package/base/dietlibc/ppc-static-ctor-dtor.patch

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   3 #
   4 # T2 SDE: package/.../dietlibc/ppc-static-ctor-dtor.patch
   5 # Copyright (C) 2004 - 2018 The T2 SDE Project
   6 #
   7 # More information can be found in the files COPYING and README.
   8 #
   9 # This patch file is dual-licensed. It is available under the license the
  10 # patched project is licensed under, as long as it is an OpenSource license
  11 # as defined at http://www.opensource.org/ (e.g. BSD, X11) or under the terms
  12 # of the GNU General Public License as published by the Free Software
  13 # Foundation; either version 2 of the License, or (at your option) any later
  14 # version.
  15 # --- T2-COPYRIGHT-NOTE-END ---
  16
  17 We build dietlibc with WANT_DYNAMIC so we get ctor/dtor handling, even
  18 for static programs, as normally needed.
  19
  20 The patch zeros register 6 passed for dl_init to _dyn_start since otherwise
  21 we end up in an inf. loop calling the _dyn_start (where r6 points to) again
  22 and again ... This is NOT intended for upstream merge - just a quick hack
  23 to get it working.
  24
  25 For ppc64 it is not an inf. loop but segfault on exit due invalid pointed
  26 in the atexit array.
  27
  28   - Rene Rebe <rene@exactcode.de>
  29
  30 diff -u dietlibc-0.28/ppc/start.S dietlibc-0.28-fixed/ppc/start.S
  31 --- dietlibc-0.28/ppc/start.S   2004-09-11 14:37:57.000000000 +0200
  32 +++ dietlibc-0.28-fixed/ppc/start.S     2005-05-03 23:47:09.000000000 +0200
  33 @@ -27,7 +29,7 @@
  34         stw     5,environ@l(14)
  35
  36  #ifdef WANT_DYNAMIC
  37 -       mr      6,7
  38 +       xor     6,6,6
  39         bl      _dyn_start
  40  #else
  41  #ifdef WANT_STACKGAP
  42 --- dietlibc-0.34/ppc64/start.S.orig    2018-10-23 12:23:43.397399098 +0000
  43 +++ dietlibc-0.34/ppc64/start.S 2018-10-23 12:26:19.301396754 +0000
  44 @@ -71,7 +71,8 @@
  45
  46  #ifdef WANT_DYNAMIC
  47  /* #warning dynamic */
  48 -       mr      6,7
  49 +       xor     6,6,6
  50 +#warning dynamic
  51         /* This has not been tested on ppc64le yet... */
  52         bl      FN_NAME_DOTIFY(_dyn_start)
  53  #else