zyantific/zydis v2.0.0

v2.0.0 Final

on GitHub

This is the final release of Zydis 2.

Detailed changelog (since v2.0.0-beta1)

• Improved instruction decoding

  • Fixed decoding of XOP instructions
  • Fixed handling of illegal LOCK prefixes for XOP/VEX/EVEX/MVEX instructions
  • Significantly improved detection of bad register values
  • Added check for invalid GATHER registers
  • Fixed EVEX/MVEX.R' not beeing ignored in 16- and 32-bit mode

• Improved formatter

  • Omitting an operand by using formatter hooks will now correctly omit the semicolon as well
  • ZYDIS_FORMATTER_HOOK_PRE_OPERAND and ZYDIS_FORMATTER_HOOK_POST_OPERAND can now be used to omit a specific operand
  • Added ZydisFormatterFormatOperand and ZydisFormatterFormatOperandEx (this won't print AVX-512/KNC decorators)
  • User defined callbacks should return ZYDIS_STATUS_SKIP_OPERAND to omit an operand (returning ZYDIS_STATUS_SUCCESS without writing to the buffer is now deprecated)

• Added new instructions

  • PCONFIG
  • EXTRQ, INSERTQ, MOVNTSD, MOVNTSS (SSE4a)
  • MONITORX, MWAITX
  • ENCLV
  • VPOPCNTD/VPOPCNTQ instructions with 128- and 256-bit vector-length
  • Added missing VEX-encoded GFNI instructions

• Fixed some instruction definitions

  • Changed XSAVE/XSAVEOPT memory operand from W to RW
  • Changed amount of bytes popped from stack by the IRET instruction
  • Fixed LWPINS and LWPVAL instructions
  • Fixed exception-class of some GFNI instructions
  • Fixed RDRAND and RDSEED instructions
  • Fixed SYSRET instruction
  • Fixed XCHG R8, RAX falsely beeing decoded as NOP
  • Fixed operand size of some conditional jump instructions
  • Changed destination operand action of PEXT, PDEP and ANDN from read/write to write-only

• Misc bugfixes

  • Fixed formatting of memory operands with explicit segment register
  • Fixed a bug in ZydisRegisterGetClass that caused the function to report invalid register-classes for IP and FLAGS registers
  • Changed type of implicit memory operands to ZYDIS_MEMOP_TYPE_MEM instead of ZYDIS_MEMOP_TYPE_INVALID