Pete Popov writes:

Hi Erik,

I'm not sure why the NIOS support is not in uClibc -- perhaps the patch
was rejected or never submitted? In any case, I'm playing with some NIOS
stuff and created this patch against 0.9.26. The work was done by
Microtronix. I'm not sure who else contributed to it. It would be great
to have the NIOS support available in uClibc so developers don't have to
go searching for these bits.

Pete

1 files changed, 73 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/nios/crt0.c b/libc/sysdeps/linux/nios/crt0.c
new file mode 100644
index 000000000..48b1a0f07
--- /dev/null
+++ b/libc/sysdeps/linux/nios/crt0.c
@@ -0,0 +1,73 @@
+/* Copyright (C) 1991, 1992 Free Software Foundation, Inc.
+
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <asm/ptrace.h>
+
+#define nop() __asm__ __volatile__ ("nop")
+
+extern inline int _stack_frame_address(void)
+{
+	int retval;
+	__asm__ __volatile__(
+		"mov	%0, %%fp\n\t"
+		: "=r" (retval) );
+	return retval;
+}
+
+void __uClibc_main(int argc,void *argv,void *envp);
+
+void _start(void)
+{
+	void **p;
+
+	nop();				/* placeholder for breakpoint */
+	nop();
+
+	p =  (int *) (_stack_frame_address() + REGWIN_SZ);
+	__uClibc_main( (int) *p, *(p+1), *(p+2) );
+
+/* If that didn't kill us, ... */
+
+	asm("trap 0");
+}
+
+/*
+ *	this was needed for gcc/g++-builds,  atexit was not getting included
+ *	for some stupid reason,  this gets us a compiler
+ */
+// empty_func:
+// //	rts
+// 	.weak atexit
+// atexit = empty_func
+// 
+// /*
+//  *	a little bit of stuff to support C++
+//  */
+// 	.section .ctors,"aw"
+// 	.align 4
+// 	.global __CTOR_LIST__
+// __CTOR_LIST__:
+// 	.long -1
+// 
+// 	.section .dtors,"aw"
+// 	.align 4
+// 	.global __DTOR_LIST__
+// __DTOR_LIST__:
+// 	.long -1
+