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Rev | Author | Line No. | Line |
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2288 | clevermous | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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2455 | mario79 | 3 | ;; Copyright (C) KolibriOS team 2004-2012. All rights reserved. ;; |
2288 | clevermous | 4 | ;; Distributed under terms of the GNU General Public License ;; |
5 | ;; ;; |
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6 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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7 | |||
8 | $Revision: 2455 $ |
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9 | |||
10 | |||
11 | align 4 |
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12 | proc alloc_page |
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13 | |||
14 | pushfd |
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15 | cli |
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16 | push ebx |
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17 | ;//- |
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18 | cmp [pg_data.pages_free], 1 |
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19 | jle .out_of_memory |
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20 | ;//- |
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21 | |||
22 | mov ebx, [page_start] |
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23 | mov ecx, [page_end] |
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24 | .l1: |
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25 | bsf eax, [ebx]; |
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26 | jnz .found |
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27 | add ebx, 4 |
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28 | cmp ebx, ecx |
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29 | jb .l1 |
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30 | pop ebx |
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31 | popfd |
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32 | xor eax, eax |
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33 | ret |
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34 | .found: |
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35 | ;//- |
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36 | dec [pg_data.pages_free] |
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37 | jz .out_of_memory |
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38 | ;//- |
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39 | btr [ebx], eax |
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40 | mov [page_start], ebx |
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41 | sub ebx, sys_pgmap |
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42 | lea eax, [eax+ebx*8] |
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43 | shl eax, 12 |
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44 | ;//- dec [pg_data.pages_free] |
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45 | pop ebx |
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46 | popfd |
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47 | ret |
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48 | ;//- |
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49 | .out_of_memory: |
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50 | mov [pg_data.pages_free], 1 |
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51 | xor eax, eax |
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52 | pop ebx |
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53 | popfd |
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54 | ret |
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55 | ;//- |
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56 | endp |
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57 | |||
58 | align 4 |
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59 | proc alloc_pages stdcall, count:dword |
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60 | pushfd |
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61 | push ebx |
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62 | push edi |
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63 | cli |
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64 | mov eax, [count] |
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65 | add eax, 7 |
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66 | shr eax, 3 |
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67 | mov [count], eax |
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68 | ;//- |
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69 | mov ebx, [pg_data.pages_free] |
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70 | sub ebx, 9 |
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71 | js .out_of_memory |
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72 | shr ebx, 3 |
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73 | cmp eax, ebx |
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74 | jg .out_of_memory |
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75 | ;//- |
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76 | mov ecx, [page_start] |
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77 | mov ebx, [page_end] |
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78 | .find: |
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79 | mov edx, [count] |
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80 | mov edi, ecx |
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81 | .match: |
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82 | cmp byte [ecx], 0xFF |
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83 | jne .next |
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84 | dec edx |
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85 | jz .ok |
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86 | inc ecx |
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87 | cmp ecx, ebx |
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88 | jb .match |
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89 | .out_of_memory: |
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90 | .fail: |
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91 | xor eax, eax |
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92 | pop edi |
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93 | pop ebx |
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94 | popfd |
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95 | ret |
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96 | .next: |
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97 | inc ecx |
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98 | cmp ecx, ebx |
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99 | jb .find |
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100 | pop edi |
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101 | pop ebx |
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102 | popfd |
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103 | xor eax, eax |
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104 | ret |
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105 | .ok: |
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106 | sub ecx, edi |
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107 | inc ecx |
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108 | push esi |
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109 | mov esi, edi |
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110 | xor eax, eax |
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111 | rep stosb |
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112 | sub esi, sys_pgmap |
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113 | shl esi, 3+12 |
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114 | mov eax, esi |
