dyncall: doc/manual/callconvs/callconv

annotate doc/manual/callconvs/callconv_ppc32.tex @ 328:276eb8c87aa0

- review and fixes, cleanup, amendments to calling convention appendix of manual

author	Tassilo Philipp
date	Fri, 22 Nov 2019 23:11:56 +0100
parents	cde7b1f3b8f2
children	74c056b597b7

rev	line source
0 3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	1 %//////////////////////////////////////////////////////////////////////////////
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	2 %
328 276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	3 % Copyright (c) 2007-2019 Daniel Adler <dadler@uni-goettingen.de>,
0 3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	4 % Tassilo Philipp <tphilipp@potion-studios.com>
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	5 %
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	6 % Permission to use, copy, modify, and distribute this software for any
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	7 % purpose with or without fee is hereby granted, provided that the above
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	8 % copyright notice and this permission notice appear in all copies.
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	9 %
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	10 % THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	11 % WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	12 % MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	13 % ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	14 % WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	15 % ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	16 % OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	17 %
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	18 %//////////////////////////////////////////////////////////////////////////////
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	19
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	20 % ==================================================
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	21 % PowerPC 32
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	22 % ==================================================
328 276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	23 \subsection{PowerPC (32bit) Calling Conventions}
0 3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	24
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	25 \paragraph{Overview}
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	26
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	27 \begin{itemize}
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	28 \item Word size is 32 bits
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	29 \item Big endian (MSB) and litte endian (LSB) operating modes.
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	30 \item Processor operates on floats in double precision floating point arithmetc (IEEE-754) values directly (single precision is converted on the fly)
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	31 \item Apple Mac OS X/Darwin PPC is specified in "Mac OS X ABI Function Call Guide"\cite{ppcMacOSX}. It uses Big Endian (MSB).
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	32 \item Linux PPC 32-bit ABI is specified in "LSB for PPC"\cite{ppc32LSB} which is based on "System V ABI". It uses Big Endian (MSB).
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	33 \item PowerPC EABI is defined in the "PowerPC Embedded Application Binary Interface 32-Bit Implementation".
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	34 \end{itemize}
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	35
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	36 \paragraph{\product{dyncall} support}
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	37
328 276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	38 \product{Dyncall} and \product{dyncallback} are supported for PowerPC (32bit) Big Endian (MSB), for Darwin's and System V's calling convention.
0 3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	39
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	40
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	41 \subsubsection{Mac OS X/Darwin}
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	42
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	43 \paragraph{Registers and register usage}
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	44
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	45 \begin{table}[h]
77 e441ef3ec782 - manual layout tweaks cslag parents: 76 diff changeset	46 \begin{tabular*}{0.95\textwidth}{3 B}
0 3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	47 Name & Brief description\\
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	48 \hline
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	49 {\bf gpr0} & scratch\\
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	50 {\bf gpr1} & stack pointer\\
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	51 {\bf gpr2} & scratch\\
328 276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	52 {\bf gpr3,gpr4} & return value, parameter 0 and 1 for integer or pointer, scratch\\
276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	53 {\bf gpr5-gpr10} & parameter 2-7 for integer or pointer parameters, scratch\\
276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	54 {\bf gpr11} & preserve\\
0 3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	55 {\bf gpr12} & branch target for dynamic code generation\\
328 276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	56 {\bf gpr13-31} & preserve\\
0 3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	57 {\bf fpr0} & scratch\\
238 05181c5a6edd - ppc32 doc tweak Tassilo Philipp parents: 125 diff changeset	58 {\bf fpr1} & floating point return value, floating point parameter 0 (always double precision)\\
05181c5a6edd - ppc32 doc tweak Tassilo Philipp parents: 125 diff changeset	59 {\bf fpr2-fpr13} & floating point parameters 1-12 (always double precision)\\
328 276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	60 {\bf fpr14-fpr31} & preserve\\
0 3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	61 {\bf v0-v1} & scratch\\
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	62 {\bf v2-v13} & vector parameters\\
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	63 {\bf v14-v19} & scratch\\
328 276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	64 {\bf v20-v31} & preserve\\
276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	65 {\bf lr} & link-register, scratch\\
