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