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Text File | 1998-08-17 | 37.7 KB | 737 lines | [TEXT/MPS ]

; ; File: PEFBinaryFormat.a ; ; Contains: PEF Types and Macros ; ; Version: Technology: Master Interfaces ; Release: Universal Interfaces 3.2 ; ; Copyright: © 1993-1998, 1998 by Apple Computer, Inc., all rights reserved. ; ; Bugs?: For bug reports, consult the following page on ; the World Wide Web: ; ; http://developer.apple.com/bugreporter/ ; ; IF &TYPE('__PEFBINARYFORMAT__') = 'UNDEFINED' THEN __PEFBINARYFORMAT__ SET 1 IF &TYPE('__MACTYPES__') = 'UNDEFINED' THEN include 'MacTypes.a' ENDIF ; -------------------------------------------------------------------------------------------- ; Almost all types are padded for natural alignment. However the PEFExportedSymbol type is ; 10 bytes long, containing two 32 bit fields and one 16 bit field. Arrays of it must be ; packed, so it requires "68K" alignment. Setting this globally to 68K should also help ; ensure consistent treatment across compilers. ; ======================================================================================== ; Overall Structure ; ================= ; -------------------------------------------------------------------------------------------- ; This header contains a complete set of types and macros for dealing with the PEF executable ; format. While some description is provided, this header is not meant as a primary source ; of documentation on PEF. An excellent specification of PEF can be found in the Macintosh ; Runtime Architectures book. This header is primarily a physical format description. Thus ; it depends on as few other headers as possible and structure fields have obvious sizes. ; ; The physical storage for a PEF executable is known as a "container". This refers to just ; the executable itself, not the file etc. E.g. if five DLLs are packaged in a single file's ; data fork, that one data fork has five containers within it. ; ; A PEF container consists of an overall header, followed by one or more section headers, ; followed by the section name table, followed by the contents for the sections. Some kinds ; of sections have specific internal representation. The "loader" section is the most common ; of these special sections. It contains information on the exports, imports, and runtime ; relocations required to prepare the executable. PEF containers are self contained, all ; portions are located via relative offsets. ; ; ; +-------------------------------+ ; | Container Header | 40 bytes ; +-------------------------------+ ; | Section 0 header | 28 bytes each ; |...............................| ; | - - - - | ; |...............................| ; | Section n-1 header | ; +-------------------------------+ ; | Section Name Table | ; +-------------------------------+ ; | Section x raw data | ; +-------------------------------+ ; | - - - - | ; +-------------------------------+ ; | Section y raw data | ; +-------------------------------+ ; ; ; The sections are implicitly numbered from 0 to n according to the order of their headers. ; The headers of the instantiated sections must precede those of the non-instantiated ; sections. The ordering of the raw data is independent of the section header ordering. ; Each section header contains the offset for that section's raw data. ; =========================================================================================== ; Container Header ; ================ PEFContainerHeader RECORD 0 tag1 ds.l 1 ; offset: $0 (0) ; Must contain 'Joy!'. tag2 ds.l 1 ; offset: $4 (4) ; Must contain 'peff'. (Yes, with two 'f's.) architecture ds.l 1 ; offset: $8 (8) ; The ISA for code sections. Constants in CodeFragments.h. formatVersion ds.l 1 ; offset: $C (12) ; The physical format version. dateTimeStamp ds.l 1 ; offset: $10 (16) ; Macintosh format creation/modification stamp. oldDefVersion ds.l 1 ; offset: $14 (20) ; Old definition version number for the code fragment. oldImpVersion ds.l 1 ; offset: $18 (24) ; Old implementation version number for the code fragment. currentVersion ds.l 1 ; offset: $1C (28) ; Current version number for the code fragment. sectionCount ds.w 1 ; offset: $20 (32) ; Total number of section headers that follow. instSectionCount ds.w 1 ; offset: $22 (34) ; Number of instantiated sections. reservedA ds.l 1 ; offset: $24 (36) ; Reserved, must be written as zero. sizeof EQU * ; size: $28 (40) ENDR kPEFTag1 EQU 'Joy!' ; For non-Apple compilers: 0x4A6F7921. kPEFTag2 