117 lines
3.5 KiB
NASM
117 lines
3.5 KiB
NASM
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; If you know macro language of FASM, there is almost nothing to comment here.
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; If you don't know macro language of FASM, comments would not help you.
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filename equ '%EXENAME%'
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SPE_DIR_ORDER fix IMPORT EXPORT BASERELOC EXCEPTION TLS BOUND_IMPORT RESOURCE
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count = 0
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irps dir,SPE_DIR_ORDER
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{
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SPE_DIRECTORY_#dir = count
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count = count + 1
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}
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IMAGE_DIRECTORY_ENTRY_EXPORT = 0
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IMAGE_DIRECTORY_ENTRY_IMPORT = 1
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IMAGE_DIRECTORY_ENTRY_RESOURCE = 2
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IMAGE_DIRECTORY_ENTRY_EXCEPTION = 3
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IMAGE_DIRECTORY_ENTRY_BASERELOC = 5
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IMAGE_DIRECTORY_ENTRY_TLS = 9
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IMAGE_DIRECTORY_ENTRY_BOUND_IMPORT = 11
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virtual at 0
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file filename:3Ch,4
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load pehea dword from 0
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end virtual
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virtual at 0
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file filename:pehea,0F8h
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load NumberOfSections word from 6
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load SizeOfOptionalHeader word from 14h
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if SizeOfOptionalHeader<>0E0h
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error Nonstandard PE header
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end if
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load Characteristics word from 16h
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load AddressOfEntryPoint dword from 28h
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load ImageBase dword from 34h
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load SectionAlignment dword from 38h
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load FileAlignment dword from 3Ch
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load MajorOperatingSystemVersion word from 40h
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load MinorOperatingSystemVersion word from 42h
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load MajorSubsystemVersion word from 48h
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load MinorSubsystemVersion word from 4Ah
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load SizeOfImage dword from 50h
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load SizeOfHeaders dword from 54h
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load Subsystem word from 5Ch
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load SizeOfStackReserve dword from 60h
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load SizeOfHeapReserve dword from 68h
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load SrcNumberOfRvaAndSizes dword from 74h
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DstNumberOfRvaAndSizes = 0
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irps dir,SPE_DIR_ORDER
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{
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if IMAGE_DIRECTORY_ENTRY_#dir < SrcNumberOfRvaAndSizes
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load DirRVA_#dir dword from 78h + 8*IMAGE_DIRECTORY_ENTRY_#dir
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load DirSize_#dir dword from 7Ch + 8*IMAGE_DIRECTORY_ENTRY_#dir
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else
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DirRVA_#dir = 0
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DirSize_#dir = 0
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end if
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if DirRVA_#dir > 0 & DirSize_#dir > 0
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DstNumberOfRvaAndSizes = SPE_DIRECTORY_#dir + 1
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end if
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}
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end virtual
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SectionAlignmentLog = 0
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while SectionAlignment <> 1 shl SectionAlignmentLog
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SectionAlignmentLog = SectionAlignmentLog + 1
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end while
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FileAlignmentLog = 0
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while FileAlignment <> 1 shl FileAlignmentLog
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FileAlignmentLog = FileAlignmentLog + 1
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end while
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; header
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dw 'PE' xor 'S' ; Signature
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dw Characteristics or 0x100 ; IMAGE_FILE_32BIT_MACHINE
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dd AddressOfEntryPoint
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dd ImageBase
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db SectionAlignmentLog
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db FileAlignmentLog
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db MajorSubsystemVersion
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db MinorSubsystemVersion
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dd SizeOfImage
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dd SizeOfStackReserve
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dd SizeOfHeapReserve
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SizeOfHeadersField:
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dd 0
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db Subsystem
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db DstNumberOfRvaAndSizes
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dw NumberOfSections
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; directories
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irps dir,SPE_DIR_ORDER
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{
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if SPE_DIRECTORY_#dir < DstNumberOfRvaAndSizes
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dd DirRVA_#dir, DirSize_#dir
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end if
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}
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NumBytesDeleted = pehea + 0F8h - $ + NumberOfSections*0Ch
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DeltaDeleted = NumBytesDeleted and not (FileAlignment - 1)
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; Use store instead of declaring SizeOfHeaders - DeltaDeleted directly in dd
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; to avoid the second compilation pass.
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store dword SizeOfHeaders - DeltaDeleted at SizeOfHeadersField
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; sections
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repeat NumberOfSections
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file filename:pehea+0F8h+(%-1)*28h,18h
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load a dword from $-4
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store dword a-DeltaDeleted at $-4
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file filename:pehea+0F8h+(%-1)*28h+24h,4
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end repeat
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; padding to keep FileAlignment
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times NumBytesDeleted - DeltaDeleted db 0
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; data
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file filename:pehea+0F8h+NumberOfSections*28h
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