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Rev | Author | Line No. | Line |
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431 | serge | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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1289 | diamond | 3 | ;; Copyright (C) KolibriOS team 2004-2009. All rights reserved. ;; |
431 | serge | 4 | ;; Distributed under terms of the GNU General Public License ;; |
5 | ;; ;; |
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6 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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164 | serge | 7 | |
593 | mikedld | 8 | $Revision: 2154 $ |
9 | |||
10 | |||
164 | serge | 11 | struc MEM_BLOCK |
2154 | serge | 12 | { |
13 | .list LHEAD |
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14 | .next_block dd ? ;+8 |
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164 | serge | 15 | .prev_block dd ? ;+4 |
16 | .base dd ? ;+16 |
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17 | .size dd ? ;+20 |
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18 | .flags dd ? ;+24 |
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19 | .handle dd ? ;+28 |
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2154 | serge | 20 | .sizeof: |
164 | serge | 21 | } |
22 | |||
23 | FREE_BLOCK equ 4 |
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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 | |||
32 | block_next equ MEM_BLOCK.next_block |
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33 | block_prev equ MEM_BLOCK.prev_block |
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2154 | serge | 34 | list_fd equ MEM_BLOCK.list.next |
35 | list_bk equ MEM_BLOCK.list.prev |
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164 | serge | 36 | block_base equ MEM_BLOCK.base |
37 | block_size equ MEM_BLOCK.size |
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38 | block_flags equ MEM_BLOCK.flags |
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39 | |||
40 | macro calc_index op |
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41 | { shr op, 12 |
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42 | dec op |
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43 | cmp op, 63 |
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44 | jna @f |
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45 | mov op, 63 |
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46 | @@: |
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47 | } |
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48 | |||
49 | macro remove_from_used op |
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50 | { |
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357 | serge | 51 | mov edx, [op+list_fd] |
52 | mov ecx, [op+list_bk] |
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53 | mov [edx+list_bk], ecx |
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54 | mov [ecx+list_fd], edx |
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55 | mov [op+list_fd], 0 |
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56 | mov [op+list_bk], 0 |
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164 | serge | 57 | } |
58 | |||
2154 | serge | 59 | ;Initial heap state |
60 | ; |
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61 | ;+heap_size terminator USED_BLOCK |
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62 | ;+4096*MEM_BLOCK.sizeof free space FREE_BLOCK |
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63 | ;HEAP_BASE heap_descriptors USED_BLOCK |
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64 | ; |
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65 | |||
164 | serge | 66 | align 4 |
67 | proc init_kernel_heap |
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68 | |||
1130 | diamond | 69 | mov ecx, 64 |
164 | serge | 70 | mov edi, mem_block_list |
2154 | serge | 71 | @@: |
72 | mov eax, edi |
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73 | stosd |
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74 | stosd |
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75 | loop @B |
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164 | serge | 76 | |
2154 | serge | 77 | mov eax, mem_used.fd |
357 | serge | 78 | mov [mem_used.fd], eax |
79 | mov [mem_used.bk], eax |
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80 | |||
164 | serge | 81 | stdcall alloc_pages, dword 32 |
82 | mov ecx, 32 |
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83 | mov edx, eax |
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84 | mov edi, HEAP_BASE |
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85 | .l1: |
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86 | stdcall map_page,edi,edx,PG_SW |
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87 | add edi, 0x1000 |
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88 | add edx, 0x1000 |
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89 | dec ecx |
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90 | jnz .l1 |
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91 | |||
2154 | serge | 92 | mov edi, HEAP_BASE ;descriptors |
93 | mov ebx, HEAP_BASE+MEM_BLOCK.sizeof ;free space |
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94 | mov ecx, HEAP_BASE+MEM_BLOCK.sizeof*2 ;terminator |
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95 | |||
164 | serge | 96 | xor eax, eax |
97 | mov [edi+block_next], ebx |
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98 | mov [edi+block_prev], eax |
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357 | serge | 99 | mov [edi+list_fd], eax |
100 | mov [edi+list_bk], eax |
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164 | serge | 101 | mov [edi+block_base], HEAP_BASE |
2154 | serge | 102 | mov [edi+block_size], 4096*MEM_BLOCK.sizeof |
164 | serge | 103 | mov [edi+block_flags], USED_BLOCK |
104 | |||
2154 | serge | 105 | mov [ecx+block_next], eax |
106 | mov [ecx+block_prev], ebx |
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107 | mov [edi+list_fd], eax |
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108 | mov [edi+list_bk], eax |
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109 | mov [edi+block_base], eax |
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110 | mov [edi+block_size], eax |
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111 | mov [edi+block_flags], USED_BLOCK |
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164 | serge | 112 | |
2154 | serge | 113 | mov [ebx+block_next], ecx |
114 | mov [ebx+block_prev], edi |
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115 | mov [ebx+block_base], HEAP_BASE+4096*MEM_BLOCK.sizeof |
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116 | |||
1090 | diamond | 117 | mov ecx, [pg_data.kernel_pages] |
118 | shl ecx, 12 |
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2154 | serge | 119 | sub ecx, HEAP_BASE-OS_BASE+4096*MEM_BLOCK.sizeof |
