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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: 660 $ |
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 | |||
660 | serge | 272 | push ebx |
273 | push esi |
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274 | push edi |
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275 | |||
164 | serge | 276 | mov eax, [size] |
206 | serge | 277 | add eax, 4095 |
278 | and eax, not 4095 |
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164 | serge | 279 | mov [size], eax |
279 | serge | 280 | |
281 | mov ebx, heap_mutex |
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282 | call wait_mutex ;ebx |
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283 | |||
170 | serge | 284 | cmp eax, [heap_free] |
285 | ja .error |
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164 | serge | 286 | |
369 | serge | 287 | call get_block ; eax |
288 | test edi, edi |
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164 | serge | 289 | jz .error |
290 | |||
291 | cmp [edi+block_flags], FREE_BLOCK |
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292 | jne .error |
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293 | |||
294 | mov [block_ind], ebx ;index of allocated block |
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295 | |||
296 | mov eax, [edi+block_size] |
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297 | cmp eax, [size] |
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298 | je .m_eq_size |
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299 | |||
300 | call alloc_mem_block |
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301 | and eax, eax |
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302 | jz .error |
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303 | |||
304 | mov esi, eax ;esi - splitted block |
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305 | |||
306 | mov [esi+block_next], edi |
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307 | mov eax, [edi+block_prev] |
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308 | mov [esi+block_prev], eax |
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309 | mov [edi+block_prev], esi |
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357 | serge | 310 | mov [esi+list_fd], 0 |
311 | mov [esi+list_bk], 0 |
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164 | serge | 312 | and eax, eax |
313 | jz @f |
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314 | mov [eax+block_next], esi |
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315 | @@: |
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316 | mov ebx, [edi+block_base] |
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317 | mov [esi+block_base], ebx |
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318 | mov edx, [size] |
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319 | mov [esi+block_size], edx |
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320 | add [edi+block_base], edx |
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321 | sub [edi+block_size], edx |
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322 | |||
323 | mov eax, [edi+block_size] |
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324 | shr eax, 12 |
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325 | sub eax, 1 |
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326 | cmp eax, 63 |
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327 | jna @f |
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328 | mov eax, 63 |
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329 | @@: |
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330 | cmp eax, [block_ind] |
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331 | je .m_eq_ind |
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332 | |||
192 | serge | 333 | remove_from_list edi |
164 | serge | 334 | |
335 | mov ecx, [block_ind] |
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211 | serge | 336 | mov [mem_block_list+ecx*4], edx |
164 | serge | 337 | |
211 | serge | 338 | test edx, edx |
164 | serge | 339 | jnz @f |
340 | btr [mem_block_mask], ecx |
