| 585,15 → 585,28 |
|---|
| cmp %g3, 1 |
| be 1f |
| nop |
| 0: ba 0b ! this for debugging, if we ever get here |
| 0: ba 0b ! this is for debugging, if we ever get here |
| nop ! it will be easy to find |
| |
| 1: |
| .if NOT(\is_syscall) |
| rdpr %tstate, %g3 |
| |
| /* |
| * One of the ways this handler can be invoked is after a nested MMU trap from |
| * either spill_1_normal or fill_1_normal traps. Both of these traps manipulate |
| * the CWP register. We deal with the situation by simulating the MMU trap |
| * on TL=1 and restart the respective SAVE or RESTORE instruction once the MMU |
| * trap is resolved. However, because we are in the wrong window from the |
| * perspective of the MMU trap, we need to synchronize CWP with CWP from TL=0. |
| */ |
| and %g3, TSTATE_CWP_MASK, %g4 |
| wrpr %g4, 0, %cwp ! resynchronize CWP |
| |
| andcc %g3, TSTATE_PRIV_BIT, %g0 ! if this trap came from the privileged mode... |
| bnz 0f ! ...skip setting of kernel stack and primary context |
| nop |
| |
| .endif |
| /* |
| * Normal window spills will go to the userspace window buffer. |
| 885,7 → 898,7 |
|---|
| * CANSAVE = 0 |
| * OTHERWIN = 0 |
| * |
| * The RESTORE isntruction is therfore to be skipped. |
| * The RESTORE instruction is therfore to be skipped. |
| */ |
| 2: |
| wrpr %g0, 0, %otherwin |