os: rework kernel architecture

Rework the code structure and architecture of the kernel by separating
platform-dependent and platform-independent code more cleanly. As of
this patchset, full feature parity has not been achieved. Nonetheless, a
sufficient subset of functionality has been ported to the new
architecture to demonstrate the feasibility of the new structure.

1 files changed, 25 insertions, 0 deletions

diff --git a/arch/x86_64/pre/src/exception_handling/panic.cpp b/arch/x86_64/pre/src/exception_handling/panic.cpp
new file mode 100644
index 0000000..9511a9a
--- /dev/null
+++ b/arch/x86_64/pre/src/exception_handling/panic.cpp
@@ -0,0 +1,25 @@
+#include "arch/exception_handling/panic.hpp"
+
+#include "arch/kernel/halt.hpp"
+#include "arch/video/vga/text.hpp"
+
+namespace teachos::arch::exception_handling
+{
+  extern "C" char const message_prefix_panic[];
+
+  auto panic(char const * reason) -> void
+  {
+    panic(message_prefix_panic, reason);
+  }
+
+  auto panic(char const * prefix, char const * reason) -> void
+  {
+    using video::vga::text::common_attributes::white_on_red;
+
+    video::vga::text::newline();
+    video::vga::text::write(prefix, white_on_red);
+    video::vga::text::write(reason, white_on_red);
+
+    kernel::halt();
+  };
+}  // namespace teachos::arch::exception_handling