Seal capability seals a capability with a sealing capability, by setting the ObjectType of the capability to the Capability Value of the sealing capability, and writes the result to the destination Capability register.
| 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| 1 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | Cm | 0 | 0 | 0 | 0 | 1 | 0 | Cn | Cd | ||||||||||||
| opc | |||||||||||||||||||||||||||||||
integer d = UInt(Cd); integer n = UInt(Cn); integer m = UInt(Cm);
| <Cd> |
Is the capability name of the destination register, encoded in the "Cd" field. |
| <Cn> |
Is the capability name of the first source register, encoded in the "Cn" field. |
| <Cm> |
Is the capability name of the second source register, encoded in the "Cm" field. |
CheckCapabilitiesEnabled(); bits(64) otype = CapGetValue(C[m]); Capability c = CapSetObjectType(C[n], otype); if CapIsTagSet(C[n]) && CapIsTagSet(C[m]) && !CapIsSealed(C[n]) && !CapIsSealed(C[m]) && CapCheckPermissions(C[m], CAP_PERM_SEAL) && CapIsInBounds(C[m]) && UInt(otype) <= CAP_MAX_OBJECT_TYPE then C[d] = c; else C[d] = CapWithTagClear(c);
Internal version only: isa v32.13, AdvSIMD v29.04, pseudocode morello-2022-01_rc2, capabilities morello-2022-01_rc2 ; Build timestamp: 2022-01-11T11:23
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