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Rev | Author | Line No. | Line |
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145 | halyavin | 1 | format ELF |
2 | section '.text' executable |
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3 | public start |
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4 | extrn mf_init |
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5 | extrn main |
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6 | ;include 'debug2.inc' |
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7 | __DEBUG__=0 |
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8 | virtual at 0 |
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9 | db 'MENUET01' ; 1. Magic number (8 bytes) |
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10 | dd 0x01 ; 2. Version of executable file |
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11 | dd 0x0 ; 3. Start address |
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12 | dd 0x0 ; 4. Size of image |
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13 | dd 0x100000 ; 5. Size of needed memory |
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14 | dd 0x100000 ; 6. Pointer to stack |
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15 | hparams dd 0x0 ; 7. Pointer to program arguments |
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16 | hpath dd 0x0 ; 8. Pointer to program path |
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17 | end virtual |
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18 | start: |
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19 | ;DEBUGF 'Start programm\n' |
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20 | xor eax,eax |
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21 | call mf_init |
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22 | ;DEBUGF ' path "%s"\n params "%s"\n', .path, .params |
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23 | ; check for overflow |
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24 | mov al, [path+buf_len-1] |
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25 | or al, [params+buf_len-1] |
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26 | jnz .crash |
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27 | ; check if path written by OS |
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28 | mov eax, [hparams] |
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29 | test eax, eax |
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30 | jz .without_path |
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31 | mov eax, path |
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32 | .without_path: |
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33 | mov esi, eax |
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34 | call push_param |
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35 | ; retrieving parameters |
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36 | mov esi, params |
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37 | xor edx, edx ; dl - идёт параметр(1) или разделители(0) |
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38 | ; dh - символ с которого начался параметр (1 кавычки, 0 остальное) |
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39 | mov ecx, 1 ; cl = 1 |
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40 | ; ch = 0 просто ноль |
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41 | .parse: |
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42 | lodsb |
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43 | test al, al |
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44 | jz .run |
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45 | test dl, dl |
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46 | jnz .findendparam |
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47 | ;{если был разделитель |
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48 | cmp al, ' ' |
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49 | jz .parse ;загружен пробел, грузим следующий символ |
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50 | mov dl, cl ;начинается параметр |
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51 | cmp al, '"' |
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52 | jz @f ;загружены кавычки |
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53 | mov dh, ch ;параметр без кавычек |
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54 | dec esi |
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55 | call push_param |
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56 | inc esi |
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57 | jmp .parse |
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58 | |||
59 | @@: |
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60 | mov dh, cl ;параметр в кавычеках |
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61 | call push_param ;если не пробел значит начинается какой то параметр |
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62 | jmp .parse ;если был разделитель} |
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63 | |||
64 | .findendparam: |
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65 | test dh, dh |
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66 | jz @f ; без кавычек |
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67 | cmp al, '"' |
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68 | jz .clear |
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69 | jmp .parse |
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70 | @@: |
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71 | cmp al, ' ' |
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72 | jnz .parse |
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73 | |||
74 | .clear: |
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75 | lea ebx, [esi - 1] |
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76 | mov [ebx], ch |
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77 | mov dl, ch |
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78 | jmp .parse |
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79 | |||
80 | .run: |
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81 | ;DEBUGF 'call main(%x, %x) with params:\n', [argc], argv |
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82 | if __DEBUG__ = 1 |
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83 | mov ecx, [argc] |
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84 | @@: |
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85 | lea esi, [ecx * 4 + argv-4] |
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86 | DEBUGF '0x%x) "%s"\n', cx, [esi] |
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87 | loop @b |
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88 | end if |
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89 | push [argc] |
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90 | push argv |
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91 | call main |
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92 | .exit: |
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93 | ;DEBUGF 'Exit from prog\n'; |
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94 | xor eax,eax |
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95 | dec eax |
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96 | int 0x40 |
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97 | dd -1 |
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98 | .crash: |
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99 | ;DEBUGF 'E:buffer overflowed\n' |
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100 | jmp .exit |
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101 | ;============================ |
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102 | push_param: |
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103 | ;============================ |
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104 | ;parameters |
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105 | ; esi - pointer |
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106 | ;description |
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107 | ; procedure increase argc |
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108 | ; and add pointer to array argv |
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109 | ; procedure changes ebx |
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110 | mov ebx, [argc] |
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111 | cmp ebx, max_parameters |
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112 | jae .dont_add |
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113 | mov [argv+4*ebx], esi |
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114 | inc [argc] |
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115 | .dont_add: |
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116 | ret |
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117 | ;============================== |
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118 | public params as '__argv' |
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119 | public path as '__path' |
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120 | |||
121 | section '.bss' |
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122 | buf_len = 0x400 |
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123 | max_parameters=0x20 |
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124 | argc rd 1 |
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125 | argv rd max_parameters |
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126 | path rb buf_len |
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127 | params rb buf_len |
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128 | |||
129 | ;section '.data' |
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130 | ;include_debug_strings ; ALWAYS present in data section |