Draft: lab 3 irq wtf

kernel/lib/exception.c

@@ -0,0 +1,42 @@
+#include <exception.h>
+#include <errcode.h>
+#include <stddef.h>
+#include <logger.h>
+#include <utils.h>
+
+void init_exception()
+{
+  asm volatile(
+    "adr x0, exception_vector_table" ENDL
+    "msr vbar_el1, x0" ENDL
+    ::: "x0"
+  );
+}
+
+void not_implemented_handler()
+{
+  DEBUG_EXCEP("not implemented caught");
+}
+
+void synchronous_handler()
+{
+  static int count = 0;
+  if (count++ > 5)
+    exit(ERR_ADMINKILL);
+  DEBUG_EXCEP("synchronous caught");
+  uint64_t x0 = 0x0;
+  R_REG(x0, x0);
+  LOG(x0);
+  
+  uint64_t spsr_el1 = 0x0;
+  R_SYSREG(spsr_el1, spsr_el1);
+  LOG(spsr_el1);
+
+  uint64_t elr_el1 = 0x0;
+  R_SYSREG(elr_el1, elr_el1);
+  LOG(elr_el1);
+
+  uint64_t esr_el1 = 0x0;
+  R_SYSREG(esr_el1, esr_el1);
+  DEBUG_EXCEP(esr_el1);
+}