170 | serge | 120 | mov [heap_size], ecx |
121 | mov [heap_free], ecx |
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164 | serge | 122 | mov [ebx+block_size], ecx |
123 | mov [ebx+block_flags], FREE_BLOCK |
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124 | |||
125 | mov [mem_block_mask], eax |
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126 | mov [mem_block_mask+4],0x80000000 |
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127 | |||
2154 | serge | 128 | mov ecx, mem_block_list+63*8 |
129 | list_add ebx, ecx |
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130 | |||
131 | mov ecx, 4096-3-1 |
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132 | mov eax, HEAP_BASE+MEM_BLOCK.sizeof*4 |
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133 | |||
134 | mov [next_memblock], HEAP_BASE+MEM_BLOCK.sizeof*3 |
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135 | @@: |
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136 | mov [eax-MEM_BLOCK.sizeof], eax |
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137 | add eax, MEM_BLOCK.sizeof |
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138 | loop @B |
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139 | |||
140 | mov [eax-MEM_BLOCK.sizeof], dword 0 |
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141 | |||
142 | |||
2129 | serge | 143 | mov ecx, heap_mutex |
144 | call mutex_init |
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2154 | serge | 145 | mov [heap_blocks], 4094 |
146 | mov [free_blocks], 4093 |
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164 | serge | 147 | ret |
148 | endp |
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149 | |||
369 | serge | 150 | ; param |
151 | ; eax= required size |
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152 | ; |
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153 | ; retval |
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154 | ; edi= memory block descriptor |
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155 | ; ebx= descriptor index |
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156 | |||
164 | serge | 157 | align 4 |
819 | serge | 158 | get_small_block: |
164 | serge | 159 | mov ecx, eax |
369 | serge | 160 | shr ecx, 12 |
161 | dec ecx |
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162 | cmp ecx, 63 |
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163 | jle .get_index |
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164 | mov ecx, 63 |
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165 | .get_index: |
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166 | lea esi, [mem_block_mask] |
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164 | serge | 167 | xor ebx, ebx |
369 | serge | 168 | or edx, -1 |
164 | serge | 169 | |
170 | cmp ecx, 32 |
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171 | jb .bit_test |
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172 | |||
173 | sub ecx, 32 |
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174 | add ebx, 32 |
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175 | add esi, 4 |
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176 | .bit_test: |
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177 | shl edx, cl |
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369 | serge | 178 | and edx, [esi] |
179 | .find: |
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180 | bsf edi, edx |
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164 | serge | 181 | jz .high_mask |
369 | serge | 182 | add ebx, edi |
2154 | serge | 183 | lea ecx, [mem_block_list+ebx*8] |
184 | mov edi, ecx |
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185 | .next: |
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186 | mov edi, [edi+list_fd] |
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187 | cmp edi, ecx |
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188 | je .err |
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369 | serge | 189 | cmp eax, [edi+block_size] |
190 | ja .next |
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164 | serge | 191 | ret |
2154 | serge | 192 | .err: |
193 | xor edi, edi |
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194 | ret |
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164 | serge | 195 | |
196 | .high_mask: |
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197 | add esi, 4 |
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369 | serge | 198 | cmp esi, mem_block_mask+8 |
199 | jae .err |
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164 | serge | 200 | add ebx, 32 |
369 | serge | 201 | mov edx, [esi] |
202 | jmp .find |
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164 | serge | 203 | |
204 | |||
819 | serge | 205 | align 4 |
206 | free_mem_block: |
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2154 | serge | 207 | mov ebx, [next_memblock] |
208 | mov [eax], ebx |
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209 | mov [next_memblock], eax |
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210 | xor ebx, ebx |
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357 | serge | 211 | |
2154 | serge | 212 | mov dword [eax+4], ebx |
213 | mov dword [eax+8], ebx |
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214 | mov dword [eax+12], ebx |
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215 | mov dword [eax+16], ebx |
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216 | ; mov dword [eax+20], 0 ;don't clear block size |
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217 | mov dword [eax+24], ebx |
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218 | mov dword [eax+28], ebx |
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170 | serge | 219 | inc [free_blocks] |
164 | serge | 220 | ret |
221 | |||
222 | align 4 |
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223 | proc alloc_kernel_space stdcall, size:dword |
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224 | local block_ind:DWORD |
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225 | |||
660 | serge | 226 | push ebx |
227 | push esi |
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228 | push edi |
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229 | |||
164 | serge | 230 | mov eax, [size] |
206 | serge | 231 | add eax, 4095 |
232 | and eax, not 4095 |
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164 | serge | 233 | mov [size], eax |
279 | serge | 234 | |
170 | serge | 235 | cmp eax, [heap_free] |
236 | ja .error |
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164 | serge | 237 | |
2154 | serge | 238 | mov ecx, heap_mutex |
239 | call mutex_lock |
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240 | |||
241 | mov eax, [size] |
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242 | |||
819 | serge | 243 | call get_small_block ; eax |
369 | serge | 244 | test edi, edi |
2154 | serge | 245 | jz .error_unlock |
164 | serge | 246 | |
