[llvm] [PAC][MC][ELF][AArch64] Support signed TLSDESC (PR #120010)

Daniil Kovalev via llvm-commits llvm-commits at lists.llvm.org
Sun Dec 15 07:36:44 PST 2024


https://github.com/kovdan01 created https://github.com/llvm/llvm-project/pull/120010

Support the following in assembler:

```
adrp xN, :tlsdesc_auth:sym
ldr  xN, [xM, :tlsdesc_auth_lo12:sym]
add  xN, xM, :tlsdesc_auth_lo12:sym
```

These correspond to the following relocations:

```
R_AARCH64_AUTH_TLSDESC_ADR_PAGE21
R_AARCH64_AUTH_TLSDESC_LD64_LO12
R_AARCH64_AUTH_TLSDESC_ADD_LO12
```

>From f941e5ba2cd057134571929e8df6e351ad32cf4e Mon Sep 17 00:00:00 2001
From: Daniil Kovalev <dkovalev at accesssoftek.com>
Date: Sun, 15 Dec 2024 18:30:33 +0300
Subject: [PATCH] [PAC][MC] Support signed TLSDESC

Support the following in assembler:

```
adrp xN, :tlsdesc_auth:sym
ldr  xN, [xM, :tlsdesc_auth_lo12:sym]
add  xN, xM, :tlsdesc_auth_lo12:sym
```

These correspond to the following relocations:

```
R_AARCH64_AUTH_TLSDESC_ADR_PAGE21
R_AARCH64_AUTH_TLSDESC_LD64_LO12
R_AARCH64_AUTH_TLSDESC_ADD_LO12
```
---
 .../lib/Target/AArch64/AArch64MCInstLower.cpp |  26 +++-
 .../AArch64/AsmParser/AArch64AsmParser.cpp    | 109 ++++++++-------
 .../MCTargetDesc/AArch64ELFObjectWriter.cpp   |  26 ++++
 .../AArch64/MCTargetDesc/AArch64MCExpr.cpp    |   4 +
 .../AArch64/MCTargetDesc/AArch64MCExpr.h      | 127 +++++++++---------
 llvm/test/MC/AArch64/arm64-elf-relocs.s       |  55 +++++---
 llvm/test/MC/AArch64/ilp32-diagnostics.s      |   9 ++
 7 files changed, 218 insertions(+), 138 deletions(-)

diff --git a/llvm/lib/Target/AArch64/AArch64MCInstLower.cpp b/llvm/lib/Target/AArch64/AArch64MCInstLower.cpp
index 9f234b0f917058..46ce151ca82b64 100644
--- a/llvm/lib/Target/AArch64/AArch64MCInstLower.cpp
+++ b/llvm/lib/Target/AArch64/AArch64MCInstLower.cpp
@@ -194,12 +194,16 @@ MCOperand AArch64MCInstLower::lowerSymbolOperandELF(const MachineOperand &MO,
   } else if (MO.getTargetFlags() & AArch64II::MO_TLS) {
     TLSModel::Model Model;
     if (MO.isGlobal()) {
-      const GlobalValue *GV = MO.getGlobal();
-      Model = Printer.TM.getTLSModel(GV);
-      if (!EnableAArch64ELFLocalDynamicTLSGeneration &&
-          Model == TLSModel::LocalDynamic)
+      const MachineFunction *MF = MO.getParent()->getParent()->getParent();
+      if (MF->getInfo<AArch64FunctionInfo>()->hasELFSignedGOT()) {
         Model = TLSModel::GeneralDynamic;
-
+      } else {
+        const GlobalValue *GV = MO.getGlobal();
+        Model = Printer.TM.getTLSModel(GV);
+        if (!EnableAArch64ELFLocalDynamicTLSGeneration &&
+            Model == TLSModel::LocalDynamic)
+          Model = TLSModel::GeneralDynamic;
+      }
     } else {
       assert(MO.isSymbol() &&
              StringRef(MO.getSymbolName()) == "_TLS_MODULE_BASE_" &&
@@ -218,10 +222,18 @@ MCOperand AArch64MCInstLower::lowerSymbolOperandELF(const MachineOperand &MO,
     case TLSModel::LocalDynamic:
       RefFlags |= AArch64MCExpr::VK_DTPREL;
       break;
-    case TLSModel::GeneralDynamic:
-      RefFlags |= AArch64MCExpr::VK_TLSDESC;
+    case TLSModel::GeneralDynamic: {
+      // TODO: it's probably better to introduce MO_TLS_AUTH or smth and avoid
+      // running hasELFSignedGOT() every time, but existing flags already
+      // cover all 12 bits of SubReg_TargetFlags field in MachineOperand, and
+      // making the field wider breaks static assertions.
+      const MachineFunction *MF = MO.getParent()->getParent()->getParent();
+      RefFlags |= MF->getInfo<AArch64FunctionInfo>()->hasELFSignedGOT()
+                      ? AArch64MCExpr::VK_TLSDESC_AUTH
+                      : AArch64MCExpr::VK_TLSDESC;
       break;
     }
+    }
   } else if (MO.getTargetFlags() & AArch64II::MO_PREL) {
     RefFlags |= AArch64MCExpr::VK_PREL;
   } else {
diff --git a/llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp b/llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
index 93c85ba62f90e2..d1173e5e12b22b 100644
--- a/llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
+++ b/llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
@@ -904,6 +904,7 @@ class AArch64Operand : public MCParsedAsmOperand {
         ELFRefKind == AArch64MCExpr::VK_TPREL_LO12_NC ||
         ELFRefKind == AArch64MCExpr::VK_GOTTPREL_LO12_NC ||
         ELFRefKind == AArch64MCExpr::VK_TLSDESC_LO12 ||
+        ELFRefKind == AArch64MCExpr::VK_TLSDESC_AUTH_LO12 ||
         ELFRefKind == AArch64MCExpr::VK_SECREL_LO12 ||
         ELFRefKind == AArch64MCExpr::VK_SECREL_HI12 ||
         ELFRefKind == AArch64MCExpr::VK_GOT_PAGE_LO15) {
@@ -1021,6 +1022,7 @@ class AArch64Operand : public MCParsedAsmOperand {
              ELFRefKind == AArch64MCExpr::VK_TPREL_LO12 ||
              ELFRefKind == AArch64MCExpr::VK_TPREL_LO12_NC ||
              ELFRefKind == AArch64MCExpr::VK_TLSDESC_LO12 ||
+             ELFRefKind == AArch64MCExpr::VK_TLSDESC_AUTH_LO12 ||
              ELFRefKind == AArch64MCExpr::VK_SECREL_HI12 ||
              ELFRefKind == AArch64MCExpr::VK_SECREL_LO12;
     }
@@ -3314,7 +3316,8 @@ ParseStatus AArch64AsmParser::tryParseAdrpLabel(OperandVector &Operands) {
                ELFRefKind != AArch64MCExpr::VK_GOT_AUTH_PAGE &&
                ELFRefKind != AArch64MCExpr::VK_GOT_PAGE_LO15 &&
                ELFRefKind != AArch64MCExpr::VK_GOTTPREL_PAGE &&
-               ELFRefKind != AArch64MCExpr::VK_TLSDESC_PAGE) {
+               ELFRefKind != AArch64MCExpr::VK_TLSDESC_PAGE &&
+               ELFRefKind != AArch64MCExpr::VK_TLSDESC_AUTH_PAGE) {
       // The operand must be an @page or @gotpage qualified symbolref.
       return Error(S, "page or gotpage label reference expected");
     }
@@ -4398,56 +4401,59 @@ bool AArch64AsmParser::parseSymbolicImmVal(const MCExpr *&ImmVal) {
       return TokError("expect relocation specifier in operand after ':'");
 
