1 files changed, 89 insertions, 0 deletions
diff --git a/lib/csu/riscv/crt1.c b/lib/csu/riscv/crt1.c
new file mode 100644
index 0000000..0c3fbe6
--- /dev/null
+++ b/lib/csu/riscv/crt1.c
@@ -0,0 +1,89 @@
+/* LINTLIBRARY */
+/*-
+ * Copyright 1996-1998 John D. Polstra.
+ * Copyright (c) 2015 Ruslan Bukin <br@bsdpad.com>
+ * All rights reserved.
+ *
+ * Portions of this software were developed by SRI International and the
+ * University of Cambridge Computer Laboratory under DARPA/AFRL contract
+ * FA8750-10-C-0237 ("CTSRD"), as part of the DARPA CRASH research programme.
+ *
+ * Portions of this software were developed by the University of Cambridge
+ * Computer Laboratory as part of the CTSRD Project, with support from the
+ * UK Higher Education Innovation Fund (HEIF).
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <stdlib.h>
+
+#include "libc_private.h"
+#include "crtbrand.c"
+#include "ignore_init.c"
+
+typedef void (*fptr)(void);
+
+#ifdef GCRT
+extern void _mcleanup(void);
+extern void monstartup(void *, void *);
+extern int eprol;
+extern int etext;
+#endif
+
+void __start(int argc, char **argv, char **env, void (*cleanup)(void));
+
+/* The entry function. */
+__asm("	.text			\n"
+"	.align 0		\n"
+"	.globl _start		\n"
+"	_start:			\n"
+"	mv	a3, a2		\n" /* cleanup */
+"	addi	a1, a0, 8	\n" /* get argv */
+"	ld	a0, 0(a0)	\n" /* load argc */
+"	slli	t0, a0, 3	\n" /* mult by arg size */
+"	add	a2, a1, t0	\n" /* env is after argv */
+"	addi	a2, a2, 8	\n" /* argv is null terminated */
+"	lla	gp, _gp		\n" /* load global pointer */
+"	call	__start");
+
+void
+__start(int argc, char **argv, char **env, void (*cleanup)(void))
+{
+
+	handle_argv(argc, argv, env);
+
+	if (&_DYNAMIC != NULL)
+		atexit(cleanup);
+	else
+		_init_tls();
+
+#ifdef GCRT
+	atexit(_mcleanup);
+	monstartup(&eprol, &etext);
+__asm__("eprol:");
+#endif
+
+	handle_static_init(argc, argv, env);
+	exit(main(argc, argv, env));
+}