[lld][Darwin] Add support for the -sectcreate option.

llvm-svn: 251183

2 files changed, 7 insertions, 0 deletions

diff --git a/lld/include/lld/Core/DefinedAtom.h b/lld/include/lld/Core/DefinedAtom.h
index 6c6d1f9ef9b..e4d4488ccdc 100644
--- a/lld/include/lld/Core/DefinedAtom.h
+++ b/lld/include/lld/Core/DefinedAtom.h
@@ -151,6 +151,7 @@ public:
     typeNoAlloc,            // Identifies non allocatable sections [ELF]
     typeGroupComdat,        // Identifies a section group [ELF, COFF]
     typeGnuLinkOnce,        // Identifies a gnu.linkonce section [ELF]
+    typeSectCreate,         // Created via the -sectcreate option [Darwin]
   };
 
   // Permission bits for atoms and segments. The order of these values are
diff --git a/lld/include/lld/ReaderWriter/MachOLinkingContext.h b/lld/include/lld/ReaderWriter/MachOLinkingContext.h
index a3459693c7d..dc44d3f303f 100644
--- a/lld/include/lld/ReaderWriter/MachOLinkingContext.h
+++ b/lld/include/lld/ReaderWriter/MachOLinkingContext.h
@@ -27,6 +27,7 @@ namespace mach_o {
 class ArchHandler;
 class MachODylibFile;
 class MachOFile;
+class SectCreateFile;
 }
 
 class MachOLinkingContext : public LinkingContext {
@@ -272,6 +273,10 @@ public:
   /// Add section alignment constraint on final layout.
   void addSectionAlignment(StringRef seg, StringRef sect, uint16_t align);
 
+  /// \brief Add a section based on a command-line sectcreate option.
+  void addSectCreateSection(StringRef seg, StringRef sect,
+                            std::unique_ptr<MemoryBuffer> content);
+
   /// Returns true if specified section had alignment constraints.
   bool sectionAligned(StringRef seg, StringRef sect, uint16_t &align) const;
 
@@ -416,6 +421,7 @@ private:
   llvm::StringMap<std::vector<OrderFileNode>> _orderFiles;
   unsigned _orderFileEntries;
   File *_flatNamespaceFile;
+  mach_o::SectCreateFile *_sectCreateFile = nullptr;
 };
 
 } // end namespace lld