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https://gitlab.com/freepascal.org/fpc/source.git
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953 lines
32 KiB
ObjectPascal
953 lines
32 KiB
ObjectPascal
{
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Copyright (c) 2015 by Nikolay Nikolov
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Contains the binary Relocatable Object Module Format (OMF) reader and writer
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This is the object format used on the i8086-msdos platform.
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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 ogomf;
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{$i fpcdefs.inc}
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interface
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uses
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{ common }
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cclasses,globtype,
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{ target }
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systems,
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{ assembler }
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cpuinfo,cpubase,aasmbase,assemble,link,
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{ OMF definitions }
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omfbase,
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{ output }
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ogbase,
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owbase;
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type
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{ TOmfRelocation }
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TOmfRelocation = class(TObjRelocation)
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private
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FOmfFixup: TOmfSubRecord_FIXUP;
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function GetGroupIndex(const groupname: string): Integer;
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public
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constructor CreateSection(ADataOffset:aword;aobjsec:TObjSection;Atyp:TObjRelocationType);
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destructor Destroy; override;
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procedure BuildOmfFixup;
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property OmfFixup: TOmfSubRecord_FIXUP read FOmfFixup;
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end;
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{ TOmfObjSection }
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TOmfObjSection = class(TObjSection)
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private
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FClassName: string;
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FOverlayName: string;
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FCombination: TOmfSegmentCombination;
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FUse: TOmfSegmentUse;
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FPrimaryGroup: string;
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function GetOmfAlignment: TOmfSegmentAlignment;
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public
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constructor create(AList:TFPHashObjectList;const Aname:string;Aalign:shortint;Aoptions:TObjSectionOptions);override;
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property ClassName: string read FClassName;
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property OverlayName: string read FOverlayName;
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property OmfAlignment: TOmfSegmentAlignment read GetOmfAlignment;
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property Combination: TOmfSegmentCombination read FCombination;
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property Use: TOmfSegmentUse read FUse;
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property PrimaryGroup: string read FPrimaryGroup;
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end;
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{ TOmfObjData }
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TOmfObjData = class(TObjData)
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private
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class function CodeSectionName(const aname:string): string;
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public
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constructor create(const n:string);override;
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function sectiontype2align(atype:TAsmSectiontype):shortint;override;
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function sectionname(atype:TAsmSectiontype;const aname:string;aorder:TAsmSectionOrder):string;override;
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procedure writeReloc(Data:aint;len:aword;p:TObjSymbol;Reloctype:TObjRelocationType);override;
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end;
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{ TOmfObjOutput }
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TOmfObjOutput = class(tObjOutput)
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private
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FLNames: TOmfOrderedNameCollection;
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FSegments: TFPHashObjectList;
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FGroups: TFPHashObjectList;
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procedure AddSegment(const name,segclass,ovlname: string;
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Alignment: TOmfSegmentAlignment; Combination: TOmfSegmentCombination;
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Use: TOmfSegmentUse; Size: aword);
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procedure AddGroup(const groupname: string; seglist: array of const);
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procedure AddGroup(const groupname: string; seglist: TSegmentList);
