2 * Acess2 - x86 Architecture
10 #define MAX_BACKTRACE 8 //!< Maximum distance to trace the stack backwards
13 extern void MM_PageFault(Uint Addr, Uint ErrorCode, tRegs *Regs);
14 extern void VM8086_GPF(tRegs *Regs);
15 extern void Threads_Dump(void);
16 extern void Threads_Fault(int Num);
17 extern int GetCPUNum(void);
18 extern void MM_DumpTables(tVAddr, tVAddr);
21 void __stack_chk_fail(void);
22 void ErrorHandler(tRegs *Regs);
23 void Error_Backtrace(Uint eip, Uint ebp);
24 void StartupPrint(char *Str);
27 const char *csaERROR_NAMES[] = {
28 "Divide By Zero", "Debug", "NMI Exception", "INT3",
29 "INTO Instr - Overflow", "BOUND Instr - Out of Bounds", "Invalid Opcode", "Coprocessor not avaliable",
30 "Double Fault", "Coprocessor Segment Overrun", "Bad TSS", "Segment Not Present",
31 "Stack Fault Exception", "GPF", "#PF", "Reserved",
32 "Floating Point Exception", "Alignment Check Exception", "Machine Check Exception", "Reserved",
33 "Reserved", "Reserved", "Reserved", "Reserved",
34 "Reserved", "Reserved", "Reserved", "Reserved",
35 "Reserved", "Reserved", "Reserved", "Reserved"
40 * \brief Keeps GCC happy
42 void __stack_chk_fail(void)
44 Panic("FATAL ERROR: Stack Check Failed\n");
49 * \fn void ErrorHandler(tRegs *Regs)
50 * \brief General Error Handler
51 * \param Regs Register state at error
53 void ErrorHandler(tRegs *Regs)
57 //if( Regs && !(Regs->int_num == 13 && Regs->eflags & 0x20000) )
58 // __asm__ __volatile__ ("xchg %bx, %bx");
59 //Log_Debug("X86", "Regs = %p", Regs);
60 //Log_Debug("X86", "Error %i at 0x%08x", Regs->int_num, Regs->eip);
62 __asm__ __volatile__ ("cli");
64 // Debug exception (used for single-stepping)
65 if(Regs->int_num == 1)
67 static Uint32 lastEIP = 0;
68 tThread *thread = Proc_GetCurThread();
69 if( Regs->eip == lastEIP )
71 Log("%p(%i %s) IP=%08x", thread, thread->TID, thread->ThreadName, Regs->eip);
77 if(Regs->int_num == 14)
79 __asm__ __volatile__ ("sti"); // Should be OK, TODO: Test
80 __asm__ __volatile__ ("mov %%cr2, %0":"=r"(cr));
81 MM_PageFault( cr, Regs->err_code, Regs );
86 if(Regs->int_num == 13 && Regs->eflags & 0x20000)
92 // Check if it's a user mode fault
93 if( Regs->eip < KERNEL_BASE || (Regs->cs & 3) == 3 ) {
94 Log_Warning("Arch", "User Fault - %s, Code: 0x%x",
95 csaERROR_NAMES[Regs->int_num], Regs->err_code);
96 Log_Warning("Arch", "at CS:EIP %04x:%08x",
98 MM_DumpTables(0, KERNEL_BASE);
99 switch( Regs->int_num )
102 case 0: Threads_Fault(FAULT_DIV0); break;
104 case 6: Threads_Fault(FAULT_OPCODE); break;
106 case 13: Threads_Fault(FAULT_ACCESS); break;
107 // Floating Point Exception
108 case 16: Threads_Fault(FAULT_FLOAT); break;
110 default: Threads_Fault(FAULT_MISC); break;
117 LogF("CPU %i Error %i - %s, Code: 0x%x - At %08x",
119 Regs->int_num, csaERROR_NAMES[Regs->int_num], Regs->err_code,
122 //Warning("CPU Error %i - %s, Code: 0x%x",
123 // Regs->int_num, csaERROR_NAMES[Regs->int_num], Regs->err_code);
124 //Warning(" CS:EIP = 0x%04x:%08x", Regs->cs, Regs->eip);
125 __ASM__ ("xchg %bx, %bx");
127 Warning(" SS:ESP = 0x0010:%08x", (Uint)Regs+sizeof(tRegs));
129 Warning(" SS:ESP = 0x%04x:%08x", Regs->ss, Regs->esp);
130 Warning(" EFLAGS = 0x%08x", Regs->eflags);
131 Warning(" EAX %08x ECX %08x EDX %08x EBX %08x",
132 Regs->eax, Regs->ecx, Regs->edx, Regs->ebx);
133 Warning(" ESP %08x EBP %08x ESI %08x EDI %08x",
134 Regs->esp, Regs->ebp, Regs->esi, Regs->edi);
135 Warning(" DS %04x ES %04x FS %04x GS %04x",
136 Regs->ds, Regs->es, Regs->fs, Regs->gs);
139 __asm__ __volatile__ ("mov %%cr0, %0":"=r"(cr));
140 Warning(" CR0 0x%08x", cr);
141 __asm__ __volatile__ ("mov %%cr2, %0":"=r"(cr));
142 Warning(" CR2 0x%08x", cr);
143 __asm__ __volatile__ ("mov %%cr3, %0":"=r"(cr));
144 Warning(" CR3 0x%08x", cr);
146 switch( Regs->int_num )
149 Warning(" Offending bytes: %02x %02x %02x %02x",
150 *(Uint8*)Regs->eip+0, *(Uint8*)Regs->eip+1,
151 *(Uint8*)Regs->eip+2, *(Uint8*)Regs->eip+3);
155 // Print Stack Backtrace
156 Error_Backtrace(Regs->eip, Regs->ebp);
158 // Dump running threads
161 for(;;) __asm__ __volatile__ ("hlt");
164 * \fn void Error_Backtrace(Uint eip, Uint ebp)
165 * \brief Unrolls the stack to trace execution
166 * \param eip Current Instruction Pointer
167 * \param ebp Current Base Pointer (Stack Frame)
169 void Error_Backtrace(Uint eip, Uint ebp)
175 //if(eip < 0xC0000000 && eip > 0x1000)
177 // LogF("Backtrace: User - 0x%x\n", eip);
183 LogF("Backtrace: Data Area - 0x%x\n", eip);
189 LogF("Backtrace: Kernel Module - 0x%x\n", eip);
193 //str = Debug_GetSymbol(eip, &delta);
195 LogF("Backtrace: 0x%x", eip);
197 LogF("Backtrace: %s+0x%x", str, delta);
198 if(!MM_GetPhysAddr(ebp))
200 LogF("\nBacktrace: Invalid EBP, stopping\n");
205 while( MM_GetPhysAddr(ebp) && i < MAX_BACKTRACE )
207 //str = Debug_GetSymbol(*(Uint*)(ebp+4), &delta);
209 LogF(" >> 0x%x", *(Uint*)(ebp+4));
211 LogF(" >> %s+0x%x", str, delta);
219 * \fn void StartupPrint(char *Str)
220 * \brief Str String to print
221 * \note WHY IS THIS HERE?!?!
223 void StartupPrint(char *Str)
225 Uint16 *buf = (void*)0xC00B8000;
230 buf[line*80 + i++] = *Str | 0x0700;
234 // Clear the rest of the line
236 buf[line*80 + i++] = 0x0720;
242 memcpy(buf, &buf[80], 80*24*2);
243 memset(&buf[80*24], 0, 80*2);
248 EXPORT(__stack_chk_fail);