1 //===-- AArch64MCExpr.cpp - AArch64 specific MC expression classes --------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains the implementation of the assembly expression modifiers
11 // accepted by the AArch64 architecture (e.g. ":lo12:", ":gottprel_g1:", ...).
13 //===----------------------------------------------------------------------===//
15 #include "AArch64MCExpr.h"
16 #include "llvm/MC/MCAssembler.h"
17 #include "llvm/MC/MCContext.h"
18 #include "llvm/MC/MCELF.h"
19 #include "llvm/Object/ELF.h"
23 #define DEBUG_TYPE "aarch64mcexpr"
26 AArch64MCExpr::Create(VariantKind Kind, const MCExpr *Expr,
28 return new (Ctx) AArch64MCExpr(Kind, Expr);
31 void AArch64MCExpr::PrintImpl(raw_ostream &OS) const {
33 default: llvm_unreachable("Invalid kind!");
34 case VK_AARCH64_GOT: OS << ":got:"; break;
35 case VK_AARCH64_GOT_LO12: OS << ":got_lo12:"; break;
36 case VK_AARCH64_LO12: OS << ":lo12:"; break;
37 case VK_AARCH64_ABS_G0: OS << ":abs_g0:"; break;
38 case VK_AARCH64_ABS_G0_NC: OS << ":abs_g0_nc:"; break;
39 case VK_AARCH64_ABS_G1: OS << ":abs_g1:"; break;
40 case VK_AARCH64_ABS_G1_NC: OS << ":abs_g1_nc:"; break;
41 case VK_AARCH64_ABS_G2: OS << ":abs_g2:"; break;
42 case VK_AARCH64_ABS_G2_NC: OS << ":abs_g2_nc:"; break;
43 case VK_AARCH64_ABS_G3: OS << ":abs_g3:"; break;
44 case VK_AARCH64_SABS_G0: OS << ":abs_g0_s:"; break;
45 case VK_AARCH64_SABS_G1: OS << ":abs_g1_s:"; break;
46 case VK_AARCH64_SABS_G2: OS << ":abs_g2_s:"; break;
47 case VK_AARCH64_DTPREL_G2: OS << ":dtprel_g2:"; break;
48 case VK_AARCH64_DTPREL_G1: OS << ":dtprel_g1:"; break;
49 case VK_AARCH64_DTPREL_G1_NC: OS << ":dtprel_g1_nc:"; break;
50 case VK_AARCH64_DTPREL_G0: OS << ":dtprel_g0:"; break;
51 case VK_AARCH64_DTPREL_G0_NC: OS << ":dtprel_g0_nc:"; break;
52 case VK_AARCH64_DTPREL_HI12: OS << ":dtprel_hi12:"; break;
53 case VK_AARCH64_DTPREL_LO12: OS << ":dtprel_lo12:"; break;
54 case VK_AARCH64_DTPREL_LO12_NC: OS << ":dtprel_lo12_nc:"; break;
55 case VK_AARCH64_GOTTPREL_G1: OS << ":gottprel_g1:"; break;
56 case VK_AARCH64_GOTTPREL_G0_NC: OS << ":gottprel_g0_nc:"; break;
57 case VK_AARCH64_GOTTPREL: OS << ":gottprel:"; break;
58 case VK_AARCH64_GOTTPREL_LO12: OS << ":gottprel_lo12:"; break;
59 case VK_AARCH64_TPREL_G2: OS << ":tprel_g2:"; break;
60 case VK_AARCH64_TPREL_G1: OS << ":tprel_g1:"; break;
61 case VK_AARCH64_TPREL_G1_NC: OS << ":tprel_g1_nc:"; break;
62 case VK_AARCH64_TPREL_G0: OS << ":tprel_g0:"; break;
63 case VK_AARCH64_TPREL_G0_NC: OS << ":tprel_g0_nc:"; break;
64 case VK_AARCH64_TPREL_HI12: OS << ":tprel_hi12:"; break;
65 case VK_AARCH64_TPREL_LO12: OS << ":tprel_lo12:"; break;
66 case VK_AARCH64_TPREL_LO12_NC: OS << ":tprel_lo12_nc:"; break;
67 case VK_AARCH64_TLSDESC: OS << ":tlsdesc:"; break;
68 case VK_AARCH64_TLSDESC_LO12: OS << ":tlsdesc_lo12:"; break;
72 const MCExpr *Expr = getSubExpr();
73 if (Expr->getKind() != MCExpr::SymbolRef)
76 if (Expr->getKind() != MCExpr::SymbolRef)
81 AArch64MCExpr::EvaluateAsRelocatableImpl(MCValue &Res,
82 const MCAsmLayout *Layout) const {
83 return getSubExpr()->EvaluateAsRelocatable(Res, Layout);
86 static void fixELFSymbolsInTLSFixupsImpl(const MCExpr *Expr, MCAssembler &Asm) {
87 switch (Expr->getKind()) {
89 llvm_unreachable("Can't handle nested target expression");
91 case MCExpr::Constant:
94 case MCExpr::Binary: {
95 const MCBinaryExpr *BE = cast<MCBinaryExpr>(Expr);
96 fixELFSymbolsInTLSFixupsImpl(BE->getLHS(), Asm);
97 fixELFSymbolsInTLSFixupsImpl(BE->getRHS(), Asm);
101 case MCExpr::SymbolRef: {
102 // We're known to be under a TLS fixup, so any symbol should be
103 // modified. There should be only one.