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procedure WriteSections(Data:TObjData);
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procedure WriteSectionContentAndFixups(sec: TObjSection);
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procedure section_count_sections(p:TObject;arg:pointer);
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procedure WritePUBDEFs(Data: TObjData);
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procedure WriteEXTDEFs(Data: TObjData);
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property LNames: TOmfOrderedNameCollection read FLNames;
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property Segments: TFPHashObjectList read FSegments;
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property Groups: TFPHashObjectList read FGroups;
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protected
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function writeData(Data:TObjData):boolean;override;
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public
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constructor create(AWriter:TObjectWriter);override;
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destructor Destroy;override;
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end;
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{ TOmfObjInput }
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TOmfObjInput = class(TObjInput)
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constructor create;override;
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class function CanReadObjData(AReader:TObjectreader):boolean;override;
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end;
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{ TMZExeOutput }
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TMZExeOutput = class(TExeOutput)
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constructor create;override;
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end;
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TOmfAssembler = class(tinternalassembler)
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constructor create(smart:boolean);override;
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end;
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implementation
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uses
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SysUtils,
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cutils,verbose,globals,
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fmodule,aasmtai,aasmdata,
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ogmap,owomflib,
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version
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;
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{****************************************************************************
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TOmfRelocation
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****************************************************************************}
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function TOmfRelocation.GetGroupIndex(const groupname: string): Integer;
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begin
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if groupname='dgroup' then
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Result:=1
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else
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internalerror(2014040703);
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end;
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constructor TOmfRelocation.CreateSection(ADataOffset: aword; aobjsec: TObjSection; Atyp: TObjRelocationType);
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begin
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if not (Atyp in [RELOC_DGROUP,RELOC_DGROUPREL]) and not assigned(aobjsec) then
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internalerror(200603036);
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DataOffset:=ADataOffset;
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Symbol:=nil;
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OrgSize:=0;
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ObjSection:=aobjsec;
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ftype:=ord(Atyp);
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end;
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destructor TOmfRelocation.Destroy;
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begin
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FOmfFixup.Free;
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inherited Destroy;
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end;
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procedure TOmfRelocation.BuildOmfFixup;
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begin
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FreeAndNil(FOmfFixup);
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FOmfFixup:=TOmfSubRecord_FIXUP.Create;
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if ObjSection<>nil then
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begin
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FOmfFixup.LocationOffset:=DataOffset;
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if typ in [RELOC_ABSOLUTE,RELOC_RELATIVE] then
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FOmfFixup.LocationType:=fltOffset
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else if typ in [RELOC_SEG,RELOC_SEGREL] then
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FOmfFixup.LocationType:=fltBase
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else
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internalerror(2015041501);
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FOmfFixup.FrameDeterminedByThread:=False;
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FOmfFixup.TargetDeterminedByThread:=False;
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if typ in [RELOC_ABSOLUTE,RELOC_SEG] then
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FOmfFixup.Mode:=fmSegmentRelative
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else if typ in [RELOC_RELATIVE,RELOC_SEGREL] then
