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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: 940 $ |
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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793 | serge | 142 | sub ecx, (HEAP_BASE - OS_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 |
819 | serge | 167 | get_small_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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819 | serge | 214 | alloc_mem_block: |
164 | serge | 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 |
819 | serge | 236 | align 4 |
237 | free_mem_block: |
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357 | serge | 238 | mov dword [eax], 0 |
239 | mov dword [eax+4], 0 |
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240 | mov dword [eax+8], 0 |
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241 | mov dword [eax+12], 0 |
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242 | mov dword [eax+16], 0 |
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243 | ; mov dword [eax+20], 0 |
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244 | mov dword [eax+24], 0 |
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245 | mov dword [eax+28], 0 |
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246 | |||
164 | serge | 247 | sub eax, [mem_block_arr] |
248 | shr eax, 5 |
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249 | |||
250 | mov ebx, mem_block_map |
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251 | bts [ebx], eax |
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170 | serge | 252 | inc [free_blocks] |
164 | serge | 253 | shr eax, 3 |
254 | and eax, not 3 |
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255 | add eax, ebx |
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256 | cmp [mem_block_start], eax |
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257 | ja @f |
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258 | ret |
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259 | @@: |
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260 | mov [mem_block_start], eax |
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261 | ret |
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262 | .err: |
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263 | xor eax, eax |
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264 | ret |
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265 | |||
266 | align 4 |
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267 | proc alloc_kernel_space stdcall, size:dword |
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268 | local block_ind:DWORD |
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269 | |||
660 | serge | 270 | push ebx |
271 | push esi |
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272 | push edi |
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273 | |||
164 | serge | 274 | mov eax, [size] |
206 | serge | 275 | add eax, 4095 |
276 | and eax, not 4095 |
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164 | serge | 277 | mov [size], eax |
279 | serge | 278 | |
279 | mov ebx, heap_mutex |
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280 | call wait_mutex ;ebx |
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281 | |||
170 | serge | 282 | cmp eax, [heap_free] |
283 | ja .error |
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164 | serge | 284 | |
819 | serge | 285 | call get_small_block ; eax |
369 | serge | 286 | test edi, edi |
164 | serge | 287 | jz .error |
288 | |||
289 | cmp [edi+block_flags], FREE_BLOCK |
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290 | jne .error |
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291 | |||
292 | mov [block_ind], ebx ;index of allocated block |
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293 | |||
294 | mov eax, [edi+block_size] |
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295 | cmp eax, [size] |
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296 | je .m_eq_size |
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297 | |||
298 | call alloc_mem_block |
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299 | and eax, eax |
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300 | jz .error |
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301 | |||
302 | mov esi, eax ;esi - splitted block |
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303 | |||
304 | mov [esi+block_next], edi |
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305 | mov eax, [edi+block_prev] |
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306 | mov [esi+block_prev], eax |
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307 | mov [edi+block_prev], esi |
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357 | serge | 308 | mov [esi+list_fd], 0 |
309 | mov [esi+list_bk], 0 |
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164 | serge | 310 | and eax, eax |
311 | jz @f |
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312 | mov [eax+block_next], esi |
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313 | @@: |
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314 | mov ebx, [edi+block_base] |
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315 | mov [esi+block_base], ebx |
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316 | mov edx, [size] |
