00001 /******************************************************************** 00002 Flush register windows on sparc. 00003 00004 This function is in a separate file to prevent inlining. The "flushw" 00005 assembler instruction used on sparcv9 flushes all register windows 00006 except the current one, so if it is inlined, the current register 00007 window of the process executing the instruction will not be flushed 00008 correctly. 00009 00010 See http://bugs.ruby-lang.org/issues/5244 for discussion. 00011 *********************************************************************/ 00012 void 00013 rb_sparc_flush_register_windows(void) 00014 { 00015 /* 00016 * gcc doesn't provide "asm" keyword if -ansi and the various -std options 00017 * are given. 00018 * http://gcc.gnu.org/onlinedocs/gcc/Alternate-Keywords.html 00019 */ 00020 #ifndef __GNUC__ 00021 #define __asm__ asm 00022 #endif 00023 00024 __asm__ 00025 #ifdef __GNUC__ 00026 __volatile__ 00027 #endif 00028 00029 /* This condition should be in sync with one in configure.in */ 00030 #if defined(__sparcv9) || defined(__sparc_v9__) || defined(__arch64__) 00031 # ifdef __GNUC__ 00032 ("flushw" : : : "%o7") 00033 # else 00034 ("flushw") 00035 # endif /* __GNUC__ */ 00036 #else 00037 ("ta 0x03") 00038 #endif 00039 ; 00040 } 00041
1.4.7