Details | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
1189 | heavyiron | 1 | |
2 | ; Copyright (c) 1999-2009, Tomasz Grysztar. |
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3 | ; All rights reserved. |
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4 | |||
5 | |||
6 | mov eax,[memory_end] |
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7 | mov [labels_list],eax |
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8 | mov eax,[additional_memory] |
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9 | mov [free_additional_memory],eax |
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10 | xor eax,eax |
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11 | mov [current_locals_prefix],eax |
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12 | mov [anonymous_reverse],eax |
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13 | mov [anonymous_forward],eax |
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14 | mov [hash_tree],eax |
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15 | mov [blocks_stack],eax |
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16 | mov [parsed_lines],eax |
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17 | mov esi,[memory_start] |
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18 | mov edi,[source_start] |
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19 | parser_loop: |
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20 | mov [current_line],esi |
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21 | lea eax,[edi+100h] |
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22 | cmp eax,[labels_list] |
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23 | jae out_of_memory |
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24 | cmp byte [esi+16],0 |
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25 | je empty_line |
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26 | cmp byte [esi+16],3Bh |
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27 | je empty_line |
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28 | mov al,0Fh |
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29 | stos byte [edi] |
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30 | mov eax,esi |
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31 | stos dword [edi] |
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32 | inc [parsed_lines] |
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33 | add esi,16 |
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34 | parse_line: |
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35 | cmp byte [esi],1Ah |
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36 | jne empty_instruction |
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37 | push edi |
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38 | add esi,2 |
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39 | movzx ecx,byte [esi-1] |
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40 | cmp byte [esi+ecx],':' |
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41 | je simple_label |
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42 | cmp byte [esi+ecx],'=' |
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43 | je constant_label |
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44 | call get_instruction |
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45 | jnc main_instruction_identified |
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46 | cmp byte [esi+ecx],1Ah |
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47 | jne no_data_label |
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48 | push esi ecx |
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49 | lea esi,[esi+ecx+2] |
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50 | movzx ecx,byte [esi-1] |
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51 | call get_data_directive |
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52 | jnc data_label |
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53 | pop ecx esi |
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54 | no_data_label: |
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55 | call get_data_directive |
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56 | jnc main_instruction_identified |
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57 | pop edi |
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58 | sub esi,2 |
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59 | xor bx,bx |
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60 | call parse_line_contents |
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61 | jmp parse_next_line |
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62 | simple_label: |
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63 | pop edi |
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64 | call identify_label |
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65 | mov byte [edi],2 |
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66 | inc edi |
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67 | stos dword [edi] |
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68 | inc esi |
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69 | xor al,al |
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70 | stos byte [edi] |
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71 | jmp parse_line |
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72 | constant_label: |
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73 | pop edi |
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74 | call get_label_id |
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75 | mov byte [edi],3 |
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76 | inc edi |
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77 | stos dword [edi] |
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78 | xor al,al |
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79 | stos byte [edi] |
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80 | inc esi |
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81 | xor bx,bx |
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82 | call parse_line_contents |
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83 | jmp parse_next_line |
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84 | data_label: |
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85 | pop ecx edx |
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86 | pop edi |
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87 | push eax ebx esi |
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88 | mov esi,edx |
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89 | movzx ecx,byte [esi-1] |
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90 | call identify_label |
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91 | mov byte [edi],2 |
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92 | inc edi |
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93 | stos dword [edi] |
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94 | pop esi ebx eax |
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95 | stos byte [edi] |
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96 | push edi |
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97 | main_instruction_identified: |
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98 | pop edi |
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99 | mov dl,al |
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100 | mov al,1 |
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101 | stos byte [edi] |
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102 | mov ax,bx |
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103 | stos word [edi] |
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104 | mov al,dl |
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105 | stos byte [edi] |
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106 | cmp bx,if_directive-assembler |
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107 | je parse_block |
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108 | cmp bx,repeat_directive-assembler |