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317 | mov [esi+block_size], edx |
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318 | add [edi+block_base], edx |
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319 | sub [edi+block_size], edx |
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320 | |||
321 | mov eax, [edi+block_size] |
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322 | shr eax, 12 |
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323 | sub eax, 1 |
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324 | cmp eax, 63 |
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325 | jna @f |
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326 | mov eax, 63 |
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327 | @@: |
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328 | cmp eax, [block_ind] |
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329 | je .m_eq_ind |
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330 | |||
192 | serge | 331 | remove_from_list edi |
164 | serge | 332 | |
333 | mov ecx, [block_ind] |
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211 | serge | 334 | mov [mem_block_list+ecx*4], edx |
164 | serge | 335 | |
211 | serge | 336 | test edx, edx |
164 | serge | 337 | jnz @f |
338 | btr [mem_block_mask], ecx |
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339 | @@: |
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340 | mov edx, [mem_block_list+eax*4] |
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357 | serge | 341 | mov [edi+list_fd], edx |
164 | serge | 342 | test edx, edx |
343 | jz @f |
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357 | serge | 344 | mov [edx+list_bk], edi |
164 | serge | 345 | @@: |
346 | mov [mem_block_list+eax*4], edi |
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347 | bts [mem_block_mask], eax |
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348 | .m_eq_ind: |
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357 | serge | 349 | mov ecx, mem_used.fd-MEM_LIST_OFFSET |
350 | mov edx, [ecx+list_fd] |
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351 | mov [esi+list_fd], edx |
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352 | mov [esi+list_bk], ecx |
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353 | mov [ecx+list_fd], esi |
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354 | mov [edx+list_bk], esi |
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355 | |||
164 | serge | 356 | mov [esi+block_flags], USED_BLOCK |
357 | mov eax, [esi+block_base] |
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170 | serge | 358 | mov ebx, [size] |
359 | sub [heap_free], ebx |
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279 | serge | 360 | and [heap_mutex], 0 |
660 | serge | 361 | pop edi |
362 | pop esi |
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363 | pop ebx |
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164 | serge | 364 | ret |
365 | .m_eq_size: |
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366 | remove_from_list edi |
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192 | serge | 367 | mov [mem_block_list+ebx*4], edx |
164 | serge | 368 | and edx, edx |
369 | jnz @f |
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192 | serge | 370 | btr [mem_block_mask], ebx |
164 | serge | 371 | @@: |
357 | serge | 372 | mov ecx, mem_used.fd-MEM_LIST_OFFSET |
373 | mov edx, [ecx+list_fd] |
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374 | mov [edi+list_fd], edx |
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375 | mov [edi+list_bk], ecx |
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376 | mov [ecx+list_fd], edi |
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377 | mov [edx+list_bk], edi |
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378 | |||
164 | serge | 379 | mov [edi+block_flags], USED_BLOCK |
380 | mov eax, [edi+block_base] |
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170 | serge | 381 | mov ebx, [size] |
382 | sub [heap_free], ebx |
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279 | serge | 383 | and [heap_mutex], 0 |
660 | serge | 384 | pop edi |
385 | pop esi |
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386 | pop ebx |
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164 | serge | 387 | ret |
388 | .error: |
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389 | xor eax, eax |
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279 | serge | 390 | mov [heap_mutex], eax |
660 | serge | 391 | pop edi |
392 | pop esi |
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393 | pop ebx |
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164 | serge | 394 | ret |
395 | endp |
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396 | |||
397 | align 4 |
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321 | diamond | 398 | proc free_kernel_space stdcall uses ebx ecx edx esi edi, base:dword |
660 | serge | 399 | push ebx |
400 | push esi |
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401 | push edi |
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279 | serge | 402 | mov ebx, heap_mutex |
403 | call wait_mutex ;ebx |
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404 | |||
164 | serge | 405 | mov eax, [base] |
