36 changes: 36 additions & 0 deletions lld/lib/ReaderWriter/ELF/Mips/MipsSectionChunks.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -79,6 +79,42 @@ template <class ELFType> class MipsGOTSection : public AtomSection<ELFType> {
llvm::DenseMap<const Atom *, std::size_t> _posMap;
};

/// \brief Handle Mips PLT section
template <class ELFType> class MipsPLTSection : public AtomSection<ELFType> {
public:
MipsPLTSection(const MipsLinkingContext &context)
: AtomSection<ELFType>(context, ".plt", DefinedAtom::typeGOT,
DefinedAtom::permR_X,
MipsTargetLayout<ELFType>::ORDER_PLT) {}

const AtomLayout *findPLTLayout(const Atom *plt) const {
auto it = _pltLayoutMap.find(plt);
return it != _pltLayoutMap.end() ? it->second : nullptr;
}

const lld::AtomLayout &appendAtom(const Atom *atom) override {
const auto &layout = AtomSection<ELFType>::appendAtom(atom);

const DefinedAtom *da = cast<DefinedAtom>(atom);

for (const auto &r : *da) {
if (r->kindNamespace() != lld::Reference::KindNamespace::ELF)
continue;
assert(r->kindArch() == Reference::KindArch::Mips);
if (r->kindValue() == LLD_R_MIPS_STO_PLT) {
_pltLayoutMap[r->target()] = &layout;
break;
}
}

return layout;
}

private:
/// \brief Map PLT Atoms to their layouts.
std::unordered_map<const Atom *, const AtomLayout *> _pltLayoutMap;
};

} // elf
} // lld

Expand Down
2 changes: 2 additions & 0 deletions lld/lib/ReaderWriter/ELF/Mips/MipsTargetHandler.cpp
View file
Original file line number Diff line number Diff line change
Expand Up @@ -49,6 +49,7 @@ void MipsTargetHandler::registerRelocationNames(Registry &registry) {
const Registry::KindStrings MipsTargetHandler::kindStrings[] = {
LLD_KIND_STRING_ENTRY(R_MIPS_NONE),
LLD_KIND_STRING_ENTRY(R_MIPS_32),
LLD_KIND_STRING_ENTRY(R_MIPS_REL32),
LLD_KIND_STRING_ENTRY(R_MIPS_26),
LLD_KIND_STRING_ENTRY(R_MIPS_HI16),
LLD_KIND_STRING_ENTRY(R_MIPS_LO16),
Expand All @@ -63,5 +64,6 @@ const Registry::KindStrings MipsTargetHandler::kindStrings[] = {
LLD_KIND_STRING_ENTRY(LLD_R_MIPS_GLOBAL_26),
LLD_KIND_STRING_ENTRY(LLD_R_MIPS_HI16),
LLD_KIND_STRING_ENTRY(LLD_R_MIPS_LO16),
LLD_KIND_STRING_ENTRY(LLD_R_MIPS_STO_PLT),
LLD_KIND_STRING_END
};
25 changes: 25 additions & 0 deletions lld/lib/ReaderWriter/ELF/Mips/MipsTargetHandler.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -26,16 +26,20 @@ class MipsTargetLayout final : public TargetLayout<ELFType> {
MipsTargetLayout(const MipsLinkingContext &ctx)
: TargetLayout<ELFType>(ctx),
_gotSection(new (_alloc) MipsGOTSection<ELFType>(ctx)),
_pltSection(new (_alloc) MipsPLTSection<ELFType>(ctx)),
_cachedGP(false) {}

const MipsGOTSection<ELFType> &getGOTSection() const { return *_gotSection; }
const MipsPLTSection<ELFType> &getPLTSection() const { return *_pltSection; }

AtomSection<ELFType> *
createSection(StringRef name, int32_t type,
DefinedAtom::ContentPermissions permissions,
Layout::SectionOrder order) override {
if (type == DefinedAtom::typeGOT && name == ".got")
return _gotSection;
if (type == DefinedAtom::typeStub && name == ".plt")
return _pltSection;
return DefaultLayout<ELFType>::createSection(name, type, permissions,
order);
}
Expand All @@ -56,6 +60,7 @@ class MipsTargetLayout final : public TargetLayout<ELFType> {
private:
llvm::BumpPtrAllocator _alloc;
MipsGOTSection<ELFType> *_gotSection;
MipsPLTSection<ELFType> *_pltSection;
AtomLayout *_gp;
bool _cachedGP;
};
Expand Down Expand Up @@ -119,6 +124,26 @@ class MipsDynamicSymbolTable : public DynamicSymbolTable<ELFT> {
});
}

void finalize() override {
const auto &pltSection = _targetLayout.getPLTSection();

// Under some conditions a dynamic symbol table record should hold a symbol
// value of the corresponding PLT entry. For details look at the PLT entry
// creation code in the class MipsRelocationPass. Let's update atomLayout
// fields for such symbols.
for (auto &ste : this->_symbolTable) {
if (!ste._atom || ste._atomLayout)
continue;
auto *layout = pltSection.findPLTLayout(ste._atom);
if (layout) {
ste._symbol.st_value = layout->_virtualAddr;
ste._symbol.st_other |= ELF::STO_MIPS_PLT;
}
}

DynamicSymbolTable<Mips32ElELFType>::finalize();
}

private:
MipsTargetLayout<ELFT> &_targetLayout;
};
Expand Down
136 changes: 0 additions & 136 deletions lld/test/elf/Mips/plt-1.test
View file

This file was deleted.

48 changes: 0 additions & 48 deletions lld/test/elf/Mips/plt-2.test
View file

This file was deleted.

11 changes: 1 addition & 10 deletions lld/test/elf/Mips/rel-copy.test
View file
Original file line number Diff line number Diff line change
Expand Up @@ -11,8 +11,8 @@

# CHECK: Relocations [
# CHECK-NEXT: Section (5) .rel.dyn {
# CHECK-NEXT: 0x402004 R_MIPS_REL32 D2 0x0
# CHECK-NEXT: 0x402008 R_MIPS_COPY D1 0x0
# CHECK-NEXT: 0x402010 R_MIPS_COPY D2 0x0
# CHECK-NEXT: }
# CHECK-NEXT: ]

Expand All @@ -36,15 +36,6 @@
# CHECK-NEXT: Section: .bss (0xA)
# CHECK-NEXT: }
# CHECK-NEXT: Symbol {
# CHECK-NEXT: Name: D2@ (4)
# CHECK-NEXT: Value: 0x402010
# CHECK-NEXT: Size: 4
# CHECK-NEXT: Binding: Global (0x1)
# CHECK-NEXT: Type: Object (0x1)
# CHECK-NEXT: Other: 0
# CHECK-NEXT: Section: .bss (0xA)
# CHECK-NEXT: }
# CHECK-NEXT: Symbol {
# CHECK-NEXT: Name: D1@ (1)
# CHECK-NEXT: Value: 0x0
# CHECK-NEXT: Size: 4
Expand Down
194 changes: 194 additions & 0 deletions lld/test/elf/Mips/rel-dynamic-01.test
View file
Original file line number Diff line number Diff line change
@@ -0,0 +1,194 @@
# REQUIRES: mips

# Conditions:
# a) Linking a non-shared executable file.
# b) Relocations' targets are symbols defined in the shared object.
# Check:
# a) Emitting R_MIPS_REL32, R_MIPS_COPY, R_MIPS_JUMP_SLOT relocations.
# b) PLT entries creation.
# c) STO_MIPS_PLT flag in the dynamic symbol table for symbols require
# a pointer equality.
#
# RUN: yaml2obj -format=elf %S/Inputs/pic-obj.yaml > %t-so-obj
# RUN: lld -flavor gnu -target mipsel -shared -o %t-so %t-so-obj
# RUN: yaml2obj -format=elf %s > %t-obj
# RUN: lld -flavor gnu -target mipsel -e T0 -o %t1-exe %t-obj %t-so
# RUN: llvm-objdump -disassemble %t1-exe | FileCheck -check-prefix=PLT %s
# RUN: llvm-readobj -dt -r %t1-exe | FileCheck -check-prefix=PLT-SYM %s

