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global add_answer
section .text
add_answer_2:
push rbp
mov rbp, rsp
mov rax, 42
add rax, rcx
pop rbp
ret
add_answer:
push rbp
mov rbp, rsp
push r15
mov r15, rsp
push r9
push r8
push rcx
push rdx
push rsi
; "Handle" Win64 calling convention
; push rdi ; used by System V
push rcx ; used by Win64
push 1
mov rdi, rsp
; Make sure that we commit the stack space we are going to use with the
; registers
sub rsp, 24
mov [rdi - 8], byte 42
mov r8, [rdi + 8]
mov r9, [rdi - 8]
mov rcx, r8
add rcx, r9
mov [rdi - 16], rcx
mov eax, [rdi - 16]
mov rsp, r15
pop r15
pop rbp
ret
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