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author | Adhemerval Zanella <azanella@linux.vnet.ibm.com> | 2015-04-22 15:26:43 +0000 |
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committer | Adhemerval Zanella <azanella@linux.vnet.ibm.com> | 2015-04-22 15:26:43 +0000 |
commit | c728e851dc1990b10a7765413004d7d39b6fc029 (patch) | |
tree | fad5e3ab945f02b89b06f15b89c6a6b6dafaa8ab /tools/yaml2obj/yaml2elf.cpp | |
parent | 8b94db17a43a9d847fb088ac49bafde15ba61a6d (diff) |
Support arm32 R_ARM_V4BX relocation format
ARM32 ELF R_ARM_V4BX relocation format is a special relocation type
that records the location of an ARMv4t BX instruction to enable a
static linker to generate ARMv4 compatible instructions. This
relocation does not contain a reference symbol.
This patch enabled its creation by removing the requeriment of a
relocation symbol target in ELFState<ELFT>::writeSectionContent.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@235513 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'tools/yaml2obj/yaml2elf.cpp')
-rw-r--r-- | tools/yaml2obj/yaml2elf.cpp | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/tools/yaml2obj/yaml2elf.cpp b/tools/yaml2obj/yaml2elf.cpp index 5d4c26379be..17dbe8b03da 100644 --- a/tools/yaml2obj/yaml2elf.cpp +++ b/tools/yaml2obj/yaml2elf.cpp @@ -357,12 +357,11 @@ ELFState<ELFT>::writeSectionContent(Elf_Shdr &SHeader, auto &OS = CBA.getOSAndAlignedOffset(SHeader.sh_offset); for (const auto &Rel : Section.Relocations) { - unsigned SymIdx; - if (SymN2I.lookup(Rel.Symbol, SymIdx)) { - errs() << "error: Unknown symbol referenced: '" << Rel.Symbol - << "' at YAML relocation.\n"; - return false; - } + unsigned SymIdx = 0; + // Some special relocation, R_ARM_v4BX for instance, does not have + // an external reference. So it ignores the return value of lookup() + // here. + SymN2I.lookup(Rel.Symbol, SymIdx); if (IsRela) { Elf_Rela REntry; |