Revert "[llvm-readobj][AArch64][ELF][PAC] Support ELF AUTH constants" (#74816)

Reverts llvm/llvm-project#72713

Buildbot tests fail on clang-armv7-global-isel builder
https://lab.llvm.org/buildbot/#/builders/186/builds/13604

11 files changed, 26 insertions, 302 deletions

diff --git a/llvm/include/llvm/BinaryFormat/DynamicTags.def b/llvm/include/llvm/BinaryFormat/DynamicTags.def
index 1502d37..f393b82 100644
--- a/llvm/include/llvm/BinaryFormat/DynamicTags.def
+++ b/llvm/include/llvm/BinaryFormat/DynamicTags.def
@@ -132,12 +132,6 @@ AARCH64_DYNAMIC_TAG(AARCH64_MEMTAG_STACK, 0x7000000c)
 AARCH64_DYNAMIC_TAG(AARCH64_MEMTAG_GLOBALS, 0x7000000d)
 AARCH64_DYNAMIC_TAG(AARCH64_MEMTAG_GLOBALSSZ, 0x7000000f)
 
-// AArch64 specific dynamic table entries for RELR auth relocations as described here:
-// https://github.com/ARM-software/abi-aa/blob/main/pauthabielf64/pauthabielf64.rst#dynamic-section
-AARCH64_DYNAMIC_TAG(AARCH64_AUTH_RELRSZ, 0x70000011)
-AARCH64_DYNAMIC_TAG(AARCH64_AUTH_RELR, 0x70000012)
-AARCH64_DYNAMIC_TAG(AARCH64_AUTH_RELRENT, 0x70000013)
-
 // Hexagon specific dynamic table entries
 HEXAGON_DYNAMIC_TAG(HEXAGON_SYMSZ, 0x70000000)
 HEXAGON_DYNAMIC_TAG(HEXAGON_VER, 0x70000001)
diff --git a/llvm/include/llvm/BinaryFormat/ELF.h b/llvm/include/llvm/BinaryFormat/ELF.h
index 40c7954..d1ce8e2 100644
--- a/llvm/include/llvm/BinaryFormat/ELF.h
+++ b/llvm/include/llvm/BinaryFormat/ELF.h
@@ -1060,9 +1060,6 @@ enum : unsigned {
   SHT_ARM_ATTRIBUTES = 0x70000003U,
   SHT_ARM_DEBUGOVERLAY = 0x70000004U,
   SHT_ARM_OVERLAYSECTION = 0x70000005U,
-  // Special aarch64-specific section for MTE support, as described in:
-  // https://github.com/ARM-software/abi-aa/blob/main/pauthabielf64/pauthabielf64.rst#section-types
-  SHT_AARCH64_AUTH_RELR = 0x70000004U,
   // Special aarch64-specific sections for MTE support, as described in:
   // https://github.com/ARM-software/abi-aa/blob/main/memtagabielf64/memtagabielf64.rst#7section-types
   SHT_AARCH64_MEMTAG_GLOBALS_STATIC = 0x70000007U,
@@ -1650,11 +1647,6 @@ enum {
   NT_ANDROID_TYPE_MEMTAG = 4,
 };
 
-// ARM note types.
-enum {
-  NT_ARM_TYPE_PAUTH_ABI_TAG = 1,
-};
-
 // Memory tagging values used in NT_ANDROID_TYPE_MEMTAG notes.
 enum {
   // Enumeration to determine the tagging mode. In Android-land, 'SYNC' means
diff --git a/llvm/include/llvm/BinaryFormat/ELFRelocs/AArch64.def b/llvm/include/llvm/BinaryFormat/ELFRelocs/AArch64.def
index b8ab511..b507109 100644
--- a/llvm/include/llvm/BinaryFormat/ELFRelocs/AArch64.def
+++ b/llvm/include/llvm/BinaryFormat/ELFRelocs/AArch64.def
@@ -135,7 +135,6 @@ ELF_RELOC(R_AARCH64_TLS_TPREL64,                     0x406)
 ELF_RELOC(R_AARCH64_TLSDESC,                         0x407)
 ELF_RELOC(R_AARCH64_IRELATIVE,                       0x408)
 ELF_RELOC(R_AARCH64_AUTH_ABS64,                      0xe100)
-ELF_RELOC(R_AARCH64_AUTH_RELATIVE,                   0xe200)
 
