void show_regs(struct pt_regs *fp) { #ifdef CONFIG_DEBUG_VERBOSE char buf [150]; struct irqaction *action; unsigned int i; unsigned long flags = 0; unsigned int cpu = smp_processor_id(); unsigned char in_atomic = (bfin_read_IPEND() & 0x10) || in_atomic(); verbose_printk(KERN_NOTICE "\n" KERN_NOTICE "SEQUENCER STATUS:\t\t%s\n", print_tainted()); verbose_printk(KERN_NOTICE " SEQSTAT: %08lx IPEND: %04lx SYSCFG: %04lx\n", (long)fp->seqstat, fp->ipend, fp->syscfg); if ((fp->seqstat & SEQSTAT_EXCAUSE) == VEC_HWERR) { verbose_printk(KERN_NOTICE " HWERRCAUSE: 0x%lx\n", (fp->seqstat & SEQSTAT_HWERRCAUSE) >> 14); #ifdef EBIU_ERRMST /* If the error was from the EBIU, print it out */ if (bfin_read_EBIU_ERRMST() & CORE_ERROR) { verbose_printk(KERN_NOTICE " EBIU Error Reason : 0x%04x\n", bfin_read_EBIU_ERRMST()); verbose_printk(KERN_NOTICE " EBIU Error Address : 0x%08x\n", bfin_read_EBIU_ERRADD()); } #endif }
void dump_bfin_mem(struct pt_regs *fp) { #ifdef CONFIG_DEBUG_VERBOSE unsigned short *addr, *erraddr, val = 0, err = 0; char sti = 0, buf[6]; erraddr = (void *)fp->pc; verbose_printk(KERN_NOTICE "return address: [0x%p]; contents of:", erraddr); for (addr = (unsigned short *)((unsigned long)erraddr & ~0xF) - 0x10; addr < (unsigned short *)((unsigned long)erraddr & ~0xF) + 0x10; addr++) { if (!((unsigned long)addr & 0xF)) verbose_printk("\n" KERN_NOTICE "0x%p: ", addr); if (!get_instruction(&val, addr)) { val = 0; sprintf(buf, "????"); } else sprintf(buf, "%04x", val); if (addr == erraddr) { verbose_printk("[%s]", buf); err = val; } else verbose_printk(" %s ", buf); /* Do any previous instructions turn on interrupts? */ if (addr <= erraddr && /* in the past */ ((val >= 0x0040 && val <= 0x0047) || /* STI instruction */ val == 0x017b)) /* [SP++] = RETI */ sti = 1; } verbose_printk("\n"); /* Hardware error interrupts can be deferred */ if (unlikely(sti && (fp->seqstat & SEQSTAT_EXCAUSE) == VEC_HWERR && oops_in_progress)){ verbose_printk(KERN_NOTICE "Looks like this was a deferred error - sorry\n"); #ifndef CONFIG_DEBUG_HWERR verbose_printk(KERN_NOTICE "The remaining message may be meaningless\n" KERN_NOTICE "You should enable CONFIG_DEBUG_HWERR to get a" " better idea where it came from\n"); #else /* If we are handling only one peripheral interrupt * and current mm and pid are valid, and the last error * was in that user space process's text area * print it out - because that is where the problem exists */ if ((!(((fp)->ipend & ~0x30) & (((fp)->ipend & ~0x30) - 1))) && (current->pid && current->mm)) { /* And the last RETI points to the current userspace context */ if ((fp + 1)->pc >= current->mm->start_code && (fp + 1)->pc <= current->mm->end_code) { verbose_printk(KERN_NOTICE "It might be better to look around here : \n"); verbose_printk(KERN_NOTICE "-------------------------------------------\n"); show_regs(fp + 1); verbose_printk(KERN_NOTICE "-------------------------------------------\n"); } } #endif } #endif }
