scc

commit d2262468e06da67413347597c9f15469e945f1be
parent 642bd886398e144a79c311d31c9ce7381e675f10
Author: Roberto E. Vargas Caballero <k0ga@shike2.com>
Date:   Sat, 16 Dec 2017 21:27:04 +0100

[as] Add end pseudo instruction

This pseudo instruction finishes the processing of the current
file. It allows to add free format comments after it.

Diffstat:
M
as/as.h
 | 
1
+
M
as/ins.c
 | 
6
++++++
M
as/main.c
 | 
4
+++-
M
as/target/x80/x80.dat
 | 
1
+

4 files changed, 11 insertions(+), 1 deletion(-)
diff --git a/as/as.h b/as/as.h
@@ -195,3 +195,4 @@ extern TUINT maxaddr;
 extern int endian;
 extern Symbol *linesym, *symlist;
 extern char *infile;
+extern int endpass;
diff --git a/as/ins.c b/as/ins.c
@@ -235,3 +235,9 @@ align(Op *op, Node **args)
 	for (al = pc - curpc; al > 0; --al)
 		emit((char []) {0}, 1);
 }
+
+void
+end(Op *op, Node **args)
+{
+	endpass = 1;
+}
diff --git a/as/main.c b/as/main.c
@@ -12,6 +12,7 @@ static char sccsid[] = "@(#) ./as/main.c";
 
 char *argv0;
 char *outfile, *infile;
+int endpass;
 
 
 static void
@@ -77,8 +78,9 @@ dopass(char *fname)
 		die("as: error opening '%s'", fname);
 	cleansecs();
 
+	endpass = 0;
 	setjmp(recover);
-	while (nextline(fp, &line)) {
+	while (!endpass && nextline(fp, &line)) {
 		linesym = NULL;
 
 		if (line.label)
diff --git a/as/target/x80/x80.dat b/as/target/x80/x80.dat
@@ -31,6 +31,7 @@
 .STRING	string+	0	none	string	Z80,R800,GB80
 .ASCII	string+	0	none	ascii	Z80,R800,GB80
 .ALIGN	imm16+	0	none	align	Z80,R800,GB80
+.END	none	0	none	end	Z80,R800,GB80
 
 NOP	none	1	0x00	noargs	Z80,R800,GB80
 EI	none	1	0xfb	noargs	Z80,R800,GB80