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llvm-project/llvm/lib/ExecutionEngine/JITLink/ELF_riscv.cpp

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//===------- ELF_riscv.cpp -JIT linker implementation for ELF/riscv -------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// ELF/riscv jit-link implementation.
//
//===----------------------------------------------------------------------===//
#include "llvm/ExecutionEngine/JITLink/ELF_riscv.h"
#include "ELFLinkGraphBuilder.h"
#include "JITLinkGeneric.h"
#include "PerGraphGOTAndPLTStubsBuilder.h"
#include "llvm/BinaryFormat/ELF.h"
#include "llvm/ExecutionEngine/JITLink/JITLink.h"
#include "llvm/ExecutionEngine/JITLink/riscv.h"
#include "llvm/Object/ELF.h"
#include "llvm/Object/ELFObjectFile.h"
#include "llvm/Support/Endian.h"
#define DEBUG_TYPE "jitlink"
using namespace llvm;
using namespace llvm::jitlink;
using namespace llvm::jitlink::riscv;
namespace {
class PerGraphGOTAndPLTStubsBuilder_ELF_riscv
: public PerGraphGOTAndPLTStubsBuilder<
PerGraphGOTAndPLTStubsBuilder_ELF_riscv> {
public:
static constexpr size_t StubEntrySize = 16;
static const uint8_t NullGOTEntryContent[8];
static const uint8_t RV64StubContent[StubEntrySize];
static const uint8_t RV32StubContent[StubEntrySize];
using PerGraphGOTAndPLTStubsBuilder<
PerGraphGOTAndPLTStubsBuilder_ELF_riscv>::PerGraphGOTAndPLTStubsBuilder;
bool isRV64() const { return G.getPointerSize() == 8; }
bool isGOTEdgeToFix(Edge &E) const { return E.getKind() == R_RISCV_GOT_HI20; }
Symbol &createGOTEntry(Symbol &Target) {
Block &GOTBlock =
G.createContentBlock(getGOTSection(), getGOTEntryBlockContent(),
orc::ExecutorAddr(), G.getPointerSize(), 0);
GOTBlock.addEdge(isRV64() ? R_RISCV_64 : R_RISCV_32, 0, Target, 0);
return G.addAnonymousSymbol(GOTBlock, 0, G.getPointerSize(), false, false);
}
Symbol &createPLTStub(Symbol &Target) {
Block &StubContentBlock = G.createContentBlock(
getStubsSection(), getStubBlockContent(), orc::ExecutorAddr(), 4, 0);
auto &GOTEntrySymbol = getGOTEntry(Target);
StubContentBlock.addEdge(R_RISCV_CALL, 0, GOTEntrySymbol, 0);
return G.addAnonymousSymbol(StubContentBlock, 0, StubEntrySize, true,
false);
}
void fixGOTEdge(Edge &E, Symbol &GOTEntry) {
// Replace the relocation pair (R_RISCV_GOT_HI20, R_RISCV_PCREL_LO12)
// with (R_RISCV_PCREL_HI20, R_RISCV_PCREL_LO12)
// Therefore, here just change the R_RISCV_GOT_HI20 to R_RISCV_PCREL_HI20
E.setKind(R_RISCV_PCREL_HI20);
E.setTarget(GOTEntry);
}
void fixPLTEdge(Edge &E, Symbol &PLTStubs) {
assert(E.getKind() == R_RISCV_CALL_PLT && "Not a R_RISCV_CALL_PLT edge?");
E.setKind(R_RISCV_CALL);
