forked from OSchip/llvm-project
292 lines
9.6 KiB
C++
292 lines
9.6 KiB
C++
//===-- AArch64ELFObjectWriter.cpp - AArch64 ELF Writer -------------------===//
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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 handles ELF-specific object emission, converting LLVM's internal
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// fixups into the appropriate relocations.
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//
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//===----------------------------------------------------------------------===//
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#include "MCTargetDesc/AArch64FixupKinds.h"
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#include "MCTargetDesc/AArch64MCTargetDesc.h"
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#include "llvm/MC/MCELFObjectWriter.h"
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#include "llvm/MC/MCValue.h"
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#include "llvm/Support/ErrorHandling.h"
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using namespace llvm;
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namespace {
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class AArch64ELFObjectWriter : public MCELFObjectTargetWriter {
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public:
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AArch64ELFObjectWriter(uint8_t OSABI, bool IsLittleEndian);
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virtual ~AArch64ELFObjectWriter();
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protected:
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unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup,
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bool IsPCRel) const override;
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private:
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};
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}
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AArch64ELFObjectWriter::AArch64ELFObjectWriter(uint8_t OSABI, bool IsLittleEndian)
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: MCELFObjectTargetWriter(/*Is64Bit*/ true, OSABI, ELF::EM_AARCH64,
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/*HasRelocationAddend*/ true)
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{}
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AArch64ELFObjectWriter::~AArch64ELFObjectWriter()
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{}
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unsigned AArch64ELFObjectWriter::GetRelocType(const MCValue &Target,
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const MCFixup &Fixup,
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bool IsPCRel) const {
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unsigned Type;
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if (IsPCRel) {
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switch ((unsigned)Fixup.getKind()) {
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default:
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llvm_unreachable("Unimplemented fixup -> relocation");
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case FK_Data_8:
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return ELF::R_AARCH64_PREL64;
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case FK_Data_4:
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return ELF::R_AARCH64_PREL32;
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case FK_Data_2:
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return ELF::R_AARCH64_PREL16;
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case AArch64::fixup_a64_ld_prel:
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Type = ELF::R_AARCH64_LD_PREL_LO19;
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break;
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case AArch64::fixup_a64_adr_prel:
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Type = ELF::R_AARCH64_ADR_PREL_LO21;
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break;
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case AArch64::fixup_a64_adr_prel_page:
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Type = ELF::R_AARCH64_ADR_PREL_PG_HI21;
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break;
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case AArch64::fixup_a64_adr_prel_got_page:
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Type = ELF::R_AARCH64_ADR_GOT_PAGE;
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break;
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case AArch64::fixup_a64_tstbr:
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Type = ELF::R_AARCH64_TSTBR14;
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break;
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case AArch64::fixup_a64_condbr:
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Type = ELF::R_AARCH64_CONDBR19;
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break;
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case AArch64::fixup_a64_uncondbr:
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Type = ELF::R_AARCH64_JUMP26;
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break;
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case AArch64::fixup_a64_call:
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Type = ELF::R_AARCH64_CALL26;
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break;
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case AArch64::fixup_a64_adr_gottprel_page:
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Type = ELF::R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21;
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break;
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case AArch64::fixup_a64_ld_gottprel_prel19:
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Type = ELF::R_AARCH64_TLSIE_LD_GOTTPREL_PREL19;
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break;
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case AArch64::fixup_a64_tlsdesc_adr_page:
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Type = ELF::R_AARCH64_TLSDESC_ADR_PAGE;
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break;
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}
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} else {
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switch ((unsigned)Fixup.getKind()) {
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default:
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llvm_unreachable("Unimplemented fixup -> relocation");
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case FK_Data_8:
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return ELF::R_AARCH64_ABS64;
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case FK_Data_4:
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return ELF::R_AARCH64_ABS32;
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case FK_Data_2:
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return ELF::R_AARCH64_ABS16;
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case AArch64::fixup_a64_add_lo12:
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Type = ELF::R_AARCH64_ADD_ABS_LO12_NC;
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break;
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case AArch64::fixup_a64_ld64_got_lo12_nc:
