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| author |   Daniel Borkmann <daniel@iogearbox.net> | 2018-05-14 23:22:34 +0200 |
|---|---|---|
| committer |   Alexei Starovoitov <ast@kernel.org> | 2018-05-14 19:11:45 -0700 |
| commit | a82d8cd398716b41f0fbe3882e3fe3f5ccf9f9cf (patch) | |
| tree | 0febd11729744b0eb50eae2ba198d80f7a6d05ac /tools/testing/selftests/bpf/test_verifier.c | |
| parent | bpf, arm64: save 4 bytes in prologue when ebpf insns came from cbpf (diff) | |
| download | linux-dev-a82d8cd398716b41f0fbe3882e3fe3f5ccf9f9cf.tar.xz linux-dev-a82d8cd398716b41f0fbe3882e3fe3f5ccf9f9cf.zip | |
bpf: add ld64 imm test cases
Add test cases where we combine semi-random imm values, mainly for testing
JITs when they have different encoding options for 64 bit immediates in
order to reduce resulting image size.
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'tools/testing/selftests/bpf/test_verifier.c')
| -rw-r--r-- | tools/testing/selftests/bpf/test_verifier.c | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/test_verifier.c b/tools/testing/selftests/bpf/test_verifier.c index 275b4570b5b8..a877af00605d 100644 --- a/tools/testing/selftests/bpf/test_verifier.c +++ b/tools/testing/selftests/bpf/test_verifier.c @@ -41,6 +41,7 @@ # endif #endif #include "bpf_rlimit.h" +#include "bpf_rand.h" #include "../../../include/linux/filter.h" #ifndef ARRAY_SIZE @@ -152,6 +153,30 @@ static void bpf_fill_jump_around_ld_abs(struct bpf_test *self) insn[i] = BPF_EXIT_INSN(); } +static void bpf_fill_rand_ld_dw(struct bpf_test *self) +{ + struct bpf_insn *insn = self->insns; + uint64_t res = 0; + int i = 0; + + insn[i++] = BPF_MOV32_IMM(BPF_REG_0, 0); + while (i < self->retval) { + uint64_t val = bpf_semi_rand_get(); + struct bpf_insn tmp[2] = { BPF_LD_IMM64(BPF_REG_1, val) }; + + res ^= val; + insn[i++] = tmp[0]; + insn[i++] = tmp[1]; + insn[i++] = BPF_ALU64_REG(BPF_XOR, BPF_REG_0, BPF_REG_1); + } + insn[i++] = BPF_MOV64_REG(BPF_REG_1, BPF_REG_0); + insn[i++] = BPF_ALU64_IMM(BPF_RSH, BPF_REG_1, 32); + insn[i++] = BPF_ALU64_REG(BPF_XOR, BPF_REG_0, BPF_REG_1); + insn[i] = BPF_EXIT_INSN(); + res ^= (res >> 32); + self->retval = (uint32_t)res; +} + static struct bpf_test tests[] = { { "add+sub+mul", @@ -11974,6 +11999,42 @@ static struct bpf_test tests[] = { .result = ACCEPT, .retval = 10, }, + { + "ld_dw: xor semi-random 64 bit imms, test 1", + .insns = { }, + .data = { }, + .fill_helper = bpf_fill_rand_ld_dw, + .prog_type = BPF_PROG_TYPE_SCHED_CLS, + .result = ACCEPT, + .retval = 4090, + }, + { + "ld_dw: xor semi-random 64 bit imms, test 2", + .insns = { }, + .data = { }, + .fill_helper = bpf_fill_rand_ld_dw, + .prog_type = BPF_PROG_TYPE_SCHED_CLS, + .result = ACCEPT, + .retval = 2047, + }, + { + "ld_dw: xor semi-random 64 bit imms, test 3", + .insns = { }, + .data = { }, + .fill_helper = bpf_fill_rand_ld_dw, + .prog_type = BPF_PROG_TYPE_SCHED_CLS, + .result = ACCEPT, + .retval = 511, + }, + { + "ld_dw: xor semi-random 64 bit imms, test 4", + .insns = { }, + .data = { }, + .fill_helper = bpf_fill_rand_ld_dw, + .prog_type = BPF_PROG_TYPE_SCHED_CLS, + .result = ACCEPT, + .retval = 5, + }, }; static int probe_filter_length(const struct bpf_insn *fp) @@ -12346,5 +12407,6 @@ int main(int argc, char **argv) return EXIT_FAILURE; } + bpf_semi_rand_init(); return do_test(unpriv, from, to); } |