E.setTarget(PLTStubs);
}
bool isExternalBranchEdge(Edge &E) const {
return E.getKind() == R_RISCV_CALL_PLT;
}
private:
Section &getGOTSection() const {
if (!GOTSection)
GOTSection = &G.createSection("$__GOT", MemProt::Read);
return *GOTSection;
}
Section &getStubsSection() const {
if (!StubsSection)
StubsSection =
&G.createSection("$__STUBS", MemProt::Read | MemProt::Exec);
return *StubsSection;
}
ArrayRef<char> getGOTEntryBlockContent() {
return {reinterpret_cast<const char *>(NullGOTEntryContent),
G.getPointerSize()};
}
ArrayRef<char> getStubBlockContent() {
auto StubContent = isRV64() ? RV64StubContent : RV32StubContent;
return {reinterpret_cast<const char *>(StubContent), StubEntrySize};
}
mutable Section *GOTSection = nullptr;
mutable Section *StubsSection = nullptr;
};
const uint8_t PerGraphGOTAndPLTStubsBuilder_ELF_riscv::NullGOTEntryContent[8] =
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
const uint8_t
PerGraphGOTAndPLTStubsBuilder_ELF_riscv::RV64StubContent[StubEntrySize] = {
0x17, 0x0e, 0x00, 0x00, // auipc t3, literal
0x03, 0x3e, 0x0e, 0x00, // ld t3, literal(t3)
0x67, 0x00, 0x0e, 0x00, // jr t3
0x13, 0x00, 0x00, 0x00}; // nop
const uint8_t
PerGraphGOTAndPLTStubsBuilder_ELF_riscv::RV32StubContent[StubEntrySize] = {
0x17, 0x0e, 0x00, 0x00, // auipc t3, literal
0x03, 0x2e, 0x0e, 0x00, // lw t3, literal(t3)
0x67, 0x00, 0x0e, 0x00, // jr t3
0x13, 0x00, 0x00, 0x00}; // nop
} // namespace
namespace llvm {
namespace jitlink {
static Expected<const Edge &> getRISCVPCRelHi20(const Edge &E) {
using namespace riscv;
assert((E.getKind() == R_RISCV_PCREL_LO12_I ||
E.getKind() == R_RISCV_PCREL_LO12_S) &&
"Can only have high relocation for R_RISCV_PCREL_LO12_I or "
"R_RISCV_PCREL_LO12_S");
const Symbol &Sym = E.getTarget();
const Block &B = Sym.getBlock();
orc::ExecutorAddrDiff Offset = Sym.getOffset();
struct Comp {
bool operator()(const Edge &Lhs, orc::ExecutorAddrDiff Offset) {
return Lhs.getOffset() < Offset;
}
bool operator()(orc::ExecutorAddrDiff Offset, const Edge &Rhs) {
return Offset < Rhs.getOffset();
}
};
auto Bound =
std::equal_range(B.edges().begin(), B.edges().end(), Offset, Comp{});
for (auto It = Bound.first; It != Bound.second; ++It) {
if (It->getKind() == R_RISCV_PCREL_HI20)
return *It;
}
return make_error<JITLinkError>(
"No HI20 PCREL relocation type be found for LO12 PCREL relocation type");
}
static uint32_t extractBits(uint32_t Num, unsigned Low, unsigned Size) {
return (Num & (((1ULL << Size) - 1) << Low)) >> Low;
}
static inline bool isAlignmentCorrect(uint64_t Value, int N) {
return (Value & (N - 1)) ? false : true;
}
// Requires 0 < N <= 64.
