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627 lines
20 KiB
ObjectPascal
627 lines
20 KiB
ObjectPascal
{
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$Id$
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Copyright (c) 1998-2000 by Florian Klaempfl
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This unit implements an abstract assembler write for GNU AT&T
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assebler syntax
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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 agatt;
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interface
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uses
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globals,systems,{errors,}cobjects,aasm,strings,files,assemble,cpuasm
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{$ifdef GDB}
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,gdb
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{$endif GDB}
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,cpubase,globtype
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;
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type
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pattasmlist=^tattasmlist;
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tattasmlist=object(tasmlist)
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{ convert an operand to a string }
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function getopstr(const o:toper) : string;
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{ convert a treference to a string }
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function getreferencestring(var ref : treference) : string; Virtual;
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{ convert a call/jmp operand to a string }
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function getopstr_jmp(const o:toper) : string; Virtual;
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{ write an ait_instruction }
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Procedure WriteInstruction (P : paicpu); virtual;
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procedure WriteTree(p:paasmoutput);virtual;
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procedure WriteAsmList;virtual;
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{$ifdef GDB}
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procedure WriteFileLineInfo(var fileinfo : tfileposinfo);
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{$endif}
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end;
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implementation
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function tattasmlist.getreferencestring(var ref : treference) : string;
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begin
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Abstract
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End;
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function tattasmlist.getopstr_jmp(const o:toper) : string;
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Begin
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Abstract
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end;
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Procedure tattasmlist.WriteInstruction (P : paicpu);
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Begin
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Abstract
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End;
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function tattasmlist.getopstr(const o:toper) : string;
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var
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hs : string;
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begin
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case o.typ of
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top_reg :
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getopstr:=att_reg2str[o.reg];
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top_ref :
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getopstr:=getreferencestring(o.ref^);
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top_const :
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getopstr:='$'+tostr(o.val);
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top_symbol :
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begin
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if assigned(o.sym) then
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hs:='$'+o.sym^.name
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else
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hs:='$';
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if o.symofs>0 then
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hs:=hs+'+'+tostr(o.symofs)
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else
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if o.symofs<0 then
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hs:=hs+tostr(o.symofs)
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else
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if not(assigned(o.sym)) then
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hs:=hs+'0';
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getopstr:=hs;
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end;
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else
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{$ifndef testing}
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internalerror(10001);
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{$else testing}
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begin
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writeln('internalerror 10001');
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halt(1);
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end;
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{$endif testing}
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end;
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end;
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{$ifdef GDB}
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procedure tattasmlist.WriteFileLineInfo(var fileinfo : tfileposinfo);
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var
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curr_n : byte;
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begin
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if not (cs_debuginfo in aktmoduleswitches) then
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exit;
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{ file changed ? (must be before line info) }
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if (fileinfo.fileindex<>0) and
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(stabslastfileinfo.fileindex<>fileinfo.fileindex) then
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begin
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infile:=current_module^.sourcefiles^.get_file(fileinfo.fileindex);
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if includecount=0 then
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curr_n:=n_sourcefile
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else
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curr_n:=n_includefile;
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if (infile^.path^<>'') then
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begin
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AsmWriteLn(#9'.stabs "'+lower(BsToSlash(FixPath(infile^.path^,false)))+'",'+
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tostr(curr_n)+',0,0,'+'Ltext'+ToStr(IncludeCount));
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end;
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AsmWriteLn(#9'.stabs "'+lower(FixFileName(infile^.name^))+'",'+
