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Rev | Author | Line No. | Line |
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1159 | hidnplayr | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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3 | ;; Copyright (C) KolibriOS team 2004-2008. All rights reserved. ;; |
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4 | ;; Distributed under terms of the GNU General Public License ;; |
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5 | ;; ;; |
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6 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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7 | |||
8 | $Revision: 983 $ |
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9 | |||
10 | |||
11 | struc MEM_BLOCK |
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12 | { .next_block dd ? |
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13 | .prev_block dd ? ;+4 |
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14 | .list_fd dd ? ;+8 |
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15 | .list_bk dd ? ;+12 |
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16 | .base dd ? ;+16 |
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17 | .size dd ? ;+20 |
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18 | .flags dd ? ;+24 |
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19 | .handle dd ? ;+28 |
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20 | } |
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21 | |||
22 | MEM_LIST_OFFSET equ 8 |
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23 | FREE_BLOCK equ 4 |
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24 | USED_BLOCK equ 8 |
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25 | DONT_FREE_BLOCK equ 10h |
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26 | |||
27 | virtual at 0 |
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28 | MEM_BLOCK MEM_BLOCK |
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29 | end virtual |
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30 | |||
31 | MEM_BLOCK_SIZE equ 8*4 |
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32 | |||
33 | block_next equ MEM_BLOCK.next_block |
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34 | block_prev equ MEM_BLOCK.prev_block |
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35 | list_fd equ MEM_BLOCK.list_fd |
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36 | list_bk equ MEM_BLOCK.list_bk |
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37 | block_base equ MEM_BLOCK.base |
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38 | block_size equ MEM_BLOCK.size |
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39 | block_flags equ MEM_BLOCK.flags |
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40 | |||
41 | macro calc_index op |
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42 | { shr op, 12 |
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43 | dec op |
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44 | cmp op, 63 |
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45 | jna @f |
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46 | mov op, 63 |
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47 | @@: |
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48 | } |
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49 | |||
50 | macro remove_from_list op |
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51 | { mov edx, [op+list_fd] |
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52 | mov ecx, [op+list_bk] |
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53 | test edx, edx |
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54 | jz @f |
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55 | mov [edx+list_bk], ecx |
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56 | @@: |
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57 | test ecx, ecx |
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58 | jz @f |
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59 | mov [ecx+list_fd], edx |
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60 | @@: |
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61 | mov [op+list_fd],0 |
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62 | mov [op+list_bk],0 |
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63 | } |
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64 | |||
65 | macro remove_from_free op |
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66 | { |
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67 | remove_from_list op |
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68 | |||
69 | mov eax, [op+block_size] |
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70 | calc_index eax |
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71 | cmp [mem_block_list+eax*4], op |
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72 | jne @f |
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73 | mov [mem_block_list+eax*4], edx |
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74 | @@: |
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75 | cmp [mem_block_list+eax*4], 0 |
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76 | jne @f |
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77 | btr [mem_block_mask], eax |
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78 | @@: |
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79 | } |
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80 | |||
81 | macro remove_from_used op |
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82 | { |
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83 | mov edx, [op+list_fd] |
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84 | mov ecx, [op+list_bk] |
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85 | mov [edx+list_bk], ecx |
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86 | mov [ecx+list_fd], edx |
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87 | mov [op+list_fd], 0 |
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88 | mov [op+list_bk], 0 |
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89 | } |
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90 | |||
91 | align 4 |
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92 | proc init_kernel_heap |
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93 | |||
1198 | clevermous | 94 | mov ecx, 64 |
95 | mov edi, mem_block_list |
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96 | xor eax, eax |
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97 | cld |
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98 | rep stosd |
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1159 | hidnplayr | 99 | |
100 | mov ecx, 512/4 |
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101 | mov edi, mem_block_map |
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102 | not eax |
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103 | rep stosd |
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104 | |||
105 | mov [mem_block_start], mem_block_map |
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106 | mov [mem_block_end], mem_block_map+512 |
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107 | mov [mem_block_arr], HEAP_BASE |
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108 | |||
109 | mov eax, mem_used.fd-MEM_LIST_OFFSET |
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110 | mov [mem_used.fd], eax |
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111 | mov [mem_used.bk], eax |