static inline bool isInRangeForImm(int64_t Value, int N) {
return Value == llvm::SignExtend64(Value, N);
}
class ELFJITLinker_riscv : public JITLinker<ELFJITLinker_riscv> {
friend class JITLinker<ELFJITLinker_riscv>;
public:
ELFJITLinker_riscv(std::unique_ptr<JITLinkContext> Ctx,
std::unique_ptr<LinkGraph> G, PassConfiguration PassConfig)
: JITLinker(std::move(Ctx), std::move(G), std::move(PassConfig)) {}
private:
Error applyFixup(LinkGraph &G, Block &B, const Edge &E) const {
using namespace riscv;
using namespace llvm::support;
char *BlockWorkingMem = B.getAlreadyMutableContent().data();
char *FixupPtr = BlockWorkingMem + E.getOffset();
orc::ExecutorAddr FixupAddress = B.getAddress() + E.getOffset();
switch (E.getKind()) {
case R_RISCV_32: {
int64_t Value = (E.getTarget().getAddress() + E.getAddend()).getValue();
*(little32_t *)FixupPtr = static_cast<uint32_t>(Value);
break;
}
case R_RISCV_64: {
int64_t Value = (E.getTarget().getAddress() + E.getAddend()).getValue();
*(little64_t *)FixupPtr = static_cast<uint64_t>(Value);
break;
}
case R_RISCV_BRANCH: {
int64_t Value = E.getTarget().getAddress() + E.getAddend() - FixupAddress;
if (LLVM_UNLIKELY(!isInRangeForImm(Value >> 1, 12)))
return makeTargetOutOfRangeError(G, B, E);
if (LLVM_UNLIKELY(!isAlignmentCorrect(Value, 2)))
return makeAlignmentError(FixupAddress, Value, 2, E);
uint32_t Imm31_25 =
extractBits(Value, 5, 6) << 25 | extractBits(Value, 12, 1) << 31;
uint32_t Imm11_7 =
extractBits(Value, 1, 4) << 8 | extractBits(Value, 11, 1) << 7;
uint32_t RawInstr = *(little32_t *)FixupPtr;
*(little32_t *)FixupPtr = (RawInstr & 0x1FFF07F) | Imm31_25 | Imm11_7;
break;
}
case R_RISCV_JAL: {
int64_t Value = E.getTarget().getAddress() + E.getAddend() - FixupAddress;
if (LLVM_UNLIKELY(!isInRangeForImm(Value >> 1, 20)))
return makeTargetOutOfRangeError(G, B, E);
if (LLVM_UNLIKELY(!isAlignmentCorrect(Value, 2)))
return makeAlignmentError(FixupAddress, Value, 2, E);
uint32_t Imm20 = extractBits(Value, 20, 1) << 31;
uint32_t Imm10_1 = extractBits(Value, 1, 10) << 21;
uint32_t Imm11 = extractBits(Value, 11, 1) << 20;
uint32_t Imm19_12 = extractBits(Value, 12, 8) << 12;
uint32_t RawInstr = *(little32_t *)FixupPtr;
*(little32_t *)FixupPtr = RawInstr | Imm20 | Imm10_1 | Imm11 | Imm19_12;
break;
}
case R_RISCV_HI20: {
int64_t Value = (E.getTarget().getAddress() + E.getAddend()).getValue();
int64_t Hi = Value + 0x800;
if (LLVM_UNLIKELY(!isInRangeForImm(Hi, 32)))
return makeTargetOutOfRangeError(G, B, E);
uint32_t RawInstr = *(little32_t *)FixupPtr;
*(little32_t *)FixupPtr =
(RawInstr & 0xFFF) | (static_cast<uint32_t>(Hi & 0xFFFFF000));
break;
}
case R_RISCV_LO12_I: {
// FIXME: We assume that R_RISCV_HI20 is present in object code and pairs
// with current relocation R_RISCV_LO12_I. So here may need a check.