EQU 'peff' ; For non-Apple compilers: 0x70656666. kPEFVersion EQU $00000001 kPEFFirstSectionHeaderOffset EQU 40 ; =========================================================================================== ; Section Headers ; =============== PEFSectionHeader RECORD 0 nameOffset ds.l 1 ; offset: $0 (0) ; Offset of name within the section name table, -1 => none. defaultAddress ds.l 1 ; offset: $4 (4) ; Default address, affects relocations. totalLength ds.l 1 ; offset: $8 (8) ; Fully expanded size in bytes of the section contents. unpackedLength ds.l 1 ; offset: $C (12) ; Size in bytes of the "initialized" part of the contents. containerLength ds.l 1 ; offset: $10 (16) ; Size in bytes of the raw data in the container. containerOffset ds.l 1 ; offset: $14 (20) ; Offset of section's raw data. sectionKind ds.b 1 ; offset: $18 (24) ; Kind of section contents/usage. shareKind ds.b 1 ; offset: $19 (25) ; Sharing level, if a writeable section. alignment ds.b 1 ; offset: $1A (26) ; Preferred alignment, expressed as log 2. reservedA ds.b 1 ; offset: $1B (27) ; Reserved, must be zero. sizeof EQU * ; size: $1C (28) ENDR ; Values for the sectionKind field. ; Section kind values for instantiated sections. kPEFCodeSection EQU 0 ; Code, presumed pure & position independent. kPEFUnpackedDataSection EQU 1 ; Unpacked writeable data. kPEFPackedDataSection EQU 2 ; Packed writeable data. kPEFConstantSection EQU 3 ; Read-only data. kPEFExecDataSection EQU 6 ; Intermixed code and writeable data. ; Section kind values for non-instantiated sections. kPEFLoaderSection EQU 4 ; Loader tables. kPEFDebugSection EQU 5 ; Reserved for future use. kPEFExceptionSection EQU 7 ; Reserved for future use. kPEFTracebackSection EQU 8 ; Reserved for future use. ; Values for the shareKind field. kPEFProcessShare EQU 1 ; Shared within a single process. kPEFGlobalShare EQU 4 ; Shared across the entire system. kPEFProtectedShare EQU 5 ; Readable across the entire system, writeable only to privileged code. ; =========================================================================================== ; Packed Data Contents ; ==================== ; -------------------------------------------------------------------------------------------- ; The raw contents of a packed data section are a sequence of byte codes. The basic format ; has a 3 bit opcode followed by a 5 bit count. Additional bytes might be used to contain ; counts larger than 31, and to contain a second or third count. Further additional bytes ; contain actual data values to transfer. ; ; All counts are represented in a variable length manner. A zero in the initial 5 bit count ; indicates the actual value follows. In this case, and for the second and third counts, the ; count is represented as a variable length sequence of bytes. The bytes are stored in big ; endian manner, most significant part first. The high order bit is set in all but the last ; byte. The value is accumulated by shifting the current value up 7 bits and adding in the ; low order 7 bits of the next byte. ; The packed data opcodes. kPEFPkDataZero EQU 0 ; Zero fill "count" bytes. kPEFPkDataBlock EQU 1 ; Block copy "count" bytes. kPEFPkDataRepeat EQU 2 ; Repeat "count" bytes "count2"+1 times. kPEFPkDataRepeatBlock EQU 3 ; Interleaved repeated and unique data. kPEFPkDataRepeatZero EQU 4 ; Interleaved zero and unique data. kPEFPkDataOpcodeShift EQU 5 kPEFPkDataCount5Mask EQU $1F kPEFPkDataMaxCount5 EQU 31 kPEFPkDataVCountShift EQU 7 kPEFPkDataVCountMask EQU $7F kPEFPkDataVCountEndMask EQU $80 ; -------------------------------------------------------------------------------------------- ; The following code snippet can be used to input a variable length count. ; ; count = 0; ; do { ; byte = *bytePtr++; ; count = (count << kPEFPkDataVCountShift) | (byte & kPEFPkDataVCountMask); ; } while ( (byte & kPEFPkDataVCountEndMask) != 0 ); ; ; The following code snippet can be used to output a variable length count to a byte array. ; This is more complex than the input code because the chunks are output in big endian order. ; Think about handling values like 0 or 0x030000. ; ; count = 1;. ; tempValue = value >> kPEFPkDataCountShift; ; while ( tempValue != 0 ) { ; count += 1; ; tempValue = tempValue >> kPEFPkDataCountShift; ; } ; ; bytePtr += count; ; tempPtr = bytePtr - 1; ; *tempPtr-- = value; // ! No need to mask, only the low order byte is stored. ; for ( count -= 1; count != 0; count -= 1 ) { ; value = value >> kPEFPkDataCountShift; ; *tempPtr-- = value | kPEFPkDataCountEndMask; ; } ; =========================================================================================== ; Loader Section ; ============== ; -------------------------------------------------------------------------------------------- ; The loader section contains information needed to prepare the code fragment for execution. ; This includes this fragment's exports, the import libraries and the imported symbols from ; each library, and the relocations for the writeable sections. ; ; +-----------------------------------+ <-- containerOffset --------+ ; | Loader Info Header | 56 bytes | ; |-----------------------------------| | ; | Imported Library 0 | 24 bytes each | ; |...................................| | ; | - - - | | ; |...................................| | ; | Imported Library l-1 | | ; |-----------------------------------| | ; | Imported Symbol 0 | 4 bytes each | ; |...................................| | ; | - - - | | ; |...................................| | ; | Imported Symbol i-1 | | ; |-----------------------------------| | ; | Relocation Header 0 | 12 bytes each | ; |...................................| | ; | - - - | | ; |...................................| | ; | Relocation Header r-1 | | ; |-----------------------------------| <-- + relocInstrOffset -----| ; | Relocation Instructions | | ; |-----------------------------------| <-- + loaderStringsOffset --| ; | Loader String Table | | ; |-----------------------------------| <-- + exportHashOffset -----+ ; | Export Hash Slot 0 | 4 bytes each ; |...................................| ; | - - - | ; |...................................| ; | Export Hash Slot h-1 | ; |-----------------------------------| ; | Export Symbol Key 0 | 4 bytes each ; |...................................| ; | - - - | ; |...................................| ; | Export Symbol Key e-1 | ; |-----------------------------------| ; | Export Symbol 0 | 10 bytes each ; |...................................| ; | - - - | ; |...................................| ; | Export Symbol e-1 | ; +-----------------------------------+ PEFLoaderInfoHeader RECORD 0 mainSection ds.l 1 ; offset: $0 (0) ; Section containing the main symbol, -1 => none. mainOffset ds.l 1 ; offset: $4 (4) ; Offset of main symbol. initSection ds.l 1 ; offset: $8 (8) ; Section containing the init routine's TVector, -1 => none. initOffset ds.l 1 ; offset: $C (12) ; Offset of the init routine's TVector. termSection ds.l 1 ; offset: $10 (16) ; Section containing the term routine's TVector, -1 => none. termOffset ds.l 1 ; offset: $14 (20) ; Offset of the term routine's TVector. importedLibraryCount ds.l 1 ; offset: $18 (24) ; Number of imported libraries. ('l') totalImportedSymbolCount ds.l 1 ; offset: $1C (28) ; Total number of imported symbols. ('i') relocSectionCount ds.l 1 ; offset: $20 (32) ; Number of sections with relocations. ('r') relocInstrOffset ds.l 1 ; offset: $24 (36) ; Offset of the relocation instructions. loaderStringsOffset ds.l 1 ; offset: $28 (40) ; Offset of the loader string table. exportHashOffset ds.l 1 ; offset: $2C (44) ; Offset of the export hash table. exportHashTablePower ds.l 1 ; offset: $30 (48) ; Export hash table size as log 2. (Log2('h')) exportedSymbolCount ds.l 1 ; offset: $34 (52) ; Number of exported symbols. ('e') sizeof EQU * ; size: $38 (56) ENDR ; =========================================================================================== ; Imported Libraries ; ------------------ PEFImportedLibrary RECORD 0 nameOffset ds.l 1 ; offset: $0 (0) ; Loader string table offset of library's name. oldImpVersion ds.l 1 ; offset: $4 (4) ; Oldest compatible implementation version. currentVersion ds.l 1 ; offset: $8 (8) ; Current version at build time. importedSymbolCount ds.l 1 ; offset: $C (12) ; Imported symbol count for this library. firstImportedSymbol ds.l 1 ; offset: $10 (16) ; Index of first imported symbol from this library. options ds.b 1 ; offset: $14 (20) ; Option bits for this library. reservedA ds.b 1 ; offset: $15 (21) ; Reserved, must be zero. reservedB ds.w 1 ; offset: $16 (22) ; Reserved, must be zero. sizeof EQU * ; size: $18 (24) ENDR ; Bits for the PEFImportedLibrary options field. kPEFWeakImportLibMask EQU $40 ; The imported library is allowed to be missing. kPEFInitLibBeforeMask EQU $80 ; The imported library must be initialized first. ; =========================================================================================== ; Imported