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Rev | Author | Line No. | Line |
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2288 | clevermous | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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3 | ;; Copyright (C) KolibriOS team 2004-2009. 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: 2288 $ |
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9 | |||
10 | |||
11 | struc MEM_BLOCK |
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12 | { |
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13 | .list LHEAD |
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14 | .next_block dd ? ;+8 |
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15 | .prev_block dd ? ;+4 |
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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 | .sizeof: |
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21 | } |
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22 | |||
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 | |||
32 | block_next equ MEM_BLOCK.next_block |
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33 | block_prev equ MEM_BLOCK.prev_block |
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34 | list_fd equ MEM_BLOCK.list.next |
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35 | list_bk equ MEM_BLOCK.list.prev |
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36 | block_base equ MEM_BLOCK.base |
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37 | block_size equ MEM_BLOCK.size |
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38 | block_flags equ MEM_BLOCK.flags |
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39 | |||
40 | macro calc_index op |
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41 | { shr op, 12 |
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42 | dec op |
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43 | cmp op, 63 |
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44 | jna @f |
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45 | mov op, 63 |
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46 | @@: |
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47 | } |
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48 | |||
49 | align 4 |
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50 | md: |
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51 | .add_to_used: |
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52 | mov eax, [esi+block_base] |
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53 | mov ebx, [esi+block_base] |
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54 | shr ebx, 6 |
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55 | add eax, ebx |
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56 | shr ebx, 6 |
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57 | add eax, ebx |
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58 | shr eax, 12 |
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59 | and eax, 63 |
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60 | inc [mem_hash_cnt+eax*4] |
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61 | |||
62 | lea ecx, [mem_used_list+eax*8] |
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63 | list_add esi, ecx |
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64 | mov [esi+block_flags], USED_BLOCK |
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65 | mov eax, [esi+block_size] |
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66 | sub [heap_free], eax |
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67 | ret |
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68 | align 4 |
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69 | .find_used: |
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70 | mov ecx, eax |
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71 | mov ebx, eax |
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72 | shr ebx, 6 |
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73 | add ecx, ebx |
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74 | shr ebx, 6 |
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75 | add ecx, ebx |
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76 | shr ecx, 12 |
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77 | and ecx, 63 |
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78 | |||
79 | lea ebx, [mem_used_list+ecx*8] |
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80 | mov esi, ebx |
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81 | .next: |
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82 | mov esi, [esi+list_fd] |
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83 | cmp esi, ebx |
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84 | je .fail |
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85 | |||
86 | cmp eax, [esi+block_base] |
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87 | jne .next |
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88 | |||
89 | ret |
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90 | .fail: |
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91 | xor esi, esi |
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92 | ret |
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93 | |||
94 | align 4 |
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95 | .del_from_used: |
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96 | call .find_used |
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97 | test esi, esi |
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98 | jz .done |
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99 | |||
100 | cmp [esi+block_flags], USED_BLOCK |
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101 | jne .fatal |
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102 | |||
103 | dec [mem_hash_cnt+ecx*4] |
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104 | list_del esi |
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105 | .done: |
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106 | ret |
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107 | .fatal: ;FIXME panic here |
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108 | xor esi, esi |
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109 | ret |
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110 | |||
111 | ;Initial heap state |
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112 | ; |
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113 | ;+heap_size terminator USED_BLOCK |
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114 | ;+4096*MEM_BLOCK.sizeof free space FREE_BLOCK |
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115 | ;HEAP_BASE heap_descriptors USED_BLOCK |
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116 | ; |
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117 | |||
118 | align 4 |
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119 | proc init_kernel_heap |
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120 | |||
121 | mov ecx, 64 |
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122 | mov edi, mem_block_list |
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123 | @@: |
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124 | mov eax, edi |
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125 | stosd |
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126 | stosd |
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127 | loop @B |
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128 | |||
129 | mov ecx, 64 |
