diff options
| author | Jeremy Fitzhardinge <jeremy@goop.org> | 2008-07-08 15:07:09 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-07-16 11:04:41 +0200 |
| commit | 4a5c3e77f70b3ea8b361d7fa9eb2e4dad18f70ae (patch) | |
| tree | 8dd0085bb4dc6eeceb5a6dd070b9a05890d2d756 | |
| parent | 0775b3dbcb6d17b531b36df520ddab735647f3f7 (diff) | |
xen64: implement failsafe callback
Implement the failsafe callback, so that iret and segment register
load exceptions are reported to the kernel.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | arch/x86/kernel/entry_64.S | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S index 7cc2de79614..6aa6932e21b 100644 --- a/arch/x86/kernel/entry_64.S +++ b/arch/x86/kernel/entry_64.S @@ -1365,10 +1365,8 @@ END(do_hypervisor_callback) # with its current contents: any discrepancy means we in category 1. */ ENTRY(xen_failsafe_callback) -#if 1 - ud2a -#else - _frame (RIP-0x30) + framesz = (RIP-0x30) /* workaround buggy gas */ + _frame framesz CFI_REL_OFFSET rcx, 0 CFI_REL_OFFSET r11, 8 movw %ds,%cx @@ -1391,8 +1389,13 @@ ENTRY(xen_failsafe_callback) CFI_RESTORE r11 addq $0x30,%rsp CFI_ADJUST_CFA_OFFSET -0x30 - movq $11,%rdi /* SIGSEGV */ - jmp do_exit + pushq $0 + CFI_ADJUST_CFA_OFFSET 8 + pushq %r11 + CFI_ADJUST_CFA_OFFSET 8 + pushq %rcx + CFI_ADJUST_CFA_OFFSET 8 + jmp general_protection CFI_RESTORE_STATE 1: /* Segment mismatch => Category 1 (Bad segment). Retry the IRET. */ movq (%rsp),%rcx @@ -1406,7 +1409,6 @@ ENTRY(xen_failsafe_callback) SAVE_ALL jmp error_exit CFI_ENDPROC -#endif END(xen_failsafe_callback) #endif /* CONFIG_XEN */ |