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--- a/sysdeps/unix/sysv/linux/powerpc/dl-auxv.h
+++ b/sysdeps/unix/sysv/linux/powerpc/dl-auxv.h
@@ -16,5 +16,21 @@
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
+#ifndef __powerpc64__
+/* 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. */
+#define DL_PLATFORM_AUXV \
+ { \
+ unsigned pvr = 0; \
+ asm ("mfspr %0, 287" : "=r" (pvr)); \
+ if ((pvr & 0xffff0000) == 0x00500000) \
+ GLRO(dl_cache_line_size) = 0; \
+ else \
+ GLRO(dl_cache_line_size) = auxv_values[AT_DCACHEBSIZE]; \
+ }
+#else
#define DL_PLATFORM_AUXV \
GLRO(dl_cache_line_size) = auxv_values[AT_DCACHEBSIZE];
+#endif
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