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tostr(curr_n)+',0,0,'+'Ltext'+ToStr(IncludeCount));
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AsmWriteLn('Ltext'+ToStr(IncludeCount)+':');
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inc(includecount);
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end;
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{ line changed ? }
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if (stabslastfileinfo.line<>fileinfo.line) and (fileinfo.line<>0) then
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begin
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if (n_line=n_textline) and assigned(funcname) and
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(target_os.use_function_relative_addresses) then
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begin
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AsmWriteLn(target_asm.labelprefix+'l'+tostr(linecount)+':');
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AsmWrite(#9'.stabn '+tostr(n_line)+',0,'+tostr(fileinfo.line)+','+
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target_asm.labelprefix+'l'+tostr(linecount)+' - ');
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AsmWritePChar(FuncName);
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AsmLn;
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inc(linecount);
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end
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else
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AsmWriteLn(#9'.stabd'#9+tostr(n_line)+',0,'+tostr(fileinfo.line));
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end;
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stabslastfileinfo:=fileinfo;
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end;
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{$endif GDB}
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procedure tattasmlist.WriteTree(p:paasmoutput);
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const
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allocstr : array[boolean] of string[10]=(' released',' allocated');
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type
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t64bitarray = array[0..7] of byte;
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t32bitarray = array[0..3] of byte;
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var
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ch : char;
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hp : pai;
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consttyp : tait;
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s : string;
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found : boolean;
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i,pos,l : longint;
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co : comp;
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sin : single;
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d : double;
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e : extended;
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op : tasmop;
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calljmp,
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do_line : boolean;
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sep : char;
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begin
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if not assigned(p) then
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exit;
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do_line:=(cs_debuginfo in aktmoduleswitches) or (cs_asm_source in aktglobalswitches);
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hp:=pai(p^.first);
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while assigned(hp) do
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begin
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aktfilepos:=hp^.fileinfo;
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if do_line then
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begin
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{ I think it is better to write stabs before source line PM }
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{$ifdef GDB}
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{ write stabs }
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if cs_debuginfo in aktmoduleswitches then
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begin
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if not (hp^.typ in [
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ait_label,
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ait_regalloc,ait_tempalloc,
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ait_stabn,ait_stabs,ait_section,
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ait_cut,ait_marker,ait_align,ait_stab_function_name]) then
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begin
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WriteFileLineInfo(hp^.fileinfo);
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end;
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end;
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{$endif GDB}
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{ load infile }
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if lastfileinfo.fileindex<>hp^.fileinfo.fileindex then
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begin
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infile:=current_module^.sourcefiles^.get_file(hp^.fileinfo.fileindex);
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{ open only if needed !! }
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if (cs_asm_source in aktglobalswitches) then
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infile^.open;
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{ avoid unnecessary reopens of the same file !! }
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lastfileinfo.fileindex:=hp^.fileinfo.fileindex;
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{ be sure to change line !! }
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lastfileinfo.line:=-1;
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end;
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{ write source }
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if (cs_asm_source in aktglobalswitches) and
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not (hp^.typ in [
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ait_label,
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ait_stabn,ait_stabs,ait_section,
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ait_cut,ait_align,ait_stab_function_name]) then
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begin
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if (infile<>lastinfile) and assigned(lastinfile) then
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begin
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AsmWriteLn(target_asm.comment+'['+infile^.name^+']');
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lastinfile^.close;
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end;
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if (hp^.fileinfo.line<>lastfileinfo.line) and
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(hp^.fileinfo.line<infile^.maxlinebuf) then
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begin
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if (hp^.fileinfo.line<>0) and
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(infile^.linebuf^[hp^.fileinfo.line]>=0) then
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AsmWriteLn(target_asm.comment+'['+tostr(hp^.fileinfo.line)+'] '+
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fixline(infile^.GetLineStr(hp^.fileinfo.line)));
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{ set it to a negative value !