     std::string LowerCase = getTok().getIdentifier().lower();
-    RefKind = StringSwitch<AArch64MCExpr::VariantKind>(LowerCase)
-                  .Case("lo12", AArch64MCExpr::VK_LO12)
-                  .Case("abs_g3", AArch64MCExpr::VK_ABS_G3)
-                  .Case("abs_g2", AArch64MCExpr::VK_ABS_G2)
-                  .Case("abs_g2_s", AArch64MCExpr::VK_ABS_G2_S)
-                  .Case("abs_g2_nc", AArch64MCExpr::VK_ABS_G2_NC)
-                  .Case("abs_g1", AArch64MCExpr::VK_ABS_G1)
-                  .Case("abs_g1_s", AArch64MCExpr::VK_ABS_G1_S)
-                  .Case("abs_g1_nc", AArch64MCExpr::VK_ABS_G1_NC)
-                  .Case("abs_g0", AArch64MCExpr::VK_ABS_G0)
-                  .Case("abs_g0_s", AArch64MCExpr::VK_ABS_G0_S)
-                  .Case("abs_g0_nc", AArch64MCExpr::VK_ABS_G0_NC)
-                  .Case("prel_g3", AArch64MCExpr::VK_PREL_G3)
-                  .Case("prel_g2", AArch64MCExpr::VK_PREL_G2)
-                  .Case("prel_g2_nc", AArch64MCExpr::VK_PREL_G2_NC)
-                  .Case("prel_g1", AArch64MCExpr::VK_PREL_G1)
-                  .Case("prel_g1_nc", AArch64MCExpr::VK_PREL_G1_NC)
-                  .Case("prel_g0", AArch64MCExpr::VK_PREL_G0)
-                  .Case("prel_g0_nc", AArch64MCExpr::VK_PREL_G0_NC)
-                  .Case("dtprel_g2", AArch64MCExpr::VK_DTPREL_G2)
-                  .Case("dtprel_g1", AArch64MCExpr::VK_DTPREL_G1)
-                  .Case("dtprel_g1_nc", AArch64MCExpr::VK_DTPREL_G1_NC)
-                  .Case("dtprel_g0", AArch64MCExpr::VK_DTPREL_G0)
-                  .Case("dtprel_g0_nc", AArch64MCExpr::VK_DTPREL_G0_NC)
-                  .Case("dtprel_hi12", AArch64MCExpr::VK_DTPREL_HI12)
-                  .Case("dtprel_lo12", AArch64MCExpr::VK_DTPREL_LO12)
-                  .Case("dtprel_lo12_nc", AArch64MCExpr::VK_DTPREL_LO12_NC)
-                  .Case("pg_hi21_nc", AArch64MCExpr::VK_ABS_PAGE_NC)
-                  .Case("tprel_g2", AArch64MCExpr::VK_TPREL_G2)
-                  .Case("tprel_g1", AArch64MCExpr::VK_TPREL_G1)
-                  .Case("tprel_g1_nc", AArch64MCExpr::VK_TPREL_G1_NC)
-                  .Case("tprel_g0", AArch64MCExpr::VK_TPREL_G0)
-                  .Case("tprel_g0_nc", AArch64MCExpr::VK_TPREL_G0_NC)
-                  .Case("tprel_hi12", AArch64MCExpr::VK_TPREL_HI12)
-                  .Case("tprel_lo12", AArch64MCExpr::VK_TPREL_LO12)
-                  .Case("tprel_lo12_nc", AArch64MCExpr::VK_TPREL_LO12_NC)
-                  .Case("tlsdesc_lo12", AArch64MCExpr::VK_TLSDESC_LO12)
-                  .Case("got", AArch64MCExpr::VK_GOT_PAGE)
-                  .Case("gotpage_lo15", AArch64MCExpr::VK_GOT_PAGE_LO15)
-                  .Case("got_lo12", AArch64MCExpr::VK_GOT_LO12)
-                  .Case("got_auth", AArch64MCExpr::VK_GOT_AUTH_PAGE)
-                  .Case("got_auth_lo12", AArch64MCExpr::VK_GOT_AUTH_LO12)
-                  .Case("gottprel", AArch64MCExpr::VK_GOTTPREL_PAGE)
-                  .Case("gottprel_lo12", AArch64MCExpr::VK_GOTTPREL_LO12_NC)
-                  .Case("gottprel_g1", AArch64MCExpr::VK_GOTTPREL_G1)
-                  .Case("gottprel_g0_nc", AArch64MCExpr::VK_GOTTPREL_G0_NC)
-                  .Case("tlsdesc", AArch64MCExpr::VK_TLSDESC_PAGE)
-                  .Case("secrel_lo12", AArch64MCExpr::VK_SECREL_LO12)