# PLT: Disassembly of section .plt:
# PLT-NEXT: .plt:
# PLT-NEXT: 400210: 40 00 1c 3c lui $gp, 64
# PLT-NEXT: 400214: 00 20 99 8f lw $25, 8192($gp)
# PLT-NEXT: 400218: 00 20 9c 27 addiu $gp, $gp, 8192
# PLT-NEXT: 40021c: 23 c0 1c 03 subu $24, $24, $gp
# PLT-NEXT: 400220: 21 78 e0 03 move $15, $ra
# PLT-NEXT: 400224: 82 c0 18 00 srl $24, $24, 2
# PLT-NEXT: 400228: 09 f8 20 03 jalr $25
# PLT-NEXT: 40022c: fe ff 18 27 addiu $24, $24, -2
#
# PLT-NEXT: 400230: 40 00 0f 3c lui $15, 64
# PLT-NEXT: 400234: 08 20 f9 8d lw $25, 8200($15)
# PLT-NEXT: 400238: 08 00 20 03 jr $25
# PLT-NEXT: 40023c: 08 20 f8 25 addiu $24, $15, 8200
#
# PLT-NEXT: 400240: 40 00 0f 3c lui $15, 64
# PLT-NEXT: 400244: 0c 20 f9 8d lw $25, 8204($15)
# PLT-NEXT: 400248: 08 00 20 03 jr $25
# PLT-NEXT: 40024c: 0c 20 f8 25 addiu $24, $15, 8204

# PLT-SYM: Relocations [
# PLT-SYM-NEXT: Section (5) .rel.dyn {
# PLT-SYM-NEXT: 0x402014 R_MIPS_REL32 T2 0x0
# PLT-SYM-NEXT: 0x402014 R_MIPS_REL32 D2 0x0
# PLT-SYM-NEXT: 0x402018 R_MIPS_COPY D1 0x0
# PLT-SYM-NEXT: }
# PLT-SYM-NEXT: Section (6) .rel.plt {
# PLT-SYM-NEXT: 0x402008 R_MIPS_JUMP_SLOT T3 0x0
# PLT-SYM-NEXT: 0x40200C R_MIPS_JUMP_SLOT T1 0x0
# PLT-SYM-NEXT: }
# PLT-SYM-NEXT: ]

# PLT-SYM: DynamicSymbols [
# PLT-SYM-NEXT: Symbol {
# PLT-SYM-NEXT: Name: @ (0)
# PLT-SYM-NEXT: Value: 0x0
# PLT-SYM-NEXT: Size: 0
# PLT-SYM-NEXT: Binding: Local (0x0)
# PLT-SYM-NEXT: Type: None (0x0)
# PLT-SYM-NEXT: Other: 0
# PLT-SYM-NEXT: Section: Undefined (0x0)
# PLT-SYM-NEXT: }
# PLT-SYM-NEXT: Symbol {
# PLT-SYM-NEXT: Name: D1@ (1)
# PLT-SYM-NEXT: Value: 0x402018
# PLT-SYM-NEXT: Size: 4
# PLT-SYM-NEXT: Binding: Global (0x1)
# PLT-SYM-NEXT: Type: Object (0x1)
# PLT-SYM-NEXT: Other: 0
# PLT-SYM-NEXT: Section: .bss (0xD)
# PLT-SYM-NEXT: }
# PLT-SYM-NEXT: Symbol {
# PLT-SYM-NEXT: Name: T3@ (7)
# PLT-SYM-NEXT: Value: 0x0
# PLT-SYM-NEXT: Size: 0
# PLT-SYM-NEXT: Binding: Global (0x1)
# PLT-SYM-NEXT: Type: Function (0x2)
# PLT-SYM-NEXT: Other: 0
# PLT-SYM-NEXT: Section: Undefined (0x0)
# PLT-SYM-NEXT: }
# PLT-SYM-NEXT: Symbol {
# PLT-SYM-NEXT: Name: T1@ (10)
# PLT-SYM-NEXT: Value: 0x400240
# PLT-SYM-NEXT: Size: 0
# PLT-SYM-NEXT: Binding: Global (0x1)
# PLT-SYM-NEXT: Type: Function (0x2)
# PLT-SYM-NEXT: Other: 8
# PLT-SYM-NEXT: Section: Undefined (0x0)
# PLT-SYM-NEXT: }
# PLT-SYM-NEXT: Symbol {
# PLT-SYM-NEXT: Name: D1@ (1)
# PLT-SYM-NEXT: Value: 0x0
# PLT-SYM-NEXT: Size: 4
# PLT-SYM-NEXT: Binding: Global (0x1)
# PLT-SYM-NEXT: Type: Object (0x1)
# PLT-SYM-NEXT: Other: 0
# PLT-SYM-NEXT: Section: Undefined (0x0)
# PLT-SYM-NEXT: }
# PLT-SYM-NEXT: Symbol {
# PLT-SYM-NEXT: Name: T2@ (4)
# PLT-SYM-NEXT: Value: 0x0
# PLT-SYM-NEXT: Size: 0
# PLT-SYM-NEXT: Binding: Global (0x1)
# PLT-SYM-NEXT: Type: Function (0x2)
# PLT-SYM-NEXT: Other: 0
# PLT-SYM-NEXT: Section: Undefined (0x0)
# PLT-SYM-NEXT: }
# PLT-SYM-NEXT: Symbol {
# PLT-SYM-NEXT: Name: D2@ (13)
# PLT-SYM-NEXT: Value: 0x0
# PLT-SYM-NEXT: Size: 4
# PLT-SYM-NEXT: Binding: Global (0x1)
# PLT-SYM-NEXT: Type: Object (0x1)
# PLT-SYM-NEXT: Other: 0
# PLT-SYM-NEXT: Section: Undefined (0x0)
# PLT-SYM-NEXT: }
# PLT-SYM-NEXT: ]

!ELF
FileHeader: !FileHeader
Class: ELFCLASS32
Data: ELFDATA2LSB
Type: ET_REL
Machine: EM_MIPS
Flags: [EF_MIPS_CPIC]

Sections:
- Name: .text
Type: SHT_PROGBITS
Content: "0000000000000000"
AddressAlign: 16
Flags: [SHF_EXECINSTR, SHF_ALLOC]

- Name: .data
Type: SHT_PROGBITS
Content: "0000000000000000"
AddressAlign: 16
Flags: [SHF_WRITE, SHF_ALLOC]

- Name: .rel.text
Type: SHT_REL
Info: .text
AddressAlign: 4
Relocations:
- Offset: 0x04
Symbol: T3
Type: R_MIPS_26

- Name: .rel.data
Type: SHT_REL
Info: .data
AddressAlign: 4
Relocations:
- Offset: 0x00
Symbol: T1
Type: R_MIPS_HI16
- Offset: 0x00
Symbol: T1
Type: R_MIPS_LO16
- Offset: 0x04
Symbol: T2
Type: R_MIPS_32

- Offset: 0x04
Symbol: D1
Type: R_MIPS_HI16
- Offset: 0x04
Symbol: D1
Type: R_MIPS_LO16
- Offset: 0x04
Symbol: D2
Type: R_MIPS_32

Symbols:
Global:
- Name: T0
Section: .text
Type: STT_FUNC
Value: 0x0
Size: 8
- Name: T1
Type: STT_FUNC
- Name: T2
Type: STT_FUNC
- Name: T3
Type: STT_FUNC
- Name: D0
Section: .data
Type: STT_OBJECT
Value: 0x0
Size: 8
- Name: D1
Type: STT_OBJECT
- Name: D2
Type: STT_OBJECT
82 changes: 82 additions & 0 deletions lld/test/elf/Mips/rel-dynamic-02.test
View file
Original file line number Diff line number Diff line change
@@ -0,0 +1,82 @@
# Conditions:
# a) Linking a shared library.
# b) Relocations' targets are undefined symbols.
# Check:
# a) Emitting R_MIPS_REL32 relocations for both undefined symbols.
# b) There should be no PLT entries.
#
# RUN: yaml2obj -format=elf %s > %t-obj
# RUN: lld -flavor gnu -target mipsel -shared --noinhibit-exec -o %t1-so %t-obj
# RUN: llvm-readobj -dt -r -s %t1-so | FileCheck -check-prefix=PLT-SYM %s

