sysdeps/unix/sysv/linux/lseek.c on ILP32 question

[Andreas Schwab]

On Feb 21 2017, Steve Ellcey <sellcey@caviumnetworks.com> wrote:

> I am looking at sysdeps/unix/sysv/linux/lseek.c and the code for when
> __NR__llseek is defined.  It has:
>
> Â  int rc = INLINE_SYSCALL_CALL (_llseek, fd,
> Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â (long) (((uint64_t) (offset)) >> 32),
> Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â (long) offset, &res, whence);
>
> And I am not sure the conversion from offset to the two llseek
> arguments is correct for both LP64 and ILP32 modes when offset is
> negative.

This isn't used for LP64, which won't have _llseek.

Andreas.

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Andreas Schwab, schwab@linux-m68k.org
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