| Douglas Leung | 200f040 | 2016-02-25 20:05:47 -0800 | [diff] [blame^] | 1 | /* |
| 2 | * =========================================================================== |
| 3 | * Common subroutines and data |
| 4 | * =========================================================================== |
| 5 | */ |
| 6 | |
| 7 | .text |
| 8 | .align 2 |
| 9 | |
| 10 | /* |
| 11 | * We've detected a condition that will result in an exception, but the exception |
| 12 | * has not yet been thrown. Just bail out to the reference interpreter to deal with it. |
| 13 | * TUNING: for consistency, we may want to just go ahead and handle these here. |
| 14 | */ |
| 15 | common_errDivideByZero: |
| 16 | EXPORT_PC() |
| 17 | #if MTERP_LOGGING |
| 18 | move a0, rSELF |
| 19 | addu a1, rFP, OFF_FP_SHADOWFRAME |
| 20 | JAL(MterpLogDivideByZeroException) |
| 21 | #endif |
| 22 | b MterpCommonFallback |
| 23 | |
| 24 | common_errArrayIndex: |
| 25 | EXPORT_PC() |
| 26 | #if MTERP_LOGGING |
| 27 | move a0, rSELF |
| 28 | addu a1, rFP, OFF_FP_SHADOWFRAME |
| 29 | JAL(MterpLogArrayIndexException) |
| 30 | #endif |
| 31 | b MterpCommonFallback |
| 32 | |
| 33 | common_errNegativeArraySize: |
| 34 | EXPORT_PC() |
| 35 | #if MTERP_LOGGING |
| 36 | move a0, rSELF |
| 37 | addu a1, rFP, OFF_FP_SHADOWFRAME |
| 38 | JAL(MterpLogNegativeArraySizeException) |
| 39 | #endif |
| 40 | b MterpCommonFallback |
| 41 | |
| 42 | common_errNoSuchMethod: |
| 43 | EXPORT_PC() |
| 44 | #if MTERP_LOGGING |
| 45 | move a0, rSELF |
| 46 | addu a1, rFP, OFF_FP_SHADOWFRAME |
| 47 | JAL(MterpLogNoSuchMethodException) |
| 48 | #endif |
| 49 | b MterpCommonFallback |
| 50 | |
| 51 | common_errNullObject: |
| 52 | EXPORT_PC() |
| 53 | #if MTERP_LOGGING |
| 54 | move a0, rSELF |
| 55 | addu a1, rFP, OFF_FP_SHADOWFRAME |
| 56 | JAL(MterpLogNullObjectException) |
| 57 | #endif |
| 58 | b MterpCommonFallback |
| 59 | |
| 60 | common_exceptionThrown: |
| 61 | EXPORT_PC() |
| 62 | #if MTERP_LOGGING |
| 63 | move a0, rSELF |
| 64 | addu a1, rFP, OFF_FP_SHADOWFRAME |
| 65 | JAL(MterpLogExceptionThrownException) |
| 66 | #endif |
| 67 | b MterpCommonFallback |
| 68 | |
| 69 | MterpSuspendFallback: |
| 70 | EXPORT_PC() |
| 71 | #if MTERP_LOGGING |
| 72 | move a0, rSELF |
| 73 | addu a1, rFP, OFF_FP_SHADOWFRAME |
| 74 | lw a2, THREAD_FLAGS_OFFSET(rSELF) |
| 75 | JAL(MterpLogSuspendFallback) |
| 76 | #endif |
| 77 | b MterpCommonFallback |
| 78 | |
| 79 | /* |
| 80 | * If we're here, something is out of the ordinary. If there is a pending |
| 81 | * exception, handle it. Otherwise, roll back and retry with the reference |
| 82 | * interpreter. |
| 83 | */ |
| 84 | MterpPossibleException: |
| 85 | lw a0, THREAD_EXCEPTION_OFFSET(rSELF) |
| 86 | beqz a0, MterpFallback # If exception, fall back to reference interpreter. |
| 87 | /* intentional fallthrough - handle pending exception. */ |
| 88 | /* |
| 89 | * On return from a runtime helper routine, we've found a pending exception. |
| 90 | * Can we handle it here - or need to bail out to caller? |
| 91 | * |
| 92 | */ |
| 93 | MterpException: |
| 94 | move a0, rSELF |
