2000/1012/bitsy/l.s (diff list | history)

2000/1010/sys/src/9/bitsy/l.s:173,180 – 2000/1012/sys/src/9/bitsy/l.s:173,180 (short | long | prev | next)
2000/1007		WORD $_vsvc(SB) /* reset, in svc mode already */ WORD $_vund(SB) /* undefined, switch to svc mode */ WORD $_vsvc(SB) /* swi, in svc mode already */ WORD $_vabt(SB) /* prefetch abort, switch to svc mode */ WORD $_vabt(SB) /* data abort, switch to svc mode */
2000/1012		WORD $_vpabt(SB) /* prefetch abort, switch to svc mode */ WORD $_vdabt(SB) /* data abort, switch to svc mode */
2000/1007		WORD $_vsvc(SB) /* reserved */ WORD $_virq(SB) /* IRQ, switch to svc mode */ WORD $_vfiq(SB) /* FIQ, switch to svc mode */
2000/1010/sys/src/9/bitsy/l.s:208,218 – 2000/1012/sys/src/9/bitsy/l.s:208,223
2000/0831		MOVW $PsrMund, R0 B _vswitch
2000/1001		TEXT _vabt(SB), $-4 /* prefetch abort */
2000/1012		TEXT _vpabt(SB), $-4 /* prefetch abort */
2000/1002		MOVM.IA [R0-R4], (R13) /* free some working space */
2000/0904		MOVW $PsrMabt, R0 /* r0 = type */
2000/0831		B _vswitch
2000/1012		TEXT _vdabt(SB), $-4 /* prefetch abort */ MOVM.IA [R0-R4], (R13) /* free some working space */ MOVW $(PsrMabt+1), R0 /* r0 = type */ B _vswitch
2000/0904		TEXT _virq(SB), $-4 /* IRQ */
2000/1002		MOVM.IA [R0-R4], (R13) /* free some working space */
2000/0904		MOVW $PsrMirq, R0 /* r0 = type */
2000/1010/sys/src/9/bitsy/l.s:277,282 – 2000/1012/sys/src/9/bitsy/l.s:282,314
2000/1002		TEXT _vfiq(SB), $-4 /* FIQ */ RFE /* FIQ is special, ignore it for now */
2000/1012		/* * This is the first jump from kernel to user mode. * Fake a return from interrupt. * * Enter with R0 containing the user stack pointer. * UTZERO + 0x20 is always the entry point. * */ TEXT touser(SB),$-4 /* store the user stack pointer into the USR_r13 */ MOVM.DB.W [R0], (R13) MOVM.S.IA.W (R13),[R13] /* set up a PSR for user level */ MOVW $(PsrMusr), R0 MOVW R0,SPSR /* save the PC on the stack */ MOVW $(UTZERO+0x20), R0 MOVM.DB.W [R0],(R13) /* return from interrupt */ RFE /* MOVM.IA.S.W (R13), [R15] */ /* * here to jump to a newly forked process */
2000/1002		TEXT forkret(SB),$-4 ADD $(4*15), R13 /* make r13 point to ureg->type */ MOVW 8(R13), R14 /* restore link */