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llvm-mirror/include/llvm/MC/MCFixupKindInfo.h
Hans Wennborg a145f0441b [MC][ARM] Resolve some pcrel fixups at assembly time (PR44929)
MC currently does not emit these relocation types, and lld does not
handle them. Add FKF_Constant as a work-around of some ARM code after
D72197. Eventually we probably should implement these relocation types.

By Fangrui Song!

Differential revision: https://reviews.llvm.org/D72892
2020-02-27 12:43:29 +01:00

51 lines
1.6 KiB
C++

//===-- llvm/MC/MCFixupKindInfo.h - Fixup Descriptors -----------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_MC_MCFIXUPKINDINFO_H
#define LLVM_MC_MCFIXUPKINDINFO_H
namespace llvm {
/// Target independent information on a fixup kind.
struct MCFixupKindInfo {
enum FixupKindFlags {
/// Is this fixup kind PCrelative? This is used by the assembler backend to
/// evaluate fixup values in a target independent manner when possible.
FKF_IsPCRel = (1 << 0),
/// Should this fixup kind force a 4-byte aligned effective PC value?
FKF_IsAlignedDownTo32Bits = (1 << 1),
/// Should this fixup be evaluated in a target dependent manner?
FKF_IsTarget = (1 << 2),
/// This fixup kind should be resolved if defined.
/// FIXME This is a workaround because we don't support certain ARM
/// relocation types. This flag should eventually be removed.
FKF_Constant = 1 << 3,
};
/// A target specific name for the fixup kind. The names will be unique for
/// distinct kinds on any given target.
const char *Name;
/// The bit offset to write the relocation into.
unsigned TargetOffset;
/// The number of bits written by this fixup. The bits are assumed to be
/// contiguous.
unsigned TargetSize;
/// Flags describing additional information on this fixup kind.
unsigned Flags;
};
} // End llvm namespace
#endif