1 //===- DWARFDataExtractor.cpp ---------------------------------------------===//
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
7 //===----------------------------------------------------------------------===//
9 #include "llvm/DebugInfo/DWARF/DWARFDataExtractor.h"
10 #include "llvm/BinaryFormat/Dwarf.h"
11 #include "llvm/DebugInfo/DWARF/DWARFContext.h"
15 uint64_t DWARFDataExtractor::getRelocatedValue(uint32_t Size, uint32_t *Off,
16 uint64_t *SecNdx) const {
18 *SecNdx = object::SectionedAddress::UndefSection;
20 return getUnsigned(Off, Size);
21 Optional<RelocAddrEntry> E = Obj->find(*Section, *Off);
22 uint64_t A = getUnsigned(Off, Size);
26 *SecNdx = E->SectionIndex;
27 uint64_t R = E->Resolver(E->Reloc, E->SymbolValue, A);
29 R = E->Resolver(*E->Reloc2, E->SymbolValue2, R);
34 DWARFDataExtractor::getEncodedPointer(uint32_t *Offset, uint8_t Encoding,
35 uint64_t PCRelOffset) const {
36 if (Encoding == dwarf::DW_EH_PE_omit)
40 uint32_t OldOffset = *Offset;
42 switch (Encoding & 0x0F) {
43 case dwarf::DW_EH_PE_absptr:
44 switch (getAddressSize()) {
48 Result = getUnsigned(Offset, getAddressSize());
54 case dwarf::DW_EH_PE_uleb128:
55 Result = getULEB128(Offset);
57 case dwarf::DW_EH_PE_sleb128:
58 Result = getSLEB128(Offset);
60 case dwarf::DW_EH_PE_udata2:
61 Result = getUnsigned(Offset, 2);
63 case dwarf::DW_EH_PE_udata4:
64 Result = getUnsigned(Offset, 4);
66 case dwarf::DW_EH_PE_udata8:
67 Result = getUnsigned(Offset, 8);
69 case dwarf::DW_EH_PE_sdata2:
70 Result = getSigned(Offset, 2);
72 case dwarf::DW_EH_PE_sdata4:
73 Result = getSigned(Offset, 4);
75 case dwarf::DW_EH_PE_sdata8:
76 Result = getSigned(Offset, 8);
81 // Then add relative offset, if required
82 switch (Encoding & 0x70) {
83 case dwarf::DW_EH_PE_absptr:
86 case dwarf::DW_EH_PE_pcrel:
87 Result += PCRelOffset;
89 case dwarf::DW_EH_PE_datarel:
90 case dwarf::DW_EH_PE_textrel:
91 case dwarf::DW_EH_PE_funcrel:
92 case dwarf::DW_EH_PE_aligned: