1 files changed, 75 insertions, 0 deletions
diff --git a/backends/riscv_cfi.c b/backends/riscv_cfi.c
new file mode 100644
index 00000000..1a84a382
--- /dev/null
+++ b/backends/riscv_cfi.c
@@ -0,0 +1,75 @@
+/* RISC-V ABI-specified defaults for DWARF CFI.
+   This file is part of elfutils.
+
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
+
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils 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 copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <dwarf.h>
+
+#define BACKEND aarch64_
+#include "libebl_CPU.h"
+
+
+int
+riscv_abi_cfi (Ebl *ebl __attribute__ ((unused)), Dwarf_CIE *abi_info)
+{
+  static const uint8_t abi_cfi[] =
+    {
+      /* The initial Canonical Frame Address is the value of the
+         Stack Pointer (r2) as setup in the previous frame. */
+      DW_CFA_def_cfa, ULEB128_7 (2), ULEB128_7 (0),
+
+      /* The Stack Pointer (r2) is restored from CFA address by default.  */
+      DW_CFA_val_offset, ULEB128_7 (2), ULEB128_7 (0),
+
+#define SV(n) DW_CFA_same_value, ULEB128_7 (n)
+      /* The return address register contains the return address setup by
+	 caller.  */
+      SV (1),
+
+      /* Callee-saved registers s0-s11, fs0-fs11.  */
+      SV(8), SV (9), SV (18), SV (19), SV (20), SV (21),
+      SV (22), SV (23), SV (24), SV (25), SV (26), SV (27),
+
+      SV (40), SV (41),  SV (50),  SV (51), SV (52),  SV (53),
+      SV (54), SV (55),  SV (56),  SV (57), SV (58),  SV (59),
+#undef SV
+
+      /* XXX Note: registers intentionally unused by the program,
+	 for example as a consequence of the procedure call standard
+	 should be initialized as if by DW_CFA_same_value.  */
+    };
+
+  abi_info->initial_instructions = abi_cfi;
+  abi_info->initial_instructions_end = &abi_cfi[sizeof abi_cfi];
+  abi_info->data_alignment_factor = -4;
+
+  abi_info->return_address_register = 1; /* ra.  */
+
+  return 0;
+}