104 const MCSymbolRefExpr &SymRef = *cast<MCSymbolRefExpr>(Expr);
105 MCSymbolData &SD = Asm.getOrCreateSymbolData(SymRef.getSymbol());
106 MCELF::SetType(SD, ELF::STT_TLS);
111 fixELFSymbolsInTLSFixupsImpl(cast<MCUnaryExpr>(Expr)->getSubExpr(), Asm);
116 void AArch64MCExpr::fixELFSymbolsInTLSFixups(MCAssembler &Asm) const {
120 case VK_AARCH64_DTPREL_G2:
121 case VK_AARCH64_DTPREL_G1:
122 case VK_AARCH64_DTPREL_G1_NC:
123 case VK_AARCH64_DTPREL_G0:
124 case VK_AARCH64_DTPREL_G0_NC:
125 case VK_AARCH64_DTPREL_HI12:
126 case VK_AARCH64_DTPREL_LO12:
127 case VK_AARCH64_DTPREL_LO12_NC:
128 case VK_AARCH64_GOTTPREL_G1:
129 case VK_AARCH64_GOTTPREL_G0_NC:
130 case VK_AARCH64_GOTTPREL:
131 case VK_AARCH64_GOTTPREL_LO12:
132 case VK_AARCH64_TPREL_G2:
133 case VK_AARCH64_TPREL_G1:
134 case VK_AARCH64_TPREL_G1_NC:
135 case VK_AARCH64_TPREL_G0:
136 case VK_AARCH64_TPREL_G0_NC:
137 case VK_AARCH64_TPREL_HI12:
138 case VK_AARCH64_TPREL_LO12:
139 case VK_AARCH64_TPREL_LO12_NC:
140 case VK_AARCH64_TLSDESC:
141 case VK_AARCH64_TLSDESC_LO12:
145 fixELFSymbolsInTLSFixupsImpl(getSubExpr(), Asm);
148 // FIXME: This basically copies MCObjectStreamer::AddValueSymbols. Perhaps
149 // that method should be made public?
150 // FIXME: really do above: now that two backends are using it.
151 static void AddValueSymbolsImpl(const MCExpr *Value, MCAssembler *Asm) {
152 switch (Value->getKind()) {
154 llvm_unreachable("Can't handle nested target expr!");
157 case MCExpr::Constant:
160 case MCExpr::Binary: {
161 const MCBinaryExpr *BE = cast<MCBinaryExpr>(Value);
162 AddValueSymbolsImpl(BE->getLHS(), Asm);
163 AddValueSymbolsImpl(BE->getRHS(), Asm);
167 case MCExpr::SymbolRef:
168 Asm->getOrCreateSymbolData(cast<MCSymbolRefExpr>(Value)->getSymbol());
172 AddValueSymbolsImpl(cast<MCUnaryExpr>(Value)->getSubExpr(), Asm);
177 void AArch64MCExpr::AddValueSymbols(MCAssembler *Asm) const {
178 AddValueSymbolsImpl(getSubExpr(), Asm);