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FOmfFixup.Mode:=fmSelfRelative
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else
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internalerror(2015041401);
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if typ in [RELOC_ABSOLUTE,RELOC_RELATIVE] then
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begin
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FOmfFixup.TargetMethod:=ftmSegmentIndexNoDisp;
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FOmfFixup.TargetDatum:=ObjSection.Index;
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if TOmfObjSection(ObjSection).PrimaryGroup<>'' then
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begin
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FOmfFixup.FrameMethod:=ffmGroupIndex;
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FOmfFixup.FrameDatum:=GetGroupIndex(TOmfObjSection(ObjSection).PrimaryGroup);
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end
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else
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FOmfFixup.FrameMethod:=ffmTarget;
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end
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else
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begin
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FOmfFixup.FrameMethod:=ffmTarget;
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if TOmfObjSection(ObjSection).PrimaryGroup<>'' then
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begin
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FOmfFixup.TargetMethod:=ftmGroupIndexNoDisp;
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FOmfFixup.TargetDatum:=GetGroupIndex(TOmfObjSection(ObjSection).PrimaryGroup);
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end
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else
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begin
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FOmfFixup.TargetMethod:=ftmSegmentIndexNoDisp;
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FOmfFixup.TargetDatum:=ObjSection.Index;
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end;
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end;
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end
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else if symbol<>nil then
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begin
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FOmfFixup.LocationOffset:=DataOffset;
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if typ in [RELOC_ABSOLUTE,RELOC_RELATIVE] then
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FOmfFixup.LocationType:=fltOffset
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else if typ in [RELOC_SEG,RELOC_SEGREL] then
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FOmfFixup.LocationType:=fltBase
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else
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internalerror(2015041501);
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FOmfFixup.FrameDeterminedByThread:=False;
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FOmfFixup.TargetDeterminedByThread:=False;
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if typ in [RELOC_ABSOLUTE,RELOC_SEG] then
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FOmfFixup.Mode:=fmSegmentRelative
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else if typ in [RELOC_RELATIVE,RELOC_SEGREL] then
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FOmfFixup.Mode:=fmSelfRelative
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else
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internalerror(2015041401);
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FOmfFixup.TargetMethod:=ftmExternalIndexNoDisp;
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FOmfFixup.TargetDatum:=symbol.symidx;
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FOmfFixup.FrameMethod:=ffmTarget;
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end
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else if typ in [RELOC_DGROUP,RELOC_DGROUPREL] then
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begin
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FOmfFixup.LocationOffset:=DataOffset;
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FOmfFixup.LocationType:=fltBase;
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FOmfFixup.FrameDeterminedByThread:=False;
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FOmfFixup.TargetDeterminedByThread:=False;
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if typ=RELOC_DGROUP then
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FOmfFixup.Mode:=fmSegmentRelative
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else if typ=RELOC_DGROUPREL then
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FOmfFixup.Mode:=fmSelfRelative
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else
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internalerror(2015041401);
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FOmfFixup.FrameMethod:=ffmTarget;
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FOmfFixup.TargetMethod:=ftmGroupIndexNoDisp;
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FOmfFixup.TargetDatum:=GetGroupIndex('dgroup');
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end
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else
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internalerror(2015040702);
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end;
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{****************************************************************************
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TOmfObjSection
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****************************************************************************}
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function TOmfObjSection.GetOmfAlignment: TOmfSegmentAlignment;
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begin
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case SecAlign of
