Raunak
@rrampage.bsky.social
Bored Programmer | Interested in distributed systems, databases | On a quest to build minimal software
• https://rrampage.github.io
• https://github.com/rrampage/
• https://rrampage.github.io
• https://github.com/rrampage/
Built a tiny Hello World ARM64 ELF kernel which boots in a UEFI shell on QEMU. It compiles to a 193 byte binary.
Learning a lot about bootloaders, ARM64 device trees, QEMU. Would love links to useful resources and tips for debugging
Code: gist.github.com/rrampage/c66...
Learning a lot about bootloaders, ARM64 device trees, QEMU. Would love links to useful resources and tips for debugging
Code: gist.github.com/rrampage/c66...
July 16, 2025 at 6:31 AM
Built a tiny Hello World ARM64 ELF kernel which boots in a UEFI shell on QEMU. It compiles to a 193 byte binary.
Learning a lot about bootloaders, ARM64 device trees, QEMU. Would love links to useful resources and tips for debugging
Code: gist.github.com/rrampage/c66...
Learning a lot about bootloaders, ARM64 device trees, QEMU. Would love links to useful resources and tips for debugging
Code: gist.github.com/rrampage/c66...
Reposted by Raunak
Solved the JIT calculator challenge using ARM64 assembly. This challenge helped me understand the mechanisms on executing JIT code on Linux. Learned more about the memfd_create and mmap syscalls.
Code: gist.github.com/rrampage/8d1...
Challenge: ochagavia.nl/blog/the-jit...
#linux #arm64
Code: gist.github.com/rrampage/8d1...
Challenge: ochagavia.nl/blog/the-jit...
#linux #arm64
JIT calculator
JIT calculator. GitHub Gist: instantly share code, notes, and snippets.
gist.github.com
July 1, 2025 at 10:20 PM
Solved the JIT calculator challenge using ARM64 assembly. This challenge helped me understand the mechanisms on executing JIT code on Linux. Learned more about the memfd_create and mmap syscalls.
Code: gist.github.com/rrampage/8d1...
Challenge: ochagavia.nl/blog/the-jit...
#linux #arm64
Code: gist.github.com/rrampage/8d1...
Challenge: ochagavia.nl/blog/the-jit...
#linux #arm64
Solved the JIT calculator challenge using ARM64 assembly. This challenge helped me understand the mechanisms on executing JIT code on Linux. Learned more about the memfd_create and mmap syscalls.
Code: gist.github.com/rrampage/8d1...
Challenge: ochagavia.nl/blog/the-jit...
#linux #arm64
Code: gist.github.com/rrampage/8d1...
Challenge: ochagavia.nl/blog/the-jit...
#linux #arm64
JIT calculator
JIT calculator. GitHub Gist: instantly share code, notes, and snippets.
gist.github.com
July 1, 2025 at 10:20 PM
Solved the JIT calculator challenge using ARM64 assembly. This challenge helped me understand the mechanisms on executing JIT code on Linux. Learned more about the memfd_create and mmap syscalls.
Code: gist.github.com/rrampage/8d1...
Challenge: ochagavia.nl/blog/the-jit...
#linux #arm64
Code: gist.github.com/rrampage/8d1...
Challenge: ochagavia.nl/blog/the-jit...
#linux #arm64
Hand-crafted ELF in ARM64 assembly (no linker!): gist.github.com/rrampage/745...
Wrote the ELF headers in the assembly file. Uses `as` to create the object file and `objcopy` to fish out the binary which is a valid ELF. ELF headers overhead is 120 bytes. Code is 12 bytes. #linux #arm64 #elf
Wrote the ELF headers in the assembly file. Uses `as` to create the object file and `objcopy` to fish out the binary which is a valid ELF. ELF headers overhead is 120 bytes. Code is 12 bytes. #linux #arm64 #elf
Handcrafted Elf Binary from assembly (without linker)
Handcrafted Elf Binary from assembly (without linker) - teensy.S
gist.github.com
June 26, 2025 at 12:45 PM
Hand-crafted ELF in ARM64 assembly (no linker!): gist.github.com/rrampage/745...
Wrote the ELF headers in the assembly file. Uses `as` to create the object file and `objcopy` to fish out the binary which is a valid ELF. ELF headers overhead is 120 bytes. Code is 12 bytes. #linux #arm64 #elf
Wrote the ELF headers in the assembly file. Uses `as` to create the object file and `objcopy` to fish out the binary which is a valid ELF. ELF headers overhead is 120 bytes. Code is 12 bytes. #linux #arm64 #elf
ARM64 implementation of `yes` utility, similar throughput as GNU yes. Compiles to 176 bytes! Code: gist.github.com/rrampage/157...
#linux #arm
#linux #arm
June 24, 2025 at 11:05 PM
ARM64 implementation of `yes` utility, similar throughput as GNU yes. Compiles to 176 bytes! Code: gist.github.com/rrampage/157...
#linux #arm
#linux #arm
Wrote up a small post on using strace to better debug Linux programs: rrampage.github.io/2025/06/13/s...
