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1 import struct
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342
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2 from ..basetarget import Register, Instruction, Target, Label, Alignment
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3 from ..basetarget import Imm32, Imm8, Imm7, Imm3
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4 from .instructions import Add2, Sub, Add3, Cmp, Lsl, Orr, Add, Cmp2
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5 from .instructions import Dcd, Pop, Push, Yield, Mov2, Mov3
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6 from .instructions import B, Bl, Bne, Beq, Blt, Bgt
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7 from .instructions import Ldr, Str2, Ldr2, Str1, Ldr1
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8
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9 from .armframe import ArmFrame
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10 from .arminstructionselector import ArmInstructionSelector
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11 from ..arm.registers import R0, R1, R2, R3, R4, R5, R6, R7, SP, LR, PC
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12 from ..arm.registers import register_range
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13
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14
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15 """ ARM target description. """
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16
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17 # TODO: encode this in DSL (domain specific language)
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18 # TBD: is this required?
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19 # TODO: make a difference between armv7 and armv5?
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20
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21 thumb_assembly_rules = []
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22 def add_rule(rhs, f):
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23 thumb_assembly_rules.append(('instruction', rhs, f))
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24
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25
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26 class ThumbTarget(Target):
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27 def __init__(self):
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28 super().__init__('thumb')
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29 self.ins_sel = ArmInstructionSelector()
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30 self.FrameClass = ArmFrame
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31 self.add_rules()
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32
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33 def add_rules(self):
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34
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35 # Add instructions:
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36 self.add_keyword('dcd')
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37 self.add_instruction(['dcd', 'imm32'], lambda rhs: Dcd(rhs[1]))
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38
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39 self.add_keyword('mov')
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40 self.add_instruction(['mov', 'reg8', ',', 'reg8'],
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41 lambda rhs: Mov2(rhs[1], rhs[3]))
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42
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43 self.add_instruction(['mov', 'reg8', ',', 'imm8'],
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44 lambda rhs: Mov3(rhs[1], rhs[3]))
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45
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46 self.add_keyword('add')
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47 self.add_instruction(['add', 'reg8', ',', 'reg8', ',', 'imm3'],
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48 lambda rhs: Add2(rhs[1], rhs[3], rhs[5]))
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49
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50 self.add_instruction(['add', 'reg8', ',', 'reg8', ',', 'reg8'],
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51 lambda rhs: Add3(rhs[1], rhs[3], rhs[5]))
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52
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53 self.add_keyword('sub')
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54 self.add_instruction(['sub', 'reg8', ',', 'reg8', ',', 'imm3'],
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55 lambda rhs: Sub(rhs[1], rhs[3], rhs[5]))
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56
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57 self.add_instruction(['sub', 'sp', ',', 'sp', ',', 'imm8'],
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58 lambda rhs: Sub(SP, SP, rhs[5]))
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59
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60 self.add_instruction(['add', 'sp', ',', 'sp', ',', 'imm8'],
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61 lambda rhs: Add(SP, SP, rhs[5]))
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62
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63 self.add_keyword('cmp')
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64 self.add_instruction(['cmp', 'reg8', ',', 'reg8'],
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65 lambda rhs: Cmp(rhs[1], rhs[3]))
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66 self.add_instruction(['cmp', 'reg8', ',', 'imm8'],
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67 lambda rhs: Cmp2(rhs[1], rhs[3]))
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68
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69 self.add_keyword('lsl')
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70 self.add_instruction(['lsl', 'reg8', ',', 'reg8'],
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71 lambda rhs: Lsl(rhs[1], rhs[3]))
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72
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73 self.add_keyword('str')
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74 self.add_instruction(['str', 'reg8', ',', '[', 'reg8', '+', 'imm5', ']'],
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75 lambda rhs: Str2(rhs[1], rhs[4], rhs[6]))
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76
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77 self.add_keyword('ldr')
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78 self.add_instruction(['ldr', 'reg8', ',', '[', 'reg8', '+', 'imm5', ']'],
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79 lambda rhs: Ldr2(rhs[1], rhs[4], rhs[6]))
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80
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81 self.add_instruction(['str', 'reg8', ',', '[', 'sp', '+', 'imm8', ']'],