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1:
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result:=saRelocatableByteAligned;
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2:
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result:=saRelocatableWordAligned;
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4:
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result:=saRelocatableDWordAligned;
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16:
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result:=saRelocatableParaAligned;
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else
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internalerror(2015041504);
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end;
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end;
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constructor TOmfObjSection.create(AList: TFPHashObjectList;
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const Aname: string; Aalign: shortint; Aoptions: TObjSectionOptions);
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var
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dgroup: Boolean;
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begin
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inherited create(AList, Aname, Aalign, Aoptions);
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FCombination:=scPublic;
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FUse:=suUse16;
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if oso_executable in Aoptions then
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begin
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FClassName:='code';
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dgroup:=(current_settings.x86memorymodel=mm_tiny);
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end
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else if Aname='stack' then
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begin
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FClassName:='stack';
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FCombination:=scStack;
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dgroup:=current_settings.x86memorymodel in (x86_near_data_models-[mm_tiny]);
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end
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else if Aname='heap' then
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begin
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FClassName:='heap';
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dgroup:=current_settings.x86memorymodel in x86_near_data_models;
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end
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else if Aname='bss' then
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begin
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FClassName:='bss';
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dgroup:=true;
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end
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else if Aname='data' then
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begin
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FClassName:='data';
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dgroup:=true;
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end
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else if (Aname='debug_frame') or
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(Aname='debug_info') or
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(Aname='debug_line') or
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(Aname='debug_abbrev') then
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begin
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FClassName:='DWARF';
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FUse:=suUse32;
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dgroup:=false;
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end
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else
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begin
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FClassName:='data';
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dgroup:=true;
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end;
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if dgroup then
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FPrimaryGroup:='dgroup'
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else
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FPrimaryGroup:='';
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end;
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{****************************************************************************
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TOmfObjData
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****************************************************************************}
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class function TOmfObjData.CodeSectionName(const aname: string): string;
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begin
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{$ifdef i8086}
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if current_settings.x86memorymodel in x86_far_code_models then
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begin
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if cs_huge_code in current_settings.moduleswitches then
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result:=aname + '_TEXT'
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else
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result:=current_module.modulename^ + '_TEXT';
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end
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else
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{$endif}
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result:='text';
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end;
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constructor TOmfObjData.create(const n: string);
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begin
