mirrors/serenity
1
0
Fork 0
mirror of https://github.com/SerenityOS/serenity.git synced 2025-01-24 10:22:05 -05:00
Code Issues Projects Releases Packages Wiki Activity

Kernel: Fix GDT limits

Browse source 
The GDT limits are inclusive, so for correctness we should subtract
one from the structs' size.
This commit is contained in:
Gunnar Beutner 2021-06-25 22:36:17 +02:00 • committed by Andreas Kling
parent ee4fc97038
commit 29d9666e02
1 changed files with 2 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
Kernel/Arch/x86/common/Processor.cpp
View file

@ -1074,7 +1074,7 @@ UNMAP_AFTER_INIT void Processor::gdt_init()
Descriptor fs_descriptor {};
fs_descriptor.set_base(VirtualAddress { this });
fs_descriptor.set_limit(sizeof(Processor));
fs_descriptor.set_limit(sizeof(Processor) - 1);
fs_descriptor.dpl = 0;
fs_descriptor.segment_present = 1;
fs_descriptor.granularity = 0;
@ -1086,7 +1086,7 @@ UNMAP_AFTER_INIT void Processor::gdt_init()
Descriptor tss_descriptor {};
tss_descriptor.set_base(VirtualAddress { &m_tss });
tss_descriptor.set_limit(sizeof(TSS32));
tss_descriptor.set_limit(sizeof(TSS32) - 1);
tss_descriptor.dpl = 0;
tss_descriptor.segment_present = 1;
tss_descriptor.granularity = 0;