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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: 2412 $ |
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9 | |||
10 | |||
2384 | hidnplayr | 11 | struct MEM_BLOCK |
12 | list LHEAD |
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13 | next_block dd ? ;+8 |
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14 | prev_block dd ? ;+4 |
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15 | base dd ? ;+16 |
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16 | size dd ? ;+20 |
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17 | flags dd ? ;+24 |
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18 | handle dd ? ;+28 |
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19 | ends |
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2288 | clevermous | 20 | |
21 | FREE_BLOCK equ 4 |
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22 | USED_BLOCK equ 8 |
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23 | DONT_FREE_BLOCK equ 10h |
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24 | |||
25 | |||
26 | block_next equ MEM_BLOCK.next_block |
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27 | block_prev equ MEM_BLOCK.prev_block |
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28 | list_fd equ MEM_BLOCK.list.next |
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29 | list_bk equ MEM_BLOCK.list.prev |
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30 | block_base equ MEM_BLOCK.base |
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31 | block_size equ MEM_BLOCK.size |
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32 | block_flags equ MEM_BLOCK.flags |
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33 | |||
34 | macro calc_index op |
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35 | { shr op, 12 |
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36 | dec op |
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37 | cmp op, 63 |
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38 | jna @f |
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39 | mov op, 63 |
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40 | @@: |
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41 | } |
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42 | |||
43 | align 4 |
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44 | md: |
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45 | .add_to_used: |
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46 | mov eax, [esi+block_base] |
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47 | mov ebx, [esi+block_base] |
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48 | shr ebx, 6 |
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49 | add eax, ebx |
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50 | shr ebx, 6 |
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51 | add eax, ebx |
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52 | shr eax, 12 |
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53 | and eax, 63 |
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54 | inc [mem_hash_cnt+eax*4] |
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55 | |||
56 | lea ecx, [mem_used_list+eax*8] |
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57 | list_add esi, ecx |
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58 | mov [esi+block_flags], USED_BLOCK |
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59 | mov eax, [esi+block_size] |
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60 | sub [heap_free], eax |
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61 | ret |
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62 | align 4 |
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63 | .find_used: |
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64 | mov ecx, eax |
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65 | mov ebx, eax |
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66 | shr ebx, 6 |
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67 | add ecx, ebx |
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68 | shr ebx, 6 |
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69 | add ecx, ebx |
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70 | shr ecx, 12 |
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71 | and ecx, 63 |
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72 | |||
73 | lea ebx, [mem_used_list+ecx*8] |
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74 | mov esi, ebx |
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75 | .next: |
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76 | mov esi, [esi+list_fd] |
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77 | cmp esi, ebx |
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78 | je .fail |
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79 | |||
80 | cmp eax, [esi+block_base] |
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81 | jne .next |
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82 | |||
83 | ret |
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84 | .fail: |
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85 | xor esi, esi |
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86 | ret |
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87 | |||
88 | align 4 |
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89 | .del_from_used: |
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90 | call .find_used |
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91 | test esi, esi |
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92 | jz .done |
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93 | |||
94 | cmp [esi+block_flags], USED_BLOCK |
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95 | jne .fatal |
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96 | |||
97 | dec [mem_hash_cnt+ecx*4] |
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98 | list_del esi |
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99 | .done: |
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100 | ret |
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101 | .fatal: ;FIXME panic here |
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102 | xor esi, esi |
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103 | ret |
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104 | |||
105 | ;Initial heap state |
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106 | ; |
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107 | ;+heap_size terminator USED_BLOCK |
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108 | ;+4096*MEM_BLOCK.sizeof free space FREE_BLOCK |
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109 | ;HEAP_BASE heap_descriptors USED_BLOCK |
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110 | ; |
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111 | |||
112 | align 4 |
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113 | proc init_kernel_heap |
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114 | |||
115 | mov ecx, 64 |
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116 | mov edi, mem_block_list |
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117 | @@: |
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118 | mov eax, edi |
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119 | stosd |
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120 | stosd |
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121 | loop @B |
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122 | |||
123 | mov ecx, 64 |
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124 | mov edi, mem_used_list |
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125 | @@: |
