win32汇编addr指令

win32汇编中的addr指令是用来获取变量的地址的。它的语法如下：

addr variable_name

其中，`variable_name`是要获取地址的变量名。

例如，下面的代码中，`addr`指令用来获取`var`变量的地址，并将其存储在`eax`寄存器中：

.data
var DWORD 42

.code
main PROC
    mov eax, addr var
    ; 此时 eax 中存储的是 var 变量的地址
    ; ...
main ENDP

相关问题

win32实现秒表汇编语言代码

以下是一个基于 Win32 API 实现的秒表汇编语言代码示例：

.586
.model flat, stdcall
option casemap:none

include \masm32\include\windows.inc
include \masm32\include\user32.inc
include \masm32\include\kernel32.inc

includelib \masm32\lib\user32.lib
includelib \masm32\lib\kernel32.lib

.DATA
ClassName db "StopwatchClass",0
AppName db "Stopwatch",0
TimerID dd ?
StartTime dd ?
EndTime dd ?
ElapsedTime dd ?
Paused dd ?
PausedTime dd ?
hWin dd ?

.DATA?
hInstance HINSTANCE ?

.CODE

WinMain PROC hInst:HINSTANCE, hPrevInst:HINSTANCE, lpCmdLine:LPSTR, nShowCmd:DWORD
    LOCAL wc:WNDCLASS
    LOCAL msg:MSG

    mov hInstance, hInst
    
    ; Register the window class
    mov wc.style, CS_HREDRAW or CS_VREDRAW
    mov wc.lpfnWndProc, OFFSET WndProc
    mov wc.cbClsExtra, 0
    mov wc.cbWndExtra, 0
    push hInstance
    pop wc.hInstance
    mov wc.hbrBackground, COLOR_BTNFACE + 1
    mov wc.lpszMenuName, NULL
    mov wc.lpszClassName, OFFSET ClassName
    invoke RegisterClass, ADDR wc
    
    ; Create the window
    invoke CreateWindowEx, WS_EX_CLIENTEDGE, ADDR ClassName, ADDR AppName, WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, 200, 100, NULL, NULL, hInstance, NULL
    mov hWin, eax
    invoke ShowWindow, hWin, nShowCmd
    invoke UpdateWindow, hWin
    
    ; Message loop
    .WHILE TRUE
        invoke GetMessage, ADDR msg, NULL, 0, 0
        .BREAK .IF (!eax)
        invoke TranslateMessage, ADDR msg
        invoke DispatchMessage, ADDR msg
    .ENDW
    
    mov eax, msg.wParam
    ret
WinMain ENDP

WndProc PROC hWnd:HWND, uMsg:UINT, wParam:WPARAM, lParam:LPARAM
    LOCAL hdc:HDC
    LOCAL ps:PAINTSTRUCT
    LOCAL rect:RECT
    LOCAL szText:BYTE 20 DUP(?)
    LOCAL dwStyle:DWORD
    
    .IF uMsg == WM_CREATE
        ; Set the timer
        invoke SetTimer, hWnd, 1, 10, NULL
        mov TimerID, eax
        ; Set the start time
        invoke GetTickCount
        mov StartTime, eax
        ; Set the paused flag
        mov Paused, 0
        mov PausedTime, 0
    .ELSEIF uMsg == WM_DESTROY
        ; Kill the timer
        invoke KillTimer, hWnd, TimerID
        ; Quit the application
        invoke PostQuitMessage, NULL
    .ELSEIF uMsg == WM_PAINT
        ; Get the device context
        invoke BeginPaint, hWnd, ADDR ps
        mov hdc, eax
        ; Get the client area
        invoke GetClientRect, hWnd, ADDR rect
        ; Set the text color
        invoke SetTextColor, hdc, RGB(0, 0, 255)
        ; Set the text background color
        invoke SetBkColor, hdc, RGB(255, 255, 255)
        ; Set the font
        invoke SetBkMode, hdc, OPAQUE
        invoke CreateFont, 20, 0, 0, 0, FW_NORMAL, FALSE, FALSE, FALSE, DEFAULT_CHARSET, OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS, DEFAULT_QUALITY, DEFAULT_PITCH or FF_DONTCARE, ADDR szText
        invoke SelectObject, hdc, eax
        ; Calculate the elapsed time
        .IF Paused == 0
            invoke GetTickCount
            sub eax, StartTime
            add eax, PausedTime
            mov ElapsedTime, eax
        .ELSE
            mov eax, PausedTime
            mov ElapsedTime, eax
        .ENDIF
        ; Format the time as a string
        mov eax, ElapsedTime
        mov ebx, 1000
        div ebx
        mov ecx, eax
        mov eax, ElapsedTime
        mov edx, 1000
        div edx
        mov edx, eax
        mov eax, ecx
        invoke wsprintf, ADDR szText, ADDR FORMAT, eax, edx
        ; Draw the text
        invoke DrawText, hdc, ADDR szText, -1, ADDR rect, DT_CENTER or DT_VCENTER or DT_SINGLELINE
        ; Clean up
        invoke DeleteObject, eax
        invoke EndPaint, hWnd, ADDR ps
    .ELSEIF uMsg == WM_TIMER
        ; Redraw the window
        invoke InvalidateRect, hWnd, NULL, TRUE
    .ELSEIF uMsg == WM_LBUTTONDOWN
        ; Pause or unpause the stopwatch
        .IF Paused == 0
            invoke GetTickCount
            sub eax, StartTime
            mov PausedTime, eax
            mov Paused, 1
        .ELSE
            invoke GetTickCount
            mov StartTime, eax
            mov Paused, 0
        .ENDIF
    .ELSE
        ; Call the default window procedure for other messages
        invoke DefWindowProc, hWnd, uMsg, wParam, lParam
        ret
    .ENDIF
    
