blob: aa66e0f7131c797fcc6f6e952de507559b7b0811 (
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
|
// SPDX-License-Identifier: GPL-3.0-or-later
#include "rcc/MC/MCCFI.h"
#include <cstddef>
namespace rcc::mc {
Expected<void> MCCFIInstruction::verify() const {
std::size_t ExpectedOperands = 0;
bool RequiresBytes = false;
bool RequiresSymbol = false;
switch (Operation) {
case MCCFIOperation::StartProc:
case MCCFIOperation::EndProc:
case MCCFIOperation::Sections:
case MCCFIOperation::SignalFrame:
case MCCFIOperation::RememberState:
case MCCFIOperation::RestoreState:
case MCCFIOperation::WindowSave:
case MCCFIOperation::NegateReturnAddressState:
case MCCFIOperation::NegateReturnAddressStateWithPC:
break;
case MCCFIOperation::Personality:
case MCCFIOperation::LSDA:
ExpectedOperands = 1;
RequiresSymbol = true;
break;
case MCCFIOperation::ReturnColumn:
case MCCFIOperation::SameValue:
case MCCFIOperation::DefCFARegister:
case MCCFIOperation::DefCFAOffset:
case MCCFIOperation::AdjustCFAOffset:
case MCCFIOperation::Restore:
case MCCFIOperation::Undefined:
case MCCFIOperation::GNUArgsSize:
ExpectedOperands = 1;
break;
case MCCFIOperation::Offset:
case MCCFIOperation::DefCFA:
case MCCFIOperation::RelativeOffset:
case MCCFIOperation::Register:
case MCCFIOperation::ValueOffset:
ExpectedOperands = 2;
break;
case MCCFIOperation::Escape:
RequiresBytes = true;
break;
case MCCFIOperation::Label:
RequiresSymbol = true;
break;
}
if (Operands.size() != ExpectedOperands)
return makeUnexpected(ErrorCode::InvalidArgument, "MC CFI event has an invalid operand count");
if (RequiresBytes != !Bytes.empty()) {
return makeUnexpected(ErrorCode::InvalidArgument,
RequiresBytes ? "MC CFI escape event requires bytes"
: "non-escape MC CFI event cannot contain bytes");
}
if (RequiresSymbol != static_cast<bool>(Symbol)) {
return makeUnexpected(ErrorCode::InvalidArgument, RequiresSymbol
? "MC CFI event requires a symbol"
: "MC CFI event cannot contain a symbol");
}
return {};
}
} // namespace rcc::mc
|