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130 | mov edi, mem_used_list |
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131 | @@: |
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132 | mov eax, edi |
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133 | stosd |
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134 | stosd |
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135 | loop @B |
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136 | |||
137 | stdcall alloc_pages, dword 32 |
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138 | mov ecx, 32 |
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139 | mov edx, eax |
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140 | mov edi, HEAP_BASE |
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141 | .l1: |
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142 | stdcall map_page, edi, edx, PG_SW |
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143 | add edi, 0x1000 |
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144 | add edx, 0x1000 |
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145 | dec ecx |
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146 | jnz .l1 |
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147 | |||
148 | mov edi, HEAP_BASE ;descriptors |
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149 | mov ebx, HEAP_BASE+MEM_BLOCK.sizeof ;free space |
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150 | mov ecx, HEAP_BASE+MEM_BLOCK.sizeof*2 ;terminator |
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151 | |||
152 | xor eax, eax |
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153 | mov [edi+block_next], ebx |
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154 | mov [edi+block_prev], eax |
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155 | mov [edi+list_fd], eax |
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156 | mov [edi+list_bk], eax |
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157 | mov [edi+block_base], HEAP_BASE |
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158 | mov [edi+block_size], 4096*MEM_BLOCK.sizeof |
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159 | mov [edi+block_flags], USED_BLOCK |
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160 | |||
161 | mov [ecx+block_next], eax |
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162 | mov [ecx+block_prev], ebx |
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163 | mov [edi+list_fd], eax |
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164 | mov [edi+list_bk], eax |
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165 | mov [edi+block_base], eax |
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166 | mov [edi+block_size], eax |
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167 | mov [edi+block_flags], USED_BLOCK |
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168 | |||
169 | mov [ebx+block_next], ecx |
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170 | mov [ebx+block_prev], edi |
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171 | mov [ebx+block_base], HEAP_BASE+4096*MEM_BLOCK.sizeof |
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172 | |||
173 | mov ecx, [pg_data.kernel_pages] |
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174 | shl ecx, 12 |
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175 | sub ecx, HEAP_BASE-OS_BASE+4096*MEM_BLOCK.sizeof |
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176 | mov [heap_size], ecx |
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177 | mov [heap_free], ecx |
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178 | mov [ebx+block_size], ecx |
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179 | mov [ebx+block_flags], FREE_BLOCK |
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180 | |||
181 | mov [mem_block_mask], eax |
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182 | mov [mem_block_mask+4], 0x80000000 |
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183 | |||
184 | mov ecx, mem_block_list+63*8 |
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185 | list_add ebx, ecx |
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186 | |||
187 | mov ecx, 4096-3-1 |
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188 | mov eax, HEAP_BASE+MEM_BLOCK.sizeof*4 |
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189 | |||
190 | mov [next_memblock], HEAP_BASE+MEM_BLOCK.sizeof*3 |
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191 | @@: |
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192 | mov [eax-MEM_BLOCK.sizeof], eax |
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193 | add eax, MEM_BLOCK.sizeof |
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194 | loop @B |
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195 | |||
196 | mov [eax-MEM_BLOCK.sizeof], dword 0 |
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197 | |||
198 | mov ecx, heap_mutex |
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199 | call mutex_init |
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200 | mov [heap_blocks], 4094 |
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201 | mov [free_blocks], 4093 |
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202 | ret |
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203 | endp |
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204 | |||
205 | ; param |
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206 | ; eax= required size |
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207 | ; |
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208 | ; retval |
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209 | ; edi= memory block descriptor |
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210 | ; ebx= descriptor index |
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211 | |||
212 | align 4 |
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213 | get_small_block: |
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214 | mov ecx, eax |
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215 | shr ecx, 12 |
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216 | dec ecx |
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217 | cmp ecx, 63 |
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218 | jle .get_index |
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219 | mov ecx, 63 |
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220 | .get_index: |
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221 | lea esi, [mem_block_mask] |
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222 | xor ebx, ebx |
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223 | or edx, -1 |
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224 | |||
225 | cmp ecx, 32 |
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226 | jb .bit_test |
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227 | |||
228 | sub ecx, 32 |
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229 | add ebx, 32 |
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230 | add esi, 4 |
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231 | .bit_test: |
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232 | shl edx, cl |
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233 | and edx, [esi] |
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234 | .find: |
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235 | bsf edi, edx |
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236 | jz .high_mask |