 // ELF_RELOC(R_AARCH64_P32_NONE,                         0)
 ELF_RELOC(R_AARCH64_P32_ABS32,                       0x001)
diff --git a/llvm/lib/Object/ELF.cpp b/llvm/lib/Object/ELF.cpp
index 36847d1..1d73a6f 100644
--- a/llvm/lib/Object/ELF.cpp
+++ b/llvm/lib/Object/ELF.cpp
@@ -273,7 +273,6 @@ StringRef llvm::object::getELFSectionTypeName(uint32_t Machine, unsigned Type) {
     break;
   case ELF::EM_AARCH64:
     switch (Type) {
-      STRINGIFY_ENUM_CASE(ELF, SHT_AARCH64_AUTH_RELR);
       STRINGIFY_ENUM_CASE(ELF, SHT_AARCH64_MEMTAG_GLOBALS_DYNAMIC);
       STRINGIFY_ENUM_CASE(ELF, SHT_AARCH64_MEMTAG_GLOBALS_STATIC);
     }
diff --git a/llvm/lib/ObjectYAML/ELFYAML.cpp b/llvm/lib/ObjectYAML/ELFYAML.cpp
index c47d4ea..1da4ea4 100644
--- a/llvm/lib/ObjectYAML/ELFYAML.cpp
+++ b/llvm/lib/ObjectYAML/ELFYAML.cpp
@@ -719,7 +719,6 @@ void ScalarEnumerationTraits<ELFYAML::ELF_SHT>::enumeration(
     ECase(SHT_MSP430_ATTRIBUTES);
     break;
   case ELF::EM_AARCH64:
-    ECase(SHT_AARCH64_AUTH_RELR);
     ECase(SHT_AARCH64_MEMTAG_GLOBALS_STATIC);
     ECase(SHT_AARCH64_MEMTAG_GLOBALS_DYNAMIC);
     break;
diff --git a/llvm/test/tools/llvm-readobj/ELF/AArch64/aarch64-feature-pauth.s b/llvm/test/tools/llvm-readobj/ELF/AArch64/aarch64-feature-pauth.s
deleted file mode 100644
index f28d92e..0000000
--- a/llvm/test/tools/llvm-readobj/ELF/AArch64/aarch64-feature-pauth.s
+++ /dev/null
@@ -1,98 +0,0 @@
-# RUN: rm -rf %t && split-file %s %t && cd %t
-
-# RUN: llvm-mc -filetype=obj -triple=aarch64-linux-gnu abi-tag.s       -o tag.o
-# RUN: llvm-mc -filetype=obj -triple=aarch64-linux-gnu abi-tag-short.s -o tag-short.o
-# RUN: llvm-mc -filetype=obj -triple=aarch64-linux-gnu abi-tag-long.s  -o tag-long.o
-
-# RUN: llvm-readelf --notes tag.o       | FileCheck --check-prefix NORMAL %s
-# RUN: llvm-readelf --notes tag-short.o | FileCheck --check-prefix SHORT  %s
-# RUN: llvm-readelf --notes tag-long.o  | FileCheck --check-prefix LONG   %s
-
-# NORMAL: AArch64 PAuth ABI tag: platform 0x2a, version 0x1
-# SHORT:  AArch64 PAuth ABI tag: <corrupted size: expected at least 16, got 12>
-# LONG:   AArch64 PAuth ABI tag: platform 0x2a, version 0x1, additional info 0xEFCDAB8967452301
-
-# RUN: llvm-readobj --notes tag.o       | FileCheck --check-prefix LLVM-NORMAL %s
-# RUN: llvm-readobj --notes tag-short.o | FileCheck --check-prefix LLVM-SHORT %s
-# RUN: llvm-readobj --notes tag-long.o  | FileCheck --check-prefix LLVM-LONG %s
-
-# LLVM-SHORT:      Notes [
-# LLVM-SHORT-NEXT:   NoteSection {
-# LLVM-SHORT-NEXT:     Name: .note.AARCH64-PAUTH-ABI-tag
-# LLVM-SHORT-NEXT:     Offset: 0x40
-# LLVM-SHORT-NEXT:     Size: 0x1C
-# LLVM-SHORT-NEXT:     Note {
-# LLVM-SHORT-NEXT:       Owner: ARM
-# LLVM-SHORT-NEXT:       Data size: 0xC
-# LLVM-SHORT-NEXT:       Type: NT_ARM_TYPE_PAUTH_ABI_TAG
-# LLVM-SHORT-NEXT:       Description data (
-# LLVM-SHORT-NEXT:         0000: 2A000000 00000000 01000000
-# LLVM-SHORT-NEXT:       )
-# LLVM-SHORT-NEXT:     }
-# LLVM-SHORT-NEXT:   }
-# LLVM-SHORT-NEXT: ]
-
-# LLVM-NORMAL:      Notes [
-# LLVM-NORMAL-NEXT:   NoteSection {
-# LLVM-NORMAL-NEXT:     Name: .note.AARCH64-PAUTH-ABI-tag
-# LLVM-NORMAL-NEXT:     Offset: 0x40
-# LLVM-NORMAL-NEXT:     Size: 0x20
-# LLVM-NORMAL-NEXT:     Note {
-# LLVM-NORMAL-NEXT:       Owner: ARM
-# LLVM-NORMAL-NEXT:       Data size: 0x10
-# LLVM-NORMAL-NEXT:       Type: NT_ARM_TYPE_PAUTH_ABI_TAG
-# LLVM-NORMAL-NEXT:       Platform: 42
-# LLVM-NORMAL-NEXT:       Version: 1
-# LLVM-NORMAL-NEXT:     }
-# LLVM-NORMAL-NEXT:   }
-# LLVM-NORMAL-NEXT: ]
-
-# LLVM-LONG:      Notes [
-# LLVM-LONG-NEXT:   NoteSection {
-# LLVM-LONG-NEXT:     Name: .note.AARCH64-PAUTH-ABI-tag
-# LLVM-LONG-NEXT:     Offset: 0x40
-# LLVM-LONG-NEXT:     Size: 0x28
-# LLVM-LONG-NEXT:     Note {
-# LLVM-LONG-NEXT:       Owner: ARM
-# LLVM-LONG-NEXT:       Data size: 0x18
-# LLVM-LONG-NEXT:       Type: NT_ARM_TYPE_PAUTH_ABI_TAG
-# LLVM-LONG-NEXT:       Platform: 42
-# LLVM-LONG-NEXT:       Version: 1
-# LLVM-LONG-NEXT:       Additional info: EFCDAB8967452301
-# LLVM-LONG-NEXT:     }
-# LLVM-LONG-NEXT:   }
-# LLVM-LONG-NEXT: ]
-
-#--- abi-tag.s
-
-.section ".note.AARCH64-PAUTH-ABI-tag", "a"
-.long 4
-.long 16
-.long 1
-.asciz "ARM"
-
-.quad 42         // platform
-.quad 1          // version
-
-#--- abi-tag-short.s
-
-.section ".note.AARCH64-PAUTH-ABI-tag", "a"
-.long 4
-.long 12
-.long 1
-.asciz "ARM"
-
-.quad 42
-.word 1
-
-#--- abi-tag-long.s
-
-.section ".note.AARCH64-PAUTH-ABI-tag", "a"
-.long 4
-.long 24
-.long 1
-.asciz "ARM"
-
-.quad 42         // platform
-.quad 1          // version
-.quad 0x0123456789ABCDEF // extra data
diff --git a/llvm/test/tools/llvm-readobj/ELF/broken-dynamic-reloc.test b/llvm/test/tools/llvm-readobj/ELF/broken-dynamic-reloc.test
index f4899f6..1a1c6dd 100644
--- a/llvm/test/tools/llvm-readobj/ELF/broken-dynamic-reloc.test
+++ b/llvm/test/tools/llvm-readobj/ELF/broken-dynamic-reloc.test
@@ -459,43 +459,3 @@ ProgramHeaders:
   - Type:     PT_DYNAMIC
     FirstSec: .dynamic
     LastSec:  .dynamic
-
-## Show we print a warning for an invalid relocation table size stored in a DT_AARCH64_AUTH_RELRSZ entry.
-# RUN: yaml2obj --docnum=8 -DRELTYPE=RELR -DTAG1=DT_AARCH64_AUTH_RELRSZ -DTAG1VAL=0xFF -DTAG2=DT_AARCH64_AUTH_RELRENT %s -o %t14
-# RUN: llvm-readobj --dyn-relocations %t14 2>&1 | FileCheck %s -DFILE=%t14 --check-prefix=INVALID-DT-AARCH64-AUTH-RELRSZ
-# RUN: llvm-readelf --dyn-relocations %t14 2>&1 | FileCheck %s -DFILE=%t14 --check-prefix=INVALID-DT-AARCH64-AUTH-RELRSZ
-
-# INVALID-DT-AARCH64-AUTH-RELRSZ: warning: '[[FILE]]': invalid DT_AARCH64_AUTH_RELRSZ value (0xff) or DT_AARCH64_AUTH_RELRENT value (0x18)
-
-## Show we print a warning for an invalid relocation table entry size stored in a DT_AARCH64_AUTH_RELRENT entry.
-# RUN: yaml2obj --docnum=8 -DRELTYPE=RELR -DTAG1=DT_AARCH64_AUTH_RELRSZ -DTAG2=DT_AARCH64_AUTH_RELRENT -DTAG2VAL=0xFF %s -o %t15
-# RUN: llvm-readobj --dyn-relocations %t15 2>&1 | FileCheck %s -DFILE=%t15 --check-prefix=INVALID-DT-AARCH64-AUTH-RELRENT
-# RUN: llvm-readelf --dyn-relocations %t15 2>&1 | FileCheck %s -DFILE=%t15 --check-prefix=INVALID-DT-AARCH64-AUTH-RELRENT
-
-# INVALID-DT-AARCH64-AUTH-RELRENT: invalid DT_AARCH64_AUTH_RELRSZ value (0x18) or DT_AARCH64_AUTH_RELRENT value (0xff)
-
---- !ELF
-FileHeader:
-  Class: ELFCLASS64
-  Data:  ELFDATA2LSB
-  Type:  ET_DYN
-  Machine: EM_AARCH64
-Sections:
-  - Name:  .relx.dyn
-    Type:  SHT_[[RELTYPE]]
-  - Name: .dynamic
-    Type: SHT_DYNAMIC
-    Entries:
-      - Tag:   DT_[[RELTYPE]]
-        Value: 0x0
-      - Tag:   [[TAG1]]
-        Value: [[TAG1VAL=0x18]]
-      - Tag:   [[TAG2]]
-        Value: [[TAG2VAL=0x18]]
-      - Tag:   DT_NULL
-        Value: 0x0
-DynamicSymbols: []
-ProgramHeaders:
-  - Type:     PT_LOAD
-    FirstSec: .relx.dyn
-    LastSec:  .dynamic
diff --git a/llvm/test/tools/llvm-readobj/ELF/dynamic-tags-machine-specific.test b/llvm/test/tools/llvm-readobj/ELF/dynamic-tags-machine-specific.test
index e7bd9cf..c32ea33 100644
--- a/llvm/test/tools/llvm-readobj/ELF/dynamic-tags-machine-specific.test
+++ b/llvm/test/tools/llvm-readobj/ELF/dynamic-tags-machine-specific.test
@@ -355,26 +355,20 @@ ProgramHeaders:
 # RUN: llvm-readobj --dynamic-table %t.aarch64 | FileCheck %s --check-prefix=LLVM-AARCH64
 # RUN: llvm-readelf --dynamic-table %t.aarch64 | FileCheck %s --check-prefix=GNU-AARCH64
 
