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>
yann@2437
     1
ripped from Debian
yann@2437
     2
yann@2437
     3
 sysdeps/unix/sysv/linux/posix_fadvise.c |   13 +++++++++++++
yann@2437
     4
 1 file changed, 13 insertions(+)
yann@2437
     5
yann@2437
     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
yann@2437
     7
--- glibc-2.12.1.orig/sysdeps/unix/sysv/linux/posix_fadvise.c	2003-08-17 02:36:22.000000000 +0200
yann@2437
     8
+++ glibc-2.12.1/sysdeps/unix/sysv/linux/posix_fadvise.c	2009-11-13 00:50:03.000000000 +0100
yann@2437
     9
@@ -35,6 +35,19 @@
yann@2437
    10
     return INTERNAL_SYSCALL_ERRNO (ret, err);
yann@2437
    11
   return 0;
yann@2437
    12
 #else
yann@2437
    13
+# ifdef __NR_fadvise64_64
yann@2437
    14
+  INTERNAL_SYSCALL_DECL (err);  
yann@2437
    15
+  int ret = INTERNAL_SYSCALL (fadvise64_64, err, 6, fd,
yann@2437
    16
+			      __LONG_LONG_PAIR ((long) (offset >> 31),
yann@2437
    17
+						(long) offset),
yann@2437
    18
+			      __LONG_LONG_PAIR ((long) (len >> 31),
yann@2437
    19
+						(long) len),
yann@2437
    20
+			      advise);
yann@2437
    21
+  if (INTERNAL_SYSCALL_ERROR_P (ret, err))
yann@2437
    22
+    return INTERNAL_SYSCALL_ERRNO (ret, err);
yann@2437
    23
+  return 0;
yann@2437
    24
+# else
yann@2437
    25
   return ENOSYS;
yann@2437
    26
+# endif
yann@2437
    27
 #endif
yann@2437
    28
 }