selftests/nolibc: support two errnos with EXPECT_SYSER2()

Some functions may be implemented with different syscalls in different
platforms, these syscalls may set different errnos for the same
arguments, let's support such cases.
Suggested-by: Willy Tarreau <w@1wt.eu>
Link: https://lore.kernel.org/linux-riscv/20230528113325.GJ1956@1wt.eu/Signed-off-by: Zhangjin Wu <falcon@tinylab.org>
Reviewed-by: Thomas Weißschuh <linux@weissschuh.net>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

tools/testing/selftests/nolibc/nolibc-test.c

@@ -300,18 +300,24 @@ static int expect_sysne(int expr, int llen, int val)
 }
 
 
+#define EXPECT_SYSER2(cond, expr, expret, experr1, experr2)		\
+	do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_syserr2(expr, expret, experr1, experr2, llen); } while (0)
+
 #define EXPECT_SYSER(cond, expr, expret, experr)			\
-	do { if (!cond) pad_spc(llen, 64, "[SKIPPED]\n"); else ret += expect_syserr(expr, expret, experr, llen); } while (0)
+	EXPECT_SYSER2(cond, expr, expret, experr, 0)
 
-static int expect_syserr(int expr, int expret, int experr, int llen)
+static int expect_syserr2(int expr, int expret, int experr1, int experr2, int llen)
 {
 	int ret = 0;
 	int _errno = errno;
 
 	llen += printf(" = %d %s ", expr, errorname(_errno));
-	if (expr != expret || _errno != experr) {
+	if (expr != expret || (_errno != experr1 && _errno != experr2)) {
 		ret = 1;
-		llen += printf(" != (%d %s) ", expret, errorname(experr));
+		if (experr2 == 0)
+			llen += printf(" != (%d %s) ", expret, errorname(experr1));
+		else
+			llen += printf(" != (%d %s %s) ", expret, errorname(experr1), errorname(experr2));
 		llen += pad_spc(llen, 64, "[FAIL]\n");
 	} else {
 		llen += pad_spc(llen, 64, " [OK]\n");