2 .btf_strings = "\0int\0i\0ctx\0callback\0main\0", \
4 /* 1: int */ BTF_TYPE_INT_ENC(1, BTF_INT_SIGNED, 0, 32, 4), \
5 /* 2: int* */ BTF_PTR_ENC(1), \
6 /* 3: void* */ BTF_PTR_ENC(0), \
7 /* 4: int __(void*) */ BTF_FUNC_PROTO_ENC(1, 1), \
8 BTF_FUNC_PROTO_ARG_ENC(7, 3), \
9 /* 5: int __(int, int*) */ BTF_FUNC_PROTO_ENC(1, 2), \
10 BTF_FUNC_PROTO_ARG_ENC(5, 1), \
11 BTF_FUNC_PROTO_ARG_ENC(7, 2), \
12 /* 6: main */ BTF_FUNC_ENC(20, 4), \
13 /* 7: callback */ BTF_FUNC_ENC(11, 5), \
18 #define CALLBACK_TYPE 7
20 /* can't use BPF_CALL_REL, jit_subprogs adjusts IMM & OFF
21 * fields for pseudo calls
23 #define PSEUDO_CALL_INSN() \
24 BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, BPF_PSEUDO_CALL, \
25 INSN_OFF_MASK, INSN_IMM_MASK)
27 /* can't use BPF_FUNC_loop constant,
28 * do_mix_fixups adjusts the IMM field
30 #define HELPER_CALL_INSN() \
31 BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, INSN_OFF_MASK, INSN_IMM_MASK)
34 "inline simple bpf_loop call",
37 /* force verifier state branching to verify logic on first and
38 * subsequent bpf_loop insn processing steps
40 BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_jiffies64),
41 BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 777, 2),
42 BPF_ALU64_IMM(BPF_MOV, BPF_REG_1, 1),
43 BPF_JMP_IMM(BPF_JA, 0, 0, 1),
44 BPF_ALU64_IMM(BPF_MOV, BPF_REG_1, 2),
46 BPF_RAW_INSN(BPF_LD | BPF_IMM | BPF_DW, BPF_REG_2, BPF_PSEUDO_FUNC, 0, 6),
47 BPF_RAW_INSN(0, 0, 0, 0, 0),
48 BPF_ALU64_IMM(BPF_MOV, BPF_REG_3, 0),
49 BPF_ALU64_IMM(BPF_MOV, BPF_REG_4, 0),
50 BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_loop),
51 BPF_ALU64_IMM(BPF_MOV, BPF_REG_0, 0),
54 BPF_ALU64_IMM(BPF_MOV, BPF_REG_0, 1),
57 .expected_insns = { PSEUDO_CALL_INSN() },
58 .unexpected_insns = { HELPER_CALL_INSN() },
59 .prog_type = BPF_PROG_TYPE_TRACEPOINT,
60 .flags = F_NEEDS_JIT_ENABLED,
63 .func_info = { { 0, MAIN_TYPE }, { 12, CALLBACK_TYPE } },
68 "don't inline bpf_loop call, flags non-zero",
71 BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_jiffies64),
72 BPF_ALU64_REG(BPF_MOV, BPF_REG_6, BPF_REG_0),
73 BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_jiffies64),
74 BPF_ALU64_REG(BPF_MOV, BPF_REG_7, BPF_REG_0),
75 BPF_JMP_IMM(BPF_JNE, BPF_REG_6, 0, 9),
76 BPF_ALU64_IMM(BPF_MOV, BPF_REG_4, 0),
77 BPF_JMP_IMM(BPF_JNE, BPF_REG_7, 0, 0),
78 BPF_ALU64_IMM(BPF_MOV, BPF_REG_1, 1),
79 BPF_RAW_INSN(BPF_LD | BPF_IMM | BPF_DW, BPF_REG_2, BPF_PSEUDO_FUNC, 0, 7),
80 BPF_RAW_INSN(0, 0, 0, 0, 0),
81 BPF_ALU64_IMM(BPF_MOV, BPF_REG_3, 0),
