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elpicpie.d
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elpicpie.d
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/**
* Generate elems for fixed, PIC, and PIE code generation.
*
* Compiler implementation of the
* $(LINK2 http://www.dlang.org, D programming language).
*
* Copyright: Copyright (C) 1985-1998 by Symantec
* Copyright (C) 2000-2020 by The D Language Foundation, All Rights Reserved
* Authors: $(LINK2 http://www.digitalmars.com, Walter Bright)
* License: $(LINK2 http://www.boost.org/LICENSE_1_0.txt, Boost License 1.0)
* Source: $(LINK2 https://github.com/dlang/dmd/blob/master/src/dmd/backend/elpicpie.d, backend/elpicpie.d)
*/
module dmd.backend.elpicpie;
version (SCPP)
{
version = COMPILE;
version = SCPP_HTOD;
}
version (HTOD)
{
version = COMPILE;
version = SCPP_HTOD;
}
version (MARS)
{
version = COMPILE;
}
version (COMPILE)
{
import core.stdc.stdarg;
import core.stdc.stdio;
import core.stdc.stdlib;
import core.stdc.string;
import dmd.backend.cdef;
import dmd.backend.cc;
import dmd.backend.code;
import dmd.backend.code_x86;
import dmd.backend.el;
import dmd.backend.global;
import dmd.backend.obj;
import dmd.backend.oper;
import dmd.backend.rtlsym;
import dmd.backend.ty;
import dmd.backend.type;
version (SCPP_HTOD)
{
import msgs2;
}
extern (C++):
nothrow:
/**************************
* Make an elem out of a symbol.
*/
version (MARS)
{
elem * el_var(Symbol *s)
{
elem *e;
//printf("el_var(s = '%s')\n", s.Sident);
//printf("%x\n", s.Stype.Tty);
static if (TARGET_LINUX || TARGET_OSX || TARGET_FREEBSD || TARGET_OPENBSD || TARGET_DRAGONFLYBSD || TARGET_SOLARIS)
{
if (config.flags3 & CFG3pie &&
s.Stype.Tty & mTYthread)
return el_pievar(s); // Position Independent Executable
if (config.flags3 & CFG3pic &&
!tyfunc(s.ty()))
return el_picvar(s); // Position Independent Code
}
static if (TARGET_LINUX || TARGET_FREEBSD || TARGET_OPENBSD || TARGET_DRAGONFLYBSD || TARGET_SOLARIS)
{
if (config.flags3 & CFG3pic && tyfunc(s.ty()))
{
switch (s.Sclass)
{
case SCcomdat:
case SCcomdef:
case SCglobal:
case SCextern:
el_alloc_localgot();
break;
default:
break;
}
}
}
symbol_debug(s);
type_debug(s.Stype);
e = el_calloc();
e.Eoper = OPvar;
e.EV.Vsym = s;
type_debug(s.Stype);
e.Ety = s.ty();
if (s.Stype.Tty & mTYthread)
{
//printf("thread local %s\n", s.Sident);
static if (TARGET_OSX)
{
}
else static if (TARGET_LINUX || TARGET_FREEBSD || TARGET_OPENBSD || TARGET_DRAGONFLYBSD || TARGET_SOLARIS)
{
/* For 32 bit:
* Generate for var locals:
* MOV reg,GS:[00000000] // add GS: override in back end
* ADD reg, offset s@TLS_LE
* e => *(&s + *(GS:0))
* For var globals:
* MOV reg,GS:[00000000]
* ADD reg, s@TLS_IE
* e => *(s + *(GS:0))
* note different fixup
*****************************************
* For 64 bit:
* Generate for var locals:
* MOV reg,FS:s@TPOFF32
* For var globals:
* MOV RAX,s@GOTTPOFF[RIP]
* MOV reg,FS:[RAX]
*
* For address of locals:
* MOV RAX,FS:[00]
* LEA reg,s@TPOFF32[RAX]
* e => &s + *(FS:0)
* For address of globals:
* MOV reg,FS:[00]
* MOV RAX,s@GOTTPOFF[RIP]
* ADD reg,RAX
* e => s + *(FS:0)
* This leaves us with a problem, as the 'var' version cannot simply have
* its address taken, as what is the address of FS:s ? The (not so efficient)
* solution is to just use the second address form, and * it.
* Turns out that is identical to the 32 bit version, except GS => FS and the
* fixups are different.
* In the future, we should figure out a way to optimize to the 'var' version.