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82 lambda rhs: Str1(rhs[1], rhs[6]))
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83
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84 self.add_instruction(['ldr', 'reg8', ',', '[', 'sp', '+', 'imm8', ']'],
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85 lambda rhs: Ldr1(rhs[1], rhs[6]))
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86
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87 self.add_keyword('pop')
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88 self.add_instruction(['pop', 'reg_list'], lambda rhs: Pop(rhs[1]))
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89 self.add_keyword('push')
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90 self.add_instruction(['push', 'reg_list'], lambda rhs: Push(rhs[1]))
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91
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92 self.add_keyword('yield')
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93 self.add_instruction(['yield'], lambda rhs: Yield())
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94
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95 self.add_keyword('b')
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96 self.add_keyword('bl')
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97 self.add_instruction(['b', 'ID'], lambda rhs: B(rhs[1].val))
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98 self.add_instruction(['bl', 'ID'], lambda rhs: Bl(rhs[1].val))
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99 self.add_keyword('beq')
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100 self.add_keyword('bne')
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101 self.add_keyword('blt')
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102 self.add_keyword('bgt')
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103 self.add_instruction(['beq', 'ID'], lambda rhs: Beq(rhs[1].val))
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104 self.add_instruction(['bne', 'ID'], lambda rhs: Bne(rhs[1].val))
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105 self.add_instruction(['blt', 'ID'], lambda rhs: Blt(rhs[1].val))
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106 self.add_instruction(['bgt', 'ID'], lambda rhs: Bgt(rhs[1].val))
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107
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108 self.add_keyword('align')
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109 self.add_instruction(['align', 'imm8'], lambda rhs: Alignment(rhs[1]))
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110
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111 self.add_instruction(['ldr', 'reg8', ',', 'ID'],
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112 lambda rhs: Ldr(rhs[1], rhs[3].val))
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113
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114 # Additional rules:
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115
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116 # Register list grammar:
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117 self.add_rule('reg_list', ['{', 'reg_list_inner', '}'],
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118 lambda rhs: rhs[1])
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119 self.add_rule('reg_list_inner', ['reg_or_range'],
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120 lambda rhs: rhs[0])
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121 self.add_rule('reg_list_inner', ['reg_or_range', ',', 'reg_list_inner'],
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122 lambda rhs: rhs[0] | rhs[2])
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123 self.add_rule('reg_or_range', ['reg8'], lambda rhs: {rhs[0]})
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124 self.add_rule('reg_or_range', ['lr'], lambda rhs: {LR})
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125 self.add_rule('reg_or_range', ['pc'], lambda rhs: {PC})
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126
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127 self.add_rule('reg_or_range', ['reg8', '-', 'reg8'],
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128 lambda rhs: register_range(rhs[0], rhs[2]))
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129
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130 self.add_keyword('r0')
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131 self.add_keyword('r1')
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132 self.add_keyword('r2')
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133 self.add_keyword('r3')
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134 self.add_keyword('r4')
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135 self.add_keyword('r5')
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136 self.add_keyword('r6')
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137 self.add_keyword('r7')
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138 self.add_keyword('sp')
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139 self.add_keyword('lr')
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140 self.add_keyword('pc')
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141 self.add_rule('reg8', ['r0'], lambda rhs: R0)
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142 self.add_rule('reg8', ['r1'], lambda rhs: R1)
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143 self.add_rule('reg8', ['r2'], lambda rhs: R2)
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144 self.add_rule('reg8', ['r3'], lambda rhs: R3)
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145 self.add_rule('reg8', ['r4'], lambda rhs: R4)
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146 self.add_rule('reg8', ['r5'], lambda rhs: R5)
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147 self.add_rule('reg8', ['r6'], lambda rhs: R6)
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148 self.add_rule('reg8', ['r7'], lambda rhs: R7)
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149 # Constants:
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150 self.add_rule('imm32', ['val32'], lambda x: x[0].val)
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151 self.add_rule('imm32', ['imm8'], lambda x: x[0])
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152 self.add_rule('imm8', ['val8'], lambda x: x[0].val)
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153 self.add_rule('imm8', ['imm5'], lambda x: x[0])
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154 self.add_rule('imm5', ['val5'], lambda x: x[0].val)
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155 self.add_rule('imm5', ['imm3'], lambda x: x[0])
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156 self.add_rule('imm3', ['val3'], lambda x: x[0].val)
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157
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