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112 | |||
113 | stdcall alloc_pages, dword 32 |
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114 | mov ecx, 32 |
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115 | mov edx, eax |
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116 | mov edi, HEAP_BASE |
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117 | .l1: |
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118 | stdcall map_page,edi,edx,PG_SW |
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119 | add edi, 0x1000 |
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120 | add edx, 0x1000 |
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121 | dec ecx |
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122 | jnz .l1 |
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123 | |||
124 | mov edi, HEAP_BASE |
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125 | mov ebx, HEAP_BASE+MEM_BLOCK_SIZE |
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126 | xor eax, eax |
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127 | mov [edi+block_next], ebx |
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128 | mov [edi+block_prev], eax |
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129 | mov [edi+list_fd], eax |
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130 | mov [edi+list_bk], eax |
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131 | mov [edi+block_base], HEAP_BASE |
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132 | mov [edi+block_size], 4096*MEM_BLOCK_SIZE |
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133 | mov [edi+block_flags], USED_BLOCK |
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134 | |||
135 | mov [ebx+block_next], eax |
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136 | mov [ebx+block_prev], eax |
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137 | mov [ebx+list_fd], eax |
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138 | mov [ebx+list_bk], eax |
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139 | mov [ebx+block_base], HEAP_BASE+4096*MEM_BLOCK_SIZE |
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140 | |||
1198 | clevermous | 141 | mov ecx, [pg_data.kernel_pages] |
142 | shl ecx, 12 |
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143 | sub ecx, HEAP_BASE+4096*MEM_BLOCK_SIZE |
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144 | mov [heap_size], ecx |
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145 | mov [heap_free], ecx |
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146 | mov [ebx+block_size], ecx |
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147 | mov [ebx+block_flags], FREE_BLOCK |
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1159 | hidnplayr | 148 | |
149 | mov [mem_block_mask], eax |
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150 | mov [mem_block_mask+4],0x80000000 |
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151 | |||
1198 | clevermous | 152 | mov [mem_block_list+63*4], ebx |
153 | mov byte [mem_block_map], 0xFC |
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154 | and [heap_mutex], 0 |
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155 | mov [heap_blocks], 4095 |
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156 | mov [free_blocks], 4094 |
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157 | ret |
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1159 | hidnplayr | 158 | endp |
159 | |||
160 | ; param |
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161 | ; eax= required size |
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162 | ; |
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163 | ; retval |
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164 | ; edi= memory block descriptor |
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165 | ; ebx= descriptor index |
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166 | |||
167 | align 4 |
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168 | get_small_block: |
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169 | mov ecx, eax |
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170 | shr ecx, 12 |
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171 | dec ecx |
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172 | cmp ecx, 63 |
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173 | jle .get_index |
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174 | mov ecx, 63 |
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175 | .get_index: |
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176 | lea esi, [mem_block_mask] |
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177 | xor ebx, ebx |
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178 | or edx, -1 |
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179 | |||
180 | cmp ecx, 32 |
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181 | jb .bit_test |
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182 | |||
183 | sub ecx, 32 |
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184 | add ebx, 32 |
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185 | add esi, 4 |
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186 | .bit_test: |
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187 | shl edx, cl |
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188 | and edx, [esi] |
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189 | .find: |
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190 | bsf edi, edx |
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191 | jz .high_mask |
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192 | add ebx, edi |
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193 | mov edi, [mem_block_list+ebx*4] |
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194 | .check_size: |
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195 | cmp eax, [edi+block_size] |
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196 | ja .next |
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197 | ret |
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198 | |||
199 | .high_mask: |
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200 | add esi, 4 |
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201 | cmp esi, mem_block_mask+8 |
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202 | jae .err |
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203 | add ebx, 32 |
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204 | mov edx, [esi] |
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205 | jmp .find |
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206 | .next: |
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207 | mov edi, [edi+list_fd] |
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208 | test edi, edi |
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209 | jnz .check_size |
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210 | .err: |
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211 | xor edi, edi |
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212 | ret |
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213 | |||
214 | align 4 |
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215 | alloc_mem_block: |
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216 | |||
217 | mov ebx, [mem_block_start] |
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218 | mov ecx, [mem_block_end] |
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219 | .l1: |