# PLT-SYM: Sections [
# PLT-SYM: Section {
# PLT-SYM-NOT: Name: .plt ({{[0-9]+}})
#
# PLT-SYM: Relocations [
# PLT-SYM-NEXT: Section (4) .rel.dyn {
# PLT-SYM-NEXT: 0x2000 R_MIPS_REL32 T1 0x0
# PLT-SYM-NEXT: 0x140 R_MIPS_REL32 T1 0x0
# PLT-SYM-NEXT: }
# PLT-SYM-NEXT: ]
#
# PLT-SYM: Name: T1@ (7)
# PLT-SYM-NEXT: Value: 0x0
# PLT-SYM-NEXT: Size: 0
# PLT-SYM-NEXT: Binding: Global (0x1)
# PLT-SYM-NEXT: Type: None (0x0)
# PLT-SYM-NEXT: Other: 0
# PLT-SYM-NEXT: Section: Undefined (0x0)

!ELF
FileHeader: !FileHeader
Class: ELFCLASS32
Data: ELFDATA2LSB
Type: ET_REL
Machine: EM_MIPS
Flags: [EF_MIPS_PIC, EF_MIPS_CPIC]

Sections:
- Name: .text
Type: SHT_PROGBITS
Content: "0000000000000000"
AddressAlign: 16
Flags: [SHF_EXECINSTR, SHF_ALLOC]

- Name: .data
Type: SHT_PROGBITS
Content: "0000000000000000"
AddressAlign: 16
Flags: [SHF_WRITE, SHF_ALLOC]

- Name: .rel.text
Type: SHT_REL
Info: .text
AddressAlign: 4
Relocations:
- Offset: 0x00
Symbol: T1
Type: R_MIPS_32

- Name: .rel.data
Type: SHT_REL
Info: .data
AddressAlign: 4
Relocations:
- Offset: 0x00
Symbol: T1
Type: R_MIPS_32

Symbols:
Global:
- Name: T0
Section: .text
Type: STT_FUNC
Value: 0x0
Size: 4
- Name: T1
- Name: D0
Section: .data
Type: STT_OBJECT
Value: 0x0
Size: 8
103 changes: 103 additions & 0 deletions lld/test/elf/Mips/rel-dynamic-03.test
View file
Original file line number Diff line number Diff line change
@@ -0,0 +1,103 @@
# REQUIRES: mips

# Conditions:
# a) Linking a non-shared executable file.
# b) Relocations' target is a symbol defined in the shared object.
# c) The target symbol is referenced by both branch (R_MIPS_26)
# and regular (R_MIPS_32) relocations.
# Check:
# a) There should be no R_MIPS_REL32 relocation.
# b) Linker creates a single PLT entry.
# c) STO_MIPS_PLT flag in the dynamic symbol table for symbols require
# a pointer equality.
#
# RUN: yaml2obj -format=elf %S/Inputs/pic-obj.yaml > %t-so-obj
# RUN: lld -flavor gnu -target mipsel -shared -o %t-so %t-so-obj
# RUN: yaml2obj -format=elf %s > %t-obj
# RUN: lld -flavor gnu -target mipsel -e T0 -o %t-exe %t-obj %t-so
# RUN: llvm-objdump -disassemble %t-exe | FileCheck -check-prefix=PLT %s
# RUN: llvm-readobj -dt -r %t-exe | FileCheck -check-prefix=PLT-SYM %s

# PLT: Disassembly of section .plt:
# PLT-NEXT: .plt:
# PLT-NEXT: 400170: 40 00 1c 3c lui $gp, 64
# PLT-NEXT: 400174: 00 20 99 8f lw $25, 8192($gp)
# PLT-NEXT: 400178: 00 20 9c 27 addiu $gp, $gp, 8192
# PLT-NEXT: 40017c: 23 c0 1c 03 subu $24, $24, $gp
# PLT-NEXT: 400180: 21 78 e0 03 move $15, $ra
# PLT-NEXT: 400184: 82 c0 18 00 srl $24, $24, 2
# PLT-NEXT: 400188: 09 f8 20 03 jalr $25
# PLT-NEXT: 40018c: fe ff 18 27 addiu $24, $24, -2
#
# PLT-NEXT: 400190: 40 00 0f 3c lui $15, 64
# PLT-NEXT: 400194: 08 20 f9 8d lw $25, 8200($15)
# PLT-NEXT: 400198: 08 00 20 03 jr $25
# PLT-NEXT: 40019c: 08 20 f8 25 addiu $24, $15, 8200
#
# PLT-SYM: Relocations [
# PLT-SYM-NEXT: Section (5) .rel.plt {
# PLT-SYM-NEXT: 0x402008 R_MIPS_JUMP_SLOT T1 0x0
# PLT-SYM-NEXT: }
# PLT-SYM-NEXT: ]

# PLT-SYM: Name: T1@ (1)
# PLT-SYM-NEXT: Value: 0x400190
# PLT-SYM-NEXT: Size: 0
# PLT-SYM-NEXT: Binding: Global (0x1)
# PLT-SYM-NEXT: Type: Function (0x2)
# PLT-SYM-NEXT: Other: 8
# PLT-SYM-NEXT: Section: Undefined (0x0)

!ELF
FileHeader: !FileHeader
Class: ELFCLASS32
Data: ELFDATA2LSB
Type: ET_REL
Machine: EM_MIPS
Flags: [EF_MIPS_CPIC]

Sections:
- Name: .text
Type: SHT_PROGBITS
Content: "0000000000000000"
AddressAlign: 16
Flags: [SHF_EXECINSTR, SHF_ALLOC]

- Name: .data
Type: SHT_PROGBITS
Content: "0000000000000000"
AddressAlign: 16
Flags: [SHF_WRITE, SHF_ALLOC]

- Name: .rel.text
Type: SHT_REL
Info: .text
AddressAlign: 4
Relocations:
- Offset: 0x04
Symbol: T1
Type: R_MIPS_26

- Name: .rel.data
Type: SHT_REL
Info: .data
AddressAlign: 4
Relocations:
- Offset: 0x04
Symbol: T1
Type: R_MIPS_32

Symbols:
Global:
- Name: T0
Section: .text
Type: STT_FUNC
Value: 0x0
Size: 8
- Name: T1
Type: STT_FUNC
- Name: D0
Section: .data
Type: STT_OBJECT
Value: 0x0
Size: 8
170 changes: 170 additions & 0 deletions lld/test/elf/Mips/rel-dynamic-04.test
View file
Original file line number Diff line number Diff line change
@@ -0,0 +1,170 @@
# Conditions:
# a) Linking a non-shared executable file.
# b) Relocations' targets are symbols defined in the shared object.
# c) Relocations modify a writable section.
# d) The first symbol is referenced by R_MIPS32 relocation only
# e) The second symbol is referenced by R_MIPS_32 and R_MIPS26 relocations.
# f) The third symbol is referenced by R_MIPS26 and R_MIPS_32 relocations.
# Check:
# a) There should be the only R_MIPS_REL32 relocation.
# b) Linker creates a couple of PLT entry for both symbols referenced
# by the R_MIPS_26 branch relocation.
# c) STO_MIPS_PLT flag in the dynamic symbol table for symbols require
# a pointer equality.
#
# RUN: yaml2obj -format=elf %S/Inputs/pic-obj.yaml > %t-so-obj
# RUN: lld -flavor gnu -target mipsel -shared -o %t-so %t-so-obj
# RUN: yaml2obj -format=elf %s > %t-obj
# RUN: lld -flavor gnu -target mipsel -e T0 -o %t1-exe %t-obj %t-so
# RUN: llvm-readobj -dt -r -s %t1-exe | FileCheck -check-prefix=PLT %s

