[ramdisk] add cvitek pre-built ramdisk

Change-Id: Ic7d2046a23358129eaf621b5558984a64fa7361d

ramdisk/initramfs/glibc_riscv64/usr/include/asm-generic/signal-defs.h

@@ -0,0 +1,29 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef __ASM_GENERIC_SIGNAL_DEFS_H
+#define __ASM_GENERIC_SIGNAL_DEFS_H
+
+
+
+#ifndef SIG_BLOCK
+#define SIG_BLOCK          0	/* for blocking signals */
+#endif
+#ifndef SIG_UNBLOCK
+#define SIG_UNBLOCK        1	/* for unblocking signals */
+#endif
+#ifndef SIG_SETMASK
+#define SIG_SETMASK        2	/* for setting the signal mask */
+#endif
+
+#ifndef __ASSEMBLY__
+typedef void __signalfn_t(int);
+typedef __signalfn_t *__sighandler_t;
+
+typedef void __restorefn_t(void);
+typedef __restorefn_t *__sigrestore_t;
+
+#define SIG_DFL	((__sighandler_t)0)	/* default signal handling */
+#define SIG_IGN	((__sighandler_t)1)	/* ignore signal */
+#define SIG_ERR	((__sighandler_t)-1)	/* error return from signal */
+#endif
+
+#endif /* __ASM_GENERIC_SIGNAL_DEFS_H */