Ассемблер ошибка а 2008

I’m trying to write a bootloader for an OS I’m developing.

I’m getting a syntax error on the first line.

Here is my assembly code:

.286 ; CPU Type
.model TINY  ; memory of model
;---------------------- EXTERNS -----------------------------
extrn               _BootMain:near     ; prototype of C func
;------------------------------------------------------------
;------------------------------------------------------------   
.code 
org             07c00h         ; for BootSector
_main:
                jmp short _start       ; go to main
                nop

;----------------------- CODE SEGMENT -----------------------
_start: 
        cli
        mov ax,cs               ; Setup segment registers
        mov ds,ax               ; Make DS correct
        mov es,ax               ; Make ES correct
        mov ss,ax               ; Make SS correct        
        mov bp,7c00h
        mov sp,7c00h           ; Setup a stack
        sti
                                ; start the program 
        call           _BootMain
        ret
        END _start
        END _main ; End of program

Here’s my compile line:

"*location*14.10.25017binHostX86x86ML.EXE"  /c StartPoint.asm

The error I’m getting:

StartPoint.asm(1): error A2008: syntax error : .

As far as I know, this line shouldn’t be a problem.

Thanks for the help

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description	title	ms.date	ms.topic	f1_keywords	helpviewer_keywords	ms.assetid
Learn more about: ML Nonfatal Error A2008	ML Nonfatal Error A2008	12/17/2019	error-reference	A2008	A2008	ca24157f-c88a-4678-ae06-3bc3cd956001

syntax error :

A token at the current location caused a syntax error.

One of the following may have occurred:

A dot prefix was added to or omitted from a directive.
A reserved word (such as C or SIZE) was used as an identifier.
An instruction was used that was not available with the current processor or coprocessor selection.
A comparison run-time operator (such as ==) was used in a conditional assembly statement instead of a relational operator (such as EQ).
An instruction or directive was given too few operands.
An obsolete directive was used.


 .data?
lpRasConn     dd ?
dwCb          dd ?
dwConnections dd ?
l_RASCONN RASCONN 0FFh dup ({})
l_Buffer_Size dd   ?
l_Conn_Count  dd   ?
.code



  


                       
  




start:
xor eax,eax
mov dwCb,eax
mov dwConnections,eax
mov lpRasConn,eax
; Call RasEnumConnections with lpRasConn = NULL. 
; dwCb is returned with the required buffer size and a return code of ERROR_BUFFER_TOO_SMALL
;invoke RasEnumConnections,lpRasConn, addr dwCb,addr dwConnections
invoke RasEnumConnections, addr l_RASCONN, addr l_Buffer_Size, addr l_Conn_Count
.if (eax== ERROR_BUFFER_TOO_SMALL)
; Allocate the memory needed for the array of RAS structure(s).
invoke GetProcessHeap
 mov edi,eax
 invoke HeapAlloc,edi,HEAP_ZERO_MEMORY,dwCb
 .if !(eax & eax)
 printf("HeapAlloc failed!",13,10)
;printf("RegOpenKeyEx %snn", LastError$())
jmp exit0
 .endif
 mov lpRasConn,eax



  


                       
  




; The first RASCONN structure in the array must contain the RASCONN structure size
 mov esi,lpRasConn
 mov [esi].RASCONN.dwSize,sizeof RASCONN
; Call RasEnumConnections to enumerate active connections
 invoke RasEnumConnections,esi,addr dwCb,addr dwConnections
; If successful, print the names of the active connections.
 .if !(eax & eax)
  printf("The following RAS connections are currently active:",13,10)
   xor ebx,ebx
     .repeat
       lea eax,[esi].RASCONN.szEntryName
       ;printf("%s",13,10),eax
       printf("%sn",eax)
       add esi,sizeof RASCONN
       inc ebx
     .until (ebx>=dwConnections)
  .endif
;Deallocate memory for the connection buffer
 invoke HeapFree,edi,0,lpRasConn
 jmp exit0
.endif



  


                       
  




; There was either a problem with RAS or there are no connections to enumerate
.if(dwConnections >= 1)
 printf("The operation failed to acquire the buffer size.",13,10)
.else
printf("There are no active RAS connections.",13,10)
.endif
exit0:
; terminate the Remote Access Connection
invoke RasHangUp, l_RASCONN.hrasconn
invoke Sleep,1500 ; give the system enuf time to end the connection
                  ; Don't want to leave the port in an inconsistent state.



