From: Anton Blanchard Here are some changes to the oops printout, stuff that would have been useful when I was chasing various bugs. - print out instructions around the fail (3/4 before 1/4 after). - print out CTR and CR registers, make some space by cutting down XER (its only 32bit) - always print the DAR and DSISR, its sometimes useful - print_modules() like x86 Signed-off-by: Anton Blanchard Signed-off-by: Andrew Morton --- 25-akpm/arch/ppc64/kernel/process.c | 48 +++++++++++++++++++++++++++++++----- 25-akpm/arch/ppc64/kernel/traps.c | 1 2 files changed, 43 insertions(+), 6 deletions(-) diff -puN arch/ppc64/kernel/process.c~ppc64-enhance-oops-printing arch/ppc64/kernel/process.c --- 25/arch/ppc64/kernel/process.c~ppc64-enhance-oops-printing 2005-01-10 19:59:16.770129504 -0800 +++ 25-akpm/arch/ppc64/kernel/process.c 2005-01-10 19:59:16.777128440 -0800 @@ -214,23 +214,57 @@ struct task_struct *__switch_to(struct t return last; } +static int instructions_to_print = 16; + +static void show_instructions(struct pt_regs *regs) +{ + int i; + unsigned long pc = regs->nip - (instructions_to_print * 3 / 4 * + sizeof(int)); + + printk("Instruction dump:"); + + for (i = 0; i < instructions_to_print; i++) { + int instr; + + if (!(i % 8)) + printk("\n"); + + if (((REGION_ID(pc) != KERNEL_REGION_ID) && + (REGION_ID(pc) != VMALLOC_REGION_ID)) || + __get_user(instr, (unsigned int *)pc)) { + printk("XXXXXXXX "); + } else { + if (regs->nip == pc) + printk("<%08x> ", instr); + else + printk("%08x ", instr); + } + + pc += sizeof(int); + } + + printk("\n"); +} + void show_regs(struct pt_regs * regs) { int i; unsigned long trap; - printk("NIP: %016lX XER: %016lX LR: %016lX\n", - regs->nip, regs->xer, regs->link); + printk("NIP: %016lX XER: %08X LR: %016lX CTR: %016lX\n", + regs->nip, (unsigned int)regs->xer, regs->link, regs->ctr); printk("REGS: %p TRAP: %04lx %s (%s)\n", regs, regs->trap, print_tainted(), UTS_RELEASE); - printk("MSR: %016lx EE: %01x PR: %01x FP: %01x ME: %01x IR/DR: %01x%01x\n", + printk("MSR: %016lx EE: %01x PR: %01x FP: %01x ME: %01x " + "IR/DR: %01x%01x CR: %08X\n", regs->msr, regs->msr&MSR_EE ? 1 : 0, regs->msr&MSR_PR ? 1 : 0, regs->msr & MSR_FP ? 1 : 0,regs->msr&MSR_ME ? 1 : 0, regs->msr&MSR_IR ? 1 : 0, - regs->msr&MSR_DR ? 1 : 0); + regs->msr&MSR_DR ? 1 : 0, + (unsigned int)regs->ccr); trap = TRAP(regs); - if (trap == 0x300 || trap == 0x380 || trap == 0x600) - printk("DAR: %016lx, DSISR: %016lx\n", regs->dar, regs->dsisr); + printk("DAR: %016lx DSISR: %016lx\n", regs->dar, regs->dsisr); printk("TASK: %p[%d] '%s' THREAD: %p", current, current->pid, current->comm, current->thread_info); @@ -257,6 +291,8 @@ void show_regs(struct pt_regs * regs) printk("LR [%016lx] ", regs->link); print_symbol("%s\n", regs->link); show_stack(current, (unsigned long *)regs->gpr[1]); + if (!user_mode(regs)) + show_instructions(regs); } void exit_thread(void) diff -puN arch/ppc64/kernel/traps.c~ppc64-enhance-oops-printing arch/ppc64/kernel/traps.c --- 25/arch/ppc64/kernel/traps.c~ppc64-enhance-oops-printing 2005-01-10 19:59:16.772129200 -0800 +++ 25-akpm/arch/ppc64/kernel/traps.c 2005-01-10 19:59:16.778128288 -0800 @@ -127,6 +127,7 @@ int die(const char *str, struct pt_regs } if (nl) printk("\n"); + print_modules(); show_regs(regs); bust_spinlocks(0); spin_unlock_irq(&die_lock); _