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[PowerPC][msan] Update msan to handle changed memory layouts in newer kernels 

In more recent Linux kernels (including those with 47 bit VMAs) the layout of
virtual memory for powerpc64 changed causing the memory sanitizer to not
work properly. This patch adjusts a bit mask in the memory sanitizer to work
on the newer kernels while continuing to work on the older ones as well.

This is the non-runtime part of the patch and finishes it. ref: r317802

Tested on several 4.x and 3.x kernel releases.

llvm-svn: 318045
This commit is contained in:
Bill Seurer 2017-11-13 15:43:19 +00:00
parent 3e3ee1282b
commit 44156a0efb
1 changed files with 1 additions and 1 deletions
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2
llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp
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@ -290,7 +290,7 @@ static const MemoryMapParams Linux_MIPS64_MemoryMapParams = {
// ppc64 Linux
static const MemoryMapParams Linux_PowerPC64_MemoryMapParams = {
0x200000000000, // AndMask
0xE00000000000, // AndMask
0x100000000000, // XorMask
0x080000000000, // ShadowBase
0x1C0000000000, // OriginBase