-                  .Case("secrel_hi12", AArch64MCExpr::VK_SECREL_HI12)
-                  .Default(AArch64MCExpr::VK_INVALID);
+    RefKind =
+        StringSwitch<AArch64MCExpr::VariantKind>(LowerCase)
+            .Case("lo12", AArch64MCExpr::VK_LO12)
+            .Case("abs_g3", AArch64MCExpr::VK_ABS_G3)
+            .Case("abs_g2", AArch64MCExpr::VK_ABS_G2)
+            .Case("abs_g2_s", AArch64MCExpr::VK_ABS_G2_S)
+            .Case("abs_g2_nc", AArch64MCExpr::VK_ABS_G2_NC)
+            .Case("abs_g1", AArch64MCExpr::VK_ABS_G1)
+            .Case("abs_g1_s", AArch64MCExpr::VK_ABS_G1_S)
+            .Case("abs_g1_nc", AArch64MCExpr::VK_ABS_G1_NC)
+            .Case("abs_g0", AArch64MCExpr::VK_ABS_G0)
+            .Case("abs_g0_s", AArch64MCExpr::VK_ABS_G0_S)
+            .Case("abs_g0_nc", AArch64MCExpr::VK_ABS_G0_NC)
+            .Case("prel_g3", AArch64MCExpr::VK_PREL_G3)
+            .Case("prel_g2", AArch64MCExpr::VK_PREL_G2)
+            .Case("prel_g2_nc", AArch64MCExpr::VK_PREL_G2_NC)
+            .Case("prel_g1", AArch64MCExpr::VK_PREL_G1)
+            .Case("prel_g1_nc", AArch64MCExpr::VK_PREL_G1_NC)
+            .Case("prel_g0", AArch64MCExpr::VK_PREL_G0)
+            .Case("prel_g0_nc", AArch64MCExpr::VK_PREL_G0_NC)
+            .Case("dtprel_g2", AArch64MCExpr::VK_DTPREL_G2)
+            .Case("dtprel_g1", AArch64MCExpr::VK_DTPREL_G1)
+            .Case("dtprel_g1_nc", AArch64MCExpr::VK_DTPREL_G1_NC)
+            .Case("dtprel_g0", AArch64MCExpr::VK_DTPREL_G0)
+            .Case("dtprel_g0_nc", AArch64MCExpr::VK_DTPREL_G0_NC)
+            .Case("dtprel_hi12", AArch64MCExpr::VK_DTPREL_HI12)
+            .Case("dtprel_lo12", AArch64MCExpr::VK_DTPREL_LO12)
+            .Case("dtprel_lo12_nc", AArch64MCExpr::VK_DTPREL_LO12_NC)
+            .Case("pg_hi21_nc", AArch64MCExpr::VK_ABS_PAGE_NC)
+            .Case("tprel_g2", AArch64MCExpr::VK_TPREL_G2)
+            .Case("tprel_g1", AArch64MCExpr::VK_TPREL_G1)
+            .Case("tprel_g1_nc", AArch64MCExpr::VK_TPREL_G1_NC)
+            .Case("tprel_g0", AArch64MCExpr::VK_TPREL_G0)
+            .Case("tprel_g0_nc", AArch64MCExpr::VK_TPREL_G0_NC)
+            .Case("tprel_hi12", AArch64MCExpr::VK_TPREL_HI12)
+            .Case("tprel_lo12", AArch64MCExpr::VK_TPREL_LO12)
+            .Case("tprel_lo12_nc", AArch64MCExpr::VK_TPREL_LO12_NC)
+            .Case("tlsdesc_lo12", AArch64MCExpr::VK_TLSDESC_LO12)
+            .Case("tlsdesc_auth_lo12", AArch64MCExpr::VK_TLSDESC_AUTH_LO12)
+            .Case("got", AArch64MCExpr::VK_GOT_PAGE)
+            .Case("gotpage_lo15", AArch64MCExpr::VK_GOT_PAGE_LO15)
+            .Case("got_lo12", AArch64MCExpr::VK_GOT_LO12)
+            .Case("got_auth", AArch64MCExpr::VK_GOT_AUTH_PAGE)
+            .Case("got_auth_lo12", AArch64MCExpr::VK_GOT_AUTH_LO12)
+            .Case("gottprel", AArch64MCExpr::VK_GOTTPREL_PAGE)
+            .Case("gottprel_lo12", AArch64MCExpr::VK_GOTTPREL_LO12_NC)
+            .Case("gottprel_g1", AArch64MCExpr::VK_GOTTPREL_G1)
+            .Case("gottprel_g0_nc", AArch64MCExpr::VK_GOTTPREL_G0_NC)
+            .Case("tlsdesc", AArch64MCExpr::VK_TLSDESC_PAGE)
+            .Case("tlsdesc_auth", AArch64MCExpr::VK_TLSDESC_AUTH_PAGE)
+            .Case("secrel_lo12", AArch64MCExpr::VK_SECREL_LO12)
+            .Case("secrel_hi12", AArch64MCExpr::VK_SECREL_HI12)
+            .Default(AArch64MCExpr::VK_INVALID);
 
