Back to a basic UEFI stub

src/boot/error.cpp

@@ -0,0 +1,66 @@
+#include "error.h"
+#include "console.h"
+
+namespace boot {
+namespace error {
+
+handler *handler::s_current = nullptr;
+
+[[ noreturn ]] void
+raise(uefi::status status, const wchar_t *message)
+{
+	if (handler::s_current) {
+		handler::s_current->handle(status, message);
+	}
+	while (1) asm("hlt");
+}
+
+handler::handler() :
+	m_next(s_current)
+{
+	s_current = this;
+}
+
+handler::~handler()
+{
+	if (s_current != this)
+		raise(uefi::status::warn_stale_data,
+				L"Non-current error handler destructing");
+	s_current = m_next;
+}
+
+uefi_handler::uefi_handler(console &con) :
+	handler(),
+	m_con(con)
+{
+}
+
+[[ noreturn ]] void
+uefi_handler::handle(uefi::status s, const wchar_t *message)
+{
+	m_con.status_fail(message);
+	while (1) asm("hlt");
+}
+
+cpu_assert_handler::cpu_assert_handler() : handler() {}
+
+[[ noreturn ]] void
+cpu_assert_handler::handle(uefi::status s, const wchar_t *message)
+{
+	asm volatile (
+		"movq $0xeeeeeeebadbadbad, %%r8;"
+		"movq %0, %%r9;"
+		"movq $0, %%rdx;"
+		"divq %%rdx;"
+		:
+		: "r"((uint64_t)s)
+		: "rax", "rdx", "r8", "r9");
+	while (1) asm("hlt");
+}
+
+} // namespace error
+} // namespace boot
+
+extern "C" int _purecall() { ::boot::error::raise(uefi::status::unsupported, L"Pure virtual call"); }
+void operator delete (void *) {}
+