Re: [Xen-devel] Xen on ARM basic questions

[Vaibhav Bedia <vaibhav.bedia@xxxxxxxxx>]

On Mon, Dec 2, 2013 at 9:17 AM, Ian Campbell <Ian.Campbell@xxxxxxxxxx> wrote:
> On Mon, 2013-12-02 at 09:13 -0500, Vaibhav Bedia wrote:
>>
>> addr2line points me to irq_restore so that's definitely interesting.
>>
>> vaibhav@vaibhav-VirtualBox:~/src/linux$ arm-linux-gnueabi-addr2line -f
>> -e vmlinux c0097518
>> arch_local_irq_restore
>> /home/vaibhav/src/linux/arch/arm/include/asm/irqflags.h:152
>
> Assuming your file has the same content as mine that would point to
> arch_local_irq_restore, which is, erm, interesting...
>
> I'm not sure what to make of that, if reenabling interrupts were a
> problem I'd expect the PC to be pointing to some interrupt handler not
> at the instructing which enabled them.
>
> Does your version of the file line up with mine? IOW what do you have at
> line 152?
>

Yes, that's the same for me.

/*
 * restore saved IRQ & FIQ state
 */
static inline void arch_local_irq_restore(unsigned long flags)
{
        asm volatile(
                "       msr     " IRQMASK_REG_NAME_W ", %0      @
local_irq_restore"
                :
                : "r" (flags)
                : "memory", "cc");
}

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