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to make that is has been read already !! PM }
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infile^.linebuf^[hp^.fileinfo.line]:=-infile^.linebuf^[hp^.fileinfo.line]-1;
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end;
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lastfileinfo:=hp^.fileinfo;
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lastinfile:=infile;
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end;
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end;
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case hp^.typ of
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ait_comment :
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Begin
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AsmWrite(target_asm.comment);
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AsmWritePChar(pai_asm_comment(hp)^.str);
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AsmLn;
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End;
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ait_regalloc :
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begin
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if (cs_asm_regalloc in aktglobalswitches) then
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AsmWriteLn(target_asm.comment+'Register '+att_reg2str[pairegalloc(hp)^.reg]+
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allocstr[pairegalloc(hp)^.allocation]);
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end;
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ait_tempalloc :
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begin
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if (cs_asm_tempalloc in aktglobalswitches) then
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AsmWriteLn(target_asm.comment+'Temp '+tostr(paitempalloc(hp)^.temppos)+','+
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tostr(paitempalloc(hp)^.tempsize)+allocstr[paitempalloc(hp)^.allocation]);
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end;
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ait_align :
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begin
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AsmWrite(#9'.balign '+tostr(pai_align(hp)^.aligntype));
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if pai_align(hp)^.use_op then
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AsmWrite(','+tostr(pai_align(hp)^.fillop));
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AsmLn;
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end;
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ait_section :
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begin
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if pai_section(hp)^.sec<>sec_none then
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begin
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AsmLn;
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AsmWriteLn(ait_section2str(pai_section(hp)^.sec));
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{$ifdef GDB}
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lastfileinfo.line:=-1;
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{$endif GDB}
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end;
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end;
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ait_datablock :
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begin
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if pai_datablock(hp)^.is_global then
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AsmWrite(#9'.comm'#9)
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else
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AsmWrite(#9'.lcomm'#9);
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AsmWrite(pai_datablock(hp)^.sym^.name);
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AsmWriteLn(','+tostr(pai_datablock(hp)^.size));
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end;
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ait_const_32bit,
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ait_const_16bit,
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ait_const_8bit :
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begin
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AsmWrite(ait_const2str[hp^.typ]+tostr(pai_const(hp)^.value));
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consttyp:=hp^.typ;
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l:=0;
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repeat
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found:=(not (Pai(hp^.next)=nil)) and (Pai(hp^.next)^.typ=consttyp);
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if found then
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begin
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hp:=Pai(hp^.next);
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s:=','+tostr(pai_const(hp)^.value);
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AsmWrite(s);
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inc(l,length(s));
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end;
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until (not found) or (l>line_length);
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AsmLn;
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end;
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ait_const_symbol :
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begin
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AsmWrite(#9'.long'#9+pai_const_symbol(hp)^.sym^.name);
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if pai_const_symbol(hp)^.offset>0 then
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AsmWrite('+'+tostr(pai_const_symbol(hp)^.offset))
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else if pai_const_symbol(hp)^.offset<0 then
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AsmWrite(tostr(pai_const_symbol(hp)^.offset));
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AsmLn;
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end;
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ait_const_rva :
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AsmWriteLn(#9'.rva'#9+pai_const_symbol(hp)^.sym^.name);
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ait_real_64bit :
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begin
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if do_line then
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AsmWriteLn(target_asm.comment+double2str(pai_real_64bit(hp)^.value));
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d:=pai_real_64bit(hp)^.value;
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AsmWrite(#9'.byte'#9);
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for i:=0 to 7 do
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begin
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if i<>0 then
