diff options
Diffstat (limited to 'gnu/llvm/lib/Target/AArch64/Disassembler/AArch64ExternalSymbolizer.cpp')
| -rw-r--r-- | gnu/llvm/lib/Target/AArch64/Disassembler/AArch64ExternalSymbolizer.cpp | 224 |
1 files changed, 0 insertions, 224 deletions
diff --git a/gnu/llvm/lib/Target/AArch64/Disassembler/AArch64ExternalSymbolizer.cpp b/gnu/llvm/lib/Target/AArch64/Disassembler/AArch64ExternalSymbolizer.cpp deleted file mode 100644 index 342655a29b1..00000000000 --- a/gnu/llvm/lib/Target/AArch64/Disassembler/AArch64ExternalSymbolizer.cpp +++ /dev/null @@ -1,224 +0,0 @@ -//===- AArch64ExternalSymbolizer.cpp - Symbolizer for AArch64 ---*- C++ -*-===// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// - -#include "AArch64ExternalSymbolizer.h" -#include "MCTargetDesc/AArch64AddressingModes.h" -#include "Utils/AArch64BaseInfo.h" -#include "llvm/MC/MCContext.h" -#include "llvm/MC/MCExpr.h" -#include "llvm/MC/MCInst.h" -#include "llvm/MC/MCRegisterInfo.h" -#include "llvm/Support/Format.h" -#include "llvm/Support/raw_ostream.h" - -using namespace llvm; - -#define DEBUG_TYPE "aarch64-disassembler" - -static MCSymbolRefExpr::VariantKind -getVariant(uint64_t LLVMDisassembler_VariantKind) { - switch (LLVMDisassembler_VariantKind) { - case LLVMDisassembler_VariantKind_None: - return MCSymbolRefExpr::VK_None; - case LLVMDisassembler_VariantKind_ARM64_PAGE: - return MCSymbolRefExpr::VK_PAGE; - case LLVMDisassembler_VariantKind_ARM64_PAGEOFF: - return MCSymbolRefExpr::VK_PAGEOFF; - case LLVMDisassembler_VariantKind_ARM64_GOTPAGE: - return MCSymbolRefExpr::VK_GOTPAGE; - case LLVMDisassembler_VariantKind_ARM64_GOTPAGEOFF: - return MCSymbolRefExpr::VK_GOTPAGEOFF; - case LLVMDisassembler_VariantKind_ARM64_TLVP: - case LLVMDisassembler_VariantKind_ARM64_TLVOFF: - default: - llvm_unreachable("bad LLVMDisassembler_VariantKind"); - } -} - -/// tryAddingSymbolicOperand - tryAddingSymbolicOperand trys to add a symbolic -/// operand in place of the immediate Value in the MCInst. The immediate -/// Value has not had any PC adjustment made by the caller. If the instruction -/// is a branch that adds the PC to the immediate Value then isBranch is -/// Success, else Fail. If GetOpInfo is non-null, then it is called to get any -/// symbolic information at the Address for this instrution. If that returns -/// non-zero then the symbolic information it returns is used to create an -/// MCExpr and that is added as an operand to the MCInst. If GetOpInfo() -/// returns zero and isBranch is Success then a symbol look up for -/// Address + Value is done and if a symbol is found an MCExpr is created with -/// that, else an MCExpr with Address + Value is created. If GetOpInfo() -/// returns zero and isBranch is Fail then the Opcode of the MCInst is -/// tested and for ADRP an other instructions that help to load of pointers -/// a symbol look up is done to see it is returns a specific reference type -/// to add to the comment stream. This function returns Success if it adds -/// an operand to the MCInst and Fail otherwise. -bool AArch64ExternalSymbolizer::tryAddingSymbolicOperand( - MCInst &MI, raw_ostream &CommentStream, int64_t Value, uint64_t Address, - bool IsBranch, uint64_t Offset, uint64_t InstSize) { - if (!SymbolLookUp) - return false; - // FIXME: This method shares a lot of code with - // MCExternalSymbolizer::tryAddingSymbolicOperand. It may be possible - // refactor the MCExternalSymbolizer interface to allow more of this - // implementation to be shared. - // - struct LLVMOpInfo1 SymbolicOp; - memset(&SymbolicOp, '\0', sizeof(struct LLVMOpInfo1)); - SymbolicOp.Value = Value; - uint64_t ReferenceType; - const char *ReferenceName; - if (!GetOpInfo || - !GetOpInfo(DisInfo, Address, 0 /* Offset */, InstSize, 1, &SymbolicOp)) { - if (IsBranch) { - ReferenceType = LLVMDisassembler_ReferenceType_In_Branch; - const char *Name = SymbolLookUp(DisInfo, Address + Value, &ReferenceType, - Address, &ReferenceName); - if (Name) { - SymbolicOp.AddSymbol.Name = Name; - SymbolicOp.AddSymbol.Present = true; - SymbolicOp.Value = 0; - } else { - SymbolicOp.Value = Address + Value; - } - if (ReferenceType == LLVMDisassembler_ReferenceType_Out_SymbolStub) - CommentStream << "symbol stub for: " << ReferenceName; - else if (ReferenceType == - LLVMDisassembler_ReferenceType_Out_Objc_Message) - CommentStream << "Objc message: " << ReferenceName; - } else if (MI.getOpcode() == AArch64::ADRP) { - ReferenceType = LLVMDisassembler_ReferenceType_In_ARM64_ADRP; - // otool expects the fully encoded ADRP instruction to be passed in as - // the value here, so reconstruct it: - const MCRegisterInfo &MCRI = *Ctx.getRegisterInfo(); - uint32_t EncodedInst = 0x90000000; - EncodedInst |= (Value & 0x3) << 29; // immlo - EncodedInst |= ((Value >> 2) & 0x7FFFF) << 5; // immhi - EncodedInst |= MCRI.getEncodingValue(MI.getOperand(0).getReg()); // reg - SymbolLookUp(DisInfo, EncodedInst, &ReferenceType, Address, - &ReferenceName); - CommentStream << format("0x%llx", (0xfffffffffffff000LL & Address) + - Value * 0x1000); - } else if (MI.getOpcode() == AArch64::ADDXri || - MI.getOpcode() == AArch64::LDRXui || - MI.getOpcode() == AArch64::LDRXl || - MI.getOpcode() == AArch64::ADR) { - if (MI.getOpcode() == AArch64::ADDXri) - ReferenceType = LLVMDisassembler_ReferenceType_In_ARM64_ADDXri; - else if (MI.getOpcode() == AArch64::LDRXui) - ReferenceType = LLVMDisassembler_ReferenceType_In_ARM64_LDRXui; - if (MI.getOpcode() == AArch64::LDRXl) { - ReferenceType = LLVMDisassembler_ReferenceType_In_ARM64_LDRXl; - SymbolLookUp(DisInfo, Address + Value, &ReferenceType, Address, - &ReferenceName); - } else if (MI.getOpcode() == AArch64::ADR) { - ReferenceType = LLVMDisassembler_ReferenceType_In_ARM64_ADR; - SymbolLookUp(DisInfo, Address + Value, &ReferenceType, Address, - &ReferenceName); - } else { - const MCRegisterInfo &MCRI = *Ctx.getRegisterInfo(); - // otool expects the fully encoded ADD/LDR instruction to be passed in - // as the value here, so reconstruct it: - unsigned EncodedInst = - MI.getOpcode() == AArch64::ADDXri ? 