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inherited create(n);
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CObjSection:=TOmfObjSection;
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end;
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function TOmfObjData.sectiontype2align(atype: TAsmSectiontype): shortint;
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begin
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case atype of
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sec_stabstr:
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result:=1;
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sec_code:
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result:=1;
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sec_data,
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sec_rodata,
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sec_rodata_norel,
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sec_bss:
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result:=2;
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{ For idata (at least idata2) it must be 4 bytes, because
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an entry is always (also in win64) 20 bytes and aligning
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on 8 bytes will insert 4 bytes between the entries resulting
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in a corrupt idata section.
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Same story with .pdata, it has 4-byte elements which should
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be packed without gaps. }
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sec_idata2,sec_idata4,sec_idata5,sec_idata6,sec_idata7,sec_pdata:
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result:=4;
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sec_debug_frame,sec_debug_info,sec_debug_line,sec_debug_abbrev:
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result:=4;
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sec_stack,
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sec_heap:
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result:=16;
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else
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result:=1;
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end;
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end;
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function TOmfObjData.sectionname(atype:TAsmSectiontype;const aname:string;aorder:TAsmSectionOrder):string;
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const
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secnames : array[TAsmSectiontype] of string[length('__DATA, __datacoal_nt,coalesced')] = ('','',
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'text',
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'data',
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'data',
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'rodata',
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'bss',
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'tbss',
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'pdata',
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'text','data','data','data','data',
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'stab',
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'stabstr',
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'idata2','idata4','idata5','idata6','idata7','edata',
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'eh_frame',
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'debug_frame','debug_info','debug_line','debug_abbrev',
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'fpc',
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'',
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'init',
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'fini',
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'objc_class',
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'objc_meta_class',
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'objc_cat_cls_meth',
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'objc_cat_inst_meth',
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'objc_protocol',
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'objc_string_object',
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'objc_cls_meth',
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'objc_inst_meth',
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'objc_cls_refs',
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'objc_message_refs',
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'objc_symbols',
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'objc_category',
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'objc_class_vars',
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'objc_instance_vars',
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'objc_module_info',
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'objc_class_names',
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'objc_meth_var_types',
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'objc_meth_var_names',
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'objc_selector_strs',
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'objc_protocol_ext',
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'objc_class_ext',
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'objc_property',
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'objc_image_info',
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'objc_cstring_object',
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'objc_sel_fixup',
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'__DATA,__objc_data',
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'__DATA,__objc_const',
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'objc_superrefs',
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'__DATA, __datacoal_nt,coalesced',
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'objc_classlist',
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'objc_nlclasslist',
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'objc_catlist',