# PLT: Section {
# PLT: Index: 5
# PLT-NEXT: Name: .rel.dyn (31)
# PLT-NEXT: Type: SHT_REL (0x9)
# PLT-NEXT: Flags [ (0x2)
# PLT-NEXT: SHF_ALLOC (0x2)
# PLT-NEXT: ]
# PLT-NEXT: Address: 0x40109C
# PLT-NEXT: Offset: 0x109C
# PLT-NEXT: Size: 8
# PLT-NEXT: Link: 3
# PLT-NEXT: Info: 0
# PLT-NEXT: AddressAlignment: 4
# PLT-NEXT: EntrySize: 8
# PLT-NEXT: }
# PLT-NEXT: Section {
# PLT-NEXT: Index: 6
# PLT-NEXT: Name: .rel.plt (40)
# PLT-NEXT: Type: SHT_REL (0x9)
# PLT-NEXT: Flags [ (0x2)
# PLT-NEXT: SHF_ALLOC (0x2)
# PLT-NEXT: ]
# PLT-NEXT: Address: 0x4010A4
# PLT-NEXT: Offset: 0x10A4
# PLT-NEXT: Size: 16
# PLT-NEXT: Link: 3
# PLT-NEXT: Info: 0
# PLT-NEXT: AddressAlignment: 4
# PLT-NEXT: EntrySize: 8
# PLT-NEXT: }
# PLT-NEXT: Section {
# PLT-NEXT: Index: 7
# PLT-NEXT: Name: .plt (49)
# PLT-NEXT: Type: SHT_PROGBITS (0x1)
# PLT-NEXT: Flags [ (0x6)
# PLT-NEXT: SHF_ALLOC (0x2)
# PLT-NEXT: SHF_EXECINSTR (0x4)
# PLT-NEXT: ]
# PLT-NEXT: Address: 0x4010C0
# PLT-NEXT: Offset: 0x10C0
# PLT-NEXT: Size: 64
# PLT-NEXT: Link: 0
# PLT-NEXT: Info: 0
# PLT-NEXT: AddressAlignment: 16
# PLT-NEXT: EntrySize: 0
# PLT-NEXT: }

# PLT: Relocations [
# PLT-NEXT: Section (5) .rel.dyn {
# PLT-NEXT: 0x400120 R_MIPS_REL32 T1 0x0
# PLT-NEXT: }
# PLT-NEXT: Section (6) .rel.plt {
# PLT-NEXT: 0x403008 R_MIPS_JUMP_SLOT T2 0x0
# PLT-NEXT: 0x40300C R_MIPS_JUMP_SLOT T3 0x0
# PLT-NEXT: }
# PLT-NEXT: ]

# PLT: DynamicSymbols [
# PLT-NEXT: Symbol {
# PLT-NEXT: Name: @ (0)
# PLT-NEXT: Value: 0x0
# PLT-NEXT: Size: 0
# PLT-NEXT: Binding: Local (0x0)
# PLT-NEXT: Type: None (0x0)
# PLT-NEXT: Other: 0
# PLT-NEXT: Section: Undefined (0x0)
# PLT-NEXT: }
# PLT-NEXT: Symbol {
# PLT-NEXT: Name: T2@ (1)
# PLT-NEXT: Value: 0x4010E0
# PLT-NEXT: Size: 0
# PLT-NEXT: Binding: Global (0x1)
# PLT-NEXT: Type: Function (0x2)
# PLT-NEXT: Other: 8
# PLT-NEXT: Section: Undefined (0x0)
# PLT-NEXT: }
# PLT-NEXT: Symbol {
# PLT-NEXT: Name: T3@ (4)
# PLT-NEXT: Value: 0x4010F0
# PLT-NEXT: Size: 0
# PLT-NEXT: Binding: Global (0x1)
# PLT-NEXT: Type: Function (0x2)
# PLT-NEXT: Other: 8
# PLT-NEXT: Section: Undefined (0x0)
# PLT-NEXT: }
# PLT-NEXT: Symbol {
# PLT-NEXT: Name: T1@ (7)
# PLT-NEXT: Value: 0x0
# PLT-NEXT: Size: 0
# PLT-NEXT: Binding: Global (0x1)
# PLT-NEXT: Type: Function (0x2)
# PLT-NEXT: Other: 0
# PLT-NEXT: Section: Undefined (0x0)
# PLT-NEXT: }
# PLT-NEXT: ]

!ELF
FileHeader: !FileHeader
Class: ELFCLASS32
Data: ELFDATA2LSB
Type: ET_REL
Machine: EM_MIPS
Flags: [EF_MIPS_CPIC]

Sections:
- Name: .text
Type: SHT_PROGBITS
Content: "0000000000000000"
AddressAlign: 16
Flags: [SHF_WRITE, SHF_EXECINSTR, SHF_ALLOC]

- Name: .rel.text
Type: SHT_REL
Info: .text
AddressAlign: 4
Relocations:
# There is no branch relocation for T1.
- Offset: 0x00
Symbol: T1
Type: R_MIPS_32
# The R_MIPS_32 relocation for T2 might produce R_MIPS_REL32 ...
- Offset: 0x00
Symbol: T2
Type: R_MIPS_32
# ... but R_MIPS_26 creates PLT entry and makes R_MIPS_REL32 redundant.
- Offset: 0x04
Symbol: T2
Type: R_MIPS_26
# Create PLT entry for T3 symbol.
- Offset: 0x00
Symbol: T3
Type: R_MIPS_26
# Take in account existing PLT entry and do not create R_MIPS_REL32.
- Offset: 0x04
Symbol: T3
Type: R_MIPS_32

Symbols:
Global:
- Name: T0
Section: .text
Type: STT_FUNC
Value: 0x0
Size: 8
- Name: T1
Type: STT_FUNC
- Name: T2
Type: STT_FUNC
- Name: T3
Type: STT_FUNC
152 changes: 152 additions & 0 deletions lld/test/elf/Mips/rel-dynamic-05.test
View file
Original file line number Diff line number Diff line change
@@ -0,0 +1,152 @@
# Conditions:
# a) Linking a non-shared executable file.
# b) Relocations' targets are symbols defined in the shared object.
# c) Relocations modify a read-only section.
# d) The first symbol is referenced by R_MIPS32 relocation only
# e) The second symbol is referenced by R_MIPS_32 and R_MIPS26 relocations.
# f) The third symbol is referenced by R_MIPS26 and R_MIPS_32 relocations.
# Check:
# a) There should be no R_MIPS_REL32 relocations.
# b) Linker creates PLT entries for all three relocations.
# c) STO_MIPS_PLT flag in the dynamic symbol table for symbols require
# a pointer equality.
#
# RUN: yaml2obj -format=elf %S/Inputs/pic-obj.yaml > %t-so-obj
# RUN: lld -flavor gnu -target mipsel -shared -o %t-so %t-so-obj
# RUN: yaml2obj -format=elf %s > %t-obj
# RUN: lld -flavor gnu -target mipsel -e T0 -o %t1-exe %t-obj %t-so
# RUN: llvm-readobj -dt -r -s %t1-exe | FileCheck -check-prefix=PLT %s

# PLT: Section {
# PLT: Index: 5
# PLT-NEXT: Name: .rel.plt (31)
# PLT-NEXT: Type: SHT_REL (0x9)
# PLT-NEXT: Flags [ (0x2)
# PLT-NEXT: SHF_ALLOC (0x2)
# PLT-NEXT: ]
# PLT-NEXT: Address: 0x40019C
# PLT-NEXT: Offset: 0x19C
# PLT-NEXT: Size: 24
# PLT-NEXT: Link: 3
# PLT-NEXT: Info: 0
# PLT-NEXT: AddressAlignment: 4
# PLT-NEXT: EntrySize: 8
# PLT-NEXT: }
# PLT-NEXT: Section {
# PLT-NEXT: Index: 6
# PLT-NEXT: Name: .plt (40)
# PLT-NEXT: Type: SHT_PROGBITS (0x1)
# PLT-NEXT: Flags [ (0x6)
# PLT-NEXT: SHF_ALLOC (0x2)
# PLT-NEXT: SHF_EXECINSTR (0x4)
# PLT-NEXT: ]
# PLT-NEXT: Address: 0x4001C0
# PLT-NEXT: Offset: 0x1C0
# PLT-NEXT: Size: 80
# PLT-NEXT: Link: 0
# PLT-NEXT: Info: 0
# PLT-NEXT: AddressAlignment: 16
# PLT-NEXT: EntrySize: 0
# PLT-NEXT: }

