binutils/riscv: Register names in DWARF output

Adds a register name table for RiscV so that objdump and readelf can
both use better register names.

binutils/ChangeLog:

	* dwarf.c (dwarf_regnames_riscv): New register name table.
	(init_dwarf_regnames_riscv): New function.
	(init_dwarf_regnames): Add call to initialise RiscV register
	names.
	* dwarf.h (init_dwarf_regnames_riscv): Declare.
	* objdump.c (dump_dwarf): Add call to initialise RiscV register
	names.

1 files changed, 4 insertions, 0 deletions

diff --git a/binutils/objdump.c b/binutils/objdump.c
index d8dca90f40c..37a9f0d2e16 100644
--- a/binutils/objdump.c
+++ b/binutils/objdump.c
@@ -2732,6 +2732,10 @@ dump_dwarf (bfd *abfd)
       init_dwarf_regnames_s390 ();
       break;
 
+    case bfd_arch_riscv:
+      init_dwarf_regnames_riscv ();
+      break;
+
     default:
       break;
     }