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author | Jean-Baptiste Queru <jbq@google.com> | 2010-10-14 14:29:00 -0700 |
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committer | Jean-Baptiste Queru <jbq@google.com> | 2010-10-14 14:29:00 -0700 |
commit | 8e0e372a388434a0553810e2b958e59a26a6bd96 (patch) | |
tree | 94b3cf8d91ffcc3db0f027212f244cdcada402c5 /libpixelflinger/codeflinger/CodeCache.cpp | |
parent | 9cd8057b6e8f5fc1254a4ed19e8127b5091b5dce (diff) | |
download | system_core-8e0e372a388434a0553810e2b958e59a26a6bd96.zip system_core-8e0e372a388434a0553810e2b958e59a26a6bd96.tar.gz system_core-8e0e372a388434a0553810e2b958e59a26a6bd96.tar.bz2 |
Set PROT_EXEC on the whole pixelflinger code cache.
The pointer difference between word pointers is a number
of words, and it needs to be multiplied by the size of a word
to get a proper byte size.
Without this, we tend to see crashes when the code crosses
a page boundary.
Bug: 3026204
Bug: 3097482
Change-Id: I37776d26d5afcdb1da71680de02fbb95e6548371
Diffstat (limited to 'libpixelflinger/codeflinger/CodeCache.cpp')
-rw-r--r-- | libpixelflinger/codeflinger/CodeCache.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libpixelflinger/codeflinger/CodeCache.cpp b/libpixelflinger/codeflinger/CodeCache.cpp index 5877ff4..125c3ce 100644 --- a/libpixelflinger/codeflinger/CodeCache.cpp +++ b/libpixelflinger/codeflinger/CodeCache.cpp @@ -94,7 +94,7 @@ void Assembly::ensureMbaseExecutable() long pagemask = ~(pagesize - 1); // assumes pagesize is a power of 2 uint32_t* pageStart = (uint32_t*) (((uintptr_t) mBase) & pagemask); - size_t adjustedLength = mBase - pageStart + mSize; + size_t adjustedLength = (mBase - pageStart) * sizeof(uint32_t) + mSize; if (mBase && mprotect(pageStart, adjustedLength, PROT_READ | PROT_WRITE | PROT_EXEC) != 0) { mspace_free(getMspace(), mBase); |