masm32读取文件函数x86-Windows

我一直在尝试读取写在.txt文件中的字符串，并在控制台上打印出来。但我似乎做得不对。有人能检查一下我的代码并告诉我出了什么问题吗？谢谢

include \masm32\include\masm32rt.inc

.data
  txtFilter db "*.txt",0

  txtFD WIN32_FIND_DATA <>
  txtHandle HANDLE ?
  fHandle HANDLE ?

  bufferLength db ?
  buffer db 5000 dup(?)
  lnt db "1024",0

  okay db "Okay!",0
  dokay db "Dokay!",0

.code
start:
  push offset txtFD
  push offset txtFilter
  call FindFirstFile

  mov txtHandle, eax

  push offset txtFD.cFileName
  call StdOut

  push 0
  push FILE_ATTRIBUTE_NORMAL
  push OPEN_EXISTING
  push 0
  push 0
  push FILE_APPEND_DATA
  push offset txtFD.cFileName
  call CreateFile

  .if eax == INVALID_HANDLE_VALUE
    jmp _error
  .else
    mov fHandle, eax
  .endif

  push 0
  push offset bufferLength
  push offset lnt
  push offset buffer
  push fHandle
  call ReadFile

  jmp _next

_error:
  push offset dokay
  call StdOut
  jmp _next

_okay:
  push offset okay
  call StdOut

_next:
  push offset buffer
  call StdOut

  push fHandle
  call CloseHandle

  push txtHandle
  call FindClose

  push 0
  call ExitProcess

end start

代码似乎无法读取我的txt文件中的内容。但是，我可以成功搜索我的txt文件并执行CreateFile功能，有四个问题：

缓冲区长度db？只保留一个字节。ReadFile将在那里存储一个DWORD并覆盖三个字节的缓冲区。如果有空值，StdOut将停止输出。是否将定义更改为bufferLength dd

lnt db 1024,0是一个字符串。ReadFile需要一个DWORD值。将其更改为lnt dd 1024

push FILE_APPEND_数据仅为写入创建句柄。将其更改为“推式读取”

推送偏移lnt传递一个指针。但是，ReadFile需要一个DWORD值。把它改成按lnt

就像这样：

include \masm32\include\masm32rt.inc

.data
    txtFilter db "*.txt",0

    txtFD WIN32_FIND_DATA <>
    txtHandle HANDLE ?
    fHandle HANDLE ?

;   bufferLength db ?
    bufferLength dd ?
    buffer db 5000 dup(?)
;   lnt db "1024",0
    lnt dd 1024

    okay db "Okay!",0
    dokay db "Dokay!",0

.code
start:
    push offset txtFD
    push offset txtFilter
    call FindFirstFile

    mov txtHandle, eax

    push offset txtFD.cFileName
    call StdOut

    ; https://msdn.microsoft.com/en-us/library/windows/desktop/aa363858(v=vs.85).aspx
    push 0                          ; HANDLE    hTemplateFile
    push FILE_ATTRIBUTE_NORMAL      ; DWORD     dwFlagsAndAttributes
    push OPEN_EXISTING              ; DWORD     dwCreationDisposition
    push 0                          ; LPSECURITY_ATTRIBUTES lpSecurityAttributes
    push 0                          ; DWORD     dwShareMode
;   push FILE_APPEND_DATA           ; DWORD     dwDesiredAccess
    push GENERIC_READ               ; DWORD     dwDesiredAccess
    push offset txtFD.cFileName     ; LPCTSTR   lpFileName,
    call CreateFile

    .if eax == INVALID_HANDLE_VALUE
        jmp _error
    .else
        mov fHandle, eax
    .endif

    ; https://msdn.microsoft.com/en-us/library/windows/desktop/aa365467(v=vs.85).aspx
    push 0                          ; LPOVERLAPPED lpOverlapped
    push offset bufferLength        ; LPDWORD   lpNumberOfBytesRead
;   push offset lnt                 ; DWORD     nNumberOfBytesToRead
    push lnt                        ; DWORD     nNumberOfBytesToRead
    push offset buffer              ; LPVOID    lpBuffer
    push fHandle                    ; HANDLE    hFile
    call ReadFile

    jmp _next

_error:
    push offset dokay
    call StdOut
    jmp _next

_okay:
    push offset okay
    call StdOut

_next:
    push offset buffer
    call StdOut

    push fHandle
    call CloseHandle

    push txtHandle
    call FindClose

    push 0
    call ExitProcess

end st

---

调用ReadFile时，您正在推送偏移量lnt，而不仅仅是lnt。nNumberOfBytesToRead参数是按值传递的，而不是按地址传递的。此外，我怀疑您是否必须以ascii字符串形式提供长度lnt。我会试试“lnt dd 1024”