208 lines
7.2 KiB
Python
208 lines
7.2 KiB
Python
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# (C) Copyright IBM Corporation 2004, 2005
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# All Rights Reserved.
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#
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# Permission is hereby granted, free of charge, to any person obtaining a
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# copy of this software and associated documentation files (the "Software"),
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# to deal in the Software without restriction, including without limitation
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# on the rights to use, copy, modify, merge, publish, distribute, sub
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# license, and/or sell copies of the Software, and to permit persons to whom
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# the Software is furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice (including the next
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# paragraph) shall be included in all copies or substantial portions of the
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# Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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# IBM AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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# IN THE SOFTWARE.
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#
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# Authors:
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# Ian Romanick <idr@us.ibm.com>
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import argparse
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import license
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import gl_XML, glX_XML
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class PrintGenericStubs(gl_XML.gl_print_base):
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def __init__(self):
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gl_XML.gl_print_base.__init__(self)
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self.name = "gl_x86_asm.py (from Mesa)"
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self.license = license.bsd_license_template % ( \
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"""Copyright (C) 1999-2001 Brian Paul All Rights Reserved.
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(C) Copyright IBM Corporation 2004, 2005""", "BRIAN PAUL, IBM")
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return
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def get_stack_size(self, f):
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size = 0
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for p in f.parameterIterator():
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if p.is_padding:
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continue
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size += p.get_stack_size()
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return size
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def printRealHeader(self):
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print('#include "x86/assyntax.h"')
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print('')
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print('#if defined(STDCALL_API)')
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print('# define GL_PREFIX(n,n2) GLNAME(CONCAT(gl,n2))')
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print('#else')
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print('# define GL_PREFIX(n,n2) GLNAME(CONCAT(gl,n))')
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print('#endif')
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print('')
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print('#define GL_OFFSET(x) CODEPTR(REGOFF(4 * x, EAX))')
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print('')
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print('#if defined(GNU_ASSEMBLER) && !defined(__MINGW32__) && !defined(__APPLE__)')
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print('#define GLOBL_FN(x) GLOBL x ; .type x, @function')
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print('#else')
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print('#define GLOBL_FN(x) GLOBL x')
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print('#endif')
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print('')
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print('')
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print('#ifdef REALLY_INITIAL_EXEC')
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print('')
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print('#ifdef GLX_X86_READONLY_TEXT')
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print('# define CTX_INSNS MOV_L(GS:(EAX), EAX)')
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print('#else')
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print('# define CTX_INSNS NOP /* Pad for init_glapi_relocs() */')
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print('#endif')
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print('')
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print('# define GL_STUB(fn,off,fn_alt)\t\t\t\\')
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print('ALIGNTEXT16;\t\t\t\t\t\t\\')
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print('GLOBL_FN(GL_PREFIX(fn, fn_alt));\t\t\t\\')
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print('GL_PREFIX(fn, fn_alt):\t\t\t\t\t\\')
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print('\tCALL(_x86_get_dispatch) ;\t\t\t\\')
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print('\tCTX_INSNS ; \\')
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print('\tJMP(GL_OFFSET(off))')
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print('')
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print('#else')
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print('# define GL_STUB(fn,off,fn_alt)\t\t\t\\')
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print('ALIGNTEXT16;\t\t\t\t\t\t\\')
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print('GLOBL_FN(GL_PREFIX(fn, fn_alt));\t\t\t\\')
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print('GL_PREFIX(fn, fn_alt):\t\t\t\t\t\\')
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print('\tMOV_L(CONTENT(GLNAME(_glapi_Dispatch)), EAX) ;\t\\')
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print('\tTEST_L(EAX, EAX) ;\t\t\t\t\\')
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print('\tJE(1f) ;\t\t\t\t\t\\')
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print('\tJMP(GL_OFFSET(off)) ;\t\t\t\t\\')
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print('1:\tCALL(_glapi_get_dispatch) ;\t\t\t\\')
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print('\tJMP(GL_OFFSET(off))')
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print('#endif')
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print('')
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print('#ifdef HAVE_FUNC_ATTRIBUTE_ALIAS')
