1 //===-- SparcMCExpr.cpp - Sparc specific MC expression classes --------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file contains the implementation of the assembly expression modifiers
11 // accepted by the Sparc architecture (e.g. "%hi", "%lo", ...).
12 //
13 //===----------------------------------------------------------------------===//
14
15 #include "SparcMCExpr.h"
16 #include "llvm/MC/MCAssembler.h"
17 #include "llvm/MC/MCContext.h"
18 #include "llvm/MC/MCObjectStreamer.h"
19 #include "llvm/MC/MCSymbolELF.h"
20 #include "llvm/Object/ELF.h"
21
22 using namespace llvm;
23
24 #define DEBUG_TYPE "sparcmcexpr"
25
26 const SparcMCExpr*
create(VariantKind Kind,const MCExpr * Expr,MCContext & Ctx)27 SparcMCExpr::create(VariantKind Kind, const MCExpr *Expr,
28 MCContext &Ctx) {
29 return new (Ctx) SparcMCExpr(Kind, Expr);
30 }
31
printImpl(raw_ostream & OS,const MCAsmInfo * MAI) const32 void SparcMCExpr::printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const {
33
34 bool closeParen = printVariantKind(OS, Kind);
35
36 const MCExpr *Expr = getSubExpr();
37 Expr->print(OS, MAI);
38
39 if (closeParen)
40 OS << ')';
41 }
42
printVariantKind(raw_ostream & OS,VariantKind Kind)43 bool SparcMCExpr::printVariantKind(raw_ostream &OS, VariantKind Kind)
44 {
45 bool closeParen = true;
46 switch (Kind) {
47 case VK_Sparc_None: closeParen = false; break;
48 case VK_Sparc_LO: OS << "%lo("; break;
49 case VK_Sparc_HI: OS << "%hi("; break;
50 case VK_Sparc_H44: OS << "%h44("; break;
51 case VK_Sparc_M44: OS << "%m44("; break;
52 case VK_Sparc_L44: OS << "%l44("; break;
53 case VK_Sparc_HH: OS << "%hh("; break;
54 case VK_Sparc_HM: OS << "%hm("; break;
55 // FIXME: use %pc22/%pc10, if system assembler supports them.
56 case VK_Sparc_PC22: OS << "%hi("; break;
57 case VK_Sparc_PC10: OS << "%lo("; break;
58 // FIXME: use %got22/%got10, if system assembler supports them.
59 case VK_Sparc_GOT22: OS << "%hi("; break;
60 case VK_Sparc_GOT10: OS << "%lo("; break;
61 case VK_Sparc_GOT13: closeParen = false; break;
62 case VK_Sparc_13: closeParen = false; break;
63 case VK_Sparc_WPLT30: closeParen = false; break;
64 case VK_Sparc_R_DISP32: OS << "%r_disp32("; break;
65 case VK_Sparc_TLS_GD_HI22: OS << "%tgd_hi22("; break;
66 case VK_Sparc_TLS_GD_LO10: OS << "%tgd_lo10("; break;
67 case VK_Sparc_TLS_GD_ADD: OS << "%tgd_add("; break;
68 case VK_Sparc_TLS_GD_CALL: OS << "%tgd_call("; break;
69 case VK_Sparc_TLS_LDM_HI22: OS << "%tldm_hi22("; break;
70 case VK_Sparc_TLS_LDM_LO10: OS << "%tldm_lo10("; break;
71 case VK_Sparc_TLS_LDM_ADD: OS << "%tldm_add("; break;
72 case VK_Sparc_TLS_LDM_CALL: OS << "%tldm_call("; break;
73 case VK_Sparc_TLS_LDO_HIX22: OS << "%tldo_hix22("; break;
74 case VK_Sparc_TLS_LDO_LOX10: OS << "%tldo_lox10("; break;
75 case VK_Sparc_TLS_LDO_ADD: OS << "%tldo_add("; break;
76 case VK_Sparc_TLS_IE_HI22: OS << "%tie_hi22("; break;
77 case VK_Sparc_TLS_IE_LO10: OS << "%tie_lo10("; break;
78 case VK_Sparc_TLS_IE_LD: OS << "%tie_ld("; break;
79 case VK_Sparc_TLS_IE_LDX: OS << "%tie_ldx("; break;
80 case VK_Sparc_TLS_IE_ADD: OS << "%tie_add("; break;
81 case VK_Sparc_TLS_LE_HIX22: OS << "%tle_hix22("; break;