247 | cmp [edi+block_flags], FREE_BLOCK |
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2154 | serge | 248 | jne .error_unlock |
164 | serge | 249 | |
250 | mov [block_ind], ebx ;index of allocated block |
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251 | |||
252 | mov eax, [edi+block_size] |
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253 | cmp eax, [size] |
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254 | je .m_eq_size |
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255 | |||
2154 | serge | 256 | mov esi, [next_memblock] ;new memory block |
257 | test esi, esi |
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258 | jz .error_unlock |
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164 | serge | 259 | |
2154 | serge | 260 | dec [free_blocks] |
261 | mov eax, [esi] |
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262 | mov [next_memblock], eax |
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164 | serge | 263 | |
264 | mov [esi+block_next], edi |
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265 | mov eax, [edi+block_prev] |
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266 | mov [esi+block_prev], eax |
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267 | mov [edi+block_prev], esi |
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357 | serge | 268 | mov [esi+list_fd], 0 |
269 | mov [esi+list_bk], 0 |
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164 | serge | 270 | mov [eax+block_next], esi |
2154 | serge | 271 | |
164 | serge | 272 | mov ebx, [edi+block_base] |
273 | mov [esi+block_base], ebx |
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274 | mov edx, [size] |
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275 | mov [esi+block_size], edx |
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276 | add [edi+block_base], edx |
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277 | sub [edi+block_size], edx |
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278 | |||
279 | mov eax, [edi+block_size] |
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2154 | serge | 280 | calc_index eax |
164 | serge | 281 | cmp eax, [block_ind] |
282 | je .m_eq_ind |
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283 | |||
2154 | serge | 284 | list_del edi |
164 | serge | 285 | |
286 | mov ecx, [block_ind] |
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2154 | serge | 287 | lea edx, [mem_block_list+ecx*8] |
288 | cmp edx, [edx] |
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164 | serge | 289 | jnz @f |
290 | btr [mem_block_mask], ecx |
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291 | @@: |
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292 | bts [mem_block_mask], eax |
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2154 | serge | 293 | lea edx, [mem_block_list+eax*8] ;edx= list head |
294 | list_add edi, edx |
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164 | serge | 295 | .m_eq_ind: |
2154 | serge | 296 | mov ecx, mem_used.fd |
357 | serge | 297 | mov edx, [ecx+list_fd] |
298 | mov [esi+list_fd], edx |
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299 | mov [esi+list_bk], ecx |
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300 | mov [ecx+list_fd], esi |
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301 | mov [edx+list_bk], esi |
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302 | |||
164 | serge | 303 | mov [esi+block_flags], USED_BLOCK |
170 | serge | 304 | mov ebx, [size] |
305 | sub [heap_free], ebx |
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2129 | serge | 306 | mov ecx, heap_mutex |
307 | call mutex_unlock |
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308 | mov eax, [esi+block_base] |
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660 | serge | 309 | pop edi |
310 | pop esi |
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311 | pop ebx |
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164 | serge | 312 | ret |
313 | .m_eq_size: |
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2154 | serge | 314 | list_del edi |
315 | lea edx, [mem_block_list+ebx*8] |
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316 | cmp edx, [edx] |
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164 | serge | 317 | jnz @f |
192 | serge | 318 | btr [mem_block_mask], ebx |
164 | serge | 319 | @@: |
2154 | serge | 320 | mov ecx, mem_used.fd |
357 | serge | 321 | mov edx, [ecx+list_fd] |
322 | mov [edi+list_fd], edx |
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323 | mov [edi+list_bk], ecx |
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324 | mov [ecx+list_fd], edi |
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325 | mov [edx+list_bk], edi |
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326 | |||
164 | serge | 327 | mov [edi+block_flags], USED_BLOCK |
170 | serge | 328 | mov ebx, [size] |
329 | sub [heap_free], ebx |
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2129 | serge | 330 | mov ecx, heap_mutex |
331 | call mutex_unlock |
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332 | mov eax, [edi+block_base] |
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660 | serge | 333 | pop edi |
334 | pop esi |
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335 | pop ebx |
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164 | serge | 336 | ret |
2154 | serge | 337 | |
338 | .error_unlock: |
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2129 | serge | 339 | mov ecx, heap_mutex |
340 | call mutex_unlock |
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2154 | serge | 341 | .error: |
164 | serge | 342 | xor eax, eax |
660 | serge | 343 | pop edi |
344 | pop esi |
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345 | pop ebx |
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164 | serge | 346 | ret |
347 | endp |
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348 | |||
349 | align 4 |
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321 | diamond | 350 | proc free_kernel_space stdcall uses ebx ecx edx esi edi, base:dword |
279 | serge | 351 | |
2129 | serge | 352 | mov ecx, heap_mutex |
353 | call mutex_lock |
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354 | |||
164 | serge | 355 | mov eax, [base] |
357 | serge | 356 | mov esi, [mem_used.fd] |
164 | serge | 357 | @@: |
2154 | serge | 358 | cmp esi, mem_used.fd |
357 | serge | 359 | je .fail |
164 | serge | 360 | |
361 | cmp [esi+block_base], eax |
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362 | je .found |
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357 | serge | 363 | mov esi, [esi+list_fd] |
164 | serge | 364 | jmp @b |
365 | .found: |
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366 | cmp [esi+block_flags], USED_BLOCK |
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367 | jne .fail |
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368 | |||
170 | serge | 369 | mov eax, [esi+block_size] |
