x86_64/debug: add support for QEMU debug console

2 files changed, 28 insertions, 3 deletions

diff --git a/arch/x86_64/src/debug/qemu_output.cpp b/arch/x86_64/src/debug/qemu_output.cpp
new file mode 100644
index 0000000..773306f
--- /dev/null
+++ b/arch/x86_64/src/debug/qemu_output.cpp
@@ -0,0 +1,24 @@
+#include "x86_64/debug/qemu_output.hpp"
+
+#include "kapi/cio.hpp"
+
+#include <string_view>
+
+namespace teachos::debug::x86_64
+{
+
+  qemu_output::qemu_output(output_device & lower)
+      : m_lower{lower}
+  {}
+
+  auto qemu_output::write(cio::output_stream stream, std::string_view text) -> void
+  {
+    for (auto c : text)
+    {
+      dbg::write(c);
+    }
+
+    m_lower.write(stream, text);
+  }
+
+}  // namespace teachos::debug::x86_64
diff --git a/arch/x86_64/src/kapi/cio.cpp b/arch/x86_64/src/kapi/cio.cpp
index 617146e..5594fcc 100644
--- a/arch/x86_64/src/kapi/cio.cpp
+++ b/arch/x86_64/src/kapi/cio.cpp
@@ -1,5 +1,6 @@
 #include "kapi/cio.hpp"
 
+#include "x86_64/debug/qemu_output.hpp"
 #include "x86_64/vga/text.hpp"
 
 #include <optional>
@@ -8,12 +9,12 @@ namespace teachos::cio
 {
 
   auto static constinit vga_device = std::optional<vga::x86_64::text::device>{};
+  auto static constinit dbg_device = std::optional<debug::x86_64::qemu_output>{};
 
   auto init() -> void
   {
-    vga_device.emplace();
-    vga_device->cursor(false);
-    set_output_device(*vga_device);
+    vga_device.emplace().cursor(false);
+    set_output_device(dbg_device.emplace(*vga_device));
   }
 
 }  // namespace teachos::cio