LLVM  10.0.0svn
AVRTargetObjectFile.cpp
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1 //===-- AVRTargetObjectFile.cpp - AVR Object Files ------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #include "AVRTargetObjectFile.h"
10 
11 #include "llvm/BinaryFormat/ELF.h"
12 #include "llvm/IR/DerivedTypes.h"
13 #include "llvm/IR/GlobalValue.h"
14 #include "llvm/IR/Mangler.h"
15 #include "llvm/MC/MCContext.h"
16 #include "llvm/MC/MCSectionELF.h"
17 
18 #include "AVR.h"
19 
20 namespace llvm {
22  Base::Initialize(Ctx, TM);
23  ProgmemDataSection =
24  Ctx.getELFSection(".progmem.data", ELF::SHT_PROGBITS, ELF::SHF_ALLOC);
25 }
26 
27 MCSection *
30  const TargetMachine &TM) const {
31  // Global values in flash memory are placed in the progmem.data section
32  // unless they already have a user assigned section.
33  if (AVR::isProgramMemoryAddress(GO) && !GO->hasSection())
34  return ProgmemDataSection;
35 
36  // Otherwise, we work the same way as ELF.
37  return Base::SelectSectionForGlobal(GO, Kind, TM);
38 }
39 } // end of namespace llvm
40 
Instances of this class represent a uniqued identifier for a section in the current translation unit...
Definition: MCSection.h:39
This class represents lattice values for constants.
Definition: AllocatorList.h:23
MCSection * SelectSectionForGlobal(const GlobalObject *GO, SectionKind Kind, const TargetMachine &TM) const override
MCSection * SelectSectionForGlobal(const GlobalObject *GO, SectionKind Kind, const TargetMachine &TM) const override
bool isProgramMemoryAddress(T *V)
Checks if a given type is a pointer to program memory.
Definition: AVR.h:43
Context object for machine code objects.
Definition: MCContext.h:65
SectionKind - This is a simple POD value that classifies the properties of a section.
Definition: SectionKind.h:22
bool hasSection() const
Check if this global has a custom object file section.
Definition: GlobalObject.h:101
MCSectionELF * getELFSection(const Twine &Section, unsigned Type, unsigned Flags)
Definition: MCContext.h:424
Primary interface to the complete machine description for the target machine.
Definition: TargetMachine.h:65
void Initialize(MCContext &Ctx, const TargetMachine &TM) override
This method must be called before any actual lowering is done.
void Initialize(MCContext &ctx, const TargetMachine &TM) override
This method must be called before any actual lowering is done.