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237 | add ebx, edi |
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238 | lea ecx, [mem_block_list+ebx*8] |
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239 | mov edi, ecx |
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240 | .next: |
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241 | mov edi, [edi+list_fd] |
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242 | cmp edi, ecx |
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243 | je .err |
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244 | cmp eax, [edi+block_size] |
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245 | ja .next |
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246 | ret |
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247 | .err: |
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248 | xor edi, edi |
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249 | ret |
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250 | |||
251 | .high_mask: |
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252 | add esi, 4 |
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253 | cmp esi, mem_block_mask+8 |
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254 | jae .err |
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255 | add ebx, 32 |
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256 | mov edx, [esi] |
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257 | jmp .find |
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258 | |||
259 | |||
260 | align 4 |
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261 | free_mem_block: |
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262 | mov ebx, [next_memblock] |
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263 | mov [eax], ebx |
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264 | mov [next_memblock], eax |
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265 | xor ebx, ebx |
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266 | |||
267 | mov dword [eax+4], ebx |
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268 | mov dword [eax+8], ebx |
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269 | mov dword [eax+12], ebx |
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270 | mov dword [eax+16], ebx |
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271 | ; mov dword [eax+20], 0 ;don't clear block size |
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272 | mov dword [eax+24], ebx |
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273 | mov dword [eax+28], ebx |
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274 | inc [free_blocks] |
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275 | ret |
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276 | |||
277 | align 4 |
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278 | proc alloc_kernel_space stdcall, size:dword |
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279 | local block_ind:DWORD |
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280 | |||
281 | push ebx |
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282 | push esi |
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283 | push edi |
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284 | |||
285 | mov eax, [size] |
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286 | add eax, 4095 |
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287 | and eax, not 4095 |
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288 | mov [size], eax |
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289 | |||
290 | cmp eax, [heap_free] |
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291 | ja .error |
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292 | |||
293 | mov ecx, heap_mutex |
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294 | call mutex_lock |
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295 | |||
296 | mov eax, [size] |
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297 | |||
298 | call get_small_block ; eax |
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299 | test edi, edi |
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300 | jz .error_unlock |
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301 | |||
302 | cmp [edi+block_flags], FREE_BLOCK |
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303 | jne .error_unlock |
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304 | |||
305 | mov [block_ind], ebx ;index of allocated block |
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306 | |||
307 | mov eax, [edi+block_size] |
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308 | cmp eax, [size] |
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309 | je .m_eq_size |
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310 | |||
311 | mov esi, [next_memblock] ;new memory block |
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312 | test esi, esi |
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313 | jz .error_unlock |
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314 | |||
315 | dec [free_blocks] |
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316 | mov eax, [esi] |
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317 | mov [next_memblock], eax |
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318 | |||
319 | mov [esi+block_next], edi |
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320 | mov eax, [edi+block_prev] |
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321 | mov [esi+block_prev], eax |
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322 | mov [edi+block_prev], esi |
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323 | mov [esi+list_fd], 0 |
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324 | mov [esi+list_bk], 0 |
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325 | mov [eax+block_next], esi |
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326 | |||
327 | mov ebx, [edi+block_base] |
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328 | mov [esi+block_base], ebx |
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329 | mov edx, [size] |
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330 | mov [esi+block_size], edx |
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331 | add [edi+block_base], edx |
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332 | sub [edi+block_size], edx |
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333 | |||
334 | mov eax, [edi+block_size] |
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335 | calc_index eax |
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336 | cmp eax, [block_ind] |
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337 | je .add_used |
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338 | |||
339 | list_del edi |
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340 | |||
341 | mov ecx, [block_ind] |
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342 | lea edx, [mem_block_list+ecx*8] |
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343 | cmp edx, [edx] |
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344 | jnz @f |
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345 | btr [mem_block_mask], ecx |
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346 | @@: |
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347 | bts [mem_block_mask], eax |
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348 | lea edx, [mem_block_list+eax*8] ;edx= list head |
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349 | list_add edi, edx |
