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101 lines
2.7 KiB
ObjectPascal
101 lines
2.7 KiB
ObjectPascal
{
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This file is part of the Free Pascal run time library.
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Copyright (c) 1999-2008 by the Free Pascal development team
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This file implements dyn. lib calls calls for Unix
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See the file COPYING.FPC, included in this distribution,
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for details about the copyright.
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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.
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**********************************************************************}
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unit dl;
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interface
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const
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{$ifdef BSD} // dlopen is in libc on FreeBSD.
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LibDL = 'c';
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{$else}
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{$ifdef HAIKU}
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LibDL = 'root';
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{$else}
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LibDL = 'dl';
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{$endif}
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{$endif}
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{$if defined(linux) and defined(cpuarm)}
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{ arm-linux seems to require this }
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{$linklib c}
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{$endif}
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RTLD_LAZY = $001;
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RTLD_NOW = $002;
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RTLD_BINDING_MASK = $003;
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RTLD_GLOBAL = $100;
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RTLD_NEXT = pointer(-1);
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{$ifdef LINUX}
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RTLD_DEFAULT = nil;
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{$endif}
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{$ifdef BSD}
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RTLD_DEFAULT = pointer(-2);
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RTLD_MODEMASK = RTLD_BINDING_MASK;
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{$endif}
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type
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Pdl_info = ^dl_info;
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dl_info = record
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dli_fname : Pchar;
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dli_fbase : pointer;
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dli_sname : Pchar;
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dli_saddr : pointer;
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end;
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function dlopen(Name : PChar; Flags : longint) : Pointer; cdecl; external libdl;
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function dlsym(Lib : Pointer; Name : Pchar) : Pointer; cdecl; external Libdl;
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function dlclose(Lib : Pointer) : Longint; cdecl; external libdl;
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function dlerror() : Pchar; cdecl; external libdl;
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{ overloaded for compatibility with hmodule }
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function dlsym(Lib : PtrInt; Name : Pchar) : Pointer; cdecl; external Libdl;
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function dlclose(Lib : PtrInt) : Longint; cdecl; external libdl;
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function dladdr(Lib: pointer; info: Pdl_info): Longint; cdecl; external;
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implementation
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function PosLastSlash(const s : string) : longint;
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var
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i : longint;
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begin
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PosLastSlash:=0;
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for i:=1 to length(s) do
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if s[i]='/' then
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PosLastSlash:=i;
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end;
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function SimpleExtractFilename(const s : string) : string;
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begin
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SimpleExtractFilename:=Copy(s,PosLastSlash(s)+1,Length(s)-PosLastSlash(s));
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end;
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procedure UnixGetModuleByAddr(addr: pointer; var baseaddr: pointer; var filename: openstring);
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var
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dlinfo: dl_info;
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begin
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baseaddr:=nil;
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FillChar(dlinfo, sizeof(dlinfo), 0);
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dladdr(addr, @dlinfo);
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baseaddr:=dlinfo.dli_fbase;
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filename:=String(dlinfo.dli_fname);
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if SimpleExtractFilename(filename)=SimpleExtractFilename(ParamStr(0)) then
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baseaddr:=nil;
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end;
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begin
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UnixGetModuleByAddrHook:=@UnixGetModuleByAddr;
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end.
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