+++ /dev/null
-/*
- * Acess2 - x86 Architecture
- * arch/x86/errors.c
- * - CPU Error Handler
- */
-#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 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 ===
-/**
- * \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->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 ;
- }
-
- Debug_KernelPanic();
-
- LogF("CPU %i Error %i - %s, Code: 0x%x - At %08x\n",
- 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 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);
- __asm__ __volatile__ ("mov %%cr2, %0":"=r"(cr));
- Warning(" CR2 0x%08x", cr);
- __asm__ __volatile__ ("mov %%cr3, %0":"=r"(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);
-
- // Dump running threads
- Threads_Dump();
-
- 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;
-
- //if(eip < 0xC0000000 && eip > 0x1000)
- //{
- // LogF("Backtrace: User - 0x%x\n", eip);
- // return;
- //}
-
- #if 0
- if(eip > 0xE0000000)
- {
- LogF("Backtrace: Data Area - 0x%x\n", eip);
- return;
- }
-
- if(eip > 0xC8000000)
- {
- LogF("Backtrace: Kernel Module - 0x%x\n", eip);
- return;
- }
- #endif
-
- //str = Debug_GetSymbol(eip, &delta);
-// if(str == NULL)
- LogF("Backtrace: 0x%x", eip);
-// else
-// LogF("Backtrace: %s+0x%x", str, delta);
- if(!MM_GetPhysAddr(ebp))
- {
- LogF("\nBacktrace: Invalid EBP, stopping\n");
- return;
- }
-
-
- while( MM_GetPhysAddr(ebp) && i < MAX_BACKTRACE )
- {
- if( ebp >= MM_KERNEL_STACKS_END ) break;
- //str = Debug_GetSymbol(*(Uint*)(ebp+4), &delta);
-// if(str == NULL)
- LogF(" >> 0x%x", *(Uint*)(ebp+4));
-// else
-// LogF(" >> %s+0x%x", str, delta);
- ebp = *(Uint*)ebp;
- i++;
- }
- LogF("\n");
-}
-
-/**
- * \fn void StartupPrint(char *Str)
- * \brief Str String to print
- * \note WHY IS THIS HERE?!?!
- */
-void StartupPrint(char *Str)
-{
- Uint16 *buf = (void*)0xC00B8000;
- int i = 0;
- static int line = 0;
- while(*Str)
- {
- buf[line*80 + i++] = *Str | 0x0700;
- Str ++;
- }
-
- // Clear the rest of the line
- while(i < 80)
- buf[line*80 + i++] = 0x0720;
-
- line ++;
- if(line == 25)
- {
- line --;
- memcpy(buf, &buf[80], 80*24*2);
- memset(&buf[80*24], 0, 80*2);
- }
-}
-
-// === EXPORTS ===
-EXPORT(__stack_chk_fail);
git.ucc.asn.au / tpg / acess2.git / blobdiff
UCC git Repository :: git.ucc.asn.au