[llvm] [llvm-readobj][AArch64][ELF][PAC] Support ELF AUTH constants (PR #74874)
via llvm-commits
llvm-commits at lists.llvm.org
Fri Dec 8 09:42:35 PST 2023
llvmbot wrote:
<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-llvm-binary-utilities
Author: Daniil Kovalev (kovdan01)
<details>
<summary>Changes</summary>
Reapply llvm/llvm-project#<!-- -->72713 after fixing formatted printing of `uint64_t` values as hex (see failing build here https://lab.llvm.org/buildbot/#/builders/186/builds/13604).
This patch adds llvm-readobj support for:
- Dynamic `R_AARCH64_AUTH_*` relocations (including RELR compressed AUTH relocations) as described here: https://github.com/ARM-software/abi-aa/blob/main/pauthabielf64/pauthabielf64.rst#auth-variant-dynamic-relocations
- `.note.AARCH64-PAUTH-ABI-tag` section as defined here https://github.com/ARM-software/abi-aa/blob/main/pauthabielf64/pauthabielf64.rst#elf-marking
---
Patch is 25.77 KiB, truncated to 20.00 KiB below, full version: https://github.com/llvm/llvm-project/pull/74874.diff
11 Files Affected:
- (modified) llvm/include/llvm/BinaryFormat/DynamicTags.def (+6)
- (modified) llvm/include/llvm/BinaryFormat/ELF.h (+8)
- (modified) llvm/include/llvm/BinaryFormat/ELFRelocs/AArch64.def (+1)
- (modified) llvm/lib/Object/ELF.cpp (+1)
- (modified) llvm/lib/ObjectYAML/ELFYAML.cpp (+1)
- (added) llvm/test/tools/llvm-readobj/ELF/AArch64/aarch64-feature-pauth.s (+98)
- (modified) llvm/test/tools/llvm-readobj/ELF/broken-dynamic-reloc.test (+40)
- (modified) llvm/test/tools/llvm-readobj/ELF/dynamic-tags-machine-specific.test (+22-10)
- (modified) llvm/test/tools/llvm-readobj/ELF/machine-specific-section-types.test (+5)
- (modified) llvm/test/tools/llvm-readobj/ELF/relr-relocs.test (+15-2)
- (modified) llvm/tools/llvm-readobj/ELFDumper.cpp (+105-14)
``````````diff
diff --git a/llvm/include/llvm/BinaryFormat/DynamicTags.def b/llvm/include/llvm/BinaryFormat/DynamicTags.def
index f393b82406b41d..1502d375f5c45d 100644
--- a/llvm/include/llvm/BinaryFormat/DynamicTags.def
+++ b/llvm/include/llvm/BinaryFormat/DynamicTags.def
@@ -132,6 +132,12 @@ 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 d1ce8e20b4be73..40c795410f95ad 100644
--- a/llvm/include/llvm/BinaryFormat/ELF.h
+++ b/llvm/include/llvm/BinaryFormat/ELF.h
@@ -1060,6 +1060,9 @@ 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,
@@ -1647,6 +1650,11 @@ 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 b507109b19e1b9..b8ab5113bedf80 100644
--- a/llvm/include/llvm/BinaryFormat/ELFRelocs/AArch64.def
+++ b/llvm/include/llvm/BinaryFormat/ELFRelocs/AArch64.def
@@ -135,6 +135,7 @@ 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 1d73a6ffa73f5f..36847d1a2a4223 100644
--- a/llvm/lib/Object/ELF.cpp
+++ b/llvm/lib/Object/ELF.cpp
@@ -273,6 +273,7 @@ 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 1da4ea4e3edc91..c47d4eaa309dcd 100644
--- a/llvm/lib/ObjectYAML/ELFYAML.cpp
+++ b/llvm/lib/ObjectYAML/ELFYAML.cpp
@@ -719,6 +719,7 @@ 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
new file mode 100644
index 00000000000000..f28d92eae85754
--- /dev/null
+++ b/llvm/test/tools/llvm-readobj/ELF/AArch64/aarch64-feature-pauth.s
@@ -0,0 +1,98 @@
+# 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 1a1c6dd4d0d1c2..f4899f6df65131 100644
--- a/llvm/test/tools/llvm-readobj/ELF/broken-dynamic-reloc.test
+++ b/llvm/test/tools/llvm-readobj/ELF/broken-dynamic-reloc.test
@@ -459,3 +459,43 @@ 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 c32ea33b9b3cbf..e7bd9cf9b48b23 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
@@ -355,20 +355,26 @@ 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 [ (4 entries)
+# LLVM-AARCH64: DynamicSection [ (7 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: 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: 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:]
-# GNU-AARCH64: Dynamic section at offset {{.*}} contains 4 entries:
+# GNU-AARCH64: Dynamic section at offset {{.*}} contains 7 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: 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: 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
--- !ELF
FileHeader:
@@ -386,6 +392,12 @@ 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 99fafe35fa4433..f9524383e80b6d 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
@@ -53,11 +53,14 @@
# 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
@@ -113,6 +116,8 @@ 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 3bb54b1adc1f4f..91b148ebb6e3c8 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 section.