*/
if (I64)
Obj.refGOTsym();
elem *e1 = el_calloc();
e1.EV.Vsym = s;
if (s.Sclass == SCstatic || s.Sclass == SClocstat)
{
e1.Eoper = OPrelconst;
e1.Ety = TYnptr;
}
else
{
e1.Eoper = OPvar;
e1.Ety = TYnptr;
}
elem* e2 = el_una(OPind, TYsize, el_long(TYfgPtr, 0)); // I64: FS:[0000], I32: GS:[0000]
e.Eoper = OPind;
e.EV.E1 = el_bin(OPadd,e1.Ety,e2,e1);
e.EV.E2 = null;
}
else static if (TARGET_WINDOS)
{
/*
Win32:
mov EAX,FS:__tls_array
mov ECX,__tls_index
mov EAX,[ECX*4][EAX]
inc dword ptr _t[EAX]
e => *(&s + *(FS:_tls_array + _tls_index * 4))
If this is an executable app, not a dll, _tls_index
can be assumed to be 0.
Win64:
mov EAX,&s
mov RDX,GS:__tls_array
mov ECX,_tls_index[RIP]
mov RCX,[RCX*8][RDX]
mov EAX,[RCX][RAX]
e => *(&s + *(GS:[80] + _tls_index * 8))
If this is an executable app, not a dll, _tls_index
can be assumed to be 0.
*/
elem* e1,e2,ea;
e1 = el_calloc();
e1.Eoper = OPrelconst;
e1.EV.Vsym = s;
e1.Ety = TYnptr;
if (config.wflags & WFexe)
{
// e => *(&s + *(FS:_tls_array))
e2 = el_var(getRtlsym(RTLSYM_TLS_ARRAY));
}
else
{
e2 = el_bin(OPmul,TYint,el_var(getRtlsym(RTLSYM_TLS_INDEX)),el_long(TYint,REGSIZE));
ea = el_var(getRtlsym(RTLSYM_TLS_ARRAY));
e2 = el_bin(OPadd,ea.Ety,ea,e2);
}
e2 = el_una(OPind,TYsize_t,e2);
e.Eoper = OPind;
e.EV.E1 = el_bin(OPadd,e1.Ety,e1,e2);
e.EV.E2 = null;
}
}
return e;
}
}
version (SCPP_HTOD)
{
elem * el_var(Symbol *s)
{
elem *e;
//printf("el_var(s = '%s')\n", s.Sident);
static if (TARGET_LINUX || TARGET_OSX || TARGET_FREEBSD || TARGET_OPENBSD ||
TARGET_DRAGONFLYBSD || TARGET_SOLARIS)
{
if (config.flags3 & CFG3pic && !tyfunc(s.ty()))
return el_picvar(s);
}
symbol_debug(s);
type_debug(s.Stype);
e = el_calloc();
e.Eoper = OPvar;
e.EV.Vsym = s;
version (SCPP_HTOD)
enum scpp = true;
else
enum scpp = false;
if (scpp && PARSER)
{
type *t = s.Stype;
type_debug(t);
e.ET = t;
t.Tcount++;
static if (TARGET_WINDOS)
{
switch (t.Tty & (mTYimport | mTYthread))
{
case mTYimport:
Obj._import(e);
break;
case mTYthread:
/*
mov EAX,FS:__tls_array
mov ECX,__tls_index
mov EAX,[ECX*4][EAX]
inc dword ptr _t[EAX]
e => *(&s + *(FS:_tls_array + _tls_index * 4))
*/
version (MARS)
assert(0);
else
{
{
elem* e1,e2,ea;
e1 = el_calloc();
e1.Eoper = OPrelconst;
e1.EV.Vsym = s;
e1.ET = newpointer(s.Stype);
e1.ET.Tcount++;
e2 = el_bint(OPmul,tstypes[TYint],el_var(getRtlsym(RTLSYM_TLS_INDEX)),el_longt(tstypes[TYint],4));
ea = el_var(getRtlsym(RTLSYM_TLS_ARRAY));
e2 = el_bint(OPadd,ea.ET,ea,e2);
e2 = el_unat(OPind,tstypes[TYint],e2);
e.Eoper = OPind;
e.EV.E1 = el_bint(OPadd,e1.ET,e1,e2);
e.EV.E2 = null;
}
}
break;
case mTYthread | mTYimport:
version (SCPP_HTOD) { } else assert(0);
tx86err(EM_thread_and_dllimport,s.Sident.ptr); // can't be both thread and import
break;
default:
break;
}
}
}
else
e.Ety = s.ty();
return e;
}
}
/**************************
* Make a pointer to a `Symbol`.
