fix segfault on i686 when using ffi double-mapping for selinux (#907515)

- originally noticed with gtk2hs
- see http://hackage.haskell.org/trac/ghc/ticket/7629
- thanks Garrett Mitchener for patch committed upstream

ghc-7.6.3-rts-Adjustor-32bit-segfault.patch

@@ -0,0 +1,11 @@
+Index: rts/Adjustor.c
+===================================================================
+--- rts/Adjustor.c	(revision c2870706b29c24ac86ae2a9e2359dd1e4af71ac8)
++++ rts/Adjustor.c	(revision 27cf625ab871f34434d9fe86cecf85a31f73f0e5)
+@@ -390,5 +390,5 @@
+         
+         adjustorStub->call[0] = 0xe8;
+-        *(long*)&adjustorStub->call[1] = ((char*)&adjustorCode) - ((char*)adjustorStub + 5);
++        *(long*)&adjustorStub->call[1] = ((char*)&adjustorCode) - ((char*)code + 5);
+         adjustorStub->hptr = hptr;
+         adjustorStub->wptr = wptr;

ghc.spec

@@ -25,7 +25,7 @@ Version: 7.6.3
 # - release can only be reset if *all* library versions get bumped simultaneously
 #   (sometimes after a major release)
 # - minor release numbers for a branch should be incremented monotonically
-Release: 20%{?dist}
+Release: 21%{?dist}
 Summary: Glasgow Haskell Compiler
 
 License: %BSDHaskellReport
@@ -54,6 +54,8 @@ Patch14: ghc-7.6.3-LlvmCodeGen-no-3.3-warning.patch
 Patch15: ghc-64bit-bigendian-rts-hang-989593.patch
 # unversion library html docdirs
 Patch16: ghc-cabal-unversion-docdir.patch
+# fix libffi segfaults on 32bit
+Patch17: ghc-7.6.3-rts-Adjustor-32bit-segfault.patch
 
 # fedora ghc has been bootstrapped on
 # %{ix86} x86_64 ppc alpha sparcv9 ppc64 armv7hl armv5tel s390 s390x
@@ -242,6 +244,8 @@ ln -s $(pkg-config --variable=includedir libffi)/*.h rts/dist/build
 
 %patch16 -p1 -b .orig
 
+%patch17 -p0 -b .orig
+
 %global gen_contents_index gen_contents_index.orig
 %if %{undefined without_haddock}
 if [ ! -f "libraries/%{gen_contents_index}" ]; then
@@ -473,6 +477,11 @@ fi
 
 
 %changelog
+* Wed Jan 29 2014 Jens Petersen <petersen@redhat.com> - 7.6.3-21
+- fix segfault on i686 when using ffi double-mapping for selinux (#907515)
+  see http://hackage.haskell.org/trac/ghc/ticket/7629
+  (thanks Garrett Mitchener for patch committed upstream)
+
 * Wed Oct 30 2013 Jens Petersen <petersen@redhat.com> - 7.6.3-20
 - enable debuginfo for C code bits (#989593)
 - back to production build