gdbstub: specialise target_memory_rw_debug

The two implementations are different enough to encourage having a
specialisation and we can move some of the softmmu only stuff out of
gdbstub.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20230302190846.2593720-16-alex.bennee@linaro.org>
Message-Id: <20230303025805.625589-16-richard.henderson@linaro.org>

1 files changed, 51 insertions, 0 deletions

diff --git a/gdbstub/softmmu.c b/gdbstub/softmmu.c
index 7c180b779a..ab2d182654 100644
--- a/gdbstub/softmmu.c
+++ b/gdbstub/softmmu.c
@@ -414,8 +414,59 @@ void gdb_exit(int code)
 }
 
 /*
+ * Memory access
+ */
+static int phy_memory_mode;
+
+int gdb_target_memory_rw_debug(CPUState *cpu, hwaddr addr,
+                               uint8_t *buf, int len, bool is_write)
+{
+    CPUClass *cc;
+
+    if (phy_memory_mode) {
+        if (is_write) {
+            cpu_physical_memory_write(addr, buf, len);
+        } else {
+            cpu_physical_memory_read(addr, buf, len);
+        }
+        return 0;
+    }
+
+    cc = CPU_GET_CLASS(cpu);
+    if (cc->memory_rw_debug) {
+        return cc->memory_rw_debug(cpu, addr, buf, len, is_write);
+    }
+
+    return cpu_memory_rw_debug(cpu, addr, buf, len, is_write);
+}
+
+
+/*
  * Softmmu specific command helpers
  */
+
+void gdb_handle_query_qemu_phy_mem_mode(GArray *params,
+                                        void *user_ctx)
+{
+    g_string_printf(gdbserver_state.str_buf, "%d", phy_memory_mode);
+    gdb_put_strbuf();
+}
+
+void gdb_handle_set_qemu_phy_mem_mode(GArray *params, void *user_ctx)
+{
+    if (!params->len) {
+        gdb_put_packet("E22");
+        return;
+    }
+
+    if (!get_param(params, 0)->val_ul) {
+        phy_memory_mode = 0;
+    } else {
+        phy_memory_mode = 1;
+    }
+    gdb_put_packet("OK");
+}
+
 void gdb_handle_query_rcmd(GArray *params, void *user_ctx)
 {
     const guint8 zero = 0;