Re: Process virtual address space
Re: Process virtual address space
- Subject: Re: Process virtual address space
- From: Prokash Sinha <email@hidden>
- Date: Thu, 29 Oct 2015 08:36:41 -0700
Thanks Shantonu,
That’s a great insight !
-Prokash
On Oct 28, 2015, at 8:34 PM, Shantonu Sen <email@hidden> wrote:
> Yes, it's shared unless you set the -no_shared_cr3 boot arg
>
> 32-bit Mach-O doesn't change that. The kernel maintains page tables for processes regardless of whether they are 32-bit or 64-bit, but 32-bit processes only use 0-4GB of the address space.
>
> Shantonu
>
>> On Oct 28, 2015, at 6:40 PM, Prokash Sinha <email@hidden> wrote:
>>
>> Folks,
>>
>> I just saw in osx internal book ( by Levin), that in 64bit indeed the kernel space is shared mapped, like Windows and Linux.
>>
>> So that was the confusion.
>>
>> Correct me if I’m wrong, please.
>>
>> What would happen if the process is 32 Mach-O ? Would there be some thunk layer, that would make it as if the process virtual address space is shared.
>>
>> Thanks,
>> Prokash
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