RISC-V: ELF and module implementation

This patch contains the code that interfaces with ELF objects on RISC-V
systems, the vast majority of which is present to load kernel modules.

Signed-off-by: Palmer Dabbelt <palmer@dabbelt.com>

arch/riscv/include/asm/compat.h

@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2012 ARM Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef __ASM_COMPAT_H
+#define __ASM_COMPAT_H
+#ifdef CONFIG_COMPAT
+
+#if defined(CONFIG_64BIT)
+#define COMPAT_UTS_MACHINE "riscv64\0\0"
+#elif defined(CONFIG_32BIT)
+#define COMPAT_UTS_MACHINE "riscv32\0\0"
+#else
+#error "Unknown RISC-V base ISA"
+#endif
+
+#endif /*CONFIG_COMPAT*/
+#endif /*__ASM_COMPAT_H*/