Patch from Paul Mundt adding uClibc sh64 support:

Here's a patch that implements the beginnings of a rudimentary sh64 port. So
far, this only works static, as I haven't done any of the ldso work yet. I've
also not touched the libpthread stuff yet either, so that's also disabled for
now.

This port was based off of some work that Sean McGoogan at SuperH did for his
initial port, but the this patch doesn't carry over too much from there
(basically the libc/sysdeps/linux/sh64/Makefile (or rather, parts of it),
the setjmp/longjmp stuff (which I had to rewrite portions of it to work with
the new toolchains), etc.).

However, for static, everything appears to work correcly, at least in a hello
world type application.

1 files changed, 140 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/sh64/setjmp.S b/libc/sysdeps/linux/sh64/setjmp.S
new file mode 100644
index 000000000..11d76d372
--- /dev/null
+++ b/libc/sysdeps/linux/sh64/setjmp.S
@@ -0,0 +1,140 @@
+/* setjmp for SH-5.
+   Copyright (C) 2001 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., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+
+#define _SETJMP_H
+#define _ASM
+#include <bits/setjmp.h>
+
+
+#define	INTEGER(reg,offset)	st.q	r2, offset*8, reg
+#define	DOUBLE(reg,offset)	fst.d	r2, offset*8, reg
+
+
+	.file	"setjmp.S"
+
+	.section .text64,"xa"
+	.align 2
+
+	.global	__sigsetjmp	
+	.type	__sigsetjmp,@function
+
+__sigsetjmp:
+	/*
+	 *	extern int __sigsetjmp(jmp_buf env, int savemask);
+	 *
+	 *	r2 == env
+	 *	r3 == savemask
+	 *	r4 == temporary
+	 */
+
+			/* callee-save registers R10-R16 */
+	INTEGER(r10, __SETJMP_INT(0))
+	INTEGER(r11, __SETJMP_INT(1))
+	INTEGER(r12, __SETJMP_INT(2))
+	INTEGER(r13, __SETJMP_INT(3))
+	INTEGER(r14, __SETJMP_INT(4))
+	INTEGER(r15, __SETJMP_INT(5))
+	INTEGER(r16, __SETJMP_INT(6))
+
+			/* callee-save registers R28-R35 */
+	INTEGER(r28, __SETJMP_INT(7))
+	INTEGER(r29, __SETJMP_INT(8))
+	INTEGER(r30, __SETJMP_INT(9))
+	INTEGER(r31, __SETJMP_INT(10))
+	INTEGER(r32, __SETJMP_INT(11))
+	INTEGER(r33, __SETJMP_INT(12))
+	INTEGER(r34, __SETJMP_INT(13))
+	INTEGER(r35, __SETJMP_INT(14))
+
+			/* callee-save registers R44-R59 */
+	INTEGER(r44, __SETJMP_INT(15))
+	INTEGER(r45, __SETJMP_INT(16))
+	INTEGER(r46, __SETJMP_INT(17))
+	INTEGER(r47, __SETJMP_INT(18))
+	INTEGER(r48, __SETJMP_INT(19))
+	INTEGER(r49, __SETJMP_INT(20))
+	INTEGER(r50, __SETJMP_INT(21))
+	INTEGER(r51, __SETJMP_INT(22))
+	INTEGER(r52, __SETJMP_INT(23))
+	INTEGER(r53, __SETJMP_INT(24))
+	INTEGER(r54, __SETJMP_INT(25))
+	INTEGER(r55, __SETJMP_INT(26))
+	INTEGER(r56, __SETJMP_INT(27))
+	INTEGER(r57, __SETJMP_INT(28))
+	INTEGER(r58, __SETJMP_INT(29))
+	INTEGER(r59, __SETJMP_INT(30))
+
+	#if __SETJMP_NUM_INT != 31
+	#error	__SETJMP_NUM_INT does agree with expected value
+	#endif
+
+#if __SETJMP_NUM_DBL > 0
+			/* callee-save registers FR12-FR15 */
+	DOUBLE(d12, __SETJMP_DBL(0))
+	DOUBLE(d14, __SETJMP_DBL(1))
+
+			/* callee-save registers FR36-FR63 */
+	DOUBLE(d36, __SETJMP_DBL(2))
+	DOUBLE(d38, __SETJMP_DBL(3))
+	DOUBLE(d40, __SETJMP_DBL(4))
+	DOUBLE(d42, __SETJMP_DBL(5))
+	DOUBLE(d44, __SETJMP_DBL(6))
+	DOUBLE(d46, __SETJMP_DBL(7))
+	DOUBLE(d48, __SETJMP_DBL(8))
+	DOUBLE(d50, __SETJMP_DBL(9))
+	DOUBLE(d52, __SETJMP_DBL(10))
+	DOUBLE(d54, __SETJMP_DBL(11))
+	DOUBLE(d56, __SETJMP_DBL(12))
+	DOUBLE(d58, __SETJMP_DBL(13))
+	DOUBLE(d60, __SETJMP_DBL(14))
+	DOUBLE(d62, __SETJMP_DBL(15))
+
+	#if __SETJMP_NUM_DBL != 16
+	#error	__SETJMP_NUM_DBL does agree with expected value
+	#endif
+
+#endif	/* __SETJMP_NUM_DBL > 0 */
+
+			/* callee-save registers TR5-TR7 */
+	gettr   tr5, r4
+	INTEGER(r4, __SETJMP_TRG(0))
+	gettr   tr6, r4
+	INTEGER(r4, __SETJMP_TRG(1))
+	gettr   tr7, r4
+	INTEGER(r4, __SETJMP_TRG(2))
+
+	#if __SETJMP_NUM_TRG != 3
+	#error	__SETJMP_NUM_TRG does agree with expected value
+	#endif
+
+			/* save Linkage Register (LR) for longjmp return */
+	INTEGER(r18, __SETJMP_LR)
+
+			/*
+			 *	return a value of zero if call is __sigsetjmp().
+			 *	This is so that caller of setjmp() knows
+			 *	we have retruned via setjmp, and not via longjmp.
+			 *	R0 is the result register.
+			 */
+
+	ptabs/l	r18, tr0	/* return to caller */
+	movi	0, r2	/* return value */
+	blink	tr0, r63
+