我正在尝试使用Visual Studio 2019中的ml64.exe通过64位汇编进行一些Office自动化。在我可以调用Office COM接口之前，我需要调用CoInitialize。我目前正在测试初始化COM并将其写入控制台（我通常不编写汇编代码）（如果我注释掉命令行）>
call CoInitializeWriteConsoleW api调用按预期方式工作，并向屏幕“ COM初始化失败”输出消息。但是，一旦我添加调用CoInitialize，便没有任何输出到控制台屏幕，并且崩溃。]
; ************************************************************************* ; Proto types for API functions and structures ; ************************************************************************* EXTRN GetStdHandle:PROC EXTRN WriteConsoleW:PROC EXTRN CoCreateInstance:PROC EXTRN CoInitialize:PROC EXTRN SysFreeString:PROC EXTRN SysStringByteLen:PROC EXTRN SysAllocStringByteLen:PROC EXTRN OleRun:PROC EXTRN ExitProcess:PROC .const STD_OUTPUT_HANDLE = -11 STD_ERROR_HANDLE = -12 ; ************************************************************************* ; Object libraries ; ************************************************************************* includelib user32.lib includelib kernel32.lib includelib ole32.lib includelib oleaut32.lib ; ************************************************************************* ; Our data section. ; ************************************************************************* .data strErrComFailed dw 'C','O','M',' ','F','a','i','l','e','d',' ','t','o',' ','i','n','i','t','i','a','l','i','z','e',0,0 strErrOutlookFailed dw 'F','a','i','l','e','d',' ','t','o',' ','i','n','i','t','i','a','l','i','z','e',' ','O','u','t','l','o','o','k',0,0 ; {0006F03A-0000-0000-C000-000000000046} CLSID_OutlookApplication dd 0006f03ah dw 0000h dw 0000h dw 0C000h db 00h db 00h db 00h db 00h db 00h db 46h ; {00063001-0000-0000-C000-000000000046} IID_OutlookApplication dd 00063001h dw 0000h dw 0000h dw 0C000h db 00h db 00h db 00h db 00h db 00h db 46h ; {00000000-0000-0000-C000-000000000046} IID_IUnknown dd 00000000h dw 0000h dw 0000h dw 0C000h db 00h db 00h db 00h db 00h db 00h db 46h ; ************************************************************************* ; Our executable assembly code starts here in the .code section ; ************************************************************************* .code wcslen PROC inputString:QWORD LOCAL stringLength:QWORD mov QWORD PTR inputString, rcx mov QWORD PTR stringLength, 0h continue: mov rax, QWORD PTR inputString mov rcx, QWORD PTR stringLength movzx eax, word ptr [rax+rcx*2] test eax, eax je finished mov rax, QWORD PTR stringLength inc rax mov QWORD PTR stringLength, rax jmp continue finished: mov rax, QWORD PTR stringLength ret wcslen ENDP main PROC LOCAL hStdOutput:QWORD LOCAL hErrOutput:QWORD LOCAL hResult:DWORD xor ecx,ecx call CoInitialize mov DWORD PTR hResult, eax mov ecx, STD_OUTPUT_HANDLE call GetStdHandle mov QWORD PTR hStdOutput, rax mov ecx, STD_ERROR_HANDLE call GetStdHandle mov QWORD PTR hErrOutput, rax lea rcx,strErrComFailed call wcslen mov QWORD PTR [rsp+32], 0 xor r9d, r9d ; lpNumberOfCharsWritten mov r8d, eax ; nNumberOfCharsToWrite lea rdx,QWORD PTR strErrComFailed mov rcx,QWORD PTR hStdOutput call WriteConsoleW ; When the message box has been closed, exit the app with exit code eax mov ecx, eax call ExitProcess ret main ENDP End在被称为WinDbg的CoInitialize之前显示以下寄存器状态：
