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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: 620 $ |
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 |
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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 |
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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 | endp |
||
652 | |||
653 | align 4 |
||
654 | proc user_alloc stdcall, alloc_size:dword |
||
655 | |||
656 | mov ecx, [alloc_size] |
||
657 | add ecx, (4095+4096) |
||
658 | and ecx, not 4095 |
||
659 | |||
465 | serge | 660 | mov ebx, [current_slot] |
661 | mov esi, dword [ebx+APPDATA.heap_base] ; heap_base |
||
662 | mov edi, dword [ebx+APPDATA.heap_top] ; heap_top |
||
164 | serge | 663 | l_0: |
664 | cmp esi, edi |
||
665 | jae m_exit |
||
666 | |||
667 | mov ebx, esi |
||
668 | shr ebx, 12 |
||
365 | serge | 669 | mov eax, [page_tabs+ebx*4] |
620 | diamond | 670 | test al, FREE_BLOCK |
164 | serge | 671 | jz test_used |
672 | and eax, 0xFFFFF000 |
||
673 | cmp eax, ecx ;alloc_size |
||
674 | jb m_next |
||
270 | diamond | 675 | jz @f |
164 | serge | 676 | |
620 | diamond | 677 | lea edx, [esi+ecx] |
678 | sub eax, ecx |
||
679 | or al, FREE_BLOCK |
||
164 | serge | 680 | shr edx, 12 |
365 | serge | 681 | mov [page_tabs+edx*4], eax |
294 | diamond | 682 | @@: |
164 | serge | 683 | or ecx, USED_BLOCK |
365 | serge | 684 | mov [page_tabs+ebx*4], ecx |
164 | serge | 685 | shr ecx, 12 |
620 | diamond | 686 | inc ebx |
164 | serge | 687 | dec ecx |
620 | diamond | 688 | jz .no |
164 | serge | 689 | @@: |
365 | serge | 690 | mov dword [page_tabs+ebx*4], 2 |
164 | serge | 691 | inc ebx |
692 | dec ecx |
||
693 | jnz @B |
||
620 | diamond | 694 | .no: |
164 | serge | 695 | |
465 | serge | 696 | mov edx, [current_slot] |
697 | mov ebx, [alloc_size] |
||
698 | add ebx, 0xFFF |
||
699 | and ebx, not 0xFFF |
||
700 | add ebx, [edx+APPDATA.mem_size] |
||
701 | call update_mem_size |
||
294 | diamond | 702 | |
620 | diamond | 703 | lea eax, [esi+4096] |
164 | serge | 704 | ret |
705 | test_used: |
||
620 | diamond | 706 | test al, USED_BLOCK |
164 | serge | 707 | jz m_exit |
708 | |||
709 | and eax, 0xFFFFF000 |
||
620 | diamond | 710 | m_next: |
164 | serge | 711 | add esi, eax |
712 | jmp l_0 |
||
713 | m_exit: |
||
714 | xor eax, eax |
||
715 | ret |
||
716 | endp |
||
717 | |||
718 | align 4 |
||
719 | proc user_free stdcall, base:dword |
||
720 | |||
721 | mov esi, [base] |
||
722 | test esi, esi |
||
723 | jz .exit |
||
724 | |||
294 | diamond | 725 | xor ebx, ebx |
164 | serge | 726 | shr esi, 12 |
620 | diamond | 727 | mov eax, [page_tabs+(esi-1)*4] |
546 | diamond | 728 | test al, USED_BLOCK |
620 | diamond | 729 | jz .cantfree |
546 | diamond | 730 | test al, DONT_FREE_BLOCK |
731 | jnz .cantfree |
||
164 | serge | 732 | |
733 | and eax, not 4095 |
||
734 | mov ecx, eax |
||
620 | diamond | 735 | or al, FREE_BLOCK |
736 | mov [page_tabs+(esi-1)*4], eax |
||
164 | serge | 737 | sub ecx, 4096 |
620 | diamond | 738 | mov ebx, ecx |
164 | serge | 739 | shr ecx, 12 |
620 | diamond | 740 | jz .released |
164 | serge | 741 | .release: |
188 | serge | 742 | xor eax, eax |
365 | serge | 743 | xchg eax, [page_tabs+esi*4] |