* Params: s = symbol
* Returns: `elem` with address of `s`
*/
elem * el_ptr(Symbol *s)
{
//printf("el_ptr(s = '%s')\n", s.Sident.ptr);
//printf("el_ptr\n");
symbol_debug(s);
type_debug(s.Stype);
const typtr = s.symbol_pointerType();
static if (TARGET_OSX)
{
if (config.flags3 & CFG3pic && tyfunc(s.ty()) && I32)
{
/* Cannot access address of code from code.
* Instead, create a data variable, put the address of the
* code in that data variable, and return the elem for
* that data variable.
*/
Symbol *sd = symboldata(Offset(DATA), typtr);
sd.Sseg = DATA;
Obj.data_start(sd, _tysize[TYnptr], DATA);
Offset(DATA) += Obj.reftoident(DATA, Offset(DATA), s, 0, CFoff);
elem* e = el_picvar(sd);
e.Ety = typtr;
return e;
}
}
static if (TARGET_LINUX || TARGET_OSX || TARGET_FREEBSD || TARGET_OPENBSD ||
TARGET_DRAGONFLYBSD || TARGET_SOLARIS)
{
if (config.flags3 & CFG3pie &&
s.Stype.Tty & mTYthread)
{
elem* e = el_pieptr(s); // Position Independent Executable
e.Ety = typtr;
return e;
}
if (config.flags3 & CFG3pie &&
tyfunc(s.ty()) &&
(s.Sclass == SCglobal || s.Sclass == SCcomdat || s.Sclass == SCcomdef || s.Sclass == SCextern))
{
elem* e = el_calloc();
e.Eoper = OPvar;
e.EV.Vsym = s;
if (I64)
e.Ety = typtr;
else if (I32)
{
e.Ety = TYnptr;
e.Eoper = OPrelconst;
e = el_bin(OPadd, TYnptr, e, el_var(el_alloc_localgot()));
e = el_una(OPind, typtr, e);
}
else
assert(0);
return e;
}
elem *e;
if (config.flags3 & CFG3pic &&
tyfunc(s.ty()))
{
e = el_picvar(s);
}
else
e = el_var(s);
}
else
elem* e = el_var(s);
version (SCPP_HTOD)
{
if (PARSER)
{ type_debug(e.ET);
e = el_unat(OPaddr,type_ptr(e,e.ET),e);
return e;
}
}
if (e.Eoper == OPvar)
{
e.Ety = typtr;
e.Eoper = OPrelconst;
}
else
{
e = el_una(OPaddr, typtr, e);
e = doptelem(e, GOALvalue | GOALflags);
}
return e;
}
/***************************************
* Allocate localgot symbol.
*/
private Symbol *el_alloc_localgot()
{
static if (TARGET_LINUX || TARGET_OSX || TARGET_FREEBSD || TARGET_OPENBSD || TARGET_DRAGONFLYBSD || TARGET_SOLARIS)
{
/* Since localgot is a local variable to each function,
* localgot must be set back to null
* at the start of code gen for each function.
*/
if (I32 && !localgot)
{
//printf("el_alloc_localgot()\n");
char[15] name = void;
__gshared int tmpnum;
sprintf(name.ptr, "_LOCALGOT%d".ptr, tmpnum++);
type *t = type_fake(TYnptr);
/* Make it volatile because we need it for calling functions, but that isn't
* noticed by the data flow analysis. Hence, it may get deleted if we don't
* make it volatile.
*/
type_setcv(&t, mTYvolatile);
localgot = symbol_name(name.ptr, SCauto, t);
symbol_add(localgot);
localgot.Sfl = FLauto;
localgot.Sflags = SFLfree | SFLunambig | GTregcand;
}
return localgot;
}
else
{
return null;
}
}
/**************************
* Make an elem out of a symbol, PIC style.
