llvm/bolt/lib/Passes/FixRelaxationPass.cpp

//===- bolt/Passes/FixRelaxationPass.cpp ------------------------*- 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
//
//===----------------------------------------------------------------------===//

#include "bolt/Passes/FixRelaxationPass.h"
#include "bolt/Core/ParallelUtilities.h"

usingnamespacellvm;

namespace llvm {
namespace bolt {

// This function finds ADRP+ADD instruction sequences that originally before
// linker relaxations were ADRP+LDR. We've modified LDR/ADD relocation properly
// during relocation reading, so its targeting right symbol. As for ADRP its
// target is wrong before this pass since we won't be able to recognize and
// properly change R_AARCH64_ADR_GOT_PAGE relocation to
// R_AARCH64_ADR_PREL_PG_HI21 during relocation reading. Now we're searching for
// ADRP+ADD sequences, checking that ADRP points to the GOT-table symbol and the
// target of ADD is another symbol. When found change ADRP symbol reference to
// the ADDs one.
void FixRelaxations::runOnFunction(BinaryFunction &BF) { … }

Error FixRelaxations::runOnFunctions(BinaryContext &BC) { … }

} // namespace bolt
} // namespace llvm