# PLT: Relocations [
# PLT-NEXT: Section (5) .rel.plt {
# PLT-NEXT: 0x402008 R_MIPS_JUMP_SLOT T1 0x0
# PLT-NEXT: 0x40200C R_MIPS_JUMP_SLOT T2 0x0
# PLT-NEXT: 0x402010 R_MIPS_JUMP_SLOT T3 0x0
# PLT-NEXT: }
# PLT-NEXT: ]

# PLT: DynamicSymbols [
# PLT-NEXT: Symbol {
# PLT-NEXT: Name: @ (0)
# PLT-NEXT: Value: 0x0
# PLT-NEXT: Size: 0
# PLT-NEXT: Binding: Local (0x0)
# PLT-NEXT: Type: None (0x0)
# PLT-NEXT: Other: 0
# PLT-NEXT: Section: Undefined (0x0)
# PLT-NEXT: }
# PLT-NEXT: Symbol {
# PLT-NEXT: Name: T2@ (1)
# PLT-NEXT: Value: 0x4001F0
# PLT-NEXT: Size: 0
# PLT-NEXT: Binding: Global (0x1)
# PLT-NEXT: Type: Function (0x2)
# PLT-NEXT: Other: 8
# PLT-NEXT: Section: Undefined (0x0)
# PLT-NEXT: }
# PLT-NEXT: Symbol {
# PLT-NEXT: Name: T3@ (4)
# PLT-NEXT: Value: 0x400200
# PLT-NEXT: Size: 0
# PLT-NEXT: Binding: Global (0x1)
# PLT-NEXT: Type: Function (0x2)
# PLT-NEXT: Other: 8
# PLT-NEXT: Section: Undefined (0x0)
# PLT-NEXT: }
# PLT-NEXT: Symbol {
# PLT-NEXT: Name: T1@ (7)
# PLT-NEXT: Value: 0x4001E0
# PLT-NEXT: Size: 0
# PLT-NEXT: Binding: Global (0x1)
# PLT-NEXT: Type: Function (0x2)
# PLT-NEXT: Other: 8
# PLT-NEXT: Section: Undefined (0x0)
# PLT-NEXT: }
# PLT-NEXT: ]

!ELF
FileHeader: !FileHeader
Class: ELFCLASS32
Data: ELFDATA2LSB
Type: ET_REL
Machine: EM_MIPS
Flags: [EF_MIPS_CPIC]

Sections:
- Name: .text
Type: SHT_PROGBITS
Content: "0000000000000000"
AddressAlign: 16
Flags: [SHF_EXECINSTR, SHF_ALLOC]

- Name: .rel.text
Type: SHT_REL
Info: .text
AddressAlign: 4
Relocations:
# There is no branch relocation for T1.
- Offset: 0x00
Symbol: T1
Type: R_MIPS_32
# The R_MIPS_32 relocation for T2 might produce R_MIPS_REL32 ...
- Offset: 0x00
Symbol: T2
Type: R_MIPS_32
# ... but R_MIPS_26 creates PLT entry and makes R_MIPS_REL32 redundant.
- Offset: 0x04
Symbol: T2
Type: R_MIPS_26
# Create PLT entry for T3 symbol.
- Offset: 0x00
Symbol: T3
Type: R_MIPS_26
# Take in account existing PLT entry and do not create R_MIPS_REL32.
- Offset: 0x04
Symbol: T3
Type: R_MIPS_32

Symbols:
Global:
- Name: T0
Section: .text
Type: STT_FUNC
Value: 0x0
Size: 8
- Name: T1
Type: STT_FUNC
- Name: T2
Type: STT_FUNC
- Name: T3
Type: STT_FUNC
103 changes: 103 additions & 0 deletions lld/test/elf/Mips/rel-dynamic-06.test
View file
Original file line number Diff line number Diff line change
@@ -0,0 +1,103 @@
# Conditions:
# a) Linking a shared library.
# b) The first relocation modifies a regular .text section.
# c) The second relocation modifies a .pdr section without SHF_ALLOC flag.
# Check:
# a) There should be no PLT entries.
# b) Linker creates a single R_MIPS_REL32 relocation.
#
# RUN: yaml2obj -format=elf %s > %t-obj
# RUN: lld -flavor gnu -target mipsel -shared -o %t1-so %t-obj
# RUN: llvm-readobj -dt -r -s %t1-so | FileCheck -check-prefix=PLT1 %s

# PLT1-SYM: Sections [
# PLT1-SYM: Section {
# PLT1-SYM-NOT: Name: .plt ({{[0-9]+}})

# PLT1: Relocations [
# PLT1-NEXT: Section (4) .rel.dyn {
# PLT1-NEXT: 0x100 R_MIPS_REL32 T0 0x0
# PLT1-NEXT: }
# PLT1-NEXT: ]

# PLT1: DynamicSymbols [
# PLT1-NEXT: Symbol {
# PLT1-NEXT: Name: @ (0)
# PLT1-NEXT: Value: 0x0
# PLT1-NEXT: Size: 0
# PLT1-NEXT: Binding: Local (0x0)
# PLT1-NEXT: Type: None (0x0)
# PLT1-NEXT: Other: 0
# PLT1-NEXT: Section: Undefined (0x0)
# PLT1-NEXT: }
# PLT1-NEXT: Symbol {
# PLT1-NEXT: Name: T1@ (4)
# PLT1-NEXT: Value: 0x104
# PLT1-NEXT: Size: 4
# PLT1-NEXT: Binding: Global (0x1)
# PLT1-NEXT: Type: Function (0x2)
# PLT1-NEXT: Other: 0
# PLT1-NEXT: Section: .text (0x5)
# PLT1-NEXT: }
# PLT1-NEXT: Symbol {
# PLT1-NEXT: Name: T0@ (1)
# PLT1-NEXT: Value: 0x100
# PLT1-NEXT: Size: 4
# PLT1-NEXT: Binding: Global (0x1)
# PLT1-NEXT: Type: Function (0x2)
# PLT1-NEXT: Other: 0
# PLT1-NEXT: Section: .text (0x5)
# PLT1-NEXT: }
# PLT1-NEXT: ]

!ELF
FileHeader: !FileHeader
Class: ELFCLASS32
Data: ELFDATA2LSB
Type: ET_REL
Machine: EM_MIPS
Flags: [EF_MIPS_PIC, EF_MIPS_CPIC]

Sections:
- Name: .text
Type: SHT_PROGBITS
Content: "0000000000000000"
AddressAlign: 16
Flags: [SHF_EXECINSTR, SHF_ALLOC]

- Name: .rel.text
Type: SHT_REL
Info: .text
AddressAlign: 4
Relocations:
- Offset: 0x00
Symbol: T0
Type: R_MIPS_32

- Name: .pdr
Type: SHT_PROGBITS
Content: "0000000000000000"
AddressAlign: 16
Flags: []

- Name: .rel.pdr
Type: SHT_REL
Info: .pdr
AddressAlign: 4
Relocations:
- Offset: 0x00
Symbol: T1
Type: R_MIPS_32

Symbols:
Global:
- Name: T0
Section: .text
Type: STT_FUNC
Value: 0x0
Size: 4
- Name: T1
Section: .text
Type: STT_FUNC
Value: 0x4
Size: 4
230 changes: 230 additions & 0 deletions lld/test/elf/Mips/rel-dynamic-07.test
View file
Original file line number Diff line number Diff line change
@@ -0,0 +1,230 @@
# Conditions:
# a) Linking a shared library.
# b) There ars multiple R_MIPS_32 relocations with various targets.
# Check:
# a) Emitting of R_MIPS_REL32 relocations.
# b) There should be no R_MIPS_REL32 relocations for the _gp_disp symbol.
#
# RUN: yaml2obj -format=elf %S/Inputs/pic-obj.yaml > %t-so-obj
# RUN: lld -flavor gnu -target mipsel -shared -o %t-so %t-so-obj
# RUN: yaml2obj -format=elf %s > %t-obj
# RUN: lld -flavor gnu -target mipsel -shared --noinhibit-exec \
# RUN: -o %t1-so %t-obj %t-so
# RUN: llvm-readobj -dt -r -sections %t1-so | FileCheck %s

