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unit fpDbgSymTableContext;
{$mode objfpc}{$H+}
interface
uses
Classes,
SysUtils,
FpDbgLoader,
FpImgReaderBase,
DbgIntfBaseTypes,
fpDbgSymTable,
FpdMemoryTools,
FpDbgInfo,
FpDbgCommon;
type
{ TFpSymbolTableProc }
TFpSymbolTableProc = class(TFpSymbol)
public
constructor Create(const AName: String; AnAddr: TDbgPtr);
end;
TFpSymbolInfo = class;
{ TFpSymbolContext }
TFpSymbolContext = class(TFpDbgSymbolScope)
private
FFpSymbolInfo: TFpSymbolInfo;
FSizeOfAddress: integer;
protected
function GetSizeOfAddress: Integer; override;
public
constructor Create(ALocationContext: TFpDbgLocationContext; AFpSymbolInfo: TFpSymbolInfo);
function FindSymbol(const AName: String; const OnlyUnitName: String = ''): TFpValue; override;
end;
{ TFpSymbolInfo }
TFpSymbolInfo = class(TDbgInfo)
private
FSymbolList: TfpSymbolList;
FLibName: String;
public
constructor Create(ALoaderList: TDbgImageLoaderList; AMemManager: TFpDbgMemManager); override;
constructor Create(ALoaderList: TDbgImageLoaderList; AMemManager: TFpDbgMemManager; ALibName: String);
destructor Destroy; override;
function FindSymbolScope(ALocationContext: TFpDbgLocationContext; AAddress: TDbgPtr = 0): TFpDbgSymbolScope; override;
function FindProcSymbol(const AName: String): TFpSymbol; override; overload;
function FindProcSymbol(AnAdress: TDbgPtr): TFpSymbol; overload;
end;
implementation
{ TFpSymbolTableProc }
constructor TFpSymbolTableProc.Create(const AName: String; AnAddr: TDbgPtr);
begin
inherited Create(AName);
SetAddress(TargetLoc(AnAddr));
SetKind(skProcedure);
SetSymbolType(stType);
end;
{ TFpSymbolContext }
function TFpSymbolContext.GetSizeOfAddress: Integer;
begin
result := FSizeOfAddress;
end;
constructor TFpSymbolContext.Create(ALocationContext: TFpDbgLocationContext;
AFpSymbolInfo: TFpSymbolInfo);
begin
inherited create(ALocationContext);
FFpSymbolInfo:=AFpSymbolInfo;
end;
function TFpSymbolContext.FindSymbol(const AName: String;
const OnlyUnitName: String): TFpValue;
var
i: integer;
val: TFpDbgMemLocation;
begin
i := FFpSymbolInfo.FSymbolList.IndexOf(AName);
if i > -1 then
begin
val := Default(TFpDbgMemLocation);
val.Address:=FFpSymbolInfo.FSymbolList.DataPtr[i]^.Addr;
val.MType:=mlfTargetMem;
result := TFpValueConstAddress.Create(val);
end
else
result := nil;
end;
{ TFpSymbolInfo }
constructor TFpSymbolInfo.Create(ALoaderList: TDbgImageLoaderList;
AMemManager: TFpDbgMemManager);
var
i: Integer;
begin
inherited Create(ALoaderList, AMemManager);
FSymbolList := TfpSymbolList.Create;
for i := 0 to ALoaderList.Count-1 do
ALoaderList[i].ParseSymbolTable(FSymbolList);
FTargetInfo := ALoaderList.TargetInfo;
if FSymbolList.Count > 0 then
SetHasInfo;
end;
constructor TFpSymbolInfo.Create(ALoaderList: TDbgImageLoaderList;
AMemManager: TFpDbgMemManager; ALibName: String);
begin
FLibName := ALibName;
Create(ALoaderList, AMemManager);
end;
destructor TFpSymbolInfo.Destroy;
begin
FSymbolList.Free;
inherited Destroy;
end;
function TFpSymbolInfo.FindSymbolScope(ALocationContext: TFpDbgLocationContext;
AAddress: TDbgPtr): TFpDbgSymbolScope;
begin
assert(False, 'TFpSymbolInfo.FindSymbolScope: False');
Result := TFpSymbolContext.Create(ALocationContext, Self);
end;
function TFpSymbolInfo.FindProcSymbol(const AName: String): TFpSymbol;
var
i: integer;
begin
i := FSymbolList.IndexOf(AName);
if i >= 0 then
Result := TFpSymbolTableProc.Create(AName, FSymbolList.DataPtr[i]^.Addr)
else
result := nil;
end;
function TFpSymbolInfo.FindProcSymbol(AnAdress: TDbgPtr): TFpSymbol;
var
CheckRange: Boolean;
i, NearestIdx: integer;
a, NearestAddr: TDBGPtr;
NPreFix: String;
d: PfpLinkerSymbol;
begin
NPreFix := '';
if FLibName <> '' then
NPreFix := FLibName+':';
CheckRange :=
(FSymbolList.HighAddr > FSymbolList.LowAddr) and
(AnAdress >= FSymbolList.LowAddr) and
(AnAdress < FSymbolList.HighAddr);
NearestIdx := -1;
NearestAddr := 0;
Result := nil;
i := FSymbolList.Count - 1;
while i >= 0 do begin
d := FSymbolList.DataPtr[i];
a := d^.Addr;
if (a = AnAdress) then begin
Result := TFpSymbolTableProc.Create(NPreFix + FSymbolList.Keys[i], a);
exit;
end;
if CheckRange and (a <= AnAdress) and (a > NearestAddr) and
( (d^.SectionEnd = 0) or (AnAdress <= d^.SectionEnd) )
then begin
NearestIdx := i;
NearestAddr := a;
end;
dec(i);
end;
if NearestIdx >= 0 then begin
Result := TFpSymbolTableProc.Create(NPreFix + FSymbolList.Keys[NearestIdx], FSymbolList.DataPtr[NearestIdx]^.Addr);
end;
end;
end.
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