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126 | mov eax, edi |
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127 | stosd |
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128 | stosd |
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129 | loop @B |
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130 | |||
131 | stdcall alloc_pages, dword 32 |
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132 | mov ecx, 32 |
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133 | mov edx, eax |
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134 | mov edi, HEAP_BASE |
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135 | .l1: |
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136 | stdcall map_page, edi, edx, PG_SW |
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137 | add edi, 0x1000 |
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138 | add edx, 0x1000 |
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139 | dec ecx |
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140 | jnz .l1 |
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141 | |||
142 | mov edi, HEAP_BASE ;descriptors |
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2384 | hidnplayr | 143 | mov ebx, HEAP_BASE+sizeof.MEM_BLOCK ;free space |
144 | mov ecx, HEAP_BASE+sizeof.MEM_BLOCK*2 ;terminator |
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2288 | clevermous | 145 | |
146 | xor eax, eax |
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147 | mov [edi+block_next], ebx |
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148 | mov [edi+block_prev], eax |
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149 | mov [edi+list_fd], eax |
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150 | mov [edi+list_bk], eax |
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151 | mov [edi+block_base], HEAP_BASE |
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2384 | hidnplayr | 152 | mov [edi+block_size], 4096*sizeof.MEM_BLOCK |
2288 | clevermous | 153 | mov [edi+block_flags], USED_BLOCK |
154 | |||
155 | mov [ecx+block_next], eax |
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156 | mov [ecx+block_prev], ebx |
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157 | mov [edi+list_fd], eax |
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158 | mov [edi+list_bk], eax |
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159 | mov [edi+block_base], eax |
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160 | mov [edi+block_size], eax |
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161 | mov [edi+block_flags], USED_BLOCK |
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162 | |||
163 | mov [ebx+block_next], ecx |
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164 | mov [ebx+block_prev], edi |
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2384 | hidnplayr | 165 | mov [ebx+block_base], HEAP_BASE+4096*sizeof.MEM_BLOCK |
2288 | clevermous | 166 | |
167 | mov ecx, [pg_data.kernel_pages] |
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168 | shl ecx, 12 |
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2384 | hidnplayr | 169 | sub ecx, HEAP_BASE-OS_BASE+4096*sizeof.MEM_BLOCK |
2288 | clevermous | 170 | mov [heap_size], ecx |
171 | mov [heap_free], ecx |
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172 | mov [ebx+block_size], ecx |
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173 | mov [ebx+block_flags], FREE_BLOCK |
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174 | |||
175 | mov [mem_block_mask], eax |
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176 | mov [mem_block_mask+4], 0x80000000 |
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177 | |||
178 | mov ecx, mem_block_list+63*8 |
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179 | list_add ebx, ecx |
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180 | |||
181 | mov ecx, 4096-3-1 |
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2384 | hidnplayr | 182 | mov eax, HEAP_BASE+sizeof.MEM_BLOCK*4 |
2288 | clevermous | 183 | |
2384 | hidnplayr | 184 | mov [next_memblock], HEAP_BASE+sizeof.MEM_BLOCK *3 |
2288 | clevermous | 185 | @@: |
2384 | hidnplayr | 186 | mov [eax-sizeof.MEM_BLOCK], eax |
187 | add eax, sizeof.MEM_BLOCK |
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2288 | clevermous | 188 | loop @B |
189 | |||
2384 | hidnplayr | 190 | mov [eax-sizeof.MEM_BLOCK], dword 0 |
2288 | clevermous | 191 | |
192 | mov ecx, heap_mutex |
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193 | call mutex_init |
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194 | mov [heap_blocks], 4094 |
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195 | mov [free_blocks], 4093 |
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196 | ret |
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197 | endp |
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198 | |||
199 | ; param |
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200 | ; eax= required size |
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201 | ; |
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202 | ; retval |
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203 | ; edi= memory block descriptor |
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204 | ; ebx= descriptor index |
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205 | |||
206 | align 4 |
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207 | get_small_block: |
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208 | mov ecx, eax |
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209 | shr ecx, 12 |
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210 | dec ecx |
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211 | cmp ecx, 63 |
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212 | jle .get_index |
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213 | mov ecx, 63 |
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214 | .get_index: |
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215 | lea esi, [mem_block_mask] |
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216 | xor ebx, ebx |
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217 | or edx, -1 |
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218 | |||
219 | cmp ecx, 32 |
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220 | jb .bit_test |
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221 | |||
222 | sub ecx, 32 |
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223 | add ebx, 32 |
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224 | add esi, 4 |
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225 | .bit_test: |
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226 | shl edx, cl |
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227 | and edx, [esi] |
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228 | .find: |
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229 | bsf edi, edx |
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230 | jz .high_mask |
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231 | add ebx, edi |
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232 | lea ecx, [mem_block_list+ebx*8] |
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233 | mov edi, ecx |
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234 | .next: |
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235 | mov edi, [edi+list_fd] |
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236 | cmp edi, ecx |
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237 | je .err |
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238 | cmp eax, [edi+block_size] |
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239 | ja .next |