# CHECK: Sections [
# CHECK: Section {
# CHECK-NOT: Name: .plt ({{[0-9]+}})

# CHECK: Relocations [
# CHECK-NEXT: Section (4) .rel.dyn {
# CHECK-NEXT: 0x2000 R_MIPS_REL32 T0 0x0
# CHECK-NEXT: 0x2000 R_MIPS_REL32 T4 0x0
# CHECK-NEXT: 0x2000 R_MIPS_REL32 D2 0x0
# CHECK-NEXT: 0x2004 R_MIPS_REL32 T1 0x0
# CHECK-NEXT: 0x2008 R_MIPS_REL32 T2 0x0
# CHECK-NEXT: 0x2004 R_MIPS_REL32 D0 0x0
# CHECK-NEXT: 0x2008 R_MIPS_REL32 D1 0x0
# CHECK-NEXT: 0x2004 R_MIPS_REL32 D4 0x0
# CHECK-NEXT: 0x2008 R_MIPS_REL32 U1 0x0
# CHECK-NEXT: }
# CHECK-NEXT: ]

# CHECK: DynamicSymbols [
# CHECK-NEXT: Symbol {
# CHECK-NEXT: Name: @ (0)
# CHECK-NEXT: Value: 0x0
# CHECK-NEXT: Size: 0
# CHECK-NEXT: Binding: Local (0x0)
# CHECK-NEXT: Type: None (0x0)
# CHECK-NEXT: Other: 0
# CHECK-NEXT: Section: Undefined (0x0)
# CHECK-NEXT: }
# CHECK-NEXT: Symbol {
# CHECK-NEXT: Name: T0@ (1)
# CHECK-NEXT: Value: 0x224
# CHECK-NEXT: Size: 8
# CHECK-NEXT: Binding: Global (0x1)
# CHECK-NEXT: Type: Function (0x2)
# CHECK-NEXT: Other: 0
# CHECK-NEXT: Section: .text (0x5)
# CHECK-NEXT: }
# CHECK-NEXT: Symbol {
# CHECK-NEXT: Name: T4@ (7)
# CHECK-NEXT: Value: 0x0
# CHECK-NEXT: Size: 0
# CHECK-NEXT: Binding: Global (0x1)
# CHECK-NEXT: Type: None (0x0)
# CHECK-NEXT: Other: 0
# CHECK-NEXT: Section: Undefined (0x0)
# CHECK-NEXT: }
# CHECK-NEXT: Symbol {
# CHECK-NEXT: Name: D2@ (25)
# CHECK-NEXT: Value: 0x0
# CHECK-NEXT: Size: 4
# CHECK-NEXT: Binding: Global (0x1)
# CHECK-NEXT: Type: Object (0x1)
# CHECK-NEXT: Other: 0
# CHECK-NEXT: Section: Undefined (0x0)
# CHECK-NEXT: }
# CHECK-NEXT: Symbol {
# CHECK-NEXT: Name: T1@ (16)
# CHECK-NEXT: Value: 0x0
# CHECK-NEXT: Size: 0
# CHECK-NEXT: Binding: Global (0x1)
# CHECK-NEXT: Type: Function (0x2)
# CHECK-NEXT: Other: 0
# CHECK-NEXT: Section: Undefined (0x0)
# CHECK-NEXT: }
# CHECK-NEXT: Symbol {
# CHECK-NEXT: Name: T2@ (19)
# CHECK-NEXT: Value: 0x0
# CHECK-NEXT: Size: 0
# CHECK-NEXT: Binding: Global (0x1)
# CHECK-NEXT: Type: Function (0x2)
# CHECK-NEXT: Other: 0
# CHECK-NEXT: Section: Undefined (0x0)
# CHECK-NEXT: }
# CHECK-NEXT: Symbol {
# CHECK-NEXT: Name: D0@ (4)
# CHECK-NEXT: Value: 0x2004
# CHECK-NEXT: Size: 8
# CHECK-NEXT: Binding: Global (0x1)
# CHECK-NEXT: Type: Object (0x1)
# CHECK-NEXT: Other: 0
# CHECK-NEXT: Section: .data (0x8)
# CHECK-NEXT: }
# CHECK-NEXT: Symbol {
# CHECK-NEXT: Name: D1@ (22)
# CHECK-NEXT: Value: 0x0
# CHECK-NEXT: Size: 4
# CHECK-NEXT: Binding: Global (0x1)
# CHECK-NEXT: Type: Object (0x1)
# CHECK-NEXT: Other: 0
# CHECK-NEXT: Section: Undefined (0x0)
# CHECK-NEXT: }
# CHECK-NEXT: Symbol {
# CHECK-NEXT: Name: D4@ (10)
# CHECK-NEXT: Value: 0x0
# CHECK-NEXT: Size: 0
# CHECK-NEXT: Binding: Global (0x1)
# CHECK-NEXT: Type: None (0x0)
# CHECK-NEXT: Other: 0
# CHECK-NEXT: Section: Undefined (0x0)
# CHECK-NEXT: }
# CHECK-NEXT: Symbol {
# CHECK-NEXT: Name: U1@ (13)
# CHECK-NEXT: Value: 0x0
# CHECK-NEXT: Size: 0
# CHECK-NEXT: Binding: Global (0x1)
# CHECK-NEXT: Type: None (0x0)
# CHECK-NEXT: Other: 0
# CHECK-NEXT: Section: Undefined (0x0)
# CHECK-NEXT: }
# CHECK-NEXT: ]

!ELF
FileHeader: !FileHeader
Class: ELFCLASS32
Data: ELFDATA2LSB
Type: ET_REL
Machine: EM_MIPS
Flags: [EF_MIPS_PIC, EF_MIPS_CPIC]

Sections:
- Name: .text
Type: SHT_PROGBITS
Content: "000000000000000000000000"
AddressAlign: 16
Flags: [SHF_EXECINSTR, SHF_ALLOC]

- Name: .data
Type: SHT_PROGBITS
Content: "000000000000000000000000"
AddressAlign: 16
Flags: [SHF_WRITE, SHF_ALLOC]

- Name: .rel.text
Type: SHT_REL
Info: .text
AddressAlign: 4
Relocations:
- Offset: 0x00
Symbol: _gp_disp
Type: R_MIPS_HI16
- Offset: 0x00
Symbol: _gp_disp
Type: R_MIPS_LO16

- Name: .rel.data
Type: SHT_REL
Info: .data
AddressAlign: 4
Relocations:
- Offset: 0x00 # T0 is a defined function
Symbol: T0
Type: R_MIPS_32
- Offset: 0x04 # T1 is a function from shared lib
Symbol: T1
Type: R_MIPS_32
- Offset: 0x08 # T2 has unknown type and defined in shared lib
Symbol: T2
Type: R_MIPS_32
- Offset: 0x00 # T4 is an undefined function
Symbol: T4
Type: R_MIPS_32
- Offset: 0x04 # D0 is a defined data object
Symbol: D0
Type: R_MIPS_32
- Offset: 0x08 # D1 is a data object from shared lib
Symbol: D1
Type: R_MIPS_32
- Offset: 0x00 # D2 has unknown type and defined in shared lib
Symbol: D2
Type: R_MIPS_32
- Offset: 0x04 # D4 is an undefined data object
Symbol: D4
Type: R_MIPS_32
- Offset: 0x08 # U1 is undefined and has unknown type
Symbol: U1
Type: R_MIPS_32

Symbols:
Local:
- Name: LT0
Section: .text
Type: STT_FUNC
Value: 0x0
Size: 4
- Name: LD0
Section: .data
Type: STT_OBJECT
Value: 0x0
Size: 4

Global:
- Name: _gp_disp
Type: STT_OBJECT

- Name: T0
Section: .text
Type: STT_FUNC
Value: 0x4
Size: 8
- Name: T1
Type: STT_FUNC
- Name: T2
- Name: T4
Type: STT_FUNC