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341 | @@: |
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342 | mov edx, [mem_block_list+eax*4] |
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357 | serge | 343 | mov [edi+list_fd], edx |
164 | serge | 344 | test edx, edx |
345 | jz @f |
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357 | serge | 346 | mov [edx+list_bk], edi |
164 | serge | 347 | @@: |
348 | mov [mem_block_list+eax*4], edi |
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349 | bts [mem_block_mask], eax |
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350 | .m_eq_ind: |
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357 | serge | 351 | mov ecx, mem_used.fd-MEM_LIST_OFFSET |
352 | mov edx, [ecx+list_fd] |
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353 | mov [esi+list_fd], edx |
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354 | mov [esi+list_bk], ecx |
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355 | mov [ecx+list_fd], esi |
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356 | mov [edx+list_bk], esi |
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357 | |||
164 | serge | 358 | mov [esi+block_flags], USED_BLOCK |
359 | mov eax, [esi+block_base] |
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170 | serge | 360 | mov ebx, [size] |
361 | sub [heap_free], ebx |
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279 | serge | 362 | and [heap_mutex], 0 |
660 | serge | 363 | pop edi |
364 | pop esi |
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365 | pop ebx |
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164 | serge | 366 | ret |
367 | .m_eq_size: |
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368 | remove_from_list edi |
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192 | serge | 369 | mov [mem_block_list+ebx*4], edx |
164 | serge | 370 | and edx, edx |
371 | jnz @f |
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192 | serge | 372 | btr [mem_block_mask], ebx |
164 | serge | 373 | @@: |
357 | serge | 374 | mov ecx, mem_used.fd-MEM_LIST_OFFSET |
375 | mov edx, [ecx+list_fd] |
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376 | mov [edi+list_fd], edx |
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377 | mov [edi+list_bk], ecx |
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378 | mov [ecx+list_fd], edi |
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379 | mov [edx+list_bk], edi |
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380 | |||
164 | serge | 381 | mov [edi+block_flags], USED_BLOCK |
382 | mov eax, [edi+block_base] |
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170 | serge | 383 | mov ebx, [size] |
384 | sub [heap_free], ebx |
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279 | serge | 385 | and [heap_mutex], 0 |
660 | serge | 386 | pop edi |
387 | pop esi |
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388 | pop ebx |
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164 | serge | 389 | ret |
390 | .error: |
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391 | xor eax, eax |
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279 | serge | 392 | mov [heap_mutex], eax |
660 | serge | 393 | pop edi |
394 | pop esi |
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395 | pop ebx |
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164 | serge | 396 | ret |
397 | endp |
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398 | |||
399 | align 4 |
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321 | diamond | 400 | proc free_kernel_space stdcall uses ebx ecx edx esi edi, base:dword |
660 | serge | 401 | push ebx |
402 | push esi |
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403 | push edi |
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279 | serge | 404 | mov ebx, heap_mutex |
405 | call wait_mutex ;ebx |
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406 | |||
164 | serge | 407 | mov eax, [base] |
357 | serge | 408 | mov esi, [mem_used.fd] |
164 | serge | 409 | @@: |
357 | serge | 410 | cmp esi, mem_used.fd-MEM_LIST_OFFSET |
411 | je .fail |
