dd6029ff3a
There are several bugfixes in this update, but the most important one is to ensure __start_ and __stop_ symbols for linker sets and kernel module metadata are always emitted in object files: http://llvm.org/bugs/show_bug.cgi?id=9292 Before this fix, if you compiled kernel modules with clang, they would not be properly processed by kldxref, and if they had any dependencies, the kernel would fail to load those. Another problem occurred when attempting to mount a tmpfs filesystem, which would result in 'operation not supported by device'.
109 lines
3.0 KiB
C++
109 lines
3.0 KiB
C++
//===-- MCAsmInfo.cpp - Asm Info -------------------------------------------==//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines target asm properties related what form asm statements
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// should take.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/MC/MCAsmInfo.h"
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#include "llvm/Support/DataTypes.h"
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#include <cctype>
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#include <cstring>
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using namespace llvm;
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MCAsmInfo::MCAsmInfo() {
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HasSubsectionsViaSymbols = false;
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HasMachoZeroFillDirective = false;
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HasMachoTBSSDirective = false;
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HasStaticCtorDtorReferenceInStaticMode = false;
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LinkerRequiresNonEmptyDwarfLines = false;
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MaxInstLength = 4;
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PCSymbol = "$";
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SeparatorChar = ';';
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CommentColumn = 40;
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CommentString = "#";
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LabelSuffix = ":";
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GlobalPrefix = "";
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PrivateGlobalPrefix = ".";
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LinkerPrivateGlobalPrefix = "";
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InlineAsmStart = "APP";
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InlineAsmEnd = "NO_APP";
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AssemblerDialect = 0;
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AllowQuotesInName = false;
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AllowNameToStartWithDigit = false;
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AllowPeriodsInName = true;
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ZeroDirective = "\t.zero\t";
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AsciiDirective = "\t.ascii\t";
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AscizDirective = "\t.asciz\t";
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Data8bitsDirective = "\t.byte\t";
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Data16bitsDirective = "\t.short\t";
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Data32bitsDirective = "\t.long\t";
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Data64bitsDirective = "\t.quad\t";
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SunStyleELFSectionSwitchSyntax = false;
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UsesELFSectionDirectiveForBSS = false;
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AlignDirective = "\t.align\t";
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AlignmentIsInBytes = true;
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TextAlignFillValue = 0;
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GPRel32Directive = 0;
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GlobalDirective = "\t.globl\t";
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HasSetDirective = true;
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HasAggressiveSymbolFolding = true;
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HasLCOMMDirective = false;
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COMMDirectiveAlignmentIsInBytes = true;
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HasDotTypeDotSizeDirective = true;
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HasSingleParameterDotFile = true;
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HasNoDeadStrip = false;
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HasSymbolResolver = false;
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WeakRefDirective = 0;
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WeakDefDirective = 0;
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LinkOnceDirective = 0;
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HiddenVisibilityAttr = MCSA_Hidden;
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HiddenDeclarationVisibilityAttr = MCSA_Hidden;
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ProtectedVisibilityAttr = MCSA_Protected;
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HasLEB128 = false;
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SupportsDebugInformation = false;
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ExceptionsType = ExceptionHandling::None;
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DwarfRequiresFrameSection = true;
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DwarfUsesInlineInfoSection = false;
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DwarfUsesAbsoluteLabelForStmtList = true;
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DwarfSectionOffsetDirective = 0;
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DwarfUsesLabelOffsetForRanges = true;
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HasMicrosoftFastStdCallMangling = false;
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AsmTransCBE = 0;
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}
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MCAsmInfo::~MCAsmInfo() {
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}
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unsigned MCAsmInfo::getULEB128Size(unsigned Value) {
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unsigned Size = 0;
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do {
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Value >>= 7;
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Size += sizeof(int8_t);
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} while (Value);
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return Size;
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}
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unsigned MCAsmInfo::getSLEB128Size(int Value) {
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unsigned Size = 0;
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int Sign = Value >> (8 * sizeof(Value) - 1);
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bool IsMore;
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do {
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unsigned Byte = Value & 0x7f;
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Value >>= 7;
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IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
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Size += sizeof(int8_t);
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} while (IsMore);
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return Size;
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}
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