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240 | ret |
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241 | .err: |
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242 | xor edi, edi |
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243 | ret |
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244 | |||
245 | .high_mask: |
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246 | add esi, 4 |
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247 | cmp esi, mem_block_mask+8 |
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248 | jae .err |
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249 | add ebx, 32 |
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250 | mov edx, [esi] |
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251 | jmp .find |
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252 | |||
253 | |||
254 | align 4 |
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255 | free_mem_block: |
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256 | mov ebx, [next_memblock] |
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257 | mov [eax], ebx |
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258 | mov [next_memblock], eax |
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259 | xor ebx, ebx |
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260 | |||
261 | mov dword [eax+4], ebx |
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262 | mov dword [eax+8], ebx |
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263 | mov dword [eax+12], ebx |
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264 | mov dword [eax+16], ebx |
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265 | ; mov dword [eax+20], 0 ;don't clear block size |
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266 | mov dword [eax+24], ebx |
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267 | mov dword [eax+28], ebx |
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268 | inc [free_blocks] |
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269 | ret |
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270 | |||
271 | align 4 |
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272 | proc alloc_kernel_space stdcall, size:dword |
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273 | local block_ind:DWORD |
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274 | |||
275 | push ebx |
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276 | push esi |
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277 | push edi |
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278 | |||
279 | mov eax, [size] |
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280 | add eax, 4095 |
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281 | and eax, not 4095 |
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282 | mov [size], eax |
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283 | |||
284 | cmp eax, [heap_free] |
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285 | ja .error |
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286 | |||
287 | mov ecx, heap_mutex |
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288 | call mutex_lock |
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289 | |||
290 | mov eax, [size] |
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291 | |||
292 | call get_small_block ; eax |
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293 | test edi, edi |
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294 | jz .error_unlock |
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295 | |||
296 | cmp [edi+block_flags], FREE_BLOCK |
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297 | jne .error_unlock |
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298 | |||
299 | mov [block_ind], ebx ;index of allocated block |
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300 | |||
301 | mov eax, [edi+block_size] |
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302 | cmp eax, [size] |
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303 | je .m_eq_size |
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304 | |||
305 | mov esi, [next_memblock] ;new memory block |
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306 | test esi, esi |
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307 | jz .error_unlock |
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308 | |||
309 | dec [free_blocks] |
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310 | mov eax, [esi] |
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311 | mov [next_memblock], eax |
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312 | |||
313 | mov [esi+block_next], edi |
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314 | mov eax, [edi+block_prev] |
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315 | mov [esi+block_prev], eax |
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316 | mov [edi+block_prev], esi |
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317 | mov [esi+list_fd], 0 |
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318 | mov [esi+list_bk], 0 |
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319 | mov [eax+block_next], esi |
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320 | |||
321 | mov ebx, [edi+block_base] |
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322 | mov [esi+block_base], ebx |
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323 | mov edx, [size] |
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324 | mov [esi+block_size], edx |
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325 | add [edi+block_base], edx |
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326 | sub [edi+block_size], edx |
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327 | |||
328 | mov eax, [edi+block_size] |
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329 | calc_index eax |
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330 | cmp eax, [block_ind] |
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331 | je .add_used |
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332 | |||
333 | list_del edi |
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334 | |||
335 | mov ecx, [block_ind] |
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336 | lea edx, [mem_block_list+ecx*8] |
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337 | cmp 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 | bts [mem_block_mask], eax |
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342 | lea edx, [mem_block_list+eax*8] ;edx= list head |
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343 | list_add edi, edx |
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344 | .add_used: |
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345 | |||
346 | call md.add_to_used |
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347 | |||
348 | mov ecx, heap_mutex |
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349 | call mutex_unlock |
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350 | mov eax, [esi+block_base] |
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351 | pop edi |
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352 | pop esi |
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353 | pop ebx |
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354 | ret |
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355 | |||
356 | .m_eq_size: |
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357 | list_del edi |
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358 | lea edx, [mem_block_list+ebx*8] |
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359 | cmp edx, [edx] |
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360 | jnz @f |