357 | serge | 406 | mov esi, [mem_used.fd] |
164 | serge | 407 | @@: |
357 | serge | 408 | cmp esi, mem_used.fd-MEM_LIST_OFFSET |
409 | je .fail |
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164 | serge | 410 | |
411 | cmp [esi+block_base], eax |
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412 | je .found |
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357 | serge | 413 | mov esi, [esi+list_fd] |
164 | serge | 414 | jmp @b |
415 | .found: |
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416 | cmp [esi+block_flags], USED_BLOCK |
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417 | jne .fail |
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418 | |||
170 | serge | 419 | mov eax, [esi+block_size] |
420 | add [heap_free], eax |
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421 | |||
164 | serge | 422 | mov edi, [esi+block_next] |
423 | test edi, edi |
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424 | jz .prev |
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425 | |||
426 | cmp [edi+block_flags], FREE_BLOCK |
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427 | jne .prev |
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428 | |||
429 | remove_from_free edi |
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430 | |||
431 | mov edx, [edi+block_next] |
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432 | mov [esi+block_next], edx |
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433 | test edx, edx |
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434 | jz @f |
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435 | |||
436 | mov [edx+block_prev], esi |
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437 | @@: |
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438 | mov ecx, [edi+block_size] |
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439 | add [esi+block_size], ecx |
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440 | |||
441 | mov eax, edi |
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442 | call free_mem_block |
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443 | .prev: |
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444 | mov edi, [esi+block_prev] |
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445 | test edi, edi |
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446 | jz .insert |
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447 | |||
448 | cmp [edi+block_flags], FREE_BLOCK |
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449 | jne .insert |
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450 | |||
451 | remove_from_used esi |
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452 | |||
453 | mov edx, [esi+block_next] |
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454 | mov [edi+block_next], edx |
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455 | test edx, edx |
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456 | jz @f |
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457 | mov [edx+block_prev], edi |
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458 | @@: |
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459 | mov eax, esi |
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460 | call free_mem_block |
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461 | |||
462 | mov ecx, [edi+block_size] |
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463 | mov eax, [esi+block_size] |
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464 | add eax, ecx |
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465 | mov [edi+block_size], eax |
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466 | |||
467 | calc_index eax |
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468 | calc_index ecx |
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469 | cmp eax, ecx |
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470 | je .m_eq |
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471 | |||
472 | push ecx |
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473 | remove_from_list edi |
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474 | pop ecx |
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475 | |||
476 | cmp [mem_block_list+ecx*4], edi |
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477 | jne @f |
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478 | mov [mem_block_list+ecx*4], edx |
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479 | @@: |
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480 | cmp [mem_block_list+ecx*4], 0 |
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481 | jne @f |
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482 | btr [mem_block_mask], ecx |
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483 | @@: |
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484 | mov esi, [mem_block_list+eax*4] |
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485 | mov [mem_block_list+eax*4], edi |
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357 | serge | 486 | mov [edi+list_fd], esi |
164 | serge | 487 | test esi, esi |
488 | jz @f |
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357 | serge | 489 | mov [esi+list_bk], edi |
164 | serge | 490 | @@: |
491 | bts [mem_block_mask], eax |
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492 | .m_eq: |
