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llvm-mirror/lib/Support/ARMAttributeParser.cpp
Simon Pilgrim 52fd4336ea ARMAttributeParser - fix shadow variable name warnings from decodeULEB128 calls. NFCI. 
Consistently rename the Length attribute to DecodeLength in decodeULEB128 calls.
2019-11-02 20:12:59 +00:00

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//===--- ARMAttributeParser.cpp - ARM Attribute Information Printer -------===//
//
// 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/Support/ARMAttributeParser.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/Support/LEB128.h"
#include "llvm/Support/ScopedPrinter.h"
using namespace llvm;
using namespace llvm::ARMBuildAttrs;
static const EnumEntry<unsigned> TagNames[] = {
{ "Tag_File", ARMBuildAttrs::File },
{ "Tag_Section", ARMBuildAttrs::Section },
{ "Tag_Symbol", ARMBuildAttrs::Symbol },
};
namespace llvm {
#define ATTRIBUTE_HANDLER(Attr_) \
{ ARMBuildAttrs::Attr_, &ARMAttributeParser::Attr_ }
const ARMAttributeParser::DisplayHandler
ARMAttributeParser::DisplayRoutines[] = {
{ ARMBuildAttrs::CPU_raw_name, &ARMAttributeParser::StringAttribute, },
{ ARMBuildAttrs::CPU_name, &ARMAttributeParser::StringAttribute },
ATTRIBUTE_HANDLER(CPU_arch),
ATTRIBUTE_HANDLER(CPU_arch_profile),
ATTRIBUTE_HANDLER(ARM_ISA_use),
ATTRIBUTE_HANDLER(THUMB_ISA_use),
ATTRIBUTE_HANDLER(FP_arch),
ATTRIBUTE_HANDLER(WMMX_arch),
ATTRIBUTE_HANDLER(Advanced_SIMD_arch),
ATTRIBUTE_HANDLER(MVE_arch),
ATTRIBUTE_HANDLER(PCS_config),
ATTRIBUTE_HANDLER(ABI_PCS_R9_use),
ATTRIBUTE_HANDLER(ABI_PCS_RW_data),
ATTRIBUTE_HANDLER(ABI_PCS_RO_data),
ATTRIBUTE_HANDLER(ABI_PCS_GOT_use),
ATTRIBUTE_HANDLER(ABI_PCS_wchar_t),
ATTRIBUTE_HANDLER(ABI_FP_rounding),
ATTRIBUTE_HANDLER(ABI_FP_denormal),
ATTRIBUTE_HANDLER(ABI_FP_exceptions),
ATTRIBUTE_HANDLER(ABI_FP_user_exceptions),
ATTRIBUTE_HANDLER(ABI_FP_number_model),
ATTRIBUTE_HANDLER(ABI_align_needed),
ATTRIBUTE_HANDLER(ABI_align_preserved),
ATTRIBUTE_HANDLER(ABI_enum_size),
ATTRIBUTE_HANDLER(ABI_HardFP_use),
ATTRIBUTE_HANDLER(ABI_VFP_args),
ATTRIBUTE_HANDLER(ABI_WMMX_args),
ATTRIBUTE_HANDLER(ABI_optimization_goals),
ATTRIBUTE_HANDLER(ABI_FP_optimization_goals),
ATTRIBUTE_HANDLER(compatibility),
ATTRIBUTE_HANDLER(CPU_unaligned_access),
ATTRIBUTE_HANDLER(FP_HP_extension),
ATTRIBUTE_HANDLER(ABI_FP_16bit_format),
ATTRIBUTE_HANDLER(MPextension_use),
ATTRIBUTE_HANDLER(DIV_use),
ATTRIBUTE_HANDLER(DSP_extension),
ATTRIBUTE_HANDLER(T2EE_use),
ATTRIBUTE_HANDLER(Virtualization_use),
ATTRIBUTE_HANDLER(nodefaults)
};
#undef ATTRIBUTE_HANDLER
uint64_t ARMAttributeParser::ParseInteger(const uint8_t *Data,
uint32_t &Offset) {
unsigned DecodeLength;
uint64_t Value = decodeULEB128(Data + Offset, &DecodeLength);
Offset += DecodeLength;
return Value;
}
StringRef ARMAttributeParser::ParseString(const uint8_t *Data,
uint32_t &Offset) {
const char *String = reinterpret_cast<const char*>(Data + Offset);
size_t Length = std::strlen(String);
Offset = Offset + Length + 1;
return StringRef(String, Length);
}
void ARMAttributeParser::IntegerAttribute(AttrType Tag, const uint8_t *Data,
uint32_t &Offset) {
uint64_t Value = ParseInteger(Data, Offset);
Attributes.insert(std::make_pair(Tag, Value));
if (SW)
SW->printNumber(ARMBuildAttrs::AttrTypeAsString(Tag), Value);
}
void ARMAttributeParser::StringAttribute(AttrType Tag, const uint8_t *Data,
uint32_t &Offset) {
StringRef TagName = ARMBuildAttrs::AttrTypeAsString(Tag, /*TagPrefix*/false);
StringRef ValueDesc = ParseString(Data, Offset);
if (SW) {
DictScope AS(*SW, "Attribute");
SW->printNumber("Tag", Tag);
if (!TagName.empty())