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115 | mov ebx, [count] |
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116 | shl ebx, 3 |
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117 | sub [pg_data.pages_free], ebx |
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118 | pop esi |
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119 | pop edi |
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120 | pop ebx |
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121 | popfd |
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122 | ret |
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123 | endp |
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124 | |||
125 | align 4 |
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126 | proc map_page stdcall,lin_addr:dword,phis_addr:dword,flags:dword |
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127 | push ebx |
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128 | mov eax, [phis_addr] |
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129 | and eax, not 0xFFF |
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130 | or eax, [flags] |
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131 | mov ebx, [lin_addr] |
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132 | shr ebx, 12 |
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133 | mov [page_tabs+ebx*4], eax |
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134 | mov eax, [lin_addr] |
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135 | invlpg [eax] |
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136 | pop ebx |
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137 | ret |
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138 | endp |
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139 | |||
140 | align 4 |
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141 | map_space: ;not implemented |
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142 | |||
143 | |||
144 | ret |
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145 | |||
146 | |||
147 | align 4 |
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148 | proc free_page |
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149 | ;arg: eax page address |
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150 | pushfd |
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151 | cli |
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152 | shr eax, 12 ;page index |
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153 | bts dword [sys_pgmap], eax ;that's all! |
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154 | cmc |
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155 | adc [pg_data.pages_free], 0 |
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156 | shr eax, 3 |
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157 | and eax, not 3 ;dword offset from page_map |
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158 | add eax, sys_pgmap |
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159 | cmp [page_start], eax |
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160 | ja @f |
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161 | popfd |
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162 | ret |
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163 | @@: |
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164 | mov [page_start], eax |
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165 | popfd |
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166 | ret |
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167 | endp |
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168 | |||
2414 | Serge | 169 | align 4 |
2288 | clevermous | 170 | proc map_io_mem stdcall, base:dword, size:dword, flags:dword |
171 | |||
172 | push ebx |
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173 | push edi |
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174 | mov eax, [size] |
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175 | add eax, [base] |
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176 | add eax, 4095 |
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177 | and eax, -4096 |
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178 | mov ecx, [base] |
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179 | and ecx, -4096 |
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180 | sub eax, ecx |
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181 | mov [size], eax |
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182 | |||
183 | stdcall alloc_kernel_space, eax |
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184 | test eax, eax |
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185 | jz .fail |
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186 | push eax |
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187 | |||
188 | mov edi, 0x1000 |
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189 | mov ebx, eax |
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190 | mov ecx, [size] |
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191 | mov edx, [base] |
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192 | shr eax, 12 |
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193 | shr ecx, 12 |
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194 | and edx, -4096 |
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195 | or edx, [flags] |
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196 | @@: |
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197 | mov [page_tabs+eax*4], edx |
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198 | invlpg [ebx] |
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199 | inc eax |
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200 | add ebx, edi |
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201 | add edx, edi |
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202 | loop @B |
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203 | |||
204 | pop eax |
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205 | mov edx, [base] |
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206 | and edx, 4095 |
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207 | add eax, edx |
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208 | .fail: |
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209 | pop edi |
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210 | pop ebx |
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211 | ret |
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212 | endp |
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213 | |||
214 | ; param |
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215 | ; eax= page base + page flags |
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216 | ; ebx= linear address |
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217 | ; ecx= count |
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218 | |||
219 | align 4 |
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220 | commit_pages: |
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221 | test ecx, ecx |
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222 | jz .fail |
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223 | |||
224 | push edi |
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225 | push eax |
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226 | push ecx |
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227 | mov ecx, pg_data.mutex |
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228 | call mutex_lock |
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229 | pop ecx |
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230 | pop eax |
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231 | |||
232 | mov edi, ebx |
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233 | shr edi, 12 |