-# LLVM-AARCH64:     DynamicSection [ (7 entries)
+# LLVM-AARCH64:     DynamicSection [ (4 entries)
 # LLVM-AARCH64-NEXT:  Tag                Type                Name/Value
-# LLVM-AARCH64-NEXT:  0x0000000070000001 AARCH64_BTI_PLT      1
-# LLVM-AARCH64-NEXT:  0x0000000070000003 AARCH64_PAC_PLT      2
-# LLVM-AARCH64-NEXT:  0x0000000070000005 AARCH64_VARIANT_PCS  3
-# LLVM-AARCH64-NEXT:  0x0000000070000012 AARCH64_AUTH_RELR    0x4
-# LLVM-AARCH64-NEXT:  0x0000000070000011 AARCH64_AUTH_RELRSZ  5
-# LLVM-AARCH64-NEXT:  0x0000000070000013 AARCH64_AUTH_RELRENT 6
-# LLVM-AARCH64-NEXT:  0x0000000000000000 NULL                 0x0
+# LLVM-AARCH64-NEXT:  0x0000000070000001 AARCH64_BTI_PLT     1
+# LLVM-AARCH64-NEXT:  0x0000000070000003 AARCH64_PAC_PLT     2
+# LLVM-AARCH64-NEXT:  0x0000000070000005 AARCH64_VARIANT_PCS 3
+# LLVM-AARCH64-NEXT:  0x0000000000000000 NULL                0x0
 # LLVM-AARCH64-NEXT:]
 