370 | add [heap_free], eax |
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371 | |||
164 | serge | 372 | mov edi, [esi+block_next] |
373 | cmp [edi+block_flags], FREE_BLOCK |
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374 | jne .prev |
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375 | |||
2154 | serge | 376 | list_del edi |
164 | serge | 377 | |
378 | mov edx, [edi+block_next] |
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379 | mov [esi+block_next], edx |
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380 | mov [edx+block_prev], esi |
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381 | mov ecx, [edi+block_size] |
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382 | add [esi+block_size], ecx |
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383 | |||
2154 | serge | 384 | calc_index ecx |
385 | |||
386 | lea edx, [mem_block_list+ecx*8] |
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387 | cmp edx, [edx] |
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388 | jne @F |
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389 | btr [mem_block_mask], ecx |
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390 | @@: |
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164 | serge | 391 | mov eax, edi |
392 | call free_mem_block |
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393 | .prev: |
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394 | mov edi, [esi+block_prev] |
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395 | cmp [edi+block_flags], FREE_BLOCK |
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396 | jne .insert |
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397 | |||
398 | remove_from_used esi |
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399 | |||
400 | mov edx, [esi+block_next] |
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401 | mov [edi+block_next], edx |
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402 | mov [edx+block_prev], edi |
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2154 | serge | 403 | |
164 | serge | 404 | mov eax, esi |
405 | call free_mem_block |
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406 | |||
407 | mov ecx, [edi+block_size] |
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408 | mov eax, [esi+block_size] |
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409 | add eax, ecx |
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410 | mov [edi+block_size], eax |
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411 | |||
2154 | serge | 412 | calc_index eax ;new index |
413 | calc_index ecx ;old index |
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164 | serge | 414 | cmp eax, ecx |
415 | je .m_eq |
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416 | |||
417 | push ecx |
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2154 | serge | 418 | list_del edi |
164 | serge | 419 | pop ecx |
420 | |||
2154 | serge | 421 | lea edx, [mem_block_list+ecx*8] |
422 | cmp edx, [edx] |
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423 | jne .add_block |
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164 | serge | 424 | btr [mem_block_mask], ecx |
2154 | serge | 425 | .add_block: |
164 | serge | 426 | bts [mem_block_mask], eax |
2154 | serge | 427 | lea edx, [mem_block_list+eax*8] |
428 | list_add edi, edx |
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164 | serge | 429 | .m_eq: |
2129 | serge | 430 | mov ecx, heap_mutex |
431 | call mutex_unlock |
||
164 | serge | 432 | xor eax, eax |
2129 | serge | 433 | not eax |
164 | serge | 434 | ret |
435 | .insert: |
||
436 | remove_from_used esi |
||
2154 | serge | 437 | mov [esi+block_flags], FREE_BLOCK |
164 | serge | 438 | mov eax, [esi+block_size] |
439 | calc_index eax |
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2154 | serge | 440 | mov edi, esi |
441 | jmp .add_block |
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164 | serge | 442 | |
443 | .fail: |
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2129 | serge | 444 | mov ecx, heap_mutex |
445 | call mutex_unlock |
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164 | serge | 446 | xor eax, eax |
447 | ret |
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448 | endp |
||
449 | |||
450 | align 4 |
||
451 | proc kernel_alloc stdcall, size:dword |
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452 | locals |
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453 | lin_addr dd ? |
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454 | pages_count dd ? |
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455 | endl |
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456 | |||
662 | serge | 457 | push ebx |
458 | push edi |
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459 | |||
164 | serge | 460 | mov eax, [size] |
206 | serge | 461 | add eax, 4095 |
462 | and eax, not 4095; |
||
164 | serge | 463 | mov [size], eax |
464 | and eax, eax |
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357 | serge | 465 | jz .err |
164 | serge | 466 | mov ebx, eax |
467 | shr ebx, 12 |
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468 | mov [pages_count], ebx |
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469 | |||
470 | stdcall alloc_kernel_space, eax |
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357 | serge | 471 | test eax, eax |
472 | jz .err |
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164 | serge | 473 | mov [lin_addr], eax |
474 | |||
475 | mov ecx, [pages_count] |
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476 | mov edx, eax |
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477 | mov ebx, ecx |
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478 | |||
479 | shr ecx, 3 |
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480 | jz .next |
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481 | |||
482 | and ebx, not 7 |
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483 | push ebx |
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484 | stdcall alloc_pages, ebx |
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485 | pop ecx ; yes ecx!!! |
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486 | and eax, eax |
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357 | serge | 487 | jz .err |
164 | serge | 488 | |
489 | mov edi, eax |
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490 | mov edx, [lin_addr] |
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491 | @@: |
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492 | stdcall map_page,edx,edi,dword PG_SW |
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493 | add edx, 0x1000 |
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494 | add edi, 0x1000 |
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495 | dec ecx |
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496 | jnz @B |
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497 | .next: |