int64_t Value = (E.getTarget().getAddress() + E.getAddend()).getValue();
int32_t Lo = Value & 0xFFF;
uint32_t RawInstr = *(little32_t *)FixupPtr;
*(little32_t *)FixupPtr =
(RawInstr & 0xFFFFF) | (static_cast<uint32_t>(Lo & 0xFFF) << 20);
break;
}
case R_RISCV_CALL: {
int64_t Value = E.getTarget().getAddress() + E.getAddend() - FixupAddress;
int64_t Hi = Value + 0x800;
if (LLVM_UNLIKELY(!isInRangeForImm(Hi, 32)))
return makeTargetOutOfRangeError(G, B, E);
int32_t Lo = Value & 0xFFF;
uint32_t RawInstrAuipc = *(little32_t *)FixupPtr;
uint32_t RawInstrJalr = *(little32_t *)(FixupPtr + 4);
*(little32_t *)FixupPtr =
RawInstrAuipc | (static_cast<uint32_t>(Hi & 0xFFFFF000));
*(little32_t *)(FixupPtr + 4) =
RawInstrJalr | (static_cast<uint32_t>(Lo) << 20);
break;
}
case R_RISCV_PCREL_HI20: {
int64_t Value = E.getTarget().getAddress() + E.getAddend() - FixupAddress;
int64_t Hi = Value + 0x800;
if (LLVM_UNLIKELY(!isInRangeForImm(Hi, 32)))
return makeTargetOutOfRangeError(G, B, E);
uint32_t RawInstr = *(little32_t *)FixupPtr;
*(little32_t *)FixupPtr =
(RawInstr & 0xFFF) | (static_cast<uint32_t>(Hi & 0xFFFFF000));
break;
}
case R_RISCV_PCREL_LO12_I: {
// FIXME: We assume that R_RISCV_PCREL_HI20 is present in object code and
// pairs with current relocation R_RISCV_PCREL_LO12_I. So here may need a
// check.
auto RelHI20 = getRISCVPCRelHi20(E);
if (!RelHI20)
return RelHI20.takeError();
int64_t Value = RelHI20->getTarget().getAddress() +
RelHI20->getAddend() - E.getTarget().getAddress();
int64_t Lo = Value & 0xFFF;
uint32_t RawInstr = *(little32_t *)FixupPtr;
*(little32_t *)FixupPtr =
(RawInstr & 0xFFFFF) | (static_cast<uint32_t>(Lo & 0xFFF) << 20);
break;
}
case R_RISCV_PCREL_LO12_S: {
// FIXME: We assume that R_RISCV_PCREL_HI20 is present in object code and
// pairs with current relocation R_RISCV_PCREL_LO12_S. So here may need a
// check.
auto RelHI20 = getRISCVPCRelHi20(E);
int64_t Value = RelHI20->getTarget().getAddress() +
RelHI20->getAddend() - E.getTarget().getAddress();
int64_t Lo = Value & 0xFFF;
uint32_t Imm31_25 = extractBits(Lo, 5, 7) << 25;
uint32_t Imm11_7 = extractBits(Lo, 0, 5) << 7;
uint32_t RawInstr = *(little32_t *)FixupPtr;
*(little32_t *)FixupPtr = (RawInstr & 0x1FFF07F) | Imm31_25 | Imm11_7;
break;
}
case R_RISCV_ADD64: {
int64_t Value = (E.getTarget().getAddress() +
support::endian::read64le(reinterpret_cast<const void *>(
FixupAddress.getValue())) +
E.getAddend())
.getValue();
*(little64_t *)FixupPtr = static_cast<uint64_t>(Value);
break;
}
case R_RISCV_ADD32: {
int64_t Value = (E.getTarget().getAddress() +
support::endian::read32le(reinterpret_cast<const void *>(
FixupAddress.getValue())) +
E.getAddend())
.getValue();
*(little32_t *)FixupPtr = static_cast<uint32_t>(Value);
break;
}
case R_RISCV_ADD16: {
int64_t Value = (E.getTarget().getAddress() +
support::endian::read16le(reinterpret_cast<const void *>(
