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Rev | Author | Line No. | Line |
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431 | serge | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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3 | ;; Copyright (C) KolibriOS team 2004-2007. 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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164 | serge | 7 | |
593 | mikedld | 8 | $Revision: 593 $ |
9 | |||
10 | |||
164 | serge | 11 | struc MEM_BLOCK |
12 | { .next_block dd ? |
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13 | .prev_block dd ? ;+4 |
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357 | serge | 14 | .list_fd dd ? ;+8 |
15 | .list_bk dd ? ;+12 |
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164 | serge | 16 | .base dd ? ;+16 |
17 | .size dd ? ;+20 |
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18 | .flags dd ? ;+24 |
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19 | .handle dd ? ;+28 |
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20 | } |
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21 | |||
357 | serge | 22 | MEM_LIST_OFFSET equ 8 |
164 | serge | 23 | FREE_BLOCK equ 4 |
24 | USED_BLOCK equ 8 |
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546 | diamond | 25 | DONT_FREE_BLOCK equ 10h |
164 | serge | 26 | |
27 | virtual at 0 |
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28 | MEM_BLOCK MEM_BLOCK |
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29 | end virtual |
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30 | |||
31 | MEM_BLOCK_SIZE equ 8*4 |
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32 | |||
33 | block_next equ MEM_BLOCK.next_block |
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34 | block_prev equ MEM_BLOCK.prev_block |
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357 | serge | 35 | list_fd equ MEM_BLOCK.list_fd |
36 | list_bk equ MEM_BLOCK.list_bk |
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164 | serge | 37 | block_base equ MEM_BLOCK.base |
38 | block_size equ MEM_BLOCK.size |
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39 | block_flags equ MEM_BLOCK.flags |
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40 | |||
41 | macro calc_index op |
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42 | { shr op, 12 |
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43 | dec op |
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44 | cmp op, 63 |
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45 | jna @f |
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46 | mov op, 63 |
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47 | @@: |
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48 | } |
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49 | |||
50 | macro remove_from_list op |
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357 | serge | 51 | { mov edx, [op+list_fd] |
52 | mov ecx, [op+list_bk] |
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164 | serge | 53 | test edx, edx |
54 | jz @f |
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357 | serge | 55 | mov [edx+list_bk], ecx |
164 | serge | 56 | @@: |
57 | test ecx, ecx |
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58 | jz @f |
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357 | serge | 59 | mov [ecx+list_fd], edx |
164 | serge | 60 | @@: |
357 | serge | 61 | mov [op+list_fd],0 |
62 | mov [op+list_bk],0 |
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164 | serge | 63 | } |
64 | |||
65 | macro remove_from_free op |
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66 | { |
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67 | remove_from_list op |
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68 | |||
69 | mov eax, [op+block_size] |
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70 | calc_index eax |
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71 | cmp [mem_block_list+eax*4], op |
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72 | jne @f |
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73 | mov [mem_block_list+eax*4], edx |
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74 | @@: |
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75 | cmp [mem_block_list+eax*4], 0 |
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76 | jne @f |
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77 | btr [mem_block_mask], eax |
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78 | @@: |
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79 | } |
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80 | |||
81 | macro remove_from_used op |
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82 | { |
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357 | serge | 83 | mov edx, [op+list_fd] |
84 | mov ecx, [op+list_bk] |
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85 | mov [edx+list_bk], ecx |
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86 | mov [ecx+list_fd], edx |
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87 | mov [op+list_fd], 0 |
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88 | mov [op+list_bk], 0 |
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164 | serge | 89 | } |
90 | |||
91 | align 4 |
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92 | proc init_kernel_heap |
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93 | |||
94 | mov ecx, 64/4 |
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95 | mov edi, mem_block_list |
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96 | xor eax, eax |
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97 | cld |
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98 | rep stosd |
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99 | |||
100 | mov ecx, 512/4 |
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101 | mov edi, mem_block_map |
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102 | not eax |
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103 | rep stosd |
