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Differential D31477 Diff 93480 sys/arm64/arm64/exception.S

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sys/arm64/arm64/exception.S

Show First 20 Lines • Show All 72 Lines • ▼ Show 20 Lines.if \el == 0
blr x1 blr x1
1: 1:
ldr x0, [x18, #PC_CURTHREAD] ldr x0, [x18, #PC_CURTHREAD]
bl ptrauth_exit_el0 bl ptrauth_exit_el0
ldr x0, [x18, #(PC_CURTHREAD)] ldr x0, [x18, #(PC_CURTHREAD)]
bl dbg_monitor_enter bl dbg_monitor_enter
msr daifclr, #DAIF_D /* Enable the debug exception */
.endif /* Unmask debug and SError exceptions */
msr daifclr, #(DAIF_D | DAIF_A)
.else
/* /*
* Unmask debug and SError exceptions.
* For EL1, debug exceptions are conditionally unmasked in * For EL1, debug exceptions are conditionally unmasked in
* do_el1h_sync(). * do_el1h_sync().
*/ */
msr daifclr, #(DAIF_A)
.endif
mhorneUnsubmitted
Not Done
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Can an SError interrupt be taken from EL1? If so, I think you need to unmask DAIF_A here or in do_el1h_sync().

mhorne: Can an SError interrupt be taken from EL1? If so, I think you need to unmask DAIF_A here or in…
.endm .endm
.macro restore_registers el .macro restore_registers el
.if \el == 1
/* /*
* Disable interrupts and debug exceptions, x18 may change in the * Mask all exceptions, x18 may change in the interrupt exception
* interrupt exception handler. For EL0 exceptions, do_ast already * handler.
* did this.
*/ */
msr daifset, #(DAIF_D | DAIF_INTR) msr daifset, #(DAIF_ALL)
.endif
.if \el == 0 .if \el == 0
ldr x0, [x18, #PC_CURTHREAD] ldr x0, [x18, #PC_CURTHREAD]
mov x1, sp mov x1, sp
bl dbg_monitor_exit bl dbg_monitor_exit
ldr x0, [x18, #PC_CURTHREAD] ldr x0, [x18, #PC_CURTHREAD]
bl ptrauth_enter_el0 bl ptrauth_enter_el0
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.endif .endif
.endm .endm
.macro do_ast .macro do_ast
mrs x19, daif mrs x19, daif
/* Make sure the IRQs are enabled before calling ast() */ /* Make sure the IRQs are enabled before calling ast() */
bic x19, x19, #PSR_I bic x19, x19, #PSR_I
1: 1:
/* Disable interrupts */ /*
msr daifset, #(DAIF_D | DAIF_INTR) * Mask interrupts while checking the ast pending flag
*/
msr daifset, #(DAIF_INTR)
/* Read the current thread flags */ /* Read the current thread flags */
ldr x1, [x18, #PC_CURTHREAD] /* Load curthread */ ldr x1, [x18, #PC_CURTHREAD] /* Load curthread */
ldr x2, [x1, #TD_FLAGS] ldr x2, [x1, #TD_FLAGS]
/* Check if we have either bits set */ /* Check if we have either bits set */
mov x3, #((TDF_ASTPENDING|TDF_NEEDRESCHED) >> 8) mov x3, #((TDF_ASTPENDING|TDF_NEEDRESCHED) >> 8)
lsl x3, x3, #8 lsl x3, x3, #8
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