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From: "schwab@linux-m68k.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug sanitizer/55975] asan does not work with 46 bit address space on PowerPC64
Date: Thu, 17 Jan 2013 23:52:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55975

--- Comment #12 from Andreas Schwab <schwab@linux-m68k.org> 2013-01-17 23:52:39 UTC ---
Created attachment 29199
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29199
make check-gcc RUNTESTFLAGS='--target_board=unix/-m64 asan.exp'

diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
index 46bb0b4..23c8c7f 100644
--- a/gcc/config/rs6000/rs6000.c
+++ b/gcc/config/rs6000/rs6000.c
@@ -27609,7 +27609,7 @@ rs6000_final_prescan_insn (rtx insn, rtx *operand
ATTRIBUTE_UNUSED,
 static unsigned HOST_WIDE_INT
 rs6000_asan_shadow_offset (void)
 {
-  return (unsigned HOST_WIDE_INT) 1 << (TARGET_64BIT ? 41 : 29);
+  return (unsigned HOST_WIDE_INT) 1 << (TARGET_64BIT ? 43 : 29);
 }
 #endif

diff --git a/libsanitizer/asan/asan_mapping.h
b/libsanitizer/asan/asan_mapping.h
index 54e21b7..6c22709 100644
--- a/libsanitizer/asan/asan_mapping.h
+++ b/libsanitizer/asan/asan_mapping.h
@@ -32,7 +32,7 @@ extern SANITIZER_INTERFACE_ATTRIBUTE uptr
__asan_mapping_offset;
 #   define SHADOW_OFFSET (1 << 29)
 #  else
 #   if defined(__powerpc64__)
-#    define SHADOW_OFFSET (1ULL << 41)
+#    define SHADOW_OFFSET (1ULL << 43)
 #   else
 #    define SHADOW_OFFSET (1ULL << 44)
 #   endif
@@ -46,7 +46,7 @@ extern SANITIZER_INTERFACE_ATTRIBUTE uptr
__asan_mapping_offset;

 #if SANITIZER_WORDSIZE == 64
 # if defined(__powerpc64__)
-  static const uptr kHighMemEnd = 0x00000fffffffffffUL;
+  static const uptr kHighMemEnd = 0x00003fffffffffffUL;
 # else
   static const uptr kHighMemEnd = 0x00007fffffffffffUL;
 # endif