[llvm] [llvm-objcopy] Add --change-section-address (PR #98664)

[Eleanor Bonnici via llvm-commits]

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@@ -584,6 +584,65 @@ static Expected<int64_t> parseChangeSectionLMA(StringRef ArgValue,
   return *LMAValue;
 }
 
+static Expected<SectionPatternAddressUpdate>
+parseChangeSectionAddr(StringRef ArgValue, StringRef OptionName,
+                       MatchStyle SectionMatchStyle,
+                       function_ref<Error(Error)> ErrorCallback) {
+
+  SectionPatternAddressUpdate PatternUpdate;
+  std::pair<StringRef, StringRef> UpdateParts;
+  std::string UpdateSymbol;
+
+  if (ArgValue.contains("+")) {
+    UpdateParts = ArgValue.split("+");
+    UpdateSymbol = '+';
+  } else if (ArgValue.contains("-")) {
+    UpdateParts = ArgValue.split("-");
+    UpdateSymbol = '-';
+    PatternUpdate.Update.Negative = true;
+  } else if (ArgValue.contains("=")) {
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eleanor-arm wrote:

This is now rewritten using a better algorithm. 

https://github.com/llvm/llvm-project/pull/98664