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104 | |||
105 | mov [mem_block_start], mem_block_map |
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106 | mov [mem_block_end], mem_block_map+512 |
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107 | mov [mem_block_arr], HEAP_BASE |
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108 | |||
357 | serge | 109 | mov eax, mem_used.fd-MEM_LIST_OFFSET |
110 | mov [mem_used.fd], eax |
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111 | mov [mem_used.bk], eax |
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112 | |||
164 | serge | 113 | stdcall alloc_pages, dword 32 |
114 | mov ecx, 32 |
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115 | mov edx, eax |
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116 | mov edi, HEAP_BASE |
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117 | .l1: |
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118 | stdcall map_page,edi,edx,PG_SW |
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119 | add edi, 0x1000 |
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120 | add edx, 0x1000 |
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121 | dec ecx |
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122 | jnz .l1 |
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123 | |||
124 | mov edi, HEAP_BASE |
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357 | serge | 125 | mov ebx, HEAP_BASE+MEM_BLOCK_SIZE |
164 | serge | 126 | xor eax, eax |
127 | mov [edi+block_next], ebx |
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128 | mov [edi+block_prev], eax |
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357 | serge | 129 | mov [edi+list_fd], eax |
130 | mov [edi+list_bk], eax |
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164 | serge | 131 | mov [edi+block_base], HEAP_BASE |
132 | mov [edi+block_size], 4096*MEM_BLOCK_SIZE |
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133 | mov [edi+block_flags], USED_BLOCK |
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134 | |||
135 | mov [ebx+block_next], eax |
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136 | mov [ebx+block_prev], eax |
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357 | serge | 137 | mov [ebx+list_fd], eax |
138 | mov [ebx+list_bk], eax |
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164 | serge | 139 | mov [ebx+block_base], HEAP_BASE+4096*MEM_BLOCK_SIZE |
140 | |||
141 | mov ecx, [MEM_AMOUNT] |
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212 | serge | 142 | sub ecx, HEAP_BASE + 4096*MEM_BLOCK_SIZE |
170 | serge | 143 | mov [heap_size], ecx |
144 | mov [heap_free], ecx |
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164 | serge | 145 | mov [ebx+block_size], ecx |
146 | mov [ebx+block_flags], FREE_BLOCK |
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147 | |||
148 | mov [mem_block_mask], eax |
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149 | mov [mem_block_mask+4],0x80000000 |
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150 | |||
151 | mov [mem_block_list+63*4], ebx |
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152 | mov byte [mem_block_map], 0xFC |
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279 | serge | 153 | and [heap_mutex], 0 |
170 | serge | 154 | mov [heap_blocks], 4095 |
155 | mov [free_blocks], 4095 |
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164 | serge | 156 | ret |
157 | endp |
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158 | |||
369 | serge | 159 | ; param |
160 | ; eax= required size |
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161 | ; |
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162 | ; retval |
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163 | ; edi= memory block descriptor |
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164 | ; ebx= descriptor index |
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165 | |||
164 | serge | 166 | align 4 |
369 | serge | 167 | get_block: |
164 | serge | 168 | mov ecx, eax |
369 | serge | 169 | shr ecx, 12 |
170 | dec ecx |
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171 | cmp ecx, 63 |
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172 | jle .get_index |
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173 | mov ecx, 63 |
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174 | .get_index: |
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175 | lea esi, [mem_block_mask] |
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164 | serge | 176 | xor ebx, ebx |
369 | serge | 177 | or edx, -1 |
164 | serge | 178 | |
179 | cmp ecx, 32 |
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180 | jb .bit_test |
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181 | |||
182 | sub ecx, 32 |
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183 | add ebx, 32 |
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184 | add esi, 4 |
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185 | .bit_test: |
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186 | shl edx, cl |
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369 | serge | 187 | and edx, [esi] |
188 | .find: |
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189 | bsf edi, edx |
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164 | serge | 190 | jz .high_mask |
369 | serge | 191 | add ebx, edi |
192 | mov edi, [mem_block_list+ebx*4] |
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193 | .check_size: |
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194 | cmp eax, [edi+block_size] |
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195 | ja .next |
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164 | serge | 196 | ret |
197 | |||
198 | .high_mask: |
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199 | add esi, 4 |
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369 | serge | 200 | cmp esi, mem_block_mask+8 |
201 | jae .err |
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164 | serge | 202 | add ebx, 32 |
