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kern: improve single-step around user-exception entry

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Michael Scire 2021-07-27 15:09:36 -07:00 • committed by SciresM
parent c10265676f
commit ebb0bd2b41
2 changed files with 11 additions and 11 deletions
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5
mesosphere/kernel/source/arch/arm64/kern_exception_handlers_asm.s
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@ -217,11 +217,6 @@ _ZN3ams4kern4arch5arm6430EL0SynchronousExceptionHandlerEv:
ldp x21, x22, [sp, #(EXCEPTION_CONTEXT_PC_PSR)]
ldr x23, [sp, #(EXCEPTION_CONTEXT_TPIDR)]
#if defined(MESOSPHERE_ENABLE_HARDWARE_SINGLE_STEP)
/* Since we're returning from an exception, set SPSR.SS so that we advance an instruction if single-stepping. */
orr x22, x22, #(1 << 21)
#endif
msr sp_el0, x20
msr elr_el1, x21
msr spsr_el1, x22