fpc/compiler/ag68kmit.pas
2000-07-13 11:32:24 +00:00

677 lines
26 KiB
ObjectPascal

{
$Id$
Copyright (c) 1998-2000 by Florian Klaempfl
This unit implements an asmoutput class for MIT syntax with
Motorola 68000 (for MIT syntax TEST WITH GAS v1.34)
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.
****************************************************************************
What's to do:
o Verify if this actually work as indirect mode with name of variables
o write lines numbers and file names to output file
o generate debugging informations
}
unit ag68kmit;
interface
uses aasm,assemble;
type
pm68kmitasmlist=^tm68kmitasmlist;
tm68kmitasmlist = object(tasmlist)
procedure WriteTree(p:paasmoutput);virtual;
procedure WriteAsmList;virtual;
end;
implementation
uses
globtype,systems,
dos,globals,cobjects,cpubase,
strings,files,verbose
{$ifdef GDB}
,gdb
{$endif GDB}
;
const
line_length = 70;
var
{$ifdef GDB}
n_line : byte; { different types of source lines }
linecount,
includecount : longint;
funcname : pchar;
stabslastfileinfo : tfileposinfo;
{$endif}
lastsec : tsection; { last section type written }
lastsecidx,
lastfileindex,
lastline : longint;
function double2str(d : double) : string;
var
hs : string;
begin
str(d,hs);
{ replace space with + }
if hs[1]=' ' then
hs[1]:='+';
double2str:=hs;
end;
(* TO SUPPORT SOONER OR LATER!!!
function comp2str(d : bestreal) : string;
type
pdouble = ^double;
var
c : comp;
dd : pdouble;
begin
{$ifdef TP}
c:=d;
{$else}
c:=comp(d);
{$endif}
dd:=pdouble(@c); { this makes a bitwise copy of c into a double }
comp2str:=double2str(dd^);
end; *)
function getreferencestring(const ref : treference) : string;
var
s : string;
begin
s:='';
if ref.isintvalue then
s:='#'+tostr(ref.offset)
else
with ref do
begin
{ symbol and offset }
if (assigned(symbol)) and (offset<>0) then
Begin
s:=s+'('+tostr(offset)+symbol^;
end
else
{ symbol only }
if (assigned(symbol)) and (offset=0) then
Begin
s:=s+'('+symbol^;
end
else
{ offset only }
if (symbol=nil) and (offset<>0) then
Begin
s:=s+'('+tostr(offset);
end
else
{ NOTHING - put zero as offset }
if (symbol=nil) and (offset=0) then
Begin
s:=s+'('+'0';
end
else
InternalError(10004);
if (index<>R_NO) and (base=R_NO) and (direction=dir_none) then
InternalError(10004)
else if (index=R_NO) and (base<>R_NO) and (direction=dir_inc) then
begin
if (scalefactor = 1) or (scalefactor = 0) then
Begin
if offset<>0 then
s:=mit_reg2str[base]+'@+'+s+')'
else
s:=mit_reg2str[base]+'@+';
end
else
InternalError(10002);
end
else if (index=R_NO) and (base<>R_NO) and (direction=dir_dec) then
begin
if (scalefactor = 1) or (scalefactor = 0) then
Begin
if offset<>0 then
s:=mit_reg2str[base]+'@-'+s+')'
else
s:=mit_reg2str[base]+'@-';
end
else
InternalError(10003);
end
else if (index=R_NO) and (base<>R_NO) and (direction=dir_none) then
begin
if (offset=0) and (symbol=nil) then
s:=mit_reg2str[base]+'@'
else
s:=mit_reg2str[base]+'@'+s+')';
end
else if (index<>R_NO) and (base<>R_NO) and (direction=dir_none) then
begin
s:=mit_reg2str[base]+'@'+s+','+mit_reg2str[index]+':L';
if (scalefactor = 1) or (scalefactor = 0) then
s:=s+')'
else
s:=s+':'+tostr(scalefactor)+')';
end
else
if assigned(symbol) then
Begin
s:=symbol^;
if offset<>0 then
s:=s+'+'+tostr(offset);
end
{ this must be a physical address }
else
s:=s+')';
{ else if NOT assigned(symbol) then
InternalError(10004);}
end; { end with }
getreferencestring:=s;
end;
function getopstr(t : byte;o : pointer) : string;
