1 files changed, 40 insertions, 0 deletions
diff --git a/kernel/log.c b/kernel/log.c
new file mode 100644
index 0000000..56d38e8
--- /dev/null
+++ b/kernel/log.c
@@ -0,0 +1,40 @@
+#include "log.h"
+#include <sched/scheduler.h>
+
+struct stackframe {
+  struct stackframe *ebp;
+  uint32_t eip;
+};
+
+void dump_backtrace(uint32_t max_frames) {
+  struct stackframe *stk;
+  asm("mov %%ebp,%0" : "=r"(stk)::);
+  kprintf("Stack trace:\n");
+  for (uint32_t frame = 0; stk && frame < max_frames; ++frame) {
+    kprintf(" 0x%x\n", stk->eip);
+    stk = stk->ebp;
+  }
+  if (get_current_task()) {
+    kprintf(" PID: %x\n", get_current_task()->pid);
+  }
+}
+
+void klog(char *str, int code) {
+  switch (code) {
+  case LOG_NOTE:
+    kprintf("[NOTE] ");
+    break;
+  case LOG_WARN:
+    kprintf("[WARN] ");
+    break;
+  case LOG_ERROR:
+    kprintf("[ERROR] ");
+    break;
+  default:
+  case LOG_SUCCESS:
+    kprintf("[SUCCESS] ");
+    break;
+  }
+
+  puts(str);
+}