*/
#include <acess.h>
#include <proc.h>
+#include <mm_virt.h>
// === CONSTANTS ===
#define MAX_BACKTRACE 8 //!< Maximum distance to trace the stack backwards
// === IMPORTS ===
extern void MM_PageFault(Uint Addr, Uint ErrorCode, tRegs *Regs);
-extern void Threads_Dump();
+extern void VM8086_GPF(tRegs *Regs);
+extern void Threads_Dump(void);
+extern void Threads_Fault(int Num);
+extern int GetCPUNum(void);
+extern void MM_DumpTables(tVAddr, tVAddr);
+extern void Proc_EnableSSE(void);
+extern void Proc_RestoreSSE(Uint32 Data);
// === PROTOTYPES ===
+void __stack_chk_fail(void);
+void ErrorHandler(tRegs *Regs);
+void Proc_PrintBacktrace(void);
void Error_Backtrace(Uint eip, Uint ebp);
+void StartupPrint(char *Str);
+
+// === GLOBALS ===
+const char *csaERROR_NAMES[] = {
+ "Divide By Zero", "Debug", "NMI Exception", "INT3",
+ "INTO Instr - Overflow", "BOUND Instr - Out of Bounds", "Invalid Opcode", "Coprocessor not avaliable",
+ "Double Fault", "Coprocessor Segment Overrun", "Bad TSS", "Segment Not Present",
+ "Stack Fault Exception", "GPF", "#PF", "Reserved",
+ "Floating Point Exception", "Alignment Check Exception", "Machine Check Exception", "Reserved",
+ "Reserved", "Reserved", "Reserved", "Reserved",
+ "Reserved", "Reserved", "Reserved", "Reserved",
+ "Reserved", "Reserved", "Reserved", "Reserved"
+ };
// === CODE ===
-void __stack_chk_fail()
+/**
+ * \brief Keeps GCC happy
+ */
+void __stack_chk_fail(void)
{
Panic("FATAL ERROR: Stack Check Failed\n");
for(;;);
/**
* \fn void ErrorHandler(tRegs *Regs)
* \brief General Error Handler
+ * \param Regs Register state at error
*/
void ErrorHandler(tRegs *Regs)
{
Uint cr;
+
+ //if( Regs && !(Regs->int_num == 13 && Regs->eflags & 0x20000) )
+ // __asm__ __volatile__ ("xchg %bx, %bx");
+ //Log_Debug("X86", "Regs = %p", Regs);
+ //Log_Debug("X86", "Error %i at 0x%08x", Regs->int_num, Regs->eip);
+
__asm__ __volatile__ ("cli");
+ // Debug exception (used for single-stepping)
+ if(Regs->int_num == 1)
+ {
+ static Uint32 lastEIP = 0;
+ tThread *thread = Proc_GetCurThread();
+ if( Regs->eip == lastEIP )
+ return;
+ Log("%p(%i %s) IP=%08x", thread, thread->TID, thread->ThreadName, Regs->eip);
+ lastEIP = Regs->eip;
+ return ;
+ }
+
+ // Page Fault
if(Regs->int_num == 14)
{
+ __asm__ __volatile__ ("sti"); // Should be OK, TODO: Test
__asm__ __volatile__ ("mov %%cr2, %0":"=r"(cr));
MM_PageFault( cr, Regs->err_code, Regs );
return ;
}
+
+ // #NM - Coprocessor unavaliable
+ if(Regs->int_num == 7)
+ {
+ tThread *thread = Proc_GetCurThread();
+ if(!thread->SavedState.bSSEModified)
+ {
+ Proc_EnableSSE();
+ if(!thread->SavedState.SSE)
+ thread->SavedState.SSE = malloc(sizeof(tSSEState) + 0xF);
+ else
+ Proc_RestoreSSE( ((Uint)thread->SavedState.SSE + 0xF) & ~0xF );
+ thread->SavedState.bSSEModified = 1;
+ __asm__ __volatile__ ("sti");
+ return ;
+ }
+ // oops, SSE enabled but a #NM, bad news
+ }
+
+ // VM8086 GPF
+ if(Regs->int_num == 13 && Regs->eflags & 0x20000)
+ {
+ VM8086_GPF(Regs);
+ return ;
+ }
+
+ // Check if it's a user mode fault
+ if( Regs->eip < KERNEL_BASE || (Regs->cs & 3) == 3 ) {
+ Log_Warning("Arch", "User Fault - %s, Code: 0x%x",
+ csaERROR_NAMES[Regs->int_num], Regs->err_code);
+ Log_Warning("Arch", "at CS:EIP %04x:%08x",
+ Regs->cs, Regs->eip);
+ MM_DumpTables(0, KERNEL_BASE);
+ switch( Regs->int_num )
+ {
+ // Division by Zero
+ case 0: Threads_Fault(FAULT_DIV0); break;
+ // Invalid opcode
+ case 6: Threads_Fault(FAULT_OPCODE); break;
+ // GPF
+ case 13: Threads_Fault(FAULT_ACCESS); break;
+ // Floating Point Exception
+ case 16: Threads_Fault(FAULT_FLOAT); break;
+
