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atm959

Parts of main.asm

atm959
Aug 14th, 2020
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  1. extern clearScreen
  2. extern placeText
  3.  
  4. zeroDivideText:
  5. db "DIVIDE-BY-ZERO EXCEPTION", 0
  6.  
  7. zeroDivide:
  8. call copyState
  9. call clearScreen
  10. call dumpState
  11. push DWORD 0Ch
  12. push DWORD 0
  13. push DWORD 0
  14. mov eax, zeroDivideText
  15. push eax
  16. call placeText
  17. pop eax
  18. pop eax
  19. pop eax
  20. pop eax
  21. jmp halt
  22.  
  23. halt:
  24. cli
  25. hlt
  26.  
  27. eaxRAM: dd 0
  28. ebxRAM: dd 0
  29. ecxRAM: dd 0
  30. edxRAM: dd 0
  31. espRAM: dd 0
  32.  
  33. copyState:
  34. mov [eaxRAM], eax
  35. mov [ebxRAM], ebx
  36. mov [ecxRAM], ecx
  37. mov [edxRAM], edx
  38. mov [espRAM], esp
  39. ret
  40.  
  41. eaxText: db "EAX: ", 0
  42. ebxText: db "EBX: ", 0
  43. ecxText: db "ECX: ", 0
  44. edxText: db "EDX: ", 0
  45. espText: db "ESP: ", 0
  46. instructionAddressText: db "INSTRUCTION ADDRESS: ", 0
  47. stackTraceText: db "STACK TRACE: ", 0
  48.  
  49. extern print32Bit
  50.  
  51. dumpState:
  52. push DWORD 0Fh
  53. push DWORD 1
  54. push DWORD 0
  55. mov eax, eaxText
  56. push eax
  57. call placeText
  58. pop eax
  59. pop eax
  60. pop eax
  61. pop eax
  62. push DWORD 1
  63. push DWORD 5
  64. mov eax, [eaxRAM]
  65. push eax
  66. call print32Bit
  67. pop eax
  68. pop eax
  69. pop eax
  70.  
  71. push DWORD 0Fh
  72. push DWORD 2
  73. push DWORD 0
  74. mov eax, ebxText
  75. push eax
  76. call placeText
  77. pop eax
  78. pop eax
  79. pop eax
  80. pop eax
  81. push DWORD 2
  82. push DWORD 5
  83. mov eax, [ebxRAM]
  84. push eax
  85. call print32Bit
  86. pop eax
  87. pop eax
  88. pop eax
  89.  
  90. push DWORD 0Fh
  91. push DWORD 3
  92. push DWORD 0
  93. mov eax, ecxText
  94. push eax
  95. call placeText
  96. pop eax
  97. pop eax
  98. pop eax
  99. pop eax
  100. push DWORD 3
  101. push DWORD 5
  102. mov eax, [ecxRAM]
  103. push eax
  104. call print32Bit
  105. pop eax
  106. pop eax
  107. pop eax
  108.  
  109. push DWORD 0Fh
  110. push DWORD 4
  111. push DWORD 0
  112. mov eax, edxText
  113. push eax
  114. call placeText
  115. pop eax
  116. pop eax
  117. pop eax
  118. pop eax
  119. push DWORD 4
  120. push DWORD 5
  121. mov eax, [edxRAM]
  122. push eax
  123. call print32Bit
  124. pop eax
  125. pop eax
  126. pop eax
  127.  
  128. push DWORD 0Fh
  129. push DWORD 5
  130. push DWORD 0
  131. mov eax, espText
  132. push eax
  133. call placeText
  134. pop eax
  135. pop eax
  136. pop eax
  137. pop eax
  138. push DWORD 5
  139. push DWORD 5
  140. mov eax, [espRAM]
  141. push eax
  142. call print32Bit
  143. pop eax
  144. pop eax
  145. pop eax
  146.  
  147. push DWORD 0Fh
  148. push DWORD 6
  149. push DWORD 0
  150. mov eax, instructionAddressText
  151. push eax
  152. call placeText
  153. pop eax
  154. pop eax
  155. pop eax
  156. pop eax
  157.  
  158. push DWORD 0Fh
  159. push DWORD 8
  160. push DWORD 0
  161. mov eax, stackTraceText
  162. push eax
  163. call placeText
  164. pop eax
  165. pop eax
  166. pop eax
  167. pop eax
  168. ret
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