Bring sh64 support back from the dead.

1 files changed, 86 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/sh64/crt1.S b/libc/sysdeps/linux/sh64/crt1.S
new file mode 100644
index 000000000..271dfbaca
--- /dev/null
+++ b/libc/sysdeps/linux/sh64/crt1.S
@@ -0,0 +1,86 @@
+/* Startup code for SH5 & 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:
+
+   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
+*/
+
+	.file	"crt0.S"
+
+	.globl _start
+	.globl __main
+
+	.type	__uClibc_start_main,@function
+
+	.section .text64,"xa"
+	.align 2	/* 2^2 = 4 */
+
+_start:
+	/* Clear the frame pointer since this is the outermost frame.  */
+###	mov #0, r14	# qqq
+
+	/* Pop argc off the stack and save a pointer to argv */
+	ld.l	r15, 0, r2	/* argc */
+	addi	r15, 4, r3	/* argv */
+
+	/* set up the value for the environment pointer r4 = (argc+1)*4+argv */
+	addi	r2, 1, r4	/* envp = argc + 1 */
+	shlli	r4, 2, r4	/* envp = envp * 4 */
+	add	r3, r4, r4	/* envp = envp + argv */
+
+	/* call main() */
+	movi	__uClibc_start_main,r17
+	ptabs/l	r17,tr0
+	blink	tr0,r18
+
+	/* should never get here....*/
+###	movi	abort@lh,r17
+###	shori	abort@ll,r17
+	ptabs/l	r17,tr0
+	blink	tr0,r63	/* call abort() => (r63) do not come back ... */
+
+	/*
+	 *	The following is a stub to stop the GNU toolchain
+	 *	from calling its C-RTL initialization routines.
+	 */
+__main:
+	ptabs/l	r18,tr0
+	blink	tr0,r63
+
+/* Define a symbol for the first piece of initialized data.  */
+	.data
+	.globl __data_start
+__data_start:
+	.long 0
+	.weak data_start
+	data_start = __data_start
+