41 lines
1.1 KiB
C
41 lines
1.1 KiB
C
/********************************************************************
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Flush register windows on sparc.
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This function is in a separate file to prevent inlining. The "flushw"
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assembler instruction used on sparcv9 flushes all register windows
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except the current one, so if it is inlined, the current register
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window of the process executing the instruction will not be flushed
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correctly.
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See https://bugs.ruby-lang.org/issues/5244 for discussion.
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*********************************************************************/
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void
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rb_sparc_flush_register_windows(void)
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{
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/*
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* gcc doesn't provide "asm" keyword if -ansi and the various -std options
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* are given.
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* https://gcc.gnu.org/onlinedocs/gcc/Alternate-Keywords.html
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*/
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#ifndef __GNUC__
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#define __asm__ asm
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#endif
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__asm__
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#ifdef __GNUC__
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__volatile__
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#endif
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/* This condition should be in sync with one in configure.ac */
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#if defined(__sparcv9) || defined(__sparc_v9__) || defined(__arch64__)
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# ifdef __GNUC__
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("flushw" : : : "%o7")
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# else
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("flushw")
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# endif /* __GNUC__ */
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#else
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("ta 0x03")
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#endif
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;
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}
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