x86: Remove arch-specific low level lock implementation

[thirdparty/glibc.git] / NEWS

diff --git a/NEWS b/NEWS
index 912a9bdc0f5430da5340456a9abd08d1f043893e..7f5ef432fa259267e55a6303093949e6d369cddd 100644 (file)
--- a/NEWS
+++ b/NEWS
@@ -4,6 +4,82 @@ See the end for copying conditions.
 
 Please send GNU C library bug reports via <https://sourceware.org/bugzilla/>
 using `glibc' in the "product" field.
+\f
+Version 2.30
+
+Major new features:
+
+* Unicode 12.1.0 Support: Character encoding, character type info, and
+  transliteration tables are all updated to Unicode 12.1.0, using
+  generator scripts contributed by Mike FABIAN (Red Hat).
+
+* The dynamic linker accepts the --preload argument to preload shared
+  objects, in addition to the LD_PRELOAD environment variable.
+
+* The twalk_r function has been added.  It is similar to the existing
+  twalk function, but it passes an additional caller-supplied argument
+  to the callback function.
+
+* On Linux, the gettid function has been added.
+
+* Minguo (Republic of China) calendar support has been added as an
+  alternative calendar for the following locales: zh_TW, cmn_TW, hak_TW,
+  nan_TW, lzh_TW.
+
+* The entry for the new Japanese era has been added for ja_JP locale.
+
+* Memory allocation functions malloc, calloc, realloc, reallocarray, valloc,
+  pvalloc, memalign, and posix_memalign fail now with total object size
+  larger than PTRDIFF_MAX.  This is to avoid potential undefined behavior with
+  pointer subtraction within the allocated object, where results might
+  overflow the ptrdiff_t type.
+
+Deprecated and removed features, and other changes affecting compatibility:
+
+* The functions clock_gettime, clock_getres, clock_settime,
+  clock_getcpuclockid, clock_nanosleep were removed from the librt library
+  for new applications (on architectures which had them).  Instead, the
+  definitions in libc will be used automatically, which have been available
+  since glibc 2.17.
+
+* The obsolete and never-implemented XSI STREAMS header files <stropts.h>
+  and <sys/stropts.h> have been removed.
+
+* Support for the "inet6" option in /etc/resolv.conf and the RES_USE_INET6
+  resolver flag (deprecated in glibc 2.25) have been removed.
+
+* The obsolete RES_INSECURE1 and RES_INSECURE2 option flags for the DNS stub
+  resolver have been removed from <resolv.h>.
+
+* With --enable-bind-now, installed programs are now linked with the
+  BIND_NOW flag.
+
+Changes to build and runtime requirements:
+
+* GCC 6.2 or later is required to build the GNU C Library.
+
+  Older GCC versions and non-GNU compilers are still supported when
+  compiling programs that use the GNU C Library.
+
+Security related changes:
+
+  CVE-2019-7309: x86-64 memcmp used signed Jcc instructions to check
+  size.  For x86-64, memcmp on an object size larger than SSIZE_MAX
+  has undefined behavior.  On x32, the size_t argument may be passed
+  in the lower 32 bits of the 64-bit RDX register with non-zero upper
+  32 bits.  When it happened with the sign bit of RDX register set,
+  memcmp gave the wrong result since it treated the size argument as
+  zero.  Reported by H.J. Lu.
+
+  CVE-2019-9169: Attempted case-insensitive regular-expression match
+  via proceed_next_node in posix/regexec.c leads to heap-based buffer
+  over-read.  Reported by Hongxu Chen.
+
+The following bugs are resolved with this release:
+
+  [The release manager will add the list generated by
+  scripts/list-fixed-bugs.py just before the release.]
+
 \f
 Version 2.29