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fpc/compiler/systems/t_gba.pas
peter 9f5d69ce31 * make win32 compile 
git-svn-id: trunk@5103 -
2006-10-30 23:46:28 +00:00

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{
This unit implements support import,export,link routines
for the (arm) GameBoy Advance target
Copyright (c) 2001-2002 by Peter Vreman
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_gba;
{$i fpcdefs.inc}
interface
implementation
uses
link,
cutils,cclasses,
globtype,globals,systems,verbose,script,fmodule,i_gba;
type
TlinkerGBA=class(texternallinker)
private
Function WriteResponseFile: Boolean;
public
constructor Create; override;
procedure SetDefaultInfo; override;
function MakeExecutable:boolean; override;
end;
{*****************************************************************************
TLINKERGBA
*****************************************************************************}
Constructor TLinkerGba.Create;
begin
Inherited Create;
SharedLibFiles.doubles:=true;
StaticLibFiles.doubles:=true;
end;
procedure TLinkerGba.SetDefaultInfo;
begin
with Info do
begin
ExeCmd[1]:='ld -g $OPT $DYNLINK $STATIC $GCSECTIONS $STRIP -L. -o $EXE -T $RES';
end;
end;
Function TLinkerGba.WriteResponseFile: Boolean;
Var
linkres : TLinkRes;
i : longint;
HPath : TStringListItem;
s : string;
linklibc : boolean;
begin
WriteResponseFile:=False;
{ Open link.res file }
LinkRes:=TLinkRes.Create(outputexedir+Info.ResName);
{ Write path to search libraries }
HPath:=TStringListItem(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:=TStringListItem(HPath.Next);
end;
HPath:=TStringListItem(LibrarySearchPath.First);
while assigned(HPath) do
begin
s:=HPath.Str;
if s<>'' then
LinkRes.Add('SEARCH_DIR('+(maybequoted(s))+')');
HPath:=TStringListItem(HPath.Next);
end;
LinkRes.Add('INPUT (');
{ add objectfiles, start with prt0 always }
s:=FindObjectFile('prt0','',false);
LinkRes.AddFileName(s);
while not ObjectFiles.Empty do
begin
s:=ObjectFiles.GetFirst;
if s<>'' then
begin
{ vlink doesn't use SEARCH_DIR for object files }
if not(cs_link_on_target in current_settings.globalswitches) 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 (cs_link_on_target in current_settings.globalswitches) then
begin
LinkRes.Add(')');
LinkRes.Add('GROUP(');
end;
while not StaticLibFiles.Empty do
begin
S:=StaticLibFiles.GetFirst;
LinkRes.AddFileName((maybequoted(s)));
end;
end;
if (cs_link_on_target in current_settings.globalswitches) then
begin
LinkRes.Add(')');
{ Write sharedlibraries like -l<lib>, also add the needed dynamic linker
here to be sure that it gets linked this is needed for glibc2 systems (PFV) }
linklibc:=false;
while not SharedLibFiles.Empty do
begin
S:=SharedLibFiles.GetFirst;
if s<>'c' then
begin
i:=Pos(target_info.sharedlibext,S);
if i>0 then
Delete(S,i,255);
LinkRes.Add('-l'+s);
end
else
begin
LinkRes.Add('-l'+s);
linklibc:=true;
end;
end;
{ be sure that libc&libgcc is the last lib }
if linklibc then
begin
LinkRes.Add('-lc');
LinkRes.Add('-lgcc');
end;
end
else
begin
while not SharedLibFiles.Empty do
begin
S:=SharedLibFiles.GetFirst;
LinkRes.Add('lib'+s+target_info.staticlibext);
end;
LinkRes.Add(')');
end;
with linkres do
begin
add('/* Linker Script Original v1.3 by Jeff Frohwein */');