- Name: D0
Section: .data
Type: STT_OBJECT
Value: 0x4
Size: 8
- Name: D1
Type: STT_OBJECT
- Name: D2
- Name: D4
Type: STT_OBJECT
- Name: U1
186 changes: 186 additions & 0 deletions lld/test/elf/Mips/rel-dynamic-08.test
View file
Original file line number Diff line number Diff line change
@@ -0,0 +1,186 @@
# Conditions:
# a) Linking a non-shared executable file.
# b) There ars multiple R_MIPS_32/R_MIPS_HI16/R_MIPS_LO16 relocations
# with various targets.
# Check:
# a) Emitting of R_MIPS_REL32 relocations.
#
# RUN: yaml2obj -format=elf %S/Inputs/pic-obj.yaml > %t-so-obj
# RUN: lld -flavor gnu -target mipsel -shared -o %t-so %t-so-obj
# RUN: yaml2obj -format=elf %s > %t-obj
# RUN: lld -flavor gnu -target mipsel -e T0 --noinhibit-exec \
# RUN: -o %t1-exe %t-obj %t-so
# RUN: llvm-readobj -dt -r -sections %t1-exe | FileCheck %s

# CHECK: Sections [
# CHECK: Section {
# CHECK-NOT: Name: .plt ({{[0-9]+}})

# CHECK: Relocations [
# CHECK-NEXT: Section (5) .rel.dyn {
# CHECK-NEXT: 0x402000 R_MIPS_REL32 D2 0x0
# CHECK-NEXT: 0x402004 R_MIPS_REL32 T1 0x0
# CHECK-NEXT: 0x402008 R_MIPS_REL32 T2 0x0
# CHECK-NEXT: 0x402008 R_MIPS_REL32 D1 0x0
# CHECK-NEXT: }
# CHECK-NEXT: ]

# CHECK: DynamicSymbols [
# CHECK-NEXT: Symbol {
# CHECK-NEXT: Name: @ (0)
# CHECK-NEXT: Value: 0x0
# CHECK-NEXT: Size: 0
# CHECK-NEXT: Binding: Local (0x0)
# CHECK-NEXT: Type: None (0x0)
# CHECK-NEXT: Other: 0
# CHECK-NEXT: Section: Undefined (0x0)
# CHECK-NEXT: }
# CHECK-NEXT: Symbol {
# CHECK-NEXT: Name: D2@ (10)
# CHECK-NEXT: Value: 0x0
# CHECK-NEXT: Size: 4
# CHECK-NEXT: Binding: Global (0x1)
# CHECK-NEXT: Type: Object (0x1)
# CHECK-NEXT: Other: 0
# CHECK-NEXT: Section: Undefined (0x0)
# CHECK-NEXT: }
# CHECK-NEXT: Symbol {
# CHECK-NEXT: Name: T1@ (4)
# CHECK-NEXT: Value: 0x0
# CHECK-NEXT: Size: 0
# CHECK-NEXT: Binding: Global (0x1)
# CHECK-NEXT: Type: Function (0x2)
# CHECK-NEXT: Other: 0
# CHECK-NEXT: Section: Undefined (0x0)
# CHECK-NEXT: }
# CHECK-NEXT: Symbol {
# CHECK-NEXT: Name: T2@ (1)
# CHECK-NEXT: Value: 0x0
# CHECK-NEXT: Size: 0
# CHECK-NEXT: Binding: Global (0x1)
# CHECK-NEXT: Type: Function (0x2)
# CHECK-NEXT: Other: 0
# CHECK-NEXT: Section: Undefined (0x0)
# CHECK-NEXT: }
# CHECK-NEXT: Symbol {
# CHECK-NEXT: Name: D1@ (7)
# CHECK-NEXT: Value: 0x0
# CHECK-NEXT: Size: 4
# CHECK-NEXT: Binding: Global (0x1)
# CHECK-NEXT: Type: Object (0x1)
# CHECK-NEXT: Other: 0
# CHECK-NEXT: Section: Undefined (0x0)
# CHECK-NEXT: }
# CHECK-NEXT: ]

!ELF
FileHeader: !FileHeader
Class: ELFCLASS32
Data: ELFDATA2LSB
Type: ET_REL
Machine: EM_MIPS
Flags: [EF_MIPS_CPIC]

Sections:
- Name: .text
Type: SHT_PROGBITS
Content: "000000000000000000000000"
AddressAlign: 16
Flags: [SHF_EXECINSTR, SHF_ALLOC]

- Name: .data
Type: SHT_PROGBITS
Content: "000000000000000000000000"
AddressAlign: 16
Flags: [SHF_WRITE, SHF_ALLOC]

- Name: .rel.text
Type: SHT_REL
Info: .text
AddressAlign: 4
Relocations:
- Offset: 0x00
Symbol: _gp_disp
Type: R_MIPS_HI16
- Offset: 0x00
Symbol: _gp_disp
Type: R_MIPS_LO16

- Name: .rel.data
Type: SHT_REL
Info: .data
AddressAlign: 4
Relocations:
- Offset: 0x00 # LT0 is a locally defined function
Symbol: LT0
Type: R_MIPS_32
- Offset: 0x00 # LD0 is a locally defined data object
Symbol: LD0
Type: R_MIPS_32
- Offset: 0x00 # T0 is a defined function
Symbol: T0
Type: R_MIPS_32
- Offset: 0x04 # T1 is a function from shared lib
Symbol: T1
Type: R_MIPS_32
- Offset: 0x08 # T2 has unknown type and defined in shared lib
Symbol: T2
Type: R_MIPS_32
- Offset: 0x00 # T4 is an undefined function
Symbol: T4
Type: R_MIPS_32
- Offset: 0x04 # D0 is a defined data object
Symbol: D0
Type: R_MIPS_32
- Offset: 0x08 # D1 is a data object from shared lib
Symbol: D1
Type: R_MIPS_32
- Offset: 0x00 # D2 has unknown type and defined in shared lib
Symbol: D2
Type: R_MIPS_32
- Offset: 0x04 # D4 is an undefined data object
Symbol: D4
Type: R_MIPS_32
- Offset: 0x08 # U1 is undefined and has unknown type
Symbol: U1
Type: R_MIPS_32

Symbols:
Local:
- Name: LT0
Section: .text
Type: STT_FUNC
Value: 0x0
Size: 4
- Name: LD0
Section: .data
Type: STT_OBJECT
Value: 0x0
Size: 4

Global:
- Name: _gp_disp
Type: STT_OBJECT

- Name: T0
Section: .text
Type: STT_FUNC
Value: 0x4
Size: 8
- Name: T1
Type: STT_FUNC
- Name: T2
- Name: T4
Type: STT_FUNC

- Name: D0
Section: .data
Type: STT_OBJECT
Value: 0x4
Size: 8
- Name: D1
Type: STT_OBJECT
- Name: D2
- Name: D4
Type: STT_OBJECT
- Name: U1
107 changes: 107 additions & 0 deletions lld/test/elf/Mips/rel-dynamic-09.test
View file
Original file line number Diff line number Diff line change
@@ -0,0 +1,107 @@
# Conditions:
# a) Linking a non-shared executable file.
# b) Relocations' targets are undefined symbols.
# Check:
# a) There should be no dynamic relocations.
# b) There should be no PLT entries.
#
# RUN: yaml2obj -format=elf %s > %t-obj
# RUN: lld -flavor gnu -target mipsel --noinhibit-exec -e T0 -o %t2-exe %t-obj
# RUN: llvm-readobj -dt -r -s %t2-exe | FileCheck -check-prefix=PLT-SYM %s

# PLT-SYM: Sections [
# PLT-SYM: Section {
# PLT-SYM-NOT: Name: .plt ({{[0-9]+}})

# PLT-SYM: Relocations [
# PLT-SYM-NEXT: ]

# PLT-SYM: DynamicSymbols [
# PLT-SYM-NEXT: Symbol {
# PLT-SYM-NEXT: Name: @ (0)
# PLT-SYM-NEXT: Value: 0x0
# PLT-SYM-NEXT: Size: 0
# PLT-SYM-NEXT: Binding: Local (0x0)
# PLT-SYM-NEXT: Type: None (0x0)
# PLT-SYM-NEXT: Other: 0
# PLT-SYM-NEXT: Section: Undefined (0x0)
# PLT-SYM-NEXT: }
# PLT-SYM-NEXT: ]

