; $Id: mini.asm,v 1.1.2.12 2001-08-20 18:47:53 bird Exp $ ; ; Having great fun making small executables... ; ; Copyright (c) 2001 knut st. osmundsen (kosmunds@csc.com) ; ; Project Odin Software License can be found in LICENSE.TXT ; ifdef NORMAL ; ; ; ; ; High-octane stock. ; ; Build this in the Odin32 VAC3 environment to get a 273 bytes result. ; Exehdr, alp and ilink is required. ; nmake -f mini.mak NORMAL=1 -a ; ; Build this in the Odin32 Watcom environment to get a 274 bytes result. ; Exehdr, alp and wlink is required. ; nmake -f mini.mak NORMAL=1 -a ; ; .386 ; config CLIB EQU 1 ifdef CLIB extrn vprintf:PROC ; optlink, 2+ parameters. second NULL. else extrn DosPutMessage:PROC ; system, tree parameters. endif CODE32 segment byte stack use32 'STACK' public minilx ; ; Data ; ImReallySmall db "I'm really small!",0ah ifdef CLIB terminator db 0 endif ; ; Code ; minilx: ifdef CLIB ; method 1 - 4 bytes ;inc eax ;shl eax,16 ; method 2 - 4 bytes ;bts eax, 16 ; method 3 - 4 bytes ;inc ah ;mul eax ; method 4 - 3 bytes YEAH!!! dec ax inc eax jmp vprintf else push offset ImReallySmall push 18 push eax call DosPutMessage add esp, 12 ret endif db 1000h-$ dup(?) CODE32 ends END minilx endif ifndef NORMAL ; ; ; ; Tiny edition - Custom category - everything but the code is hardcoded! ; ; Build it in an Odin32 VACxx/Watcom environment. ALP and link.exe is required. ; nmake -f mini.mak ; ; .386 ALL segment byte public ; ; Constants ; impmod EQU restab ;data EQU ImReallySmall ; ; The LX header ; ;struct e32_exe /* New 32-bit .EXE header */ ;{ lxhdr db 'LX'; unsigned char e32_magic[2]; /* Magic number E32_MAGIC */ db 0 ; unsigned char e32_border; /* The byte ordering for the .EXE */ db 0 ; unsigned char e32_worder; /* The word ordering for the .EXE */ dd 0 ; unsigned long e32_level; /* The EXE format level for now = 0 */ dw 2 ; unsigned short e32_cpu; /* The CPU type */ dw 1 ; unsigned short e32_os; /* The OS type */ ; We can place the object table here I hope.. ; mpages is addjusted to hold the object flags. ; reserved is 1 which is no problem it seems. ; ; Object table with one entry. ; Defines a ; ;dbg0 db 'objtab' ;struct o32_obj /* Flat .EXE object table entry */ ;{ ;objtab dd 11000h ; unsigned long o32_size; /* Object virtual size */ ; dd 10000h ; unsigned long o32_base; /* Object base virtual address */ ; ; unsigned long o32_flags; /* Attribute flags */ ; dd (1h OR 2h OR 2000h OR 10h) ;=2013h ; dd 1 ; unsigned long o32_pagemap; /* Object page map index */ ; dd 1 ; unsigned long o32_mapsize; /* Number of entries in object page map */ ; dd 0 ; unsigned long o32_reserved; /* Reserved */ ;}; objtab: dd 20000h ; unsigned long e32_ver; /* Module version */ ; unsigned long e32_mflags; /* Module flags */ dd 200h OR 00h dd 2013h ; unsigned long e32_mpages; /* Module # pages */ dd 1 ; unsigned long e32_startobj; /* Object # for instruction pointer */ dd 1 ; unsigned long e32_eip; /* Extended instruction pointer */ dd 1 ; unsigned long e32_stackobj; /* Object # for stack pointer */ dd 1000h ; unsigned long e32_esp; /* Extended stack pointer */ dd 1000h ; unsigned long e32_pagesize; /* .EXE page size */ dd 0 ; unsigned long e32_pageshift; /* Page alignment shift in .EXE */ ; unsigned long e32_fixupsize; /* Fixup section size */ dd offset fixrecend - offset fixpagetab ; allways used together with _ldrsize. dd 0 ; unsigned long e32_fixupsum; /* Fixup section checksum */ ; unsigned long e32_ldrsize; /* Loader section size */ dd offset data - offset objtab dd 0 ; unsigned long e32_ldrsum; /* Loader section checksum */ ; unsigned long e32_objtab; /* Object table offset */ dd offset objtab dd 1 ; unsigned long e32_objcnt; /* Number of objects in module */ ; unsigned long e32_objmap; /* Object page map offset */ dd offset pagetab ; unsigned long e32_itermap; /* Object iterated data map offset */ off=4ch dd offset data dd 0 ; unsigned long e32_rsrctab; /* Offset of Resource Table */ dd 0 ; unsigned long e32_rsrccnt; /* Number of resource entries */ ; unsigned long e32_restab; /* Offset of