369 | serge | 203 | mov edx, [esi] |
204 | jmp .find |
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205 | .next: |
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206 | mov edi, [edi+list_fd] |
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207 | test edi, edi |
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208 | jnz .check_size |
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209 | .err: |
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210 | xor edi, edi |
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164 | serge | 211 | ret |
212 | |||
213 | align 4 |
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214 | proc alloc_mem_block |
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215 | |||
216 | mov ebx, [mem_block_start] |
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217 | mov ecx, [mem_block_end] |
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218 | .l1: |
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219 | bsf eax,[ebx]; |
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220 | jnz found |
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221 | add ebx,4 |
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222 | cmp ebx, ecx |
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223 | jb .l1 |
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224 | xor eax,eax |
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225 | ret |
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226 | |||
227 | found: |
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228 | btr [ebx], eax |
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229 | mov [mem_block_start],ebx |
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230 | sub ebx, mem_block_map |
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254 | serge | 231 | lea eax,[eax+ebx*8] |
164 | serge | 232 | shl eax, 5 |
233 | add eax, [mem_block_arr] |
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170 | serge | 234 | dec [free_blocks] |
164 | serge | 235 | ret |
236 | endp |
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237 | |||
238 | proc free_mem_block |
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357 | serge | 239 | mov dword [eax], 0 |
240 | mov dword [eax+4], 0 |
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241 | mov dword [eax+8], 0 |
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242 | mov dword [eax+12], 0 |
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243 | mov dword [eax+16], 0 |
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244 | ; mov dword [eax+20], 0 |
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245 | mov dword [eax+24], 0 |
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246 | mov dword [eax+28], 0 |
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247 | |||
164 | serge | 248 | sub eax, [mem_block_arr] |
249 | shr eax, 5 |
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250 | |||
251 | mov ebx, mem_block_map |
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252 | bts [ebx], eax |
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170 | serge | 253 | inc [free_blocks] |
164 | serge | 254 | shr eax, 3 |
255 | and eax, not 3 |
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256 | add eax, ebx |
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257 | cmp [mem_block_start], eax |
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258 | ja @f |
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259 | ret |
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260 | @@: |
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261 | mov [mem_block_start], eax |
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262 | ret |
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263 | .err: |
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264 | xor eax, eax |
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265 | ret |
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266 | endp |
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267 | |||
268 | align 4 |
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269 | proc alloc_kernel_space stdcall, size:dword |
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270 | local block_ind:DWORD |
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271 | |||
272 | mov eax, [size] |
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206 | serge | 273 | add eax, 4095 |
274 | and eax, not 4095 |
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164 | serge | 275 | mov [size], eax |
279 | serge | 276 | |
277 | mov ebx, heap_mutex |
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278 | call wait_mutex ;ebx |
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279 | |||
170 | serge | 280 | cmp eax, [heap_free] |
281 | ja .error |
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164 | serge | 282 | |
369 | serge | 283 | call get_block ; eax |
284 | test edi, edi |
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164 | serge | 285 | jz .error |
286 | |||
287 | cmp [edi+block_flags], FREE_BLOCK |
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288 | jne .error |
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289 | |||
290 | mov [block_ind], ebx ;index of allocated block |
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291 | |||
292 | mov eax, [edi+block_size] |
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293 | cmp eax, [size] |
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294 | je .m_eq_size |
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295 | |||
296 | call alloc_mem_block |
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297 | and eax, eax |
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298 | jz .error |
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299 | |||
300 | mov esi, eax ;esi - splitted block |
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301 | |||
302 | mov [esi+block_next], edi |
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303 | mov eax, [edi+block_prev] |
