How to make a GDT?

[zap8600]

That's a triple fault. The QEMU interrupt log may be useful for finding the problem.

I have attached the log below.

If you see this warning, your code is broken. Fix this warning before you try to debug anything.

I have fixed this issue.

[Octocontrabass]

Your IDT is invalid because this struct is wrong.

[zap8600]

Your IDT is invalid because this struct is wrong.

What would be the correct way to write the struct? I'm using the one from here.

[Octocontrabass]

I'm using the one from here.

Your struct does not match that struct.

[zap8600]

Your struct does not match that struct.

I need to modify ist to be uint8_t and zero to be uint32_t, I believe. I've done that, but it still isn't working.

[Octocontrabass]

Does it change the exceptions that lead up to the triple fault?

[zap8600]

Does it change the exceptions that lead up to the triple fault?

I believe you are taking about the check_exceptions. No, it doesn't.

[Octocontrabass]

In that case, there are probably other IDT issues.

What is the significance of the first parameter to idt_set_gate?

[zap8600]

In that case, there are probably other IDT issues.

What is the significance of the first parameter to idt_set_gate?

I had forgotten about that argument. It was for writing the data to that IDT entry. I've fixed it, but the exceptions haven't changed.

[Octocontrabass]

Has anything in the interrupt log changed?

[zap8600]

Has anything in the interrupt log changed?

Some things have changed. I put the log from an earlier test and the most recent log through diff. I don't think much changes, though. I'll attach the most recent QEMU log and the diff log.

diff.txt

(3.02 KiB) Downloaded 96 times

qemu2.txt

(22.31 KiB) Downloaded 64 times

[devc1]

Reply for need more explanation (Compiling in Windows is easier):

Well, for all the kernel, the drivers and libraries, this is my command line :

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%COMPILE% %srcfiles% %OBJFILES% /Fo:x86_64/ %CFLAGS% /Fe:oskrnlx64.exe /LD /link /OPT:LBR,REF /DLL /MACHINE:x64 /NODEFAULTLIB /SUBSYSTEM:native /ENTRY:KrnlEntry /FIXED:no /DYNAMICBASE /LARGEADDRESSAWARE

I don't have to makefile, linker.ld and all this complicated stuff.

UEFI is just like a library, you can type any function you need at google and it will show, everything is easily setup.


Hey, do you still have the compiling issues ?

[Octocontrabass]

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     1: v=0d e=0008

The error code has changed. This error code indicates a problem loading a segment descriptor from the GDT.

Maybe the selector in your IDT doesn't correspond to a valid code segment in your GDT. I don't see where or how your GDT is set up, though.

[zap8600]

Code: Select all

     1: v=0d e=0008

The error code has changed. This error code indicates a problem loading a segment descriptor from the GDT.

Maybe the selector in your IDT doesn't correspond to a valid code segment in your GDT. I don't see where or how your GDT is set up, though.

I was trying to use the GDT set up by Limine. Should I make my own GDT?

[Octocontrabass]

Limine provides a GDT you can use temporarily. You'll need to set up your own GDT at some point, though.