[NFCI][ELF] Merge AddendOnly and AddendOnlyWithTargetVA

lld/ELF/Relocations.cpp

@@ -887,7 +887,7 @@ static void addPltEntry(Ctx &ctx, PltSection &plt, GotPltSection &gotPlt,
   gotPlt.addEntry(sym);
   rel.addReloc({type, &gotPlt, sym.getGotPltOffset(ctx),
                 sym.isPreemptible ? DynamicReloc::AgainstSymbol
-                                  : DynamicReloc::AddendOnlyWithTargetVA,
+                                  : DynamicReloc::AddendOnly,
                 sym, 0, R_ABS});
 }
 
@@ -927,8 +927,8 @@ static void addGotAuthEntry(Ctx &ctx, Symbol &sym) {
 
   // Signed GOT requires dynamic relocation.
   ctx.in.got->getPartition(ctx).relaDyn->addReloc(
-      {R_AARCH64_AUTH_RELATIVE, ctx.in.got.get(), off,
-       DynamicReloc::AddendOnlyWithTargetVA, sym, 0, R_ABS});
+      {R_AARCH64_AUTH_RELATIVE, ctx.in.got.get(), off, DynamicReloc::AddendOnly,
+       sym, 0, R_ABS});
 }
 
 static void addTpOffsetGotEntry(Ctx &ctx, Symbol &sym) {
@@ -1160,8 +1160,8 @@ void RelocationScanner::processAux(RelExpr expr, RelType type, uint64_t offset,
           part.relrAuthDyn->relocs.push_back({sec, sec->relocs().size() - 1});
         } else {
           part.relaDyn->addReloc({R_AARCH64_AUTH_RELATIVE, sec, offset,
-                                  DynamicReloc::AddendOnlyWithTargetVA, sym,
-                                  addend, R_ABS});
+                                  DynamicReloc::AddendOnly, sym, addend,
+                                  R_ABS});
         }
         return;
       }

lld/ELF/SyntheticSections.cpp

@@ -1122,8 +1122,8 @@ void MipsGotSection::build() {
     for (const std::pair<GotEntry, size_t> &p : got.local16) {
       uint64_t offset = p.second * ctx.arg.wordsize;
       ctx.mainPart->relaDyn->addReloc({ctx.target->relativeRel, this, offset,
-                                       DynamicReloc::AddendOnlyWithTargetVA,
-                                       *p.first.first, p.first.second, R_ABS});
+                                       DynamicReloc::AddendOnly, *p.first.first,
+                                       p.first.second, R_ABS});
     }
   }
 }
@@ -1650,17 +1650,14 @@ int64_t DynamicReloc::computeAddend(Ctx &ctx) const {
   case Computed:
     llvm_unreachable("addend already computed");
   case AddendOnly:
-    assert(sym == nullptr);
-    return addend;
-  case AgainstSymbol:
-    assert(sym != nullptr);
-    return addend;
-  case AddendOnlyWithTargetVA:
   case AgainstSymbolWithTargetVA: {
     uint64_t ca = inputSec->getRelocTargetVA(
         ctx, Relocation{expr, type, 0, addend, sym}, getOffset());
     return ctx.arg.is64 ? ca : SignExtend64<32>(ca);
   }
+  case AgainstSymbol:
+    assert(sym != nullptr);
+    return addend;
   case MipsMultiGotPage:
     assert(sym == nullptr);
     return getMipsPageAddr(outputSec->addr) + addend;
@@ -1705,8 +1702,8 @@ void RelocationBaseSection::addAddendOnlyRelocIfNonPreemptible(
     addReloc({dynType, &isec, offsetInSec, DynamicReloc::AgainstSymbol, sym, 0,
               R_ABS});
   else
-    addReloc(DynamicReloc::AddendOnlyWithTargetVA, dynType, isec, offsetInSec,
-             sym, 0, R_ABS, addendRelType);
+    addReloc(DynamicReloc::AddendOnly, dynType, isec, offsetInSec, sym, 0,
+             R_ABS, addendRelType);
 }
 
 void RelocationBaseSection::mergeRels() {

lld/ELF/SyntheticSections.h

@@ -422,13 +422,10 @@ class DynamicReloc {
     /// The resulting dynamic relocation has already had its addend computed.
     /// Calling computeAddend() is an error. Only for internal use.
     Computed,
-    /// The resulting dynamic relocation does not reference a symbol (#sym must
-    /// be nullptr) and uses #addend as the result of computeAddend(ctx).
-    AddendOnly,
     /// The resulting dynamic relocation will not reference a symbol: #sym is
     /// only used to compute the addend with InputSection::getRelocTargetVA().
     /// Useful for various relative and TLS relocations (e.g. R_X86_64_TPOFF64).
-    AddendOnlyWithTargetVA,
+    AddendOnly,
     /// The resulting dynamic relocation references symbol #sym from the dynamic
     /// symbol table and uses #addend as the value of computeAddend(ctx).
     AgainstSymbol,
@@ -441,7 +438,7 @@ class DynamicReloc {
     /// addresses of 64kb pages that lie inside the output section.
     MipsMultiGotPage,
   };
-  /// This constructor records a relocation against a symbol.
+  /// This constructor records a normal relocation.
   DynamicReloc(RelType type, const InputSectionBase *inputSec,
                uint64_t offsetInSec, Kind kind, Symbol &sym, int64_t addend,
                RelExpr expr)
@@ -450,8 +447,9 @@ class DynamicReloc {
   /// This constructor records a relative relocation with no symbol.
   DynamicReloc(RelType type, const InputSectionBase *inputSec,
                uint64_t offsetInSec, int64_t addend = 0)
-      : sym(nullptr), inputSec(inputSec), offsetInSec(offsetInSec), type(type),
-        addend(addend), kind(AddendOnly), expr(R_ADDEND) {}
+      : sym(inputSec->getCtx().dummySym), inputSec(inputSec),
+        offsetInSec(offsetInSec), type(type), addend(addend), kind(AddendOnly),
+        expr(R_ADDEND) {}
   /// This constructor records dynamic relocation settings used by the MIPS
   /// multi-GOT implementation.
   DynamicReloc(RelType type, const InputSectionBase *inputSec,
@@ -532,8 +530,8 @@ class RelocationBaseSection : public SyntheticSection {
                         uint64_t offsetInSec, Symbol &sym, int64_t addend,
                         RelType addendRelType, RelExpr expr) {
     assert(expr != R_ADDEND && "expected non-addend relocation expression");
-    addReloc<shard>(DynamicReloc::AddendOnlyWithTargetVA, dynType, isec,
-                    offsetInSec, sym, addend, expr, addendRelType);
+    addReloc<shard>(DynamicReloc::AddendOnly, dynType, isec, offsetInSec, sym,
+                    addend, expr, addendRelType);
   }
   /// Add a dynamic relocation using the target address of \p sym as the addend
   /// if \p sym is non-preemptible. Otherwise add a relocation against \p sym.

lld/ELF/Writer.cpp

@@ -1586,8 +1586,7 @@ template <class ELFT> void Writer<ELFT>::finalizeAddressDependentContent() {
               if (isInt<32>(reloc.sym->getVA(ctx, reloc.addend)))
                 return false;
               part.relaDyn->addReloc({R_AARCH64_AUTH_RELATIVE, elem.inputSec,
-                                      reloc.offset,
-                                      DynamicReloc::AddendOnlyWithTargetVA,
+                                      reloc.offset, DynamicReloc::AddendOnly,
                                       *reloc.sym, reloc.addend, R_ABS});
               return true;
             });