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361 | btr [mem_block_mask], ebx |
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362 | @@: |
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363 | mov esi, edi |
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364 | jmp .add_used |
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365 | |||
366 | .error_unlock: |
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367 | mov ecx, heap_mutex |
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368 | call mutex_unlock |
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369 | .error: |
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370 | xor eax, eax |
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371 | pop edi |
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372 | pop esi |
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373 | pop ebx |
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374 | ret |
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375 | endp |
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376 | |||
377 | align 4 |
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378 | proc free_kernel_space stdcall uses ebx ecx edx esi edi, base:dword |
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379 | |||
380 | mov ecx, heap_mutex |
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381 | call mutex_lock |
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382 | |||
383 | mov eax, [base] |
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384 | |||
385 | call md.del_from_used |
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386 | test esi, esi |
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387 | jz .fail |
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388 | |||
389 | mov eax, [esi+block_size] |
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390 | add [heap_free], eax |
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391 | |||
392 | mov edi, [esi+block_next] |
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393 | cmp [edi+block_flags], FREE_BLOCK |
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394 | jne .prev |
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395 | |||
396 | list_del edi |
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397 | |||
398 | mov edx, [edi+block_next] |
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399 | mov [esi+block_next], edx |
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400 | mov [edx+block_prev], esi |
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401 | mov ecx, [edi+block_size] |
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402 | add [esi+block_size], ecx |
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403 | |||
404 | calc_index ecx |
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405 | |||
406 | lea edx, [mem_block_list+ecx*8] |
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407 | cmp edx, [edx] |
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408 | jne @F |
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409 | btr [mem_block_mask], ecx |
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410 | @@: |
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411 | mov eax, edi |
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412 | call free_mem_block |
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413 | .prev: |
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414 | mov edi, [esi+block_prev] |
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415 | cmp [edi+block_flags], FREE_BLOCK |
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416 | jne .insert |
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417 | |||
418 | mov edx, [esi+block_next] |
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419 | mov [edi+block_next], edx |
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420 | mov [edx+block_prev], edi |
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421 | |||
422 | mov eax, esi |
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423 | call free_mem_block |
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424 | |||
425 | mov ecx, [edi+block_size] |
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426 | mov eax, [esi+block_size] |
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427 | add eax, ecx |
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428 | mov [edi+block_size], eax |
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429 | |||
430 | calc_index eax ;new index |
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431 | calc_index ecx ;old index |
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432 | cmp eax, ecx |
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433 | je .m_eq |
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434 | |||
435 | push ecx |
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436 | list_del edi |
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437 | pop ecx |
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438 | |||
439 | lea edx, [mem_block_list+ecx*8] |
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440 | cmp edx, [edx] |
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441 | jne .add_block |
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442 | btr [mem_block_mask], ecx |
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443 | .add_block: |
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444 | bts [mem_block_mask], eax |
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445 | lea edx, [mem_block_list+eax*8] |
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446 | list_add edi, edx |
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447 | .m_eq: |
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448 | mov ecx, heap_mutex |
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449 | call mutex_unlock |
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450 | xor eax, eax |
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451 | not eax |
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452 | ret |
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453 | .insert: |
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454 | mov [esi+block_flags], FREE_BLOCK |
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455 | mov eax, [esi+block_size] |
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456 | calc_index eax |
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457 | mov edi, esi |
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458 | jmp .add_block |
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459 | |||
460 | .fail: |
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461 | mov ecx, heap_mutex |
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462 | call mutex_unlock |
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463 | xor eax, eax |
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464 | ret |
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465 | endp |
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466 | |||
467 | align 4 |
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468 | proc kernel_alloc stdcall, size:dword |
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469 | locals |
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470 | lin_addr dd ? |
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471 | pages_count dd ? |
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472 | endl |
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473 | |||
474 | push ebx |
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475 | push edi |
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476 | |||
477 | mov eax, [size] |
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478 | add eax, 4095 |