*/
static if (TARGET_OSX)
{
private elem *el_picvar(Symbol *s)
{
elem *e;
int x;
//printf("el_picvar(s = '%s')", s.Sident); printf(" Sclass = "); WRclass((enum SC) s.Sclass); printf("\n");
//symbol_print(s);
symbol_debug(s);
type_debug(s.Stype);
e = el_calloc();
e.Eoper = OPvar;
e.EV.Vsym = s;
e.Ety = s.ty();
switch (s.Sclass)
{
case SCstatic:
case SClocstat:
x = 0;
goto case_got;
case SCcomdat:
case SCcomdef:
if (0 && I64)
{
x = 0;
goto case_got;
}
goto case SCglobal;
case SCglobal:
case SCextern:
static if (0)
{
if (s.Stype.Tty & mTYthread)
x = 0;
else
x = 1;
}
else
x = 1;
case_got:
{
const op = e.Eoper;
tym_t tym = e.Ety;
e.Eoper = OPrelconst;
e.Ety = TYnptr;
if (I32)
e = el_bin(OPadd, TYnptr, e, el_var(el_alloc_localgot()));
static if (1)
{
if (I32 && s.Stype.Tty & mTYthread)
{
if (!tls_get_addr_sym)
{
/* void *___tls_get_addr(void *ptr);
* Parameter ptr is passed in RDI, matching TYnfunc calling convention.
*/
tls_get_addr_sym = symbol_name("___tls_get_addr",SCglobal,type_fake(TYnfunc));
symbol_keep(tls_get_addr_sym);
}
if (x == 1)
e = el_una(OPind, TYnptr, e);
e = el_bin(OPcallns, TYnptr, el_var(tls_get_addr_sym), e);
if (op == OPvar)
e = el_una(OPind, TYnptr, e);
}
}
if (I64 || !(s.Stype.Tty & mTYthread))
{
switch (op * 2 + x)
{
case OPvar * 2 + 1:
e = el_una(OPind, TYnptr, e);
e = el_una(OPind, TYnptr, e);
break;
case OPvar * 2 + 0:
case OPrelconst * 2 + 1:
e = el_una(OPind, TYnptr, e);
break;
case OPrelconst * 2 + 0:
break;
default:
assert(0);
}
}
static if (1)
{
/**
* A thread local variable is outputted like the following D struct:
*
* struct TLVDescriptor(T)
* {
* extern(C) T* function (TLVDescriptor*) thunk;
* size_t key;
* size_t offset;
* }
*
* To access the value of the variable, the variable is accessed
* like a plain global (__gshared) variable of the type
* TLVDescriptor. The thunk is called and a pointer to the variable
* itself is passed as the argument. The return value of the thunk
* is a pointer to the value of the thread local variable.
*
* module foo;
*
* int bar;
* pragma(mangle, "_D3foo3bari") extern __gshared TLVDescriptor!(int) barTLV;
*
* int a = *barTLV.thunk(&barTLV);
*/
if (I64 && s.Stype.Tty & mTYthread)
{
e = el_una(OPaddr, TYnptr, e);
e = el_bin(OPadd, TYnptr, e, el_long(TYullong, 0));
e = el_una(OPind, TYnptr, e);
e = el_una(OPind, TYnfunc, e);
elem *e2 = el_calloc();
e2.Eoper = OPvar;
e2.EV.Vsym = s;
e2.Ety = s.ty();
e2.Eoper = OPrelconst;
e2.Ety = TYnptr;
e2 = el_una(OPind, TYnptr, e2);
e2 = el_una(OPind, TYnptr, e2);
e2 = el_una(OPaddr, TYnptr, e2);
e2 = doptelem(e2, GOALvalue | GOALflags);
e2 = el_bin(OPadd, TYnptr, e2, el_long(TYullong, 0));
e2 = el_bin(OPcall, TYnptr, e, e2);
e2 = el_una(OPind, TYint, e2);
e = e2;
}
}
e.Ety = tym;
break;
}
default:
break;
}
return e;
}
private elem *el_pievar(Symbol *s)
{
assert(0); // option not needed on TARGET_OSX
}
private elem *el_pieptr(Symbol *s)
{
assert(0); // option not needed on TARGET_OSX
}
}
static if (TARGET_LINUX || TARGET_FREEBSD || TARGET_OPENBSD || TARGET_DRAGONFLYBSD || TARGET_SOLARIS)
{
private elem *el_picvar(Symbol *s)
{
elem *e;
int x;
//printf("el_picvar(s = '%s')\n", s.Sident.ptr);
symbol_debug(s);
type_debug(s.Stype);
e = el_calloc();
e.Eoper = OPvar;
e.EV.Vsym = s;
e.Ety = s.ty();
/* For 32 bit PIC:
* CALL __i686.get_pc_thunk.bx@PC32
* ADD EBX,offset _GLOBAL_OFFSET_TABLE_@GOTPC[2]