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220 | bsf eax,[ebx]; |
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221 | jnz found |
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222 | add ebx,4 |
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223 | cmp ebx, ecx |
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224 | jb .l1 |
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225 | xor eax,eax |
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226 | ret |
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227 | |||
228 | found: |
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229 | btr [ebx], eax |
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230 | mov [mem_block_start],ebx |
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231 | sub ebx, mem_block_map |
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232 | lea eax,[eax+ebx*8] |
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233 | shl eax, 5 |
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234 | add eax, [mem_block_arr] |
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235 | dec [free_blocks] |
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236 | ret |
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237 | align 4 |
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238 | free_mem_block: |
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239 | mov dword [eax], 0 |
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240 | mov dword [eax+4], 0 |
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241 | mov dword [eax+8], 0 |
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242 | mov dword [eax+12], 0 |
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243 | mov dword [eax+16], 0 |
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244 | ; mov dword [eax+20], 0 |
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245 | mov dword [eax+24], 0 |
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246 | mov dword [eax+28], 0 |
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247 | |||
248 | sub eax, [mem_block_arr] |
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249 | shr eax, 5 |
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250 | |||
251 | mov ebx, mem_block_map |
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252 | bts [ebx], eax |
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253 | inc [free_blocks] |
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254 | shr eax, 3 |
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255 | and eax, not 3 |
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256 | add eax, ebx |
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257 | cmp [mem_block_start], eax |
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258 | ja @f |
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259 | ret |
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260 | @@: |
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261 | mov [mem_block_start], eax |
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262 | ret |
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263 | .err: |
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264 | xor eax, eax |
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265 | ret |
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266 | |||
267 | align 4 |
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268 | proc alloc_kernel_space stdcall, size:dword |
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269 | local block_ind:DWORD |
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270 | |||
271 | push ebx |
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272 | push esi |
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273 | push edi |
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274 | |||
275 | mov eax, [size] |
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276 | add eax, 4095 |
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277 | and eax, not 4095 |
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278 | mov [size], eax |
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279 | |||
280 | mov ebx, heap_mutex |
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281 | call wait_mutex ;ebx |
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282 | |||
283 | cmp eax, [heap_free] |
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284 | ja .error |
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285 | |||
286 | call get_small_block ; eax |
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287 | test edi, edi |
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288 | jz .error |
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289 | |||
290 | cmp [edi+block_flags], FREE_BLOCK |
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291 | jne .error |
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292 | |||
293 | mov [block_ind], ebx ;index of allocated block |
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294 | |||
295 | mov eax, [edi+block_size] |
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296 | cmp eax, [size] |
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297 | je .m_eq_size |
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298 | |||
299 | call alloc_mem_block |
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300 | and eax, eax |
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301 | jz .error |
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302 | |||
303 | mov esi, eax ;esi - splitted block |
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304 | |||
305 | mov [esi+block_next], edi |
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306 | mov eax, [edi+block_prev] |
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307 | mov [esi+block_prev], eax |
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308 | mov [edi+block_prev], esi |
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309 | mov [esi+list_fd], 0 |
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310 | mov [esi+list_bk], 0 |
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311 | and eax, eax |
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312 | jz @f |
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313 | mov [eax+block_next], esi |
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314 | @@: |
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315 | mov ebx, [edi+block_base] |
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316 | mov [esi+block_base], ebx |
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317 | mov edx, [size] |
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318 | mov [esi+block_size], edx |
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319 | add [edi+block_base], edx |
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320 | sub [edi+block_size], edx |
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321 | |||
322 | mov eax, [edi+block_size] |
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323 | shr eax, 12 |
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324 | sub eax, 1 |
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325 | cmp eax, 63 |
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326 | jna @f |
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327 | mov eax, 63 |
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328 | @@: |
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329 | cmp eax, [block_ind] |
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330 | je .m_eq_ind |
