microblaze: fix musl support

For musl we need patches for bintils 2.25.1 and 2.26.1.
Binutils 2.27 and gcc 6.2.x does not work for microblaze,
even not for uClibc-ng or glibc.
For gcc 5.4.x the existing patch need reworking so that
musl and uClibc-ng is supported.

Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
[Thomas:
 - Add proper description for the binutils patches
 - Use BR2_microblaze instead of BR2_microblazeel and BR2_microblazebz]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

3 files changed, 47 insertions, 0 deletions

diff --git a/package/binutils/2.25.1/800-microblaze-musl.patch b/package/binutils/2.25.1/800-microblaze-musl.patch
new file mode 100644
index 0000000000..34e69fd548
--- /dev/null
+++ b/package/binutils/2.25.1/800-microblaze-musl.patch
@@ -0,0 +1,22 @@
+Fix the genetation of GOT entries for the Microblaze target.
+
+PR target/19516
+* elf32-microblaze.c (microblaze_elf_finish_dynamic_symbol):
+Always produce a RELATIVE reloc for a local symbol.
+
+[Taken from https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=47993b4af18c6ef1cad300f6393bf896d3cb5e5c.]
+Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
+
+diff -Nur binutils-2.25.1.orig/bfd/elf32-microblaze.c binutils-2.25.1/bfd/elf32-microblaze.c
+--- binutils-2.25.1.orig/bfd/elf32-microblaze.c	2015-07-21 10:20:58.000000000 +0200
++++ binutils-2.25.1/bfd/elf32-microblaze.c	2016-02-14 11:38:45.822387506 +0100
+@@ -3293,8 +3293,7 @@
+          The entry in the global offset table will already have been
+          initialized in the relocate_section function.  */
+       if (info->shared
+-          && (info->symbolic || h->dynindx == -1)
+-          && h->def_regular)
++          && ((info->symbolic && h->def_regular) || h->dynindx == -1))
+         {
+           asection *sec = h->root.u.def.section;
+           microblaze_elf_output_dynamic_relocation (output_bfd,
diff --git a/package/binutils/2.26.1/0800-microblaze-musl.patch b/package/binutils/2.26.1/0800-microblaze-musl.patch
new file mode 100644
index 0000000000..5e45058f6c
--- /dev/null
+++ b/package/binutils/2.26.1/0800-microblaze-musl.patch
@@ -0,0 +1,23 @@
+Fix the genetation of GOT entries for the Microblaze target.
+
+PR target/19516
+* elf32-microblaze.c (microblaze_elf_finish_dynamic_symbol):
+Always produce a RELATIVE reloc for a local symbol.
+
+[Taken from https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=47993b4af18c6ef1cad300f6393bf896d3cb5e5c.]
+Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
+
+diff -Nur binutils-2.26.1.orig/bfd/elf32-microblaze.c binutils-2.26.1/bfd/elf32-microblaze.c
+--- binutils-2.26.1.orig/bfd/elf32-microblaze.c	2015-11-13 09:27:40.000000000 +0100
++++ binutils-2.26.1/bfd/elf32-microblaze.c	2016-10-20 19:06:58.655565765 +0200
+@@ -3296,8 +3296,8 @@
+          The entry in the global offset table will already have been
+          initialized in the relocate_section function.  */
+       if (bfd_link_pic (info)
+-          && (info->symbolic || h->dynindx == -1)
+-          && h->def_regular)
++	  && ((info->symbolic && h->def_regular)
++		|| h->dynindx == -1))
+         {
+           asection *sec = h->root.u.def.section;
+           microblaze_elf_output_dynamic_relocation (output_bfd,
diff --git a/package/binutils/Config.in.host b/package/binutils/Config.in.host
index 3e0c357d99..a7610b447c 100644
--- a/package/binutils/Config.in.host
+++ b/package/binutils/Config.in.host
@@ -17,6 +17,8 @@ choice
 
 	config BR2_BINUTILS_VERSION_2_27_X
 		bool "binutils 2.27"
+		# supported but broken on Microblaze
+		depends on !BR2_microblaze
 
 endchoice