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'obcj_nlcatlist',
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'objc_protolist',
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'stack',
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'heap'
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);
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begin
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if (atype=sec_user) then
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Result:=aname
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else if secnames[atype]='text' then
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Result:=CodeSectionName(aname)
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else
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Result:=secnames[atype];
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end;
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procedure TOmfObjData.writeReloc(Data:aint;len:aword;p:TObjSymbol;Reloctype:TObjRelocationType);
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var
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objreloc: TOmfRelocation;
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symaddr: AWord;
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begin
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{ RELOC_FARPTR = RELOC_ABSOLUTE+RELOC_SEG }
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if Reloctype=RELOC_FARPTR then
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begin
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if len<>4 then
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internalerror(2015041502);
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writeReloc(Data,2,p,RELOC_ABSOLUTE);
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writeReloc(0,2,p,RELOC_SEG);
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exit;
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end;
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if CurrObjSec=nil then
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internalerror(200403072);
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objreloc:=nil;
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if assigned(p) then
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begin
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{ real address of the symbol }
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symaddr:=p.address;
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if p.bind=AB_EXTERNAL then
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begin
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objreloc:=TOmfRelocation.CreateSymbol(CurrObjSec.Size,p,Reloctype);
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CurrObjSec.ObjRelocations.Add(objreloc);
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end
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{ relative relocations within the same section can be calculated directly,
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without the need to emit a relocation entry }
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else if (p.objsection=CurrObjSec) and
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(p.bind<>AB_COMMON) and
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(Reloctype=RELOC_RELATIVE) then
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begin
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data:=data+symaddr-len-CurrObjSec.Size;
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end
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else
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begin
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objreloc:=TOmfRelocation.CreateSection(CurrObjSec.Size,p.objsection,Reloctype);
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CurrObjSec.ObjRelocations.Add(objreloc);
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if not (Reloctype in [RELOC_SEG,RELOC_SEGREL]) then
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inc(data,symaddr);
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end;
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end
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else if Reloctype in [RELOC_DGROUP,RELOC_DGROUPREL] then
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begin
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objreloc:=TOmfRelocation.CreateSection(CurrObjSec.Size,nil,Reloctype);
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CurrObjSec.ObjRelocations.Add(objreloc);
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end;
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CurrObjSec.write(data,len);
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end;
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{****************************************************************************
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TOmfObjOutput
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****************************************************************************}
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procedure TOmfObjOutput.AddSegment(const name, segclass, ovlname: string;
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Alignment: TOmfSegmentAlignment; Combination: TOmfSegmentCombination;
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Use: TOmfSegmentUse; Size: aword);
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var
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s: TOmfRecord_SEGDEF;
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begin
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s:=TOmfRecord_SEGDEF.Create;
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Segments.Add(name,s);
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s.SegmentNameIndex:=LNames.Add(name);
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s.ClassNameIndex:=LNames.Add(segclass);
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s.OverlayNameIndex:=LNames.Add(ovlname);
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s.Alignment:=Alignment;
|
|
s.Combination:=Combination;
|
|
s.Use:=Use;
|
|
s.SegmentLength:=Size;
|
|
end;
|
|
|
|
