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Henrik RydgårdandClaude Opus 5
917cb1b0fc
KL4E is Sony's second compression scheme for ~PSP modules, alongside gzip: LZ77 tokens where every bit is arithmetic-coded, structurally close to LZMA. PPSSPP could detect it but not decode it, so any module packed with it failed to load at all - the loader reached the gzip path and bailed there. Which scheme a compressed module uses is now decided by the payload's own magic rather than assuming gzip. On a 6.61 flash0 dump this takes the kd/ modules that load from 126 to 129 of 129; libmp3.prx, libaac.prx and libmp4.prx were the ones affected, and libmp3.prx decompresses to exactly the elf_size its PRX header declares. Two bounds problems in the format are fixed rather than reproduced: the match copy is unchecked against the output buffer on real hardware, so a crafted stream can write up to 255 bytes past it, and a long enough distance code indexes copyDistProbs out of range. Input reads are bounded too - the format carries no length and trusts the stream to terminate itself. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
================================================================ NOTE: These are legacy instructions for building using ndk-build. We mostly only use this on CI because it's faster than gradle. There might also be some holdouts around still using eclipse. ================================================================ First, build the C++ static library: > cd android > ./ab.sh Or > ./ab.cmd as appropriate. Start Eclipse, import the android directory as an existing project You need to also load the "native" project into your eclipse workspace Build and run. If you modify the C++ code, you need to rebuild the static library, of course. To get Eclipse to understand that you have in fact changed something if you haven't also changed any Java code, just add a space character to PPSSPPActivity.java, or right click the project and choose Refresh, and then relaunch the app on the device. A real Android device is strongly recommended for testing. Don't trust the emulator.