binutils: gas: add support for the .skip directive

Signed-off-by: Filip Kokosiński <filip.kokosinski@gmail.com>
fkokosinski · Jun 7, 2024 · f732099 · f732099
1 parent 8947f85
commit f732099
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Showing 4 changed files with 11 additions and 3 deletions.
diff --git a/asm-hello-world/main.S b/asm-hello-world/main.S
@@ -2,7 +2,7 @@
 
 .section .data
 i:
-	.byte 0
+	.skip 1, 0
 ptr:
 	.byte str
 len:

diff --git a/c-print-x/main.c b/c-print-x/main.c
@@ -1,5 +1,9 @@
+/* initialized global var */
 int x = 027;
 
+/* unitialized global var - gcc should emit `.skip` */
+int y;
+
 void _start(void)
 {
 	asm ("law 04000");
@@ -9,6 +13,10 @@ void _start(void)
 	asm ("lio %0" : : "r"(x));
 	asm ("tyo");
 
+	y = 027;
+	asm ("lio %0" : : "r"(y));
+	asm ("tyo");
+
 	asm ("hlt");
 
 	__builtin_unreachable();

diff --git a/pdp1-binutils b/pdp1-binutils
diff --git a/tests/test.exp b/tests/test.exp
@@ -24,7 +24,7 @@ proc run_test { demo_name expected_output } {
 
 run_test "asm-print-x" "x"
 run_test "asm-hello-world" "hello, world"
-run_test "c-print-x" "x"
+run_test "c-print-x" "xx"
 run_test "c-print-struct" "xyz"
 run_test "c-print-array" "xyz"
 run_test "c-print-for-loop" "xxxxyxxx"
-Original file line number
+Diff line change
@@ Expand Up / @@ -2,7 +2,7 @@ @@
     .section .data
     i:
-    	.byte 0
+    	.skip 1, 0
     ptr:
     	.byte str
     len:
@@ Expand Down @@