82 BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_loop),
83 BPF_ALU64_IMM(BPF_MOV, BPF_REG_0, 0),
85 BPF_ALU64_IMM(BPF_MOV, BPF_REG_4, 1),
86 BPF_JMP_IMM(BPF_JA, 0, 0, -10),
88 BPF_ALU64_IMM(BPF_MOV, BPF_REG_0, 1),
91 .expected_insns = { HELPER_CALL_INSN() },
92 .unexpected_insns = { PSEUDO_CALL_INSN() },
93 .prog_type = BPF_PROG_TYPE_TRACEPOINT,
94 .flags = F_NEEDS_JIT_ENABLED,
97 .func_info = { { 0, MAIN_TYPE }, { 16, CALLBACK_TYPE } },
102 "don't inline bpf_loop call, callback non-constant",
105 BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_jiffies64),
106 BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 777, 4), /* pick a random callback */
108 BPF_ALU64_IMM(BPF_MOV, BPF_REG_1, 1),
109 BPF_RAW_INSN(BPF_LD | BPF_IMM | BPF_DW, BPF_REG_2, BPF_PSEUDO_FUNC, 0, 10),
110 BPF_RAW_INSN(0, 0, 0, 0, 0),
111 BPF_JMP_IMM(BPF_JA, 0, 0, 3),
113 BPF_ALU64_IMM(BPF_MOV, BPF_REG_1, 1),
114 BPF_RAW_INSN(BPF_LD | BPF_IMM | BPF_DW, BPF_REG_2, BPF_PSEUDO_FUNC, 0, 8),
115 BPF_RAW_INSN(0, 0, 0, 0, 0),
117 BPF_ALU64_IMM(BPF_MOV, BPF_REG_3, 0),
118 BPF_ALU64_IMM(BPF_MOV, BPF_REG_4, 0),
119 BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_loop),
120 BPF_ALU64_IMM(BPF_MOV, BPF_REG_0, 0),
123 BPF_ALU64_IMM(BPF_MOV, BPF_REG_0, 1),
126 BPF_ALU64_IMM(BPF_MOV, BPF_REG_0, 1),
129 .expected_insns = { HELPER_CALL_INSN() },
130 .unexpected_insns = { PSEUDO_CALL_INSN() },
131 .prog_type = BPF_PROG_TYPE_TRACEPOINT,
132 .flags = F_NEEDS_JIT_ENABLED,
137 { 14, CALLBACK_TYPE },
138 { 16, CALLBACK_TYPE }
144 "bpf_loop_inline and a dead func",
148 /* A reference to callback #1 to make verifier count it as a func.
149 * This reference is overwritten below and callback #1 is dead.
151 BPF_RAW_INSN(BPF_LD | BPF_IMM | BPF_DW, BPF_REG_2, BPF_PSEUDO_FUNC, 0, 9),
152 BPF_RAW_INSN(0, 0, 0, 0, 0),
153 BPF_ALU64_IMM(BPF_MOV, BPF_REG_1, 1),
154 BPF_RAW_INSN(BPF_LD | BPF_IMM | BPF_DW, BPF_REG_2, BPF_PSEUDO_FUNC, 0, 8),
155 BPF_RAW_INSN(0, 0, 0, 0, 0),
156 BPF_ALU64_IMM(BPF_MOV, BPF_REG_3, 0),
157 BPF_ALU64_IMM(BPF_MOV, BPF_REG_4, 0),
158 BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_loop),
159 BPF_ALU64_IMM(BPF_MOV, BPF_REG_0, 0),
162 BPF_ALU64_IMM(BPF_MOV, BPF_REG_0, 1),
165 BPF_ALU64_IMM(BPF_MOV, BPF_REG_0, 1),
168 .expected_insns = { PSEUDO_CALL_INSN() },
169 .unexpected_insns = { HELPER_CALL_INSN() },
170 .prog_type = BPF_PROG_TYPE_TRACEPOINT,
171 .flags = F_NEEDS_JIT_ENABLED,
176 { 10, CALLBACK_TYPE },
177 { 12, CALLBACK_TYPE }
183 "bpf_loop_inline stack locations for loop vars",
186 BPF_ST_MEM(BPF_W, BPF_REG_10, -12, 0x77),
