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Commit Graph

19 Commits

Author SHA1 Message Date
Andrei Vlad LUTAS
58197cc518 Removed support for PCOMMIT and CL1INVMB (not implemented by any x86/x64 CPUs), and marked MOV to/from test registers as being invalid in long mode.
Fixed https://github.com/bitdefender/bddisasm/issues/24
Fixed https://github.com/bitdefender/bddisasm/issues/25
Fixed https://github.com/bitdefender/bddisasm/issues/26
2020-11-09 09:18:46 +02:00
Andrei Vlad LUTAS
bcf9a89d69 Fixed https://github.com/bitdefender/bddisasm/issues/22 and https://github.com/bitdefender/bddisasm/issues/23. 2020-11-08 11:02:46 +02:00
Andrei Vlad LUTAS
2b2dbe2aea D64 flag for ENTER instruction. 2020-11-07 12:12:28 +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
d61a6fa5dd * INC/DEC do not modify the CF.
* Fixed FXSAVE64, PUSHAD and POPAD emulation - when explicit mnemonics were added for them, emulation support was not added, thus causing emulation to stop when encountering one of these.
2020-08-19 19:14:22 +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
d622f56211 Added SERIAL flag to the SERIALIZE instruction.
CLWB memory operand is subject to load access checks, while CLDEMOTE does not access memory at all (similar to PREFETCH).
2020-07-25 20:32:06 +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
52ed638c13 Fixed some typos.
Added SECURITY.md file.
2020-07-22 21:47:25 +03:00
Andrei Vlad LUTAS
94d7894fa5 Added the Shadow Stack Pointer operand to the SYSRET and SYSENTER instructions.
Regenrated CET test files, as the CPUID feature flag was split as per the last documentation into CET_SS and CET_IBT.
2020-07-22 09:15:29 +03:00
Andrei Vlad LUTAS
8392c97f97 Use the documented byte granularity for cache-line accesses.
Fixed CET CPUID feature flag - split into CET_SS and CET_IBT.
2020-07-22 00:47:46 +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
efe359b506 Typo fixes in the instruction tables.
Added a reference to the git repo in the documentation.
2020-07-21 16:38:09 +03:00
Andrei Vlad LUTAS
698ba367a1 Initial commit. 2020-07-21 11:19:18 +03:00