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boot2c - a simple way to write standalone programs for i386 https://forum.osdev.org/viewtopic.php?f=2&t=35010 |
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Author: | luke64 [ Mon Sep 30, 2019 7:00 am ] |
Post subject: | boot2c - a simple way to write standalone programs for i386 |
Hi there, I was recently wondering how hard would it be to run C programs on i386 without an OS, and created a GitHub repo to share my approach. I traded portability for simplicity, so it's not the most correct way, but maybe someone will find it useful: https://github.com/luke8086/boot2c Any feedback will be appreciated! |
Author: | iansjack [ Mon Sep 30, 2019 8:38 am ] |
Post subject: | Re: boot2c - a simple way to write standalone programs for i |
You ask in your readme.md Quote: So why bother doing such a thing in 2019? I've got to agree - why, when it is so simple to produce bootable DOS media which would allow you access to more facilities?
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Author: | luke64 [ Mon Sep 30, 2019 9:41 am ] |
Post subject: | Re: boot2c - a simple way to write standalone programs for i |
Quote: I've got to agree - why, when it is so simple to produce bootable DOS media which would allow you access to more facilities? Well, the whole premise was not to use any operating system. |
Author: | bzt [ Fri Oct 04, 2019 5:19 am ] |
Post subject: | Re: boot2c - a simple way to write standalone programs for i |
Hi, luke64 wrote: I was recently wondering how hard would it be to run C programs on i386 without an OS Are you familiar with Bellard's Tiny C compiler? It is capable of compiling and running C programs in memory (no disks involved). It is perfectly valid to do some script like this under Linux:Code: #!/usr/local/bin/tcc -run Using this feature you can truly boot a C program directly, compiled at boot time. However you'll need to integrate a minimal libc at least.#include <stdio.h> int main() { printf("Hello World\n"); return 0; } Cheers, bzt |
Author: | alexfru [ Fri Oct 04, 2019 10:48 am ] |
Post subject: | Re: boot2c - a simple way to write standalone programs for i |
Or Smaller C + e.g. BootProg (or FreeDOS). Unreal mode is supported by the compiler. |
Author: | eekee [ Fri Dec 27, 2019 4:13 pm ] |
Post subject: | Re: boot2c - a simple way to write standalone programs for i |
luke64 wrote: I was recently wondering how hard would it be to run C programs on i386 without an OS, and created a GitHub repo to share my approach. I traded portability for simplicity, so it's not the most correct way, but maybe someone will find it useful: If I was writing my OS in C, I'd almost be interested. I wouldn't because I'm not so keen on gcc & clang. I'd rather use Watcom or bcc which takes away the fun for you because they can do this already. Or I guess Smaller C, which is evidently better than bcc and might be better than Watcom for making bootable images. I'm a bit impressed by the build process producing a USB boot image, USB boot is a bit difficult. Char-cell snake gives me retro feels. If you add editing and search to hexview, it could be a useful debugging tool for native OSdev. Especially regexp search; could you just link in a suitable library? |
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