diff options
| -rw-r--r-- | trapasm.S | 7 |
1 files changed, 5 insertions, 2 deletions
@@ -1,6 +1,9 @@ #include "param.h" #include "x86.h" #include "mmu.h" + +# the offset of cs in trapframe (i.e., tf->cs - tf) +#define CSOFF 144 # vectors.S sends all traps here. .globl alltraps @@ -22,7 +25,7 @@ alltraps: push %rbx push %rax - cmpw $KCSEG, 144(%rsp) # compare to saved cs + cmpw $KCSEG, CSOFF(%rsp) # compare to saved cs jz 1f swapgs @@ -33,7 +36,7 @@ alltraps: .globl trapret trapret: cli - cmpw $KCSEG, 144(%rsp) # compare to saved cs + cmpw $KCSEG, CSOFF(%rsp) # compare to saved cs jz 1f swapgs |