From eafb19672c0399033d6f94fbf1fe63a0999d9693 Mon Sep 17 00:00:00 2001
From: Yann Weber <yann.weber@member.fsf.org>
Date: Tue, 21 Aug 2018 07:48:37 +0200
Subject: [PATCH] First commit for asm implementation

---
 wtfstopw.asm | 134 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 134 insertions(+)
 create mode 100644 wtfstopw.asm

diff --git a/wtfstopw.asm b/wtfstopw.asm
new file mode 100644
index 0000000..6655e44
--- /dev/null
+++ b/wtfstopw.asm
@@ -0,0 +1,134 @@
+[bits 64]
+
+section .text
+global _start
+
+_start:
+
+; set stdin non blocking
+mov rax, 72 ; fcntl
+mov rdi, 0 ; stdin
+mov rsi, 3 ; F_GETFL
+mov rdx, 0
+syscall
+mov rdx, rax
+or rdx, 4 ; O_NONBLOCK
+mov rax, 72 ; fcntl
+mov rdi, 0 ; stdin
+mov rsi, 4 ; F_SETFL
+syscall
+
+mov rax, 228 ; clock_gettime
+mov rdi, 0 ; CLOCK_REALTIME
+mov rsi, ts_start
+syscall
+
+
+print_time:
+
+mov rax, 228 ; clock_gettime
+mov rdi, 0 ; CLOCK_REALTIME
+mov rsi, ts_cur
+syscall
+
+mov rax, [tv_cur_s]
+mov rbx, [tv_start_s]
+sub rax, rbx
+fifoo:
+add al, 0x30
+mov byte [msg], al
+;xor rax, rax
+;mov al, byte [msg]
+;mov rdi, [tv_cur_s]
+;mov rdx, [tv_start_s]
+;sub rdi, rdx
+;fifoo:
+;add rax, rdi
+;mov byte [msg], al
+
+mov rax, 1
+mov rdi, 1
+mov rsi, msg
+mov rdx, msglen
+syscall
+
+sleep:
+mov rax, 35
+mov rdi, ts_sleep
+mov rsi, 0
+syscall
+jmp print_time
+
+mov rax, 60            ; sys_exit
+mov rdi, 0             ; 0
+syscall
+
+dumprax:
+	push rax
+	loopdump:
+		push rax
+		mov rbx, rax
+		and rbx, 0x0F
+		cmp bl, 0xA
+		jge hexdigit
+		add bl, 0x30
+		jmp loopcont
+		hexdigit:
+		sub bl, 10
+		add bl, 0x41
+		loopcont:
+dbg:
+		mov byte [digit], bl
+		mov rax, 1
+		mov rdi, 1
+		mov rsi, digit
+		mov rdx, 1
+		syscall
+	pop rax
+	mov rdi, 10
+	xor rdx, rdx
+	mov rsi, rax
+	div rdi
+	cmp rax, 10
+	jge loopdump
+
+	mov al, 10
+	mov al, [digit]
+	mov rax, 1
+	mov rdi, 1
+	mov rsi, nl
+	mov rdx, 1
+	syscall
+
+	pop rax
+ret
+
+section .data
+foobar: ISTRUC timespec
+ts_start:
+	tv_start_s dq 0
+	tv_start_us dq 0
+
+
+msg:	db "0 Hello, world!", 10
+msglen: equ $ - msg
+
+digit: db "0"
+nl: db 10
+
+ts_cur:
+	tv_cur_s dq 0
+	tv_cur_us dq 0
+
+;ts_sleep:
+;	tv_sleep_s dd 0,0
+;	tv_sleep_us dd 10000000,0 
+
+
+; 1/2s sleep
+ts_sleep:
+	tv_sleep_s dq 0
+	tv_sleep_us dq 500000000
+
+
+.end: