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% Copyright (c) 2007-2019 Daniel Adler <dadler@uni-goettingen.de>, 
%                         Tassilo Philipp <tphilipp@potion-studios.com>
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% ==================================================
% PowerPC 64
% ==================================================
\subsection{PowerPC (64bit) Calling Conventions}

\paragraph{Overview}

\begin{itemize}
\item Word size is 64 bits
\item Big endian (MSB) and litte endian (LSB) operating modes.
\item Apple Mac OS X/Darwin PPC is specified in "Mac OS X ABI Function Call Guide"\cite{ppcMacOSX}. It uses Big Endian (MSB).
\item Linux PPC 64-bit ABI is specified in "64-bit PowerPC ELF Application Binary Interface Supplement"\cite{ppcelf64abi} which is based on "System V ABI".
\end{itemize}

\paragraph{\product{dyncall} support}

\product{Dyncall} supports PowerPC (64bit) Big Endian and Little Endian ELF ABIs on System V systems (Linux, etc.), including syscalls. Mac OS X is not supported.


\subsubsection{PPC64 ELF ABI}

\paragraph{Registers and register usage}

@@@


\paragraph{Parameter passing}

@@@
\begin{itemize}
\item integer parameters \textless\ 64 bit are right-justified (meaning occupy higher-address bytes) in their 8-byte slot on the stack, requiring extra-care for big-endian targets
\end{itemize}


\paragraph{Return values}

@@@


\paragraph{Stack layout}

@@@