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Specifications

Implementing a compliant C library requires knowledge across many areas. Here you can find relevant specifications that'll help you in your quest. If you know of other things that could be useful, please let us know!

These are standards to be aware of; generally uClibc aims to be compliant with the latest POSIX standard.

• POSIX 1003.1 2008 (Issue 7)
• POSIX 1003.1 2004 (Issue 6)
• SystemV ABI
• SystemV Interface (volume 1a)
• SystemV Interface (volume 1b)
• SystemV Interface (volume 2)

These are documents related to the common ELF format.

• ELF (version 1.2)
• ELF 64-bit
• ELF Generic ABI
• Thread Local Storage (TLS) (note: also contains alpha ia64 s390 s390x sh x86 x86-64)

These are architecture-specific ELF documents.

• psABI ARM
• psABI Blackfin
• psABI Intel386 (x86)
• psABI Itanium (ia64)
• psABI m68k (8bit & 16bit)
• psABI mips
• psABI PA-RISC (HP/PA)
• psABI PowerPC TLS
• psABI PowerPC64 TLS
• psABI s/390
• psABI s/390x
• psABI SuperH
• psABI SPARC
• psABI AMD64 (x86_64)

These are general architecture related reference manuals.

• Wikibooks: Assembly languages
• Alpha (General)
• ARM
• Blackfin (General)
• PA-RISC (HP/PA)
• m68k
• mips
• PowerPC (more)
• s/390
• SPARC
• x86 AMD Intel
• xtensa