103 lines
1.5 KiB
NASM
103 lines
1.5 KiB
NASM
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format ELF
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section '.text' executable
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public start_
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extrn main
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buf_len = 0x400
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max_parameters=0x20
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start_:
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db 'MENUET01' ; 1. Magic number (8 bytes)
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dd 0x01 ; 2. Version of executable file
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dd start__ ; 3. Start address
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dd 0x0 ; 4. Size of image
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dd 0x100000 ; 5. Size of needed memory
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dd 0x100000 ; 6. Pointer to stack
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hparams dd params ; 7. Pointer to program arguments
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hpath dd path ; 8. Pointer to program path
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start__:
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;init heap of memory
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mov eax,68
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mov ebx,11
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int 0x40
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mov ebx,path
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mov ecx,dword buf_len
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add ebx,ecx
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next_simbol_check:
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xor eax,eax
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mov al,[ebx]
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cmp al,'/'
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je simbol_fined
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dec ebx
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dec ecx
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jnz next_simbol_check
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simbol_fined:
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inc ebx
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mov [argc],dword 1
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mov edx,argv
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mov [edx],ebx ;argument number 0 - program name
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cmp [params],byte 0
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je exit_find_params
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mov [argc],dword 2
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mov ebx,params
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add edx,4
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mov [edx],ebx
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next_symbol_parse:
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xor eax,eax
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mov al,[ebx]
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test al,al
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jz exit_find_params
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cmp al,' '
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je save_param
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inc ebx
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jmp next_symbol_parse
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save_param:
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mov [ebx],byte 0
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inc ebx
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add edx,4
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mov [edx],ebx
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inc [argc]
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cmp [argc],max_parameters
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jae exit_find_params
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jmp next_symbol_parse
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exit_find_params:
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push argv
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push [argc]
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call main
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exit:
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xor eax,eax
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dec eax
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int 0x40
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dd -1
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crash:
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jmp exit
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public params as '__argv'
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public path as '__path'
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section '.bss'
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argc rd 1
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argv rd max_parameters
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path rb buf_len
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params rb buf_len
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