diff options
Diffstat (limited to 'libhurd-mm/ia32-exception-entry.S')
| -rw-r--r-- | libhurd-mm/ia32-exception-entry.S | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/libhurd-mm/ia32-exception-entry.S b/libhurd-mm/ia32-exception-entry.S index 0569098..ba92354 100644 --- a/libhurd-mm/ia32-exception-entry.S +++ b/libhurd-mm/ia32-exception-entry.S @@ -45,6 +45,10 @@ #define EF_STACK_START (5*4) #define EF_NEXT (5*4) +#define ACTIVATED_MODE_BIT 0 +#define PENDING_MESSAGE_BIT 1 +#define INTERRUPT_IN_TRANSITION_BIT 2 + /* Handle an exception. */ .globl exception_handler_entry, _exception_handler_entry exception_handler_entry: @@ -70,7 +74,7 @@ _exception_handler_entry: and $0xfffff000, %edx /* Now check if the interrupt in transition flag is set. */ - bt $0x4, MODE(%edx) + bt $INTERRUPT_IN_TRANSITION_BIT, MODE(%edx) jc after_save /* Nope; we need to save the current EAX, ECX and eflags. */ @@ -148,7 +152,7 @@ after_adjust: /* Check for pending messages. This does not need to be atomic as if we get interrupted here, we automatically transition back to activated mode. */ - bt $0x2, MODE(%edx) + bt $PENDING_MESSAGE_BIT, MODE(%edx) jc process_pending /* Restore the user stack. */ |