0x91000000: 0xF9400000; - EncodedInst |= Value << 10; // imm12 [+ shift:2 for ADD] - EncodedInst |= - MCRI.getEncodingValue(MI.getOperand(1).getReg()) << 5; // Rn - EncodedInst |= MCRI.getEncodingValue(MI.getOperand(0).getReg()); // Rd - - SymbolLookUp(DisInfo, EncodedInst, &ReferenceType, Address, - &ReferenceName); - } - if (ReferenceType == LLVMDisassembler_ReferenceType_Out_LitPool_SymAddr) - CommentStream << "literal pool symbol address: " << ReferenceName; - else if (ReferenceType == - LLVMDisassembler_ReferenceType_Out_LitPool_CstrAddr) { - CommentStream << "literal pool for: \""; - CommentStream.write_escaped(ReferenceName); - CommentStream << "\""; - } else if (ReferenceType == - LLVMDisassembler_ReferenceType_Out_Objc_CFString_Ref) - CommentStream << "Objc cfstring ref: @\"" << ReferenceName << "\""; - else if (ReferenceType == - LLVMDisassembler_ReferenceType_Out_Objc_Message) - CommentStream << "Objc message: " << ReferenceName; - else if (ReferenceType == - LLVMDisassembler_ReferenceType_Out_Objc_Message_Ref) - CommentStream << "Objc message ref: " << ReferenceName; - else if (ReferenceType == - LLVMDisassembler_ReferenceType_Out_Objc_Selector_Ref) - CommentStream << "Objc selector ref: " << ReferenceName; - else if (ReferenceType == - LLVMDisassembler_ReferenceType_Out_Objc_Class_Ref) - CommentStream << "Objc class ref: " << ReferenceName; - // For these instructions, the SymbolLookUp() above is just to get the - // ReferenceType and ReferenceName. We want to make sure not to - // fall through so we don't build an MCExpr to leave the disassembly - // of the immediate values of these instructions to the InstPrinter. - return false; - } else { - return false; - } - } - - const MCExpr *Add = nullptr; - if (SymbolicOp.AddSymbol.Present) { - if (SymbolicOp.AddSymbol.Name) { - StringRef Name(SymbolicOp.AddSymbol.Name); - MCSymbol *Sym = Ctx.getOrCreateSymbol(Name); - MCSymbolRefExpr::VariantKind Variant = getVariant(SymbolicOp.VariantKind); - if (Variant != MCSymbolRefExpr::VK_None) - Add = MCSymbolRefExpr::create(Sym, Variant, Ctx); - else - Add = MCSymbolRefExpr::create(Sym, Ctx); - } else { - Add = MCConstantExpr::create(SymbolicOp.AddSymbol.Value, Ctx); - } - } - - const MCExpr *Sub = nullptr; - if (SymbolicOp.SubtractSymbol.Present) { - if (SymbolicOp.SubtractSymbol.Name) { - StringRef Name(SymbolicOp.SubtractSymbol.Name); - MCSymbol *Sym = Ctx.getOrCreateSymbol(Name); - Sub = MCSymbolRefExpr::create(Sym, Ctx); - } else { - Sub = MCConstantExpr::create(SymbolicOp.SubtractSymbol.Value, Ctx); - } - } - - const MCExpr *Off = nullptr; - if (SymbolicOp.Value != 0) - Off = MCConstantExpr::create(SymbolicOp.Value, Ctx); - - const MCExpr *Expr; - if (Sub) { - const MCExpr *LHS; - if (Add) - LHS = MCBinaryExpr::createSub(Add, Sub, Ctx); - else - LHS = MCUnaryExpr::createMinus(Sub, Ctx); - if (Off) - Expr = MCBinaryExpr::createAdd(LHS, Off, Ctx); - else - Expr = LHS; - } else if (Add) { - if (Off) - Expr = MCBinaryExpr::createAdd(Add, Off, Ctx); - else - Expr = Add; - } else { - if (Off) - Expr = Off; - else - Expr = MCConstantExpr::create(0, Ctx); - } - - MI.addOperand(MCOperand::createExpr(Expr)); - - return true; -} |