+ default: Threads_Fault(FAULT_MISC); break;
+ }
+ return ;
+ }
- Warning("CPU Error %i, Code: 0x%x", Regs->int_num, Regs->err_code);
- Warning(" CS:EIP = 0x%04x:%08x", Regs->cs, Regs->eip);
- Warning(" SS:ESP = 0x%04x:%08x", Regs->ss, Regs->esp);
+ Debug_KernelPanic();
+
+ LogF("CPU %i Error %i - %s, Code: 0x%x - At %08x",
+ GetCPUNum(),
+ Regs->int_num, csaERROR_NAMES[Regs->int_num], Regs->err_code,
+ Regs->eip);
+
+ //Warning("CPU Error %i - %s, Code: 0x%x",
+ // Regs->int_num, csaERROR_NAMES[Regs->int_num], Regs->err_code);
+ //Warning(" CS:EIP = 0x%04x:%08x", Regs->cs, Regs->eip);
+ __ASM__ ("xchg %bx, %bx");
+ if(Regs->cs == 0x08)
+ Warning(" SS:ESP = 0x0010:%08x", (Uint)Regs+sizeof(tRegs));
+ else
+ Warning(" SS:ESP = 0x%04x:%08x", Regs->ss, Regs->esp);
Warning(" EFLAGS = 0x%08x", Regs->eflags);
- Warning(" EAX %08x EBX %08x", Regs->eax, Regs->ebx);
- Warning(" ECX %08x EDX %08x", Regs->ecx, Regs->edx);
- Warning(" ESP %08x EBP %08x", Regs->esp, Regs->ebp);
- Warning(" ESI %08x EDI %08x", Regs->esi, Regs->edi);
- Warning(" DS %04x ES %04x", Regs->ds, Regs->es);
- Warning(" FS %04x GS %04x", Regs->fs, Regs->gs);
+ Warning(" EAX %08x ECX %08x EDX %08x EBX %08x",
+ Regs->eax, Regs->ecx, Regs->edx, Regs->ebx);
+ Warning(" ESP %08x EBP %08x ESI %08x EDI %08x",
+ Regs->esp, Regs->ebp, Regs->esi, Regs->edi);
+ Warning(" DS %04x ES %04x FS %04x GS %04x",
+ Regs->ds, Regs->es, Regs->fs, Regs->gs);
// Control Registers
__asm__ __volatile__ ("mov %%cr0, %0":"=r"(cr));
- Warning(" CR0: 0x%08x", cr);
+ Warning(" CR0 0x%08x", cr);
__asm__ __volatile__ ("mov %%cr2, %0":"=r"(cr));
- Warning(" CR2: 0x%08x", cr);
+ Warning(" CR2 0x%08x", cr);
__asm__ __volatile__ ("mov %%cr3, %0":"=r"(cr));
- Warning(" CR3: 0x%08x", cr);
+ Warning(" CR3 0x%08x", cr);
+
+ switch( Regs->int_num )
+ {
+ case 6: // #UD
+ Warning(" Offending bytes: %02x %02x %02x %02x",
+ *(Uint8*)Regs->eip+0, *(Uint8*)Regs->eip+1,
+ *(Uint8*)Regs->eip+2, *(Uint8*)Regs->eip+3);
+ break;
+ }
// Print Stack Backtrace
Error_Backtrace(Regs->eip, Regs->ebp);
for(;;) __asm__ __volatile__ ("hlt");
}
+
+void Proc_PrintBacktrace(void)
+{
+ Uint32 ebp;
+ __asm__ __volatile__ ("mov %%ebp, %0" : "=r" (ebp));
+ Error_Backtrace( *(Uint32*)(ebp+4), *(Uint32*)ebp );
+}
+
/**
* \fn void Error_Backtrace(Uint eip, Uint ebp)
* \brief Unrolls the stack to trace execution
+ * \param eip Current Instruction Pointer
+ * \param ebp Current Base Pointer (Stack Frame)
*/
void Error_Backtrace(Uint eip, Uint ebp)
{
int i = 0;
- Uint delta = 0;
- char *str = NULL;
+// Uint delta = 0;
+// char *str = NULL;
//if(eip < 0xC0000000 && eip > 0x1000)
//{
}
//str = Debug_GetSymbol(eip, &delta);
- if(str == NULL)
+// if(str == NULL)
LogF("Backtrace: 0x%x", eip);
- else
- LogF("Backtrace: %s+0x%x", str, delta);
+// else
+// LogF("Backtrace: %s+0x%x", str, delta);
if(!MM_GetPhysAddr(ebp))
{
LogF("\nBacktrace: Invalid EBP, stopping\n");
while( MM_GetPhysAddr(ebp) && i < MAX_BACKTRACE )
{
+ if( ebp >= MM_KERNEL_STACKS_END ) break;
//str = Debug_GetSymbol(*(Uint*)(ebp+4), &delta);
- if(str == NULL)
+// if(str == NULL)
LogF(" >> 0x%x", *(Uint*)(ebp+4));
- else
- LogF(" >> %s+0x%x", str, delta);
+// else
+// LogF(" >> %s+0x%x", str, delta);
ebp = *(Uint*)ebp;
i++;
}
/**
* \fn void StartupPrint(char *Str)
+ * \brief Str String to print
+ * \note WHY IS THIS HERE?!?!
*/
void StartupPrint(char *Str)
{
Str ++;
}
- while(i < 80) buf[line*80 + i++] = 0x0720;
+ // Clear the rest of the line
+ while(i < 80)
+ buf[line*80 + i++] = 0x0720;
line ++;
if(line == 25)
git.ucc.asn.au / tpg / acess2.git / blobdiff
UCC git Repository :: git.ucc.asn.au