438 static void bpf_dump_curr(struct bpf_regs *r, struct sock_filter *f)  in bpf_dump_curr()  argument
442 	rl_printf("pc:       [%u]\n", r->Pc);  in bpf_dump_curr()
446 	bpf_disasm(*f, r->Pc);  in bpf_dump_curr()
450 		bpf_disasm(*(f + f->jt + 1), r->Pc + f->jt + 1);  in bpf_dump_curr()
452 		bpf_disasm(*(f + f->jf + 1), r->Pc + f->jf + 1);  in bpf_dump_curr()
455 	rl_printf("A:        [%#08x][%u]\n", r->A, r->A);  in bpf_dump_curr()
456 	rl_printf("X:        [%#08x][%u]\n", r->X, r->X);  in bpf_dump_curr()
457 	if (r->Rs)  in bpf_dump_curr()
458 		rl_printf("ret:      [%#08x][%u]!\n", r->R, r->R);  in bpf_dump_curr()
461 		if (r->M[i]) {  in bpf_dump_curr()
463 			rl_printf("M[%d]: [%#08x][%u]\n", i, r->M[i], r->M[i]);  in bpf_dump_curr()
605 	uint32_t r;  in extract_u32()  local
607 	memcpy(&r, &pkt[off], sizeof(r));  in extract_u32()
609 	return ntohl(r);  in extract_u32()
614 	uint16_t r;  in extract_u16()  local
616 	memcpy(&r, &pkt[off], sizeof(r));  in extract_u16()
618 	return ntohs(r);  in extract_u16()
626 static void set_return(struct bpf_regs *r)  in set_return()  argument
628 	r->R = 0;  in set_return()
629 	r->Rs = true;  in set_return()
632 static void bpf_single_step(struct bpf_regs *r, struct sock_filter *f,  in bpf_single_step()  argument
641 		r->R = K;  in bpf_single_step()
642 		r->Rs = true;  in bpf_single_step()
645 		r->R = r->A;  in bpf_single_step()
646 		r->Rs = true;  in bpf_single_step()
649 		r->R = r->X;  in bpf_single_step()
650 		r->Rs = true;  in bpf_single_step()
653 		r->X = r->A;  in bpf_single_step()
656 		r->A = r->X;  in bpf_single_step()
659 		r->M[K] = r->A;  in bpf_single_step()
662 		r->M[K] = r->X;  in bpf_single_step()
667 			r->A = extract_u32(pkt, K);  in bpf_single_step()
669 			set_return(r);  in bpf_single_step()
674 			r->A = extract_u16(pkt, K);  in bpf_single_step()
676 			set_return(r);  in bpf_single_step()
681 			r->A = extract_u8(pkt, K);  in bpf_single_step()
683 			set_return(r);  in bpf_single_step()
686 		d = pkt_caplen - (r->X + K);  in bpf_single_step()
688 			r->A = extract_u32(pkt, r->X + K);  in bpf_single_step()
691 		d = pkt_caplen - (r->X + K);  in bpf_single_step()
693 			r->A = extract_u16(pkt, r->X + K);  in bpf_single_step()
695 			set_return(r);  in bpf_single_step()
698 		d = pkt_caplen - (r->X + K);  in bpf_single_step()
700 			r->A = extract_u8(pkt, r->X + K);  in bpf_single_step()
702 			set_return(r);  in bpf_single_step()
707 			r->X = extract_u8(pkt, K);  in bpf_single_step()
708 			r->X = (r->X & 0xf) << 2;  in bpf_single_step()
710 			set_return(r);  in bpf_single_step()
713 		r->A = pkt_len;  in bpf_single_step()
716 		r->A = pkt_len;  in bpf_single_step()
719 		r->A = K;  in bpf_single_step()
722 		r->X = K;  in bpf_single_step()
725 		r->A = r->M[K];  in bpf_single_step()
728 		r->X = r->M[K];  in bpf_single_step()
731 		r->Pc += K;  in bpf_single_step()
734 		r->Pc += r->A > r->X ? f->jt : f->jf;  in bpf_single_step()
737 		r->Pc += r->A > K ? f->jt : f->jf;  in bpf_single_step()
740 		r->Pc += r->A >= r->X ? f->jt : f->jf;  in bpf_single_step()
743 		r->Pc += r->A >= K ? f->jt : f->jf;  in bpf_single_step()
746 		r->Pc += r->A == r->X ? f->jt : f->jf;  in bpf_single_step()
749 		r->Pc += r->A == K ? f->jt : f->jf;  in bpf_single_step()
752 		r->Pc += r->A & r->X ? f->jt : f->jf;  in bpf_single_step()
755 		r->Pc += r->A & K ? f->jt : f->jf;  in bpf_single_step()
758 		r->A = -r->A;  in bpf_single_step()
761 		r->A <<= r->X;  in bpf_single_step()
764 		r->A <<= K;  in bpf_single_step()
767 		r->A >>= r->X;  in bpf_single_step()
770 		r->A >>= K;  in bpf_single_step()
773 		r->A += r->X;  in bpf_single_step()
776 		r->A += K;  in bpf_single_step()
779 		r->A -= r->X;  in bpf_single_step()
782 		r->A -= K;  in bpf_single_step()
785 		r->A *= r->X;  in bpf_single_step()
788 		r->A *= K;  in bpf_single_step()
792 		if (r->X == 0) {  in bpf_single_step()
793 			set_return(r);  in bpf_single_step()
800 			set_return(r);  in bpf_single_step()
806 			r->A /= r->X;  in bpf_single_step()
809 			r->A /= K;  in bpf_single_step()
812 			r->A %= r->X;  in bpf_single_step()
815 			r->A %= K;  in bpf_single_step()
820 		r->A &= r->X;  in bpf_single_step()
823 		r->A &= K;  in bpf_single_step()
826 		r->A |= r->X;  in bpf_single_step()
829 		r->A |= K;  in bpf_single_step()
832 		r->A ^= r->X;  in bpf_single_step()
835 		r->A ^= K;  in bpf_single_step()
854 static bool bpf_handle_breakpoint(struct bpf_regs *r, struct sock_filter *f,  in bpf_handle_breakpoint()  argument
859 	bpf_dump_curr(r, &f[r->Pc]);  in bpf_handle_breakpoint()