-# GNU-AARCH64:      Dynamic section at offset {{.*}} contains 7 entries:
+# GNU-AARCH64:      Dynamic section at offset {{.*}} contains 4 entries:
 # GNU-AARCH64-NEXT:  Tag                Type                  Name/Value
-# GNU-AARCH64-NEXT:  0x0000000070000001 (AARCH64_BTI_PLT)      1
-# GNU-AARCH64-NEXT:  0x0000000070000003 (AARCH64_PAC_PLT)      2
-# GNU-AARCH64-NEXT:  0x0000000070000005 (AARCH64_VARIANT_PCS)  3
-# GNU-AARCH64-NEXT:  0x0000000070000012 (AARCH64_AUTH_RELR)    0x4
-# GNU-AARCH64-NEXT:  0x0000000070000011 (AARCH64_AUTH_RELRSZ)  5
-# GNU-AARCH64-NEXT:  0x0000000070000013 (AARCH64_AUTH_RELRENT) 6
-# GNU-AARCH64-NEXT:  0x0000000000000000 (NULL)                 0x0
+# GNU-AARCH64-NEXT:  0x0000000070000001 (AARCH64_BTI_PLT)     1
+# GNU-AARCH64-NEXT:  0x0000000070000003 (AARCH64_PAC_PLT)     2
+# GNU-AARCH64-NEXT:  0x0000000070000005 (AARCH64_VARIANT_PCS) 3
+# GNU-AARCH64-NEXT:  0x0000000000000000 (NULL)                0x0
 
