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| author | Scott Rifenbark <scott.m.rifenbark@intel.com> | 2015-04-20 07:55:41 -0700 |
|---|---|---|
| committer | Richard Purdie <richard.purdie@linuxfoundation.org> | 2015-04-24 11:07:50 +0100 |
| commit | 4a90b6b0d9aabef42da231ac9181829ba42ad7da (patch) | |
| tree | 18fe4c6319de7caa88d4575728b4bad9e48618ad /documentation | |
| parent | 0c7340105edbfb2d5467e9635de6008d2d28e7e7 (diff) | |
| download | ast2050-yocto-poky-4a90b6b0d9aabef42da231ac9181829ba42ad7da.zip ast2050-yocto-poky-4a90b6b0d9aabef42da231ac9181829ba42ad7da.tar.gz | |
ref-manual: Updates to ELF binary QA warning
Fixes [YOCTO #7630]
Apparently the text relocation being done here can cause runtime
performance issues. I documented a potential work-around for the
issue and provided a cross-reference link to an external site for
more general information about text relocation at runtime.
Reported-by: Laszlo Papp <lpapp@kde.org>
(From yocto-docs rev: f7f611a6668b6cd2ee3928ad44c72dbbe5307c38)
Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Diffstat (limited to 'documentation')
| -rw-r--r-- | documentation/ref-manual/ref-classes.xml | 6 | ||||
| -rw-r--r-- | documentation/ref-manual/ref-qa-checks.xml | 7 |
2 files changed, 7 insertions, 6 deletions
diff --git a/documentation/ref-manual/ref-classes.xml b/documentation/ref-manual/ref-classes.xml index a000b2a..3889473 100644 --- a/documentation/ref-manual/ref-classes.xml +++ b/documentation/ref-manual/ref-classes.xml @@ -1697,7 +1697,11 @@ <listitem><para><emphasis><filename>textrel:</filename></emphasis> Checks for ELF binaries that contain relocations in their <filename>.text</filename> sections, which can result in a - performance impact at runtime.</para></listitem> + performance impact at runtime. + See the explanation for the + <link linkend='qa-issue-textrel'><filename>ELF binary</filename></link> + message for more information regarding runtime performance issues. + </para></listitem> <listitem><para><emphasis><filename>unsafe-references-in-binaries:</filename></emphasis> Reports when a binary installed in <filename>${base_libdir}</filename>, diff --git a/documentation/ref-manual/ref-qa-checks.xml b/documentation/ref-manual/ref-qa-checks.xml index 54cd433..7eaeb7f 100644 --- a/documentation/ref-manual/ref-qa-checks.xml +++ b/documentation/ref-manual/ref-qa-checks.xml @@ -467,8 +467,8 @@ can be found then it should be implemented. I can't find one at the moment. </para> <para> - Typically, the way to solve this performance issue is to - add "-fPIC" to the compiler command-line options. + Typically, the way to solve this performance issue is + to add "-fPIC" to the compiler command-line options. For example, given software that reads <link linkend='var-CFLAGS'><filename>CFLAGS</filename></link> when you build it, you can add the following to your @@ -476,9 +476,6 @@ can be found then it should be implemented. I can't find one at the moment. <literallayout class='monospaced'> CFLAGS_append = " -fPIC " </literallayout> - </para> - - <para> For more information on text relocations at runtime, see <ulink url='http://www.akkadia.org/drepper/textrelocs.html'></ulink>. </para> |