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493 | xor eax, eax |
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279 | serge | 494 | mov [heap_mutex], eax |
321 | diamond | 495 | dec eax |
660 | serge | 496 | pop edi |
497 | pop esi |
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498 | pop ebx |
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164 | serge | 499 | ret |
500 | .insert: |
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501 | remove_from_used esi |
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502 | |||
503 | mov eax, [esi+block_size] |
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504 | calc_index eax |
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505 | |||
506 | mov edi, [mem_block_list+eax*4] |
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507 | mov [mem_block_list+eax*4], esi |
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357 | serge | 508 | mov [esi+list_fd], edi |
164 | serge | 509 | test edi, edi |
510 | jz @f |
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357 | serge | 511 | mov [edi+list_bk], esi |
164 | serge | 512 | @@: |
513 | bts [mem_block_mask], eax |
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514 | mov [esi+block_flags],FREE_BLOCK |
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515 | xor eax, eax |
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279 | serge | 516 | mov [heap_mutex], eax |
321 | diamond | 517 | dec eax |
660 | serge | 518 | pop edi |
519 | pop esi |
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520 | pop ebx |
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164 | serge | 521 | ret |
522 | .fail: |
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523 | xor eax, eax |
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279 | serge | 524 | mov [heap_mutex], eax |
660 | serge | 525 | pop edi |
526 | pop esi |
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527 | pop ebx |
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164 | serge | 528 | ret |
529 | endp |
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530 | |||
531 | align 4 |
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532 | proc kernel_alloc stdcall, size:dword |
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533 | locals |
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534 | lin_addr dd ? |
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535 | pages_count dd ? |
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536 | endl |
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537 | |||
662 | serge | 538 | push ebx |
539 | push edi |
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540 | |||
164 | serge | 541 | mov eax, [size] |
206 | serge | 542 | add eax, 4095 |
543 | and eax, not 4095; |
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164 | serge | 544 | mov [size], eax |
545 | and eax, eax |
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357 | serge | 546 | jz .err |
164 | serge | 547 | mov ebx, eax |
548 | shr ebx, 12 |
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549 | mov [pages_count], ebx |
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550 | |||
551 | stdcall alloc_kernel_space, eax |
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357 | serge | 552 | test eax, eax |
553 | jz .err |
||
164 | serge | 554 | mov [lin_addr], eax |
555 | |||
556 | mov ecx, [pages_count] |
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557 | mov edx, eax |
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558 | mov ebx, ecx |
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559 | |||
560 | shr ecx, 3 |
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561 | jz .next |
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562 | |||
563 | and ebx, not 7 |
||
564 | push ebx |
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565 | stdcall alloc_pages, ebx |
||
566 | pop ecx ; yes ecx!!! |
||
567 | and eax, eax |
||
357 | serge | 568 | jz .err |
164 | serge | 569 | |
570 | mov edi, eax |
||
571 | mov edx, [lin_addr] |
||
572 | @@: |
||
573 | stdcall map_page,edx,edi,dword PG_SW |
||
574 | add edx, 0x1000 |
||
575 | add edi, 0x1000 |
||
576 | dec ecx |
||
577 | jnz @B |
||
578 | .next: |
||
579 | mov ecx, [pages_count] |
||
580 | and ecx, 7 |
||
581 | jz .end |
||
357 | serge | 582 | @@: |
583 | push ecx |
||
164 | serge | 584 | call alloc_page |
585 | pop ecx |
||
586 | test eax, eax |
||
357 | serge | 587 | jz .err |
164 | serge | 588 | |
589 | stdcall map_page,edx,eax,dword PG_SW |
||
590 | add edx, 0x1000 |
||
591 | dec ecx |
||
592 | jnz @B |
||
593 | .end: |
||
594 | mov eax, [lin_addr] |
||
662 | serge | 595 | pop edi |
596 | pop ebx |
||
164 | serge | 597 | ret |
357 | serge | 598 | .err: |
164 | serge | 599 | xor eax, eax |
662 | serge | 600 | pop edi |
601 | pop ebx |
||
164 | serge | 602 | ret |
603 | endp |
||
604 | |||
605 | align 4 |
||
606 | proc kernel_free stdcall, base:dword |
||
321 | diamond | 607 | push ebx esi |
164 | serge | 608 | |
279 | serge | 609 | mov ebx, heap_mutex |
610 | call wait_mutex ;ebx |
||
611 | |||
164 | serge | 612 | mov eax, [base] |
357 | serge | 613 | mov esi, [mem_used.fd] |
164 | serge | 614 | @@: |
357 | serge | 615 | cmp esi, mem_used.fd-MEM_LIST_OFFSET |
616 | je .fail |
||
164 | serge | 617 | |
618 | cmp [esi+block_base], eax |
||
619 | je .found |
||
