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Dir : ~/usr/src/glibc/debian/patches/powerpc/

Edit File: local-powerpc8xx-dcbz.diff

--- a/sysdeps/unix/sysv/linux/powerpc/dl-auxv.h
+++ b/sysdeps/unix/sysv/linux/powerpc/dl-auxv.h
@@ -23,8 +23,25 @@ int GLRO(dl_cache_line_size);
 #endif
 
 /* Scan the Aux Vector for the "Data Cache Block Size" entry and assign it
-   to dl_cache_line_size.  */
-#define DL_PLATFORM_AUXV						      \
+   to dl_cache_line_size. We have to detect 8xx processors, which
+   have buggy dcbz implementations that cannot report page faults
+   correctly.  That requires reading SPR, which is a privileged
+   operation.  Fortunately 2.2.18 and later emulates PowerPC mfspr
+   reads from the PVR register.  */
+#ifndef __powerpc64__
+ #define DL_PLATFORM_AUXV						      \
+      case AT_DCACHEBSIZE:						      \
+	{								      \
+	  unsigned pvr = 0;						      \
+	  asm ("mfspr %0, 287" : "=r" (pvr));				      \
+	  if ((pvr & 0xffff0000) == 0x00500000)				      \
+	    break;							      \
+	}								      \
+	GLRO(dl_cache_line_size) = av->a_un.a_val;			      \
+ 	break;
+#else
+ #define DL_PLATFORM_AUXV						      \
       case AT_DCACHEBSIZE:						      \
 	GLRO(dl_cache_line_size) = av->a_un.a_val;			      \
 	break;
+#endif