gdb: LoongArch: Add initial baremetal support

This commit adds initial baremetal support for LoongArch.

Signed-off-by: Zhensong Liu <liuzhensong@loongson.cn>
Signed-off-by: Qing zhang <zhangqing@loongson.cn>
Signed-off-by: Youling Tang <tangyouling@loongson.cn>
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>

1 files changed, 49 insertions, 0 deletions

diff --git a/gdb/loongarch-tdep.h b/gdb/loongarch-tdep.h
new file mode 100644
index 0000000..b2fd16e
--- /dev/null
+++ b/gdb/loongarch-tdep.h
@@ -0,0 +1,49 @@
+/* Target-dependent header for the LoongArch architecture, for GDB.
+
+   Copyright (C) 2022 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   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 LOONGARCH_TDEP_H
+#define LOONGARCH_TDEP_H
+
+#include "gdbarch.h"
+#include "arch/loongarch.h"
+#include "regset.h"
+
+#include "elf/loongarch.h"
+#include "opcode/loongarch.h"
+
+/* Register set definitions.  */
+extern const struct regset loongarch_gregset;
+
+/* Target-dependent structure in gdbarch.  */
+struct loongarch_gdbarch_tdep : gdbarch_tdep
+{
+  /* Features about the abi that impact how the gdbarch is configured.  */
+  struct loongarch_gdbarch_features abi_features;
+
+  struct
+  {
+    int r;	/* General register. */
+    int ra;	/* Return Address.  */
+    int sp;	/* Stack Pointer.  */
+    int pc;	/* Program Counter.  */
+    int badv;	/* Bad vaddr for addressing exception.  */
+  } regs;	/* LoongArch registers  */
+};
+
+#endif /* LOONGARCH_TDEP_H  */