357 | serge | 620 | mov esi, [esi+list_fd] |
164 | serge | 621 | jmp @b |
622 | .found: |
||
623 | cmp [esi+block_flags], USED_BLOCK |
||
624 | jne .fail |
||
625 | |||
279 | serge | 626 | and [heap_mutex], 0 |
627 | |||
321 | diamond | 628 | push ecx |
164 | serge | 629 | mov ecx, [esi+block_size]; |
281 | serge | 630 | shr ecx, 12 |
279 | serge | 631 | call release_pages ;eax, ecx |
321 | diamond | 632 | pop ecx |
164 | serge | 633 | stdcall free_kernel_space, [base] |
321 | diamond | 634 | pop esi ebx |
279 | serge | 635 | ret |
164 | serge | 636 | .fail: |
279 | serge | 637 | and [heap_mutex], 0 |
321 | diamond | 638 | pop esi ebx |
164 | serge | 639 | ret |
640 | endp |
||
641 | |||
642 | restore block_next |
||
643 | restore block_prev |
||
644 | restore block_list |
||
645 | restore block_base |
||
646 | restore block_size |
||
647 | restore block_flags |
||
648 | |||
649 | ;;;;;;;;;;;;;; USER ;;;;;;;;;;;;;;;;; |
||
650 | |||
188 | serge | 651 | HEAP_TOP equ 0x5FC00000 |
652 | |||
164 | serge | 653 | align 4 |
188 | serge | 654 | proc init_heap |
164 | serge | 655 | |
465 | serge | 656 | mov ebx,[current_slot] |
657 | mov eax, [ebx+APPDATA.heap_top] |
||
172 | serge | 658 | test eax, eax |
659 | jz @F |
||
465 | serge | 660 | sub eax,[ebx+APPDATA.heap_base] |
172 | serge | 661 | sub eax, 4096 |
662 | ret |
||
663 | @@: |
||
465 | serge | 664 | mov esi, [ebx+APPDATA.mem_size] |
188 | serge | 665 | add esi, 4095 |
666 | and esi, not 4095 |
||
465 | serge | 667 | mov [ebx+APPDATA.mem_size], esi |
188 | serge | 668 | mov eax, HEAP_TOP |
465 | serge | 669 | mov [ebx+APPDATA.heap_base], esi |
670 | mov [ebx+APPDATA.heap_top], eax |
||
164 | serge | 671 | |
188 | serge | 672 | sub eax, esi |
673 | shr esi, 10 |
||
674 | mov ecx, eax |
||
164 | serge | 675 | sub eax, 4096 |
188 | serge | 676 | or ecx, FREE_BLOCK |
365 | serge | 677 | mov [page_tabs+esi], ecx |
164 | serge | 678 | ret |
679 | endp |
||
680 | |||
681 | align 4 |
||
682 | proc user_alloc stdcall, alloc_size:dword |
||
683 | |||
662 | serge | 684 | push ebx |
685 | push esi |
||
686 | push edi |
||
687 | |||
164 | serge | 688 | mov ecx, [alloc_size] |
689 | add ecx, (4095+4096) |
||
690 | and ecx, not 4095 |
||
691 | |||
465 | serge | 692 | mov ebx, [current_slot] |
693 | mov esi, dword [ebx+APPDATA.heap_base] ; heap_base |
||
694 | mov edi, dword [ebx+APPDATA.heap_top] ; heap_top |
||
164 | serge | 695 | l_0: |
696 | cmp esi, edi |
||
697 | jae m_exit |
||
698 | |||
699 | mov ebx, esi |
||
700 | shr ebx, 12 |
||
365 | serge | 701 | mov eax, [page_tabs+ebx*4] |
620 | diamond | 702 | test al, FREE_BLOCK |
164 | serge | 703 | jz test_used |
704 | and eax, 0xFFFFF000 |
||
705 | cmp eax, ecx ;alloc_size |
||
706 | jb m_next |
||
940 | serge | 707 | jz @f |
164 | serge | 708 | |
620 | diamond | 709 | lea edx, [esi+ecx] |
710 | sub eax, ecx |
||
711 | or al, FREE_BLOCK |
||
164 | serge | 712 | shr edx, 12 |
365 | serge | 713 | mov [page_tabs+edx*4], eax |
294 | diamond | 714 | @@: |
164 | serge | 715 | or ecx, USED_BLOCK |
365 | serge | 716 | mov [page_tabs+ebx*4], ecx |
164 | serge | 717 | shr ecx, 12 |
620 | diamond | 718 | inc ebx |
164 | serge | 719 | dec ecx |
620 | diamond | 720 | jz .no |
164 | serge | 721 | @@: |
365 | serge | 722 | mov dword [page_tabs+ebx*4], 2 |
164 | serge | 723 | inc ebx |
724 | dec ecx |
||
725 | jnz @B |
||
620 | diamond | 726 | .no: |
164 | serge | 727 | |
465 | serge | 728 | mov edx, [current_slot] |
729 | mov ebx, [alloc_size] |
||
730 | add ebx, 0xFFF |
||
731 | and ebx, not 0xFFF |
||
732 | add ebx, [edx+APPDATA.mem_size] |
||
733 | call update_mem_size |
||
294 | diamond | 734 | |
620 | diamond | 735 | lea eax, [esi+4096] |
662 | serge | 736 | |
737 | pop edi |
||
738 | pop esi |
||
739 | pop ebx |
||
164 | serge | 740 | ret |
741 | test_used: |
||
620 | diamond | 742 | test al, USED_BLOCK |
164 | serge | 743 | jz m_exit |
744 | |||
745 | and eax, 0xFFFFF000 |
||
620 | diamond | 746 | m_next: |
164 | serge | 747 | add esi, eax |
748 | jmp l_0 |
||
749 | m_exit: |
||
750 | xor eax, eax |
||
662 | serge | 751 | pop edi |
752 | pop esi |
||
753 | pop ebx |
||
164 | serge | 754 | ret |
755 | endp |
||
756 | |||
757 | align 4 |
||
758 | proc user_free stdcall, base:dword |
||
759 | |||
662 | serge | 760 | push esi |
761 | |||
164 | serge | 762 | mov esi, [base] |
763 | test esi, esi |
||
764 | jz .exit |
||
765 | |||
662 | serge | 766 | push ebx |
767 | |||
294 | diamond | 768 | xor ebx, ebx |
164 | serge | 769 | shr esi, 12 |
620 | diamond | 770 | mov eax, [page_tabs+(esi-1)*4] |
546 | diamond | 771 | test al, USED_BLOCK |
620 | diamond | 772 | jz .cantfree |
546 | diamond | 773 | test al, DONT_FREE_BLOCK |
774 | jnz .cantfree |
||
164 | serge | 775 | |
776 | and eax, not 4095 |
||
777 | mov ecx, eax |
||
620 | diamond | 778 | or al, FREE_BLOCK |
779 | mov [page_tabs+(esi-1)*4], eax |
||
164 | serge | 780 | sub ecx, 4096 |
620 | diamond | 781 | mov ebx, ecx |
164 | serge | 782 | shr ecx, 12 |
620 | diamond | 783 | jz .released |
164 | serge | 784 | .release: |
188 | serge | 785 | xor eax, eax |
365 | serge | 786 | xchg eax, [page_tabs+esi*4] |
620 | diamond | 787 | test al, 1 |
188 | serge | 788 | jz @F |
940 | serge | 789 | test eax, PG_SHARED |
790 | jnz @F |
||
164 | serge | 791 | call free_page |
448 | diamond | 792 | mov eax, esi |
793 | shl eax, 12 |
||
794 | invlpg [eax] |
