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| author | iximeow <me@iximeow.net> | 2026-08-03 00:25:39 +0000 |
|---|---|---|
| committer | iximeow <me@iximeow.net> | 2026-08-03 00:25:39 +0000 |
| commit | ee19aba4c34f495d29c87b6d2c9d32614ba62cf8 (patch) | |
| tree | 0a8b685c4dfe3328cf3a58e5c83ca32b9a69b8c9 /src/armv7/thumb.rs | |
| parent | 1158b671a39d01ce3de822c814d4d3bae3466918 (diff) | |
decode unknown wide hints like any other hints
Diffstat (limited to 'src/armv7/thumb.rs')
| -rw-r--r-- | src/armv7/thumb.rs | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/src/armv7/thumb.rs b/src/armv7/thumb.rs index ab3f94b..cba18a4 100644 --- a/src/armv7/thumb.rs +++ b/src/armv7/thumb.rs @@ -1808,8 +1808,25 @@ pub fn decode_into<T: Reader<<ARMv7 as Arch>::Address, <ARMv7 as Arch>::Word>>(d Operand::Nothing, ]; } - _ => { - return Err(DecodeError::Undefined); + hint => { + // from DDI0406 C.d (v7): + // > Encodings with op1 set to 0b000 and a value of + // > op2 that is not shown in the table are + // > unallocated hints, and behave as if op2 is set + // > to 0b00000000. These unallocated hint encodings + // > are reserved and software must not use them. + // + // so.. it would be "right" to report these as + // "nop", but the hint operand is interesting for + // forward compatibility. guess that means we + // invent a "hint" instruction too? + inst.opcode = Opcode::HINT; + inst.operands = [ + Operand::Imm12(hint as u16), + Operand::Nothing, + Operand::Nothing, + Operand::Nothing, + ]; } } } |