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1 import struct
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2 from .basetarget import Register, Instruction, Target, Label, LabelRef
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3 from .basetarget import Imm32, Imm8, Imm7, Imm3
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4 from .arminstructions import allins, Reg8Op, ArmRegister
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5 from .arminstructions import Dcd, B
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6 from .arminstructions import R0, R1, R2, R3, R4, R5, R6, R7, LR, PC, SP
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7
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8 from .armframe import ArmFrame
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9 from .arminstructionselector import ArmInstructionSelector
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10
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11 """ ARM target description. """
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12
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13 # TODO: encode this in DSL (domain specific language)
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14 # TBD: is this required?
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15 # TODO: make a difference between armv7 and armv5?
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16
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17
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18 class ArmTarget(Target):
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19 def __init__(self):
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20 super().__init__('arm')
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21 for i in allins:
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22 self.addInstruction(i)
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23 # TODO: fix this nicer?
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24 #setattr(self, i.__name__, i)
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25 self.check()
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26 self.ins_sel = ArmInstructionSelector()
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27 self.FrameClass = ArmFrame
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28
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29 def startCode(self, outs):
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30 """ Emit some startup code in the output stream """
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31 outs.selectSection('code')
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32 # assembly glue to make it work:
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33 # TODO: this must be in source code, not in compiler
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34 outs.emit(Dcd(Imm32(0x20000678))) # initial SP
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35 outs.emit(Dcd(Imm32(0x08000009))) # reset vector
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36 outs.emit(B(LabelRef('main')))
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