[kaffe] kaffe on pxa255 runs now

[Holger Schurig]

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Kaffe on PXA255 runs now, I had to apply the attached patch.

When you use arm-linux-gcc from GCC 3.3.x AND you specify either
-march=xscale or -mcpu=xscale, then __XSCALE__ is automatically defined.

If you compile kaffe with arm-linux-gcc-2.95.3, then you could do something
like

  CFLAGS="-D__XSCALE__" ../cvshead/configure ...

-- 
Try Linux 2.6 from BitKeeper for PXA2x0 CPUs at
http://www.mn-logistik.de/unsupported/linux-2.6/
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#
# Patch managed by http://www.mn-logistik.de/unsupported/pxa250/patcher
#

--- head/config/arm/linux/md.h~pxa
+++ head/config/arm/linux/md.h
@@ -79,7 +79,11 @@
  * figured by looking at sysdeps/arm/bits/setjmp.h
  * and sysdeps/arm/setjmp.S from glibc
  */ 
+#ifdef __XSCALE__
+#define SP_OFFSET	20
+#else
 #define SP_OFFSET	8
+#endif
 #define FP_OFFSET	7
 
 #endif
--- head/config/arm/threads.h~pxa
+++ head/config/arm/threads.h
@@ -24,6 +24,10 @@
  * This is the offset into the setjmp buffer where the stack pointer is
  * stored.  This may be different with different OSes.
  */
+#ifdef __XSCALE__
+#define	SP_OFFSET		20
+#else
 #define	SP_OFFSET		23
+#endif
 
 #endif

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