Illegal instruction ud2

illegal instruction c++
clang ud2clang illegal instruction

Description. Generates an invalid opcode. This instruction is provided for software testing to explicitly generate an invalid opcode. The Go signal handler has printed a short dump of the instructions at the location that triggered the SIGILL and the first two bytes, 0xf 0xb , are a ud2 Raise invalid opcode exception. 0F 0B, UD2, ZO, Valid, Valid, Raise invalid opcode exception. 1. Some older processors decode the UD0 instruction