Symbols ; ---------------- ; -------------------------------------------------------------------------------------------- ; The PEFImportedSymbol type has the following bit field layout. ; ; 3 ; 0 7 8 1 ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ; | symbol class | offset of symbol name in loader string table | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ; |<-- 8 bits --->|<-- 24 bits ---------------------------------->| PEFImportedSymbol RECORD 0 classAndName ds.l 1 ; offset: $0 (0) sizeof EQU * ; size: $4 (4) ENDR kPEFImpSymClassShift EQU 24 kPEFImpSymNameOffsetMask EQU $00FFFFFF kPEFImpSymMaxNameOffset EQU $00FFFFFF ; 16,777,215 ; Imported and exported symbol classes. kPEFCodeSymbol EQU $00 kPEFDataSymbol EQU $01 kPEFTVectorSymbol EQU $02 kPEFTOCSymbol EQU $03 kPEFGlueSymbol EQU $04 kPEFUndefinedSymbol EQU $0F kPEFWeakImportSymMask EQU $80 ; =========================================================================================== ; Exported Symbol Hash Table ; -------------------------- ; -------------------------------------------------------------------------------------------- ; Exported symbols are described in four parts, optimized for speed of lookup. These parts ; are the "export hash table", the "export key table", the "export symbol table", and the ; "export name table". Overall they contain a flattened representation of a fairly normal ; hashed symbol table. ; ; The export hash table is an array of small fixed size elements. The number of elements is ; a power of 2. A 32 bit hash word for a symbol is converted into an index into this array. ; Each hash slot contains a count of the number of exported symbols that map to this slot and ; the index of the first of those symbols in the key and symbol tables. Of course some hash ; slots will have a zero count. ; ; The key and symbol tables are also arrays of fixed size elements, one for each exported ; symbol. Their entries are grouped by hash slot, those elements mapping to the same hash ; slot are contiguous. The key table contains just the full 32 bit hash word for each ; exported symbol. The symbol table contains the offset of the symbol's name in the string ; table and other information about the exported symbol. ; ; To look up an export you take the hashword and compute the hash slot index. You then scan ; the indicated portion of the key table for matching hashwords. If a hashword matches, you ; look at the corresponding symbol table entry to find the full symbol name. If the names ; match the symbol is found. ; -------------------------------------------------------------------------------------------- ; The following function may be used to compute the hash table size. Signed values are used ; just to avoid potential code generation overhead for unsigned division. ; ; UInt8 PEFComputeHashTableExponent ( SInt32 exportCount ) ; { ; SInt32 exponent; ; ; const SInt32 kExponentLimit = 16; // Arbitrary, but must not exceed 30. ; const SInt32 kAverageChainLimit = 10; // Arbitrary, for space/time tradeoff. ; ; for ( exponent = 0; exponent < kExponentLimit; exponent += 1 ) { ; if ( (exportCount / (1 << exponent)) < kAverageChainLimit ) break; ; } ; ; return exponent; ; ; } // PEFComputeHashTableExponent () ; -------------------------------------------------------------------------------------------- ; The PEFExportedSymbolHashSlot type has the following bit field layout. ; ; 1 1 3 ; 0 3 4 1 ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ; | symbol count | index of first export key | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ; |<-- 14 bits -------------->|<-- 18 bits ---------------------->| PEFExportedSymbolHashSlot RECORD 0 countAndStart ds.l 1 ; offset: $0 (0) sizeof EQU * ; size: $4 (4) ENDR kPEFHashSlotSymCountShift EQU 18 kPEFHashSlotFirstKeyMask EQU $0003FFFF kPEFHashSlotMaxSymbolCount EQU $00003FFF ; 16,383 kPEFHashSlotMaxKeyIndex EQU $0003FFFF ; 262,143 ; =========================================================================================== ; Exported Symbol Hash Key ; ------------------------ PEFSplitHashWord RECORD 0 nameLength ds.w 1 ; offset: $0 (0) hashValue ds.w 1 ; offset: $2 (2) sizeof EQU * ; size: $4 (4) ENDR PEFExportedSymbolKey RECORD 0 fullHashWord ds.l 1 ; offset: $0 (0) ORG 0 splitHashWord ds PEFSplitHashWord ; offset: $0 (0) sizeof EQU * ; size: $4 (4) ENDR kPEFHashLengthShift EQU 16 kPEFHashValueMask EQU $0000FFFF kPEFHashMaxLength EQU $0000FFFF ; 65,535 ; ---------------------------------------------------------------------------------------------------- ; The following function computes the full 32 bit hash word. ; ; UInt32 PEFComputeHashWord ( BytePtr nameText, // ! First "letter", not length byte. ; UInt32 nameLength ) // ! The text may be zero terminated. ; { ; BytePtr charPtr = nameText; ; SInt32 hashValue = 0; // ! Signed to match old published algorithm. ; UInt32 length = 0; ; UInt32 limit; ; UInt32 result; ; UInt8 currChar; ; ; #define PseudoRotate(x) ( ( (x) << 1 ) - ( (x) >> 16 ) ) ; ; for ( limit = nameLength; limit > 0; limit -= 1 ) { ; currChar = *charPtr++; ; if ( currChar == NULL ) break; ; length += 1; ; hashValue = PseudoRotate ( hashValue ) ^ currChar; ; } ; ; result = (length << kPEFHashLengthShift) | ; ((UInt16) ((hashValue ^ (hashValue >> 16)) & kPEFHashValueMask)); ; ; return result; ; ; } // PEFComputeHashWord () ; =========================================================================================== ; Exported Symbols ; ---------------- PEFExportedSymbol RECORD 0 ; ! This structure is 10 bytes long and arrays are packed. classAndName ds.l 1 ; offset: $0 (0) ; A combination of class and name offset. symbolValue ds.l 1 ; offset: $4 (4) ; Typically the symbol's offset within a section. sectionIndex ds.w 1 ; offset: $8 (8) ; The index of the section, or pseudo-section, for the symbol. sizeof EQU * ; size: $A (10) ENDR ; -------------------------------------------------------------------------------------------- ; The classAndName field of the PEFExportedSymbol type has the following bit field layout. ; ; 3 ; 0 7 8 1 ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ; | symbol class | offset of symbol name in loader string table | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ; |<-- 8 bits --->|<-- 24 bits ---------------------------------->| kPEFExpSymClassShift EQU 24 kPEFExpSymNameOffsetMask EQU $00FFFFFF kPEFExpSymMaxNameOffset EQU $00FFFFFF ; 16,777,215 ; Negative section indices indicate pseudo-sections. kPEFAbsoluteExport EQU -2 ; The symbol value is an absolute address. kPEFReexportedImport EQU -3 ; The symbol value is the index of a reexported import. ; =========================================================================================== ; Loader Relocations ; ================== ; -------------------------------------------------------------------------------------------- ; The relocations for a section are defined by a sequence of instructions for an abstract ; machine that is specifically geared to performing relocations commonly needed for the "CFM" ; code generation model. These instructions occur in 16 bit chunks. Most instructions have ; just a single chunk. Instructions that are larger than 16 bits have an opcode and some of ; the operands in the first chunk, with other operands in following chunks. ; ; ! Note that the multi-chunk relocations have separate "Compose" macros for each chunk. The ; ! macros have the same basic name with a positional suffix of "_1st", "_2nd", etc. ; typedef UInt16 PEFRelocChunk PEFLoaderRelocationHeader RECORD 0 sectionIndex ds.w 1 ; offset: $0 (0) ; Index of the section to be fixed up. reservedA ds.w 1 ; offset: $2 (2) ; Reserved, must be zero. relocCount ds.l 1 ; offset: $4 (4) ; Number of 16 bit relocation chunks. firstRelocOffset ds.l 1 ; offset: $8 (8) ; Offset of first relocation instruction. sizeof EQU * ; size: $C (12) ENDR ; -------------------------------------------------------------------------------------------- ; ! Note that the relocCount field is the number of 16 bit relocation chunks, i.e. 1/2 the ; ! total number of bytes of relocation instructions. While most relocation instructions are ; ! 16 bits long, some are longer so the number of complete relocation instructions may be ; ! less than the relocCount value. ; ------------------------------------------------------------------------------------ ; The PEFRelocField macro is a utility for extracting relocation instruction fields. ; =========================================================================================== ; Basic Relocation Opcodes ; ------------------------ ; -------------------------------------------------------------------------------------------- ; The number of opcode bits varies from 2 to 7. The enumeration and switch table given here ; are defined in terms of the most significant 7 bits of the first instruction chunk. An ; instruction is decoded by using the most significant 7 bits as an