mykola/Parsable-Instructions
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

update on plan

Browse source
This commit is contained in:
mykola2312 2024-08-01 00:33:01 +03:00
parent e8ae5937f8
commit 954e5cc96a
1 changed files with 4 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
plan.txt
View file

@ -1,4 +1,4 @@
Just parse all prefixes and skip them, but some of the prefixes like 0x66 can dictate size of immediate
"args" parser field would tell if instruction has immediate and what type it could be,
while "op_enc" dictates presense of ModRM, and ModRM tells if instruction has SIB byte.
Decode VEX prefixes. 0xC5 for 3-byte VEX and 0xC4 for 2-byte prefix
The Intel OpCode Syntax can tell if there is ModRM byte, as well as if registers is being encoded in opcode (rb for example),
and can tell size of immediate (ib iw id for example). The /digit can also indiciate presense of ModRM.
The size of displacement is also dictated by cw/cd.
VEX prefixes. 0xC5 for 3-byte VEX and 0xC4 for 2-byte prefix