||
188 | serge | 795 | @@: |
164 | serge | 796 | inc esi |
797 | dec ecx |
||
798 | jnz .release |
||
620 | diamond | 799 | .released: |
662 | serge | 800 | push edi |
801 | |||
465 | serge | 802 | mov edx, [current_slot] |
803 | mov esi, dword [edx+APPDATA.heap_base] |
||
804 | mov edi, dword [edx+APPDATA.heap_top] |
||
805 | sub ebx, [edx+APPDATA.mem_size] |
||
294 | diamond | 806 | neg ebx |
807 | call update_mem_size |
||
448 | diamond | 808 | call user_normalize |
662 | serge | 809 | pop edi |
810 | pop ebx |
||
811 | pop esi |
||
448 | diamond | 812 | ret |
813 | .exit: |
||
814 | xor eax, eax |
||
815 | inc eax |
||
662 | serge | 816 | pop esi |
448 | diamond | 817 | ret |
546 | diamond | 818 | .cantfree: |
819 | xor eax, eax |
||
662 | serge | 820 | pop ebx |
821 | pop esi |
||
546 | diamond | 822 | ret |
448 | diamond | 823 | endp |
824 | |||
825 | user_normalize: |
||
826 | ; in: esi=heap_base, edi=heap_top |
||
827 | ; out: eax=0 <=> OK |
||
828 | ; destroys: ebx,edx,esi,edi |
||
164 | serge | 829 | shr esi, 12 |
830 | shr edi, 12 |
||
831 | @@: |
||
365 | serge | 832 | mov eax, [page_tabs+esi*4] |
620 | diamond | 833 | test al, USED_BLOCK |
164 | serge | 834 | jz .test_free |
835 | shr eax, 12 |
||
836 | add esi, eax |
||
837 | jmp @B |
||
838 | .test_free: |
||
620 | diamond | 839 | test al, FREE_BLOCK |
164 | serge | 840 | jz .err |
841 | mov edx, eax |
||
842 | shr edx, 12 |
||
843 | add edx, esi |
||
844 | cmp edx, edi |
||
845 | jae .exit |
||
846 | |||
365 | serge | 847 | mov ebx, [page_tabs+edx*4] |
620 | diamond | 848 | test bl, USED_BLOCK |
164 | serge | 849 | jz .next_free |
850 | |||
851 | shr ebx, 12 |
||
852 | add edx, ebx |
||
853 | mov esi, edx |
||
854 | jmp @B |
||
855 | .next_free: |
||
620 | diamond | 856 | test bl, FREE_BLOCK |
164 | serge | 857 | jz .err |
365 | serge | 858 | and dword [page_tabs+edx*4], 0 |
164 | serge | 859 | add eax, ebx |
860 | and eax, not 4095 |
||
861 | or eax, FREE_BLOCK |
||
365 | serge | 862 | mov [page_tabs+esi*4], eax |
164 | serge | 863 | jmp @B |
864 | .exit: |
||
865 | xor eax, eax |
||
866 | inc eax |
||
867 | ret |
||
868 | .err: |
||
869 | xor eax, eax |
||
870 | ret |
||
871 | |||
448 | diamond | 872 | user_realloc: |
873 | ; in: eax = pointer, ebx = new size |
||
874 | ; out: eax = new pointer or NULL |
||
875 | test eax, eax |
||
876 | jnz @f |
||
877 | ; realloc(NULL,sz) - same as malloc(sz) |
||
878 | push ebx |
||
879 | call user_alloc |
||
880 | ret |
||
881 | @@: |
||
882 | push ecx edx |
||
465 | serge | 883 | lea ecx, [eax - 0x1000] |
448 | diamond | 884 | shr ecx, 12 |
885 | mov edx, [page_tabs+ecx*4] |
||
620 | diamond | 886 | test dl, USED_BLOCK |
448 | diamond | 887 | jnz @f |
888 | ; attempt to realloc invalid pointer |
||
889 | .ret0: |
||
890 | pop edx ecx |
||
891 | xor eax, eax |
||
892 | ret |
||
893 | @@: |
||
620 | diamond | 894 | test dl, DONT_FREE_BLOCK |
546 | diamond | 895 | jnz .ret0 |
448 | diamond | 896 | add ebx, 0x1FFF |
897 | shr edx, 12 |
||
898 | shr ebx, 12 |
||
899 | ; edx = allocated size, ebx = new size |
||
900 | add edx, ecx |
||
901 | add ebx, ecx |
||
902 | cmp edx, ebx |
||
903 | jb .realloc_add |
||
904 | ; release part of allocated memory |
||
905 | .loop: |
||
906 | cmp edx, ebx |
||
907 | jz .release_done |
||
908 | dec edx |
||
909 | xor eax, eax |
||
910 | xchg eax, [page_tabs+edx*4] |
||
911 | test al, 1 |
||
912 | jz .loop |
||
913 | call free_page |
||
914 | mov eax, edx |
||
915 | shl eax, 12 |
||
916 | invlpg [eax] |
||
917 | jmp .loop |
||
918 | .release_done: |
||
919 | sub ebx, ecx |
||
920 | cmp ebx, 1 |
||
921 | jnz .nofreeall |
||
922 | mov eax, [page_tabs+ecx*4] |
||
923 | and eax, not 0xFFF |
||
465 | serge | 924 | mov edx, [current_slot] |
925 | mov ebx, [APPDATA.mem_size+edx] |
||
448 | diamond | 926 | sub ebx, eax |
927 | add ebx, 0x1000 |
||
928 | or al, FREE_BLOCK |
||
929 | mov [page_tabs+ecx*4], eax |
||
930 | push esi edi |
||
465 | serge | 931 | mov esi, [APPDATA.heap_base+edx] |
932 | mov edi, [APPDATA.heap_top+edx] |
||
448 | diamond | 933 | call update_mem_size |
934 | call user_normalize |
||
935 | pop edi esi |
||
936 | jmp .ret0 ; all freed |
||
937 | .nofreeall: |
||
938 | sub edx, ecx |
||
939 | shl ebx, 12 |
||
940 | or ebx, USED_BLOCK |
||
941 | xchg [page_tabs+ecx*4], ebx |
||
942 | shr ebx, 12 |
||
943 | sub ebx, edx |
||
944 | push ebx ecx edx |
||
465 | serge | 945 | mov edx, [current_slot] |
448 | diamond | 946 | shl ebx, 12 |
465 | serge | 947 | sub ebx, [APPDATA.mem_size+edx] |
448 | diamond | 948 | neg ebx |
949 | call update_mem_size |
||
950 | pop edx ecx ebx |
||
465 | serge | 951 | lea eax, [ecx+1] |
448 | diamond | 952 | shl eax, 12 |
953 | push eax |
||
823 | diamond | 954 | add ecx, edx |
955 | lea edx, [ecx+ebx] |
||
448 | diamond | 956 | shl ebx, 12 |
957 | jz .ret |
||
958 | push esi |
||
465 | serge | 959 | mov esi, [current_slot] |
960 | mov esi, [APPDATA.heap_top+esi] |
||
448 | diamond | 961 | shr esi, 12 |
962 | @@: |
||
963 | cmp edx, esi |
||
964 | jae .merge_done |
||
965 | mov eax, [page_tabs+edx*4] |
||
966 | test al, USED_BLOCK |
||
823 | diamond | 967 | jnz .merge_done |
448 | diamond | 968 | and dword [page_tabs+edx*4], 0 |
823 | diamond | 969 | shr eax, 12 |
970 | add edx, eax |
||
971 | shl eax, 12 |
||
448 | diamond | 972 | add ebx, eax |
973 | jmp @b |
||
974 | .merge_done: |
||
