// SPDX-License-Identifier: GPL-2.0
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// Copyright (c) 2019 Facebook
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#include <linux/bpf.h>
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#include <stdint.h>
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#include <bpf/bpf_helpers.h>
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#include <bpf/bpf_core_read.h>
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char _license[] SEC("license") = "GPL";
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struct {
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char in[256];
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char out[256];
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} data = {};
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struct core_reloc_bitfields {
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/* unsigned bitfields */
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uint8_t ub1: 1;
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uint8_t ub2: 2;
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uint32_t ub7: 7;
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/* signed bitfields */
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int8_t sb4: 4;
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int32_t sb20: 20;
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/* non-bitfields */
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uint32_t u32;
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int32_t s32;
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};
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/* bitfield read results, all as plain integers */
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struct core_reloc_bitfields_output {
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int64_t ub1;
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int64_t ub2;
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int64_t ub7;
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int64_t sb4;
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int64_t sb20;
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int64_t u32;
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int64_t s32;
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};
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struct pt_regs;
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struct trace_sys_enter {
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struct pt_regs *regs;
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long id;
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};
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SEC("tp_btf/sys_enter")
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int test_core_bitfields_direct(void *ctx)
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{
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struct core_reloc_bitfields *in = (void *)&data.in;
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struct core_reloc_bitfields_output *out = (void *)&data.out;
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out->ub1 = BPF_CORE_READ_BITFIELD(in, ub1);
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out->ub2 = BPF_CORE_READ_BITFIELD(in, ub2);
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out->ub7 = BPF_CORE_READ_BITFIELD(in, ub7);
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out->sb4 = BPF_CORE_READ_BITFIELD(in, sb4);
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out->sb20 = BPF_CORE_READ_BITFIELD(in, sb20);
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out->u32 = BPF_CORE_READ_BITFIELD(in, u32);
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out->s32 = BPF_CORE_READ_BITFIELD(in, s32);
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return 0;
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}
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