Bug#548842: Apt alignment trap.

[Martin Guy <martinwguy@gmail.com>]

A patch has turned up for glibc-2.9. I'm trying it on eglibc-2.10...
See http://sourceware.org/ml/crossgcc/2009-11/msg00008.html

--- glibc-ports-2.9/sysdeps/arm/dl-machine.h.orig	2009-11-03
22:03:57.000000000 +0100
+++ glibc-ports-2.9/sysdeps/arm/dl-machine.h	2009-11-03 22:11:45.000000000 +0100
@@ -568,13 +568,22 @@
 }
 # endif

+union arm_unaligned_data {
+  Elf32_Addr l_addr;
+} __attribute__ ((packed));
+
 auto inline void
 __attribute__ ((always_inline))
 elf_machine_rel_relative (Elf32_Addr l_addr, const Elf32_Rel *reloc,
 			  void *const reloc_addr_arg)
 {
-  Elf32_Addr *const reloc_addr = reloc_addr_arg;
-  *reloc_addr += l_addr;
+  if (((long)reloc_addr_arg) & 0x3) {
+    union arm_unaligned_data *const lpdata = reloc_addr_arg;
+    lpdata->l_addr += l_addr;
+  } else {
+    Elf32_Addr *const reloc_addr = reloc_addr_arg;
+    *reloc_addr += l_addr;
+  }
 }

 # ifndef RTLD_BOOTSTRAP