在堆栈上传递的参数不会传递给被调用的函数

Question

我正在使用 nasm、cl.exe 和 win32 API 调用在 x86-64 程序集中为 windows 编写游戏。我的应用程序成功创建了 window，但它的大小和位置不正确（它很高但水平方向很窄）。

这是我创建 window 的代码部分，并在使用 GetModuleHandleA(NULL) 获得 HINSTANCE 并注册 window [=33] 后显示它=] 与 RegisterClassA.

; Create The Window
mov RCX, 0               ; dwExStyle
mov RDX, WindowClassName ; lpClassName
MOV R8,  WindowName      ; lpWindowName
MOV R9,  13565952        ; dwStyle

sub rsp, 48
mov qword[rbp - 48], 0    ; lpParam
mov RAX, qword[HINSTANCE] ; 
mov qword[rbp - 40], RAX  ; hInstance
mov qword[rbp - 32], 0    ; hMenu
mov qword[rbp - 24], 0    ; hWndParent
mov dword[rbp - 16], 1080 ; nHeight
mov dword[rbp - 12], 1920 ; nWidth
mov dword[rbp - 8],  100  ; Y
mov dword[rbp - 4],  100  ; X
call CreateWindowExA
mov qword[HWND], RAX      ; Save the window handle

; Show The Window
mov RCX, qword[HWND]
mov RDX, 5                ; SW_SHOW
call ShowWindow

我在二进制忍者中查看了它，我向我展示了只有前 6 个参数被传递给 CreateWindowExA。我查看了 Microsoft's x64 calling convention，但没有发现任何错误。

根据它，参数是这样传递的： CreateWindowExA(dwExStyle: 0, lpClassName: 0x403010, lpWindowName: 0x403023, dwStyle: 0xcf0000, X: 0x438, Y: 0x64)。我确实注意到 X 的值是错误的，但我也不明白为什么。

在此先感谢您能给我的任何帮助！

如果有帮助，这是我的完整代码：

    global _start

    extern GetModuleHandleA
    extern RegisterClassA
    extern DefWindowProcA
    extern CreateWindowExA
    extern ShowWindow
    extern PeekMessageA
    extern TranslateMessage
    extern DispatchMessageA

    section .text

_start:
    ; Prologue
    push rbp
    mov  rbp, rsp

    ; Get hInstance
    xor  RCX, RCX
    call GetModuleHandleA
    mov qword[HINSTANCE], RAX ; Save hInstance

    ; Register The Window Class
    mov dword[WNDCLASSA], 3                    ; style
    mov qword[WNDCLASSA + 8], DefWindowProcA   ; lpfnWndProc
    mov dword[WNDCLASSA + 12], 0               ; cbClsExtra
    mov dword[WNDCLASSA + 16], 0               ; cbWndExtra
    mov RAX, qword[HINSTANCE]
    mov qword[WNDCLASSA + 24], RAX             ; hInstance
    mov qword[WNDCLASSA + 32], 0               ; hIcon
    mov qword[WNDCLASSA + 40], 0               ; hCursor
    mov qword[WNDCLASSA + 48], 0               ; hbrBackground
    mov qword[WNDCLASSA + 56], 0               ; lpszMenuName
    mov qword[WNDCLASSA + 64], WindowClassName ; lpszClassName

    lea  RCX, WNDCLASSA
    call RegisterClassA

    ; Create The Window
    mov RCX, 0               ; dwExStyle
    mov RDX, WindowClassName ; lpClassName
    MOV R8,  WindowName      ; lpWindowName
    MOV R9,  13565952        ; dwStyle

    sub rsp, 48
    mov qword[rbp - 48], 0    ; lpParam
    mov RAX, qword[HINSTANCE] ; 
    mov qword[rbp - 40], RAX  ; hInstance
    mov qword[rbp - 32], 0    ; hMenu
    mov qword[rbp - 24], 0    ; hWndParent
    mov dword[rbp - 16], 1080 ; nHeight
    mov dword[rbp - 12], 1920 ; nWidth
    mov dword[rbp - 8],  100  ; Y
    mov dword[rbp - 4],  100  ; X
    call CreateWindowExA
    mov qword[HWND], RAX      ; Save the window handle

    ; Show The Window
    mov RCX, qword[HWND]
    mov RDX, 5
    call ShowWindow

a:
    jmp a

; Message Loop
message_loop:
    LEA RCX, MSG
    mov RDX, qword[HWND]
    mov R8, 0
    mov R9, 0
    sub rsp, 4
    mov dword[rbp - 4], 1
    call PeekMessageA