| 95 | addu a1, rFP, OFF_FP_SHADOWFRAME |
| 96 | JAL(MterpHandleException) # (self, shadow_frame) |
| 97 | beqz v0, MterpExceptionReturn # no local catch, back to caller. |
| 98 | lw a0, OFF_FP_CODE_ITEM(rFP) |
| 99 | lw a1, OFF_FP_DEX_PC(rFP) |
| 100 | lw rIBASE, THREAD_CURRENT_IBASE_OFFSET(rSELF) |
| 101 | addu rPC, a0, CODEITEM_INSNS_OFFSET |
| 102 | sll a1, a1, 1 |
| 103 | addu rPC, rPC, a1 # generate new dex_pc_ptr |
| 104 | /* Do we need to switch interpreters? */ |
| 105 | JAL(MterpShouldSwitchInterpreters) |
| 106 | bnez v0, MterpFallback |
| 107 | /* resume execution at catch block */ |
| 108 | EXPORT_PC() |
| 109 | FETCH_INST() |
| 110 | GET_INST_OPCODE(t0) |
| 111 | GOTO_OPCODE(t0) |
| 112 | /* NOTE: no fallthrough */ |
| 113 | |
| 114 | /* |
| 115 | * Check for suspend check request. Assumes rINST already loaded, rPC advanced and |
| 116 | * still needs to get the opcode and branch to it, and flags are in lr. |
| 117 | */ |
| 118 | MterpCheckSuspendAndContinue: |
| 119 | lw rIBASE, THREAD_CURRENT_IBASE_OFFSET(rSELF) # refresh rIBASE |
| 120 | and ra, (THREAD_SUSPEND_REQUEST | THREAD_CHECKPOINT_REQUEST) |
| 121 | bnez ra, 1f |
| 122 | GET_INST_OPCODE(t0) # extract opcode from rINST |
| 123 | GOTO_OPCODE(t0) # jump to next instruction |
| 124 | 1: |
| 125 | EXPORT_PC() |
| 126 | move a0, rSELF |
| 127 | JAL(MterpSuspendCheck) # (self) |
| 128 | bnez v0, MterpFallback |
| 129 | GET_INST_OPCODE(t0) # extract opcode from rINST |
| 130 | GOTO_OPCODE(t0) # jump to next instruction |
| 131 | |
| 132 | /* |
| 133 | * On-stack replacement has happened, and now we've returned from the compiled method. |
| 134 | */ |
| 135 | MterpOnStackReplacement: |
| 136 | #if MTERP_LOGGING |
| 137 | move a0, rSELF |
| 138 | addu a1, rFP, OFF_FP_SHADOWFRAME |
| 139 | move a2, rINST |
| 140 | JAL(MterpLogOSR) |
| 141 | #endif |
| 142 | li v0, 1 # Signal normal return |
| 143 | b MterpDone |
| 144 | |
| 145 | /* |
| 146 | * Bail out to reference interpreter. |
| 147 | */ |
| 148 | MterpFallback: |
| 149 | EXPORT_PC() |
| 150 | #if MTERP_LOGGING |
| 151 | move a0, rSELF |
| 152 | addu a1, rFP, OFF_FP_SHADOWFRAME |
| 153 | JAL(MterpLogFallback) |
| 154 | #endif |
| 155 | MterpCommonFallback: |
| 156 | move v0, zero # signal retry with reference interpreter. |
| 157 | b MterpDone |
| 158 | /* |
| 159 | * We pushed some registers on the stack in ExecuteMterpImpl, then saved |
| 160 | * SP and LR. Here we restore SP, restore the registers, and then restore |
| 161 | * LR to PC. |
| 162 | * |
| 163 | * On entry: |
| 164 | * uint32_t* rFP (should still be live, pointer to base of vregs) |
| 165 | */ |
| 166 | MterpExceptionReturn: |
| 167 | li v0, 1 # signal return to caller. |
| 168 | b MterpDone |
| 169 | MterpReturn: |
| 170 | lw a2, OFF_FP_RESULT_REGISTER(rFP) |
| 171 | sw v0, 0(a2) |
| 172 | sw v1, 4(a2) |
| 173 | li v0, 1 # signal return to caller. |
| 174 | MterpDone: |
| 175 | /* Restore from the stack and return. Frame size = STACK_SIZE */ |
| 176 | STACK_LOAD_FULL() |
| 177 | jalr zero, ra |
| 178 | |
| 179 | .end ExecuteMterpImpl |