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Generate indirect symbols for global variables and (typed) constants.

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Note: It needs to be checked what adjustments will need to be done for JVM and LLVM

Note 2: The indirect symbols will always be generated even if the target won't use them so that assembler code can be consistent among the targets (e.g. i386-win32 needs them while i386-linux does not)

ptconst.pas, read_typed_const:
  * generate the indirect symbol in a read only data section
ngenutil.pas, tnodeutils:
  * insertbsssym: generate the indirect symbol in a read only data section

git-svn-id: trunk@33279 -
This commit is contained in:
svenbarth 2016-03-18 21:40:11 +00:00
parent 3971ba7898
commit 6722c611cf
2 changed files with 18 additions and 0 deletions
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9
compiler/ngenutil.pas
View File

@ -562,6 +562,8 @@ implementation
class procedure tnodeutils.insertbsssym(list: tasmlist; sym: tstaticvarsym; size: asizeint; varalign: shortint);
var
symind : tasmsymbol;
begin
if sym.globalasmsym then
begin
@ -581,6 +583,13 @@ implementation
end
else
list.concat(Tai_datablock.create(sym.mangledname,size));
{ add the indirect symbol if needed }
new_section(list,sec_rodata,lower(sym.mangledname),const_align(sym.vardef.alignment));
symind:=current_asmdata.DefineAsmSymbol(sym.mangledname,AB_INDIRECT,AT_DATA);
list.concat(Tai_symbol.Create_Global(symind,0));
list.concat(Tai_const.Createname(sym.mangledname,AT_DATA,0));
list.concat(tai_symbol_end.Create(symind));
end;

9
compiler/ptconst.pas
View File

@ -50,6 +50,7 @@ implementation
datalist : tasmlist;
restree,
previnit : tnode;
symind : tasmsymbol;
begin
{ mark the staticvarsym as typedconst }
include(sym.varoptions,vo_is_typed_const);
@ -133,6 +134,14 @@ implementation
{ and pointed data, if any }
current_asmdata.asmlists[al_const].concatlist(datalist);
{ the (empty) lists themselves are freed by tcbuilder }
{ add indirect symbol }
{ ToDo: do we also need this for the else part? }
new_section(list,sec_rodata,lower(sym.mangledname),const_align(sym.vardef.alignment));
symind:=current_asmdata.DefineAsmSymbol(sym.mangledname,AB_INDIRECT,AT_DATA);
list.concat(Tai_symbol.Create_Global(symind,0));
list.concat(Tai_const.Createname(sym.mangledname,AT_DATA,0));
list.concat(tai_symbol_end.Create(symind));
end
else
begin