LLVM 20.0.0git
SparcELFObjectWriter.cpp
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1//===-- SparcELFObjectWriter.cpp - Sparc ELF Writer -----------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
13#include "llvm/MC/MCExpr.h"
15#include "llvm/MC/MCValue.h"
17
18using namespace llvm;
19
20namespace {
21 class SparcELFObjectWriter : public MCELFObjectTargetWriter {
22 public:
23 SparcELFObjectWriter(bool Is64Bit, bool IsV8Plus, uint8_t OSABI)
25 Is64Bit, OSABI,
26 Is64Bit ? ELF::EM_SPARCV9
27 : (IsV8Plus ? ELF::EM_SPARC32PLUS : ELF::EM_SPARC),
28 /*HasRelocationAddend*/ true) {}
29
30 ~SparcELFObjectWriter() override = default;
31
32 protected:
33 unsigned getRelocType(MCContext &Ctx, const MCValue &Target,
34 const MCFixup &Fixup, bool IsPCRel) const override;
35
36 bool needsRelocateWithSymbol(const MCValue &Val, const MCSymbol &Sym,
37 unsigned Type) const override;
38 };
39}
40
41unsigned SparcELFObjectWriter::getRelocType(MCContext &Ctx,
42 const MCValue &Target,
43 const MCFixup &Fixup,
44 bool IsPCRel) const {
45 MCFixupKind Kind = Fixup.getKind();
48
49 if (const SparcMCExpr *SExpr = dyn_cast<SparcMCExpr>(Fixup.getValue())) {
50 if (SExpr->getKind() == SparcMCExpr::VK_Sparc_R_DISP32)
51 return ELF::R_SPARC_DISP32;
52 }
53
54 if (IsPCRel) {
55 switch(Fixup.getTargetKind()) {
56 default:
57 llvm_unreachable("Unimplemented fixup -> relocation");
58 case FK_Data_1: return ELF::R_SPARC_DISP8;
59 case FK_Data_2: return ELF::R_SPARC_DISP16;
60 case FK_Data_4: return ELF::R_SPARC_DISP32;
61 case FK_Data_8: return ELF::R_SPARC_DISP64;
62 case Sparc::fixup_sparc_call30: return ELF::R_SPARC_WDISP30;
63 case Sparc::fixup_sparc_br22: return ELF::R_SPARC_WDISP22;
64 case Sparc::fixup_sparc_br19: return ELF::R_SPARC_WDISP19;
66 return ELF::R_SPARC_WDISP16;
67 case Sparc::fixup_sparc_pc22: return ELF::R_SPARC_PC22;
68 case Sparc::fixup_sparc_pc10: return ELF::R_SPARC_PC10;
69 case Sparc::fixup_sparc_wplt30: return ELF::R_SPARC_WPLT30;
70 }
71 }
72
73 switch(Fixup.getTargetKind()) {
74 default:
75 llvm_unreachable("Unimplemented fixup -> relocation");
76 case FK_NONE: return ELF::R_SPARC_NONE;
77 case FK_Data_1: return ELF::R_SPARC_8;
78 case FK_Data_2: return ((Fixup.getOffset() % 2)
79 ? ELF::R_SPARC_UA16
80 : ELF::R_SPARC_16);
81 case FK_Data_4: return ((Fixup.getOffset() % 4)
82 ? ELF::R_SPARC_UA32
83 : ELF::R_SPARC_32);
84 case FK_Data_8: return ((Fixup.getOffset() % 8)
85 ? ELF::R_SPARC_UA64
86 : ELF::R_SPARC_64);
87 case Sparc::fixup_sparc_13: return ELF::R_SPARC_13;
88 case Sparc::fixup_sparc_hi22: return ELF::R_SPARC_HI22;
89 case Sparc::fixup_sparc_lo10: return ELF::R_SPARC_LO10;
90 case Sparc::fixup_sparc_h44: return ELF::R_SPARC_H44;
91 case Sparc::fixup_sparc_m44: return ELF::R_SPARC_M44;
92 case Sparc::fixup_sparc_l44: return ELF::R_SPARC_L44;
93 case Sparc::fixup_sparc_hh: return ELF::R_SPARC_HH22;
94 case Sparc::fixup_sparc_hm: return ELF::R_SPARC_HM10;
95 case Sparc::fixup_sparc_lm: return ELF::R_SPARC_LM22;
96 case Sparc::fixup_sparc_got22: return ELF::R_SPARC_GOT22;
97 case Sparc::fixup_sparc_got10: return ELF::R_SPARC_GOT10;
98 case Sparc::fixup_sparc_got13: return ELF::R_SPARC_GOT13;
