1 2#------------------------------------------------------------------------------ 3# $File: coff,v 1.4 2021/02/10 00:37:02 christos Exp $ 4# coff: file(1) magic for Common Object Files not specific to known cpu types or manufactures 5# 6# COFF 7# 8# by Joerg Jenderek at Oct 2015, Feb 2021 9# https://en.wikipedia.org/wiki/COFF 10# https://de.wikipedia.org/wiki/Common_Object_File_Format 11# http://www.delorie.com/djgpp/doc/coff/filhdr.html 12 13# display name+variables+flags of Common Object Files Format (32bit) 14# Maybe used also in adi,att3b,clipper,hitachi-sh,hp,ibm6000,intel, 15# mips,motorola,msdos,osf1,sharc,varied.out,vax 160 name display-coff 17# test for unused flag bits (0x8000,0x0800,0x0400,0x0200,x0080) in f_flags 18>18 uleshort&0x8E80 0 19# skip DOCTOR.DAILY READER.NDA REDBOX.ROOT by looking for positive number of sections 20>>2 uleshort >0 21# skip ega80woa.fnt svgafix.fnt HP3FNTS1.DAT HP3FNTS2.DAT INTRO.ACT LEARN.PIF by looking for low number of sections 22>>>2 uleshort <4207 23>>>>0 clear x 24# f_magic - magic number 25# DJGPP, 80386 COFF executable, MS Windows COFF Intel 80386 object file (./intel) 26>>>>0 uleshort 0x014C Intel 80386 27# Hitachi SH big-endian COFF (./hitachi-sh) 28>>>>0 uleshort 0x0500 Hitachi SH big-endian 29# Hitachi SH little-endian COFF (./hitachi-sh) 30>>>>0 uleshort 0x0550 Hitachi SH little-endian 31# executable (RISC System/6000 V3.1) or obj module (./ibm6000) 32#>>>>0 uleshort 0x01DF 33# MS Windows COFF Intel Itanium, AMD64 34# https://msdn.microsoft.com/en-us/library/windows/desktop/ms680313(v=vs.85).aspx 35>>>>0 uleshort 0x0200 Intel ia64 36>>>>0 uleshort 0x8664 Intel amd64 37# TODO for other COFFs 38#>>>>0 uleshort 0xABCD COFF_TEMPLATE 39>>>>0 default x 40>>>>>0 uleshort x type 0x%04x 41>>>>0 uleshort x COFF 42# F_EXEC flag bit 43>>>>18 leshort ^0x0002 object file 44!:mime application/x-coff 45!:ext o/obj/lib 46# no cof sample found 47#!:ext cof/o/obj/lib 48>>>>18 leshort &0x0002 executable 49#!:mime application/x-coffexec 50# F_RELFLG flag bit,static object 51>>>>18 leshort &0x0001 \b, no relocation info 52# F_LNNO flag bit 53>>>>18 leshort &0x0004 \b, no line number info 54# F_LSYMS flag bit 55>>>>18 leshort &0x0008 \b, stripped 56>>>>18 leshort ^0x0008 \b, not stripped 57# flags in other COFF versions 58#0x0010 F_FDPR_PROF 59#0x0020 F_FDPR_OPTI 60#0x0040 F_DSA 61# F_AR32WR flag bit 62#>>>>18 leshort &0x0100 \b, 32 bit little endian 63#0x1000 F_DYNLOAD 64#0x2000 F_SHROBJ 65#0x4000 F_LOADONLY 66# f_nscns - number of sections like: 1 2 3 4 5 7 8 9 11 12 15 16 19 20 21 22 26 30 36 40 42 56 80 89 96 124 67>>>>2 uleshort <2 \b, %u section 68>>>>2 uleshort >1 \b, %u sections 69# f_symptr - symbol table pointer, only for not stripped 70# like: 0 0x7c 0xf4 0x104 0x182 0x1c2 0x1c6 0x468 0x948 0x416e 0x149a6 0x1c9d8 0x23a68 0x35120 0x7afa0 71>>>>8 ulelong >0 \b, symbol offset=0x%x 72# f_nsyms - number of symbols, only for not stripped 73# like: 0 2 7 9 10 11 20 35 41 63 71 80 105 146 153 158 170 208 294 572 831 1546 74>>>>12 ulelong >0 \b, %d symbols 75# f_opthdr - optional header size. An object file should have a value of 0 76>>>>16 uleshort >0 \b, optional header size %u 77# f_timdat - file time & date stamp only for little endian 78>>>>4 ledate >0 \b, created %s 79# at offset 20 can be optional header, extra bytes FILHSZ-20 because 80# do not rely on sizeof(FILHDR) to give the correct size for header. 81# or first section header 82# additional variables for other COFF files 83>>>>16 uleshort =0 84# first section name s_name[8] like: .text .data .debug$S .drectve .testseg 85>>>>>20 string x \b, 1st section name "%.8s" 86# >20 beshort 0407 (impure) 87# >20 beshort 0410 (pure) 88# >20 beshort 0413 (demand paged) 89# >20 beshort 0421 (standalone) 90# >22 leshort >0 - version %d 91# >168 string .lowmem Apple toolbox 92 93