    LEA RCX, MSG
    call TranslateMessage

    LEA RCX, MSG
    call DispatchMessageA

    jmp message_loop

; Epilogue
mov rsp, rbp
pop rbp
ret

    section .data

HINSTANCE       dq 0
HWND            dq 0 
WindowClassName db 'Polar Window Class', 0
WindowName      db 'Polar Window',       0

    section .bss

WNDCLASSA resb 72
MSG       resb 48

Answer 1

我的代码有很多问题，所以我找不到所有问题都得到解决的问题。结果，这就是我如何在评论的帮助下解决我的问题（谢谢）。我没有分配 shadow space 并且我没有将我放在堆栈上的参数对齐到 8 个字节。我的汇编代码现在看起来像这样（未优化且没有异常处理）：

    global _start

    extern GetModuleHandleA
    extern RegisterClassA
    extern DefWindowProcA
    extern CreateWindowExA
    extern ShowWindow
    extern PeekMessageA
    extern TranslateMessage
    extern DispatchMessageA

    section .text

_start:
    ; Prologue
    push rbp
    mov  rbp, rsp

    ; Get hInstance
    xor  RCX, RCX

    call GetModuleHandleA
    
    mov qword[HINSTANCE], RAX ; Save hInstance

    ; Register The Window Class
    mov dword[WNDCLASSA], 3                    ; style
    mov qword[WNDCLASSA + 8], DefWindowProcA   ; lpfnWndProc
    mov dword[WNDCLASSA + 12], 0               ; cbClsExtra
    mov dword[WNDCLASSA + 16], 0               ; cbWndExtra
    mov RAX, qword[HINSTANCE]
    mov qword[WNDCLASSA + 24], RAX             ; hInstance
    mov qword[WNDCLASSA + 32], 0               ; hIcon
    mov qword[WNDCLASSA + 40], 0               ; hCursor
    mov qword[WNDCLASSA + 48], 0               ; hbrBackground
    mov qword[WNDCLASSA + 56], 0               ; lpszMenuName
    mov qword[WNDCLASSA + 64], WindowClassName ; lpszClassName

    lea  RCX, WNDCLASSA
    sub  rsp, 0x20 ; Shadow Space
    call RegisterClassA
    add  rsp, 0x20 ; Shadow Space

    ; Create The Window
    xor RCX, RCX             ; dwExStyle
    mov RDX, WindowClassName ; lpClassName
    MOV R8,  WindowName      ; lpWindowName
    MOV R9,  13565952        ; dwStyle

    sub rsp, 96

    mov qword[rsp + 20h + 56], 0    ; lpParam
    mov RAX, qword[HINSTANCE] ; 
    mov qword[rsp + 20h + 48], RAX  ; hInstance
    mov qword[rsp + 20h + 40], 0    ; hMenu
    mov qword[rsp + 20h + 32], 0    ; hWndParent
    mov qword[rsp + 20h + 24], 1080 ; nHeight
    mov qword[rsp + 20h + 16], 1920 ; nWidth
    mov qword[rsp + 20h + 8],  100  ; Y
    mov qword[rsp + 20h],      100  ; X

    call CreateWindowExA

    add rsp, 96

    mov qword[HWND], RAX ; Save the window handle

    ; Show The Window
    sub rsp, 0x20

    mov RCX, qword[HWND]
    mov RDX, 5
    call ShowWindow

    add rsp, 0x20

; Message Loop
message_loop:
    sub rsp, 48

    LEA RCX, [MSG]
    mov RDX, qword[HWND]
    mov R8, 0
    mov R9, 0
    mov qword[rsp + 20h], 1
    call PeekMessageA

    add rsp, 48

    sub rsp, 32

    LEA RCX, [MSG]
    call TranslateMessage

    LEA RCX, [MSG]
    call DispatchMessageA

    add rsp, 32

    jmp message_loop

    ; Epilogue
    mov rsp, rbp
    pop rbp
    ret

    section .data

HINSTANCE       dq 0
HWND            dq 0 
WindowClassName db 'Polar Window Class', 0
WindowName      db 'Polar Window',       0

    section .bss

WNDCLASSA resb 72
MSG       resb 48

在堆栈上传递的参数不会传递给被调用的函数

Arguments passed on the stack aren't being passed to the called function

winapi

assembly

x86-64

calling-convention