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//===-------------- MachO.cpp - JIT linker function for MachO -------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// MachO jit-link function.
//
//===----------------------------------------------------------------------===//
#include "llvm/ExecutionEngine/JITLink/MachO.h"
#include "llvm/BinaryFormat/MachO.h"
#include "llvm/ExecutionEngine/JITLink/MachO_arm64.h"
#include "llvm/ExecutionEngine/JITLink/MachO_x86_64.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/SwapByteOrder.h"
using namespace llvm;
#define DEBUG_TYPE "jitlink"
namespace llvm {
namespace jitlink {
Expected<std::unique_ptr<LinkGraph>>
createLinkGraphFromMachOObject(MemoryBufferRef ObjectBuffer) {
StringRef Data = ObjectBuffer.getBuffer();
if (Data.size() < 4)
return make_error<JITLinkError>("Truncated MachO buffer \"" +
ObjectBuffer.getBufferIdentifier() + "\"");
uint32_t Magic;
memcpy(&Magic, Data.data(), sizeof(uint32_t));
LLVM_DEBUG({
dbgs() << "jitLink_MachO: magic = " << format("0x%08" PRIx32, Magic)
<< ", identifier = \"" << ObjectBuffer.getBufferIdentifier()
<< "\"\n";
});
if (Magic == MachO::MH_MAGIC || Magic == MachO::MH_CIGAM)
return make_error<JITLinkError>("MachO 32-bit platforms not supported");
else if (Magic == MachO::MH_MAGIC_64 || Magic == MachO::MH_CIGAM_64) {
if (Data.size() < sizeof(MachO::mach_header_64))
return make_error<JITLinkError>("Truncated MachO buffer \"" +
ObjectBuffer.getBufferIdentifier() +
"\"");
// Read the CPU type from the header.
uint32_t CPUType;
memcpy(&CPUType, Data.data() + 4, sizeof(uint32_t));
if (Magic == MachO::MH_CIGAM_64)
CPUType = ByteSwap_32(CPUType);
LLVM_DEBUG({
dbgs() << "jitLink_MachO: cputype = " << format("0x%08" PRIx32, CPUType)
<< "\n";
});
switch (CPUType) {
case MachO::CPU_TYPE_ARM64:
return createLinkGraphFromMachOObject_arm64(std::move(ObjectBuffer));
case MachO::CPU_TYPE_X86_64:
return createLinkGraphFromMachOObject_x86_64(std::move(ObjectBuffer));
}
return make_error<JITLinkError>("MachO-64 CPU type not valid");
} else
return make_error<JITLinkError>("Unrecognized MachO magic value");
}
void link_MachO(std::unique_ptr<LinkGraph> G,
std::unique_ptr<JITLinkContext> Ctx) {
switch (G->getTargetTriple().getArch()) {
case Triple::aarch64:
return link_MachO_arm64(std::move(G), std::move(Ctx));
case Triple::x86_64:
return link_MachO_x86_64(std::move(G), std::move(Ctx));
default:
Ctx->notifyFailed(make_error<JITLinkError>("MachO-64 CPU type not valid"));
return;
}
}
} // end namespace jitlink
} // end namespace llvm
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