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57 lines
2.0 KiB
C++
57 lines
2.0 KiB
C++
//===--- ImageInspectionStatic.cpp ----------------------------------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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//
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// Implementation of functions to read data sections from static executable.
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//
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//===----------------------------------------------------------------------===//
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#include "ImageInspection.h"
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#include <cstring>
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// Currently only tested on linux but should work for any ELF platform
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#if defined(__ELF__) && defined(__linux__)
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// These are defined in swift_sections.S to mark the start of a section with the
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// length of the data followed immediately by the section data
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struct alignas(uint64_t) Section;
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extern const Section protocolConformancesStart asm(".swift2_protocol_conformances_start");
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extern const Section typeMetadataStart asm(".swift2_type_metadata_start");
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struct SectionInfo {
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uint64_t size;
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const char *data;
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};
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static SectionInfo
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getSectionInfo(const Section *section) {
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SectionInfo info;
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memcpy(&info.size, section, sizeof(uint64_t));
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info.data = reinterpret_cast<const char *>(section) + sizeof(uint64_t);
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return info;
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}
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void
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swift::initializeProtocolConformanceLookup() {
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auto protocolConformances = getSectionInfo(&protocolConformancesStart);
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addImageProtocolConformanceBlockCallback(protocolConformances.data,
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protocolConformances.size);
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}
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void
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swift::initializeTypeMetadataRecordLookup() {
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auto typeMetadata = getSectionInfo(&typeMetadataStart);
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addImageTypeMetadataRecordBlockCallback(typeMetadata.data,
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typeMetadata.size);
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}
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#endif // defined(__ELF__) && defined(__linux__)
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