qpc-database / abi-aa

Application Binary Interface for the Arm® Architecture

Application Binary Interface for the Arm® Architecture

This is the official place for the latest documents of the Application Binary Interface for the Arm® Architecture, both for source files and officially released documents.

Releases

The latest ABI releases are being made available only here on Github: https://github.com/ARM-software/abi-aa/releases

If there is no entry in the change history table for a release, there are no changes to the content of the document for that release.

For the last specifications released on developer.arm.com, see the links to the individual documents in the Document locations section below.

Defect reports

Please report defects in or enhancements to the specifications in this folder to the issue tracker page on GitHub.

For reporting defects or enhancements to documents that currenlty are not yet included in this repo and are thus only hosted on developer.arm.com, please send an email to [email protected].

Document locations

See the below tables for the status of the various ABI specifications. A dash represents that the document isn't available either on Github or on the Arm-hosted developer site.

ABI for the Arm 32-bit Architecture

specification	latest on Github	last on developer site
Application Binary Interface for the Arm architecture introduction	bsabi32	2019Q4
Procedure Call Standard for the Arm Architecture	aapcs32	2020Q2
ELF for the Arm Architecture	aaelf32	2019Q1
DWARF for the Arm Architecture	aadwarf32	2018Q4
Base Platform ABI for the Arm Architecture	bpabi32	2018Q4
C++ ABI for the Arm Architecture	cppabi32	2019Q4
Exception Handling ABI for the Arm Architecture	ehabi32	2018Q4
Run-time ABI for the Arm Architecture	rtabi32	2018Q4
C Library for the Arm Architecture	clibabi32	2018Q4
Support for Debugging Overlaid Programs	dbgovl32	2018Q4
Addenda to, and Errata in, the ABI for the ARM Architecture	addenda32	2019Q1
ABI Advisory Note - SP 8-byte alignment	advnote132	2018Q4

ABI for the Arm 64-bit Architecture

specification	latest on Github	last on developer site
Procedure Call Standard for the Arm 64-bit Architecture	aapcs64	2018Q4
ELF for the Arm 64-bit Architecture	aaelf64	2020Q2
DWARF for the Arm 64-bit Architecture	aadwarf64	2020Q2
C++ ABI for the Arm 64-bit Architecture	cppabi64	2020Q2
Vector Function ABI for the Arm 64-bit Architecture	vfabia64	2019Q2

ABI for the Arm 64-bit Architecture with SVE support

specification	latest on Github	last on developer site
Procedure Call Standard for the Arm 64-bit Architecture with SVE support	content merged with aapcs64	2019Q2
DWARF for the Arm 64-bit Architecture with SVE support	content merged with aadwarf64	SVEdwf 00bet1
Vector Function ABI for the Arm 64-bit Architecture (identical to document in ABI for the Arm 64-bit Architecture section)	vfabia64	2019Q2

PAuth ABI Extension

specification	latest on Github	last on developer site
PAuth ABI Extension to ELF for the Arm 64-bit Architecture	pauthabielf64	-

Morello Extension

specification	latest on Github	last on developer site
Morello Extension to the Procedure Call Standard for the Arm 64-bit Architecture	aapcs64-morello	2020Q3
Morello Extension to ELF for the Arm 64-bit Architecture	aaelf64-morello	2020Q3
Morello Extension to DWARF for the Arm 64-bit Architecture	aadwarf64-morello	2020Q3

Miscellaneous material

specification	latest on Github	last on developer site
Semihosting for AArch32 and AArch64	semihosting	2019Q4

License

All the ABI documents themselves are not dependent on any assets outside of their own directory and all have their own license file included in the directory. Currently all the ABI documents are licenced under the Creative Commons Attribution-ShareAlike 4.0 International License + grant of Patent License. Contributions to these files are accepted under the same license.

The files in the sub-directories of the tools directory are provided under the Apache 2.0 license. Contributions to these files are accepted under the same license.