     if (RefKind == AArch64MCExpr::VK_INVALID)
       return TokError("expect relocation specifier in operand after ':'");
@@ -5821,6 +5827,7 @@ bool AArch64AsmParser::validateInstruction(MCInst &Inst, SMLoc &IDLoc,
              ELFRefKind == AArch64MCExpr::VK_TPREL_LO12 ||
              ELFRefKind == AArch64MCExpr::VK_TPREL_LO12_NC ||
              ELFRefKind == AArch64MCExpr::VK_TLSDESC_LO12 ||
+             ELFRefKind == AArch64MCExpr::VK_TLSDESC_AUTH_LO12 ||
              ELFRefKind == AArch64MCExpr::VK_SECREL_LO12 ||
              ELFRefKind == AArch64MCExpr::VK_SECREL_HI12) &&
             (Inst.getOpcode() == AArch64::ADDXri ||
diff --git a/llvm/lib/Target/AArch64/MCTargetDesc/AArch64ELFObjectWriter.cpp b/llvm/lib/Target/AArch64/MCTargetDesc/AArch64ELFObjectWriter.cpp
index 04f90e21bb3b1f..947ec401238e27 100644
--- a/llvm/lib/Target/AArch64/MCTargetDesc/AArch64ELFObjectWriter.cpp
+++ b/llvm/lib/Target/AArch64/MCTargetDesc/AArch64ELFObjectWriter.cpp
@@ -187,6 +187,15 @@ unsigned AArch64ELFObjectWriter::getRelocType(MCContext &Ctx,
         return R_CLS(TLSIE_ADR_GOTTPREL_PAGE21);
       if (SymLoc == AArch64MCExpr::VK_TLSDESC && !IsNC)
         return R_CLS(TLSDESC_ADR_PAGE21);
+      if (SymLoc == AArch64MCExpr::VK_TLSDESC_AUTH && !IsNC) {
+        if (IsILP32) {
+          Ctx.reportError(Fixup.getLoc(),
+                          "ILP32 ADRP AUTH relocation not supported "
+                          "(LP64 eqv: AUTH_TLSDESC_ADR_PAGE21)");
+          return ELF::R_AARCH64_NONE;
+        }
+        return ELF::R_AARCH64_AUTH_TLSDESC_ADR_PAGE21;
+      }
       Ctx.reportError(Fixup.getLoc(),
                       "invalid symbol kind for ADRP relocation");
       return ELF::R_AARCH64_NONE;
@@ -267,6 +276,15 @@ unsigned AArch64ELFObjectWriter::getRelocType(MCContext &Ctx,
         return R_CLS(TLSLE_ADD_TPREL_LO12);
       if (RefKind == AArch64MCExpr::VK_TLSDESC_LO12)
         return R_CLS(TLSDESC_ADD_LO12);
+      if (RefKind == AArch64MCExpr::VK_TLSDESC_AUTH_LO12) {
+        if (IsILP32) {
+          Ctx.reportError(Fixup.getLoc(),
+                          "ILP32 ADD AUTH relocation not supported "
+                          "(LP64 eqv: AUTH_TLSDESC_ADD_LO12)");
+          return ELF::R_AARCH64_NONE;
+        }
+        return ELF::R_AARCH64_AUTH_TLSDESC_ADD_LO12;
+      }
       if (RefKind == AArch64MCExpr::VK_GOT_AUTH_LO12 && IsNC) {
         if (IsILP32) {
           Ctx.reportError(Fixup.getLoc(),
@@ -411,6 +429,14 @@ unsigned AArch64ELFObjectWriter::getRelocType(MCContext &Ctx,
                                         "TLSDESC_LD64_LO12)");
         return ELF::R_AARCH64_NONE;
       }
+      if (SymLoc == AArch64MCExpr::VK_TLSDESC_AUTH) {
+        if (!IsILP32)
+          return ELF::R_AARCH64_AUTH_TLSDESC_LD64_LO12;
+        Ctx.reportError(Fixup.getLoc(), "ILP32 64-bit load/store AUTH "
+                                        "relocation not supported (LP64 eqv: "
+                                        "AUTH_TLSDESC_LD64_LO12)");
+        return ELF::R_AARCH64_NONE;
+      }
       Ctx.reportError(Fixup.getLoc(),
                       "invalid fixup for 64-bit load/store instruction");
       return ELF::R_AARCH64_NONE;
diff --git a/llvm/lib/Target/AArch64/MCTargetDesc/AArch64MCExpr.cpp b/llvm/lib/Target/AArch64/MCTargetDesc/AArch64MCExpr.cpp
index 3430b9002894f0..53e4e1730f070c 100644
--- a/llvm/lib/Target/AArch64/MCTargetDesc/AArch64MCExpr.cpp
+++ b/llvm/lib/Target/AArch64/MCTargetDesc/AArch64MCExpr.cpp
@@ -68,6 +68,7 @@ StringRef AArch64MCExpr::getVariantKindName() const {
   case VK_TPREL_LO12:          return ":tprel_lo12:";
   case VK_TPREL_LO12_NC:       return ":tprel_lo12_nc:";
   case VK_TLSDESC_LO12:        return ":tlsdesc_lo12:";
+  case VK_TLSDESC_AUTH_LO12:   return ":tlsdesc_auth_lo12:";
   case VK_ABS_PAGE:            return "";
   case VK_ABS_PAGE_NC:         return ":pg_hi21_nc:";
   case VK_GOT:                 return ":got:";
@@ -81,6 +82,8 @@ StringRef AArch64MCExpr::getVariantKindName() const {
   case VK_GOTTPREL_G0_NC:      return ":gottprel_g0_nc:";
   case VK_TLSDESC:             return "";
   case VK_TLSDESC_PAGE:        return ":tlsdesc:";
+  case VK_TLSDESC_AUTH:        return "";
+  case VK_TLSDESC_AUTH_PAGE:   return ":tlsdesc_auth:";
   case VK_SECREL_LO12:         return ":secrel_lo12:";
   case VK_SECREL_HI12:         return ":secrel_hi12:";
   case VK_GOT_AUTH:            return ":got_auth:";
@@ -154,6 +157,7 @@ void AArch64MCExpr::fixELFSymbolsInTLSFixups(MCAssembler &Asm) const {
   case VK_GOTTPREL:
   case VK_TPREL:
   case VK_TLSDESC:
+  case VK_TLSDESC_AUTH:
     break;
   }
 
