Import gcrypt public-key cryptography and implement signature checking.

grub-core/lib/libgcrypt/mpi/sparc32/udiv.S

@@ -0,0 +1,195 @@
+/* SPARC v7 __udiv_qrnnd division support, used from longlong.h.
+ *           This is for v7 CPUs without a floating-point unit.
+ *
+ *      Copyright (C) 1993, 1994, 1996, 1998,
+ *                    2001, 2002 Free Software Foundation, Inc.
+ *       
+ * This file is part of Libgcrypt.
+ *
+ * Libgcrypt is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * Libgcrypt 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ *
+ * Note: This code is heavily based on the GNU MP Library.
+ *	 Actually it's the same code with only minor changes in the
+ *	 way the data is stored; this is to support the abstraction
+ *	 of an optional secure memory allocation which may be used
+ *	 to avoid revealing of sensitive data due to paging etc.
+ */
+
+
+! INPUT PARAMETERS
+! rem_ptr	o0
+! n1		o1
+! n0		o2
+! d		o3
+
+#include "sysdep.h"
+
+	.text
+	.align 4
+	.global C_SYMBOL_NAME(__udiv_qrnnd)
+C_SYMBOL_NAME(__udiv_qrnnd):
+	tst	%o3
+	bneg	Largedivisor
+	mov	8,%g1
+
+	b	Lp1
+	addxcc	%o2,%o2,%o2
+
+Lplop:	bcc	Ln1
+	addxcc	%o2,%o2,%o2
+Lp1:	addx	%o1,%o1,%o1
+	subcc	%o1,%o3,%o4
+	bcc	Ln2
+	addxcc	%o2,%o2,%o2
+Lp2:	addx	%o1,%o1,%o1
+	subcc	%o1,%o3,%o4
+	bcc	Ln3
+	addxcc	%o2,%o2,%o2
+Lp3:	addx	%o1,%o1,%o1
+	subcc	%o1,%o3,%o4
+	bcc	Ln4
+	addxcc	%o2,%o2,%o2
+Lp4:	addx	%o1,%o1,%o1
+	addcc	%g1,-1,%g1
+	bne	Lplop
+	subcc	%o1,%o3,%o4
+	bcc	Ln5
+	addxcc	%o2,%o2,%o2
+Lp5:	st	%o1,[%o0]
+	retl
+	xnor	%g0,%o2,%o0
+
+Lnlop:	bcc	Lp1
+	addxcc	%o2,%o2,%o2
+Ln1:	addx	%o4,%o4,%o4
+	subcc	%o4,%o3,%o1
+	bcc	Lp2
+	addxcc	%o2,%o2,%o2
+Ln2:	addx	%o4,%o4,%o4
+	subcc	%o4,%o3,%o1
+	bcc	Lp3
+	addxcc	%o2,%o2,%o2
+Ln3:	addx	%o4,%o4,%o4
+	subcc	%o4,%o3,%o1
+	bcc	Lp4
+	addxcc	%o2,%o2,%o2
+Ln4:	addx	%o4,%o4,%o4
+	addcc	%g1,-1,%g1
+	bne	Lnlop
+	subcc	%o4,%o3,%o1
+	bcc	Lp5
+	addxcc	%o2,%o2,%o2
+Ln5:	st	%o4,[%o0]
+	retl
+	xnor	%g0,%o2,%o0
+
+Largedivisor:
+	and	%o2,1,%o5	! %o5 = n0 & 1
+
+	srl	%o2,1,%o2
+	sll	%o1,31,%g2
+	or	%g2,%o2,%o2	! %o2 = lo(n1n0 >> 1)
+	srl	%o1,1,%o1	! %o1 = hi(n1n0 >> 1)
+
+	and	%o3,1,%g2
+	srl	%o3,1,%g3	! %g3 = floor(d / 2)
+	add	%g3,%g2,%g3	! %g3 = ceil(d / 2)
+
+	b	LLp1
+	addxcc	%o2,%o2,%o2
+
+LLplop: bcc	LLn1
+	addxcc	%o2,%o2,%o2
+LLp1:	addx	%o1,%o1,%o1
+	subcc	%o1,%g3,%o4
+	bcc	LLn2
+	addxcc	%o2,%o2,%o2
+LLp2:	addx	%o1,%o1,%o1
+	subcc	%o1,%g3,%o4
+	bcc	LLn3
+	addxcc	%o2,%o2,%o2
+LLp3:	addx	%o1,%o1,%o1
+	subcc	%o1,%g3,%o4
+	bcc	LLn4
+	addxcc	%o2,%o2,%o2
+LLp4:	addx	%o1,%o1,%o1
+	addcc	%g1,-1,%g1
+	bne	LLplop
+	subcc	%o1,%g3,%o4
+	bcc	LLn5
+	addxcc	%o2,%o2,%o2
+LLp5:	add	%o1,%o1,%o1	! << 1
+	tst	%g2
+	bne	Oddp
+	add	%o5,%o1,%o1
+	st	%o1,[%o0]
+	retl
+	xnor	%g0,%o2,%o0
+
+LLnlop: bcc	LLp1
+	addxcc	%o2,%o2,%o2
+LLn1:	addx	%o4,%o4,%o4
+	subcc	%o4,%g3,%o1
+	bcc	LLp2
+	addxcc	%o2,%o2,%o2
+LLn2:	addx	%o4,%o4,%o4
+	subcc	%o4,%g3,%o1
+	bcc	LLp3
+	addxcc	%o2,%o2,%o2
+LLn3:	addx	%o4,%o4,%o4
+	subcc	%o4,%g3,%o1
+	bcc	LLp4
+	addxcc	%o2,%o2,%o2
+LLn4:	addx	%o4,%o4,%o4
+	addcc	%g1,-1,%g1
+	bne	LLnlop
+	subcc	%o4,%g3,%o1
+	bcc	LLp5
+	addxcc	%o2,%o2,%o2
+LLn5:	add	%o4,%o4,%o4	! << 1
+	tst	%g2
+	bne	Oddn
+	add	%o5,%o4,%o4
+	st	%o4,[%o0]
+	retl
+	xnor	%g0,%o2,%o0
+
+Oddp:	xnor	%g0,%o2,%o2
+	! q' in %o2. r' in %o1
+	addcc	%o1,%o2,%o1
+	bcc	LLp6
+	addx	%o2,0,%o2
+	sub	%o1,%o3,%o1
+LLp6:	subcc	%o1,%o3,%g0
+	bcs	LLp7
+	subx	%o2,-1,%o2
+	sub	%o1,%o3,%o1
+LLp7:	st	%o1,[%o0]
+	retl
+	mov	%o2,%o0
+
+Oddn:	xnor	%g0,%o2,%o2
+	! q' in %o2. r' in %o4
+	addcc	%o4,%o2,%o4
+	bcc	LLn6
+	addx	%o2,0,%o2
+	sub	%o4,%o3,%o4
+LLn6:	subcc	%o4,%o3,%g0
+	bcs	LLn7
+	subx	%o2,-1,%o2
+	sub	%o4,%o3,%o4
+LLn7:	st	%o4,[%o0]
+	retl
+	mov	%o2,%o0