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Added a friendly message on panic, and SIGSEGV no longer panics.

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This commit is contained in:
Jonas 'Sortie' Termansen 2011-09-07 17:48:01 +02:00
parent 8a085f6fa0
commit 1a2446fca6
2 changed files with 32 additions and 3 deletions
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27
sortix/isr.cpp
View file

@ -10,6 +10,11 @@
#include "isr.h"
#include "panic.h"
#include "process.h" // Hack for SIGSEGV
#include "sound.h" // Hack for SIGSEGV
using namespace Sortix;
size_t numknownexceptions = 19;
const char* exceptions[] = { "Divide by zero", "Debug", "Non maskable interrupt", "Breakpoint",
"Into detected overflow", "Out of bounds", "Invalid opcode",
@ -31,10 +36,26 @@ const char* exceptions[] = { "Divide by zero", "Debug", "Non maskable interrupt"
#ifdef PLATFORM_X86
if ( Regs->int_no < 32 )
{
const char* message = ( Regs->int_no < numknownexceptions ) ? exceptions[Regs->int_no] : "Unknown";
//Sortix::Log::PrintF("eax=0x%x\tebx=0x%x\tecx=0x%x\tedx=0x%x\tesi=0x%x\tedi=0x%x\tesp=0x%x\tuseresp=0x%x\tebp=0x%x\teip=0x%x\n", Regs->eax, Regs->ebx, Regs->ecx, Regs->edx, Regs->esi, Regs->edi, Regs->esp, Regs->useresp, Regs->ebp, Regs->eip);
const char* message = ( Regs->int_no < numknownexceptions )
? exceptions[Regs->int_no] : "Unknown";
Sortix::PanicF("Unhandled CPU Exception id %zu '%s' at eip=0x%zx (cr2=0x%p, err_code=0x%p)", Regs->int_no, message, Regs->eip, Regs->cr2, Regs->err_code);
// Halt and catch fire if we are the kernel.
if ( (Regs->cs & (0x4-1)) == 0 )
{
PanicF("Unhandled CPU Exception id %zu '%s' at eip=0x%zx "
"(cr2=0x%p, err_code=0x%p)", Regs->int_no, message,
Regs->eip, Regs->cr2, Regs->err_code);
}
Log::Print("The current program has crashed and was terminated:\n");
Log::PrintF("%s exception at eip=0x%zx (cr2=0x%p, err_code=0x%p)\n",
message, Regs->eip, Regs->cr2, Regs->err_code);
Sound::Mute();
const char* programname = "sh";
Regs->ebx = (uint32_t) programname;
SysExecute(Regs);
return;
}
if ( interrupt_handlers[Regs->int_no] != NULL )

8
sortix/panic.cpp
View file

@ -32,7 +32,11 @@ using namespace Maxsi;
namespace Sortix
{
#if defined(DEBUG) || defined(PANIC_LONG)
bool longpanic = false;
#else
bool longpanic = true;
#endif
void PanicInit()
{
@ -57,6 +61,10 @@ namespace Sortix
Log::Print(" \n");
Log::Print(" RED MAXSI OF DEATH \n");
Log::Print(" \n");
Log::Print("A critical error occured within the kernel of the operating system and it has\n");
Log::Print("forcefully shut down as a last resort.\n");
Log::Print("\n");
Log::Print("Technical information:\n");
}
else
{