среда, 10 июня 2026 г.

recovering tokens from (f)lex generated code

›
While doing some reverse engineering of ptxas I discovered that their lexer was generated by lex in fast mode (lex -f). Knowing that nvidi...
вторник, 2 июня 2026 г.

RE of PTX grammar from ptxas, part 3

›
Parts 1 & 2 Pseudo instructions Surprise-surprise - some PTX instructions not mapped directly to underlying SASS 1:1. Instead they gene...
четверг, 28 мая 2026 г.

RE of PTX grammar from ptxas, part 2

›
Part 1 PTX instructions that cicc cannot generate While reverse-engineering Nvidia's compilation pipeline, I extracted the set of PTX i...
воскресенье, 24 мая 2026 г.

RE of PTX grammar from ptxas

›
Disclaimer Highly likely that author is an illiterate, inattentive, and incompetent lazy person with a poor imagination - therefore his hypo...
вторник, 14 апреля 2026 г.

SASS latency analysis

›
After extracting latency table I became curious how good the code produced by ptxas. Projects like CuAsmRL never estimated limits of profi...
вторник, 31 марта 2026 г.

dumping llvm bitcode from cicc

›
method 1 requires building of hijacked .so with appropriate LLVM version. I am too lazy for this   method 2 cool, but does not work - cicc...
четверг, 26 марта 2026 г.

dwarf from nvcc

›
I've add some support of DWARF debug info from nvidia nvcc to my dwarfdump . As everyone knows dwarf is over-complicated, fat and just ...