static int tie_set()

in kernel/ptrace.c [152:189]

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

static int tie_set(struct task_struct *target,
		   const struct user_regset *regset,
		   unsigned int pos, unsigned int count,
		   const void *kbuf, const void __user *ubuf)
{
	int ret;
	struct pt_regs *regs = task_pt_regs(target);
	struct thread_info *ti = task_thread_info(target);
	elf_xtregs_t *newregs = kzalloc(sizeof(elf_xtregs_t), GFP_KERNEL);

	if (!newregs)
		return -ENOMEM;

	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
				 newregs, 0, -1);

	if (ret)
		goto exit;
	regs->xtregs_opt = newregs->opt;
	ti->xtregs_user = newregs->user;

#if XTENSA_HAVE_COPROCESSORS
	/* Flush all coprocessors before we overwrite them. */
	coprocessor_flush_all(ti);
	coprocessor_release_all(ti);
	ti->xtregs_cp.cp0 = newregs->cp0;
	ti->xtregs_cp.cp1 = newregs->cp1;
	ti->xtregs_cp.cp2 = newregs->cp2;
	ti->xtregs_cp.cp3 = newregs->cp3;
	ti->xtregs_cp.cp4 = newregs->cp4;
	ti->xtregs_cp.cp5 = newregs->cp5;
	ti->xtregs_cp.cp6 = newregs->cp6;
	ti->xtregs_cp.cp7 = newregs->cp7;
#endif
exit:
	kfree(newregs);
	return ret;
}