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General protection fault after reloading CS https://forum.osdev.org/viewtopic.php?f=1&t=56290 |
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Author: | LolzDEV [ Wed May 25, 2022 2:49 am ] |
Post subject: | General protection fault after reloading CS |
I'm following the GDT guide but according to gdb Code: jmp 0x08:reload_cs is causing a "General Protection Fault" (0xd), according to the wiki this exception is thrown when a code segment is used improperly but as far as I understand if the GDT is not set segmentation is not enabled. What's going on? I cannot really understandPS: I'm using GRUB2 as bootloader with Multiboot2 specification and I'm in protected mode |
Author: | Octocontrabass [ Wed May 25, 2022 5:32 pm ] |
Post subject: | Re: General protection fault after reloading CS |
LolzDEV wrote: as far as I understand if the GDT is not set segmentation is not enabled. Segmentation is always enabled. LolzDEV wrote: What's going on? The CPU is unable to use the segment descriptor corresponding to segment selector 8 as a code segment.
It's hard to say for sure without more information. For example, post a link to your git repository, or provide a register dump using QEMU's "-d int" option. |
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