        print('#elif defined(HAVE_PTHREAD)')
101        print('#  define GL_STUB(fn,off,fn_alt)\t\t\t\\')
102        print('ALIGNTEXT16;\t\t\t\t\t\t\\')
103        print('GLOBL_FN(GL_PREFIX(fn, fn_alt));\t\t\t\\')
104        print('GL_PREFIX(fn, fn_alt):\t\t\t\t\t\\')
105        print('\tMOV_L(CONTENT(GLNAME(_glapi_Dispatch)), EAX) ;\t\\')
106        print('\tTEST_L(EAX, EAX) ;\t\t\t\t\\')
107        print('\tJE(1f) ;\t\t\t\t\t\\')
108        print('\tJMP(GL_OFFSET(off)) ;\t\t\t\t\\')
109        print('1:\tCALL(_x86_get_dispatch) ;\t\t\t\\')
110        print('\tJMP(GL_OFFSET(off))')
111        print('#else')
112        print('#  define GL_STUB(fn,off,fn_alt)\t\t\t\\')
113        print('ALIGNTEXT16;\t\t\t\t\t\t\\')
114        print('GLOBL_FN(GL_PREFIX(fn, fn_alt));\t\t\t\\')
115        print('GL_PREFIX(fn, fn_alt):\t\t\t\t\t\\')
116        print('\tMOV_L(CONTENT(GLNAME(_glapi_Dispatch)), EAX) ;\t\\')
117        print('\tTEST_L(EAX, EAX) ;\t\t\t\t\\')
118        print('\tJE(1f) ;\t\t\t\t\t\\')
119        print('\tJMP(GL_OFFSET(off)) ;\t\t\t\t\\')
120        print('1:\tCALL(_glapi_get_dispatch) ;\t\t\t\\')
121        print('\tJMP(GL_OFFSET(off))')
122        print('#endif')
123        print('')
124        print('#ifdef HAVE_FUNC_ATTRIBUTE_ALIAS')
125        print('#  define GL_STUB_ALIAS(fn,off,fn_alt,alias,alias_alt)\t\\')
126        print('\t.globl\tGL_PREFIX(fn, fn_alt) ;\t\t\t\\')
127        print('\t.set\tGL_PREFIX(fn, fn_alt), GL_PREFIX(alias, alias_alt)')
128        print('#else')
129        print('#  define GL_STUB_ALIAS(fn,off,fn_alt,alias,alias_alt)\t\\')
130        print('    GL_STUB(fn, off, fn_alt)')
131        print('#endif')
132        print('')
133        print('SEG_TEXT')
134        print('')
135        print('#ifdef GLX_USE_TLS')
136        print('')
137        print('\tGLOBL\tGLNAME(_x86_get_dispatch)')
138        print('\tHIDDEN(GLNAME(_x86_get_dispatch))')
139        print('ALIGNTEXT16')
140        print('GLNAME(_x86_get_dispatch):')
141        print('\tcall	1f')
142        print('1:\tpopl	%eax')
143        print('\taddl	$_GLOBAL_OFFSET_TABLE_+[.-1b], %eax')
144        print('\tmovl	_glapi_tls_Dispatch@GOTNTPOFF(%eax), %eax')
145        print('\tret')
146        print('')
147        print('#elif defined(HAVE_PTHREAD)')
148        print('EXTERN GLNAME(_glapi_Dispatch)')
149        print('EXTERN GLNAME(_gl_DispatchTSD)')
150        print('EXTERN GLNAME(pthread_getspecific)')
151        print('')
152        print('ALIGNTEXT16')
153        print('GLNAME(_x86_get_dispatch):')
154        print('\tSUB_L(CONST(24), ESP)')
155        print('\tPUSH_L(GLNAME(_gl_DispatchTSD))')
156        print('\tCALL(GLNAME(pthread_getspecific))')
157        print('\tADD_L(CONST(28), ESP)')
158        print('\tRET')
159        print('#else')
160        print('EXTERN GLNAME(_glapi_get_dispatch)')
161        print('#endif')
162        print('')
163
164        print('#if defined( GLX_USE_TLS ) && !defined( GLX_X86_READONLY_TEXT )')
165        print('\t\t.section\twtext, "awx", @progbits')
166        print('#endif /* defined( GLX_USE_TLS ) */')
167
168        print('')
169        print('\t\tALIGNTEXT16')
170        print('\t\tGLOBL GLNAME(gl_dispatch_functions_start)')
171        print('\t\tHIDDEN(GLNAME(gl_dispatch_functions_start))')
172        print('GLNAME(gl_dispatch_functions_start):')
173        print('')
174        return
175
176
177    def printRealFooter(self):
178        print('')
179        print('\t\tGLOBL\tGLNAME(gl_dispatch_functions_end)')
180        print('\t\tHIDDEN(GLNAME(gl_dispatch_functions_end))')
181        print('\t\tALIGNTEXT16')
182        print('GLNAME(gl_dispatch_functions_end):')
183        print('')
184        print('#if defined (__ELF__) && defined (__linux__)')
185        print('	.section .note.GNU-stack,"",%progbits')
186        print('#endif')
187        return
188
189
190    def printBody(self, api):
191        for f in api.functionIterateByOffset():
192            name = f.dispatch_name()
193            stack = self.get_stack_size(f)
194            alt = "%s@%u" % (name, stack)
195
196            print('\tGL_STUB(%s, %d, %s)' % (name, f.offset, alt))
197
198            if not f.is_static_entry_point(f.name):
199                print('\tHIDDEN(GL_PREFIX(%s, %s))' % (name, alt))
200
201
202        for f in api.functionIterateByOffset():
203            name = f.dispatch_name()
204            stack = self.get_stack_size(f)
205            alt = "%s@%u" % (name, stack)
206
207            for n in f.entry_points:
208                if f.is_static_entry_point(n):
209                    if n != f.name:
210                        alt2 = "%s@%u" % (n, stack)
211                        text = '\tGL_STUB_ALIAS(%s, %d, %s, %s, %s)' % (n, f.offset, alt2, name, alt)
212
213                        if f.has_different_protocol(n):
214                            print('#ifndef GLX_INDIRECT_RENDERING')
215                            print(text)
216                            print('#endif')
217                        else:
218                            print(text)
219
220        return
221
222def _parser():
223    parser = argparse.ArgumentParser()
224    parser.add_argument('-f',
225                        dest='filename',
226                        default='gl_API.xml',
227                        help='An XML file describing an API.')
228    return parser.parse_args()
229
230
231def main():
232    args = _parser()
233    printer = PrintGenericStubs()
234
235    api = gl_XML.parse_GL_API(args.filename, glX_XML.glx_item_factory())
236    printer.Print(api)
237
238
239if __name__ == '__main__':
240    main()
241