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SECTION .text
%macro PROC 1
align 16
global %1
%1:
%endmacro
;The first six integer or pointer arguments are passed in registers
;RDI, RSI, RDX, RCX, R8, and R9
;int
;cpuid_amd64(int eax_in, int ecx_in, int *eax, int *ebx, int *ecx, int *edx)
PROC cpuid_amd64
; save registers
push rbx
push rdx
push rcx
push r8
push r9
mov rax, rdi
mov rcx, rsi
cpuid
pop rdi
mov [rdi], edx
pop rdi
mov [rdi], ecx
pop rdi
mov [rdi], ebx
pop rdi
mov [rdi], eax
mov eax, 0
; restore registers
pop rbx
ret;
align 16
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