Index: ELF/Arch/Hexagon.cpp =================================================================== --- /dev/null +++ ELF/Arch/Hexagon.cpp @@ -0,0 +1,86 @@ +//===-- Hexagon.cpp -------------------------------------------------------===// +// +// The LLVM Linker +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#include "InputFiles.h" +#include "Symbols.h" +#include "Target.h" +#include "lld/Common/ErrorHandler.h" +#include "llvm/BinaryFormat/ELF.h" +#include "llvm/Object/ELF.h" +#include "llvm/Support/Endian.h" + +using namespace llvm; +using namespace llvm::object; +using namespace llvm::support::endian; +using namespace llvm::ELF; +using namespace lld; +using namespace lld::elf; + +namespace { +class HexagonReloc final : public TargetInfo { +public: + uint32_t calcEFlags() const override; + uint32_t applyMask(uint32_t Mask, uint32_t Data) const; + RelExpr getRelExpr(RelType Type, const Symbol &S, + const uint8_t *Loc) const override; + void relocateOne(uint8_t *Loc, RelType Type, uint64_t Val) const override; +}; +} // namespace + +// Support V60 only at the moment. +uint32_t HexagonReloc::calcEFlags() const { + assert(!ObjectFiles.empty()); + return 0x60; +} + +uint32_t HexagonReloc::applyMask(uint32_t Mask, uint32_t Data) const { + uint32_t Result = 0; + size_t Off = 0; + + for (size_t Bit = 0; Bit != 32; ++Bit) { + bool ValBit = (Data >> Off) & 1; + bool MaskBit = (Mask >> Bit) & 1; + if (MaskBit) { + Result |= (ValBit << Bit); + ++Off; + } + } + return Result; +} + +RelExpr HexagonReloc::getRelExpr(RelType Type, const Symbol &S, + const uint8_t *Loc) const { + switch (Type) { + case R_HEX_B22_PCREL: + return R_PC; + default: + return R_ABS; + } +} + +static void or32le(uint8_t *P, int32_t V) { write32le(P, read32le(P) | V); } + +void HexagonReloc::relocateOne(uint8_t *Loc, RelType Type, uint64_t Val) const { + switch (Type) { + case R_HEX_NONE: + break; + case R_HEX_B22_PCREL: { + or32le(Loc, applyMask(0x01ff3ffe, ((Val >> 2) & 0x3fffff))); + break; + } + default: + error(getErrorLocation(Loc) + "unrecognized reloc " + toString(Type)); + break; + } +} + +TargetInfo *elf::getHexagonTargetInfo() { + static HexagonReloc Target; + return &Target; +} Index: ELF/CMakeLists.txt =================================================================== --- ELF/CMakeLists.txt +++ ELF/CMakeLists.txt @@ -12,6 +12,7 @@ Arch/AMDGPU.cpp Arch/ARM.cpp Arch/AVR.cpp + Arch/Hexagon.cpp Arch/Mips.cpp Arch/MipsArchTree.cpp Arch/PPC.cpp Index: ELF/Target.h =================================================================== --- ELF/Target.h +++ ELF/Target.h @@ -134,6 +134,7 @@ TargetInfo *getAMDGPUTargetInfo(); TargetInfo *getARMTargetInfo(); TargetInfo *getAVRTargetInfo(); +TargetInfo *getHexagonTargetInfo(); TargetInfo *getPPC64TargetInfo(); TargetInfo *getPPCTargetInfo(); TargetInfo *getSPARCV9TargetInfo(); Index: ELF/Target.cpp =================================================================== --- ELF/Target.cpp +++ ELF/Target.cpp @@ -60,6 +60,8 @@ return getARMTargetInfo(); case EM_AVR: return getAVRTargetInfo(); + case EM_HEXAGON: + return getHexagonTargetInfo(); case EM_MIPS: switch (Config->EKind) { case ELF32LEKind: Index: test/ELF/Inputs/hexagon.s =================================================================== --- /dev/null +++ test/ELF/Inputs/hexagon.s @@ -0,0 +1,6 @@ +.global _start +_start: + nop +.global foo +foo: + jumpr lr Index: test/ELF/hexagon.s =================================================================== --- /dev/null +++ test/ELF/hexagon.s @@ -0,0 +1,9 @@ +# REQUIRES: hexagon +# RUN: llvm-mc -filetype=obj -triple=hexagon-unknown-elf %s -o %t +# RUN: llvm-mc -filetype=obj -triple=hexagon-unknown-elf %S/Inputs/hexagon.s -o %t2 +# RUN: ld.lld %t2 %t -o %t3 +# RUN: llvm-objdump -d %t3 | FileCheck %s + +# R_HEX_B22_PCREL +call #_start +# CHECK: call 0x11000 Index: test/lit.cfg.py =================================================================== --- test/lit.cfg.py +++ test/lit.cfg.py @@ -65,6 +65,7 @@ 'AMDGPU': 'amdgpu', 'ARM': 'arm', 'AVR': 'avr', + 'Hexagon': 'hexagon', 'Mips': 'mips', 'PowerPC': 'ppc', 'Sparc': 'sparc',