276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	66 {\bf ctr} & count-register, scratch\\
276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	67 {\bf cr0-cr7} & conditional register fields, each 4-bit wide (cr0-cr1 and cr5-cr7 are scratch)\\
76 7ca46969e0ad - tweaks in manual, mainly for html generation cslag parents: 0 diff changeset	68 \end{tabular*}
0 3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	69 \caption{Register usage on Darwin PowerPC 32-Bit}
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	70 \end{table}
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	71
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	72 \paragraph{Parameter passing}
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	73
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	74 \begin{itemize}
328 276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	75 \item stack grows down
238 05181c5a6edd - ppc32 doc tweak Tassilo Philipp parents: 125 diff changeset	76 \item stack parameter order: right-to-left
05181c5a6edd - ppc32 doc tweak Tassilo Philipp parents: 125 diff changeset	77 \item caller cleans up the stack
0 3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	78 \item the first 8 integer parameters are passed in registers gpr3-gpr10
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	79 \item the first 12 floating point parameters are passed in registers fpr1-fpr13
328 276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	80 \item 64 bit arguments are passed as if they were two 32 bit arguments, without skipping registers for alignment (this means passing half via a register and half via the stack is allowed)
0 3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	81 \item if a float parameter is passed via a register, gpr registers are skipped for subsequent integer parameters (based on the size of
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	82 the float - 1 register for single precision and 2 for double precision floating point values)
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	83 \item the caller pushes subsequent parameters onto the stack
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	84 \item for every parameter passed via a register, space is reserved in the stack parameter area (in order to spill the parameters if
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	85 needed - e.g. varargs)
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	86 \item ellipsis calls take floating point values in int and float registers (single precision floats are promoted to double precision
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	87 as defined for ellipsis calls)
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	88 \item all nonvector parameters are aligned on 4-byte boundaries
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	89 \item vector parameters are aligned on 16-byte boundaries
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	90 \item composite parameters with size of 1 or 2 bytes occupy low-order bytes of their 4-byte area. INCONSISTENT with other 32-bit PPC
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	91 binary interfaces. In AIX and OS 9, padding bytes always follow the data structure
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	92 \item composite parameters 3 bytes or larger in size occupy high-order bytes
125 f1fc1c836baf - mips doc stuff cslag parents: 123 diff changeset	93 \item integer parameters \textless\ 32 bit are right-justified (meaning occupy higher-address bytes) in their 4-byte slot on the stack, requiring extra-care for big-endian targets
0 3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	94 \end{itemize}
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	95
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	96
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	97 \paragraph{Return values}
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	98
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	99 \begin{itemize}
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	100 \item return values of integer \textless=\ 32bit or pointer type use gpr3
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	101 \item 64 bit integers use gpr3 and gpr4 (hiword in gpr3, loword in gpr4)
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	102 \item floating point values are returned via fpr1
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	103 \item structures \textless=\ 64 bits use gpr3 and gpr4
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	104 \item for types \textgreater\ 64 bits, a secret first parameter with an address to the return value is passed
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	105 \end{itemize}
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	106
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	107
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	108 \paragraph{Stack layout}
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	109
328 276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	110 % verified/amended: TP nov 2019 (see also doc/disas_examples/ppc.darwin.disas)
276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	111 Stack frame is always 16-byte aligned. Prolog opens frame with additional, fixed space for a linkage area, to hold a number of values (not all of them are required to be saved, though). Stack directly after function prolog:\\
0 3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	112
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	113 \begin{figure}[h]
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	114 \begin{tabular}{5\|3\|1 1}
328 276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	115 & \vdots & & \\
276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	116 \hhline{~=~~}
276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	117 register save area & \hspace{4cm} & & \mrrbrace{14}{caller's frame} \\
0 3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	118 \hhline{~-~~}
328 276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	119 local data & & & \\
0 3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	120 \hhline{~-~~}
328 276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	121 \mrlbrace{6}{parameter area} & last arg & \mrrbrace{3}{stack parameters} & \\
276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	122 & \ldots & & \\
276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	123 & 9th word of arg data & & \\
