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smithp35 merged 1 commit into from
Aug 25, 2026
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[AAELF64] Add section types from ELF extension documents #418

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79 changes: 47 additions & 32 deletions aaelf64/aaelf64.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -11,6 +11,8 @@

.. _AAPCS64: https://github.com/ARM-software/abi-aa/releases
.. _Addenda32: https://github.com/ARM-software/abi-aa/releases
.. _BuildAttr64: https://github.com/ARM-software/abi-aa/releases
.. _MemtagABIELF64: https://github.com/ARM-software/abi-aa/releases
.. _PAuthABIELF64: https://github.com/ARM-software/abi-aa/releases
.. _SCO-ELF: http://www.sco.com/developers/gabi/
.. _LINUX_ABI: https://github.com/hjl-tools/linux-abi/wiki
Expand Down Expand Up @@ -303,6 +305,9 @@ changes to the content of the document for that release.
| 2026Q2 | 29\ :sup:`th` | - In `Call and Jump relocations`_ make |
| | | pc-relative relocaions signed. |
+---------------+--------------------+-----------------------------------------+
| 2026Q3 | 13\ :sup:`th` | - Add new section types defined in ELF |
| | | extension documents |
+---------------+--------------------+-----------------------------------------+

References
----------
Expand All @@ -311,33 +316,37 @@ This document refers to, or is referred to by, the following documents.

.. table::

+----------------+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------+
| Ref | External reference or URL | Title |
+================+===================================================================================================+=============================================================================+
| AAELF64 | Source for this document | ELF for the Arm 64-bit Architecture (AArch64). |
+----------------+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------+
| AAPCS64_ | IHI 0055 | Procedure Call Standard for the Arm 64-bit Architecture |
+----------------+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------+
| Addenda32_ | IHI 0045 | Addenda to, and Errata in, the ABI for the Arm Architecture |
+----------------+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------+
| PAuthABIELF64_ | pauthabielf64 | PAuth Extension to ELF for the Arm 64-bit Architecture |
+----------------+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------+
| LSB_ | http://www.linuxbase.org/ | Linux Standards Base |
+----------------+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------+
| SCO-ELF_ | http://www.sco.com/developers/gabi/ | System V Application Binary Interface – DRAFT |
+----------------+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------+
| LINUX_ABI_ | https://github.com/hjl-tools/linux-abi/wiki | Linux Extensions to gABI |
+----------------+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------+
| STRUCTPROT_ | https://discourse.llvm.org/t/rfc-structure-protection-a-family-of-uaf-mitigation-techniques/85555 | Structure Field Protection |
+----------------+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------+
| SYM-VER_ | http://people.redhat.com/drepper/symbol-versioning | GNU Symbol Versioning |
+----------------+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------+
| TLSDESC_ | http://www.fsfla.org/~lxoliva/writeups/TLS/paper-lk2006.pdf | TLS Descriptors for Arm. Original proposal document |
+----------------+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------+
| MTEEXTENSIONS_ | https://www.kernel.org/doc/html/latest/arch/arm64/memory-tagging-extension.html#core-dump-support | Linux Kernel MTE core dump format |
+----------------+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------+
| SYSVABI64_ | sysvabi64 | System V Application Binary Interface (ABI) for the Arm 64-bit Architecture |
+----------------+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------+
+-----------------+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------+
| Ref | External reference or URL | Title |
+=================+===================================================================================================+=============================================================================+
| AAELF64 | Source for this document | ELF for the Arm 64-bit Architecture (AArch64). |
+-----------------+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------+
| AAPCS64_ | IHI 0055 | Procedure Call Standard for the Arm 64-bit Architecture |
+-----------------+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------+
| Addenda32_ | IHI 0045 | Addenda to, and Errata in, the ABI for the Arm Architecture |
+-----------------+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------+
| BuildAttr64_ | buildattr64 | Build Attributes for the Arm 64-bit Architecture |
+-----------------+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------+
| MemtagABIELF64_ | memtagabielf64 | Memtag ABI Extension to ELF for the Arm 64-bit Architecture |
+-----------------+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------+
| PAuthABIELF64_ | pauthabielf64 | PAuth Extension to ELF for the Arm 64-bit Architecture |
+-----------------+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------+
| LSB_ | http://www.linuxbase.org/ | Linux Standards Base |
+-----------------+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------+
| SCO-ELF_ | http://www.sco.com/developers/gabi/ | System V Application Binary Interface – DRAFT |
+-----------------+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------+
| LINUX_ABI_ | https://github.com/hjl-tools/linux-abi/wiki | Linux Extensions to gABI |
+-----------------+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------+
| STRUCTPROT_ | https://discourse.llvm.org/t/rfc-structure-protection-a-family-of-uaf-mitigation-techniques/85555 | Structure Field Protection |
+-----------------+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------+
| SYM-VER_ | http://people.redhat.com/drepper/symbol-versioning | GNU Symbol Versioning |
+-----------------+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------+
| TLSDESC_ | http://www.fsfla.org/~lxoliva/writeups/TLS/paper-lk2006.pdf | TLS Descriptors for Arm. Original proposal document |
+-----------------+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------+
| MTEEXTENSIONS_ | https://www.kernel.org/doc/html/latest/arch/arm64/memory-tagging-extension.html#core-dump-support | Linux Kernel MTE core dump format |
+-----------------+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------+
| SYSVABI64_ | sysvabi64 | System V Application Binary Interface (ABI) for the Arm 64-bit Architecture |
+-----------------+---------------------------------------------------------------------------------------------------+-----------------------------------------------------------------------------+

Terms and abbreviations
-----------------------
Expand Down Expand Up @@ -638,11 +647,17 @@ The defined processor-specific section types are listed in the below table. All

.. table:: Processor specific section types

+----------------------------+-----------------+----------------------------------------------------+
| Name | Value | Comment |
+============================+=================+====================================================+
| ``SHT_AARCH64_ATTRIBUTES`` | ``0x70000003`` | Reserved for Object file compatibility attributes |
+----------------------------+-----------------+----------------------------------------------------+
+----------------------------------------+-----------------+----------------------------------------------------------+
| Name | Value | Comment |
+========================================+=================+==========================================================+
| ``SHT_AARCH64_ATTRIBUTES`` | ``0x70000003`` | Object file compatibility attributes. See `BuildAttr64`_ |
+----------------------------------------+-----------------+----------------------------------------------------------+
| ``SHT_AARCH64_AUTH_RELR`` | ``0x70000004`` | Defined in ABI extension `PAuthABIELF64`_ |
+----------------------------------------+-----------------+----------------------------------------------------------+
| ``SHT_AARCH64_MEMTAG_GLOBALS_STATIC`` | ``0x70000007`` | Defined in ABI extension `MemtagABIELF64`_ |
+----------------------------------------+-----------------+----------------------------------------------------------+
| ``SHT_AARCH64_MEMTAG_GLOBALS_DYNAMIC`` | ``0x70000008`` | Defined in ABI extension `MemtagABIELF64`_ |
+----------------------------------------+-----------------+----------------------------------------------------------+


Section Attribute Flags
Expand Down
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