commit 1fe8ac3511fc771376019c6bfe77f317c5e56cd6
author Song Gao <gaosong@loongson.cn> Fri Aug 05 11:35:19 2022 +0800
committer Richard Henderson <richard.henderson@linaro.org> Fri Aug 05 10:02:40 2022 -0700
tree 11b25f90bc015ee0ad35137c8ff3a3aea7c115d0
parent 4cbadc40b99801488bf8d5153d56ae751af15ab9

target/loongarch: Fix GDB get the wrong pc

GDB LoongArch add a register orig_a0, see the base64.xml [1].
We should add the orig_a0 to match the upstream GDB.

[1]: https://github.com/bminor/binutils-gdb/blob/master/gdb/features/loongarch/base64.xml

Signed-off-by: Song Gao <gaosong@loongson.cn>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Acked-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20220805033523.1416837-2-gaosong@loongson.cn>

target/loongarch/gdbstub.c

diff --git a/target/loongarch/gdbstub.c b/target/loongarch/gdbstub.c
index 24e126f..5feb434 100644
--- a/target/loongarch/gdbstub.c
+++ b/target/loongarch/gdbstub.c
@@ -19,8 +19,11 @@
     if (0 <= n && n < 32) {
         return gdb_get_regl(mem_buf, env->gpr[n]);
     } else if (n == 32) {
-        return gdb_get_regl(mem_buf, env->pc);
+        /* orig_a0 */
+        return gdb_get_regl(mem_buf, 0);
     } else if (n == 33) {
+        return gdb_get_regl(mem_buf, env->pc);
+    } else if (n == 34) {
         return gdb_get_regl(mem_buf, env->CSR_BADV);
     }
     return 0;
@@ -36,7 +39,7 @@
     if (0 <= n && n < 32) {
         env->gpr[n] = tmp;
         length = sizeof(target_ulong);
-    } else if (n == 32) {
+    } else if (n == 33) {
         env->pc = tmp;
         length = sizeof(target_ulong);
     }