diff --git a/llvm/lib/Target/AArch64/MCTargetDesc/AArch64MCExpr.h b/llvm/lib/Target/AArch64/MCTargetDesc/AArch64MCExpr.h
index 699992782f67b8..3f9a85d634d8f2 100644
--- a/llvm/lib/Target/AArch64/MCTargetDesc/AArch64MCExpr.h
+++ b/llvm/lib/Target/AArch64/MCTargetDesc/AArch64MCExpr.h
@@ -28,19 +28,20 @@ class AArch64MCExpr : public MCTargetExpr {
     // Symbol locations specifying (roughly speaking) what calculation should be
     // performed to construct the final address for the relocated
     // symbol. E.g. direct, via the GOT, ...
-    VK_ABS      = 0x001,
-    VK_SABS     = 0x002,
-    VK_PREL     = 0x003,
-    VK_GOT      = 0x004,
-    VK_DTPREL   = 0x005,
-    VK_GOTTPREL = 0x006,
-    VK_TPREL    = 0x007,
-    VK_TLSDESC  = 0x008,
-    VK_SECREL   = 0x009,
-    VK_AUTH     = 0x00a,
-    VK_AUTHADDR = 0x00b,
-    VK_GOT_AUTH = 0x00c,
-    VK_SymLocBits = 0x00f,
+    VK_ABS          = 0x001,
+    VK_SABS         = 0x002,
+    VK_PREL         = 0x003,
+    VK_GOT          = 0x004,
+    VK_DTPREL       = 0x005,
+    VK_GOTTPREL     = 0x006,
+    VK_TPREL        = 0x007,
+    VK_TLSDESC      = 0x008,
+    VK_SECREL       = 0x009,
+    VK_AUTH         = 0x00a,
+    VK_AUTHADDR     = 0x00b,
+    VK_GOT_AUTH     = 0x00c,
+    VK_TLSDESC_AUTH = 0x00d,
+    VK_SymLocBits   = 0x00f,
 