 --- !ELF
 FileHeader:
@@ -392,12 +386,6 @@ Sections:
         Value: 2
       - Tag:   DT_AARCH64_VARIANT_PCS
         Value: 3
-      - Tag:   DT_AARCH64_AUTH_RELR
-        Value: 4
-      - Tag:   DT_AARCH64_AUTH_RELRSZ
-        Value: 5
-      - Tag:   DT_AARCH64_AUTH_RELRENT
-        Value: 6
       - Tag:   DT_NULL
         Value: 0
 ProgramHeaders:
diff --git a/llvm/test/tools/llvm-readobj/ELF/machine-specific-section-types.test b/llvm/test/tools/llvm-readobj/ELF/machine-specific-section-types.test
index f952438..99fafe3 100644
--- a/llvm/test/tools/llvm-readobj/ELF/machine-specific-section-types.test
+++ b/llvm/test/tools/llvm-readobj/ELF/machine-specific-section-types.test
@@ -53,14 +53,11 @@
 # MIPS-GNU: abiflags MIPS_ABIFLAGS
 # MIPS-GNU: dwarf    MIPS_DWARF
 
-# AARCH64-LLVM: Name: aarch64_auth_relr
-# AARCH64-LLVM: Type: SHT_AARCH64_AUTH_RELR
 # AARCH64-LLVM: Name: .memtag.globals.dynamic
 # AARCH64-LLVM: Type: SHT_AARCH64_MEMTAG_GLOBALS_DYNAMIC
 # AARCH64-LLVM: Name: .memtag.globals.static
 # AARCH64-LLVM: Type: SHT_AARCH64_MEMTAG_GLOBALS_STATIC
 
-# AARCH64-GNU: aarch64_auth_relr       AARCH64_AUTH_RELR
 # AARCH64-GNU: .memtag.globals.dynamic AARCH64_MEMTAG_GLOBALS_DYNAMIC
 # AARCH64-GNU: .memtag.globals.static  AARCH64_MEMTAG_GLOBALS_STATIC
 
@@ -116,8 +113,6 @@ FileHeader:
   Type:    ET_REL
   Machine: EM_AARCH64
 Sections:
-  - Name: aarch64_auth_relr
-    Type: SHT_AARCH64_AUTH_RELR
   - Name:  .memtag.globals.dynamic
     Type:  SHT_AARCH64_MEMTAG_GLOBALS_DYNAMIC
   - Name:  .memtag.globals.static
diff --git a/llvm/test/tools/llvm-readobj/ELF/relr-relocs.test b/llvm/test/tools/llvm-readobj/ELF/relr-relocs.test
index 91b148e..3bb54b1 100644
--- a/llvm/test/tools/llvm-readobj/ELF/relr-relocs.test
+++ b/llvm/test/tools/llvm-readobj/ELF/relr-relocs.test
@@ -158,7 +158,7 @@ Sections:
     Link:    [[LINK=<none>]]
 
 ## Check we report a warning when we are unable to dump relocations
-## for a SHT_RELR/SHT_ANDROID_RELR/SHT_AARCH64_AUTH_RELR section.
+## for a SHT_RELR/SHT_ANDROID_RELR section.
 
 ## Case A: check the case when relocations can't be read from an SHT_RELR section.
 # RUN: yaml2obj --docnum=2 -DENTSIZE=1 %s -o %t2.broken
@@ -186,20 +186,7 @@ Sections:
 # RUN: llvm-readelf --relocations %t2.broken.android 2>&1 | \
 # RUN:   FileCheck -DFILE=%t2.broken.android --check-prefix=BROKEN-GNU %s -DSECNAME=SHT_ANDROID_RELR
 
