kolibrios/programs/develop/ktcc/trunk/libc.obj/source/crt/crt0.asm

;
;   2021, Edited by Coldy
;
;   This module same as original crt0.asm, but cut:
;     1. virtual header block (hparams change to __app_params, hpath change to __app_path)
;     2. init heap of memory - not needed because 68.18 (68.19) init heap implicitly
;        (it is does dll.obj)
;     3. loader (he lives in dll.obj)
;

format ELF
section '.text' executable
public start
public start as '_start'

extrn main

include '../../../../../../proc32.inc'
include '../../../../../../macros.inc'
__DEBUG__       = 0

__app_params   equ 0x1C     ; Pointer to program arguments
;__app_path     equ 0x20    ; Pointer to program path

start:
;DEBUGF 'Start programm\n'

    mov  [argc], 0
    mov  eax, [__app_params]
    test eax, eax
    jz   .without_path
    mov  eax, path
    cmp  word ptr eax, 32fh  ; '/#3'  UTF8 
    jne  .without_path
    mov  word ptr eax, 12fh  ; '/#1'  fix to CP866
.without_path:
    mov  esi, eax
    call push_param
; retrieving parameters
    mov  esi, params
    xor  edx, edx  ; dl - <20><><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>(1) <20><><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>(0)
                   ; dh - <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> (1 <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>, 0 <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>)
    mov  ecx, 1    ; cl = 1
                   ; ch = 0  <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD>
.parse: 
    lodsb
    test al, al
    jz   .run
    test dl, dl
    jnz  .findendparam
                     ;{<7B><><EFBFBD><EFBFBD> <20><><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    cmp  al, ' '
    jz   .parse  ;<3B><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>, <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    mov  dl, cl  ;<3B><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    cmp  al, '"'
    jz   @f      ;<3B><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    mov  dh, ch     ;<3B><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    dec  esi
    call push_param
    inc  esi
    jmp  .parse

  @@:  
    mov  dh, cl     ;<3B><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    call push_param ;<3B><><EFBFBD><EFBFBD> <20><> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD> <20><> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    jmp  .parse     ;<3B><><EFBFBD><EFBFBD> <20><><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>}

.findendparam:
    test dh, dh
    jz   @f ; <20><><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
    cmp  al, '"'
    jz   .clear
    jmp  .parse
  @@:  
    cmp  al, ' '
    jnz  .parse

.clear: 
    lea  ebx, [esi - 1]
    mov  [ebx], ch
    mov  dl, ch
    jmp  .parse

.run:
    push argv
    push [argc]
    call main
.exit:
    xor  eax,eax
    dec  eax
    int  0x40
    dd   -1
.crash:
    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 argc as '__argc'
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