620 | diamond | 744 | test al, 1 |
188 | serge | 745 | jz @F |
164 | serge | 746 | call free_page |
448 | diamond | 747 | mov eax, esi |
748 | shl eax, 12 |
||
749 | invlpg [eax] |
||
188 | serge | 750 | @@: |
164 | serge | 751 | inc esi |
752 | dec ecx |
||
753 | jnz .release |
||
620 | diamond | 754 | .released: |
465 | serge | 755 | mov edx, [current_slot] |
756 | mov esi, dword [edx+APPDATA.heap_base] |
||
757 | mov edi, dword [edx+APPDATA.heap_top] |
||
758 | sub ebx, [edx+APPDATA.mem_size] |
||
294 | diamond | 759 | neg ebx |
760 | call update_mem_size |
||
448 | diamond | 761 | call user_normalize |
762 | ret |
||
763 | .exit: |
||
764 | xor eax, eax |
||
765 | inc eax |
||
766 | ret |
||
546 | diamond | 767 | .cantfree: |
768 | xor eax, eax |
||
769 | ret |
||
448 | diamond | 770 | endp |
771 | |||
772 | user_normalize: |
||
773 | ; in: esi=heap_base, edi=heap_top |
||
774 | ; out: eax=0 <=> OK |
||
775 | ; destroys: ebx,edx,esi,edi |
||
164 | serge | 776 | shr esi, 12 |
777 | shr edi, 12 |
||
778 | @@: |
||
365 | serge | 779 | mov eax, [page_tabs+esi*4] |
620 | diamond | 780 | test al, USED_BLOCK |
164 | serge | 781 | jz .test_free |
782 | shr eax, 12 |
||
783 | add esi, eax |
||
784 | jmp @B |
||
785 | .test_free: |
||
620 | diamond | 786 | test al, FREE_BLOCK |
164 | serge | 787 | jz .err |
788 | mov edx, eax |
||
789 | shr edx, 12 |
||
790 | add edx, esi |
||
791 | cmp edx, edi |
||
792 | jae .exit |
||
793 | |||
365 | serge | 794 | mov ebx, [page_tabs+edx*4] |
620 | diamond | 795 | test bl, USED_BLOCK |
164 | serge | 796 | jz .next_free |
797 | |||
798 | shr ebx, 12 |
||
799 | add edx, ebx |
||
800 | mov esi, edx |
||
801 | jmp @B |
||
802 | .next_free: |
||
620 | diamond | 803 | test bl, FREE_BLOCK |
164 | serge | 804 | jz .err |
365 | serge | 805 | and dword [page_tabs+edx*4], 0 |
164 | serge | 806 | add eax, ebx |
807 | and eax, not 4095 |
||
808 | or eax, FREE_BLOCK |
||
365 | serge | 809 | mov [page_tabs+esi*4], eax |
164 | serge | 810 | jmp @B |
811 | .exit: |
||
812 | xor eax, eax |
||
813 | inc eax |
||
814 | ret |
||
815 | .err: |
||
816 | xor eax, eax |
||
817 | ret |
||
818 | |||
448 | diamond | 819 | user_realloc: |
820 | ; in: eax = pointer, ebx = new size |
||
821 | ; out: eax = new pointer or NULL |
||
822 | test eax, eax |
||
823 | jnz @f |
||
824 | ; realloc(NULL,sz) - same as malloc(sz) |
||
825 | push ebx |
||
826 | call user_alloc |
||
827 | ret |
||
828 | @@: |
||
829 | push ecx edx |
||
465 | serge | 830 | lea ecx, [eax - 0x1000] |
448 | diamond | 831 | shr ecx, 12 |
832 | mov edx, [page_tabs+ecx*4] |
||
620 | diamond | 833 | test dl, USED_BLOCK |
448 | diamond | 834 | jnz @f |
835 | ; attempt to realloc invalid pointer |
||
836 | .ret0: |
||
837 | pop edx ecx |
||
838 | xor eax, eax |
||
839 | ret |
||
840 | @@: |
||
620 | diamond | 841 | test dl, DONT_FREE_BLOCK |
546 | diamond | 842 | jnz .ret0 |
448 | diamond | 843 | add ebx, 0x1FFF |
844 | shr edx, 12 |
||
845 | shr ebx, 12 |
||
846 | ; edx = allocated size, ebx = new size |
||
847 | add edx, ecx |
||
848 | add ebx, ecx |
||
849 | cmp edx, ebx |
||
850 | jb .realloc_add |
||
851 | ; release part of allocated memory |
||
852 | .loop: |
||
853 | cmp edx, ebx |
||
854 | jz .release_done |
