implemented exception handling

kernel/inc/platform/exceptions.h

@@ -0,0 +1,57 @@
+/* Copyright (C) Antifallobst <antifallobst@systemausfall.org>
+ *
+ * NoxOS is free software:
+ * you can redistribute it and/or modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 3 of the License,
+ * or (at your option) any later version.
+ *
+ * NoxOS is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+ * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with this program.
+ * If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef NOX_EXCEPTIONS_H
+#define NOX_EXCEPTIONS_H
+
+#include "platform/cpu.h"
+#include "utils/string.h"
+
+typedef enum {
+    EXCEPTION_DIVISION                  = 0x00,
+    EXCEPTION_DEBUG                     = 0x01,
+    EXCEPTION_NON_MASKABLE_INTERRUPT    = 0x02,
+    EXCEPTION_BREAKPOINT                = 0x03,
+    EXCEPTION_OVERFLOW                  = 0x04,
+    EXCEPTION_BOUND_RANGE_EXCEEDED      = 0x05,
+    EXCEPTION_INVALID_OPCODE            = 0x06,
+    EXCEPTION_DEVICE_NOT_AVAILABLE      = 0x07,
+    EXCEPTION_DOUBLE_FAULT              = 0x08,
+
+    EXCEPTION_INVALID_TSS               = 0x0A,
+    EXCEPTION_SEGMENT_NOT_PRESENT       = 0x0B,
+    EXCEPTION_STACK_SEGMENT_FAULT       = 0x0C,
+    EXCEPTION_GENERAL_PROTECTION_FAULT  = 0x0D,
+    EXCEPTION_PAGE_FAULT                = 0x0E,
+
+    EXCEPTION_X87_FLOATING_POINT        = 0x10,
+    EXCEPTION_ALIGNMENT_CHECK           = 0x11,
+    EXCEPTION_MACHINE_CHECK             = 0x12,
+    EXCEPTION_SIMD_FLOATING_POINT       = 0x13,
+    EXCEPTION_VIRTUALIZATION            = 0x14,
+    EXCEPTION_CONTROL_PROTECTION        = 0x15,
+
+    EXCEPTION_HYPERVISOR_INJECTION      = 0x1C,
+    EXCEPTION_VMM_COMMUNICATION         = 0x1D,
+    EXCEPTION_SECURITY_EXCEPTION        = 0x1E,
+
+    EXCEPTIONS_ENUM_END                 = 0x1F  // not an exception code
+} exception_type_E;
+
+extern string_t g_exception_type_strings[EXCEPTIONS_ENUM_END];
+
+cpu_state_T* exception_handle(cpu_state_T* state);
+
+#endif //NOX_EXCEPTIONS_H

kernel/inc/utils/core.h

@@ -16,7 +16,10 @@
 #ifndef NOX_CORE_H
 #define NOX_CORE_H
 
-#define CORE_HALT_FOREVER   while(1) { asm("hlt"); }
+#include "utils/logger.h"
+
 #define CORE_HALT_WHILE(a)  while(a) { asm("hlt"); }
+#define CORE_HALT_FOREVER   log(LOG_WARNING, "!=====[ HALTING SYSTEM ]=====!");\
+                            while(1) { asm("hlt"); }
 
 #endif //NOX_CORE_H

kernel/inc/utils/panic.h

@@ -0,0 +1,24 @@
+/* Copyright (C) Antifallobst <antifallobst@systemausfall.org>
+ *
+ * NoxOS is free software:
+ * you can redistribute it and/or modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 3 of the License,
+ * or (at your option) any later version.
+ *
+ * NoxOS is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+ * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with this program.
+ * If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef NOX_PANIC_H
+#define NOX_PANIC_H
+
+#include "platform/cpu.h"
+#include "utils/string.h"
+
+void panic(cpu_state_T* state, string_t message);
+
+#endif //NOX_PANIC_H

kernel/src/kmain.c

@@ -37,8 +37,8 @@ void kmain(boot_info_T boot_info) {
 
     kernel_init(&boot_info);
 
-    log(LOG_DEBUG, "FIRING TEST INTERRUPT");
+    // this should cause a kernel panic
-    asm("int $0x01");
+    int x = 1312 / 0;
 
     CORE_HALT_FOREVER
 }

kernel/src/platform/exceptions.c

@@ -0,0 +1,55 @@
+/* Copyright (C) Antifallobst <antifallobst@systemausfall.org>
+ *
+ * NoxOS is free software:
+ * you can redistribute it and/or modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 3 of the License,
+ * or (at your option) any later version.
+ *
+ * NoxOS is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+ * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with this program.
+ * If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "platform/exceptions.h"
+#include "utils/panic.h"
+
+string_t g_exception_type_strings[EXCEPTIONS_ENUM_END] = {
+        "Division Error",
+        "Debug Exception",
+        "Non Maskable Interrupt",
+        "Breakpoint Exception",
+        "Overflow Exception",
+        "Bound Range Exceeded Exception",
+        "Invalid Opcode",
+        "Device Not Available",
+        "Double Fault",
+        "[ DEPRECATED ] Coprocessor Segment Overrun",
+        "Invalid TSS",
+        "Segment Not Present",
+        "Stack Segment Fault",
+        "General Protection Fault",
+        "Page Fault",
+        "RESERVED EXCEPTION",
+        "x87 Floating Point Exception",
+        "Alignment Check",
+        "Machine Check",
+        "SIMD Floating Point Exception",
+        "Virtualization Exception",
+        "Control Protection Exception",
+        "RESERVED EXCEPTION",
+        "RESERVED EXCEPTION",
+        "RESERVED EXCEPTION",
+        "RESERVED EXCEPTION",
+        "RESERVED EXCEPTION",
+        "RESERVED EXCEPTION",
+        "Hypervisor Injection Exception",
+        "VMM Communication Exception",
+        "Security Exception"
+};
+
+cpu_state_T* exception_handle(cpu_state_T* state) {
+    panic(state, g_exception_type_strings[state->interrupt_id]);
+}

kernel/src/platform/interrupts.c

@@ -15,6 +15,7 @@
 
 #include "platform/interrupts.h"
 #include "platform/cpu.h"
+#include "platform/exceptions.h"
 #include "mm/page_frame.h"
 #include "utils/logger.h"
 
@@ -118,7 +119,13 @@ void idt_init() {
 }
 
 cpu_state_T* interrupts_handle(cpu_state_T* state) {
-    log(LOG_DEBUG, "Interrupt");
+    if (state->interrupt_id < EXCEPTIONS_ENUM_END) {
-    while(true)asm("hlt");
+        return exception_handle(state);
+    }
+
+
+    log(LOG_WARNING, "Non exception interrupt detected");
+
+    return state;
 }
 

kernel/src/utils/panic.c

@@ -0,0 +1,25 @@
+/* Copyright (C) Antifallobst <antifallobst@systemausfall.org>
+ *
+ * NoxOS is free software:
+ * you can redistribute it and/or modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 3 of the License,
+ * or (at your option) any later version.
+ *
+ * NoxOS is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+ * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with this program.
+ * If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "utils/panic.h"
+#include "utils/logger.h"
+#include "utils/core.h"
+
+void panic(cpu_state_T* state, string_t message) {
+    log(LOG_ERROR, "!=====[ KERNEL PANIC ]=====!");
+    log(LOG_ERROR, message);
+
+    CORE_HALT_FOREVER
+}