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small gdt fix

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This commit is contained in:
Nathan Singer
2025-05-29 10:23:06 -04:00
parent afcf0bea09
commit bdd20608fa
1 changed files with 19 additions and 10 deletions
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29
kernel/kmain.c
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@ -5,19 +5,28 @@
#include <kernel/serial.h>
#include <kernel/x86/gdt.h>
uint64_t gdt[5];
#define GDT_SIZE 5
uint64_t gdt[GDT_SIZE];
void gdt_init(void)
{
gdt[0] = create_descriptor(0, 0, 0); // null
gdt[1] = create_descriptor(0, 0x000FFFFF, (GDT_CODE_PL0)); // kernel code
gdt[2] = create_descriptor(0, 0x000FFFFF, (GDT_DATA_PL0)); // kernel data
gdt[3] = create_descriptor(0, 0x000FFFFF, (GDT_CODE_PL3)); // user code
gdt[4] = create_descriptor(0, 0x000FFFFF, (GDT_DATA_PL3)); // user data
setGdt((sizeof(uint64_t) * GDT_SIZE) - 1, &(gdt[0])); // limit, base
reloadSegments();
}
#undef GDT_SIZE
void kmain(void)
{
gdt[0] = create_descriptor(0, 0, 0); // null
gdt[1] = create_descriptor(0, 0x000FFFFF, (GDT_CODE_PL0));
gdt[2] = create_descriptor(0, 0x000FFFFF, (GDT_DATA_PL0));
gdt[3] = create_descriptor(0, 0x000FFFFF, (GDT_CODE_PL3));
gdt[4] = create_descriptor(0, 0x000FFFFF, (GDT_DATA_PL3));
setGdt((sizeof(uint64_t) * 5) - 1, &(gdt[0]));
reloadSegments();
gdt_init();
terminal_initialize();
serial_initialize();