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498 | mov ecx, [pages_count] |
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499 | and ecx, 7 |
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500 | jz .end |
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357 | serge | 501 | @@: |
502 | push ecx |
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164 | serge | 503 | call alloc_page |
504 | pop ecx |
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505 | test eax, eax |
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357 | serge | 506 | jz .err |
164 | serge | 507 | |
508 | stdcall map_page,edx,eax,dword PG_SW |
||
509 | add edx, 0x1000 |
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510 | dec ecx |
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511 | jnz @B |
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512 | .end: |
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513 | mov eax, [lin_addr] |
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662 | serge | 514 | pop edi |
515 | pop ebx |
||
164 | serge | 516 | ret |
357 | serge | 517 | .err: |
164 | serge | 518 | xor eax, eax |
662 | serge | 519 | pop edi |
520 | pop ebx |
||
164 | serge | 521 | ret |
522 | endp |
||
523 | |||
524 | align 4 |
||
525 | proc kernel_free stdcall, base:dword |
||
321 | diamond | 526 | push ebx esi |
164 | serge | 527 | |
2129 | serge | 528 | mov ecx, heap_mutex |
529 | call mutex_lock |
||
279 | serge | 530 | |
164 | serge | 531 | mov eax, [base] |
357 | serge | 532 | mov esi, [mem_used.fd] |
164 | serge | 533 | @@: |
2154 | serge | 534 | cmp esi, mem_used.fd |
357 | serge | 535 | je .fail |
164 | serge | 536 | |
537 | cmp [esi+block_base], eax |
||
538 | je .found |
||
357 | serge | 539 | mov esi, [esi+list_fd] |
164 | serge | 540 | jmp @b |
541 | .found: |
||
542 | cmp [esi+block_flags], USED_BLOCK |
||
543 | jne .fail |
||
544 | |||
2129 | serge | 545 | call mutex_unlock |
279 | serge | 546 | |
164 | serge | 547 | mov ecx, [esi+block_size]; |
281 | serge | 548 | shr ecx, 12 |
279 | serge | 549 | call release_pages ;eax, ecx |
164 | serge | 550 | stdcall free_kernel_space, [base] |
321 | diamond | 551 | pop esi ebx |
279 | serge | 552 | ret |
164 | serge | 553 | .fail: |
2129 | serge | 554 | call mutex_unlock |
1615 | serge | 555 | xor eax, eax |
321 | diamond | 556 | pop esi ebx |
164 | serge | 557 | ret |
558 | endp |
||
559 | |||
560 | restore block_next |
||
561 | restore block_prev |
||
562 | restore block_list |
||
563 | restore block_base |
||
564 | restore block_size |
||
565 | restore block_flags |
||
566 | |||
567 | ;;;;;;;;;;;;;; USER ;;;;;;;;;;;;;;;;; |
||
568 | |||
188 | serge | 569 | HEAP_TOP equ 0x5FC00000 |
570 | |||
164 | serge | 571 | align 4 |
188 | serge | 572 | proc init_heap |
164 | serge | 573 | |
465 | serge | 574 | mov ebx,[current_slot] |
575 | mov eax, [ebx+APPDATA.heap_top] |
||
172 | serge | 576 | test eax, eax |
577 | jz @F |
||
465 | serge | 578 | sub eax,[ebx+APPDATA.heap_base] |
172 | serge | 579 | sub eax, 4096 |
580 | ret |
||
581 | @@: |
||
465 | serge | 582 | mov esi, [ebx+APPDATA.mem_size] |
188 | serge | 583 | add esi, 4095 |
584 | and esi, not 4095 |
||
465 | serge | 585 | mov [ebx+APPDATA.mem_size], esi |
188 | serge | 586 | mov eax, HEAP_TOP |
465 | serge | 587 | mov [ebx+APPDATA.heap_base], esi |
588 | mov [ebx+APPDATA.heap_top], eax |
||
164 | serge | 589 | |
188 | serge | 590 | sub eax, esi |
591 | shr esi, 10 |
||
592 | mov ecx, eax |
||
164 | serge | 593 | sub eax, 4096 |
188 | serge | 594 | or ecx, FREE_BLOCK |
365 | serge | 595 | mov [page_tabs+esi], ecx |
164 | serge | 596 | ret |
597 | endp |
||
598 | |||
599 | align 4 |
||
600 | proc user_alloc stdcall, alloc_size:dword |
||
601 | |||
662 | serge | 602 | push ebx |
603 | push esi |
||
604 | push edi |
||
605 | |||
164 | serge | 606 | mov ecx, [alloc_size] |
607 | add ecx, (4095+4096) |
||
608 | and ecx, not 4095 |
||
609 | |||
465 | serge | 610 | mov ebx, [current_slot] |
611 | mov esi, dword [ebx+APPDATA.heap_base] ; heap_base |
||
612 | mov edi, dword [ebx+APPDATA.heap_top] ; heap_top |
||
164 | serge | 613 | l_0: |
614 | cmp esi, edi |
||
615 | jae m_exit |
||
616 | |||
617 | mov ebx, esi |
||
618 | shr ebx, 12 |
||
365 | serge | 619 | mov eax, [page_tabs+ebx*4] |
620 | diamond | 620 | test al, FREE_BLOCK |
164 | serge | 621 | jz test_used |
622 | and eax, 0xFFFFF000 |
||
623 | cmp eax, ecx ;alloc_size |
||
624 | jb m_next |
||
940 | serge | 625 | jz @f |
164 | serge | 626 | |
620 | diamond | 627 | lea edx, [esi+ecx] |
628 | sub eax, ecx |
||
629 | or al, FREE_BLOCK |
||
164 | serge | 630 | shr edx, 12 |
365 | serge | 631 | mov [page_tabs+edx*4], eax |
294 | diamond | 632 | @@: |
164 | serge | 633 | or ecx, USED_BLOCK |
365 | serge | 634 | mov [page_tabs+ebx*4], ecx |
164 | serge | 635 | shr ecx, 12 |
620 | diamond | 636 | inc ebx |
164 | serge | 637 | dec ecx |
620 | diamond | 638 | jz .no |
164 | serge | 639 | @@: |
365 | serge | 640 | mov dword [page_tabs+ebx*4], 2 |
164 | serge | 641 | inc ebx |
642 | dec ecx |
||
643 | jnz @B |
||
620 | diamond | 644 | .no: |
164 | serge | 645 | |
465 | serge | 646 | mov edx, [current_slot] |
647 | mov ebx, [alloc_size] |
||
648 | add ebx, 0xFFF |
||
649 | and ebx, not 0xFFF |
||
650 | add ebx, [edx+APPDATA.mem_size] |
||
651 | call update_mem_size |
||
294 | diamond | 652 | |
620 | diamond | 653 | lea eax, [esi+4096] |
662 | serge | 654 | |
655 | pop edi |
||
656 | pop esi |
||
657 | pop ebx |
||
164 | serge | 658 | ret |
659 | test_used: |
||
620 | diamond | 660 | test al, USED_BLOCK |
164 | serge | 661 | jz m_exit |
662 | |||
663 | and eax, 0xFFFFF000 |
||
620 | diamond | 664 | m_next: |
164 | serge | 665 | add esi, eax |
666 | jmp l_0 |
||
667 | m_exit: |
||
668 | xor eax, eax |
||
662 | serge | 669 | pop edi |
670 | pop esi |
||
671 | pop ebx |
||
164 | serge | 672 | ret |
673 | endp |
||
674 | |||
675 | align 4 |
||
1289 | diamond | 676 | proc user_alloc_at stdcall, address:dword, alloc_size:dword |
677 | |||
678 | push ebx |
||
679 | push esi |
||
680 | push edi |
||
681 | |||
682 | mov ebx, [current_slot] |
||
683 | mov edx, [address] |
||
684 | and edx, not 0xFFF |
||
685 | mov [address], edx |
||
686 | sub edx, 0x1000 |
||
687 | jb .error |
||
688 | mov esi, [ebx+APPDATA.heap_base] |
||
689 | mov edi, [ebx+APPDATA.heap_top] |
||
690 | cmp edx, esi |
||
691 | jb .error |
||
692 | .scan: |
||
693 | cmp esi, edi |
||
694 | jae .error |
||
695 | mov ebx, esi |
||
696 | shr ebx, 12 |
||
697 | mov eax, [page_tabs+ebx*4] |
||
698 | mov ecx, eax |
||
699 | and ecx, 0xFFFFF000 |
||
700 | add ecx, esi |
||
701 | cmp edx, ecx |
||
702 | jb .found |
||
703 | mov esi, ecx |
||
704 | jmp .scan |
||
705 | .error: |
||
706 | xor eax, eax |
||
707 | pop edi |
||
708 | pop esi |
||
709 | pop ebx |
||
710 | ret |
||
711 | .found: |
||
712 | test al, FREE_BLOCK |
||
713 | jz .error |
||
714 | mov eax, ecx |
||
715 | sub eax, edx |
||
716 | sub eax, 0x1000 |
||
717 | cmp eax, [alloc_size] |
||
718 | jb .error |