* Generate for var locals:
* MOV reg,s@GOTOFF[014h][EBX]
* For var globals:
* MOV EAX,s@GOT32[EBX]
* MOV reg,[EAX]
* For TLS var locals and globals:
* LEA EAX,s@TLS_GD[1*EBX+0] // must use SIB addressing
* CALL ___tls_get_addr@PLT32
* MOV reg,[EAX]
*****************************************
* Generate for var locals:
* MOV reg,s@PC32[RIP]
* For var globals:
* MOV RAX,s@GOTPCREL[RIP]
* MOV reg,[RAX]
* For TLS var locals and globals:
* 0x66
* LEA DI,s@TLSGD[RIP]
* 0x66
* 0x66
* 0x48 (REX | REX_W)
* CALL __tls_get_addr@PLT32
* MOV reg,[RAX]
*/
if (I64)
{
switch (s.Sclass)
{
case SCstatic:
case SClocstat:
x = 0;
goto case_got64;
case SCglobal:
if (config.flags3 & CFG3pie)
x = 0;
else
x = 1;
goto case_got64;
case SCcomdat:
case SCcomdef:
case SCextern:
x = 1;
goto case_got64;
case_got64:
{
Obj.refGOTsym();
const op = e.Eoper;
tym_t tym = e.Ety;
e.Ety = TYnptr;
if (s.Stype.Tty & mTYthread)
{
/* Add "volatile" to prevent e from being common subexpressioned.
* This is so we can preserve the magic sequence of instructions
* that the gnu linker patches:
* lea EDI,x@tlsgd[RIP], call __tls_get_addr@plt
* =>
* mov EAX,gs[0], sub EAX,x@tpoff
*/
e.Eoper = OPrelconst;
e.Ety |= mTYvolatile;
if (!tls_get_addr_sym)
{
/* void *__tls_get_addr(void *ptr);
* Parameter ptr is passed in RDI, matching TYnfunc calling convention.
*/
tls_get_addr_sym = symbol_name("__tls_get_addr",SCglobal,type_fake(TYnfunc));
symbol_keep(tls_get_addr_sym);
}
e = el_bin(OPcall, TYnptr, el_var(tls_get_addr_sym), e);
}
switch (op * 2 + x)
{
case OPvar * 2 + 1:
e = el_una(OPind, TYnptr, e);
break;
case OPvar * 2 + 0:
case OPrelconst * 2 + 1:
break;
case OPrelconst * 2 + 0:
e = el_una(OPaddr, TYnptr, e);
break;
default:
assert(0);
}
e.Ety = tym;
break;
}
default:
break;
}
}
else
{
switch (s.Sclass)
{
/* local (and thread) symbols get only one level of indirection;
* all globally known symbols get two.
*/
case SCstatic:
case SClocstat:
x = 0;
goto case_got;
case SCglobal:
if (config.flags3 & CFG3pie)
x = 0;
else if (s.Stype.Tty & mTYthread)
x = 0;
else
x = 1;
goto case_got;
case SCcomdat:
case SCcomdef:
case SCextern:
if (s.Stype.Tty & mTYthread)
x = 0;
else
x = 1;
case_got:
{
const op = e.Eoper;
tym_t tym = e.Ety;
e.Eoper = OPrelconst;
e.Ety = TYnptr;
if (s.Stype.Tty & mTYthread)
{
/* Add "volatile" to prevent e from being common subexpressioned.
* This is so we can preserve the magic sequence of instructions
* that the gnu linker patches:
* lea EAX,x@tlsgd[1*EBX+0], call __tls_get_addr@plt
* =>
* mov EAX,gs[0], sub EAX,x@tpoff
* elf32-i386.c
*/
e.Ety |= mTYvolatile;
if (!tls_get_addr_sym)
{
/* void *___tls_get_addr(void *ptr);
* Parameter ptr is passed in EAX, matching TYjfunc calling convention.
*/
tls_get_addr_sym = symbol_name("___tls_get_addr",SCglobal,type_fake(TYjfunc));
symbol_keep(tls_get_addr_sym);
}
e = el_bin(OPcall, TYnptr, el_var(tls_get_addr_sym), e);
}
else
{
e = el_bin(OPadd, TYnptr, e, el_var(el_alloc_localgot()));
}
switch (op * 2 + x)
{
case OPvar * 2 + 1:
e = el_una(OPind, TYnptr, e);
e = el_una(OPind, TYnptr, e);
break;
case OPvar * 2 + 0:
case OPrelconst * 2 + 1:
e = el_una(OPind, TYnptr, e);
break;
case OPrelconst * 2 + 0:
break;
default:
assert(0);
}
e.Ety = tym;
break;
}
default:
break;
}
}
return e;
}
/**********************************************
* Create an elem for TLS variable `s`.