99 case Sparc::fixup_sparc_tls_gd_hi22: return ELF::R_SPARC_TLS_GD_HI22;
100 case Sparc::fixup_sparc_tls_gd_lo10: return ELF::R_SPARC_TLS_GD_LO10;
101 case Sparc::fixup_sparc_tls_gd_add: return ELF::R_SPARC_TLS_GD_ADD;
102 case Sparc::fixup_sparc_tls_gd_call: return ELF::R_SPARC_TLS_GD_CALL;
103 case Sparc::fixup_sparc_tls_ldm_hi22: return ELF::R_SPARC_TLS_LDM_HI22;
104 case Sparc::fixup_sparc_tls_ldm_lo10: return ELF::R_SPARC_TLS_LDM_LO10;
105 case Sparc::fixup_sparc_tls_ldm_add: return ELF::R_SPARC_TLS_LDM_ADD;
106 case Sparc::fixup_sparc_tls_ldm_call: return ELF::R_SPARC_TLS_LDM_CALL;
107 case Sparc::fixup_sparc_tls_ldo_hix22: return ELF::R_SPARC_TLS_LDO_HIX22;
108 case Sparc::fixup_sparc_tls_ldo_lox10: return ELF::R_SPARC_TLS_LDO_LOX10;
109 case Sparc::fixup_sparc_tls_ldo_add: return ELF::R_SPARC_TLS_LDO_ADD;
110 case Sparc::fixup_sparc_tls_ie_hi22: return ELF::R_SPARC_TLS_IE_HI22;
111 case Sparc::fixup_sparc_tls_ie_lo10: return ELF::R_SPARC_TLS_IE_LO10;
112 case Sparc::fixup_sparc_tls_ie_ld: return ELF::R_SPARC_TLS_IE_LD;
113 case Sparc::fixup_sparc_tls_ie_ldx: return ELF::R_SPARC_TLS_IE_LDX;
114 case Sparc::fixup_sparc_tls_ie_add: return ELF::R_SPARC_TLS_IE_ADD;
115 case Sparc::fixup_sparc_tls_le_hix22: return ELF::R_SPARC_TLS_LE_HIX22;
116 case Sparc::fixup_sparc_tls_le_lox10: return ELF::R_SPARC_TLS_LE_LOX10;
117 case Sparc::fixup_sparc_hix22: return ELF::R_SPARC_HIX22;
118 case Sparc::fixup_sparc_lox10: return ELF::R_SPARC_LOX10;
119 case Sparc::fixup_sparc_gotdata_hix22: return ELF::R_SPARC_GOTDATA_HIX22;
120 case Sparc::fixup_sparc_gotdata_lox10: return ELF::R_SPARC_GOTDATA_LOX10;
121 case Sparc::fixup_sparc_gotdata_op: return ELF::R_SPARC_GOTDATA_OP;
122 }
123
124 return ELF::R_SPARC_NONE;
125}
126
127bool SparcELFObjectWriter::needsRelocateWithSymbol(const MCValue &,
128 const MCSymbol &,
129 unsigned Type) const {
130 switch (Type) {
131 default:
132 return false;
133
134 // All relocations that use a GOT need a symbol, not an offset, as
135 // the offset of the symbol within the section is irrelevant to
136 // where the GOT entry is. Don't need to list all the TLS entries,
137 // as they're all marked as requiring a symbol anyways.
138 case ELF::R_SPARC_GOT10:
139 case ELF::R_SPARC_GOT13:
140 case ELF::R_SPARC_GOT22:
141 case ELF::R_SPARC_GOTDATA_HIX22:
142 case ELF::R_SPARC_GOTDATA_LOX10:
143 case ELF::R_SPARC_GOTDATA_OP_HIX22:
144 case ELF::R_SPARC_GOTDATA_OP_LOX10:
145 return true;
146 }
147}
148
149std::unique_ptr<MCObjectTargetWriter>
150llvm::createSparcELFObjectWriter(bool Is64Bit, bool IsV8Plus, uint8_t OSABI) {
151 return std::make_unique<SparcELFObjectWriter>(Is64Bit, IsV8Plus, OSABI);
152}
basic Basic Alias true
Symbol * Sym
Definition: ELF_riscv.cpp:479
PowerPC TLS Dynamic Call Fixup
Context object for machine code objects.
Definition: MCContext.h:83
virtual bool needsRelocateWithSymbol(const MCValue &Val, const MCSymbol &Sym, unsigned Type) const
virtual unsigned getRelocType(MCContext &Ctx, const MCValue &Target, const MCFixup &Fixup, bool IsPCRel) const =0
Encode information on a single operation to perform on a byte sequence (e.g., an encoded instruction)...