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234 | lea edi, [page_tabs+edi*4] |
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235 | @@: |
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236 | stosd |
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237 | invlpg [ebx] |
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238 | add eax, 0x1000 |
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239 | add ebx, 0x1000 |
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240 | loop @B |
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241 | |||
242 | pop edi |
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243 | |||
244 | mov ecx, pg_data.mutex |
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245 | call mutex_unlock |
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246 | .fail: |
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247 | ret |
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248 | |||
249 | |||
250 | ; param |
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251 | ; eax= base |
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252 | ; ecx= count |
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253 | |||
254 | align 4 |
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255 | release_pages: |
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256 | |||
257 | push ebp |
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258 | push esi |
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259 | push edi |
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260 | push ebx |
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261 | |||
262 | mov esi, eax |
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263 | mov edi, eax |
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264 | |||
265 | shr esi, 12 |
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266 | lea esi, [page_tabs+esi*4] |
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267 | |||
268 | push ecx |
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269 | mov ecx, pg_data.mutex |
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270 | call mutex_lock |
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271 | pop ecx |
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272 | |||
273 | mov ebp, [pg_data.pages_free] |
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274 | mov ebx, [page_start] |
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275 | mov edx, sys_pgmap |
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276 | @@: |
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277 | xor eax, eax |
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278 | xchg eax, [esi] |
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279 | invlpg [edi] |
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280 | |||
281 | test eax, 1 |
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282 | jz .next |
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283 | |||
284 | shr eax, 12 |
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285 | bts [edx], eax |
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286 | cmc |
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287 | adc ebp, 0 |
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288 | shr eax, 3 |
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289 | and eax, -4 |
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290 | add eax, edx |
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291 | cmp eax, ebx |
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292 | jae .next |
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293 | |||
294 | mov ebx, eax |
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295 | .next: |
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296 | add edi, 0x1000 |
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297 | add esi, 4 |
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298 | loop @B |
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299 | |||
300 | mov [pg_data.pages_free], ebp |
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301 | mov ecx, pg_data.mutex |
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302 | call mutex_unlock |
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303 | |||
304 | pop ebx |
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305 | pop edi |
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306 | pop esi |
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307 | pop ebp |
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308 | ret |
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309 | |||
310 | ; param |
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311 | ; eax= base |
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312 | ; ecx= count |
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313 | |||
314 | align 4 |
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315 | unmap_pages: |
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316 | |||
317 | push edi |
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318 | |||
319 | mov edi, eax |
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320 | mov edx, eax |
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321 | |||
322 | shr edi, 10 |
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323 | add edi, page_tabs |
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324 | |||
325 | xor eax, eax |
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326 | @@: |
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327 | stosd |
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328 | invlpg [edx] |
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329 | add edx, 0x1000 |
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330 | loop @b |
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331 | |||
332 | pop edi |
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333 | ret |
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334 | |||
335 | |||
336 | align 4 |
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337 | proc map_page_table stdcall, lin_addr:dword, phis_addr:dword |
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338 | push ebx |
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339 | mov ebx, [lin_addr] |
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340 | shr ebx, 22 |
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341 | mov eax, [phis_addr] |
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342 | and eax, not 0xFFF |
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343 | or eax, PG_UW ;+PG_NOCACHE |
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344 | mov dword [master_tab+ebx*4], eax |
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345 | mov eax, [lin_addr] |
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346 | shr eax, 10 |
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347 | add eax, page_tabs |
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348 | invlpg [eax] |
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349 | pop ebx |
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350 | ret |
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351 | endp |
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352 | |||
353 | align 4 |
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354 | proc init_LFB |
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355 | locals |
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356 | pg_count dd ? |
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357 | endl |
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358 | |||
359 | cmp dword [LFBAddress], -1 |
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360 | jne @f |
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361 | mov [BOOT_VAR+0x901c], byte 2 |
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2398 | mario79 | 362 | ; max VGA=640*480*4=1228800 bytes |