index into the opcode ; table, which in turn contains appropriately masked forms of the most significant 7 bits. ; The macro PEFRelocBasicOpcode assumes a declaration of the form. ; ; UInt8 kPEFRelocBasicOpcodes [kPEFRelocBasicOpcodeRange] = { PEFMaskedBasicOpcodes }; kPEFRelocBasicOpcodeRange EQU 128 ; -------------------------------------------------------------------------------------------- ; The relocation opcodes, clustered by major and minor groups. The instructions within a ; cluster all have the same bit field layout. The enumeration values use the high order 7 ; bits of the relocation instruction. Unused low order bits are set to zero. kPEFRelocBySectDWithSkip EQU $00 ; Binary: 00x_xxxx kPEFRelocBySectC EQU $20 ; Binary: 010_0000, group is "RelocRun" kPEFRelocBySectD EQU $21 ; Binary: 010_0001 kPEFRelocTVector12 EQU $22 ; Binary: 010_0010 kPEFRelocTVector8 EQU $23 ; Binary: 010_0011 kPEFRelocVTable8 EQU $24 ; Binary: 010_0100 kPEFRelocImportRun EQU $25 ; Binary: 010_0101 kPEFRelocSmByImport EQU $30 ; Binary: 011_0000, group is "RelocSmIndex" kPEFRelocSmSetSectC EQU $31 ; Binary: 011_0001 kPEFRelocSmSetSectD EQU $32 ; Binary: 011_0010 kPEFRelocSmBySection EQU $33 ; Binary: 011_0011 kPEFRelocIncrPosition EQU $40 ; Binary: 100_0xxx kPEFRelocSmRepeat EQU $48 ; Binary: 100_1xxx kPEFRelocSetPosition EQU $50 ; Binary: 101_000x kPEFRelocLgByImport EQU $52 ; Binary: 101_001x kPEFRelocLgRepeat EQU $58 ; Binary: 101_100x kPEFRelocLgSetOrBySection EQU $5A ; Binary: 101_101x kPEFRelocUndefinedOpcode EQU $FF ; Used in masking table for all undefined values. ; ---------------------------------------------------------------------------- ; The RelocLgSetOrBySection instruction has an additional 4 bits of subopcode ; beyond the 7 used by the dispatch table. To be precise it has 6 plus 4 but ; the dispatch table ignores the 7th bit, so the subdispatch is on all 4 extra ; subopcode bits. kPEFRelocLgBySectionSubopcode EQU $00 ; Binary: 0000 kPEFRelocLgSetSectCSubopcode EQU $01 ; Binary: 0001 kPEFRelocLgSetSectDSubopcode EQU $02 ; Binary: 0010 ; -------------------------------------------------------------------------------------------- ; The initial values for the opcode "masking" table. This has the enumeration values from ; above with appropriate replications for "don't care" bits. It is almost certainly shorter ; and faster to look up the masked value in a table than to use a branch tree. ; =========================================================================================== ; RelocBySectDWithSkip Instruction ; -------------------------------- ; -------------------------------------------------------------------------------------------- ; The "RelocBySectDWithSkip" instruction has the following bit field layout. ; ; 1 1 ; 0 1 2 9 0 5 ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ; |0 0| skip count | rel count | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ; | 2 |<-- 8 bits --->|<-- 6 --->| ; ; ! Note that the stored skip count and reloc count are the actual values! kPEFRelocWithSkipMaxSkipCount EQU 255 kPEFRelocWithSkipMaxRelocCount EQU 63 ; =========================================================================================== ; RelocRun Group ; -------------- ; -------------------------------------------------------------------------------------------- ; The "RelocRun" group includes the "RelocBySectC", "RelocBySectD", "RelocTVector12", ; "RelocTVector8", "RelocVTable8", and "RelocImportRun" instructions. This group has the ; following bit field layout. ; ; 1 ; 0 2 3 6 7 5 ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ; |0 1 0| subop.| run length | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ; | 3 |<- 4 ->|<-- 9 bits ----->| ; ; ! Note that the stored run length is the actual value minus 1, but the macros deal with the ; ! actual value! kPEFRelocRunMaxRunLength EQU 512 ; =========================================================================================== ; RelocSmIndex Group ; ------------------ ; ---------------------------------------------------------------------------------------- ; The "RelocSmIndex" group includes the "RelocSmByImport", "RelocSmSetSectC", ; "RelocSmSetSectD" and "RelocSmBySection" instructions. This group has the following bit ; field layout. ; ; 1 ; 0 2 3 6 7 5 ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ; |0 1 1| subop.