diff options
Diffstat (limited to 'x86_64/locore.S')
| -rw-r--r-- | x86_64/locore.S | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/x86_64/locore.S b/x86_64/locore.S index 2938e430..16b0dde5 100644 --- a/x86_64/locore.S +++ b/x86_64/locore.S @@ -345,6 +345,21 @@ ENTRY(start_timer) * */ +/* Try to save/show some information when a double fault happens + * We can't recover to a working state, so if we have a debugger wait for it, + * otherwise reset */ +ENTRY(t_dbl_fault) + INT_FIX + cli /* disable interrupts that might corrupt the state*/ + pusha + movq %cr2,%rax + movq %rax,R_CR2-R_R15(%rsp) /* CR2 might contain the faulting address */ + subq $48,%rsp // FIXME remove when segments are cleaned up + movq %rsp,%rdi /* pass the saved state */ + call handle_double_fault + jmp cpu_shutdown /* reset */ +END(t_dbl_fault) + /* * General protection or segment-not-present fault. * Check for a GP/NP fault in the kernel_return |