||
719 | |||
720 | ; Here we have 1 big free block which includes requested area. |
||
721 | ; In general, 3 other blocks must be created instead: |
||
722 | ; free at [esi, edx); |
||
723 | ; busy at [edx, edx+0x1000+ALIGN_UP(alloc_size,0x1000)); |
||
724 | ; free at [edx+0x1000+ALIGN_UP(alloc_size,0x1000), ecx) |
||
725 | ; First or third block (or both) may be absent. |
||
726 | mov eax, edx |
||
727 | sub eax, esi |
||
728 | jz .nofirst |
||
729 | or al, FREE_BLOCK |
||
730 | mov [page_tabs+ebx*4], eax |
||
731 | .nofirst: |
||
732 | mov eax, [alloc_size] |
||
733 | add eax, 0x1FFF |
||
734 | and eax, not 0xFFF |
||
735 | mov ebx, edx |
||
736 | add edx, eax |
||
737 | shr ebx, 12 |
||
738 | or al, USED_BLOCK |
||
739 | mov [page_tabs+ebx*4], eax |
||
740 | shr eax, 12 |
||
741 | dec eax |
||
742 | jz .second_nofill |
||
743 | inc ebx |
||
744 | .fill: |
||
745 | mov dword [page_tabs+ebx*4], 2 |
||
746 | inc ebx |
||
747 | dec eax |
||
748 | jnz .fill |
||
749 | .second_nofill: |
||
750 | sub ecx, edx |
||
751 | jz .nothird |
||
752 | or cl, FREE_BLOCK |
||
753 | mov [page_tabs+ebx*4], ecx |
||
754 | .nothird: |
||
755 | |||
756 | mov edx, [current_slot] |
||
757 | mov ebx, [alloc_size] |
||
758 | add ebx, 0xFFF |
||
759 | and ebx, not 0xFFF |
||
760 | add ebx, [edx+APPDATA.mem_size] |
||
761 | call update_mem_size |
||
762 | |||
763 | mov eax, [address] |
||
764 | |||
765 | pop edi |
||
766 | pop esi |
||
767 | pop ebx |
||
768 | ret |
||
769 | endp |
||
770 | |||
771 | align 4 |
||
164 | serge | 772 | proc user_free stdcall, base:dword |
773 | |||
662 | serge | 774 | push esi |
775 | |||
164 | serge | 776 | mov esi, [base] |
777 | test esi, esi |
||
778 | jz .exit |
||
779 | |||
662 | serge | 780 | push ebx |
781 | |||
294 | diamond | 782 | xor ebx, ebx |
164 | serge | 783 | shr esi, 12 |
620 | diamond | 784 | mov eax, [page_tabs+(esi-1)*4] |
546 | diamond | 785 | test al, USED_BLOCK |
620 | diamond | 786 | jz .cantfree |
546 | diamond | 787 | test al, DONT_FREE_BLOCK |
788 | jnz .cantfree |
||
164 | serge | 789 | |
790 | and eax, not 4095 |
||
791 | mov ecx, eax |
||
620 | diamond | 792 | or al, FREE_BLOCK |
793 | mov [page_tabs+(esi-1)*4], eax |
||
164 | serge | 794 | sub ecx, 4096 |
620 | diamond | 795 | mov ebx, ecx |
164 | serge | 796 | shr ecx, 12 |
620 | diamond | 797 | jz .released |
164 | serge | 798 | .release: |
188 | serge | 799 | xor eax, eax |
365 | serge | 800 | xchg eax, [page_tabs+esi*4] |
620 | diamond | 801 | test al, 1 |
188 | serge | 802 | jz @F |
940 | serge | 803 | test eax, PG_SHARED |
804 | jnz @F |
||
164 | serge | 805 | call free_page |
448 | diamond | 806 | mov eax, esi |
807 | shl eax, 12 |
||
808 | invlpg [eax] |
||
188 | serge | 809 | @@: |
164 | serge | 810 | inc esi |
811 | dec ecx |
||
812 | jnz .release |
||
620 | diamond | 813 | .released: |
662 | serge | 814 | push edi |
815 | |||
465 | serge | 816 | mov edx, [current_slot] |
817 | mov esi, dword [edx+APPDATA.heap_base] |
||
818 | mov edi, dword [edx+APPDATA.heap_top] |
||
819 | sub ebx, [edx+APPDATA.mem_size] |
||
294 | diamond | 820 | neg ebx |
821 | call update_mem_size |
||
448 | diamond | 822 | call user_normalize |
662 | serge | 823 | pop edi |
824 | pop ebx |
||
825 | pop esi |
||
448 | diamond | 826 | ret |
827 | .exit: |
||
828 | xor eax, eax |
||
829 | inc eax |
||
662 | serge | 830 | pop esi |
448 | diamond | 831 | ret |
546 | diamond | 832 | .cantfree: |
833 | xor eax, eax |
||
662 | serge | 834 | pop ebx |
835 | pop esi |
||
546 | diamond | 836 | ret |
448 | diamond | 837 | endp |
838 | |||
839 | user_normalize: |
||
840 | ; in: esi=heap_base, edi=heap_top |
||
841 | ; out: eax=0 <=> OK |
||
842 | ; destroys: ebx,edx,esi,edi |
||
164 | serge | 843 | shr esi, 12 |
844 | shr edi, 12 |
||
845 | @@: |
||
365 | serge | 846 | mov eax, [page_tabs+esi*4] |
620 | diamond | 847 | test al, USED_BLOCK |
164 | serge | 848 | jz .test_free |
849 | shr eax, 12 |
||
850 | add esi, eax |
||
851 | jmp @B |
||
852 | .test_free: |
||
620 | diamond | 853 | test al, FREE_BLOCK |
164 | serge | 854 | jz .err |
855 | mov edx, eax |
||
856 | shr edx, 12 |
||
857 | add edx, esi |
||
858 | cmp edx, edi |
||
859 | jae .exit |
||
860 | |||
365 | serge | 861 | mov ebx, [page_tabs+edx*4] |
620 | diamond | 862 | test bl, USED_BLOCK |
164 | serge | 863 | jz .next_free |
864 | |||
865 | shr ebx, 12 |
||
866 | add edx, ebx |
||
867 | mov esi, edx |
||
868 | jmp @B |
||
869 | .next_free: |
||
620 | diamond | 870 | test bl, FREE_BLOCK |
164 | serge | 871 | jz .err |
365 | serge | 872 | and dword [page_tabs+edx*4], 0 |
164 | serge | 873 | add eax, ebx |
874 | and eax, not 4095 |
||
875 | or eax, FREE_BLOCK |
||
365 | serge | 876 | mov [page_tabs+esi*4], eax |
164 | serge | 877 | jmp @B |
878 | .exit: |
||
879 | xor eax, eax |
||
880 | inc eax |
||
881 | ret |
||
882 | .err: |
||
883 | xor eax, eax |
||
884 | ret |
||
885 | |||
448 | diamond | 886 | user_realloc: |
887 | ; in: eax = pointer, ebx = new size |
||
888 | ; out: eax = new pointer or NULL |
||
889 | test eax, eax |
||
890 | jnz @f |
||
891 | ; realloc(NULL,sz) - same as malloc(sz) |
||
892 | push ebx |
||
893 | call user_alloc |
||
894 | ret |
||
895 | @@: |
||
896 | push ecx edx |
||
465 | serge | 897 | lea ecx, [eax - 0x1000] |
448 | diamond | 898 | shr ecx, 12 |
899 | mov edx, [page_tabs+ecx*4] |
||
620 | diamond | 900 | test dl, USED_BLOCK |
448 | diamond | 901 | jnz @f |
902 | ; attempt to realloc invalid pointer |
||
903 | .ret0: |
||
904 | pop edx ecx |
||
905 | xor eax, eax |
||
906 | ret |
||
907 | @@: |
||
620 | diamond | 908 | test dl, DONT_FREE_BLOCK |
546 | diamond | 909 | jnz .ret0 |
448 | diamond | 910 | add ebx, 0x1FFF |
911 | shr edx, 12 |
||
912 | shr ebx, 12 |
||
913 | ; edx = allocated size, ebx = new size |
||
914 | add edx, ecx |
||
915 | add ebx, ecx |
||
916 | cmp edx, ebx |
||
917 | jb .realloc_add |
||
918 | ; release part of allocated memory |
||
919 | .loop: |
||
920 | cmp edx, ebx |
||
921 | jz .release_done |
||
922 | dec edx |
||
923 | xor eax, eax |
||
924 | xchg eax, [page_tabs+edx*4] |
||
925 | test al, 1 |
||
926 | jz .loop |
||
927 | call free_page |
||
928 | mov eax, edx |
||
929 | shl eax, 12 |
||
930 | invlpg [eax] |
||
931 | jmp .loop |
||
932 | .release_done: |
||
933 | sub ebx, ecx |
||
934 | cmp ebx, 1 |
||
935 | jnz .nofreeall |
||
936 | mov eax, [page_tabs+ecx*4] |
||
937 | and eax, not 0xFFF |
||
465 | serge | 938 | mov edx, [current_slot] |
939 | mov ebx, [APPDATA.mem_size+edx] |
||
448 | diamond | 940 | sub ebx, eax |
941 | add ebx, 0x1000 |
||
942 | or al, FREE_BLOCK |
||
943 | mov [page_tabs+ecx*4], eax |
||
944 | push esi edi |
||
465 | serge | 945 | mov esi, [APPDATA.heap_base+edx] |
946 | mov edi, [APPDATA.heap_top+edx] |
||
448 | diamond | 947 | call update_mem_size |
948 | call user_normalize |
||
949 | pop edi esi |
||
950 | jmp .ret0 ; all freed |
||
951 | .nofreeall: |
||
952 | sub edx, ecx |
||
953 | shl ebx, 12 |
||
954 | or ebx, USED_BLOCK |
||
955 | xchg [page_tabs+ecx*4], ebx |