void dump_bfin_process(struct pt_regs *fp) { #ifdef CONFIG_DEBUG_VERBOSE /* We should be able to look at fp->ipend, but we don't push it on the * stack all the time, so do this until we fix that */ unsigned int context = bfin_read_IPEND(); if (oops_in_progress) verbose_printk(KERN_EMERG "Kernel OOPS in progress\n"); if (context & 0x0020 && (fp->seqstat & SEQSTAT_EXCAUSE) == VEC_HWERR) verbose_printk(KERN_NOTICE "HW Error context\n"); else if (context & 0x0020) verbose_printk(KERN_NOTICE "Deferred Exception context\n"); else if (context & 0x3FC0) verbose_printk(KERN_NOTICE "Interrupt context\n"); else if (context & 0x4000) verbose_printk(KERN_NOTICE "Deferred Interrupt context\n"); else if (context & 0x8000) verbose_printk(KERN_NOTICE "Kernel process context\n"); /* Because we are crashing, and pointers could be bad, we check things * pretty closely before we use them */ if ((unsigned long)current >= FIXED_CODE_START && !((unsigned long)current & 0x3) && current->pid) { verbose_printk(KERN_NOTICE "CURRENT PROCESS:\n"); if (current->comm >= (char *)FIXED_CODE_START) verbose_printk(KERN_NOTICE "COMM=%s PID=%d\n", current->comm, current->pid); else verbose_printk(KERN_NOTICE "COMM= invalid\n"); printk(KERN_NOTICE "CPU = %d\n", current_thread_info()->cpu); if (!((unsigned long)current->mm & 0x3) && (unsigned long)current->mm >= FIXED_CODE_START) verbose_printk(KERN_NOTICE "TEXT = 0x%p-0x%p DATA = 0x%p-0x%p\n" KERN_NOTICE " BSS = 0x%p-0x%p USER-STACK = 0x%p\n" KERN_NOTICE "\n", (void *)current->mm->start_code, (void *)current->mm->end_code, (void *)current->mm->start_data, (void *)current->mm->end_data, (void *)current->mm->end_data, (void *)current->mm->brk, (void *)current->mm->start_stack); else verbose_printk(KERN_NOTICE "invalid mm\n"); } else verbose_printk(KERN_NOTICE "\n" KERN_NOTICE "No Valid process in current context\n"); #endif }
static void decode_instruction(unsigned short *address) { unsigned short opcode; if (get_instruction(&opcode, address)) { if (opcode == 0x0010) verbose_printk("RTS"); else if (opcode == 0x0011) verbose_printk("RTI"); else if (opcode == 0x0012) verbose_printk("RTX"); else if (opcode == 0x0013) verbose_printk("RTN"); else if (opcode == 0x0014) verbose_printk("RTE"); else if (opcode == 0x0025) verbose_printk("EMUEXCPT"); else if (opcode == 0x0040 && opcode <= 0x0047) verbose_printk("STI R%i", opcode & 7); else if (opcode >= 0x0050 && opcode <= 0x0057) verbose_printk("JUMP (P%i)", opcode & 7); else if (opcode >= 0x0060 && opcode <= 0x0067) verbose_printk("CALL (P%i)", opcode & 7); else if (opcode >= 0x0070 && opcode <= 0x0077) verbose_printk("CALL (PC+P%i)", opcode & 7); else if (opcode >= 0x0080 && opcode <= 0x0087) verbose_printk("JUMP (PC+P%i)", opcode & 7); else if (opcode >= 0x0090 && opcode <= 0x009F) verbose_printk("RAISE 0x%x", opcode & 0xF); else if (opcode >= 0x00A0 && opcode <= 0x00AF) verbose_printk("EXCPT 0x%x", opcode & 0xF); else if ((opcode >= 0x1000 && opcode <= 0x13FF) || (opcode >= 0x1800 && opcode <= 0x1BFF)) verbose_printk("IF !CC JUMP"); else if ((opcode >= 0x1400 && opcode <= 0x17ff) || (opcode >= 0x1c00 && opcode <= 0x1fff)) verbose_printk("IF CC JUMP"); else if (opcode >= 0x2000 && opcode <= 0x2fff) verbose_printk("JUMP.S"); else if (opcode >= 0xe080 && opcode <= 0xe0ff) verbose_printk("LSETUP"); else if (opcode >= 0xe200 && opcode <= 0xe2ff) verbose_printk("JUMP.L"); else if (opcode >= 0xe300 && opcode <= 0xe3ff) verbose_printk("CALL pcrel"); else verbose_printk("0x%04x", opcode); } }
asmlinkage void trap_c(struct pt_regs *fp) { #ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON int j; #endif #ifdef CONFIG_DEBUG_HUNT_FOR_ZERO unsigned int cpu = smp_processor_id(); #endif int sig = 0; siginfo_t info; unsigned long trapnr = fp->seqstat & SEQSTAT_EXCAUSE; trace_buffer_save(j); /* Important - be very careful dereferncing pointers - will lead to * double faults if the stack has become corrupt */ /* If the fault was caused by a kernel thread, or interrupt handler * we will kernel panic, so the system reboots. * If KGDB is enabled, don't set this for kernel breakpoints */ /* TODO: check to see if we are in some sort of deferred HWERR * that we should be able to recover from, not kernel panic */ if ((bfin_read_IPEND() & 0xFFC0) && (trapnr != VEC_STEP) #ifdef CONFIG_KGDB && (trapnr != VEC_EXCPT02) #endif ){ console_verbose(); oops_in_progress = 1; } else if (current) { if (current->mm == NULL) { console_verbose(); oops_in_progress = 1; } } /* trap_c() will be called for exceptions. During exceptions * processing, the pc value should be set with retx value. * With this change we can cleanup some code in signal.c- TODO */ fp->orig_pc = fp->retx; /* printk("exception: 0x%x, ipend=%x, reti=%x, retx=%x\n", trapnr, fp->ipend, fp->pc, fp->retx); */ /* send the appropriate signal to the user program */ switch (trapnr) { /* This table works in conjuction with the one in ./mach-common/entry.S * Some exceptions are handled there (in assembly, in exception space) * Some are handled here, (in C, in interrupt space) * Some, like CPLB, are handled in both, where the normal path is * handled in assembly/exception space, and the error path is handled * here */ /* 0x00 - Linux Syscall, getting here is an error */ /* 0x01 - userspace gdb breakpoint, handled here */ case VEC_EXCPT01: info.si_code = TRAP_ILLTRAP; sig = SIGTRAP; CHK_DEBUGGER_TRAP_MAYBE(); /* Check if this is a breakpoint in kernel space */ if (fp->ipend & 0xffc0) return; else break; /* 0x03 - User Defined, userspace stack overflow */ case VEC_EXCPT03: info.si_code = SEGV_STACKFLOW; sig = SIGSEGV; verbose_printk(KERN_NOTICE EXC_0x03(KERN_NOTICE)); CHK_DEBUGGER_TRAP_MAYBE(); break; /* 0x02 - KGDB initial connection and break signal trap */ case VEC_EXCPT02: #ifdef CONFIG_KGDB info.si_code = TRAP_ILLTRAP; sig = SIGTRAP; CHK_DEBUGGER_TRAP(); return; #endif /* 0x04 - User Defined */ /* 0x05 - User Defined */ /* 