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Fix MIPS o32 posix_fadvise.

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The posix_fadvise consolidation broke posix_fadvise for MIPS o32, so
resulting in posix/tst-posix_fadvise failing.

MIPS o32 (and the other ABIs) has only the posix_fadvise64 syscall,
which acts like posix_fadvise64_64 (in the o32 case, because of the
alignment argument it's actually a 7-argument syscall).  The generic
posix_fadvise implementation presumes that if __NR_fadvise64 is
defined, it's for the case where a single len argument is passed to
the syscall rather than two syscall arguments in the case of a 32-bit
system.

The generic posix_fadvise64 works fine for this case (defining
__NR_fadvise64_64 to __NR_fadvise64 as needed).  ARM has a
posix_fadvise.c that uses __posix_fadvise64_l64 in posix_fadvise, and
that approach also works for MIPS o32, so this patch makes MIPS o32
include the ARM file.

Tested for MIPS o32.

	* sysdeps/unix/sysv/linux/mips/mips32/posix_fadvise.c: New file.
This commit is contained in:
Joseph Myers 2017-01-12 02:19:00 +00:00
parent 4dfb9c9411
commit c1f0601389
2 changed files with 6 additions and 0 deletions
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ChangeLog
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@ -1,5 +1,7 @@
2017-01-12 Joseph Myers <joseph@codesourcery.com>
* sysdeps/unix/sysv/linux/mips/mips32/posix_fadvise.c: New file.
* math/fgetexcptflg.c (__fegetexceptflag): Store 0 in fexcept_t
object.

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sysdeps/unix/sysv/linux/mips/mips32/posix_fadvise.c Normal file
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/* The o32 MIPS fadvise64 syscall behaves as fadvise64_64. The ARM
implementation of posix_fadvise works correctly for this case; the
generic implementation mishandles it. */
#include <sysdeps/unix/sysv/linux/arm/posix_fadvise.c>