add('/* v1.0 - Original release */');
add('/* v1.1 - Added proper .data section support */');
add('/* v1.2 - Added support for c++ & iwram overlays */');
add('/* - Major contributions by Jason Wilkins. */');
add('/* v1.3 - .ewram section now can be used when */');
add('/* compiling for MULTIBOOT mode. This fixes */');
add('/* malloc() in DevKitAdvance which depends */');
add('/* on __eheap_start instead of end to define*/');
add('/* the starting location of heap space. */');
add('/* External global variable __gba_iwram_heap*/');
add('/* support added to allow labels end, _end, */');
add('/* & __end__ to point to end of iwram or */');
add('/* the end of ewram. */');
add('/* Additions by WinterMute */');
add('/* v1.4 - .sbss section added for unitialised */');
add('/* data in ewram */');
add('/* v1.5 - padding section added to stop EZF */');
add('/* stripping important data */');
add('');
add('/* This file is released into the public domain */');
add('/* for commercial or non-commercial use with no */');
add('/* restrictions placed upon it. */');
add('');
add('/* NOTE!!!: This linker script defines the RAM & */');
add('/* ROM start addresses. In order for it to work */');
add('/* properly, remove -Ttext and -Tbss linker */');
add('/* options from your makefile if they are */');
add('/* present. */');
add('');
add('/* You can use the following to view section */');
add('/* addresses in your .elf file: */');
add('/* objdump -h file.elf */');
add('/* Please note that empty sections may incorrectly*/');
add('/* list the lma address as the vma address for */');
add('/* some versions of objdump. */');
add('');
add('OUTPUT_FORMAT("elf32-littlearm", "elf32-bigarm", "elf32-littlearm")');
add('OUTPUT_ARCH(arm)');
add('ENTRY(_start)');
add('/* SEARCH_DIR(/bin/arm); */');
add('');
add('/* The linker script function "var1 += var2;" sometimes */');
add('/* reports incorrect values in the *.map file but the */');
add('/* actual value it calculates is usually, if not always, */');
add('/* correct. If you leave out the ". = ALIGN(4);" at the */');
add('/* end of each section then the return value of SIZEOF() */');
add('/* is sometimes incorrect and "var1 += var2;" appears to */');
add('/* not work as well. "var1 += var2" style functions are */');
add('/* avoided below as a result. */');
add('');
add('MEMORY {');
add('');
add('rom : ORIGIN = 0x08000000, LENGTH = 32M');
add('iwram : ORIGIN = 0x03000000, LENGTH = 32K');
add('ewram : ORIGIN = 0x02000000, LENGTH = 256K');
add('}');
add('');
add('/*');
add('__text_start = 0x8000000;');
add('__eheap_end = 0x2040000;');
add('__iwram_start = 0x3000000;');
add('__iwram_end = 0x3008000;');
add('');
add('__sp_irq = __iwram_end - 0x100;');
add('__sp_usr = __sp_irq - 0x100;');
add('*/');
add('__text_start = ORIGIN(rom);');
add('/* __eheap_end = ORIGIN(ewram) + 0x40000; */');
add('__eheap_end = ORIGIN(ewram) + LENGTH(ewram);');
add('__iwram_start = ORIGIN(iwram);');
add('/* __iwram_end = ORIGIN(iwram) + 0x8000; */');
add('__iwram_end = ORIGIN(iwram) + LENGTH(iwram); ');
add('__sp_irq = __iwram_end - 0x100;');
add('__sp_usr = __sp_irq - 0x100;');
add('');
add('');
add('SECTIONS');
add('{');
add('. = __text_start;');
add('.init :');
add('{');
