ref: b0377e84cf31c48afed765c433abe7eebb4135a5
dir: /sys/src/9/cycv/ltrap.s/
#include "mem.h" #include "io.h" TEXT vectors(SB), $-4 MOVW $_start-KZERO(SB), R15 MOVW $_vexc(SB), R15 MOVW $_vsvc(SB), R15 MOVW $_viabt(SB), R15 MOVW $_vexc(SB), R15 MOVW $vectors(SB), R15 MOVW $_vexc(SB), R15 MOVW $_vexc(SB), R15 TEXT _viabt(SB), $-4 CPS(CPSID) CLREX DSB MOVW R14, 8(R13) MOVW SPSR, R14 MOVW R14, 4(R13) MOVW CPSR, R14 AND $0x1e, R14 B _exc TEXT _vexc(SB), $-4 CPS(CPSID) CLREX DSB MOVW R14, 8(R13) MOVW SPSR, R14 MOVW R14, 4(R13) MOVW CPSR, R14 AND $0x1f, R14 _exc: MOVW R14, 0(R13) CPS(CPSMODE | PsrMsvc) SUB $(18*4), R13 MOVM.IA [R0-R14], (R13) /* get Mach* from TPIDRPRW */ MRC 15, 0, R(Rmach), C(13), C(0), 4 MOVW 8(R(Rmach)), R(Rup) MOVW $setR12(SB), R12 ADD $12, R(Rmach), R0 MOVM.IA (R0), [R1-R3] ADD $(15*4), R13, R0 MOVM.IA [R1-R3], (R0) AND.S $0xf, R2 ADD.NE $(18*4), R13, R0 MOVW.NE R0, (13*4)(R13) ADD.EQ $(13*4), R13, R0 MOVM.IA.S.EQ [R13-R14], (R0) MOVW R13, R0 SUB $8, R13 BL trap(SB) ADD $8, R13 MOVW (16*4)(R13), R0 MOVW R0, SPSR AND.S $0xf, R0 BEQ _uret MOVW R(Rmach), (Rmach*4)(R13) MOVM.IA (R13), [R0-R14] DSB MOVM.DB.S (R13), [R15] TEXT _vsvc(SB), $-4 CLREX DSB MOVW.W R14, -4(R13) MOVW SPSR, R14 MOVW.W R14, -4(R13) MOVW $PsrMsvc, R14 MOVW.W R14, -4(R13) MOVM.DB.S [R0-R14], (R13) SUB $(15*4), R13 /* get Mach* from TPIDRPRW */ MRC 15, 0, R(Rmach), C(13), C(0), 4 MOVW 8(R(Rmach)), R(Rup) MOVW $setR12(SB), R12 MOVW R13, R0 SUB $8, R13 BL syscall(SB) ADD $8, R13 MOVW (16*4)(R13), R0 MOVW R0, SPSR _uret: MOVM.IA.S (R13), [R0-R14] ADD $(17*4), R13 DSB ISB MOVM.IA.S.W (R13), [R15]