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{
Copyright (c) 2002 by Florian Klaempfl
Implements the M68K specific part of call nodes
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
****************************************************************************
}
unit n68kcal;
{$i fpcdefs.inc}
interface
uses
symdef,node,ncal,ncgcal;
type
tm68kcallnode = class(tcgcallnode)
procedure do_syscall;override;
end;
implementation
uses
globtype,systems,
cutils,verbose,globals,
symconst,symbase,symsym,symtable,defutil,paramgr,parabase,
cgbase,pass_2,
cpuinfo,cpubase,aasmbase,aasmtai,aasmdata,aasmcpu,
nmem,nld,ncnv,
ncgutil,cgutils,cgobj,tgobj,regvars,rgobj,rgcpu,
cg64f32,cgcpu,cpupi,procinfo;
procedure tm68kcallnode.do_syscall;
var
tmpref: treference;
tmpref2: treference;
begin
case target_info.system of
system_m68k_amiga:
begin
if po_syscall_legacy in tprocdef(procdefinition).procoptions then
begin
{ save base pointer on syscalls }
{ FIXME: probably this will need to be extended to save all regs (KB) }
reference_reset_base(tmpref2, NR_STACK_POINTER_REG, 0, 4);
tmpref2.direction := dir_dec;
current_asmdata.CurrAsmList.concat(taicpu.op_reg_ref(A_MOVE,S_L,NR_FRAME_POINTER_REG,tmpref2));
{ the actuall call }
reference_reset_base(tmpref,NR_A6,-tprocdef(procdefinition).extnumber,4);
current_asmdata.CurrAsmList.concat(taicpu.op_ref(A_JSR,S_NO,tmpref));
{ restore frame pointer }
reference_reset_base(tmpref2, NR_STACK_POINTER_REG, 0, 4);
tmpref2.direction := dir_inc;
current_asmdata.CurrAsmList.concat(taicpu.op_ref_reg(A_MOVE,S_L,tmpref2,NR_FRAME_POINTER_REG));
end
else
internalerror(2005010403);
end;
else
internalerror(2004042901);
end;
end;
begin
ccallnode:=tm68kcallnode;
end.
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