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164 | serge | 412 | |
413 | cmp [esi+block_base], eax |
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414 | je .found |
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357 | serge | 415 | mov esi, [esi+list_fd] |
164 | serge | 416 | jmp @b |
417 | .found: |
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418 | cmp [esi+block_flags], USED_BLOCK |
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419 | jne .fail |
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420 | |||
170 | serge | 421 | mov eax, [esi+block_size] |
422 | add [heap_free], eax |
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423 | |||
164 | serge | 424 | mov edi, [esi+block_next] |
425 | test edi, edi |
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426 | jz .prev |
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427 | |||
428 | cmp [edi+block_flags], FREE_BLOCK |
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429 | jne .prev |
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430 | |||
431 | remove_from_free edi |
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432 | |||
433 | mov edx, [edi+block_next] |
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434 | mov [esi+block_next], edx |
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435 | test edx, edx |
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436 | jz @f |
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437 | |||
438 | mov [edx+block_prev], esi |
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439 | @@: |
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440 | mov ecx, [edi+block_size] |
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441 | add [esi+block_size], ecx |
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442 | |||
443 | mov eax, edi |
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444 | call free_mem_block |
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445 | .prev: |
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446 | mov edi, [esi+block_prev] |
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447 | test edi, edi |
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448 | jz .insert |
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449 | |||
450 | cmp [edi+block_flags], FREE_BLOCK |
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451 | jne .insert |
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452 | |||
453 | remove_from_used esi |
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454 | |||
455 | mov edx, [esi+block_next] |
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456 | mov [edi+block_next], edx |
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457 | test edx, edx |
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458 | jz @f |
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459 | mov [edx+block_prev], edi |
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460 | @@: |
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461 | mov eax, esi |
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462 | call free_mem_block |
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463 | |||
464 | mov ecx, [edi+block_size] |
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465 | mov eax, [esi+block_size] |
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466 | add eax, ecx |
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467 | mov [edi+block_size], eax |
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468 | |||
469 | calc_index eax |
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470 | calc_index ecx |
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471 | cmp eax, ecx |
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472 | je .m_eq |
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473 | |||
474 | push ecx |
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475 | remove_from_list edi |
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476 | pop ecx |
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477 | |||
478 | cmp [mem_block_list+ecx*4], edi |
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479 | jne @f |