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331 | |||
332 | remove_from_list edi |
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333 | |||
334 | mov ecx, [block_ind] |
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335 | mov [mem_block_list+ecx*4], edx |
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336 | |||
337 | test edx, edx |
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338 | jnz @f |
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339 | btr [mem_block_mask], ecx |
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340 | @@: |
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341 | mov edx, [mem_block_list+eax*4] |
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342 | mov [edi+list_fd], edx |
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343 | test edx, edx |
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344 | jz @f |
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345 | mov [edx+list_bk], edi |
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346 | @@: |
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347 | mov [mem_block_list+eax*4], edi |
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348 | bts [mem_block_mask], eax |
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349 | .m_eq_ind: |
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350 | mov ecx, mem_used.fd-MEM_LIST_OFFSET |
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351 | mov edx, [ecx+list_fd] |
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352 | mov [esi+list_fd], edx |
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353 | mov [esi+list_bk], ecx |
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354 | mov [ecx+list_fd], esi |
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355 | mov [edx+list_bk], esi |
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356 | |||
357 | mov [esi+block_flags], USED_BLOCK |
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358 | mov eax, [esi+block_base] |
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359 | mov ebx, [size] |
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360 | sub [heap_free], ebx |
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361 | and [heap_mutex], 0 |
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362 | pop edi |
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363 | pop esi |
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364 | pop ebx |
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365 | ret |
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366 | .m_eq_size: |
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367 | remove_from_list edi |
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368 | mov [mem_block_list+ebx*4], edx |
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369 | and edx, edx |
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370 | jnz @f |
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371 | btr [mem_block_mask], ebx |
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372 | @@: |
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373 | mov ecx, mem_used.fd-MEM_LIST_OFFSET |
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374 | mov edx, [ecx+list_fd] |
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375 | mov [edi+list_fd], edx |
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376 | mov [edi+list_bk], ecx |
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377 | mov [ecx+list_fd], edi |
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378 | mov [edx+list_bk], edi |
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379 | |||
380 | mov [edi+block_flags], USED_BLOCK |
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381 | mov eax, [edi+block_base] |
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382 | mov ebx, [size] |
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383 | sub [heap_free], ebx |
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384 | and [heap_mutex], 0 |
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385 | pop edi |
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386 | pop esi |
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387 | pop ebx |
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388 | ret |
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389 | .error: |
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390 | xor eax, eax |
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391 | mov [heap_mutex], eax |
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392 | pop edi |
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393 | pop esi |
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394 | pop ebx |
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395 | ret |
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396 | endp |
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397 | |||
398 | align 4 |
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399 | proc free_kernel_space stdcall uses ebx ecx edx esi edi, base:dword |
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400 | push ebx |
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401 | push esi |
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402 | push edi |
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403 | mov ebx, heap_mutex |
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404 | call wait_mutex ;ebx |
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405 | |||
406 | mov eax, [base] |
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407 | mov esi, [mem_used.fd] |
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408 | @@: |
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409 | cmp esi, mem_used.fd-MEM_LIST_OFFSET |
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410 | je .fail |
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411 | |||
412 | cmp [esi+block_base], eax |
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413 | je .found |
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414 | mov esi, [esi+list_fd] |
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415 | jmp @b |
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416 | .found: |
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417 | cmp [esi+block_flags], USED_BLOCK |
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418 | jne .fail |
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419 | |||
420 | mov eax, [esi+block_size] |
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421 | add [heap_free], eax |
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422 | |||
423 | mov edi, [esi+block_next] |
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424 | test edi, edi |
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425 | jz .prev |
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426 | |||
427 | cmp [edi+block_flags], FREE_BLOCK |
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428 | jne .prev |
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429 | |||
430 | remove_from_free edi |
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431 | |||
432 | mov edx, [edi+block_next] |
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433 | mov [esi+block_next], edx |
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434 | test edx, edx |
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435 | jz @f |
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436 | |||
437 | mov [edx+block_prev], esi |
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438 | @@: |
