178 lines
2.9 KiB
NASM
178 lines
2.9 KiB
NASM
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format ELF
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public main
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include 'ccall.inc'
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section '.text' executable align 16
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main:
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mov ecx,[esp+4]
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mov [argc],ecx
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mov ebx,[esp+8]
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mov [argv],ebx
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mov [display_handle],1
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call get_params
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jnc make_listing
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mov esi,_usage
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call display_string
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ccall exit,2
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make_listing:
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call listing
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ccall exit,0
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error:
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mov [display_handle],2
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mov esi,_error_prefix
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call display_string
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pop esi
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call display_string
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mov esi,_error_suffix
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call display_string
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ccall exit,0
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get_params:
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mov ecx,[argc]
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mov ebx,[argv]
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add ebx,4
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dec ecx
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jz bad_params
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get_param:
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mov esi,[ebx]
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mov al,[esi]
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cmp al,'-'
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je option_param
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cmp [input_file],0
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jne get_output_file
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mov [input_file],esi
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jmp next_param
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get_output_file:
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cmp [output_file],0
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jne bad_params
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mov [output_file],esi
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jmp next_param
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option_param:
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inc esi
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lodsb
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cmp al,'a'
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je addresses_option
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cmp al,'A'
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je addresses_option
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cmp al,'b'
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je bytes_per_line_option
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cmp al,'B'
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je bytes_per_line_option
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bad_params:
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stc
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ret
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addresses_option:
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cmp byte [esi],0
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jne bad_params
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mov [show_addresses],1
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jmp next_param
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bytes_per_line_option:
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cmp byte [esi],0
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jne get_bytes_per_line_setting
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dec ecx
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jz bad_params
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add ebx,4
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mov esi,[ebx]
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get_bytes_per_line_setting:
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call get_option_value
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or edx,edx
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jz bad_params
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cmp edx,1000
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ja bad_params
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mov [code_bytes_per_line],edx
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next_param:
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add ebx,4
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dec ecx
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jnz get_param
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cmp [input_file],0
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je bad_params
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cmp [output_file],0
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je bad_params
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clc
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ret
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get_option_value:
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xor eax,eax
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mov edx,eax
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get_option_digit:
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lodsb
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cmp al,20h
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je option_value_ok
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cmp al,0Dh
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je option_value_ok
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or al,al
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jz option_value_ok
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sub al,30h
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jc invalid_option_value
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cmp al,9
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ja invalid_option_value
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imul edx,10
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jo invalid_option_value
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add edx,eax
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jc invalid_option_value
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jmp get_option_digit
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option_value_ok:
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dec esi
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clc
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ret
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invalid_option_value:
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stc
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ret
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include 'system.inc'
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include '..\listing.inc'
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section '.data' writeable align 4
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input_file dd 0
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output_file dd 0
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code_bytes_per_line dd 16
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show_addresses db 0
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line_break db 0Dh,0Ah
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_usage db 'listing generator for flat assembler',0Dh,0Ah
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db 'usage: listing <input> <output>',0Dh,0Ah
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db 'optional settings:',0Dh,0Ah
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db ' -a show target addresses for assembled code',0Dh,0Ah
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db ' -b <number> set the amount of bytes listed per line',0Dh,0Ah
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db 0
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_error_prefix db 'error: ',0
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_error_suffix db '.',0Dh,0Ah,0
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section '.bss' writeable align 4
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argc dd ?
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argv dd ?
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input dd ?
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assembled_code dd ?
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assembled_code_length dd ?
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code_end dd ?
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code_offset dd ?
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code_length dd ?
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output_handle dd ?
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output_buffer dd ?
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current_source_file dd ?
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current_source_line dd ?
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source dd ?
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source_length dd ?
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maximum_address_length dd ?
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address_start dd ?
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last_listed_address dd ?
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display_handle dd ?
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character db ?
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params rb 1000h
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characters rb 100h
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buffer rb 1000h
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