||
855 | dec edx |
||
856 | xor eax, eax |
||
857 | xchg eax, [page_tabs+edx*4] |
||
858 | test al, 1 |
||
859 | jz .loop |
||
860 | call free_page |
||
861 | mov eax, edx |
||
862 | shl eax, 12 |
||
863 | invlpg [eax] |
||
864 | jmp .loop |
||
865 | .release_done: |
||
866 | sub ebx, ecx |
||
867 | cmp ebx, 1 |
||
868 | jnz .nofreeall |
||
869 | mov eax, [page_tabs+ecx*4] |
||
870 | and eax, not 0xFFF |
||
465 | serge | 871 | mov edx, [current_slot] |
872 | mov ebx, [APPDATA.mem_size+edx] |
||
448 | diamond | 873 | sub ebx, eax |
874 | add ebx, 0x1000 |
||
875 | or al, FREE_BLOCK |
||
876 | mov [page_tabs+ecx*4], eax |
||
877 | push esi edi |
||
465 | serge | 878 | mov esi, [APPDATA.heap_base+edx] |
879 | mov edi, [APPDATA.heap_top+edx] |
||
448 | diamond | 880 | call update_mem_size |
881 | call user_normalize |
||
882 | pop edi esi |
||
883 | jmp .ret0 ; all freed |
||
884 | .nofreeall: |
||
885 | sub edx, ecx |
||
886 | shl ebx, 12 |
||
887 | or ebx, USED_BLOCK |
||
888 | xchg [page_tabs+ecx*4], ebx |
||
889 | shr ebx, 12 |
||
890 | sub ebx, edx |
||
891 | push ebx ecx edx |
||
465 | serge | 892 | mov edx, [current_slot] |
448 | diamond | 893 | shl ebx, 12 |
465 | serge | 894 | sub ebx, [APPDATA.mem_size+edx] |
448 | diamond | 895 | neg ebx |
896 | call update_mem_size |
||
897 | pop edx ecx ebx |
||
465 | serge | 898 | lea eax, [ecx+1] |
448 | diamond | 899 | shl eax, 12 |
900 | push eax |
||
901 | add ecx, ebx |
||
902 | add edx, ecx |
||
903 | shl ebx, 12 |
||
904 | jz .ret |
||
905 | push esi |
||
465 | serge | 906 | mov esi, [current_slot] |
907 | mov esi, [APPDATA.heap_top+esi] |
||
448 | diamond | 908 | shr esi, 12 |
909 | @@: |
||
910 | cmp edx, esi |
||
911 | jae .merge_done |
||
912 | mov eax, [page_tabs+edx*4] |
||
913 | test al, USED_BLOCK |
||
914 | jz .merge_done |
||
915 | and dword [page_tabs+edx*4], 0 |
||
916 | and eax, not 0xFFF |
||
917 | add ebx, eax |
||
918 | add edx, eax |
||
919 | jmp @b |
||
920 | .merge_done: |
||
921 | pop esi |
||
922 | or ebx, FREE_BLOCK |
||
923 | mov [page_tabs+ecx*4], ebx |
||
924 | .ret: |
||
925 | pop eax edx ecx |
||
926 | ret |
||
927 | .realloc_add: |
||
928 | ; get some additional memory |
||
465 | serge | 929 | mov eax, [current_slot] |
930 | mov eax, [APPDATA.heap_top+eax] |
||
448 | diamond | 931 | shr eax, 12 |
932 | cmp edx, eax |
||
933 | jae .cant_inplace |
||
934 | mov eax, [page_tabs+edx*4] |
||
620 | diamond | 935 | test al, FREE_BLOCK |
936 | jz .cant_inplace |
||
448 | diamond | 937 | shr eax, 12 |
938 | add eax, edx |
||
620 | diamond | 939 | sub eax, ebx |
448 | diamond | 940 | jb .cant_inplace |
941 | jz @f |
||
942 | shl eax, 12 |
||
943 | or al, FREE_BLOCK |
||
944 | mov [page_tabs+ebx*4], eax |
||
945 | @@: |
||
946 | mov eax, ebx |
||
947 | sub eax, ecx |
||
948 | shl eax, 12 |
||
949 | or al, USED_BLOCK |
||
950 | mov [page_tabs+ecx*4], eax |
||
465 | serge | 951 | lea eax, [ecx+1] |
448 | diamond | 952 | shl eax, 12 |
953 | push eax |
||
954 | push edi |
||
955 | lea edi, [page_tabs+edx*4] |
||
956 | mov eax, 2 |
||
957 | sub ebx, edx |
||
958 | mov ecx, ebx |
||
959 | cld |
||
960 | rep stosd |
||
961 | pop edi |
||
465 | serge | 962 | mov edx, [current_slot] |
448 | diamond | 963 | shl ebx, 12 |