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109 | je parse_block |
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110 | cmp bx,while_directive-assembler |
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111 | je parse_block |
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112 | cmp bx,end_directive-assembler |
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113 | je parse_end_directive |
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114 | cmp bx,else_directive-assembler |
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115 | je parse_else |
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116 | common_parse: |
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117 | call parse_line_contents |
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118 | jmp parse_next_line |
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119 | empty_instruction: |
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120 | lods byte [esi] |
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121 | or al,al |
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122 | jz parse_next_line |
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123 | cmp al,':' |
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124 | je invalid_name |
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125 | dec esi |
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126 | cmp al,3Bh |
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127 | je skip_rest_of_line |
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128 | call parse_argument |
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129 | jmp parse_next_line |
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130 | empty_line: |
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131 | add esi,16 |
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132 | skip_rest_of_line: |
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133 | call skip_foreign_line |
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134 | parse_next_line: |
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135 | cmp esi,[source_start] |
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136 | jb parser_loop |
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137 | source_parsed: |
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138 | cmp [blocks_stack],0 |
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139 | je blocks_stack_ok |
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140 | pop eax |
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141 | pop [current_line] |
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142 | jmp missing_end_directive |
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143 | blocks_stack_ok: |
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144 | xor al,al |
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145 | stos byte [edi] |
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146 | add edi,0Fh |
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147 | and edi,not 0Fh |
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148 | mov [code_start],edi |
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149 | ret |
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150 | parse_block: |
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151 | mov eax,esp |
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152 | sub eax,100h |
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153 | jc stack_overflow |
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154 | cmp eax,[stack_limit] |
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155 | jb stack_overflow |
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156 | push [current_line] |
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157 | mov ax,bx |
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158 | shl eax,16 |
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159 | push eax |
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160 | inc [blocks_stack] |
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161 | cmp bx,if_directive-assembler |
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162 | je parse_if |
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163 | cmp bx,while_directive-assembler |
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164 | je parse_while |
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165 | call parse_line_contents |
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166 | jmp parse_next_line |
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167 | parse_end_directive: |
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168 | cmp byte [esi],1Ah |
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169 | jne common_parse |
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170 | push edi |
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171 | inc esi |
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172 | movzx ecx,byte [esi] |
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173 | inc esi |
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174 | call get_instruction |
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175 | pop edi |
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176 | jnc parse_end_block |
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177 | sub esi,2 |
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178 | jmp common_parse |
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179 | parse_end_block: |
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180 | mov dl,al |
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181 | mov al,1 |
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182 | stos byte [edi] |
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183 | mov ax,bx |
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184 | stos word [edi] |
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185 | mov al,dl |
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186 | stos byte [edi] |
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187 | lods byte [esi] |
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188 | or al,al |
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189 | jnz extra_characters_on_line |
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190 | cmp bx,if_directive-assembler |
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191 | je close_parsing_block |
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192 | cmp bx,repeat_directive-assembler |
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193 | je close_parsing_block |
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194 | cmp bx,while_directive-assembler |
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195 | je close_parsing_block |
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196 | jmp parse_next_line |
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197 | close_parsing_block: |
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198 | cmp [blocks_stack],0 |
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199 | je unexpected_instruction |
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200 | cmp bx,[esp+2] |
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201 | jne unexpected_instruction |
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202 | dec [blocks_stack] |
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203 | pop eax edx |
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204 | cmp bx,if_directive-assembler |
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205 | jne parse_next_line |
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206 | test al,1100b |
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207 | jz parse_next_line |
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208 | test al,10000b |
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209 | jnz parse_next_line |
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210 | sub edi,8 |
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211 | jmp parse_next_line |
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212 | parse_if: |