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480 | mov [mem_block_list+ecx*4], edx |
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481 | @@: |
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482 | cmp [mem_block_list+ecx*4], 0 |
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483 | jne @f |
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484 | btr [mem_block_mask], ecx |
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485 | @@: |
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486 | mov esi, [mem_block_list+eax*4] |
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487 | mov [mem_block_list+eax*4], edi |
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357 | serge | 488 | mov [edi+list_fd], esi |
164 | serge | 489 | test esi, esi |
490 | jz @f |
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357 | serge | 491 | mov [esi+list_bk], edi |
164 | serge | 492 | @@: |
493 | bts [mem_block_mask], eax |
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494 | .m_eq: |
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495 | xor eax, eax |
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279 | serge | 496 | mov [heap_mutex], eax |
321 | diamond | 497 | dec eax |
660 | serge | 498 | pop edi |
499 | pop esi |
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500 | pop ebx |
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164 | serge | 501 | ret |
502 | .insert: |
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503 | remove_from_used esi |
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504 | |||
505 | mov eax, [esi+block_size] |
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506 | calc_index eax |
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507 | |||
508 | mov edi, [mem_block_list+eax*4] |
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509 | mov [mem_block_list+eax*4], esi |
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357 | serge | 510 | mov [esi+list_fd], edi |
164 | serge | 511 | test edi, edi |
512 | jz @f |
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357 | serge | 513 | mov [edi+list_bk], esi |
164 | serge | 514 | @@: |
515 | bts [mem_block_mask], eax |
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516 | mov [esi+block_flags],FREE_BLOCK |
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517 | xor eax, eax |
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279 | serge | 518 | mov [heap_mutex], eax |
321 | diamond | 519 | dec eax |
660 | serge | 520 | pop edi |
521 | pop esi |
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522 | pop ebx |
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164 | serge | 523 | ret |
524 | .fail: |
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525 | xor eax, eax |
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279 | serge | 526 | mov [heap_mutex], eax |
660 | serge | 527 | pop edi |
528 | pop esi |
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529 | pop ebx |
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164 | serge | 530 | ret |
531 | endp |
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532 | |||
533 | align 4 |
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534 | proc kernel_alloc stdcall, size:dword |
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535 | locals |
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536 | lin_addr dd ? |
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537 | pages_count dd ? |
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538 | endl |
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539 | |||
540 | mov eax, [size] |
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206 | serge | 541 | add eax, 4095 |
542 | and eax, not 4095; |
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164 | serge | 543 | mov [size], eax |
544 | and eax, eax |
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357 | serge | 545 | jz .err |
164 | serge | 546 | mov ebx, eax |
547 | shr ebx, 12 |
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548 | mov [pages_count], ebx |
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549 | |||
550 | stdcall alloc_kernel_space, eax |