+## for a SHT_RELR/SHT_ANDROID_RELR/SHT_AARCH64_AUTH_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
@@ -186,7 +186,20 @@ 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
-## Check the behavior when the sh_link field of the SHT_RELR/SHT_ANDROID_RELR section
+## 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
## 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 d6d0ea35044ab3..85d5ab68b495c3 100644
--- a/llvm/tools/llvm-readobj/ELFDumper.cpp
+++ b/llvm/tools/llvm-readobj/ELFDumper.cpp
@@ -2027,6 +2027,18 @@ 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 *>(
@@ -2090,10 +2102,12 @@ 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"
@@ -2101,6 +2115,7 @@ 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"
@@ -2467,6 +2482,8 @@ 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)";
@@ -3799,9 +3816,12 @@ void GNUELFDumper<ELFT>::printRelRelaReloc(const Relocation<ELFT> &R,
}
template <class ELFT>
-static void printRelocHeaderFields(formatted_raw_ostream &OS, unsigned SType) {
+static void printRelocHeaderFields(formatted_raw_ostream &OS, unsigned SType,
+ const typename ELFT::Ehdr &EHeader) {
bool IsRela = SType == ELF::SHT_RELA || SType == ELF::SHT_ANDROID_RELA;
- bool IsRelr = SType == ELF::SHT_RELR || SType == ELF::SHT_ANDROID_RELR;
+ bool IsRelr =
+ SType == ELF::SHT_RELR || SType == ELF::SHT_ANDROID_RELR ||
+ (EHeader.e_machine == EM_AARCH64 && SType == ELF::SHT_AARCH64_AUTH_RELR);
if (ELFT::Is64Bits)
OS << " ";
else
@@ -3826,15 +3846,18 @@ 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);
+ printRelocHeaderFields<ELFT>(OS, Type, this->Obj.getHeader());
}
template <class ELFT>
-static bool isRelocationSec(const typename ELFT::Shdr &Sec) {
+static bool isRelocationSec(const typename ELFT::Shdr &Sec,
+ const typename ELFT::Ehdr &EHeader) {
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;
+ Sec.sh_type == ELF::SHT_ANDROID_RELR ||
+ (EHeader.e_machine == EM_AARCH64 &&
+ Sec.sh_type == ELF::SHT_AARCH64_AUTH_RELR);
}
template <class ELFT> void GNUELFDumper<ELFT>::printRelocations() {
@@ -3850,8 +3873,10 @@ 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)) {
+ 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))) {
Expected<Elf_Relr_Range> RelrsOrErr = this->Obj.relrs(Sec);
if (!RelrsOrErr)
return RelrsOrErr.takeError();
@@ -3863,7 +3888,7 @@ template <class ELFT> void GNUELFDumper<ELFT>::printRelocations() {
bool HasRelocSections = false;
for (const Elf_Shdr &Sec : cantFail(this->Obj.sections())) {
- if (!isRelocationSec<ELFT>(Sec))
+ if (!isRel...
[truncated]
``````````
</details>
https://github.com/llvm/llvm-project/pull/74874
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