tools/emul/shell: copy user.h in its cfsin

This way, we can compile apps from within the shell that run on the
shell.

tools/emul/.gitignore

@@ -3,3 +3,4 @@
 /runbin/runbin
 /*/*-bin.h
 /cfsin/zasm
+/cfsin/user.h

tools/emul/Makefile

@@ -5,9 +5,10 @@ APPS = ../../apps
 ZASMBIN = zasm/zasm
 ZASMSH = ../zasm.sh
 SHELLAPPS = $(addprefix cfsin/, zasm)
+CFSIN_CONTENTS = $(SHELLAPPS) cfsin/user.h
 
 .PHONY: all
-all: $(TARGETS) $(SHELLAPPS)
+all: $(TARGETS) $(CFSIN_CONTENTS)
 
 shell/kernel-bin.h: shell/shell_.asm $(ZASMBIN)
 	$(ZASMSH) $(KERNEL) < $< | ./bin2c.sh KERNEL | tee $@ > /dev/null
@@ -34,6 +35,9 @@ $(CFSPACK):
 $(SHELLAPPS): $(ZASMBIN)
 	$(ZASMSH) $(KERNEL) $(APPS) shell/user.h < $(APPS)/$(notdir $@)/glue.asm > $@
 
+cfsin/user.h: shell/user.h
+	cp $< $@
+
 .PHONY: updatebootstrap
 updatebootstrap: $(ZASMBIN) $(INCCFS)
 	$(ZASMSH) $(KERNEL) < zasm/glue.asm > zasm/kernel.bin

tools/emul/cfsin/hello.asm

@@ -0,0 +1,12 @@
+.equ	printstr	0x3c
+
+.org	0x9000
+
+	ld	hl, sAwesome
+	call	printstr
+	xor	a		; success
+	ret
+
+sAwesome:
+	.db	"Assembled from the shell", 0x0d, 0x0a, 0
+