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fpc/compiler/systems/t_sinclairql.pas

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{
Copyright (c) 2020 by Free Pascal Development Team
This unit implements support import, export, link routines
for the m68k Sinclair QL target
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 t_sinclairql;
{$i fpcdefs.inc}
interface
uses
rescmn, comprsrc, link;
type
PLinkerSinclairQL = ^TLinkerSinclairQL;
TLinkerSinclairQL = class(texternallinker)
private
Origin: DWord;
UseVLink: boolean;
function WriteResponseFile(isdll: boolean): boolean;
procedure SetSinclairQLInfo;
function MakeSinclairQLExe: boolean;
public
constructor Create; override;
procedure SetDefaultInfo; override;
procedure InitSysInitUnitName; override;
function MakeExecutable: boolean; override;
end;
implementation
uses
sysutils,cutils,cfileutl,cclasses,aasmbase,
globtype,globals,systems,verbose,cscript,fmodule,i_sinclairql;
type
TQLHeader = packed record
hdr_id: array[0..17] of char;
hdr_reserved: byte;
hdr_length: byte;
hdr_access: byte;
hdr_type: byte;
hdr_data: dword;
hdr_extra: dword;
end;
TXTccData = packed record
xtcc_id: array[0..3] of char;
xtcc_data: dword;
end;
const
DefaultQLHeader: TQLHeader = (
hdr_id: ']!QDOS File Header';
hdr_reserved: 0;
hdr_length: $f;
hdr_access: 0;
hdr_type: 1;
hdr_data: 0;
hdr_extra: 0;
);
DefaultXTccData: TXTCCData = (
xtcc_id: 'XTcc';
xtcc_data: 0;
);
const
DefaultOrigin = $0;
ProgramHeaderName = 'main';
constructor TLinkerSinclairQL.Create;
begin
UseVLink:=(cs_link_vlink in current_settings.globalswitches);
Inherited Create;
{ allow duplicated libs (PM) }
SharedLibFiles.doubles:=true;
StaticLibFiles.doubles:=true;
end;
procedure TLinkerSinclairQL.SetSinclairQLInfo;
begin
if ImageBaseSetExplicity then
Origin:=ImageBase
else
Origin:=DefaultOrigin;
with Info do
begin
if not UseVLink then
begin
ExeCmd[1]:='ld $DYNLINK $OPT -d -n -o $EXE $RES';
end
else
begin
ExeCmd[1]:='vlink $QLFLAGS $FLAGS $GCSECTIONS $OPT $STRIP $MAP -o $EXE -T $RES';
end;
end;
end;
procedure TLinkerSinclairQL.SetDefaultInfo;
begin
if target_info.system = system_m68k_sinclairql then
SetSinclairQLInfo;
end;
procedure TLinkerSinclairQL.InitSysInitUnitName;
begin
sysinitunit:='si_prc';
end;
function TLinkerSinclairQL.WriteResponseFile(isdll: boolean): boolean;
var
linkres : TLinkRes;
HPath : TCmdStrListItem;
s : string;
begin
WriteResponseFile:=False;
{ Open link.res file }
LinkRes:=TLinkRes.Create(outputexedir+Info.ResName,true);
if UseVLink and (source_info.dirsep <> '/') then
LinkRes.fForceUseForwardSlash:=true;
{ Write path to search libraries }
HPath:=TCmdStrListItem(current_module.locallibrarysearchpath.First);
while assigned(HPath) do
begin
s:=HPath.Str;
if (cs_link_on_target in current_settings.globalswitches) then
s:=ScriptFixFileName(s);
LinkRes.Add('-L'+s);
HPath:=TCmdStrListItem(HPath.Next);
end;
HPath:=TCmdStrListItem(LibrarySearchPath.First);
while assigned(HPath) do
begin
s:=HPath.Str;
if s<>'' then
LinkRes.Add('SEARCH_DIR("'+s+'")');
HPath:=TCmdStrListItem(HPath.Next);
end;
