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|
format ELF64 executable 3
SYS_exit = 60
SYS_write = 1
STDOUT = 1
macro mov64 dest, src {
mov rax, src
mov dest, rax
}
macro def64 name, value {
name:
dq value
}
macro push8 value {
sub rsp, 1
mov [rsp], value
}
macro push16 value {
mov ax, value
push ax
}
macro push32 value {
mov eax, value
push eax
}
macro push64 value {
mov rax, value
push rax
}
macro funBegin name {
name#^var_size = 0
}
macro funDefVar name, var_name, size {
name#^var_size = name#^var_size + size
name#^#var_name#^pos = name#^var_size
}
macro funEntry name {
name:
if name#^var_size <> 0
push rbp
mov rbp, rsp
sub rsp, name#^var_size
end if
}
macro funEnd name {
if name#^var_size <> 0
add rsp, name#^var_size
pop rbp
end if
ret
}
macro funCallBegin id {
n^#id#^param_size = 0
}
macro funCallParam id, value, size {
push#size value
n^#id#^param_size = n^#id#^param_size + size
}
macro funCall id, name {
call name
if n^#id#^param_size <> 0
add rsp, n^#id#^param_size
end if
}
segment readable executable
entry _start
; rdi = the number
print_u64:
mov rax,rdi
mov rcx, rsp
mov rbx, 10
.L:
xor rdx, rdx
div rbx
add edx, '0'
dec rcx
mov [rcx],dl
cmp rax, 0
jnz .L
mov rax, SYS_write
mov rdi, STDOUT
mov rsi, rcx
mov rdx, rsp
sub rdx, rcx
syscall
ret
_start:
call main
mov rax, SYS_exit
xor rdi,rdi
syscall
|
