gdbstub: Implement continue (c pkt) with new infra

Signed-off-by: Jon Doron <arilou@gmail.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20190529064148.19856-5-arilou@gmail.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>

gdbstub.c

@@ -1535,6 +1535,16 @@ static void handle_thread_alive(GdbCmdContext *gdb_ctx, void *user_ctx)
     put_packet(gdb_ctx->s, "OK");
 }
 
+static void handle_continue(GdbCmdContext *gdb_ctx, void *user_ctx)
+{
+    if (gdb_ctx->num_params) {
+        gdb_set_cpu_pc(gdb_ctx->s, gdb_ctx->params[0].val_ull);
+    }
+
+    gdb_ctx->s->signal = 0;
+    gdb_continue(gdb_ctx->s);
+}
+
 static int gdb_handle_packet(GDBState *s, const char *line_buf)
 {
     CPUState *cpu;
@@ -1571,13 +1581,16 @@ static int gdb_handle_packet(GDBState *s, const char *line_buf)
         gdb_breakpoint_remove_all();
         break;
     case 'c':
-        if (*p != '\0') {
-            addr = strtoull(p, (char **)&p, 16);
-            gdb_set_cpu_pc(s, addr);
+        {
+            static const GdbCmdParseEntry continue_cmd_desc = {
+                .handler = handle_continue,
+                .cmd = "c",
+                .cmd_startswith = 1,
+                .schema = "L0"
+            };
+            cmd_parser = &continue_cmd_desc;
         }
-        s->signal = 0;
-        gdb_continue(s);
-        return RS_IDLE;
+        break;
     case 'C':
         s->signal = gdb_signal_to_target (strtoul(p, (char **)&p, 16));
         if (s->signal == -1)