resident name table */ dd offset restab dd 0 ; unsigned long e32_enttab; /* Offset of Entry Table */ dd 0 ; unsigned long e32_dirtab; /* Offset of Module Directive Table */ available dd 0 ; unsigned long e32_dircnt; /* Number of module directives */ available ; unsigned long e32_fpagetab; /* Offset of Fixup Page Table */ dd offset fixpagetab ; unsigned long e32_frectab; /* Offset of Fixup Record Table */ dd offset fixrec ; unsigned long e32_impmod; /* Offset of Import Module Name Table */ dd offset impmod dd 1 ; unsigned long e32_impmodcnt; /* Number of entries in Import Module Name Table */ dd 0 ; unsigned long e32_impproc; /* Offset of Import Procedure Name Table */ off = 78 ;dd offset impproc dd 0 ; unsigned long e32_pagesum; /* Offset of Per-Page Checksum Table */ available ; unsigned long e32_datapage; /* Offset of Enumerated Data Pages */ dd offset data ; redefine these entries as obj tab stuff. ;red dd 0 ; unsigned long e32_preload; /* Number of preload pages */ available! ;red dd 0 ; unsigned long e32_nrestab; /* Offset of Non-resident Names Table */ available? ;red dd 0 ; unsigned long e32_cbnrestab; /* Size of Non-resident Name Table */ available? ;red dd 0 ; unsigned long e32_nressum; /* Non-resident Name Table Checksum */ available? ;red dd 0 ; unsigned long e32_autodata; /* Object # for automatic data object */ available? ;red dd 0 ; unsigned long e32_debuginfo; /* Offset of the debugging information */ available? ; ;red dd 0 ; unsigned long e32_debuglen; /* The length of the debugging info. in bytes */ available? ;red dd 0 ; unsigned long e32_instpreload;/* Number of instance pages in preload section of .EXE file */ available? ;red dd 0 ; unsigned long e32_instdemand; /* Number of instance pages in demand load section of .EXE file */ available? ;red dd 0 ; unsigned long e32_heapsize; /* Size of heap - for 16-bit apps */ available? ;mv dd 1000h-32; unsigned long e32_stacksize; /* Size of stack */ ;dd 0,0,0,0 ; ; fixup table. ; ;dbg2 db 'fixpagetab' fixpagetab dd 0 ; offset of fixups for page 1. ;ntx high 0!dd (offset fixrecend - offset fixrec) ; end of fixup table - needed? dw (offset fixrecend - offset fixrec) ; end of fixup table - needed? ; ; Page entry for our one page. ; ;dbg1 db 'pagetab' pagetab dd 0 ; offset 0 dw offset dataend - offset data ; data size, dw 0 ; flags. valid ;dw 0 ;dd 1000h-36; unsigned long e32_stacksize; /* Size of stack */ ;dd 20 dup(0); unsigned char e32_res3[E32RESBYTES3]; available! ; /* Pad structure to 196 bytes */ ; }; ; ; The fixup records. ; ; Make one single fixup record which imports the DosPutMessage API. ; That api have ordinal 5 ; 32-bit offset fixup ; ;dbg3 db 'fixrec' ;struct r32_rlc /* Relocation item */ ;{ fixrec db 08h ; unsigned char nr_stype; /* Source type - field shared with new_rlc */ ; unsigned char nr_flags; /* Flag byte - field shared with new_rlc */ db (1h OR 80h) ; imp. ord.; 8 bit ordinal ; short r32_soff; /* Source offset */ dw (offset fixup - offset data) db 1h ; unsigned short r32_objmod; /* Target object number or Module ordinal */ ; ; union targetid ; { ; offset intref; /* Internal fixup */ ; ; union extfixup ; { ; offset proc; /* Procedure name offset */ db 5h ; unsigned long ord; /* Procedure odrinal */ ; } ; extref; /* External fixup */ ; ; struct addfixup ; { ; unsigned short entry; /* Entry ordinal */ ; offset addval; /* Value added to the address */ ; } ; addfix; /* Additive fixup */ ; } ; r32_target; /* Target data */ ; unsigned short r32_srccount; /* Number of chained fixup records */ ; unsigned short r32_chain; /* Chain head */ ;}; fixrecend: ; ; Imports the MSG dll. ; restab db 3,'MSG' ; now e32_stacksize impproc: db 0 assume CS:ALL data: int 3 minilx: ; int 3 push offset ImReallySmall - offset data + 10000h push 18 push eax ; 0 or 1 is just the same. ;call DosPutMessage db 0e8h fixup dd 0h add esp, 12 ret ImReallySmall db "I'm really small!",0ah db 0,0,0 ;lxdump db 'lxdumplxdumplxdumplxdump' ; db 'lxdumplxdumplxdumplxdump' ; db 'lxdumplxdumplxdumplxdump' dataend: ALL ENDS END endif