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2016-05-26 Martin Sebor <msebor@redhat.com>
Jakub Jelinek <jakub@redhat.com>
* asan/asan_rtl.cc (InitializeHighMemEnd): Backport part of upstream
r221457 fix and typo fix from r206158.
--- libsanitizer/asan/asan_rtl.cc.jj 2013-03-04 12:44:18.000000000 +0100
+++ libsanitizer/asan/asan_rtl.cc 2016-05-26 09:57:10.761973999 +0200
@@ -308,11 +308,13 @@ static void InitializeHighMemEnd() {
# if defined(__powerpc64__)
// FIXME:
// On PowerPC64 we have two different address space layouts: 44- and 46-bit.
- // We somehow need to figure our which one we are using now and choose
+ // We somehow need to figure out which one we are using now and choose
// one of 0x00000fffffffffffUL and 0x00003fffffffffffUL.
// Note that with 'ulimit -s unlimited' the stack is moved away from the top
// of the address space, so simply checking the stack address is not enough.
- kHighMemEnd = (1ULL << 44) - 1; // 0x00000fffffffffffUL
+ // This should (does) work for both PowerPC64 Endian modes.
+ kHighMemEnd =
+ (1ULL << (MostSignificantSetBitIndex(GET_CURRENT_FRAME()) + 1)) - 1;
# else
kHighMemEnd = (1ULL << 47) - 1; // 0x00007fffffffffffUL;
# endif