1 files changed, 69 insertions, 0 deletions
diff --git a/sys.s b/sys.s
new file mode 100644
index 0000000..2a76e09
--- /dev/null
+++ b/sys.s
@@ -0,0 +1,69 @@
+.ifndef __SYS__
+.set __SYS__, 1
+
+.include "syscall.s"
+
+# sys call args:
+#	%rdi
+#	%rsi
+#	%rdx
+#	%rcx
+#	%r8
+#	%r9
+
+.macro __putargs6 arg:req, args:vararg
+	movq \arg, %r9
+.endm
+
+.macro __putargs5 arg:req, args:vararg
+	movq \arg, %r8
+.ifnb \args
+	__putargs6 \args
+.endif
+.endm
+
+.macro __putargs4 arg:req, args:vararg
+	movq \arg, %rcx
+.ifnb \args
+	__putargs5 \args
+.endif
+.endm
+
+.macro __putargs3 arg:req, args:vararg
+	movq \arg, %rdx
+.ifnb \args
+	__putargs4 \args
+.endif
+.endm
+
+.macro __putargs2 arg:req, args:vararg
+	movq \arg, %rsi
+.ifnb \args
+	__putargs3 \args
+.endif
+.endm
+
+.macro __putargs1 arg:req, args:vararg
+	movq \arg, %rdi
+.ifnb \args
+	__putargs2 \args
+.endif
+.endm
+
+.macro sysargs args:vararg
+.ifnb \args
+	__putargs1 \args
+.endif
+.endm
+
+.macro sys func:req, args:vararg
+	sysargs \args
+	movq $__NR_\func, %rax
+	syscall
+.endm
+
+.set STDIN,	0
+.set STDOUT,	1
+.set STDERR,	2
+
+.endif