{
$Id: agatt.pas,v 1.2 2002/09/07 15:25:14 peter Exp $
Copyright (c) 1998-2000 by Florian Klaempfl
This unit implements an abstract assembler write for GNU AT&T
assebler syntax
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
****************************************************************************
}
unit agatt;
interface
uses
globals,systems,{errors,}cobjects,aasm,strings,files,assemble,cpuasm
{$ifdef GDB}
,gdb
{$endif GDB}
,cpubase,globtype
;
type
pattasmlist=^tattasmlist;
tattasmlist=object(tasmlist)
{ convert an operand to a string }
function getopstr(const o:toper) : string;
{ convert a treference to a string }
function getreferencestring(var ref : treference) : string; Virtual;
{ convert a call/jmp operand to a string }
function getopstr_jmp(const o:toper) : string; Virtual;
{ write an ait_instruction }
Procedure WriteInstruction (P : paicpu); virtual;
procedure WriteTree(p:paasmoutput);virtual;
procedure WriteAsmList;virtual;
{$ifdef GDB}
procedure WriteFileLineInfo(var fileinfo : tfileposinfo);
{$endif}
end;
implementation
function tattasmlist.getreferencestring(var ref : treference) : string;
begin
Abstract
End;
function tattasmlist.getopstr_jmp(const o:toper) : string;
Begin
Abstract
end;
Procedure tattasmlist.WriteInstruction (P : paicpu);
Begin
Abstract
End;
function tattasmlist.getopstr(const o:toper) : string;
var
hs : string;
begin
case o.typ of
top_reg :
getopstr:=att_reg2str[o.reg];
top_ref :
getopstr:=getreferencestring(o.ref^);
top_const :
getopstr:='$'+tostr(o.val);
top_symbol :
begin
if assigned(o.sym) then
hs:='$'+o.sym^.name
else
hs:='$';
if o.symofs>0 then
hs:=hs+'+'+tostr(o.symofs)
else
if o.symofs<0 then
hs:=hs+tostr(o.symofs)
else
if not(assigned(o.sym)) then
hs:=hs+'0';
getopstr:=hs;
end;
else
{$ifndef testing}
internalerror(10001);
{$else testing}
begin
writeln('internalerror 10001');
halt(1);
end;
{$endif testing}
end;
end;
{$ifdef GDB}
procedure tattasmlist.WriteFileLineInfo(var fileinfo : tfileposinfo);
var
curr_n : byte;
begin
if not (cs_debuginfo in aktmoduleswitches) then
exit;
{ file changed ? (must be before line info) }
if (fileinfo.fileindex<>0) and
(stabslastfileinfo.fileindex<>fileinfo.fileindex) then
begin
infile:=current_module^.sourcefiles^.get_file(fileinfo.fileindex);
if includecount=0 then
curr_n:=n_sourcefile
else
curr_n:=n_includefile;
if (infile^.path^<>'') then
begin
AsmWriteLn(#9'.stabs "'+lower(BsToSlash(FixPath(infile^.path^,false)))+'",'+
tostr(curr_n)+',0,0,'+'Ltext'+ToStr(IncludeCount));
end;
AsmWriteLn(#9'.stabs "'+lower(FixFileName(infile^.name^))+'",'+
tostr(curr_n)+',0,0,'+'Ltext'+ToStr(IncludeCount));
