From 3e6590c45177958030513e6be199fc2d54f13ac7 Mon Sep 17 00:00:00 2001 From: Artur Pilipenko Date: Sat, 21 Sep 2019 01:37:14 +0000 Subject: 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 --- llvm/lib/Object/RelocationResolver.cpp | 2 ++ 1 file changed, 2 insertions(+) (limited to 'llvm/lib/Object/RelocationResolver.cpp') 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: -- cgit v1.2.3