187 /* bpf_loop call #1 */
188 BPF_ALU64_IMM(BPF_MOV, BPF_REG_1, 1),
189 BPF_RAW_INSN(BPF_LD | BPF_IMM | BPF_DW, BPF_REG_2, BPF_PSEUDO_FUNC, 0, 22),
190 BPF_RAW_INSN(0, 0, 0, 0, 0),
191 BPF_ALU64_IMM(BPF_MOV, BPF_REG_3, 0),
192 BPF_ALU64_IMM(BPF_MOV, BPF_REG_4, 0),
193 BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_loop),
194 /* bpf_loop call #2 */
195 BPF_ALU64_IMM(BPF_MOV, BPF_REG_1, 2),
196 BPF_RAW_INSN(BPF_LD | BPF_IMM | BPF_DW, BPF_REG_2, BPF_PSEUDO_FUNC, 0, 16),
197 BPF_RAW_INSN(0, 0, 0, 0, 0),
198 BPF_ALU64_IMM(BPF_MOV, BPF_REG_3, 0),
199 BPF_ALU64_IMM(BPF_MOV, BPF_REG_4, 0),
200 BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_loop),
201 /* call func and exit */
203 BPF_ALU64_IMM(BPF_MOV, BPF_REG_0, 0),
206 BPF_ST_MEM(BPF_DW, BPF_REG_10, -32, 0x55),
207 BPF_ALU64_IMM(BPF_MOV, BPF_REG_1, 2),
208 BPF_RAW_INSN(BPF_LD | BPF_IMM | BPF_DW, BPF_REG_2, BPF_PSEUDO_FUNC, 0, 6),
209 BPF_RAW_INSN(0, 0, 0, 0, 0),
210 BPF_ALU64_IMM(BPF_MOV, BPF_REG_3, 0),
211 BPF_ALU64_IMM(BPF_MOV, BPF_REG_4, 0),
212 BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_loop),
213 BPF_ALU64_IMM(BPF_MOV, BPF_REG_0, 0),
216 BPF_ALU64_IMM(BPF_MOV, BPF_REG_0, 1),
220 BPF_ST_MEM(BPF_W, BPF_REG_10, -12, 0x77),
222 BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_6, -40),
223 BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_7, -32),
224 BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_8, -24),
226 /* offsets are the same as in the first call */
227 BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_6, -40),
228 BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_7, -32),
229 BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_8, -24),
231 BPF_ST_MEM(BPF_DW, BPF_REG_10, -32, 0x55),
233 /* offsets differ from main because of different offset
234 * in BPF_ST_MEM instruction
236 BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_6, -56),
237 BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_7, -48),
238 BPF_STX_MEM(BPF_DW, BPF_REG_10, BPF_REG_8, -40),
240 .unexpected_insns = { HELPER_CALL_INSN() },
241 .prog_type = BPF_PROG_TYPE_TRACEPOINT,
242 .flags = F_NEEDS_JIT_ENABLED,
247 { 25, CALLBACK_TYPE },
253 "inline bpf_loop call in a big program",
255 .fill_helper = bpf_fill_big_prog_with_loop_1,
256 .expected_insns = { PSEUDO_CALL_INSN() },
257 .unexpected_insns = { HELPER_CALL_INSN() },
259 .prog_type = BPF_PROG_TYPE_TRACEPOINT,
260 .flags = F_NEEDS_JIT_ENABLED,
261 .func_info = { { 0, MAIN_TYPE }, { 16, CALLBACK_TYPE } },
266 #undef HELPER_CALL_INSN
267 #undef PSEUDO_CALL_INSN