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Experimental fix for PR4960.

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- Could we just always implement this as __clear_cache for __GNUC__?

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81655 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Daniel Dunbar 2009-09-12 23:29:02 +00:00
parent 7cb384dcca
commit 299f11f662
1 changed files with 14 additions and 5 deletions
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19
lib/System/Memory.cpp
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@ -37,13 +37,16 @@ void llvm::sys::Memory::InvalidateInstructionCache(const void *Addr,
// icache invalidation for PPC and ARM.
#if defined(__APPLE__)
#if (defined(__POWERPC__) || defined (__ppc__) || \
# if (defined(__POWERPC__) || defined (__ppc__) || \
defined(_POWER) || defined(_ARCH_PPC)) || defined(__arm__)
sys_icache_invalidate(Addr, Len);
#endif
# endif
#else
#if (defined(__POWERPC__) || defined (__ppc__) || \
defined(_POWER) || defined(_ARCH_PPC)) && defined(__GNUC__)
# if (defined(__POWERPC__) || defined (__ppc__) || \
defined(_POWER) || defined(_ARCH_PPC)) && defined(__GNUC__)
const size_t LineSize = 32;
const intptr_t Mask = ~(LineSize - 1);
@ -57,6 +60,12 @@ void llvm::sys::Memory::InvalidateInstructionCache(const void *Addr,
for (intptr_t Line = StartLine; Line < EndLine; Line += LineSize)
asm volatile("icbi 0, %0" : : "r"(Line));
asm volatile("isync");
#endif
# elif defined(__arm__) && defined(__GNUC__)
// FIXME: Can we safely always call this for __GNUC__ everywhere?
char *Start = (char*) Addr;
char *End = Start + Len;
__clear_cache(Start, End);
# endif
#endif // end apple
}