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350 | .add_used: |
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351 | |||
352 | call md.add_to_used |
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353 | |||
354 | mov ecx, heap_mutex |
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355 | call mutex_unlock |
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356 | mov eax, [esi+block_base] |
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357 | pop edi |
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358 | pop esi |
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359 | pop ebx |
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360 | ret |
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361 | |||
362 | .m_eq_size: |
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363 | list_del edi |
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364 | lea edx, [mem_block_list+ebx*8] |
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365 | cmp edx, [edx] |
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366 | jnz @f |
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367 | btr [mem_block_mask], ebx |
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368 | @@: |
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369 | mov esi, edi |
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370 | jmp .add_used |
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371 | |||
372 | .error_unlock: |
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373 | mov ecx, heap_mutex |
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374 | call mutex_unlock |
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375 | .error: |
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376 | xor eax, eax |
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377 | pop edi |
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378 | pop esi |
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379 | pop ebx |
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380 | ret |
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381 | endp |
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382 | |||
383 | align 4 |
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384 | proc free_kernel_space stdcall uses ebx ecx edx esi edi, base:dword |
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385 | |||
386 | mov ecx, heap_mutex |
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387 | call mutex_lock |
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388 | |||
389 | mov eax, [base] |
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390 | |||
391 | call md.del_from_used |
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392 | test esi, esi |
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393 | jz .fail |
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394 | |||
395 | mov eax, [esi+block_size] |
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396 | add [heap_free], eax |
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397 | |||
398 | mov edi, [esi+block_next] |
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399 | cmp [edi+block_flags], FREE_BLOCK |
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400 | jne .prev |
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401 | |||
402 | list_del edi |
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403 | |||
404 | mov edx, [edi+block_next] |
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405 | mov [esi+block_next], edx |
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406 | mov [edx+block_prev], esi |
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407 | mov ecx, [edi+block_size] |
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408 | add [esi+block_size], ecx |
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409 | |||
410 | calc_index ecx |
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411 | |||
412 | lea edx, [mem_block_list+ecx*8] |
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413 | cmp edx, [edx] |
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414 | jne @F |
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415 | btr [mem_block_mask], ecx |
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416 | @@: |
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417 | mov eax, edi |
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418 | call free_mem_block |
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419 | .prev: |
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420 | mov edi, [esi+block_prev] |
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421 | cmp [edi+block_flags], FREE_BLOCK |
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422 | jne .insert |
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423 | |||
424 | mov edx, [esi+block_next] |
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425 | mov [edi+block_next], edx |
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426 | mov [edx+block_prev], edi |
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427 | |||
428 | mov eax, esi |
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429 | call free_mem_block |
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430 | |||
431 | mov ecx, [edi+block_size] |
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432 | mov eax, [esi+block_size] |
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433 | add eax, ecx |
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434 | mov [edi+block_size], eax |
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435 | |||
436 | calc_index eax ;new index |
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437 | calc_index ecx ;old index |
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438 | cmp eax, ecx |
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439 | je .m_eq |
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440 | |||
441 | push ecx |
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442 | list_del edi |
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443 | pop ecx |
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444 | |||
445 | lea edx, [mem_block_list+ecx*8] |
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446 | cmp edx, [edx] |
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447 | jne .add_block |
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448 | btr [mem_block_mask], ecx |
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449 | .add_block: |
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450 | bts [mem_block_mask], eax |
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451 | lea edx, [mem_block_list+eax*8] |
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452 | list_add edi, edx |
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453 | .m_eq: |
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454 | mov ecx, heap_mutex |
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455 | call mutex_unlock |
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456 | xor eax, eax |
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457 | not eax |
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458 | ret |
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459 | .insert: |
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460 | mov [esi+block_flags], FREE_BLOCK |
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461 | mov eax, [esi+block_size] |
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462 | calc_index eax |
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463 | mov edi, esi |