procedure TOmfObjOutput.AddGroup(const groupname: string; seglist: array of const);
|
|
var
|
|
g: TOmfRecord_GRPDEF;
|
|
I: Integer;
|
|
SegListStr: TSegmentList;
|
|
begin
|
|
g:=TOmfRecord_GRPDEF.Create;
|
|
Groups.Add(groupname,g);
|
|
g.GroupNameIndex:=LNames.Add(groupname);
|
|
SetLength(SegListStr,Length(seglist));
|
|
for I:=0 to High(seglist) do
|
|
begin
|
|
case seglist[I].VType of
|
|
vtString:
|
|
SegListStr[I]:=Segments.FindIndexOf(seglist[I].VString^);
|
|
vtAnsiString:
|
|
SegListStr[I]:=Segments.FindIndexOf(AnsiString(seglist[I].VAnsiString));
|
|
vtWideString:
|
|
SegListStr[I]:=Segments.FindIndexOf(AnsiString(WideString(seglist[I].VWideString)));
|
|
vtUnicodeString:
|
|
SegListStr[I]:=Segments.FindIndexOf(AnsiString(UnicodeString(seglist[I].VUnicodeString)));
|
|
else
|
|
internalerror(2015040402);
|
|
end;
|
|
end;
|
|
g.SegmentList:=SegListStr;
|
|
end;
|
|
|
|
procedure TOmfObjOutput.AddGroup(const groupname: string; seglist: TSegmentList);
|
|
var
|
|
g: TOmfRecord_GRPDEF;
|
|
begin
|
|
g:=TOmfRecord_GRPDEF.Create;
|
|
Groups.Add(groupname,g);
|
|
g.GroupNameIndex:=LNames.Add(groupname);
|
|
g.SegmentList:=Copy(seglist);
|
|
end;
|
|
|
|
procedure TOmfObjOutput.WriteSections(Data: TObjData);
|
|
var
|
|
i:longint;
|
|
sec:TObjSection;
|
|
begin
|
|
for i:=0 to Data.ObjSectionList.Count-1 do
|
|
begin
|
|
sec:=TObjSection(Data.ObjSectionList[i]);
|
|
WriteSectionContentAndFixups(sec);
|
|
end;
|
|
end;
|
|
|
|
procedure TOmfObjOutput.WriteSectionContentAndFixups(sec: TObjSection);
|
|
const
|
|
MaxChunkSize=$3fa;
|
|
var
|
|
RawRecord: TOmfRawRecord;
|
|
ChunkStart,ChunkLen: DWord;
|
|
ChunkFixupStart,ChunkFixupEnd: Integer;
|
|
SegIndex: Integer;
|
|
NextOfs: Integer;
|
|
I: Integer;
|
|
begin
|
|
if (oso_data in sec.SecOptions) then
|
|
begin
|
|
if sec.Data=nil then
|
|
internalerror(200403073);
|
|
for I:=0 to sec.ObjRelocations.Count-1 do
|
|
TOmfRelocation(sec.ObjRelocations[I]).BuildOmfFixup;
|
|
SegIndex:=Segments.FindIndexOf(sec.Name);
|
|
RawRecord:=TOmfRawRecord.Create;
|
|
sec.data.seek(0);
|
|
ChunkFixupStart:=0;
|
|
ChunkFixupEnd:=-1;
|
|
ChunkStart:=0;
|
|
ChunkLen:=Min(MaxChunkSize, sec.Data.size-ChunkStart);
|
|
while ChunkLen>0 do
|
|
begin
|
|
{ find last fixup in the chunk }
|
|
while (ChunkFixupEnd<(sec.ObjRelocations.Count-1)) and
|
|
(TOmfRelocation(sec.ObjRelocations[ChunkFixupEnd+1]).DataOffset<(ChunkStart+ChunkLen)) do
|
|
inc(ChunkFixupEnd);
|
|
{ check if last chunk is crossing the chunk boundary, and trim ChunkLen if necessary }
|
|
if (ChunkFixupEnd>=ChunkFixupStart) and
|
|
((TOmfRelocation(sec.ObjRelocations[ChunkFixupEnd]).DataOffset+
|
|
TOmfRelocation(sec.ObjRelocations[ChunkFixupEnd]).OmfFixup.LocationSize)>(ChunkStart+ChunkLen)) then
|
|
begin
|
|
ChunkLen:=TOmfRelocation(sec.ObjRelocations[ChunkFixupEnd]).DataOffset-ChunkStart;
|
|
Dec(ChunkFixupEnd);
|
|
end;
|
|
{ write LEDATA record }
|
|
RawRecord.RecordType:=RT_LEDATA;
|
|
NextOfs:=RawRecord.WriteIndexedRef(0,SegIndex);
|
|
RawRecord.RawData[NextOfs]:=Byte(ChunkStart);
|
|
RawRecord.RawData[NextOfs+1]:=Byte(ChunkStart shr 8);
|
|
Inc(NextOfs,2);
|
|
sec.data.read(RawRecord.RawData[NextOfs], ChunkLen);
|
|
Inc(NextOfs, ChunkLen);
|
|
RawRecord.RecordLength:=NextOfs+1;
|
|
RawRecord.CalculateChecksumByte;
|
|
RawRecord.WriteTo(FWriter);
|
|
{ write FIXUPP record }
|
|
if ChunkFixupEnd>=ChunkFixupStart then
|
|
begin
|
|
RawRecord.RecordType:=RT_FIXUPP;
|
|
NextOfs:=0;
|
|
for I:=ChunkFixupStart to ChunkFixupEnd do
|
|
begin
|
|
TOmfRelocation(sec.ObjRelocations[I]).OmfFixup.DataRecordStartOffset:=ChunkStart;
|
|
NextOfs:=TOmfRelocation(sec.ObjRelocations[I]).OmfFixup.WriteAt(RawRecord,NextOfs);
|
|
end;
|
|
RawRecord.RecordLength:=NextOfs+1;
|
|
RawRecord.CalculateChecksumByte;
|
|
RawRecord.WriteTo(FWriter);
|
|
end;
|
|
{ prepare next chunk }
|
|
Inc(ChunkStart, ChunkLen);
|
|
ChunkLen:=Min(MaxChunkSize, sec.Data.size-ChunkStart);
|
|
ChunkFixupStart:=ChunkFixupEnd+1;
|
|
end;
|
|
RawRecord.Free;
|
|
end;
|
|
end;
|
|
|
|
procedure TOmfObjOutput.section_count_sections(p: TObject; arg: pointer);
|
|
begin
|
|
TOmfObjSection(p).index:=pinteger(arg)^;
|
|
inc(pinteger(arg)^);
|
|
end;
|
|
|
|
procedure TOmfObjOutput.WritePUBDEFs(Data: TObjData);
|
|
var
|
|
PubNamesForSection: array of TFPHashObjectList;
|
|
i: Integer;
|
|
objsym: TObjSymbol;
|
|
PublicNameElem: TOmfPublicNameElement;
|
|
RawRecord: TOmfRawRecord;
|
|
PubDefRec: TOmfRecord_PUBDEF;
|
|
PrimaryGroupName: string;
|
|
begin
|
|
RawRecord:=TOmfRawRecord.Create;
|
|
SetLength(PubNamesForSection,Data.ObjSectionList.Count);
|
|
for i:=0 to Data.ObjSectionList.Count-1 do
|
|
PubNamesForSection[i]:=TFPHashObjectList.Create;
|
|
|
|
for i:=0 to Data.ObjSymbolList.Count-1 do
|
|
begin
|
|
objsym:=TObjSymbol(Data.ObjSymbolList[i]);
|
|
if objsym.bind=AB_GLOBAL then
|
|
begin
|
|
PublicNameElem:=TOmfPublicNameElement.Create(PubNamesForSection[objsym.objsection.index-1],objsym.Name);
|
|
PublicNameElem.PublicOffset:=objsym.offset;
|
|
end;
|
|
end;
|
|
|
|
for i:=0 to Data.ObjSectionList.Count-1 do
|
|
if PubNamesForSection[i].Count>0 then
|
|
begin
|
|
PubDefRec:=TOmfRecord_PUBDEF.Create;
|
|
PubDefRec.BaseSegmentIndex:=i+1;
|
|
PrimaryGroupName:=TOmfObjSection(Data.ObjSectionList[i]).PrimaryGroup;
|
|
if PrimaryGroupName<>'' then
|
|
PubDefRec.BaseGroupIndex:=Groups.FindIndexOf(PrimaryGroupName)
|
|
else
|
|
PubDefRec.BaseGroupIndex:=0;
|
|
PubDefRec.PublicNames:=PubNamesForSection[i];
|
|
while PubDefRec.NextIndex<PubDefRec.PublicNames.Count do
|
|
begin
|
|
PubDefRec.EncodeTo(RawRecord);
|
|
RawRecord.WriteTo(FWriter);
|
|
end;
|
|
PubDefRec.Free;
|
|
end;
|
|
|
|
for i:=0 to Data.ObjSectionList.Count-1 do
|
|
FreeAndNil(PubNamesForSection[i]);
|
|
RawRecord.Free;
|
|
end;
|
|
|
|
procedure TOmfObjOutput.WriteEXTDEFs(Data: TObjData);
|
|
var
|
|
ExtNames: TFPHashObjectList;
|
|
RawRecord: TOmfRawRecord;
|
|
i,idx: Integer;
|
|
objsym: TObjSymbol;
|
|
ExternalNameElem: TOmfExternalNameElement;
|
|
ExtDefRec: TOmfRecord_EXTDEF;
|
|
begin
|
|
ExtNames:=TFPHashObjectList.Create;
|
|
RawRecord:=TOmfRawRecord.Create;
|
|
|
|
idx:=1;
|
|
for i:=0 to Data.ObjSymbolList.Count-1 do
|
|
begin
|
|
objsym:=TObjSymbol(Data.ObjSymbolList[i]);
|
|
if objsym.bind=AB_EXTERNAL then
|
|
begin
|
|
ExternalNameElem:=TOmfExternalNameElement.Create(ExtNames,objsym.Name);