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479 | and eax, not 4095; |
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480 | mov [size], eax |
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481 | and eax, eax |
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482 | jz .err |
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483 | mov ebx, eax |
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484 | shr ebx, 12 |
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485 | mov [pages_count], ebx |
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486 | |||
487 | stdcall alloc_kernel_space, eax |
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488 | test eax, eax |
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489 | jz .err |
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490 | mov [lin_addr], eax |
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491 | |||
492 | mov ecx, [pages_count] |
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493 | mov edx, eax |
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494 | mov ebx, ecx |
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495 | |||
496 | shr ecx, 3 |
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497 | jz .next |
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498 | |||
499 | and ebx, not 7 |
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500 | push ebx |
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501 | stdcall alloc_pages, ebx |
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502 | pop ecx ; yes ecx!!! |
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503 | and eax, eax |
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504 | jz .err |
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505 | |||
506 | mov edi, eax |
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507 | mov edx, [lin_addr] |
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508 | @@: |
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509 | stdcall map_page, edx, edi, dword PG_SW |
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510 | add edx, 0x1000 |
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511 | add edi, 0x1000 |
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512 | dec ecx |
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513 | jnz @B |
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514 | .next: |
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515 | mov ecx, [pages_count] |
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516 | and ecx, 7 |
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517 | jz .end |
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518 | @@: |
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519 | push ecx |
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520 | call alloc_page |
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521 | pop ecx |
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522 | test eax, eax |
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523 | jz .err |
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524 | |||
525 | stdcall map_page, edx, eax, dword PG_SW |
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526 | add edx, 0x1000 |
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527 | dec ecx |
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528 | jnz @B |
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529 | .end: |
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530 | mov eax, [lin_addr] |
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531 | pop edi |
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532 | pop ebx |
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533 | ret |
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534 | .err: |
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535 | xor eax, eax |
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536 | pop edi |
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537 | pop ebx |
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538 | ret |
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539 | endp |
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540 | |||
541 | align 4 |
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542 | proc kernel_free stdcall, base:dword |
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543 | |||
544 | push ebx esi |
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545 | |||
546 | mov ecx, heap_mutex |
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547 | call mutex_lock |
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548 | |||
549 | mov eax, [base] |
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550 | call md.find_used |
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551 | |||
552 | mov ecx, heap_mutex |
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553 | cmp [esi+block_flags], USED_BLOCK |
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554 | jne .fail |
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555 | |||
556 | call mutex_unlock |
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557 | |||
558 | mov eax, [esi+block_base] |
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559 | mov ecx, [esi+block_size] |
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560 | shr ecx, 12 |
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561 | call release_pages ;eax, ecx |
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562 | stdcall free_kernel_space, [base] |
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563 | pop esi ebx |
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564 | ret |
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565 | .fail: |
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566 | call mutex_unlock |
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567 | xor eax, eax |
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568 | pop esi ebx |
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569 | ret |
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570 | endp |
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571 | |||
572 | restore block_next |
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573 | restore block_prev |
||
574 | restore block_list |
||
575 | restore block_base |
||
576 | restore block_size |
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577 | restore block_flags |
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578 | |||
579 | ;;;;;;;;;;;;;; USER ;;;;;;;;;;;;;;;;; |
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580 | |||
2412 | Serge | 581 | HEAP_TOP equ 0x80000000 |
2288 | clevermous | 582 | |
583 | align 4 |
||
584 | proc init_heap |
||
585 | |||
586 | mov ebx, [current_slot] |
||
587 | mov eax, [ebx+APPDATA.heap_top] |
||
588 | test eax, eax |
||
589 | jz @F |
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590 | sub eax, [ebx+APPDATA.heap_base] |
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591 | sub eax, 4096 |
||
592 | ret |
||
593 | @@: |
||
594 | mov esi, [ebx+APPDATA.mem_size] |
||
595 | add esi, 4095 |
||
596 | and esi, not 4095 |
||
597 | mov [ebx+APPDATA.mem_size], esi |
||
598 | mov eax, HEAP_TOP |
||
599 | mov [ebx+APPDATA.heap_base], esi |
||
600 | mov [ebx+APPDATA.heap_top], eax |
||
601 | |||
602 | sub eax, esi |
||
603 | shr esi, 10 |
||
604 | mov ecx, eax |
||
605 | sub eax, 4096 |
||
606 | or ecx, FREE_BLOCK |
||
607 | mov [page_tabs+esi], ecx |
||
608 | ret |
||
609 | endp |
||
610 | |||
611 | align 4 |
||
612 | proc user_alloc stdcall, alloc_size:dword |
||
613 | |||
614 | push ebx |
||
615 | push esi |
||
616 | push edi |
||
617 | |||
618 | mov ecx, [alloc_size] |
||
619 | add ecx, (4095+4096) |
||
620 | and ecx, not 4095 |
||
621 | |||
622 | mov ebx, [current_slot] |
