让我们假设RSP指向地址：地址

; Moving some value to rax and pushing to stack
 mov rax, "romulomo" 
 push rax 

;                                      +-> RSP=0xFF1E98-8
;Low              stack                |         High
;+-------------------------------------+--------+
;|                                     |romulomo| 
;+-------------------------------------+--------+
; RSP=0xFF1E90 | RBP=0xXXXXXXX
 

; Moving rbp to same location of rsp that points to "romulomo"
 mov rbp, rsp

; RSP=0xFF1E90 | RBP=0xFF1E90
 
; Moving a debug byte to position rbp-1
 mov BYTE [rbp-1], "#"

;                                       +-> RBP = RSP = 0xFF1E90
;Low              stack           |RBP-1|         High
;+--------------------------------+-----+--------+
;|                                |  #  |romulomo| 
;+--------------------------------+-----+--------+
; RSP=0xFF1E90 | RBP=0xFF1E90

; mov BYTE [rbp+1], "#" ; to replace the first "o" with "#": r#mulomo

;                                         
;Low              stack           |RBP-1|RBP|RBP+1|      RBP+8
;+--------------------------------+-----+---+-----+------+
;|                                |  #  | r |  o  |mulomo| 
;+--------------------------------+-----+---+-----+------+

 ; Printing everything
 mov rax, 1          ; __NR_write
 mov rdi, 1          ; fd = stdout

 lea rsi, [rbp]      ; mov rsi, rbp  would be more efficient
;            RSI = start of buffer = RBP = RSP = 0xFF1E90
;Low              stack           |RBP-1|         High
;+--------------------------------+-----+--------+
;|                                |  #  |romulomo| 
;+--------------------------------+-----+--------+

 mov rdx, 8          ; length = 8 bytes
 syscall             ; write(1, rsi, 8)

 ; Exit from program
 mov rax, 60
 syscall