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Allow FDE references outside the +/-2GB range supported by PC relative

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offsets for code models other than small/medium. For JIT application,
memory layout is less controlled and can result in truncations
otherwise. 

Patch from Akos Kiss.

Differential Revision: http://reviews.llvm.org/D6079


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@222538 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Joerg Sonnenberger 2014-11-21 14:42:43 +00:00
parent 0889d65fd5
commit 28a626319e
1 changed files with 11 additions and 0 deletions
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11
lib/MC/MCObjectFileInfo.cpp
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@ -273,6 +273,17 @@ void MCObjectFileInfo::InitELFMCObjectFileInfo(Triple T) {
case Triple::mips64el:
FDECFIEncoding = dwarf::DW_EH_PE_sdata8;
break;
case Triple::x86_64:
if (RelocM == Reloc::PIC_) {
FDECFIEncoding = dwarf::DW_EH_PE_pcrel |
((CMModel == CodeModel::Small || CMModel == CodeModel::Medium)
? dwarf::DW_EH_PE_sdata4 : dwarf::DW_EH_PE_sdata8);
} else {
FDECFIEncoding =
(CMModel == CodeModel::Small || CMModel == CodeModel::Medium)
? dwarf::DW_EH_PE_udata4 : dwarf::DW_EH_PE_absptr;
}
break;
default:
FDECFIEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
break;