276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	124 & gpr10 & \mrrbrace{3}{spill area (as needed)} & \\
276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	125 & \ldots & & \\
276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	126 & gpr3 & & \\
0 3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	127 \hhline{~-~~}
328 276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	128 \mrlbrace{6}{linkage area} & reserved & & \\
276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	129 & reserved & & \\
276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	130 & reserved & & \\
276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	131 & return address (callee saved) & & \\
276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	132 & condition reg (callee saved) & & \\
276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	133 & parent stack frame pointer & & \\
0 3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	134 \hhline{~=~~}
328 276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	135 register save area & & & \mrrbrace{4}{current frame} \\
276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	136 \hhline{~-~~}
276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	137 local data & & & \\
0 3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	138 \hhline{~-~~}
328 276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	139 parameter area & & & \\
0 3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	140 \hhline{~-~~}
328 276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	141 linkage area & \vdots & & \\
0 3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	142 \end{tabular}
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	143 \caption{Stack layout on ppc32 Darwin}
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	144 \end{figure}
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	145
328 276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	146
276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	147 \newpage
276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	148
276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	149
0 3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	150 \subsubsection{System V PPC 32-bit}
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	151
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	152 \paragraph{Status}
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	153
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	154 \paragraph{Registers and register usage}
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	155
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	156 \begin{table}[h]
77 e441ef3ec782 - manual layout tweaks cslag parents: 76 diff changeset	157 \begin{tabular*}{0.95\textwidth}{3 B}
76 7ca46969e0ad - tweaks in manual, mainly for html generation cslag parents: 0 diff changeset	158 Name & Brief description\\
0 3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	159 \hline
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	160 {\bf r0} & scratch\\
328 276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	161 {\bf r1} & stack pointer, preserve\\
0 3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	162 {\bf r2} & system-reserved\\
328 276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	163 {\bf r3-r4} & parameter passing and return value, scratch\\
276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	164 {\bf r5-r10} & parameter passing, scratch\\
0 3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	165 {\bf r11-r12} & scratch\\
328 276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	166 {\bf r13} & small data area pointer register\\
276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	167 {\bf r14-r30} & local variables, preserve\\
276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	168 {\bf r31} & used for local variables or \emph{environment pointer}, preserve\\
0 3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	169 {\bf f0} & scratch\\
328 276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	170 {\bf f1} & parameter passing and return value, scratch\\
276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	171 {\bf f2-f8} & parameter passing, scratch\\
0 3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	172 {\bf f9-13} & scratch\\
328 276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	173 {\bf f14-f31} & local variables, preserve\\
276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	174 {\bf cr0-cr7} & conditional register fields, each 4-bit wide (cr0-cr1 and cr5-cr7 are scratch)\\
276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	175 {\bf lr} & link register, scratch\\
276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	176 {\bf ctr} & count register, scratch \\
276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	177 {\bf xer} & fixed-point exception register, scratch\\
276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	178 {\bf fpscr} & floating-point Status and Control Register\\
0 3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	179 % {\bf v0-v1} & scratch\\
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	180 % {\bf v2-v13} & vector parameters\\
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	181 % {\bf v14-v19} & scratch\\
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	182 % {\bf v20-v31} & permanent\\
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	183 % {\bf lr} & scratch, link-register\\
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	184 % {\bf ctr} & scratch, count-register\\
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	185 % {\bf cr0-cr1} & scratch\\
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	186 % {\bf cr2-cr4} & permanent\\
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	187 % {\bf cr5-cr7} & scratch\\
76 7ca46969e0ad - tweaks in manual, mainly for html generation cslag parents: 0 diff changeset	188 \end{tabular*}
0 3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	189 \caption{Register usage on System V ABI PowerPC Processor}
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	190 \end{table}
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	191
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	192 \paragraph{Parameter passing}
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	193
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	194 \begin{itemize}
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	195 \item Stack pointer (r1) is always 16-byte aligned. The EABI differs here - it is 8-byte alignment.
