Add x86 syscalls

[SamTebbs33]

This patch adds syscalls for x86. They are triggered by putting the syscall number in eax then trriggering interrupt 128 (The same as linux). It adds support for calling syscalls with a maximum of 5 arguments. Closes #36

[DrDeano]

Sorry for the brutal commenting

[DrDeano]

I was wondering, is it possible to have a run time test for calling a fake syscall, could just have something hard coded for now, but then could extend this out to a proper runtime testing that can call test functions. So could pass a boolean into the build of the kernel which it can check

[SamTebbs33]

I was wondering, is it possible to have a run time test for calling a fake syscall, could just have something hard coded for now, but then could extend this out to a proper runtime testing that can call test functions. So could pass a boolean into the build of the kernel which it can check

Yeah I could add a test that always runs when the kernel boots, and later move it to a proper runtime test when we figure out how to pass options to the build.

[SamTebbs33]

I was wondering, is it possible to have a run time test for calling a fake syscall, could just have something hard coded for now, but then could extend this out to a proper runtime testing that can call test functions. So could pass a boolean into the build of the kernel which it can check

Yeah I could add a test that always runs when the kernel boots, and later move it to a proper runtime test when we figure out how to pass options to the build.

I've actually found out how to pass options to the build so I will make a PR for that and add a syscall runtime test as part of #60

[SamTebbs33]

I actually don't think this is quite ready to be merged yet since I need to do some more investigation on how syscall arguments should be handled.

[SamTebbs33]

Ok I did some experimentation and made the syscall triggering much better and able to pass arguments. Ready for a review!

[DrDeano]

Also, wheres those runtime tests :P

[SamTebbs33]

Also, wheres those runtime tests :P

Waiting for the build options to be merged :p I actually need to improve that patch a little. Will do so when I can.

[DrDeano]

No problem, shall I'll wait until the build options PR is done

[SamTebbs33]

No problem, shall I'll wait until the build options PR is done

Alright that one should be ready now. I added some replies here too

[DrDeano]

I keep finding things soz. Have a small change, I have a lot of comments lol

[DrDeano]

lgtm :)