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