![]() ![]() s is the file extension of an assembly source file. Typical usage of AS: $ as -o errcode.o errcode.s ![]() It’s platform specific and designed to be ran through a linker in order to generate an executable binary. When we execute AS, it will produce an ‘object file’, this is the machine code produced by the assembler (AS). ![]() This post is focused primarily on assembly that we will write from scratch, and as such we won’t be spending much time looking at GCC. GCC is a cross language compiler from GNU, it can compile many languages, including C, and produce many outputs, including executable binaries, object files and even assembly. It’s designed to take the output from GCC and build object files for linking with LD into executable binaries (which we will talk about later). AS - The GNU AssemblerĪS is the GNU families assembler. This post is a republication of from my blog. This post isn’t groundbreaking, but, if you’re a newbie to assembly or under the hood low level operations of a Unix-like system, this may be a good read for you. Primarily, we’re going to be focusing on assembly language, as, ld, objdump and strace. Infact, let’s talk about everything you need to begin writing assembly, inspecting your binary files, and understanding what's going on at a syscall level.
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