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89c1b68b14
This unit was empty unless OLDREGVARS macro was set,
but this does not compile and no change has been made since 2011.
* Remove regvars from all _USES clauses.
git-svn-id: trunk@34808 -
98 lines
2.7 KiB
ObjectPascal
98 lines
2.7 KiB
ObjectPascal
{
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Copyright (c) 2002 by Florian Klaempfl
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Implements the PowerPC specific part of call nodes
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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****************************************************************************
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}
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unit nppccal;
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{$I fpcdefs.inc}
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interface
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uses
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aasmdata, cgbase,
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symdef, node, ncal, ncgcal;
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type
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tppccallparanode = class(tcgcallparanode)
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end;
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tppccallnode = class(tcgcallnode)
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protected
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function get_call_reg(list: TAsmList): tregister; override;
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procedure unget_call_reg(list: TAsmList; reg: tregister); override;
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public
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function pass_1: tnode; override;
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procedure do_syscall; override;
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end;
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implementation
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uses
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globtype, systems,
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cutils, verbose, globals,
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symconst, symbase, symsym, symtable, defutil, paramgr, parabase,
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pass_2,
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cpuinfo, cpubase, aasmbase, aasmtai, aasmcpu,
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nmem, nld, ncnv,
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ncgutil, cgutils, cgobj, tgobj, rgobj, rgcpu,
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cgcpu, cpupi, procinfo;
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function tppccallnode.get_call_reg(list: TAsmList): tregister;
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begin
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{ on the ppc64/ELFv2 abi, all indirect calls must go via R12, so that the
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called function can use R12 as PIC base register }
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cg.getcpuregister(list,NR_R12);
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result:=NR_R12;
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end;
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procedure tppccallnode.unget_call_reg(list: TAsmList; reg: tregister);
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begin
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cg.ungetcpuregister(list,NR_R12);
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end;
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function tppccallnode.pass_1: tnode;
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begin
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result:=inherited;
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if assigned(result) then
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exit;
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{ for ELFv2, we must load the TOC/GOT register in case this routine may
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call an external routine (because the lookup of the target address is
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TOC-based). Maybe needs to be extended to non-ELFv2 too }
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if target_info.abi=abi_powerpc_elfv2 then
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include(current_procinfo.flags,pi_needs_got);
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end;
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procedure tppccallnode.do_syscall;
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begin
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{ no MorphOS style syscalls supported. Only implemented to avoid abstract
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method not implemented compiler warning. }
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internalerror(2005120401);
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end;
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begin
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ccallparanode:=tppccallparanode;
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ccallnode := tppccallnode;
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end.
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