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upload android base code part3

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August 2018-08-08 16:48:17 +08:00
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android/art/runtime/arch/instruction_set.cc Normal file
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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 "android-base/logging.h"
#include "base/bit_utils.h"
#include "globals.h"
namespace art {
void InstructionSetAbort(InstructionSet isa) {
switch (isa) {
case kArm:
case kThumb2:
case kArm64:
case kX86:
case kX86_64:
case kMips:
case kMips64:
case kNone:
LOG(FATAL) << "Unsupported instruction set " << isa;
UNREACHABLE();
}
LOG(FATAL) << "Unknown ISA " << isa;
UNREACHABLE();
}
const char* GetInstructionSetString(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";
}
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();
}
LOG(FATAL) << "Unknown ISA " << isa;
UNREACHABLE();
}
#if !defined(ART_STACK_OVERFLOW_GAP_arm) || !defined(ART_STACK_OVERFLOW_GAP_arm64) || \
!defined(ART_STACK_OVERFLOW_GAP_mips) || !defined(ART_STACK_OVERFLOW_GAP_mips64) || \
!defined(ART_STACK_OVERFLOW_GAP_x86) || !defined(ART_STACK_OVERFLOW_GAP_x86_64)
#error "Missing defines for stack overflow gap"
#endif
static constexpr size_t kArmStackOverflowReservedBytes = ART_STACK_OVERFLOW_GAP_arm;
static constexpr size_t kArm64StackOverflowReservedBytes = ART_STACK_OVERFLOW_GAP_arm64;
static constexpr size_t kMipsStackOverflowReservedBytes = ART_STACK_OVERFLOW_GAP_mips;
static constexpr size_t kMips64StackOverflowReservedBytes = ART_STACK_OVERFLOW_GAP_mips64;
static constexpr size_t kX86StackOverflowReservedBytes = ART_STACK_OVERFLOW_GAP_x86;
static constexpr size_t kX86_64StackOverflowReservedBytes = ART_STACK_OVERFLOW_GAP_x86_64;
static_assert(IsAligned<kPageSize>(kArmStackOverflowReservedBytes), "ARM gap not page aligned");
static_assert(IsAligned<kPageSize>(kArm64StackOverflowReservedBytes), "ARM64 gap not page aligned");
static_assert(IsAligned<kPageSize>(kMipsStackOverflowReservedBytes), "Mips gap not page aligned");
static_assert(IsAligned<kPageSize>(kMips64StackOverflowReservedBytes),
"Mips64 gap not page aligned");
static_assert(IsAligned<kPageSize>(kX86StackOverflowReservedBytes), "X86 gap not page aligned");
static_assert(IsAligned<kPageSize>(kX86_64StackOverflowReservedBytes),
"X86_64 gap not page aligned");
#if !defined(ART_FRAME_SIZE_LIMIT)
#error "ART frame size limit missing"
#endif
// TODO: Should we require an extra page (RoundUp(SIZE) + kPageSize)?
static_assert(ART_FRAME_SIZE_LIMIT < kArmStackOverflowReservedBytes, "Frame size limit too large");
static_assert(ART_FRAME_SIZE_LIMIT < kArm64StackOverflowReservedBytes,
"Frame size limit too large");
static_assert(ART_FRAME_SIZE_LIMIT < kMipsStackOverflowReservedBytes,
"Frame size limit too large");
static_assert(ART_FRAME_SIZE_LIMIT < kMips64StackOverflowReservedBytes,
"Frame size limit too large");
static_assert(ART_FRAME_SIZE_LIMIT < kX86StackOverflowReservedBytes,
"Frame size limit too large");
static_assert(ART_FRAME_SIZE_LIMIT < kX86_64StackOverflowReservedBytes,
"Frame size limit too large");
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();
}
LOG(FATAL) << "Unknown instruction set" << isa;
UNREACHABLE();
}
} // namespace art