|
|
objsym.symidx:=idx;
|
|
Inc(idx);
|
|
end;
|
|
end;
|
|
|
|
if ExtNames.Count>0 then
|
|
begin
|
|
ExtDefRec:=TOmfRecord_EXTDEF.Create;
|
|
ExtDefRec.ExternalNames:=ExtNames;
|
|
while ExtDefRec.NextIndex<ExtDefRec.ExternalNames.Count do
|
|
begin
|
|
ExtDefRec.EncodeTo(RawRecord);
|
|
RawRecord.WriteTo(FWriter);
|
|
end;
|
|
ExtDefRec.Free;
|
|
end;
|
|
|
|
ExtNames.Free;
|
|
RawRecord.Free;
|
|
end;
|
|
|
|
function TOmfObjOutput.writeData(Data:TObjData):boolean;
|
|
var
|
|
RawRecord: TOmfRawRecord;
|
|
Header: TOmfRecord_THEADR;
|
|
Translator_COMENT: TOmfRecord_COMENT;
|
|
LinkPassSeparator_COMENT: TOmfRecord_COMENT;
|
|
LNamesRec: TOmfRecord_LNAMES;
|
|
ModEnd: TOmfRecord_MODEND;
|
|
I: Integer;
|
|
SegDef: TOmfRecord_SEGDEF;
|
|
GrpDef: TOmfRecord_GRPDEF;
|
|
DGroupSegments: TSegmentList;
|
|
nsections: Integer;
|
|
begin
|
|
{ calc amount of sections we have and set their index, starting with 1 }
|
|
nsections:=1;
|
|
data.ObjSectionList.ForEachCall(@section_count_sections,@nsections);
|
|
{ maximum amount of sections supported in the omf format is $7fff }
|
|
if (nsections-1)>$7fff then
|
|
internalerror(2015040701);
|
|
|
|
{ write header record }
|
|
RawRecord:=TOmfRawRecord.Create;
|
|
Header:=TOmfRecord_THEADR.Create;
|
|
Header.ModuleName:=Data.Name;
|
|
Header.EncodeTo(RawRecord);
|
|
RawRecord.WriteTo(FWriter);
|
|
Header.Free;
|
|
|
|
{ write translator COMENT header }
|
|
Translator_COMENT:=TOmfRecord_COMENT.Create;
|
|
Translator_COMENT.CommentClass:=CC_Translator;
|
|
Translator_COMENT.CommentString:='FPC '+full_version_string+
|
|
' ['+date_string+'] for '+target_cpu_string+' - '+target_info.shortname;
|
|
Translator_COMENT.EncodeTo(RawRecord);
|
|
RawRecord.WriteTo(FWriter);
|
|
Translator_COMENT.Free;
|
|
|
|
LNames.Clear;
|
|
LNames.Add(''); { insert an empty string, which has index 1 }
|
|
FSegments.Clear;
|
|
FSegments.Add('',nil);
|
|
FGroups.Clear;
|
|
FGroups.Add('',nil);
|
|
|
|
for i:=0 to Data.ObjSectionList.Count-1 do
|
|
with TOmfObjSection(Data.ObjSectionList[I]) do
|
|
AddSegment(Name,ClassName,OverlayName,OmfAlignment,Combination,Use,Size);
|
|
|
|
|
|
{ create group "dgroup" }
|
|
SetLength(DGroupSegments,0);
|
|
for i:=0 to Data.ObjSectionList.Count-1 do
|
|
with TOmfObjSection(Data.ObjSectionList[I]) do
|
|
if PrimaryGroup='dgroup' then
|
|
begin
|
|
SetLength(DGroupSegments,Length(DGroupSegments)+1);
|
|
DGroupSegments[High(DGroupSegments)]:=index;
|
|
end;
|
|
AddGroup('dgroup',DGroupSegments);
|
|
|
|
{ write LNAMES record(s) }
|
|
LNamesRec:=TOmfRecord_LNAMES.Create;
|
|
LNamesRec.Names:=LNames;
|
|
while LNamesRec.NextIndex<=LNames.Count do
|
|
begin
|
|
LNamesRec.EncodeTo(RawRecord);
|
|
RawRecord.WriteTo(FWriter);
|
|
end;
|
|
LNamesRec.Free;
|
|
|
|
{ write SEGDEF record(s) }
|
|
for I:=1 to Segments.Count-1 do
|
|
begin
|
|
SegDef:=TOmfRecord_SEGDEF(Segments[I]);
|
|
SegDef.EncodeTo(RawRecord);
|
|
RawRecord.WriteTo(FWriter);
|
|
end;
|
|
|
|
{ write GRPDEF record(s) }
|
|
for I:=1 to Groups.Count-1 do
|
|
begin
|
|
GrpDef:=TOmfRecord_GRPDEF(Groups[I]);
|
|
GrpDef.EncodeTo(RawRecord);
|
|
RawRecord.WriteTo(FWriter);
|
|
end;
|
|
|
|
{ write PUBDEF record(s) }
|
|
WritePUBDEFs(Data);
|
|
|
|
{ write EXTDEF record(s) }
|
|
WriteEXTDEFs(Data);
|
|
|
|
{ write link pass separator }
|
|
LinkPassSeparator_COMENT:=TOmfRecord_COMENT.Create;
|
|
LinkPassSeparator_COMENT.CommentClass:=CC_LinkPassSeparator;
|
|
LinkPassSeparator_COMENT.CommentString:=#1;
|
|
LinkPassSeparator_COMENT.NoList:=True;
|
|
LinkPassSeparator_COMENT.EncodeTo(RawRecord);
|
|
RawRecord.WriteTo(FWriter);
|
|
LinkPassSeparator_COMENT.Free;
|
|
|
|
{ write section content, interleaved with fixups }
|
|
WriteSections(Data);
|
|
|
|
{ write MODEND record }
|
|
ModEnd:=TOmfRecord_MODEND.Create;
|
|
ModEnd.EncodeTo(RawRecord);
|
|
RawRecord.WriteTo(FWriter);
|
|
ModEnd.Free;
|
|
|
|
RawRecord.Free;
|
|
result:=true;
|
|
end;
|
|
|
|
constructor TOmfObjOutput.create(AWriter:TObjectWriter);
|
|
begin
|
|
inherited create(AWriter);
|
|
cobjdata:=TOmfObjData;
|
|
FLNames:=TOmfOrderedNameCollection.Create;
|
|
FSegments:=TFPHashObjectList.Create;
|
|
FSegments.Add('',nil);
|
|
FGroups:=TFPHashObjectList.Create;
|
|
FGroups.Add('',nil);
|
|
end;
|
|
|
|
destructor TOmfObjOutput.Destroy;
|
|
begin
|
|
FGroups.Free;
|
|
FSegments.Free;
|
|
FLNames.Free;
|
|
inherited Destroy;
|
|
end;
|
|
|
|
{****************************************************************************
|
|
TOmfObjInput
|
|
****************************************************************************}
|
|
|
|
constructor TOmfObjInput.create;
|
|
begin
|
|
inherited create;
|
|
cobjdata:=TOmfObjData;
|
|
end;
|
|
|
|
class function TOmfObjInput.CanReadObjData(AReader: TObjectreader): boolean;
|
|
var
|
|
b: Byte;
|
|
begin
|
|
result:=false;
|
|
if AReader.Read(b,sizeof(b)) then
|
|
begin
|
|
if b=RT_THEADR then
|
|
{ TODO: check additional fields }
|
|
result:=true;
|
|
end;
|
|
AReader.Seek(0);
|
|
end;
|
|
|
|
{****************************************************************************
|
|
TMZExeOutput
|
|
****************************************************************************}
|
|
|
|
constructor TMZExeOutput.create;
|
|
begin
|
|
inherited create;
|
|
CObjData:=TOmfObjData;
|
|
end;
|
|
|
|
{****************************************************************************
|
|
TOmfAssembler
|
|
****************************************************************************}
|
|
|
|
constructor TOmfAssembler.Create(smart:boolean);
|
|
begin
|
|
inherited Create(smart);
|
|
CObjOutput:=TOmfObjOutput;
|
|
CInternalAr:=TOmfLibObjectWriter;
|
|
end;
|
|
|
|
{*****************************************************************************
|
|
Initialize
|
|
*****************************************************************************}
|
|
{$ifdef i8086}
|
|
const
|
|
as_i8086_omf_info : tasminfo =
|
|
(
|
|
id : as_i8086_omf;
|
|
idtxt : 'OMF';
|
|
asmbin : '';
|
|
asmcmd : '';
|
|
supported_targets : [system_i8086_msdos];
|
|
flags : [af_outputbinary,af_no_debug];
|
|
labelprefix : '..@';
|
|
comment : '; ';
|
|
dollarsign: '$';
|
|
);
|
|
{$endif i8086}
|
|
|
|
initialization
|
|
{$ifdef i8086}
|
|
RegisterAssembler(as_i8086_omf_info,TOmfAssembler);
|
|
{$endif i8086}
|
|
end.
|