AsmWriteLn('Ltext'+ToStr(IncludeCount)+':');
inc(includecount);
end;
{ line changed ? }
if (stabslastfileinfo.line<>fileinfo.line) and (fileinfo.line<>0) then
begin
if (n_line=n_textline) and assigned(funcname) and
(target_os.use_function_relative_addresses) then
begin
AsmWriteLn(target_asm.labelprefix+'l'+tostr(linecount)+':');
AsmWrite(#9'.stabn '+tostr(n_line)+',0,'+tostr(fileinfo.line)+','+
target_asm.labelprefix+'l'+tostr(linecount)+' - ');
AsmWritePChar(FuncName);
AsmLn;
inc(linecount);
end
else
AsmWriteLn(#9'.stabd'#9+tostr(n_line)+',0,'+tostr(fileinfo.line));
end;
stabslastfileinfo:=fileinfo;
end;
{$endif GDB}
procedure tattasmlist.WriteTree(p:paasmoutput);
const
allocstr : array[boolean] of string[10]=(' released',' allocated');
type
t64bitarray = array[0..7] of byte;
t32bitarray = array[0..3] of byte;
var
ch : char;
hp : pai;
consttyp : tait;
s : string;
found : boolean;
i,pos,l : longint;
co : comp;
sin : single;
d : double;
e : extended;
op : tasmop;
calljmp,
do_line : boolean;
sep : char;
begin
if not assigned(p) then
exit;
do_line:=(cs_debuginfo in aktmoduleswitches) or (cs_asm_source in aktglobalswitches);
hp:=pai(p^.first);
while assigned(hp) do
begin
aktfilepos:=hp^.fileinfo;
if do_line then
begin
{ I think it is better to write stabs before source line PM }
{$ifdef GDB}
{ write stabs }
if cs_debuginfo in aktmoduleswitches then
begin
if not (hp^.typ in [
ait_label,
ait_regalloc,ait_tempalloc,
ait_stabn,ait_stabs,ait_section,
ait_cut,ait_marker,ait_align,ait_stab_function_name]) then
begin
WriteFileLineInfo(hp^.fileinfo);
end;
end;
{$endif GDB}
{ load infile }
if lastfileinfo.fileindex<>hp^.fileinfo.fileindex then
begin
infile:=current_module^.sourcefiles^.get_file(hp^.fileinfo.fileindex);
{ open only if needed !! }
if (cs_asm_source in aktglobalswitches) then
infile^.open;
{ avoid unnecessary reopens of the same file !! }
lastfileinfo.fileindex:=hp^.fileinfo.fileindex;
{ be sure to change line !! }
lastfileinfo.line:=-1;
end;
{ write source }
if (cs_asm_source in aktglobalswitches) and
not (hp^.typ in [
ait_label,
ait_stabn,ait_stabs,ait_section,
ait_cut,ait_align,ait_stab_function_name]) then
begin
if (infile<>lastinfile) and assigned(lastinfile) then
begin
AsmWriteLn(target_asm.comment+'['+infile^.name^+']');
lastinfile^.close;
end;
if (hp^.fileinfo.line<>lastfileinfo.line) and
(hp^.fileinfo.line<infile^.maxlinebuf) then
begin
if (hp^.fileinfo.line<>0) and
(infile^.linebuf^[hp^.fileinfo.line]>=0) then
AsmWriteLn(target_asm.comment+'['+tostr(hp^.fileinfo.line)+'] '+
fixline(infile^.GetLineStr(hp^.fileinfo.line)));
{ set it to a negative value !
