[bug#43591] [PATCH core-updates] gnu: glibc-final: Catch all cases of a glibc user not requesting 64-bit offsets and then using readdir.

[Danny Milosavljevic]

On Sat, 26 Sep 2020 03:42:44 +0200
Danny Milosavljevic <dannym@scratchpost.org> wrote:

> Hi,
> 
> by now I also tested it on overdrive1, an aarch64 machine.
> 
> > I do not have access to a real aarch64 machine--so no idea how it is there.
> > That would be the most interesting case, because those don't have X86_32,
> > so ILP32 is either not present or implemented differently.  
> 
> I added it in the table below under "a64armhf".
> 
> ILP32 is not present on aarch64.
> 
> Test result of [1] updated:
> 
> system   _FILE_OFFSET_BITS off_t   d_off-sizeof   d_off-values
> ---------------------------------------------------------------
> x86_64   -                 8 Byte  8 Byte         8 Byte
> i686     -                 4 Byte  4 Byte         4 Byte
> i686     64                8 Byte  8 Byte         4 Byte
> i686     32                4 Byte  4 Byte         4 Byte
> i686     7                 4 Byte  4 Byte         4 Byte
> armhf    -                 4 Byte  4 Byte         4 Byte
> armhf    64                8 Byte  8 Byte         4 Byte
> armhf    32                4 Byte  4 Byte         4 Byte
> armhf    7                 4 Byte  4 Byte         4 Byte
> a64armhf -                 4 Byte  4 Byte         FAIL
> a64armhf 64                8 Byte  8 Byte         8 Byte
> a64armhf 32                4 Byte  4 Byte         FAIL
> a64armhf 7                 4 Byte  4 Byte         FAIL

aarch64    -                 8 Byte  8 Byte         8 Byte

> For a64armhf, the version with -D_FILE_OFFSET_BITS=64 is the only one where
> readdir succeeds on my specially-prepared directory.

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