35 void Ld(State* state, const struct sock_filter& insn, const char** err) {  in Ld()  argument
36   if (BPF_SIZE(insn.code) != BPF_W || BPF_MODE(insn.code) != BPF_ABS ||  in Ld()
37       insn.jt != 0 || insn.jf != 0) {  in Ld()
41   if (insn.k < sizeof(struct arch_seccomp_data) && (insn.k & 3) == 0) {  in Ld()
44            reinterpret_cast<const char*>(&state->data) + insn.k, 4);  in Ld()
53 void Jmp(State* state, const struct sock_filter& insn, const char** err) {  in Jmp()  argument
54   if (BPF_OP(insn.code) == BPF_JA) {  in Jmp()
55     if (state->ip + insn.k + 1 >= state->program.size() ||  in Jmp()
56         state->ip + insn.k + 1 <= state->ip) {  in Jmp()
61     state->ip += insn.k;  in Jmp()
63     if (BPF_SRC(insn.code) != BPF_K || !state->acc_is_valid ||  in Jmp()
64         state->ip + insn.jt + 1 >= state->program.size() ||  in Jmp()
65         state->ip + insn.jf + 1 >= state->program.size()) {  in Jmp()
68     switch (BPF_OP(insn.code)) {  in Jmp()
70         if (state->accumulator == insn.k) {  in Jmp()
71           state->ip += insn.jt;  in Jmp()
73           state->ip += insn.jf;  in Jmp()
77         if (state->accumulator > insn.k) {  in Jmp()
78           state->ip += insn.jt;  in Jmp()
80           state->ip += insn.jf;  in Jmp()
84         if (state->accumulator >= insn.k) {  in Jmp()
85           state->ip += insn.jt;  in Jmp()
87           state->ip += insn.jf;  in Jmp()
91         if (state->accumulator & insn.k) {  in Jmp()
92           state->ip += insn.jt;  in Jmp()
94           state->ip += insn.jf;  in Jmp()
103 uint32_t Ret(State*, const struct sock_filter& insn, const char** err) {  in Ret()  argument
104   if (BPF_SRC(insn.code) != BPF_K) {  in Ret()
108   return insn.k;  in Ret()
111 void Alu(State* state, const struct sock_filter& insn, const char** err) {  in Alu()  argument
112   if (BPF_OP(insn.code) == BPF_NEG) {  in Alu()
116     if (BPF_SRC(insn.code) != BPF_K) {  in Alu()
120     switch (BPF_OP(insn.code)) {  in Alu()
122         state->accumulator += insn.k;  in Alu()
125         state->accumulator -= insn.k;  in Alu()
128         state->accumulator *= insn.k;  in Alu()
131         if (!insn.k) {  in Alu()
135         state->accumulator /= insn.k;  in Alu()
138         if (!insn.k) {  in Alu()
142         state->accumulator %= insn.k;  in Alu()
145         state->accumulator |= insn.k;  in Alu()
148         state->accumulator ^= insn.k;  in Alu()
151         state->accumulator &= insn.k;  in Alu()
154         if (insn.k > 32) {  in Alu()
158         state->accumulator <<= insn.k;  in Alu()
161         if (insn.k > 32) {  in Alu()
165         state->accumulator >>= insn.k;  in Alu()
189     const struct sock_filter& insn = program[state.ip];  in EvaluateBPF()  local
190     switch (BPF_CLASS(insn.code)) {  in EvaluateBPF()
192         Ld(&state, insn, err);  in EvaluateBPF()
195         Jmp(&state, insn, err);  in EvaluateBPF()
198         uint32_t r = Ret(&state, insn, err);  in EvaluateBPF()
214         Alu(&state, insn, err);  in EvaluateBPF()