我四处寻找，但我没有找到任何东西。
代码如下：
hello_world db "Hello World!",10
.hellolen equ $ - hello_world
get_input db "Enter a number: ",10
.getlen equ $ - get_input
input times 10 db 0
.len equ $ - input
section .text
global start
; Arguments go in the registers
;RDI, RSI, RDX, R10, R8, and R9, in order.
;System call number goes into RAX.
start:
call printHello
call askInput
call takeInput
call printInput
call exit
ret
printHello:
mov rax, 0x2000004
mov rdi, 1
mov rsi, hello_world
mov rdx, hello_world.hellolen
syscall
askInput:
mov rax, 0x2000004 ; System call write = 4
mov rdi, 1 ; Write to standard out = 1
mov rsi, get_input ; The address of enter string
mov rdx, get_input.getlen ; The size to write
syscall
takeInput:
mov rax, 0x2000003 ; System call read = 3
mov rdi, 2 ;
mov rsi, input ; buffer that we are reading to
mov rdx, input.len ;to create buffer overflow
;we can input more than
;input.len
syscall
printInput:
mov rax, 0x2000004 ; System call write = 4
mov rdi, 1 ; Write to standard out = 1
mov rsi, input ; The address of enter string
mov rdx, input.len ; The size to write
syscall
exit:
mov rax, 0x2000001 ; System call number for exit = 1
mov rdi, 0 ; Exit success = 0
syscall ; Invoke the kernel
输出：
Hello World!
Enter a number:
r: <- weird random r:
test <- input by me
test <- correct value returned
有没有办法用GDB查看这个，以便我可以找出导致这个问题的原因？我不确定如何从故障排除的角度来处理这个问题。谢谢！
我根据评论编辑了代码，但我仍然在输出中得到相同的奇数r:。