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464 | jmp .add_block |
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465 | |||
466 | .fail: |
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467 | mov ecx, heap_mutex |
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468 | call mutex_unlock |
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469 | xor eax, eax |
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470 | ret |
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471 | endp |
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472 | |||
473 | align 4 |
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474 | proc kernel_alloc stdcall, size:dword |
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475 | locals |
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476 | lin_addr dd ? |
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477 | pages_count dd ? |
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478 | endl |
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479 | |||
480 | push ebx |
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481 | push edi |
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482 | |||
483 | mov eax, [size] |
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484 | add eax, 4095 |
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485 | and eax, not 4095; |
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486 | mov [size], eax |
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487 | and eax, eax |
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488 | jz .err |
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489 | mov ebx, eax |
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490 | shr ebx, 12 |
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491 | mov [pages_count], ebx |
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492 | |||
493 | stdcall alloc_kernel_space, eax |
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494 | test eax, eax |
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495 | jz .err |
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496 | mov [lin_addr], eax |
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497 | |||
498 | mov ecx, [pages_count] |
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499 | mov edx, eax |
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500 | mov ebx, ecx |
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501 | |||
502 | shr ecx, 3 |
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503 | jz .next |
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504 | |||
505 | and ebx, not 7 |
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506 | push ebx |
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507 | stdcall alloc_pages, ebx |
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508 | pop ecx ; yes ecx!!! |
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509 | and eax, eax |
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510 | jz .err |
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511 | |||
512 | mov edi, eax |
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513 | mov edx, [lin_addr] |
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514 | @@: |
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515 | stdcall map_page, edx, edi, dword PG_SW |
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516 | add edx, 0x1000 |
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517 | add edi, 0x1000 |
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518 | dec ecx |
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519 | jnz @B |
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520 | .next: |
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521 | mov ecx, [pages_count] |
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522 | and ecx, 7 |
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523 | jz .end |
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524 | @@: |
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525 | push ecx |
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526 | call alloc_page |
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527 | pop ecx |
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528 | test eax, eax |
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529 | jz .err |
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530 | |||
531 | stdcall map_page, edx, eax, dword PG_SW |
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532 | add edx, 0x1000 |
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533 | dec ecx |
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534 | jnz @B |
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535 | .end: |
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536 | mov eax, [lin_addr] |
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537 | pop edi |
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538 | pop ebx |
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539 | ret |
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540 | .err: |
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541 | xor eax, eax |
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542 | pop edi |
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543 | pop ebx |
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544 | ret |
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545 | endp |
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546 | |||
547 | align 4 |
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548 | proc kernel_free stdcall, base:dword |
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549 | |||
550 | push ebx esi |
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551 | |||
552 | mov ecx, heap_mutex |
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553 | call mutex_lock |
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554 | |||
555 | mov eax, [base] |
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556 | call md.find_used |
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557 | |||
558 | mov ecx, heap_mutex |
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559 | cmp [esi+block_flags], USED_BLOCK |
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560 | jne .fail |
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561 | |||
562 | call mutex_unlock |
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563 | |||
564 | mov eax, [esi+block_base] |
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565 | mov ecx, [esi+block_size] |
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566 | shr ecx, 12 |
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567 | call release_pages ;eax, ecx |
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568 | stdcall free_kernel_space, [base] |
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569 | pop esi ebx |
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570 | ret |
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571 | .fail: |
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572 | call mutex_unlock |
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573 | xor eax, eax |
||
574 | pop esi ebx |
||
575 | ret |
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576 | endp |
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577 | |||
578 | restore block_next |
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579 | restore block_prev |
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580 | restore block_list |
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581 | restore block_base |
||
