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1 //===- UnwindInfoSection.h ------------------------------------------------===//
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2 //
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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6 //
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7 //===----------------------------------------------------------------------===//
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8
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9 #ifndef LLD_MACHO_UNWIND_INFO_H
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10 #define LLD_MACHO_UNWIND_INFO_H
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11
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12 #include "ConcatOutputSection.h"
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13 #include "SyntheticSections.h"
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14
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15 #include "mach-o/compact_unwind_encoding.h"
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16 #include "llvm/ADT/DenseMap.h"
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17
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18 #include <vector>
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19
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20 namespace lld {
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21 namespace macho {
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22
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23 template <class Ptr> struct CompactUnwindEntry {
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24 Ptr functionAddress;
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25 uint32_t functionLength;
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26 compact_unwind_encoding_t encoding;
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27 Ptr personality;
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28 Ptr lsda;
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29 };
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30
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31 class UnwindInfoSection : public SyntheticSection {
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32 public:
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33 bool isNeeded() const override { return compactUnwindSection != nullptr; }
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34 uint64_t getSize() const override { return unwindInfoSize; }
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35 virtual void prepareRelocations(InputSection *) = 0;
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36
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37 void setCompactUnwindSection(ConcatOutputSection *cuSection) {
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38 compactUnwindSection = cuSection;
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39 }
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40
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41 protected:
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42 UnwindInfoSection()
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43 : SyntheticSection(segment_names::text, section_names::unwindInfo) {
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44 align = 4;
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45 }
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46
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47 ConcatOutputSection *compactUnwindSection = nullptr;
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48 uint64_t unwindInfoSize = 0;
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49 };
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50
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51 UnwindInfoSection *makeUnwindInfoSection();
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52
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53 } // namespace macho
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54 } // namespace lld
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55
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56 #endif
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