nativesdk-qemu: fix SDK relocation issue

User mode emulation binaries are linked using a local linker script. The
nativesdk ones were not used and the resulting binaries did not have the
interp section resized. Hence, those binaries could not be relocated.

[YOCTO #3083]

(From OE-Core rev: da014e900adfe96f01290c5a8f5fb08e295ca204)

Signed-off-by: Laurentiu Palcu <laurentiu.palcu@intel.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 40 insertions, 0 deletions

diff --git a/meta/recipes-devtools/qemu/qemu-1.2.0/relocatable_sdk.patch b/meta/recipes-devtools/qemu/qemu-1.2.0/relocatable_sdk.patch
new file mode 100644
index 0000000000..0a01a8a048
--- /dev/null
+++ b/meta/recipes-devtools/qemu/qemu-1.2.0/relocatable_sdk.patch
@@ -0,0 +1,34 @@
+Upstream-Status: Inappropriate [SDK specific]
+
+In order to be able to change the dynamic loader path when relocating
+binaries, the interp section has to be made big enough to accomodate
+the new path (4096 is the maximum path length in Linux).
+
+Signed-off-by: Laurentiu Palcu <laurentiu.palcu@intel.com>
+
+Index: qemu-1.2.0/i386.ld
+===================================================================
+--- qemu-1.2.0.orig/i386.ld
++++ qemu-1.2.0/i386.ld
+@@ -8,7 +8,7 @@ SECTIONS
+ {
+   /* Read-only sections, merged into text segment: */
+   . = 0x60000000 + SIZEOF_HEADERS;
+-  .interp     : { *(.interp)   }
++  .interp     : { *(.interp); . = 0x1000; }
+   .hash          : { *(.hash)          }
+   .dynsym        : { *(.dynsym)                }
+   .dynstr        : { *(.dynstr)                }
+Index: qemu-1.2.0/x86_64.ld
+===================================================================
+--- qemu-1.2.0.orig/x86_64.ld
++++ qemu-1.2.0/x86_64.ld
+@@ -6,7 +6,7 @@ SECTIONS
+ {
+   /* Read-only sections, merged into text segment: */
+   . = 0x60000000 + SIZEOF_HEADERS;
+-  .interp         : { *(.interp) }
++  .interp         : { *(.interp); . = 0x1000; }
+   .hash           : { *(.hash) }
+   .dynsym         : { *(.dynsym) }
+   .dynstr         : { *(.dynstr) }
diff --git a/meta/recipes-devtools/qemu/qemu_0.15.1.bb b/meta/recipes-devtools/qemu/qemu_0.15.1.bb
index f4c86f0c63..3f0b6935e7 100644
--- a/meta/recipes-devtools/qemu/qemu_0.15.1.bb
+++ b/meta/recipes-devtools/qemu/qemu_0.15.1.bb
@@ -29,6 +29,12 @@ SRC_URI[sha256sum] = "7705b14d9b8e4df4a0b1790980e618084261e8daef0672a1aa7a830a0f
 
 S = "${WORKDIR}/qemu-${PV}"
 
+PR = "r1"
+
+SRC_URI_append_virtclass-nativesdk = "\
+    file://relocatable_sdk.patch \
+    "
+
 do_configure_prepend_virtclass-nativesdk() {
         if [ "${@base_contains('DISTRO_FEATURES', 'x11', 'x11', '', d)}" = "" ] ; then
                 # Undo the -lX11 added by linker-flags.patch