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Type = ELF::R_AARCH64_LD64_GOT_LO12_NC;
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break;
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case AArch64::fixup_a64_ldst8_lo12:
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Type = ELF::R_AARCH64_LDST8_ABS_LO12_NC;
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break;
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case AArch64::fixup_a64_ldst16_lo12:
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Type = ELF::R_AARCH64_LDST16_ABS_LO12_NC;
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break;
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case AArch64::fixup_a64_ldst32_lo12:
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Type = ELF::R_AARCH64_LDST32_ABS_LO12_NC;
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break;
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case AArch64::fixup_a64_ldst64_lo12:
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Type = ELF::R_AARCH64_LDST64_ABS_LO12_NC;
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break;
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case AArch64::fixup_a64_ldst128_lo12:
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Type = ELF::R_AARCH64_LDST128_ABS_LO12_NC;
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break;
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case AArch64::fixup_a64_movw_uabs_g0:
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Type = ELF::R_AARCH64_MOVW_UABS_G0;
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break;
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case AArch64::fixup_a64_movw_uabs_g0_nc:
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Type = ELF::R_AARCH64_MOVW_UABS_G0_NC;
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break;
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case AArch64::fixup_a64_movw_uabs_g1:
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Type = ELF::R_AARCH64_MOVW_UABS_G1;
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break;
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case AArch64::fixup_a64_movw_uabs_g1_nc:
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Type = ELF::R_AARCH64_MOVW_UABS_G1_NC;
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break;
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case AArch64::fixup_a64_movw_uabs_g2:
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Type = ELF::R_AARCH64_MOVW_UABS_G2;
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break;
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case AArch64::fixup_a64_movw_uabs_g2_nc:
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Type = ELF::R_AARCH64_MOVW_UABS_G2_NC;
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break;
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case AArch64::fixup_a64_movw_uabs_g3:
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Type = ELF::R_AARCH64_MOVW_UABS_G3;
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break;
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case AArch64::fixup_a64_movw_sabs_g0:
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Type = ELF::R_AARCH64_MOVW_SABS_G0;
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break;
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case AArch64::fixup_a64_movw_sabs_g1:
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Type = ELF::R_AARCH64_MOVW_SABS_G1;
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break;
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case AArch64::fixup_a64_movw_sabs_g2:
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Type = ELF::R_AARCH64_MOVW_SABS_G2;
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break;
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// TLS Local-dynamic block
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case AArch64::fixup_a64_movw_dtprel_g2:
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Type = ELF::R_AARCH64_TLSLD_MOVW_DTPREL_G2;
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break;
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case AArch64::fixup_a64_movw_dtprel_g1:
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Type = ELF::R_AARCH64_TLSLD_MOVW_DTPREL_G1;
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break;
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case AArch64::fixup_a64_movw_dtprel_g1_nc:
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Type = ELF::R_AARCH64_TLSLD_MOVW_DTPREL_G1_NC;
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break;
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case AArch64::fixup_a64_movw_dtprel_g0:
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Type = ELF::R_AARCH64_TLSLD_MOVW_DTPREL_G0;
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break;
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case AArch64::fixup_a64_movw_dtprel_g0_nc:
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Type = ELF::R_AARCH64_TLSLD_MOVW_DTPREL_G0_NC;
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break;
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case AArch64::fixup_a64_add_dtprel_hi12:
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Type = ELF::R_AARCH64_TLSLD_ADD_DTPREL_HI12;
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break;
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case AArch64::fixup_a64_add_dtprel_lo12:
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Type = ELF::R_AARCH64_TLSLD_ADD_DTPREL_LO12;
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break;
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case AArch64::fixup_a64_add_dtprel_lo12_nc:
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Type = ELF::R_AARCH64_TLSLD_ADD_DTPREL_LO12_NC;
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break;
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case AArch64::fixup_a64_ldst8_dtprel_lo12:
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Type = ELF::R_AARCH64_TLSLD_LDST8_DTPREL_LO12;
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break;
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case AArch64::fixup_a64_ldst8_dtprel_lo12_nc:
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Type = ELF::R_AARCH64_TLSLD_LDST8_DTPREL_LO12_NC;
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break;
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case AArch64::fixup_a64_ldst16_dtprel_lo12:
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Type = ELF::R_AARCH64_TLSLD_LDST16_DTPREL_LO12;
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break;
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case AArch64::fixup_a64_ldst16_dtprel_lo12_nc:
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Type = ELF::R_AARCH64_TLSLD_LDST16_DTPREL_LO12_NC;
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break;
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case AArch64::fixup_a64_ldst32_dtprel_lo12:
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Type = ELF::R_AARCH64_TLSLD_LDST32_DTPREL_LO12;
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break;
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case AArch64::fixup_a64_ldst32_dtprel_lo12_nc:
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Type = ELF::R_AARCH64_TLSLD_LDST32_DTPREL_LO12_NC;
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break;
