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38 lines
2.0 KiB
Markdown
38 lines
2.0 KiB
Markdown
---
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title: 64-bit ELF ABI Specification for OpenPOWER Architecture
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group: systemsoftware
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publicreview: false
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aliases:
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- "64bitelfv2abi/"
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- "64bitelfv2/"
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tags:
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- specifications
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- systemsoftware
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- abi
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- toolchain
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- compiler
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date: 2021-03-15
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draft: false
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---
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The ABI (application binary interface) specification provides the definitions for the machine interface and
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inter-object interfaces for the little-endian POWER architecture.
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This specification defines the OpenPOWER ELF ABI which is derived from and represents the first major update to the Power ABI
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since the original release of the IBM® RS/6000® ABI.
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It was developed to make extensive use of new functions available in OpenPOWER-compliant processors.
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It expects an OpenPOWER-compliant processor to implement at least Power ISA v2.07B with all OpenPOWER Architecture instruction categories
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as well as OpenPOWER-defined implementation characteristics for some implementation-specific features.
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The Executable and Linking Format (ELF) defines a linking interface for executables and shared objects in two parts :
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the first part is the generic System V ABI, the second part is a processor-specific supplement.
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This document, the OpenPOWER ABI for Linux Supplement for the Power Architecture 64-bit ELF V2 ABI,
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is the OpenPOWER-compliant processor-specific supplement for use with ELF on 64-bit IBM Power Architecture® systems.
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This is not a complete System V ABI supplement because it does not define any library interfaces.
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This document establishes both big-endian and little-endian application binary interfaces.
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OpenPOWER-compliant processors in the 64-bit Power Architecture can execute in either big-endian or little-endian mode.
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Executables and executable-generated data (in general) that subscribes to either byte ordering is not portable to a system running in the other mode.
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Comments, questions, etc. can be submitted to the public mailing list for this document at
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<syssw-elfv2abi@mailinglist.openpowerfoundation.org>.
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