to make that is has been read already !! PM }
infile^.linebuf^[hp^.fileinfo.line]:=-infile^.linebuf^[hp^.fileinfo.line]-1;
end;
lastfileinfo:=hp^.fileinfo;
lastinfile:=infile;
end;
end;
case hp^.typ of
ait_comment :
Begin
AsmWrite(target_asm.comment);
AsmWritePChar(pai_asm_comment(hp)^.str);
AsmLn;
End;
ait_regalloc :
begin
if (cs_asm_regalloc in aktglobalswitches) then
AsmWriteLn(target_asm.comment+'Register '+att_reg2str[pairegalloc(hp)^.reg]+
allocstr[pairegalloc(hp)^.allocation]);
end;
ait_tempalloc :
begin
if (cs_asm_tempalloc in aktglobalswitches) then
AsmWriteLn(target_asm.comment+'Temp '+tostr(paitempalloc(hp)^.temppos)+','+
tostr(paitempalloc(hp)^.tempsize)+allocstr[paitempalloc(hp)^.allocation]);
end;
ait_align :
begin
AsmWrite(#9'.balign '+tostr(pai_align(hp)^.aligntype));
if pai_align(hp)^.use_op then
AsmWrite(','+tostr(pai_align(hp)^.fillop));
AsmLn;
end;
ait_section :
begin
if pai_section(hp)^.sec<>sec_none then
begin
AsmLn;
AsmWriteLn(ait_section2str(pai_section(hp)^.sec));
{$ifdef GDB}
lastfileinfo.line:=-1;
{$endif GDB}
end;
end;
ait_datablock :
begin
if pai_datablock(hp)^.is_global then
AsmWrite(#9'.comm'#9)
else
AsmWrite(#9'.lcomm'#9);
AsmWrite(pai_datablock(hp)^.sym^.name);
AsmWriteLn(','+tostr(pai_datablock(hp)^.size));
end;
ait_const_32bit,
ait_const_16bit,
ait_const_8bit :
begin
AsmWrite(ait_const2str[hp^.typ]+tostr(pai_const(hp)^.value));
consttyp:=hp^.typ;
l:=0;
repeat
found:=(not (Pai(hp^.next)=nil)) and (Pai(hp^.next)^.typ=consttyp);
if found then
begin
hp:=Pai(hp^.next);
s:=','+tostr(pai_const(hp)^.value);
AsmWrite(s);
inc(l,length(s));
end;
until (not found) or (l>line_length);
AsmLn;
end;
ait_const_symbol :
begin
AsmWrite(#9'.long'#9+pai_const_symbol(hp)^.sym^.name);
if pai_const_symbol(hp)^.offset>0 then
AsmWrite('+'+tostr(pai_const_symbol(hp)^.offset))
else if pai_const_symbol(hp)^.offset<0 then
AsmWrite(tostr(pai_const_symbol(hp)^.offset));
AsmLn;
end;
ait_const_rva :
AsmWriteLn(#9'.rva'#9+pai_const_symbol(hp)^.sym^.name);
ait_real_64bit :
begin
if do_line then
AsmWriteLn(target_asm.comment+double2str(pai_real_64bit(hp)^.value));
d:=pai_real_64bit(hp)^.value;
AsmWrite(#9'.byte'#9);
for i:=0 to 7 do
begin
if i<>0 then
AsmWrite(',');
AsmWrite(tostr(t64bitarray(d)[i]));
end;
AsmLn;
end;
ait_real_32bit :
begin
if do_line then
AsmWriteLn(target_asm.comment+single2str(pai_real_32bit(hp)^.value));
sin:=pai_real_32bit(hp)^.value;
AsmWrite(#9'.byte'#9);
for i:=0 to 3 do
begin
if i<>0 then
AsmWrite(',');
AsmWrite(tostr(t32bitarray(sin)[i]));
end;
AsmLn;
end;
ait_comp_64bit :
begin
if do_line then
AsmWriteLn(target_asm.comment+comp2str(pai_comp_64bit(hp)^.value));
AsmWrite(#9'.byte'#9);
{$ifdef FPC}
co:=comp(pai_comp_64bit(hp)^.value);
{$else}
co:=pai_comp_64bit(hp)^.value;
{$endif}
for i:=0 to 7 do
begin
if i<>0 then
AsmWrite(',');
AsmWrite(tostr(t64bitarray(co)[i]));
end;
AsmLn;
end;
ait_direct :
begin
