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<title>Contributors - Debugging with GDB</title>
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<link rel="up" href="Summary.html#Summary" title="Summary">
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<div class="node">
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<a name="Contributors"></a>
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<p>
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Previous: <a rel="previous" accesskey="p" href="Free-Documentation.html#Free-Documentation">Free Documentation</a>,
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Up: <a rel="up" accesskey="u" href="Summary.html#Summary">Summary</a>
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<hr>
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</div>
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<h3 class="unnumberedsec">Contributors to <span class="sc">gdb</span></h3>
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<p>Richard Stallman was the original author of <span class="sc">gdb</span>, and of many
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other <span class="sc">gnu</span> programs. Many others have contributed to its
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development. This section attempts to credit major contributors. One
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of the virtues of free software is that everyone is free to contribute
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to it; with regret, we cannot actually acknowledge everyone here. The
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file <samp><span class="file">ChangeLog</span></samp> in the <span class="sc">gdb</span> distribution approximates a
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blow-by-blow account.
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<p>Changes much prior to version 2.0 are lost in the mists of time.
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<blockquote>
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<em>Plea:</em> Additions to this section are particularly welcome. If you
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or your friends (or enemies, to be evenhanded) have been unfairly
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omitted from this list, we would like to add your names!
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</blockquote>
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<p>So that they may not regard their many labors as thankless, we
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particularly thank those who shepherded <span class="sc">gdb</span> through major
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releases:
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Andrew Cagney (releases 6.3, 6.2, 6.1, 6.0, 5.3, 5.2, 5.1 and 5.0);
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Jim Blandy (release 4.18);
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Jason Molenda (release 4.17);
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Stan Shebs (release 4.14);
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Fred Fish (releases 4.16, 4.15, 4.13, 4.12, 4.11, 4.10, and 4.9);
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Stu Grossman and John Gilmore (releases 4.8, 4.7, 4.6, 4.5, and 4.4);
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John Gilmore (releases 4.3, 4.2, 4.1, 4.0, and 3.9);
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Jim Kingdon (releases 3.5, 3.4, and 3.3);
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and Randy Smith (releases 3.2, 3.1, and 3.0).
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<p>Richard Stallman, assisted at various times by Peter TerMaat, Chris
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Hanson, and Richard Mlynarik, handled releases through 2.8.
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<p>Michael Tiemann is the author of most of the <span class="sc">gnu</span> C<tt>++</tt> support
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in <span class="sc">gdb</span>, with significant additional contributions from Per
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Bothner and Daniel Berlin. James Clark wrote the <span class="sc">gnu</span> C<tt>++</tt>
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demangler. Early work on C<tt>++</tt> was by Peter TerMaat (who also did
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much general update work leading to release 3.0).
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<p><span class="sc">gdb</span> uses the BFD subroutine library to examine multiple
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object-file formats; BFD was a joint project of David V.
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Henkel-Wallace, Rich Pixley, Steve Chamberlain, and John Gilmore.
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<p>David Johnson wrote the original COFF support; Pace Willison did
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the original support for encapsulated COFF.
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<p>Brent Benson of Harris Computer Systems contributed DWARF 2 support.
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<p>Adam de Boor and Bradley Davis contributed the ISI Optimum V support.
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Per Bothner, Noboyuki Hikichi, and Alessandro Forin contributed MIPS
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support.
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Jean-Daniel Fekete contributed Sun 386i support.
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Chris Hanson improved the HP9000 support.
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Noboyuki Hikichi and Tomoyuki Hasei contributed Sony/News OS 3 support.
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David Johnson contributed Encore Umax support.
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Jyrki Kuoppala contributed Altos 3068 support.
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Jeff Law contributed HP PA and SOM support.
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Keith Packard contributed NS32K support.
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Doug Rabson contributed Acorn Risc Machine support.
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Bob Rusk contributed Harris Nighthawk CX-UX support.
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Chris Smith contributed Convex support (and Fortran debugging).
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Jonathan Stone contributed Pyramid support.
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Michael Tiemann contributed SPARC support.
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Tim Tucker contributed support for the Gould NP1 and Gould Powernode.
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Pace Willison contributed Intel 386 support.
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Jay Vosburgh contributed Symmetry support.
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Marko Mlinar contributed OpenRISC 1000 support.
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<p>Andreas Schwab contributed M68K <span class="sc">gnu</span>/Linux support.
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<p>Rich Schaefer and Peter Schauer helped with support of SunOS shared
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libraries.
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<p>Jay Fenlason and Roland McGrath ensured that <span class="sc">gdb</span> and GAS agree
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about several machine instruction sets.
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<p>Patrick Duval, Ted Goldstein, Vikram Koka and Glenn Engel helped develop
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remote debugging. Intel Corporation, Wind River Systems, AMD, and ARM
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contributed remote debugging modules for the i960, VxWorks, A29K UDI,
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and RDI targets, respectively.
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<p>Brian Fox is the author of the readline libraries providing
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command-line editing and command history.
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<p>Andrew Beers of SUNY Buffalo wrote the language-switching code, the
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Modula-2 support, and contributed the Languages chapter of this manual.
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<p>Fred Fish wrote most of the support for Unix System Vr4.
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He also enhanced the command-completion support to cover C<tt>++</tt> overloaded
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symbols.
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<p>Hitachi America (now Renesas America), Ltd. sponsored the support for
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H8/300, H8/500, and Super-H processors.
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<p>NEC sponsored the support for the v850, Vr4xxx, and Vr5xxx processors.
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<p>Mitsubishi (now Renesas) sponsored the support for D10V, D30V, and M32R/D
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processors.
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<p>Toshiba sponsored the support for the TX39 Mips processor.