SW->printString("TagName", TagName);
SW->printString("Value", ValueDesc);
}
}
void ARMAttributeParser::PrintAttribute(unsigned Tag, unsigned Value,
StringRef ValueDesc) {
Attributes.insert(std::make_pair(Tag, Value));
if (SW) {
StringRef TagName = ARMBuildAttrs::AttrTypeAsString(Tag,
/*TagPrefix*/false);
DictScope AS(*SW, "Attribute");
SW->printNumber("Tag", Tag);
SW->printNumber("Value", Value);
if (!TagName.empty())
SW->printString("TagName", TagName);
if (!ValueDesc.empty())
SW->printString("Description", ValueDesc);
}
}
void ARMAttributeParser::CPU_arch(AttrType Tag, const uint8_t *Data,
uint32_t &Offset) {
static const char *const Strings[] = {
"Pre-v4", "ARM v4", "ARM v4T", "ARM v5T", "ARM v5TE", "ARM v5TEJ", "ARM v6",
"ARM v6KZ", "ARM v6T2", "ARM v6K", "ARM v7", "ARM v6-M", "ARM v6S-M",
"ARM v7E-M", "ARM v8", nullptr,
"ARM v8-M Baseline", "ARM v8-M Mainline", nullptr, nullptr, nullptr,
"ARM v8.1-M Mainline"
};
uint64_t Value = ParseInteger(Data, Offset);
StringRef ValueDesc =
(Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
PrintAttribute(Tag, Value, ValueDesc);
}
void ARMAttributeParser::CPU_arch_profile(AttrType Tag, const uint8_t *Data,
uint32_t &Offset) {
uint64_t Encoded = ParseInteger(Data, Offset);
StringRef Profile;
switch (Encoded) {
default: Profile = "Unknown"; break;
case 'A': Profile = "Application"; break;
case 'R': Profile = "Real-time"; break;
case 'M': Profile = "Microcontroller"; break;
case 'S': Profile = "Classic"; break;
case 0: Profile = "None"; break;
}
PrintAttribute(Tag, Encoded, Profile);
}
void ARMAttributeParser::ARM_ISA_use(AttrType Tag, const uint8_t *Data,
uint32_t &Offset) {
static const char *const Strings[] = { "Not Permitted", "Permitted" };
uint64_t Value = ParseInteger(Data, Offset);
StringRef ValueDesc =
(Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
PrintAttribute(Tag, Value, ValueDesc);
}
void ARMAttributeParser::THUMB_ISA_use(AttrType Tag, const uint8_t *Data,
uint32_t &Offset) {
static const char *const Strings[] = { "Not Permitted", "Thumb-1", "Thumb-2" };
uint64_t Value = ParseInteger(Data, Offset);
StringRef ValueDesc =
(Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
PrintAttribute(Tag, Value, ValueDesc);
}
void ARMAttributeParser::FP_arch(AttrType Tag, const uint8_t *Data,
uint32_t &Offset) {
static const char *const Strings[] = {
"Not Permitted", "VFPv1", "VFPv2", "VFPv3", "VFPv3-D16", "VFPv4",
"VFPv4-D16", "ARMv8-a FP", "ARMv8-a FP-D16"
};
uint64_t Value = ParseInteger(Data, Offset);
StringRef ValueDesc =
(Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
PrintAttribute(Tag, Value, ValueDesc);
}
void ARMAttributeParser::WMMX_arch(AttrType Tag, const uint8_t *Data,
uint32_t &Offset) {
static const char *const Strings[] = { "Not Permitted", "WMMXv1", "WMMXv2" };
uint64_t Value = ParseInteger(Data, Offset);
StringRef ValueDesc =
(Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
PrintAttribute(Tag, Value, ValueDesc);
}
void ARMAttributeParser::Advanced_SIMD_arch(AttrType Tag, const uint8_t *Data,
uint32_t &Offset) {
static const char *const Strings[] = {
"Not Permitted", "NEONv1", "NEONv2+FMA", "ARMv8-a NEON", "ARMv8.1-a NEON"
};
uint64_t Value = ParseInteger(Data, Offset);
StringRef ValueDesc =
(Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
PrintAttribute(Tag, Value, ValueDesc);
}
void ARMAttributeParser::MVE_arch(AttrType Tag, const uint8_t *Data,
uint32_t &Offset) {
static const char *const Strings[] = {
"Not Permitted", "MVE integer", "MVE integer and float"
};
uint64_t Value = ParseInteger(Data, Offset);
StringRef ValueDesc =
(Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
PrintAttribute(Tag, Value, ValueDesc);
}
void ARMAttributeParser::PCS_config(AttrType Tag, const uint8_t *Data,
uint32_t &Offset) {
static const char *const Strings[] = {
"None", "Bare Platform", "Linux Application", "Linux DSO", "Palm OS 2004",
"Reserved (Palm OS)", "Symbian OS 2004", "Reserved (Symbian OS)"
};
uint64_t Value = ParseInteger(Data, Offset);
StringRef ValueDesc =
(Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
PrintAttribute(Tag, Value, ValueDesc);
}
void ARMAttributeParser::ABI_PCS_R9_use(AttrType Tag, const uint8_t *Data,
uint32_t &Offset) {
static const char *const Strings[] = { "v6", "Static Base", "TLS", "Unused" };
uint64_t Value = ParseInteger(Data, Offset);
StringRef ValueDesc =
(Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
PrintAttribute(Tag, Value, ValueDesc);
}
void ARMAttributeParser::ABI_PCS_RW_data(AttrType Tag, const uint8_t *Data,
uint32_t &Offset) {
static const char *const Strings[] = {
"Absolute", "PC-relative", "SB-relative", "Not Permitted"
};
uint64_t Value = ParseInteger(Data, Offset);
StringRef ValueDesc =
(Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
PrintAttribute(Tag, Value, ValueDesc);
}
void ARMAttributeParser::ABI_PCS_RO_data(AttrType Tag, const uint8_t *Data,
uint32_t &Offset) {
static const char *const Strings[] = {
"Absolute", "PC-relative", "Not Permitted"
};
uint64_t Value = ParseInteger(Data, Offset);
StringRef ValueDesc =
(Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
PrintAttribute(Tag, Value, ValueDesc);
}
void ARMAttributeParser::ABI_PCS_GOT_use(AttrType Tag, const uint8_t *Data,
uint32_t &Offset) {
static const char *const Strings[] = {
"Not Permitted", "Direct", "GOT-Indirect"
};
uint64_t Value = ParseInteger(Data, Offset);
StringRef ValueDesc =
(Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
PrintAttribute(Tag, Value, ValueDesc);
}
void ARMAttributeParser::ABI_PCS_wchar_t(AttrType Tag, const uint8_t *Data,
uint32_t &Offset) {
static const char *const Strings[] = {
"Not Permitted", "Unknown", "2-byte", "Unknown", "4-byte"
};
uint64_t Value = ParseInteger(Data, Offset);
StringRef ValueDesc =
(Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
PrintAttribute(Tag, Value, ValueDesc);
}
void ARMAttributeParser::ABI_FP_rounding(AttrType Tag, const uint8_t *Data,
uint32_t &Offset) {
static const char *const Strings[] = { "IEEE-754", "Runtime" };
uint64_t Value = ParseInteger(Data, Offset);
StringRef ValueDesc =
(Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
PrintAttribute(Tag, Value, ValueDesc);
}
void ARMAttributeParser::ABI_FP_denormal(AttrType Tag, const uint8_t *Data,
uint32_t &Offset) {
static const char *const Strings[] = {
"Unsupported", "IEEE-754", "Sign Only"
};
uint64_t Value = ParseInteger(Data, Offset);
StringRef ValueDesc =
(Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
PrintAttribute(Tag, Value, ValueDesc);
}
void ARMAttributeParser::ABI_FP_exceptions(AttrType Tag, const uint8_t *Data,
uint32_t &Offset) {
static const char *const Strings[] = { "Not Permitted", "IEEE-754" };
uint64_t Value = ParseInteger(Data, Offset);
StringRef ValueDesc =
(Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
PrintAttribute(Tag, Value, ValueDesc);
}
void ARMAttributeParser::ABI_FP_user_exceptions(AttrType Tag,
const uint8_t *Data,
uint32_t &Offset) {
static const char *const Strings[] = { "Not Permitted", "IEEE-754" };
uint64_t Value = ParseInteger(Data, Offset);
StringRef ValueDesc =
(Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
PrintAttribute(Tag, Value, ValueDesc);
}
