Add an SH port done by Jean-Yves Avenard of Hewlett-Packard - Embedded

and Personal Systems.  Thanks!
 -Erik

1 files changed, 81 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/sh/crt0.S b/libc/sysdeps/linux/sh/crt0.S
new file mode 100644
index 000000000..7808ffd34
--- /dev/null
+++ b/libc/sysdeps/linux/sh/crt0.S
@@ -0,0 +1,81 @@
+/* Startup code for SH & ELF.
+   Copyright (C) 1999 Free Software Foundation, Inc.
+   Copyright (C) 2001 Hewlett-Packard Australia
+
+   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., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+/* This is the canonical entry point, usually the first thing in the text
+   segment.
+
+	At this entry point, most registers' values are unspecified, except:
+
+   r4		Contains a function pointer to be registered with `atexit'.
+   		This is how the dynamic linker arranges to have DT_FINI
+		functions called for shared libraries that have been loaded
+		before this code runs.
+		WARNING: At that stage only static linker is supported. For
+		uCLinux we won't bother with r4.
+
+   sp		The stack contains the arguments and environment:
+   		0(sp)			argc
+		4(sp)			argv[0]
+		...
+		(4*argc)(sp)		NULL
+		(4*(argc+1))(sp)	envp[0]
+		...
+					NULL
+*/
+
+	.text
+	.globl _start
+	
+_start:
+	/* Clear the frame pointer since this is the outermost frame.  */
+	mov #0, r14
+
+	/* Pop argc off the stack and save a pointer to argv */
+	mov.l @r15+,r4
+	mov r15, r5
+
+	/* set up the value for the environment pointer
+	   r6 = (argc+1)*4+argv
+	*/
+	mov r4,r6
+	add #1,r6
+	shll2 r6
+	add r5,r6
+
+	/* call main */
+	mov.l L_main,r1
+	jsr @r1
+	nop
+
+	/* should never get here....*/
+	mov.l L_abort,r1
+	jsr @r1
+	nop
+
+	.align	2
+
+L_main:
+	.long	__uClibc_main
+
+L_abort:
+	.long	abort
+
+	.data