1//===- InputSection.cpp ---------------------------------------------------===//
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#include "InputSection.h"
10#include "OutputSegment.h"
11#include "Symbols.h"
12#include "Target.h"
13#include "lld/Common/Memory.h"
14#include "llvm/Support/Endian.h"
15
16using namespace llvm;
17using namespace llvm::MachO;
18using namespace llvm::support;
19using namespace lld;
20using namespace lld::macho;
21
22std::vector<InputSection *> macho::inputSections;
23
24uint64_t InputSection::getFileOffset() const {
25  return parent->fileOff + outSecFileOff;
26}
27
28uint64_t InputSection::getVA() const { return parent->addr + outSecOff; }
29
30void InputSection::writeTo(uint8_t *buf) {
31  if (getFileSize() == 0)
32    return;
33
34  memcpy(buf, data.data(), data.size());
35
36  for (Reloc &r : relocs) {
37    uint64_t va = 0;
38    if (auto *s = r.target.dyn_cast<Symbol *>())
39      va = target->getSymbolVA(*s, r.type);
40    else if (auto *isec = r.target.dyn_cast<InputSection *>())
41      va = isec->getVA();
42
43    uint64_t val = va + r.addend;
44    if (r.pcrel)
45      val -= getVA() + r.offset;
46    target->relocateOne(buf + r.offset, r, val);
47  }
48}
49