ASM Community

follow is some asm code I write when I learn at&t
I just want to learn or talk, learn is hard.
so, wish help some one.
sorry for my poor english

first display CPUID

#cpuid.s show extract the processor vendor ID

.section .data
output:
	.ascii "the processor vendor ID is 'XXXXXXXXXXXX'\n"

.section .text
.globl main
main:
	movl $0, %eax
	cpuid
	movl $output, %edi
	movl %ebx, 28(%edi)
	movl %edx, 32(%edi)
	movl %ecx, 36(%edi)

	movl $4, %eax
	movl $1, %ebx
	movl $output, %ecx
	movl $42, %edx
	int $0x80

	movl $1, %eax
	movl $0, %ebx
	int $0x80
	

next is code use crt

# cpuidinlib.s show extract the processor vendor ID using library

.section .data
output:
	.asciz "the processor vendor ID is %s\n"
	
.section .bss
	.lcomm buffer, 12
	
.section .text
.globl _start
_start:
	movq $0, %rax
	cpuid
	movq $buffer, %rdi
	movl %ebx, (%rdi)
	movl %edx, 4(%rdi)
	movl %ecx, 8(%rdi)

	movq $output, %rdi
	movq $buffer, %rsi
	xorq %rax, %rax
	call printf

	movq $0, %rdi
	xorq %rax, %rax
	call exit
	

have a joy