llvm/lib/Target/BPF/BPFCORE.h

   1 //===- BPFCORE.h - Common info for Compile-Once Run-EveryWhere  -*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #ifndef LLVM_LIB_TARGET_BPF_BPFCORE_H
  10 #define LLVM_LIB_TARGET_BPF_BPFCORE_H
  11
  12 #include "llvm/ADT/StringRef.h"
  13
  14 namespace llvm {
  15
  16 class BasicBlock;
  17 class Instruction;
  18 class Module;
  19
  20 class BPFCoreSharedInfo {
  21 public:
  22   enum PatchableRelocKind : uint32_t {
  23     FIELD_BYTE_OFFSET = 0,
  24     FIELD_BYTE_SIZE,
  25     FIELD_EXISTENCE,
  26     FIELD_SIGNEDNESS,
  27     FIELD_LSHIFT_U64,
  28     FIELD_RSHIFT_U64,
  29     BTF_TYPE_ID_LOCAL,
  30     BTF_TYPE_ID_REMOTE,
  31     TYPE_EXISTENCE,
  32     TYPE_SIZE,
  33     ENUM_VALUE_EXISTENCE,
  34     ENUM_VALUE,
  35
  36     MAX_FIELD_RELOC_KIND,
  37   };
  38
  39   enum BTFTypeIdFlag : uint32_t {
  40     BTF_TYPE_ID_LOCAL_RELOC = 0,
  41     BTF_TYPE_ID_REMOTE_RELOC,
  42
  43     MAX_BTF_TYPE_ID_FLAG,
  44   };
  45
  46   enum PreserveTypeInfo : uint32_t {
  47     PRESERVE_TYPE_INFO_EXISTENCE = 0,
  48     PRESERVE_TYPE_INFO_SIZE,
  49
  50     MAX_PRESERVE_TYPE_INFO_FLAG,
  51   };
  52
  53   enum PreserveEnumValue : uint32_t {
  54     PRESERVE_ENUM_VALUE_EXISTENCE = 0,
  55     PRESERVE_ENUM_VALUE,
  56
  57     MAX_PRESERVE_ENUM_VALUE_FLAG,
  58   };
  59
  60   /// The attribute attached to globals representing a field access
  61   static constexpr StringRef AmaAttr = "btf_ama";
  62   /// The attribute attached to globals representing a type id
  63   static constexpr StringRef TypeIdAttr = "btf_type_id";
  64
  65   /// llvm.bpf.passthrough builtin seq number
  66   static uint32_t SeqNum;
  67
  68   /// Insert a bpf passthrough builtin function.
  69   static Instruction *insertPassThrough(Module *M, BasicBlock *BB,
  70                                         Instruction *Input,
  71                                         Instruction *Before);
  72 };
  73
  74 } // namespace llvm
  75
  76 #endif