redp
Official documentation doesn't disclose ConstBank0 (c[0x0]) memory layout used at the SASS level for kernel arguments and special registers (like %gridid, %nctaid) So I've spent last week trying to solve this deceptively simple problem. Names of params are documented in official doc - seems that...
redp
Parts 1, 2 & 3First of all, it should be noted that the mask of instruction attributes has size 20 bytes, so I updated dump for them.structure for this attributes descriptor has size 0xd8 bytes and some fields:mask at offset 0name of instruction at 0xC8index at 0xD0 Instructions selecting...
redp
Parts 1 & 2Pseudo instructionsSurprise-surprise - some PTX instructions not mapped directly to underlying SASS 1:1. Instead they generate lots of another PTX code. I already extracted their decrypted bodies, so it's time to describe how they connected to specific PTX pseudo instructions There...
redp
Part 1PTX instructions that cicc cannot generateWhile reverse-engineering Nvidia's compilation pipeline, I extracted the set of PTX instructions that cicc (the CUDA C++ frontend) is capable of emitting. The next logical step is to intersect them with full set of instructions accepted by ptxas - so...
redp
DisclaimerHighly likely that author is an illiterate, inattentive, and incompetent lazy person with a poor imagination - therefore his hypotheses may be questionable, ideas delusional and his analysis simply incorrect. Also maybe I still haven't mastered ida pro in 28 years so extracted data can...