The smallest Hello World program
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The smallest Hello World program
1–10 of 53 posts
Re: The smallest Hello World program
#2These challenges are funny - they remind me of the old days. Back in the DOS/Windows days, we used to have the .com format, which was perfect for tiny programs. One could even write a program of less than 10 bytes that could actually do something!
We've come a long way since then, and is like, at some point, nobody cared about optimizing executable size anymore
Re: The smallest Hello World program
#3Linking a similar, very popular past example of this:
Teensy: https://www.muppetlabs.com/~breadbox/software/tiny/teensy.ht...
Re: The smallest Hello World program
#4Now, can we make it even smaller applying https://nathanotterness.com/2021/10/tiny_elf_modernized.html ? We shouldn't need the full ELF header...
Re: The smallest Hello World program
#5These challenges are funny - they remind me of the old days. Back in the DOS/Windows days, we used to have the .com format, which was perfect for tiny programs. One could even write a program of less than 10 bytes that could actually do something! We've come a long way since then, and is like, at some point, nobody cared about optimizing executable size anymore
JMP FFFF:0000
Re: The smallest Hello World program
#6Now, can we make it even smaller applying https://nathanotterness.com/2021/10/tiny_elf_modernized.html ? We shouldn't need the full ELF header...
Oh it has been done: https://nathanotterness.com/2021/10/hello_105.asm
Re: The smallest Hello World program
#7This is pretty bad. Let's start with the very first instruction:
mov rax, 1
nasm will optimize this to the equivalent "mov eax, 1", that's 6 bytes, but still:
xor eax, eax ; 2 bytes
inc eax ; 2 bytes
mov rdi, 1
Re: The smallest Hello World program
#8My favorite language for implementing short Hello World programs in is HQ9+ [1].
Joking aside, this page [2] used to be a great tutorial on writing small ELF binaries, but I'm not sure whether it will still work in 64-bit land. It proved very helpful for writing a 4K intro back in 1999.
[1] https://esolangs.org/wiki/HQ9%2B
[2] https://www.muppetlabs.com/~breadbox/software/tiny/teensy.ht...
Re: The smallest Hello World program
#9Could a script be a program?
Because it would be much smaller in a bat file than contains :
echo Hello World!
Re: The smallest Hello World program
#10This is pretty bad. Let's start with the very first instruction: mov rax, 1 An actual "mov rax, 1" would assemble to 48 B8 01 00 00 00 00 00 00 00, a whopping TEN bytes. nasm will optimize this to the equivalent "mov eax, 1", that's 6 bytes, but still: xor eax, eax ; 2 bytes inc eax ; 2 bytes would be much smaller. Second line: mov rdi, 1 You already have the value 1 in eax, so a "mov edi, eax" (two bytes) would suff…
push 1
pop rax