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* reversed offset calculation for caller side so it works

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correctly for interfaces
This commit is contained in:
peter 2003-11-28 17:24:22 +00:00
parent d1dbdbd82f
commit b26e3c444a
3 changed files with 59 additions and 33 deletions
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65
compiler/i386/cpupara.pas
View File

@ -317,7 +317,15 @@ unit cpupara;
and we save 6 register + 4 selectors }
if po_interrupt in p.procoptions then
inc(parasize,8+6*4+4*2);
{ Assign fields }
{ Offset is calculated like:
sub esp,12
mov [esp+8],para3
mov [esp+4],para2
mov [esp],para1
call function
That means the for pushes the para with the
highest offset (see para3) needs to be pushed first
}
hp:=tparaitem(p.para.first);
while assigned(hp) do
begin
@ -338,39 +346,34 @@ unit cpupara;
hp.paraloc[side]:=paraloc;
hp:=tparaitem(hp.next);
end;
{ Adapt offsets, for right-to-left calling we need to reverse the
offsets for the caller. For left-to-right calling we need to
reverse the offsets in the callee }
if (side=callerside) then
begin
if not(p.proccalloption in pushleftright_pocalls) then
begin
hp:=tparaitem(p.para.first);
while assigned(hp) do
begin
l:=push_size(hp.paratyp,hp.paratype.def,p.proccalloption);
varalign:=used_align(size_2_align(l),paraalign,paraalign);
l:=align(l,varalign);
hp.paraloc[side].reference.offset:=parasize-hp.paraloc[side].reference.offset-l;
hp:=tparaitem(hp.next);
end;
end;
end
else
{ Adapt offsets for left-to-right calling }
if p.proccalloption in pushleftright_pocalls then
begin
hp:=tparaitem(p.para.first);
while assigned(hp) do
begin
if (p.proccalloption in pushleftright_pocalls) then
begin
l:=push_size(hp.paratyp,hp.paratype.def,p.proccalloption);
varalign:=used_align(size_2_align(l),paraalign,paraalign);
l:=align(l,varalign);
hp.paraloc[side].reference.offset:=parasize-hp.paraloc[side].reference.offset-l;
end;
inc(hp.paraloc[side].reference.offset,target_info.first_parm_offset);
l:=push_size(hp.paratyp,hp.paratype.def,p.proccalloption);
varalign:=used_align(size_2_align(l),paraalign,paraalign);
l:=align(l,varalign);
hp.paraloc[side].reference.offset:=parasize-hp.paraloc[side].reference.offset-l;
if side=calleeside then
inc(hp.paraloc[side].reference.offset,target_info.first_parm_offset);
hp:=tparaitem(hp.next);
end;
end
else
begin
{ Only need to adapt the callee side to include the
standard stackframe size }
if side=calleeside then
begin
hp:=tparaitem(p.para.first);
while assigned(hp) do
begin
inc(hp.paraloc[side].reference.offset,target_info.first_parm_offset);
hp:=tparaitem(hp.next);
end;
end;
end;
{ We need to return the size allocated }
result:=parasize;
@ -497,7 +500,11 @@ begin
end.
{
$Log$
Revision 1.44 2003-11-23 17:05:16 peter
Revision 1.45 2003-11-28 17:24:22 peter
* reversed offset calculation for caller side so it works
correctly for interfaces
Revision 1.44 2003/11/23 17:05:16 peter
* register calling is left-right
* parameter ordering
* left-right calling inserts result parameter last

17
compiler/ncal.pas
View File

@ -2363,9 +2363,18 @@ type
case hp.paraitem.paraloc[callerside].loc of
LOC_REFERENCE :
begin
{ Offset is calculated like:
sub esp,12
mov [esp+8],para3
mov [esp+4],para2
mov [esp],para1
call function
That means the for pushes the para with the
highest offset (see para3) needs to be pushed first
}
if (hpcurr.registers32>hp.registers32)
{$ifdef x86}
or (hpcurr.paraitem.paraloc[callerside].reference.offset<hp.paraitem.paraloc[callerside].reference.offset)
or (hpcurr.paraitem.paraloc[callerside].reference.offset>hp.paraitem.paraloc[callerside].reference.offset)
{$endif x86}
then
break;
@ -2685,7 +2694,11 @@ begin
end.
{
$Log$
Revision 1.208 2003-11-23 17:05:15 peter
Revision 1.209 2003-11-28 17:24:22 peter
* reversed offset calculation for caller side so it works
correctly for interfaces
Revision 1.208 2003/11/23 17:05:15 peter
* register calling is left-right
* parameter ordering
* left-right calling inserts result parameter last

10
compiler/nobj.pas
View File

@ -1354,7 +1354,9 @@ implementation
cg.a_op_const_reg(exprasmlist,OP_SUB,locpara.size,ioffset,locpara.register);
LOC_REFERENCE:
begin
reference_reset_base(href,locpara.reference.index,locpara.reference.offset);
{ offset in the wrapper needs to be adjusted for the stored
return address }
reference_reset_base(href,locpara.reference.index,locpara.reference.offset+POINTER_SIZE);
cg.a_op_const_ref(exprasmlist,OP_SUB,locpara.size,ioffset,href);
end
else
@ -1368,7 +1370,11 @@ initialization
end.
{
$Log$
Revision 1.55 2003-10-30 16:23:13 peter
Revision 1.56 2003-11-28 17:24:22 peter
* reversed offset calculation for caller side so it works
correctly for interfaces
Revision 1.55 2003/10/30 16:23:13 peter
* don't search for overloads in parents for constructors
Revision 1.54 2003/10/29 19:48:50 peter