rasm2 jeq tricore diassembly error · radareorg/radare2#15912

(4 留言) (0 反應) (0 負責人)C (23,826 star) (3,229 fork)batch import

RAsm-Disassemblergood first issuetest-required

描述

rasm2  -a tricore -D 'be22'

0x800898ee   2                     be22  .hword 0x22be

should be jeq d15, d2, 0x80089912 (from ghidra)

技術棧: c
領域: clitooling
議題類型: bug
難度: 3
預計時間: 1-3 hours
活動狀態: stale
清晰度: clear
前置要求: C programmingradare2 basicstricore architecture basics
新手友善度: 45
研究方向: First, locate the tricore disassembler source file(s) in radare2, likely under libr/asm/arch/tricore/. Examine the opcode table and decoding logic for the 'jeq' instruction. Compare the hex bytes 'be22' with the expected instruction format. Check if the issue is a missing or incorrect opcode entry, or a bug in byte order handling. Write a small test case using rasm2 to reproduce the issue. Review any existing tricore tests for reference. After identifying the faulty code, implement the fix and verify with the given example. Ensure the fix does not break other tricore disassembly.