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357 | serge | 551 | test eax, eax |
552 | jz .err |
||
164 | serge | 553 | mov [lin_addr], eax |
554 | |||
555 | mov ecx, [pages_count] |
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556 | mov edx, eax |
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557 | mov ebx, ecx |
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558 | |||
559 | shr ecx, 3 |
||
560 | jz .next |
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561 | |||
562 | and ebx, not 7 |
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563 | push ebx |
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564 | stdcall alloc_pages, ebx |
||
565 | pop ecx ; yes ecx!!! |
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566 | and eax, eax |
||
357 | serge | 567 | jz .err |
164 | serge | 568 | |
569 | mov edi, eax |
||
570 | mov edx, [lin_addr] |
||
571 | @@: |
||
572 | stdcall map_page,edx,edi,dword PG_SW |
||
573 | add edx, 0x1000 |
||
574 | add edi, 0x1000 |
||
575 | dec ecx |
||
576 | jnz @B |
||
577 | .next: |
||
578 | mov ecx, [pages_count] |
||
579 | and ecx, 7 |
||
580 | jz .end |
||
357 | serge | 581 | @@: |
582 | push ecx |
||
164 | serge | 583 | call alloc_page |
584 | pop ecx |
||
585 | test eax, eax |
||
357 | serge | 586 | jz .err |
164 | serge | 587 | |
588 | stdcall map_page,edx,eax,dword PG_SW |
||
589 | add edx, 0x1000 |
||
590 | dec ecx |
||
591 | jnz @B |
||
592 | .end: |
||
593 | mov eax, [lin_addr] |
||
594 | ret |
||
357 | serge | 595 | .err: |
164 | serge | 596 | xor eax, eax |
597 | ret |
||
598 | endp |
||
599 | |||
600 | align 4 |
||
601 | proc kernel_free stdcall, base:dword |
||
321 | diamond | 602 | push ebx esi |
164 | serge | 603 | |
279 | serge | 604 | mov ebx, heap_mutex |
605 | call wait_mutex ;ebx |
||
606 | |||
164 | serge | 607 | mov eax, [base] |
357 | serge | 608 | mov esi, [mem_used.fd] |
164 | serge | 609 | @@: |
357 | serge | 610 | cmp esi, mem_used.fd-MEM_LIST_OFFSET |
611 | je .fail |
||
164 | serge | 612 | |
613 | cmp [esi+block_base], eax |
||
614 | je .found |
||
357 | serge | 615 | mov esi, [esi+list_fd] |
164 | serge | 616 | jmp @b |
617 | .found: |
||
618 | cmp [esi+block_flags], USED_BLOCK |
||
619 | jne .fail |
||
620 | |||
279 | serge | 621 | and [heap_mutex], 0 |
622 | |||
321 | diamond | 623 | push ecx |
164 | serge | 624 | mov ecx, [esi+block_size]; |
281 | serge | 625 | shr ecx, 12 |
279 | serge | 626 | call release_pages ;eax, ecx |
321 | diamond | 627 | pop ecx |
164 | serge | 628 | stdcall free_kernel_space, [base] |
321 | diamond | 629 | pop esi ebx |
279 | serge | 630 | ret |
164 | serge | 631 | .fail: |
279 | serge | 632 | and [heap_mutex], 0 |
321 | diamond | 633 | pop esi ebx |
164 | serge | 634 | ret |
635 | endp |
||
636 | |||
637 | restore block_next |
||
638 | restore block_prev |
||
639 | restore block_list |
||
640 | restore block_base |
||
641 | restore block_size |
||
642 | restore block_flags |
||
643 | |||
644 | ;;;;;;;;;;;;;; USER ;;;;;;;;;;;;;;;;; |
||
645 | |||
188 | serge | 646 | HEAP_TOP equ 0x5FC00000 |
647 | |||
164 | serge | 648 | align 4 |
188 | serge | 649 | proc init_heap |
164 | serge | 650 | |
465 | serge | 651 | mov ebx,[current_slot] |
652 | mov eax, [ebx+APPDATA.heap_top] |
||
172 | serge | 653 | test eax, eax |
654 | jz @F |
||
465 | serge | 655 | sub eax,[ebx+APPDATA.heap_base] |
172 | serge | 656 | sub eax, 4096 |
657 | ret |
||
658 | @@: |
||
465 | serge | 659 | mov esi, [ebx+APPDATA.mem_size] |
188 | serge | 660 | add esi, 4095 |
661 | and esi, not 4095 |
||
465 | serge | 662 | mov [ebx+APPDATA.mem_size], esi |
188 | serge | 663 | mov eax, HEAP_TOP |
465 | serge | 664 | mov [ebx+APPDATA.heap_base], esi |
665 | mov [ebx+APPDATA.heap_top], eax |
||
164 | serge | 666 | |
188 | serge | 667 | sub eax, esi |
465 | serge | 668 | ; add esi, new_app_base |
188 | serge | 669 | shr esi, 10 |
670 | mov ecx, eax |
||
164 | serge | 671 | sub eax, 4096 |
188 | serge | 672 | or ecx, FREE_BLOCK |
365 | serge | 673 | mov [page_tabs+esi], ecx |
164 | serge | 674 | ret |
675 | endp |
||
676 | |||
677 | align 4 |
||
678 | proc user_alloc stdcall, alloc_size:dword |