363 | ; + 32*640*4=81920 bytes for mouse pointer |
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364 | stdcall alloc_pages, ((1228800+81920)/4096) |
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2288 | clevermous | 365 | |
366 | push eax |
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367 | call alloc_page |
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368 | stdcall map_page_table, LFB_BASE, eax |
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369 | pop eax |
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370 | or eax, PG_UW |
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371 | mov ebx, LFB_BASE |
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2398 | mario79 | 372 | ; max VGA=640*480*4=1228800 bytes |
373 | ; + 32*640*4=81920 bytes for mouse pointer |
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374 | mov ecx, (1228800+81920)/4096 |
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2288 | clevermous | 375 | call commit_pages |
376 | mov [LFBAddress], dword LFB_BASE |
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377 | ret |
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378 | @@: |
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379 | test [SCR_MODE], word 0100000000000000b |
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380 | jnz @f |
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381 | mov [BOOT_VAR+0x901c], byte 2 |
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382 | ret |
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383 | @@: |
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384 | call init_mtrr |
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385 | |||
386 | mov edx, LFB_BASE |
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387 | mov esi, [LFBAddress] |
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388 | mov edi, 0x00C00000 |
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389 | mov dword [exp_lfb+4], edx |
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390 | |||
391 | shr edi, 12 |
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392 | mov [pg_count], edi |
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393 | shr edi, 10 |
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394 | |||
395 | bt [cpu_caps], CAPS_PSE |
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396 | jnc .map_page_tables |
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397 | or esi, PG_LARGE+PG_UW |
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398 | mov edx, sys_pgdir+(LFB_BASE shr 20) |
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399 | @@: |
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400 | mov [edx], esi |
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401 | add edx, 4 |
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402 | add esi, 0x00400000 |
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403 | dec edi |
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404 | jnz @B |
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405 | |||
406 | bt [cpu_caps], CAPS_PGE |
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407 | jnc @F |
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408 | or dword [sys_pgdir+(LFB_BASE shr 20)], PG_GLOBAL |
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409 | @@: |
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410 | mov dword [LFBAddress], LFB_BASE |
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411 | mov eax, cr3 ;flush TLB |
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412 | mov cr3, eax |
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413 | ret |
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414 | |||
415 | .map_page_tables: |
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416 | |||
417 | @@: |
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418 | call alloc_page |
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419 | stdcall map_page_table, edx, eax |
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420 | add edx, 0x00400000 |
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421 | dec edi |
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422 | jnz @B |
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423 | |||
424 | mov eax, [LFBAddress] |
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425 | mov edi, page_tabs + (LFB_BASE shr 10) |
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426 | or eax, PG_UW |
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427 | mov ecx, [pg_count] |
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428 | cld |
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429 | @@: |
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430 | stosd |
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431 | add eax, 0x1000 |
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432 | dec ecx |
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433 | jnz @B |
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434 | |||
435 | mov dword [LFBAddress], LFB_BASE |
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436 | mov eax, cr3 ;flush TLB |
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437 | mov cr3, eax |
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438 | |||
439 | ret |
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440 | endp |
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441 | |||
442 | align 4 |
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443 | proc new_mem_resize stdcall, new_size:dword |
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444 | |||
445 | mov ecx, pg_data.mutex |
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446 | call mutex_lock |
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447 | |||
448 | mov edi, [new_size] |
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449 | add edi, 4095 |
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450 | and edi, not 4095 |
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451 | mov [new_size], edi |
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452 | |||
453 | mov edx, [current_slot] |
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454 | cmp [edx+APPDATA.heap_base], 0 |
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455 | jne .exit |
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456 | |||
457 | mov esi, [edx+APPDATA.mem_size] |
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458 | add esi, 4095 |
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459 | and esi, not 4095 |
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460 | |||
461 | cmp edi, esi |
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462 | jae .expand |
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463 | |||
464 | shr edi, 12 |
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465 | shr esi, 12 |
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466 | @@: |
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467 | mov eax, [app_page_tabs+edi*4] |
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468 | test eax, 1 |
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469 | jz .next |
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470 | mov dword [app_page_tabs+edi*4], 2 |
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471 | mov ebx, edi |
||
472 | shl ebx, 12 |
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473 | push eax |
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474 | invlpg [ebx] |
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475 | pop eax |
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476 | call free_page |
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477 | |||
478 | .next: |
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479 | add edi, 1 |
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480 | cmp edi, esi |
