执行第4章介绍的CPUID指令，直接使用控制台输出函数将处理器识别字符串显示出来

以下是使用汇编代码实现CPUID指令并输出处理器识别字符串的示例：

section .data
    cpuid_string db "Processor identification string: ", 0
    buffer       db 13,10, "            ", 0
    eax_value    dd 0
    ebx_value    dd 0
    ecx_value    dd 0
    edx_value    dd 0

section .text
    global _start

_start:
    ; print the CPUID string
    mov eax, 0x80000002  ; set EAX to start of processor identification string
    mov esi, buffer      ; set ESI to point to buffer for storing identification string
    mov edi, eax_value   ; set EDI to point to buffer for storing the four DWORDs returned by CPUID

    ; execute CPUID four times to get all four DWORDs of the identification string
    cpuid                ; first execution of CPUID
    mov dword [edi], eax ; store first DWORD in buffer
    mov dword [edi+4], ebx ; store second DWORD in buffer
    mov dword [edi+8], ecx ; store third DWORD in buffer
    mov dword [edi+12], edx ; store fourth DWORD in buffer
    add edi, 16          ; move buffer pointer to next 16 bytes
    cmp eax, 0x80000004  ; check if we need to execute CPUID again
    jb print_string      ; if not, print the identification string

    cpuid                ; second execution of CPUID
    mov dword [edi], eax ; store first DWORD in buffer
    mov dword [edi+4], ebx ; store second DWORD in buffer
    mov dword [edi+8], ecx ; store third DWORD in buffer
    mov dword [edi+12], edx ; store fourth DWORD in buffer
    add edi, 16          ; move buffer pointer to next 16 bytes
    cmp eax, 0x80000005  ; check if we need to execute CPUID again
    jb print_string      ; if not, print the identification string

    cpuid                ; third execution of CPUID
    mov dword [edi], eax ; store first DWORD in buffer
    mov dword [edi+4], ebx ; store second DWORD in buffer
    mov dword [edi+8], ecx ; store third DWORD in buffer
    mov dword [edi+12], edx ; store fourth DWORD in buffer
    add edi, 16          ; move buffer pointer to next 16 bytes
    cmp eax, 0x80000006  ; check if we need to execute CPUID again
    jb print_string      ; if not, print the identification string

    cpuid                ; fourth execution of CPUID
    mov dword [edi], eax ; store first DWORD in buffer
    mov dword [edi+4], ebx ; store second DWORD in buffer
    mov dword [edi+8], ecx ; store third DWORD in buffer
    mov dword [edi+12], edx ; store fourth DWORD in buffer

print_string:
    ; print the CPUID string
    mov eax, 4           ; set EAX to 4 to call the "write" system call
    mov ebx, 1           ; set EBX to 1 to specify stdout
    mov ecx, cpuid_string ; set ECX to point to the CPUID string to print
    int 0x80             ; call the system call to print the string
    mov eax, 4           ; set EAX to 4 to call the "write" system call
    mov ebx, 1           ; set EBX to 1 to specify stdout
    mov ecx, buffer      ; set ECX to point to the buffer containing the identification string
    int 0x80             ; call the system call to print the identification string

exit:
    ; exit the program
    mov eax, 1           ; set EAX to 1 to call the "exit" system call
    xor ebx, ebx         ; set EBX to 0 to indicate success
    int 0x80             ; call the system call to exit the program

这段代码会使用CPUID指令获取处理器的识别字符串，并将其输出到控制台中。你可以将它保存为一个文件（例如`cpuid.asm`），使用汇编器和链接器将其编译成可执行文件，然后在终端中运行它。