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304 | mov [esi+block_prev], eax |
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305 | mov [edi+block_prev], esi |
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357 | serge | 306 | mov [esi+list_fd], 0 |
307 | mov [esi+list_bk], 0 |
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164 | serge | 308 | and eax, eax |
309 | jz @f |
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310 | mov [eax+block_next], esi |
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311 | @@: |
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312 | mov ebx, [edi+block_base] |
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313 | mov [esi+block_base], ebx |
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314 | mov edx, [size] |
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315 | mov [esi+block_size], edx |
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316 | add [edi+block_base], edx |
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317 | sub [edi+block_size], edx |
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318 | |||
319 | mov eax, [edi+block_size] |
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320 | shr eax, 12 |
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321 | sub eax, 1 |
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322 | cmp eax, 63 |
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323 | jna @f |
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324 | mov eax, 63 |
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325 | @@: |
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326 | cmp eax, [block_ind] |
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327 | je .m_eq_ind |
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328 | |||
192 | serge | 329 | remove_from_list edi |
164 | serge | 330 | |
331 | mov ecx, [block_ind] |
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211 | serge | 332 | mov [mem_block_list+ecx*4], edx |
164 | serge | 333 | |
211 | serge | 334 | test edx, edx |
164 | serge | 335 | jnz @f |
336 | btr [mem_block_mask], ecx |
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337 | @@: |
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338 | mov edx, [mem_block_list+eax*4] |
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357 | serge | 339 | mov [edi+list_fd], edx |
164 | serge | 340 | test edx, edx |
341 | jz @f |
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357 | serge | 342 | mov [edx+list_bk], edi |
164 | serge | 343 | @@: |
344 | mov [mem_block_list+eax*4], edi |
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345 | bts [mem_block_mask], eax |
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346 | .m_eq_ind: |
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357 | serge | 347 | mov ecx, mem_used.fd-MEM_LIST_OFFSET |
348 | mov edx, [ecx+list_fd] |
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349 | mov [esi+list_fd], edx |
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350 | mov [esi+list_bk], ecx |
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351 | mov [ecx+list_fd], esi |
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352 | mov [edx+list_bk], esi |
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353 | |||
164 | serge | 354 | mov [esi+block_flags], USED_BLOCK |
355 | mov eax, [esi+block_base] |
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170 | serge | 356 | mov ebx, [size] |
357 | sub [heap_free], ebx |
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279 | serge | 358 | and [heap_mutex], 0 |
164 | serge | 359 | ret |
360 | .m_eq_size: |
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361 | remove_from_list edi |
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192 | serge | 362 | mov [mem_block_list+ebx*4], edx |
164 | serge | 363 | and edx, edx |
364 | jnz @f |
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192 | serge | 365 | btr [mem_block_mask], ebx |
164 | serge | 366 | @@: |
357 | serge | 367 | mov ecx, mem_used.fd-MEM_LIST_OFFSET |
368 | mov edx, [ecx+list_fd] |
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369 | mov [edi+list_fd], edx |
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370 | mov [edi+list_bk], ecx |
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371 | mov [ecx+list_fd], edi |
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372 | mov [edx+list_bk], edi |
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373 | |||
164 | serge | 374 | mov [edi+block_flags], USED_BLOCK |
375 | mov eax, [edi+block_base] |
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170 | serge | 376 | mov ebx, [size] |
377 | sub [heap_free], ebx |
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279 | serge | 378 | and [heap_mutex], 0 |
164 | serge | 379 | ret |
380 | .error: |
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381 | xor eax, eax |
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279 | serge | 382 | mov [heap_mutex], eax |
164 | serge | 383 | ret |
384 | endp |
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385 | |||
386 | align 4 |
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321 | diamond | 387 | proc free_kernel_space stdcall uses ebx ecx edx esi edi, base:dword |
164 | serge | 388 | |
279 | serge | 389 | mov ebx, heap_mutex |
390 | call wait_mutex ;ebx |
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391 | |||
164 | serge | 392 | mov eax, [base] |
357 | serge | 393 | mov esi, [mem_used.fd] |
164 | serge | 394 | @@: |
357 | serge | 395 | cmp esi, mem_used.fd-MEM_LIST_OFFSET |
396 | je .fail |
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164 | serge | 397 | |
398 | cmp [esi+block_base], eax |
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399 | je .found |
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357 | serge | 400 | mov esi, [esi+list_fd] |
164 | serge | 401 | jmp @b |
402 | .found: |
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403 | cmp [esi+block_flags], USED_BLOCK |
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404 | jne .fail |
