mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-22 18:54:02 +01:00
c5632126fc
This creates a new library called BinaryFormat that has all of the headers from llvm/Support containing structure and layout definitions for various types of binary formats like dwarf, coff, elf, etc as well as the code for identifying a file from its magic. Differential Revision: https://reviews.llvm.org/D33843 llvm-svn: 304864
99 lines
3.0 KiB
C++
99 lines
3.0 KiB
C++
//===- MCAsmInfoDarwin.cpp - Darwin asm properties ------------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file defines target asm properties related what form asm statements
|
|
// should take in general on Darwin-based targets
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/MC/MCAsmInfoDarwin.h"
|
|
#include "llvm/BinaryFormat/MachO.h"
|
|
#include "llvm/MC/MCDirectives.h"
|
|
#include "llvm/MC/MCSectionMachO.h"
|
|
|
|
using namespace llvm;
|
|
|
|
bool MCAsmInfoDarwin::isSectionAtomizableBySymbols(
|
|
const MCSection &Section) const {
|
|
const MCSectionMachO &SMO = static_cast<const MCSectionMachO &>(Section);
|
|
|
|
// Sections holding 1 byte strings are atomized based on the data they
|
|
// contain.
|
|
// Sections holding 2 byte strings require symbols in order to be atomized.
|
|
// There is no dedicated section for 4 byte strings.
|
|
if (SMO.getType() == MachO::S_CSTRING_LITERALS)
|
|
return false;
|
|
|
|
if (SMO.getSegmentName() == "__DATA" && SMO.getSectionName() == "__cfstring")
|
|
return false;
|
|
|
|
if (SMO.getSegmentName() == "__DATA" &&
|
|
SMO.getSectionName() == "__objc_classrefs")
|
|
return false;
|
|
|
|
switch (SMO.getType()) {
|
|
default:
|
|
return true;
|
|
|
|
// These sections are atomized at the element boundaries without using
|
|
// symbols.
|
|
case MachO::S_4BYTE_LITERALS:
|
|
case MachO::S_8BYTE_LITERALS:
|
|
case MachO::S_16BYTE_LITERALS:
|
|
case MachO::S_LITERAL_POINTERS:
|
|
case MachO::S_NON_LAZY_SYMBOL_POINTERS:
|
|
case MachO::S_LAZY_SYMBOL_POINTERS:
|
|
case MachO::S_THREAD_LOCAL_VARIABLE_POINTERS:
|
|
case MachO::S_MOD_INIT_FUNC_POINTERS:
|
|
case MachO::S_MOD_TERM_FUNC_POINTERS:
|
|
case MachO::S_INTERPOSING:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
MCAsmInfoDarwin::MCAsmInfoDarwin() {
|
|
// Common settings for all Darwin targets.
|
|
// Syntax:
|
|
LinkerPrivateGlobalPrefix = "l";
|
|
HasSingleParameterDotFile = false;
|
|
HasSubsectionsViaSymbols = true;
|
|
|
|
AlignmentIsInBytes = false;
|
|
COMMDirectiveAlignmentIsInBytes = false;
|
|
LCOMMDirectiveAlignmentType = LCOMM::Log2Alignment;
|
|
InlineAsmStart = " InlineAsm Start";
|
|
InlineAsmEnd = " InlineAsm End";
|
|
|
|
// Directives:
|
|
HasWeakDefDirective = true;
|
|
HasWeakDefCanBeHiddenDirective = true;
|
|
WeakRefDirective = "\t.weak_reference ";
|
|
ZeroDirective = "\t.space\t"; // ".space N" emits N zeros.
|
|
HasMachoZeroFillDirective = true; // Uses .zerofill
|
|
HasMachoTBSSDirective = true; // Uses .tbss
|
|
|
|
// FIXME: Change this once MC is the system assembler.
|
|
HasAggressiveSymbolFolding = false;
|
|
|
|
HiddenVisibilityAttr = MCSA_PrivateExtern;
|
|
HiddenDeclarationVisibilityAttr = MCSA_Invalid;
|
|
|
|
// Doesn't support protected visibility.
|
|
ProtectedVisibilityAttr = MCSA_Invalid;
|
|
|
|
HasDotTypeDotSizeDirective = false;
|
|
HasNoDeadStrip = true;
|
|
HasAltEntry = true;
|
|
|
|
DwarfUsesRelocationsAcrossSections = false;
|
|
|
|
UseIntegratedAssembler = true;
|
|
SetDirectiveSuppressesReloc = true;
|
|
}
|