FixupAddress.getValue())) +
E.getAddend())
.getValue();
*(little16_t *)FixupPtr = static_cast<uint32_t>(Value);
break;
}
case R_RISCV_ADD8: {
int64_t Value =
(E.getTarget().getAddress() +
*(reinterpret_cast<const uint8_t *>(FixupAddress.getValue())) +
E.getAddend())
.getValue();
*FixupPtr = static_cast<uint8_t>(Value);
break;
}
case R_RISCV_SUB64: {
int64_t Value = support::endian::read64le(reinterpret_cast<const void *>(
FixupAddress.getValue())) -
E.getTarget().getAddress().getValue() - E.getAddend();
*(little64_t *)FixupPtr = static_cast<uint64_t>(Value);
break;
}
case R_RISCV_SUB32: {
int64_t Value = support::endian::read32le(reinterpret_cast<const void *>(
FixupAddress.getValue())) -
E.getTarget().getAddress().getValue() - E.getAddend();
*(little32_t *)FixupPtr = static_cast<uint32_t>(Value);
break;
}
case R_RISCV_SUB16: {
int64_t Value = support::endian::read16le(reinterpret_cast<const void *>(
FixupAddress.getValue())) -
E.getTarget().getAddress().getValue() - E.getAddend();
*(little16_t *)FixupPtr = static_cast<uint32_t>(Value);
break;
}
case R_RISCV_SUB8: {
int64_t Value =
*(reinterpret_cast<const uint8_t *>(FixupAddress.getValue())) -
E.getTarget().getAddress().getValue() - E.getAddend();
*FixupPtr = static_cast<uint8_t>(Value);
break;
}
case R_RISCV_SUB6: {
int64_t Value =
*(reinterpret_cast<const uint8_t *>(FixupAddress.getValue())) & 0x3f;
Value -= E.getTarget().getAddress().getValue() - E.getAddend();
*FixupPtr = (*FixupPtr & 0xc0) | (static_cast<uint8_t>(Value) & 0x3f);
break;
}
case R_RISCV_SET6: {
int64_t Value = (E.getTarget().getAddress() + E.getAddend()).getValue();
uint32_t RawData = *(little32_t *)FixupPtr;
int64_t Word6 = Value & 0x3f;
*(little32_t *)FixupPtr = (RawData & 0xffffffc0) | Word6;
break;
}
case R_RISCV_SET8: {
int64_t Value = (E.getTarget().getAddress() + E.getAddend()).getValue();
uint32_t RawData = *(little32_t *)FixupPtr;
int64_t Word8 = Value & 0xff;
*(little32_t *)FixupPtr = (RawData & 0xffffff00) | Word8;
break;
}
case R_RISCV_SET16: {
int64_t Value = (E.getTarget().getAddress() + E.getAddend()).getValue();
uint32_t RawData = *(little32_t *)FixupPtr;
int64_t Word16 = Value & 0xffff;
*(little32_t *)FixupPtr = (RawData & 0xffff0000) | Word16;
break;
}
case R_RISCV_SET32: {
int64_t Value = (E.getTarget().getAddress() + E.getAddend()).getValue();
int64_t Word32 = Value & 0xffffffff;
*(little32_t *)FixupPtr = Word32;
break;
}
case R_RISCV_32_PCREL: {
int64_t Value = E.getTarget().getAddress() + E.getAddend() - FixupAddress;
int64_t Word32 = Value & 0xffffffff;
*(little32_t *)FixupPtr = Word32;
break;
}
}
return Error::success();
}
};
template <typename ELFT>
class ELFLinkGraphBuilder_riscv : public ELFLinkGraphBuilder<ELFT> {
private:
static Expected<riscv::EdgeKind_riscv>
getRelocationKind(const uint32_t Type) {
using namespace riscv;