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213 | push edi |
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214 | call parse_line_contents |
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215 | xor al,al |
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216 | stos byte [edi] |
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217 | xchg esi,[esp] |
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218 | mov edi,esi |
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219 | call preevaluate_logical_expression |
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220 | pop esi |
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221 | cmp al,'0' |
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222 | je parse_false_condition_block |
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223 | cmp al,'1' |
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224 | je parse_true_condition_block |
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225 | or byte [esp],10000b |
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226 | jmp parse_next_line |
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227 | parse_while: |
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228 | push edi |
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229 | call parse_line_contents |
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230 | xor al,al |
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231 | stos byte [edi] |
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232 | xchg esi,[esp] |
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233 | mov edi,esi |
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234 | call preevaluate_logical_expression |
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235 | pop esi |
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236 | cmp al,'0' |
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237 | je parse_false_condition_block |
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238 | cmp al,'1' |
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239 | jne parse_next_line |
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240 | stos byte [edi] |
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241 | jmp parse_next_line |
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242 | parse_false_condition_block: |
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243 | or byte [esp],1 |
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244 | sub edi,4 |
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245 | jmp skip_parsing |
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246 | parse_true_condition_block: |
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247 | or byte [esp],100b |
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248 | sub edi,4 |
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249 | jmp parse_next_line |
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250 | parse_else: |
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251 | cmp [blocks_stack],0 |
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252 | je unexpected_instruction |
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253 | cmp word [esp+2],if_directive-assembler |
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254 | jne unexpected_instruction |
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255 | lods byte [esi] |
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256 | or al,al |
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257 | jz parse_pure_else |
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258 | cmp al,1Ah |
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259 | jne extra_characters_on_line |
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260 | push edi |
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261 | movzx ecx,byte [esi] |
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262 | inc esi |
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263 | call get_instruction |
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264 | jc extra_characters_on_line |
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265 | pop edi |
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266 | cmp bx,if_directive-assembler |
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267 | jne extra_characters_on_line |
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268 | test byte [esp],100b |
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269 | jnz skip_true_condition_else |
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270 | mov dl,al |
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271 | mov al,1 |
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272 | stos byte [edi] |
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273 | mov ax,bx |
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274 | stos word [edi] |
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275 | mov al,dl |
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276 | stos byte [edi] |
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277 | jmp parse_if |
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278 | skip_true_condition_else: |
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279 | sub edi,4 |
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280 | or byte [esp],1 |
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281 | jmp skip_parsing_contents |
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282 | parse_pure_else: |
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283 | bts dword [esp],1 |
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284 | jc unexpected_instruction |
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285 | test byte [esp],100b |
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286 | jz parse_next_line |
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287 | sub edi,4 |
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288 | or byte [esp],1 |
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289 | jmp skip_parsing |
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290 | skip_parsing: |
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291 | cmp esi,[source_start] |
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292 | jae source_parsed |
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293 | mov [current_line],esi |
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294 | add esi,16 |
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295 | skip_parsing_line: |
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296 | cmp byte [esi],1Ah |
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297 | jne skip_parsing_contents |
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298 | inc esi |
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299 | movzx ecx,byte [esi] |
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300 | inc esi |
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301 | cmp byte [esi+ecx],':' |
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302 | je skip_parsing_label |
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303 | push edi |
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304 | call get_instruction |
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305 | pop edi |
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306 | jnc skip_parsing_instruction |
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307 | add esi,ecx |
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308 | jmp skip_parsing_contents |
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309 | skip_parsing_label: |
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310 | lea esi,[esi+ecx+1] |
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311 | jmp skip_parsing_line |
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312 | skip_parsing_instruction: |
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313 | cmp bx,if_directive-assembler |
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314 | je skip_parsing_block |
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315 | cmp bx,repeat_directive-assembler |
