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| author | Artur Pilipenko <apilipenko@azulsystems.com> | 2019-09-21 01:37:14 +0000 |
|---|---|---|
| committer | Artur Pilipenko <apilipenko@azulsystems.com> | 2019-09-21 01:37:14 +0000 |
| commit | 3e6590c45177958030513e6be199fc2d54f13ac7 (patch) | |
| tree | b7e8402f330ef05fdd21cb7b26392bdb5a290c8f /llvm/lib/Object/RelocationResolver.cpp | |
| parent | c96d5545f0c97b3ad88672a09a4feeb7256ce2cb (diff) | |
| download | bcm5719-llvm-3e6590c45177958030513e6be199fc2d54f13ac7.tar.gz bcm5719-llvm-3e6590c45177958030513e6be199fc2d54f13ac7.zip | |
Support for 64-bit PC-relative relocations for X86_64
ELF files generated for X86_64 targets may contain 64-bit PC-relative
relocations. For instance, an exception handler table entry contains the start
of exception-throwing frame relative to the start of exception handler. As these
two labels belong to different sections, their difference and so the relocation
is 64-bit.
An attempt to parse such file, i.e. in DWARFContext::create, results in "failed
to compute relocation" error.
This fix adds support for such relocations to RelocationResolver.cpp.
Reviewed By: MaskRay
Differential Revision: https://reviews.llvm.org/D67779
Patch by Oleg Pliss (Oleg.Pliss@azul.com)
llvm-svn: 372447
Diffstat (limited to 'llvm/lib/Object/RelocationResolver.cpp')
| -rw-r--r-- | llvm/lib/Object/RelocationResolver.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/llvm/lib/Object/RelocationResolver.cpp b/llvm/lib/Object/RelocationResolver.cpp index 90ae4fa4a54..ca89f5671b8 100644 --- a/llvm/lib/Object/RelocationResolver.cpp +++ b/llvm/lib/Object/RelocationResolver.cpp @@ -30,6 +30,7 @@ static bool supportsX86_64(uint64_t Type) { case ELF::R_X86_64_DTPOFF32: case ELF::R_X86_64_DTPOFF64: case ELF::R_X86_64_PC32: + case ELF::R_X86_64_PC64: case ELF::R_X86_64_32: case ELF::R_X86_64_32S: return true; @@ -47,6 +48,7 @@ static uint64_t resolveX86_64(RelocationRef R, uint64_t S, uint64_t A) { case ELF::R_X86_64_DTPOFF64: return S + getELFAddend(R); case ELF::R_X86_64_PC32: + case ELF::R_X86_64_PC64: return S + getELFAddend(R) - R.getOffset(); case ELF::R_X86_64_32: case ELF::R_X86_64_32S: |