switch (Type) {
case ELF::R_RISCV_32:
return EdgeKind_riscv::R_RISCV_32;
case ELF::R_RISCV_64:
return EdgeKind_riscv::R_RISCV_64;
case ELF::R_RISCV_BRANCH:
return EdgeKind_riscv::R_RISCV_BRANCH;
case ELF::R_RISCV_JAL:
return EdgeKind_riscv::R_RISCV_JAL;
case ELF::R_RISCV_HI20:
return EdgeKind_riscv::R_RISCV_HI20;
case ELF::R_RISCV_LO12_I:
return EdgeKind_riscv::R_RISCV_LO12_I;
case ELF::R_RISCV_CALL:
return EdgeKind_riscv::R_RISCV_CALL;
case ELF::R_RISCV_PCREL_HI20:
return EdgeKind_riscv::R_RISCV_PCREL_HI20;
case ELF::R_RISCV_PCREL_LO12_I:
return EdgeKind_riscv::R_RISCV_PCREL_LO12_I;
case ELF::R_RISCV_PCREL_LO12_S:
return EdgeKind_riscv::R_RISCV_PCREL_LO12_S;
case ELF::R_RISCV_GOT_HI20:
return EdgeKind_riscv::R_RISCV_GOT_HI20;
case ELF::R_RISCV_CALL_PLT:
return EdgeKind_riscv::R_RISCV_CALL_PLT;
case ELF::R_RISCV_ADD64:
return EdgeKind_riscv::R_RISCV_ADD64;
case ELF::R_RISCV_ADD32:
return EdgeKind_riscv::R_RISCV_ADD32;
case ELF::R_RISCV_ADD16:
return EdgeKind_riscv::R_RISCV_ADD16;
case ELF::R_RISCV_ADD8:
return EdgeKind_riscv::R_RISCV_ADD8;
case ELF::R_RISCV_SUB64:
return EdgeKind_riscv::R_RISCV_SUB64;
case ELF::R_RISCV_SUB32:
return EdgeKind_riscv::R_RISCV_SUB32;
case ELF::R_RISCV_SUB16:
return EdgeKind_riscv::R_RISCV_SUB16;
case ELF::R_RISCV_SUB8:
return EdgeKind_riscv::R_RISCV_SUB8;
case ELF::R_RISCV_SUB6:
return EdgeKind_riscv::R_RISCV_SUB6;
case ELF::R_RISCV_SET6:
return EdgeKind_riscv::R_RISCV_SET6;
case ELF::R_RISCV_SET8:
return EdgeKind_riscv::R_RISCV_SET8;
case ELF::R_RISCV_SET16:
return EdgeKind_riscv::R_RISCV_SET16;
case ELF::R_RISCV_SET32:
return EdgeKind_riscv::R_RISCV_SET32;
case ELF::R_RISCV_32_PCREL:
return EdgeKind_riscv::R_RISCV_32_PCREL;
}
return make_error<JITLinkError>(
"Unsupported riscv relocation:" + formatv("{0:d}: ", Type) +
object::getELFRelocationTypeName(ELF::EM_RISCV, Type));
}
Error addRelocations() override {
LLVM_DEBUG(dbgs() << "Processing relocations:\n");
using Base = ELFLinkGraphBuilder<ELFT>;
using Self = ELFLinkGraphBuilder_riscv<ELFT>;
for (const auto &RelSect : Base::Sections)
if (Error Err = Base::forEachRelocation(RelSect, this,
&Self::addSingleRelocation))
return Err;
return Error::success();
}
Error addSingleRelocation(const typename ELFT::Rela &Rel,
const typename ELFT::Shdr &FixupSect,
Block &BlockToFix) {
using Base = ELFLinkGraphBuilder<ELFT>;
uint32_t Type = Rel.getType(false);
// We do not implement linker relaxation, except what is required for
// alignment (see below).
if (Type == llvm::ELF::R_RISCV_RELAX)
return Error::success();
int64_t Addend = Rel.r_addend;
if (Type == llvm::ELF::R_RISCV_ALIGN) {
uint64_t Alignment = PowerOf2Ceil(Addend);
// FIXME: Implement support for ensuring alignment together with linker
// relaxation; 2 bytes are guaranteed by the length of compressed
// instructions, so this does not need any action from our side.