975 | pop esi |
||
976 | or ebx, FREE_BLOCK |
||
977 | mov [page_tabs+ecx*4], ebx |
||
978 | .ret: |
||
979 | pop eax edx ecx |
||
980 | ret |
||
981 | .realloc_add: |
||
982 | ; get some additional memory |
||
465 | serge | 983 | mov eax, [current_slot] |
984 | mov eax, [APPDATA.heap_top+eax] |
||
448 | diamond | 985 | shr eax, 12 |
986 | cmp edx, eax |
||
987 | jae .cant_inplace |
||
988 | mov eax, [page_tabs+edx*4] |
||
620 | diamond | 989 | test al, FREE_BLOCK |
990 | jz .cant_inplace |
||
448 | diamond | 991 | shr eax, 12 |
992 | add eax, edx |
||
620 | diamond | 993 | sub eax, ebx |
448 | diamond | 994 | jb .cant_inplace |
995 | jz @f |
||
996 | shl eax, 12 |
||
997 | or al, FREE_BLOCK |
||
998 | mov [page_tabs+ebx*4], eax |
||
999 | @@: |
||
1000 | mov eax, ebx |
||
1001 | sub eax, ecx |
||
1002 | shl eax, 12 |
||
1003 | or al, USED_BLOCK |
||
1004 | mov [page_tabs+ecx*4], eax |
||
465 | serge | 1005 | lea eax, [ecx+1] |
448 | diamond | 1006 | shl eax, 12 |
1007 | push eax |
||
1008 | push edi |
||
1009 | lea edi, [page_tabs+edx*4] |
||
1010 | mov eax, 2 |
||
1011 | sub ebx, edx |
||
1012 | mov ecx, ebx |
||
1013 | cld |
||
1014 | rep stosd |
||
1015 | pop edi |
||
465 | serge | 1016 | mov edx, [current_slot] |
448 | diamond | 1017 | shl ebx, 12 |
465 | serge | 1018 | add ebx, [APPDATA.mem_size+edx] |
448 | diamond | 1019 | call update_mem_size |
1020 | pop eax edx ecx |
||
1021 | ret |
||
1022 | .cant_inplace: |
||
1023 | push esi edi |
||
465 | serge | 1024 | mov eax, [current_slot] |
1025 | mov esi, [APPDATA.heap_base+eax] |
||
1026 | mov edi, [APPDATA.heap_top+eax] |
||
448 | diamond | 1027 | shr esi, 12 |
1028 | shr edi, 12 |
||
1029 | sub ebx, ecx |
||
1030 | .find_place: |
||
1031 | cmp esi, edi |
||
1032 | jae .place_not_found |
||
1033 | mov eax, [page_tabs+esi*4] |
||
1034 | test al, FREE_BLOCK |
||
1035 | jz .next_place |
||
1036 | shr eax, 12 |
||
1037 | cmp eax, ebx |
||
1038 | jae .place_found |
||
1039 | add esi, eax |
||
1040 | jmp .find_place |
||
1041 | .next_place: |
||
1042 | shr eax, 12 |
||
1043 | add esi, eax |
||
1044 | jmp .find_place |
||
1045 | .place_not_found: |
||
1046 | pop edi esi |
||
1047 | jmp .ret0 |
||
1048 | .place_found: |
||
1049 | sub eax, ebx |
||
1050 | jz @f |
||
1051 | push esi |
||
620 | diamond | 1052 | add esi, ebx |
448 | diamond | 1053 | shl eax, 12 |
1054 | or al, FREE_BLOCK |
||
1055 | mov [page_tabs+esi*4], eax |
||
1056 | pop esi |
||
1057 | @@: |
||
1058 | mov eax, ebx |
||
1059 | shl eax, 12 |
||
1060 | or al, USED_BLOCK |
||
1061 | mov [page_tabs+esi*4], eax |
||
1062 | inc esi |
||
1063 | mov eax, esi |
||
1064 | shl eax, 12 |
||
1065 | push eax |
||
1066 | mov eax, [page_tabs+ecx*4] |
||
1067 | and eax, not 0xFFF |
||
1068 | or al, FREE_BLOCK |
||
1069 | sub edx, ecx |
||
1070 | mov [page_tabs+ecx*4], eax |
||
1071 | inc ecx |
||
620 | diamond | 1072 | dec ebx |
1073 | dec edx |
||
1074 | jz .no |
||
448 | diamond | 1075 | @@: |
1076 | xor eax, eax |
||
1077 | xchg eax, [page_tabs+ecx*4] |
||
1078 | mov [page_tabs+esi*4], eax |
||
940 | serge | 1079 | mov eax, ecx |
1080 | shl eax, 12 |
||
1081 | invlpg [eax] |
||
620 | diamond | 1082 | inc esi |
448 | diamond | 1083 | inc ecx |
1084 | dec ebx |
||
1085 | dec edx |
||
1086 | jnz @b |
||
620 | diamond | 1087 | .no: |
448 | diamond | 1088 | push ebx |
465 | serge | 1089 | mov edx, [current_slot] |
448 | diamond | 1090 | shl ebx, 12 |
465 | serge | 1091 | add ebx, [APPDATA.mem_size+edx] |
448 | diamond | 1092 | call update_mem_size |
1093 | pop ebx |
||
1094 | @@: |
||
1095 | mov dword [page_tabs+esi*4], 2 |
||
1096 | inc esi |
||
1097 | dec ebx |
||
1098 | jnz @b |
||
1099 | pop eax edi esi edx ecx |
||
1100 | ret |
||
1101 | |||
278 | serge | 1102 | if 0 |
164 | serge | 1103 | align 4 |
1104 | proc alloc_dll |
||
1105 | pushf |
||
1106 | cli |
||
1107 | bsf eax, [dll_map] |
||
1108 | jnz .find |
||
1109 | popf |
||
1110 | xor eax, eax |
||
1111 | ret |
||
1112 | .find: |
||
1113 | btr [dll_map], eax |
||
1114 | popf |
||
1115 | shl eax, 5 |
||
1116 | add eax, dll_tab |
||
1117 | ret |
||
1118 | endp |
||
1119 | |||
1120 | align 4 |
||
1121 | proc alloc_service |
||
1122 | pushf |
||
1123 | cli |
||
1124 | bsf eax, [srv_map] |
||
1125 | jnz .find |
||
1126 | popf |
||
1127 | xor eax, eax |
||
1128 | ret |
||
214 | serge | 1129 | .find: |
1130 | btr [srv_map], eax |
||
164 | serge | 1131 | popf |
214 | serge | 1132 | shl eax,0x02 |
1133 | lea eax,[srv_tab+eax+eax*8] ;srv_tab+eax*36 |
||
164 | serge | 1134 | ret |
1135 | endp |
||
278 | serge | 1136 | |
1137 | end if |
||
940 | serge | 1138 | |
1139 | |||
1140 | ;;;;;;;;;;;;;; SHARED ;;;;;;;;;;;;;;;;; |
||
1141 | |||
1142 | |||
1143 | ; param |
||
1144 | ; eax= shm_map object |
||
1145 | |||
1146 | align 4 |
||
1147 | destroy_smap: |
||
1148 | |||
1149 | pushfd |
||
1150 | cli |
||
1151 | |||
1152 | push ebx |
||
1153 | mov ebx, eax |
||
1154 | |||
1155 | mov eax, [eax+SHMAP.base] |
||
1156 | test eax, eax |
||
1157 | jz @F |
||
1158 | |||
1159 | stdcall user_free, eax |
||
1160 | @@: |
||
1161 | mov eax, [ebx+SHMAP.parent] |
||
1162 | test eax, eax |
||
1163 | jz @F |
||
1164 | |||
1165 | lock dec [eax+SHMEM.refcount] |
||
1166 | @@: |
||
1167 | mov eax, ebx |
||
1168 | call destroy_kernel_object |
||
1169 | |||
1170 | pop ebx |
||
1171 | popfd |
||
1172 | |||
1173 | ret |
||
1174 | |||
1175 | E_NOTFOUND equ 5 |