582 | restore block_size |
||
583 | restore block_flags |
||
584 | |||
585 | ;;;;;;;;;;;;;; USER ;;;;;;;;;;;;;;;;; |
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586 | |||
587 | HEAP_TOP equ 0x5FC00000 |
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588 | |||
589 | align 4 |
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590 | proc init_heap |
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591 | |||
592 | mov ebx, [current_slot] |
||
593 | mov eax, [ebx+APPDATA.heap_top] |
||
594 | test eax, eax |
||
595 | jz @F |
||
596 | sub eax, [ebx+APPDATA.heap_base] |
||
597 | sub eax, 4096 |
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598 | ret |
||
599 | @@: |
||
600 | mov esi, [ebx+APPDATA.mem_size] |
||
601 | add esi, 4095 |
||
602 | and esi, not 4095 |
||
603 | mov [ebx+APPDATA.mem_size], esi |
||
604 | mov eax, HEAP_TOP |
||
605 | mov [ebx+APPDATA.heap_base], esi |
||
606 | mov [ebx+APPDATA.heap_top], eax |
||
607 | |||
608 | sub eax, esi |
||
609 | shr esi, 10 |
||
610 | mov ecx, eax |
||
611 | sub eax, 4096 |
||
612 | or ecx, FREE_BLOCK |
||
613 | mov [page_tabs+esi], ecx |
||
614 | ret |
||
615 | endp |
||
616 | |||
617 | align 4 |
||
618 | proc user_alloc stdcall, alloc_size:dword |
||
619 | |||
620 | push ebx |
||
621 | push esi |
||
622 | push edi |
||
623 | |||
624 | mov ecx, [alloc_size] |
||
625 | add ecx, (4095+4096) |
||
626 | and ecx, not 4095 |
||
627 | |||
628 | mov ebx, [current_slot] |
||
629 | mov esi, dword [ebx+APPDATA.heap_base] ; heap_base |
||
630 | mov edi, dword [ebx+APPDATA.heap_top] ; heap_top |
||
631 | l_0: |
||
632 | cmp esi, edi |
||
633 | jae m_exit |
||
634 | |||
635 | mov ebx, esi |
||
636 | shr ebx, 12 |
||
637 | mov eax, [page_tabs+ebx*4] |
||
638 | test al, FREE_BLOCK |
||
639 | jz test_used |
||
640 | and eax, 0xFFFFF000 |
||
641 | cmp eax, ecx ;alloc_size |
||
642 | jb m_next |
||
643 | jz @f |
||
644 | |||
645 | lea edx, [esi+ecx] |
||
646 | sub eax, ecx |
||
647 | or al, FREE_BLOCK |
||
648 | shr edx, 12 |
||
649 | mov [page_tabs+edx*4], eax |
||
650 | @@: |
||
651 | or ecx, USED_BLOCK |
||
652 | mov [page_tabs+ebx*4], ecx |
||
653 | shr ecx, 12 |
||
654 | inc ebx |
||
655 | dec ecx |
||
656 | jz .no |
||
657 | @@: |
||
658 | mov dword [page_tabs+ebx*4], 2 |
||
659 | inc ebx |
||
660 | dec ecx |
||
661 | jnz @B |
||
662 | .no: |
||
663 | |||
664 | mov edx, [current_slot] |
||
665 | mov ebx, [alloc_size] |
||
666 | add ebx, 0xFFF |
||
667 | and ebx, not 0xFFF |
||
668 | add ebx, [edx+APPDATA.mem_size] |
||
669 | call update_mem_size |
||
670 | |||
671 | lea eax, [esi+4096] |
||
672 | |||
673 | pop edi |
||
674 | pop esi |
||
675 | pop ebx |
||
676 | ret |
||
677 | test_used: |
||
678 | test al, USED_BLOCK |
||
679 | jz m_exit |
||
680 | |||
681 | and eax, 0xFFFFF000 |
||
682 | m_next: |
||
683 | add esi, eax |
||
684 | jmp l_0 |
||
685 | m_exit: |
||
686 | xor eax, eax |
||
687 | pop edi |
||
688 | pop esi |
||
689 | pop ebx |
||
690 | ret |
||
691 | endp |
||
692 | |||
693 | align 4 |
||
694 | proc user_alloc_at stdcall, address:dword, alloc_size:dword |
||
695 | |||
696 | push ebx |
||
697 | push esi |
||
698 | push edi |
||
699 | |||
700 | mov ebx, [current_slot] |
||
701 | mov edx, [address] |
||
702 | and edx, not 0xFFF |
||
703 | mov [address], edx |
||
704 | sub edx, 0x1000 |
||
705 | jb .error |
||
706 | mov esi, [ebx+APPDATA.heap_base] |
||
707 | mov edi, [ebx+APPDATA.heap_top] |
||
708 | cmp edx, esi |
||
709 | jb .error |
||
710 | .scan: |
||
711 | cmp esi, edi |
||
712 | jae .error |
||
713 | mov ebx, esi |
||
714 | shr ebx, 12 |
||
715 | mov eax, [page_tabs+ebx*4] |
||
716 | mov ecx, eax |
||
717 | and ecx, 0xFFFFF000 |
||
718 | add ecx, esi |
||
719 | cmp edx, ecx |
||
720 | jb .found |
||
721 | mov esi, ecx |
||
722 | jmp .scan |
||
723 | .error: |
||
724 | xor eax, eax |
||
725 | pop edi |
||
726 | pop esi |
||
727 | pop ebx |
||
728 | ret |
||
729 | .found: |
||
730 | test al, FREE_BLOCK |
||
731 | jz .error |
||
732 | mov eax, ecx |
||
733 | sub eax, edx |
||
734 | sub eax, 0x1000 |
||
735 | cmp eax, [alloc_size] |
||
736 | jb .error |
||
737 | |||
738 | ; Here we have 1 big free block which includes requested area. |
||
739 | ; In general, 3 other blocks must be created instead: |
||
740 | ; free at [esi, edx); |
||
741 | ; busy at [edx, edx+0x1000+ALIGN_UP(alloc_size,0x1000)); |
||
742 | ; free at [edx+0x1000+ALIGN_UP(alloc_size,0x1000), ecx) |
||
743 | ; First or third block (or both) may be absent. |
||
744 | mov eax, edx |
||
745 | sub eax, esi |
||
746 | jz .nofirst |
||
747 | or al, FREE_BLOCK |
||
748 | mov [page_tabs+ebx*4], eax |
||
749 | .nofirst: |
||
750 | mov eax, [alloc_size] |
||
751 | add eax, 0x1FFF |
||
752 | and eax, not 0xFFF |
||
753 | mov ebx, edx |
||
754 | add edx, eax |
||
755 | shr ebx, 12 |
||
756 | or al, USED_BLOCK |
||
757 | mov [page_tabs+ebx*4], eax |
||
758 | shr eax, 12 |
||
759 | dec eax |
||
760 | jz .second_nofill |
||
761 | inc ebx |
||
762 | .fill: |
||
763 | mov dword [page_tabs+ebx*4], 2 |
||
764 | inc ebx |
||
765 | dec eax |
||
766 | jnz .fill |
||
767 | .second_nofill: |
||
768 | sub ecx, edx |
||
769 | jz .nothird |
||
770 | or cl, FREE_BLOCK |
||
771 | mov [page_tabs+ebx*4], ecx |
||
772 | .nothird: |
||
773 | |||
774 | mov edx, [current_slot] |
||
775 | mov ebx, [alloc_size] |
||
776 | add ebx, 0xFFF |
||
777 | and ebx, not 0xFFF |
||
778 | add ebx, [edx+APPDATA.mem_size] |
||
779 | call update_mem_size |
||
780 | |||
781 | mov eax, [address] |
||
782 | |||
783 | pop edi |
||
784 | pop esi |
||
785 | pop ebx |
||
786 | ret |
||
787 | endp |
||
788 | |||
789 | align 4 |
||
790 | proc user_free stdcall, base:dword |
||
791 | |||
792 | push esi |
||
793 | |||
794 | mov esi, [base] |
||
795 | test esi, esi |
||
796 | jz .exit |
||
797 | |||
798 | push ebx |
||
799 | |||
800 | xor ebx, ebx |
||
801 | shr esi, 12 |
||
802 | mov eax, [page_tabs+(esi-1)*4] |
||
803 | test al, USED_BLOCK |
||
804 | jz .cantfree |
||
805 | test al, DONT_FREE_BLOCK |
||
806 | jnz .cantfree |
||
807 | |||
808 | and eax, not 4095 |
||
809 | mov ecx, eax |
||
810 | or al, FREE_BLOCK |
||
811 | mov [page_tabs+(esi-1)*4], eax |
||
812 | sub ecx, 4096 |
||
813 | mov ebx, ecx |
||
814 | shr ecx, 12 |
||
815 | jz .released |
||
816 | .release: |
||
817 | xor eax, eax |
||
818 | xchg eax, [page_tabs+esi*4] |
||
819 | test al, 1 |
||
820 | jz @F |
||
821 | test eax, PG_SHARED |
||
822 | jnz @F |
||
823 | call free_page |
||
824 | mov eax, esi |
||
825 | shl eax, 12 |
||
826 | invlpg [eax] |
||
827 | @@: |
||
828 | inc esi |
||
829 | dec ecx |
||
830 | jnz .release |
||
831 | .released: |
||
832 | push edi |
||
833 | |||
834 | mov edx, [current_slot] |
||
835 | mov esi, dword [edx+APPDATA.heap_base] |
||
836 | mov edi, dword [edx+APPDATA.heap_top] |
||
837 | sub ebx, [edx+APPDATA.mem_size] |
||
838 | neg ebx |
||
839 | call update_mem_size |
||
840 | call user_normalize |
||
841 | pop edi |
||
842 | pop ebx |
||
843 | pop esi |
||
844 | ret |
||
845 | .exit: |
||
846 | xor eax, eax |
||
847 | inc eax |
||
848 | pop esi |
||
849 | ret |
||
850 | .cantfree: |
||
851 | xor eax, eax |
||
852 | pop ebx |
||
853 | pop esi |
||
854 | ret |
||
855 | endp |
||
856 | |||
857 | user_normalize: |
||
858 | ; in: esi=heap_base, edi=heap_top |
||
859 | ; out: eax=0 <=> OK |
||
860 | ; destroys: ebx,edx,esi,edi |
||
861 | shr esi, 12 |
||
862 | shr edi, 12 |
||
863 | @@: |
||
864 | mov eax, [page_tabs+esi*4] |
||
865 | test al, USED_BLOCK |
||
866 | jz .test_free |
||
867 | shr eax, 12 |
||
868 | add esi, eax |
||
869 | jmp @B |
||
870 | .test_free: |
||
871 | test al, FREE_BLOCK |
||
