[PATCH V8 7/8] gdbstub: Add helper function to unregister GDB register space

[Salil Mehta]

Add common function to help unregister the GDB register space. This shall be
done in context to the CPU unrealization.

Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Tested-by: Vishnu Pajjuri <vishnu@os.amperecomputing.com>
Reviewed-by: Gavin Shan <gshan@redhat.com>
Tested-by: Xianglai Li <lixianglai@loongson.cn>
Tested-by: Miguel Luis <miguel.luis@oracle.com>
Reviewed-by: Shaoqin Huang <shahuang@redhat.com>
---
 gdbstub/gdbstub.c      | 12 ++++++++++++
 include/exec/gdbstub.h |  6 ++++++
 2 files changed, 18 insertions(+)

diff --git a/gdbstub/gdbstub.c b/gdbstub/gdbstub.c
index 17efcae0d0..a8449dc309 100644
--- a/gdbstub/gdbstub.c
+++ b/gdbstub/gdbstub.c
@@ -615,6 +615,18 @@ void gdb_register_coprocessor(CPUState *cpu,
     }
 }
 
+void gdb_unregister_coprocessor_all(CPUState *cpu)
+{
+    /*
+     * Safe to nuke everything. GDBRegisterState::xml is static const char so
+     * it won't be freed
+     */
+    g_array_free(cpu->gdb_regs, true);
+
+    cpu->gdb_regs = NULL;
+    cpu->gdb_num_g_regs = 0;
+}
+
 static void gdb_process_breakpoint_remove_all(GDBProcess *p)
 {
     CPUState *cpu = gdb_get_first_cpu_in_process(p);
diff --git a/include/exec/gdbstub.h b/include/exec/gdbstub.h
index eb14b91139..249d4d4bc8 100644
--- a/include/exec/gdbstub.h
+++ b/include/exec/gdbstub.h
@@ -49,6 +49,12 @@ void gdb_register_coprocessor(CPUState *cpu,
                               gdb_get_reg_cb get_reg, gdb_set_reg_cb set_reg,
                               const GDBFeature *feature, int g_pos);
 
+/**
+ * gdb_unregister_coprocessor_all() - unregisters supplemental set of registers
+ * @cpu - the CPU associated with registers
+ */
+void gdb_unregister_coprocessor_all(CPUState *cpu);
+
 /**
  * gdbserver_start: start the gdb server
  * @port_or_device: connection spec for gdb
-- 
2.34.1