||
679 | |||
680 | mov ecx, [alloc_size] |
||
681 | add ecx, (4095+4096) |
||
682 | and ecx, not 4095 |
||
683 | |||
465 | serge | 684 | mov ebx, [current_slot] |
685 | mov esi, dword [ebx+APPDATA.heap_base] ; heap_base |
||
686 | mov edi, dword [ebx+APPDATA.heap_top] ; heap_top |
||
164 | serge | 687 | l_0: |
688 | cmp esi, edi |
||
689 | jae m_exit |
||
690 | |||
691 | mov ebx, esi |
||
692 | shr ebx, 12 |
||
365 | serge | 693 | mov eax, [page_tabs+ebx*4] |
620 | diamond | 694 | test al, FREE_BLOCK |
164 | serge | 695 | jz test_used |
696 | and eax, 0xFFFFF000 |
||
697 | cmp eax, ecx ;alloc_size |
||
698 | jb m_next |
||
270 | diamond | 699 | jz @f |
164 | serge | 700 | |
620 | diamond | 701 | lea edx, [esi+ecx] |
702 | sub eax, ecx |
||
703 | or al, FREE_BLOCK |
||
164 | serge | 704 | shr edx, 12 |
365 | serge | 705 | mov [page_tabs+edx*4], eax |
294 | diamond | 706 | @@: |
164 | serge | 707 | or ecx, USED_BLOCK |
365 | serge | 708 | mov [page_tabs+ebx*4], ecx |
164 | serge | 709 | shr ecx, 12 |
620 | diamond | 710 | inc ebx |
164 | serge | 711 | dec ecx |
620 | diamond | 712 | jz .no |
164 | serge | 713 | @@: |
365 | serge | 714 | mov dword [page_tabs+ebx*4], 2 |
164 | serge | 715 | inc ebx |
716 | dec ecx |
||
717 | jnz @B |
||
620 | diamond | 718 | .no: |
164 | serge | 719 | |
465 | serge | 720 | mov edx, [current_slot] |
721 | mov ebx, [alloc_size] |
||
722 | add ebx, 0xFFF |
||
723 | and ebx, not 0xFFF |
||
724 | add ebx, [edx+APPDATA.mem_size] |
||
725 | call update_mem_size |
||
294 | diamond | 726 | |
620 | diamond | 727 | lea eax, [esi+4096] |
164 | serge | 728 | ret |
729 | test_used: |
||
620 | diamond | 730 | test al, USED_BLOCK |
164 | serge | 731 | jz m_exit |
732 | |||
733 | and eax, 0xFFFFF000 |
||
620 | diamond | 734 | m_next: |
164 | serge | 735 | add esi, eax |
736 | jmp l_0 |
||
737 | m_exit: |
||
738 | xor eax, eax |
||
739 | ret |
||
740 | endp |
||
741 | |||
742 | align 4 |
||
743 | proc user_free stdcall, base:dword |
||
744 | |||
745 | mov esi, [base] |
||
746 | test esi, esi |
||
747 | jz .exit |
||
748 | |||
294 | diamond | 749 | xor ebx, ebx |
164 | serge | 750 | shr esi, 12 |
620 | diamond | 751 | mov eax, [page_tabs+(esi-1)*4] |
546 | diamond | 752 | test al, USED_BLOCK |
620 | diamond | 753 | jz .cantfree |
546 | diamond | 754 | test al, DONT_FREE_BLOCK |
755 | jnz .cantfree |
||
164 | serge | 756 | |
757 | and eax, not 4095 |
||
758 | mov ecx, eax |
||
620 | diamond | 759 | or al, FREE_BLOCK |
760 | mov [page_tabs+(esi-1)*4], eax |
||
164 | serge | 761 | sub ecx, 4096 |
620 | diamond | 762 | mov ebx, ecx |
164 | serge | 763 | shr ecx, 12 |
620 | diamond | 764 | jz .released |
164 | serge | 765 | .release: |
188 | serge | 766 | xor eax, eax |
365 | serge | 767 | xchg eax, [page_tabs+esi*4] |
620 | diamond | 768 | test al, 1 |
188 | serge | 769 | jz @F |
164 | serge | 770 | call free_page |
448 | diamond | 771 | mov eax, esi |
772 | shl eax, 12 |
||
773 | invlpg [eax] |
||
188 | serge | 774 | @@: |
164 | serge | 775 | inc esi |
776 | dec ecx |
||
777 | jnz .release |
||
620 | diamond | 778 | .released: |
465 | serge | 779 | mov edx, [current_slot] |
780 | mov esi, dword [edx+APPDATA.heap_base] |
||
781 | mov edi, dword [edx+APPDATA.heap_top] |
||
782 | sub ebx, [edx+APPDATA.mem_size] |
||
294 | diamond | 783 | neg ebx |
784 | call update_mem_size |
||
448 | diamond | 785 | call user_normalize |
786 | ret |
||
787 | .exit: |
||
788 | xor eax, eax |
||
789 | inc eax |
||
790 | ret |
||
546 | diamond | 791 | .cantfree: |
792 | xor eax, eax |
||
793 | ret |
||
448 | diamond | 794 | endp |
795 | |||
796 | user_normalize: |
||
797 | ; in: esi=heap_base, edi=heap_top |
||
798 | ; out: eax=0 <=> OK |
||
799 | ; destroys: ebx,edx,esi,edi |
||
164 | serge | 800 | shr esi, 12 |
801 | shr edi, 12 |
||
802 | @@: |
||
365 | serge | 803 | mov eax, [page_tabs+esi*4] |
620 | diamond | 804 | test al, USED_BLOCK |
164 | serge | 805 | jz .test_free |
806 | shr eax, 12 |
||
807 | add esi, eax |
||
808 | jmp @B |
||
809 | .test_free: |
||
620 | diamond | 810 | test al, FREE_BLOCK |
164 | serge | 811 | jz .err |
812 | mov edx, eax |
||
813 | shr edx, 12 |
||
814 | add edx, esi |
||
