Index: llvm/include/llvm/ObjectYAML/ELFYAML.h =================================================================== --- llvm/include/llvm/ObjectYAML/ELFYAML.h +++ llvm/include/llvm/ObjectYAML/ELFYAML.h @@ -481,7 +481,7 @@ // top-level key, which automatically ensures that invariants like there // being a single SHT_SYMTAB section are upheld. Optional> Symbols; - std::vector DynamicSymbols; + Optional> DynamicSymbols; std::vector
getSections() { std::vector
Ret; Index: llvm/lib/ObjectYAML/ELFEmitter.cpp =================================================================== --- llvm/lib/ObjectYAML/ELFEmitter.cpp +++ llvm/lib/ObjectYAML/ELFEmitter.cpp @@ -248,7 +248,7 @@ ImplicitSections.push_back(".symtab"); ImplicitSections.insert(ImplicitSections.end(), {".strtab", ".shstrtab"}); - if (!Doc.DynamicSymbols.empty()) + if (Doc.DynamicSymbols) ImplicitSections.insert(ImplicitSections.end(), {".dynsym", ".dynstr"}); // Insert placeholders for implicit sections that are not @@ -562,21 +562,24 @@ ArrayRef Symbols; if (IsStatic && Doc.Symbols) Symbols = *Doc.Symbols; - else if (!IsStatic) - Symbols = Doc.DynamicSymbols; + else if (!IsStatic && Doc.DynamicSymbols) + Symbols = *Doc.DynamicSymbols; ELFYAML::RawContentSection *RawSec = dyn_cast_or_null(YAMLSec); - if (RawSec && !Symbols.empty() && (RawSec->Content || RawSec->Size)) { - if (RawSec->Content) - reportError("cannot specify both `Content` and " + - (IsStatic ? Twine("`Symbols`") : Twine("`DynamicSymbols`")) + - " for symbol table section '" + RawSec->Name + "'"); - if (RawSec->Size) - reportError("cannot specify both `Size` and " + - (IsStatic ? Twine("`Symbols`") : Twine("`DynamicSymbols`")) + - " for symbol table section '" + RawSec->Name + "'"); - return; + if (RawSec && (RawSec->Content || RawSec->Size)) { + bool HasSymbolsDescription = + (IsStatic && Doc.Symbols) || (!IsStatic && Doc.DynamicSymbols); + if (HasSymbolsDescription) { + StringRef Property = (IsStatic ? "`Symbols`" : "`DynamicSymbols`"); + if (RawSec->Content) + reportError("cannot specify both `Content` and " + Property + + " for symbol table section '" + RawSec->Name + "'"); + if (RawSec->Size) + reportError("cannot specify both `Size` and " + Property + + " for symbol table section '" + RawSec->Name + "'"); + return; + } } zero(SHeader); @@ -1334,7 +1337,8 @@ if (Doc.Symbols) Build(*Doc.Symbols, SymN2I); - Build(Doc.DynamicSymbols, DynSymN2I); + if (Doc.DynamicSymbols) + Build(*Doc.DynamicSymbols, DynSymN2I); } template void ELFState::finalizeStrings() { @@ -1345,8 +1349,9 @@ DotStrtab.finalize(); // Add the dynamic symbol names to .dynstr section. - for (const ELFYAML::Symbol &Sym : Doc.DynamicSymbols) - DotDynstr.add(ELFYAML::dropUniqueSuffix(Sym.Name)); + if (Doc.DynamicSymbols) + for (const ELFYAML::Symbol &Sym : *Doc.DynamicSymbols) + DotDynstr.add(ELFYAML::dropUniqueSuffix(Sym.Name)); // SHT_GNU_verdef and SHT_GNU_verneed sections might also // add strings to .dynstr section. Index: llvm/test/tools/yaml2obj/ELF/dynsymtab-implicit-sections-size-content.yaml =================================================================== --- llvm/test/tools/yaml2obj/ELF/dynsymtab-implicit-sections-size-content.yaml +++ llvm/test/tools/yaml2obj/ELF/dynsymtab-implicit-sections-size-content.yaml @@ -30,6 +30,7 @@ ## Specifying both `Size` and symbols at the same time is not allowed for .dynsym. # RUN: not yaml2obj --docnum=2 %s 2>&1 | FileCheck %s --implicit-check-not=error --check-prefix=CASE2 +# RUN: not yaml2obj --docnum=3 %s 2>&1 | FileCheck %s --implicit-check-not=error --check-prefix=CASE2 # CASE2: yaml2obj: error: cannot specify both `Size` and `DynamicSymbols` for symbol table section '.dynsym' @@ -50,9 +51,25 @@ - Name: foo Binding: STB_GLOBAL +--- !ELF +FileHeader: + Class: ELFCLASS64 + Data: ELFDATA2LSB + Type: ET_DYN + Machine: EM_X86_64 +Sections: + - Name: .dynsym + Type: SHT_DYNSYM + Size: 0x100 + - Name: .dynsym2 + Type: SHT_DYNSYM + Size: 0x100 +DynamicSymbols: [] + ## Specifying both `Content` and symbols at the same time is not allowed for .dynsym. -# RUN: not yaml2obj --docnum=3 %s 2>&1 | FileCheck %s --implicit-check-not=error --check-prefix=CASE3 +# RUN: not yaml2obj --docnum=4 %s 2>&1 | FileCheck %s --implicit-check-not=error --check-prefix=CASE3 +# RUN: not yaml2obj --docnum=5 %s 2>&1 | FileCheck %s --implicit-check-not=error --check-prefix=CASE3 # CASE3: yaml2obj: error: cannot specify both `Content` and `DynamicSymbols` for symbol table section '.dynsym' @@ -63,18 +80,33 @@ Type: ET_DYN Machine: EM_X86_64 Sections: - - Name: .dynsym - Type: SHT_DYNSYM + - Name: .dynsym + Type: SHT_DYNSYM Content: "00" - - Name: .dynsym2 - Type: SHT_DYNSYM + - Name: .dynsym2 + Type: SHT_DYNSYM Content: "00" DynamicSymbols: - Name: foo Binding: STB_GLOBAL +--- !ELF +FileHeader: + Class: ELFCLASS64 + Data: ELFDATA2LSB + Type: ET_DYN + Machine: EM_X86_64 +Sections: + - Name: .dynsym + Type: SHT_DYNSYM + Content: "00" + - Name: .dynsym2 + Type: SHT_DYNSYM + Content: "00" +DynamicSymbols: [] + ## Check we can use just `Content` to emit custom data in the symbol table section. -# RUN: yaml2obj --docnum=4 %s -o %t4 +# RUN: yaml2obj --docnum=6 %s -o %t4 # RUN: llvm-readobj --section-data -S %t4 | FileCheck %s --check-prefix=CASE4 # CASE4: Name: .dynsym @@ -106,7 +138,7 @@ ## Check we can use just `Size` to emit custom data filled with zeroes ## in the symbol table section. -# RUN: yaml2obj --docnum=5 %s -o %t5 +# RUN: yaml2obj --docnum=7 %s -o %t5 # RUN: llvm-readobj --section-data -S %t5 | FileCheck %s --check-prefix=CASE5 # CASE5: Name: .dynsym @@ -140,7 +172,7 @@ ## than content size. In this case zeroes are added as padding ## after after the specified content. -# RUN: yaml2obj --docnum=6 %s -o %t6 +# RUN: yaml2obj --docnum=8 %s -o %t6 # RUN: llvm-readobj %t6 --section-data -S | FileCheck %s --check-prefix=CASE6 # CASE6: Name: .dynsym @@ -174,7 +206,7 @@ ## Check we can specify both `Size` and `Content` when size is ## equal to content size. -# RUN: yaml2obj --docnum=7 %s -o %t7 +# RUN: yaml2obj --docnum=9 %s -o %t7 # RUN: llvm-readobj --section-data -S %t7 | FileCheck %s --check-prefix=CASE7 # CASE7: Name: .dynsym Index: llvm/test/tools/yaml2obj/ELF/gnu-hash-section.yaml =================================================================== --- llvm/test/tools/yaml2obj/ELF/gnu-hash-section.yaml +++ llvm/test/tools/yaml2obj/ELF/gnu-hash-section.yaml @@ -32,9 +32,7 @@ Type: SHT_GNU_HASH Content: "001122" ## Used to trigger .dynsym creation. -DynamicSymbols: - - Name: foo - Binding: STB_GLOBAL +DynamicSymbols: [] ## Check we can use "Header", "BloomFilter", "HashBuckets" and "HashValues" keys to describe ## the hash section. Check we can set sh_link to any arbitrary value. Check both ELFCLASS32 and 64 bit output. Index: llvm/test/tools/yaml2obj/ELF/implicit-sections-addr.yaml =================================================================== --- llvm/test/tools/yaml2obj/ELF/implicit-sections-addr.yaml +++ llvm/test/tools/yaml2obj/ELF/implicit-sections-addr.yaml @@ -52,6 +52,4 @@ - Name: .symtab Type: SHT_SYMTAB Address: 0x4000 -DynamicSymbols: - - Name: foo - Binding: STB_GLOBAL +DynamicSymbols: [] Index: llvm/test/tools/yaml2obj/ELF/implicit-sections-types.yaml =================================================================== --- llvm/test/tools/yaml2obj/ELF/implicit-sections-types.yaml +++ llvm/test/tools/yaml2obj/ELF/implicit-sections-types.yaml @@ -27,9 +27,7 @@ ## Needed to force the creation of the .symtab. Symbols: [] ## Needed to force the creation of the .dynsym and .dynstr. -DynamicSymbols: - - Name: foo - - Binding: STB_GLOBAL +DynamicSymbols: [] ## Check we can set any arbitrary types when describing sections ## that are usually implicit. Index: llvm/test/tools/yaml2obj/ELF/implicit-sections.yaml =================================================================== --- llvm/test/tools/yaml2obj/ELF/implicit-sections.yaml +++ llvm/test/tools/yaml2obj/ELF/implicit-sections.yaml @@ -11,12 +11,12 @@ # CHECK: Section Headers: # CHECK-NEXT: [Nr] Name Type Address Off Size # CHECK-NEXT: [ 0] NULL 0000000000000000 000000 000000 -# CHECK-NEXT: [ 1] .dynstr STRTAB 0000000000000100 000040 000009 -# CHECK-NEXT: [ 2] .dynsym DYNSYM 0000000000000150 000049 000030 -# CHECK-NEXT: [ 3] .symtab SYMTAB 0000000000000000 000079 000018 -# CHECK-NEXT: [ 4] .strtab STRTAB 0000000000000000 000091 000001 -# CHECK-NEXT: [ 5] .shstrtab STRTAB 0000000000000000 000092 000035 -# CHECK-NEXT: [ 6] .text.foo PROGBITS 0000000000000200 0000c7 000000 +# CHECK-NEXT: [ 1] .dynstr STRTAB 0000000000000100 000040 000001 +# CHECK-NEXT: [ 2] .dynsym DYNSYM 0000000000000150 000041 000018 +# CHECK-NEXT: [ 3] .symtab SYMTAB 0000000000000000 000059 000018 +# CHECK-NEXT: [ 4] .strtab STRTAB 0000000000000000 000071 000001 +# CHECK-NEXT: [ 5] .shstrtab STRTAB 0000000000000000 000072 000035 +# CHECK-NEXT: [ 6] .text.foo PROGBITS 0000000000000200 0000a7 000000 --- !ELF FileHeader: @@ -40,10 +40,6 @@ - Name: .text.foo Type: SHT_PROGBITS Address: 0x200 -## Symbol is required for the .dynsym to be generated. -DynamicSymbols: - - Name: _Z3fooi - Binding: STB_GLOBAL ## Check that yaml2obj creates empty .dynstr and .dynsym sections for ## the case when no dynamic symbols were specified and Content wasn't set, Index: llvm/test/tools/yaml2obj/ELF/symtab-implicit-sections-size-content.yaml =================================================================== --- llvm/test/tools/yaml2obj/ELF/symtab-implicit-sections-size-content.yaml +++ llvm/test/tools/yaml2obj/ELF/symtab-implicit-sections-size-content.yaml @@ -27,6 +27,7 @@ ## Specifying both `Size` and symbols at the same time is not allowed. # RUN: not yaml2obj --docnum=2 %s -o %t2 2>&1 | FileCheck %s --check-prefix=CASE2 +# RUN: not yaml2obj --docnum=3 %s -o %t2 2>&1 | FileCheck %s --check-prefix=CASE2 # CASE2: error: cannot specify both `Size` and `Symbols` for symbol table section '.symtab' @@ -43,8 +44,21 @@ Symbols: - Name: foo +--- !ELF +FileHeader: + Class: ELFCLASS64 + Data: ELFDATA2LSB + Type: ET_DYN + Machine: EM_X86_64 +Sections: + - Name: .symtab + Type: SHT_SYMTAB + Size: 0x100 +Symbols: [] + ## Specifying both `Content` and symbols at the same time is not allowed. -# RUN: not yaml2obj --docnum=3 %s -o %t3 2>&1 | FileCheck %s --check-prefix=CASE3 +# RUN: not yaml2obj --docnum=4 %s -o %t3 2>&1 | FileCheck %s --check-prefix=CASE3 +# RUN: not yaml2obj --docnum=5 %s -o %t3 2>&1 | FileCheck %s --check-prefix=CASE3 # CASE3: error: cannot specify both `Content` and `Symbols` for symbol table section '.symtab' @@ -55,14 +69,26 @@ Type: ET_DYN Machine: EM_X86_64 Sections: - - Name: .symtab - Type: SHT_SYMTAB + - Name: .symtab + Type: SHT_SYMTAB Content: "00" Symbols: - Name: foo +--- !ELF +FileHeader: + Class: ELFCLASS64 + Data: ELFDATA2LSB + Type: ET_DYN + Machine: EM_X86_64 +Sections: + - Name: .symtab + Type: SHT_SYMTAB + Content: "00" +Symbols: [] + ## Check we can use just `Content` to emit custom data in the symbol table section. -# RUN: yaml2obj --docnum=4 %s -o %t4 +# RUN: yaml2obj --docnum=6 %s -o %t4 # RUN: llvm-readobj --section-data -S %t4 | FileCheck %s --check-prefix=CASE4 # CASE4: Name: .symtab @@ -93,7 +119,7 @@ ## Check we can use just `Size` to emit custom data filled with zeroes ## in the symbol table section. -# RUN: yaml2obj --docnum=5 %s -o %t5 +# RUN: yaml2obj --docnum=7 %s -o %t5 # RUN: llvm-readobj --section-data -S %t5 | FileCheck %s --check-prefix=CASE5 # CASE5: Name: .symtab (19) @@ -126,7 +152,7 @@ ## than content size. In this case zeroes are added as padding ## after the specified content. -# RUN: yaml2obj --docnum=6 %s -o %t6 +# RUN: yaml2obj --docnum=8 %s -o %t6 # RUN: llvm-readobj %t6 --section-data -S | FileCheck %s --check-prefix=CASE6 # CASE6: Name: .symtab @@ -159,7 +185,7 @@ ## Check we can specify both `Size` and `Content` when size is ## equal to content size. -# RUN: yaml2obj --docnum=7 %s -o %t7 +# RUN: yaml2obj --docnum=9 %s -o %t7 # RUN: llvm-readobj --section-data -S %t7 | FileCheck %s --check-prefix=CASE7 # CASE7: Name: .symtab Index: llvm/tools/obj2yaml/elf2yaml.cpp =================================================================== --- llvm/tools/obj2yaml/elf2yaml.cpp +++ llvm/tools/obj2yaml/elf2yaml.cpp @@ -215,9 +215,11 @@ return std::move(E); } - if (DynSymTab) - if (Error E = dumpSymbols(DynSymTab, Y->DynamicSymbols)) + if (DynSymTab) { + Y->DynamicSymbols.emplace(); + if (Error E = dumpSymbols(DynSymTab, *Y->DynamicSymbols)) return std::move(E); + } for (const Elf_Shdr &Sec : Sections) { switch (Sec.sh_type) {