82 case VK_Sparc_TLS_LE_LOX10: OS << "%tle_lox10("; break;
83 }
84 return closeParen;
85 }
86
parseVariantKind(StringRef name)87 SparcMCExpr::VariantKind SparcMCExpr::parseVariantKind(StringRef name)
88 {
89 return StringSwitch<SparcMCExpr::VariantKind>(name)
90 .Case("lo", VK_Sparc_LO)
91 .Case("hi", VK_Sparc_HI)
92 .Case("h44", VK_Sparc_H44)
93 .Case("m44", VK_Sparc_M44)
94 .Case("l44", VK_Sparc_L44)
95 .Case("hh", VK_Sparc_HH)
96 .Case("hm", VK_Sparc_HM)
97 .Case("pc22", VK_Sparc_PC22)
98 .Case("pc10", VK_Sparc_PC10)
99 .Case("got22", VK_Sparc_GOT22)
100 .Case("got10", VK_Sparc_GOT10)
101 .Case("got13", VK_Sparc_GOT13)
102 .Case("r_disp32", VK_Sparc_R_DISP32)
103 .Case("tgd_hi22", VK_Sparc_TLS_GD_HI22)
104 .Case("tgd_lo10", VK_Sparc_TLS_GD_LO10)
105 .Case("tgd_add", VK_Sparc_TLS_GD_ADD)
106 .Case("tgd_call", VK_Sparc_TLS_GD_CALL)
107 .Case("tldm_hi22", VK_Sparc_TLS_LDM_HI22)
108 .Case("tldm_lo10", VK_Sparc_TLS_LDM_LO10)
109 .Case("tldm_add", VK_Sparc_TLS_LDM_ADD)
110 .Case("tldm_call", VK_Sparc_TLS_LDM_CALL)
111 .Case("tldo_hix22", VK_Sparc_TLS_LDO_HIX22)
112 .Case("tldo_lox10", VK_Sparc_TLS_LDO_LOX10)
113 .Case("tldo_add", VK_Sparc_TLS_LDO_ADD)
114 .Case("tie_hi22", VK_Sparc_TLS_IE_HI22)
115 .Case("tie_lo10", VK_Sparc_TLS_IE_LO10)
116 .Case("tie_ld", VK_Sparc_TLS_IE_LD)
117 .Case("tie_ldx", VK_Sparc_TLS_IE_LDX)
118 .Case("tie_add", VK_Sparc_TLS_IE_ADD)
119 .Case("tle_hix22", VK_Sparc_TLS_LE_HIX22)
120 .Case("tle_lox10", VK_Sparc_TLS_LE_LOX10)
121 .Default(VK_Sparc_None);
122 }
123
getFixupKind(SparcMCExpr::VariantKind Kind)124 Sparc::Fixups SparcMCExpr::getFixupKind(SparcMCExpr::VariantKind Kind) {
125 switch (Kind) {
126 default: llvm_unreachable("Unhandled SparcMCExpr::VariantKind");
127 case VK_Sparc_LO: return Sparc::fixup_sparc_lo10;
128 case VK_Sparc_HI: return Sparc::fixup_sparc_hi22;
129 case VK_Sparc_H44: return Sparc::fixup_sparc_h44;
130 case VK_Sparc_M44: return Sparc::fixup_sparc_m44;
131 case VK_Sparc_L44: return Sparc::fixup_sparc_l44;
132 case VK_Sparc_HH: return Sparc::fixup_sparc_hh;
133 case VK_Sparc_HM: return Sparc::fixup_sparc_hm;
134 case VK_Sparc_PC22: return Sparc::fixup_sparc_pc22;
135 case VK_Sparc_PC10: return Sparc::fixup_sparc_pc10;
136 case VK_Sparc_GOT22: return Sparc::fixup_sparc_got22;
137 case VK_Sparc_GOT10: return Sparc::fixup_sparc_got10;
138 case VK_Sparc_GOT13: return Sparc::fixup_sparc_got13;
139 case VK_Sparc_13: return Sparc::fixup_sparc_13;
140 case VK_Sparc_WPLT30: return Sparc::fixup_sparc_wplt30;
141 case VK_Sparc_TLS_GD_HI22: return Sparc::fixup_sparc_tls_gd_hi22;
142 case VK_Sparc_TLS_GD_LO10: return Sparc::fixup_sparc_tls_gd_lo10;
143 case VK_Sparc_TLS_GD_ADD: return Sparc::fixup_sparc_tls_gd_add;
144 case VK_Sparc_TLS_GD_CALL: return Sparc::fixup_sparc_tls_gd_call;
145 case VK_Sparc_TLS_LDM_HI22: return Sparc::fixup_sparc_tls_ldm_hi22;
146 case VK_Sparc_TLS_LDM_LO10: return Sparc::fixup_sparc_tls_ldm_lo10;
147 case VK_Sparc_TLS_LDM_ADD: return Sparc::fixup_sparc_tls_ldm_add;
148 case VK_Sparc_TLS_LDM_CALL: return Sparc::fixup_sparc_tls_ldm_call;
149 case VK_Sparc_TLS_LDO_HIX22: return Sparc::fixup_sparc_tls_ldo_hix22;
150 case VK_Sparc_TLS_LDO_LOX10: return Sparc::fixup_sparc_tls_ldo_lox10;