LinkRes.Add('INPUT (');
{ add objectfiles, start with prt0 always }
if not (target_info.system in systems_internal_sysinit) then
begin
s:=FindObjectFile('prt0','',false);
LinkRes.AddFileName(maybequoted(s));
end;
while not ObjectFiles.Empty do
begin
s:=ObjectFiles.GetFirst;
if s<>'' then
begin
{ vlink doesn't use SEARCH_DIR for object files }
if UseVLink then
s:=FindObjectFile(s,'',false);
LinkRes.AddFileName(maybequoted(s));
end;
end;
{ Write staticlibraries }
if not StaticLibFiles.Empty then
begin
{ vlink doesn't need, and doesn't support GROUP }
if not UseVLink then
begin
LinkRes.Add(')');
LinkRes.Add('GROUP(');
end;
while not StaticLibFiles.Empty do
begin
S:=StaticLibFiles.GetFirst;
LinkRes.AddFileName(maybequoted(s));
end;
end;
LinkRes.Add(')');
with LinkRes do
begin
Add('');
Add('PHDRS {');
Add(' '+ProgramHeaderName+' PT_LOAD;');
Add('}');
Add('SECTIONS');
Add('{');
Add(' . = 0x'+hexstr(Origin,8)+';');
Add(' .text : {');
Add(' _stext = .;');
Add(' *(.text .text.* )');
Add(' *(.data .data.* .rodata .rodata.* .fpc.* )');
Add(' *(.stack .stack.*)');
{ force the end of section to be word aligned }
Add(' . = ALIGN(2); SHORT(0x514C);');
Add(' _etext = .;');
Add(' } :'+ProgramHeaderName);
Add(' .bss (NOLOAD): {');
Add(' _sbss = .;');
Add(' *(.bss .bss.*)');
Add(' . = ALIGN(2); SHORT(0x0000);');
Add(' _ebss = .;');
Add(' } :'+ProgramHeaderName);
Add('}');
end;
{ Write and Close response }
linkres.writetodisk;
linkres.free;
WriteResponseFile:=True;
end;
function TLinkerSinclairQL.MakeSinclairQLExe: boolean;
var
BinStr,
CmdStr : TCmdStr;
StripStr: string[40];
DynLinkStr : ansistring;
GCSectionsStr : string;
FlagsStr : string;
QLFlagsStr: string;
MapStr : string;
ExeName: string;
fd,fs: file;
fhdr: text;
buf: pointer;
bufread,bufsize: longint;
HdrName: string;
HeaderLine: string;
HeaderSize: longint;
code: word;
QLHeader: TQLHeader;
XTccData: TXTccData;
BinSize: longint;
RelocSize: longint;
DataSpace: DWord;
begin
StripStr:='';
GCSectionsStr:='';
DynLinkStr:='';
FlagsStr:='';
QLFlagsStr:='';
MapStr:='';
if (cs_link_map in current_settings.globalswitches) then
MapStr:='-M'+maybequoted(ScriptFixFilename(current_module.mapfilename));
if (cs_link_strip in current_settings.globalswitches) then
StripStr:='-s';
if rlinkpath<>'' then
DynLinkStr:='--rpath-link '+rlinkpath;
if UseVLink then
begin
if create_smartlink_sections then
GCSectionsStr:='-gc-all';
if sinclairql_vlink_experimental then
QLFlagsStr:='-b sinclairql -q -'+lower(sinclairql_metadata_format)+' -stack='+tostr(StackSize)
else
QLFlagsStr:='-b rawseg -q';
end;
ExeName:=current_module.exefilename;
HdrName:=ExeName+'.hdr';
{ Call linker }
SplitBinCmd(Info.ExeCmd[1],BinStr,CmdStr);
binstr:=FindUtil(utilsprefix+BinStr);
Replace(cmdstr,'$OPT',Info.ExtraOptions);
Replace(cmdstr,'$EXE',maybequoted(ScriptFixFileName(ExeName)));
Replace(cmdstr,'$RES',maybequoted(ScriptFixFileName(outputexedir+Info.ResName)));
Replace(cmdstr,'$MAP',MapStr);
Replace(cmdstr,'$FLAGS',FlagsStr);
Replace(cmdstr,'$STRIP',StripStr);
Replace(cmdstr,'$GCSECTIONS',GCSectionsStr);
Replace(cmdstr,'$DYNLINK',DynLinkStr);
