xref: /aosp_15_r20/external/mesa3d/src/mapi/glapi/gen/gl_x86_asm.py (revision 6104692788411f58d303aa86923a9ff6ecaded22) 
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 <[email protected]>
26
27import argparse
28
29import license
30import gl_XML, glX_XML
31
32class 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('#  define GL_PREFIX(n,n2) GLNAME(CONCAT(gl,n2))')
60        print('#else')
61        print('#  define GL_PREFIX(n,n2) GLNAME(CONCAT(gl,n))')
62        print('#endif')
63        print('')
64        print('#define GL_OFFSET(x) CODEPTR(REGOFF(4 * x, EAX))')
65        print('')
66        print('#if defined(GNU_ASSEMBLER) && !defined(__MINGW32__) && !defined(__APPLE__)')
67        print('#define GLOBL_FN(x) GLOBL x ; .type x, @function')
68        print('#else')
69        print('#define GLOBL_FN(x) GLOBL x')
70        print('#endif')
71        print('')
72        print('')
73        print('#ifdef REALLY_INITIAL_EXEC')
74        print('')
75        print('#ifdef GLX_X86_READONLY_TEXT')
76        print('# define CTX_INSNS MOV_L(GS:(EAX), EAX)')
77        print('#else')
78        print('# define CTX_INSNS NOP /* Pad for init_glapi_relocs() */')
79        print('#endif')
80        print('')
81        print('#  define GL_STUB(fn,off,fn_alt)\t\t\t\\')
82        print('ALIGNTEXT16;\t\t\t\t\t\t\\')
83        print('GLOBL_FN(GL_PREFIX(fn, fn_alt));\t\t\t\\')
84        print('GL_PREFIX(fn, fn_alt):\t\t\t\t\t\\')
85        print('\tCALL(_x86_get_dispatch) ;\t\t\t\\')
86        print('\tCTX_INSNS ;					\\')
87        print('\tJMP(GL_OFFSET(off))')
88        print('')
89        print('#else')
90        print('#  define GL_STUB(fn,off,fn_alt)\t\t\t\\')
91        print('ALIGNTEXT16;\t\t\t\t\t\t\\')
92        print('GLOBL_FN(GL_PREFIX(fn, fn_alt));\t\t\t\\')
93        print('GL_PREFIX(fn, fn_alt):\t\t\t\t\t\\')
94        print('\tMOV_L(CONTENT(GLNAME(_glapi_Dispatch)), EAX) ;\t\\')
95        print('\tTEST_L(EAX, EAX) ;\t\t\t\t\\')
96        print('\tJE(1f) ;\t\t\t\t\t\\')
97        print('\tJMP(GL_OFFSET(off)) ;\t\t\t\t\\')
98        print('1:\tCALL(_glapi_get_dispatch) ;\t\t\t\\')
99        print('\tJMP(GL_OFFSET(off))')
100        print('#endif')
101        print('')
102        print('#ifdef HAVE_FUNC_ATTRIBUTE_ALIAS')
103        print('#  define GL_STUB_ALIAS(fn,off,fn_alt,alias,alias_alt)\t\\')
104        print('\t.globl\tGL_PREFIX(fn, fn_alt) ;\t\t\t\\')
105        print('\t.set\tGL_PREFIX(fn, fn_alt), GL_PREFIX(alias, alias_alt)')
106        print('#else')
107        print('#  define GL_STUB_ALIAS(fn,off,fn_alt,alias,alias_alt)\t\\')
108        print('    GL_STUB(fn, off, fn_alt)')
109        print('#endif')
110        print('')
111        print('SEG_TEXT')
112        print('')
113        print('#ifdef REALLY_INITIAL_EXEC')
114        print('')
115        print('\tGLOBL\tGLNAME(_x86_get_dispatch)')
116        print('\tHIDDEN(GLNAME(_x86_get_dispatch))')
117        print('ALIGNTEXT16')
118        print('GLNAME(_x86_get_dispatch):')
119        print('\tcall	1f')
120        print('1:\tpopl	%eax')
121        print('\taddl	$_GLOBAL_OFFSET_TABLE_+[.-1b], %eax')
122        print('\tmovl	_glapi_tls_Dispatch@GOTNTPOFF(%eax), %eax')
123        print('\tret')
124        print('')
125        print('#else')
126        print('EXTERN GLNAME(_glapi_Dispatch)')
127        print('EXTERN GLNAME(_glapi_get_dispatch)')
128        print('#endif')
129        print('')
130
131        print('#if !defined( GLX_X86_READONLY_TEXT )')
132        print('\t\t.section\twtext, "awx", @progbits')
133        print('#endif /* !defined( GLX_X86_READONLY_TEXT ) */')
134
135        print('')
136        print('\t\tALIGNTEXT16')
137        print('\t\tGLOBL GLNAME(gl_dispatch_functions_start)')
138        print('\t\tHIDDEN(GLNAME(gl_dispatch_functions_start))')
139        print('GLNAME(gl_dispatch_functions_start):')
140        print('')
141        return
142
143
144    def printRealFooter(self):
145        print('')
146        print('\t\tGLOBL\tGLNAME(gl_dispatch_functions_end)')
147        print('\t\tHIDDEN(GLNAME(gl_dispatch_functions_end))')
148        print('\t\tALIGNTEXT16')
149        print('GLNAME(gl_dispatch_functions_end):')
150        print('')
151        print('#if defined (__ELF__) && defined (__linux__)')
152        print('	.section .note.GNU-stack,"",%progbits')
153        print('#endif')
154        return
155
156
157    def printBody(self, api):
158        for f in api.functionIterateByOffset():
159            name = f.dispatch_name()
160            stack = self.get_stack_size(f)
161            alt = "%s@%u" % (name, stack)
162
163            print('\tGL_STUB(%s, %d, %s)' % (name, f.offset, alt))
164
165            if not f.is_static_entry_point(f.name):
166                print('\tHIDDEN(GL_PREFIX(%s, %s))' % (name, alt))
167
168
169        for f in api.functionIterateByOffset():
170            name = f.dispatch_name()
171            stack = self.get_stack_size(f)
172            alt = "%s@%u" % (name, stack)
173
174            for n in f.entry_points:
175                if f.is_static_entry_point(n):
176                    if n != f.name:
177                        alt2 = "%s@%u" % (n, stack)
178                        text = '\tGL_STUB_ALIAS(%s, %d, %s, %s, %s)' % (n, f.offset, alt2, name, alt)
179
180                        if f.has_different_protocol(n):
181                            print('#if GLAPI_EXPORT_PROTO_ENTRY_POINTS')
182                            print(text)
183                            print('#endif')
184                        else:
185                            print(text)
186
187        return
188
189def _parser():
190    parser = argparse.ArgumentParser()
191    parser.add_argument('-f',
192                        dest='filename',
193                        default='gl_API.xml',
194                        help='An XML file describing an API.')
195    return parser.parse_args()
196
197
198def main():
199    args = _parser()
200    printer = PrintGenericStubs()
201
202    api = gl_XML.parse_GL_API(args.filename, glX_XML.glx_item_factory())
203    printer.Print(api)
204
205
206if __name__ == '__main__':
207    main()
208