465 | serge | 964 | add ebx, [APPDATA.mem_size+edx] |
448 | diamond | 965 | call update_mem_size |
966 | pop eax edx ecx |
||
967 | ret |
||
968 | .cant_inplace: |
||
969 | push esi edi |
||
465 | serge | 970 | mov eax, [current_slot] |
971 | mov esi, [APPDATA.heap_base+eax] |
||
972 | mov edi, [APPDATA.heap_top+eax] |
||
448 | diamond | 973 | shr esi, 12 |
974 | shr edi, 12 |
||
975 | sub ebx, ecx |
||
976 | .find_place: |
||
977 | cmp esi, edi |
||
978 | jae .place_not_found |
||
979 | mov eax, [page_tabs+esi*4] |
||
980 | test al, FREE_BLOCK |
||
981 | jz .next_place |
||
982 | shr eax, 12 |
||
983 | cmp eax, ebx |
||
984 | jae .place_found |
||
985 | add esi, eax |
||
986 | jmp .find_place |
||
987 | .next_place: |
||
988 | shr eax, 12 |
||
989 | add esi, eax |
||
990 | jmp .find_place |
||
991 | .place_not_found: |
||
992 | pop edi esi |
||
993 | jmp .ret0 |
||
994 | .place_found: |
||
995 | sub eax, ebx |
||
996 | jz @f |
||
997 | push esi |
||
620 | diamond | 998 | add esi, ebx |
448 | diamond | 999 | shl eax, 12 |
1000 | or al, FREE_BLOCK |
||
1001 | mov [page_tabs+esi*4], eax |
||
1002 | pop esi |
||
1003 | @@: |
||
1004 | mov eax, ebx |
||
1005 | shl eax, 12 |
||
1006 | or al, USED_BLOCK |
||
1007 | mov [page_tabs+esi*4], eax |
||
1008 | inc esi |
||
1009 | mov eax, esi |
||
1010 | shl eax, 12 |
||
1011 | push eax |
||
1012 | mov eax, [page_tabs+ecx*4] |
||
1013 | and eax, not 0xFFF |
||
1014 | or al, FREE_BLOCK |
||
1015 | sub edx, ecx |
||
1016 | mov [page_tabs+ecx*4], eax |
||
1017 | inc ecx |
||
620 | diamond | 1018 | dec ebx |
1019 | dec edx |
||
1020 | jz .no |
||
448 | diamond | 1021 | @@: |
1022 | xor eax, eax |
||
1023 | xchg eax, [page_tabs+ecx*4] |
||
1024 | mov [page_tabs+esi*4], eax |
||
1025 | mov eax, ecx |
||
1026 | shl eax, 12 |
||
1027 | invlpg [eax] |
||
620 | diamond | 1028 | inc esi |
448 | diamond | 1029 | inc ecx |
1030 | dec ebx |
||
1031 | dec edx |
||
1032 | jnz @b |
||
620 | diamond | 1033 | .no: |
448 | diamond | 1034 | push ebx |
465 | serge | 1035 | mov edx, [current_slot] |
448 | diamond | 1036 | shl ebx, 12 |
465 | serge | 1037 | add ebx, [APPDATA.mem_size+edx] |
448 | diamond | 1038 | call update_mem_size |
1039 | pop ebx |
||
1040 | @@: |
||
1041 | mov dword [page_tabs+esi*4], 2 |
||
1042 | inc esi |
||
1043 | dec ebx |
||
1044 | jnz @b |
||
1045 | pop eax edi esi edx ecx |
||
1046 | ret |
||
1047 | |||
278 | serge | 1048 | if 0 |
164 | serge | 1049 | align 4 |
1050 | proc alloc_dll |
||
1051 | pushf |
||
1052 | cli |
||
1053 | bsf eax, [dll_map] |
||
1054 | jnz .find |
||
1055 | popf |
||
1056 | xor eax, eax |
||
1057 | ret |
||
1058 | .find: |
||
1059 | btr [dll_map], eax |
||
1060 | popf |
||
1061 | shl eax, 5 |
||
1062 | add eax, dll_tab |
||
1063 | ret |
||
1064 | endp |
||
1065 | |||
1066 | align 4 |
||
1067 | proc alloc_service |
||
1068 | pushf |
||
1069 | cli |
||
1070 | bsf eax, [srv_map] |
||
1071 | jnz .find |
||
1072 | popf |
||
1073 | xor eax, eax |
||
1074 | ret |
||
214 | serge | 1075 | .find: |
1076 | btr [srv_map], eax |
||
164 | serge | 1077 | popf |
214 | serge | 1078 | shl eax,0x02 |
1079 | lea eax,[srv_tab+eax+eax*8] ;srv_tab+eax*36 |
||
164 | serge | 1080 | ret |
1081 | endp |
||
278 | serge | 1082 | |
1083 | end if=> |