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481 | jb @B |
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482 | |||
483 | .update_size: |
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484 | mov ebx, [new_size] |
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485 | call update_mem_size |
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486 | |||
487 | mov ecx, pg_data.mutex |
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488 | call mutex_unlock |
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489 | |||
490 | xor eax, eax |
||
491 | ret |
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492 | .expand: |
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493 | |||
494 | push esi |
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495 | push edi |
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496 | |||
497 | add edi, 0x3FFFFF |
||
498 | and edi, not(0x3FFFFF) |
||
499 | add esi, 0x3FFFFF |
||
500 | and esi, not(0x3FFFFF) |
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501 | |||
502 | cmp esi, edi |
||
503 | jae .grow |
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504 | |||
505 | xchg esi, edi |
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506 | |||
507 | @@: |
||
508 | call alloc_page |
||
509 | test eax, eax |
||
510 | jz .exit_pop |
||
511 | |||
512 | stdcall map_page_table, edi, eax |
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513 | |||
514 | push edi |
||
515 | shr edi, 10 |
||
516 | add edi, page_tabs |
||
517 | mov ecx, 1024 |
||
518 | xor eax, eax |
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519 | cld |
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520 | rep stosd |
||
521 | pop edi |
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522 | |||
523 | add edi, 0x00400000 |
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524 | cmp edi, esi |
||
525 | jb @B |
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526 | .grow: |
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527 | ;//- |
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528 | pop edi |
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529 | push edi |
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530 | mov esi, [pg_data.pages_free] |
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531 | sub esi, 1 |
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532 | shr edi, 12 |
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533 | cmp esi, edi |
||
534 | jle .out_of_memory |
||
535 | ;//- |
||
536 | pop edi |
||
537 | pop esi |
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538 | @@: |
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539 | call alloc_page |
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540 | test eax, eax |
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541 | jz .exit |
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542 | stdcall map_page, esi, eax, dword PG_UW |
||
543 | |||
544 | push edi |
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545 | mov edi, esi |
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546 | xor eax, eax |
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547 | mov ecx, 1024 |
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548 | cld |
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549 | rep stosd |
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550 | pop edi |
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551 | |||
552 | add esi, 0x1000 |
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553 | cmp esi, edi |
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554 | jb @B |
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555 | |||
556 | jmp .update_size |
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557 | ;//- |
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558 | .exit_pop: |
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559 | .out_of_memory: |
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560 | ;//- |
||
561 | pop edi |
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562 | pop esi |
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563 | .exit: |
||
564 | mov ecx, pg_data.mutex |
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565 | call mutex_unlock |
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566 | |||
567 | xor eax, eax |
||
568 | inc eax |
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569 | ret |
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570 | endp |
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571 | |||
572 | update_mem_size: |
||
573 | ; in: edx = slot base |
||
574 | ; ebx = new memory size |
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575 | ; destroys eax,ecx,edx |
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576 | |||
577 | mov [APPDATA.mem_size+edx], ebx |
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578 | ;search threads and update |
||
579 | ;application memory size infomation |
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580 | mov ecx, [APPDATA.dir_table+edx] |
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581 | mov eax, 2 |
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582 | |||
583 | .search_threads: |
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584 | ;eax = current slot |
||
585 | ;ebx = new memory size |
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586 | ;ecx = page directory |
||
587 | cmp eax, [TASK_COUNT] |
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588 | jg .search_threads_end |
||
589 | mov edx, eax |
||
590 | shl edx, 5 |
||
591 | cmp word [CURRENT_TASK+edx+TASKDATA.state], 9 ;if slot empty? |
||
592 | jz .search_threads_next |
||
593 | shl edx, 3 |
||
594 | cmp [SLOT_BASE+edx+APPDATA.dir_table], ecx ;if it is our thread? |
||
595 | jnz .search_threads_next |
||
596 | mov [SLOT_BASE+edx+APPDATA.mem_size], ebx ;update memory size |
||
597 | .search_threads_next: |
||
598 | inc eax |
||
599 | jmp .search_threads |
||
600 | .search_threads_end: |
||
601 | ret |
||
602 | |||
603 | ; param |
||
604 | ; eax= linear address |
||
605 | ; |
||
606 | ; retval |
||
607 | ; eax= phisical page address |
||
608 | |||
609 | align 4 |
||
610 | get_pg_addr: |
||
611 | shr eax, 12 |
||
612 | mov eax, [page_tabs+eax*4] |
||
613 | and eax, 0xFFFFF000 |
||
614 | ret |
||
615 | |||
616 | |||
617 | align 4 |
||
618 | ; Now it is called from core/sys32::exc_c (see stack frame there) |
||
619 | proc page_fault_handler |
||
620 | |||
621 | .err_addr equ ebp-4 |
||
622 | |||
623 | push ebx ;save exception number (#PF) |
||
624 | mov ebp, esp |
||
625 | mov ebx, cr2 |
||
626 | push ebx ;that is locals: .err_addr = cr2 |
||
627 | inc [pg_data.pages_faults] |
||
628 | |||
629 | mov eax, [pf_err_code] |
||
630 | |||
631 | cmp ebx, OS_BASE ;ebx == .err_addr |
||
632 | jb .user_space ;ñòðàíèöà â ïàìÿòè ïðèëîæåíèÿ ; |
||
633 | |||
634 | cmp ebx, page_tabs |
||
635 | jb .kernel_space ;ñòðàíèöà â ïàìÿòè ÿäðà |
||
636 | |||
637 | cmp ebx, kernel_tabs |
||
638 | jb .alloc;.app_tabs ;òàáëèöû ñòðàíèö ïðèëîæåíèÿ ; |
||
639 | ;ïðîñòî ñîçäàäèì îäíó |
||
640 | if 0 ;ïîêà ýòî ïðîñòî ëèøíåå |
||
641 | cmp ebx, LFB_BASE |
||
642 | jb .core_tabs ;òàáëèöû ñòðàíèö ÿäðà |
||
643 | ;Îøèáêà |
||
644 | .lfb: |
||
645 | ;îáëàñòü LFB |
||
646 | ;Îøèáêà |
||
647 | jmp .fail |
||
648 | end if |
||
649 | .core_tabs: |
||
650 | .fail: ;simply return to caller |
||
651 | mov esp, ebp |
||
652 | pop ebx ;restore exception number (#PF) |
||
653 | ret |
||
654 | |||
655 | ; xchg bx, bx |
||
656 | ; add esp,12 ;clear in stack: locals(.err_addr) + #PF + ret_to_caller |
||
657 | ; restore_ring3_context |
||
658 | ; iretd |
||
659 | |||
660 | .user_space: |
||
661 | test eax, PG_MAP |
||
662 | jnz .err_access ;Ñòðàíèöà ïðèñóòñòâóåò |
||
663 | ;Îøèáêà äîñòóïà ? |
||
664 | |||
665 | shr ebx, 12 |
||
666 | mov ecx, ebx |
||
667 | shr ecx, 10 |
||
