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- #------------------------------------------------------------------------------
- # $File: xenix,v 1.15 2022/10/19 20:15:16 christos Exp $
- # xenix: file(1) magic for Microsoft Xenix
- #
- # "Middle model" stuff, and "Xenix 8086 relocatable or 80286 small
- # model" lifted from "magic.xenix", with comment "derived empirically;
- # treat as folklore until proven"
- #
- # "small model", "large model", "huge model" stuff lifted from XXX
- #
- # XXX - "x.out" collides with PDP-11 archives
- #
- 0 string core core file (Xenix)
- # URL: http://www.polarhome.com/service/man/?qf=86rel&tf=2&of=Xenix
- # http://fileformats.archiveteam.org/wiki/OMF
- # Reference: http://www.azillionmonkeys.com/qed/Omfg.pdf
- # Update: Joerg Jenderek
- # recordtype~TranslatorHEADerRecord
- 0 byte 0x80
- # GRR: line above is too general as it catches also Extensible storage engine DataBase,
- # all lif files like forth.lif hpcc88.lif lex90b.lif ( See ./lif)
- # and all compressed DEGAS low-res bitmaps like: MUNCHIE.PC1 PIDER1.PC1
- # skip examples like GENA.SND Switch.Snd by looking for record length maximal 1024-3
- >1 uleshort <1022
- # skip examples like GAME.PICTURE Strange.Pic by looking for positive record length
- >>1 uleshort >0
- # skip examples like Xtable.Data FRACTAL.GEN SHR.VIEW by looking for positive string length
- >>>3 ubyte >0
- # skip examples like OMBRE.6 with "UUUUUU" name by looking for valid high second record type
- >>>>(1.s+3) ubyte >0x6D
- # skip few Atari DEGAS bitmap TPDEMO.PC2 RECIPE.PC2 with invalid "high" second record type FEh FFh
- >>>>>(1.s+3) ubyte <0xF2 8086 relocatable (Microsoft)
- #!:mime application/octet-stream
- !:mime application/x-object
- !:ext obj/o/a
- # T-module name often source name like "hello.c" or "jmppm32.asm" in JMPPM32.OBJ or
- # "kbhit" in KBHITS.OBJ or "CAUSEWAY_KERNAL" in CWAPI.OBJ
- >>>>>>3 pstring x \b, "%s"
- # data length probably lower 256 according to TrID obj_omf.trid.xml
- >>>>>>1 uleshort x \b, 1st record data length %u
- # checksum
- #>>>>>>(3.b+4) ubyte x \b, checksum %#2.2x
- # second recordtype: 96h~LNAMES 88h~COMENT 8CH~EXTDEF
- # highest F1h~Library End Record
- >>>>>>(1.s+3) ubyte x \b, 2nd record type %#x
- >>>>>>(1.s+4) uleshort x \b, 2nd record data length %u
- 0 leshort 0xff65 x.out
- >2 string __.SYMDEF randomized
- >0 byte x archive
- 0 leshort 0x206 Microsoft a.out
- >8 leshort 1 Middle model
- >0x1e leshort &0x10 overlay
- >0x1e leshort &0x2 separate
- >0x1e leshort &0x4 pure
- >0x1e leshort &0x800 segmented
- >0x1e leshort &0x400 standalone
- >0x1e leshort &0x8 fixed-stack
- >0x1c byte &0x80 byte-swapped
- >0x1c byte &0x40 word-swapped
- >0x10 lelong >0 not-stripped
- >0x1e leshort ^0xc000 pre-SysV
- >0x1e leshort &0x4000 V2.3
- >0x1e leshort &0x8000 V3.0
- >0x1c byte &0x4 86
- >0x1c byte &0xb 186
- >0x1c byte &0x9 286
- >0x1c byte &0xa 386
- >0x1f byte <0x040 small model
- >0x1f byte =0x048 large model
- >0x1f byte =0x049 huge model
- >0x1e leshort &0x1 executable
- >0x1e leshort ^0x1 object file
- >0x1e leshort &0x40 Large Text
- >0x1e leshort &0x20 Large Data
- >0x1e leshort &0x120 Huge Objects Enabled
- >0x10 lelong >0 not stripped
- 0 leshort 0x140 old Microsoft 8086 x.out
- >0x3 byte &0x4 separate
- >0x3 byte &0x2 pure
- >0 byte &0x1 executable
- >0 byte ^0x1 relocatable
- >0x14 lelong >0 not stripped
- 0 lelong 0x206 b.out
- >0x1e leshort &0x10 overlay
- >0x1e leshort &0x2 separate
- >0x1e leshort &0x4 pure
- >0x1e leshort &0x800 segmented
- >0x1e leshort &0x400 standalone
- >0x1e leshort &0x1 executable
- >0x1e leshort ^0x1 object file
- >0x1e leshort &0x4000 V2.3
- >0x1e leshort &0x8000 V3.0
- >0x1c byte &0x4 86
- >0x1c byte &0xb 186
- >0x1c byte &0x9 286
- >0x1c byte &0x29 286
- >0x1c byte &0xa 386
- >0x1e leshort &0x4 Large Text
- >0x1e leshort &0x2 Large Data
- >0x1e leshort &0x102 Huge Objects Enabled
- 0 leshort 0x580 XENIX 8086 relocatable or 80286 small model
- # GRR: line above is too general as it catches also all 8086 relocatable (Microsoft) with 1st record data length 5 C0M.OBJ C0T.OBJ C0S.OBJ
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