if (Alignment > 2)
return make_error<JITLinkError>(
formatv("Unsupported relocation R_RISCV_ALIGN with alignment {0} "
"larger than 2 (addend: {1})",
Alignment, Addend));
return Error::success();
}
Expected<riscv::EdgeKind_riscv> Kind = getRelocationKind(Type);
if (!Kind)
return Kind.takeError();
uint32_t SymbolIndex = Rel.getSymbol(false);
auto ObjSymbol = Base::Obj.getRelocationSymbol(Rel, Base::SymTabSec);
if (!ObjSymbol)
return ObjSymbol.takeError();
Symbol *GraphSymbol = Base::getGraphSymbol(SymbolIndex);
if (!GraphSymbol)
return make_error<StringError>(
formatv("Could not find symbol at given index, did you add it to "
"JITSymbolTable? index: {0}, shndx: {1} Size of table: {2}",
SymbolIndex, (*ObjSymbol)->st_shndx,
Base::GraphSymbols.size()),
inconvertibleErrorCode());
auto FixupAddress = orc::ExecutorAddr(FixupSect.sh_addr) + Rel.r_offset;
Edge::OffsetT Offset = FixupAddress - BlockToFix.getAddress();
Edge GE(*Kind, Offset, *GraphSymbol, Addend);
LLVM_DEBUG({
dbgs() << " ";
printEdge(dbgs(), BlockToFix, GE, riscv::getEdgeKindName(*Kind));
dbgs() << "\n";
});
BlockToFix.addEdge(std::move(GE));
return Error::success();
}
public:
ELFLinkGraphBuilder_riscv(StringRef FileName,
const object::ELFFile<ELFT> &Obj, const Triple T)
: ELFLinkGraphBuilder<ELFT>(Obj, std::move(T), FileName,
riscv::getEdgeKindName) {}
};
Expected<std::unique_ptr<LinkGraph>>
createLinkGraphFromELFObject_riscv(MemoryBufferRef ObjectBuffer) {
LLVM_DEBUG({
dbgs() << "Building jitlink graph for new input "
<< ObjectBuffer.getBufferIdentifier() << "...\n";
});
auto ELFObj = object::ObjectFile::createELFObjectFile(ObjectBuffer);
if (!ELFObj)
return ELFObj.takeError();
if ((*ELFObj)->getArch() == Triple::riscv64) {
auto &ELFObjFile = cast<object::ELFObjectFile<object::ELF64LE>>(**ELFObj);
return ELFLinkGraphBuilder_riscv<object::ELF64LE>(
(*ELFObj)->getFileName(), ELFObjFile.getELFFile(),
(*ELFObj)->makeTriple())
.buildGraph();
} else {
assert((*ELFObj)->getArch() == Triple::riscv32 &&
"Invalid triple for RISCV ELF object file");
auto &ELFObjFile = cast<object::ELFObjectFile<object::ELF32LE>>(**ELFObj);
return ELFLinkGraphBuilder_riscv<object::ELF32LE>(
(*ELFObj)->getFileName(), ELFObjFile.getELFFile(),
(*ELFObj)->makeTriple())
.buildGraph();
}
}
void link_ELF_riscv(std::unique_ptr<LinkGraph> G,
std::unique_ptr<JITLinkContext> Ctx) {
PassConfiguration Config;
const Triple &TT = G->getTargetTriple();
if (Ctx->shouldAddDefaultTargetPasses(TT)) {
if (auto MarkLive = Ctx->getMarkLivePass(TT))
Config.PrePrunePasses.push_back(std::move(MarkLive));
else
Config.PrePrunePasses.push_back(markAllSymbolsLive);
Config.PostPrunePasses.push_back(
PerGraphGOTAndPLTStubsBuilder_ELF_riscv::asPass);
}
if (auto Err = Ctx->modifyPassConfig(*G, Config))
return Ctx->notifyFailed(std::move(Err));
ELFJITLinker_riscv::link(std::move(Ctx), std::move(G), std::move(Config));
}
} // namespace jitlink
} // namespace llvm
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