static int restore_usr_regs()

in kernel/signal.c [141:184]

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

static int restore_usr_regs(struct pt_regs *regs, struct rt_sigframe __user *sf)
{
	sigset_t set;
	int err;
	struct user_regs_struct uregs;

	err = __copy_from_user(&set, &sf->uc.uc_sigmask, sizeof(set));
	err |= __copy_from_user(&uregs.scratch,
				&(sf->uc.uc_mcontext.regs.scratch),
				sizeof(sf->uc.uc_mcontext.regs.scratch));

	if (is_isa_arcv2())
		err |= restore_arcv2_regs(&(sf->uc.uc_mcontext), regs);

	if (err)
		return -EFAULT;

	set_current_blocked(&set);
	regs->bta	= uregs.scratch.bta;
	regs->lp_start	= uregs.scratch.lp_start;
	regs->lp_end	= uregs.scratch.lp_end;
	regs->lp_count	= uregs.scratch.lp_count;
	regs->status32	= uregs.scratch.status32;
	regs->ret	= uregs.scratch.ret;
	regs->blink	= uregs.scratch.blink;
	regs->fp	= uregs.scratch.fp;
	regs->r26	= uregs.scratch.gp;
	regs->r12	= uregs.scratch.r12;
	regs->r11	= uregs.scratch.r11;
	regs->r10	= uregs.scratch.r10;
	regs->r9	= uregs.scratch.r9;
	regs->r8	= uregs.scratch.r8;
	regs->r7	= uregs.scratch.r7;
	regs->r6	= uregs.scratch.r6;
	regs->r5	= uregs.scratch.r5;
	regs->r4	= uregs.scratch.r4;
	regs->r3	= uregs.scratch.r3;
	regs->r2	= uregs.scratch.r2;
	regs->r1	= uregs.scratch.r1;
	regs->r0	= uregs.scratch.r0;
	regs->sp	= uregs.scratch.sp;

	return 0;
}