| index | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ; | 3 |<- 4 ->|<-- 9 bits ----->| ; ; ! Note that the stored index is the actual value! kPEFRelocSmIndexMaxIndex EQU 511 ; =========================================================================================== ; RelocIncrPosition Instruction ; ----------------------------- ; -------------------------------------------------------------------------------------------- ; The "RelocIncrPosition" instruction has the following bit field layout. ; ; 1 ; 0 3 4 5 ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ; |1 0 0 0| offset | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ; |<- 4 ->|<-- 12 bits ---------->| ; ; ! Note that the stored offset is the actual value minus 1, but the macros deal with the ; ! actual value! kPEFRelocIncrPositionMaxOffset EQU 4096 ; =========================================================================================== ; RelocSmRepeat Instruction ; ------------------------- ; -------------------------------------------------------------------------------------------- ; The "RelocSmRepeat" instruction has the following bit field layout. ; ; 1 ; 0 3 4 7 8 5 ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ; |1 0 0 1| chnks | repeat count | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ; |<- 4 ->|<- 4 ->|<-- 8 bits --->| ; ; ! Note that the stored chunk count and repeat count are the actual values minus 1, but the ; ! macros deal with the actual values! kPEFRelocSmRepeatMaxChunkCount EQU 16 kPEFRelocSmRepeatMaxRepeatCount EQU 256 ; =========================================================================================== ; RelocSetPosition Instruction ; ---------------------------- ; -------------------------------------------------------------------------------------------- ; The "RelocSetPosition" instruction has the following bit field layout. ; ; 1 1 ; 0 5 6 5 0 5 ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ; |1 0 1 0 0 0| offset (high) | | offset (low) | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ; |<-- 6 ---->|<-- 10 bits ------>| |<-- 16 bits ------------------>| ; ; ! Note that the stored offset is the actual value! kPEFRelocSetPosMaxOffset EQU $03FFFFFF ; 67,108,863 ; =========================================================================================== ; RelocLgByImport Instruction ; --------------------------- ; -------------------------------------------------------------------------------------------- ; The "RelocLgByImport" instruction has the following bit field layout. ; ; 1 1 ; 0 5 6 5 0 5 ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ; |1 0 1 0 0 1| index (high) | | index (low) | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ; |<-- 6 ---->|<-- 10 bits ------>| |<-- 16 bits ------------------>| ; ; ! Note that the stored offset is the actual value! kPEFRelocLgByImportMaxIndex EQU $03FFFFFF ; 67,108,863 ; =========================================================================================== ; RelocLgRepeat Instruction ; ------------------------- ; -------------------------------------------------------------------------------------------- ; The "RelocLgRepeat" instruction has the following bit field layout. ; ; 1 1 1 ; 0 5 6 9 0 5 0 5 ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ; |1 0 1 1 0 0| chnks | rpt (high)| | repeat count (low) | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ; |<-- 6 --->|<- 4 ->|<-- 6 --->| |<-- 16 bits ------------------>| ; ; ! Note that the stored chunk count is the actual value minus 1, but the macros deal with ; ! the actual value! The stored repeat count is the actual value! kPEFRelocLgRepeatMaxChunkCount EQU 16 kPEFRelocLgRepeatMaxRepeatCount EQU $003FFFFF ; 4,194,303 ; =========================================================================================== ; RelocLgSetOrBySection Group ; --------------------------- ; -------------------------------------------------------------------------------------------- ; The "RelocLgSetOrBySection" instruction is really a group including the "RelocLgBySection", ; "RelocLgSetSectC" and "RelocLgSetSectD" instructions. This group has the following bit ; field layout. ; ; 1 1 1 ; 0 5 6 9 0 5 0 5 ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ; |1 0 1 1 0 1| subop | idx (high)| | index (low) | ; +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ; |<-- 6 --->|<- 4 ->|<-- 6 --->| |<-- 16 bits ------------------>| ; ; ! Note that the stored index is the actual value! kPEFRelocLgSetOrBySectionMaxIndex EQU $003FFFFF ; 4,194,303 ENDIF ; __PEFBINARYFORMAT__