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316 | je skip_parsing_block |
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317 | cmp bx,while_directive-assembler |
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318 | je skip_parsing_block |
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319 | cmp bx,end_directive-assembler |
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320 | je skip_parsing_end_directive |
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321 | cmp bx,else_directive-assembler |
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322 | je skip_parsing_else |
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323 | skip_parsing_contents: |
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324 | lods byte [esi] |
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325 | or al,al |
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326 | jz skip_parsing |
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327 | cmp al,1Ah |
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328 | je skip_parsing_symbol |
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329 | cmp al,3Bh |
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330 | je skip_parsing_symbol |
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331 | cmp al,22h |
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332 | je skip_parsing_string |
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333 | jmp skip_parsing_contents |
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334 | skip_parsing_symbol: |
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335 | lods byte [esi] |
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336 | movzx eax,al |
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337 | add esi,eax |
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338 | jmp skip_parsing_contents |
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339 | skip_parsing_string: |
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340 | lods dword [esi] |
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341 | add esi,eax |
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342 | jmp skip_parsing_contents |
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343 | skip_parsing_block: |
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344 | mov eax,esp |
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345 | sub eax,100h |
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346 | jc stack_overflow |
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347 | cmp eax,[stack_limit] |
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348 | jb stack_overflow |
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349 | push [current_line] |
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350 | mov ax,bx |
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351 | shl eax,16 |
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352 | push eax |
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353 | inc [blocks_stack] |
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354 | jmp skip_parsing_contents |
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355 | skip_parsing_end_directive: |
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356 | cmp byte [esi],1Ah |
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357 | jne skip_parsing_contents |
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358 | push edi |
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359 | inc esi |
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360 | movzx ecx,byte [esi] |
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361 | inc esi |
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362 | call get_instruction |
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363 | pop edi |
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364 | jnc skip_parsing_end_block |
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365 | add esi,ecx |
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366 | jmp skip_parsing_contents |
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367 | skip_parsing_end_block: |
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368 | lods byte [esi] |
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369 | or al,al |
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370 | jnz extra_characters_on_line |
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371 | cmp bx,if_directive-assembler |
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372 | je close_skip_parsing_block |
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373 | cmp bx,repeat_directive-assembler |
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374 | je close_skip_parsing_block |
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375 | cmp bx,while_directive-assembler |
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376 | je close_skip_parsing_block |
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377 | jmp skip_parsing |
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378 | close_skip_parsing_block: |
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379 | cmp [blocks_stack],0 |
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380 | je unexpected_instruction |
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381 | cmp bx,[esp+2] |
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382 | jne unexpected_instruction |
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383 | dec [blocks_stack] |
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384 | pop eax edx |
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385 | test al,1 |
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386 | jz skip_parsing |
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387 | cmp bx,if_directive-assembler |
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388 | jne parse_next_line |
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389 | test al,10000b |
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390 | jz parse_next_line |
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391 | mov al,0Fh |
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392 | stos byte [edi] |
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393 | mov eax,[current_line] |
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394 | stos dword [edi] |
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395 | inc [parsed_lines] |
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396 | mov eax,1 + (end_directive-assembler) shl 8 |
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397 | stos dword [edi] |
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398 | mov eax,1 + (if_directive-assembler) shl 8 |
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399 | stos dword [edi] |
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400 | jmp parse_next_line |
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401 | skip_parsing_else: |
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402 | cmp [blocks_stack],0 |
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403 | je unexpected_instruction |
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404 | cmp word [esp+2],if_directive-assembler |
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405 | jne unexpected_instruction |
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406 | lods byte [esi] |
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407 | or al,al |
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408 | jz skip_parsing_pure_else |
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409 | cmp al,1Ah |
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410 | jne extra_characters_on_line |
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411 | push edi |
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412 | movzx ecx,byte [esi] |
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413 | inc esi |
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414 | call get_instruction |
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415 | jc extra_characters_on_line |
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416 | pop edi |