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405 | |||
170 | serge | 406 | mov eax, [esi+block_size] |
407 | add [heap_free], eax |
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408 | |||
164 | serge | 409 | mov edi, [esi+block_next] |
410 | test edi, edi |
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411 | jz .prev |
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412 | |||
413 | cmp [edi+block_flags], FREE_BLOCK |
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414 | jne .prev |
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415 | |||
416 | remove_from_free edi |
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417 | |||
418 | mov edx, [edi+block_next] |
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419 | mov [esi+block_next], edx |
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420 | test edx, edx |
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421 | jz @f |
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422 | |||
423 | mov [edx+block_prev], esi |
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424 | @@: |
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425 | mov ecx, [edi+block_size] |
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426 | add [esi+block_size], ecx |
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427 | |||
428 | mov eax, edi |
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429 | call free_mem_block |
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430 | .prev: |
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431 | mov edi, [esi+block_prev] |
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432 | test edi, edi |
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433 | jz .insert |
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434 | |||
435 | cmp [edi+block_flags], FREE_BLOCK |
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436 | jne .insert |
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437 | |||
438 | remove_from_used esi |
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439 | |||
440 | mov edx, [esi+block_next] |
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441 | mov [edi+block_next], edx |
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442 | test edx, edx |
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443 | jz @f |
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444 | mov [edx+block_prev], edi |
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445 | @@: |
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446 | mov eax, esi |
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447 | call free_mem_block |
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448 | |||
449 | mov ecx, [edi+block_size] |
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450 | mov eax, [esi+block_size] |
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451 | add eax, ecx |
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452 | mov [edi+block_size], eax |
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453 | |||
454 | calc_index eax |
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455 | calc_index ecx |
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456 | cmp eax, ecx |
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457 | je .m_eq |
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458 | |||
459 | push ecx |
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460 | remove_from_list edi |
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461 | pop ecx |
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462 | |||
463 | cmp [mem_block_list+ecx*4], edi |
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464 | jne @f |
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465 | mov [mem_block_list+ecx*4], edx |
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466 | @@: |
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467 | cmp [mem_block_list+ecx*4], 0 |
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468 | jne @f |
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469 | btr [mem_block_mask], ecx |
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470 | @@: |
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471 | mov esi, [mem_block_list+eax*4] |
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472 | mov [mem_block_list+eax*4], edi |
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357 | serge | 473 | mov [edi+list_fd], esi |
164 | serge | 474 | test esi, esi |
475 | jz @f |
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357 | serge | 476 | mov [esi+list_bk], edi |
164 | serge | 477 | @@: |
478 | bts [mem_block_mask], eax |
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479 | .m_eq: |
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480 | xor eax, eax |
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279 | serge | 481 | mov [heap_mutex], eax |
321 | diamond | 482 | dec eax |
164 | serge | 483 | ret |
484 | .insert: |
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485 | remove_from_used esi |
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486 | |||
487 | mov eax, [esi+block_size] |
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488 | calc_index eax |
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489 | |||
490 | mov edi, [mem_block_list+eax*4] |
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491 | mov [mem_block_list+eax*4], esi |
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357 | serge | 492 | mov [esi+list_fd], edi |
164 | serge | 493 | test edi, edi |
494 | jz @f |
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357 | serge | 495 | mov [edi+list_bk], esi |
164 | serge | 496 | @@: |
497 | bts [mem_block_mask], eax |
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498 | mov [esi+block_flags],FREE_BLOCK |
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499 | xor eax, eax |
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279 | serge | 500 | mov [heap_mutex], eax |
321 | diamond | 501 | dec eax |
164 | serge | 502 | ret |
503 | .fail: |
