| 1 | """
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| 2 | Copyright (C) 2018-2022 Oracle Corporation
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| 3 |
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| 4 | This file is part of VirtualBox Open Source Edition (OSE), as
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| 5 | available from http://www.virtualbox.org. This file is free software;
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| 6 | you can redistribute it and/or modify it under the terms of the GNU
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| 7 | General Public License (GPL) as published by the Free Software
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| 8 | Foundation, in version 2 as it comes in the "COPYING" file of the
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| 9 | VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 10 | hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 11 | """
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| 12 |
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| 13 | import sys
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| 14 |
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| 15 | def GenerateForwarders():
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| 16 |
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| 17 | # Get list of functions.
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| 18 | exports_file = open(sys.argv[1], "r")
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| 19 | if not exports_file:
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| 20 | print("Error: couldn't open %s file!" % filename)
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| 21 | sys.exit()
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| 22 |
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| 23 | names = []
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| 24 | cbArgs = []
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| 25 | for line in exports_file.readlines():
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| 26 | line = line.strip()
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| 27 | if len(line) > 0 and line[0] != ';' and line != 'EXPORTS':
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| 28 | # Parse 'glAccum = glAccum@8'
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| 29 | words = line.split('=', 1)
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| 30 |
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| 31 | # Function name
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| 32 | names.append(words[0].strip())
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| 33 |
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| 34 | # Size of arguments in bytes
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| 35 | words = words[1].split('@')
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| 36 | cbArgs.append(words[1].strip())
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| 37 |
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| 38 | exports_file.close()
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| 39 |
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| 40 |
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| 41 | #
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| 42 | # Assembler forwarders
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| 43 | #
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| 44 | asm_file = open(sys.argv[2], "w")
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| 45 | if not asm_file:
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| 46 | print("Error: couldn't open %s file!" % filename)
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| 47 | sys.exit()
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| 48 |
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| 49 | asm_file.write('%include "iprt/asmdefs.mac"\n')
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| 50 | asm_file.write('\n')
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| 51 | asm_file.write(';;;; Enable ICD_LAZY_LOAD to lazy load the ICD DLL (does not work on Win64)\n')
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| 52 | asm_file.write('; %define ICD_LAZY_LOAD 1\n')
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| 53 | asm_file.write('\n')
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| 54 | asm_file.write('%ifdef RT_ARCH_AMD64\n')
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| 55 | asm_file.write('%define PTR_SIZE_PREFIX qword\n')
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| 56 | asm_file.write('%else ; X86\n')
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| 57 | asm_file.write('%define PTR_SIZE_PREFIX dword\n')
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| 58 | asm_file.write('%endif\n')
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| 59 | asm_file.write('\n')
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| 60 | asm_file.write('%ifdef ICD_LAZY_LOAD\n')
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| 61 | asm_file.write('extern NAME(VBoxLoadICD)\n')
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| 62 | asm_file.write('%endif\n')
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| 63 | asm_file.write('extern NAME(g_hmodICD)\n')
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| 64 |
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| 65 | for index in range(len(names)):
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| 66 | fn = names[index]
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| 67 | cbRet = cbArgs[index]
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| 68 | asm_file.write('\n')
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| 69 | asm_file.write('BEGINPROC_EXPORTED %s\n' % fn)
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| 70 | asm_file.write(' extern NAME(pfn_%s)\n' % fn)
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| 71 | asm_file.write('; int3\n')
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| 72 | asm_file.write('%ifdef ICD_LAZY_LOAD\n')
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| 73 | asm_file.write(' mov xAX, PTR_SIZE_PREFIX NAME(g_hmodICD)\n')
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| 74 | asm_file.write(' mov xAX, [xAX]\n')
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| 75 | asm_file.write(' or xAX, xAX\n')
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| 76 | asm_file.write(' jnz l_icd_loaded_%s\n' % fn)
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| 77 | asm_file.write(' call NAME(VBoxLoadICD)\n')
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| 78 | asm_file.write('l_icd_loaded_%s:\n' % fn)
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| 79 | asm_file.write('%endif\n')
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| 80 | asm_file.write(' mov xAX, PTR_SIZE_PREFIX NAME(pfn_%s)\n' % fn)
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| 81 | asm_file.write(' mov xAX, [xAX]\n')
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| 82 | asm_file.write(' or xAX, xAX\n')
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| 83 | asm_file.write(' jnz l_jmp_to_%s\n' % fn)
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| 84 | asm_file.write('%ifdef RT_ARCH_AMD64\n')
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| 85 | asm_file.write(' ret\n')
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| 86 | asm_file.write('%else ; X86\n')
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| 87 | asm_file.write(' ret %s\n' % cbRet)
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| 88 | asm_file.write('%endif\n')
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| 89 | asm_file.write('l_jmp_to_%s:\n' % fn)
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| 90 | asm_file.write(' jmp xAX\n')
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| 91 | asm_file.write('ENDPROC %s\n' % fn)
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| 92 |
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| 93 | asm_file.close()
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| 94 |
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| 95 | GenerateForwarders()
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