1997/0520/pc/trap.c (diff list | history)

1997/0520/sys/src/9/pc/trap.c:492,501 – 1997/1003/sys/src/9/pc/trap.c:492,504 (short | long | prev | next)
1997/0520		* Check the segment selectors are all valid, otherwise * a fault will be taken on attempting to return to the * user process.
1997/1003		* Take care with the comparisons as different processor * generations push segment descriptors in different ways.
1997/0520		*/ if(nureg->cs != UESEL || nureg->ss != UDSEL || nureg->ds != UDSEL || nureg->es != UDSEL || nureg->fs != UDSEL || nureg->gs != UDSEL){ pprint("bad segement selector in noted\n");
1997/1003		if((nureg->cs & 0xFFFF) != UESEL || (nureg->ss & 0xFFFF) != UDSEL || (nureg->ds & 0xFFFF) != UDSEL || (nureg->es & 0xFFFF) != UDSEL || (nureg->fs & 0xFFFF) != UDSEL || (nureg->gs & 0xFFFF) != UDSEL){ pprint("bad segment selector in noted\n");
1997/0520		qunlock(&up->debug); pexit("Suicide", 0); }