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439 | mov ecx, [edi+block_size] |
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440 | add [esi+block_size], ecx |
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441 | |||
442 | mov eax, edi |
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443 | call free_mem_block |
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444 | .prev: |
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445 | mov edi, [esi+block_prev] |
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446 | test edi, edi |
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447 | jz .insert |
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448 | |||
449 | cmp [edi+block_flags], FREE_BLOCK |
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450 | jne .insert |
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451 | |||
452 | remove_from_used esi |
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453 | |||
454 | mov edx, [esi+block_next] |
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455 | mov [edi+block_next], edx |
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456 | test edx, edx |
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457 | jz @f |
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458 | mov [edx+block_prev], edi |
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459 | @@: |
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460 | mov eax, esi |
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461 | call free_mem_block |
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462 | |||
463 | mov ecx, [edi+block_size] |
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464 | mov eax, [esi+block_size] |
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465 | add eax, ecx |
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466 | mov [edi+block_size], eax |
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467 | |||
468 | calc_index eax |
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469 | calc_index ecx |
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470 | cmp eax, ecx |
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471 | je .m_eq |
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472 | |||
473 | push ecx |
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474 | remove_from_list edi |
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475 | pop ecx |
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476 | |||
477 | cmp [mem_block_list+ecx*4], edi |
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478 | jne @f |
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479 | mov [mem_block_list+ecx*4], edx |
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480 | @@: |
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481 | cmp [mem_block_list+ecx*4], 0 |
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482 | jne @f |
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483 | btr [mem_block_mask], ecx |
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484 | @@: |
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485 | mov esi, [mem_block_list+eax*4] |
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486 | mov [mem_block_list+eax*4], edi |
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487 | mov [edi+list_fd], esi |
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488 | test esi, esi |
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489 | jz @f |
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490 | mov [esi+list_bk], edi |
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491 | @@: |
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492 | bts [mem_block_mask], eax |
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493 | .m_eq: |
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494 | xor eax, eax |
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495 | mov [heap_mutex], eax |
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496 | dec eax |
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497 | pop edi |
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498 | pop esi |
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499 | pop ebx |
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500 | ret |
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501 | .insert: |
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502 | remove_from_used esi |
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503 | |||
504 | mov eax, [esi+block_size] |
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505 | calc_index eax |
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506 | |||
507 | mov edi, [mem_block_list+eax*4] |
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508 | mov [mem_block_list+eax*4], esi |
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509 | mov [esi+list_fd], edi |
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510 | test edi, edi |
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511 | jz @f |
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512 | mov [edi+list_bk], esi |
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513 | @@: |
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514 | bts [mem_block_mask], eax |
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515 | mov [esi+block_flags],FREE_BLOCK |
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516 | xor eax, eax |
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517 | mov [heap_mutex], eax |
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518 | dec eax |
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519 | pop edi |
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520 | pop esi |
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521 | pop ebx |
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522 | ret |
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523 | .fail: |
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524 | xor eax, eax |
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525 | mov [heap_mutex], eax |
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526 | pop edi |
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527 | pop esi |
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528 | pop ebx |
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529 | ret |
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530 | endp |
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531 | |||
532 | align 4 |
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533 | proc kernel_alloc stdcall, size:dword |
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534 | locals |
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535 | lin_addr dd ? |
||
536 | pages_count dd ? |
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537 | endl |
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538 | |||
539 | push ebx |
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540 | push edi |
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541 | push edx |
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542 | |||
543 | mov eax, [size] |
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544 | add eax, 4095 |
||
545 | and eax, not 4095; |
||
546 | mov [size], eax |
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547 | and eax, eax |
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548 | jz .err |
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549 | mov ebx, eax |
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550 | shr ebx, 12 |