872 | jz .err |
||
873 | mov edx, eax |
||
874 | shr edx, 12 |
||
875 | add edx, esi |
||
876 | cmp edx, edi |
||
877 | jae .exit |
||
878 | |||
879 | mov ebx, [page_tabs+edx*4] |
||
880 | test bl, USED_BLOCK |
||
881 | jz .next_free |
||
882 | |||
883 | shr ebx, 12 |
||
884 | add edx, ebx |
||
885 | mov esi, edx |
||
886 | jmp @B |
||
887 | .next_free: |
||
888 | test bl, FREE_BLOCK |
||
889 | jz .err |
||
890 | and dword [page_tabs+edx*4], 0 |
||
891 | add eax, ebx |
||
892 | and eax, not 4095 |
||
893 | or eax, FREE_BLOCK |
||
894 | mov [page_tabs+esi*4], eax |
||
895 | jmp @B |
||
896 | .exit: |
||
897 | xor eax, eax |
||
898 | inc eax |
||
899 | ret |
||
900 | .err: |
||
901 | xor eax, eax |
||
902 | ret |
||
903 | |||
904 | user_realloc: |
||
905 | ; in: eax = pointer, ebx = new size |
||
906 | ; out: eax = new pointer or NULL |
||
907 | test eax, eax |
||
908 | jnz @f |
||
909 | ; realloc(NULL,sz) - same as malloc(sz) |
||
910 | push ebx |
||
911 | call user_alloc |
||
912 | ret |
||
913 | @@: |
||
914 | push ecx edx |
||
915 | lea ecx, [eax - 0x1000] |
||
916 | shr ecx, 12 |
||
917 | mov edx, [page_tabs+ecx*4] |
||
918 | test dl, USED_BLOCK |
||
919 | jnz @f |
||
920 | ; attempt to realloc invalid pointer |
||
921 | .ret0: |
||
922 | pop edx ecx |
||
923 | xor eax, eax |
||
924 | ret |
||
925 | @@: |
||
926 | test dl, DONT_FREE_BLOCK |
||
927 | jnz .ret0 |
||
928 | add ebx, 0x1FFF |
||
929 | shr edx, 12 |
||
930 | shr ebx, 12 |
||
931 | ; edx = allocated size, ebx = new size |
||
932 | add edx, ecx |
||
933 | add ebx, ecx |
||
934 | cmp edx, ebx |
||
935 | jb .realloc_add |
||
936 | ; release part of allocated memory |
||
937 | .loop: |
||
938 | cmp edx, ebx |
||
939 | jz .release_done |
||
940 | dec edx |
||
941 | xor eax, eax |
||
942 | xchg eax, [page_tabs+edx*4] |
||
943 | test al, 1 |
||
944 | jz .loop |
||
945 | call free_page |
||
946 | mov eax, edx |
||
947 | shl eax, 12 |
||
948 | invlpg [eax] |
||
949 | jmp .loop |
||
950 | .release_done: |
||
951 | sub ebx, ecx |
||
952 | cmp ebx, 1 |
||
953 | jnz .nofreeall |
||
954 | mov eax, [page_tabs+ecx*4] |
||
955 | and eax, not 0xFFF |
||
956 | mov edx, [current_slot] |
||
957 | mov ebx, [APPDATA.mem_size+edx] |
||
958 | sub ebx, eax |
||
959 | add ebx, 0x1000 |
||
960 | or al, FREE_BLOCK |
||
961 | mov [page_tabs+ecx*4], eax |
||
962 | push esi edi |
||
963 | mov esi, [APPDATA.heap_base+edx] |
||
964 | mov edi, [APPDATA.heap_top+edx] |
||
965 | call update_mem_size |
||
966 | call user_normalize |
||
967 | pop edi esi |
||
968 | jmp .ret0 ; all freed |
||
969 | .nofreeall: |
||
970 | sub edx, ecx |
||
971 | shl ebx, 12 |
||
972 | or ebx, USED_BLOCK |
||
973 | xchg [page_tabs+ecx*4], ebx |
||
974 | shr ebx, 12 |
||
975 | sub ebx, edx |
||
976 | push ebx ecx edx |
||
977 | mov edx, [current_slot] |
||
978 | shl ebx, 12 |
||
979 | sub ebx, [APPDATA.mem_size+edx] |
||
980 | neg ebx |
||
981 | call update_mem_size |
||
982 | pop edx ecx ebx |
||
983 | lea eax, [ecx+1] |
||
984 | shl eax, 12 |
||
985 | push eax |
||
986 | add ecx, edx |
||
987 | lea edx, [ecx+ebx] |
||
988 | shl ebx, 12 |
||
989 | jz .ret |
||
990 | push esi |
||
991 | mov esi, [current_slot] |
||
992 | mov esi, [APPDATA.heap_top+esi] |
||
993 | shr esi, 12 |
||
994 | @@: |
||
995 | cmp edx, esi |
||
996 | jae .merge_done |
||
997 | mov eax, [page_tabs+edx*4] |
||
998 | test al, USED_BLOCK |
||
999 | jnz .merge_done |
||
1000 | and dword [page_tabs+edx*4], 0 |
||
1001 | shr eax, 12 |
||
1002 | add edx, eax |
||
1003 | shl eax, 12 |
||
1004 | add ebx, eax |
||
1005 | jmp @b |
||
1006 | .merge_done: |
||
1007 | pop esi |
||
1008 | or ebx, FREE_BLOCK |
||
1009 | mov [page_tabs+ecx*4], ebx |
||
1010 | .ret: |
||
1011 | pop eax edx ecx |
||
1012 | ret |
||
1013 | .realloc_add: |
||
1014 | ; get some additional memory |
||
1015 | mov eax, [current_slot] |
||
1016 | mov eax, [APPDATA.heap_top+eax] |
||
1017 | shr eax, 12 |
||
1018 | cmp edx, eax |
||
1019 | jae .cant_inplace |
||
1020 | mov eax, [page_tabs+edx*4] |
||
1021 | test al, FREE_BLOCK |
||
1022 | jz .cant_inplace |
||
1023 | shr eax, 12 |
||
1024 | add eax, edx |
||
1025 | sub eax, ebx |
||
1026 | jb .cant_inplace |
||
1027 | jz @f |
||
1028 | shl eax, 12 |
||
1029 | or al, FREE_BLOCK |
||
1030 | mov [page_tabs+ebx*4], eax |
||
1031 | @@: |
||
1032 | mov eax, ebx |
||
1033 | sub eax, ecx |
||
1034 | shl eax, 12 |
||
1035 | or al, USED_BLOCK |
||
1036 | mov [page_tabs+ecx*4], eax |
||
1037 | lea eax, [ecx+1] |
||
1038 | shl eax, 12 |
||
1039 | push eax |
||
1040 | push edi |
||
1041 | lea edi, [page_tabs+edx*4] |
||
1042 | mov eax, 2 |
||
1043 | sub ebx, edx |
||
1044 | mov ecx, ebx |
||
1045 | cld |
||
1046 | rep stosd |
||
1047 | pop edi |
||
1048 | mov edx, [current_slot] |
||
1049 | shl ebx, 12 |
||
1050 | add ebx, [APPDATA.mem_size+edx] |
||
1051 | call update_mem_size |
||
1052 | pop eax edx ecx |
||
1053 | ret |
||
1054 | .cant_inplace: |
||
1055 | push esi edi |
||
1056 | mov eax, [current_slot] |
||
1057 | mov esi, [APPDATA.heap_base+eax] |
||
1058 | mov edi, [APPDATA.heap_top+eax] |
||
1059 | shr esi, 12 |
||
1060 | shr edi, 12 |
||
1061 | sub ebx, ecx |
||
1062 | .find_place: |
||
1063 | cmp esi, edi |
||
1064 | jae .place_not_found |
||
1065 | mov eax, [page_tabs+esi*4] |
||
1066 | test al, FREE_BLOCK |
||
1067 | jz .next_place |
||
1068 | shr eax, 12 |
||
1069 | cmp eax, ebx |
||
1070 | jae .place_found |
||
1071 | add esi, eax |
||
1072 | jmp .find_place |
||
1073 | .next_place: |
||
1074 | shr eax, 12 |
||
1075 | add esi, eax |
||
1076 | jmp .find_place |
||
1077 | .place_not_found: |
||
1078 | pop edi esi |
||
1079 | jmp .ret0 |
||
1080 | .place_found: |
||
1081 | sub eax, ebx |
||
1082 | jz @f |
||
1083 | push esi |
||
1084 | add esi, ebx |
||
1085 | shl eax, 12 |
||
1086 | or al, FREE_BLOCK |
||
1087 | mov [page_tabs+esi*4], eax |
||
1088 | pop esi |
||
1089 | @@: |
||
1090 | mov eax, ebx |
||
1091 | shl eax, 12 |
||
1092 | or al, USED_BLOCK |
||
1093 | mov [page_tabs+esi*4], eax |
||
1094 | inc esi |
||
1095 | mov eax, esi |
||
1096 | shl eax, 12 |
||
1097 | push eax |
||
1098 | mov eax, [page_tabs+ecx*4] |
||
1099 | and eax, not 0xFFF |
||
1100 | or al, FREE_BLOCK |
||
1101 | sub edx, ecx |
||
1102 | mov [page_tabs+ecx*4], eax |
||
1103 | inc ecx |
||
1104 | dec ebx |
||
1105 | dec edx |
||
1106 | jz .no |
||
1107 | @@: |
||
1108 | xor eax, eax |
||
1109 | xchg eax, [page_tabs+ecx*4] |
||
1110 | mov [page_tabs+esi*4], eax |
||
1111 | mov eax, ecx |
||
1112 | shl eax, 12 |
||
1113 | invlpg [eax] |
||
1114 | inc esi |
||
1115 | inc ecx |
||
1116 | dec ebx |
||
1117 | dec edx |
||
1118 | jnz @b |
||
1119 | .no: |
||
1120 | push ebx |
||
1121 | mov edx, [current_slot] |
||
1122 | shl ebx, 12 |
||
1123 | add ebx, [APPDATA.mem_size+edx] |
||
1124 | call update_mem_size |
||
1125 | pop ebx |
||
1126 | @@: |
||
1127 | mov dword [page_tabs+esi*4], 2 |
||
1128 | inc esi |
||
1129 | dec ebx |
||
1130 | jnz @b |
||
1131 | pop eax edi esi edx ecx |
||
1132 | ret |
||
1133 | |||
1134 | if 0 |
||
1135 | align 4 |
||
1136 | proc alloc_dll |
||
1137 | pushf |
||
1138 | cli |
||
1139 | bsf eax, [dll_map] |
||
1140 | jnz .find |
||
1141 | popf |
||
1142 | xor eax, eax |
||
1143 | ret |
||
1144 | .find: |
||
1145 | btr [dll_map], eax |
||
1146 | popf |
||
1147 | shl eax, 5 |
||
1148 | add eax, dll_tab |
||
1149 | ret |
||
1150 | endp |
||
1151 | |||
1152 | align 4 |
||
1153 | proc alloc_service |
||
1154 | pushf |
||
1155 | cli |
||
1156 | bsf eax, [srv_map] |
||
1157 | jnz .find |
||
1158 | popf |
||
1159 | xor eax, eax |
||
1160 | ret |
||
1161 | .find: |
||
1162 | btr [srv_map], eax |