0x06 - User Defined */ /* 0x07 - User Defined */ /* 0x08 - User Defined */ /* 0x09 - User Defined */ /* 0x0A - User Defined */ /* 0x0B - User Defined */ /* 0x0C - User Defined */ /* 0x0D - User Defined */ /* 0x0E - User Defined */ /* 0x0F - User Defined */ /* If we got here, it is most likely that someone was trying to use a * custom exception handler, and it is not actually installed properly */ case VEC_EXCPT04 ... VEC_EXCPT15: info.si_code = ILL_ILLPARAOP; sig = SIGILL; verbose_printk(KERN_NOTICE EXC_0x04(KERN_NOTICE)); CHK_DEBUGGER_TRAP_MAYBE(); break; /* 0x10 HW Single step, handled here */ case VEC_STEP: info.si_code = TRAP_STEP; sig = SIGTRAP; CHK_DEBUGGER_TRAP_MAYBE(); /* Check if this is a single step in kernel space */ if (fp->ipend & 0xffc0) return; else break; /* 0x11 - Trace Buffer Full, handled here */ case VEC_OVFLOW: info.si_code = TRAP_TRACEFLOW; sig = SIGTRAP; verbose_printk(KERN_NOTICE EXC_0x11(KERN_NOTICE)); CHK_DEBUGGER_TRAP_MAYBE(); break; /* 0x12 - Reserved, Caught by default */ /* 0x13 - Reserved, Caught by default */ /* 0x14 - Reserved, Caught by default */ /* 0x15 - Reserved, Caught by default */ /* 0x16 - Reserved, Caught by default */ /* 0x17 - Reserved, Caught by default */ /* 0x18 - Reserved, Caught by default */ /* 0x19 - Reserved, Caught by default */ /* 0x1A - Reserved, Caught by default */ /* 0x1B - Reserved, Caught by default */ /* 0x1C - Reserved, Caught by default */ /* 0x1D - Reserved, Caught by default */ /* 0x1E - Reserved, Caught by default */ /* 0x1F - Reserved, Caught by default */ /* 0x20 - Reserved, Caught by default */ /* 0x21 - Undefined Instruction, handled here */ case VEC_UNDEF_I: info.si_code = ILL_ILLOPC; sig = SIGILL; verbose_printk(KERN_NOTICE EXC_0x21(KERN_NOTICE)); CHK_DEBUGGER_TRAP_MAYBE(); break; /* 0x22 - Illegal Instruction Combination, handled here */ case VEC_ILGAL_I: info.si_code = ILL_ILLPARAOP; sig = SIGILL; verbose_printk(KERN_NOTICE EXC_0x22(KERN_NOTICE)); CHK_DEBUGGER_TRAP_MAYBE(); break; /* 0x23 - Data CPLB protection violation, handled here */ case VEC_CPLB_VL: info.si_code = ILL_CPLB_VI; sig = SIGBUS; verbose_printk(KERN_NOTICE EXC_0x23(KERN_NOTICE)); CHK_DEBUGGER_TRAP_MAYBE(); break; /* 0x24 - Data access misaligned, handled here */ case VEC_MISALI_D: info.si_code = BUS_ADRALN; sig = SIGBUS; verbose_printk(KERN_NOTICE EXC_0x24(KERN_NOTICE)); CHK_DEBUGGER_TRAP_MAYBE(); break; /* 0x25 - Unrecoverable Event, handled here */ case VEC_UNCOV: info.si_code = ILL_ILLEXCPT; sig = SIGILL; verbose_printk(KERN_NOTICE EXC_0x25(KERN_NOTICE)); CHK_DEBUGGER_TRAP_MAYBE(); break; /* 0x26 - Data CPLB Miss, normal case is handled in _cplb_hdr, error case is handled here */ case VEC_CPLB_M: info.si_code = BUS_ADRALN; sig = SIGBUS; verbose_printk(KERN_NOTICE EXC_0x26(KERN_NOTICE)); break; /* 0x27 - Data CPLB Multiple Hits - Linux Trap Zero, handled here */ case VEC_CPLB_MHIT: info.si_code = ILL_CPLB_MULHIT; sig = SIGSEGV; #ifdef CONFIG_DEBUG_HUNT_FOR_ZERO