1 files changed, 59 insertions, 0 deletions
diff --git a/toolchain/uClibc/uClibc-0.9.30-xtensa-009-testandset.patch b/toolchain/uClibc/uClibc-0.9.30-xtensa-009-testandset.patch
new file mode 100644
index 000000000..f0e4eb272
--- /dev/null
+++ b/toolchain/uClibc/uClibc-0.9.30-xtensa-009-testandset.patch
@@ -0,0 +1,59 @@
+--- uClibc-0.9.29/libpthread/linuxthreads.old/sysdeps/xtensa/pt-machine.h.orig	2008-09-12 09:51:50.000000000 -0700
++++ uClibc-0.9.29/libpthread/linuxthreads.old/sysdeps/xtensa/pt-machine.h	2008-10-04 12:14:57.000000000 -0700
+@@ -26,19 +26,51 @@
+ #include <asm/unistd.h>
+ 
+ #ifndef PT_EI
+-# define PT_EI __extern_always_inline
++# define PT_EI extern inline __attribute__ ((gnu_inline))
+ #endif
+ 
+-/* Memory barrier.  */
+ #define MEMORY_BARRIER() __asm__ ("memw" : : : "memory")
++#define HAS_COMPARE_AND_SWAP
++
++extern long int testandset (int *spinlock);
++extern int __compare_and_swap (long int *p, long int oldval, long int newval);
+ 
+ /* Spinlock implementation; required.  */
+ PT_EI long int
+ testandset (int *spinlock)
+ {
+-  int unused = 0;
+-  return INTERNAL_SYSCALL (xtensa, , 4, SYS_XTENSA_ATOMIC_SET,
+-			   spinlock, 1, unused);
++	unsigned long tmp;
++	__asm__ volatile (
++"	movi	%0, 0			\n"
++"	wsr	%0, SCOMPARE1		\n"
++"	movi	%0, 1			\n"
++"	s32c1i	%0, %1, 0		\n"
++	: "=&a" (tmp)
++	: "a" (spinlock)
++	: "memory"
++	);
++	return tmp;
++}
++
++PT_EI int
++__compare_and_swap (long int *p, long int oldval, long int newval)
++{
++        unsigned long tmp;
++        unsigned long value;
++        __asm__ volatile (
++"1:     l32i    %0, %2, 0            \n"
++"       bne     %0, %4, 2f           \n"
++"       wsr     %0, SCOMPARE1        \n"
++"       mov     %1, %0               \n"
++"       mov     %0, %3               \n"
++"       s32c1i  %0, %2, 0            \n"
++"       bne     %1, %0, 1b           \n"
++"2:                                  \n"
++          : "=&a" (tmp), "=&a" (value)
++          : "a" (p), "a" (newval), "a" (oldval)
++          : "memory" );
++
++        return tmp == oldval;
+ }
+ 
+ /* Get some notion of the current stack.  Need not be exactly the top