-## Case C: check the case when we have an SHT_AARCH64_AUTH_RELR section in non-AArch64 ELF.
-##         SHT_AARCH64_AUTH_RELR = 0x70000004.
-# RUN: yaml2obj --docnum=2 -DENTSIZE=1 -DSHTYPE=0x70000004 %s -o %t2.broken.aarch64auth
-# RUN: llvm-readobj --relocations %t2.broken.aarch64auth 2>&1 | \
-# RUN:   FileCheck -DFILE=%t2.broken.aarch64auth --check-prefix=WRONGARCH-LLVM-AARCH64-AUTH %s -DSECNAME=SHT_AARCH64_AUTH_RELR
-# RUN: llvm-readelf --relocations %t2.broken.aarch64auth 2>&1 | \
-# RUN:   FileCheck -DFILE=%t2.broken.aarch64auth --check-prefix=WRONGARCH-GNU-AARCH64-AUTH %s -DSECNAME=SHT_AARCH64_AUTH_RELR
-
-# WRONGARCH-LLVM-AARCH64-AUTH:      Relocations [
-# WRONGARCH-LLVM-AARCH64-AUTH-NEXT: ]
-
-# WRONGARCH-GNU-AARCH64-AUTH-NOT:  Relocation section
-
-## Check the behavior when the sh_link field of the SHT_RELR/SHT_ANDROID_RELR/SHT_AARCH64_AUTH_RELR section
+## Check the behavior when the sh_link field of the SHT_RELR/SHT_ANDROID_RELR section
 ## is set to an arbitrary value. Normally, it is set to 0, because such sections contains
 ## only relative relocations and do not have an associated symbol table, like other
 ## relocation sections.
diff --git a/llvm/tools/llvm-readobj/ELFDumper.cpp b/llvm/tools/llvm-readobj/ELFDumper.cpp
index 3e20edf..d6d0ea3 100644
--- a/llvm/tools/llvm-readobj/ELFDumper.cpp
+++ b/llvm/tools/llvm-readobj/ELFDumper.cpp
@@ -2027,18 +2027,6 @@ template <typename ELFT> void ELFDumper<ELFT>::parseDynamicTable() {
   uint64_t StringTableSize = 0;
   std::optional<DynRegionInfo> DynSymFromTable;
   for (const Elf_Dyn &Dyn : dynamic_table()) {
-    if (Obj.getHeader().e_machine == EM_AARCH64) {
-      switch (Dyn.d_tag) {
-      case ELF::DT_AARCH64_AUTH_RELRSZ:
-        DynRelrRegion.Size = Dyn.getVal();
-        DynRelrRegion.SizePrintName = "DT_AARCH64_AUTH_RELRSZ value";
-        continue;
-      case ELF::DT_AARCH64_AUTH_RELRENT:
-        DynRelrRegion.EntSize = Dyn.getVal();
-        DynRelrRegion.EntSizePrintName = "DT_AARCH64_AUTH_RELRENT value";
-        continue;
-      }
-    }
     switch (Dyn.d_tag) {
     case ELF::DT_HASH:
       HashTable = reinterpret_cast<const Elf_Hash *>(
@@ -2102,12 +2090,10 @@ template <typename ELFT> void ELFDumper<ELFT>::parseDynamicTable() {
       break;
     case ELF::DT_RELR:
     case ELF::DT_ANDROID_RELR:
-    case ELF::DT_AARCH64_AUTH_RELR:
       DynRelrRegion.Addr = toMappedAddr(Dyn.getTag(), Dyn.getPtr());
       break;
     case ELF::DT_RELRSZ:
     case ELF::DT_ANDROID_RELRSZ:
-    case ELF::DT_AARCH64_AUTH_RELRSZ:
       DynRelrRegion.Size = Dyn.getVal();
       DynRelrRegion.SizePrintName = Dyn.d_tag == ELF::DT_RELRSZ
                                         ? "DT_RELRSZ value"
@@ -2115,7 +2101,6 @@ template <typename ELFT> void ELFDumper<ELFT>::parseDynamicTable() {
       break;
     case ELF::DT_RELRENT:
     case ELF::DT_ANDROID_RELRENT:
-    case ELF::DT_AARCH64_AUTH_RELRENT:
       DynRelrRegion.EntSize = Dyn.getVal();
       DynRelrRegion.EntSizePrintName = Dyn.d_tag == ELF::DT_RELRENT
                                            ? "DT_RELRENT value"
@@ -2482,8 +2467,6 @@ std::string ELFDumper<ELFT>::getDynamicEntry(uint64_t Type,
   case DT_PREINIT_ARRAYSZ:
   case DT_RELRSZ:
   case DT_RELRENT:
-  case DT_AARCH64_AUTH_RELRSZ:
-  case DT_AARCH64_AUTH_RELRENT:
   case DT_ANDROID_RELSZ:
   case DT_ANDROID_RELASZ:
     return std::to_string(Value) + " (bytes)";
@@ -3816,12 +3799,9 @@ void GNUELFDumper<ELFT>::printRelRelaReloc(const Relocation<ELFT> &R,
 }
 
 template <class ELFT>
-static void printRelocHeaderFields(formatted_raw_ostream &OS, unsigned SType,
-                                   const typename ELFT::Ehdr &EHeader) {
+static void printRelocHeaderFields(formatted_raw_ostream &OS, unsigned SType) {
   bool IsRela = SType == ELF::SHT_RELA || SType == ELF::SHT_ANDROID_RELA;
-  bool IsRelr =
-      SType == ELF::SHT_RELR || SType == ELF::SHT_ANDROID_RELR ||
-      (EHeader.e_machine == EM_AARCH64 && SType == ELF::SHT_AARCH64_AUTH_RELR);
+  bool IsRelr = SType == ELF::SHT_RELR || SType == ELF::SHT_ANDROID_RELR;
   if (ELFT::Is64Bits)
     OS << "    ";
   else
@@ -3846,18 +3826,15 @@ void GNUELFDumper<ELFT>::printDynamicRelocHeader(unsigned Type, StringRef Name,
   uint64_t Offset = Reg.Addr - this->Obj.base();
   OS << "\n'" << Name.str().c_str() << "' relocation section at offset 0x"
      << utohexstr(Offset, /*LowerCase=*/true) << " contains " << Reg.Size << " bytes:\n";
-  printRelocHeaderFields<ELFT>(OS, Type, this->Obj.getHeader());
+  printRelocHeaderFields<ELFT>(OS, Type);
 }
 
