1 files changed, 141 insertions, 0 deletions
diff --git a/backends/loongarch_regs.c b/backends/loongarch_regs.c
new file mode 100644
index 00000000..4a4b2052
--- /dev/null
+++ b/backends/loongarch_regs.c
@@ -0,0 +1,141 @@
+/* Register names and numbers for LoongArch DWARF.
+   Copyright (C) 2023 OpenAnolis community LoongArch SIG.
+   Copyright (C) 2023 Loongson Technology Corporation Limted.
+   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 <string.h>
+#include <dwarf.h>
+
+#define BACKEND loongarch_
+#include "libebl_CPU.h"
+
+ssize_t
+loongarch_register_info (Ebl *ebl, int regno, char *name, size_t namelen,
+		     const char **prefix, const char **setname,
+		     int *bits, int *type)
+{
+  if (name == NULL)
+    return 64;
+
+  *prefix = "";
+
+  if (regno < 32)
+    {
+      *setname = "integer";
+      *type = DW_ATE_signed;
+      *bits = ebl->class == ELFCLASS64 ? 64 : 32;
+    }
+  else
+    {
+      *setname = "FPU";
+      *type = DW_ATE_float;
+      *bits = 64;
+    }
+
+  switch (regno)
+    {
+    case 0:
+      return stpcpy (name, "zero") + 1 - name;
+
+    case 1:
+      *type = DW_ATE_address;
+      return stpcpy (name, "ra") + 1 - name;
+
+    case 2:
+      *type = DW_ATE_address;
+      return stpcpy (name, "tp") + 1 - name;
+
+    case 3:
+      *type = DW_ATE_address;
+      return stpcpy (name, "sp") + 1 - name;
+
+    case 4 ... 11:
+      name[0] = 'a';
+      name[1] = regno - 4 + '0';
+      namelen = 2;
+      break;
+
+    case 12 ... 20:
+      name[0] = 't';
+      name[1] = regno - 12 + '0';
+      namelen = 2;
+      break;
+
+    case 21:
+      return stpcpy (name, "u0") + 1 - name;
+
+    case 22:
+      *type = DW_ATE_address;
+      return stpcpy (name, "fp") + 1 - name;
+
+    case 23 ... 31:
+      name[0] = 's';
+      name[1] = regno - 23 + '0';
+      namelen = 2;
+      break;
+
+    case 32 ... 39:
+      name[0] = 'f';
+      name[1] = 'a';
+      name[2] = regno - 32 + '0';
+      namelen = 3;
+      break;
+
+    case 40 ... 49:
+      name[0] = 'f';
+      name[1] = 't';
+      name[2] = regno - 40 + '0';
+      namelen = 3;
+      break;
+
+    case 50 ... 55:
+      name[0] = 'f';
+      name[1] = 't';
+      name[2] = '1';
+      name[3] = regno - 50 + '0';
+      namelen = 4;
+      break;
+
+    case 56 ... 63:
+      name[0] = 'f';
+      name[1] = 's';
+      name[2] = regno - 56 + '0';
+      namelen = 3;
+      break;
+
+    default:
+      *setname = NULL;
+      return 0;
+    }
+
+  name[namelen++] = '\0';
+  return namelen;
+}