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* ti8086nodeutils.InsertMemorySizes: stack segment creation moved to a separate

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method

git-svn-id: trunk@27851 -
This commit is contained in:
nickysn 2014-06-04 13:44:10 +00:00
parent 886159e73a
commit 70732aedbb
1 changed files with 23 additions and 18 deletions
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41
compiler/i8086/n8086util.pas
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@ -32,6 +32,7 @@ interface
type
ti8086nodeutils = class(tnodeutils)
class procedure InsertMemorySizes; override;
class procedure InsertStackSegment;
end;
@ -44,29 +45,33 @@ implementation
class procedure ti8086nodeutils.InsertMemorySizes;
begin
inherited;
if current_settings.x86memorymodel in x86_far_data_models then
InsertStackSegment;
end;
class procedure ti8086nodeutils.InsertStackSegment;
var
stacksizeleft,stackblock: LongInt;
i: Integer;
begin
inherited;
if current_settings.x86memorymodel in x86_far_data_models then
maybe_new_object_file(current_asmdata.asmlists[al_globals]);
new_section(current_asmdata.asmlists[al_globals],sec_stack,'__stack', 16);
current_asmdata.asmlists[al_globals].concat(tai_symbol.Createname_global('___stack', AT_DATA, stacksize));
{ HACK: since tai_datablock's size parameter is aint, which cannot be
larger than 32767 on i8086, but we'd like to support stack size of
up to 64kb, we may need to use several tai_datablocks to reserve
the stack segment }
i:=0;
stacksizeleft:=stacksize;
while stacksizeleft>0 do
begin
maybe_new_object_file(current_asmdata.asmlists[al_globals]);
new_section(current_asmdata.asmlists[al_globals],sec_stack,'__stack', 16);
current_asmdata.asmlists[al_globals].concat(tai_symbol.Createname_global('___stack', AT_DATA, stacksize));
{ HACK: since tai_datablock's size parameter is aint, which cannot be
larger than 32767 on i8086, but we'd like to support stack size of
up to 64kb, we may need to use several tai_datablocks to reserve
the stack segment }
i:=0;
stacksizeleft:=stacksize;
while stacksizeleft>0 do
begin
stackblock:=min(stacksizeleft,high(aint));
current_asmdata.asmlists[al_globals].concat(tai_datablock.Create('___stackblock'+IntToStr(i),stackblock));
dec(stacksizeleft,stackblock);
inc(i);
end;
stackblock:=min(stacksizeleft,high(aint));
current_asmdata.asmlists[al_globals].concat(tai_datablock.Create('___stackblock'+IntToStr(i),stackblock));
dec(stacksizeleft,stackblock);
inc(i);
end;
end;