 template <class ELFT>
-static bool isRelocationSec(const typename ELFT::Shdr &Sec,
-                            const typename ELFT::Ehdr &EHeader) {
+static bool isRelocationSec(const typename ELFT::Shdr &Sec) {
   return Sec.sh_type == ELF::SHT_REL || Sec.sh_type == ELF::SHT_RELA ||
          Sec.sh_type == ELF::SHT_RELR || Sec.sh_type == ELF::SHT_ANDROID_REL ||
          Sec.sh_type == ELF::SHT_ANDROID_RELA ||
-         Sec.sh_type == ELF::SHT_ANDROID_RELR ||
-         (EHeader.e_machine == EM_AARCH64 &&
-          Sec.sh_type == ELF::SHT_AARCH64_AUTH_RELR);
+         Sec.sh_type == ELF::SHT_ANDROID_RELR;
 }
 
 template <class ELFT> void GNUELFDumper<ELFT>::printRelocations() {
@@ -3873,10 +3850,8 @@ template <class ELFT> void GNUELFDumper<ELFT>::printRelocations() {
       return RelasOrErr->size();
     }
 
-    if (!opts::RawRelr &&
-        (Sec.sh_type == ELF::SHT_RELR || Sec.sh_type == ELF::SHT_ANDROID_RELR ||
-         (this->Obj.getHeader().e_machine == EM_AARCH64 &&
-          Sec.sh_type == ELF::SHT_AARCH64_AUTH_RELR))) {
+    if (!opts::RawRelr && (Sec.sh_type == ELF::SHT_RELR ||
+                           Sec.sh_type == ELF::SHT_ANDROID_RELR)) {
       Expected<Elf_Relr_Range> RelrsOrErr = this->Obj.relrs(Sec);
       if (!RelrsOrErr)
         return RelrsOrErr.takeError();
@@ -3888,7 +3863,7 @@ template <class ELFT> void GNUELFDumper<ELFT>::printRelocations() {
 
   bool HasRelocSections = false;
   for (const Elf_Shdr &Sec : cantFail(this->Obj.sections())) {
-    if (!isRelocationSec<ELFT>(Sec, this->Obj.getHeader()))
+    if (!isRelocationSec<ELFT>(Sec))
       continue;
     HasRelocSections = true;
 
@@ -3905,7 +3880,7 @@ template <class ELFT> void GNUELFDumper<ELFT>::printRelocations() {
     OS << "\nRelocation section '" << Name << "' at offset 0x"
        << utohexstr(Offset, /*LowerCase=*/true) << " contains " << EntriesNum
        << " entries:\n";
-    printRelocHeaderFields<ELFT>(OS, Sec.sh_type, this->Obj.getHeader());
+    printRelocHeaderFields<ELFT>(OS, Sec.sh_type);
     this->printRelocationsHelper(Sec);
   }
   if (!HasRelocSections)
@@ -5338,31 +5313,6 @@ static bool printAndroidNote(raw_ostream &OS, uint32_t NoteType,
 }
 
 template <class ELFT>
-static bool printAArch64Note(raw_ostream &OS, uint32_t NoteType,
-                             ArrayRef<uint8_t> Desc) {
-  if (NoteType != NT_ARM_TYPE_PAUTH_ABI_TAG)
-    return false;
-
-  OS << "    AArch64 PAuth ABI tag: ";
-  if (Desc.size() < 16) {
-    OS << format("<corrupted size: expected at least 16, got %d>", Desc.size());
-    return false;
-  }
-
-  uint64_t Platform =
-      support::endian::read64<ELFT::TargetEndianness>(Desc.data() + 0);
-  uint64_t Version =
-      support::endian::read64<ELFT::TargetEndianness>(Desc.data() + 8);
-  OS << format("platform 0x%x, version 0x%x", Platform, Version);
-
-  if (Desc.size() > 16)
-    OS << ", additional info 0x"
-       << toHex(ArrayRef<uint8_t>(Desc.data() + 16, Desc.size() - 16));
-
-  return true;
-}
-
-template <class ELFT>
 void GNUELFDumper<ELFT>::printMemtag(
     const ArrayRef<std::pair<std::string, std::string>> DynamicEntries,
     const ArrayRef<uint8_t> AndroidNoteDesc,
@@ -5761,10 +5711,6 @@ const NoteType AndroidNoteTypes[] = {
      "NT_ANDROID_TYPE_MEMTAG (Android memory tagging information)"},
 };
 