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551 | mov [pages_count], ebx |
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552 | |||
553 | stdcall alloc_kernel_space, eax |
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554 | test eax, eax |
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555 | jz .err |
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556 | mov [lin_addr], eax |
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557 | |||
558 | mov ecx, [pages_count] |
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559 | mov edx, eax |
||
560 | mov ebx, ecx |
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561 | |||
562 | shr ecx, 3 |
||
563 | jz .next |
||
564 | |||
565 | and ebx, not 7 |
||
566 | push ebx |
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567 | stdcall alloc_pages, ebx |
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568 | pop ecx ; yes ecx!!! |
||
569 | and eax, eax |
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570 | jz .err |
||
571 | |||
572 | mov edi, eax |
||
573 | mov edx, [lin_addr] |
||
574 | @@: |
||
575 | stdcall map_page,edx,edi,dword PG_SW |
||
576 | add edx, 0x1000 |
||
577 | add edi, 0x1000 |
||
578 | dec ecx |
||
579 | jnz @B |
||
580 | .next: |
||
581 | mov ecx, [pages_count] |
||
582 | and ecx, 7 |
||
583 | jz .end |
||
584 | @@: |
||
585 | push ecx |
||
586 | call alloc_page |
||
587 | pop ecx |
||
588 | test eax, eax |
||
589 | jz .err |
||
590 | |||
591 | stdcall map_page,edx,eax,dword PG_SW |
||
592 | add edx, 0x1000 |
||
593 | dec ecx |
||
594 | jnz @B |
||
595 | .end: |
||
596 | mov eax, [lin_addr] |
||
597 | pop edx |
||
598 | pop edi |
||
599 | pop ebx |
||
600 | ret |
||
601 | .err: |
||
602 | xor eax, eax |
||
603 | pop edx |
||
604 | pop edi |
||
605 | pop ebx |
||
606 | ret |
||
607 | endp |
||
608 | |||
609 | align 4 |
||
610 | proc kernel_free stdcall, base:dword |
||
611 | push ebx esi |
||
612 | |||
613 | mov ebx, heap_mutex |
||
614 | call wait_mutex ;ebx |
||
615 | |||
616 | mov eax, [base] |
||
617 | mov esi, [mem_used.fd] |
||
618 | @@: |
||
619 | cmp esi, mem_used.fd-MEM_LIST_OFFSET |
||
620 | je .fail |
||
621 | |||
622 | cmp [esi+block_base], eax |
||
623 | je .found |
||
624 | mov esi, [esi+list_fd] |
||
625 | jmp @b |
||
626 | .found: |
||
627 | cmp [esi+block_flags], USED_BLOCK |
||
628 | jne .fail |
||
629 | |||
630 | and [heap_mutex], 0 |
||
631 | |||
632 | push ecx |
||
633 | mov ecx, [esi+block_size]; |
||
634 | shr ecx, 12 |
||
635 | call release_pages ;eax, ecx |
||
636 | pop ecx |
||
637 | stdcall free_kernel_space, [base] |
||
638 | pop esi ebx |
||
639 | ret |
||
640 | .fail: |
||
641 | and [heap_mutex], 0 |
||
642 | pop esi ebx |
||
643 | ret |
||
644 | endp |
||
645 | |||
646 | restore block_next |
||
647 | restore block_prev |
||
648 | restore block_list |
||
649 | restore block_base |
||
650 | restore block_size |
||
651 | restore block_flags |
||
652 | |||
653 | ;;;;;;;;;;;;;; USER ;;;;;;;;;;;;;;;;; |
||
654 | |||
655 | HEAP_TOP equ 0x5FC00000 |
||
656 | |||
657 | align 4 |
||
658 | proc init_heap |
||
659 | |||
660 | mov ebx,[current_slot] |
||
661 | mov eax, [ebx+APPDATA.heap_top] |
||
662 | test eax, eax |
||
663 | jz @F |
||
664 | sub eax,[ebx+APPDATA.heap_base] |
||
665 | sub eax, 4096 |
||
666 | ret |
||
667 | @@: |
||
668 | mov esi, [ebx+APPDATA.mem_size] |
||
669 | add esi, 4095 |
||
670 | and esi, not 4095 |
||
671 | mov [ebx+APPDATA.mem_size], esi |
||
672 | mov eax, HEAP_TOP |
||
673 | mov [ebx+APPDATA.heap_base], esi |
||
674 | mov [ebx+APPDATA.heap_top], eax |
||
675 | |||
676 | sub eax, esi |
||
677 | shr esi, 10 |
||
678 | mov ecx, eax |
||
679 | sub eax, 4096 |
||
680 | or ecx, FREE_BLOCK |
||
681 | mov [page_tabs+esi], ecx |
||
682 | ret |
||
683 | endp |
||
684 | |||
685 | align 4 |
||
686 | proc user_alloc stdcall, alloc_size:dword |
||
687 | |||
688 | push ebx |
||
689 | push esi |
||
690 | push edi |
||
691 | |||
692 | mov ecx, [alloc_size] |
||
693 | add ecx, (4095+4096) |
||
694 | and ecx, not 4095 |
||
695 | |||
696 | mov ebx, [current_slot] |
||
697 | mov esi, dword [ebx+APPDATA.heap_base] ; heap_base |
||
698 | mov edi, dword [ebx+APPDATA.heap_top] ; heap_top |
||
699 | l_0: |
||
700 | cmp esi, edi |
||
701 | jae m_exit |
||
702 | |||
703 | mov ebx, esi |
||
704 | shr ebx, 12 |
||
705 | mov eax, [page_tabs+ebx*4] |
||
706 | test al, FREE_BLOCK |
||
707 | jz test_used |
||
708 | and eax, 0xFFFFF000 |
||
709 | cmp eax, ecx ;alloc_size |
||
710 | jb m_next |
||
711 | jz @f |
||
712 | |||
713 | lea edx, [esi+ecx] |
||
714 | sub eax, ecx |
||
715 | or al, FREE_BLOCK |
||
716 | shr edx, 12 |
||
717 | mov [page_tabs+edx*4], eax |
||
718 | @@: |
||
719 | or ecx, USED_BLOCK |
||
720 | mov [page_tabs+ebx*4], ecx |
||
721 | shr ecx, 12 |
||
722 | inc ebx |
||
723 | dec ecx |
||
724 | jz .no |
||
725 | @@: |
||
726 | mov dword [page_tabs+ebx*4], 2 |
||
727 | inc ebx |
||
728 | dec ecx |
||
729 | jnz @B |
||
730 | .no: |
||
731 | |||
732 | mov edx, [current_slot] |
||
733 | mov ebx, [alloc_size] |
||
734 | add ebx, 0xFFF |
||
735 | and ebx, not 0xFFF |
||
736 | add ebx, [edx+APPDATA.mem_size] |
||
737 | call update_mem_size |
||
738 | |||
739 | lea eax, [esi+4096] |
||
740 | |||
741 | pop edi |
||
742 | pop esi |
||
743 | pop ebx |
||
744 | ret |
||
745 | test_used: |
||
746 | test al, USED_BLOCK |
||
747 | jz m_exit |
||
748 | |||
749 | and eax, 0xFFFFF000 |
||
750 | m_next: |
||
751 | add esi, eax |
||
752 | jmp l_0 |
||
753 | m_exit: |
||
754 | xor eax, eax |
||
755 | pop edi |
||
756 | pop esi |
||
757 | pop ebx |
||
758 | ret |
||
759 | endp |
||
760 | |||
761 | align 4 |
||
762 | proc user_free stdcall, base:dword |
||
763 | |||
764 | push esi |
||
765 | |||
766 | mov esi, [base] |
||
767 | test esi, esi |
||
768 | jz .exit |
||
769 | |||
770 | push ebx |
||
771 | |||
772 | xor ebx, ebx |
||
773 | shr esi, 12 |
||
774 | mov eax, [page_tabs+(esi-1)*4] |
||
775 | test al, USED_BLOCK |
||
776 | jz .cantfree |
||
777 | test al, DONT_FREE_BLOCK |
||
778 | jnz .cantfree |
||
779 | |||
780 | and eax, not 4095 |
||
781 | mov ecx, eax |
||
782 | or al, FREE_BLOCK |
||
783 | mov [page_tabs+(esi-1)*4], eax |
||
784 | sub ecx, 4096 |
||
785 | mov ebx, ecx |
||
786 | shr ecx, 12 |
||
787 | jz .released |
||
788 | .release: |
||
789 | xor eax, eax |
||
790 | xchg eax, [page_tabs+esi*4] |
||
791 | test al, 1 |
||
792 | jz @F |
||
793 | test eax, PG_SHARED |
||
794 | jnz @F |
||
795 | call free_page |
||
796 | mov eax, esi |
||
797 | shl eax, 12 |
||
798 | invlpg [eax] |
||
799 | @@: |
||
800 | inc esi |
||
801 | dec ecx |
||
802 | jnz .release |
||
803 | .released: |
||
804 | push edi |
||
805 | |||
806 | mov edx, [current_slot] |
||
807 | mov esi, dword [edx+APPDATA.heap_base] |
||
808 | mov edi, dword [edx+APPDATA.heap_top] |
||
809 | sub ebx, [edx+APPDATA.mem_size] |
||
810 | neg ebx |
||
811 | call update_mem_size |
||
812 | call user_normalize |
||
813 | pop edi |
||
814 | pop ebx |
||
815 | pop esi |
||
816 | ret |
||
817 | .exit: |
||
818 | xor eax, eax |
||
819 | inc eax |
||
820 | pop esi |
||
821 | ret |
||
822 | .cantfree: |
||
823 | xor eax, eax |
||
824 | pop ebx |
||
825 | pop esi |
||
826 | ret |
||
827 | endp |
||
828 | |||
829 | user_normalize: |
||
830 | ; in: esi=heap_base, edi=heap_top |
||
831 | ; out: eax=0 <=> OK |
||
832 | ; destroys: ebx,edx,esi,edi |
||
833 | shr esi, 12 |
||
834 | shr edi, 12 |
||
835 | @@: |
||
836 | mov eax, [page_tabs+esi*4] |
||
837 | test al, USED_BLOCK |
||
838 | jz .test_free |
||
839 | shr eax, 12 |
||
840 | add esi, eax |
||
841 | jmp @B |
||
842 | .test_free: |
||