||
623 | mov esi, dword [ebx+APPDATA.heap_base] ; heap_base |
||
624 | mov edi, dword [ebx+APPDATA.heap_top] ; heap_top |
||
625 | l_0: |
||
626 | cmp esi, edi |
||
627 | jae m_exit |
||
628 | |||
629 | mov ebx, esi |
||
630 | shr ebx, 12 |
||
631 | mov eax, [page_tabs+ebx*4] |
||
632 | test al, FREE_BLOCK |
||
633 | jz test_used |
||
634 | and eax, 0xFFFFF000 |
||
635 | cmp eax, ecx ;alloc_size |
||
636 | jb m_next |
||
637 | jz @f |
||
638 | |||
639 | lea edx, [esi+ecx] |
||
640 | sub eax, ecx |
||
641 | or al, FREE_BLOCK |
||
642 | shr edx, 12 |
||
643 | mov [page_tabs+edx*4], eax |
||
644 | @@: |
||
645 | or ecx, USED_BLOCK |
||
646 | mov [page_tabs+ebx*4], ecx |
||
647 | shr ecx, 12 |
||
648 | inc ebx |
||
649 | dec ecx |
||
650 | jz .no |
||
651 | @@: |
||
652 | mov dword [page_tabs+ebx*4], 2 |
||
653 | inc ebx |
||
654 | dec ecx |
||
655 | jnz @B |
||
656 | .no: |
||
657 | |||
658 | mov edx, [current_slot] |
||
659 | mov ebx, [alloc_size] |
||
660 | add ebx, 0xFFF |
||
661 | and ebx, not 0xFFF |
||
662 | add ebx, [edx+APPDATA.mem_size] |
||
663 | call update_mem_size |
||
664 | |||
665 | lea eax, [esi+4096] |
||
666 | |||
667 | pop edi |
||
668 | pop esi |
||
669 | pop ebx |
||
670 | ret |
||
671 | test_used: |
||
672 | test al, USED_BLOCK |
||
673 | jz m_exit |
||
674 | |||
675 | and eax, 0xFFFFF000 |
||
676 | m_next: |
||
677 | add esi, eax |
||
678 | jmp l_0 |
||
679 | m_exit: |
||
680 | xor eax, eax |
||
681 | pop edi |
||
682 | pop esi |
||
683 | pop ebx |
||
684 | ret |
||
685 | endp |
||
686 | |||
687 | align 4 |
||
688 | proc user_alloc_at stdcall, address:dword, alloc_size:dword |
||
689 | |||
690 | push ebx |
||
691 | push esi |
||
692 | push edi |
||
693 | |||
694 | mov ebx, [current_slot] |
||
695 | mov edx, [address] |
||
696 | and edx, not 0xFFF |
||
697 | mov [address], edx |
||
698 | sub edx, 0x1000 |
||
699 | jb .error |
||
700 | mov esi, [ebx+APPDATA.heap_base] |
||
701 | mov edi, [ebx+APPDATA.heap_top] |
||
702 | cmp edx, esi |
||
703 | jb .error |
||
704 | .scan: |
||
705 | cmp esi, edi |
||
706 | jae .error |
||
707 | mov ebx, esi |
||
708 | shr ebx, 12 |
||
709 | mov eax, [page_tabs+ebx*4] |
||
710 | mov ecx, eax |
||
711 | and ecx, 0xFFFFF000 |
||
712 | add ecx, esi |
||
713 | cmp edx, ecx |
||
714 | jb .found |
||
715 | mov esi, ecx |
||
716 | jmp .scan |
||
717 | .error: |
||
718 | xor eax, eax |
||
719 | pop edi |
||
720 | pop esi |
||
721 | pop ebx |
||
722 | ret |
||
723 | .found: |
||
724 | test al, FREE_BLOCK |
||
725 | jz .error |
||
726 | mov eax, ecx |
||
727 | sub eax, edx |
||
728 | sub eax, 0x1000 |
||
729 | cmp eax, [alloc_size] |
||
730 | jb .error |
||
731 | |||
732 | ; Here we have 1 big free block which includes requested area. |
||
733 | ; In general, 3 other blocks must be created instead: |
||
734 | ; free at [esi, edx); |
||
735 | ; busy at [edx, edx+0x1000+ALIGN_UP(alloc_size,0x1000)); |
||
736 | ; free at [edx+0x1000+ALIGN_UP(alloc_size,0x1000), ecx) |
||
737 | ; First or third block (or both) may be absent. |
||
738 | mov eax, edx |
||
739 | sub eax, esi |
||
740 | jz .nofirst |
||
741 | or al, FREE_BLOCK |
||
742 | mov [page_tabs+ebx*4], eax |
||
743 | .nofirst: |
||
744 | mov eax, [alloc_size] |
||
745 | add eax, 0x1FFF |
||
746 | and eax, not 0xFFF |
||
747 | mov ebx, edx |
||
748 | add edx, eax |
||
749 | shr ebx, 12 |
||
750 | or al, USED_BLOCK |
||
751 | mov [page_tabs+ebx*4], eax |
||
752 | shr eax, 12 |
||
753 | dec eax |
||
754 | jz .second_nofill |
||
755 | inc ebx |
||
756 | .fill: |
||
757 | mov dword [page_tabs+ebx*4], 2 |
||
758 | inc ebx |
||
759 | dec eax |
||
760 | jnz .fill |
||
761 | .second_nofill: |
||
762 | sub ecx, edx |
||
763 | jz .nothird |
||
764 | or cl, FREE_BLOCK |
||
765 | mov [page_tabs+ebx*4], ecx |
||
766 | .nothird: |
||
767 | |||
768 | mov edx, [current_slot] |
||
769 | mov ebx, [alloc_size] |
||
770 | add ebx, 0xFFF |
||
771 | and ebx, not 0xFFF |
||
772 | add ebx, [edx+APPDATA.mem_size] |
||
773 | call update_mem_size |
||
774 | |||
775 | mov eax, [address] |
||
776 | |||
777 | pop edi |
||
778 | pop esi |
||
779 | pop ebx |
||
780 | ret |
||
781 | endp |
||
782 | |||
783 | align 4 |
||
784 | proc user_free stdcall, base:dword |
||
785 | |||
786 | push esi |
||
787 | |||
788 | mov esi, [base] |
||
789 | test esi, esi |
||
790 | jz .exit |
||
791 | |||
792 | push ebx |
||
793 | |||
794 | xor ebx, ebx |
||
795 | shr esi, 12 |
||
796 | mov eax, [page_tabs+(esi-1)*4] |
||
797 | test al, USED_BLOCK |
||
798 | jz .cantfree |
||
799 | test al, DONT_FREE_BLOCK |
||
800 | jnz .cantfree |
||
801 | |||
802 | and eax, not 4095 |
||
803 | mov ecx, eax |
||
804 | or al, FREE_BLOCK |
||
805 | mov [page_tabs+(esi-1)*4], eax |
||
806 | sub ecx, 4096 |
||
807 | mov ebx, ecx |
||
808 | shr ecx, 12 |
||
809 | jz .released |
||
810 | .release: |
||
811 | xor eax, eax |
||
812 | xchg eax, [page_tabs+esi*4] |
||
813 | test al, 1 |
||
814 | jz @F |
||
815 | test eax, PG_SHARED |
||
816 | jnz @F |
||
817 | call free_page |
||
818 | mov eax, esi |
||
819 | shl eax, 12 |
||
820 | invlpg [eax] |
||
821 | @@: |
||
822 | inc esi |
||
823 | dec ecx |
||
824 | jnz .release |
||
825 | .released: |
||
826 | push edi |
||
827 | |||
828 | mov edx, [current_slot] |
||
829 | mov esi, dword [edx+APPDATA.heap_base] |
||
830 | mov edi, dword [edx+APPDATA.heap_top] |
||
831 | sub ebx, [edx+APPDATA.mem_size] |
||
832 | neg ebx |
||
833 | call update_mem_size |
||
834 | call user_normalize |
||
835 | pop edi |
||
836 | pop ebx |
||
837 | pop esi |
||
838 | ret |
||
839 | .exit: |
||
840 | xor eax, eax |
||
841 | inc eax |
||
842 | pop esi |
||
843 | ret |
||
844 | .cantfree: |
||
845 | xor eax, eax |
||
846 | pop ebx |
||
847 | pop esi |
||
848 | ret |
||
849 | endp |
||
850 | |||
2400 | Serge | 851 | |
852 | align 4 |
||
853 | proc user_unmap stdcall, base:dword, offset:dword, size:dword |
||
854 | |||
855 | push ebx |
||
856 | |||
857 | mov ebx, [base] ; must be valid pointer |
||
858 | test ebx, ebx |
||
859 | jz .error |
||
860 | |||
861 | mov edx, [offset] ; check offset |
||
862 | add edx, ebx ; must be below 2Gb app limit |
||
863 | js .error |
||
864 | |||
865 | shr ebx, 12 ; chek block attributes |
||
866 | lea ebx, [page_tabs+ebx*4] |
||
867 | mov eax, [ebx-4] ; block attributes |
||
868 | test al, USED_BLOCK |
||
869 | jz .error |
||
870 | test al, DONT_FREE_BLOCK |
||
871 | jnz .error |
||
872 | |||
873 | shr edx, 12 |
||
874 | lea edx, [page_tabs+edx*4] ; unmap offset |
||
875 | |||
876 | mov ecx, [size] |
||
877 | add ecx, 4095 |
||
878 | shr ecx, 12 ; unmap size in pages |
||
879 | |||
880 | shr eax, 12 ; block size + 1 page |
||
881 | lea ebx, [ebx+eax*4-4] ; block end ptr |
||
882 | lea eax, [edx+ecx*4] ; unmap end ptr |
||
883 | |||
884 | cmp eax, ebx ; check for overflow |
||
885 | ja .error |
||
886 | |||
887 | mov ebx, [offset] |
||
888 | and ebx, not 4095 ; is it required ? |
||
889 | |||
890 | .unmap: |
||
891 | mov eax, [edx] ; get page addres |
||
892 | test al, 1 ; page mapped ? |
||
893 | jz @F |
||
894 | test eax, PG_SHARED ; page shared ? |
||
895 | jnz @F |
||
896 | mov [page_tabs+edx*4], dword 2 |
||
897 | ; mark page as reserved |
||
898 | invlpg [ebx] ; when we start using |
||
899 | call free_page ; empty c-o-w page instead this ? |
||
900 | @@: |
||
901 | add ebx, 4096 |
||
902 | add edx, 4 |
||
903 | dec ecx |
||
904 | jnz .unmap |
||
905 | |||
906 | pop ebx |
||
907 | or al, 1 ; return non zero on success |
||
908 | ret |
||
909 | .error: |
||
910 | pop ebx |
||
911 | xor eax, eax ; something wrong |
||
912 | ret |
||
913 | endp |
||
914 | |||
915 | align 4 |
||
2288 | clevermous | 916 | user_normalize: |
917 | ; in: esi=heap_base, edi=heap_top |
||
918 | ; out: eax=0 <=> OK |
||
919 | ; destroys: ebx,edx,esi,edi |
||
920 | shr esi, 12 |
||
