svn commit: r48059 - head/en_US.ISO8859-1/htdocs/news/status
Benjamin Kaduk <[email protected]>
| Newsgroups | gmane.os.freebsd.devel.cvs.doc |
|---|---|
| Message-ID | <[email protected]> |
Author: bjk
Date: Mon Jan 18 22:48:15 2016
New Revision: 48059
URL: https://svnweb.freebsd.org/changeset/doc/48059
Log:
Add armv6 hardfloat entry from imp
Modified:
head/en_US.ISO8859-1/htdocs/news/status/report-2015-10-2015-12.xml
Modified: head/en_US.ISO8859-1/htdocs/news/status/report-2015-10-2015-12.xml
==============================================================================
--- head/en_US.ISO8859-1/htdocs/news/status/report-2015-10-2015-12.xml Mon Jan 18 22:35:01 2016 (r48058)
+++ head/en_US.ISO8859-1/htdocs/news/status/report-2015-10-2015-12.xml Mon Jan 18 22:48:15 2016 (r48059)
@@ -3937,4 +3937,71 @@
</task>
</help>
</project>
+
+ <project cat='arch'>
+ <title>armv6 Hard Float Default ABI</title>
+
+ <contact>
+ <person>
+ <name>
+ <given>Warner</given>
+ <common>Losh</common>
+ </name>
+ <email>[email protected]</email>
+ </person>
+ </contact>
+
+ <links>
+ <url href="http://bsdimp.blogspot.com/2015/12/hard-float-api-coming-soon-by-default.html">Blog Entry</url>
+ </links>
+
+ <body>
+ <p>Work on moving armv6 from a "soft float" ABI (but
+ still using hardware floating point) to a fully "hardware
+ float" API moves forward. The ability to have both soft and
+ hard ABI libraries on the same system is now functional. All
+ armv6 and armv7 systems we support have hardware floating point
+ capabilities. We currently use the floating-point hardware, but
+ with a slightly un-optimal ABI, for compatibility with older
+ versions of &os;. The ABI differences are only at the userspace
+ level — the kernel does not care what floating-point ABI is
+ used, and both types of binaries can run at the same time.</p>
+
+ <p>The run-time linker now knows if a binary uses the hardware
+ float ABI or the software float ABI by examining some fields in
+ the ELF header. The linker uses different paths and config files
+ for hard vs. soft binaries. The <tt>rc</tt> system has been
+ enhanced to load the software float paths. <tt>ldconfig</tt> now
+ understands soft libraries in much the same way that it
+ understands 32-bit libraries on 64-bit systems. No additional
+ kernel support was necessary for this, apart from a minor patch to
+ pass the ELF header information to the binary, which has been in
+ the tree since last summer.</p>
+
+ <p>The experimental armv6hf <tt>MACHINE_ARCH</tt> will be
+ retired after a transition period. It will cease to mean anything
+ different from armv6 after the build system changes go in.
+ Support for building soft-float ABI libraries will remain in the
+ tree, to support the <tt>WITH_LIBSOFT</tt> build option.</p>
+ </body>
+
+ <help>
+ <task>
+ <p>Complete documentation needs to be written.</p>
+ </task>
+
+ <task>
+ <p>Hooks into the &os; build system to generate soft float and
+ transition to hard float after a flag day need to be polished
+ up and committed.</p>
+ </task>
+
+ <task>
+ <p>A number of different upgrade/coexistence scenarios need
+ to be tested, and a full package run needs to be done to assess
+ the latest state of the ports tree. This work should be completed
+ by the end of January.</p>
+ </task>
+ </help>
+ </project>
</report>
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