||
956 | shr ebx, 12 |
||
957 | sub ebx, edx |
||
958 | push ebx ecx edx |
||
465 | serge | 959 | mov edx, [current_slot] |
448 | diamond | 960 | shl ebx, 12 |
465 | serge | 961 | sub ebx, [APPDATA.mem_size+edx] |
448 | diamond | 962 | neg ebx |
963 | call update_mem_size |
||
964 | pop edx ecx ebx |
||
465 | serge | 965 | lea eax, [ecx+1] |
448 | diamond | 966 | shl eax, 12 |
967 | push eax |
||
823 | diamond | 968 | add ecx, edx |
969 | lea edx, [ecx+ebx] |
||
448 | diamond | 970 | shl ebx, 12 |
971 | jz .ret |
||
972 | push esi |
||
465 | serge | 973 | mov esi, [current_slot] |
974 | mov esi, [APPDATA.heap_top+esi] |
||
448 | diamond | 975 | shr esi, 12 |
976 | @@: |
||
977 | cmp edx, esi |
||
978 | jae .merge_done |
||
979 | mov eax, [page_tabs+edx*4] |
||
980 | test al, USED_BLOCK |
||
823 | diamond | 981 | jnz .merge_done |
448 | diamond | 982 | and dword [page_tabs+edx*4], 0 |
823 | diamond | 983 | shr eax, 12 |
984 | add edx, eax |
||
985 | shl eax, 12 |
||
448 | diamond | 986 | add ebx, eax |
987 | jmp @b |
||
988 | .merge_done: |
||
989 | pop esi |
||
990 | or ebx, FREE_BLOCK |
||
991 | mov [page_tabs+ecx*4], ebx |
||
992 | .ret: |
||
993 | pop eax edx ecx |
||
994 | ret |
||
995 | .realloc_add: |
||
996 | ; get some additional memory |
||
465 | serge | 997 | mov eax, [current_slot] |
998 | mov eax, [APPDATA.heap_top+eax] |
||
448 | diamond | 999 | shr eax, 12 |
1000 | cmp edx, eax |
||
1001 | jae .cant_inplace |
||
1002 | mov eax, [page_tabs+edx*4] |
||
620 | diamond | 1003 | test al, FREE_BLOCK |
1004 | jz .cant_inplace |
||
448 | diamond | 1005 | shr eax, 12 |
1006 | add eax, edx |
||
620 | diamond | 1007 | sub eax, ebx |
448 | diamond | 1008 | jb .cant_inplace |
1009 | jz @f |
||
1010 | shl eax, 12 |
||
1011 | or al, FREE_BLOCK |
||
1012 | mov [page_tabs+ebx*4], eax |
||
1013 | @@: |
||
1014 | mov eax, ebx |
||
1015 | sub eax, ecx |
||
1016 | shl eax, 12 |
||
1017 | or al, USED_BLOCK |
||
1018 | mov [page_tabs+ecx*4], eax |
||
465 | serge | 1019 | lea eax, [ecx+1] |
448 | diamond | 1020 | shl eax, 12 |
1021 | push eax |
||
1022 | push edi |
||
1023 | lea edi, [page_tabs+edx*4] |
||
1024 | mov eax, 2 |
||
1025 | sub ebx, edx |
||
1026 | mov ecx, ebx |
||
1027 | cld |
||
1028 | rep stosd |
||
1029 | pop edi |
||
465 | serge | 1030 | mov edx, [current_slot] |
448 | diamond | 1031 | shl ebx, 12 |
465 | serge | 1032 | add ebx, [APPDATA.mem_size+edx] |
448 | diamond | 1033 | call update_mem_size |
1034 | pop eax edx ecx |
||
1035 | ret |
||
1036 | .cant_inplace: |
||
1037 | push esi edi |
||
465 | serge | 1038 | mov eax, [current_slot] |
1039 | mov esi, [APPDATA.heap_base+eax] |
||
1040 | mov edi, [APPDATA.heap_top+eax] |
||
448 | diamond | 1041 | shr esi, 12 |
1042 | shr edi, 12 |
||
1043 | sub ebx, ecx |
||
1044 | .find_place: |
||
1045 | cmp esi, edi |
||
1046 | jae .place_not_found |
||
1047 | mov eax, [page_tabs+esi*4] |
||
1048 | test al, FREE_BLOCK |
||
1049 | jz .next_place |
||
1050 | shr eax, 12 |
||
1051 | cmp eax, ebx |
||
1052 | jae .place_found |
||
1053 | add esi, eax |
||
1054 | jmp .find_place |
||
1055 | .next_place: |
||
1056 | shr eax, 12 |
||
1057 | add esi, eax |
||
1058 | jmp .find_place |
||
1059 | .place_not_found: |
||
1060 | pop edi esi |
||
1061 | jmp .ret0 |
||
1062 | .place_found: |
||
1063 | sub eax, ebx |
||
1064 | jz @f |
||
1065 | push esi |
||
620 | diamond | 1066 | add esi, ebx |
448 | diamond | 1067 | shl eax, 12 |
1068 | or al, FREE_BLOCK |
||
1069 | mov [page_tabs+esi*4], eax |
||
1070 | pop esi |
||
1071 | @@: |
||
1072 | mov eax, ebx |
||
1073 | shl eax, 12 |
||
1074 | or al, USED_BLOCK |
||
1075 | mov [page_tabs+esi*4], eax |
||
1076 | inc esi |
||
1077 | mov eax, esi |
||
1078 | shl eax, 12 |
||
1079 | push eax |
||
1080 | mov eax, [page_tabs+ecx*4] |
||
1081 | and eax, not 0xFFF |
||
1082 | or al, FREE_BLOCK |
||
1083 | sub edx, ecx |
||
1084 | mov [page_tabs+ecx*4], eax |
||
1085 | inc ecx |
||
620 | diamond | 1086 | dec ebx |
1087 | dec edx |
||
1088 | jz .no |
||
448 | diamond | 1089 | @@: |
1090 | xor eax, eax |
||
1091 | xchg eax, [page_tabs+ecx*4] |
||
1092 | mov [page_tabs+esi*4], eax |
||
940 | serge | 1093 | mov eax, ecx |
1094 | shl eax, 12 |
||
1095 | invlpg [eax] |
||
620 | diamond | 1096 | inc esi |
448 | diamond | 1097 | inc ecx |
1098 | dec ebx |
||
1099 | dec edx |
||
1100 | jnz @b |
||
620 | diamond | 1101 | .no: |
448 | diamond | 1102 | push ebx |
465 | serge | 1103 | mov edx, [current_slot] |
448 | diamond | 1104 | shl ebx, 12 |
465 | serge | 1105 | add ebx, [APPDATA.mem_size+edx] |
448 | diamond | 1106 | call update_mem_size |
1107 | pop ebx |
||
1108 | @@: |
||
1109 | mov dword [page_tabs+esi*4], 2 |
||
1110 | inc esi |
||
1111 | dec ebx |
||
1112 | jnz @b |
||
1113 | pop eax edi esi edx ecx |
||
1114 | ret |
||
1115 | |||
278 | serge | 1116 | if 0 |
164 | serge | 1117 | align 4 |
1118 | proc alloc_dll |
||
1119 | pushf |
||
1120 | cli |
||
1121 | bsf eax, [dll_map] |
||
1122 | jnz .find |
||
1123 | popf |
||
1124 | xor eax, eax |
||
1125 | ret |
||
1126 | .find: |
||
1127 | btr [dll_map], eax |
||
1128 | popf |
||
1129 | shl eax, 5 |
||
1130 | add eax, dll_tab |
||
1131 | ret |
||
1132 | endp |
||
1133 | |||
1134 | align 4 |
||
1135 | proc alloc_service |
||
1136 | pushf |
||
1137 | cli |
||
1138 | bsf eax, [srv_map] |
||
1139 | jnz .find |
||
1140 | popf |
||
1141 | xor eax, eax |
||
1142 | ret |
||
214 | serge | 1143 | .find: |
1144 | btr [srv_map], eax |
||
164 | serge | 1145 | popf |
214 | serge | 1146 | shl eax,0x02 |
1147 | lea eax,[srv_tab+eax+eax*8] ;srv_tab+eax*36 |
||
164 | serge | 1148 | ret |
1149 | endp |
||
278 | serge | 1150 | |
1151 | end if |
||
940 | serge | 1152 | |
1153 | |||
1154 | ;;;;;;;;;;;;;; SHARED ;;;;;;;;;;;;;;;;; |
||
1155 | |||
1156 | |||
1157 | ; param |
||
1158 | ; eax= shm_map object |
||
1159 | |||
1160 | align 4 |
||
1161 | destroy_smap: |
||
1162 | |||
1163 | pushfd |
||
1164 | cli |
||
1165 | |||
945 | serge | 1166 | push esi |
1167 | push edi |
||
940 | serge | 1168 | |
945 | serge | 1169 | mov edi, eax |
1170 | mov esi, [eax+SMAP.parent] |
||
1171 | test esi, esi |
||
1172 | jz .done |
||
940 | serge | 1173 | |
945 | serge | 1174 | lock dec [esi+SMEM.refcount] |
1175 | jnz .done |
||
940 | serge | 1176 | |
945 | serge | 1177 | mov ecx, [esi+SMEM.bk] |
1178 | mov edx, [esi+SMEM.fd] |
||
1179 | |||
1180 | mov [ecx+SMEM.fd], edx |
||
1181 | mov [edx+SMEM.bk], ecx |
||
1182 | |||
1183 | stdcall kernel_free, [esi+SMEM.base] |
||
1184 | mov eax, esi |
||
1185 | call free |
||
1186 | .done: |
||
1187 | mov eax, edi |
||
940 | serge | 1188 | call destroy_kernel_object |
1189 | |||
945 | serge | 1190 | pop edi |
1191 | pop esi |
||
940 | serge | 1192 | popfd |
1193 | |||
1194 | ret |
||
1195 | |||
1196 | E_NOTFOUND equ 5 |
||
1197 | E_ACCESS equ 10 |
||
1198 | E_NOMEM equ 30 |
||
1199 | E_PARAM equ 33 |
||
1200 | |||
1201 | SHM_READ equ 0 |
||
1202 | SHM_WRITE equ 1 |
||
1203 | |||
1204 | SHM_ACCESS_MASK equ 3 |
||
1205 | |||
1206 | SHM_OPEN equ (0 shl 2) |
