Date: Sat, 20 Mar 2010 16:39:28 +0000 (UTC) From: Hiroki Sato <hrs@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-releng@freebsd.org Subject: svn commit: r205387 - releng/7.3/release/doc/en_US.ISO8859-1/relnotes Message-ID: <201003201639.o2KGdSp8029270@svn.freebsd.org>
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Author: hrs Date: Sat Mar 20 16:39:28 2010 New Revision: 205387 URL: http://svn.freebsd.org/changeset/base/205387 Log: Update release notes: merge two SysV IPC entries into one, rtld(1) entries revised: - dynamic string token subst - PIE support improvement - ELF object mapping change Suggested by: kib Approved by: re (implicitly) Modified: releng/7.3/release/doc/en_US.ISO8859-1/relnotes/article.sgml Modified: releng/7.3/release/doc/en_US.ISO8859-1/relnotes/article.sgml ============================================================================== --- releng/7.3/release/doc/en_US.ISO8859-1/relnotes/article.sgml Sat Mar 20 16:34:51 2010 (r205386) +++ releng/7.3/release/doc/en_US.ISO8859-1/relnotes/article.sgml Sat Mar 20 16:39:28 2010 (r205387) @@ -275,17 +275,14 @@ fixed. For more details, see <ulink url="http://security.freebsd.org/advisories/FreeBSD-EN-10:02.sched_ule.asc">EN-10:02.sched_ule</ulink>.</para>; - <para>&os; now supports shared memory segments for System V IPC - which is larger than 2GB on 64-bit platforms. For more - details, see <filename>/usr/src/UPDATING</filename> - file.</para> - <para>The &man.sglist.9; API to manage scatter/gather lists of physical addresses has been added.</para> <para>&os; ABI of some of the structures used by the System V - IPC API has been changed internally. For new kernel modules, - the <function>kern_msgctl()</function>, + IPC API has been changed internally, and it now supports + shared memory segments for System V IPC which is larger than + 2GB on 64-bit platforms. For new kernel modules, the + <function>kern_msgctl()</function>, <function>kern_semctl()</function>, and <function>kern_shmctl()</function> functions will be transparently renamed to the new @@ -850,13 +847,54 @@ database. The &man.su.1; utility fails for the long names.</para> - <para>The &os; runtime linker, &man.rtld.1; now supports a new - environment variable <varname>LD_ELF_HINTS_PATH</varname> for - overriding the rtld hints file. This feature gives a - convenient way of using a custom set of shared library that is - not located in the default location and switch back. This - environment variable is automatically unset if the process is - tainted with setuid/setgid.</para> + <para>The &os; runtime linker, &man.rtld.1; has been improved. + The changes include:</para> + + <itemizedlist> + <listitem> + <para>The dynamic string token substitution in the + <literal>rpath</literal> and <literal>soname</literal> has + been implemented. This can be enabled by setting + <option>-z <replaceable>origin</replaceable></option> + option of &man.ld.1;. Currently, it recognizes + <varname>$OSNAME</varname>, <varname>$PLATFORM</varname>, + <varname>$OSREL</varname>, and + <varname>$ORIGIN</varname> tokens. This translation is + unconditionally disabled for setuid/setgid + processes.</para> + </listitem> + + <listitem> + <para>PIE (Position Independent Executables) support has + been improved. The runtime linker now calculates + relocation base for the main object, and applies the + relocation adjustment for all virtual addresses encoded + into the ELF structures of it in order to make it possible + to load PIE binaries at a non-zero base address.</para> + </listitem> + + <listitem> + <para>The way the mapping of the ELF objects has been + changed to make wiring of the address space possible. It + now maps <literal>PROT_NONE</literal> anonymous memory + over the whole range first, and then mapping the segments + of the object over it. It allocates + <literal>.bss</literal> by changing the protection of the + range instead of remapping, and unnecessary clearing of + the text segment when its end is not page-aligned has been + eliminated.</para> + </listitem> + + <listitem> + <para>A new environment variable + <varname>LD_ELF_HINTS_PATH</varname> for overriding the + rtld hints file has been supported. This feature gives a + convenient way of using a custom set of shared library + that is not located in the default location and switch + back. This environment variable is automatically unset if + the process is tainted with setuid/setgid.</para> + </listitem> + </itemizedlist> <para>The &man.strptime.3; function now supports <literal>%z</literal> format specifier.</para>
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