Initial version of the CRIS port.

1 files changed, 49 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/cris/crt0.c b/libc/sysdeps/linux/cris/crt0.c
new file mode 100644
index 000000000..03b0d6ff3
--- /dev/null
+++ b/libc/sysdeps/linux/cris/crt0.c
@@ -0,0 +1,49 @@
+/* $Id: crt0.c,v 1.1 2002/09/16 08:08:33 tobiasa Exp $ */
+
+/* C base for Linux/CRIS 2.0/2.4
+ */
+
+//#define DEBUG
+
+/* The first piece of initialized data.  */
+int __data_start = 0;
+
+/* N.B.: It is important that this be the first function.
+   This file is the first thing in the text section.  */
+
+void
+_start ()
+{
+	/* on the stack we have argc. we can calculate argv/envp
+	 * from that and the succeeding stack location, but fix so
+	 * we get the right calling convention (regs in r10/r11)
+	 *
+	 * to understand this you really ought to read fs/binfmt_elf.c
+	 */
+	__asm__ volatile("pop $r10");
+	__asm__ volatile("move.d $sp, $r11");
+	__asm__ volatile("jump start1");
+}
+
+void __uClibc_main(int argc, char **argv, char **envp)
+         __attribute__ ((__noreturn__));
+
+static void
+start1 (int argc, char **argv)
+{
+	char** environ;
+
+	/* The environment starts just after ARGV.  */
+	environ = &argv[argc + 1];
+	
+	/* If the first thing after ARGV is the arguments
+	   themselves, there is no environment.  */
+	if ((char *) environ == *argv)
+		/* The environment is empty.  Make environ
+		   point at ARGV[ARGC], which is NULL.  */
+		--environ;
+	
+	/* Leave control to the libc */
+
+	__uClibc_main(argc, argv, environ);
+}