1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
|
{
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)
protected
procedure gen_syscall_para(para: tcallparanode); override;
public
procedure do_syscall;override;
procedure pop_parasize(pop_size: longint);override;
end;
implementation
uses
globtype,systems,
cutils,verbose,globals,
symconst,symbase,symsym,symcpu,symtable,defutil,paramgr,parabase,
cgbase,pass_2,
cpuinfo,cpubase,aasmbase,aasmtai,aasmdata,aasmcpu,
nmem,nld,ncnv,
ncgutil,cgutils,cgobj,tgobj,rgobj,rgcpu,
cg64f32,cgcpu,cpupi,procinfo;
procedure tm68kcallnode.pop_parasize(pop_size: longint);
begin
if pop_size<>0 then
current_asmdata.CurrAsmList.concat(taicpu.op_const_reg(A_ADD,S_L,pop_size,NR_SP));
end;
procedure tm68kcallnode.gen_syscall_para(para: tcallparanode);
begin
{ lib parameter has no special type but proccalloptions must be a syscall }
para.left:=cloadnode.create(tcpuprocdef(procdefinition).libsym,tcpuprocdef(procdefinition).libsym.owner);
end;
procedure tm68kcallnode.do_syscall;
var
tmpref: treference;
begin
case target_info.system of
system_m68k_atari:
begin
if po_syscall in tprocdef(procdefinition).procoptions then
begin
reference_reset_base(tmpref,NR_SP,0,ctempposinvalid,2,[]);
tmpref.direction:=dir_dec;
current_asmdata.CurrAsmList.concat(taicpu.op_const_ref(A_MOVE,S_W,tprocdef(procdefinition).import_nr,tmpref));
current_asmdata.CurrAsmList.concat(taicpu.op_const(A_TRAP,S_NO,tprocdef(procdefinition).extnumber));
inc(pushedparasize,2); { kludge, trap code should be a hidden para instead... }
end
else
internalerror(2016100302);
end;
system_m68k_amiga:
begin
if po_syscall_legacy in tprocdef(procdefinition).procoptions then
begin
{ according to Amiga Developer CD 2.1, system functions destroy the
scratch regs D0-D1 and A0-A1, but preserve all other regs. A6 is
not used as FP on Amiga any more (we use A5), so we don't need to
save it. (KB)
http://amigadev.elowar.com/read/ADCD_2.1/Libraries_Manual_guide/node0290.html }
reference_reset_base(tmpref,NR_A6,-tprocdef(procdefinition).extnumber,ctempposinvalid,4,[]);
current_asmdata.CurrAsmList.concat(taicpu.op_ref(A_JSR,S_NO,tmpref));
end
else
internalerror(2005010403);
end;
system_m68k_palmos:
begin
if po_syscall in tprocdef(procdefinition).procoptions then
begin
if po_syscall_has_importnr in tprocdef(procdefinition).procoptions then
begin
cg.getcpuregister(current_asmdata.CurrAsmList,NR_D2);
current_asmdata.CurrAsmList.concat(taicpu.op_const_reg(A_MOVE,S_L,tprocdef(procdefinition).import_nr,NR_D2));
end;
current_asmdata.CurrAsmList.concat(taicpu.op_const(A_TRAP,S_NO,15));
current_asmdata.CurrAsmList.concat(tai_const.create_16bit(tprocdef(procdefinition).extnumber));
if po_syscall_has_importnr in tprocdef(procdefinition).procoptions then
cg.ungetcpuregister(current_asmdata.CurrAsmList,NR_D2);
end
else
internalerror(2017081201);
end;
else
internalerror(2004042901);
end;
end;
begin
ccallnode:=tm68kcallnode;
end.
|
