A toy operating system written in C.
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bits 64
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global read
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read:
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mov rax, 0
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syscall
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ret
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global write
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write:
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mov rax, 1
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syscall
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ret
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global getcwd
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getcwd:
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mov rax, 2
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syscall
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ret
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global chdir
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chdir:
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mov rax, 3
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syscall
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ret
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global spawn
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spawn:
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mov rax, 4
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syscall
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ret
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global exit
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exit:
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mov rax, 60
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syscall
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; never returns
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