void ARMAttributeParser::ABI_FP_number_model(AttrType Tag, const uint8_t *Data,
uint32_t &Offset) {
static const char *const Strings[] = {
"Not Permitted", "Finite Only", "RTABI", "IEEE-754"
};
uint64_t Value = ParseInteger(Data, Offset);
StringRef ValueDesc =
(Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
PrintAttribute(Tag, Value, ValueDesc);
}
void ARMAttributeParser::ABI_align_needed(AttrType Tag, const uint8_t *Data,
uint32_t &Offset) {
static const char *const Strings[] = {
"Not Permitted", "8-byte alignment", "4-byte alignment", "Reserved"
};
uint64_t Value = ParseInteger(Data, Offset);
std::string Description;
if (Value < array_lengthof(Strings))
Description = std::string(Strings[Value]);
else if (Value <= 12)
Description = std::string("8-byte alignment, ") + utostr(1ULL << Value)
+ std::string("-byte extended alignment");
else
Description = "Invalid";
PrintAttribute(Tag, Value, Description);
}
void ARMAttributeParser::ABI_align_preserved(AttrType Tag, const uint8_t *Data,
uint32_t &Offset) {
static const char *const Strings[] = {
"Not Required", "8-byte data alignment", "8-byte data and code alignment",
"Reserved"
};
uint64_t Value = ParseInteger(Data, Offset);
std::string Description;
if (Value < array_lengthof(Strings))
Description = std::string(Strings[Value]);
else if (Value <= 12)
Description = std::string("8-byte stack alignment, ") +
utostr(1ULL << Value) + std::string("-byte data alignment");
else
Description = "Invalid";
PrintAttribute(Tag, Value, Description);
}
void ARMAttributeParser::ABI_enum_size(AttrType Tag, const uint8_t *Data,
uint32_t &Offset) {
static const char *const Strings[] = {
"Not Permitted", "Packed", "Int32", "External Int32"
};
uint64_t Value = ParseInteger(Data, Offset);
StringRef ValueDesc =
(Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
PrintAttribute(Tag, Value, ValueDesc);
}
void ARMAttributeParser::ABI_HardFP_use(AttrType Tag, const uint8_t *Data,
uint32_t &Offset) {
static const char *const Strings[] = {
"Tag_FP_arch", "Single-Precision", "Reserved", "Tag_FP_arch (deprecated)"
};
uint64_t Value = ParseInteger(Data, Offset);
StringRef ValueDesc =
(Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
PrintAttribute(Tag, Value, ValueDesc);
}
void ARMAttributeParser::ABI_VFP_args(AttrType Tag, const uint8_t *Data,
uint32_t &Offset) {
static const char *const Strings[] = {
"AAPCS", "AAPCS VFP", "Custom", "Not Permitted"
};
uint64_t Value = ParseInteger(Data, Offset);
StringRef ValueDesc =
(Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
PrintAttribute(Tag, Value, ValueDesc);
}
void ARMAttributeParser::ABI_WMMX_args(AttrType Tag, const uint8_t *Data,
uint32_t &Offset) {
static const char *const Strings[] = { "AAPCS", "iWMMX", "Custom" };
uint64_t Value = ParseInteger(Data, Offset);
StringRef ValueDesc =
(Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
PrintAttribute(Tag, Value, ValueDesc);
}
void ARMAttributeParser::ABI_optimization_goals(AttrType Tag,
const uint8_t *Data,
uint32_t &Offset) {
static const char *const Strings[] = {
"None", "Speed", "Aggressive Speed", "Size", "Aggressive Size", "Debugging",
"Best Debugging"
};
uint64_t Value = ParseInteger(Data, Offset);
StringRef ValueDesc =
(Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
PrintAttribute(Tag, Value, ValueDesc);
}
void ARMAttributeParser::ABI_FP_optimization_goals(AttrType Tag,
const uint8_t *Data,
uint32_t &Offset) {
static const char *const Strings[] = {
"None", "Speed", "Aggressive Speed", "Size", "Aggressive Size", "Accuracy",
"Best Accuracy"
};
uint64_t Value = ParseInteger(Data, Offset);
StringRef ValueDesc =
(Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
PrintAttribute(Tag, Value, ValueDesc);
}
void ARMAttributeParser::compatibility(AttrType Tag, const uint8_t *Data,
uint32_t &Offset) {
uint64_t Integer = ParseInteger(Data, Offset);
StringRef String = ParseString(Data, Offset);
if (SW) {
DictScope AS(*SW, "Attribute");
SW->printNumber("Tag", Tag);
SW->startLine() << "Value: " << Integer << ", " << String << '\n';
SW->printString("TagName", AttrTypeAsString(Tag, /*TagPrefix*/false));
switch (Integer) {
case 0:
SW->printString("Description", StringRef("No Specific Requirements"));
break;
case 1:
SW->printString("Description", StringRef("AEABI Conformant"));
break;
default:
SW->printString("Description", StringRef("AEABI Non-Conformant"));
break;
}
}
}
void ARMAttributeParser::CPU_unaligned_access(AttrType Tag, const uint8_t *Data,
uint32_t &Offset) {
static const char *const Strings[] = { "Not Permitted", "v6-style" };
uint64_t Value = ParseInteger(Data, Offset);
StringRef ValueDesc =
(Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
PrintAttribute(Tag, Value, ValueDesc);
}
void ARMAttributeParser::FP_HP_extension(AttrType Tag, const uint8_t *Data,
uint32_t &Offset) {
static const char *const Strings[] = { "If Available", "Permitted" };
uint64_t Value = ParseInteger(Data, Offset);
StringRef ValueDesc =
(Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
PrintAttribute(Tag, Value, ValueDesc);
}
void ARMAttributeParser::ABI_FP_16bit_format(AttrType Tag, const uint8_t *Data,
uint32_t &Offset) {
static const char *const Strings[] = { "Not Permitted", "IEEE-754", "VFPv3" };
uint64_t Value = ParseInteger(Data, Offset);
StringRef ValueDesc =
(Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
PrintAttribute(Tag, Value, ValueDesc);
}
void ARMAttributeParser::MPextension_use(AttrType Tag, const uint8_t *Data,
uint32_t &Offset) {
static const char *const Strings[] = { "Not Permitted", "Permitted" };
uint64_t Value = ParseInteger(Data, Offset);
StringRef ValueDesc =
(Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
PrintAttribute(Tag, Value, ValueDesc);
}
void ARMAttributeParser::DIV_use(AttrType Tag, const uint8_t *Data,
uint32_t &Offset) {
static const char *const Strings[] = {
"If Available", "Not Permitted", "Permitted"
};
uint64_t Value = ParseInteger(Data, Offset);
StringRef ValueDesc =
(Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
PrintAttribute(Tag, Value, ValueDesc);
}
void ARMAttributeParser::DSP_extension(AttrType Tag, const uint8_t *Data,
uint32_t &Offset) {
static const char *const Strings[] = { "Not Permitted", "Permitted" };
uint64_t Value = ParseInteger(Data, Offset);
StringRef ValueDesc =
(Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
PrintAttribute(Tag, Value, ValueDesc);
}
void ARMAttributeParser::T2EE_use(AttrType Tag, const uint8_t *Data,
uint32_t &Offset) {
static const char *const Strings[] = { "Not Permitted", "Permitted" };
uint64_t Value = ParseInteger(Data, Offset);
StringRef ValueDesc =
(Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
PrintAttribute(Tag, Value, ValueDesc);
}
void ARMAttributeParser::Virtualization_use(AttrType Tag, const uint8_t *Data,
uint32_t &Offset) {
static const char *const Strings[] = {
"Not Permitted", "TrustZone", "Virtualization Extensions",
"TrustZone + Virtualization Extensions"
};
uint64_t Value = ParseInteger(Data, Offset);
StringRef ValueDesc =
(Value < array_lengthof(Strings)) ? Strings[Value] : nullptr;
PrintAttribute(Tag, Value, ValueDesc);
}
void ARMAttributeParser::nodefaults(AttrType Tag, const uint8_t *Data,
uint32_t &Offset) {
