diff options
| -rw-r--r-- | sys/arch/amd64/amd64/machdep.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/sys/arch/amd64/amd64/machdep.c b/sys/arch/amd64/amd64/machdep.c index 1a07cb5..5fb006c 100644 --- a/sys/arch/amd64/amd64/machdep.c +++ b/sys/arch/amd64/amd64/machdep.c @@ -127,20 +127,28 @@ static void setup_vectors(struct cpu_info *ci) { union tss_stack scstack; + union tss_stack dfstack; /* Try to allocate a syscall stack */ if (tss_alloc_stack(&scstack, DEFAULT_PAGESIZE) != 0) { panic("failed to allocate syscall stack\n"); } + /* Try to allocate a double fault stack */ + if (tss_alloc_stack(&dfstack, DEFAULT_PAGESIZE) != 0) { + panic("failed to allocate double fault stack\n"); + } + tss_update_ist(ci, scstack, IST_SYSCALL); + tss_update_ist(ci, dfstack, IST_DBFLT); + idt_set_desc(0x0, IDT_TRAP_GATE, ISR(arith_err), 0); idt_set_desc(0x2, IDT_TRAP_GATE, ISR(nmi), 0); idt_set_desc(0x3, IDT_TRAP_GATE, ISR(breakpoint_handler), 0); idt_set_desc(0x4, IDT_TRAP_GATE, ISR(overflow), 0); idt_set_desc(0x5, IDT_TRAP_GATE, ISR(bound_range), 0); idt_set_desc(0x6, IDT_TRAP_GATE, ISR(invl_op), 0); - idt_set_desc(0x8, IDT_TRAP_GATE, ISR(double_fault), 0); + idt_set_desc(0x8, IDT_TRAP_GATE, ISR(double_fault), IST_DBFLT); idt_set_desc(0xA, IDT_TRAP_GATE, ISR(invl_tss), 0); idt_set_desc(0xB, IDT_TRAP_GATE, ISR(segnp), 0); idt_set_desc(0xC, IDT_TRAP_GATE, ISR(ss_fault), 0); |