||
1176 | E_ACCESS equ 10 |
||
1177 | E_NOMEM equ 30 |
||
1178 | E_PARAM equ 33 |
||
1179 | |||
1180 | SHM_READ equ 0 |
||
1181 | SHM_WRITE equ 1 |
||
1182 | |||
1183 | SHM_ACCESS_MASK equ 3 |
||
1184 | |||
1185 | SHM_OPEN equ (0 shl 2) |
||
1186 | SHM_OPEN_ALWAYS equ (1 shl 2) |
||
1187 | SHM_CREATE equ (2 shl 2) |
||
1188 | |||
1189 | SHM_OPEN_MASK equ (3 shl 2) |
||
1190 | |||
1191 | align 4 |
||
1192 | proc shmem_open stdcall name:dword, size:dword, access:dword |
||
1193 | locals |
||
1194 | action dd ? |
||
1195 | owner_access dd ? |
||
1196 | mapped dd ? |
||
1197 | endl |
||
1198 | |||
1199 | push ebx |
||
1200 | push esi |
||
1201 | push edi |
||
1202 | |||
1203 | mov [mapped], 0 |
||
1204 | mov [owner_access], 0 |
||
1205 | |||
1206 | pushfd ;mutex required |
||
1207 | cli |
||
1208 | |||
1209 | mov eax, [access] |
||
1210 | and eax, SHM_OPEN_MASK |
||
1211 | mov [action], eax |
||
1212 | |||
1213 | mov eax, [name] |
||
1214 | test eax, eax |
||
1215 | mov edx, E_PARAM |
||
1216 | jz .exit |
||
1217 | |||
1218 | mov esi, [shmem_list.fd] |
||
1219 | align 4 |
||
1220 | @@: |
||
1221 | cmp esi, shmem_list |
||
1222 | je .not_found |
||
1223 | |||
1224 | lea edx, [esi+SHMEM.name] ; link , base, size |
||
1225 | stdcall strncmp, edx, eax, 32 |
||
1226 | test eax, eax |
||
1227 | je .found |
||
1228 | |||
1229 | mov esi, [esi+SHMEM.fd] |
||
1230 | jmp @B |
||
1231 | |||
1232 | .not_found: |
||
1233 | mov eax, [action] |
||
1234 | |||
1235 | cmp eax, SHM_OPEN |
||
1236 | mov edx, E_NOTFOUND |
||
1237 | je .exit |
||
1238 | |||
1239 | cmp eax, SHM_CREATE |
||
1240 | mov edx, E_PARAM |
||
1241 | je .create_shm |
||
1242 | |||
1243 | cmp eax, SHM_OPEN_ALWAYS |
||
1244 | jne .exit |
||
1245 | |||
1246 | .create_shm: |
||
1247 | |||
1248 | mov ecx, [size] |
||
1249 | test ecx, ecx |
||
1250 | jz .exit |
||
1251 | |||
1252 | add ecx, 4095 |
||
1253 | and ecx, -4096 |
||
1254 | mov [size], ecx |
||
1255 | |||
1256 | mov eax, SHMEM.sizeof |
||
1257 | call malloc |
||
1258 | test eax, eax |
||
1259 | mov esi, eax |
||
1260 | mov edx, E_NOMEM |
||
1261 | jz .exit |
||
1262 | |||
1263 | stdcall kernel_alloc, [size] |
||
1264 | test eax, eax |
||
1265 | mov [mapped], eax |
||
1266 | mov edx, E_NOMEM |
||
1267 | jz .cleanup |
||
1268 | |||
1269 | mov ecx, [size] |
||
1270 | mov edx, [access] |
||
1271 | and edx, SHM_ACCESS_MASK |
||
1272 | |||
1273 | mov [esi+SHMEM.base], eax |
||
1274 | mov [esi+SHMEM.size], ecx |
||
1275 | mov [esi+SHMEM.access], edx |
||
1276 | mov [esi+SHMEM.refcount], 0 |
||
1277 | mov [esi+SHMEM.name+28], 0 |
||
1278 | |||
1279 | lea eax, [esi+SHMEM.name] |
||
1280 | stdcall strncpy, eax, [name], 31 |
||
1281 | |||
1282 | mov eax, [shmem_list.fd] |
||
1283 | mov [esi+SHMEM.bk], shmem_list |
||
1284 | mov [esi+SHMEM.fd], eax |
||
1285 | |||
1286 | mov [eax+SHMEM.bk], esi |
||
1287 | mov [shmem_list.fd], esi |
||
1288 | |||
1289 | mov [action], SHM_OPEN |
||
1290 | mov [owner_access], SHM_WRITE |
||
1291 | |||
1292 | .found: |
||
1293 | mov eax, [action] |
||
1294 | |||
1295 | cmp eax, SHM_CREATE |
||
1296 | mov edx, E_ACCESS |
||
1297 | je .exit |
||
1298 | |||
1299 | cmp eax, SHM_OPEN |
||
1300 | mov edx, E_PARAM |
||
1301 | je .create_map |
||
1302 | |||
1303 | cmp eax, SHM_OPEN_ALWAYS |
||
1304 | jne .exit |
||
1305 | |||
1306 | .create_map: |
||
1307 | |||
1308 | mov eax, [access] |
||
1309 | and eax, SHM_ACCESS_MASK |
||
1310 | cmp eax, [esi+SHMEM.access] |
||
1311 | mov [access], eax |
||
1312 | mov edx, E_ACCESS |
||
1313 | ja .exit |
||
1314 | |||
1315 | mov ebx, [CURRENT_TASK] |
||
1316 | shl ebx, 5 |
||
1317 | mov ebx, [CURRENT_TASK+ebx+4] |
||
1318 | mov eax, SHMAP.sizeof |
||
1319 | |||
1320 | call create_kernel_object |
||
1321 | test eax, eax |
||
1322 | mov edi, eax |
||
1323 | mov edx, E_NOMEM |
||
1324 | jz .exit |
||
1325 | |||
1326 | mov [edi+SHMAP.magic], 'SMEM' |
||
1327 | mov [edi+SHMAP.destroy], destroy_smap |
||
1328 | mov [edi+SHMAP.base], 0 |
||
1329 | mov [edi+SHMAP.parent], 0 |
||
1330 | |||
1331 | stdcall user_alloc, [esi+SHMEM.size] |
||
1332 | test eax, eax |
||
1333 | mov [mapped], eax |
||
1334 | mov edx, E_NOMEM |
||
1335 | jz .cleanup2 |
||
1336 | |||
1337 | lock inc [esi+SHMEM.refcount] |
||
1338 | mov [edi+SHMAP.base], eax |
||
1339 | mov [edi+SHMAP.parent], esi |
||
1340 | |||
1341 | mov ecx, [esi+SHMEM.size] |
||
1342 | mov [size], ecx |
||
1343 | |||
1344 | shr ecx, 12 |
||
1345 | shr eax, 10 |
||
1346 | |||
1347 | mov esi, [esi+SHMEM.base] |
||
1348 | shr esi, 10 |
||
1349 | lea edi, [page_tabs+eax] |
||
1350 | add esi, page_tabs |
||
1351 | |||
1352 | mov edx, [access] |
||
1353 | or edx, [owner_access] |
||
1354 | shl edx, 1 |
||
1355 | or edx, PG_USER+PG_SHARED |
||
1356 | @@: |
||
1357 | lodsd |
||
1358 | and eax, 0xFFFFF000 |
||
1359 | or eax, edx |
||
1360 | stosd |
||
1361 | loop @B |
||
1362 | |||
1363 | xor edx, edx |
||
1364 | |||
1365 | cmp [owner_access], 0 |
||
1366 | jne .exit |
||
1367 | |||
1368 | mov edx, [size] |
||
1369 | .exit: |
||
1370 | mov eax, [mapped] |
||
1371 | |||
1372 | popfd |
||
1373 | pop edi |
||
1374 | pop esi |
||
1375 | pop ebx |
||
1376 | ret |
||
1377 | |||
1378 | .cleanup: |
||
1379 | mov eax, esi |
||
1380 | call free |
||
1381 | jmp .exit |
||
1382 | |||
1383 | .cleanup2: |
||
1384 | mov eax, edi |
||
1385 | call destroy_smap |
||
1386 | jmp .exit |
||
1387 | endp=> |