mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-15 20:29:48 +00:00
224dbf4aec
I started trying to fix a small issue, but this code has seen a small fix too many. The old code was fairly convoluted. Some of the issues it had: * It failed to check if a symbol difference was in the some section when converting a relocation to pcrel. * It failed to check if the relocation was already pcrel. * The pcrel value computation was wrong in some cases (relocation-pc.s) * It was missing quiet a few cases where it should not convert symbol relocations to section relocations, leaving the backends to patch it up. * It would not propagate the fact that it had changed a relocation to pcrel, requiring a quiet nasty work around in ARM. * It was missing comments. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205076 91177308-0d34-0410-b5e6-96231b3b80d8
126 lines
3.8 KiB
C++
126 lines
3.8 KiB
C++
//===-- MipsBaseInfo.h - Top level definitions for MIPS MC ------*- C++ -*-===//
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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 contains small standalone helper functions and enum definitions for
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// the Mips target useful for the compiler back-end and the MC libraries.
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//
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//===----------------------------------------------------------------------===//
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#ifndef MIPSBASEINFO_H
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#define MIPSBASEINFO_H
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#include "MipsFixupKinds.h"
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#include "MipsMCTargetDesc.h"
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#include "llvm/MC/MCExpr.h"
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#include "llvm/Support/DataTypes.h"
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#include "llvm/Support/ErrorHandling.h"
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namespace llvm {
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/// MipsII - This namespace holds all of the target specific flags that
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/// instruction info tracks.
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///
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namespace MipsII {
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/// Target Operand Flag enum.
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enum TOF {
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//===------------------------------------------------------------------===//
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// Mips Specific MachineOperand flags.
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MO_NO_FLAG,
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/// MO_GOT16 - Represents the offset into the global offset table at which
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/// the address the relocation entry symbol resides during execution.
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MO_GOT16,
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MO_GOT,
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/// MO_GOT_CALL - Represents the offset into the global offset table at
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/// which the address of a call site relocation entry symbol resides
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/// during execution. This is different from the above since this flag
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/// can only be present in call instructions.
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MO_GOT_CALL,
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/// MO_GPREL - Represents the offset from the current gp value to be used
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/// for the relocatable object file being produced.
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MO_GPREL,
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/// MO_ABS_HI/LO - Represents the hi or low part of an absolute symbol
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/// address.
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MO_ABS_HI,
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MO_ABS_LO,
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/// MO_TLSGD - Represents the offset into the global offset table at which
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// the module ID and TSL block offset reside during execution (General
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// Dynamic TLS).
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MO_TLSGD,
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/// MO_TLSLDM - Represents the offset into the global offset table at which
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// the module ID and TSL block offset reside during execution (Local
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// Dynamic TLS).
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MO_TLSLDM,
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MO_DTPREL_HI,
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MO_DTPREL_LO,
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/// MO_GOTTPREL - Represents the offset from the thread pointer (Initial
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// Exec TLS).
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MO_GOTTPREL,
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/// MO_TPREL_HI/LO - Represents the hi and low part of the offset from
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// the thread pointer (Local Exec TLS).
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MO_TPREL_HI,
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MO_TPREL_LO,
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// N32/64 Flags.
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MO_GPOFF_HI,
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MO_GPOFF_LO,
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MO_GOT_DISP,
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MO_GOT_PAGE,
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MO_GOT_OFST,
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/// MO_HIGHER/HIGHEST - Represents the highest or higher half word of a
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/// 64-bit symbol address.
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MO_HIGHER,
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MO_HIGHEST,
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/// MO_GOT_HI16/LO16, MO_CALL_HI16/LO16 - Relocations used for large GOTs.
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MO_GOT_HI16,
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MO_GOT_LO16,
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MO_CALL_HI16,
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MO_CALL_LO16
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};
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enum {
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//===------------------------------------------------------------------===//
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// Instruction encodings. These are the standard/most common forms for
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// Mips instructions.
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//
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// Pseudo - This represents an instruction that is a pseudo instruction
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// or one that has not been implemented yet. It is illegal to code generate
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// it, but tolerated for intermediate implementation stages.
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Pseudo = 0,
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/// FrmR - This form is for instructions of the format R.
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FrmR = 1,
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/// FrmI - This form is for instructions of the format I.
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FrmI = 2,
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/// FrmJ - This form is for instructions of the format J.
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FrmJ = 3,
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/// FrmFR - This form is for instructions of the format FR.
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FrmFR = 4,
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/// FrmFI - This form is for instructions of the format FI.
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FrmFI = 5,
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/// FrmOther - This form is for instructions that have no specific format.
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FrmOther = 6,
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FormMask = 15
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};
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}
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}
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#endif
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