     // Variants specifying which part of the final address calculation is
     // used. E.g. the low 12 bits for an ADD/LDR, the middle 16 bits for a
@@ -67,55 +68,57 @@ class AArch64MCExpr : public MCTargetExpr {
     // omitted in line with assembly syntax here (VK_LO12 rather than VK_LO12_NC
     // since a user would write ":lo12:").
     VK_CALL              = VK_ABS,
-    VK_ABS_PAGE          = VK_ABS      | VK_PAGE,
-    VK_ABS_PAGE_NC       = VK_ABS      | VK_PAGE    | VK_NC,
-    VK_ABS_G3            = VK_ABS      | VK_G3,
-    VK_ABS_G2            = VK_ABS      | VK_G2,
-    VK_ABS_G2_S          = VK_SABS     | VK_G2,
-    VK_ABS_G2_NC         = VK_ABS      | VK_G2      | VK_NC,
-    VK_ABS_G1            = VK_ABS      | VK_G1,
-    VK_ABS_G1_S          = VK_SABS     | VK_G1,
-    VK_ABS_G1_NC         = VK_ABS      | VK_G1      | VK_NC,
-    VK_ABS_G0            = VK_ABS      | VK_G0,
-    VK_ABS_G0_S          = VK_SABS     | VK_G0,
-    VK_ABS_G0_NC         = VK_ABS      | VK_G0      | VK_NC,
-    VK_LO12              = VK_ABS      | VK_PAGEOFF | VK_NC,
-    VK_PREL_G3           = VK_PREL     | VK_G3,
-    VK_PREL_G2           = VK_PREL     | VK_G2,
-    VK_PREL_G2_NC        = VK_PREL     | VK_G2      | VK_NC,
-    VK_PREL_G1           = VK_PREL     | VK_G1,
-    VK_PREL_G1_NC        = VK_PREL     | VK_G1      | VK_NC,
-    VK_PREL_G0           = VK_PREL     | VK_G0,
-    VK_PREL_G0_NC        = VK_PREL     | VK_G0      | VK_NC,
-    VK_GOT_LO12          = VK_GOT      | VK_PAGEOFF | VK_NC,
-    VK_GOT_PAGE          = VK_GOT      | VK_PAGE,
-    VK_GOT_PAGE_LO15     = VK_GOT      | VK_LO15    | VK_NC,
-    VK_GOT_AUTH_LO12     = VK_GOT_AUTH | VK_PAGEOFF | VK_NC,
-    VK_GOT_AUTH_PAGE     = VK_GOT_AUTH | VK_PAGE,
-    VK_DTPREL_G2         = VK_DTPREL   | VK_G2,
-    VK_DTPREL_G1         = VK_DTPREL   | VK_G1,
-    VK_DTPREL_G1_NC      = VK_DTPREL   | VK_G1      | VK_NC,
-    VK_DTPREL_G0         = VK_DTPREL   | VK_G0,
-    VK_DTPREL_G0_NC      = VK_DTPREL   | VK_G0      | VK_NC,
-    VK_DTPREL_HI12       = VK_DTPREL   | VK_HI12,
-    VK_DTPREL_LO12       = VK_DTPREL   | VK_PAGEOFF,
-    VK_DTPREL_LO12_NC    = VK_DTPREL   | VK_PAGEOFF | VK_NC,
-    VK_GOTTPREL_PAGE     = VK_GOTTPREL | VK_PAGE,
-    VK_GOTTPREL_LO12_NC  = VK_GOTTPREL | VK_PAGEOFF | VK_NC,
-    VK_GOTTPREL_G1       = VK_GOTTPREL | VK_G1,
-    VK_GOTTPREL_G0_NC    = VK_GOTTPREL | VK_G0      | VK_NC,
-    VK_TPREL_G2          = VK_TPREL    | VK_G2,
-    VK_TPREL_G1          = VK_TPREL    | VK_G1,
-    VK_TPREL_G1_NC       = VK_TPREL    | VK_G1      | VK_NC,
-    VK_TPREL_G0          = VK_TPREL    | VK_G0,
-    VK_TPREL_G0_NC       = VK_TPREL    | VK_G0      | VK_NC,
-    VK_TPREL_HI12        = VK_TPREL    | VK_HI12,
-    VK_TPREL_LO12        = VK_TPREL    | VK_PAGEOFF,
-    VK_TPREL_LO12_NC     = VK_TPREL    | VK_PAGEOFF | VK_NC,
-    VK_TLSDESC_LO12      = VK_TLSDESC  | VK_PAGEOFF,
-    VK_TLSDESC_PAGE      = VK_TLSDESC  | VK_PAGE,
-    VK_SECREL_LO12       = VK_SECREL   | VK_PAGEOFF,
-    VK_SECREL_HI12       = VK_SECREL   | VK_HI12,
+    VK_ABS_PAGE          = VK_ABS          | VK_PAGE,
+    VK_ABS_PAGE_NC       = VK_ABS          | VK_PAGE    | VK_NC,
+    VK_ABS_G3            = VK_ABS          | VK_G3,
+    VK_ABS_G2            = VK_ABS          | VK_G2,
+    VK_ABS_G2_S          = VK_SABS         | VK_G2,
+    VK_ABS_G2_NC         = VK_ABS          | VK_G2      | VK_NC,
+    VK_ABS_G1            = VK_ABS          | VK_G1,
+    VK_ABS_G1_S          = VK_SABS         | VK_G1,
+    VK_ABS_G1_NC         = VK_ABS          | VK_G1      | VK_NC,
+    VK_ABS_G0            = VK_ABS          | VK_G0,
+    VK_ABS_G0_S          = VK_SABS         | VK_G0,
+    VK_ABS_G0_NC         = VK_ABS          | VK_G0      | VK_NC,
+    VK_LO12              = VK_ABS          | VK_PAGEOFF | VK_NC,
+    VK_PREL_G3           = VK_PREL         | VK_G3,
+    VK_PREL_G2           = VK_PREL         | VK_G2,
+    VK_PREL_G2_NC        = VK_PREL         | VK_G2      | VK_NC,
+    VK_PREL_G1           = VK_PREL         | VK_G1,
+    VK_PREL_G1_NC        = VK_PREL         | VK_G1      | VK_NC,
+    VK_PREL_G0           = VK_PREL         | VK_G0,
+    VK_PREL_G0_NC        = VK_PREL         | VK_G0      | VK_NC,
+    VK_GOT_LO12          = VK_GOT          | VK_PAGEOFF | VK_NC,
+    VK_GOT_PAGE          = VK_GOT          | VK_PAGE,
+    VK_GOT_PAGE_LO15     = VK_GOT          | VK_LO15    | VK_NC,
+    VK_GOT_AUTH_LO12     = VK_GOT_AUTH     | VK_PAGEOFF | VK_NC,
+    VK_GOT_AUTH_PAGE     = VK_GOT_AUTH     | VK_PAGE,
+    VK_DTPREL_G2         = VK_DTPREL       | VK_G2,
+    VK_DTPREL_G1         = VK_DTPREL       | VK_G1,
+    VK_DTPREL_G1_NC      = VK_DTPREL       | VK_G1      | VK_NC,
+    VK_DTPREL_G0         = VK_DTPREL       | VK_G0,
+    VK_DTPREL_G0_NC      = VK_DTPREL       | VK_G0      | VK_NC,
+    VK_DTPREL_HI12       = VK_DTPREL       | VK_HI12,
+    VK_DTPREL_LO12       = VK_DTPREL       | VK_PAGEOFF,
+    VK_DTPREL_LO12_NC    = VK_DTPREL       | VK_PAGEOFF | VK_NC,
+    VK_GOTTPREL_PAGE     = VK_GOTTPREL     | VK_PAGE,
+    VK_GOTTPREL_LO12_NC  = VK_GOTTPREL     | VK_PAGEOFF | VK_NC,
+    VK_GOTTPREL_G1       = VK_GOTTPREL     | VK_G1,
+    VK_GOTTPREL_G0_NC    = VK_GOTTPREL     | VK_G0      | VK_NC,
+    VK_TPREL_G2          = VK_TPREL        | VK_G2,
+    VK_TPREL_G1          = VK_TPREL        | VK_G1,
+    VK_TPREL_G1_NC       = VK_TPREL        | VK_G1      | VK_NC,
+    VK_TPREL_G0          = VK_TPREL        | VK_G0,
+    VK_TPREL_G0_NC       = VK_TPREL        | VK_G0      | VK_NC,
+    VK_TPREL_HI12        = VK_TPREL        | VK_HI12,
+    VK_TPREL_LO12        = VK_TPREL        | VK_PAGEOFF,
+    VK_TPREL_LO12_NC     = VK_TPREL        | VK_PAGEOFF | VK_NC,
+    VK_TLSDESC_LO12      = VK_TLSDESC      | VK_PAGEOFF,
+    VK_TLSDESC_PAGE      = VK_TLSDESC      | VK_PAGE,
+    VK_TLSDESC_AUTH_LO12 = VK_TLSDESC_AUTH | VK_PAGEOFF,
+    VK_TLSDESC_AUTH_PAGE = VK_TLSDESC_AUTH | VK_PAGE,
+    VK_SECREL_LO12       = VK_SECREL       | VK_PAGEOFF,
+    VK_SECREL_HI12       = VK_SECREL       | VK_HI12,
 
