[RFC PATCH 08/19] riscv: Add (empty) ifunc framework

[Christoph Muellner <christoph.muellner@vrull.eu>]

From: Christoph Müllner <christoph.muellner@vrull.eu>

This patch adds the missing pieces to add ifunc implementations
of routines. No optimized code is added as part of this patch.

Signed-off-by: Christoph Müllner <christoph.muellner@vrull.eu>
---
 sysdeps/riscv/multiarch/Makefile          |  4 +++
 sysdeps/riscv/multiarch/ifunc-impl-list.c | 39 +++++++++++++++++++++++
 sysdeps/riscv/multiarch/init-arch.h       | 24 ++++++++++++++
 3 files changed, 67 insertions(+)
 create mode 100644 sysdeps/riscv/multiarch/Makefile
 create mode 100644 sysdeps/riscv/multiarch/ifunc-impl-list.c
 create mode 100644 sysdeps/riscv/multiarch/init-arch.h

diff --git a/sysdeps/riscv/multiarch/Makefile b/sysdeps/riscv/multiarch/Makefile
new file mode 100644
index 0000000000..68d3f5192f
--- /dev/null
+++ b/sysdeps/riscv/multiarch/Makefile
@@ -0,0 +1,4 @@
+ifeq ($(subdir),string)
+sysdep_routines += \
+
+endif
diff --git a/sysdeps/riscv/multiarch/ifunc-impl-list.c b/sysdeps/riscv/multiarch/ifunc-impl-list.c
new file mode 100644
index 0000000000..c0cdca45fd
--- /dev/null
+++ b/sysdeps/riscv/multiarch/ifunc-impl-list.c
@@ -0,0 +1,39 @@
+/* Enumerate available IFUNC implementations of a function.  RISC-V version.
+   Copyright (C) 2022 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 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.
+
+   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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <assert.h>
+#include <string.h>
+#include <wchar.h>
+#include <ldsodefs.h>
+#include <ifunc-impl-list.h>
+#include <init-arch.h>
+#include <stdio.h>
+
+/* Maximum number of IFUNC implementations.  */
+#define MAX_IFUNC	7
+
+size_t
+__libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
+			size_t max)
+{
+  assert (max >= MAX_IFUNC);
+
+  size_t i = 0;
+
+  return i;
+}
diff --git a/sysdeps/riscv/multiarch/init-arch.h b/sysdeps/riscv/multiarch/init-arch.h
new file mode 100644
index 0000000000..c9afeec07b
--- /dev/null
+++ b/sysdeps/riscv/multiarch/init-arch.h
@@ -0,0 +1,24 @@
+/* Define INIT_ARCH for RISC-V.
+   This file is part of the GNU C Library.
+   Copyright (C) 2022 Free Software Foundation, Inc.
+
+   The GNU C Library 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.
+
+   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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#ifndef _INIT_ARCH_RISCV
+#define _INIT_ARCH_RISCV
+
+#define INIT_ARCH()
+
+#endif /* _INIT_ARCH_RISCV  */
-- 
2.39.1