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AsmWrite(',');
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AsmWrite(tostr(t64bitarray(d)[i]));
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end;
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AsmLn;
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end;
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ait_real_32bit :
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begin
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if do_line then
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AsmWriteLn(target_asm.comment+single2str(pai_real_32bit(hp)^.value));
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sin:=pai_real_32bit(hp)^.value;
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AsmWrite(#9'.byte'#9);
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for i:=0 to 3 do
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begin
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if i<>0 then
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AsmWrite(',');
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AsmWrite(tostr(t32bitarray(sin)[i]));
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end;
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AsmLn;
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end;
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ait_comp_64bit :
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begin
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if do_line then
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AsmWriteLn(target_asm.comment+comp2str(pai_comp_64bit(hp)^.value));
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AsmWrite(#9'.byte'#9);
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{$ifdef FPC}
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co:=comp(pai_comp_64bit(hp)^.value);
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{$else}
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co:=pai_comp_64bit(hp)^.value;
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{$endif}
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for i:=0 to 7 do
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begin
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if i<>0 then
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AsmWrite(',');
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AsmWrite(tostr(t64bitarray(co)[i]));
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end;
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AsmLn;
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end;
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ait_direct :
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begin
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AsmWritePChar(pai_direct(hp)^.str);
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AsmLn;
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{$IfDef GDB}
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if strpos(pai_direct(hp)^.str,'.data')<>nil then
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n_line:=n_dataline
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else if strpos(pai_direct(hp)^.str,'.text')<>nil then
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n_line:=n_textline
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else if strpos(pai_direct(hp)^.str,'.bss')<>nil then
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n_line:=n_bssline;
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{$endif GDB}
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end;
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ait_string :
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begin
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pos:=0;
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for i:=1 to pai_string(hp)^.len do
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begin
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if pos=0 then
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begin
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AsmWrite(#9'.ascii'#9'"');
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pos:=20;
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end;
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ch:=pai_string(hp)^.str[i-1];
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case ch of
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#0, {This can't be done by range, because a bug in FPC}
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#1..#31,
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#128..#255 : s:='\'+tostr(ord(ch) shr 6)+tostr((ord(ch) and 63) shr 3)+tostr(ord(ch) and 7);
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'"' : s:='\"';
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'\' : s:='\\';
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else
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s:=ch;
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end;
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AsmWrite(s);
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inc(pos,length(s));
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if (pos>line_length) or (i=pai_string(hp)^.len) then
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begin
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AsmWriteLn('"');
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pos:=0;
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end;
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end;
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end;
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ait_label :
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begin
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if (pai_label(hp)^.l^.is_used) then
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begin
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if pai_label(hp)^.l^.typ=AS_GLOBAL then
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AsmWriteLn('.globl'#9+pai_label(hp)^.l^.name);
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AsmWriteLn(pai_label(hp)^.l^.name+':');
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end;
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end;
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ait_symbol :
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begin
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if pai_symbol(hp)^.is_global then
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AsmWriteLn('.globl'#9+pai_symbol(hp)^.sym^.name);
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if target_info.target=target_i386_linux then
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begin
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AsmWrite(#9'.type'#9+pai_symbol(hp)^.sym^.name);
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if assigned(pai(hp^.next)) and
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(pai(hp^.next)^.typ in [ait_const_symbol,ait_const_rva,
