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Re: Linux emulation
Matt Thomas wrote:
>On Apr 3, 2014, at 2:30 PM, Dennis Ferguson
>> I think it can be enabled unconditionally. I think the ABI the
>> kernel was compiled for doesn't matter, it is the ABI the Linux
>> binary was compiled for which causes things to change. The executive
>> decision would be whether the emulation code should run with Linux
>> binaries of either ABI or whether just picking one ABI is sufficient.
>Almost right. non-EABI has a maximal alignment of 4 (long long have
>an alignment of 4) while on EABI has a maximal alignment of 8. This
>causes structures to have different layouts which is why there is
>COMPAT_NETBSD32 support (for the other alignment).
With the Linux EABI, a syscall with arguments of (32, 64, 32) will
put them in (r1, r3&r4, r5).
I think that I can do something similar to mips to detect any syscalls
with 64 bit arguments.
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