minidumpserver.py:support gdb can set register

Signed-off-by: anjiahao <anjiahao@xiaomi.com>

tools/minidumpserver.py

@@ -567,9 +567,18 @@ class GDBStub:
 
     def handle_register_single_write_packet(self, pkt):
         # the 'P' packet for writing to registers
-        #
-        # We don't support writing so return error
-        self.put_gdb_packet(b"E01")
+
+        index, value = pkt[1:].split(b"=")
+        reg_val = 0
+        for i in range(0, len(value), 2):
+            data = value[i : i + 2]
+            reg_val = reg_val + (int("0x" + data.decode("utf8"), 16) << (i * 4))
+
+        reg = int("0x" + index.decode("utf8"), 16)
+        if reg < len(self.logfile.registers):
+            self.logfile.registers[reg] = reg_val
+
+        self.put_gdb_packet(b"OK")
 
     def handle_memory_read_packet(self, pkt):
         # the 'm' packet for reading memory: m<addr>,<len>