#linux #strace #debug
#linux #strace #debug
strace tips for better debugging
Recently, I have been building software without libc to better understand Linux syscalls and internals better. So far, I have built a minimal shell, terminal Snake game, pure ARM64 assembly HTTP serve...
rrampage.github.io
June 13, 2025 at 3:56 PM
Wrote up a small post on using strace to better debug Linux programs: rrampage.github.io/2025/06/13/s...
#linux #strace #debug
#linux #strace #debug
A minimal Linux shell in C and Zig: gist.github.com/rrampage/504...
- <10 kb executables (using `zig cc` for C and `- O ReleaseSmall` for Zig)
- Uses `clone3` instead of `fork`, `getdents64` to check for file name in large directories, `execveat` to open binary from `dirfd` used in getdents64
#zig
- <10 kb executables (using `zig cc` for C and `- O ReleaseSmall` for Zig)
- Uses `clone3` instead of `fork`, `getdents64` to check for file name in large directories, `execveat` to open binary from `dirfd` used in getdents64
#zig
Minimal Linux shell (C, Zig and ASM)
Minimal Linux shell (C, Zig and ASM). GitHub Gist: instantly share code, notes, and snippets.
gist.github.com
May 2, 2025 at 10:17 AM
A minimal Linux shell in C and Zig: gist.github.com/rrampage/504...
- <10 kb executables (using `zig cc` for C and `- O ReleaseSmall` for Zig)
- Uses `clone3` instead of `fork`, `getdents64` to check for file name in large directories, `execveat` to open binary from `dirfd` used in getdents64
#zig
- <10 kb executables (using `zig cc` for C and `- O ReleaseSmall` for Zig)
- Uses `clone3` instead of `fork`, `getdents64` to check for file name in large directories, `execveat` to open binary from `dirfd` used in getdents64
#zig
TIL you can start a SSH session in screen/tmux which will auto-end on detach e.g `ssh user@server -t tmux new-session -A -s S1` or `ssh user@server -t screen -d -R S1`. This will create a session "S1" if it does not exist and attach to "S1" if it exists. Useful for running commands on flaky network
April 21, 2025 at 6:31 AM
TIL you can start a SSH session in screen/tmux which will auto-end on detach e.g `ssh user@server -t tmux new-session -A -s S1` or `ssh user@server -t screen -d -R S1`. This will create a session "S1" if it does not exist and attach to "S1" if it exists. Useful for running commands on flaky network
@mtlynch.io Followed your awesome post mtlynch.io/notes/nix-or... to get NixOS painlessly setup on OCI ARM
Install NixOS on a Free Oracle Cloud VM
Oracle is not a very popular cloud hosting service, but they have an unusually attractive free tier offering. You can run the following two VMs for free 24/7:
4 CPU / 24 GB RAM Ampere A1 ARM VM
1 CPU...
mtlynch.io
April 11, 2025 at 11:08 PM
@mtlynch.io Followed your awesome post mtlynch.io/notes/nix-or... to get NixOS painlessly setup on OCI ARM
Hyderabad boi attending Hytradboi :)
#hytradboi
#hytradboi
HYTRADBOI is tomorrow! Feb 28 0900 PDT. The chat will run for days, so it's worth joining even if you can't make the early hours.
Bring all your friends too! Re-skeet, share on your favorite forum, put flyers under your neighbours doors etc.
See you tomorrow!
www.hytradboi.com/2025/#tickets
Bring all your friends too! Re-skeet, share on your favorite forum, put flyers under your neighbours doors etc.
See you tomorrow!
www.hytradboi.com/2025/#tickets
HYTRADBOI 2025
HYTRADBOI is a fun online conference about databases, programming languages, and everything in between.
www.hytradboi.com
February 28, 2025 at 8:49 PM
Hyderabad boi attending Hytradboi :)
#hytradboi
#hytradboi
Reposted by Raunak
📢 Episode 222 is out! 📢 In this episode, @elbeno.com and I chat with @tristanbrindle.com about graph algorithms resources 📊, tropical semirings 🌴, Stepanov stories 📖, FM2GP 📓, EOP 📙, TV shows & movies 📺 and more! adspthepodcast.com/2025/02/21/E...
February 21, 2025 at 1:23 PM
📢 Episode 222 is out! 📢 In this episode, @elbeno.com and I chat with @tristanbrindle.com about graph algorithms resources 📊, tropical semirings 🌴, Stepanov stories 📖, FM2GP 📓, EOP 📙, TV shows & movies 📺 and more! adspthepodcast.com/2025/02/21/E...
Reposted by Raunak
Okay, these challenges are addictive! Finished the 2025.1 challenge and solved 2024.4, 2024.3 and 2024.2 challenges from Internet archive. Loved how each challenge focuses on a small set of operators and makes us use them in various devious combinations to solve the problems #APL #Dyalog
February 19, 2025 at 6:38 PM
Enjoying learning APL by doing the Dyalog APL challenge (challenge.dyalog.com) #apl
The APL Challenge
A free-to-enter competition that could change the way you think...and put $100 in your pocket.
challenge.dyalog.com
February 19, 2025 at 11:32 AM
Enjoying learning APL by doing the Dyalog APL challenge (challenge.dyalog.com) #apl