1 // SPDX-License-Identifier: GPL-2.0
5  * Copyright (c) 2012 The Chromium OS Authors <chromium-os-dev@chromium.org>
8  * The code may be used by anyone for any purpose,
17 #include "bpf-helper.h"
25 		return -1;  in bpf_resolve_jumps()
31 		size_t offset = count - i - 1;  in bpf_resolve_jumps()  local
32 		struct sock_filter *instr = &filter[offset];  in bpf_resolve_jumps()
33 		if (instr->code != (BPF_JMP+BPF_JA))  in bpf_resolve_jumps()
35 		switch ((instr->jt<<8)|instr->jf) {  in bpf_resolve_jumps()
37 			if (labels->labels[instr->k].location == 0xffffffff) {  in bpf_resolve_jumps()
39 					labels->labels[instr->k].label);  in bpf_resolve_jumps()
42 			instr->k = labels->labels[instr->k].location -  in bpf_resolve_jumps()
43 				    (offset + 1);  in bpf_resolve_jumps()
44 			instr->jt = 0;  in bpf_resolve_jumps()
45 			instr->jf = 0;  in bpf_resolve_jumps()
48 			if (labels->labels[instr->k].location != 0xffffffff) {  in bpf_resolve_jumps()
50 					labels->labels[instr->k].label);  in bpf_resolve_jumps()
53 			labels->labels[instr->k].location = offset;  in bpf_resolve_jumps()
54 			instr->k = 0; /* fall through */  in bpf_resolve_jumps()
55 			instr->jt = 0;  in bpf_resolve_jumps()
56 			instr->jf = 0;  in bpf_resolve_jumps()
66 	struct __bpf_label *begin = labels->labels, *end;  in seccomp_bpf_label()
69 	if (labels->count == BPF_LABELS_MAX) {  in seccomp_bpf_label()
73 	if (labels->count == 0) {  in seccomp_bpf_label()
74 		begin->label = label;  in seccomp_bpf_label()
75 		begin->location = 0xffffffff;  in seccomp_bpf_label()
76 		labels->count++;  in seccomp_bpf_label()
79 	end = begin + labels->count;  in seccomp_bpf_label()
81 		if (!strcmp(label, begin->label))  in seccomp_bpf_label()
84 	begin->label = label;  in seccomp_bpf_label()
85 	begin->location = 0xffffffff;  in seccomp_bpf_label()
86 	labels->count++;  in seccomp_bpf_label()
94 		printf("{ code=%u,jt=%u,jf=%u,k=%u },\n",  in seccomp_bpf_print()
95 			filter->code, filter->jt, filter->jf, filter->k);  in seccomp_bpf_print()