623 lines
9.6 KiB
PHP
623 lines
9.6 KiB
PHP
; flat assembler
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; Copyright (c) 1999-2020, Tomasz Grysztar
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; All rights reserved.
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init_memory:
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; mov ecx, 16*1024*1024
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;
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; allocate_memory:
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mcall SF_SYSTEM, SSF_GET_FREE_RAM
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cmp eax, 0x38000000 shr 9
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jbe @f
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mov eax, 0x38000000 shr 9
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@@:
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shl eax, 9
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xchg eax, ecx
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mov [memory_setting],ecx
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mcall SF_SYS_MISC, SSF_MEM_ALLOC
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or eax,eax
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jz out_of_memory
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mov [memblock], eax
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mov [additional_memory],eax
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add eax,[memory_setting]
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mov [memory_end],eax
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mov eax,[memory_setting]
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shr eax,2
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add eax,[additional_memory]
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mov [additional_memory_end],eax
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mov [memory_start],eax
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ret
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exit_program:
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cmp [_mode],NORMAL_MODE
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jne @f
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mcall SF_SYS_MISC, SSF_MEM_FREE, [memblock]
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mov esp,[processing_esp]
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jmp still
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@@:
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or eax,-1
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mcall
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make_timestamp:
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push ebx
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mcall SF_SYSTEM_GET,SSF_TIME_COUNT
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imul eax,10
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pop ebx
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ret
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symbol_dump:
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push edi
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mov edx,[memory_end]
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symb_dump:
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cmp edx,[labels_list]
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jbe symbols_dumped
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sub edx,LABEL_STRUCTURE_SIZE
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cmp dword [edx+24],0
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je symb_dump ; do not dump anonymous symbols
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test byte [edx+8],1
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jz symb_dump ; do not dump symbols that didn't get defined
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mov ax,[current_pass]
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cmp ax,[edx+16]
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jne symb_dump
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test byte [edx+8],4 or 2
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jnz symb_dump ; do not dump assembly-time variables
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; do not dump variables defined with '='
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cmp word [edx+12], 0
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jnz symb_dump ; do not dump register-based variables
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mov al, '0'
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stosb
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mov al, 'x'
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stosb
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mov eax, [edx+4]
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mov ecx, 8
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@@:
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rol eax, 4
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test al, 0xF
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loopz @b
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jz .nohigh
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inc ecx
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@@:
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push eax
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and al, 0xF
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cmp al, 10
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sbb al, 69h
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das
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stosb
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pop eax
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rol eax, 4
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loop @b
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mov eax, [edx]
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mov ecx, 8
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jmp .low
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.nohigh:
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mov eax, [edx]
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mov ecx, 8
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@@:
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rol eax, 4
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test al, 0xF
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loopz @b
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inc ecx
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.low:
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push eax
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and al, 0xF
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cmp al, 10
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sbb al, 69h
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das
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stosb
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pop eax
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rol eax, 4
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loop .low
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mov al, ' '
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stosb
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mov esi,[edx+24]
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movzx ecx,byte [esi-1]
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rep movsb
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mov ax,0A0Dh
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stosw
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jmp symb_dump
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symbols_dumped:
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mov edx,dbgfilename
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push esi edi
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mov esi, outfile
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mov edi, edx
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@@:
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lodsb
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stosb
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test al, al
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jnz @b
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lea ecx, [edi-1]
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@@:
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dec edi
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cmp edi, edx
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jb @f
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cmp byte [edi], '/'
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jz @f
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cmp byte [edi], '.'
