I am using the Hopper Disassembler to reverse engineer an iOS library. In principle, in the beginning, everything is clear and logical. But I can't find information about asm. What does asm mean? Is this a function call? If this is a function, what does it do? Thanks!
It's inline assembly, equivalent to the asm keyword in C. Wikipedia might serve as an introduction.
You almost certainly get this because Hopper fails to properly decompile the instruction. In your case it's arm64 assembly (formally the A64 instruction set) as outlined in the ARMv8 Reference Manual.
Also, xN or wN in assembly should correspond to rN in the decompiled code, so you should be able to make some sense of the output you get.
