[POWERPC] Fix si_addr value on low level hash failures
authorBenjamin Herrenschmidt <benh@kernel.crashing.org>
Wed, 7 Nov 2007 06:17:02 +0000 (17:17 +1100)
committerPaul Mackerras <paulus@samba.org>
Thu, 8 Nov 2007 03:15:34 +0000 (14:15 +1100)
If the low level MMU hash table insertion returns an error (which
can happen in some rare circumstances when the hypervisor refuses
the insertion of a PTE, typically if you try to access junk via
/dev/mem), the generated signal had an incorrect si_addr value due
to a bug in the assembly, which was loading it as a 32 bits quantity
instead of a 64 bits quantity.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
arch/powerpc/kernel/head_64.S

index 97c5857faf00d830d3022fdc4bd99caeefaed974..c34986835a4e6f80593ed4588b0bf681f5628c9c 100644 (file)
@@ -904,7 +904,7 @@ handle_page_fault:
  */
 12:    bl      .save_nvgprs
        addi    r3,r1,STACK_FRAME_OVERHEAD
-       lwz     r4,_DAR(r1)
+       l     r4,_DAR(r1)
        bl      .low_hash_fault
        b       .ret_from_except