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504 | xor eax, eax |
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279 | serge | 505 | mov [heap_mutex], eax |
164 | serge | 506 | ret |
507 | endp |
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508 | |||
509 | align 4 |
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510 | proc kernel_alloc stdcall, size:dword |
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511 | locals |
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512 | lin_addr dd ? |
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513 | pages_count dd ? |
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514 | endl |
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515 | |||
516 | mov eax, [size] |
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206 | serge | 517 | add eax, 4095 |
518 | and eax, not 4095; |
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164 | serge | 519 | mov [size], eax |
520 | and eax, eax |
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357 | serge | 521 | jz .err |
164 | serge | 522 | mov ebx, eax |
523 | shr ebx, 12 |
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524 | mov [pages_count], ebx |
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525 | |||
526 | stdcall alloc_kernel_space, eax |
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357 | serge | 527 | test eax, eax |
528 | jz .err |
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164 | serge | 529 | mov [lin_addr], eax |
530 | |||
531 | mov ecx, [pages_count] |
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532 | mov edx, eax |
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533 | mov ebx, ecx |
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534 | |||
535 | shr ecx, 3 |
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536 | jz .next |
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537 | |||
538 | and ebx, not 7 |
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539 | push ebx |
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540 | stdcall alloc_pages, ebx |
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541 | pop ecx ; yes ecx!!! |
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542 | and eax, eax |
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357 | serge | 543 | jz .err |
164 | serge | 544 | |
545 | mov edi, eax |
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546 | mov edx, [lin_addr] |
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547 | @@: |
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548 | stdcall map_page,edx,edi,dword PG_SW |
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549 | add edx, 0x1000 |
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550 | add edi, 0x1000 |
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551 | dec ecx |
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552 | jnz @B |
||
553 | .next: |
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554 | mov ecx, [pages_count] |
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555 | and ecx, 7 |
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556 | jz .end |
||
357 | serge | 557 | @@: |
558 | push ecx |
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164 | serge | 559 | call alloc_page |
560 | pop ecx |
||
561 | test eax, eax |
||
357 | serge | 562 | jz .err |
164 | serge | 563 | |
564 | stdcall map_page,edx,eax,dword PG_SW |
||
565 | add edx, 0x1000 |
||
566 | dec ecx |
||
567 | jnz @B |
||
568 | .end: |
||
569 | mov eax, [lin_addr] |
||
570 | ret |
||
357 | serge | 571 | .err: |
164 | serge | 572 | xor eax, eax |
573 | ret |
||
574 | endp |
||
575 | |||
576 | align 4 |
||
577 | proc kernel_free stdcall, base:dword |
||
321 | diamond | 578 | push ebx esi |
164 | serge | 579 | |
279 | serge | 580 | mov ebx, heap_mutex |
581 | call wait_mutex ;ebx |
||
582 | |||
164 | serge | 583 | mov eax, [base] |
357 | serge | 584 | mov esi, [mem_used.fd] |
164 | serge | 585 | @@: |
357 | serge | 586 | cmp esi, mem_used.fd-MEM_LIST_OFFSET |
587 | je .fail |
||
164 | serge | 588 | |
589 | cmp [esi+block_base], eax |
||
590 | je .found |
||
357 | serge | 591 | mov esi, [esi+list_fd] |
164 | serge | 592 | jmp @b |
593 | .found: |
||
594 | cmp [esi+block_flags], USED_BLOCK |
||
595 | jne .fail |
||
596 | |||
279 | serge | 597 | and [heap_mutex], 0 |
598 | |||
321 | diamond | 599 | push ecx |
164 | serge | 600 | mov ecx, [esi+block_size]; |
281 | serge | 601 | shr ecx, 12 |
279 | serge | 602 | call release_pages ;eax, ecx |
321 | diamond | 603 | pop ecx |
164 | serge | 604 | stdcall free_kernel_space, [base] |
321 | diamond | 605 | pop esi ebx |
279 | serge | 606 | ret |
164 | serge | 607 | .fail: |
279 | serge | 608 | and [heap_mutex], 0 |
321 | diamond | 609 | pop esi ebx |
164 | serge | 610 | ret |
611 | endp |
||
612 | |||
613 | restore block_next |
||
614 | restore block_prev |
||
615 | restore block_list |
||
616 | restore block_base |
||
617 | restore block_size |
||
618 | restore block_flags |
||
619 | |||
620 | ;;;;;;;;;;;;;; USER ;;;;;;;;;;;;;;;;; |
||
621 | |||
188 | serge | 622 | HEAP_TOP equ 0x5FC00000 |
623 | |||
164 | serge | 624 | align 4 |
188 | serge | 625 | proc init_heap |
164 | serge | 626 | |
465 | serge | 627 | mov ebx,[current_slot] |
628 | mov eax, [ebx+APPDATA.heap_top] |
||
172 | serge | 629 | test eax, eax |
630 | jz @F |
||
465 | serge | 631 | sub eax,[ebx+APPDATA.heap_base] |
172 | serge | 632 | sub eax, 4096 |
633 | ret |
||
634 | @@: |
||
465 | serge | 635 | mov esi, [ebx+APPDATA.mem_size] |
188 | serge | 636 | add esi, 4095 |
637 | and esi, not 4095 |
||
465 | serge | 638 | mov [ebx+APPDATA.mem_size], esi |
188 | serge | 639 | mov eax, HEAP_TOP |
465 | serge | 640 | mov [ebx+APPDATA.heap_base], esi |
641 | mov [ebx+APPDATA.heap_top], eax |
||
164 | serge | 642 | |
188 | serge | 643 | sub eax, esi |
465 | serge | 644 | ; add esi, new_app_base |
188 | serge | 645 | shr esi, 10 |
646 | mov ecx, eax |
||
164 | serge | 647 | sub eax, 4096 |
188 | serge | 648 | or ecx, FREE_BLOCK |
365 | serge | 649 | mov [page_tabs+esi], ecx |