668 | mov edx, [master_tab+ecx*4] |
||
669 | test edx, PG_MAP |
||
670 | jz .fail ;òàáëèöà ñòðàíèö íå ñîçäàíà |
||
671 | ;íåâåðíûé àäðåñ â ïðîãðàììå |
||
672 | |||
673 | mov eax, [page_tabs+ebx*4] |
||
674 | test eax, 2 |
||
675 | jz .fail ;àäðåñ íå çàðåçåðâèðîâàí äëÿ ; |
||
676 | ;èñïîëüçîâàíèÿ. Îøèáêà |
||
677 | .alloc: |
||
678 | call alloc_page |
||
679 | test eax, eax |
||
680 | jz .fail |
||
681 | |||
682 | stdcall map_page, [.err_addr], eax, PG_UW |
||
683 | |||
684 | mov edi, [.err_addr] |
||
685 | and edi, 0xFFFFF000 |
||
686 | mov ecx, 1024 |
||
687 | xor eax, eax |
||
688 | ;cld ;caller is duty for this |
||
689 | rep stosd |
||
690 | .exit: ;iret with repeat fault instruction |
||
691 | add esp, 12;clear in stack: locals(.err_addr) + #PF + ret_to_caller |
||
692 | restore_ring3_context |
||
693 | iretd |
||
694 | |||
695 | .err_access: |
||
696 | ; access denied? this may be a result of copy-on-write protection for DLL |
||
697 | ; check list of HDLLs |
||
698 | and ebx, not 0xFFF |
||
699 | mov eax, [CURRENT_TASK] |
||
700 | shl eax, 8 |
||
701 | mov eax, [SLOT_BASE+eax+APPDATA.dlls_list_ptr] |
||
702 | test eax, eax |
||
703 | jz .fail |
||
704 | mov esi, [eax+HDLL.fd] |
||
705 | .scan_hdll: |
||
706 | cmp esi, eax |
||
707 | jz .fail |
||
708 | mov edx, ebx |
||
709 | sub edx, [esi+HDLL.base] |
||
710 | cmp edx, [esi+HDLL.size] |
||
711 | jb .fault_in_hdll |
||
712 | .scan_hdll.next: |
||
713 | mov esi, [esi+HDLL.fd] |
||
714 | jmp .scan_hdll |
||
715 | .fault_in_hdll: |
||
716 | ; allocate new page, map it as rw and copy data |
||
717 | call alloc_page |
||
718 | test eax, eax |
||
719 | jz .fail |
||
720 | stdcall map_page, ebx, eax, PG_UW |
||
721 | mov edi, ebx |
||
722 | mov ecx, 1024 |
||
723 | sub ebx, [esi+HDLL.base] |
||
724 | mov esi, [esi+HDLL.parent] |
||
725 | mov esi, [esi+DLLDESCR.data] |
||
726 | add esi, ebx |
||
727 | rep movsd |
||
728 | jmp .exit |
||
729 | |||
730 | .kernel_space: |
||
731 | test eax, PG_MAP |
||
732 | jz .fail ;ñòðàíèöà íå ïðèñóòñòâóåò |
||
733 | |||
734 | test eax, 12 ;U/S (+below) |
||
735 | jnz .fail ;ïðèëîæåíèå îáðàòèëîñü ê ïàìÿòè |
||
736 | ;ÿäðà |
||
737 | ;test eax, 8 |
||
738 | ;jnz .fail ;óñòàíîâëåí çàðåçåðâèðîâàííûé áèò |
||
739 | ;â òàáëèöàõ ñòðàíèö. äîáàâëåíî â P4/Xeon |
||
740 | |||
741 | ;ïîïûòêà çàïèñè â çàùèù¸ííóþ ñòðàíèöó ÿäðà |
||
742 | |||
743 | cmp ebx, tss._io_map_0 |
||
744 | jb .fail |
||
745 | |||
746 | cmp ebx, tss._io_map_0+8192 |
||
747 | jae .fail |
||
748 | |||
749 | ; io permission map |
||
750 | ; copy-on-write protection |
||
751 | |||
752 | call alloc_page |
||
753 | test eax, eax |
||
754 | jz .fail |
||
755 | |||
756 | push eax |
||
757 | stdcall map_page, [.err_addr], eax, dword PG_SW |
||
758 | pop eax |
||
759 | mov edi, [.err_addr] |
||
760 | and edi, -4096 |
||
761 | lea esi, [edi+(not tss._io_map_0)+1]; -tss._io_map_0 |
||
762 | |||
763 | mov ebx, esi |
||
764 | shr ebx, 12 |
||
765 | mov edx, [current_slot] |
||
766 | or eax, PG_SW |
||
767 | mov [edx+APPDATA.io_map+ebx*4], eax |
||
768 | |||
769 | add esi, [default_io_map] |
||
770 | mov ecx, 4096/4 |
||
771 | ;cld ;caller is duty for this |
||
772 | rep movsd |
||
773 | jmp .exit |
||
774 | endp |
||
775 | |||
776 | ; returns number of mapped bytes |
||
777 | proc map_mem stdcall, lin_addr:dword,slot:dword,\ |
||
778 | ofs:dword,buf_size:dword,req_access:dword |
||
779 | push 0 ; initialize number of mapped bytes |
||
780 | |||
781 | cmp [buf_size], 0 |
||
782 | jz .exit |
||
783 | |||
784 | mov eax, [slot] |
||
785 | shl eax, 8 |
||
786 | mov eax, [SLOT_BASE+eax+APPDATA.dir_table] |
||
787 | and eax, 0xFFFFF000 |
||
788 | |||
789 | stdcall map_page, [ipc_pdir], eax, PG_UW |
||
790 | mov ebx, [ofs] |
||
791 | shr ebx, 22 |
||
792 | mov esi, [ipc_pdir] |
||
793 | mov edi, [ipc_ptab] |
||
794 | mov eax, [esi+ebx*4] |
||
795 | and eax, 0xFFFFF000 |
||
796 | jz .exit |
||
797 | stdcall map_page, edi, eax, PG_UW |
||
798 | ; inc ebx |
||
799 | ; add edi, 0x1000 |
||
800 | ; mov eax, [esi+ebx*4] |
||
801 | ; test eax, eax |
||
802 | ; jz @f |
||
803 | ; and eax, 0xFFFFF000 |
||
804 | ; stdcall map_page, edi, eax |
||
805 | |||
806 | @@: |
||
807 | mov edi, [lin_addr] |
||
808 | and edi, 0xFFFFF000 |
||
809 | mov ecx, [buf_size] |
||
810 | add ecx, 4095 |
||
811 | shr ecx, 12 |
||
812 | inc ecx |
||
813 | |||
814 | mov edx, [ofs] |
||
815 | shr edx, 12 |
||
816 | and edx, 0x3FF |
||
817 | mov esi, [ipc_ptab] |
||
818 | |||
819 | .map: |
||
820 | stdcall safe_map_page, [slot], [req_access], [ofs] |
||
821 | jnc .exit |
||
822 | add dword [ebp-4], 4096 |
||
823 | add [ofs], 4096 |
||
824 | dec ecx |
||
825 | jz .exit |
||
826 | add edi, 0x1000 |
||
827 | inc edx |
||
828 | cmp edx, 0x400 |
||
829 | jnz .map |
||
830 | inc ebx |
||
831 | mov eax, [ipc_pdir] |
||
832 | mov eax, [eax+ebx*4] |
||
833 | and eax, 0xFFFFF000 |
||
834 | jz .exit |
||
835 | stdcall map_page, esi, eax, PG_UW |
||
836 | xor edx, edx |
||
837 | jmp .map |
||
838 | |||
839 | .exit: |
||
840 | pop eax |
||
841 | ret |
||
842 | endp |
||
843 | |||
844 | proc map_memEx stdcall, lin_addr:dword,slot:dword,\ |
||
845 | ofs:dword,buf_size:dword,req_access:dword |
||
846 | push 0 ; initialize number of mapped bytes |
||
847 | |||
848 | cmp [buf_size], 0 |
||
849 | jz .exit |
||
850 | |||
851 | mov eax, [slot] |
||
852 | shl eax, 8 |
||
853 | mov eax, [SLOT_BASE+eax+APPDATA.dir_table] |
||
854 | and eax, 0xFFFFF000 |
||
855 | |||
856 | stdcall map_page, [proc_mem_pdir], eax, PG_UW |
||
857 | mov ebx, [ofs] |
||
858 | shr ebx, 22 |
||
859 | mov esi, [proc_mem_pdir] |
||
860 | mov edi, [proc_mem_tab] |
||
861 | mov eax, [esi+ebx*4] |
||
862 | and eax, 0xFFFFF000 |
||
863 | test eax, eax |
||
864 | jz .exit |
||
865 | stdcall map_page, edi, eax, PG_UW |
||
866 | |||
867 | @@: |
||
868 | mov edi, [lin_addr] |
||
869 | and edi, 0xFFFFF000 |
||
870 | mov ecx, [buf_size] |
||
871 | add ecx, 4095 |
||
872 | shr ecx, 12 |
||
873 | inc ecx |
||
874 | |||
875 | mov edx, [ofs] |
||
876 | shr edx, 12 |
||
877 | and edx, 0x3FF |
||
878 | mov esi, [proc_mem_tab] |
||
879 | |||
880 | .map: |
||
881 | stdcall safe_map_page, [slot], [req_access], [ofs] |
||
882 | jnc .exit |
||
883 | add dword [ebp-4], 0x1000 |
||
884 | add edi, 0x1000 |
||
885 | add [ofs], 0x1000 |
||
886 | inc edx |
||
887 | dec ecx |
||
888 | jnz .map |
||
889 | .exit: |
||
890 | pop eax |
||
891 | ret |
||
892 | endp |
||
893 | |||
894 | ; in: esi+edx*4 = pointer to page table entry |
||
895 | ; in: [slot], [req_access], [ofs] on the stack |
||
896 | ; in: edi = linear address to map |
||
897 | ; out: CF cleared <=> failed |
||
898 | ; destroys: only eax |
||
899 | proc safe_map_page stdcall, slot:dword, req_access:dword, ofs:dword |
||
900 | mov eax, [esi+edx*4] |
||
901 | test al, PG_MAP |
||
902 | jz .not_present |
||
903 | test al, PG_WRITE |
||
904 | jz .resolve_readonly |
||
905 | ; normal case: writable page, just map with requested access |
||
906 | .map: |
||
907 | stdcall map_page, edi, eax, [req_access] |
||
908 | stc |
||
909 | .fail: |
||
910 | ret |
||
911 | .not_present: |
||
912 | ; check for alloc-on-demand page |
||
913 | test al, 2 |
||
914 | jz .fail |
||
915 | ; allocate new page, save it to source page table |
||
916 | push ecx |
||
917 | call alloc_page |
||
918 | pop ecx |
||
919 | test eax, eax |
||
920 | jz .fail |
||
921 | or al, PG_UW |
||
922 | mov [esi+edx*4], eax |
||
923 | jmp .map |
||
924 | .resolve_readonly: |
||
925 | ; readonly page, probably copy-on-write |
||
926 | ; check: readonly request of readonly page is ok |
||
927 | test [req_access], PG_WRITE |
||
928 | jz .map |
||
929 | ; find control structure for this page |
||
930 | pushf |
||
931 | cli |
||
932 | cld |
||
933 | push ebx ecx |
||
934 | mov eax, [slot] |
||
935 | shl eax, 8 |
||
936 | mov eax, [SLOT_BASE+eax+APPDATA.dlls_list_ptr] |
||
937 | test eax, eax |
||
938 | jz .no_hdll |
||
939 | mov ecx, [eax+HDLL.fd] |
||
940 | .scan_hdll: |