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417 | cmp bx,if_directive-assembler |
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418 | jne extra_characters_on_line |
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419 | mov al,[esp] |
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420 | test al,1 |
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421 | jz skip_parsing_contents |
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422 | test al,100b |
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423 | jnz skip_parsing_contents |
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424 | test al,10000b |
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425 | jnz parse_else_if |
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426 | xor al,al |
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427 | mov [esp],al |
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428 | mov al,0Fh |
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429 | stos byte [edi] |
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430 | mov eax,[current_line] |
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431 | stos dword [edi] |
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432 | inc [parsed_lines] |
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433 | parse_else_if: |
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434 | mov eax,1 + (if_directive-assembler) shl 8 |
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435 | stos dword [edi] |
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436 | jmp parse_if |
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437 | skip_parsing_pure_else: |
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438 | bts dword [esp],1 |
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439 | jc unexpected_instruction |
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440 | mov al,[esp] |
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441 | test al,1 |
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442 | jz skip_parsing |
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443 | test al,100b |
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444 | jnz skip_parsing |
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445 | and al,not 1 |
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446 | or al,1000b |
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447 | mov [esp],al |
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448 | jmp parse_next_line |
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449 | |||
450 | |||
451 | mov [parenthesis_stack],0 |
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452 | parse_instruction_arguments: |
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453 | cmp bx,prefix_instruction-assembler |
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454 | je allow_embedded_instruction |
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455 | cmp bx,times_directive-assembler |
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456 | je parse_times_directive |
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457 | cmp bx,end_directive-assembler |
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458 | je allow_embedded_instruction |
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459 | cmp bx,label_directive-assembler |
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460 | je parse_label_directive |
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461 | cmp bx,segment_directive-assembler |
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462 | je parse_label_directive |
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463 | cmp bx,load_directive-assembler |
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464 | je parse_load_directive |
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465 | cmp bx,extrn_directive-assembler |
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466 | je parse_extrn_directive |
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467 | cmp bx,public_directive-assembler |
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468 | je parse_public_directive |
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469 | parse_argument: |
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470 | lea eax,[edi+100h] |
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471 | cmp eax,[labels_list] |
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472 | jae out_of_memory |
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473 | lods byte [esi] |
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474 | cmp al,':' |
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475 | je instruction_separator |
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476 | cmp al,',' |
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477 | je separator |
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478 | cmp al,'=' |
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479 | je separator |
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480 | cmp al,'|' |
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481 | je separator |
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482 | cmp al,'&' |
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483 | je separator |
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484 | cmp al,'~' |
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485 | je separator |
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486 | cmp al,'>' |
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487 | je greater |
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488 | cmp al,'<' |
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489 | je less |
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490 | cmp al,')' |
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491 | je close_parenthesis |
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492 | or al,al |
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493 | jz contents_parsed |
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494 | cmp al,'[' |
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495 | je address_argument |
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496 | cmp al,']' |
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497 | je separator |
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498 | cmp al,'{' |
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499 | je unallowed_character |
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500 | cmp al,'}' |
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501 | je unallowed_character |
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502 | cmp al,'#' |
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503 | je unallowed_character |
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504 | cmp al,'`' |
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505 | je unallowed_character |
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506 | dec esi |
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507 | cmp al,1Ah |
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508 | jne expression_argument |
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509 | push edi |
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510 | mov edi,directive_operators |
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511 | call get_operator |
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512 | or al,al |
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513 | jnz operator_argument |
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514 | inc esi |
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515 | movzx ecx,byte [esi] |
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516 | inc esi |
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517 | call get_symbol |
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518 | jnc symbol_argument |
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519 | cmp ecx,1 |
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520 | jne check_argument |
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521 | cmp byte [esi],'?' |
