[llvm-objcopy][MachO] Support indirect symbol table
Summary:
Parse the indirect symbol table and update the indexes of
symbol entries in the table in the writer in case they have
been changed.
Reviewers: alexshap, rupprecht, jhenderson
Reviewed By: alexshap, rupprecht
Subscribers: jakehehrlich, abrachet, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D66280
diff --git a/llvm/tools/llvm-objcopy/MachO/Object.h b/llvm/tools/llvm-objcopy/MachO/Object.h
index 36b0f7e..bf80253 100644
--- a/llvm/tools/llvm-objcopy/MachO/Object.h
+++ b/llvm/tools/llvm-objcopy/MachO/Object.h
@@ -112,8 +112,21 @@
const SymbolEntry *getSymbolByIndex(uint32_t Index) const;
};
+struct IndirectSymbolEntry {
+ // The original value in an indirect symbol table. Higher bits encode extra
+ // information (INDIRECT_SYMBOL_LOCAL and INDIRECT_SYMBOL_ABS).
+ uint32_t OriginalIndex;
+ /// The Symbol referenced by this entry. It's None if the index is
+ /// INDIRECT_SYMBOL_LOCAL or INDIRECT_SYMBOL_ABS.
+ Optional<const SymbolEntry *> Symbol;
+
+ IndirectSymbolEntry(uint32_t OriginalIndex,
+ Optional<const SymbolEntry *> Symbol)
+ : OriginalIndex(OriginalIndex), Symbol(Symbol) {}
+};
+
struct IndirectSymbolTable {
- std::vector<uint32_t> Symbols;
+ std::vector<IndirectSymbolEntry> Symbols;
};
/// The location of the string table inside the binary is described by LC_SYMTAB