Created
August 13, 2024 22:05
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| ; vim: set ft=nasm | |
| global _main | |
| extern _puts | |
| section .data | |
| hello: db "hello, " | |
| hello_len: equ $-hello | |
| section .text | |
| _main: | |
| lea rdi, [rel hello] | |
| call _puts | |
| call vendor | |
| call brand | |
| jmp exit | |
| vendor: | |
| sub rsp, 24 | |
| mov eax, 0 | |
| cpuid | |
| mov [rsp], ebx | |
| mov [rsp+4], edx | |
| mov [rsp+8], ecx | |
| mov byte [rsp+13], `\0` | |
| mov rdi, rsp | |
| call _puts | |
| add rsp, 24 | |
| ret | |
| brand: | |
| sub rsp, 64 | |
| xor rsi, rsi | |
| head: | |
| mov rdi, 16 | |
| imul rdi, rsi | |
| mov eax, 0x80000002 | |
| add eax, esi | |
| cpuid | |
| mov [rsp+rdi], eax | |
| mov [rsp+rdi+4], ebx | |
| mov [rsp+rdi+8], ecx | |
| mov [rsp+rdi+12], edx | |
| cmp esi, 3 | |
| je tail | |
| inc esi | |
| jmp head | |
| tail: | |
| mov rdi, rsp | |
| call _puts | |
| add rsp, 64 | |
| ret | |
| exit: | |
| mov eax, 0x02000001 | |
| mov edi, 0 | |
| syscall |
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