843 | test al, FREE_BLOCK |
||
844 | jz .err |
||
845 | mov edx, eax |
||
846 | shr edx, 12 |
||
847 | add edx, esi |
||
848 | cmp edx, edi |
||
849 | jae .exit |
||
850 | |||
851 | mov ebx, [page_tabs+edx*4] |
||
852 | test bl, USED_BLOCK |
||
853 | jz .next_free |
||
854 | |||
855 | shr ebx, 12 |
||
856 | add edx, ebx |
||
857 | mov esi, edx |
||
858 | jmp @B |
||
859 | .next_free: |
||
860 | test bl, FREE_BLOCK |
||
861 | jz .err |
||
862 | and dword [page_tabs+edx*4], 0 |
||
863 | add eax, ebx |
||
864 | and eax, not 4095 |
||
865 | or eax, FREE_BLOCK |
||
866 | mov [page_tabs+esi*4], eax |
||
867 | jmp @B |
||
868 | .exit: |
||
869 | xor eax, eax |
||
870 | inc eax |
||
871 | ret |
||
872 | .err: |
||
873 | xor eax, eax |
||
874 | ret |
||
875 | |||
876 | user_realloc: |
||
877 | ; in: eax = pointer, ebx = new size |
||
878 | ; out: eax = new pointer or NULL |
||
879 | test eax, eax |
||
880 | jnz @f |
||
881 | ; realloc(NULL,sz) - same as malloc(sz) |
||
882 | push ebx |
||
883 | call user_alloc |
||
884 | ret |
||
885 | @@: |
||
886 | push ecx edx |
||
887 | lea ecx, [eax - 0x1000] |
||
888 | shr ecx, 12 |
||
889 | mov edx, [page_tabs+ecx*4] |
||
890 | test dl, USED_BLOCK |
||
891 | jnz @f |
||
892 | ; attempt to realloc invalid pointer |
||
893 | .ret0: |
||
894 | pop edx ecx |
||
895 | xor eax, eax |
||
896 | ret |
||
897 | @@: |
||
898 | test dl, DONT_FREE_BLOCK |
||
899 | jnz .ret0 |
||
900 | add ebx, 0x1FFF |
||
901 | shr edx, 12 |
||
902 | shr ebx, 12 |
||
903 | ; edx = allocated size, ebx = new size |
||
904 | add edx, ecx |
||
905 | add ebx, ecx |
||
906 | cmp edx, ebx |
||
907 | jb .realloc_add |
||
908 | ; release part of allocated memory |
||
909 | .loop: |
||
910 | cmp edx, ebx |
||
911 | jz .release_done |
||
912 | dec edx |
||
913 | xor eax, eax |
||
914 | xchg eax, [page_tabs+edx*4] |
||
915 | test al, 1 |
||
916 | jz .loop |
||
917 | call free_page |
||
918 | mov eax, edx |
||
919 | shl eax, 12 |
||
920 | invlpg [eax] |
||
921 | jmp .loop |
||
922 | .release_done: |
||
923 | sub ebx, ecx |
||
924 | cmp ebx, 1 |
||
925 | jnz .nofreeall |
||
926 | mov eax, [page_tabs+ecx*4] |
||
927 | and eax, not 0xFFF |
||
928 | mov edx, [current_slot] |
||
929 | mov ebx, [APPDATA.mem_size+edx] |
||
930 | sub ebx, eax |
||
931 | add ebx, 0x1000 |
||
932 | or al, FREE_BLOCK |
||
933 | mov [page_tabs+ecx*4], eax |
||
934 | push esi edi |
||
935 | mov esi, [APPDATA.heap_base+edx] |
||
936 | mov edi, [APPDATA.heap_top+edx] |
||
937 | call update_mem_size |
||
938 | call user_normalize |
||
939 | pop edi esi |
||
940 | jmp .ret0 ; all freed |
||
941 | .nofreeall: |
||
942 | sub edx, ecx |
||
943 | shl ebx, 12 |
||
944 | or ebx, USED_BLOCK |
||
945 | xchg [page_tabs+ecx*4], ebx |
||
946 | shr ebx, 12 |
||
947 | sub ebx, edx |
||
948 | push ebx ecx edx |
||
949 | mov edx, [current_slot] |
||
950 | shl ebx, 12 |
||
951 | sub ebx, [APPDATA.mem_size+edx] |
||
952 | neg ebx |
||
953 | call update_mem_size |
||
954 | pop edx ecx ebx |
||
955 | lea eax, [ecx+1] |
||
956 | shl eax, 12 |
||
957 | push eax |
||
958 | add ecx, edx |
||
959 | lea edx, [ecx+ebx] |
||
960 | shl ebx, 12 |
||
961 | jz .ret |
||
962 | push esi |
||
963 | mov esi, [current_slot] |
||
964 | mov esi, [APPDATA.heap_top+esi] |
||
965 | shr esi, 12 |
||
966 | @@: |
||
967 | cmp edx, esi |
||
968 | jae .merge_done |
||
969 | mov eax, [page_tabs+edx*4] |
||
970 | test al, USED_BLOCK |
||
971 | jnz .merge_done |
||
972 | and dword [page_tabs+edx*4], 0 |
||
973 | shr eax, 12 |
||
974 | add edx, eax |
||
975 | shl eax, 12 |
||
976 | add ebx, eax |
||
977 | jmp @b |
||
978 | .merge_done: |
||
979 | pop esi |
||
980 | or ebx, FREE_BLOCK |
||
981 | mov [page_tabs+ecx*4], ebx |
||
982 | .ret: |
||
983 | pop eax edx ecx |
||
984 | ret |
||
985 | .realloc_add: |
||
986 | ; get some additional memory |
||
987 | mov eax, [current_slot] |
||
988 | mov eax, [APPDATA.heap_top+eax] |
||
989 | shr eax, 12 |
||
990 | cmp edx, eax |
||
991 | jae .cant_inplace |
||
992 | mov eax, [page_tabs+edx*4] |
||
993 | test al, FREE_BLOCK |
||
994 | jz .cant_inplace |
||
995 | shr eax, 12 |
||
996 | add eax, edx |
||
997 | sub eax, ebx |
||
998 | jb .cant_inplace |
||
999 | jz @f |
||
1000 | shl eax, 12 |
||
1001 | or al, FREE_BLOCK |
||
1002 | mov [page_tabs+ebx*4], eax |
||
1003 | @@: |
||
1004 | mov eax, ebx |
||
1005 | sub eax, ecx |
||
1006 | shl eax, 12 |
||
1007 | or al, USED_BLOCK |
||
1008 | mov [page_tabs+ecx*4], eax |
||
1009 | lea eax, [ecx+1] |
||
1010 | shl eax, 12 |
||
1011 | push eax |
||
1012 | push edi |
||
1013 | lea edi, [page_tabs+edx*4] |
||
1014 | mov eax, 2 |
||
1015 | sub ebx, edx |
||
1016 | mov ecx, ebx |
||
1017 | cld |
||
1018 | rep stosd |
||
1019 | pop edi |
||
1020 | mov edx, [current_slot] |
||
1021 | shl ebx, 12 |
||
1022 | add ebx, [APPDATA.mem_size+edx] |
||
1023 | call update_mem_size |
||
1024 | pop eax edx ecx |
||
1025 | ret |
||
1026 | .cant_inplace: |
||
1027 | push esi edi |
||
1028 | mov eax, [current_slot] |
||
1029 | mov esi, [APPDATA.heap_base+eax] |
||
1030 | mov edi, [APPDATA.heap_top+eax] |
||
1031 | shr esi, 12 |
||
1032 | shr edi, 12 |
||
1033 | sub ebx, ecx |
||
1034 | .find_place: |
||
1035 | cmp esi, edi |
||
1036 | jae .place_not_found |
||
1037 | mov eax, [page_tabs+esi*4] |
||
1038 | test al, FREE_BLOCK |
||
1039 | jz .next_place |
||
1040 | shr eax, 12 |
||
1041 | cmp eax, ebx |
||
1042 | jae .place_found |
||
1043 | add esi, eax |
||
1044 | jmp .find_place |
||
1045 | .next_place: |
||
1046 | shr eax, 12 |
||
1047 | add esi, eax |
||
1048 | jmp .find_place |
||
1049 | .place_not_found: |
||
1050 | pop edi esi |
||
1051 | jmp .ret0 |
||
1052 | .place_found: |
||
1053 | sub eax, ebx |
||
1054 | jz @f |
||
1055 | push esi |
||
1056 | add esi, ebx |
||
1057 | shl eax, 12 |
||
1058 | or al, FREE_BLOCK |
||
1059 | mov [page_tabs+esi*4], eax |
||
1060 | pop esi |
||
1061 | @@: |
||
1062 | mov eax, ebx |
||
1063 | shl eax, 12 |
||
1064 | or al, USED_BLOCK |
||
1065 | mov [page_tabs+esi*4], eax |
||
1066 | inc esi |
||
1067 | mov eax, esi |
||
1068 | shl eax, 12 |
||
1069 | push eax |
||
1070 | mov eax, [page_tabs+ecx*4] |
||
1071 | and eax, not 0xFFF |
||
1072 | or al, FREE_BLOCK |
||
1073 | sub edx, ecx |
||
1074 | mov [page_tabs+ecx*4], eax |
||
1075 | inc ecx |
||
1076 | dec ebx |
||
1077 | dec edx |
||
1078 | jz .no |
||
1079 | @@: |
||
1080 | xor eax, eax |
||
1081 | xchg eax, [page_tabs+ecx*4] |
||
1082 | mov [page_tabs+esi*4], eax |
||
1083 | mov eax, ecx |
||
1084 | shl eax, 12 |
||
1085 | invlpg [eax] |
||
1086 | inc esi |
||
1087 | inc ecx |
||
1088 | dec ebx |
||
1089 | dec edx |
||
1090 | jnz @b |
||
1091 | .no: |
||
1092 | push ebx |
||
1093 | mov edx, [current_slot] |
||
1094 | shl ebx, 12 |
||
1095 | add ebx, [APPDATA.mem_size+edx] |
||
1096 | call update_mem_size |
||
1097 | pop ebx |
||
1098 | @@: |
||
1099 | mov dword [page_tabs+esi*4], 2 |
||
1100 | inc esi |
||
1101 | dec ebx |
||
1102 | jnz @b |
||
1103 | pop eax edi esi edx ecx |
||
1104 | ret |
||
1105 | |||
1106 | if 0 |
||
1107 | align 4 |
||
1108 | proc alloc_dll |
||
1109 | pushf |
||
1110 | cli |
||
1111 | bsf eax, [dll_map] |
||
1112 | jnz .find |
||
1113 | popf |
||
1114 | xor eax, eax |
||
1115 | ret |
||
1116 | .find: |
||
1117 | btr [dll_map], eax |
||
1118 | popf |
||
1119 | shl eax, 5 |
||
1120 | add eax, dll_tab |
||
1121 | ret |
||
1122 | endp |
||
1123 | |||
1124 | align 4 |
||
1125 | proc alloc_service |
||
1126 | pushf |
||
1127 | cli |
||
1128 | bsf eax, [srv_map] |
||
1129 | jnz .find |
||
1130 | popf |
||
1131 | xor eax, eax |
||
1132 | ret |
||
1133 | .find: |
||
