我正在尝试转换我拥有的现有程序集程序，以便它可以在Windows上运行。它应该询问用户他们的名字，然后输出“你好名字”。我几乎让它工作但是从ReadConsole调用中获取实际读取的字符数有问题。
我的节目是：
extern ExitProcess ;windows API function to exit process
extern WriteConsoleA ;windows API function to write to the console window (ANSI version)
extern ReadConsoleA ;windows API function to read from the console window (ANSI version)
extern GetStdHandle ;windows API to get the for the console handle for input/output
section .data ;the .data section is where variables and constants are defined
hello db 'Hello ' ;db stands for 'define byte'
length equ $-hello ;get the length of the hello
;$ is the current memory location
;$-hello means the difference between the current location and
;where hello started
enter_name db 'Please enter your name: '
name_len equ $-enter_name
chars dd 0
section .bss ;the .bss section is where space is reserved for additional variables
name:
resb 30 ;reserve 30 bytes of space for the name
char_written:
resb 4
section .text ;the .text section is where the program code goes
global _main ;tells the machine which label to start program execution from
_main:
;get the output handle
mov rcx, -11 ;specifies that the output handle is required
call GetStdHandle ;returns value for handle to rax
;print message asking user for their name
mov rcx, rax
mov rdx, enter_name ;load the address of enter name message into rsi
mov r8, name_len ;move the length into the rdx register
mov r9, char_written
call WriteConsoleA
;get the input handle
mov rcx, -10 ;specifies that the input handle is required
call GetStdHandle
;get value from keyboard
mov rcx, rax ;place the handle for operation
mov rdx, name ;set name to receive input from keyboard
mov r8, 30 ;max number of characters to read
mov r9, chars ;stores the number of characters actually read
call ReadConsoleA
;print 'hello' + user's name message
;get the output handle
mov rcx, -11 ;specifies that the output handle is required
call GetStdHandle ;returns value for handle to rax
;print message asking user for their name
mov rcx, rax
mov rdx, hello ;load the address of enter name message into rsi
mov r8, length ;move the length into the rdx register
mov r9, char_written
call WriteConsoleA
mov rcx, -11 ;specifies that the output handle is required
call GetStdHandle ;returns value for handle to rax
;print name
mov rcx, rax
mov rdx, name ;load the address of enter name message into rsi
mov r8, chars ;move the length into the rdx register
mov r9, char_written
call WriteConsoleA
;exit the program
mov rcx, 0 ;exit code?
call ExitProcess
我在ReadConsole上阅读Windows API文档的方式是它需要以下参数：
我已经定义了一个标签name来接收字符，chars来接收实际的字符数。
阅读电话如下：
;get the input handle
mov rcx, -10 ;specifies that the input handle is required
call GetStdHandle
;get value from keyboard
mov rcx, rax ;place the handle for operation
mov rdx, name ;set name to receive input from keyboard
mov r8, 30 ;max number of characters to read
mov r9, chars ;stores the number of characters actually read
call ReadConsoleA
我的假设是，如果输入的名称是 Anna ，那么值 4 或 5 （包括换行符）应存储在字符。这似乎不是这种情况，因为当我尝试输出名称时，我对此代码一无所知：
mov rcx, -11 ;specifies that the output handle is required
call GetStdHandle ;returns value for handle to rax
;print name
mov rcx, rax
mov rdx, name ;load the address of enter name message into rsi
mov r8, chars ;move the length into the rdx register
mov r9, char_written
call WriteConsoleA
但如果我将chars标签切换为一个值，它按预期工作，即
mov rcx, -11 ;specifies that the output handle is required
call GetStdHandle ;returns value for handle to rax
;print name
mov rcx, rax
mov rdx, name ;load the address of enter name message into rsi
mov r8, 4 ;move the length into the rdx register
mov r9, char_written
call WriteConsoleA
显然我对这个缓冲区做错了 - 任何帮助都会非常感激。