815 | cmp edx, edi |
||
816 | jae .exit |
||
817 | |||
365 | serge | 818 | mov ebx, [page_tabs+edx*4] |
620 | diamond | 819 | test bl, USED_BLOCK |
164 | serge | 820 | jz .next_free |
821 | |||
822 | shr ebx, 12 |
||
823 | add edx, ebx |
||
824 | mov esi, edx |
||
825 | jmp @B |
||
826 | .next_free: |
||
620 | diamond | 827 | test bl, FREE_BLOCK |
164 | serge | 828 | jz .err |
365 | serge | 829 | and dword [page_tabs+edx*4], 0 |
164 | serge | 830 | add eax, ebx |
831 | and eax, not 4095 |
||
832 | or eax, FREE_BLOCK |
||
365 | serge | 833 | mov [page_tabs+esi*4], eax |
164 | serge | 834 | jmp @B |
835 | .exit: |
||
836 | xor eax, eax |
||
837 | inc eax |
||
838 | ret |
||
839 | .err: |
||
840 | xor eax, eax |
||
841 | ret |
||
842 | |||
448 | diamond | 843 | user_realloc: |
844 | ; in: eax = pointer, ebx = new size |
||
845 | ; out: eax = new pointer or NULL |
||
846 | test eax, eax |
||
847 | jnz @f |
||
848 | ; realloc(NULL,sz) - same as malloc(sz) |
||
849 | push ebx |
||
850 | call user_alloc |
||
851 | ret |
||
852 | @@: |
||
853 | push ecx edx |
||
465 | serge | 854 | lea ecx, [eax - 0x1000] |
448 | diamond | 855 | shr ecx, 12 |
856 | mov edx, [page_tabs+ecx*4] |
||
620 | diamond | 857 | test dl, USED_BLOCK |
448 | diamond | 858 | jnz @f |
859 | ; attempt to realloc invalid pointer |
||
860 | .ret0: |
||
861 | pop edx ecx |
||
862 | xor eax, eax |
||
863 | ret |
||
864 | @@: |
||
620 | diamond | 865 | test dl, DONT_FREE_BLOCK |
546 | diamond | 866 | jnz .ret0 |
448 | diamond | 867 | add ebx, 0x1FFF |
868 | shr edx, 12 |
||
869 | shr ebx, 12 |
||
870 | ; edx = allocated size, ebx = new size |
||
871 | add edx, ecx |
||
872 | add ebx, ecx |
||
873 | cmp edx, ebx |
||
874 | jb .realloc_add |
||
875 | ; release part of allocated memory |
||
876 | .loop: |
||
877 | cmp edx, ebx |
||
878 | jz .release_done |
||
879 | dec edx |
||
880 | xor eax, eax |
||
881 | xchg eax, [page_tabs+edx*4] |
||
882 | test al, 1 |
||
883 | jz .loop |
||
884 | call free_page |
||
885 | mov eax, edx |
||
886 | shl eax, 12 |
||
887 | invlpg [eax] |
||
888 | jmp .loop |
||
889 | .release_done: |
||
890 | sub ebx, ecx |
||
891 | cmp ebx, 1 |
||
892 | jnz .nofreeall |
||
893 | mov eax, [page_tabs+ecx*4] |
||
894 | and eax, not 0xFFF |
||
465 | serge | 895 | mov edx, [current_slot] |
896 | mov ebx, [APPDATA.mem_size+edx] |
||
448 | diamond | 897 | sub ebx, eax |
898 | add ebx, 0x1000 |
||
899 | or al, FREE_BLOCK |
||
900 | mov [page_tabs+ecx*4], eax |
||
901 | push esi edi |
||
465 | serge | 902 | mov esi, [APPDATA.heap_base+edx] |
903 | mov edi, [APPDATA.heap_top+edx] |
||
448 | diamond | 904 | call update_mem_size |
905 | call user_normalize |
||
906 | pop edi esi |
||
907 | jmp .ret0 ; all freed |
||
908 | .nofreeall: |
||
909 | sub edx, ecx |
||
910 | shl ebx, 12 |
||
911 | or ebx, USED_BLOCK |
||
912 | xchg [page_tabs+ecx*4], ebx |
||
913 | shr ebx, 12 |
||
914 | sub ebx, edx |
||
915 | push ebx ecx edx |
||
465 | serge | 916 | mov edx, [current_slot] |
448 | diamond | 917 | shl ebx, 12 |
465 | serge | 918 | sub ebx, [APPDATA.mem_size+edx] |
448 | diamond | 919 | neg ebx |
920 | call update_mem_size |
||
921 | pop edx ecx ebx |
||
465 | serge | 922 | lea eax, [ecx+1] |
448 | diamond | 923 | shl eax, 12 |
924 | push eax |
||
925 | add ecx, ebx |
||
926 | add edx, ecx |
||
927 | shl ebx, 12 |
||
928 | jz .ret |
||
929 | push esi |
||
465 | serge | 930 | mov esi, [current_slot] |
931 | mov esi, [APPDATA.heap_top+esi] |
||
448 | diamond | 932 | shr esi, 12 |
933 | @@: |
||
934 | cmp edx, esi |
||
935 | jae .merge_done |
||
936 | mov eax, [page_tabs+edx*4] |
||
937 | test al, USED_BLOCK |
||
938 | jz .merge_done |
||
939 | and dword [page_tabs+edx*4], 0 |
||
940 | and eax, not 0xFFF |
||
941 | add ebx, eax |
||
942 | add edx, eax |
||
943 | jmp @b |
||
944 | .merge_done: |
||
945 | pop esi |
||
946 | or ebx, FREE_BLOCK |
||
947 | mov [page_tabs+ecx*4], ebx |
||
948 | .ret: |
||
949 | pop eax edx ecx |
||
950 | ret |
||
951 | .realloc_add: |
||
952 | ; get some additional memory |
||
465 | serge | 953 | mov eax, [current_slot] |
954 | mov eax, [APPDATA.heap_top+eax] |
||
448 | diamond | 955 | shr eax, 12 |
956 | cmp edx, eax |