921 | shr edi, 12 |
||
922 | @@: |
||
923 | mov eax, [page_tabs+esi*4] |
||
924 | test al, USED_BLOCK |
||
925 | jz .test_free |
||
926 | shr eax, 12 |
||
927 | add esi, eax |
||
928 | jmp @B |
||
929 | .test_free: |
||
930 | test al, FREE_BLOCK |
||
931 | jz .err |
||
932 | mov edx, eax |
||
933 | shr edx, 12 |
||
934 | add edx, esi |
||
935 | cmp edx, edi |
||
936 | jae .exit |
||
937 | |||
938 | mov ebx, [page_tabs+edx*4] |
||
939 | test bl, USED_BLOCK |
||
940 | jz .next_free |
||
941 | |||
942 | shr ebx, 12 |
||
943 | add edx, ebx |
||
944 | mov esi, edx |
||
945 | jmp @B |
||
946 | .next_free: |
||
947 | test bl, FREE_BLOCK |
||
948 | jz .err |
||
949 | and dword [page_tabs+edx*4], 0 |
||
950 | add eax, ebx |
||
951 | and eax, not 4095 |
||
952 | or eax, FREE_BLOCK |
||
953 | mov [page_tabs+esi*4], eax |
||
954 | jmp @B |
||
955 | .exit: |
||
956 | xor eax, eax |
||
957 | inc eax |
||
958 | ret |
||
959 | .err: |
||
960 | xor eax, eax |
||
961 | ret |
||
962 | |||
963 | user_realloc: |
||
964 | ; in: eax = pointer, ebx = new size |
||
965 | ; out: eax = new pointer or NULL |
||
966 | test eax, eax |
||
967 | jnz @f |
||
968 | ; realloc(NULL,sz) - same as malloc(sz) |
||
969 | push ebx |
||
970 | call user_alloc |
||
971 | ret |
||
972 | @@: |
||
973 | push ecx edx |
||
974 | lea ecx, [eax - 0x1000] |
||
975 | shr ecx, 12 |
||
976 | mov edx, [page_tabs+ecx*4] |
||
977 | test dl, USED_BLOCK |
||
978 | jnz @f |
||
979 | ; attempt to realloc invalid pointer |
||
980 | .ret0: |
||
981 | pop edx ecx |
||
982 | xor eax, eax |
||
983 | ret |
||
984 | @@: |
||
985 | test dl, DONT_FREE_BLOCK |
||
986 | jnz .ret0 |
||
987 | add ebx, 0x1FFF |
||
988 | shr edx, 12 |
||
989 | shr ebx, 12 |
||
990 | ; edx = allocated size, ebx = new size |
||
991 | add edx, ecx |
||
992 | add ebx, ecx |
||
993 | cmp edx, ebx |
||
994 | jb .realloc_add |
||
995 | ; release part of allocated memory |
||
996 | .loop: |
||
997 | cmp edx, ebx |
||
998 | jz .release_done |
||
999 | dec edx |
||
1000 | xor eax, eax |
||
1001 | xchg eax, [page_tabs+edx*4] |
||
1002 | test al, 1 |
||
1003 | jz .loop |
||
1004 | call free_page |
||
1005 | mov eax, edx |
||
1006 | shl eax, 12 |
||
1007 | invlpg [eax] |
||
1008 | jmp .loop |
||
1009 | .release_done: |
||
1010 | sub ebx, ecx |
||
1011 | cmp ebx, 1 |
||
1012 | jnz .nofreeall |
||
1013 | mov eax, [page_tabs+ecx*4] |
||
1014 | and eax, not 0xFFF |
||
1015 | mov edx, [current_slot] |
||
1016 | mov ebx, [APPDATA.mem_size+edx] |
||
1017 | sub ebx, eax |
||
1018 | add ebx, 0x1000 |
||
1019 | or al, FREE_BLOCK |
||
1020 | mov [page_tabs+ecx*4], eax |
||
1021 | push esi edi |
||
1022 | mov esi, [APPDATA.heap_base+edx] |
||
1023 | mov edi, [APPDATA.heap_top+edx] |
||
1024 | call update_mem_size |
||
1025 | call user_normalize |
||
1026 | pop edi esi |
||
1027 | jmp .ret0 ; all freed |
||
1028 | .nofreeall: |
||
1029 | sub edx, ecx |
||
1030 | shl ebx, 12 |
||
1031 | or ebx, USED_BLOCK |
||
1032 | xchg [page_tabs+ecx*4], ebx |
||
1033 | shr ebx, 12 |
||
1034 | sub ebx, edx |
||
1035 | push ebx ecx edx |
||
1036 | mov edx, [current_slot] |
||
1037 | shl ebx, 12 |
||
1038 | sub ebx, [APPDATA.mem_size+edx] |
||
1039 | neg ebx |
||
1040 | call update_mem_size |
||
1041 | pop edx ecx ebx |
||
1042 | lea eax, [ecx+1] |
||
1043 | shl eax, 12 |
||
1044 | push eax |
||
1045 | add ecx, edx |
||
1046 | lea edx, [ecx+ebx] |
||
1047 | shl ebx, 12 |
||
1048 | jz .ret |
||
1049 | push esi |
||
1050 | mov esi, [current_slot] |
||
1051 | mov esi, [APPDATA.heap_top+esi] |
||
1052 | shr esi, 12 |
||
1053 | @@: |
||
1054 | cmp edx, esi |
||
1055 | jae .merge_done |
||
1056 | mov eax, [page_tabs+edx*4] |
||
1057 | test al, USED_BLOCK |
||
1058 | jnz .merge_done |
||
1059 | and dword [page_tabs+edx*4], 0 |
||
1060 | shr eax, 12 |
||
1061 | add edx, eax |
||
1062 | shl eax, 12 |
||
1063 | add ebx, eax |
||
1064 | jmp @b |
||
1065 | .merge_done: |
||
1066 | pop esi |
||
1067 | or ebx, FREE_BLOCK |
||
1068 | mov [page_tabs+ecx*4], ebx |
||
1069 | .ret: |
||
1070 | pop eax edx ecx |
||
1071 | ret |
||
1072 | .realloc_add: |
||
1073 | ; get some additional memory |
||
1074 | mov eax, [current_slot] |
||
1075 | mov eax, [APPDATA.heap_top+eax] |
||
1076 | shr eax, 12 |
||
1077 | cmp edx, eax |
||
1078 | jae .cant_inplace |
||
1079 | mov eax, [page_tabs+edx*4] |
||
1080 | test al, FREE_BLOCK |
||
1081 | jz .cant_inplace |
||
1082 | shr eax, 12 |
||
1083 | add eax, edx |
||
1084 | sub eax, ebx |
||
1085 | jb .cant_inplace |
||
1086 | jz @f |
||
1087 | shl eax, 12 |
||
1088 | or al, FREE_BLOCK |
||
1089 | mov [page_tabs+ebx*4], eax |
||
1090 | @@: |
||
1091 | mov eax, ebx |
||
1092 | sub eax, ecx |
||
1093 | shl eax, 12 |
||
1094 | or al, USED_BLOCK |
||
1095 | mov [page_tabs+ecx*4], eax |
||
1096 | lea eax, [ecx+1] |
||
1097 | shl eax, 12 |
||
1098 | push eax |
||
1099 | push edi |
||
1100 | lea edi, [page_tabs+edx*4] |
||
1101 | mov eax, 2 |
||
1102 | sub ebx, edx |
||
1103 | mov ecx, ebx |
||
1104 | cld |
||
1105 | rep stosd |
||
1106 | pop edi |
||
1107 | mov edx, [current_slot] |
||
1108 | shl ebx, 12 |
||
1109 | add ebx, [APPDATA.mem_size+edx] |
||
1110 | call update_mem_size |
||
1111 | pop eax edx ecx |
||
1112 | ret |
||
1113 | .cant_inplace: |
||
1114 | push esi edi |
||
1115 | mov eax, [current_slot] |
||
1116 | mov esi, [APPDATA.heap_base+eax] |
||
1117 | mov edi, [APPDATA.heap_top+eax] |
||
1118 | shr esi, 12 |
||
1119 | shr edi, 12 |
||
1120 | sub ebx, ecx |
||
1121 | .find_place: |
||
1122 | cmp esi, edi |
||
1123 | jae .place_not_found |
||
1124 | mov eax, [page_tabs+esi*4] |
||
1125 | test al, FREE_BLOCK |
||
1126 | jz .next_place |
||
1127 | shr eax, 12 |
||
1128 | cmp eax, ebx |
||
1129 | jae .place_found |
||
1130 | add esi, eax |
||
1131 | jmp .find_place |
||
1132 | .next_place: |
||
1133 | shr eax, 12 |
||
1134 | add esi, eax |
||
1135 | jmp .find_place |
||
1136 | .place_not_found: |
||
1137 | pop edi esi |
||
1138 | jmp .ret0 |
||
1139 | .place_found: |
||
1140 | sub eax, ebx |
||
1141 | jz @f |
||
1142 | push esi |
||
1143 | add esi, ebx |
||
1144 | shl eax, 12 |
||
1145 | or al, FREE_BLOCK |
||
1146 | mov [page_tabs+esi*4], eax |
||
1147 | pop esi |
||
1148 | @@: |
||
1149 | mov eax, ebx |
||
1150 | shl eax, 12 |
||
1151 | or al, USED_BLOCK |
||
1152 | mov [page_tabs+esi*4], eax |
||
1153 | inc esi |
||
1154 | mov eax, esi |
||
1155 | shl eax, 12 |
||
1156 | push eax |
||
1157 | mov eax, [page_tabs+ecx*4] |
||
1158 | and eax, not 0xFFF |
||
1159 | or al, FREE_BLOCK |
||
1160 | sub edx, ecx |
||
1161 | mov [page_tabs+ecx*4], eax |
||
1162 | inc ecx |
||
1163 | dec ebx |
||
1164 | dec edx |
||
1165 | jz .no |
||
1166 | @@: |
||
1167 | xor eax, eax |
||
1168 | xchg eax, [page_tabs+ecx*4] |
||
1169 | mov [page_tabs+esi*4], eax |
||
1170 | mov eax, ecx |
||
1171 | shl eax, 12 |
||
1172 | invlpg [eax] |
||
1173 | inc esi |
||
1174 | inc ecx |
||
1175 | dec ebx |
||
1176 | dec edx |
||
1177 | jnz @b |
||
1178 | .no: |
||
1179 | push ebx |
||
1180 | mov edx, [current_slot] |
||
1181 | shl ebx, 12 |
||
1182 | add ebx, [APPDATA.mem_size+edx] |
||
1183 | call update_mem_size |
||
1184 | pop ebx |
||
1185 | @@: |
||
1186 | mov dword [page_tabs+esi*4], 2 |
||
1187 | inc esi |
||
1188 | dec ebx |
||
1189 | jnz @b |
||
1190 | pop eax edi esi edx ecx |
||
1191 | ret |
||
1192 | |||
1193 | if 0 |
||
1194 | align 4 |
||
1195 | proc alloc_dll |
||
1196 | pushf |
||
1197 | cli |
||
1198 | bsf eax, [dll_map] |
||
1199 | jnz .find |
||
1200 | popf |
||
1201 | xor eax, eax |
||
1202 | ret |
||
1203 | .find: |
||
1204 | btr [dll_map], eax |
||
1205 | popf |
||
1206 | shl eax, 5 |
||
1207 | add eax, dll_tab |
||
1208 | ret |
||
1209 | endp |
||
1210 | |||
1211 | align 4 |
||
1212 | proc alloc_service |
||
1213 | pushf |
||
1214 | cli |
||
1215 | bsf eax, [srv_map] |
||
