diff options
Diffstat (limited to 'tools/testing/selftests/bpf/progs/test_core_reloc_bitfields_direct.c')
-rw-r--r-- | tools/testing/selftests/bpf/progs/test_core_reloc_bitfields_direct.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/test_core_reloc_bitfields_direct.c b/tools/testing/selftests/bpf/progs/test_core_reloc_bitfields_direct.c new file mode 100644 index 000000000000..edc0f7c9e56d --- /dev/null +++ b/tools/testing/selftests/bpf/progs/test_core_reloc_bitfields_direct.c @@ -0,0 +1,63 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (c) 2019 Facebook + +#include <linux/bpf.h> +#include <stdint.h> +#include "bpf_helpers.h" +#include "bpf_core_read.h" + +char _license[] SEC("license") = "GPL"; + +struct { + char in[256]; + char out[256]; +} data = {}; + +struct core_reloc_bitfields { + /* unsigned bitfields */ + uint8_t ub1: 1; + uint8_t ub2: 2; + uint32_t ub7: 7; + /* signed bitfields */ + int8_t sb4: 4; + int32_t sb20: 20; + /* non-bitfields */ + uint32_t u32; + int32_t s32; +}; + +/* bitfield read results, all as plain integers */ +struct core_reloc_bitfields_output { + int64_t ub1; + int64_t ub2; + int64_t ub7; + int64_t sb4; + int64_t sb20; + int64_t u32; + int64_t s32; +}; + +struct pt_regs; + +struct trace_sys_enter { + struct pt_regs *regs; + long id; +}; + +SEC("tp_btf/sys_enter") +int test_core_bitfields_direct(void *ctx) +{ + struct core_reloc_bitfields *in = (void *)&data.in; + struct core_reloc_bitfields_output *out = (void *)&data.out; + + out->ub1 = BPF_CORE_READ_BITFIELD(in, ub1); + out->ub2 = BPF_CORE_READ_BITFIELD(in, ub2); + out->ub7 = BPF_CORE_READ_BITFIELD(in, ub7); + out->sb4 = BPF_CORE_READ_BITFIELD(in, sb4); + out->sb20 = BPF_CORE_READ_BITFIELD(in, sb20); + out->u32 = BPF_CORE_READ_BITFIELD(in, u32); + out->s32 = BPF_CORE_READ_BITFIELD(in, s32); + + return 0; +} + |