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SubjectRE: [microblaze-uclinux] [PATCH v2] microblaze: nommu: Don't clobber R11 on syscalls
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On Mon, 2009-12-14 at 14:50 -0800, Jim Van Vorst wrote:
> Isn't R11 a temporary? If it doesn't need to be preserved across function
> calls, why can't it be clobbered during a syscall?

Because the Microblaze syscall macros don't include r11 in the clobber
list. I suppose an alternative solution would just change the userspace
macros and not the kernel, even though there is a bug in the kernel.

Michal, is the Microblaze ABI considered "locked down" now, or is a
kernel solution still permitted?

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