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# T2 SDE: package/.../dietlibc/ppc-static-ctor-dtor.patch
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We build dietlibc with WANT_DYNAMIC so we get ctor/dtor handling, even
for static programs, as normally needed.

The patch zeros register 6 passed for dl_init to _dyn_start since otherwise
we end up in an inf. loop calling the _dyn_start (where r6 points to) again
and again ... This is NOT intended for upstream merge - just a quick hack
to get it working.

For ppc64 it is not an inf. loop but segfault on exit due invalid pointed
in the atexit array.

  - Rene Rebe <rene@exactcode.de>

diff -u dietlibc-0.28/ppc/start.S dietlibc-0.28-fixed/ppc/start.S
--- dietlibc-0.28/ppc/start.S	2004-09-11 14:37:57.000000000 +0200
+++ dietlibc-0.28-fixed/ppc/start.S	2005-05-03 23:47:09.000000000 +0200
@@ -27,7 +29,7 @@
 	stw	5,environ@l(14)
 
 #ifdef WANT_DYNAMIC
-	mr	6,7
+	xor	6,6,6
 	bl	_dyn_start
 #else
 #ifdef WANT_STACKGAP
--- dietlibc-0.34/ppc64/start.S.orig	2018-10-23 12:23:43.397399098 +0000
+++ dietlibc-0.34/ppc64/start.S	2018-10-23 12:26:19.301396754 +0000
@@ -71,7 +71,8 @@
 
 #ifdef WANT_DYNAMIC
 /* #warning dynamic */
-	mr	6,7
+	xor	6,6,6
+#warning dynamic
 	/* This has not been tested on ppc64le yet... */
 	bl	FN_NAME_DOTIFY(_dyn_start)
 #else