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Commit Graph

19 Commits

Author SHA1 Message Date
Andrei Vlad LUTAS
767bf2e5c0 Added support for new Intel AVX 10.2 instructions.
Added support for AMD RMPREAD instruction.
Improved EVEX decoding, including the new U bit.
Fixed ENTER & LEAVE operands.
2024-09-16 12:23:54 +03:00
Andrei Vlad LUTAS
fad9c7e35c BDDISASM v2.1.0 release - please consult the CHANGELOG for details about the modifications. 2024-02-20 13:39:22 +02:00
BITDEFENDER\vlutas
ee6cdd6cb6 Switched to a more parsing-friendly format for the instructions database, where individual components are sepparated by a semicolon. 2023-02-09 10:54:45 +02:00
BITDEFENDER\vlutas
24665b0531 Switched from nil to n/a naming for absent operands, as it is more obvious. 2023-02-08 17:44:45 +02:00
BITDEFENDER\vlutas
fc6059109d Improved comments & improved vector length specifiers. 2023-02-04 12:02:05 +02:00
BITDEFENDER\vlutas
9ba1e6a2f9 Added support for new Intel instructions, per Intel ISA extensions document #319433-046 (September 2022): PREFETCHITI, RAO-INT, CMPCCXADD, WRMSRNS, MSRLIST, AMX-FP16, AVX-IFMA, AVX-NE-CONVERT, AVX-VNNI-INT8.
Multiple minor fixes to existing instructions.
Moved x86 decoding tests in a separate directory & improved the test script.
2022-10-04 12:22:59 +03:00
Andrei Vlad LUTAS
08096172cc Multiple improvements
- New shemu flag - SHEMU_FLAG_SIDT, set when sheu encounters a SIDT in ring0.
- Added the CET Tracked flag to SYSCLAL, SYSENTER and INT n instructions.
- Fixed Do Not Track prefix recognition for CALL and JMP in long-mode.
- Fixed MONITOR and MONITORX implicit operands - the rAX register encodes a virtual address that will be used as the monitored range. That address is subject to a 1 byte load.
- Fixed RMPADJUST and RMPUPDATE implicit operands - the rAX register encodes a virtual address, and the rCX register encodes a virtual address of the RMP updated entry.
2021-08-31 13:37:50 +03:00
Andrei Vlad LUTAS
76d92e73c2 Multiple changes
- Add support for AVX512-FP16 instructions, as per https://software.intel.com/content/www/us/en/develop/download/intel-avx512-fp16-architecture-specification.html
- Bug fix: zeroing with no masking is not supported, so return an error if we encounter such encodings
- Bug fix: ignore VEX/EVEX.W field outside 64 bit mode for some instructions
- Several other minor fixes and improvements
2021-07-08 12:40:39 +03:00
Andrei Vlad LUTAS
fccf11915d Added support for Intel FRED and LKGS instructions. 2021-03-15 14:05:44 +02:00
Andrei Vlad LUTAS
7a0fa449bc Disassemble 4X90 as NOP as long as Rex.B is 0. Disassemble as XCHG only if Rex.B bit is set (promoting the use of R8 register). 2020-10-09 14:55:39 +03:00
Andrei Vlad LUTAS
9652450125 Added support for UINTR, HRESET and AVX-VNNI instructions, as per Intel® Architecture Instruction Set Extensions Programming Reference 41 (October 2020). 2020-10-05 13:19:03 +03:00
Andrei Vlad LUTAS
4f8b030ddd Added support for Intel Key Locker instructions, as per https://software.intel.com/content/www/us/en/develop/download/intel-key-locker-specification.html. 2020-09-16 11:56:05 +03:00
Andrei Vlad LUTAS
33078e4670 Added support for TDX instructions, per https://software.intel.com/content/dam/develop/external/us/en/documents/intel-tdx-cpu-architectural-specification.pdf. 2020-09-10 11:06:20 +03:00
Andrei Vlad LUTAS
ed564dba32 Specifically flag multi-byte NOP operands as not-accessed.
New capability - bddisasm can now be instructed whether to decode some instructions as NOPs are as MPX/CET/CLDEMOTE. This is the case for instructions that are mapped onto the wide NOP space: in that case, an encoding might be NOP if the feature is off, but might be something else (even #UD) if the feature is on.
Added NdDecodeWithContext API - this becomes the base decode API; it received the input information filled in a ND_CONTEXT structure, whih has to be initialized only once, and can be reused across calls. The NdInitContext function must be used to initialize the context, as it ensures backwards compatibility by filling new options with default values.
Improvements to the README file.
2020-07-30 11:07:14 +03:00
Andrei Vlad LUTAS
4b2f2aee66 Added dedicated Prefetch operand access type.
Internally, store the access type sepparately than the flags.
Dump conditional operand accesses with exi option too.
2020-07-25 17:16:35 +03:00
Andrei Vlad LUTAS
752bc626c4 Fixed RET with immediate - the immediate is not sign-extended.
Fixed VEX decoding in 32 bit mode - vex.vvvv bit 3 is simply ignored.
Fixed several FMA instructions decoding (L/W flag should be ignored).
Print the 64 bit immediate value in disassembly, instead of the raw immediate (note that the operand always contains the sign-extended, full immediate).
XBEGIN always uses 32/64 bit RIP size (0x66 does not affect its size).
Decode WBINVD even if it's preceded by 0x66/0xF2 prefixes.
Several mnemonic fixes (FXSAVE64, FXRSTOR64, PUSHA/PUSHAD...).
Properly decode VPERMIL2* instructions.
Fixed SSE register decoding when it is encoded in immediate.
Decode SCATTER instructions even though they use the VSIB index as source.
Some disp8 fixes (t1s -> t1s8/t1s16).
SYSCALL/SYSRET are decoded and executed in 32 bit compat modem, even though SDM states they are invalid.
RDPID uses 32/64 bit reg size, never 16.
Various other minor tweaks & fixes.
Re-generated the test files, and added some more, new tests.
2020-07-23 14:08:01 +03:00
Andrei Vlad LUTAS
9ff2543660 Added the Shadow Stack Pointer operand to the SYSCALL and SYSEXIT instructions.
Moved the CET test cases in dedicated folders.
Improved shadow-stack operand reporting - a distinction can be made between push/pop shadow stack accesses, and other shadow stack accesses.
A new field is now present in the memory information - the shadow stack access type, which indicates: explicit access, implicit via SSP, implicit push/pop via SSP or implicit via IA32_PL0_SSP.
2020-07-21 22:29:59 +03:00
Andrei Vlad LUTAS
811c3d0f7c Fixed several issues with CET instructions specification - shadow stack and shadow stack pointer implicit operands were missing from SETSSBSY instruction, and flags access was missing from them. 2020-07-21 17:36:19 +03:00
Andrei Vlad LUTAS
698ba367a1 Initial commit. 2020-07-21 11:19:18 +03:00