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ait_const_32bit,ait_const_16bit,ait_const_8bit,ait_datablock,
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ait_real_32bit,ait_real_64bit,ait_real_80bit,ait_comp_64bit]) then
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AsmWriteLn(',@object')
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else
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AsmWriteLn(',@function');
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if pai_symbol(hp)^.sym^.size>0 then
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AsmWriteLn(#9'.size'#9+pai_symbol(hp)^.sym^.name+', '+tostr(pai_symbol(hp)^.sym^.size));
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end;
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AsmWriteLn(pai_symbol(hp)^.sym^.name+':');
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end;
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ait_symbol_end :
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begin
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if target_info.target=target_i386_linux then
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begin
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s:=target_asm.labelprefix+'e'+tostr(symendcount);
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inc(symendcount);
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AsmWriteLn(s+':');
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AsmWriteLn(#9'.size'#9+pai_symbol(hp)^.sym^.name+', '+s+' - '+pai_symbol(hp)^.sym^.name);
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end;
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end;
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ait_instruction : WriteInstruction(Hp);
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{$ifdef GDB}
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ait_stabs :
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begin
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AsmWrite(#9'.stabs ');
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AsmWritePChar(pai_stabs(hp)^.str);
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AsmLn;
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end;
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ait_stabn :
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begin
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AsmWrite(#9'.stabn ');
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AsmWritePChar(pai_stabn(hp)^.str);
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AsmLn;
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end;
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ait_force_line :
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stabslastfileinfo.line:=0;
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ait_stab_function_name:
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funcname:=pai_stab_function_name(hp)^.str;
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{$endif GDB}
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ait_cut :
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begin
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if SmartAsm then
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begin
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{ only reset buffer if nothing has changed }
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if AsmSize=AsmStartSize then
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AsmClear
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else
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begin
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AsmClose;
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DoAssemble;
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if pai_cut(hp)^.EndName then
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IsEndFile:=true;
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AsmCreate;
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end;
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{ avoid empty files }
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while assigned(hp^.next) and (pai(hp^.next)^.typ in [ait_cut,ait_section,ait_comment]) do
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begin
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if pai(hp^.next)^.typ=ait_section then
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|
lastsec:=pai_section(hp^.next)^.sec;
|
|
hp:=pai(hp^.next);
|
|
end;
|
|
{$ifdef GDB}
|
|
{ force write of filename }
|
|
FillChar(stabslastfileinfo,sizeof(stabslastfileinfo),0);
|
|
includecount:=0;
|
|
funcname:=nil;
|
|
WriteFileLineInfo(hp^.fileinfo);
|
|
{$endif GDB}
|
|
if lastsec<>sec_none then
|
|
AsmWriteLn(ait_section2str(lastsec));
|
|
AsmStartSize:=AsmSize;
|
|
end;
|
|
end;
|
|
|
|
ait_marker :
|
|
;
|
|
|
|
else
|
|
{$ifndef testing}
|
|
internalerror(10000);
|
|
{$else testing}
|
|
begin
|
|
writeln('internalerror 10001');
|
|
halt(1);
|
|
end;
|
|
{$endif testing}
|
|
end;
|
|
hp:=pai(hp^.next);
|
|
end;
|
|
end;
|
|
|
|
|
|
procedure tattasmlist.WriteAsmList;
|
|
var
|
|
p:dirstr;
|
|
n:namestr;
|
|
e:extstr;
|
|
{$ifdef GDB}
|
|
fileinfo : tfileposinfo;
|
|
{$endif GDB}
|
|
|
|
begin
|
|
{$ifdef EXTDEBUG}
|
|
if assigned(current_module^.mainsource) then
|
|
Comment(v_info,'Start writing att-styled assembler output for '+current_module^.mainsource^);
|
|
{$endif}
|
|
|
|
LastSec:=sec_none;
|
|
{$ifdef GDB}
|
|
FillChar(stabslastfileinfo,sizeof(stabslastfileinfo),0);
|
|
{$endif GDB}
|
|
FillChar(lastfileinfo,sizeof(lastfileinfo),0);
|
|
LastInfile:=nil;
|
|
|
|
if assigned(current_module^.mainsource) then
|
|
fsplit(current_module^.mainsource^,p,n,e)
|
|
else
|
|
begin
|
|
p:=inputdir;
|
|
n:=inputfile;
|
|
e:=inputextension;
|
|
end;
|
|
{ to get symify to work }
|
|
AsmWriteLn(#9'.file "'+FixFileName(n+e)+'"');
|
|
|
|
{$ifdef GDB}
|
|
n_line:=n_bssline;
|
|
funcname:=nil;
|
|
linecount:=1;
|
|
includecount:=0;
|
|
fileinfo.fileindex:=1;
|
|
fileinfo.line:=1;
|
|
{ Write main file }
|
|
WriteFileLineInfo(fileinfo);
|
|
{$endif GDB}
|
|
AsmStartSize:=AsmSize;
|
|
symendcount:=0;
|
|
|
|
countlabelref:=false;
|
|
If (cs_debuginfo in aktmoduleswitches) then
|
|
WriteTree(debuglist);
|
|
WriteTree(codesegment);
|
|
WriteTree(datasegment);
|
|
WriteTree(consts);
|
|
WriteTree(rttilist);
|
|
Writetree(resourcestringlist);
|
|
WriteTree(bsssegment);
|
|
Writetree(importssection);
|
|
Writetree(exportssection);
|
|
Writetree(resourcesection);
|
|
countlabelref:=true;
|
|
|
|
AsmLn;
|
|
{$ifdef EXTDEBUG}
|
|
if assigned(current_module^.mainsource) then
|
|
comment(v_info,'Done writing att-styled assembler output for '+current_module^.mainsource^);
|
|
{$endif EXTDEBUG}
|
|
end;
|
|
|
|
Procedure tattasmlist.WriteInstruction (P : Pai); virtual;
|
|
|
|
begin
|
|
RunError(255);
|
|
end;
|
|
end.
|
|
{
|
|
$Log$
|
|
Revision 1.3 2004-06-20 08:55:31 florian
|
|
* logs truncated
|
|
|
|
}
|