Question: The syscalls, such as sys_read(), sys_write() and sys_exit() are x64 assembly language instructions specified by the chip maker, such as Intel Corporation or American Microwave

The syscalls, such as sys_read(), sys_write() and sys_exit() are

x64 assembly language instructions specified by the chip maker, such as Intel Corporation or American Microwave Devices Corp.

assembler-dependent (e.g., NASM, YASM) operating systems calls for input/output, exit etc. that need OS kernel functions.

programmer defined code just like user-defined functions in C++.

library functions from C/C++ that help an assembler pass control to OS kernel.

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