if (cpu_pda[cpu].dcplb_fault_addr < FIXED_CODE_START) verbose_printk(KERN_NOTICE "NULL pointer access\n"); else #endif verbose_printk(KERN_NOTICE EXC_0x27(KERN_NOTICE)); CHK_DEBUGGER_TRAP_MAYBE(); break; /* 0x28 - Emulation Watchpoint, handled here */ case VEC_WATCH: info.si_code = TRAP_WATCHPT; sig = SIGTRAP; pr_debug(EXC_0x28(KERN_DEBUG)); CHK_DEBUGGER_TRAP_MAYBE(); /* Check if this is a watchpoint in kernel space */ if (fp->ipend & 0xffc0) return; else break; #ifdef CONFIG_BF535 /* 0x29 - Instruction fetch access error (535 only) */ case VEC_ISTRU_VL: /* ADSP-BF535 only (MH) */ info.si_code = BUS_OPFETCH; sig = SIGBUS; verbose_printk(KERN_NOTICE "BF535: VEC_ISTRU_VL\n"); CHK_DEBUGGER_TRAP_MAYBE(); break; #else /* 0x29 - Reserved, Caught by default */ #endif /* 0x2A - Instruction fetch misaligned, handled here */ case VEC_MISALI_I: info.si_code = BUS_ADRALN; sig = SIGBUS; verbose_printk(KERN_NOTICE EXC_0x2A(KERN_NOTICE)); CHK_DEBUGGER_TRAP_MAYBE(); break; /* 0x2B - Instruction CPLB protection violation, handled here */ case VEC_CPLB_I_VL: info.si_code = ILL_CPLB_VI; sig = SIGBUS; verbose_printk(KERN_NOTICE EXC_0x2B(KERN_NOTICE)); CHK_DEBUGGER_TRAP_MAYBE(); break; /* 0x2C - Instruction CPLB miss, handled in _cplb_hdr */ case VEC_CPLB_I_M: info.si_code = ILL_CPLB_MISS; sig = SIGBUS; verbose_printk(KERN_NOTICE EXC_0x2C(KERN_NOTICE)); break; /* 0x2D - Instruction CPLB Multiple Hits, handled here */ case VEC_CPLB_I_MHIT: info.si_code = ILL_CPLB_MULHIT; sig = SIGSEGV; #ifdef CONFIG_DEBUG_HUNT_FOR_ZERO if (cpu_pda[cpu].icplb_fault_addr < FIXED_CODE_START) verbose_printk(KERN_NOTICE "Jump to NULL address\n"); else #endif verbose_printk(KERN_NOTICE EXC_0x2D(KERN_NOTICE)); CHK_DEBUGGER_TRAP_MAYBE(); break; /* 0x2E - Illegal use of Supervisor Resource, handled here */ case VEC_ILL_RES: info.si_code = ILL_PRVOPC; sig = SIGILL; verbose_printk(KERN_NOTICE EXC_0x2E(KERN_NOTICE)); CHK_DEBUGGER_TRAP_MAYBE(); break; /* 0x2F - Reserved, Caught by default */ /* 0x30 - Reserved, Caught by default */ /* 0x31 - Reserved, Caught by default */ /* 0x32 - Reserved, Caught by default */ /* 0x33 - Reserved, Caught by default */ /* 0x34 - Reserved, Caught by default */ /* 0x35 - Reserved, Caught by default */ /* 0x36 - Reserved, Caught by default */ /* 0x37 - Reserved, Caught by default */ /* 0x38 - Reserved, Caught by default */ /* 0x39 - Reserved, Caught by default */ /* 0x3A - Reserved, Caught by default */ /* 0x3B - Reserved, Caught by default */ /* 0x3C - Reserved, Caught by default */ /* 0x3D - Reserved, Caught by default */ /* 0x3E - Reserved, Caught by default */ /* 0x3F - Reserved, Caught by default */ case VEC_HWERR: info.si_code = BUS_ADRALN; sig = SIGBUS; switch (fp->seqstat & SEQSTAT_HWERRCAUSE) { /* System MMR Error */ case (SEQSTAT_HWERRCAUSE_SYSTEM_MMR): info.si_code = BUS_ADRALN; sig = SIGBUS; verbose_printk(KERN_NOTICE HWC_x2(KERN_NOTICE)); break; /* External Memory Addressing Error */ case (SEQSTAT_HWERRCAUSE_EXTERN_ADDR): info.si_code = BUS_ADRERR; sig = SIGBUS; verbose_printk(KERN_NOTICE HWC_x3(KERN_NOTICE)); break; /* Performance Monitor Overflow */ case (SEQSTAT_HWERRCAUSE_PERF_FLOW): verbose_printk(KERN_NOTICE HWC_x12(KERN_NOTICE)); break; /* RAISE 5 instruction */ case (SEQSTAT_HWERRCAUSE_RAISE_5): printk(KERN_NOTICE HWC_x18(KERN_NOTICE)); break; default: /* Reserved */ printk(KERN_NOTICE HWC_default(KERN_NOTICE)); break; } CHK_DEBUGGER_TRAP_MAYBE(); break; /* * We should be handling all known exception types above, * if we get here we hit a reserved one, so panic */ default: oops_in_progress = 1; info.si_code = ILL_ILLPARAOP; sig = SIGILL; verbose_printk(KERN_EMERG "Caught Unhandled Exception, code = %08lx\n", (fp->seqstat & SEQSTAT_EXCAUSE)); CHK_DEBUGGER_TRAP_MAYBE(); break; } BUG_ON(sig == 0); if (sig != SIGTRAP) { dump_bfin_process(fp); dump_bfin_mem(fp); show_regs(fp); /* Print out the trace buffer if it makes sense */ #ifndef CONFIG_DEBUG_BFIN_NO_KERN_HWTRACE if (trapnr == VEC_CPLB_I_M || trapnr == VEC_CPLB_M) verbose_printk(KERN_NOTICE "No trace since you do not have " "CONFIG_DEBUG_BFIN_NO_KERN_HWTRACE enabled\n" KERN_NOTICE "\n"); else #endif dump_bfin_trace_buffer(); if (oops_in_progress) { /* Dump the current kernel stack */ verbose_printk(KERN_NOTICE "\n" KERN_NOTICE "Kernel Stack\n"); show_stack(current, NULL); print_modules(); #ifndef CONFIG_ACCESS_CHECK verbose_printk(KERN_EMERG "Please turn on " "CONFIG_ACCESS_CHECK\n"); #endif panic("Kernel exception"); } else { #ifdef CONFIG_DEBUG_VERBOSE unsigned long *stack; /* Dump the user space stack */ stack = (unsigned long *)rdusp(); verbose_printk(KERN_NOTICE "Userspace Stack\n"); show_stack(NULL, stack); #endif } } #ifdef CONFIG_IPIPE if (!ipipe_trap_notify(fp->seqstat & 0x3f, fp)) #endif { info.si_signo = sig; info.si_errno = 0; info.si_addr = (void __user *)fp->pc; force_sig_info(sig, &info, current); } trace_buffer_restore(j); return; }
asmlinkage notrace void trap_c(struct pt_regs *fp) { #ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON int j; #endif #ifdef CONFIG_BFIN_PSEUDODBG_INSNS int opcode; #endif unsigned int cpu = raw_smp_processor_id(); const char *strerror = NULL; int sig = 0; siginfo_t info; unsigned long trapnr = fp->seqstat & SEQSTAT_EXCAUSE; trace_buffer_save(j); #if defined(CONFIG_DEBUG_MMRS) || defined(CONFIG_DEBUG_MMRS_MODULE) last_seqstat = (u32)fp->seqstat; #endif fp->orig_pc = fp->retx; switch (trapnr) { case VEC_EXCPT01: info.si_code = TRAP_ILLTRAP; sig = SIGTRAP; CHK_DEBUGGER_TRAP_MAYBE(); if (kernel_mode_regs(fp)) goto traps_done; else break; case VEC_EXCPT03: info.si_code = SEGV_STACKFLOW; sig = SIGSEGV; strerror = KERN_NOTICE EXC_0x03(KERN_NOTICE); CHK_DEBUGGER_TRAP_MAYBE(); break; case VEC_EXCPT02: #ifdef CONFIG_KGDB info.si_code = TRAP_ILLTRAP; sig = SIGTRAP; CHK_DEBUGGER_TRAP(); goto traps_done; #endif case VEC_EXCPT04 ... VEC_EXCPT15: info.si_code = ILL_ILLPARAOP; sig = SIGILL; strerror = KERN_NOTICE