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