164 | serge | 650 | ret |
651 | .exit: |
||
652 | xor eax, eax |
||
653 | ret |
||
654 | endp |
||
655 | |||
656 | align 4 |
||
657 | proc user_alloc stdcall, alloc_size:dword |
||
658 | |||
659 | mov ecx, [alloc_size] |
||
660 | add ecx, (4095+4096) |
||
661 | and ecx, not 4095 |
||
662 | |||
465 | serge | 663 | mov ebx, [current_slot] |
664 | mov esi, dword [ebx+APPDATA.heap_base] ; heap_base |
||
665 | mov edi, dword [ebx+APPDATA.heap_top] ; heap_top |
||
164 | serge | 666 | l_0: |
667 | cmp esi, edi |
||
668 | jae m_exit |
||
669 | |||
670 | mov ebx, esi |
||
671 | shr ebx, 12 |
||
365 | serge | 672 | mov eax, [page_tabs+ebx*4] |
164 | serge | 673 | test eax, FREE_BLOCK |
674 | jz test_used |
||
675 | and eax, 0xFFFFF000 |
||
676 | cmp eax, ecx ;alloc_size |
||
677 | jb m_next |
||
270 | diamond | 678 | jz @f |
164 | serge | 679 | |
680 | mov edx, esi |
||
681 | add edx, ecx |
||
682 | sub eax, ecx; |
||
683 | or eax, FREE_BLOCK |
||
684 | shr edx, 12 |
||
365 | serge | 685 | mov [page_tabs+edx*4], eax |
294 | diamond | 686 | @@: |
164 | serge | 687 | or ecx, USED_BLOCK |
365 | serge | 688 | mov [page_tabs+ebx*4], ecx |
164 | serge | 689 | shr ecx, 12 |
690 | dec ecx |
||
691 | inc ebx |
||
692 | @@: |
||
365 | serge | 693 | mov dword [page_tabs+ebx*4], 2 |
164 | serge | 694 | inc ebx |
695 | dec ecx |
||
696 | jnz @B |
||
697 | |||
465 | serge | 698 | mov edx, [current_slot] |
699 | mov ebx, [alloc_size] |
||
700 | add ebx, 0xFFF |
||
701 | and ebx, not 0xFFF |
||
702 | add ebx, [edx+APPDATA.mem_size] |
||
703 | call update_mem_size |
||
294 | diamond | 704 | |
164 | serge | 705 | mov eax, esi |
706 | add eax, 4096 |
||
707 | ret |
||
708 | m_next: |
||
709 | add esi, eax |
||
710 | jmp l_0 |
||
711 | test_used: |
||
712 | test eax, USED_BLOCK |
||
713 | jz m_exit |
||
714 | |||
715 | and eax, 0xFFFFF000 |
||
716 | add esi, eax |
||
717 | jmp l_0 |
||
718 | m_exit: |
||
719 | xor eax, eax |
||
720 | ret |
||
721 | endp |
||
722 | |||
723 | align 4 |
||
724 | proc user_free stdcall, base:dword |
||
725 | |||
726 | mov esi, [base] |
||
727 | test esi, esi |
||
728 | jz .exit |
||
729 | |||
294 | diamond | 730 | xor ebx, ebx |
164 | serge | 731 | sub esi, 4096 |
732 | shr esi, 12 |
||
365 | serge | 733 | mov eax, [page_tabs+esi*4] |
546 | diamond | 734 | test al, USED_BLOCK |
188 | serge | 735 | jz .not_used |
546 | diamond | 736 | test al, DONT_FREE_BLOCK |
737 | jnz .cantfree |
||
164 | serge | 738 | |
739 | and eax, not 4095 |
||
740 | mov ecx, eax |
||
741 | or eax, FREE_BLOCK |
||
365 | serge | 742 | mov [page_tabs+esi*4], eax |
164 | serge | 743 | inc esi |
744 | sub ecx, 4096 |
||
745 | shr ecx, 12 |
||
294 | diamond | 746 | mov ebx, ecx |
164 | serge | 747 | .release: |
188 | serge | 748 | xor eax, eax |
365 | serge | 749 | xchg eax, [page_tabs+esi*4] |
188 | serge | 750 | test eax, 1 |
751 | jz @F |
||
164 | serge | 752 | call free_page |
448 | diamond | 753 | mov eax, esi |
754 | shl eax, 12 |
||
755 | invlpg [eax] |
||
188 | serge | 756 | @@: |
164 | serge | 757 | inc esi |
758 | dec ecx |
||
759 | jnz .release |
||
188 | serge | 760 | .not_used: |
465 | serge | 761 | mov edx, [current_slot] |
762 | mov esi, dword [edx+APPDATA.heap_base] |
||
763 | mov edi, dword [edx+APPDATA.heap_top] |
||
764 | sub ebx, [edx+APPDATA.mem_size] |
||
294 | diamond | 765 | neg ebx |
766 | call update_mem_size |
||
448 | diamond | 767 | call user_normalize |
768 | ret |
||
769 | .exit: |
||
770 | xor eax, eax |
||
771 | inc eax |
||
772 | ret |
||
546 | diamond | 773 | .cantfree: |
774 | xor eax, eax |
||
775 | ret |
||
448 | diamond | 776 | endp |
777 | |||
778 | user_normalize: |
||
779 | ; in: esi=heap_base, edi=heap_top |
||
780 | ; out: eax=0 <=> OK |
||
781 | ; destroys: ebx,edx,esi,edi |
||
164 | serge | 782 | shr esi, 12 |
783 | shr edi, 12 |
||
784 | @@: |
||
365 | serge | 785 | mov eax, [page_tabs+esi*4] |
164 | serge | 786 | test eax, USED_BLOCK |
787 | jz .test_free |
||
788 | shr eax, 12 |
||
789 | add esi, eax |
||
790 | jmp @B |
||
791 | .test_free: |
||
792 | test eax, FREE_BLOCK |
||
793 | jz .err |
||
794 | mov edx, eax |
||
795 | shr edx, 12 |
||
796 | add edx, esi |
||
797 | cmp edx, edi |
||
798 | jae .exit |
||
799 | |||
365 | serge | 800 | mov ebx, [page_tabs+edx*4] |
164 | serge | 801 | test ebx, USED_BLOCK |
802 | jz .next_free |
||
803 | |||
804 | shr ebx, 12 |
||
805 | add edx, ebx |
||
806 | mov esi, edx |
||
807 | jmp @B |
||
808 | .next_free: |
||
809 | test ebx, FREE_BLOCK |
||
810 | jz .err |
||
365 | serge | 811 | and dword [page_tabs+edx*4], 0 |
164 | serge | 812 | add eax, ebx |
813 | and eax, not 4095 |
||
814 | or eax, FREE_BLOCK |
||
365 | serge | 815 | mov [page_tabs+esi*4], eax |
164 | serge | 816 | jmp @B |
817 | .exit: |
||
818 | xor eax, eax |
||
819 | inc eax |
||
820 | ret |
||
821 | .err: |
||
822 | xor eax, eax |
||
823 | ret |
||
824 | |||
448 | diamond | 825 | user_realloc: |
826 | ; in: eax = pointer, ebx = new size |
||
827 | ; out: eax = new pointer or NULL |
||
828 | test eax, eax |
||
829 | jnz @f |
||
830 | ; realloc(NULL,sz) - same as malloc(sz) |
||
831 | push ebx |
||
832 | call user_alloc |
||
833 | ret |
||
834 | @@: |
||
835 | push ecx edx |
||
465 | serge | 836 | lea ecx, [eax - 0x1000] |
448 | diamond | 837 | shr ecx, 12 |
838 | mov edx, [page_tabs+ecx*4] |
||
839 | test edx, USED_BLOCK |
||
840 | jnz @f |
||
841 | ; attempt to realloc invalid pointer |
||
842 | .ret0: |
||
843 | pop edx ecx |
||
844 | xor eax, eax |
||
845 | ret |
||
846 | @@: |
||
546 | diamond | 847 | test edx, DONT_FREE_BLOCK |
848 | jnz .ret0 |
||
448 | diamond | 849 | add ebx, 0x1FFF |
850 | shr edx, 12 |
||
851 | shr ebx, 12 |
||
852 | ; edx = allocated size, ebx = new size |
||
853 | add edx, ecx |
||
854 | add ebx, ecx |
||
855 | cmp edx, ebx |
||
856 | jb .realloc_add |
||
857 | ; release part of allocated memory |
||
858 | .loop: |
||
859 | cmp edx, ebx |
||
860 | jz .release_done |
||
861 | dec edx |
||
862 | xor eax, eax |
||
863 | xchg eax, [page_tabs+edx*4] |
||
864 | test al, 1 |
||
865 | jz .loop |
||
866 | call free_page |