||
957 | jae .cant_inplace |
||
958 | mov eax, [page_tabs+edx*4] |
||
620 | diamond | 959 | test al, FREE_BLOCK |
960 | jz .cant_inplace |
||
448 | diamond | 961 | shr eax, 12 |
962 | add eax, edx |
||
620 | diamond | 963 | sub eax, ebx |
448 | diamond | 964 | jb .cant_inplace |
965 | jz @f |
||
966 | shl eax, 12 |
||
967 | or al, FREE_BLOCK |
||
968 | mov [page_tabs+ebx*4], eax |
||
969 | @@: |
||
970 | mov eax, ebx |
||
971 | sub eax, ecx |
||
972 | shl eax, 12 |
||
973 | or al, USED_BLOCK |
||
974 | mov [page_tabs+ecx*4], eax |
||
465 | serge | 975 | lea eax, [ecx+1] |
448 | diamond | 976 | shl eax, 12 |
977 | push eax |
||
978 | push edi |
||
979 | lea edi, [page_tabs+edx*4] |
||
980 | mov eax, 2 |
||
981 | sub ebx, edx |
||
982 | mov ecx, ebx |
||
983 | cld |
||
984 | rep stosd |
||
985 | pop edi |
||
465 | serge | 986 | mov edx, [current_slot] |
448 | diamond | 987 | shl ebx, 12 |
465 | serge | 988 | add ebx, [APPDATA.mem_size+edx] |
448 | diamond | 989 | call update_mem_size |
990 | pop eax edx ecx |
||
991 | ret |
||
992 | .cant_inplace: |
||
993 | push esi edi |
||
465 | serge | 994 | mov eax, [current_slot] |
995 | mov esi, [APPDATA.heap_base+eax] |
||
996 | mov edi, [APPDATA.heap_top+eax] |
||
448 | diamond | 997 | shr esi, 12 |
998 | shr edi, 12 |
||
999 | sub ebx, ecx |
||
1000 | .find_place: |
||
1001 | cmp esi, edi |
||
1002 | jae .place_not_found |
||
1003 | mov eax, [page_tabs+esi*4] |
||
1004 | test al, FREE_BLOCK |
||
1005 | jz .next_place |
||
1006 | shr eax, 12 |
||
1007 | cmp eax, ebx |
||
1008 | jae .place_found |
||
1009 | add esi, eax |
||
1010 | jmp .find_place |
||
1011 | .next_place: |
||
1012 | shr eax, 12 |
||
1013 | add esi, eax |
||
1014 | jmp .find_place |
||
1015 | .place_not_found: |
||
1016 | pop edi esi |
||
1017 | jmp .ret0 |
||
1018 | .place_found: |
||
1019 | sub eax, ebx |
||
1020 | jz @f |
||
1021 | push esi |
||
620 | diamond | 1022 | add esi, ebx |
448 | diamond | 1023 | shl eax, 12 |
1024 | or al, FREE_BLOCK |
||
1025 | mov [page_tabs+esi*4], eax |
||
1026 | pop esi |
||
1027 | @@: |
||
1028 | mov eax, ebx |
||
1029 | shl eax, 12 |
||
1030 | or al, USED_BLOCK |
||
1031 | mov [page_tabs+esi*4], eax |
||
1032 | inc esi |
||
1033 | mov eax, esi |
||
1034 | shl eax, 12 |
||
1035 | push eax |
||
1036 | mov eax, [page_tabs+ecx*4] |
||
1037 | and eax, not 0xFFF |
||
1038 | or al, FREE_BLOCK |
||
1039 | sub edx, ecx |
||
1040 | mov [page_tabs+ecx*4], eax |
||
1041 | inc ecx |
||
620 | diamond | 1042 | dec ebx |
1043 | dec edx |
||
1044 | jz .no |
||
448 | diamond | 1045 | @@: |
1046 | xor eax, eax |
||
1047 | xchg eax, [page_tabs+ecx*4] |
||
1048 | mov [page_tabs+esi*4], eax |
||
1049 | mov eax, ecx |
||
1050 | shl eax, 12 |
||
1051 | invlpg [eax] |
||
620 | diamond | 1052 | inc esi |
448 | diamond | 1053 | inc ecx |
1054 | dec ebx |
||
1055 | dec edx |
||
1056 | jnz @b |
||
620 | diamond | 1057 | .no: |
448 | diamond | 1058 | push ebx |
465 | serge | 1059 | mov edx, [current_slot] |
448 | diamond | 1060 | shl ebx, 12 |
465 | serge | 1061 | add ebx, [APPDATA.mem_size+edx] |
448 | diamond | 1062 | call update_mem_size |
1063 | pop ebx |
||
1064 | @@: |
||
1065 | mov dword [page_tabs+esi*4], 2 |
||
1066 | inc esi |
||
1067 | dec ebx |
||
1068 | jnz @b |
||
1069 | pop eax edi esi edx ecx |
||
1070 | ret |
||
1071 | |||
278 | serge | 1072 | if 0 |
164 | serge | 1073 | align 4 |
1074 | proc alloc_dll |
||
1075 | pushf |
||
1076 | cli |
||
1077 | bsf eax, [dll_map] |
||
1078 | jnz .find |
||
1079 | popf |
||
1080 | xor eax, eax |
||
1081 | ret |
||
1082 | .find: |
||
1083 | btr [dll_map], eax |
||
1084 | popf |
||
1085 | shl eax, 5 |
||
1086 | add eax, dll_tab |
||
1087 | ret |
||
1088 | endp |
||
1089 | |||
1090 | align 4 |
||
1091 | proc alloc_service |
||
1092 | pushf |
||
1093 | cli |
||
1094 | bsf eax, [srv_map] |
||
1095 | jnz .find |
||
1096 | popf |
||
1097 | xor eax, eax |
||
1098 | ret |
||
214 | serge | 1099 | .find: |
1100 | btr [srv_map], eax |
||
164 | serge | 1101 | popf |
214 | serge | 1102 | shl eax,0x02 |
1103 | lea eax,[srv_tab+eax+eax*8] ;srv_tab+eax*36 |
||
164 | serge | 1104 | ret |
1105 | endp |
||
278 | serge | 1106 | |
1107 | end if=> |