Definition: MCFixup.h:71
MCSymbol - Instances of this class represent a symbol name in the MC file, and MCSymbols are created ...
Definition: MCSymbol.h:41
This represents an "assembler immediate".
Definition: MCValue.h:36
Target - Wrapper for Target specific information.
The instances of the Type class are immutable: once they are created, they are never changed.
Definition: Type.h:45
#define llvm_unreachable(msg)
Marks that the current location is not supposed to be reachable.
@ EM_SPARC
Definition: ELF.h:136
@ EM_SPARC32PLUS
Definition: ELF.h:147
@ EM_SPARCV9
Definition: ELF.h:160
@ fixup_sparc_lo10
fixup_sparc_lo10 - 10-bit fixup corresponding to lo(foo)
@ fixup_sparc_br16
fixup_sparc_bpr - 16-bit fixup for bpr
@ fixup_sparc_lm
fixup_sparc_lm - 22-bit fixup corresponding to lm(foo)
@ fixup_sparc_lox10
13-bit fixup corresponding to lox(foo)
@ fixup_sparc_hi22
fixup_sparc_hi22 - 22-bit fixup corresponding to hi(foo) for sethi
@ fixup_sparc_tls_ldo_lox10
@ fixup_sparc_tls_le_hix22
@ fixup_sparc_m44
fixup_sparc_m44 - 10-bit fixup corresponding to m44(foo)
@ fixup_sparc_gotdata_hix22
22-bit fixup corresponding to gdop_hix22(foo)
@ fixup_sparc_hh
fixup_sparc_hh - 22-bit fixup corresponding to hh(foo)
@ fixup_sparc_got10
fixup_sparc_got10 - 10-bit fixup corresponding to got10(foo)
@ fixup_sparc_tls_le_lox10
@ fixup_sparc_got13
fixup_sparc_got13 - 13-bit fixup corresponding to got13(foo)
@ fixup_sparc_tls_ldo_hix22
@ fixup_sparc_gotdata_op
32-bit fixup corresponding to gdop(foo)
@ fixup_sparc_tls_gd_hi22
fixups for Thread Local Storage
@ fixup_sparc_br19
fixup_sparc_br19 - 19-bit PC relative relocation for branches on icc/xcc
@ fixup_sparc_13
fixup_sparc_13 - 13-bit fixup
@ fixup_sparc_hix22
22-bit fixup corresponding to hix(foo)
@ fixup_sparc_got22
fixup_sparc_got22 - 22-bit fixup corresponding to got22(foo)
@ fixup_sparc_h44
fixup_sparc_h44 - 22-bit fixup corresponding to h44(foo)
@ fixup_sparc_tls_ldm_lo10
@ fixup_sparc_tls_ldm_call
@ fixup_sparc_pc22
fixup_sparc_pc22 - 22-bit fixup corresponding to pc22(foo)
@ fixup_sparc_tls_ldm_hi22
@ fixup_sparc_br22
fixup_sparc_br22 - 22-bit PC relative relocation for branches
@ fixup_sparc_l44
fixup_sparc_l44 - 12-bit fixup corresponding to l44(foo)
@ fixup_sparc_gotdata_lox10
13-bit fixup corresponding to gdop_lox10(foo)
@ fixup_sparc_pc10
fixup_sparc_pc10 - 10-bit fixup corresponding to pc10(foo)
@ fixup_sparc_hm
fixup_sparc_hm - 10-bit fixup corresponding to hm(foo)
@ fixup_sparc_wplt30
fixup_sparc_wplt30
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18
std::unique_ptr< MCObjectTargetWriter > createSparcELFObjectWriter(bool Is64Bit, bool IsV8Plus, uint8_t OSABI)
MCFixupKind
Extensible enumeration to represent the type of a fixup.
Definition: MCFixup.h:21
@ FirstLiteralRelocationKind
The range [FirstLiteralRelocationKind, MaxTargetFixupKind) is used for relocations coming from ....
Definition: MCFixup.h:50
@ FK_Data_8
A eight-byte fixup.
Definition: MCFixup.h:26
@ FK_Data_1
A one-byte fixup.
Definition: MCFixup.h:23
@ FK_Data_4
A four-byte fixup.
Definition: MCFixup.h:25
@ FK_NONE
A no-op fixup.
Definition: MCFixup.h:22
@ FK_Data_2
A two-byte fixup.
Definition: MCFixup.h:24