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8148353: [linux-sparc] Crash in libawt.so on Linux SPARC

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Gcc expects clean 32 bit int in 64 bit register on function entry

Reviewed-by: kvn, dlong
This commit is contained in:
Roland Westrelin 2016-02-23 17:18:31 +01:00
parent 0c43809cfe
commit 744d73a67f
4 changed files with 85 additions and 2 deletions
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7
hotspot/src/cpu/sparc/vm/sharedRuntime_sparc.cpp
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@ -1349,9 +1349,12 @@ static void move32_64(MacroAssembler* masm, VMRegPair src, VMRegPair dst) {
}
} else if (dst.first()->is_stack()) {
// reg to stack
__ st_ptr(src.first()->as_Register(), SP, reg2offset(dst.first()) + STACK_BIAS);
// Some compilers (gcc) expect a clean 32 bit value on function entry
__ signx(src.first()->as_Register(), L5);
__ st_ptr(L5, SP, reg2offset(dst.first()) + STACK_BIAS);
} else {
__ mov(src.first()->as_Register(), dst.first()->as_Register());
// Some compilers (gcc) expect a clean 32 bit value on function entry
__ signx(src.first()->as_Register(), dst.first()->as_Register());
}
}