diff options
Diffstat (limited to 'tools/testing/selftests/bpf/progs/verifier_precision.c')
| -rw-r--r-- | tools/testing/selftests/bpf/progs/verifier_precision.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/verifier_precision.c b/tools/testing/selftests/bpf/progs/verifier_precision.c index 6b564d4c0986..6662d4b39969 100644 --- a/tools/testing/selftests/bpf/progs/verifier_precision.c +++ b/tools/testing/selftests/bpf/progs/verifier_precision.c @@ -2,6 +2,7 @@ /* Copyright (C) 2023 SUSE LLC */ #include <linux/bpf.h> #include <bpf/bpf_helpers.h> +#include "../../../include/linux/filter.h" #include "bpf_misc.h" SEC("?raw_tp") @@ -90,6 +91,54 @@ __naked int bpf_end_bswap(void) ::: __clobber_all); } +#if defined(ENABLE_ATOMICS_TESTS) && \ + (defined(__TARGET_ARCH_arm64) || defined(__TARGET_ARCH_x86)) + +SEC("?raw_tp") +__success __log_level(2) +__msg("mark_precise: frame0: regs=r2 stack= before 3: (bf) r3 = r10") +__msg("mark_precise: frame0: regs=r2 stack= before 2: (db) r2 = load_acquire((u64 *)(r10 -8))") +__msg("mark_precise: frame0: regs= stack=-8 before 1: (7b) *(u64 *)(r10 -8) = r1") +__msg("mark_precise: frame0: regs=r1 stack= before 0: (b7) r1 = 8") +__naked int bpf_load_acquire(void) +{ + asm volatile ( + "r1 = 8;" + "*(u64 *)(r10 - 8) = r1;" + ".8byte %[load_acquire_insn];" /* r2 = load_acquire((u64 *)(r10 - 8)); */ + "r3 = r10;" + "r3 += r2;" /* mark_precise */ + "r0 = 0;" + "exit;" + : + : __imm_insn(load_acquire_insn, + BPF_ATOMIC_OP(BPF_DW, BPF_LOAD_ACQ, BPF_REG_2, BPF_REG_10, -8)) + : __clobber_all); +} + +SEC("?raw_tp") +__success __log_level(2) +__msg("mark_precise: frame0: regs=r1 stack= before 3: (bf) r2 = r10") +__msg("mark_precise: frame0: regs=r1 stack= before 2: (79) r1 = *(u64 *)(r10 -8)") +__msg("mark_precise: frame0: regs= stack=-8 before 1: (db) store_release((u64 *)(r10 -8), r1)") +__msg("mark_precise: frame0: regs=r1 stack= before 0: (b7) r1 = 8") +__naked int bpf_store_release(void) +{ + asm volatile ( + "r1 = 8;" + ".8byte %[store_release_insn];" /* store_release((u64 *)(r10 - 8), r1); */ + "r1 = *(u64 *)(r10 - 8);" + "r2 = r10;" + "r2 += r1;" /* mark_precise */ + "r0 = 0;" + "exit;" + : + : __imm_insn(store_release_insn, + BPF_ATOMIC_OP(BPF_DW, BPF_STORE_REL, BPF_REG_10, BPF_REG_1, -8)) + : __clobber_all); +} + +#endif /* load-acquire, store-release */ #endif /* v4 instruction */ SEC("?raw_tp") |