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print('# define GL_STUB_ALIAS(fn,off,fn_alt,alias,alias_alt)\t\\')
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print('\t.globl\tGL_PREFIX(fn, fn_alt) ;\t\t\t\\')
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print('\t.set\tGL_PREFIX(fn, fn_alt), GL_PREFIX(alias, alias_alt)')
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print('#else')
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print('# define GL_STUB_ALIAS(fn,off,fn_alt,alias,alias_alt)\t\\')
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print(' GL_STUB(fn, off, fn_alt)')
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print('#endif')
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print('')
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print('SEG_TEXT')
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print('')
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print('#ifdef REALLY_INITIAL_EXEC')
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print('')
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print('\tGLOBL\tGLNAME(_x86_get_dispatch)')
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print('\tHIDDEN(GLNAME(_x86_get_dispatch))')
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print('ALIGNTEXT16')
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print('GLNAME(_x86_get_dispatch):')
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print('\tcall 1f')
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print('1:\tpopl %eax')
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print('\taddl $_GLOBAL_OFFSET_TABLE_+[.-1b], %eax')
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print('\tmovl _glapi_tls_Dispatch@GOTNTPOFF(%eax), %eax')
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print('\tret')
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print('')
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print('#else')
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print('EXTERN GLNAME(_glapi_Dispatch)')
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print('EXTERN GLNAME(_glapi_get_dispatch)')
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print('#endif')
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print('')
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print('#if !defined( GLX_X86_READONLY_TEXT )')
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print('\t\t.section\twtext, "awx", @progbits')
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print('#endif /* !defined( GLX_X86_READONLY_TEXT ) */')
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print('')
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print('\t\tALIGNTEXT16')
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print('\t\tGLOBL GLNAME(gl_dispatch_functions_start)')
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print('\t\tHIDDEN(GLNAME(gl_dispatch_functions_start))')
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print('GLNAME(gl_dispatch_functions_start):')
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print('')
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return
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def printRealFooter(self):
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print('')
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print('\t\tGLOBL\tGLNAME(gl_dispatch_functions_end)')
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print('\t\tHIDDEN(GLNAME(gl_dispatch_functions_end))')
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print('\t\tALIGNTEXT16')
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print('GLNAME(gl_dispatch_functions_end):')
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print('')
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print('#if defined (__ELF__) && defined (__linux__)')
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print(' .section .note.GNU-stack,"",%progbits')
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print('#endif')
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return
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def printBody(self, api):
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for f in api.functionIterateByOffset():
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name = f.dispatch_name()
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stack = self.get_stack_size(f)
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alt = "%s@%u" % (name, stack)
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print('\tGL_STUB(%s, %d, %s)' % (name, f.offset, alt))
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if not f.is_static_entry_point(f.name):
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print('\tHIDDEN(GL_PREFIX(%s, %s))' % (name, alt))
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for f in api.functionIterateByOffset():
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name = f.dispatch_name()
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stack = self.get_stack_size(f)
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alt = "%s@%u" % (name, stack)
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for n in f.entry_points:
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if f.is_static_entry_point(n):
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if n != f.name:
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alt2 = "%s@%u" % (n, stack)
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text = '\tGL_STUB_ALIAS(%s, %d, %s, %s, %s)' % (n, f.offset, alt2, name, alt)
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if f.has_different_protocol(n):
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print('#ifndef GLX_INDIRECT_RENDERING')
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print(text)
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print('#endif')
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else:
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print(text)
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return
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def _parser():
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parser = argparse.ArgumentParser()
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parser.add_argument('-f',
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dest='filename',
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default='gl_API.xml',
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help='An XML file describing an API.')
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return parser.parse_args()
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def main():
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args = _parser()
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printer = PrintGenericStubs()
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api = gl_XML.parse_GL_API(args.filename, glX_XML.glx_item_factory())
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printer.Print(api)
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if __name__ == '__main__':
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main()
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