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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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6424 | siemargl | 4 | public start as '_start' |
5 | ;extrn mf_init |
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145 | halyavin | 6 | extrn main |
6424 | siemargl | 7 | ;include 'debug2.inc' |
8 | __DEBUG__=0 |
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215 | victor | 9 | |
6424 | siemargl | 10 | ;start_: |
145 | halyavin | 11 | virtual at 0 |
215 | victor | 12 | db 'MENUET01' ; 1. Magic number (8 bytes) |
13 | dd 0x01 ; 2. Version of executable file |
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6424 | siemargl | 14 | dd start ; 3. Start address |
215 | victor | 15 | dd 0x0 ; 4. Size of image |
16 | dd 0x100000 ; 5. Size of needed memory |
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17 | dd 0x100000 ; 6. Pointer to stack |
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18 | hparams dd 0x0 ; 7. Pointer to program arguments |
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19 | hpath dd 0x0 ; 8. Pointer to program path |
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145 | halyavin | 20 | end virtual |
6424 | siemargl | 21 | |
145 | halyavin | 22 | start: |
6424 | siemargl | 23 | ;DEBUGF 'Start programm\n' |
24 | ;init heap of memory |
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25 | mov eax,68 |
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26 | mov ebx,11 |
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27 | int 0x40 |
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28 | |||
29 | ;DEBUGF ' path "%s"\n params "%s"\n', .path, .params |
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145 | halyavin | 30 | ; check for overflow |
31 | mov al, [path+buf_len-1] |
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215 | victor | 32 | or al, [params+buf_len-1] |
145 | halyavin | 33 | jnz .crash |
34 | ; check if path written by OS |
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35 | mov eax, [hparams] |
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36 | test eax, eax |
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215 | victor | 37 | jz .without_path |
145 | halyavin | 38 | mov eax, path |
39 | .without_path: |
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40 | mov esi, eax |
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41 | call push_param |
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42 | ; retrieving parameters |
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43 | mov esi, params |
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44 | xor edx, edx ; dl - идёт параметр(1) или разделители(0) |
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215 | victor | 45 | ; dh - символ с которого начался параметр (1 кавычки, 0 остальное) |
145 | halyavin | 46 | mov ecx, 1 ; cl = 1 |
215 | victor | 47 | ; ch = 0 просто ноль |
145 | halyavin | 48 | .parse: |
49 | lodsb |
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50 | test al, al |
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215 | victor | 51 | jz .run |
145 | halyavin | 52 | test dl, dl |
53 | jnz .findendparam |
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215 | victor | 54 | ;{если был разделитель |
145 | halyavin | 55 | cmp al, ' ' |
215 | victor | 56 | jz .parse ;загружен пробел, грузим следующий символ |
145 | halyavin | 57 | mov dl, cl ;начинается параметр |
58 | cmp al, '"' |
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215 | victor | 59 | jz @f ;загружены кавычки |
145 | halyavin | 60 | mov dh, ch ;параметр без кавычек |
61 | dec esi |
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62 | call push_param |
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63 | inc esi |
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64 | jmp .parse |
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65 | |||
66 | @@: |
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67 | mov dh, cl ;параметр в кавычеках |
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68 | call push_param ;если не пробел значит начинается какой то параметр |
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69 | jmp .parse ;если был разделитель} |
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70 | |||
71 | .findendparam: |
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72 | test dh, dh |
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215 | victor | 73 | jz @f ; без кавычек |
145 | halyavin | 74 | cmp al, '"' |
215 | victor | 75 | jz .clear |
145 | halyavin | 76 | jmp .parse |
77 | @@: |
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78 | cmp al, ' ' |
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79 | jnz .parse |
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80 | |||
81 | .clear: |
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82 | lea ebx, [esi - 1] |
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83 | mov [ebx], ch |
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84 | mov dl, ch |
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85 | jmp .parse |
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86 | |||
87 | .run: |
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6424 | siemargl | 88 | ;DEBUGF 'call main(%x, %x) with params:\n', [argc], argv |
145 | halyavin | 89 | if __DEBUG__ = 1 |
90 | mov ecx, [argc] |
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91 | @@: |
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92 | lea esi, [ecx * 4 + argv-4] |
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6424 | siemargl | 93 | DEBUGF '0x%x) "%s"\n', cx, [esi] |
145 | halyavin | 94 | loop @b |
95 | end if |
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215 | victor | 96 | push argv |
145 | halyavin | 97 | push [argc] |
98 | call main |
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99 | .exit: |
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6424 | siemargl | 100 | ;DEBUGF 'Exit from prog\n'; |
145 | halyavin | 101 | xor eax,eax |
102 | dec eax |
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103 | int 0x40 |
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215 | victor | 104 | dd -1 |
145 | halyavin | 105 | .crash: |
6424 | siemargl | 106 | ;DEBUGF 'E:buffer overflowed\n' |
145 | halyavin | 107 | jmp .exit |
108 | ;============================ |
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109 | push_param: |
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110 | ;============================ |
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111 | ;parameters |
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112 | ; esi - pointer |
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113 | ;description |
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114 | ; procedure increase argc |
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115 | ; and add pointer to array argv |
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116 | ; procedure changes ebx |
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117 | mov ebx, [argc] |
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118 | cmp ebx, max_parameters |
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119 | jae .dont_add |
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120 | mov [argv+4*ebx], esi |
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121 | inc [argc] |
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122 | .dont_add: |
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123 | ret |
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124 | ;============================== |
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6424 | siemargl | 125 | public argc as '__argc' |
145 | halyavin | 126 | public params as '__argv' |
127 | public path as '__path' |
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128 | |||
129 | section '.bss' |
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130 | buf_len = 0x400 |
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131 | max_parameters=0x20 |
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215 | victor | 132 | argc rd 1 |
133 | argv rd max_parameters |
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134 | path rb buf_len |
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135 | params rb buf_len |
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145 | halyavin | 136 | |
6424 | siemargl | 137 | ;section '.data' |
138 | ;include_debug_strings ; ALWAYS present in data section |