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522 | jne check_argument |
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523 | pop edi |
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524 | movs byte [edi],[esi] |
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525 | jmp argument_parsed |
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526 | symbol_argument: |
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527 | pop edi |
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528 | stos word [edi] |
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529 | jmp argument_parsed |
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530 | operator_argument: |
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531 | pop edi |
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532 | cmp al,85h |
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533 | je ptr_argument |
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534 | stos byte [edi] |
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535 | cmp al,80h |
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536 | je forced_expression |
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537 | cmp al,81h |
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538 | je forced_parenthesis |
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539 | cmp al,82h |
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540 | je parse_from_operator |
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541 | cmp al,89h |
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542 | je parse_label_operator |
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543 | jmp argument_parsed |
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544 | allow_embedded_instruction: |
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545 | cmp byte [esi],1Ah |
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546 | jne parse_argument |
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547 | push edi |
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548 | inc esi |
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549 | movzx ecx,byte [esi] |
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550 | inc esi |
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551 | call get_instruction |
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552 | jnc embedded_instruction |
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553 | call get_data_directive |
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554 | jnc embedded_instruction |
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555 | pop edi |
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556 | sub esi,2 |
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557 | jmp parse_argument |
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558 | embedded_instruction: |
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559 | pop edi |
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560 | mov dl,al |
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561 | mov al,1 |
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562 | stos byte [edi] |
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563 | mov ax,bx |
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564 | stos word [edi] |
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565 | mov al,dl |
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566 | stos byte [edi] |
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567 | jmp parse_instruction_arguments |
||
568 | parse_times_directive: |
||
569 | mov al,'(' |
||
570 | stos byte [edi] |
||
571 | call convert_expression |
||
572 | mov al,')' |
||
573 | stos byte [edi] |
||
574 | cmp byte [esi],':' |
||
575 | jne allow_embedded_instruction |
||
576 | movs byte [edi],[esi] |
||
577 | jmp allow_embedded_instruction |
||
578 | parse_label_directive: |
||
579 | cmp byte [esi],1Ah |
||
580 | jne argument_parsed |
||
581 | push esi |
||
582 | inc esi |
||
583 | movzx ecx,byte [esi] |
||
584 | inc esi |
||
585 | call identify_label |
||
586 | pop ebx |
||
587 | cmp eax,0Fh |
||
588 | je non_label_identified |
||
589 | mov byte [edi],2 |
||
590 | inc edi |
||
591 | stos dword [edi] |
||
592 | xor al,al |
||
593 | stos byte [edi] |
||
594 | jmp argument_parsed |
||
595 | non_label_identified: |
||
596 | mov esi,ebx |
||
597 | jmp argument_parsed |
||
598 | parse_load_directive: |
||
599 | cmp byte [esi],1Ah |
||
600 | jne argument_parsed |
||
601 | push esi |
||
602 | inc esi |
||
603 | movzx ecx,byte [esi] |
||
604 | inc esi |
||
605 | call get_label_id |
||
606 | pop ebx |
||
607 | cmp eax,0Fh |
||
608 | je non_label_identified |
||
609 | mov byte [edi],2 |
||
610 | inc edi |
||
611 | stos dword [edi] |
||
612 | xor al,al |
||
613 | stos byte [edi] |
||
614 | jmp argument_parsed |
||
615 | parse_public_directive: |
||
616 | cmp byte [esi],1Ah |
||
617 | jne parse_argument |
||
618 | inc esi |
||
619 | push esi |
||
620 | movzx ecx,byte [esi] |
||
621 | inc esi |
||
622 | push esi ecx |
||
623 | push edi |
||
624 | call get_symbol |
||
625 | pop edi |
||
626 | jc parse_public_label |
||
627 | cmp al,1Dh |
||
628 | jne parse_public_label |
||
629 | add esp,12 |
||
630 | stos word [edi] |
||
631 | jmp parse_public_directive |
||
632 | parse_public_label: |
||
633 | pop ecx esi |
||
634 | mov al,2 |
||
635 | stos byte [edi] |
||
636 | call get_label_id |
||
637 | stos dword [edi] |
||
638 | mov ax,8600h |
||
639 | stos word [edi] |
||
640 | pop ebx |
||
641 | push ebx esi edi |
||
642 | mov edi,directive_operators |
||
643 | call get_operator |
||
644 | pop edi edx ebx |
||
645 | cmp al,86h |
||
646 | je argument_parsed |
||
647 | mov esi,edx |
||
648 | xchg esi,ebx |
||
649 | movzx ecx,byte [esi] |
||
650 | inc esi |
||
651 | mov ax,'(' |
||
652 | stos word [edi] |
||
653 | mov eax,ecx |
||
654 | stos dword [edi] |
||
655 | rep movs byte [edi],[esi] |
||
656 | xor al,al |
||
657 | stos byte [edi] |
||
658 | xchg esi,ebx |
||
659 | jmp argument_parsed |
||
660 | parse_extrn_directive: |
||
661 | cmp byte [esi],22h |
||
662 | je parse_quoted_extrn |
||
663 | cmp byte [esi],1Ah |
||
664 | jne parse_argument |
||
665 | push esi |
||
666 | movzx ecx,byte [esi+1] |
||
667 | add esi,2 |
||
668 | mov ax,'(' |
||
669 | stos word [edi] |
||
670 | mov eax,ecx |
||
671 | stos dword [edi] |
||
672 | rep movs byte [edi],[esi] |
||
673 | mov ax,8600h |
||
674 | stos word [edi] |
||
675 | pop esi |
||
676 | parse_label_operator: |
||
677 | cmp byte [esi],1Ah |
||
678 | jne argument_parsed |
||
679 | inc esi |
||
680 | movzx ecx,byte [esi] |
||
681 | inc esi |
||
682 | mov al,2 |
||
683 | stos byte [edi] |
||
684 | call get_label_id |
||
685 | stos dword [edi] |
||
686 | xor al,al |
||
687 | stos byte [edi] |
||
688 | jmp argument_parsed |
||
689 | parse_from_operator: |
||
690 | cmp byte [esi],22h |
||
691 | jne forced_expression |
||
692 | jmp argument_parsed |
||
693 | parse_quoted_extrn: |
||
694 | inc esi |
||
695 | mov ax,'(' |
||
696 | stos word [edi] |
||
697 | lods dword [esi] |
||
698 | mov ecx,eax |
||
699 | stos dword [edi] |
||
700 | rep movs byte [edi],[esi] |
||
701 | xor al,al |
||
702 | stos byte [edi] |
||
703 | push esi edi |
||
704 | mov edi,directive_operators |
||
705 | call get_operator |
||
706 | mov edx,esi |
||
707 | pop edi esi |
||
708 | cmp al,86h |
||
709 | jne argument_parsed |
||
710 | stos byte [edi] |
||
711 | mov esi,edx |
||
712 | jmp parse_label_operator |
||
713 | ptr_argument: |
||
714 | call parse_address |
||
715 | jmp address_parsed |
||
716 | check_argument: |
||
717 | push esi ecx |
||
718 | sub esi,2 |
||
719 | mov edi,single_operand_operators |
||
720 | call get_operator |
||
721 | pop ecx esi |
||
722 | or al,al |
||
723 | jnz not_instruction |
||
724 | call get_instruction |
||
725 | jnc embedded_instruction |
||
726 | call get_data_directive |
||
727 | jnc embedded_instruction |
||
728 | not_instruction: |
||
729 | pop edi |
||
730 | sub esi,2 |
||
731 | expression_argument: |
||
732 | cmp byte [esi],22h |
||
733 | jne not_string |
||
734 | mov eax,[esi+1] |
||
735 | lea ebx,[esi+5+eax] |
||
736 | push ebx ecx esi edi |
||
737 | mov al,'(' |
||
738 | stos byte [edi] |
