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format ELF

section '.text' executable

public start

extrn mf_init

extrn main

public argc as '__ARGS'

__DEBUG__ equ 1

__DEBUG_LEVEL__ equ 1

include 'DEBUG-FDO.INC'

virtual at 0

	db 'MENUET01' ; 1. Magic number (8 bytes)

	dd 0x01       ; 2. Version of executable file

	dd 0x0	      ; 3. Start address

	dd 0x0	      ; 4. Size of image

	dd 0x100000   ; 5. Size of needed memory

	dd 0x100000   ; 6. Pointer to stack

hparams dd 0x0	      ; 7. Pointer to program arguments

hpath	dd 0x0	      ; 8. Pointer to program path

end virtual

start:

DEBUGF 1,'Start programm\n'

    xor  eax,eax

    call mf_init

DEBUGF 1,' path "%s"\n params "%s"\n', path, params

; check for overflow

    mov  al, [path+buf_len-1]

    or	 al, [params+buf_len-1]

    jnz   .crash

; check if path written by OS

    mov  eax, [hparams]

    test eax, eax

    jz	 .without_path

    mov  eax, path

.without_path:

    mov  esi, eax

    call push_param

; retrieving parameters

    mov  esi, params

    xor  edx, edx  ; dl - èä¸ò ïàðàìåòð(1) èëè ðàçäåëèòåëè(0)

		   ; dh - ñèìâîë ñ êîòîðîãî íà÷àëñÿ ïàðàìåòð (1 êàâû÷êè, 0 îñòàëüíîå)

    mov  ecx, 1    ; cl = 1

		   ; ch = 0  ïðîñòî íîëü

.parse:

    lodsb

    test al, al

    jz	 .run

    test dl, dl

    jnz  .findendparam

		     ;{åñëè áûë ðàçäåëèòåëü

    cmp  al, ' '

    jz	 .parse  ;çàãðóæåí ïðîáåë, ãðóçèì ñëåäóþùèé ñèìâîë

    mov  dl, cl  ;íà÷èíàåòñÿ ïàðàìåòð

    cmp  al, '"'

    jz	 @f	 ;çàãðóæåíû êàâû÷êè

    mov  dh, ch     ;ïàðàìåòð áåç êàâû÷åê

    dec  esi

    call push_param

    inc  esi

    jmp  .parse

  @@:

    mov  dh, cl     ;ïàðàìåòð â êàâû÷åêàõ

    call push_param ;åñëè íå ïðîáåë çíà÷èò íà÷èíàåòñÿ êàêîé òî ïàðàìåòð

    jmp  .parse     ;åñëè áûë ðàçäåëèòåëü}

.findendparam:

    test dh, dh

    jz	 @f ; áåç êàâû÷åê

    cmp  al, '"'

    jz	 .clear

    jmp  .parse

  @@:

    cmp  al, ' '

    jnz  .parse

.clear:

    lea  ebx, [esi - 1]

    mov  [ebx], ch

    mov  dl, ch

    jmp  .parse

.run:

DEBUGF 1,'call main(%x, %x) with params:\n', [argc], argv

if __DEBUG__ = 1

    mov  ecx, [argc]

  @@:

    lea  esi, [ecx * 4 + argv-4]

    DEBUGF 1,'%d) "%s"\n', cx, [esi]

    loop @b

end if

    push argv

    push [argc]

    call main

.exit:

DEBUGF 1,'Exit from prog with code: %x\n', eax;

    xor  eax,eax

    dec  eax

    int  0x40

    dd	 -1

.crash:

DEBUGF 1,'E:buffer overflowed\n'

    jmp  .exit

;============================

push_param:

;============================

;parameters

;  esi - pointer

;description

;  procedure increase argc

;  and add pointer to array argv

;  procedure changes ebx

    mov  ebx, [argc]

    cmp  ebx, max_parameters

    jae  .dont_add

    mov  [argv+4*ebx], esi

    inc  [argc]

.dont_add:

    ret

;==============================

public params as '__argv'

public path as '__path'

section '.bss'

buf_len = 0x400

max_parameters=0x20

argc	 rd 1

argv	 rd max_parameters

path	 rb buf_len

params	 rb buf_len

section '.data'

include_debug_strings ; ALWAYS present in data section