diff options
Diffstat (limited to 'lib/Target/X86/MCTargetDesc/X86ELFRelocationInfo.cpp')
-rw-r--r-- | lib/Target/X86/MCTargetDesc/X86ELFRelocationInfo.cpp | 141 |
1 files changed, 0 insertions, 141 deletions
diff --git a/lib/Target/X86/MCTargetDesc/X86ELFRelocationInfo.cpp b/lib/Target/X86/MCTargetDesc/X86ELFRelocationInfo.cpp deleted file mode 100644 index ddb764facdbfa..0000000000000 --- a/lib/Target/X86/MCTargetDesc/X86ELFRelocationInfo.cpp +++ /dev/null @@ -1,141 +0,0 @@ -//===-- X86ELFRelocationInfo.cpp ----------------------------------------===// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// - -#include "MCTargetDesc/X86MCTargetDesc.h" -#include "llvm/MC/MCContext.h" -#include "llvm/MC/MCExpr.h" -#include "llvm/MC/MCInst.h" -#include "llvm/MC/MCRelocationInfo.h" -#include "llvm/MC/MCSymbol.h" -#include "llvm/Object/ELFObjectFile.h" -#include "llvm/Support/ELF.h" - -using namespace llvm; -using namespace object; -using namespace ELF; - -namespace { -class X86_64ELFRelocationInfo : public MCRelocationInfo { -public: - X86_64ELFRelocationInfo(MCContext &Ctx) : MCRelocationInfo(Ctx) {} - - const MCExpr *createExprForRelocation(RelocationRef Rel) override { - uint64_t RelType = Rel.getType(); - elf_symbol_iterator SymI = Rel.getSymbol(); - - ErrorOr<StringRef> SymNameOrErr = SymI->getName(); - if (std::error_code EC = SymNameOrErr.getError()) - report_fatal_error(EC.message()); - StringRef SymName = *SymNameOrErr; - - ErrorOr<uint64_t> SymAddr = SymI->getAddress(); - if (std::error_code EC = SymAddr.getError()) - report_fatal_error(EC.message()); - uint64_t SymSize = SymI->getSize(); - int64_t Addend = *ELFRelocationRef(Rel).getAddend(); - - MCSymbol *Sym = Ctx.getOrCreateSymbol(SymName); - // FIXME: check that the value is actually the same. - if (!Sym->isVariable()) - Sym->setVariableValue(MCConstantExpr::create(*SymAddr, Ctx)); - - const MCExpr *Expr = nullptr; - // If hasAddend is true, then we need to add Addend (r_addend) to Expr. - bool hasAddend = false; - - // The AMD64 SysV ABI says: - // A: the addend used to compute the value of the relocatable field. - // B: the base address at which a shared object has been loaded into memory - // during execution. Generally, a shared object is built with a 0 base - // virtual address, but the execution address will be different. - // G: the offset into the global offset table at which the relocation - // entry's symbol will reside during execution. - // GOT: the address of the global offset table. - // L: the place (section offset or address) of the Procedure Linkage Table - // entry for a symbol. - // P: the place (section offset or address) of the storage unit being - // relocated (computed using r_offset). - // S: the value of the symbol whose index resides in the relocation entry. - // Z: the size of the symbol whose index resides in the relocation entry. - - switch(RelType) { - case R_X86_64_NONE: - case R_X86_64_COPY: - // none - break; - case R_X86_64_64: - case R_X86_64_16: - case R_X86_64_8: - // S + A - case R_X86_64_32: - case R_X86_64_32S: - // S + A (We don't care about the result not fitting in 32 bits.) - case R_X86_64_PC32: - case R_X86_64_PC16: - case R_X86_64_PC8: - case R_X86_64_PC64: - // S + A - P (P/pcrel is implicit) - hasAddend = true; - Expr = MCSymbolRefExpr::create(Sym, Ctx); - break; - case R_X86_64_GOT32: - case R_X86_64_GOT64: - case R_X86_64_GOTPC32: - case R_X86_64_GOTPC64: - case R_X86_64_GOTPLT64: - // G + A - hasAddend = true; - Expr = MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_GOT, Ctx); - break; - case R_X86_64_PLT32: - // L + A - P -> S@PLT + A - hasAddend = true; - Expr = MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_PLT, Ctx); - break; - case R_X86_64_GLOB_DAT: - case R_X86_64_JUMP_SLOT: - // S - Expr = MCSymbolRefExpr::create(Sym, Ctx); - break; - case R_X86_64_GOTPCREL: - case R_X86_64_GOTPCREL64: - // G + GOT + A - P -> S@GOTPCREL + A - hasAddend = true; - Expr = MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_GOTPCREL, Ctx); - break; - case R_X86_64_GOTOFF64: - // S + A - GOT - Expr = MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_GOTOFF, Ctx); - break; - case R_X86_64_PLTOFF64: - // L + A - GOT - break; - case R_X86_64_SIZE32: - case R_X86_64_SIZE64: - // Z + A - Expr = MCConstantExpr::create(SymSize, Ctx); - break; - default: - Expr = MCSymbolRefExpr::create(Sym, Ctx); - break; - } - if (Expr && hasAddend && Addend != 0) - Expr = MCBinaryExpr::createAdd(Expr, - MCConstantExpr::create(Addend, Ctx), - Ctx); - return Expr; - } -}; -} // End unnamed namespace - -/// createX86ELFRelocationInfo - Construct an X86 Mach-O RelocationInfo. -MCRelocationInfo *llvm::createX86_64ELFRelocationInfo(MCContext &Ctx) { - // We only handle x86-64 for now. - return new X86_64ELFRelocationInfo(Ctx); -} |