||
739 | call convert_expression |
||
740 | mov al,')' |
||
741 | stos byte [edi] |
||
742 | pop eax edx ecx ebx |
||
743 | cmp esi,ebx |
||
744 | jne expression_parsed |
||
745 | mov edi,eax |
||
746 | mov esi,edx |
||
747 | string_argument: |
||
748 | inc esi |
||
749 | mov ax,'(' |
||
750 | stos word [edi] |
||
751 | lods dword [esi] |
||
752 | mov ecx,eax |
||
753 | stos dword [edi] |
||
754 | shr ecx,1 |
||
755 | jnc string_movsb_ok |
||
756 | movs byte [edi],[esi] |
||
757 | string_movsb_ok: |
||
758 | shr ecx,1 |
||
759 | jnc string_movsw_ok |
||
760 | movs word [edi],[esi] |
||
761 | string_movsw_ok: |
||
762 | rep movs dword [edi],[esi] |
||
763 | xor al,al |
||
764 | stos byte [edi] |
||
765 | jmp expression_parsed |
||
766 | not_string: |
||
767 | cmp byte [esi],'(' |
||
768 | jne expression |
||
769 | mov eax,esp |
||
770 | sub eax,100h |
||
771 | jc stack_overflow |
||
772 | cmp eax,[stack_limit] |
||
773 | jb stack_overflow |
||
774 | push esi edi |
||
775 | inc esi |
||
776 | mov al,'{' |
||
777 | stos byte [edi] |
||
778 | inc [parenthesis_stack] |
||
779 | jmp parse_argument |
||
780 | expression: |
||
781 | mov al,'(' |
||
782 | stos byte [edi] |
||
783 | call convert_expression |
||
784 | mov al,')' |
||
785 | stos byte [edi] |
||
786 | jmp expression_parsed |
||
787 | forced_expression: |
||
788 | mov al,'(' |
||
789 | stos byte [edi] |
||
790 | call convert_expression |
||
791 | mov al,')' |
||
792 | stos byte [edi] |
||
793 | jmp argument_parsed |
||
794 | address_argument: |
||
795 | call parse_address |
||
796 | lods byte [esi] |
||
797 | cmp al,']' |
||
798 | je address_parsed |
||
799 | dec esi |
||
800 | mov al,')' |
||
801 | stos byte [edi] |
||
802 | jmp argument_parsed |
||
803 | address_parsed: |
||
804 | mov al,']' |
||
805 | stos byte [edi] |
||
806 | jmp argument_parsed |
||
807 | parse_address: |
||
808 | mov al,'[' |
||
809 | stos byte [edi] |
||
810 | cmp word [esi],021Ah |
||
811 | jne convert_address |
||
812 | push esi |
||
813 | add esi,4 |
||
814 | lea ebx,[esi+1] |
||
815 | cmp byte [esi],':' |
||
816 | pop esi |
||
817 | jne convert_address |
||
818 | add esi,2 |
||
819 | mov ecx,2 |
||
820 | push ebx edi |
||
821 | call get_symbol |
||
822 | pop edi esi |
||
823 | jc unknown_segment_prefix |
||
824 | cmp al,10h |
||
825 | jne unknown_segment_prefix |
||
826 | mov al,ah |
||
827 | and ah,11110000b |
||
828 | cmp ah,60h |
||
829 | jne unknown_segment_prefix |
||
830 | stos byte [edi] |
||
831 | jmp convert_address |
||
832 | unknown_segment_prefix: |
||
833 | sub esi,5 |
||
834 | convert_address: |
||
835 | push edi |
||
836 | mov edi,address_sizes |
||
837 | call get_operator |
||
838 | pop edi |
||
839 | or al,al |
||
840 | jz convert_expression |
||
841 | add al,70h |
||
842 | stos byte [edi] |
||
843 | jmp convert_expression |
||
844 | forced_parenthesis: |
||
845 | cmp byte [esi],'(' |
||
846 | jne argument_parsed |
||
847 | inc esi |
||
848 | mov al,'{' |
||
849 | jmp separator |
||
850 | unallowed_character: |
||
851 | mov al,0FFh |
||
852 | jmp separator |
||
853 | close_parenthesis: |
||
854 | mov al,'}' |
||
855 | separator: |
||
856 | stos byte [edi] |
||
857 | jmp argument_parsed |
||
858 | instruction_separator: |
||
859 | stos byte [edi] |
||
860 | jmp allow_embedded_instruction |
||
861 | greater: |
||
862 | cmp byte [esi],'=' |
||
863 | jne separator |
||
864 | inc esi |
||
865 | mov al,0F2h |
||
866 | jmp separator |
||
867 | less: |
||
868 | cmp byte [edi-1],0F6h |
||
869 | je separator |
||
870 | cmp byte [esi],'>' |
||
871 | je not_equal |
||
872 | cmp byte [esi],'=' |
||
873 | jne separator |
||
874 | inc esi |
||
875 | mov al,0F3h |
||
876 | jmp separator |
||
877 | not_equal: |
||
878 | inc esi |
||
879 | mov al,0F1h |
||
880 | jmp separator |
||
881 | argument_parsed: |
||
882 | cmp [parenthesis_stack],0 |
||
883 | je parse_argument |
||
884 | dec [parenthesis_stack] |
||
885 | add esp,8 |
||
886 | jmp argument_parsed |
||
887 | expression_parsed: |
||
888 | cmp [parenthesis_stack],0 |
||
889 | je parse_argument |
||
890 | cmp byte [esi],')' |
||
891 | jne argument_parsed |
||
892 | dec [parenthesis_stack] |
||
893 | pop edi esi |
||
894 | jmp expression |
||
895 | contents_parsed: |
||
896 | cmp [parenthesis_stack],0 |
||
897 | je contents_ok |
||
898 | dec [parenthesis_stack] |
||
899 | add esp,8 |
||
900 | jmp contents_parsed |
||
901 | contents_ok: |
||
902 | ret |
||
903 | |||
904 | |||
905 | cmp byte [esi],'.' |
||
906 | je local_label_name |
||
907 | call get_label_id |
||
908 | cmp eax,10h |
||
909 | jb label_identified |
||
910 | or ebx,ebx |
||
911 | jz anonymous_label_name |
||
912 | dec ebx |
||
913 | mov [current_locals_prefix],ebx |
||
914 | label_identified: |
||
915 | ret |
||
916 | anonymous_label_name: |
||
917 | cmp byte [esi-1],'@' |
||
918 | je anonymous_label_name_ok |
||
919 | mov eax,0Fh |
||
920 | anonymous_label_name_ok: |
||
921 | ret |
||
922 | local_label_name: |
||
923 | call get_label_id |
||
924 | ret |
||
925 | |||
926 | |||
927 | cmp byte [esi],1Ah |
||
928 | jne get_simple_operator |
||
929 | mov edx,esi |
||
930 | push ebp |
||
931 | inc esi |
||
932 | lods byte [esi] |
||
933 | movzx ebp,al |
||
934 | push edi |
||
935 | mov ecx,ebp |
||
936 | call lower_case |
||
937 | pop edi |
||
938 | check_operator: |
||
939 | mov esi,converted |
||
940 | movzx ecx,byte [edi] |
||
941 | jecxz no_operator |
||
942 | inc edi |
||
943 | mov ebx,edi |
||
944 | add ebx,ecx |
||
945 | cmp ecx,ebp |
||
946 | jne next_operator |
||
947 | repe cmps byte [esi],[edi] |
||
948 | je operator_found |
||
949 | next_operator: |
||
950 | mov edi,ebx |
||
951 | inc edi |
||
952 | jmp check_operator |
||
953 | no_operator: |
||
954 | mov esi,edx |
||
955 | mov ecx,ebp |
||
956 | pop ebp |
||
957 | no_simple_operator: |
||
958 | xor al,al |
||
959 | ret |
||
960 | operator_found: |
||
961 | lea esi,[edx+2+ebp] |
||
962 | mov ecx,ebp |
||
963 | pop ebp |
||
964 | mov al,[edi] |
||
965 | ret |
||
966 | get_simple_operator: |
||
967 | mov al,[esi] |
||
968 | cmp al,22h |
||
969 | je no_simple_operator |
||
970 | simple_operator: |
||
971 | cmp byte [edi],1 |
||
972 | jb no_simple_operator |
||
973 | ja simple_next_operator |
||
974 | cmp al,[edi+1] |
||
975 | je simple_operator_found |
||
976 | simple_next_operator: |
||
977 | movzx ecx,byte [edi] |
||
978 | lea edi,[edi+1+ecx+1] |
||
979 | jmp simple_operator |
||
980 | simple_operator_found: |
||
981 | inc esi |
||
982 | mov al,[edi+2] |
||
983 | ret |
||
984 | |||
985 | |||
986 | push esi |
||
987 | mov ebp,ecx |
||
988 | call lower_case |
||
989 | mov ecx,ebp |
||
990 | cmp cl,11 |
||
991 | ja no_symbol |
||
992 | sub cl,2 |
||
993 | jc no_symbol |
||
994 | movzx ebx,word [symbols+ecx*4] |
||
995 | add ebx,symbols |
||
996 | movzx edx,word [symbols+ecx*4+2] |
||
997 | scan_symbols: |
||
998 | or edx,edx |
||
999 | jz no_symbol |
||
1000 | mov eax,edx |
||
1001 | shr eax,1 |
||
1002 | lea edi,[ebp+2] |
||
1003 | imul eax,edi |
||
1004 | lea edi,[ebx+eax] |
||
1005 | mov esi,converted |
||
1006 | mov ecx,ebp |
||
1007 | repe cmps byte [esi],[edi] |
||
1008 | ja symbols_up |
||
1009 | jb symbols_down |
||
1010 | pop esi |
||
1011 | add esi,ebp |
||
1012 | mov ax,[edi] |
||
1013 | clc |
||
1014 | ret |
||
1015 | no_symbol: |
||
1016 | pop esi |
||
1017 | mov ecx,ebp |
||
1018 | stc |
||
1019 | ret |
||
1020 | symbols_down: |
||
1021 | shr edx,1 |
||
1022 | jmp scan_symbols |
||
1023 | symbols_up: |
||
1024 | lea ebx,[edi+ecx+2] |
||
1025 | shr edx,1 |
||
1026 | adc edx,-1 |
||
1027 | jmp scan_symbols |
||
1028 | |||
1029 | |||
1030 | push esi |
||
1031 | mov ebp,ecx |
||
1032 | call lower_case |
||
1033 | mov ecx,ebp |
||
1034 | cmp cl,4 |
||
1035 | ja no_instruction |
||
1036 | sub cl,2 |
||
1037 | jc no_instruction |
||
1038 | movzx ebx,word [data_directives+ecx*4] |
||
1039 | add ebx,data_directives |
||
1040 | movzx edx,word [data_directives+ecx*4+2] |
||
1041 | jmp scan_instructions |
||
1042 | |||
1043 | |||
1044 | push esi |
||
1045 | mov ebp,ecx |
||
1046 | call lower_case |
||
1047 | mov ecx,ebp |
||
1048 | cmp cl,11 |
||
1049 | ja no_instruction |
||
1050 | sub cl,2 |
||
1051 | jc no_instruction |
||