||
867 | mov eax, edx |
||
868 | shl eax, 12 |
||
869 | invlpg [eax] |
||
870 | jmp .loop |
||
871 | .release_done: |
||
872 | sub ebx, ecx |
||
873 | cmp ebx, 1 |
||
874 | jnz .nofreeall |
||
875 | mov eax, [page_tabs+ecx*4] |
||
876 | and eax, not 0xFFF |
||
465 | serge | 877 | mov edx, [current_slot] |
878 | mov ebx, [APPDATA.mem_size+edx] |
||
448 | diamond | 879 | sub ebx, eax |
880 | add ebx, 0x1000 |
||
881 | or al, FREE_BLOCK |
||
882 | mov [page_tabs+ecx*4], eax |
||
883 | push esi edi |
||
465 | serge | 884 | mov esi, [APPDATA.heap_base+edx] |
885 | mov edi, [APPDATA.heap_top+edx] |
||
448 | diamond | 886 | call update_mem_size |
887 | call user_normalize |
||
888 | pop edi esi |
||
889 | jmp .ret0 ; all freed |
||
890 | .nofreeall: |
||
891 | sub edx, ecx |
||
892 | shl ebx, 12 |
||
893 | or ebx, USED_BLOCK |
||
894 | xchg [page_tabs+ecx*4], ebx |
||
895 | shr ebx, 12 |
||
896 | sub ebx, edx |
||
897 | push ebx ecx edx |
||
465 | serge | 898 | mov edx, [current_slot] |
448 | diamond | 899 | shl ebx, 12 |
465 | serge | 900 | sub ebx, [APPDATA.mem_size+edx] |
448 | diamond | 901 | neg ebx |
902 | call update_mem_size |
||
903 | pop edx ecx ebx |
||
465 | serge | 904 | lea eax, [ecx+1] |
448 | diamond | 905 | shl eax, 12 |
906 | push eax |
||
907 | add ecx, ebx |
||
908 | add edx, ecx |
||
909 | shl ebx, 12 |
||
910 | jz .ret |
||
911 | push esi |
||
465 | serge | 912 | mov esi, [current_slot] |
913 | mov esi, [APPDATA.heap_top+esi] |
||
448 | diamond | 914 | shr esi, 12 |
915 | @@: |
||
916 | cmp edx, esi |
||
917 | jae .merge_done |
||
918 | mov eax, [page_tabs+edx*4] |
||
919 | test al, USED_BLOCK |
||
920 | jz .merge_done |
||
921 | and dword [page_tabs+edx*4], 0 |
||
922 | and eax, not 0xFFF |
||
923 | add ebx, eax |
||
924 | add edx, eax |
||
925 | jmp @b |
||
926 | .merge_done: |
||
927 | pop esi |
||
928 | or ebx, FREE_BLOCK |
||
929 | mov [page_tabs+ecx*4], ebx |
||
930 | .ret: |
||
931 | pop eax edx ecx |
||
932 | ret |
||
933 | .realloc_add: |
||
934 | ; get some additional memory |
||
465 | serge | 935 | mov eax, [current_slot] |
936 | mov eax, [APPDATA.heap_top+eax] |
||
448 | diamond | 937 | shr eax, 12 |
938 | cmp edx, eax |
||
939 | jae .cant_inplace |
||
940 | mov eax, [page_tabs+edx*4] |
||
941 | shr eax, 12 |
||
942 | add eax, edx |
||
943 | cmp eax, ebx |
||
944 | jb .cant_inplace |
||
945 | sub eax, ebx |
||
946 | jz @f |
||
947 | shl eax, 12 |
||
948 | or al, FREE_BLOCK |
||
949 | mov [page_tabs+ebx*4], eax |
||
950 | @@: |
||
951 | mov eax, ebx |
||
952 | sub eax, ecx |
||
953 | shl eax, 12 |
||
954 | or al, USED_BLOCK |
||
955 | mov [page_tabs+ecx*4], eax |
||
465 | serge | 956 | lea eax, [ecx+1] |
448 | diamond | 957 | shl eax, 12 |
958 | push eax |
||
959 | push edi |
||
960 | lea edi, [page_tabs+edx*4] |
||
961 | mov eax, 2 |
||
962 | sub ebx, edx |
||
963 | mov ecx, ebx |
||
964 | cld |
||
965 | rep stosd |
||
966 | pop edi |
||
465 | serge | 967 | mov edx, [current_slot] |
448 | diamond | 968 | shl ebx, 12 |
465 | serge | 969 | add ebx, [APPDATA.mem_size+edx] |
448 | diamond | 970 | call update_mem_size |
971 | pop eax edx ecx |
||
972 | ret |
||
973 | .cant_inplace: |
||
974 | push esi edi |
||
465 | serge | 975 | mov eax, [current_slot] |
976 | mov esi, [APPDATA.heap_base+eax] |
||
977 | mov edi, [APPDATA.heap_top+eax] |
||
448 | diamond | 978 | shr esi, 12 |
979 | shr edi, 12 |
||
980 | sub ebx, ecx |
||
981 | .find_place: |
||
982 | cmp esi, edi |
||
983 | jae .place_not_found |
||
984 | mov eax, [page_tabs+esi*4] |
||
985 | test al, FREE_BLOCK |
||
986 | jz .next_place |
||
987 | shr eax, 12 |
||
988 | cmp eax, ebx |
||
989 | jae .place_found |
||
990 | add esi, eax |
||
991 | jmp .find_place |
||
992 | .next_place: |
||
993 | shr eax, 12 |
||
994 | add esi, eax |
||
995 | jmp .find_place |
||
996 | .place_not_found: |
||
997 | pop edi esi |
||
998 | jmp .ret0 |
||
999 | .place_found: |
||
1000 | sub eax, ebx |
||
1001 | jz @f |
||
1002 | push esi |
||
1003 | add esi, eax |
||
1004 | shl eax, 12 |
||
1005 | or al, FREE_BLOCK |
||
1006 | mov [page_tabs+esi*4], eax |
||
1007 | pop esi |
||
1008 | @@: |
||
1009 | mov eax, ebx |
||
1010 | shl eax, 12 |
||
1011 | or al, USED_BLOCK |
||
1012 | mov [page_tabs+esi*4], eax |
||
1013 | inc esi |
||
1014 | mov eax, esi |
||
1015 | shl eax, 12 |
||
1016 | push eax |
||
1017 | mov eax, [page_tabs+ecx*4] |
||
1018 | and eax, not 0xFFF |
||
1019 | or al, FREE_BLOCK |
||
1020 | sub edx, ecx |
||
1021 | mov [page_tabs+ecx*4], eax |
||
1022 | inc ecx |
||
1023 | @@: |
||
1024 | xor eax, eax |
||
1025 | xchg eax, [page_tabs+ecx*4] |
||
1026 | mov [page_tabs+esi*4], eax |
||
1027 | mov eax, ecx |
||
1028 | shl eax, 12 |
||
1029 | invlpg [eax] |
||
1030 | inc ecx |
||
1031 | inc esi |
||
1032 | dec ebx |
||
1033 | dec edx |
||
1034 | jnz @b |
||
1035 | push ebx |
||
465 | serge | 1036 | mov edx, [current_slot] |
448 | diamond | 1037 | shl ebx, 12 |
465 | serge | 1038 | add ebx, [APPDATA.mem_size+edx] |
448 | diamond | 1039 | call update_mem_size |
1040 | pop ebx |
||
1041 | @@: |
||
1042 | mov dword [page_tabs+esi*4], 2 |
||
1043 | inc esi |
||
1044 | dec ebx |
||
1045 | jnz @b |
||
1046 | pop eax edi esi edx ecx |
||
1047 | ret |
||
1048 | |||
278 | serge | 1049 | if 0 |
164 | serge | 1050 | align 4 |
1051 | proc alloc_dll |
||
1052 | pushf |
||
1053 | cli |
||
1054 | bsf eax, [dll_map] |
||
1055 | jnz .find |
||
1056 | popf |
||
1057 | xor eax, eax |
||
1058 | ret |
||
1059 | .find: |
||
1060 | btr [dll_map], eax |
||
1061 | popf |
||
1062 | shl eax, 5 |
||
1063 | add eax, dll_tab |
||
1064 | ret |
||
1065 | endp |
||
1066 | |||
1067 | align 4 |
||
1068 | proc alloc_service |
||
1069 | pushf |
||
1070 | cli |
||
1071 | bsf eax, [srv_map] |
||
1072 | jnz .find |
||
1073 | popf |
||
1074 | xor eax, eax |
||
1075 | ret |
||
214 | serge | 1076 | .find: |
1077 | btr [srv_map], eax |
||
164 | serge | 1078 | popf |
214 | serge | 1079 | shl eax,0x02 |
1080 | lea eax,[srv_tab+eax+eax*8] ;srv_tab+eax*36 |
||
164 | serge | 1081 | ret |
1082 | endp |
||
278 | serge | 1083 | |
1084 | end if=> |