1216 | jnz .find |
||
1217 | popf |
||
1218 | xor eax, eax |
||
1219 | ret |
||
1220 | .find: |
||
1221 | btr [srv_map], eax |
||
1222 | popf |
||
1223 | shl eax, 0x02 |
||
1224 | lea eax, [srv_tab+eax+eax*8] ;srv_tab+eax*36 |
||
1225 | ret |
||
1226 | endp |
||
1227 | |||
1228 | end if |
||
1229 | |||
1230 | |||
1231 | ;;;;;;;;;;;;;; SHARED ;;;;;;;;;;;;;;;;; |
||
1232 | |||
1233 | |||
1234 | ; param |
||
1235 | ; eax= shm_map object |
||
1236 | |||
1237 | align 4 |
||
1238 | destroy_smap: |
||
1239 | |||
1240 | pushfd |
||
1241 | cli |
||
1242 | |||
1243 | push esi |
||
1244 | push edi |
||
1245 | |||
1246 | mov edi, eax |
||
1247 | mov esi, [eax+SMAP.parent] |
||
1248 | test esi, esi |
||
1249 | jz .done |
||
1250 | |||
1251 | lock dec [esi+SMEM.refcount] |
||
1252 | jnz .done |
||
1253 | |||
1254 | mov ecx, [esi+SMEM.bk] |
||
1255 | mov edx, [esi+SMEM.fd] |
||
1256 | |||
1257 | mov [ecx+SMEM.fd], edx |
||
1258 | mov [edx+SMEM.bk], ecx |
||
1259 | |||
1260 | stdcall kernel_free, [esi+SMEM.base] |
||
1261 | mov eax, esi |
||
1262 | call free |
||
1263 | .done: |
||
1264 | mov eax, edi |
||
1265 | call destroy_kernel_object |
||
1266 | |||
1267 | pop edi |
||
1268 | pop esi |
||
1269 | popfd |
||
1270 | |||
1271 | ret |
||
1272 | |||
1273 | E_NOTFOUND equ 5 |
||
1274 | E_ACCESS equ 10 |
||
1275 | E_NOMEM equ 30 |
||
1276 | E_PARAM equ 33 |
||
1277 | |||
1278 | SHM_READ equ 0 |
||
1279 | SHM_WRITE equ 1 |
||
1280 | |||
1281 | SHM_ACCESS_MASK equ 3 |
||
1282 | |||
1283 | SHM_OPEN equ (0 shl 2) |
||
1284 | SHM_OPEN_ALWAYS equ (1 shl 2) |
||
1285 | SHM_CREATE equ (2 shl 2) |
||
1286 | |||
1287 | SHM_OPEN_MASK equ (3 shl 2) |
||
1288 | |||
1289 | align 4 |
||
1290 | proc shmem_open stdcall name:dword, size:dword, access:dword |
||
1291 | locals |
||
1292 | action dd ? |
||
1293 | owner_access dd ? |
||
1294 | mapped dd ? |
||
1295 | endl |
||
1296 | |||
1297 | push ebx |
||
1298 | push esi |
||
1299 | push edi |
||
1300 | |||
1301 | mov [mapped], 0 |
||
1302 | mov [owner_access], 0 |
||
1303 | |||
1304 | pushfd ;mutex required |
||
1305 | cli |
||
1306 | |||
1307 | mov eax, [access] |
||
1308 | and eax, SHM_OPEN_MASK |
||
1309 | mov [action], eax |
||
1310 | |||
1311 | mov ebx, [name] |
||
1312 | test ebx, ebx |
||
1313 | mov edx, E_PARAM |
||
1314 | jz .fail |
||
1315 | |||
1316 | mov esi, [shmem_list.fd] |
||
1317 | align 4 |
||
1318 | @@: |
||
1319 | cmp esi, shmem_list |
||
1320 | je .not_found |
||
1321 | |||
1322 | lea edx, [esi+SMEM.name]; link , base, size |
||
1323 | stdcall strncmp, edx, ebx, 32 |
||
1324 | test eax, eax |
||
1325 | je .found |
||
1326 | |||
1327 | mov esi, [esi+SMEM.fd] |
||
1328 | jmp @B |
||
1329 | |||
1330 | .not_found: |
||
1331 | mov eax, [action] |
||
1332 | |||
1333 | cmp eax, SHM_OPEN |
||
1334 | mov edx, E_NOTFOUND |
||
1335 | je .fail |
||
1336 | |||
1337 | cmp eax, SHM_CREATE |
||
1338 | mov edx, E_PARAM |
||
1339 | je .create_shm |
||
1340 | |||
1341 | cmp eax, SHM_OPEN_ALWAYS |
||
1342 | jne .fail |
||
1343 | |||
1344 | .create_shm: |
||
1345 | |||
1346 | mov ecx, [size] |
||
1347 | test ecx, ecx |
||
1348 | jz .fail |
||
1349 | |||
1350 | add ecx, 4095 |
||
1351 | and ecx, -4096 |
||
1352 | mov [size], ecx |
||
1353 | |||
2384 | hidnplayr | 1354 | mov eax, sizeof.SMEM |
2288 | clevermous | 1355 | call malloc |
1356 | test eax, eax |
||
1357 | mov esi, eax |
||
1358 | mov edx, E_NOMEM |
||
1359 | jz .fail |
||
1360 | |||
1361 | stdcall kernel_alloc, [size] |
||
1362 | test eax, eax |
||
1363 | mov [mapped], eax |
||
1364 | mov edx, E_NOMEM |
||
1365 | jz .cleanup |
||
1366 | |||
1367 | mov ecx, [size] |
||
1368 | mov edx, [access] |
||
1369 | and edx, SHM_ACCESS_MASK |
||
1370 | |||
1371 | mov [esi+SMEM.base], eax |
||
1372 | mov [esi+SMEM.size], ecx |
||
1373 | mov [esi+SMEM.access], edx |
||
1374 | mov [esi+SMEM.refcount], 0 |
||
1375 | mov [esi+SMEM.name+28], 0 |
||
1376 | |||
1377 | lea eax, [esi+SMEM.name] |
||
1378 | stdcall strncpy, eax, [name], 31 |
||
1379 | |||
1380 | mov eax, [shmem_list.fd] |
||
1381 | mov [esi+SMEM.bk], shmem_list |
||
1382 | mov [esi+SMEM.fd], eax |
||
1383 | |||
1384 | mov [eax+SMEM.bk], esi |
||
1385 | mov [shmem_list.fd], esi |
||
1386 | |||
1387 | mov [action], SHM_OPEN |
||
1388 | mov [owner_access], SHM_WRITE |
||
1389 | |||
1390 | .found: |
||
1391 | mov eax, [action] |
||
1392 | |||
1393 | cmp eax, SHM_CREATE |
||
1394 | mov edx, E_ACCESS |
||
1395 | je .exit |
||
1396 | |||
1397 | cmp eax, SHM_OPEN |
||
1398 | mov edx, E_PARAM |
||
1399 | je .create_map |
||
1400 | |||
1401 | cmp eax, SHM_OPEN_ALWAYS |
||
1402 | jne .fail |
||
1403 | |||
1404 | .create_map: |
||
1405 | |||
1406 | mov eax, [access] |
||
1407 | and eax, SHM_ACCESS_MASK |
||
1408 | cmp eax, [esi+SMEM.access] |
||
1409 | mov [access], eax |
||
1410 | mov edx, E_ACCESS |
||
1411 | ja .fail |
||
1412 | |||
1413 | mov ebx, [CURRENT_TASK] |
||
1414 | shl ebx, 5 |
||
1415 | mov ebx, [CURRENT_TASK+ebx+4] |
||
2384 | hidnplayr | 1416 | mov eax, sizeof.SMAP |
2288 | clevermous | 1417 | |
1418 | call create_kernel_object |
||
1419 | test eax, eax |
||
1420 | mov edi, eax |
||
1421 | mov edx, E_NOMEM |
||
1422 | jz .fail |
||
1423 | |||
1424 | inc [esi+SMEM.refcount] |
||
1425 | |||
1426 | mov [edi+SMAP.magic], 'SMAP' |
||
1427 | mov [edi+SMAP.destroy], destroy_smap |
||
1428 | mov [edi+SMAP.parent], esi |
||
1429 | mov [edi+SMAP.base], 0 |
||
1430 | |||
1431 | stdcall user_alloc, [esi+SMEM.size] |
||
1432 | test eax, eax |
||
1433 | mov [mapped], eax |
||
1434 | mov edx, E_NOMEM |
||
1435 | jz .cleanup2 |
||
1436 | |||
1437 | mov [edi+SMAP.base], eax |
||
1438 | |||
1439 | mov ecx, [esi+SMEM.size] |
||
1440 | mov [size], ecx |
||
1441 | |||
1442 | shr ecx, 12 |
||
1443 | shr eax, 10 |
||
1444 | |||
1445 | mov esi, [esi+SMEM.base] |
||
1446 | shr esi, 10 |
||
1447 | lea edi, [page_tabs+eax] |
||
1448 | add esi, page_tabs |
||
1449 | |||
1450 | mov edx, [access] |
||
1451 | or edx, [owner_access] |
||
1452 | shl edx, 1 |
||
1453 | or edx, PG_USER+PG_SHARED |
||
1454 | @@: |
||
1455 | lodsd |
||
1456 | and eax, 0xFFFFF000 |
||
1457 | or eax, edx |
||
1458 | stosd |
||
1459 | loop @B |
||
1460 | |||
1461 | xor edx, edx |
||
1462 | |||
1463 | cmp [owner_access], 0 |
||
1464 | jne .fail |
||
1465 | .exit: |
||
1466 | mov edx, [size] |
||
1467 | .fail: |
||
1468 | mov eax, [mapped] |
||
1469 | |||
1470 | popfd |
||
1471 | pop edi |
||
1472 | pop esi |
||
1473 | pop ebx |
||
1474 | ret |
||
1475 | .cleanup: |
||
1476 | mov [size], edx |
||
1477 | mov eax, esi |
||
1478 | call free |
||
1479 | jmp .exit |
||
1480 | |||
1481 | .cleanup2: |
||
1482 | mov [size], edx |
||
1483 | mov eax, edi |
||
1484 | call destroy_smap |
||
1485 | jmp .exit |
||
1486 | endp |
||
1487 | |||
1488 | align 4 |
||
1489 | proc shmem_close stdcall, name:dword |
||
1490 | |||
1491 | mov eax, [name] |
||
1492 | test eax, eax |
||
1493 | jz .fail |
||
1494 | |||
1495 | push esi |
||
1496 | push edi |
||
1497 | pushfd |
||
1498 | cli |
||
1499 | |||
1500 | mov esi, [current_slot] |
||
1501 | add esi, APP_OBJ_OFFSET |
||
1502 | .next: |
||
1503 | mov eax, [esi+APPOBJ.fd] |
||
1504 | test eax, eax |
||
1505 | jz @F |
||
1506 | |||
1507 | cmp eax, esi |
||
1508 | mov esi, eax |
||
1509 | je @F |
||
1510 | |||
1511 | cmp [eax+SMAP.magic], 'SMAP' |
||
1512 | jne .next |
||
1513 | |||
1514 | mov edi, [eax+SMAP.parent] |
||
1515 | test edi, edi |
||
1516 | jz .next |
||
1517 | |||
1518 | lea edi, [edi+SMEM.name] |
||
1519 | stdcall strncmp, [name], edi, 32 |
||
1520 | test eax, eax |
||
1521 | jne .next |
||
1522 | |||
1523 | stdcall user_free, [esi+SMAP.base] |
||
1524 | |||
1525 | mov eax, esi |
||
1526 | call [esi+APPOBJ.destroy] |
||
1527 | @@: |
||
1528 | popfd |
||
1529 | pop edi |
||
1530 | pop esi |
||
1531 | .fail: |
||
1532 | ret |
||
1533 | endp=> |