     VK_INVALID  = 0xfff
     // clang-format on
diff --git a/llvm/test/MC/AArch64/arm64-elf-relocs.s b/llvm/test/MC/AArch64/arm64-elf-relocs.s
index 5c04e899a7b22e..6bf70043795d19 100644
--- a/llvm/test/MC/AArch64/arm64-elf-relocs.s
+++ b/llvm/test/MC/AArch64/arm64-elf-relocs.s
@@ -35,63 +35,75 @@
 // CHECK: add x5, x0, :tlsdesc_lo12:sym
 // CHECK-OBJ-LP64: 1c R_AARCH64_TLSDESC_ADD_LO12 sym
 
+   add x5, x0, #:tlsdesc_auth_lo12:sym
+// CHECK: add x5, x0, :tlsdesc_auth_lo12:sym
+// CHECK-OBJ-LP64: 20 R_AARCH64_AUTH_TLSDESC_ADD_LO12 sym
+
         add x0, x2, #:lo12:sym+8
 // CHECK: add x0, x2, :lo12:sym
-// CHECK-OBJ-LP64: 20 R_AARCH64_ADD_ABS_LO12_NC sym+0x8
+// CHECK-OBJ-LP64: 24 R_AARCH64_ADD_ABS_LO12_NC sym+0x8
 
    add x5, x7, #:dtprel_lo12:sym+1
 // CHECK: add x5, x7, :dtprel_lo12:sym+1
-// CHECK-OBJ-LP64: 24 R_AARCH64_TLSLD_ADD_DTPREL_LO12 sym+0x1
+// CHECK-OBJ-LP64: 28 R_AARCH64_TLSLD_ADD_DTPREL_LO12 sym+0x1
 
    add x9, x12, #:dtprel_lo12_nc:sym+2
 // CHECK: add x9, x12, :dtprel_lo12_nc:sym+2
-// CHECK-OBJ-LP64: 28 R_AARCH64_TLSLD_ADD_DTPREL_LO12_NC sym+0x2
+// CHECK-OBJ-LP64: 2c R_AARCH64_TLSLD_ADD_DTPREL_LO12_NC sym+0x2
 
    add x20, x30, #:tprel_lo12:sym+12
 // CHECK: add x20, x30, :tprel_lo12:sym+12
-// CHECK-OBJ-LP64: 2c R_AARCH64_TLSLE_ADD_TPREL_LO12 sym+0xc
+// CHECK-OBJ-LP64: 30 R_AARCH64_TLSLE_ADD_TPREL_LO12 sym+0xc
 
    add x9, x12, #:tprel_lo12_nc:sym+54
 // CHECK: add x9, x12, :tprel_lo12_nc:sym+54
-// CHECK-OBJ-LP64: 30 R_AARCH64_TLSLE_ADD_TPREL_LO12_NC sym+0x36
+// CHECK-OBJ-LP64: 34 R_AARCH64_TLSLE_ADD_TPREL_LO12_NC sym+0x36
 
    add x5, x0, #:tlsdesc_lo12:sym+70
 // CHECK: add x5, x0, :tlsdesc_lo12:sym+70
-// CHECK-OBJ-LP64: 34 R_AARCH64_TLSDESC_ADD_LO12 sym+0x46
+// CHECK-OBJ-LP64: 38 R_AARCH64_TLSDESC_ADD_LO12 sym+0x46
+
+   add x5, x0, #:tlsdesc_auth_lo12:sym+70
+// CHECK: add x5, x0, :tlsdesc_auth_lo12:sym+70
+// CHECK-OBJ-LP64: 3c R_AARCH64_AUTH_TLSDESC_ADD_LO12 sym+0x46
 
         .hword sym + 4 - .
-// CHECK-OBJ-LP64: 38 R_AARCH64_PREL16 sym+0x4
+// CHECK-OBJ-LP64: 40 R_AARCH64_PREL16 sym+0x4
         .word sym - . + 8
-// CHECK-OBJ-LP64: 3a R_AARCH64_PREL32 sym+0x8
+// CHECK-OBJ-LP64: 42 R_AARCH64_PREL32 sym+0x8
         .xword sym-.
-// CHECK-OBJ-LP64: 3e R_AARCH64_PREL64 sym{{$}}
+// CHECK-OBJ-LP64: 46 R_AARCH64_PREL64 sym{{$}}
 