Replace(cmdstr,'$QLFLAGS',QLFlagsStr);
MakeSinclairQLExe:=DoExec(BinStr,CmdStr,true,false);
{ Kludge:
With the above linker script, vlink will produce two files. The main binary
and the relocation info. Here we copy the two together. (KB) }
if MakeSinclairQLExe and not sinclairql_vlink_experimental then
begin
QLHeader:=DefaultQLHeader;
XTccData:=DefaultXTccData;
BinSize:=0;
RelocSize:=0;
bufsize:=16384;
{$push}
{$i-}
{ Rename vlink's output file into the header file it is, then parse the
expected length from it. Later we use either this size or the final binary
size in the BASIC loader, depending on which one is bigger. (KB) }
RenameFile(ExeName,HdrName);
assign(fhdr,HdrName);
reset(fhdr);
readln(fhdr,HeaderLine);
Val(Copy(HeaderLine,RPos('0x',HeaderLine),Length(HeaderLine)),HeaderSize,code);
close(fhdr);
buf:=GetMem(bufsize);
assign(fd,ExeName);
rewrite(fd,1);
assign(fs,ExeName+'.'+ProgramHeaderName+'.rel'+ProgramHeaderName);
reset(fs,1);
RelocSize := FileSize(fs);
close(fs);
assign(fs,ExeName+'.'+ProgramHeaderName);
reset(fs,1);
BinSize := FileSize(fs);
{ We assume .bss size is total size indicated by linker minus emmited binary.
DataSpace size is .bss + stack space }
DataSpace := NToBE(DWord(max((HeaderSize - BinSize) - RelocSize + StackSize,0)));
{ Option: prepend QEmuLator and QPC2 v5 compatible header to EXE }
if sinclairql_metadata_format='QHDR' then
begin
QLHeader.hdr_data:=DataSpace;
blockwrite(fd, QLHeader, sizeof(QLHeader));
end;
repeat
blockread(fs,buf^,bufsize,bufread);
blockwrite(fd,buf^,bufread);
until eof(fs);
close(fs);
// erase(fs);
assign(fs,ExeName+'.'+ProgramHeaderName+'.rel'+ProgramHeaderName);
reset(fs,1);
repeat
blockread(fs,buf^,bufsize,bufread);
blockwrite(fd,buf^,bufread);
until eof(fs);
close(fs);
// erase(fs);
{ Option: append cross compilation data space marker, this can be picked up by
a special version of InfoZIP (compiled with -DQLZIP and option -Q) or by any
of the XTcc unpack utilities }
if sinclairql_metadata_format='XTCC' then
begin
XTccData.xtcc_data:=DataSpace;
blockwrite(fd, XTccData, sizeof(XTccData));
end;
close(fd);
{$pop}
FreeMem(buf);
MakeSinclairQLExe:=(code = 0) and not (BinSize = 0) and (IOResult = 0);
end;
end;
function TLinkerSinclairQL.MakeExecutable:boolean;
var
success : boolean;
bootfile : TScript;
ExeName: String;
begin
if not(cs_link_nolink in current_settings.globalswitches) then
Message1(exec_i_linking,current_module.exefilename);
{ Write used files and libraries }
WriteResponseFile(false);
success:=MakeSinclairQLExe;
{ Remove ReponseFile }
if (success) and not(cs_link_nolink in current_settings.globalswitches) then
DeleteFile(outputexedir+Info.ResName);
MakeExecutable:=success; { otherwise a recursive call to link method }
end;
{*****************************************************************************
Initialize
*****************************************************************************}
initialization
RegisterLinker(ld_sinclairql,TLinkerSinclairQL);
RegisterTarget(system_m68k_sinclairql_info);
end.
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