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
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
|
// SPDX-License-Identifier: GPL-3.0-or-later
#ifndef RCC_MC_MCSTREAMER_H
#define RCC_MC_MCSTREAMER_H
#include "rcc/MC/MCCFI.h"
#include "rcc/MC/MCInst.h"
#include "rcc/MC/MCInstPrinter.h"
#include "rcc/MC/MCSection.h"
#include "rcc/MC/MCSymbol.h"
#include "rcc/Support/Error.h"
#include <cstdint>
#include <span>
#include <string>
#include <string_view>
#include <unordered_set>
namespace rcc::mc {
enum class MCSymbolAttribute : std::uint8_t {
Global,
Weak,
Local,
Hidden,
Protected,
Function,
Object,
TLSObject,
};
class MCStreamer {
public:
virtual ~MCStreamer() = default;
[[nodiscard]] virtual Expected<void> switchSection(MCSectionRef Section) = 0;
[[nodiscard]] virtual Expected<void> emitLabel(MCSymbolRef Symbol) = 0;
[[nodiscard]] virtual Expected<void> emitInstruction(const MCInst &Instruction) = 0;
[[nodiscard]] virtual Expected<void> emitValue(MCExprRef Value, std::uint8_t Size) = 0;
[[nodiscard]] virtual Expected<void> emitBytes(std::span<const std::uint8_t> Bytes) = 0;
[[nodiscard]] virtual Expected<void> emitZeroFill(std::uint64_t Size) = 0;
[[nodiscard]] virtual Expected<void> emitAlignment(std::uint64_t Alignment, std::uint8_t Fill = 0,
std::uint64_t MaximumBytes = 0) = 0;
[[nodiscard]] virtual Expected<void> emitSymbolAttribute(MCSymbolRef Symbol,
MCSymbolAttribute Attribute) = 0;
[[nodiscard]] virtual Expected<void> emitSymbolSize(MCSymbolRef Symbol, MCExprRef Size) = 0;
[[nodiscard]] virtual Expected<void> emitCommonSymbol(MCSymbolRef Symbol, std::uint64_t Size,
std::uint64_t Alignment) = 0;
[[nodiscard]] virtual Expected<void> emitDirective(std::string_view Name,
std::string_view Arguments = {}) = 0;
[[nodiscard]] virtual Expected<void> emitCFI(const MCCFIInstruction &Instruction) = 0;
[[nodiscard]] virtual Expected<void> emitInlineAssembly(std::string_view Text) = 0;
[[nodiscard]] virtual Expected<void> emitComment(std::string_view Text) = 0;
[[nodiscard]] virtual Expected<void> finish() = 0;
};
class AsmTextStreamer final : public MCStreamer {
public:
explicit AsmTextStreamer(const MCInstPrinter &Printer) noexcept : Printer(&Printer) {}
[[nodiscard]] Expected<void> switchSection(MCSectionRef Section) override;
[[nodiscard]] Expected<void> emitLabel(MCSymbolRef Symbol) override;
[[nodiscard]] Expected<void> emitInstruction(const MCInst &Instruction) override;
[[nodiscard]] Expected<void> emitValue(MCExprRef Value, std::uint8_t Size) override;
[[nodiscard]] Expected<void> emitBytes(std::span<const std::uint8_t> Bytes) override;
[[nodiscard]] Expected<void> emitZeroFill(std::uint64_t Size) override;
[[nodiscard]] Expected<void> emitAlignment(std::uint64_t Alignment, std::uint8_t Fill = 0,
std::uint64_t MaximumBytes = 0) override;
[[nodiscard]] Expected<void> emitSymbolAttribute(MCSymbolRef Symbol,
MCSymbolAttribute Attribute) override;
[[nodiscard]] Expected<void> emitSymbolSize(MCSymbolRef Symbol, MCExprRef Size) override;
[[nodiscard]] Expected<void> emitCommonSymbol(MCSymbolRef Symbol, std::uint64_t Size,
std::uint64_t Alignment) override;
[[nodiscard]] Expected<void> emitDirective(std::string_view Name,
std::string_view Arguments = {}) override;
[[nodiscard]] Expected<void> emitCFI(const MCCFIInstruction &Instruction) override;
[[nodiscard]] Expected<void> emitInlineAssembly(std::string_view Text) override;
[[nodiscard]] Expected<void> emitComment(std::string_view Text) override;
[[nodiscard]] Expected<void> finish() override;
[[nodiscard]] Expected<std::string> takeOutput();
private:
[[nodiscard]] Expected<void> appendLine(std::string_view Prefix, std::string_view Text);
[[nodiscard]] Expected<void> requireActiveSection() const;
const MCInstPrinter *Printer;
MCSectionRef CurrentSection;
std::unordered_set<std::string> DefinedSymbols;
std::string Output;
bool IsFinished = false;
bool OutputWasTaken = false;
};
} // namespace rcc::mc
#endif // RCC_MC_MCSTREAMER_H
|