1052 | movzx ebx,word [instructions+ecx*4] |
||
1053 | add ebx,instructions |
||
1054 | movzx edx,word [instructions+ecx*4+2] |
||
1055 | scan_instructions: |
||
1056 | or edx,edx |
||
1057 | jz no_instruction |
||
1058 | mov eax,edx |
||
1059 | shr eax,1 |
||
1060 | lea edi,[ebp+3] |
||
1061 | imul eax,edi |
||
1062 | lea edi,[ebx+eax] |
||
1063 | mov esi,converted |
||
1064 | mov ecx,ebp |
||
1065 | repe cmps byte [esi],[edi] |
||
1066 | ja instructions_up |
||
1067 | jb instructions_down |
||
1068 | pop esi |
||
1069 | add esi,ebp |
||
1070 | mov al,[edi] |
||
1071 | mov bx,[edi+1] |
||
1072 | clc |
||
1073 | ret |
||
1074 | no_instruction: |
||
1075 | pop esi |
||
1076 | mov ecx,ebp |
||
1077 | stc |
||
1078 | ret |
||
1079 | instructions_down: |
||
1080 | shr edx,1 |
||
1081 | jmp scan_instructions |
||
1082 | instructions_up: |
||
1083 | lea ebx,[edi+ecx+3] |
||
1084 | shr edx,1 |
||
1085 | adc edx,-1 |
||
1086 | jmp scan_instructions |
||
1087 | |||
1088 | |||
1089 | cmp ecx,100h |
||
1090 | jae name_too_long |
||
1091 | cmp byte [esi],'@' |
||
1092 | je anonymous_label |
||
1093 | cmp byte [esi],'.' |
||
1094 | jne standard_label |
||
1095 | cmp byte [esi+1],'.' |
||
1096 | je standard_label |
||
1097 | cmp [current_locals_prefix],0 |
||
1098 | je standard_label |
||
1099 | push edi |
||
1100 | mov edi,[additional_memory_end] |
||
1101 | sub edi,2 |
||
1102 | sub edi,ecx |
||
1103 | push ecx esi |
||
1104 | mov esi,[current_locals_prefix] |
||
1105 | lods byte [esi] |
||
1106 | movzx ecx,al |
||
1107 | sub edi,ecx |
||
1108 | cmp edi,[free_additional_memory] |
||
1109 | jb out_of_memory |
||
1110 | mov word [edi],0 |
||
1111 | add edi,2 |
||
1112 | mov ebx,edi |
||
1113 | rep movs byte [edi],[esi] |
||
1114 | pop esi ecx |
||
1115 | add al,cl |
||
1116 | jc name_too_long |
||
1117 | rep movs byte [edi],[esi] |
||
1118 | pop edi |
||
1119 | push ebx esi |
||
1120 | movzx ecx,al |
||
1121 | mov byte [ebx-1],al |
||
1122 | mov esi,ebx |
||
1123 | call get_label_id |
||
1124 | pop esi ebx |
||
1125 | cmp ebx,[eax+24] |
||
1126 | jne composed_label_id_ok |
||
1127 | lea edx,[ebx-2] |
||
1128 | mov [additional_memory_end],edx |
||
1129 | composed_label_id_ok: |
||
1130 | ret |
||
1131 | anonymous_label: |
||
1132 | cmp ecx,2 |
||
1133 | jne standard_label |
||
1134 | mov al,[esi+1] |
||
1135 | mov ebx,characters |
||
1136 | xlat byte [ebx] |
||
1137 | cmp al,'@' |
||
1138 | je new_anonymous |
||
1139 | cmp al,'b' |
||
1140 | je anonymous_back |
||
1141 | cmp al,'r' |
||
1142 | je anonymous_back |
||
1143 | cmp al,'f' |
||
1144 | jne standard_label |
||
1145 | add esi,2 |
||
1146 | mov eax,[anonymous_forward] |
||
1147 | or eax,eax |
||
1148 | jnz anonymous_ok |
||
1149 | mov eax,[current_line] |
||
1150 | mov [error_line],eax |
||
1151 | call allocate_label |
||
1152 | mov [anonymous_forward],eax |
||
1153 | anonymous_ok: |
||
1154 | xor ebx,ebx |
||
1155 | ret |
||
1156 | anonymous_back: |
||
1157 | mov eax,[anonymous_reverse] |
||
1158 | or eax,eax |
||
1159 | jz new_anonymous |
||
1160 | add esi,2 |
||
1161 | jmp anonymous_ok |
||
1162 | new_anonymous: |
||
1163 | add esi,2 |
||
1164 | mov eax,[anonymous_forward] |
||
1165 | or eax,eax |
||
1166 | jnz new_anonymous_ok |
||
1167 | call allocate_label |
||
1168 | new_anonymous_ok: |
||
1169 | mov [anonymous_reverse],eax |
||
1170 | mov [anonymous_forward],0 |
||
1171 | jmp anonymous_ok |
||
1172 | standard_label: |
||
1173 | cmp byte [esi],'%' |
||
1174 | je get_predefined_id |
||
1175 | cmp byte [esi],'$' |
||
1176 | jne find_label |
||
1177 | cmp ecx,2 |
||
1178 | ja find_label |
||
1179 | inc esi |
||
1180 | jb get_current_offset_id |
||
1181 | inc esi |
||
1182 | cmp byte [esi-1],'$' |
||
1183 | je get_org_origin_id |
||
1184 | sub esi,ecx |
||
1185 | jmp find_label |
||
1186 | get_current_offset_id: |
||
1187 | xor eax,eax |
||
1188 | ret |
||
1189 | get_counter_id: |
||
1190 | mov eax,1 |
||
1191 | ret |
||
1192 | get_timestamp_id: |
||
1193 | mov eax,2 |
||
1194 | ret |
||
1195 | get_org_origin_id: |
||
1196 | mov eax,3 |
||
1197 | ret |
||
1198 | get_predefined_id: |
||
1199 | cmp ecx,2 |
||
1200 | ja find_label |
||
1201 | inc esi |
||
1202 | cmp cl,1 |
||
1203 | je get_counter_id |
||
1204 | lods byte [esi] |
||
1205 | mov ebx,characters |
||
1206 | xlat [ebx] |
||
1207 | cmp al,'t' |
||
1208 | je get_timestamp_id |
||
1209 | sub esi,2 |
||
1210 | find_label: |
||
1211 | xor ebx,ebx |
||
1212 | mov eax,2166136261 |
||
1213 | mov ebp,16777619 |
||
1214 | hash_label: |
||
1215 | xor al,[esi+ebx] |
||
1216 | mul ebp |
||
1217 | inc bl |
||
1218 | cmp bl,cl |
||
1219 | jb hash_label |
||
1220 | mov ebp,eax |
||
1221 | shl eax,8 |
||
1222 | and ebp,0FFh shl 24 |
||
1223 | xor ebp,eax |
||
1224 | or ebp,ebx |
||
1225 | mov [label_hash],ebp |
||
1226 | push edi esi |
||
1227 | push ecx |
||
1228 | mov ecx,32 |
||
1229 | mov ebx,hash_tree |
||
1230 | follow_tree: |
||
1231 | mov edx,[ebx] |
||
1232 | or edx,edx |
||
1233 | jz extend_tree |
||
1234 | xor eax,eax |
||
1235 | shl ebp,1 |
||
1236 | adc eax,0 |
||
1237 | lea ebx,[edx+eax*4] |
||
1238 | dec ecx |
||
1239 | jnz follow_tree |
||
1240 | mov [label_leaf],ebx |
||
1241 | pop edx |
||
1242 | mov eax,[ebx] |
||
1243 | or eax,eax |
||
1244 | jz add_label |
||
1245 | mov ebx,esi |
||
1246 | mov ebp,[label_hash] |
||
1247 | compare_labels: |
||
1248 | mov esi,ebx |
||
1249 | mov ecx,edx |
||
1250 | mov edi,[eax+4] |
||
1251 | mov edi,[edi+24] |
||
1252 | repe cmps byte [esi],[edi] |
||
1253 | je label_found |
||
1254 | mov eax,[eax] |
||
1255 | or eax,eax |
||
1256 | jnz compare_labels |
||
1257 | jmp add_label |
||
1258 | label_found: |
||
1259 | add esp,4 |
||
1260 | pop edi |
||
1261 | mov eax,[eax+4] |
||
1262 | ret |
||
1263 | extend_tree: |
||
1264 | mov edx,[free_additional_memory] |
||
1265 | lea eax,[edx+8] |
||
1266 | cmp eax,[additional_memory_end] |
||
1267 | ja out_of_memory |
||
1268 | mov [free_additional_memory],eax |
||
1269 | xor eax,eax |
||
1270 | mov [edx],eax |
||
1271 | mov [edx+4],eax |
||
1272 | shl ebp,1 |
||
1273 | adc eax,0 |
||
1274 | mov [ebx],edx |
||
1275 | lea ebx,[edx+eax*4] |
||
1276 | dec ecx |
||
1277 | jnz extend_tree |
||
1278 | mov [label_leaf],ebx |
||
1279 | pop edx |
||
1280 | add_label: |
||
1281 | mov ecx,edx |
||
1282 | pop esi |
||
1283 | cmp byte [esi-2],0 |
||
1284 | je label_name_ok |
||
1285 | mov al,[esi] |
||
1286 | cmp al,30h |
||
1287 | jb name_first_char_ok |
||
1288 | cmp al,39h |
||
1289 | jbe invalid_name |
||
1290 | name_first_char_ok: |
||
1291 | cmp al,'$' |
||
1292 | jne check_for_reserved_word |
||
1293 | cmp ecx,1 |
||
1294 | jne invalid_name |
||
1295 | reserved_word: |
||
1296 | mov eax,0Fh |
||
1297 | pop edi |
||
1298 | ret |
||
1299 | check_for_reserved_word: |
||
1300 | call get_instruction |
||
1301 | jnc reserved_word |
||
1302 | call get_data_directive |
||
1303 | jnc reserved_word |
||
1304 | call get_symbol |
||
1305 | jnc reserved_word |
||
1306 | sub esi,2 |
||
1307 | mov edi,operators |
||
1308 | call get_operator |
||
1309 | or al,al |
||
1310 | jnz reserved_word |
||
1311 | mov edi,single_operand_operators |
||
1312 | call get_operator |
||
1313 | or al,al |
||
1314 | jnz reserved_word |
||
1315 | mov edi,directive_operators |
||
1316 | call get_operator |
||
1317 | or al,al |
||
1318 | jnz reserved_word |
||
1319 | inc esi |
||
1320 | movzx ecx,byte [esi] |
||
1321 | inc esi |
||
1322 | label_name_ok: |
||
1323 | mov edx,[free_additional_memory] |
||
1324 | lea eax,[edx+8] |
||
1325 | cmp eax,[additional_memory_end] |
||
1326 | ja out_of_memory |
||
1327 | mov [free_additional_memory],eax |
||
1328 | mov ebx,esi |
||
1329 | add esi,ecx |
||
1330 | mov eax,[label_leaf] |
||
1331 | mov edi,[eax] |
||
1332 | mov [edx],edi |
||
1333 | mov [eax],edx |
||
1334 | call allocate_label |
||
1335 | mov [edx+4],eax |
||
1336 | mov [eax+24],ebx |
||
1337 | pop edi |
||
1338 | ret |
||
1339 | allocate_label: |
||
1340 | mov eax,[labels_list] |
||
1341 | mov ecx,LABEL_STRUCTURE_SIZE shr 2 |
||
1342 | initialize_label: |
||
1343 | sub eax,4 |
||
1344 | mov dword [eax],0 |
||
1345 | loop initialize_label |
||
1346 | mov [labels_list],eax |
||
1347 | ret |
||
1348 | |||
1349 | |||
1350 | > |