var
hs : string;
i: tregister;
begin
case t of
top_reg : getopstr:=mit_reg2str[tregister(o)];
top_ref : getopstr:=getreferencestring(preference(o)^);
top_reglist: begin
hs:='';
for i:=R_NO to R_FPSR do
begin
if i in tregisterlist(o^) then
hs:=hs+mit_reg2str[i]+'/';
end;
delete(hs,length(hs),1);
getopstr := hs;
end;
top_const : getopstr:='#'+tostr(longint(o));
top_symbol :
{ compare with i386, where a symbol is considered }
{ a constant. }
begin
hs[0]:=chr(strlen(pchar(pcsymbol(o)^.symbol)));
move(pchar(pcsymbol(o)^.symbol)^,hs[1],byte(hs[0]));
{ inc(byte(hs[0]));}
if pcsymbol(o)^.offset>0 then
hs:=hs+'+'+tostr(pcsymbol(o)^.offset)
else if pcsymbol(o)^.offset<0 then
hs:=hs+tostr(pcsymbol(o)^.offset);
getopstr:=hs;
end;
else internalerror(10001);
end;
end;
function getopstr_jmp(t : byte;o : pointer) : string;
var
hs : string;
begin
case t of
top_reg : getopstr_jmp:=mit_reg2str[tregister(o)];
top_ref : getopstr_jmp:=getreferencestring(preference(o)^);
top_const : getopstr_jmp:=tostr(longint(o));
top_symbol : begin
hs[0]:=chr(strlen(pchar(pcsymbol(o)^.symbol)));
move(pchar(pcsymbol(o)^.symbol)^,hs[1],byte(hs[0]));
if pcsymbol(o)^.offset>0 then
hs:=hs+'+'+tostr(pcsymbol(o)^.offset)
else if pcsymbol(o)^.offset<0 then
hs:=hs+tostr(pcsymbol(o)^.offset);
getopstr_jmp:=hs;
end;
else internalerror(10001);
end;
end;
{****************************************************************************
T68kGASASMOUTPUT
****************************************************************************}
const
ait_const2str:array[ait_const_32bit..ait_const_8bit] of string[8]=
(#9'.long'#9,#9'.short'#9,#9'.byte'#9);
ait_section2str : array[tsection] of string[8]=
('','.text','.data','.bss',
'.stab','.stabstr',
'.idata2','.idata4','.idata5','.idata6','.idata7',
'.edata','');
procedure tm68kmitasmlist.WriteTree(p:paasmoutput);
var
hp : pai;
ch : char;
consttyp : tait;
s : string;
pos,l,i : longint;
found : boolean;
{$ifdef GDB}
curr_n : byte;
infile : pinputfile;
funcname : pchar;
linecount : longint;
{$endif GDB}
begin
if not assigned(p) then
exit;
{$ifdef GDB}
funcname:=nil;
linecount:=1;
{$endif GDB}
hp:=pai(p^.first);
while assigned(hp) do
begin
{ write debugger informations }
{$ifdef GDB}
if ((cs_debuginfo in aktmoduleswitches) or
(cs_gdb_lineinfo in aktglobalswitches)) then
begin
if not (hp^.typ in [ait_external,ait_regalloc, ait_regdealloc,ait_stabn,ait_stabs,
ait_label,ait_cut,ait_marker,ait_align,ait_stab_function_name]) then
begin
{ file changed ? (must be before line info) }
if lastfileindex<>hp^.fileinfo.fileindex then
begin
infile:=current_module^.sourcefiles^.get_file(hp^.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);
lastfileindex:=hp^.fileinfo.fileindex;
end;
{ line changed ? }
if (hp^.fileinfo.line<>lastline) and (hp^.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(hp^.fileinfo.line)+','+
target_asm.labelprefix+'l'+tostr(linecount)+' - ');
AsmWritePChar(FuncName);
AsmLn;
inc(linecount);
end
else
AsmWriteLn(#9'.stabd'#9+tostr(n_line)+',0,'+tostr(hp^.fileinfo.line));
lastline:=hp^.fileinfo.line;
end;
end;
end;
{$endif GDB}
case hp^.typ of
ait_external : ; { external is ignored }
ait_comment : Begin
AsmWrite(target_asm.comment);
AsmWritePChar(pai_asm_comment(hp)^.str);
AsmLn;
End;
{$ifdef DREGALLOC}
ait_regalloc : AsmWriteLn(target_asm.comment+'Register '+att_reg2str[pairegalloc(hp)^.reg]+' allocated');
ait_regdealloc : AsmWriteLn(target_asm.comment+'Register '+att_reg2str[pairegalloc(hp)^.reg]+' released');
