230 lines
3.5 KiB
NASM
230 lines
3.5 KiB
NASM
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format MZ
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heap 0
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stack 8000h
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entry loader:init
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include 'loader.inc'
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segment main use32
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start:
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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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mov ax,4C02h
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int 21h
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make_listing:
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call listing
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mov ax,4C00h
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int 21h
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error:
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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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mov ax,4C00h
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int 21h
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get_params:
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push ds
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mov ds,[psp_selector]
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mov esi,81h
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mov edi,params
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find_param:
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lodsb
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cmp al,20h
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je find_param
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cmp al,'-'
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je option_param
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cmp al,0Dh
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je all_params
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or al,al
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jz all_params
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cmp [es:input_file],0
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jne get_output_file
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mov [es:input_file],edi
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jmp process_param
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get_output_file:
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cmp [es:output_file],0
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jne bad_params
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mov [es:output_file],edi
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process_param:
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cmp al,22h
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je string_param
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copy_param:
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stosb
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lodsb
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cmp al,20h
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je param_end
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cmp al,0Dh
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je param_end
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or al,al
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jz param_end
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jmp copy_param
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string_param:
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lodsb
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cmp al,22h
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je string_param_end
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cmp al,0Dh
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je param_end
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or al,al
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jz param_end
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stosb
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jmp string_param
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option_param:
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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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invalid_option:
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pop ds
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stc
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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 bad_params_value
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cmp al,9
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ja bad_params_value
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imul edx,10
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jo bad_params_value
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add edx,eax
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jc bad_params_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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bad_params_value:
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stc
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ret
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bytes_per_line_option:
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lodsb
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cmp al,20h
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je bytes_per_line_option
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cmp al,0Dh
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je invalid_option
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or al,al
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jz invalid_option
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dec esi
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call get_option_value
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jc bad_params
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or edx,edx
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jz invalid_option
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cmp edx,1000
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ja invalid_option
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mov [es:code_bytes_per_line],edx
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jmp find_param
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addresses_option:
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lodsb
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cmp al,20h
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je set_addresses_option
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cmp al,0Dh
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je set_addresses_option
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or al,al
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jnz bad_params
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set_addresses_option:
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dec esi
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mov [es:show_addresses],1
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jmp find_param
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param_end:
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dec esi
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string_param_end:
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xor al,al
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stosb
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jmp find_param
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all_params:
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xor al,al
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stosb
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pop ds
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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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bad_params:
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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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_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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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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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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psp_selector dw ?
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environment_selector dw ?
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memory_handles_count dd ?
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memory_handles rd 400h
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params rb 1000h
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characters rb 100h
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segment buffer_segment
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buffer = (buffer_segment-main) shl 4
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db 1000h dup ?
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segment stack_segment
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stack_bottom = (stack_segment-main) shl 4
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db 4000h dup ?
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stack_top = stack_bottom + $
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