marcothms
a4dc420d60
fix(disasm): only prepend ptr when modrmtarget is memory
2025-06-10 21:07:28 +09:00
marcothms
7479021d36
ft: impl most arithmatic ops, dec, inc
2025-06-10 20:57:31 +09:00
marcothms
037d74ac6a
fix: dont always flip sign_extend msb
2025-06-10 20:00:07 +09:00
marcothms
3756ada3e0
fix: correctly sign-extend instead of plain byte to word cast
2025-06-10 15:54:25 +09:00
marcothms
5529fc0b89
ft: impl flag setting closure for binary operations
2025-06-10 14:38:13 +09:00
marcothms
35fefb7625
ft(interpreter): generalize binary operations
2025-06-10 10:59:35 +09:00
marcothms
2b37884a60
fix: align interrupt data with minix src
2025-06-10 09:44:34 +09:00
marcothms
232b73aad8
chore: Rename Operand -> ImmediateOperand
2025-06-05 10:08:35 +09:00
marcothms
ef4663a245
ft: abstract and implement ADD::* interpretation
2025-06-04 23:01:04 +09:00
marcothms
ac69d75273
ft: initial work in interpreter
2025-06-03 21:31:28 +09:00
marcothms
5ee80c9364
fix: read data section as words, not bytes
2025-06-03 10:30:35 +09:00
marcothms
4c63b7a21a
ft: add dump flag
2025-05-28 16:00:18 +09:00
marcothms
7e8fdeba54
ft: implement missing lock instruction
2025-05-28 14:23:56 +09:00
marcothms
a21cc2b4b3
ft: add debug script
2025-05-28 14:13:12 +09:00
marcothms
c396d33f76
fix: align pointer parsing with spec
...
Previously pointer parsing was completely wrong.
Now split into Pointer32 for immediates with
segment;offset and Pointer16 for short jumps, which
use DS or ES as segment and the Pointer16 value
as offset.
2025-05-28 13:31:14 +09:00
marcothms
0893969f4e
chore: whole swoop of enhanced documentation
2025-05-28 09:41:40 +09:00
marcothms
322a276617
fix: dont interpret padding as instructions
...
a.out padds the text section with 0-bytes, which where interpreted
as 0x00 0x00 instruction and occasionally as a single 0x00 byte. Add
logic to ignore single 0x00 bytes and to remove dangling 0x00 0x00
instructions at the end of the instruction vec, so only the 'actual'
instructions are presented in the end. Also adjust visibility of
methods, so only the truncated instructions will ever be presented.
Of course, this could remove an actual `0x00 0x00` instruction from the
end, but they would not have any effect on execution anyway.
2025-05-27 11:13:16 +09:00
marcothms
5c8702fb95
fix: only push raw instruction once
2025-05-27 09:37:57 +09:00
marcothms
3463b5b4ae
chore: fix panic
...
ModRM parsing still used old parsing style.
2025-05-27 09:21:40 +09:00
marcothms
8ea91d80b8
ft: add first basic test
2025-05-25 21:20:12 +09:00
marcothms
35207d23f0
chore: add nice debug output
2025-05-25 21:06:47 +09:00
marcothms
f9ae0dc6ee
chore: move pointer parsing function to disasm module
2025-05-25 20:31:55 +09:00
marcothms
74e936ab76
chore: replace all panic's with proper error propagation
2025-05-25 15:45:09 +09:00
marcothms
73b1a99cbd
ft: Implement memory pointer (Mp) operand
2025-05-25 11:00:47 +09:00
marcothms
6762195378
chore: show raw pointer value in disasm
2025-05-25 10:27:32 +09:00
marcothms
90fb88aec6
chore: fix byte/word size ambiguitis in disasm output
2025-05-25 10:09:23 +09:00
marcothms
058afeb7ba
chore: split up some structs and add comments
2025-05-20 18:59:09 +09:00
marcothms
48eeff16fa
chore: align disasm print more with objdump(1)
2025-05-20 11:28:23 +09:00
marcothms
beccff0d79
chore: update metadata
2025-05-20 11:22:35 +09:00
marcothms
1173dd3d63
chore: output parity for hex
...
Output all immediate bytes and words as hex.
2025-05-20 11:02:46 +09:00
marcothms
ac78e9705c
fix: correctly parse jump bytes
...
Previously only a single byte was read and saved,
but the J-byte means, that the read signed-byte
must be added to the address of the next
instruction.
2025-05-20 10:56:54 +09:00
marcothms
3fe58e8bac
ft: implement fmt::Display for all mnemonics
2025-05-20 10:46:52 +09:00
marcothms
fd15e57569
fix: correctly add displacement for short jumps
2025-05-20 10:12:13 +09:00
marcothms
cb924af0fb
chore: naming parity
2025-05-15 23:15:22 +09:00
marcothms
1c7ddbe9fa
fix: use unsigned Operand type for immediates
2025-05-15 09:28:28 +09:00
marcothms
8ff92c81b3
ft: decode last set of instructions
2025-05-15 08:32:49 +09:00
marcothms
fbec2ddad9
ft: add documentation section to Readme
2025-05-15 01:20:47 +02:00
marcothms
db6d7c30a9
fix: typo in cargo.toml
2025-05-14 20:55:30 +09:00
marcothms
beec1ae161
ft: Add Readme
2025-05-14 13:52:02 +02:00
marcothms
45ab158b95
ft: implement some more instructions
2025-05-14 20:38:51 +09:00
marcothms
22d7c5571f
fix: align disasm output correctly
2025-05-14 20:21:13 +09:00
marcothms
1aa3e2ba84
chore: align disasm output with intel spec
2025-05-14 16:11:11 +09:00
marcothms
227f1bd133
fix: fix displacement parsing
...
1. correctly return when only displacement in modrm mem adressing
Previously the disassmbler wouldn't stop if only a displacement value
should be used without any base or offset index.
2. Displacement can be negative, so use the signed version where applicable
2025-05-14 14:36:21 +09:00
marcothms
c0bb448d79
chore: prettify printing
2025-05-14 13:54:13 +09:00
marcothms
5c13267145
ft: implement Group 1 sign extended instruction
2025-05-14 13:45:20 +09:00
marcothms
1f88db75f5
ft: partially implement Group 5 instructions
2025-05-14 13:41:08 +09:00
marcothms
4fa789e6bb
ft: Implement Group 4 Instructions
2025-05-14 13:35:00 +09:00
marcothms
986c99873d
ft: implement Group 2 instructions
2025-05-14 12:12:57 +09:00
marcothms
4252986b7e
ft: implement CALL and JMP instructions
2025-05-14 11:57:00 +09:00
marcothms
38a2782cc6
ft: implement group3a/b instructions
2025-05-14 11:46:09 +09:00
marcothms