================
@@ -139,6 +141,168 @@ using CanQualType = CanQual<Type>;
#define TYPE(Class, Base) class Class##Type;
#include "clang/AST/TypeNodes.inc"
+/// Pointer-authentication qualifiers.
+class PointerAuthQualifier {
+ enum : uint32_t {
+ EnabledShift = 0,
+ EnabledBits = 1,
+ EnabledMask = 1 << EnabledShift,
+ AddressDiscriminatedShift = EnabledShift + EnabledBits,
+ AddressDiscriminatedBits = 1,
+ AddressDiscriminatedMask = 1 << AddressDiscriminatedShift,
+ AuthenticationModeShift =
+ AddressDiscriminatedShift + AddressDiscriminatedBits,
+ AuthenticationModeBits = 2,
+ AuthenticationModeMask = ((1 << AuthenticationModeBits) - 1)
+ << AuthenticationModeShift,
+ IsaPointerShift = AuthenticationModeShift + AuthenticationModeBits,
+ IsaPointerBits = 1,
+ IsaPointerMask = ((1 << IsaPointerBits) - 1) << IsaPointerShift,
+ AuthenticatesNullValuesShift = IsaPointerShift + IsaPointerBits,
+ AuthenticatesNullValuesBits = 1,
+ AuthenticatesNullValuesMask = ((1 << AuthenticatesNullValuesBits) - 1)
+ << AuthenticatesNullValuesShift,
+ KeyShift = AuthenticatesNullValuesShift + AuthenticatesNullValuesBits,
+ KeyBits = 10,
+ KeyMask = ((1 << KeyBits) - 1) << KeyShift,
+ DiscriminatorShift = KeyShift + KeyBits,
+ DiscriminatorBits = 16,
+ DiscriminatorMask = ((1u << DiscriminatorBits) - 1) << DiscriminatorShift,
+ };
+
+ // bits: |0 |1 |2..3 |4 |
+ // |Enabled|Address|AuthenticationMode|ISA pointer|
+ // bits: |5 |6..15| 16...31 |
+ // |AuthenticatesNull|Key |Discriminator|
+ uint32_t Data;
+
+ // The following static assertions check that each of the 32 bits is present
+ // exactly in one of the constants.
+ static_assert((EnabledBits + AddressDiscriminatedBits +
+ AuthenticationModeBits + IsaPointerBits +
+ AuthenticatesNullValuesBits + KeyBits + DiscriminatorBits) ==
+ 32,
+ "PointerAuthQualifier should be exactly 32 bits");
+ static_assert((EnabledMask + AddressDiscriminatedMask +
+ AuthenticationModeMask + IsaPointerMask +
+ AuthenticatesNullValuesMask + KeyMask + DiscriminatorMask) ==
+ 0xFFFFFFFF,
+ "All masks should cover the entire bits");
+ static_assert((EnabledMask ^ AddressDiscriminatedMask ^
+ AuthenticationModeMask ^ IsaPointerMask ^
+ AuthenticatesNullValuesMask ^ KeyMask ^ DiscriminatorMask) ==
+ 0xFFFFFFFF,
+ "All masks should cover the entire bits");
+
+ PointerAuthQualifier(unsigned Key, bool IsAddressDiscriminated,
+ unsigned ExtraDiscriminator,
+ PointerAuthenticationMode AuthenticationMode,
+ bool IsIsaPointer, bool AuthenticatesNullValues)
+ : Data(EnabledMask |
+ (IsAddressDiscriminated
+ ? llvm::to_underlying(AddressDiscriminatedMask)
+ : 0) |
+ (Key << KeyShift) |
+ (llvm::to_underlying(AuthenticationMode)
+ << AuthenticationModeShift) |
+ (ExtraDiscriminator << DiscriminatorShift) |
+ (IsIsaPointer << IsaPointerShift) |
+ (AuthenticatesNullValues << AuthenticatesNullValuesShift)) {
+ assert(Key <= KeyNoneInternal);
+ assert(ExtraDiscriminator <= MaxDiscriminator);
+ }
+
+public:
+ enum {
+ KeyNoneInternal = (1u << KeyBits) - 1,
+
+ /// The maximum supported pointer-authentication key.
+ MaxKey = KeyNoneInternal - 1,
+
+ /// The maximum supported pointer-authentication discriminator.
+ MaxDiscriminator = (1u << DiscriminatorBits) - 1
+ };
+
+public:
+ PointerAuthQualifier() : Data(0) {}
----------------
kovdan01 wrote:
Changed to `PointerAuthQualifier() = default;` - we have a user-defined
non-default constructor, so, without explicit notice, the default one is
deleted (see https://en.cppreference.com/w/cpp/language/default_constructor).
See cfb3afe19c698aaf41fb7b492503081989896434
https://github.com/llvm/llvm-project/pull/84384
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