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	196 \item 8 general-purpose registers (r3-r10) for integer and pointer types.
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	197 \item 8 floating-pointer registers (f1-f8) for float (promoted to double) and double types.
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	198 \item Additional arguments are passed on the stack directly after the back-chain and saved return address (8 bytes structure) on the callers stack frame.
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	199 \item 64-bit integer data types are passed in general-purpose registers as a whole in two
328 276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	200 32-bit general purpose registers (an odd and an even e.g. r3 and r4), skipping an even integer register
276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	201 or passed on the stack; they are never splitted into a register and stack part
0 3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	202 \item Ellipse calls set CR bit 6
123 d203ba52c246 - manual callconv clarifications cslag parents: 95 diff changeset	203 \item integer parameters \textless\ 32 bit are right-justified (meaning occupy high-order bytes) in their 4-byte area, requiring extra-care for big-endian targets
328 276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	204 \item no spill area is used on stack, iterating over varargs requires a specific va\_list implementation
0 3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	205 \end{itemize}
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	206
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	207 \paragraph{Return values}
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	208
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	209 \begin{itemize}
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	210 \item 32-bit integers use register r3, 64-bit use registers r3 and r4 (hiword in r3, loword in r4).
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	211 \item floating-point values are returned using register f1.
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	212 \end{itemize}
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	213
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	214
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	215 \paragraph{Stack layout}
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	216
328 276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	217 % verified/amended: TP nov 2019 (see also doc/disas_examples/ppc.sysv.disas)
0 3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	218 Stack frame is always 16-byte aligned. Stack directly after function prolog:\\
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	219
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	220 \begin{figure}[h]
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	221 \begin{tabular}{5\|3\|1 1}
328 276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	222 & \vdots & & \\
0 3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	223 \hhline{~=~~}
328 276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	224 register save area & \hspace{4cm} & & \mrrbrace{7}{caller's frame} \\
0 3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	225 \hhline{~-~~}
328 276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	226 local data & & & \\
0 3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	227 \hhline{~-~~}
328 276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	228 \mrlbrace{3}{parameter area} & last arg & \mrrbrace{3}{stack parameters} & \\
276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	229 & \ldots & & \\
276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	230 & first arg passed via stack & & \\
0 3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	231 \hhline{~-~~}
328 276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	232 & return address (callee saved) & & \\
276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	233 \hhline{~-~~}
276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	234 & parent stack frame pointer & & \\
0 3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	235 \hhline{~=~~}
328 276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	236 register save area & & & \mrrbrace{4}{current frame} \\
0 3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	237 \hhline{~-~~}
328 276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	238 local data & & & \\
0 3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	239 \hhline{~-~~}
328 276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	240 parameter area & & & \\
276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	241 \hhline{~-~~}
276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	242 & \vdots & & \\
0 3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	243 \end{tabular}
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	244 \caption{Stack layout on System V ABI for PowerPC 32-bit calling convention}
3e629dc19168 initial from svn dyncall-1745 Daniel Adler parents: diff changeset	245 \end{figure}
328 276eb8c87aa0 - review and fixes, cleanup, amendments to calling convention appendix of manual Tassilo Philipp parents: 241 diff changeset	246

Mercurial > pub > dyncall > dyncall

annotate doc/manual/callconvs/callconv_ppc32.tex @ 328:276eb8c87aa0