add('KEEP (*(.init))');
add('. = ALIGN(4);');
add('} >rom =0xff');
add('');
add('.plt :');
add('{');
add('*(.plt)');
add('. = ALIGN(4); /* REQUIRED. LD is flaky without it. */');
add('} >rom');
add('');
add('.text : /* ALIGN (4): */');
add('{');
add('*(EXCLUDE_FILE (*.iwram*) .text)');
add('*(.text.*)');
add('*(.stub)');
add('/* .gnu.warning sections are handled specially by elf32.em. */');
add('*(.gnu.warning)');
add('*(.gnu.linkonce.t*)');
add('*(.glue_7)');
add('*(.glue_7t)');
add('. = ALIGN(4); /* REQUIRED. LD is flaky without it. */');
add('} >rom = 0xff');
add('');
add('__text_end = .;');
add('.fini :');
add('{');
add('KEEP (*(.fini))');
add('. = ALIGN(4); /* REQUIRED. LD is flaky without it. */');
add('} >rom =0');
add('');
add('.rodata :');
add('{');
add('*(.rodata)');
add('*all.rodata*(*)');
add('*(.roda)');
add('*(.rodata.*)');
add('*(.gnu.linkonce.r*)');
add('SORT(CONSTRUCTORS)');
add('. = ALIGN(4); /* REQUIRED. LD is flaky without it. */');
add('} >rom = 0xff');
add('');
add('.ctors :');
add('{');
add('/* gcc uses crtbegin.o to find the start of the constructors, so');
add('we make sure it is first. Because this is a wildcard, it');
add('doesn''t matter if the user does not actually link against');
add('crtbegin.o; the linker won''t look for a file to match a');
add('wildcard. The wildcard also means that it doesn''t matter which');
add('directory crtbegin.o is in. */');
add('KEEP (*crtbegin.o(.ctors))');
add('KEEP (*(EXCLUDE_FILE (*crtend.o) .ctors))');
add('KEEP (*(SORT(.ctors.*)))');
add('KEEP (*(.ctors))');
add('. = ALIGN(4); /* REQUIRED. LD is flaky without it. */');
add('} >rom = 0');
add('');
add('.dtors :');
add('{');
add('KEEP (*crtbegin.o(.dtors))');
add('KEEP (*(EXCLUDE_FILE (*crtend.o) .dtors))');
add('KEEP (*(SORT(.dtors.*)))');
add('KEEP (*(.dtors))');
add('. = ALIGN(4); /* REQUIRED. LD is flaky without it. */');
add('} >rom = 0');
add('');
add('.jcr : { KEEP (*(.jcr)) } >rom ');
add('');
add('.eh_frame :');
add('{');
add('KEEP (*(.eh_frame))');
add('. = ALIGN(4); /* REQUIRED. LD is flaky without it. */');
add('} >rom = 0');
add('');
add('.gcc_except_table :');
add('{');
add('*(.gcc_except_table)');
add('. = ALIGN(4); /* REQUIRED. LD is flaky without it. */');
add('} >rom = 0');
add('');
add('__iwram_lma = .;');
add('');
add('.iwram __iwram_start : AT (__iwram_lma)');
add('{');
add('__iwram_start = ABSOLUTE(.) ;');
add('*(.iwram)');
add('*iwram.*(.text)');
add('. = ALIGN(4); /* REQUIRED. LD is flaky without it. */');
add('} >iwram = 0xff');
add('');
add('__data_lma = __iwram_lma + SIZEOF(.iwram) ;');
add('__iwram_end = . ;');
add('');
add('.bss ALIGN(4) :');
add('{');
add('__bss_start = ABSOLUTE(.);');
add('__bss_start__ = ABSOLUTE(.);');
add('*(.dynbss)');
add('*(.gnu.linkonce.b*)');
add('*(.bss*)');
add('*(COMMON)');
add('. = ALIGN(4); /* REQUIRED. LD is flaky without it. */');
add('} >iwram');
add('');
add('__bss_end = . ;');
add('__bss_end__ = . ;');
add('');
add('.data ALIGN(4) : AT (__data_lma)');
add('{');
add('__data_start = ABSOLUTE(.);');
add('*(.data)');
add('*(.data.*)');
add('*(.gnu.linkonce.d*)');
add('CONSTRUCTORS');
add('. = ALIGN(4);');
add('} >iwram = 0xff');
add('');
add('__iwram_overlay_lma = __data_lma + SIZEOF(.data);');
add('');