151 case VK_Sparc_TLS_LDO_ADD: return Sparc::fixup_sparc_tls_ldo_add;
152 case VK_Sparc_TLS_IE_HI22: return Sparc::fixup_sparc_tls_ie_hi22;
153 case VK_Sparc_TLS_IE_LO10: return Sparc::fixup_sparc_tls_ie_lo10;
154 case VK_Sparc_TLS_IE_LD: return Sparc::fixup_sparc_tls_ie_ld;
155 case VK_Sparc_TLS_IE_LDX: return Sparc::fixup_sparc_tls_ie_ldx;
156 case VK_Sparc_TLS_IE_ADD: return Sparc::fixup_sparc_tls_ie_add;
157 case VK_Sparc_TLS_LE_HIX22: return Sparc::fixup_sparc_tls_le_hix22;
158 case VK_Sparc_TLS_LE_LOX10: return Sparc::fixup_sparc_tls_le_lox10;
159 }
160 }
161
162 bool
evaluateAsRelocatableImpl(MCValue & Res,const MCAsmLayout * Layout,const MCFixup * Fixup) const163 SparcMCExpr::evaluateAsRelocatableImpl(MCValue &Res,
164 const MCAsmLayout *Layout,
165 const MCFixup *Fixup) const {
166 return getSubExpr()->evaluateAsRelocatable(Res, Layout, Fixup);
167 }
168
fixELFSymbolsInTLSFixupsImpl(const MCExpr * Expr,MCAssembler & Asm)169 static void fixELFSymbolsInTLSFixupsImpl(const MCExpr *Expr, MCAssembler &Asm) {
170 switch (Expr->getKind()) {
171 case MCExpr::Target:
172 llvm_unreachable("Can't handle nested target expr!");
173 break;
174
175 case MCExpr::Constant:
176 break;
177
178 case MCExpr::Binary: {
179 const MCBinaryExpr *BE = cast<MCBinaryExpr>(Expr);
180 fixELFSymbolsInTLSFixupsImpl(BE->getLHS(), Asm);
181 fixELFSymbolsInTLSFixupsImpl(BE->getRHS(), Asm);
182 break;
183 }
184
185 case MCExpr::SymbolRef: {
186 const MCSymbolRefExpr &SymRef = *cast<MCSymbolRefExpr>(Expr);
187 cast<MCSymbolELF>(SymRef.getSymbol()).setType(ELF::STT_TLS);
188 break;
189 }
190
191 case MCExpr::Unary:
192 fixELFSymbolsInTLSFixupsImpl(cast<MCUnaryExpr>(Expr)->getSubExpr(), Asm);
193 break;
194 }
195
196 }
197
fixELFSymbolsInTLSFixups(MCAssembler & Asm) const198 void SparcMCExpr::fixELFSymbolsInTLSFixups(MCAssembler &Asm) const {
199 switch(getKind()) {
200 default: return;
201 case VK_Sparc_TLS_GD_CALL:
202 case VK_Sparc_TLS_LDM_CALL: {
203 // The corresponding relocations reference __tls_get_addr, as they call it,
204 // but this is only implicit; we must explicitly add it to our symbol table
205 // to bind it for these uses.
206 MCSymbol *Symbol = Asm.getContext().getOrCreateSymbol("__tls_get_addr");
207 Asm.registerSymbol(*Symbol);
208 auto ELFSymbol = cast<MCSymbolELF>(Symbol);
209 if (!ELFSymbol->isBindingSet()) {
210 ELFSymbol->setBinding(ELF::STB_GLOBAL);
211 ELFSymbol->setExternal(true);
212 }
213 LLVM_FALLTHROUGH;
214 }
215 case VK_Sparc_TLS_GD_HI22:
216 case VK_Sparc_TLS_GD_LO10:
217 case VK_Sparc_TLS_GD_ADD:
218 case VK_Sparc_TLS_LDM_HI22:
219 case VK_Sparc_TLS_LDM_LO10:
220 case VK_Sparc_TLS_LDM_ADD:
221 case VK_Sparc_TLS_LDO_HIX22:
222 case VK_Sparc_TLS_LDO_LOX10:
223 case VK_Sparc_TLS_LDO_ADD:
224 case VK_Sparc_TLS_IE_HI22:
225 case VK_Sparc_TLS_IE_LO10:
226 case VK_Sparc_TLS_IE_LD:
227 case VK_Sparc_TLS_IE_LDX:
228 case VK_Sparc_TLS_IE_ADD:
229 case VK_Sparc_TLS_LE_HIX22:
230 case VK_Sparc_TLS_LE_LOX10: break;
231 }
232 fixELFSymbolsInTLSFixupsImpl(getSubExpr(), Asm);
233 }
234
visitUsedExpr(MCStreamer & Streamer) const235 void SparcMCExpr::visitUsedExpr(MCStreamer &Streamer) const {
236 Streamer.visitUsedExpr(*getSubExpr());
237 }
238