From b5731533853fc09966147e0a3f20d8e94a9f9a5b Mon Sep 17 00:00:00 2001
From: Iustin Pop <iusty@k1024.org>
Date: Sun, 12 Feb 2012 11:05:24 +0100
Subject: [PATCH] Add a small assembler program

---
 .gitignore |  1 +
 Makefile   |  7 +++++++
 asm/null.s | 10 ++++++++++
 3 files changed, 18 insertions(+)
 create mode 100644 asm/null.s

diff --git a/.gitignore b/.gitignore
index ab9dcb4..c703ac4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,6 +10,7 @@
 
 /log
 
+/asm/null
 /c/c++-dynamic-null
 /c/c++-static-null
 /c/c-diet-dynamic-null
diff --git a/Makefile b/Makefile
index 3b70f75..e290bf9 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,5 @@
 PROGS = \
+	asm/null \
 	c/c-diet-static-null c/c-diet-dynamic-null \
 	c/c-libc-static-null c/c-libc-dynamic-null \
 	c/c++-static-null c/c++-dynamic-null \
@@ -28,6 +29,11 @@ all: $(PROGS)
 
 $(PROGS): Makefile
 
+asm/null: asm/null.s
+	as -o asm/null.o $<
+	ld -o $@ asm/null.o
+	strip $@
+
 c-diet-static-%: %.c
 	diet gcc -static -O2 -Wall -o $@ $<
 	strip $@
@@ -80,6 +86,7 @@ log: $(PROGS) $(SCRIPTS) Makefile
 .PHONY: log
 
 clean:
+	cd asm && rm *.o
 	cd haskell && rm -f *.hi *.o
 	cd ocaml && rm -f *.cmo *.cmi *.cmx *.o
 	rm -f $(PROGS)
diff --git a/asm/null.s b/asm/null.s
new file mode 100644
index 0000000..09fdd80
--- /dev/null
+++ b/asm/null.s
@@ -0,0 +1,10 @@
+	/* NOTE: this is hard-coded for x86-64; I don't know enough
+	assembly to make this nice and use system headers, etc. */
+	.file "null.s"
+	.text
+	.globl _start
+
+_start:
+        mov     $60, %eax
+	xor	%rdx, %rdx
+	syscall
-- 
2.39.5