1992/0811/ss/l.s (diff list | history)

1992/0810/sys/src/9/ss/l.s:1,6 – 1992/0811/sys/src/9/ss/l.s:1,6 (short | long | prev | next)
1990/1223		#include "mem.h"
1991/1113		#define SYSPSR (SPL(0x0)|PSREF|PSRSUPER|0)
1992/0811		#define SYSPSR (SPL(0x0)|PSREF|PSRET|PSRSUPER|SPL(15)|0)
1992/0728		#define NOOP ORN R0, R0; ORN R0, R0; ORN R0, R0
1990/1226
1990/1223		TEXT start(SB), $-4
1992/0810/sys/src/9/ss/l.s:90,96 – 1992/0811/sys/src/9/ss/l.s:90,96
1990/1226		MOVW PSR, R7 MOVW R7, R10 OR $PSRET, R10
1992/0811		ANDN $SPL(15), R10
1990/1226		MOVW R10, PSR
1991/1113		NOOP
1990/1226		RETURN
1992/0810/sys/src/9/ss/l.s:100,106 – 1992/0811/sys/src/9/ss/l.s:100,106
1991/1006		MOVW R15, 4(R(MACH)) /* save PC in m->splpc */
1990/1226		MOVW PSR, R7 MOVW R7, R10 AND $~PSRET, R10 /* BUG: book says this is buggy */
1992/0811		OR $SPL(15), R10
1990/1226		MOVW R10, PSR
1991/1113		NOOP
1990/1226		RETURN
1992/0810/sys/src/9/ss/l.s:117,123 – 1992/0811/sys/src/9/ss/l.s:117,123
1990/1226		RETURN
1991/1106		TEXT touser(SB), $0
1991/1105		MOVW $(SYSPSR&~PSREF), R8
1992/0811		MOVW $(SYSPSR&~(PSREF|PSRET|SPL(15))), R8
1991/1105		MOVW R8, PSR
1991/1113		NOOP
1991/0712