diff options
Diffstat (limited to 'tools/testing/selftests/bpf/progs/verifier_jit_convergence.c')
-rw-r--r-- | tools/testing/selftests/bpf/progs/verifier_jit_convergence.c | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/verifier_jit_convergence.c b/tools/testing/selftests/bpf/progs/verifier_jit_convergence.c new file mode 100644 index 000000000000..9f3f2b7db450 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/verifier_jit_convergence.c @@ -0,0 +1,114 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2024 Meta Platforms, Inc. and affiliates. */ + +#include <linux/bpf.h> +#include <bpf/bpf_helpers.h> +#include "bpf_misc.h" + +struct value_t { + long long a[32]; +}; + +struct { + __uint(type, BPF_MAP_TYPE_HASH); + __uint(max_entries, 1); + __type(key, long long); + __type(value, struct value_t); +} map_hash SEC(".maps"); + +SEC("socket") +__description("bpf_jit_convergence je <-> jmp") +__success __retval(0) +__arch_x86_64 +__jited(" pushq %rbp") +__naked void btf_jit_convergence_je_jmp(void) +{ + asm volatile ( + "call %[bpf_get_prandom_u32];" + "if r0 == 0 goto l20_%=;" + "if r0 == 1 goto l21_%=;" + "if r0 == 2 goto l22_%=;" + "if r0 == 3 goto l23_%=;" + "if r0 == 4 goto l24_%=;" + "call %[bpf_get_prandom_u32];" + "call %[bpf_get_prandom_u32];" +"l20_%=:" +"l21_%=:" +"l22_%=:" +"l23_%=:" +"l24_%=:" + "r1 = 0;" + "*(u64 *)(r10 - 8) = r1;" + "r2 = r10;" + "r2 += -8;" + "r1 = %[map_hash] ll;" + "call %[bpf_map_lookup_elem];" + "if r0 == 0 goto l1_%=;" + "r6 = r0;" + "call %[bpf_get_prandom_u32];" + "r7 = r0;" + "r5 = r6;" + "if r0 != 0x0 goto l12_%=;" + "call %[bpf_get_prandom_u32];" + "r1 = r0;" + "r2 = r6;" + "if r1 == 0x0 goto l0_%=;" +"l9_%=:" + "r2 = *(u64 *)(r6 + 0x0);" + "r2 += 0x1;" + "*(u64 *)(r6 + 0x0) = r2;" + "goto l1_%=;" +"l12_%=:" + "r1 = r7;" + "r1 += 0x98;" + "r2 = r5;" + "r2 += 0x90;" + "r2 = *(u32 *)(r2 + 0x0);" + "r3 = r7;" + "r3 &= 0x1;" + "r2 *= 0xa8;" + "if r3 == 0x0 goto l2_%=;" + "r1 += r2;" + "r1 -= r7;" + "r1 += 0x8;" + "if r1 <= 0xb20 goto l3_%=;" + "r1 = 0x0;" + "goto l4_%=;" +"l3_%=:" + "r1 += r7;" +"l4_%=:" + "if r1 == 0x0 goto l8_%=;" + "goto l9_%=;" +"l2_%=:" + "r1 += r2;" + "r1 -= r7;" + "r1 += 0x10;" + "if r1 <= 0xb20 goto l6_%=;" + "r1 = 0x0;" + "goto l7_%=;" +"l6_%=:" + "r1 += r7;" +"l7_%=:" + "if r1 == 0x0 goto l8_%=;" + "goto l9_%=;" +"l0_%=:" + "r1 = 0x3;" + "*(u64 *)(r10 - 0x10) = r1;" + "r2 = r1;" + "goto l1_%=;" +"l8_%=:" + "r1 = r5;" + "r1 += 0x4;" + "r1 = *(u32 *)(r1 + 0x0);" + "*(u64 *)(r10 - 0x8) = r1;" +"l1_%=:" + "r0 = 0;" + "exit;" + : + : __imm(bpf_get_prandom_u32), + __imm(bpf_map_lookup_elem), + __imm_addr(map_hash) + : __clobber_all); +} + +char _license[] SEC("license") = "GPL"; |