||
1207 | SHM_OPEN_ALWAYS equ (1 shl 2) |
||
1208 | SHM_CREATE equ (2 shl 2) |
||
1209 | |||
1210 | SHM_OPEN_MASK equ (3 shl 2) |
||
1211 | |||
1212 | align 4 |
||
1213 | proc shmem_open stdcall name:dword, size:dword, access:dword |
||
1214 | locals |
||
1215 | action dd ? |
||
1216 | owner_access dd ? |
||
1217 | mapped dd ? |
||
1218 | endl |
||
1219 | |||
1220 | push ebx |
||
1221 | push esi |
||
1222 | push edi |
||
1223 | |||
1224 | mov [mapped], 0 |
||
1225 | mov [owner_access], 0 |
||
1226 | |||
1227 | pushfd ;mutex required |
||
1228 | cli |
||
1229 | |||
1230 | mov eax, [access] |
||
1231 | and eax, SHM_OPEN_MASK |
||
1232 | mov [action], eax |
||
1233 | |||
1213 | serge | 1234 | mov ebx, [name] |
1235 | test ebx, ebx |
||
940 | serge | 1236 | mov edx, E_PARAM |
1213 | serge | 1237 | jz .fail |
940 | serge | 1238 | |
1239 | mov esi, [shmem_list.fd] |
||
1240 | align 4 |
||
1241 | @@: |
||
1242 | cmp esi, shmem_list |
||
1243 | je .not_found |
||
1244 | |||
943 | serge | 1245 | lea edx, [esi+SMEM.name] ; link , base, size |
1213 | serge | 1246 | stdcall strncmp, edx, ebx, 32 |
940 | serge | 1247 | test eax, eax |
1248 | je .found |
||
1249 | |||
943 | serge | 1250 | mov esi, [esi+SMEM.fd] |
940 | serge | 1251 | jmp @B |
1252 | |||
1253 | .not_found: |
||
1254 | mov eax, [action] |
||
1255 | |||
1256 | cmp eax, SHM_OPEN |
||
1257 | mov edx, E_NOTFOUND |
||
1213 | serge | 1258 | je .fail |
940 | serge | 1259 | |
1260 | cmp eax, SHM_CREATE |
||
1261 | mov edx, E_PARAM |
||
1262 | je .create_shm |
||
1263 | |||
1264 | cmp eax, SHM_OPEN_ALWAYS |
||
1213 | serge | 1265 | jne .fail |
940 | serge | 1266 | |
1267 | .create_shm: |
||
1268 | |||
1269 | mov ecx, [size] |
||
1270 | test ecx, ecx |
||
1213 | serge | 1271 | jz .fail |
940 | serge | 1272 | |
1273 | add ecx, 4095 |
||
1274 | and ecx, -4096 |
||
1275 | mov [size], ecx |
||
1276 | |||
943 | serge | 1277 | mov eax, SMEM.sizeof |
940 | serge | 1278 | call malloc |
1279 | test eax, eax |
||
1280 | mov esi, eax |
||
1281 | mov edx, E_NOMEM |
||
1213 | serge | 1282 | jz .fail |
940 | serge | 1283 | |
1284 | stdcall kernel_alloc, [size] |
||
1285 | test eax, eax |
||
1286 | mov [mapped], eax |
||
1287 | mov edx, E_NOMEM |
||
1288 | jz .cleanup |
||
1289 | |||
1290 | mov ecx, [size] |
||
1291 | mov edx, [access] |
||
1292 | and edx, SHM_ACCESS_MASK |
||
1293 | |||
943 | serge | 1294 | mov [esi+SMEM.base], eax |
1295 | mov [esi+SMEM.size], ecx |
||
1296 | mov [esi+SMEM.access], edx |
||
1297 | mov [esi+SMEM.refcount], 0 |
||
1298 | mov [esi+SMEM.name+28], 0 |
||
940 | serge | 1299 | |
943 | serge | 1300 | lea eax, [esi+SMEM.name] |
940 | serge | 1301 | stdcall strncpy, eax, [name], 31 |
1302 | |||
1303 | mov eax, [shmem_list.fd] |
||
943 | serge | 1304 | mov [esi+SMEM.bk], shmem_list |
1305 | mov [esi+SMEM.fd], eax |
||
940 | serge | 1306 | |
943 | serge | 1307 | mov [eax+SMEM.bk], esi |
940 | serge | 1308 | mov [shmem_list.fd], esi |
1309 | |||
1310 | mov [action], SHM_OPEN |
||
1311 | mov [owner_access], SHM_WRITE |
||
1312 | |||
1313 | .found: |
||
1314 | mov eax, [action] |
||
1315 | |||
1316 | cmp eax, SHM_CREATE |
||
1317 | mov edx, E_ACCESS |
||
1318 | je .exit |
||
1319 | |||
1320 | cmp eax, SHM_OPEN |
||
1321 | mov edx, E_PARAM |
||
1322 | je .create_map |
||
1323 | |||
1324 | cmp eax, SHM_OPEN_ALWAYS |
||
1213 | serge | 1325 | jne .fail |
940 | serge | 1326 | |
1327 | .create_map: |
||
1328 | |||
1329 | mov eax, [access] |
||
1330 | and eax, SHM_ACCESS_MASK |
||
943 | serge | 1331 | cmp eax, [esi+SMEM.access] |
940 | serge | 1332 | mov [access], eax |
1333 | mov edx, E_ACCESS |
||
1213 | serge | 1334 | ja .fail |
940 | serge | 1335 | |
1336 | mov ebx, [CURRENT_TASK] |
||
1337 | shl ebx, 5 |
||
1338 | mov ebx, [CURRENT_TASK+ebx+4] |
||
943 | serge | 1339 | mov eax, SMAP.sizeof |
940 | serge | 1340 | |
1341 | call create_kernel_object |
||
1342 | test eax, eax |
||
1343 | mov edi, eax |
||
1344 | mov edx, E_NOMEM |
||
1213 | serge | 1345 | jz .fail |
940 | serge | 1346 | |
1213 | serge | 1347 | inc [esi+SMEM.refcount] |
1348 | |||
943 | serge | 1349 | mov [edi+SMAP.magic], 'SMAP' |
1350 | mov [edi+SMAP.destroy], destroy_smap |
||
1213 | serge | 1351 | mov [edi+SMAP.parent], esi |
943 | serge | 1352 | mov [edi+SMAP.base], 0 |
940 | serge | 1353 | |
943 | serge | 1354 | stdcall user_alloc, [esi+SMEM.size] |
940 | serge | 1355 | test eax, eax |
1356 | mov [mapped], eax |
||
1357 | mov edx, E_NOMEM |
||
1358 | jz .cleanup2 |
||
1359 | |||
943 | serge | 1360 | mov [edi+SMAP.base], eax |
940 | serge | 1361 | |
943 | serge | 1362 | mov ecx, [esi+SMEM.size] |
940 | serge | 1363 | mov [size], ecx |
1364 | |||
1365 | shr ecx, 12 |
||
1366 | shr eax, 10 |
||
1367 | |||
943 | serge | 1368 | mov esi, [esi+SMEM.base] |
940 | serge | 1369 | shr esi, 10 |
1370 | lea edi, [page_tabs+eax] |
||
1371 | add esi, page_tabs |
||
1372 | |||
1373 | mov edx, [access] |
||
1374 | or edx, [owner_access] |
||
1375 | shl edx, 1 |
||
1376 | or edx, PG_USER+PG_SHARED |
||
1377 | @@: |
||
1378 | lodsd |
||
1379 | and eax, 0xFFFFF000 |
||
1380 | or eax, edx |
||
1381 | stosd |
||
1382 | loop @B |
||
1383 | |||
1384 | xor edx, edx |
||
1385 | |||
1386 | cmp [owner_access], 0 |
||
1213 | serge | 1387 | jne .fail |
1388 | .exit: |
||
940 | serge | 1389 | mov edx, [size] |
1213 | serge | 1390 | .fail: |
940 | serge | 1391 | mov eax, [mapped] |
1392 | |||
1393 | popfd |
||
1394 | pop edi |
||
1395 | pop esi |
||
1396 | pop ebx |
||
1397 | ret |
||
1398 | .cleanup: |
||
1213 | serge | 1399 | mov [size], edx |
940 | serge | 1400 | mov eax, esi |
1401 | call free |
||
1402 | jmp .exit |
||
1403 | |||
1404 | .cleanup2: |
||
1213 | serge | 1405 | mov [size], edx |
940 | serge | 1406 | mov eax, edi |
1407 | call destroy_smap |
||
1408 | jmp .exit |
||
1409 | endp |
||
943 | serge | 1410 | |
1411 | align 4 |
||
1412 | proc shmem_close stdcall, name:dword |
||
1413 | |||
1414 | mov eax, [name] |
||
1415 | test eax, eax |
||
1416 | jz .fail |
||
1417 | |||
1418 | push esi |
||
1419 | push edi |
||
945 | serge | 1420 | pushfd |
1421 | cli |
||
943 | serge | 1422 | |
1423 | mov esi, [current_slot] |
||
1424 | add esi, APP_OBJ_OFFSET |
||
1425 | .next: |
||
1426 | mov eax, [esi+APPOBJ.fd] |
||
1427 | test eax, eax |
||
1428 | jz @F |
||
1429 | |||
1430 | cmp eax, esi |
||
1431 | mov esi, eax |
||
1432 | je @F |
||
1433 | |||
1434 | cmp [eax+SMAP.magic], 'SMAP' |
||
1435 | jne .next |
||
1436 | |||
1437 | mov edi, [eax+SMAP.parent] |
||
1438 | test edi, edi |
||
1439 | jz .next |
||
1440 | |||
1501 | mario79 | 1441 | lea edi, [edi+SMEM.name] |
943 | serge | 1442 | stdcall strncmp, [name], edi, 32 |
1443 | test eax, eax |
||
1444 | jne .next |
||
1445 | |||
945 | serge | 1446 | stdcall user_free, [esi+SMAP.base] |
1447 | |||
1501 | mario79 | 1448 | mov eax,esi |
943 | serge | 1449 | call [esi+APPOBJ.destroy] |
1450 | @@: |
||
945 | serge | 1451 | popfd |
943 | serge | 1452 | pop edi |
1453 | pop esi |
||
1454 | .fail: |
||
1455 | ret |
||
1456 | endp=> |