diff options
| -rw-r--r-- | sys/arm64/arm64/exception.S | 21 |
1 files changed, 13 insertions, 8 deletions
diff --git a/sys/arm64/arm64/exception.S b/sys/arm64/arm64/exception.S index efb1364..9568075 100644 --- a/sys/arm64/arm64/exception.S +++ b/sys/arm64/arm64/exception.S @@ -33,6 +33,9 @@ __FBSDID("$FreeBSD$"); .text .macro save_registers el +.if \el == 1 + mov x18, sp +.endif stp x28, x29, [sp, #-16]! stp x26, x27, [sp, #-16]! stp x24, x25, [sp, #-16]! @@ -51,22 +54,20 @@ __FBSDID("$FreeBSD$"); mrs x10, elr_el1 mrs x11, spsr_el1 .if \el == 0 - mrs x12, sp_el0 -.else - mov x12, sp + mrs x18, sp_el0 .endif stp x10, x11, [sp, #-16]! - stp x12, lr, [sp, #-16]! + stp x18, lr, [sp, #-16]! mrs x18, tpidr_el1 .endm .macro restore_registers el - ldp x12, lr, [sp], #16 + msr daifset, #2 /* Disable interrupts, x18 may change + * in the interrupt exception handler */ + ldp x18, lr, [sp], #16 ldp x10, x11, [sp], #16 .if \el == 0 - msr sp_el0, x12 -.else - mov sp, x12 + msr sp_el0, x18 .endif msr spsr_el1, x11 msr elr_el1, x10 @@ -89,6 +90,10 @@ __FBSDID("$FreeBSD$"); ldp x24, x25, [sp], #16 ldp x26, x27, [sp], #16 ldp x28, x29, [sp], #16 +.if \el == 1 + mov sp, x18 + mrs x18, tpidr_el1 +.endif .endm .macro do_ast |
