70f3c6e9e6
With dynamic linking we have the current limitation that there can be only a single active data segment (since we use __memory_base as the load address and we can't do arithmetic in constant expresions). This change delays the merging of active segments until a little later in the linking process which means that the grouping of data by section, and the magic __start/__end symbols work as expected under dynamic linking. Differential Revision: https://reviews.llvm.org/D96453
55 lines
1.4 KiB
C++
55 lines
1.4 KiB
C++
//===- OutputSegment.h ------------------------------------------*- 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 LLD_WASM_OUTPUT_SEGMENT_H
|
|
#define LLD_WASM_OUTPUT_SEGMENT_H
|
|
|
|
#include "InputChunks.h"
|
|
#include "lld/Common/ErrorHandler.h"
|
|
#include "llvm/Object/Wasm.h"
|
|
|
|
namespace lld {
|
|
namespace wasm {
|
|
|
|
class InputSegment;
|
|
|
|
class OutputSegment {
|
|
public:
|
|
OutputSegment(StringRef n) : name(n) {}
|
|
|
|
void addInputSegment(InputSegment *inSeg, uint32_t forceAlignment = 0) {
|
|
uint32_t segAlign = std::max(forceAlignment, inSeg->getAlignment());
|
|
alignment = std::max(alignment, segAlign);
|
|
inputSegments.push_back(inSeg);
|
|
size = llvm::alignTo(size, 1ULL << segAlign);
|
|
inSeg->outputSeg = this;
|
|
inSeg->outputSegmentOffset = size;
|
|
size += inSeg->getSize();
|
|
}
|
|
|
|
StringRef name;
|
|
bool isBss = false;
|
|
uint32_t index = 0;
|
|
uint32_t initFlags = 0;
|
|
uint32_t sectionOffset = 0;
|
|
uint32_t alignment = 0;
|
|
uint64_t startVA = 0;
|
|
std::vector<InputSegment *> inputSegments;
|
|
|
|
// Sum of the size of the all the input segments
|
|
uint32_t size = 0;
|
|
|
|
// Segment header
|
|
std::string header;
|
|
};
|
|
|
|
} // namespace wasm
|
|
} // namespace lld
|
|
|
|
#endif // LLD_WASM_OUTPUT_SEGMENT_H
|