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