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jnz @b
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mov ecx, edi
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@@:
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mov dword [ecx], '.dbg'
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mov byte [ecx+4], 0
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pop edi esi
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call create
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mov edx,[esp]
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mov ecx,edi
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sub ecx,edx
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call write
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call close
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pop edi
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ret
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get_environment_variable:
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mov ecx,[memory_end]
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sub ecx,edi
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cmp ecx,7
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jb out_of_memory
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cmp dword[esi],'INCL'
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jne .finish
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mov esi,_ramdisk
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mov ecx,6
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cld
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rep movsb
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.finish:
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; stc
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ret
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alloc_handle:
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call make_fullpaths
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mov ebx, fileinfos+4
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@@:
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cmp dword [ebx], -1
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jz .found
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add ebx, 4+20+MAX_PATH
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cmp ebx, fileinfos_end
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jb @b
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stc
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ret
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.found:
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and dword [ebx+4], 0
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and dword [ebx+8], 0
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push esi edi ecx
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mov esi, fullpath_open
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lea edi, [ebx+20]
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mov ecx, MAX_PATH
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rep movsb
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pop ecx edi esi
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ret ; CF=0
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create:
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call alloc_handle
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jc .ret
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and dword [ebx-4], 0
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mov dword [ebx], 2
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.ret:
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ret
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open:
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; call make_fullpaths
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;; mov eax,fullpath_open
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;; DEBUGF '"%s"\n',eax
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; mov dword[file_info_open+8],-1
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; mcall 58,file_info_open
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; or eax,eax ; found
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; jz @f
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; cmp eax,6
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; jne file_error
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;@@: mov [filesize],ebx
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; clc
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; ret
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;file_error:
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; stc
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; ret
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call alloc_handle
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jc .ret
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mov dword [ebx], SSF_GET_INFO
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and dword [ebx+12], 0
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mov dword [ebx+16], fileinfo
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mov eax, SF_FILE
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push ebx
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mcall
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pop ebx
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test eax, eax
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jnz .fail
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mov eax, dword[fileinfo.size]
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mov [ebx-4], eax
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and dword [ebx], 0
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.ret:
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ret
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.fail:
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or dword [ebx], -1 ; close handle
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stc
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ret
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read:
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; pusha
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; mov edi,edx
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; mov esi,[filepos]
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; add esi,0x20000
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; cld
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; rep movsb
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; popa
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;; ret
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mov [ebx+12], ecx
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mov [ebx+16], edx
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push ebx
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mov eax, SF_FILE
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mcall
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xchg eax, [esp]
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add [eax+4], ebx
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adc [eax+8], dword 0
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mov ebx, eax
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pop eax
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test eax, eax
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jz .ok
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cmp eax, 6
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jz .ok
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stc
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.ok:
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ret
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close:
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or dword [ebx], -1
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ret
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; ebx file handle
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; ecx count of bytes to write
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; edx pointer to buffer
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write:
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; pusha
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; mov [file_info_write+8],ecx
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; mov [file_info_write+12],edx
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; mov [filesize],edx
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; mov eax,58
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; mov ebx,file_info_write
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; mcall
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; popa
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; ret
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mov [ebx+12], ecx
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mov [ebx+16], edx
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push ebx
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mov eax, SF_FILE
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mcall
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xchg eax, [esp]
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add [eax+4], ebx
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adc [eax+8], dword 0
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mov ebx, eax
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pop eax
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mov byte [ebx], 3
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cmp eax, 1
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cmc
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ret
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make_fullpaths:
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pusha
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push edx
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mov esi,path ; open
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; DEBUGF " '%s'",esi
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mov edi,fullpath_open
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cld
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newc1:
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movsb
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cmp byte[esi],0;' '
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jne newc1
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mov esi,[esp]
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cmp byte[esi],'/'
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jne @f
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mov edi,fullpath_open
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@@:
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lodsb
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stosb
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cmp al,0
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jne @b
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; mov ecx,12
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; cld
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; rep movsb
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; mov byte[edi],0
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mov esi,path ; write
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mov edi,fullpath_write
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cld
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newc2:
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movsb
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cmp byte[esi],0;' '
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jne newc2
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mov esi,[esp]
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cmp byte[esi],'/'
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jne @f
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mov edi,fullpath_write
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@@:
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lodsb
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stosb
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cmp al,0
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jne @b
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; mov ecx,12
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; cld
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; rep movsb
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; mov byte[edi],0
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mov esi,path ; start
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mov edi,file_io_start.path
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cld
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newc3:
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movsb
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cmp byte[esi],0;' '
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jne newc3
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; mov esi,[esp]
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pop esi
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cmp byte[esi],'/'
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jne @f
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mov edi,file_io_start.path
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@@:
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lodsb
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stosb
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cmp al,0
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jne @b
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; mov ecx,12
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; cld
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; rep movsb
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; mov byte[edi],0
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; add esp,4
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popa
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ret
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lseek:
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cmp al,0
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jnz @f
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and dword [ebx+4], 0
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and dword [ebx+8], 0
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@@: cmp al,2
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jnz @f
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mov eax, [ebx-4]
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mov [ebx+4], eax
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and dword [ebx+8], 0
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@@: add dword [ebx+4], edx
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adc dword [ebx+8], 0
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ret
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display_character:
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pusha
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cmp [_mode],NORMAL_MODE
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jne @f
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cmp dl,13
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jz dc2
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cmp dl,0xa
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jnz dc1
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and [textxy],0x0000FFFF
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add [textxy], 8 shl 16 and 0xFFFF0000 + 18
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dc2:
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popa
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ret
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dc1:
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mov eax,[textxy]
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cmp ax,word[bottom_right]
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ja dc2
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shr eax,16
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cmp ax,word[bottom_right+2]
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ja dc2
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mov [dc],dl
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mcall SF_DRAW_TEXT,[textxy],0x10000000,dc,1
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add [textxy],0x00080000
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popa
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ret
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@@:
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mov eax,SF_BOARD
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mov ebx,1
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mov cl,dl
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mcall
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popa
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ret
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display_string:
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pusha
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@@:
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cmp byte[esi],0
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je @f
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mov dl,[esi]
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call display_character
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add esi,1
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jmp @b
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@@:
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popa
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ret
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display_number:
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push ebx
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mov ecx,1000000000
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xor edx,edx
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xor bl,bl
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display_loop:
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div ecx
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push edx
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cmp ecx,1
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je display_digit
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or bl,bl
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jnz display_digit
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or al,al
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jz digit_ok
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not bl
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display_digit:
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mov dl,al
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add dl,30h
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push ebx ecx
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call display_character
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pop ecx ebx
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digit_ok:
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mov eax,ecx
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xor edx,edx
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mov ecx,10
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div ecx
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mov ecx,eax
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pop eax
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or ecx,ecx
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jnz display_loop
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pop ebx
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ret
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display_user_messages:
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; push [skinh]
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; pop [textxy]
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; add [textxy], 7 shl 16 +53
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mov [displayed_count],0
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call show_display_buffer
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cmp [displayed_count],1
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jb line_break_ok
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je make_line_break
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mov ax,word[last_displayed]
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cmp ax,0A0Dh
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je line_break_ok
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cmp ax,0D0Ah
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je line_break_ok
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make_line_break:
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mov esi,crlf
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call display_string
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line_break_ok:
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ret
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display_block:
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pusha
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@@: mov dl,[esi]
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call display_character
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inc esi
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loop @b
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popa
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ret
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fatal_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 esi,crlf
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call display_string
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mov al,0FFh
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jmp exit_program
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assembler_error:
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call display_user_messages
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push dword 0
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mov ebx,[current_line]
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get_error_lines:
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push ebx
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test byte [ebx+7],80h
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jz display_error_line
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mov edx,ebx
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find_definition_origin:
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mov edx,[edx+12]
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test byte [edx+7],80h
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jnz find_definition_origin
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push edx
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mov ebx,[ebx+8]
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jmp get_error_lines
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display_error_line:
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mov esi,[ebx]
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call display_string
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mov esi,line_number_start
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call display_string
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mov eax,[ebx+4]
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and eax,7FFFFFFFh
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call display_number
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mov dl,']'
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call display_character
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pop esi
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cmp ebx,esi
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je line_number_ok
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mov dl,20h
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call display_character
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push esi
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mov esi,[esi]
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movzx ecx,byte [esi]
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inc esi
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call display_block
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mov esi,line_number_start
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call display_string
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pop esi
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mov eax,[esi+4]
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and eax,7FFFFFFFh
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call display_number
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mov dl,']'
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call display_character
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line_number_ok:
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mov esi,line_data_start
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call display_string
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mov esi,ebx
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mov edx,[esi]
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call open
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mov al,2
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xor edx,edx
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call lseek
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mov edx,[esi+8]
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sub eax,edx
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push eax
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xor al,al
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call lseek
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mov ecx,[esp]
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mov edx,[additional_memory]
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lea eax,[edx+ecx]
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cmp eax,[additional_memory_end]
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ja out_of_memory
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call read
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call close
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pop ecx
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mov esi,[additional_memory]
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get_line_data:
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mov al,[esi]
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cmp al,0Ah
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je display_line_data
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cmp al,0Dh
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je display_line_data
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cmp al,1Ah
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je display_line_data
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or al,al
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jz display_line_data
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inc esi
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loop get_line_data
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display_line_data:
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mov ecx,esi
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mov esi,[additional_memory]
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sub ecx,esi
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call display_block
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mov esi,crlf
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call display_string
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pop ebx
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or ebx,ebx
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jnz display_error_line
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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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jmp exit_program |