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<p>Matsushita sponsored the support for the MN10200 and MN10300 processors.
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<p>Fujitsu sponsored the support for SPARClite and FR30 processors.
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<p>Kung Hsu, Jeff Law, and Rick Sladkey added support for hardware
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watchpoints.
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<p>Michael Snyder added support for tracepoints.
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<p>Stu Grossman wrote gdbserver.
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<p>Jim Kingdon, Peter Schauer, Ian Taylor, and Stu Grossman made
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nearly innumerable bug fixes and cleanups throughout <span class="sc">gdb</span>.
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<p>The following people at the Hewlett-Packard Company contributed
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support for the PA-RISC 2.0 architecture, HP-UX 10.20, 10.30, and 11.0
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(narrow mode), HP's implementation of kernel threads, HP's aC<tt>++</tt>
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compiler, and the Text User Interface (nee Terminal User Interface):
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Ben Krepp, Richard Title, John Bishop, Susan Macchia, Kathy Mann,
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Satish Pai, India Paul, Steve Rehrauer, and Elena Zannoni. Kim Haase
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provided HP-specific information in this manual.
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<p>DJ Delorie ported <span class="sc">gdb</span> to MS-DOS, for the DJGPP project.
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Robert Hoehne made significant contributions to the DJGPP port.
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<p>Cygnus Solutions has sponsored <span class="sc">gdb</span> maintenance and much of its
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development since 1991. Cygnus engineers who have worked on <span class="sc">gdb</span>
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fulltime include Mark Alexander, Jim Blandy, Per Bothner, Kevin
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Buettner, Edith Epstein, Chris Faylor, Fred Fish, Martin Hunt, Jim
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Ingham, John Gilmore, Stu Grossman, Kung Hsu, Jim Kingdon, John Metzler,
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Fernando Nasser, Geoffrey Noer, Dawn Perchik, Rich Pixley, Zdenek
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Radouch, Keith Seitz, Stan Shebs, David Taylor, and Elena Zannoni. In
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addition, Dave Brolley, Ian Carmichael, Steve Chamberlain, Nick Clifton,
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JT Conklin, Stan Cox, DJ Delorie, Ulrich Drepper, Frank Eigler, Doug
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Evans, Sean Fagan, David Henkel-Wallace, Richard Henderson, Jeff
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Holcomb, Jeff Law, Jim Lemke, Tom Lord, Bob Manson, Michael Meissner,
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Jason Merrill, Catherine Moore, Drew Moseley, Ken Raeburn, Gavin
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Romig-Koch, Rob Savoye, Jamie Smith, Mike Stump, Ian Taylor, Angela
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Thomas, Michael Tiemann, Tom Tromey, Ron Unrau, Jim Wilson, and David
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Zuhn have made contributions both large and small.
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<p>Andrew Cagney, Fernando Nasser, and Elena Zannoni, while working for
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Cygnus Solutions, implemented the original <span class="sc">gdb/mi</span> interface.
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<p>Jim Blandy added support for preprocessor macros, while working for Red
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Hat.
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<p>Andrew Cagney designed <span class="sc">gdb</span>'s architecture vector. Many
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people including Andrew Cagney, Stephane Carrez, Randolph Chung, Nick
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Duffek, Richard Henderson, Mark Kettenis, Grace Sainsbury, Kei
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Sakamoto, Yoshinori Sato, Michael Snyder, Andreas Schwab, Jason
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Thorpe, Corinna Vinschen, Ulrich Weigand, and Elena Zannoni, helped
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with the migration of old architectures to this new framework.
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<p>Andrew Cagney completely re-designed and re-implemented <span class="sc">gdb</span>'s
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unwinder framework, this consisting of a fresh new design featuring
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frame IDs, independent frame sniffers, and the sentinel frame. Mark
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Kettenis implemented the <span class="sc">dwarf 2</span> unwinder, Jeff Johnston the
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libunwind unwinder, and Andrew Cagney the dummy, sentinel, tramp, and
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trad unwinders. The architecture-specific changes, each involving a
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complete rewrite of the architecture's frame code, were carried out by
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Jim Blandy, Joel Brobecker, Kevin Buettner, Andrew Cagney, Stephane
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Carrez, Randolph Chung, Orjan Friberg, Richard Henderson, Daniel
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Jacobowitz, Jeff Johnston, Mark Kettenis, Theodore A. Roth, Kei
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Sakamoto, Yoshinori Sato, Michael Snyder, Corinna Vinschen, and Ulrich
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Weigand.
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<p>Christian Zankel, Ross Morley, Bob Wilson, and Maxim Grigoriev from
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Tensilica, Inc. contributed support for Xtensa processors. Others
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who have worked on the Xtensa port of <span class="sc">gdb</span> in the past include
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Steve Tjiang, John Newlin, and Scott Foehner.
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<p>Michael Eager and staff of Xilinx, Inc., contributed support for the
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Xilinx MicroBlaze architecture.
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<p>Initial support for the FreeBSD/mips target and native configuration
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was developed by SRI International and the University of Cambridge
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Computer Laboratory under DARPA/AFRL contract FA8750-10-C-0237
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("CTSRD"), as part of the DARPA CRASH research programme.
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<p>Initial support for the FreeBSD/riscv target and native configuration
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was developed by SRI International and the University of Cambridge
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Computer Laboratory (Department of Computer Science and Technology)
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under DARPA contract HR0011-18-C-0016 ("ECATS"), as part of the DARPA
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SSITH research programme.
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<p>The original port to the OpenRISC 1000 is believed to be due to
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Alessandro Forin and Per Bothner. More recent ports have been the work
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of Jeremy Bennett, Franck Jullien, Stefan Wallentowitz and
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Stafford Horne.
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</body></html>
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