-const NoteType ARMNoteTypes[] = {
-    {ELF::NT_ARM_TYPE_PAUTH_ABI_TAG, "NT_ARM_TYPE_PAUTH_ABI_TAG"},
-};
-
 const NoteType CoreNoteTypes[] = {
     {ELF::NT_PRSTATUS, "NT_PRSTATUS (prstatus structure)"},
     {ELF::NT_FPREGSET, "NT_FPREGSET (floating point registers)"},
@@ -5883,8 +5829,6 @@ StringRef getNoteTypeName(const typename ELFT::Note &Note, unsigned ELFType) {
     return FindNote(LLVMOMPOFFLOADNoteTypes);
   if (Name == "Android")
     return FindNote(AndroidNoteTypes);
-  if (Name == "ARM")
-    return FindNote(ARMNoteTypes);
 
   if (ELFType == ELF::ET_CORE)
     return FindNote(CoreNoteTypes);
@@ -6040,9 +5984,6 @@ template <class ELFT> void GNUELFDumper<ELFT>::printNotes() {
     } else if (Name == "Android") {
       if (printAndroidNote(OS, Type, Descriptor))
         return Error::success();
-    } else if (Name == "ARM") {
-      if (printAArch64Note<ELFT>(OS, Type, Descriptor))
-        return Error::success();
     }
     if (!Descriptor.empty()) {
       OS << "   description data:";
@@ -6235,13 +6176,11 @@ void ELFDumper<ELFT>::forEachRelocationDo(
                               toString(std::move(E)));
   };
 
-  // SHT_RELR/SHT_ANDROID_RELR/SHT_AARCH64_AUTH_RELR sections do not have an
-  // associated symbol table. For them we should not treat the value of the
-  // sh_link field as an index of a symbol table.
+  // SHT_RELR/SHT_ANDROID_RELR sections do not have an associated symbol table.
+  // For them we should not treat the value of the sh_link field as an index of
+  // a symbol table.
   const Elf_Shdr *SymTab;
-  if (Sec.sh_type != ELF::SHT_RELR && Sec.sh_type != ELF::SHT_ANDROID_RELR &&
-      !(Obj.getHeader().e_machine == EM_AARCH64 &&
-        Sec.sh_type == ELF::SHT_AARCH64_AUTH_RELR)) {
+  if (Sec.sh_type != ELF::SHT_RELR && Sec.sh_type != ELF::SHT_ANDROID_RELR) {
     Expected<const Elf_Shdr *> SymTabOrErr = Obj.getSection(Sec.sh_link);
     if (!SymTabOrErr) {
       Warn(SymTabOrErr.takeError(), "unable to locate a symbol table for");
@@ -6269,10 +6208,6 @@ void ELFDumper<ELFT>::forEachRelocationDo(
       Warn(RangeOrErr.takeError());
     }
     break;
-  case ELF::SHT_AARCH64_AUTH_RELR:
-    if (Obj.getHeader().e_machine != EM_AARCH64)
-      break;
-    [[fallthrough]];
   case ELF::SHT_RELR:
   case ELF::SHT_ANDROID_RELR: {
     Expected<Elf_Relr_Range> RangeOrErr = Obj.relrs(Sec);
@@ -6969,7 +6904,7 @@ template <class ELFT> void LLVMELFDumper<ELFT>::printRelocations() {
   ListScope D(W, "Relocations");
 
   for (const Elf_Shdr &Sec : cantFail(this->Obj.sections())) {
-    if (!isRelocationSec<ELFT>(Sec, this->Obj.getHeader()))
+    if (!isRelocationSec<ELFT>(Sec))
       continue;
 
     StringRef Name = this->getPrintableSectionName(Sec);
@@ -7611,29 +7546,6 @@ static bool printAndroidNoteLLVMStyle(uint32_t NoteType, ArrayRef<uint8_t> Desc,
 }
 
 template <class ELFT>
-static bool printAarch64NoteLLVMStyle(uint32_t NoteType, ArrayRef<uint8_t> Desc,
-                                      ScopedPrinter &W) {
-  if (NoteType != NT_ARM_TYPE_PAUTH_ABI_TAG)
-    return false;
-
-  if (Desc.size() < 16)
-    return false;
-
-  uint64_t platform =
-      support::endian::read64<ELFT::TargetEndianness>(Desc.data() + 0);
-  uint64_t version =
-      support::endian::read64<ELFT::TargetEndianness>(Desc.data() + 8);
-  W.printNumber("Platform", platform);
-  W.printNumber("Version", version);
-
-  if (Desc.size() > 16)
-    W.printString("Additional info",
-                  toHex(ArrayRef<uint8_t>(Desc.data() + 16, Desc.size() - 16)));
-
-  return true;
-}
-
-template <class ELFT>
 void LLVMELFDumper<ELFT>::printMemtag(
     const ArrayRef<std::pair<std::string, std::string>> DynamicEntries,
     const ArrayRef<uint8_t> AndroidNoteDesc,
@@ -7769,9 +7681,6 @@ template <class ELFT> void LLVMELFDumper<ELFT>::printNotes() {
     } else if (Name == "Android") {
       if (printAndroidNoteLLVMStyle(Type, Descriptor, W))
         return Error::success();
-    } else if (Name == "ARM") {
-      if (printAarch64NoteLLVMStyle<ELFT>(Type, Descriptor, W))
-        return Error::success();
     }
     if (!Descriptor.empty()) {
       W.printBinaryBlock("Description data", Descriptor);