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Kernel: Refactor TSS loading to make it cleaner >.<

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This commit is contained in:
apio 2022-10-12 13:07:28 +02:00
parent 97eacc027e
commit c1f9d3323f
1 changed files with 16 additions and 6 deletions
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22
kernel/src/gdt/GDT.cpp
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@ -78,11 +78,8 @@ static void set_limit(GDTEntry* entry, uint32_t limit)
entry->limit1_flags = (entry->limit1_flags & 0xF0) | ((limit >> 16) & 0xF);
}
void GDT::load()
static void setup_tss()
{
static GDTR gdtr;
gdtr.offset = (uint64_t)&internal_gdt;
gdtr.size = sizeof(InternalGDT);
memset(&main_tss, 0, sizeof(TSS));
main_tss.rsp[0] =
(uint64_t)MemoryManager::get_pages(4) + (PAGE_SIZE * 4) - 8; // allocate 16KB for the syscall stack
@ -90,8 +87,21 @@ void GDT::load()
set_base(&internal_gdt.tss, (uint64_t)&main_tss & 0xffffffff);
internal_gdt.tss2.base_high = (uint32_t)(((uint64_t)&main_tss >> 32) & 0xffffffff);
set_limit(&internal_gdt.tss, sizeof(TSS) - 1);
kdbgln("Loading GDT at offset %lx, size %d", gdtr.offset, gdtr.size);
load_gdt(&gdtr);
}
static void load_tss()
{
kdbgln("Loading TR (GDT entry 0x2b)");
load_tr(0x2b);
}
void GDT::load()
{
static GDTR gdtr;
gdtr.offset = (uint64_t)&internal_gdt;
gdtr.size = sizeof(InternalGDT);
setup_tss();
kdbgln("Loading GDT at offset %lx, size %d", gdtr.offset, gdtr.size);
load_gdt(&gdtr);
load_tss();
}