         .hword sym
-// CHECK-OBJ-LP64: 46 R_AARCH64_ABS16 sym
+// CHECK-OBJ-LP64: 4e R_AARCH64_ABS16 sym
         .word sym+1
-// CHECK-OBJ-LP64: 48 R_AARCH64_ABS32 sym+0x1
+// CHECK-OBJ-LP64: 50 R_AARCH64_ABS32 sym+0x1
         .xword sym+16
-// CHECK-OBJ-LP64: 4c R_AARCH64_ABS64 sym+0x10
+// CHECK-OBJ-LP64: 54 R_AARCH64_ABS64 sym+0x10
 
    adrp x0, sym
 // CHECK: adrp x0, sym
-// CHECK-OBJ-LP64: 54 R_AARCH64_ADR_PREL_PG_HI21 sym
+// CHECK-OBJ-LP64: 5c R_AARCH64_ADR_PREL_PG_HI21 sym
 
    adrp x15, :got:sym
 // CHECK: adrp x15, :got:sym
-// CHECK-OBJ-LP64: 58 R_AARCH64_ADR_GOT_PAGE sym
+// CHECK-OBJ-LP64: 60 R_AARCH64_ADR_GOT_PAGE sym
 
    adrp x15, :got_auth:sym
 // CHECK: adrp x15, :got_auth:sym
-// CHECK-OBJ-LP64: 5c R_AARCH64_AUTH_ADR_GOT_PAGE sym
+// CHECK-OBJ-LP64: 64 R_AARCH64_AUTH_ADR_GOT_PAGE sym
 
    adrp x29, :gottprel:sym
 // CHECK: adrp x29, :gottprel:sym
-// CHECK-OBJ-LP64: 60 R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21 sym
+// CHECK-OBJ-LP64: 68 R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21 sym
 
    adrp x2, :tlsdesc:sym
 // CHECK: adrp x2, :tlsdesc:sym
-// CHECK-OBJ-LP64: 64 R_AARCH64_TLSDESC_ADR_PAGE21 sym
+// CHECK-OBJ-LP64: 6c R_AARCH64_TLSDESC_ADR_PAGE21 sym
+
+   adrp x2, :tlsdesc_auth:sym
+// CHECK: adrp x2, :tlsdesc_auth:sym
+// CHECK-OBJ-LP64: 70 R_AARCH64_AUTH_TLSDESC_ADR_PAGE21 sym
 
    // LLVM is not competent enough to do this relocation because the
    // page boundary could occur anywhere after linking. A relocation
@@ -100,7 +112,7 @@
    .global trickQuestion
 trickQuestion:
 // CHECK: adrp x3, trickQuestion
-// CHECK-OBJ-LP64: 68 R_AARCH64_ADR_PREL_PG_HI21 trickQuestion
+// CHECK-OBJ-LP64: 74 R_AARCH64_ADR_PREL_PG_HI21 trickQuestion
 
    ldrb w2, [x3, :lo12:sym]
    ldrsb w5, [x7, #:lo12:sym]
@@ -311,6 +323,13 @@ trickQuestion:
 // CHECK-OBJ-LP64: R_AARCH64_TLSDESC_LD64_LO12 sym
 // CHECK-OBJ-LP64: R_AARCH64_TLSDESC_LD64_LO12 sym
 
+   ldr x24, [x23, #:tlsdesc_auth_lo12:sym]
+   ldr d22, [x21, :tlsdesc_auth_lo12:sym]
+// CHECK: ldr x24, [x23, :tlsdesc_auth_lo12:sym]
+// CHECK: ldr d22, [x21, :tlsdesc_auth_lo12:sym]
+// CHECK-OBJ-LP64: R_AARCH64_AUTH_TLSDESC_LD64_LO12 sym
+// CHECK-OBJ-LP64: R_AARCH64_AUTH_TLSDESC_LD64_LO12 sym
+
    ldr q20, [x19, #:lo12:sym]
 // CHECK: ldr q20, [x19, :lo12:sym]
 // CHECK-OBJ-LP64: R_AARCH64_LDST128_ABS_LO12_NC sym
diff --git a/llvm/test/MC/AArch64/ilp32-diagnostics.s b/llvm/test/MC/AArch64/ilp32-diagnostics.s
index 3c22ff84b0d7ec..23c06a455261ef 100644
--- a/llvm/test/MC/AArch64/ilp32-diagnostics.s
+++ b/llvm/test/MC/AArch64/ilp32-diagnostics.s
@@ -93,3 +93,12 @@ ldr x24, :got_auth:sym
 
 adr x24, :got_auth:sym
 // ERROR: [[#@LINE-1]]:1: error: ILP32 ADR AUTH relocation not supported (LP64 eqv: AUTH_GOT_ADR_PREL_LO21)
+
+adrp x24, :tlsdesc_auth:sym
+// ERROR: [[#@LINE-1]]:1: error: ILP32 ADRP AUTH relocation not supported (LP64 eqv: AUTH_TLSDESC_ADR_PAGE21)
+
+ldr x24, [x23, :tlsdesc_auth_lo12:sym]
+// ERROR: [[#@LINE-1]]:1: error: ILP32 64-bit load/store AUTH relocation not supported (LP64 eqv: AUTH_TLSDESC_LD64_LO12)
+
+add x24, x23, :tlsdesc_auth_lo12:sym
+// ERROR: [[#@LINE-1]]:1: error: ILP32 ADD AUTH relocation not supported (LP64 eqv: AUTH_TLSDESC_ADD_LO12)



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