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patches/glibc/ports-2.12.1/200-fadvise64_64.patch
author "Yann E. MORIN" <yann.morin.1998@free.fr>
Sat Jan 04 01:02:57 2014 +0100 (2014-01-04)
changeset 3271 c65dc9b98841
permissions -rw-r--r--
cc/gcc: diable libsanitizer without NPTL

gcc-4.8 comes with a new library to sanitise memory access:
- heap-, stack-, and global-buffer overflow, use-after-free
- data-races between threads

This library requires some _np parts of the API, which are not
implemented in the (old) LinuxThreads, which is still available
in uClibc.

Since NPTL requires a i486 or above, i386 are stuck with using LT,
which precludes building the libsanitizer.

Disable libsanitizer, a bit like libatomic is.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Niels Penneman <niels@penneman.org> 
     1 ripped from Debian

     2 

     3  sysdeps/unix/sysv/linux/posix_fadvise.c |   13 +++++++++++++

     4  1 file changed, 13 insertions(+)

     5 

     6 diff -durN glibc-2.12.1.orig/sysdeps/unix/sysv/linux/posix_fadvise.c glibc-2.12.1/sysdeps/unix/sysv/linux/posix_fadvise.c

     7 --- glibc-2.12.1.orig/sysdeps/unix/sysv/linux/posix_fadvise.c	2003-08-17 02:36:22.000000000 +0200

     8 +++ glibc-2.12.1/sysdeps/unix/sysv/linux/posix_fadvise.c	2009-11-13 00:50:03.000000000 +0100

     9 @@ -35,6 +35,19 @@

    10      return INTERNAL_SYSCALL_ERRNO (ret, err);

    11    return 0;

    12  #else

    13 +# ifdef __NR_fadvise64_64

    14 +  INTERNAL_SYSCALL_DECL (err);  

    15 +  int ret = INTERNAL_SYSCALL (fadvise64_64, err, 6, fd,

    16 +			      __LONG_LONG_PAIR ((long) (offset >> 31),

    17 +						(long) offset),

    18 +			      __LONG_LONG_PAIR ((long) (len >> 31),

    19 +						(long) len),

    20 +			      advise);

    21 +  if (INTERNAL_SYSCALL_ERROR_P (ret, err))

    22 +    return INTERNAL_SYSCALL_ERRNO (ret, err);

    23 +  return 0;

    24 +# else

    25    return ENOSYS;

    26 +# endif

    27  #endif

    28  }
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