Add panic/stack trace display on fb for real hardware debug

src/debug/panic.c

@@ -3,6 +3,8 @@
 #include "io/serial/serial.h"
 #include "kernel.h"
 
+extern struct init_status init;
+
 void panic(struct cpu_status_t* ctx, const char* str)
 {
 	CLEAR_INTERRUPTS;
@@ -15,6 +17,13 @@ void panic(struct cpu_status_t* ctx, const char* str)
 		skputc('\r');
 		skputc('\n');
 		DEBUG("\x1b[38;5;231m\x1b[48;5;196mend Kernel panic - halting...\x1b[0m");
+
+		if (init.terminal)
+		{
+			printf("\r\n\x1b[38;5;231m\x1b[48;5;196mKernel panic!!!\x1b[0m Something went horribly wrong! (no cpu ctx)");
+			printf("\r\n%s\r\n\x1b[38;5;231m\x1b[48;5;196mend Kernel panic - halting...\x1b[0m", str);
+		}
+
 		hcf();
 	}
 	DEBUG("\x1b[38;5;231m\x1b[48;5;196mKernel panic!!!\x1b[0m at rip=%p\r\nSomething went horribly wrong! (%s) vect=0x%.2x errcode=0x%x\n\rrax=%p rbx=%p rcx=%p rdx=%p\n\rrsi=%p rdi=%p  r8=%p  r9=%p\n\rr10=%p r11=%p r12=%p r13=%p\n\rr14=%p r15=%p\n\n\rflags=%p\n\rHalting...",
@@ -22,6 +31,17 @@ void panic(struct cpu_status_t* ctx, const char* str)
 		str,
 		ctx->vector_number, ctx->error_code, ctx->rax, ctx->rbx, ctx->rcx, ctx->rdx, ctx->rsi, ctx->rdi,
 		ctx->r8, ctx->r9, ctx->r10, ctx->r11, ctx->r12, ctx->r13, ctx->r14, ctx->r15, ctx->iret_flags);
+	
+	if (init.terminal)
+	{
+		printf("\r\n\x1b[38;5;231m\x1b[48;5;196mKernel panic!!!\x1b[0m at rip=%p\r\nSomething went horribly wrong! (%s) vect=0x%.2x errcode=0x%x\n\rrax=%p rbx=%p rcx=%p rdx=%p\n\rrsi=%p rdi=%p  r8=%p  r9=%p\n\rr10=%p r11=%p r12=%p r13=%p\n\rr14=%p r15=%p\n\n\rflags=%p\n\rHalting...",
+		ctx->iret_rip,
+		str,
+		ctx->vector_number, ctx->error_code, ctx->rax, ctx->rbx, ctx->rcx, ctx->rdx, ctx->rsi, ctx->rdi,
+		ctx->r8, ctx->r9, ctx->r10, ctx->r11, ctx->r12, ctx->r13, ctx->r14, ctx->r15, ctx->iret_flags);
+	}
+	
 	debug_stack_trace(100);
+	
 	hcf();
 }

src/debug/stacktrace.c

@@ -1,9 +1,15 @@
 #include <stdint.h>
 #include "kernel.h"
 
+extern struct init_status init;
+
 void debug_stack_trace(unsigned int max_frames)
 {
     DEBUG("*** begin stack trace ***");
+    if (init.terminal)
+    {
+        printf("\r\n*** begin stack trace ***\r\n");
+    }
     // Thanks GCC :)
     uintptr_t* rbp = (uintptr_t*)__builtin_frame_address(0);
 
@@ -15,6 +21,11 @@ void debug_stack_trace(unsigned int max_frames)
         const char* name = debug_find_symbol(rip, &offset);
         DEBUG("[%u] <0x%p> (%s+0x%x)", frame, (void*)rip, name, offset);
 
+        if (init.terminal)
+        {
+            printf("[%u] <0x%p> (%s+0x%x)\r\n", frame, (void*)rip, name, offset);
+        }
+
         uintptr_t* next_rbp = (uintptr_t*)rbp[0];
 
         // invalid rbp or we're at the end
@@ -25,6 +36,10 @@ void debug_stack_trace(unsigned int max_frames)
 
         rbp = next_rbp;
     }
+    if (init.terminal)
+    {
+        printf("*** end stack trace ***");
+    }
     DEBUG("*** end stack trace ***");
 }
 

src/kmain.c

@@ -57,6 +57,7 @@ bool iran = false;
 // Never gets executed although pedicel is scheduled?
 void pedicel_main(void* arg)
 {
+	//panic(NULL, "test");
 	bool iran = true;
 	// FROM THE NEXT LINE ONWARDS, CANNOT WRITE TO FRAMEBUFFER WITHOUT PAGE FAULT!
 	//printf("\n\nWelcome to PepperOS! Pedicel speaking.\nNothing left to do, halting the system!");