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path: root/src/long_mode/mod.rs
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2023-01-02remove a few duplicate impls, add stubs for geneirc translationsiximeow
generate_opcode.py has quickly grown into generating much more than just opcode definitions, and now handles a few duplicate impls across the different decode modes as well. some of the added impl generation conflicts with still-existing hand-written impls from yore, so they needed a bit of removing. next will be the addition of a generic module for "probably what you want" disassembly of x86, avoiding the 64-/32-/16-bitness of the architecture family with an attempt to decode "probably what you wanted" from a byte sequence. it needs a little more work still, but TODO stubs added here support that new module.
2023-01-02yax builds again with opcodes generated by typeiximeow
2022-12-03fix incorrect rex selection and field description offsetsiximeow
2022-12-0366 prefixes are common, 0f opcodes are commoniximeow
2022-12-03support a fast path through the decoder for [rex-prefixed]opcode instsiximeow
the overwhelming majority of x86 instructions are either a single-byte opcode or a single-byte opcode with a rex prefix. supporting these specially means that we don't have to length-check on every byte or go through the full decode loop while reading the most likely instructions. this is a significant improvement on typical x86 streams, but comes at a moderate penalty for crafted x86 instructions. the penalty is still not very bad, as the fast path is exited in favor of the full decode loop as soon as we see a non-rex prefix byte; this adds maybe a dozen instructions to the slow path.
2022-12-03just a bit more code motion that seemed to help things sometimesiximeow
2022-12-03reorder prefix checks, extract vex/evex prefix handlingiximeow
sharing vex/evex invalid prefix checks improves codegen a bit, but ordering prefix checks by likeliest prefix first reduces time falling through prefix handling arms. both together are a notable improvement in throughput on typical x86 code. bundled in here is some code motion to where `mem_size = 0` and `operand_count = 2` are executed; this is because, at least on zen2 and cascade lake parts, bunching all stores to the instruction together caused small stalls getting into the decoder. spreading out stores seems to mix these assignments with parts of code that was not using memory anyway, and pipelines better.
2022-12-03move opcode lookup tables into const arraysiximeow
cleanliness, but also slightly better codegen somehow?
2022-12-03replace size lookup logic with a LUTiximeow
the match compiled into some indirect branch awfulness!! no thank you
2022-09-23Fix some typos.Bruce Mitchener
2022-05-07more annotation fixes?iximeow
2022-04-24fix a few issues preventing no-std builds from ... buildingiximeow
this includes a `Makefile` that exercises the various crate configs. most annoyingly, several doc comments needed to grow `#[cfg(feature="fmt")]` blocks so docs continue to build with that feature enabled or disabled. carved out a way to run exhaustive tests; they should be written as `#[ignore]`, and then the makefile will run even ignored tests on the expectation that this will run the exhaustive (but slower) suite. exhaustive tests are not yet written. they'll probably involve spanning 4 byte sequences from 0 to 2^32-1.
2022-01-02Wrap unsafe functions to catch errors in debug5225225
Closes https://github.com/iximeow/yaxpeax-x86/issues/16
2021-12-19fix incorrect memory size for f30f1e-style nopiximeow
not only did the instruction have wrong data, but if displayed, the formatter would panic.
2021-12-19test that invalid RegSpec constructions panic as expectediximeow
in the process, fix 64-bit rex-byte limit, 32/16-bit mode mask reg limit
2021-10-10support endbr{32,64}iximeow
2021-10-10export `InstructionDisplayer` (#9)i509VCB
This makes generated docs refer to a type and show said type in the list of all structs rather than rustdoc showing gray text in return types. quote doc references
2021-08-22bump to yaxpeax-arch 0.2.7 and proper field description support1.1.0iximeow
2021-08-22add 16/32-bit opcode/operand boundary desc, consistentify memory descriptionsiximeow
2021-08-21add `AnnotatingDecoder` note to CHANGELOG and publicize descriptionsiximeow
2021-08-21maintain pre-annotation inlining propertiesiximeow
this gets yaxpeax-x86 in no-inline configurations back to building as it did before, but is quite a blunt hammer. it seems that extra calls to `sink.record` trips the inlining thresholds for `read_with_annotation`, and then its caller, and its caller, even when one of them is just a delegation to its inner call. this is particularly unfortunate because yaxpeax-x86 is now making a decision about the inlining of a rather large function at the public edge of its API, but these attributes match the inlining decisions that LLVM was making before adding `DescriptionSink`. hopefully not too bad. not sure how to handle this in the future.
2021-08-21add descriptions for other prefixes, 16-bit addressingiximeow
2021-08-21add description reporting for segment prefixes and opcodes for 32-bit and 16-bitiximeow
2021-08-21extend decoder annotation through all of 64-, 32-, and 16-bit modesiximeow
2021-08-21force read_sib inlining in 64-bit modeiximeow
even though NullSink is no-ops, it causes llvm to not inline this function, for a net perf reduction
2021-08-21extend annotation reporting to 32- and 16-bit modes, kindaiximeow
2021-08-21wipiximeow
2021-08-21fix incorrect decoding of 0x9*-series instructions with rex.biximeow
2021-08-21report memory sizes for push, pop, call, retiximeow
these instructions had memory sizes reported for the operand, if it was a memory operand, but for versions with non-memory operands the decoded `Instruction` would imply that non memory access would happen at all. now, decoded instructions in these cases will report a more useful memory size.
2021-08-14delcare pub const fn constructors for all gp registers, segment registers, ↵iximeow
and ip/flags
2021-08-12add RegSpec::rbx() helper (#6)chc4
2021-07-22fix incorrect decodes with scas and 67-prefixes1.0.4iximeow
2021-07-04update yaxpeax-arch to 0.2.0 and update DecodeError implsiximeow
2021-07-04update crate to rust 2018iximeow
2021-07-04support xacquire/xrelease prefixingiximeow
2021-07-04fix several incorrect tests and docs in 64- and 32-bit modesiximeow
2021-07-03update protected_mode to match long_mode docs, apisiximeow
2021-07-03update DecodeError implsiximeow
2021-07-03document public members in long_modeiximeow
2021-07-03write some dang docs, export `MemoryAccessSize` where you'll look for itiximeow
2021-07-03more carefully test mmx operand sizesiximeow
2021-07-03factor out MemoryAccessSizeiximeow
2021-07-03add tests for MemoryAccessSize, consistentify style on docsiximeow
2021-07-03be more strict about denying invalid operandsiximeow
2021-07-03do not reject prefixed sgdt, add a TODO for xopiximeow
not that xop will ever be wanted, rip
2021-07-03support AMD `sev_snp`iximeow
2021-07-03defer checking invalid lengths for multi-prefix instructionsiximeow
this profiles slightly better? not entirely sure why...
2021-07-03document some of the weird decisions in read_instriximeow
2021-07-03clean up x86_32 and make interfaces match x86_64iximeow
2021-07-03prefixes on 0f01-series opcodes are more strictiximeow
generated by cgit v1.1 at 2024-11-01 03:45:16 +0000