[llvm-objcopy] Add --skip-symbol and --skip-symbols options (#80873)

Add --skip-symbol and --skip-symbols options that allow to skip symbols
when executing other options that can change the symbol's name, binding
or visibility, similar to an existing option --keep-symbol that keeps a
symbol from being removed by other options.

1 files changed, 9 insertions, 0 deletions

diff --git a/llvm/tools/llvm-objcopy/ObjcopyOptions.cpp b/llvm/tools/llvm-objcopy/ObjcopyOptions.cpp
index a0c6415..7269c51 100644
--- a/llvm/tools/llvm-objcopy/ObjcopyOptions.cpp
+++ b/llvm/tools/llvm-objcopy/ObjcopyOptions.cpp
@@ -978,6 +978,15 @@ objcopy::parseObjcopyOptions(ArrayRef<const char *> RawArgsArr,
             addSymbolsFromFile(Config.SymbolsToKeep, DC.Alloc, Arg->getValue(),
                                SymbolMatchStyle, ErrorCallback))
       return std::move(E);
+  for (auto *Arg : InputArgs.filtered(OBJCOPY_skip_symbol))
+    if (Error E = Config.SymbolsToSkip.addMatcher(NameOrPattern::create(
+            Arg->getValue(), SymbolMatchStyle, ErrorCallback)))
+      return std::move(E);
+  for (auto *Arg : InputArgs.filtered(OBJCOPY_skip_symbols))
+    if (Error E =
+            addSymbolsFromFile(Config.SymbolsToSkip, DC.Alloc, Arg->getValue(),
+                               SymbolMatchStyle, ErrorCallback))
+      return std::move(E);
   for (auto *Arg : InputArgs.filtered(OBJCOPY_add_symbol)) {
     Expected<NewSymbolInfo> SymInfo = parseNewSymbolInfo(Arg->getValue());
     if (!SymInfo)