On Mon, 8 Sep 2014, Daniel Thompson wrote:
> +@
> +@ Taking a FIQ in abort mode is similar to taking a FIQ in SVC mode
> +@ and reuses the same macros. However in abort mode we must also
> +@ save/restore lr_abt and spsr_abt to make nested aborts safe.
> +@
> + .align 5
> +__fiq_abt:
> + svc_entry 0, 0
> +
> + ARM( msr cpsr_c, #ABT_MODE | PSR_I_BIT | PSR_F_BIT )
> + THUMB( mov r0, #ABT_MODE | PSR_I_BIT | PSR_F_BIT )
> + THUMB( msr cpsr_c, r0 )
> + mov r1, lr @ Save lr_abt
> + mrs r2, spsr @ Save spsr_abt, abort is now safe
> + ARM( msr cpsr_c, #SVC_MODE | PSR_I_BIT | PSR_F_BIT )
> + THUMB( mov r0, #SVC_MODE | PSR_I_BIT | PSR_F_BIT )
> + THUMB( msr cpsr_c, r0 )
> + push {r1 - r2}
stmfd sp!, {r1 - r2}
> +
> + sub r0, sp, #8 @ struct pt_regs *regs
> + bl handle_fiq_as_nmi
> +
> + pop {r1 - r2}
ldmfd sp!, {r1 - r2}
... so that old binutils we still accept to compile the kernel (in ARM
mode) are happy.
Otherwise...
Acked-by: Nicolas Pitre <n...@linaro.org>
Nicolas
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