    xor eax, eax
    ret
WndProc ENDP

END WinMain

这个示例程序使用 Win32 API 来创建一个窗口，并在窗口中实现一个秒表。在窗口创建时，程序会设置一个定时器，每 10 毫秒触发一次。在每次定时器触发时，程序会重新绘制窗口，显示经过的时间。当用户点击窗口时，程序会暂停或恢复秒表的计时。程序使用 GetTickCount 函数来获取当前时间，以计算经过的时间。在窗口绘制时，程序使用 wsprintf 函数格式化时间为字符串，并使用 DrawText 函数在窗口中绘制时间文本。

win32汇编实现秒表计时，精确到毫秒

下面是一个Win32汇编秒表程序，使用了Windows API中的计时器函数来实现毫秒级的计时和显示：

.386
.model flat, stdcall
option casemap:none

include \masm32\include\windows.inc
include \masm32\include\user32.inc
includelib \masm32\lib\user32.lib
include \masm32\include\kernel32.inc
includelib \masm32\lib\kernel32.lib

.data
msg db 'Time:',13,10,0
count dd 0
tick dd 0
hWnd dd 0

.code
start:
; 创建窗口
invoke GetModuleHandle, NULL
mov hInstance, eax
invoke WinMain, hInstance, NULL, NULL, SW_SHOWDEFAULT
invoke ExitProcess, eax

WinMain proc hInst:HINSTANCE, hPrevInst:HINSTANCE, lpCmdLine:LPSTR, nCmdShow:DWORD
mov eax, hInst
mov hInstance, eax

; 注册窗口类
mov wc.cbSize, SIZEOF WNDCLASSEX
mov wc.style, CS_HREDRAW or CS_VREDRAW
mov wc.lpfnWndProc, offset WndProc
mov wc.cbClsExtra, 0
mov wc.cbWndExtra, 0
push hInstance
pop wc.hInstance
mov wc.hbrBackground, COLOR_WINDOW+1
mov wc.lpszMenuName, NULL
mov wc.lpszClassName, offset szClassName
push IDI_APPLICATION
push NULL
call LoadIcon
mov wc.hIcon, eax
mov wc.hIconSm, eax
push IDI_APPLICATION
push NULL
call LoadCursor
mov wc.hCursor, eax
invoke RegisterClassEx, addr wc

; 创建窗口
invoke CreateWindowEx, WS_EX_CLIENTEDGE, offset szClassName, offset szTitle, WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, 320, 240, NULL, NULL, hInstance, NULL
mov hWnd, eax
invoke ShowWindow, hWnd, SW_SHOW
invoke UpdateWindow, hWnd

; 设置计时器
invoke SetTimer, hWnd, 1, 1, NULL

; 消息循环
msgloop:
invoke GetMessage, ADDR msg, NULL, 0, 0
cmp eax, 0
je quit
invoke TranslateMessage, ADDR msg
invoke DispatchMessage, ADDR msg
jmp msgloop

quit:
invoke KillTimer, hWnd, 1
invoke DestroyWindow, hWnd
invoke UnregisterClass, offset szClassName, hInstance
mov eax, msg.wParam
ret

WndProc proc hWnd:HWND, uMsg:UINT, wParam:WPARAM, lParam:LPARAM
cmp uMsg, WM_CREATE
je wmcreate
cmp uMsg, WM_TIMER
je wmtimer
cmp uMsg, WM_PAINT
je wmpaint
cmp uMsg, WM_DESTROY
je wmdestroy
jmp defwndproc

wmcreate:
mov eax, 0
ret

wmtimer:
; 获取当前时间
invoke GetTickCount
mov tick, eax

; 计算时间差
sub eax, count
mov count, tick

; 更新窗口
invoke InvalidateRect, hWnd, NULL, TRUE
invoke UpdateWindow, hWnd
ret

wmpaint:
; 绘制文本
invoke BeginPaint, hWnd, ADDR ps
invoke GetClientRect, hWnd, ADDR rect
invoke SetTextColor, ps.hdc, 0000FFh
invoke SetBkMode, ps.hdc, TRANSPARENT
invoke TextOut, ps.hdc, 10, 10, ADDR msg, sizeof msg - 1
invoke wsprintf, ADDR buf, '%d.%03d', count / 1000, count % 1000
invoke TextOut, ps.hdc, 60, 10, ADDR buf, eax
invoke EndPaint, hWnd, ADDR ps
ret

wmdestroy:
mov eax, 0
jmp quit

defwndproc:
invoke DefWindowProc, hWnd, uMsg, wParam, lParam
ret

szClassName db 'MyWindowClass',0
szTitle db 'My Window',0
buf db 16 dup (?)
rect RECT <0, 0, 320, 240>
wc WNDCLASSEX ?
ps PAINTSTRUCT <>
hInstance HINSTANCE ?
hWnd HWND ?
msg MSG <>
count dd 0
tick dd 0

end start

该程序创建了一个窗口，通过设置计时器每1毫秒触发一次回调函数来实现计时和显示。在回调函数中，通过调用`GetTickCount`函数获取当前时间，计算时间差，并更新窗口显示。窗口绘制使用了Windows API中的GDI函数。

注意：该程序只是一个简单的示例，实际使用中可能需要更复杂的逻辑来处理计时和显示，同时需要注意计时器的精度和稳定性。