Descriptor x86_gdt[1024] = {
{}, // The first entry is reserved for the NULL selector.
- { // 0x08: data
+ { // 0x08: kernel data
limit_low: 0xffff,
base_low: 0,
base_mid: 0,
gran: 1,
base_high: 0
},
- { // 0x10: code
+ { // 0x10: kernel code
limit_low: 0xffff,
base_low: 0,
base_mid: 0,
opsize: 0,
gran: 0,
base_high: 0
- }
+ },
+ { // 0x23: user data
+ limit_low: 0xffff,
+ base_low: 0,
+ base_mid: 0,
+ type: 2, // data segment, writable
+ user: 1,
+ dpl: 3,
+ present: 1,
+ limit_high: 0x7f,
+ sw: 0,
+ reserved: 0,
+ opsize: 1,
+ gran: 1,
+ base_high: 0
+ },
+ { // 0x2b: code
+ limit_low: 0xffff,
+ base_low: 0,
+ base_mid: 0,
+ type: 10, // code segment, readable
+ user: 1,
+ dpl: 3,
+ present: 1,
+ limit_high: 0x7f,
+ sw: 0,
+ reserved: 0,
+ opsize: 1,
+ gran: 1,
+ base_high: 0
+ },
};
struct X86DescriptorTablePointer {
}
extern int x86_diverr, x86_debug, x86_breakpoint;
-extern int x86_gpf, x86_page_fault, x86_invalid_insn, x86_int99_entry;
+extern int x86_gpf, x86_page_fault, x86_invalid_insn;
+extern int x86_int98_entry, x86_int99_entry;
extern void *x86_irqs[256];
namespace Arch {
set_int_gate(6, &x86_invalid_insn);
set_int_gate(13, &x86_gpf);
set_int_gate(14, &x86_page_fault, true);
- set_int_gate(0x99, &x86_int99_entry);
+ set_int_gate(0x98, &x86_int98_entry, false, true);
+ set_int_gate(0x99, &x86_int99_entry, false, true);
for (int i = 0x20; i < 0x30; i++)
set_int_gate(i, x86_irqs[i], true);