00007ff7`563e1041 e865000000 call Win64App+0x10ab (00007ff7`563e10ab) 0:000> r rax=00007ff7563e1037 rbx=0000000000000000 rcx=0000000000000000 rdx=00007ff7563e1037 rsi=0000000000000000 rdi=0000000000000000 rip=00007ff7563e1041 rsp=000000a905affa58 rbp=000000a905affa70 r8=000000a9058d6000 r9=00007ff7563e1037 r10=0000000000000000 r11=0000000000000000 r12=0000000000000000 r13=0000000000000000 r14=0000000000000000 r15=0000000000000000 iopl=0 nv up ei pl zr na po nc cs=0033 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00000246 Win64App+0x1041: 00007ff7`563e1041 e865000000 call Win64App+0x10ab (00007ff7`563e10ab) 0:000> r ecx ecx=0在被调用CoInitialize之后，存在以下寄存器状态：
0:000> r rax=0000000000000000 rbx=0000000000000000 rcx=8aa77f80a0990000 rdx=0000000000000015 rsi=0000000000000000 rdi=0000000000000000 rip=00007ff7563e1046 rsp=000000a905affa58 rbp=000000a905affa70 r8=0000029af97e2620 r9=0000029af97e1440 r10=0000000000000005 r11=000000a905aff9d8 r12=0000000000000000 r13=0000000000000000 r14=0000000000000000 r15=0000000000000000 iopl=0 nv up ei pl nz na po nc cs=0033 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00000206 Win64App+0x1046: 00007ff7`563e1046 8945ec mov dword ptr [rbp-14h],eax ss:000000a9`05affa5c=00000000 0:000> r eax eax=0调用GetStdHandle之后：
0:000> r rax=0000000000000074 rbx=0000000000000000 rcx=0000029af97d2840 rdx=0000000000000015 rsi=0000000000000000 rdi=0000000000000000 rip=00007ff7563e1053 rsp=000000a905affa58 rbp=000000a905affa70 r8=0000029af97e2620 r9=0000029af97e1440 r10=0000000000000005 r11=000000a905aff9d8 r12=0000000000000000 r13=0000000000000000 r14=0000000000000000 r15=0000000000000000 iopl=0 nv up ei pl nz na po nc cs=0033 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00000206在调用WriteConsoleW时，参数似乎仍然正确，但是屏幕上没有任何输出：
KERNEL32!WriteConsoleW: 00007ffb`a97028f0 ff258a4c0500 jmp qword ptr [KERNEL32!_imp_WriteConsoleW (00007ffb`a9757580)] ds:00007ffb`a9757580={KERNELBASE!WriteConsoleW (00007ffb`a697b750)} 0:000> du rdx 00007ff7`563e3000 "COM Failed to initialize" 0:000> r rax=0000000000000018 rbx=0000000000000000 rcx=0000000000000074 rdx=00007ff7563e3000 rsi=0000000000000000 rdi=0000000000000000 rip=00007ffba97028f0 rsp=000000a905affa50 rbp=000000a905affa70 r8=0000000000000018 r9=0000000000000000 r10=0000000000000005 r11=000000a905aff9d8 r12=0000000000000000 r13=0000000000000000 r14=0000000000000000 r15=0000000000000000 iopl=0 nv up ei pl zr na po nc cs=0033 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00000246 KERNEL32!WriteConsoleW: 00007ffb`a97028f0 ff258a4c0500 jmp qword ptr [KERNEL32!_imp_WriteConsoleW (00007ffb`a9757580)] ds:00007ffb`a9757580={KERNELBASE!WriteConsoleW (00007ffb`a697b750)}我尝试改用CoInitializeEx，但遇到相同的问题：
mov edx, COINIT_APARTMENTTHREADED ; dwCoInit (COINIT_APARTMENTTHREADED = 2) xor ecx, ecx ; pvReserved call CoInitializeEx我正在尝试使用Visual Studio 2019中的ml64.exe通过64位汇编进行一些Office自动化。在我可以调用Office COM接口之前，我需要调用CoInitialize。我目前只是...
x64 ABI require 执行调用指令时，堆栈始终按16字节对齐
也是32字节的保留空间。因此，在每个函数入口点，我们都有：