1c28f027b8
Type 9a (register-file, unconditional): - XREG=bits11-8 (4 bits), YREG=bits3-0 (4 bits), both reg0[] - Discriminated by bits5-4 = 10 - Verified: ar=mx0 xor my0, mr=ax0*ay0(ss) Type 9 standard (conditional): - XOP=bits10-8, YOP=bits12-11, COND=bits3-0 - bits7-4 = 0000 required - Verified: all ALU ops, conditional MAC Type 9 YOP=0: - bits12-11 = 11, bits7-4 = 0000 - Renders f(xop, 0) Type 9 MAC squaring: - bits12-11 = 00, bit4 = 1, bits7-5 = 000 - Renders f(xop^2) Type 9 constant YOP: - CC=bits7-6, BO=bits5-4 - Renders f(xop, const) Tested with open21xx assembler output for 15 instructions. Full regression: isa_test, fir, iir unchanged.
ADSP-219x Reverse Engineering Toolkit
Radare2 architecture plugin and reference materials for reverse engineering ADSP-2191 firmware.
Contents
r2plugin/ Native radare2 arch plugin (C, GNU style)
examples/ ADSP-2191 assembly examples (FIR, IIR, FFT, Viterbi)
+ assembler-verified ISA test ROM
testrom/ Test ROM generator for plugin validation
docs/ Architecture reference, opcode tables, walkthrough guides
Quick Start
cd r2plugin && make && make install
r2 -a adsp219x -b 24 examples/isa_test.bin
[0x00000000]> pd 48
Requirements
- Radare2 >= 5.8.0 (RArchPlugin API)
- GCC
Plugin Status
Currently decodes: NOP, IDLE, Type 1 (multifunction), Type 3 (direct memory), Type 4 (compute + memory), Type 6/7 (immediate loads), Type 10/10a (jump/call), Type 17 (reg move), Type 20 (RTS/RTI).
Work in progress: Type 9/9a (standalone compute), Type 11 (DO UNTIL), Type 15 (shift), Type 18 (mode control), Type 25 (saturate).
Assembler
The examples were assembled with open21xx,
an open-source assembler/linker for ADSP-218x/219x. Build
instructions are in the open21xx README. The resulting ELF is
converted to raw binary with dd (extract the int_pm section).
License
Plugin code: LGPL-3.0-only. Example code from Analog Devices application notes. Documentation extracts from the ADSP-219x DSP Instruction Set Reference.