{$endif DREGALLOC}
ait_align : AsmWriteLn(#9'.align '+tostr(pai_align(hp)^.aligntype));
ait_section : begin
if pai_section(hp)^.sec<>sec_none then
begin
AsmLn;
AsmWrite(ait_section2str[pai_section(hp)^.sec]);
if pai_section(hp)^.idataidx>0 then
AsmWrite('$'+tostr(pai_section(hp)^.idataidx));
AsmLn;
{$ifdef GDB}
case pai_section(hp)^.sec of
sec_code : n_line:=n_textline;
sec_data : n_line:=n_dataline;
sec_bss : n_line:=n_bssline;
end;
{$endif GDB}
end;
LastSec:=pai_section(hp)^.sec;
end;
ait_datablock : begin
{ ------------------------------------------------------- }
{ ----------- ALIGNMENT FOR ANY NON-BYTE VALUE ---------- }
{ ------------- REQUIREMENT FOR 680x0 ------------------- }
{ ------------------------------------------------------- }
if pai_datablock(hp)^.size <> 1 then
begin
if not(cs_littlesize in aktglobalswitches) then
AsmWriteLn(#9#9'.align 4')
else
AsmWriteLn(#9#9'.align 2');
end;
if pai_datablock(hp)^.is_global then
AsmWrite(#9'.comm'#9)
else
AsmWrite(#9'.lcomm'#9);
AsmWriteLn(StrPas(pai_datablock(hp)^.name)+','+tostr(pai_datablock(hp)^.size));
end;
ait_const_32bit, { alignment is required for 16/32 bit data! }
ait_const_16bit: 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_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
AsmWriteLn(#9'.long'#9+StrPas(pchar(pai_const(hp)^.value)));
end;
ait_const_symbol_offset :
Begin
AsmWrite(#9'.long'#9);
AsmWritePChar(pai_const_symbol_offset(hp)^.name);
if pai_const_symbol_offset(hp)^.offset>0 then
AsmWrite('+'+tostr(pai_const_symbol_offset(hp)^.offset))
else if pai_const_symbol_offset(hp)^.offset<0 then
AsmWrite(tostr(pai_const_symbol_offset(hp)^.offset));
AsmLn;
end;
ait_real_64bit : Begin
AsmWriteLn(#9'.double'#9+double2str(pai_double(hp)^.value));
end;
ait_real_32bit : Begin
AsmWriteLn(#9'.single'#9+double2str(pai_single(hp)^.value));
end;
ait_real_extended : Begin
AsmWriteLn(#9'.extend'#9+double2str(pai_extended(hp)^.value));
{ comp type is difficult to write so use double }
end;
{ TO SUPPORT SOONER OR LATER!!!
ait_comp : Begin
AsmWriteLn(#9'.double'#9+comp2str(pai_extended(hp)^.value));
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 assigned(hp^.next) and (pai(hp^.next)^.typ in
[ait_const_32bit,ait_const_16bit,ait_const_8bit,
ait_const_symbol,ait_const_symbol_offset,
ait_real_64bit,ait_real_32bit,ait_string]) then
begin
if not(cs_littlesize in aktglobalswitches) then
AsmWriteLn(#9#9'.align 4')
else
AsmWriteLn(#9#9'.align 2');
end;
if (pai_label(hp)^.l^.is_used) then
AsmWriteLn(lab2str(pai_label(hp)^.l)+':');
end;
ait_labeled_instruction : begin
{ labeled operand }
if pai_labeled(hp)^._op1 = R_NO then
AsmWriteLn(#9+mot_op2str[pai_labeled(hp)^._operator]+#9+lab2str(pai_labeled(hp)^.lab))
else
{ labeled operand with register }
AsmWriteLn(#9+mot_op2str[pai_labeled(hp)^._operator]+#9+
mit_reg2str[pai_labeled(hp)^._op1]+','+lab2str(pai_labeled(hp)^.lab))
end;
ait_symbol : begin
{ ------------------------------------------------------- }
{ ----------- ALIGNMENT FOR ANY NON-BYTE VALUE ---------- }
{ ------------- REQUIREMENT FOR 680x0 ------------------- }
{ ------------------------------------------------------- }
if assigned(hp^.next) and (pai(hp^.next)^.typ in
[ait_const_32bit,ait_const_16bit,ait_const_8bit,
ait_const_symbol,ait_const_symbol_offset,
ait_real_64bit,ait_real_32bit,ait_string]) then
begin
if not(cs_littlesize in aktglobalswitches) then
AsmWriteLn(#9#9'.align 4')
else
