blob: 64124b1ebc2ce348d1ad88b2d4ed88da2c7f8069 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
|
//===- InputSegment.h -------------------------------------------*- C++ -*-===//
//
// The LLVM Linker
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Represents a WebAssembly data segment which can be included as part of
// an output data segments. Note that in WebAssembly, unlike ELF and other
// formats, used the term "data segment" to refer to the continous regions of
// memory that make on the data section. See:
// https://webassembly.github.io/spec/syntax/modules.html#syntax-data
//
// For example, by default, clang will produce a separate data section for
// each global variable.
//
//===----------------------------------------------------------------------===//
#ifndef LLD_WASM_INPUT_SEGMENT_H
#define LLD_WASM_INPUT_SEGMENT_H
#include "lld/Common/ErrorHandler.h"
#include "llvm/Object/Wasm.h"
using llvm::object::WasmSegment;
using llvm::wasm::WasmRelocation;
namespace lld {
namespace wasm {
class ObjFile;
class OutputSegment;
class InputSegment {
public:
InputSegment(const WasmSegment *Seg, const ObjFile *F)
: Segment(Seg), File(F) {}
// Translate an offset in the input segment to an offset in the output
// segment.
uint32_t translateVA(uint32_t Address) const;
const OutputSegment *getOutputSegment() const { return OutputSeg; }
uint32_t getOutputSegmentOffset() const { return OutputSegmentOffset; }
uint32_t getInputSectionOffset() const { return Segment->SectionOffset; }
void setOutputSegment(const OutputSegment *Segment, uint32_t Offset) {
OutputSeg = Segment;
OutputSegmentOffset = Offset;
}
uint32_t getSize() const { return Segment->Data.Content.size(); }
uint32_t getAlignment() const { return Segment->Data.Alignment; }
uint32_t startVA() const { return Segment->Data.Offset.Value.Int32; }
uint32_t endVA() const { return startVA() + getSize(); }
StringRef getName() const { return Segment->Data.Name; }
const WasmSegment *Segment;
const ObjFile *File;
std::vector<WasmRelocation> Relocations;
protected:
const OutputSegment *OutputSeg = nullptr;
uint32_t OutputSegmentOffset = 0;
};
} // namespace wasm
} // namespace lld
#endif // LLD_WASM_INPUT_SEGMENT_H
|