  


                       
  




invoke ExitProcess,0
end start
 ; 
 ; i think you need fill some params in your sample before RasEnumConnections API is called:
 ; CODE
 ; 
 ; mov l_RASCONN.RASCONN.dwSize, sizeof RASCONN
 ; mov l_Buffer_Size, sizeof l_RASCONN

Источник

hey Max

thanks for the help.

I am using MS compiler to compile from .cpp to .asm.

As per your suggestion i turned the RTC option off and now it doesnt show this error …..BUT now it shows a new error to me

Compiling…
test.cpp
Linking…

test.obj : error LNK2005: «`string'» (??_C@_0M@LACCCNMM@hello?5world?$AA@) already defined in test.obj

test.obj : error LNK2005: _main already defined in test.obj

Debug/test.exe : fatal error LNK1169: one or more multiply defined symbols found

i am pasting my small test.cpp code and the .asm generated

test.cpp

#include «stdafx.h»

int

_tmain(int argc, _TCHAR* argv[])

{

printf(«hello world»);

return 0;

}

test.asm

; Listing generated by Microsoft Optimizing Compiler Version 13.10.3077

TITLE . est.cpp

.386P

include listing.inc

if @Version gt 510

.model FLAT

else

_TEXT SEGMENT PARA USE32 PUBLIC ‘CODE’

_TEXT ENDS

_DATA SEGMENT DWORD USE32 PUBLIC ‘DATA’

_DATA ENDS

CONST SEGMENT DWORD USE32 PUBLIC ‘CONST’

CONST ENDS

_BSS SEGMENT DWORD USE32 PUBLIC ‘BSS’

_BSS ENDS

$$SYMBOLS SEGMENT BYTE USE32 ‘DEBSYM’

$$SYMBOLS ENDS

$$TYPES SEGMENT BYTE USE32 ‘DEBTYP’

$$TYPES ENDS

_TLS SEGMENT DWORD USE32 PUBLIC ‘TLS’

_TLS ENDS

; COMDAT ??_C@_0M@LACCCNMM@hello?5world?$AA@

CONST SEGMENT DWORD USE32 PUBLIC ‘CONST’

CONST ENDS

xdata$x SEGMENT DWORD USE32 PUBLIC ‘CONST’

xdata$x ENDS

; COMDAT _main

_TEXT SEGMENT PARA USE32 PUBLIC ‘CODE’

_TEXT ENDS

; COMDAT ?_Psave@?$_Facetptr@V?$ctype@G@std@@@std@@2PBVfacet@locale@2@B

_DATA SEGMENT DWORD USE32 PUBLIC ‘DATA’

_DATA ENDS

; COMDAT ?_Psave@?$_Facetptr@V?$ctype@D@std@@@std@@2PBVfacet@locale@2@B

_DATA SEGMENT DWORD USE32 PUBLIC ‘DATA’

_DATA ENDS

sxdata SEGMENT DWORD USE32 ‘SXDATA’

sxdata ENDS

FLAT GROUP _DATA, CONST, _BSS

ASSUME CS: FLAT, DS: FLAT, SS: FLAT

endif

INCLUDELIB LIBCD

INCLUDELIB OLDNAMES

PUBLIC _main

PUBLIC ??_C@_0M@LACCCNMM@hello?5world?$AA@ ; `string’

EXTRN _printf:NEAR

; COMDAT ??_C@_0M@LACCCNMM@hello?5world?$AA@

; File c:documents and settingssdesaimy documentsvisual studio projects est est.cpp

CONST SEGMENT

??_C@_0M@LACCCNMM@hello?5world?$AA@ DB ‘hello world’, 00H ; `string’

; Function compile flags: /Odt /ZI

CONST ENDS

; COMDAT _main

_TEXT SEGMENT

_argc$ = 8 ; size = 4

_argv$ = 12 ; size = 4

_main PROC NEAR ; COMDAT

; Line 7

push ebp

mov ebp, esp

sub esp, 64 ; 00000040H

push ebx

push esi

push edi

; Line 8

push OFFSET FLAT:??_C@_0M@LACCCNMM@hello?5world?$AA@

call _printf

add esp, 4

; Line 9

xor eax, eax

; Line 10

pop edi

pop esi

pop ebx

mov esp, ebp

pop ebp

ret 0

_main ENDP<
/P>

_TEXT ENDS

END

thanks in advance for your help

Shippi

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Programming Эксперт 94731 / 64177 / 26122 Регистрация: 12.04.2006 Сообщений: 116,782	18.09.2019, 23:37
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