1134 | btr [srv_map], eax |
||
1135 | popf |
||
1136 | shl eax,0x02 |
||
1137 | lea eax,[srv_tab+eax+eax*8] ;srv_tab+eax*36 |
||
1138 | ret |
||
1139 | endp |
||
1140 | |||
1141 | end if |
||
1142 | |||
1143 | |||
1144 | ;;;;;;;;;;;;;; SHARED ;;;;;;;;;;;;;;;;; |
||
1145 | |||
1146 | |||
1147 | ; param |
||
1148 | ; eax= shm_map object |
||
1149 | |||
1150 | align 4 |
||
1151 | destroy_smap: |
||
1152 | |||
1153 | pushfd |
||
1154 | cli |
||
1155 | |||
1156 | push esi |
||
1157 | push edi |
||
1158 | |||
1159 | mov edi, eax |
||
1160 | mov esi, [eax+SMAP.parent] |
||
1161 | test esi, esi |
||
1162 | jz .done |
||
1163 | |||
1164 | lock dec [esi+SMEM.refcount] |
||
1165 | jnz .done |
||
1166 | |||
1167 | mov ecx, [esi+SMEM.bk] |
||
1168 | mov edx, [esi+SMEM.fd] |
||
1169 | |||
1170 | mov [ecx+SMEM.fd], edx |
||
1171 | mov [edx+SMEM.bk], ecx |
||
1172 | |||
1173 | stdcall kernel_free, [esi+SMEM.base] |
||
1174 | mov eax, esi |
||
1175 | call free |
||
1176 | .done: |
||
1177 | mov eax, edi |
||
1178 | call destroy_kernel_object |
||
1179 | |||
1180 | pop edi |
||
1181 | pop esi |
||
1182 | popfd |
||
1183 | |||
1184 | ret |
||
1185 | |||
1186 | E_NOTFOUND equ 5 |
||
1187 | E_ACCESS equ 10 |
||
1188 | E_NOMEM equ 30 |
||
1189 | E_PARAM equ 33 |
||
1190 | |||
1191 | SHM_READ equ 0 |
||
1192 | SHM_WRITE equ 1 |
||
1193 | |||
1194 | SHM_ACCESS_MASK equ 3 |
||
1195 | |||
1196 | SHM_OPEN equ (0 shl 2) |
||
1197 | SHM_OPEN_ALWAYS equ (1 shl 2) |
||
1198 | SHM_CREATE equ (2 shl 2) |
||
1199 | |||
1200 | SHM_OPEN_MASK equ (3 shl 2) |
||
1201 | |||
1202 | align 4 |
||
1203 | proc shmem_open stdcall name:dword, size:dword, access:dword |
||
1204 | locals |
||
1205 | action dd ? |
||
1206 | owner_access dd ? |
||
1207 | mapped dd ? |
||
1208 | endl |
||
1209 | |||
1210 | push ebx |
||
1211 | push esi |
||
1212 | push edi |
||
1213 | |||
1214 | mov [mapped], 0 |
||
1215 | mov [owner_access], 0 |
||
1216 | |||
1217 | pushfd ;mutex required |
||
1218 | cli |
||
1219 | |||
1220 | mov eax, [access] |
||
1221 | and eax, SHM_OPEN_MASK |
||
1222 | mov [action], eax |
||
1223 | |||
1224 | mov eax, [name] |
||
1225 | test eax, eax |
||
1226 | mov edx, E_PARAM |
||
1227 | jz .exit |
||
1228 | |||
1229 | mov esi, [shmem_list.fd] |
||
1230 | align 4 |
||
1231 | @@: |
||
1232 | cmp esi, shmem_list |
||
1233 | je .not_found |
||
1234 | |||
1235 | lea edx, [esi+SMEM.name] ; link , base, size |
||
1236 | stdcall strncmp, edx, eax, 32 |
||
1237 | test eax, eax |
||
1238 | je .found |
||
1239 | |||
1240 | mov esi, [esi+SMEM.fd] |
||
1241 | jmp @B |
||
1242 | |||
1243 | .not_found: |
||
1244 | mov eax, [action] |
||
1245 | |||
1246 | cmp eax, SHM_OPEN |
||
1247 | mov edx, E_NOTFOUND |
||
1248 | je .exit |
||
1249 | |||
1250 | cmp eax, SHM_CREATE |
||
1251 | mov edx, E_PARAM |
||
1252 | je .create_shm |
||
1253 | |||
1254 | cmp eax, SHM_OPEN_ALWAYS |
||
1255 | jne .exit |
||
1256 | |||
1257 | .create_shm: |
||
1258 | |||
1259 | mov ecx, [size] |
||
1260 | test ecx, ecx |
||
1261 | jz .exit |
||
1262 | |||
1263 | add ecx, 4095 |
||
1264 | and ecx, -4096 |
||
1265 | mov [size], ecx |
||
1266 | |||
1267 | mov eax, SMEM.sizeof |
||
1268 | call malloc |
||
1269 | test eax, eax |
||
1270 | mov esi, eax |
||
1271 | mov edx, E_NOMEM |
||
1272 | jz .exit |
||
1273 | |||
1274 | stdcall kernel_alloc, [size] |
||
1275 | test eax, eax |
||
1276 | mov [mapped], eax |
||
1277 | mov edx, E_NOMEM |
||
1278 | jz .cleanup |
||
1279 | |||
1280 | mov ecx, [size] |
||
1281 | mov edx, [access] |
||
1282 | and edx, SHM_ACCESS_MASK |
||
1283 | |||
1284 | mov [esi+SMEM.base], eax |
||
1285 | mov [esi+SMEM.size], ecx |
||
1286 | mov [esi+SMEM.access], edx |
||
1287 | mov [esi+SMEM.refcount], 0 |
||
1288 | mov [esi+SMEM.name+28], 0 |
||
1289 | |||
1290 | lea eax, [esi+SMEM.name] |
||
1291 | stdcall strncpy, eax, [name], 31 |
||
1292 | |||
1293 | mov eax, [shmem_list.fd] |
||
1294 | mov [esi+SMEM.bk], shmem_list |
||
1295 | mov [esi+SMEM.fd], eax |
||
1296 | |||
1297 | mov [eax+SMEM.bk], esi |
||
1298 | mov [shmem_list.fd], esi |
||
1299 | |||
1300 | mov [action], SHM_OPEN |
||
1301 | mov [owner_access], SHM_WRITE |
||
1302 | |||
1303 | .found: |
||
1304 | mov eax, [action] |
||
1305 | |||
1306 | cmp eax, SHM_CREATE |
||
1307 | mov edx, E_ACCESS |
||
1308 | je .exit |
||
1309 | |||
1310 | cmp eax, SHM_OPEN |
||
1311 | mov edx, E_PARAM |
||
1312 | je .create_map |
||
1313 | |||
1314 | cmp eax, SHM_OPEN_ALWAYS |
||
1315 | jne .exit |
||
1316 | |||
1317 | .create_map: |
||
1318 | |||
1319 | mov eax, [access] |
||
1320 | and eax, SHM_ACCESS_MASK |
||
1321 | cmp eax, [esi+SMEM.access] |
||
1322 | mov [access], eax |
||
1323 | mov edx, E_ACCESS |
||
1324 | ja .exit |
||
1325 | |||
1326 | mov ebx, [CURRENT_TASK] |
||
1327 | shl ebx, 5 |
||
1328 | mov ebx, [CURRENT_TASK+ebx+4] |
||
1329 | mov eax, SMAP.sizeof |
||
1330 | |||
1331 | call create_kernel_object |
||
1332 | test eax, eax |
||
1333 | mov edi, eax |
||
1334 | mov edx, E_NOMEM |
||
1335 | jz .exit |
||
1336 | |||
1337 | mov [edi+SMAP.magic], 'SMAP' |
||
1338 | mov [edi+SMAP.destroy], destroy_smap |
||
1339 | mov [edi+SMAP.base], 0 |
||
1340 | mov [edi+SMAP.parent], 0 |
||
1341 | |||
1342 | stdcall user_alloc, [esi+SMEM.size] |
||
1343 | test eax, eax |
||
1344 | mov [mapped], eax |
||
1345 | mov edx, E_NOMEM |
||
1346 | jz .cleanup2 |
||
1347 | |||
1348 | lock inc [esi+SMEM.refcount] |
||
1349 | mov [edi+SMAP.base], eax |
||
1350 | mov [edi+SMAP.parent], esi |
||
1351 | |||
1352 | mov ecx, [esi+SMEM.size] |
||
1353 | mov [size], ecx |
||
1354 | |||
1355 | shr ecx, 12 |
||
1356 | shr eax, 10 |
||
1357 | |||
1358 | mov esi, [esi+SMEM.base] |
||
1359 | shr esi, 10 |
||
1360 | lea edi, [page_tabs+eax] |
||
1361 | add esi, page_tabs |
||
1362 | |||
1363 | mov edx, [access] |
||
1364 | or edx, [owner_access] |
||
1365 | shl edx, 1 |
||
1366 | or edx, PG_USER+PG_SHARED |
||
1367 | @@: |
||
1368 | lodsd |
||
1369 | and eax, 0xFFFFF000 |
||
1370 | or eax, edx |
||
1371 | stosd |
||
1372 | loop @B |
||
1373 | |||
1374 | xor edx, edx |
||
1375 | |||
1376 | cmp [owner_access], 0 |
||
1377 | jne .exit |
||
1378 | |||
1379 | mov edx, [size] |
||
1380 | .exit: |
||
1381 | mov eax, [mapped] |
||
1382 | |||
1383 | popfd |
||
1384 | pop edi |
||
1385 | pop esi |
||
1386 | pop ebx |
||
1387 | ret |
||
1388 | |||
1389 | .cleanup: |
||
1390 | mov eax, esi |
||
1391 | call free |
||
1392 | jmp .exit |
||
1393 | |||
1394 | .cleanup2: |
||
1395 | mov eax, edi |
||
1396 | call destroy_smap |
||
1397 | jmp .exit |
||
1398 | endp |
||
1399 | |||
1400 | align 4 |
||
1401 | proc shmem_close stdcall, name:dword |
||
1402 | |||
1403 | mov eax, [name] |
||
1404 | test eax, eax |
||
1405 | jz .fail |
||
1406 | |||
1407 | push esi |
||
1408 | push edi |
||
1409 | pushfd |
||
1410 | cli |
||
1411 | |||
1412 | mov esi, [current_slot] |
||
1413 | add esi, APP_OBJ_OFFSET |
||
1414 | .next: |
||
1415 | mov eax, [esi+APPOBJ.fd] |
||
1416 | test eax, eax |
||
1417 | jz @F |
||
1418 | |||
1419 | cmp eax, esi |
||
1420 | mov esi, eax |
||
1421 | je @F |
||
1422 | |||
1423 | cmp [eax+SMAP.magic], 'SMAP' |
||
1424 | jne .next |
||
1425 | |||
1426 | mov edi, [eax+SMAP.parent] |
||
1427 | test edi, edi |
||
1428 | jz .next |
||
1429 | |||
1430 | lea eax, [edi+SMEM.name] |
||
1431 | stdcall strncmp, [name], edi, 32 |
||
1432 | test eax, eax |
||
1433 | jne .next |
||
1434 | |||
1435 | stdcall user_free, [esi+SMAP.base] |
||
1436 | |||
1437 | call [esi+APPOBJ.destroy] |
||
1438 | @@: |
||
1439 | popfd |
||
1440 | pop edi |
||
1441 | pop esi |
||
1442 | .fail: |
||
1443 | ret |
||
1444 | endp=> |