||
941 | cmp ecx, eax |
||
942 | jz .no_hdll |
||
943 | mov ebx, [ofs] |
||
944 | and ebx, not 0xFFF |
||
945 | sub ebx, [ecx+HDLL.base] |
||
946 | cmp ebx, [ecx+HDLL.size] |
||
947 | jb .hdll_found |
||
948 | mov ecx, [ecx+HDLL.fd] |
||
949 | jmp .scan_hdll |
||
950 | .no_hdll: |
||
951 | pop ecx ebx |
||
952 | popf |
||
953 | clc |
||
954 | ret |
||
955 | .hdll_found: |
||
956 | ; allocate page, save it in page table, map it, copy contents from base |
||
957 | mov eax, [ecx+HDLL.parent] |
||
958 | add ebx, [eax+DLLDESCR.data] |
||
959 | call alloc_page |
||
960 | test eax, eax |
||
961 | jz .no_hdll |
||
962 | or al, PG_UW |
||
963 | mov [esi+edx*4], eax |
||
964 | stdcall map_page, edi, eax, [req_access] |
||
965 | push esi edi |
||
966 | mov esi, ebx |
||
967 | mov ecx, 4096/4 |
||
968 | rep movsd |
||
969 | pop edi esi |
||
970 | pop ecx ebx |
||
971 | popf |
||
972 | stc |
||
973 | ret |
||
974 | endp |
||
975 | |||
976 | sys_IPC: |
||
977 | ;input: |
||
978 | ; ebx=1 - set ipc buffer area |
||
979 | ; ecx=address of buffer |
||
980 | ; edx=size of buffer |
||
981 | ; eax=2 - send message |
||
982 | ; ebx=PID |
||
983 | ; ecx=address of message |
||
984 | ; edx=size of message |
||
985 | |||
986 | dec ebx |
||
987 | jnz @f |
||
988 | |||
989 | mov eax, [current_slot] |
||
990 | pushf |
||
991 | cli |
||
992 | mov [eax+APPDATA.ipc_start], ecx ;set fields in extended information area |
||
993 | mov [eax+APPDATA.ipc_size], edx |
||
994 | |||
995 | add edx, ecx |
||
996 | add edx, 4095 |
||
997 | and edx, not 4095 |
||
998 | |||
999 | .touch: |
||
1000 | mov eax, [ecx] |
||
1001 | add ecx, 0x1000 |
||
1002 | cmp ecx, edx |
||
1003 | jb .touch |
||
1004 | |||
1005 | popf |
||
1006 | mov [esp+32], ebx ;ebx=0 |
||
1007 | ret |
||
1008 | |||
1009 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
||
1010 | ;2 |
||
1011 | @@: |
||
1012 | dec ebx |
||
1013 | jnz @f |
||
1014 | |||
1015 | stdcall sys_ipc_send, ecx, edx, esi |
||
1016 | mov [esp+32], eax |
||
1017 | ret |
||
1018 | @@: |
||
1019 | or eax, -1 |
||
1020 | mov [esp+32], eax |
||
1021 | ret |
||
1022 | |||
1023 | ;align 4 |
||
1024 | ;proc set_ipc_buff |
||
1025 | |||
1026 | ; mov eax,[current_slot] |
||
1027 | ; pushf |
||
1028 | ; cli |
||
1029 | ; mov [eax+APPDATA.ipc_start],ebx ;set fields in extended information area |
||
1030 | ; mov [eax+APPDATA.ipc_size],ecx |
||
1031 | ; |
||
1032 | ; add ecx, ebx |
||
1033 | ; add ecx, 4095 |
||
1034 | ; and ecx, not 4095 |
||
1035 | ; |
||
1036 | ;.touch: mov eax, [ebx] |
||
1037 | ; add ebx, 0x1000 |
||
1038 | ; cmp ebx, ecx |
||
1039 | ; jb .touch |
||
1040 | ; |
||
1041 | ; popf |
||
1042 | ; xor eax, eax |
||
1043 | ; ret |
||
1044 | ;endp |
||
1045 | |||
1046 | proc sys_ipc_send stdcall, PID:dword, msg_addr:dword, msg_size:dword |
||
1047 | locals |
||
1048 | dst_slot dd ? |
||
1049 | dst_offset dd ? |
||
1050 | buf_size dd ? |
||
1051 | used_buf dd ? |
||
1052 | endl |
||
1053 | |||
1054 | pushf |
||
1055 | cli |
||
1056 | |||
1057 | mov eax, [PID] |
||
1058 | call pid_to_slot |
||
1059 | test eax, eax |
||
1060 | jz .no_pid |
||
1061 | |||
1062 | mov [dst_slot], eax |
||
1063 | shl eax, 8 |
||
1064 | mov edi, [eax+SLOT_BASE+0xa0] ;is ipc area defined? |
||
1065 | test edi, edi |
||
1066 | jz .no_ipc_area |
||
1067 | |||
1068 | mov ebx, edi |
||
1069 | and ebx, 0xFFF |
||
1070 | mov [dst_offset], ebx |
||
1071 | |||
1072 | mov esi, [eax+SLOT_BASE+0xa4] |
||
1073 | mov [buf_size], esi |
||
1074 | |||
1075 | mov ecx, [ipc_tmp] |
||
1076 | cmp esi, 0x40000-0x1000; size of [ipc_tmp] minus one page |
||
1077 | jbe @f |
||
1078 | push esi edi |
||
1079 | add esi, 0x1000 |
||
1080 | stdcall alloc_kernel_space, esi |
||
1081 | mov ecx, eax |
||
1082 | pop edi esi |
||
1083 | @@: |
||
1084 | mov [used_buf], ecx |
||
1085 | stdcall map_mem, ecx, [dst_slot], \ |
||
1086 | edi, esi, PG_SW |
||
1087 | |||
1088 | mov edi, [dst_offset] |
||
1089 | add edi, [used_buf] |
||
1090 | cmp dword [edi], 0 |
||
1091 | jnz .ipc_blocked ;if dword [buffer]<>0 - ipc blocked now |
||
1092 | |||
1093 | mov edx, dword [edi+4] |
||
1094 | lea ebx, [edx+8] |
||
1095 | add ebx, [msg_size] |
||
1096 | cmp ebx, [buf_size] |
||
1097 | ja .buffer_overflow ;esi<0 - not enough memory in buffer |
||
1098 | |||
1099 | mov dword [edi+4], ebx |
||
1100 | mov eax, [TASK_BASE] |
||
1101 | mov eax, [eax+0x04] ;eax - our PID |
||
1102 | add edi, edx |
||
1103 | mov [edi], eax |
||
1104 | mov ecx, [msg_size] |
||
1105 | |||
1106 | mov [edi+4], ecx |
||
1107 | add edi, 8 |
||
1108 | mov esi, [msg_addr] |
||
1109 | ; add esi, new_app_base |
||
1110 | cld |
||
1111 | rep movsb |
||
1112 | |||
1113 | mov ebx, [ipc_tmp] |
||
1114 | mov edx, ebx |
||
1115 | shr ebx, 12 |
||
1116 | xor eax, eax |
||
1117 | mov [page_tabs+ebx*4], eax |
||
1118 | invlpg [edx] |
||
1119 | |||
1120 | mov ebx, [ipc_pdir] |
||
1121 | mov edx, ebx |
||
1122 | shr ebx, 12 |
||
1123 | xor eax, eax |
||
1124 | mov [page_tabs+ebx*4], eax |
||
1125 | invlpg [edx] |
||
1126 | |||
1127 | mov ebx, [ipc_ptab] |
||
1128 | mov edx, ebx |
||
1129 | shr ebx, 12 |
||
1130 | xor eax, eax |
||
1131 | mov [page_tabs+ebx*4], eax |
||
1132 | invlpg [edx] |
||
1133 | |||
1134 | mov eax, [dst_slot] |
||
1135 | shl eax, 8 |
||
1136 | or [eax+SLOT_BASE+0xA8], dword 0x40 |
||
1137 | cmp dword [check_idle_semaphore], 20 |
||
1138 | jge .ipc_no_cis |
||
1139 | |||
1140 | mov dword [check_idle_semaphore], 5 |
||
1141 | .ipc_no_cis: |
||
1142 | push 0 |
||
1143 | jmp .ret |
||
1144 | .no_pid: |
||
1145 | popf |
||
1146 | mov eax, 4 |
||
1147 | ret |
||
1148 | .no_ipc_area: |
||
1149 | popf |
||
1150 | xor eax, eax |
||
1151 | inc eax |
||
1152 | ret |
||
1153 | .ipc_blocked: |
||
1154 | push 2 |
||
1155 | jmp .ret |
||
1156 | .buffer_overflow: |
||
1157 | push 3 |
||
1158 | .ret: |
||
1159 | mov eax, [used_buf] |
||
1160 | cmp eax, [ipc_tmp] |
||
1161 | jz @f |
||
1162 | stdcall free_kernel_space, eax |
||
1163 | @@: |
||
1164 | pop eax |
||
1165 | popf |
||
1166 | ret |
||
1167 | endp |
||
1168 | |||
1169 | align 4 |
||
1170 | sysfn_meminfo: |
||
1171 | |||
1172 | ; add ecx, new_app_base |
||
1173 | cmp ecx, OS_BASE |
||
1174 | jae .fail |
||
1175 | |||
1176 | mov eax, [pg_data.pages_count] |
||
1177 | mov [ecx], eax |
||
1178 | shl eax, 12 |
||
1179 | mov [esp+32], eax |
||
1180 | mov eax, [pg_data.pages_free] |
||
1181 | mov [ecx+4], eax |
||
1182 | mov eax, [pg_data.pages_faults] |
||
1183 | mov [ecx+8], eax |
||
1184 | mov eax, [heap_size] |
||
1185 | mov [ecx+12], eax |
||
1186 | mov eax, [heap_free] |
||
1187 | mov [ecx+16], eax |
||
1188 | mov eax, [heap_blocks] |
||
1189 | mov [ecx+20], eax |
||
1190 | mov eax, [free_blocks] |
||
1191 | mov [ecx+24], eax |
||
1192 | ret |
||
1193 | .fail: |
||
1194 | or dword [esp+32], -1 |
||
1195 | ret |
||
1196 | |||
1197 | align 4 |
||
1198 | f68: |
||
1199 | cmp ebx, 4 |
||
1200 | jbe sys_sheduler |
||
1201 | |||
1202 | cmp ebx, 11 |
||
1203 | jb .fail |
||
1204 | |||
1205 | cmp ebx, 25 |
||
1206 | ja .fail |
||
1207 | |||
1208 | jmp dword [f68call+ebx*4-11*4] |
||
1209 | .11: |
||
1210 | call init_heap |
||
1211 | mov [esp+32], eax |
||
1212 | ret |
||
1213 | .12: |
||
1214 | stdcall user_alloc, ecx |
||
1215 | mov [esp+32], eax |
||
1216 | ret |
||
1217 | .13: |
||
1218 | stdcall user_free, ecx |
||
1219 | mov [esp+32], eax |
||
1220 | ret |
||
1221 | .14: |
||
1222 | cmp ecx, OS_BASE |
||
1223 | jae .fail |
||
1224 | mov edi, ecx |
||
1225 | call get_event_ex |
||
1226 | mov [esp+32], eax |
||
1227 | ret |
||
1228 | .16: |
||
1229 | test ecx, ecx |
||
1230 | jz .fail |
||
1231 | cmp ecx, OS_BASE |
||
1232 | jae .fail |
||
1233 | stdcall get_service, ecx |
||
1234 | mov [esp+32], eax |
||
1235 | ret |
||
1236 | .17: |
||
1237 | call srv_handlerEx ;ecx |
||
1238 | mov [esp+32], eax |
||
1239 | ret |
||
1240 | .19: |
||
1241 | cmp ecx, OS_BASE |
||
1242 | jae .fail |
||
1243 | stdcall load_library, ecx |
||
