From 9b22a6965579ea1867aea291d910c96f386b518b Mon Sep 17 00:00:00 2001
From: Brett Weiland <brett_weiland@bpcspace.com>
Date: Tue, 24 Aug 2021 14:09:29 -0500
Subject: major backup 8.24.21

---
 src/kernel/panic.c | 80 +++++++++++++++++++++++++++++++++++++++---------------
 1 file changed, 58 insertions(+), 22 deletions(-)

(limited to 'src/kernel/panic.c')

diff --git a/src/kernel/panic.c b/src/kernel/panic.c
index 851684a..82a761f 100644
--- a/src/kernel/panic.c
+++ b/src/kernel/panic.c
@@ -1,13 +1,15 @@
 #include <panic.h>
 #include <stdint.h>
 #include <printf.h>
+#include <kernel.h>
+#include <serial.h>
+#include <isv.h>
 
-void panic(int reason, int type) { // will fill with debugging info latter
+void panic(int reason, void *eframe_p, struct registers *regs) { // will fill with debugging info latter
+  
   
-  struct stack_frame *frame;
-
 #ifdef EASTEREGG_BLOATWARE
-  printf("Kernel PANIC!!!!!!!\n");
+  printf("\nKernel PANIC!!!!!!!\n");
   printf(
 "     _.-^^---....,,--       \n"
 " _--                  --_  \n"
@@ -24,31 +26,65 @@ void panic(int reason, int type) { // will fill with debugging info latter
   printf("Kernel Panic!\n");
 #endif
 
-  printf("Reason:\n");
-
   switch(reason) {
-  case KERNEL_PANIC_PMAPSIZE :
-    printf("\tThe physical map can't fit in the first memory zone.\n"
-        "\tNote: If you have this issue, please contact me.\n"
-        "\tIt's a fixable bug caused by an unlikely scenario.\n");
-    break;
-  case KERNEL_PANIC_RSDP_UNFOUND:
-    printf("\tRSDP unfound!\n");
-    break;
-  case KERNEL_PANIC_KERNEL_RETURNED:
-    printf("\tThe kernel (almost) reached its return!\n");
-    break;
+    case KERNEL_PANIC_HW_EXCEPTION:
+    case KERNEL_PANIC_HW_EXCEPTION_ERR:
+      printf("\nHardware exception in kernel space!\n");
+      break;
+    
+    case KERNEL_PANIC_RSDP_UNFOUND:
+      printf("\nRSDP unfound!\n");
+      break;
+    case KERNEL_PANIC_KERNEL_RETURNED:
+      printf("\nThe kernel (almost) reached its return!\n");
+      break;
+    case KERNEL_PANIC_INVALID_PFREE:
+      printf("\npfree was called with invalid paramaters.\n");
+      break;
+    case KERNEL_PANIC_INVALID_RSDT:
+      printf("\nInvalid RSDT or XSDT after RSDP verification.\nIf this happens, go buy some lottery tickets.\n");
+      break;
+    case KERNEL_PANIC_INVALID_IOAPIC_VEC:
+      printf("\nThe kernel tried to make a vector that was too high for the IOAPIC to handle.\n");
+      break;
+    case KERNEL_PANIC_HPET_REQUIRED:
+      printf("\nHPET is required. \nIf you get this error, let know;\nif enough people share this issue, I'll impliment PIT usage.\n");
+    default:
+      printf("\nUnknown panic code %i\n.", reason);
+      break;
   }
-  printf("\nStack trace:\n");
+  struct stack_frame *frame;
 
-  asm("mov %%rbp,%0" : "=r"(frame) ::);
+  char reg_str[156];
+  if((reason == KERNEL_PANIC_HW_EXCEPTION) || (reason == KERNEL_PANIC_HW_EXCEPTION_ERR)) {
+    sprintf(reg_str, "rax:\t0x%lx\n"
+        "rbx:\t0x%lx\n"
+        "rcx:\t0x%lx\n"
+        "rdx:\t0x%lx\n"
+        "rsi:\t0x%lx\n"
+        "rdi:\t0x%lx\n", regs->rax, regs->rbx, regs->rcx, regs->rdx, regs->rsi, regs->rdi);
+  }
 
+  if(reason == KERNEL_PANIC_HW_EXCEPTION) {
+    struct int_frame *ex_frame = eframe_p;
+    printf("Offending instruction:\t0x%p\n", ex_frame->rip);
+    printf(reg_str);
+  }
+  else if (reason == KERNEL_PANIC_HW_EXCEPTION_ERR) {
+    struct exception_frame *ex_frame = eframe_p;
+    printf("Offending instruction: 0x%p\nError value: %x\n", ex_frame->frame.rip, ex_frame->err);
+    printf(reg_str);
+  }
+  asm("mov %0, rbp" : "=r"(frame) ::);
+  printf("\nCall trace:\n");
+  
   for(; frame->next != 0; frame = frame->next) {
-    printf("\t%x\n", frame->function_base);
+    printf("\t0x%p\n", frame->function_base);
   }
+  
 
-  //It's not public yet, but it will be
+  //It's not public yet, but if I ever get somewhere it will be
   printf("\nAfter ensuring your computer meets the requirements specified, if you think this is a bug, please open an issue on the git repo or email me at %s.\n", DEV_EMAIL);
-  for(;;);
+  asm("cli\nhlt");
 
 }
-- 
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