AsmWriteLn(#9#9'.align 2');
end;
if pai_symbol(hp)^.is_global then
AsmWriteLn('.globl '+StrPas(pai_symbol(hp)^.name));
AsmWriteLn(StrPas(pai_symbol(hp)^.name)+':');
end;
ait_instruction : begin
{ old versions of GAS don't like PEA.L and LEA.L }
if (pai68k(hp)^._operator in [
A_LEA,A_PEA,A_ABCD,A_BCHG,A_BCLR,A_BSET,A_BTST,
A_EXG,A_NBCD,A_SBCD,A_SWAP,A_TAS,A_SCC,A_SCS,
A_SEQ,A_SGE,A_SGT,A_SHI,A_SLE,A_SLS,A_SLT,A_SMI,
A_SNE,A_SPL,A_ST,A_SVC,A_SVS,A_SF]) then
s:=#9+mot_op2str[pai68k(hp)^._operator]
else
s:=#9+mot_op2str[pai68k(hp)^._operator]+mit_opsize2str[pai68k(hp)^.size];
if pai68k(hp)^.op1t<>top_none then
begin
{ call and jmp need an extra handling }
{ this code is only callded if jmp isn't a labeled instruction }
if pai68k(hp)^._operator in [A_JSR,A_JMP] then
s:=s+#9+getopstr_jmp(pai68k(hp)^.op1t,pai68k(hp)^.op1)
else
if pai68k(hp)^.op1t = top_reglist then
s:=s+#9+getopstr(pai68k(hp)^.op1t,@(pai68k(hp)^.reglist))
else
s:=s+#9+getopstr(pai68k(hp)^.op1t,pai68k(hp)^.op1);
if pai68k(hp)^.op2t<>top_none then
begin
if pai68k(hp)^.op2t = top_reglist then
s:=s+','+getopstr(pai68k(hp)^.op2t,@pai68k(hp)^.reglist)
else
s:=s+','+getopstr(pai68k(hp)^.op2t,pai68k(hp)^.op2);
{ three operands }
if pai68k(hp)^.op3t<>top_none then
begin
if (pai68k(hp)^._operator = A_DIVSL) or
(pai68k(hp)^._operator = A_DIVUL) or
(pai68k(hp)^._operator = A_MULU) or
(pai68k(hp)^._operator = A_MULS) or
(pai68k(hp)^._operator = A_DIVS) or
(pai68k(hp)^._operator = A_DIVU) then
s:=s+':'+getopstr(pai68k(hp)^.op3t,pai68k(hp)^.op3)
else
s:=s+','+getopstr(pai68k(hp)^.op3t,pai68k(hp)^.op3);
end;
end;
end;
AsmWriteLn(s);
end;
{$ifdef GDB}
ait_stabs : begin
AsmWrite(#9'.stabs ');
AsmWritePChar(pai_stabs(hp)^.str);
AsmLn;
end;
ait_stabn : begin
AsmWrite(#9'.stabn ');
AsmWritePChar(pai_stabn(hp)^.str);
AsmLn;
end;
ait_force_line : begin
stabslastfileinfo.line:=0;
end;
ait_stab_function_name : funcname:=pai_stab_function_name(hp)^.str;
{$endif GDB}
ait_cut : begin
{ create only a new file when the last is not empty }
if AsmSize>0 then
begin
AsmClose;
DoAssemble;
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
begin
lastsec:=pai_section(hp^.next)^.sec;
lastsecidx:=pai_section(hp^.next)^.idataidx;
end;
hp:=pai(hp^.next);
end;
if lastsec<>sec_none then
AsmWriteLn(ait_section2str[lastsec,lastsecidx]);
end;
ait_marker : ;
else
internalerror(10000);
end;
hp:=pai(hp^.next);
end;
end;
procedure tm68kmitasmlist.WriteAsmList;
var
p:dirstr;
n:namestr;
e:extstr;
begin
{$ifdef EXTDEBUG}
if assigned(current_module^.mainsource) then
comment(v_info,'Start writing gas-styled assembler output for '+current_module^.mainsource^);
{$endif}
lastline:=0;
lastfileindex:=0;
LastSec:=sec_none;
{$ifdef GDB}
includecount:=0;
n_line:=n_bssline;
{$endif GDB}
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)+'"');
countlabelref:=false;
{ there should be nothing but externals so we don't need to process
WriteTree(externals); }
If (cs_debuginfo in aktmoduleswitches) then
WriteTree(debuglist);
WriteTree(codesegment);
WriteTree(datasegment);
WriteTree(consts);
WriteTree(rttilist);
WriteTree(bsssegment);
Writetree(importssection);
Writetree(exportssection);
Writetree(resourcesection);
countlabelref:=true;
AsmLn;
{$ifdef EXTDEBUG}
if assigned(current_module^.mainsource) then
comment(v_info,'Done writing gas-styled assembler output for '+current_module^.mainsource^);
{$endif EXTDEBUG}
end;
end.
{
$Log$
Revision 1.2 2000-07-13 11:32:31 michael
+ removed logs
}