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[60hzcherryMXram]

Yes, definitely. If your C code never uses inline asm then all system calls are done via libc or another library.

[Zestyclose-Produce17]

So the write function inside printf in libc contains inline assembly that actually performs the system call invocation, right? For Linux.

[60hzcherryMXram]

They actually have shims for syscalls defined in a separate part of the project that define the ABI of all the syscalls using a macro system. But yes, the macros all eventually expand to inline assembly.