void microblaze_unwind()

in kernel/unwind.c [273:308]

• 31 lines of code
• 3 McCabe index (conditional complexity)

void microblaze_unwind(struct task_struct *task, struct stack_trace *trace,
		       const char *loglvl)
{
	if (task) {
		if (task == current) {
			const struct pt_regs *regs = task_pt_regs(task);
			microblaze_unwind_inner(task, regs->pc, regs->r1,
						regs->r15, trace, loglvl);
		} else {
			struct thread_info *thread_info =
				(struct thread_info *)(task->stack);
			const struct cpu_context *cpu_context =
				&thread_info->cpu_context;

			microblaze_unwind_inner(task,
						(unsigned long) &_switch_to,
						cpu_context->r1,
						cpu_context->r15,
						trace, loglvl);
		}
	} else {
		unsigned long pc, fp;

		__asm__ __volatile__ ("or %0, r1, r0" : "=r" (fp));

		__asm__ __volatile__ (
			"brlid %0, 0f;"
			"nop;"
			"0:"
			: "=r" (pc)
		);

		/* Since we are not a leaf function, use leaf_return = 0 */
		microblaze_unwind_inner(current, pc, fp, 0, trace, loglvl);
	}
}