Index: libgc-7.1.new/include/private/gcconfig.h
===================================================================
--- libgc-7.1.new.orig/include/private/gcconfig.h	2009-08-12 20:10:04.000000000 +0100
+++ libgc-7.1.new/include/private/gcconfig.h	2009-08-12 20:10:18.000000000 +0100
@@ -258,6 +258,10 @@
 #    define ARM32
 #    define mach_type_known
 # endif
+# if defined(LINUX) && defined(__avr32__)
+#    define AVR32
+#    define mach_type_known
+# endif
 # if defined(LINUX) && defined(__sh__)
 #    define SH
 #    define mach_type_known
@@ -1781,6 +1785,19 @@
 #   endif
 #endif
 
+# ifdef AVR32
+#   define MACH_TYPE "AVR32"
+#   define CPP_WORDSZ 32
+#   define ALIGNMENT 4
+#   define OS_TYPE "LINUX"
+#   define DYNAMIC_LOADING
+#   define LINUX_STACKBOTTOM
+#   define USE_GENERIC_PUSH_REGS
+#   define SEARCH_FOR_DATA_START
+      extern int _end[];
+#   define DATAEND (_end)
+# endif
+
 # ifdef CRIS
 #   define MACH_TYPE "CRIS"
 #   define CPP_WORDSZ 32
Index: libgc-7.1.new/include/private/thread_local_alloc.h
===================================================================
--- libgc-7.1.new.orig/include/private/thread_local_alloc.h	2009-08-12 20:10:04.000000000 +0100
+++ libgc-7.1.new/include/private/thread_local_alloc.h	2009-08-12 20:10:18.000000000 +0100
@@ -39,7 +39,7 @@
 #     else
 #       define USE_WIN32_COMPILER_TLS
 #     endif /* !GNU */
-#   elif defined(LINUX) && !defined(ARM32) && \
+#   elif defined(LINUX) && !defined(ARM32) && !defined(AVR32) && \
 		 (__GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >=3))
 #     define USE_COMPILER_TLS
 #   elif (defined(GC_DGUX386_THREADS) || defined(GC_OSF1_THREADS) || \
Index: libgc-7.1.new/libatomic_ops-1.2/src/atomic_ops/sysdeps/gcc/avr32.h
===================================================================
--- /dev/null	1970-01-01 00:00:00.000000000 +0000
+++ libgc-7.1.new/libatomic_ops-1.2/src/atomic_ops/sysdeps/gcc/avr32.h	2009-08-12 20:10:18.000000000 +0100
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2009 Bradley Smith <brad@brad-smith.co.uk>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+#include "../all_atomic_load_store.h"
+
+#include "../ordered.h"  /* There are no multiprocessor implementations. */
+
+#include "../test_and_set_t_is_ao_t.h"
+
+AO_INLINE AO_TS_VAL_t
+AO_test_and_set(volatile AO_TS_t *addr) {
+	int ret;
+
+	__asm__ __volatile__(
+		"xchg %[old], %[mem], %[newv]"
+		: [old] "=&r"(ret)
+		: [mem] "r"(addr), [newv] "r"(1)
+		: "memory");
+
+	return ret;
+}
+
+#define AO_HAVE_test_and_set
Index: libgc-7.1.new/libatomic_ops-1.2/src/atomic_ops.h
===================================================================
--- libgc-7.1.new.orig/libatomic_ops-1.2/src/atomic_ops.h	2009-08-12 20:10:04.000000000 +0100
+++ libgc-7.1.new/libatomic_ops-1.2/src/atomic_ops.h	2009-08-12 20:10:18.000000000 +0100
@@ -229,6 +229,9 @@
 # if defined(__cris__) || defined(CRIS)
 #   include "atomic_ops/sysdeps/gcc/cris.h"
 # endif
+# if defined(__avr32__)
+#   include "atomic_ops/sysdeps/gcc/avr32.h"
+# endif
 #endif /* __GNUC__ && !AO_USE_PTHREAD_DEFS */
 
 #if defined(__INTEL_COMPILER) && !defined(AO_USE_PTHREAD_DEFS)
Index: libgc-7.1.new/mach_dep.c
===================================================================
--- libgc-7.1.new.orig/mach_dep.c	2009-08-12 20:10:25.000000000 +0100
+++ libgc-7.1.new/mach_dep.c	2009-08-12 20:10:46.000000000 +0100
@@ -175,7 +175,7 @@
 #   if defined(HAVE_PUSH_REGS)
       GC_push_regs();
 #   elif defined(UNIX_LIKE) && !defined(DARWIN) && !defined(ARM32) && \
-	 !defined(HURD)
+	 !defined(HURD) && !defined(AVR32)
       /* Older versions of Darwin seem to lack getcontext(). */
       /* ARM Linux often doesn't support a real getcontext(). */
       ucontext_t ctxt;