add('__data_end = .;');
add('__iwram_overlay_start = . ;');
add('');
add('OVERLAY ALIGN(4) : NOCROSSREFS AT (__iwram_overlay_lma)');
add('{');
add('.iwram0 { *(.iwram0) . = ALIGN(4);}');
add('.iwram1 { *(.iwram1) . = ALIGN(4);}');
add('.iwram2 { *(.iwram2) . = ALIGN(4);}');
add('.iwram3 { *(.iwram3) . = ALIGN(4);}');
add('.iwram4 { *(.iwram4) . = ALIGN(4);}');
add('.iwram5 { *(.iwram5) . = ALIGN(4);}');
add('.iwram6 { *(.iwram6) . = ALIGN(4);}');
add('.iwram7 { *(.iwram7) . = ALIGN(4);}');
add('.iwram8 { *(.iwram8) . = ALIGN(4);}');
add('.iwram9 { *(.iwram9) . = ALIGN(4);}');
add('}>iwram = 0xff');
add('');
add('__ewram_lma = LOADADDR(.iwram0) + SIZEOF(.iwram0)+SIZEOF(.iwram1)+SIZEOF(.iwram2)+SIZEOF(.iwram3)+SIZEOF(.iwram4)+SIZEOF(.iwram5)+SIZEOF(.iwram6)+SIZEOF(.iwram7)+SIZEOF(.iwram8)+SIZEOF(.iwram9);');
add('');
add('__iwram_overlay_end = . ;');
add('__iheap_start = . ;');
add('');
add('__ewram_start = 0x2000000;');
add('.ewram __ewram_start : AT (__ewram_lma)');
add('{');
add('*(.ewram)');
add('. = ALIGN(4); /* REQUIRED. LD is flaky without it. */');
add('}>ewram = 0xff');
add('');
add('__ewram_overlay_lma = __ewram_lma + SIZEOF(.ewram);');
add('');
add('.sbss ALIGN(4):');
add('{');
add('__sbss_start = ABSOLUTE(.);');
add('*(.sbss)');
add('. = ALIGN(4);');
add('} >ewram');
add(' ');
add('__sbss_end = .;');
add('');
add('__ewram_end = . ;');
add('__ewram_overlay_start = . ;');
add('');
add('OVERLAY ALIGN(4): NOCROSSREFS AT (__ewram_overlay_lma)');
add('{');
add('.ewram0 { *(.ewram0) . = ALIGN(4);}');
add('.ewram1 { *(.ewram1) . = ALIGN(4);}');
add('.ewram2 { *(.ewram2) . = ALIGN(4);}');
add('.ewram3 { *(.ewram3) . = ALIGN(4);}');
add('.ewram4 { *(.ewram4) . = ALIGN(4);}');
add('.ewram5 { *(.ewram5) . = ALIGN(4);}');
add('.ewram6 { *(.ewram6) . = ALIGN(4);}');
add('.ewram7 { *(.ewram7) . = ALIGN(4);}');
add('.ewram8 { *(.ewram8) . = ALIGN(4);}');
add('.ewram9 { *(.ewram9) . = ALIGN(4);}');
add('}>ewram = 0xff');
add('');
add('__pad_lma = LOADADDR(.ewram0) + SIZEOF(.ewram0)+SIZEOF(.ewram1)+SIZEOF(.ewram2)+SIZEOF(.ewram3)+SIZEOF(.ewram4)+SIZEOF(.ewram5)+SIZEOF(.ewram6)+SIZEOF(.ewram7)+SIZEOF(.ewram8)+SIZEOF(.ewram9);');
add('');
add('/* EZF Advance strips trailing 0xff bytes, add a pad section so nothing important is removed */');
add('.pad ALIGN(4) : AT (__pad_lma)');
add('{');
add('LONG(0x52416b64)');
add('LONG(0x4d)');
add('. = ALIGN(4); /* REQUIRED. LD is flaky without it. */');
add('} = 0xff');
add('');
add('__ewram_overlay_end = . ;');
add('__eheap_start = . ;');
add('');
add('_end = .;');
add('__end__ = _end ; /* v1.3 */');
add('PROVIDE (end = _end); /* v1.3 */');
add('');
add('/* Stabs debugging sections. */');
add('.stab 0 : { *(.stab) }');
add('.stabstr 0 : { *(.stabstr) }');
add('.stab.excl 0 : { *(.stab.excl) }');
add('.stab.exclstr 0 : { *(.stab.exclstr) }');
add('.stab.index 0 : { *(.stab.index) }');
add('.stab.indexstr 0 : { *(.stab.indexstr) }');
add('.comment 0 : { *(.comment) }');
add('/* DWARF debug sections.');
add('Symbols in the DWARF debugging sections are relative to the beginning');
add('of the section so we begin them at 0. */');
add('/* DWARF 1 */');
add('.debug 0 : { *(.debug) }');
add('.line 0 : { *(.line) }');
add('/* GNU DWARF 1 extensions */');
