5  * Check if thread endianness is flipped inadvertently to BE on trap
10  * and load_vec and then causing a trap in TM. Since the endianness
21  * to zero which determines a BE endianness that is the native
22  * endianness on BE machines, so nothing notably critical happens,
25  * it on BE machines LE endianness is forced after a first trap and then
26  * the endianness is verified on subsequent traps to determine if the
27  * endianness "flipped back" to the native endianness (BE).
66 	/* Get thread endianness: extract bit LE from MSR */  in trap_signal_handler()
77 			 * event that endianness is flipped by the bug, so just  in trap_signal_handler()
79 			 * check on the second trap event if endianness is  in trap_signal_handler()
87 			 * endianness was still LE (not flipped inadvertently)  in trap_signal_handler()
91 			 * LE endianness does in effect nothing, instruction (2)  in trap_signal_handler()
95 			 * the return from the signal handler the endianness in-  in trap_signal_handler()
101 			 * once in the trap handler to verify if endianness was  in trap_signal_handler()
103 			 * event. If endianness is flipped, the bug is present.  in trap_signal_handler()
119 				 * Thread endianness is BE, so it flipped  in trap_signal_handler()
137 			 * Force thread endianness to be LE. Instructions (1),  in trap_signal_handler()
147 			 * second trap event endianness will flip back "automat-  in trap_signal_handler()
148 			 * ically" to BE, otherwise thread endianness will  in trap_signal_handler()
158 			 * endianness is still LE as set on return from the  in trap_signal_handler()
200 		 * [NA] means "Native Endianness", i.e. it tells how a  in ping()
201 		 * instruction is executed on machine's native endianness (in  in ping()
202 		 * other words, native endianness matches kernel endianness).  in ping()
203 		 * [OP] means "Opposite Endianness", i.e. on a BE machine, it  in ping()
291 	/* Figure out the machine endianness */  in tm_trap_test()
294 	printf("%s machine detected. Checking if endianness flips %s",  in tm_trap_test()
323 		printf("no.\n"); /* no, endianness did not flip inadvertently */  in tm_trap_test()
327 	printf("yes!\n"); /* yes, endianness did flip inadvertently */  in tm_trap_test()