||
1163 | popf |
||
1164 | shl eax, 0x02 |
||
1165 | lea eax, [srv_tab+eax+eax*8] ;srv_tab+eax*36 |
||
1166 | ret |
||
1167 | endp |
||
1168 | |||
1169 | end if |
||
1170 | |||
1171 | |||
1172 | ;;;;;;;;;;;;;; SHARED ;;;;;;;;;;;;;;;;; |
||
1173 | |||
1174 | |||
1175 | ; param |
||
1176 | ; eax= shm_map object |
||
1177 | |||
1178 | align 4 |
||
1179 | destroy_smap: |
||
1180 | |||
1181 | pushfd |
||
1182 | cli |
||
1183 | |||
1184 | push esi |
||
1185 | push edi |
||
1186 | |||
1187 | mov edi, eax |
||
1188 | mov esi, [eax+SMAP.parent] |
||
1189 | test esi, esi |
||
1190 | jz .done |
||
1191 | |||
1192 | lock dec [esi+SMEM.refcount] |
||
1193 | jnz .done |
||
1194 | |||
1195 | mov ecx, [esi+SMEM.bk] |
||
1196 | mov edx, [esi+SMEM.fd] |
||
1197 | |||
1198 | mov [ecx+SMEM.fd], edx |
||
1199 | mov [edx+SMEM.bk], ecx |
||
1200 | |||
1201 | stdcall kernel_free, [esi+SMEM.base] |
||
1202 | mov eax, esi |
||
1203 | call free |
||
1204 | .done: |
||
1205 | mov eax, edi |
||
1206 | call destroy_kernel_object |
||
1207 | |||
1208 | pop edi |
||
1209 | pop esi |
||
1210 | popfd |
||
1211 | |||
1212 | ret |
||
1213 | |||
1214 | E_NOTFOUND equ 5 |
||
1215 | E_ACCESS equ 10 |
||
1216 | E_NOMEM equ 30 |
||
1217 | E_PARAM equ 33 |
||
1218 | |||
1219 | SHM_READ equ 0 |
||
1220 | SHM_WRITE equ 1 |
||
1221 | |||
1222 | SHM_ACCESS_MASK equ 3 |
||
1223 | |||
1224 | SHM_OPEN equ (0 shl 2) |
||
1225 | SHM_OPEN_ALWAYS equ (1 shl 2) |
||
1226 | SHM_CREATE equ (2 shl 2) |
||
1227 | |||
1228 | SHM_OPEN_MASK equ (3 shl 2) |
||
1229 | |||
1230 | align 4 |
||
1231 | proc shmem_open stdcall name:dword, size:dword, access:dword |
||
1232 | locals |
||
1233 | action dd ? |
||
1234 | owner_access dd ? |
||
1235 | mapped dd ? |
||
1236 | endl |
||
1237 | |||
1238 | push ebx |
||
1239 | push esi |
||
1240 | push edi |
||
1241 | |||
1242 | mov [mapped], 0 |
||
1243 | mov [owner_access], 0 |
||
1244 | |||
1245 | pushfd ;mutex required |
||
1246 | cli |
||
1247 | |||
1248 | mov eax, [access] |
||
1249 | and eax, SHM_OPEN_MASK |
||
1250 | mov [action], eax |
||
1251 | |||
1252 | mov ebx, [name] |
||
1253 | test ebx, ebx |
||
1254 | mov edx, E_PARAM |
||
1255 | jz .fail |
||
1256 | |||
1257 | mov esi, [shmem_list.fd] |
||
1258 | align 4 |
||
1259 | @@: |
||
1260 | cmp esi, shmem_list |
||
1261 | je .not_found |
||
1262 | |||
1263 | lea edx, [esi+SMEM.name]; link , base, size |
||
1264 | stdcall strncmp, edx, ebx, 32 |
||
1265 | test eax, eax |
||
1266 | je .found |
||
1267 | |||
1268 | mov esi, [esi+SMEM.fd] |
||
1269 | jmp @B |
||
1270 | |||
1271 | .not_found: |
||
1272 | mov eax, [action] |
||
1273 | |||
1274 | cmp eax, SHM_OPEN |
||
1275 | mov edx, E_NOTFOUND |
||
1276 | je .fail |
||
1277 | |||
1278 | cmp eax, SHM_CREATE |
||
1279 | mov edx, E_PARAM |
||
1280 | je .create_shm |
||
1281 | |||
1282 | cmp eax, SHM_OPEN_ALWAYS |
||
1283 | jne .fail |
||
1284 | |||
1285 | .create_shm: |
||
1286 | |||
1287 | mov ecx, [size] |
||
1288 | test ecx, ecx |
||
1289 | jz .fail |
||
1290 | |||
1291 | add ecx, 4095 |
||
1292 | and ecx, -4096 |
||
1293 | mov [size], ecx |
||
1294 | |||
1295 | mov eax, SMEM.sizeof |
||
1296 | call malloc |
||
1297 | test eax, eax |
||
1298 | mov esi, eax |
||
1299 | mov edx, E_NOMEM |
||
1300 | jz .fail |
||
1301 | |||
1302 | stdcall kernel_alloc, [size] |
||
1303 | test eax, eax |
||
1304 | mov [mapped], eax |
||
1305 | mov edx, E_NOMEM |
||
1306 | jz .cleanup |
||
1307 | |||
1308 | mov ecx, [size] |
||
1309 | mov edx, [access] |
||
1310 | and edx, SHM_ACCESS_MASK |
||
1311 | |||
1312 | mov [esi+SMEM.base], eax |
||
1313 | mov [esi+SMEM.size], ecx |
||
1314 | mov [esi+SMEM.access], edx |
||
1315 | mov [esi+SMEM.refcount], 0 |
||
1316 | mov [esi+SMEM.name+28], 0 |
||
1317 | |||
1318 | lea eax, [esi+SMEM.name] |
||
1319 | stdcall strncpy, eax, [name], 31 |
||
1320 | |||
1321 | mov eax, [shmem_list.fd] |
||
1322 | mov [esi+SMEM.bk], shmem_list |
||
1323 | mov [esi+SMEM.fd], eax |
||
1324 | |||
1325 | mov [eax+SMEM.bk], esi |
||
1326 | mov [shmem_list.fd], esi |
||
1327 | |||
1328 | mov [action], SHM_OPEN |
||
1329 | mov [owner_access], SHM_WRITE |
||
1330 | |||
1331 | .found: |
||
1332 | mov eax, [action] |
||
1333 | |||
1334 | cmp eax, SHM_CREATE |
||
1335 | mov edx, E_ACCESS |
||
1336 | je .exit |
||
1337 | |||
1338 | cmp eax, SHM_OPEN |
||
1339 | mov edx, E_PARAM |
||
1340 | je .create_map |
||
1341 | |||
1342 | cmp eax, SHM_OPEN_ALWAYS |
||
1343 | jne .fail |
||
1344 | |||
1345 | .create_map: |
||
1346 | |||
1347 | mov eax, [access] |
||
1348 | and eax, SHM_ACCESS_MASK |
||
1349 | cmp eax, [esi+SMEM.access] |
||
1350 | mov [access], eax |
||
1351 | mov edx, E_ACCESS |
||
1352 | ja .fail |
||
1353 | |||
1354 | mov ebx, [CURRENT_TASK] |
||
1355 | shl ebx, 5 |
||
1356 | mov ebx, [CURRENT_TASK+ebx+4] |
||
1357 | mov eax, SMAP.sizeof |
||
1358 | |||
1359 | call create_kernel_object |
||
1360 | test eax, eax |
||
1361 | mov edi, eax |
||
1362 | mov edx, E_NOMEM |
||
1363 | jz .fail |
||
1364 | |||
1365 | inc [esi+SMEM.refcount] |
||
1366 | |||
1367 | mov [edi+SMAP.magic], 'SMAP' |
||
1368 | mov [edi+SMAP.destroy], destroy_smap |
||
1369 | mov [edi+SMAP.parent], esi |
||
1370 | mov [edi+SMAP.base], 0 |
||
1371 | |||
1372 | stdcall user_alloc, [esi+SMEM.size] |
||
1373 | test eax, eax |
||
1374 | mov [mapped], eax |
||
1375 | mov edx, E_NOMEM |
||
1376 | jz .cleanup2 |
||
1377 | |||
1378 | mov [edi+SMAP.base], eax |
||
1379 | |||
1380 | mov ecx, [esi+SMEM.size] |
||
1381 | mov [size], ecx |
||
1382 | |||
1383 | shr ecx, 12 |
||
1384 | shr eax, 10 |
||
1385 | |||
1386 | mov esi, [esi+SMEM.base] |
||
1387 | shr esi, 10 |
||
1388 | lea edi, [page_tabs+eax] |
||
1389 | add esi, page_tabs |
||
1390 | |||
1391 | mov edx, [access] |
||
1392 | or edx, [owner_access] |
||
1393 | shl edx, 1 |
||
1394 | or edx, PG_USER+PG_SHARED |
||
1395 | @@: |
||
1396 | lodsd |
||
1397 | and eax, 0xFFFFF000 |
||
1398 | or eax, edx |
||
1399 | stosd |
||
1400 | loop @B |
||
1401 | |||
1402 | xor edx, edx |
||
1403 | |||
1404 | cmp [owner_access], 0 |
||
1405 | jne .fail |
||
1406 | .exit: |
||
1407 | mov edx, [size] |
||
1408 | .fail: |
||
1409 | mov eax, [mapped] |
||
1410 | |||
1411 | popfd |
||
1412 | pop edi |
||
1413 | pop esi |
||
1414 | pop ebx |
||
1415 | ret |
||
1416 | .cleanup: |
||
1417 | mov [size], edx |
||
1418 | mov eax, esi |
||
1419 | call free |
||
1420 | jmp .exit |
||
1421 | |||
1422 | .cleanup2: |
||
1423 | mov [size], edx |
||
1424 | mov eax, edi |
||
1425 | call destroy_smap |
||
1426 | jmp .exit |
||
1427 | endp |
||
1428 | |||
1429 | align 4 |
||
1430 | proc shmem_close stdcall, name:dword |
||
1431 | |||
1432 | mov eax, [name] |
||
1433 | test eax, eax |
||
1434 | jz .fail |
||
1435 | |||
1436 | push esi |
||
1437 | push edi |
||
1438 | pushfd |
||
1439 | cli |
||
1440 | |||
1441 | mov esi, [current_slot] |
||
1442 | add esi, APP_OBJ_OFFSET |
||
1443 | .next: |
||
1444 | mov eax, [esi+APPOBJ.fd] |
||
1445 | test eax, eax |
||
1446 | jz @F |
||
1447 | |||
1448 | cmp eax, esi |
||
1449 | mov esi, eax |
||
1450 | je @F |
||
1451 | |||
1452 | cmp [eax+SMAP.magic], 'SMAP' |
||
1453 | jne .next |
||
1454 | |||
1455 | mov edi, [eax+SMAP.parent] |
||
1456 | test edi, edi |
||
1457 | jz .next |
||
1458 | |||
1459 | lea edi, [edi+SMEM.name] |
||
1460 | stdcall strncmp, [name], edi, 32 |
||
1461 | test eax, eax |
||
1462 | jne .next |
||
1463 | |||
1464 | stdcall user_free, [esi+SMAP.base] |
||
1465 | |||
1466 | mov eax, esi |
||
1467 | call [esi+APPOBJ.destroy] |
||
1468 | @@: |
||
1469 | popfd |
||
1470 | pop edi |
||
1471 | pop esi |
||
1472 | .fail: |
||
1473 | ret |
||
1474 | endp=> |