RE: [PATCH x86_64]: Setup PER_LINUX32 on x86_64

[Jin, Gordon]

Jin, Gordon <> wrote on Tuesday, November 02, 2004 4:48 PM:

> On x86_64, PER_LINUX32 is not setup but used by syscall personality
> and uname. This patch sets PER_LINUX32 when x86 binary loaded so it
> can be used correctly. 
> - Set personality to PER_LINUX32 when x86 binary loaded.
> - Set personality to PER_LINUX when x86_64 binary loaded.
> - Use sys32_personality instead of sys_personality.
> - Add sys32_newuname() for syscall newuname.
> - Remove the unnecessary check for PER_LINUX32 in sys_uname().
> 
A side question is:
To distinguish 32-bit and native 64-bit app on x86-64(and some other archs),
somewhere PER_LINUX32 is used, while somewhere TIF_IA32 is used.
So both of them need maintained, respectively in task_struct and thread_info.
Is it redundant? Can we do away TIF_IA32?

Thanks,
Gordon
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