EXC_0x04(KERN_NOTICE); CHK_DEBUGGER_TRAP_MAYBE(); break; case VEC_STEP: info.si_code = TRAP_STEP; sig = SIGTRAP; CHK_DEBUGGER_TRAP_MAYBE(); if (kernel_mode_regs(fp)) goto traps_done; else break; case VEC_OVFLOW: info.si_code = TRAP_TRACEFLOW; sig = SIGTRAP; strerror = KERN_NOTICE EXC_0x11(KERN_NOTICE); CHK_DEBUGGER_TRAP_MAYBE(); break; case VEC_UNDEF_I: #ifdef CONFIG_BUG if (kernel_mode_regs(fp)) { switch (report_bug(fp->pc, fp)) { case BUG_TRAP_TYPE_NONE: break; case BUG_TRAP_TYPE_WARN: dump_bfin_trace_buffer(); fp->pc += 2; goto traps_done; case BUG_TRAP_TYPE_BUG: panic("BUG()"); } } #endif #ifdef CONFIG_BFIN_PSEUDODBG_INSNS if (!kernel_mode_regs(fp) && get_instruction(&opcode, (unsigned short *)fp->pc)) { if (execute_pseudodbg_assert(fp, opcode)) goto traps_done; if (execute_pseudodbg(fp, opcode)) goto traps_done; } #endif info.si_code = ILL_ILLOPC; sig = SIGILL; strerror = KERN_NOTICE EXC_0x21(KERN_NOTICE); CHK_DEBUGGER_TRAP_MAYBE(); break; case VEC_ILGAL_I: info.si_code = ILL_ILLPARAOP; sig = SIGILL; strerror = KERN_NOTICE EXC_0x22(KERN_NOTICE); CHK_DEBUGGER_TRAP_MAYBE(); break; case VEC_CPLB_VL: info.si_code = ILL_CPLB_VI; sig = SIGSEGV; strerror = KERN_NOTICE EXC_0x23(KERN_NOTICE); CHK_DEBUGGER_TRAP_MAYBE(); break; case VEC_MISALI_D: info.si_code = BUS_ADRALN; sig = SIGBUS; strerror = KERN_NOTICE EXC_0x24(KERN_NOTICE); CHK_DEBUGGER_TRAP_MAYBE(); break; case VEC_UNCOV: info.si_code = ILL_ILLEXCPT; sig = SIGILL; strerror = KERN_NOTICE EXC_0x25(KERN_NOTICE); CHK_DEBUGGER_TRAP_MAYBE(); break; case VEC_CPLB_M: info.si_code = BUS_ADRALN; sig = SIGBUS; strerror = KERN_NOTICE EXC_0x26(KERN_NOTICE); break; case VEC_CPLB_MHIT: info.si_code = ILL_CPLB_MULHIT; sig = SIGSEGV; #ifdef CONFIG_DEBUG_HUNT_FOR_ZERO if (cpu_pda[cpu].dcplb_fault_addr < FIXED_CODE_START) strerror = KERN_NOTICE "NULL pointer access\n"; else #endif strerror = KERN_NOTICE EXC_0x27(KERN_NOTICE); CHK_DEBUGGER_TRAP_MAYBE(); break; case VEC_WATCH: info.si_code = TRAP_WATCHPT; sig = SIGTRAP; pr_debug(EXC_0x28(KERN_DEBUG)); CHK_DEBUGGER_TRAP_MAYBE(); if (kernel_mode_regs(fp)) goto traps_done; else break; #ifdef CONFIG_BF535 case VEC_ISTRU_VL: info.si_code = BUS_OPFETCH; sig = SIGBUS; strerror = KERN_NOTICE "BF535: VEC_ISTRU_VL\n"; CHK_DEBUGGER_TRAP_MAYBE(); break; #else #endif case VEC_MISALI_I: info.si_code = BUS_ADRALN; sig = SIGBUS; strerror = KERN_NOTICE EXC_0x2A(KERN_NOTICE); CHK_DEBUGGER_TRAP_MAYBE(); break; case VEC_CPLB_I_VL: info.si_code = ILL_CPLB_VI; sig = SIGBUS; strerror = KERN_NOTICE EXC_0x2B(KERN_NOTICE); CHK_DEBUGGER_TRAP_MAYBE(); break; case VEC_CPLB_I_M: info.si_code = ILL_CPLB_MISS; sig = SIGBUS; strerror = KERN_NOTICE EXC_0x2C(KERN_NOTICE); break; case VEC_CPLB_I_MHIT: info.si_code = ILL_CPLB_MULHIT; sig = SIGSEGV; #ifdef CONFIG_DEBUG_HUNT_FOR_ZERO if (cpu_pda[cpu].icplb_fault_addr < FIXED_CODE_START) strerror = KERN_NOTICE "Jump to NULL address\n"; else #endif strerror = KERN_NOTICE EXC_0x2D(KERN_NOTICE); CHK_DEBUGGER_TRAP_MAYBE(); break; case