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case AArch64::fixup_a64_ldst64_dtprel_lo12:
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Type = ELF::R_AARCH64_TLSLD_LDST64_DTPREL_LO12;
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break;
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case AArch64::fixup_a64_ldst64_dtprel_lo12_nc:
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Type = ELF::R_AARCH64_TLSLD_LDST64_DTPREL_LO12_NC;
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break;
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// TLS initial-exec block
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case AArch64::fixup_a64_movw_gottprel_g1:
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Type = ELF::R_AARCH64_TLSIE_MOVW_GOTTPREL_G1;
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break;
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case AArch64::fixup_a64_movw_gottprel_g0_nc:
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Type = ELF::R_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC;
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break;
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case AArch64::fixup_a64_ld64_gottprel_lo12_nc:
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Type = ELF::R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC;
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break;
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// TLS local-exec block
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case AArch64::fixup_a64_movw_tprel_g2:
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Type = ELF::R_AARCH64_TLSLE_MOVW_TPREL_G2;
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break;
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case AArch64::fixup_a64_movw_tprel_g1:
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Type = ELF::R_AARCH64_TLSLE_MOVW_TPREL_G1;
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break;
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case AArch64::fixup_a64_movw_tprel_g1_nc:
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Type = ELF::R_AARCH64_TLSLE_MOVW_TPREL_G1_NC;
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break;
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case AArch64::fixup_a64_movw_tprel_g0:
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Type = ELF::R_AARCH64_TLSLE_MOVW_TPREL_G0;
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break;
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case AArch64::fixup_a64_movw_tprel_g0_nc:
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Type = ELF::R_AARCH64_TLSLE_MOVW_TPREL_G0_NC;
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break;
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case AArch64::fixup_a64_add_tprel_hi12:
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Type = ELF::R_AARCH64_TLSLE_ADD_TPREL_HI12;
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break;
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case AArch64::fixup_a64_add_tprel_lo12:
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Type = ELF::R_AARCH64_TLSLE_ADD_TPREL_LO12;
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break;
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case AArch64::fixup_a64_add_tprel_lo12_nc:
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Type = ELF::R_AARCH64_TLSLE_ADD_TPREL_LO12_NC;
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break;
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case AArch64::fixup_a64_ldst8_tprel_lo12:
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Type = ELF::R_AARCH64_TLSLE_LDST8_TPREL_LO12;
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break;
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case AArch64::fixup_a64_ldst8_tprel_lo12_nc:
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Type = ELF::R_AARCH64_TLSLE_LDST8_TPREL_LO12_NC;
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break;
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case AArch64::fixup_a64_ldst16_tprel_lo12:
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Type = ELF::R_AARCH64_TLSLE_LDST16_TPREL_LO12;
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break;
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case AArch64::fixup_a64_ldst16_tprel_lo12_nc:
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Type = ELF::R_AARCH64_TLSLE_LDST16_TPREL_LO12_NC;
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break;
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case AArch64::fixup_a64_ldst32_tprel_lo12:
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Type = ELF::R_AARCH64_TLSLE_LDST32_TPREL_LO12;
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break;
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case AArch64::fixup_a64_ldst32_tprel_lo12_nc:
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Type = ELF::R_AARCH64_TLSLE_LDST32_TPREL_LO12_NC;
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break;
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case AArch64::fixup_a64_ldst64_tprel_lo12:
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Type = ELF::R_AARCH64_TLSLE_LDST64_TPREL_LO12;
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break;
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case AArch64::fixup_a64_ldst64_tprel_lo12_nc:
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Type = ELF::R_AARCH64_TLSLE_LDST64_TPREL_LO12_NC;
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break;
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// TLS general-dynamic block
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case AArch64::fixup_a64_tlsdesc_adr_page:
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Type = ELF::R_AARCH64_TLSDESC_ADR_PAGE;
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break;
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case AArch64::fixup_a64_tlsdesc_ld64_lo12_nc:
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Type = ELF::R_AARCH64_TLSDESC_LD64_LO12_NC;
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break;
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case AArch64::fixup_a64_tlsdesc_add_lo12_nc:
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Type = ELF::R_AARCH64_TLSDESC_ADD_LO12_NC;
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break;
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case AArch64::fixup_a64_tlsdesc_call:
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Type = ELF::R_AARCH64_TLSDESC_CALL;
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break;
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}
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}
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return Type;
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}
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MCObjectWriter *llvm::createAArch64ELFObjectWriter(raw_ostream &OS,
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uint8_t OSABI,
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bool IsLittleEndian) {
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MCELFObjectTargetWriter *MOTW = new AArch64ELFObjectWriter(OSABI, IsLittleEndian);
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return createELFObjectWriter(MOTW, OS, IsLittleEndian);
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}
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