diff options
| -rw-r--r-- | lib/Target/SparcV9/SparcV9CodeEmitter.cpp | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/lib/Target/SparcV9/SparcV9CodeEmitter.cpp b/lib/Target/SparcV9/SparcV9CodeEmitter.cpp index f56e7f3..be677e0 100644 --- a/lib/Target/SparcV9/SparcV9CodeEmitter.cpp +++ b/lib/Target/SparcV9/SparcV9CodeEmitter.cpp @@ -380,18 +380,21 @@ void JITResolver::CompilationCallback() { // Overwrite it TheJITResolver->insertJumpAtAddr(Target, CodeBegin); - RestoreRegisters(DoubleFP, FSR, FPRS, CCR); + // Flush the I-Cache: FLUSH clears out a doubleword at a given address + // Self-modifying code MUST clear out the I-Cache to be portable +#if defined(sparc) || defined(__sparc__) || defined(__sparcv9) + for (int i = -Offset, e = 32-((int64_t)Offset); i < e; i += 8) + __asm__ __volatile__ ("flush %%i7 + %0" : : "r" (i)); +#endif // Change the return address to re-execute the restore, then the jump. - // However, we can't just modify %i7 here, because we return to the function - // that will restore the floating-point registers for us. Thus, we just return - // the value we want it to be, and the parent will take care of setting %i7 - // correctly. DEBUG(std::cerr << "Callback returning to: 0x" << std::hex << (CameFrom-Offset-12) << "\n"); #if defined(sparc) || defined(__sparc__) || defined(__sparcv9) __asm__ __volatile__ ("sub %%i7, %0, %%i7" : : "r" (Offset+12)); #endif + + RestoreRegisters(DoubleFP, FSR, FPRS, CCR); } /// emitStubForFunction - This method is used by the JIT when it needs to emit |