lkml.org 
[lkml]   [2015]   [Nov]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: [PATCH v6 13/17] arm64:ilp32: add sys_ilp32.c and a separate table (in entry.S) to use it
Date
On Thursday 12 November 2015 14:47:18 Andreas Schwab wrote:
> Arnd Bergmann <arnd@arndb.de> writes:
>
> > On Thursday 12 November 2015 10:44:55 Andreas Schwab wrote:
> >> Arnd Bergmann <arnd@arndb.de> writes:
> >>
> >> > What do you mean with 32-bit off_t?
> >>
> >> An ABI with 32-bit off_t, ie. all currently implemented 32-bit ABIs.
> >>
> >> > Do you mean that glibc emulates a 32-bit off_t on top of the 64-bit
> >> > __kernel_loff_t?
> >>
> >> Glibc is bridging the user-space ABI to the kernel ABI.
> >
> > Ok, but why?
>
> That's how the ABI is defined right now. I didn't make that up.

Ok, I guess it will remain a mystery then.

Should we perhaps define __ARCH_WANT_SYSCALL_OFF_T for the unistd.h
file then, so we provide both the off_t and the loff_t based syscalls?

That would avoid the extra wrapper in glibc when using a 32-bit
off_t if that is the preferred mode for user space.

Arnd


\
 
 \ /
  Last update: 2015-11-13 17:01    [W:0.090 / U:0.772 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site