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/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "instruction_set.h"
// Explicitly include our own elf.h to avoid Linux and other dependencies.
#include "../elf.h"
#include "globals.h"
namespace art {
const char* GetInstructionSetString(const InstructionSet isa) {
switch (isa) {
case kArm:
case kThumb2:
return "arm";
case kArm64:
return "arm64";
case kX86:
return "x86";
case kX86_64:
return "x86_64";
case kMips:
return "mips";
case kMips64:
return "mips64";
case kNone:
return "none";
default:
LOG(FATAL) << "Unknown ISA " << isa;
UNREACHABLE();
}
}
InstructionSet GetInstructionSetFromString(const char* isa_str) {
CHECK(isa_str != nullptr);
if (strcmp("arm", isa_str) == 0) {
return kArm;
} else if (strcmp("arm64", isa_str) == 0) {
return kArm64;
} else if (strcmp("x86", isa_str) == 0) {
return kX86;
} else if (strcmp("x86_64", isa_str) == 0) {
return kX86_64;
} else if (strcmp("mips", isa_str) == 0) {
return kMips;
} else if (strcmp("mips64", isa_str) == 0) {
return kMips64;
}
return kNone;
}
InstructionSet GetInstructionSetFromELF(uint16_t e_machine, uint32_t e_flags) {
switch (e_machine) {
case EM_ARM:
return kArm;
case EM_AARCH64:
return kArm64;
case EM_386:
return kX86;
case EM_X86_64:
return kX86_64;
case EM_MIPS: {
if ((e_flags & EF_MIPS_ARCH) == EF_MIPS_ARCH_32R2 ||
(e_flags & EF_MIPS_ARCH) == EF_MIPS_ARCH_32R6) {
return kMips;
} else if ((e_flags & EF_MIPS_ARCH) == EF_MIPS_ARCH_64R6) {
return kMips64;
}
break;
}
}
return kNone;
}
size_t GetInstructionSetAlignment(InstructionSet isa) {
switch (isa) {
case kArm:
// Fall-through.
case kThumb2:
return kArmAlignment;
case kArm64:
return kArm64Alignment;
case kX86:
// Fall-through.
case kX86_64:
return kX86Alignment;
case kMips:
// Fall-through.
case kMips64:
return kMipsAlignment;
case kNone:
LOG(FATAL) << "ISA kNone does not have alignment.";
UNREACHABLE();
default:
LOG(FATAL) << "Unknown ISA " << isa;
UNREACHABLE();
}
}
static constexpr size_t kDefaultStackOverflowReservedBytes = 16 * KB;
static constexpr size_t kMipsStackOverflowReservedBytes = kDefaultStackOverflowReservedBytes;
static constexpr size_t kMips64StackOverflowReservedBytes = kDefaultStackOverflowReservedBytes;
static constexpr size_t kArmStackOverflowReservedBytes = 8 * KB;
static constexpr size_t kArm64StackOverflowReservedBytes = 8 * KB;
static constexpr size_t kX86StackOverflowReservedBytes = 8 * KB;
static constexpr size_t kX86_64StackOverflowReservedBytes = 8 * KB;
size_t GetStackOverflowReservedBytes(InstructionSet isa) {
switch (isa) {
case kArm: // Intentional fall-through.
case kThumb2:
return kArmStackOverflowReservedBytes;
case kArm64:
return kArm64StackOverflowReservedBytes;
case kMips:
return kMipsStackOverflowReservedBytes;
case kMips64:
return kMips64StackOverflowReservedBytes;
case kX86:
return kX86StackOverflowReservedBytes;
case kX86_64:
return kX86_64StackOverflowReservedBytes;
case kNone:
LOG(FATAL) << "kNone has no stack overflow size";
UNREACHABLE();
default:
LOG(FATAL) << "Unknown instruction set" << isa;
UNREACHABLE();
}
}
} // namespace art
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