2022Q1

[stuij]

changes

All the changes in this release are captured by the 2022Q1 milestones.
Substantive changes:

• aapcs64-morello:
  fix up rule C.8 on capabilities: aapcs64-morello: Fix up rule C.8 #120

• aaelf64:
  soft-deprecate GNU_PROPERTY_AARCH64_FEATURE_1_PAC: Soft-deprecate GNU_PROPERTY_AARCH64_FEATURE_1_PAC #121

• aadwarf64:
  move Pointer Authentication out from BETA state: [NFC] Move Pointer Authentication out from BETA state. #127
  document a limitation of the DW_CFA_AARCH64_negate_ra_state: Document a limitation of the DW_CFA_AARCH64_negate_ra_state. #129

alpha-level support for Scalable Matrix Extension (SME)

A piece of work that didn't make it into the release but should get an honorable mention is the 'alpha-level support for SME' pull request: #123. This involves big changes to the aapcs64 document, and we would appreciate any kind of feedback on it.

the specifications included in this release

ABI for the Arm 32-bit Architecture

• ABI for the Arm Architecture - Base Standard - pdf, [html](https://github.com/ARM-software/abi-aa/blob/60a8eb8c55e999d74dac5e368fc
  9d7e36e38dda4/bsabi32/bsabi32.rst)
• Procedure Call Standard for the Arm Architecture - pdf, [html](https://github.com/ARM-software/abi-aa/blob/60a8eb8c55e999d74dac5e3
  68fc9d7e36e38dda4/aapcs32/aapcs32.rst)
• ELF for the Arm Architecture - pdf, [html](https://github.com/ARM-software/abi-aa/blob/60a8eb8c55e999d74dac5e368fc9d7e36e38dda4/aa
  elf32/aaelf32.rst)
• DWARF for the Arm Architecture - pdf, [html](https://github.com/ARM-software/abi-aa/blob/60a8eb8c55e999d74dac5e368fc9d7e36e38dda
  4/aadwarf32/aadwarf32.rst)
• Base Platform ABI for the Arm Architecture - pdf, [html](https://github.com/ARM-software/abi-aa/blob/60a8eb8c55e999d74dac5e368fc9d
  7e36e38dda4/bpabi32/bpabi32.rst)
• C++ ABI for the Arm Architecture - pdf, html
• Exception Handling ABI for the Arm Architecture - pdf, html
• Run-time ABI for the Arm Architecture - pdf, html
• C Library for the Arm Architecture - pdf, html
• Support for Debugging Overlaid Programs - pdf, html
• Addenda to, and Errata in, the ABI for the ARM Architecture - pdf, html
• ABI Advisory Note - SP 8-byte alignment - pdf, html

ABI for the Arm 64-bit Architecture

• Procedure Call Standard for the Arm 64-bit Architecture - pdf, html
• ELF for the Arm 64-bit Architecture - pdf, html
• DWARF for the Arm 64-bit Architecture - pdf, html
• C++ ABI for the Arm 64-bit Architecture - pdf, html
• Vector Function ABI for the Arm 64-bit Architecture - pdf, html
• System V ABI for the Arm 64-bit Architecture - pdf, html

PAuth ABI Extension

• PAuth ABI Extension to ELF for the Arm 64-bit Architecture - pdf, html

Morello Extension

• Morello Extension to the Procedure Call Standard for the Arm 64-bit Architecture - pdf, html
• Morello Extension to ELF for the Arm 64-bit Architecture - pdf, html
• Morello Extension to DWARF for the Arm 64-bit Architecture - pdf, html

Miscellaneous material

• Semihosting for AArch32 and AArch64 - pdf, [html](https://github.com/ARM-software/abi-aa/blob/60a8eb8c55e999d74dac5e368fc9d7e3
  6e38dda4/semihosting/semihosting.rst)

download bundle

PDFs of all the above specifications have also been bundled in this zip file.

other specifications

For other ABI specifications, please go to: https://developer.arm.com/architectures/system-architectures/software-standards/abi

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This discussion was created from the release 2022Q1.