VEC_ILL_RES: info.si_code = ILL_PRVOPC; sig = SIGILL; strerror = KERN_NOTICE EXC_0x2E(KERN_NOTICE); CHK_DEBUGGER_TRAP_MAYBE(); break; case VEC_HWERR: info.si_code = BUS_ADRALN; sig = SIGBUS; switch (fp->seqstat & SEQSTAT_HWERRCAUSE) { case (SEQSTAT_HWERRCAUSE_SYSTEM_MMR): info.si_code = BUS_ADRALN; sig = SIGBUS; strerror = KERN_NOTICE HWC_x2(KERN_NOTICE); break; case (SEQSTAT_HWERRCAUSE_EXTERN_ADDR): if (ANOMALY_05000310) { static unsigned long anomaly_rets; if ((fp->pc >= (L1_CODE_START + L1_CODE_LENGTH - 512)) && (fp->pc < (L1_CODE_START + L1_CODE_LENGTH))) { anomaly_rets = fp->rets; goto traps_done; } else if (fp->rets == anomaly_rets) { goto traps_done; } else if ((fp->rets >= (L1_CODE_START + L1_CODE_LENGTH - 512)) && (fp->rets < (L1_CODE_START + L1_CODE_LENGTH))) { goto traps_done; } else anomaly_rets = 0; } info.si_code = BUS_ADRERR; sig = SIGBUS; strerror = KERN_NOTICE HWC_x3(KERN_NOTICE); break; case (SEQSTAT_HWERRCAUSE_PERF_FLOW): strerror = KERN_NOTICE HWC_x12(KERN_NOTICE); break; case (SEQSTAT_HWERRCAUSE_RAISE_5): printk(KERN_NOTICE HWC_x18(KERN_NOTICE)); break; default: printk(KERN_NOTICE HWC_default(KERN_NOTICE)); break; } CHK_DEBUGGER_TRAP_MAYBE(); break; default: info.si_code = ILL_ILLPARAOP; sig = SIGILL; verbose_printk(KERN_EMERG "Caught Unhandled Exception, code = %08lx\n", (fp->seqstat & SEQSTAT_EXCAUSE)); CHK_DEBUGGER_TRAP_MAYBE(); break; } BUG_ON(sig == 0); if (kernel_mode_regs(fp) || (current && !current->mm)) { console_verbose(); oops_in_progress = 1; } if (sig != SIGTRAP) { if (strerror) verbose_printk(strerror); dump_bfin_process(fp); dump_bfin_mem(fp); show_regs(fp); #ifndef CONFIG_DEBUG_BFIN_NO_KERN_HWTRACE if (trapnr == VEC_CPLB_I_M || trapnr == VEC_CPLB_M) verbose_printk(KERN_NOTICE "No trace since you do not have " "CONFIG_DEBUG_BFIN_NO_KERN_HWTRACE enabled\n\n"); else #endif dump_bfin_trace_buffer(); if (oops_in_progress) { verbose_printk(KERN_NOTICE "Kernel Stack\n"); show_stack(current, NULL); print_modules(); #ifndef CONFIG_ACCESS_CHECK verbose_printk(KERN_EMERG "Please turn on " "CONFIG_ACCESS_CHECK\n"); #endif panic("Kernel exception"); } else { #ifdef CONFIG_DEBUG_VERBOSE unsigned long *stack; stack = (unsigned long *)rdusp(); verbose_printk(KERN_NOTICE "Userspace Stack\n"); show_stack(NULL, stack); #endif } } #ifdef CONFIG_IPIPE if (!ipipe_trap_notify(fp->seqstat & 0x3f, fp)) #endif { info.si_signo = sig; info.si_errno = 0; switch (trapnr) { case VEC_CPLB_VL: case VEC_MISALI_D: case VEC_CPLB_M: case VEC_CPLB_MHIT: info.si_addr = (void __user *)cpu_pda[cpu].dcplb_fault_addr; break; default: info.si_addr = (void __user *)fp->pc; break; } force_sig_info(sig, &info, current); } if ((ANOMALY_05000461 && trapnr == VEC_HWERR && !access_ok(VERIFY_READ, fp->pc, 8)) || (ANOMALY_05000281 && trapnr == VEC_HWERR) || (ANOMALY_05000189 && (trapnr == VEC_CPLB_I_VL || trapnr == VEC_CPLB_VL))) fp->pc = SAFE_USER_INSTRUCTION; traps_done: trace_buffer_restore(j); }