uint64_t Value = ParseInteger(Data, Offset);
PrintAttribute(Tag, Value, "Unspecified Tags UNDEFINED");
}
void ARMAttributeParser::ParseIndexList(const uint8_t *Data, uint32_t &Offset,
SmallVectorImpl<uint8_t> &IndexList) {
for (;;) {
unsigned DecodeLength;
uint64_t Value = decodeULEB128(Data + Offset, &DecodeLength);
Offset += DecodeLength;
if (Value == 0)
break;
IndexList.push_back(Value);
}
}
void ARMAttributeParser::ParseAttributeList(const uint8_t *Data,
uint32_t &Offset, uint32_t Length) {
while (Offset < Length) {
unsigned DecodeLength;
uint64_t Tag = decodeULEB128(Data + Offset, &DecodeLength);
Offset += DecodeLength;
bool Handled = false;
for (unsigned AHI = 0, AHE = array_lengthof(DisplayRoutines);
AHI != AHE && !Handled; ++AHI) {
if (uint64_t(DisplayRoutines[AHI].Attribute) == Tag) {
(this->*DisplayRoutines[AHI].Routine)(ARMBuildAttrs::AttrType(Tag),
Data, Offset);
Handled = true;
break;
}
}
if (!Handled) {
if (Tag < 32) {
errs() << "unhandled AEABI Tag " << Tag
<< " (" << ARMBuildAttrs::AttrTypeAsString(Tag) << ")\n";
continue;
}
if (Tag % 2 == 0)
IntegerAttribute(ARMBuildAttrs::AttrType(Tag), Data, Offset);
else
StringAttribute(ARMBuildAttrs::AttrType(Tag), Data, Offset);
}
}
}
void ARMAttributeParser::ParseSubsection(const uint8_t *Data, uint32_t Length) {
uint32_t Offset = sizeof(uint32_t); /* SectionLength */
const char *VendorName = reinterpret_cast<const char*>(Data + Offset);
size_t VendorNameLength = std::strlen(VendorName);
Offset = Offset + VendorNameLength + 1;
if (SW) {
SW->printNumber("SectionLength", Length);
SW->printString("Vendor", StringRef(VendorName, VendorNameLength));
}
if (StringRef(VendorName, VendorNameLength).lower() != "aeabi") {
return;
}
while (Offset < Length) {
/// Tag_File | Tag_Section | Tag_Symbol uleb128:byte-size
uint8_t Tag = Data[Offset];
Offset = Offset + sizeof(Tag);
uint32_t Size =
*reinterpret_cast<const support::ulittle32_t*>(Data + Offset);
Offset = Offset + sizeof(Size);
if (SW) {
SW->printEnum("Tag", Tag, makeArrayRef(TagNames));
SW->printNumber("Size", Size);
}
if (Size > Length) {
errs() << "subsection length greater than section length\n";
return;
}
StringRef ScopeName, IndexName;
SmallVector<uint8_t, 8> Indicies;
switch (Tag) {
case ARMBuildAttrs::File:
ScopeName = "FileAttributes";
break;
case ARMBuildAttrs::Section:
ScopeName = "SectionAttributes";
IndexName = "Sections";
ParseIndexList(Data, Offset, Indicies);
break;
case ARMBuildAttrs::Symbol:
ScopeName = "SymbolAttributes";
IndexName = "Symbols";
ParseIndexList(Data, Offset, Indicies);
break;
default:
errs() << "unrecognised tag: 0x" << Twine::utohexstr(Tag) << '\n';
return;
}
if (SW) {
DictScope ASS(*SW, ScopeName);
if (!Indicies.empty())
SW->printList(IndexName, Indicies);
ParseAttributeList(Data, Offset, Length);
} else {
ParseAttributeList(Data, Offset, Length);
}
}
}
void ARMAttributeParser::Parse(ArrayRef<uint8_t> Section, bool isLittle) {
uint64_t Offset = 1;
unsigned SectionNumber = 0;
while (Offset < Section.size()) {
uint32_t SectionLength = isLittle ?
support::endian::read32le(Section.data() + Offset) :
support::endian::read32be(Section.data() + Offset);
if (SW) {
SW->startLine() << "Section " << ++SectionNumber << " {\n";
SW->indent();
}
if (SectionLength == 0 || (SectionLength + Offset) > Section.size()) {
errs() << "invalid subsection length " << SectionLength << " at offset "
<< Offset << "\n";
return;
}
ParseSubsection(Section.data() + Offset, SectionLength);
Offset = Offset + SectionLength;
if (SW) {
SW->unindent();
SW->startLine() << "}\n";
}
}
}
}
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