1244 | mov [esp+32], eax |
||
1245 | ret |
||
1246 | .20: |
||
1247 | mov eax, edx |
||
1248 | mov ebx, ecx |
||
1249 | call user_realloc ;in: eax = pointer, ebx = new size |
||
1250 | mov [esp+32], eax |
||
1251 | ret |
||
1252 | .21: |
||
1253 | cmp ecx, OS_BASE |
||
1254 | jae .fail |
||
1255 | |||
1256 | cmp ebx, OS_BASE |
||
1257 | jae .fail |
||
1258 | |||
1259 | mov edi, edx |
||
1260 | stdcall load_PE, ecx |
||
1261 | mov esi, eax |
||
1262 | test eax, eax |
||
1263 | jz @F |
||
1264 | |||
1265 | push edi |
||
1266 | push DRV_ENTRY |
||
1267 | call eax |
||
1268 | add esp, 8 |
||
1269 | test eax, eax |
||
1270 | jz @F |
||
1271 | |||
1272 | mov [eax+SRV.entry], esi |
||
1273 | |||
1274 | @@: |
||
1275 | mov [esp+32], eax |
||
1276 | ret |
||
1277 | .22: |
||
1278 | cmp ecx, OS_BASE |
||
1279 | jae .fail |
||
1280 | |||
1281 | stdcall shmem_open, ecx, edx, esi |
||
1282 | mov [esp+24], edx |
||
1283 | mov [esp+32], eax |
||
1284 | ret |
||
1285 | |||
1286 | .23: |
||
1287 | cmp ecx, OS_BASE |
||
1288 | jae .fail |
||
1289 | |||
1290 | stdcall shmem_close, ecx |
||
1291 | mov [esp+32], eax |
||
1292 | ret |
||
1293 | .24: |
||
1294 | mov eax, [current_slot] |
||
1295 | xchg ecx, [eax+APPDATA.exc_handler] |
||
1296 | xchg edx, [eax+APPDATA.except_mask] |
||
1297 | mov [esp+32], ecx ; reg_eax+8 |
||
1298 | mov [esp+20], edx ; reg_ebx+8 |
||
1299 | ret |
||
1300 | .25: |
||
1301 | cmp ecx, 32 |
||
1302 | jae .fail |
||
1303 | mov eax, [current_slot] |
||
1304 | btr [eax+APPDATA.except_mask], ecx |
||
1305 | setc byte[esp+32] |
||
1306 | jecxz @f |
||
1307 | bts [eax+APPDATA.except_mask], ecx |
||
1308 | @@: |
||
1309 | ret |
||
1310 | |||
2400 | Serge | 1311 | .26: |
1312 | stdcall user_unmap, ecx, edx, esi |
||
1313 | mov [esp+32], eax |
||
1314 | ret |
||
1315 | |||
2288 | clevermous | 1316 | .fail: |
1317 | xor eax, eax |
||
1318 | mov [esp+32], eax |
||
1319 | ret |
||
1320 | |||
1321 | |||
1322 | align 4 |
||
1323 | f68call: ; keep this table closer to main code |
||
1324 | |||
1325 | dd f68.11 ; init_heap |
||
1326 | dd f68.12 ; user_alloc |
||
1327 | dd f68.13 ; user_free |
||
1328 | dd f68.14 ; get_event_ex |
||
1329 | dd f68.fail ; moved to f68.24 |
||
1330 | dd f68.16 ; get_service |
||
1331 | dd f68.17 ; call_service |
||
1332 | dd f68.fail ; moved to f68.25 |
||
1333 | dd f68.19 ; load_dll |
||
1334 | dd f68.20 ; user_realloc |
||
1335 | dd f68.21 ; load_driver |
||
1336 | dd f68.22 ; shmem_open |
||
1337 | dd f68.23 ; shmem_close |
||
2400 | Serge | 1338 | dd f68.24 ; set exception handler |
1339 | dd f68.25 ; unmask exception |
||
1340 | dd f68.26 ; user_unmap |
||
2288 | clevermous | 1341 | |
1342 | |||
1343 | align 4 |
||
1344 | proc load_pe_driver stdcall, file:dword |
||
1345 | |||
1346 | stdcall load_PE, [file] |
||
1347 | test eax, eax |
||
1348 | jz .fail |
||
1349 | |||
1350 | mov esi, eax |
||
1351 | stdcall eax, DRV_ENTRY |
||
1352 | test eax, eax |
||
1353 | jz .fail |
||
1354 | |||
1355 | mov [eax+SRV.entry], esi |
||
1356 | ret |
||
1357 | |||
1358 | .fail: |
||
1359 | xor eax, eax |
||
1360 | ret |
||
1361 | endp |
||
1362 | |||
1363 | |||
1364 | align 4 |
||
1365 | proc init_mtrr |
||
1366 | |||
1367 | cmp [BOOT_VAR+0x901c], byte 2 |
||
1368 | je .exit |
||
1369 | |||
1370 | bt [cpu_caps], CAPS_MTRR |
||
1371 | jnc .exit |
||
1372 | |||
1373 | mov eax, cr0 |
||
1374 | or eax, 0x60000000 ;disable caching |
||
1375 | mov cr0, eax |
||
1376 | wbinvd ;invalidate cache |
||
1377 | |||
1378 | mov ecx, 0x2FF |
||
1379 | rdmsr ; |
||
1380 | ; has BIOS already initialized MTRRs? |
||
1381 | test ah, 8 |
||
1382 | jnz .skip_init |
||
1383 | ; rarely needed, so mainly placeholder |
||
1384 | ; main memory - cached |
||
1385 | push eax |
||
1386 | |||
1387 | mov eax, [MEM_AMOUNT] |
||
1388 | ; round eax up to next power of 2 |
||
1389 | dec eax |
||
1390 | bsr ecx, eax |
||
1391 | mov ebx, 2 |
||
1392 | shl ebx, cl |
||
1393 | dec ebx |
||
1394 | ; base of memory range = 0, type of memory range = MEM_WB |
||
1395 | xor edx, edx |
||
1396 | mov eax, MEM_WB |
||
1397 | mov ecx, 0x200 |
||
1398 | wrmsr |
||
1399 | ; mask of memory range = 0xFFFFFFFFF - (size - 1), ebx = size - 1 |
||
1400 | mov eax, 0xFFFFFFFF |
||
1401 | mov edx, 0x0000000F |
||
1402 | sub eax, ebx |
||
1403 | sbb edx, 0 |
||
1404 | or eax, 0x800 |
||
1405 | inc ecx |
||
1406 | wrmsr |
||
1407 | ; clear unused MTRRs |
||
1408 | xor eax, eax |
||
1409 | xor edx, edx |
||
1410 | @@: |
||
1411 | wrmsr |
||
1412 | inc ecx |
||
1413 | cmp ecx, 0x210 |
||
1414 | jb @b |
||
1415 | ; enable MTRRs |
||
1416 | pop eax |
||
1417 | or ah, 8 |
||
1418 | and al, 0xF0; default memtype = UC |
||
1419 | mov ecx, 0x2FF |
||
1420 | wrmsr |
||
1421 | .skip_init: |
||
1422 | stdcall set_mtrr, [LFBAddress], [LFBSize], MEM_WC |
||
1423 | |||
1424 | wbinvd ;again invalidate |
||
1425 | |||
1426 | mov eax, cr0 |
||
1427 | and eax, not 0x60000000 |
||
1428 | mov cr0, eax ; enable caching |
||
1429 | .exit: |
||
1430 | ret |
||
1431 | endp |
||
1432 | |||
1433 | align 4 |
||
1434 | proc set_mtrr stdcall, base:dword,size:dword,mem_type:dword |
||
1435 | ; find unused register |
||
1436 | mov ecx, 0x201 |
||
1437 | @@: |
||
1438 | rdmsr |
||
1439 | dec ecx |
||
1440 | test ah, 8 |
||
1441 | jz .found |
||
1442 | rdmsr |
||
1443 | mov al, 0; clear memory type field |
||
1444 | cmp eax, [base] |
||
1445 | jz .ret |
||
1446 | add ecx, 3 |
||
1447 | cmp ecx, 0x210 |
||
1448 | jb @b |
||
1449 | ; no free registers, ignore the call |
||
1450 | .ret: |
||
1451 | ret |
||
1452 | .found: |
||
1453 | ; found, write values |
||
1454 | xor edx, edx |
||
1455 | mov eax, [base] |
||
1456 | or eax, [mem_type] |
||
1457 | wrmsr |
||
1458 | |||
1459 | mov ebx, [size] |
||
1460 | dec ebx |
||
1461 | mov eax, 0xFFFFFFFF |
||
1462 | mov edx, 0x00000000 |
||
1463 | sub eax, ebx |
||
1464 | sbb edx, 0 |
||
1465 | or eax, 0x800 |
||
1466 | inc ecx |
||
1467 | wrmsr |
||
1468 | ret |
||
1469 | endp |
||
1470 | |||
1471 | align 4 |
||
1472 | proc stall stdcall, delay:dword |
||
1473 | push ecx |
||
1474 | push edx |
||
1475 | push ebx |
||
1476 | push eax |
||
1477 | |||
1478 | mov eax, [delay] |
||
1479 | mul [stall_mcs] |
||
1480 | mov ebx, eax ;low |
||
1481 | mov ecx, edx ;high |
||
1482 | rdtsc |
||
1483 | add ebx, eax |
||
1484 | adc ecx, edx |
||
1485 | @@: |
||
1486 | rdtsc |
||
1487 | sub eax, ebx |
||
1488 | sbb edx, ecx |
||
1489 | jb @B |
||
1490 | |||
1491 | pop eax |
||
1492 | pop ebx |
||
1493 | pop edx |
||
1494 | pop ecx |
||
1495 | ret |
||
1496 | endp |
||
1497 | |||
1498 | align 4 |
||
1499 | proc create_ring_buffer stdcall, size:dword, flags:dword |
||
1500 | locals |
||
1501 | buf_ptr dd ? |
||
1502 | endl |
||
1503 | |||
1504 | mov eax, [size] |
||
1505 | test eax, eax |
||
1506 | jz .fail |
||
1507 | |||
1508 | add eax, eax |
||
1509 | stdcall alloc_kernel_space, eax |
||
1510 | test eax, eax |
||
1511 | jz .fail |
||
1512 | |||
1513 | push ebx |
||
1514 | |||
1515 | mov [buf_ptr], eax |
||
1516 | |||
1517 | mov ebx, [size] |
||
1518 | shr ebx, 12 |
||
1519 | push ebx |
||
1520 | |||
1521 | stdcall alloc_pages, ebx |
||
1522 | pop ecx |
||
1523 | |||
1524 | test eax, eax |
||
1525 | jz .mm_fail |
||
1526 | |||
1527 | push edi |
||
1528 | |||
1529 | or eax, [flags] |
||
1530 | mov edi, [buf_ptr] |
||
1531 | mov ebx, [buf_ptr] |
||
1532 | mov edx, ecx |
||
1533 | shl edx, 2 |
||
1534 | shr edi, 10 |
||
1535 | @@: |
||
1536 | mov [page_tabs+edi], eax |
||
1537 | mov [page_tabs+edi+edx], eax |
||
1538 | invlpg [ebx] |
||
1539 | invlpg [ebx+0x10000] |
||
1540 | add eax, 0x1000 |
||
1541 | add ebx, 0x1000 |
||
1542 | add edi, 4 |
||
1543 | dec ecx |
||
1544 | jnz @B |
||
1545 | |||
1546 | mov eax, [buf_ptr] |
||
1547 | pop edi |
||
1548 | pop ebx |
||
1549 | ret |
||
1550 | .mm_fail: |
||
1551 | stdcall free_kernel_space, [buf_ptr] |
||
1552 | xor eax, eax |
||
1553 | pop ebx |
||
1554 | .fail: |
||
1555 | ret |
||
1556 | endp0>>=> |