void show_registers()

in kernel/traps.c [59:121]

• 52 lines of code
• 7 McCabe index (conditional complexity)

void show_registers(struct pt_regs *regs)
{
	int i;
	int in_kernel = 1;
	unsigned long esp;

	esp = (unsigned long)(regs->sp);
	if (user_mode(regs))
		in_kernel = 0;

	printk("CPU #: %d\n"
	       "   PC: %08lx    SR: %08lx    SP: %08lx\n",
	       smp_processor_id(), regs->pc, regs->sr, regs->sp);
	printk("GPR00: %08lx GPR01: %08lx GPR02: %08lx GPR03: %08lx\n",
	       0L, regs->gpr[1], regs->gpr[2], regs->gpr[3]);
	printk("GPR04: %08lx GPR05: %08lx GPR06: %08lx GPR07: %08lx\n",
	       regs->gpr[4], regs->gpr[5], regs->gpr[6], regs->gpr[7]);
	printk("GPR08: %08lx GPR09: %08lx GPR10: %08lx GPR11: %08lx\n",
	       regs->gpr[8], regs->gpr[9], regs->gpr[10], regs->gpr[11]);
	printk("GPR12: %08lx GPR13: %08lx GPR14: %08lx GPR15: %08lx\n",
	       regs->gpr[12], regs->gpr[13], regs->gpr[14], regs->gpr[15]);
	printk("GPR16: %08lx GPR17: %08lx GPR18: %08lx GPR19: %08lx\n",
	       regs->gpr[16], regs->gpr[17], regs->gpr[18], regs->gpr[19]);
	printk("GPR20: %08lx GPR21: %08lx GPR22: %08lx GPR23: %08lx\n",
	       regs->gpr[20], regs->gpr[21], regs->gpr[22], regs->gpr[23]);
	printk("GPR24: %08lx GPR25: %08lx GPR26: %08lx GPR27: %08lx\n",
	       regs->gpr[24], regs->gpr[25], regs->gpr[26], regs->gpr[27]);
	printk("GPR28: %08lx GPR29: %08lx GPR30: %08lx GPR31: %08lx\n",
	       regs->gpr[28], regs->gpr[29], regs->gpr[30], regs->gpr[31]);
	printk("  RES: %08lx oGPR11: %08lx\n",
	       regs->gpr[11], regs->orig_gpr11);

	printk("Process %s (pid: %d, stackpage=%08lx)\n",
	       current->comm, current->pid, (unsigned long)current);
	/*
	 * When in-kernel, we also print out the stack and code at the
	 * time of the fault..
	 */
	if (in_kernel) {

		printk("\nStack: ");
		show_stack(NULL, (unsigned long *)esp, KERN_EMERG);

		printk("\nCode: ");
		if (regs->pc < PAGE_OFFSET)
			goto bad;

		for (i = -24; i < 24; i++) {
			unsigned char c;
			if (__get_user(c, &((unsigned char *)regs->pc)[i])) {
bad:
				printk(" Bad PC value.");
				break;
			}

			if (i == 0)
				printk("(%02x) ", c);
			else
				printk("%02x ", c);
		}
	}
	printk("\n");
}