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//===-- llvm/BinaryFormat/MachO.cpp - The MachO file format -----*- C++/-*-===//
//
// 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
//
//===----------------------------------------------------------------------===//
#include "llvm/BinaryFormat/MachO.h"
#include "llvm/TargetParser/ARMTargetParser.h"
#include "llvm/TargetParser/Triple.h"
using namespace llvm;
static MachO::CPUSubTypeX86 getX86SubType(const Triple &T) {
assert(T.isX86());
if (T.isArch32Bit())
return MachO::CPU_SUBTYPE_I386_ALL;
assert(T.isArch64Bit());
if (T.getArchName() == "x86_64h")
return MachO::CPU_SUBTYPE_X86_64_H;
return MachO::CPU_SUBTYPE_X86_64_ALL;
}
static MachO::CPUSubTypeARM getARMSubType(const Triple &T) {
assert(T.isARM() || T.isThumb());
StringRef Arch = T.getArchName();
ARM::ArchKind AK = ARM::parseArch(Arch);
switch (AK) {
default:
return MachO::CPU_SUBTYPE_ARM_V7;
case ARM::ArchKind::ARMV4T:
return MachO::CPU_SUBTYPE_ARM_V4T;
case ARM::ArchKind::ARMV5T:
case ARM::ArchKind::ARMV5TE:
case ARM::ArchKind::ARMV5TEJ:
return MachO::CPU_SUBTYPE_ARM_V5;
case ARM::ArchKind::ARMV6:
case ARM::ArchKind::ARMV6K:
return MachO::CPU_SUBTYPE_ARM_V6;
case ARM::ArchKind::ARMV7A:
return MachO::CPU_SUBTYPE_ARM_V7;
case ARM::ArchKind::ARMV7S:
return MachO::CPU_SUBTYPE_ARM_V7S;
case ARM::ArchKind::ARMV7K:
return MachO::CPU_SUBTYPE_ARM_V7K;
case ARM::ArchKind::ARMV6M:
return MachO::CPU_SUBTYPE_ARM_V6M;
case ARM::ArchKind::ARMV7M:
return MachO::CPU_SUBTYPE_ARM_V7M;
case ARM::ArchKind::ARMV7EM:
return MachO::CPU_SUBTYPE_ARM_V7EM;
}
}
static MachO::CPUSubTypeARM64 getARM64SubType(const Triple &T) {
assert(T.isAArch64());
if (T.isArch32Bit())
return (MachO::CPUSubTypeARM64)MachO::CPU_SUBTYPE_ARM64_32_V8;
if (T.isArm64e())
return MachO::CPU_SUBTYPE_ARM64E;
return MachO::CPU_SUBTYPE_ARM64_ALL;
}
static MachO::CPUSubTypePowerPC getPowerPCSubType(const Triple &T) {
return MachO::CPU_SUBTYPE_POWERPC_ALL;
}
static Error unsupported(const char *Str, const Triple &T) {
return createStringError(std::errc::invalid_argument,
"Unsupported triple for mach-o cpu %s: %s", Str,
T.str().c_str());
}
Expected<uint32_t> MachO::getCPUType(const Triple &T) {
if (!T.isOSBinFormatMachO())
return unsupported("type", T);
if (T.isX86() && T.isArch32Bit())
return MachO::CPU_TYPE_X86;
if (T.isX86() && T.isArch64Bit())
return MachO::CPU_TYPE_X86_64;
if (T.isARM() || T.isThumb())
return MachO::CPU_TYPE_ARM;
if (T.isAArch64())
return T.isArch32Bit() ? MachO::CPU_TYPE_ARM64_32 : MachO::CPU_TYPE_ARM64;
if (T.getArch() == Triple::ppc)
return MachO::CPU_TYPE_POWERPC;
if (T.getArch() == Triple::ppc64)
return MachO::CPU_TYPE_POWERPC64;
return unsupported("type", T);
}
Expected<uint32_t> MachO::getCPUSubType(const Triple &T) {
if (!T.isOSBinFormatMachO())
return unsupported("subtype", T);
if (T.isX86())
return getX86SubType(T);
if (T.isARM() || T.isThumb())
return getARMSubType(T);
if (T.isAArch64() || T.getArch() == Triple::aarch64_32)
return getARM64SubType(T);
if (T.getArch() == Triple::ppc || T.getArch() == Triple::ppc64)
return getPowerPCSubType(T);
return unsupported("subtype", T);
}
Expected<uint32_t> MachO::getCPUSubType(const Triple &T,
unsigned PtrAuthABIVersion,
bool PtrAuthKernelABIVersion) {
Expected<uint32_t> Result = MachO::getCPUSubType(T);
if (!Result)
return Result.takeError();
if (*Result != MachO::CPU_SUBTYPE_ARM64E)
return createStringError(
std::errc::invalid_argument,
"ptrauth ABI version is only supported on arm64e.");
if (PtrAuthABIVersion > 0xF)
return createStringError(
std::errc::invalid_argument,
"The ptrauth ABI version needs to fit within 4 bits.");
return CPU_SUBTYPE_ARM64E_WITH_PTRAUTH_VERSION(PtrAuthABIVersion,
PtrAuthKernelABIVersion);
}
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