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{
Copyright (c) 1998-2002,2015 by Florian Klaempfl
Generate x86 assembler for in load nodes
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 nx86ld;
{$i fpcdefs.inc}
interface
uses
globtype,
symtype,symsym,
node,nld,ncgld;
type
tx86loadnode = class(tcgloadnode)
protected
procedure generate_threadvar_access(gvs: tstaticvarsym); override;
end;
implementation
uses
globals,
cutils,verbose,systems,
aasmbase,aasmtai,aasmdata,aasmcpu,
cgutils,cgobj,
symconst,symdef,symtable,
cgbase,cpubase,parabase,paramgr,
procinfo;
{*****************************************************************************
TX86LOADNODE
*****************************************************************************}
procedure tx86loadnode.generate_threadvar_access(gvs: tstaticvarsym);
var
paraloc1 : tcgpara;
pd: tprocdef;
href: treference;
hregister : tregister;
handled: boolean;
begin
handled:=false;
if (tf_section_threadvars in target_info.flags) then
begin
if target_info.system in [system_i386_win32,system_x86_64_win64] then
begin
paraloc1.init;
pd:=search_system_proc('fpc_tls_add');
paramanager.getcgtempparaloc(current_asmdata.CurrAsmList,pd,1,paraloc1);
if not(vo_is_weak_external in gvs.varoptions) then
reference_reset_symbol(href,current_asmdata.RefAsmSymbol(gvs.mangledname,AT_DATA,use_indirect_symbol(gvs)),0,sizeof(pint),[])
else
reference_reset_symbol(href,current_asmdata.WeakRefAsmSymbol(gvs.mangledname,AT_DATA),0,sizeof(pint),[]);
cg.a_loadaddr_ref_cgpara(current_asmdata.CurrAsmList,href,paraloc1);
paramanager.freecgpara(current_asmdata.CurrAsmList,paraloc1);
paraloc1.done;
cg.g_call(current_asmdata.CurrAsmList,'FPC_TLS_ADD');
cg.ungetcpuregister(current_asmdata.CurrAsmList,NR_FUNCTION_RESULT_REG);
hregister:=cg.getaddressregister(current_asmdata.CurrAsmList);
cg.a_load_reg_reg(current_asmdata.CurrAsmList,OS_ADDR,OS_ADDR,NR_FUNCTION_RESULT_REG,hregister);
location.reference.base:=hregister;
handled:=true;
end;
end;
if not handled then
inherited;
if (tf_section_threadvars in target_info.flags) then
begin
{$ifdef i386}
case target_info.system of
system_i386_linux,system_i386_android:
begin
case current_settings.tlsmodel of
tlsm_local_exec:
begin
location.reference.segment:=NR_GS;
location.reference.refaddr:=addr_ntpoff;
end;
tlsm_global_dynamic:
begin
include(current_procinfo.flags,pi_needs_got);
reference_reset(href,0,[]);
location.reference.index:=current_procinfo.got;
location.reference.scalefactor:=1;
location.reference.refaddr:=addr_tlsgd;
cg.getcpuregister(current_asmdata.CurrAsmList,NR_EAX);
current_asmdata.CurrAsmList.concat(taicpu.op_ref_reg(A_LEA,S_L,location.reference,NR_EAX));
cg.g_call(current_asmdata.CurrAsmList,'___tls_get_addr');
cg.ungetcpuregister(current_asmdata.CurrAsmList,NR_EAX);
hregister:=cg.getaddressregister(current_asmdata.CurrAsmList);
cg.a_load_reg_reg(current_asmdata.CurrAsmList,OS_ADDR,OS_ADDR,NR_EAX,hregister);
reference_reset(location.reference,location.reference.alignment,location.reference.volatility);
location.reference.base:=hregister;
end;
else
Internalerror(2018110401);
end;
end;
else
;
end;
{$endif i386}
{$ifdef x86_64}
case target_info.system of
system_x86_64_linux:
begin
case current_settings.tlsmodel of
tlsm_local_exec:
begin
location.reference.segment:=NR_FS;
location.reference.refaddr:=addr_tpoff;
end;
tlsm_global_dynamic:
begin
current_asmdata.CurrAsmList.concat(tai_const.Create_8bit($66));
reference_reset(href,0,[]);
location.reference.base:=NR_RIP;
location.reference.scalefactor:=1;
location.reference.refaddr:=addr_tlsgd;
cg.getcpuregister(current_asmdata.CurrAsmList,NR_RDI);
current_asmdata.CurrAsmList.concat(taicpu.op_ref_reg(A_LEA,S_Q,location.reference,NR_RDI));
current_asmdata.CurrAsmList.concat(tai_const.Create_8bit($66));
current_asmdata.CurrAsmList.concat(tai_const.Create_8bit($66));
current_asmdata.CurrAsmList.concat(tai_const.Create_8bit($48));
cg.g_call(current_asmdata.CurrAsmList,'__tls_get_addr');
cg.ungetcpuregister(current_asmdata.CurrAsmList,NR_RDI);
cg.ungetcpuregister(current_asmdata.CurrAsmList,NR_EAX);
hregister:=cg.getaddressregister(current_asmdata.CurrAsmList);
cg.a_load_reg_reg(current_asmdata.CurrAsmList,OS_ADDR,OS_ADDR,NR_RAX,hregister);
reference_reset(location.reference,location.reference.alignment,location.reference.volatility);
location.reference.base:=hregister;
end;
else
Internalerror(2019012002);
end;
end;
else
;
end;
{$endif x86_64}
end;
end;
begin
cloadnode:=tx86loadnode;
end.
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