* Use PIE protocol.
* Params: s = variable's symbol
* Returns: elem created
*/
private elem *el_pievar(Symbol *s)
{
int x;
//printf("el_pievar(s = '%s')\n", s.Sident.ptr);
symbol_debug(s);
type_debug(s.Stype);
auto e = el_calloc();
e.Eoper = OPvar;
e.EV.Vsym = s;
e.Ety = s.ty();
if (I64)
{
switch (s.Sclass)
{
case SCstatic:
case SClocstat:
case SCglobal:
break;
case SCcomdat:
case SCcomdef:
case SCextern:
{
/* Generate:
* mov RAX,extern_tls@GOTTPOFF[RIP]
* mov EAX,FS:[RAX]
*/
Obj.refGOTsym();
tym_t tym = e.Ety;
e.Ety = TYfgPtr;
e = el_una(OPind, tym, e);
break;
}
default:
break;
}
}
else
{
switch (s.Sclass)
{
case SCstatic:
case SClocstat:
case SCglobal:
break;
case SCcomdat:
case SCcomdef:
case SCextern:
{
/* Generate:
* mov EAX,extern_tls@TLS_GOTIE[ECX]
* mov EAX,GS:[EAX]
*/
tym_t tym = e.Ety;
e.Eoper = OPrelconst;
e.Ety = TYnptr;
e = el_bin(OPadd, TYnptr, e, el_var(el_alloc_localgot()));
e = el_una(OPind, TYfgPtr, e);
e = el_una(OPind, tym, e);
break;
}
default:
break;
}
}
return e;
}
/**********************************************
* Create an address for TLS variable `s`.
* Use PIE protocol.
* Params: s = variable's symbol
* Returns: elem created
*/
private elem *el_pieptr(Symbol *s)
{
int x;
//printf("el_pieptr(s = '%s')\n", s.Sident.ptr);
symbol_debug(s);
type_debug(s.Stype);
auto e = el_calloc();
e.Eoper = OPrelconst;
e.EV.Vsym = s;
e.Ety = TYnptr;
elem* e0 = el_una(OPind, TYsize, el_long(TYfgPtr, 0)); // I64: FS:[0000], I32: GS:[0000]
if (I64)
{
Obj.refGOTsym(); // even though not used, generate reference to _GLOBAL_OFFSET_TABLE_
switch (s.Sclass)
{
case SCstatic:
case SClocstat:
case SCglobal:
{
/* Generate:
* mov RAX,FS:[0000]
* add EAX,offset FLAG:global_tls@TPOFF32
*/
e = el_bin(OPadd, TYnptr, e0, e);
break;
}
case SCcomdat:
case SCcomdef:
case SCextern:
{
/* Generate:
* mov RAX,extern_tls@GOTTPOFF[RIP]
* mov RDX,FS:[0000]
* add RAX,EDX
*/
e.Eoper = OPvar;
e = el_bin(OPadd, TYnptr, e0, e);
break;
}
default:
break;
}
}
else
{
switch (s.Sclass)
{
case SCstatic:
case SClocstat:
{
/* Generate:
* mov LEA,global_tls@TLS_LE[ECX]
* mov EDX,GS:[0000]
* add EAX,EDX
*/
e = el_bin(OPadd, TYnptr, e, el_var(el_alloc_localgot()));
e = el_bin(OPadd, TYnptr, e, e0);
break;
}
case SCglobal:
{
/* Generate:
* mov EAX,global_tls@TLS_LE[ECX]
* mov EDX,GS:[0000]
* add EAX,EDX
*/
e = el_bin(OPadd, TYnptr, e, el_var(el_alloc_localgot()));
e = el_una(OPind, TYnptr, e);
e = el_bin(OPadd, TYnptr, e, e0);
break;
}
case SCcomdat:
case SCcomdef:
case SCextern:
{
/* Generate:
* mov EAX,extern_tls@TLS_GOTIE[ECX]
* mov EDX,GS:[0000]
* add EAX,EDX
*/
e = el_bin(OPadd, TYnptr, e, el_var(el_alloc_localgot()));
e = el_una(OPind, TYnptr, e);
e = el_bin(OPadd, TYnptr, e, e0);