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assada
2024-05-25 23:17:10 +03:00
parent ea8f6b4ce0
commit 3690b91e16
13 changed files with 197 additions and 17 deletions
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10
gdt.c
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@@ -35,7 +35,7 @@ static void tss_install(uint8_t num, uint16_t kernel_ss, uint16_t kernel_esp)
memset(&tss, 0, sizeof(Tss_entry));
tss.ss0 = kernel_ss;
tss.esp0 = kernel_esp;
tss.esp0 = kernel_esp + 0x1000; // SHIT
tss.cs = 0x1B;
tss.ss = 0x23;
@@ -48,10 +48,10 @@ static void tss_install(uint8_t num, uint16_t kernel_ss, uint16_t kernel_esp)
void gdt_install()
{
gdt_set_gate(0, 0x0, 0x0, 0x0, 0x0); // Null segment
gdt_set_gate(1, 0x0, 0xFFFFFFFF, 0x9A, 0xCF); // Kernel code segment
gdt_set_gate(2, 0x0, 0xFFFFFFFF, 0x92, 0xCF); // Data segment
gdt_set_gate(3, 0x0, 0xFFFFFFFF, 0xFA, 0xCF); // User code segment
gdt_set_gate(4, 0x0, 0xFFFFFFFF, 0xF2, 0xCF); // User data segment
gdt_set_gate(1, 0x0, 0xFFFFFFFF, 0x9A, 0xCF); // 0x08 Kernel code segment
gdt_set_gate(2, 0x0, 0xFFFFFFFF, 0x92, 0xCF); // 0x10 Kernel Data segment
gdt_set_gate(3, 0x0, 0xFFFFFFFF, 0xFA, 0xCF); // 0x18 User code segment
gdt_set_gate(4, 0x0, 0xFFFFFFFF, 0xF2, 0xCF); // 0x20 User data segment
tss_install(5, 0x10, stack_top);