add('.debug_srcinfo 0 : { *(.debug_srcinfo) }');
add('.debug_sfnames 0 : { *(.debug_sfnames) }');
add('/* DWARF 1.1 and DWARF 2 */');
add('.debug_aranges 0 : { *(.debug_aranges) }');
add('.debug_pubnames 0 : { *(.debug_pubnames) }');
add('/* DWARF 2 */');
add('.debug_info 0 : { *(.debug_info) }');
add('.debug_abbrev 0 : { *(.debug_abbrev) }');
add('.debug_line 0 : { *(.debug_line) }');
add('.debug_frame 0 : { *(.debug_frame) }');
add('.debug_str 0 : { *(.debug_str) }');
add('.debug_loc 0 : { *(.debug_loc) }');
add('.debug_macinfo 0 : { *(.debug_macinfo) }');
add('/* SGI/MIPS DWARF 2 extensions */');
add('.debug_weaknames 0 : { *(.debug_weaknames) }');
add('.debug_funcnames 0 : { *(.debug_funcnames) }');
add('.debug_typenames 0 : { *(.debug_typenames) }');
add('.debug_varnames 0 : { *(.debug_varnames) }');
add('.stack 0x80000 : { _stack = .; *(.stack) }');
add('/* These must appear regardless of . */');
add('}');
end;
{ Write and Close response }
linkres.writetodisk;
linkres.free;
WriteResponseFile:=True;
end;
function TLinkerGba.MakeExecutable:boolean;
var
binstr : string;
cmdstr : TCmdStr;
success : boolean;
StaticStr,
GCSectionsStr,
DynLinkStr,
StripStr: string;
begin
{ for future use }
StaticStr:='';
StripStr:='';
DynLinkStr:='';
GCSectionsStr:='--gc-sections';
//if not(cs_link_extern in current_settings.globalswitches) then
if not(cs_link_nolink in current_settings.globalswitches) then
Message1(exec_i_linking,current_module.exefilename^);
{ Write used files and libraries }
WriteResponseFile();
{ Call linker }
SplitBinCmd(Info.ExeCmd[1],binstr,cmdstr);
Replace(cmdstr,'$OPT',Info.ExtraOptions);
if not(cs_link_on_target in current_settings.globalswitches) then
begin
Replace(cmdstr,'$EXE',(maybequoted(ScriptFixFileName(ForceExtension(current_module.exefilename^,'.elf')))));
Replace(cmdstr,'$RES',(maybequoted(ScriptFixFileName(outputexedir+Info.ResName))));
Replace(cmdstr,'$STATIC',StaticStr);
Replace(cmdstr,'$STRIP',StripStr);
Replace(cmdstr,'$GCSECTIONS',GCSectionsStr);
Replace(cmdstr,'$DYNLINK',DynLinkStr);
end
else
begin
Replace(cmdstr,'$EXE',maybequoted(ScriptFixFileName(ForceExtension(current_module.exefilename^,'.elf'))));
Replace(cmdstr,'$RES',maybequoted(ScriptFixFileName(outputexedir+Info.ResName)));
Replace(cmdstr,'$STATIC',StaticStr);
Replace(cmdstr,'$STRIP',StripStr);
Replace(cmdstr,'$GCSECTIONS',GCSectionsStr);
Replace(cmdstr,'$DYNLINK',DynLinkStr);
end;
success:=DoExec(FindUtil(utilsprefix+BinStr),cmdstr,true,false);
{ Remove ReponseFile }
if (success) and not(cs_link_nolink in current_settings.globalswitches) then
DeleteFile(outputexedir+Info.ResName);
{ Post process }
if success then
begin
success:=DoExec(FindUtil(utilsprefix+'objcopy'),'-O binary '+
ForceExtension(current_module.exefilename^,'.elf')+' '+
current_module.exefilename^,true,false);
end;
MakeExecutable:=success; { otherwise a recursive call to link method }
end;
{*****************************************************************************
Initialize
*****************************************************************************}
initialization
RegisterExternalLinker(system_arm_gba_info,TLinkerGba);
RegisterTarget(system_arm_gba_info);
end.
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