AsmWritePChar(pai_direct(hp)^.str);
AsmLn;
{$IfDef GDB}
if strpos(pai_direct(hp)^.str,'.data')<>nil then
n_line:=n_dataline
else if strpos(pai_direct(hp)^.str,'.text')<>nil then
n_line:=n_textline
else if strpos(pai_direct(hp)^.str,'.bss')<>nil then
n_line:=n_bssline;
{$endif GDB}
end;
ait_string :
begin
pos:=0;
for i:=1 to pai_string(hp)^.len do
begin
if pos=0 then
begin
AsmWrite(#9'.ascii'#9'"');
pos:=20;
end;
ch:=pai_string(hp)^.str[i-1];
case ch of
#0, {This can't be done by range, because a bug in FPC}
#1..#31,
#128..#255 : s:='\'+tostr(ord(ch) shr 6)+tostr((ord(ch) and 63) shr 3)+tostr(ord(ch) and 7);
'"' : s:='\"';
'\' : s:='\\';
else
s:=ch;
end;
AsmWrite(s);
inc(pos,length(s));
if (pos>line_length) or (i=pai_string(hp)^.len) then
begin
AsmWriteLn('"');
pos:=0;
end;
end;
end;
ait_label :
begin
if (pai_label(hp)^.l^.is_used) then
begin
if pai_label(hp)^.l^.typ=AS_GLOBAL then
AsmWriteLn('.globl'#9+pai_label(hp)^.l^.name);
AsmWriteLn(pai_label(hp)^.l^.name+':');
end;
end;
ait_symbol :
begin
if pai_symbol(hp)^.is_global then
AsmWriteLn('.globl'#9+pai_symbol(hp)^.sym^.name);
if target_info.target=target_i386_linux then
begin
AsmWrite(#9'.type'#9+pai_symbol(hp)^.sym^.name);
if assigned(pai(hp^.next)) and
(pai(hp^.next)^.typ in [ait_const_symbol,ait_const_rva,
ait_const_32bit,ait_const_16bit,ait_const_8bit,ait_datablock,
ait_real_32bit,ait_real_64bit,ait_real_80bit,ait_comp_64bit]) then
AsmWriteLn(',@object')
else
AsmWriteLn(',@function');
if pai_symbol(hp)^.sym^.size>0 then
AsmWriteLn(#9'.size'#9+pai_symbol(hp)^.sym^.name+', '+tostr(pai_symbol(hp)^.sym^.size));
end;
AsmWriteLn(pai_symbol(hp)^.sym^.name+':');
end;
ait_symbol_end :
begin
if target_info.target=target_i386_linux then
begin
s:=target_asm.labelprefix+'e'+tostr(symendcount);
inc(symendcount);
AsmWriteLn(s+':');
AsmWriteLn(#9'.size'#9+pai_symbol(hp)^.sym^.name+', '+s+' - '+pai_symbol(hp)^.sym^.name);
end;
end;
ait_instruction : WriteInstruction(Hp);
{$ifdef GDB}
ait_stabs :
begin
AsmWrite(#9'.stabs ');
AsmWritePChar(pai_stabs(hp)^.str);
AsmLn;
end;
ait_stabn :
begin
AsmWrite(#9'.stabn ');
AsmWritePChar(pai_stabn(hp)^.str);
AsmLn;
end;
ait_force_line :
stabslastfileinfo.line:=0;
ait_stab_function_name:
funcname:=pai_stab_function_name(hp)^.str;
{$endif GDB}
ait_cut :
begin
if SmartAsm then
begin
{ only reset buffer if nothing has changed }
if AsmSize=AsmStartSize then
AsmClear
else
begin
AsmClose;
DoAssemble;
if pai_cut(hp)^.EndName then
IsEndFile:=true;
AsmCreate;
end;
{ avoid empty files }
while assigned(hp^.next) and (pai(hp^.next)^.typ in [ait_cut,ait_section,ait_comment]) do
begin
if pai(hp^.next)^.typ=ait_section then
lastsec:=pai_section(hp^.next)^.sec;
hp:=pai(hp^.next);
end;
{$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: agatt.pas,v $
Revision 1.2 2002/09/07 15:25:14 peter
* old logs removed and tabs fixed
}
syntax highlighted by Code2HTML, v. 0.9.1