[llvm-objdump] - Move getRelocationValueString and dependenices out of the llvm-objdump.cpp

getRelocationValueString is a dispatcher function that calls the
corresponding ELF/COFF/Wasm/MachO implementations
that currently live in the llvm-objdump.cpp file.

These implementations better be moved to ELFDump.cpp,
COFFDump.cpp and other corresponding files, to move platform specific
implementation out from the common logic.

The patch does that. Also, I had to move ToolSectionFilter helper
and SectionFilterIterator, SectionFilter to a header to make them
available across the objdump code.

Differential revision: https://reviews.llvm.org/D56842

llvm-svn: 351545

1 files changed, 13 insertions, 0 deletions

diff --git a/llvm/tools/llvm-objdump/COFFDump.cpp b/llvm/tools/llvm-objdump/COFFDump.cpp
index 55607ec299b..f5a8cf75490 100644
--- a/llvm/tools/llvm-objdump/COFFDump.cpp
+++ b/llvm/tools/llvm-objdump/COFFDump.cpp
@@ -469,6 +469,19 @@ static bool getPDataSection(const COFFObjectFile *Obj,
   return false;
 }
 
+std::error_code
+llvm::getCOFFRelocationValueString(const COFFObjectFile *Obj,
+                                   const RelocationRef &Rel,
+                                   SmallVectorImpl<char> &Result) {
+  symbol_iterator SymI = Rel.getSymbol();
+  Expected<StringRef> SymNameOrErr = SymI->getName();
+  if (!SymNameOrErr)
+    return errorToErrorCode(SymNameOrErr.takeError());
+  StringRef SymName = *SymNameOrErr;
+  Result.append(SymName.begin(), SymName.end());
+  return std::error_code();
+}
+
 static void printWin64EHUnwindInfo(const Win64EH::UnwindInfo *UI) {
   // The casts to int are required in order to output the value as number.
   // Without the casts the value would be interpreted as char data (which