1 //===-- ARMWinCOFFObjectWriter.cpp - ARM Windows COFF Object Writer -- C++ -==//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "MCTargetDesc/ARMFixupKinds.h"
11 #include "llvm/MC/MCFixup.h"
12 #include "llvm/MC/MCValue.h"
13 #include "llvm/MC/MCWinCOFFObjectWriter.h"
14 #include "llvm/Support/COFF.h"
15 #include "llvm/Support/Debug.h"
20 class ARMWinCOFFObjectWriter : public MCWinCOFFObjectTargetWriter {
22 ARMWinCOFFObjectWriter(bool Is64Bit)
23 : MCWinCOFFObjectTargetWriter(COFF::IMAGE_FILE_MACHINE_ARMNT) {
24 assert(!Is64Bit && "AArch64 support not yet implemented");
26 virtual ~ARMWinCOFFObjectWriter() { }
28 unsigned getRelocType(const MCValue &Target, const MCFixup &Fixup,
29 bool IsCrossSection) const override;
32 unsigned ARMWinCOFFObjectWriter::getRelocType(const MCValue &Target,
34 bool IsCrossSection) const {
35 assert(getMachine() == COFF::IMAGE_FILE_MACHINE_ARMNT &&
36 "AArch64 support not yet implemented");
38 MCSymbolRefExpr::VariantKind Modifier =
39 Target.isAbsolute() ? MCSymbolRefExpr::VK_None : Target.getSymA()->getKind();
41 switch (static_cast<unsigned>(Fixup.getKind())) {
42 default: llvm_unreachable("unsupported relocation type");
45 case MCSymbolRefExpr::VK_COFF_IMGREL32:
46 return COFF::IMAGE_REL_ARM_ADDR32NB;
47 case MCSymbolRefExpr::VK_SECREL:
48 return COFF::IMAGE_REL_ARM_SECREL;
50 return COFF::IMAGE_REL_ARM_ADDR32;
52 case ARM::fixup_t2_condbranch:
53 return COFF::IMAGE_REL_ARM_BRANCH20T;
54 case ARM::fixup_t2_uncondbranch:
55 return COFF::IMAGE_REL_ARM_BRANCH24T;
56 case ARM::fixup_arm_thumb_bl:
57 case ARM::fixup_arm_thumb_blx:
58 return COFF::IMAGE_REL_ARM_BLX23T;
59 case ARM::fixup_t2_movw_lo16:
60 return COFF::IMAGE_REL_ARM_MOV32T;
61 case ARM::fixup_t2_movt_hi16:
62 llvm_unreachable("High-word for pair-wise relocations are contiguously "
63 "addressed as an IMAGE_REL_ARM_MOV32T relocation");
69 MCObjectWriter *createARMWinCOFFObjectWriter(raw_ostream &OS, bool Is64Bit) {
70 MCWinCOFFObjectTargetWriter *MOTW = new ARMWinCOFFObjectWriter(Is64Bit);
71 return createWinCOFFObjectWriter(MOTW, OS);