!ELF
FileHeader: !FileHeader
Class: ELFCLASS32
Data: ELFDATA2LSB
Type: ET_REL
Machine: EM_MIPS
Flags: [EF_MIPS_CPIC]

Sections:
- Name: .text
Type: SHT_PROGBITS
Content: "0000000000000000"
AddressAlign: 16
Flags: [SHF_EXECINSTR, SHF_ALLOC]

- Name: .data
Type: SHT_PROGBITS
Content: "0000000000000000"
AddressAlign: 16
Flags: [SHF_WRITE, SHF_ALLOC]

- Name: .rel.text
Type: SHT_REL
Info: .text
AddressAlign: 4
Relocations:
- Offset: 0x04
Symbol: T3
Type: R_MIPS_26

- Name: .rel.data
Type: SHT_REL
Info: .data
AddressAlign: 4
Relocations:
- Offset: 0x00
Symbol: T1
Type: R_MIPS_HI16
- Offset: 0x00
Symbol: T1
Type: R_MIPS_LO16
- Offset: 0x04
Symbol: T2
Type: R_MIPS_32

- Offset: 0x04
Symbol: D1
Type: R_MIPS_HI16
- Offset: 0x04
Symbol: D1
Type: R_MIPS_LO16
- Offset: 0x04
Symbol: D2
Type: R_MIPS_32

Symbols:
Global:
- Name: T0
Section: .text
Type: STT_FUNC
Value: 0x0
Size: 8
- Name: T1
Type: STT_FUNC
- Name: T2
Type: STT_FUNC
- Name: T3
Type: STT_FUNC
- Name: D0
Section: .data
Type: STT_OBJECT
Value: 0x0
Size: 8
- Name: D1
Type: STT_OBJECT
- Name: D2
Type: STT_OBJECT
108 changes: 108 additions & 0 deletions lld/test/elf/Mips/rel-dynamic-10.test
View file
Original file line number Diff line number Diff line change
@@ -0,0 +1,108 @@
# Conditions:
# a) Linking a non-shared executable file.
# b) Relocations' targets are symbols defined in the other object.
# Check:
# a) There should be no dynamic relocations.
# b) There should be no PLT entries.
#
# RUN: yaml2obj -format=elf %s > %t-obj1
# RUN: yaml2obj -format=elf %S/Inputs/pic-obj.yaml > %t-obj2
# RUN: lld -flavor gnu -target mipsel -e T0 -o %t3-exe %t-obj1 %t-obj2
# RUN: llvm-readobj -dt -r -s %t3-exe | FileCheck -check-prefix=PLT-SYM %s

# PLT-SYM: Sections [
# PLT-SYM: Section {
# PLT-SYM-NOT: Name: .plt ({{[0-9]+}})

# PLT-SYM: Relocations [
# PLT-SYM-NEXT: ]

# PLT-SYM: DynamicSymbols [
# PLT-SYM-NEXT: Symbol {
# PLT-SYM-NEXT: Name: @ (0)
# PLT-SYM-NEXT: Value: 0x0
# PLT-SYM-NEXT: Size: 0
# PLT-SYM-NEXT: Binding: Local (0x0)
# PLT-SYM-NEXT: Type: None (0x0)
# PLT-SYM-NEXT: Other: 0
# PLT-SYM-NEXT: Section: Undefined (0x0)
# PLT-SYM-NEXT: }
# PLT-SYM-NEXT: ]

!ELF
FileHeader: !FileHeader
Class: ELFCLASS32
Data: ELFDATA2LSB
Type: ET_REL
Machine: EM_MIPS
Flags: [EF_MIPS_CPIC]

Sections:
- Name: .text
Type: SHT_PROGBITS
Content: "0000000000000000"
AddressAlign: 16
Flags: [SHF_EXECINSTR, SHF_ALLOC]

- Name: .data
Type: SHT_PROGBITS
Content: "0000000000000000"
AddressAlign: 16
Flags: [SHF_WRITE, SHF_ALLOC]

- Name: .rel.text
Type: SHT_REL
Info: .text
AddressAlign: 4
Relocations:
- Offset: 0x04
Symbol: T3
Type: R_MIPS_26

- Name: .rel.data
Type: SHT_REL
Info: .data
AddressAlign: 4
Relocations:
- Offset: 0x00
Symbol: T1
Type: R_MIPS_HI16
- Offset: 0x00
Symbol: T1
Type: R_MIPS_LO16
- Offset: 0x04
Symbol: T2
Type: R_MIPS_32

- Offset: 0x04
Symbol: D1
Type: R_MIPS_HI16
- Offset: 0x04
Symbol: D1
Type: R_MIPS_LO16
- Offset: 0x04
Symbol: D2
Type: R_MIPS_32

Symbols:
Global:
- Name: T0
Section: .text
Type: STT_FUNC
Value: 0x0
Size: 8
- Name: T1
Type: STT_FUNC
- Name: T2
Type: STT_FUNC
- Name: T3
Type: STT_FUNC
- Name: D0
Section: .data
Type: STT_OBJECT
Value: 0x0
Size: 8
- Name: D1
Type: STT_OBJECT
- Name: D2
Type: STT_OBJECT
84 changes: 84 additions & 0 deletions lld/test/elf/Mips/rel-dynamic-11.test
View file
Original file line number Diff line number Diff line change
@@ -0,0 +1,84 @@
# Conditions:
# a) Linking a shared library.
# b) Relocations' targets are symbols defined in the other shared object.
# Check:
# a) Emitting R_MIPS_REL32 relocations for both symbols.
# b) There should be no PLT entries.
#
# RUN: yaml2obj -format=elf %S/Inputs/pic-obj.yaml > %t-so-obj
# RUN: lld -flavor gnu -target mipsel -shared -o %t-so %t-so-obj
# RUN: yaml2obj -format=elf %s > %t-obj
# RUN: lld -flavor gnu -target mipsel -shared -o %t2-so %t-obj %t-so
# RUN: llvm-readobj -dt -r -s %t2-so | FileCheck -check-prefix=PLT-SYM %s

# PLT-SYM: Sections [
# PLT-SYM: Section {
# PLT-SYM-NOT: Name: .plt ({{[0-9]+}})
#
# PLT-SYM: Relocations [
# PLT-SYM-NEXT: Section (4) .rel.dyn {
# PLT-SYM-NEXT: 0x2000 R_MIPS_REL32 T1 0x0
# PLT-SYM-NEXT: 0x160 R_MIPS_REL32 T1 0x0
# PLT-SYM-NEXT: }
# PLT-SYM-NEXT: ]
#
# PLT-SYM: Name: T1@ (7)
# PLT-SYM-NEXT: Value: 0x0
# PLT-SYM-NEXT: Size: 0
# PLT-SYM-NEXT: Binding: Global (0x1)
# PLT-SYM-NEXT: Type: Function (0x2)
# PLT-SYM-NEXT: Other: 0
# PLT-SYM-NEXT: Section: Undefined (0x0)

!ELF
FileHeader: !FileHeader
Class: ELFCLASS32
Data: ELFDATA2LSB
Type: ET_REL
Machine: EM_MIPS
Flags: [EF_MIPS_PIC, EF_MIPS_CPIC]

Sections:
- Name: .text
Type: SHT_PROGBITS
Content: "0000000000000000"
AddressAlign: 16
Flags: [SHF_EXECINSTR, SHF_ALLOC]

- Name: .data
Type: SHT_PROGBITS
Content: "0000000000000000"
AddressAlign: 16
Flags: [SHF_WRITE, SHF_ALLOC]

- Name: .rel.text
Type: SHT_REL
Info: .text
AddressAlign: 4
Relocations:
- Offset: 0x00
Symbol: T1
Type: R_MIPS_32

- Name: .rel.data
Type: SHT_REL
Info: .data
AddressAlign: 4
Relocations:
- Offset: 0x00
Symbol: T1
Type: R_MIPS_32

Symbols:
Global:
- Name: T0
Section: .text
Type: STT_FUNC
Value: 0x0
Size: 4
- Name: T1
- Name: D0
Section: .data
Type: STT_OBJECT
Value: 0x0
Size: 8