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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: 1501 $ |
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 | |||
1130 | diamond | 94 | mov ecx, 64 |
164 | serge | 95 | mov edi, mem_block_list |
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 | |||
1090 | diamond | 141 | mov ecx, [pg_data.kernel_pages] |
142 | shl ecx, 12 |
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1332 | diamond | 143 | sub ecx, HEAP_BASE-OS_BASE+4096*MEM_BLOCK_SIZE |
170 | serge | 144 | mov [heap_size], ecx |
145 | mov [heap_free], ecx |
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164 | serge | 146 | mov [ebx+block_size], ecx |
147 | mov [ebx+block_flags], FREE_BLOCK |
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148 | |||
149 | mov [mem_block_mask], eax |
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150 | mov [mem_block_mask+4],0x80000000 |
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151 | |||
152 | mov [mem_block_list+63*4], ebx |
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153 | mov byte [mem_block_map], 0xFC |
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279 | serge | 154 | and [heap_mutex], 0 |
170 | serge | 155 | mov [heap_blocks], 4095 |
1130 | diamond | 156 | mov [free_blocks], 4094 |
164 | serge | 157 | ret |
158 | endp |
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159 | |||
369 | serge | 160 | ; param |
161 | ; eax= required size |
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162 | ; |
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163 | ; retval |
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164 | ; edi= memory block descriptor |
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165 | ; ebx= descriptor index |
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166 | |||
164 | serge | 167 | align 4 |
819 | serge | 168 | get_small_block: |
164 | serge | 169 | mov ecx, eax |
369 | serge | 170 | shr ecx, 12 |
171 | dec ecx |
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172 | cmp ecx, 63 |
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173 | jle .get_index |
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174 | mov ecx, 63 |
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175 | .get_index: |
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176 | lea esi, [mem_block_mask] |
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164 | serge | 177 | xor ebx, ebx |
369 | serge | 178 | or edx, -1 |
164 | serge | 179 | |
180 | cmp ecx, 32 |
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181 | jb .bit_test |
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182 | |||
183 | sub ecx, 32 |
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184 | add ebx, 32 |
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185 | add esi, 4 |
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186 | .bit_test: |
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187 | shl edx, cl |
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369 | serge | 188 | and edx, [esi] |
189 | .find: |
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190 | bsf edi, edx |
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164 | serge | 191 | jz .high_mask |
369 | serge | 192 | add ebx, edi |
193 | mov edi, [mem_block_list+ebx*4] |
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194 | .check_size: |
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195 | cmp eax, [edi+block_size] |
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196 | ja .next |
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164 | serge | 197 | ret |
198 | |||
199 | .high_mask: |
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200 | add esi, 4 |
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369 | serge | 201 | cmp esi, mem_block_mask+8 |
202 | jae .err |
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164 | serge | 203 | add ebx, 32 |
369 | serge | 204 | mov edx, [esi] |
205 | jmp .find |
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206 | .next: |
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207 | mov edi, [edi+list_fd] |
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208 | test edi, edi |
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209 | jnz .check_size |
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210 | .err: |
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211 | xor edi, edi |
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164 | serge | 212 | ret |
213 | |||
214 | align 4 |
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819 | serge | 215 | alloc_mem_block: |
164 | serge | 216 | |
217 | mov ebx, [mem_block_start] |
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218 | mov ecx, [mem_block_end] |
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219 | .l1: |
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220 | bsf eax,[ebx]; |
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221 | jnz found |
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222 | add ebx,4 |
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223 | cmp ebx, ecx |
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224 | jb .l1 |
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225 | xor eax,eax |
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226 | ret |
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227 | |||
228 | found: |
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229 | btr [ebx], eax |
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230 | mov [mem_block_start],ebx |
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231 | sub ebx, mem_block_map |
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254 | serge | 232 | lea eax,[eax+ebx*8] |
164 | serge | 233 | shl eax, 5 |
234 | add eax, [mem_block_arr] |
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170 | serge | 235 | dec [free_blocks] |
164 | serge | 236 | ret |
819 | serge | 237 | align 4 |
238 | free_mem_block: |
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357 | serge | 239 | mov dword [eax], 0 |
240 | mov dword [eax+4], 0 |
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241 | mov dword [eax+8], 0 |
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242 | mov dword [eax+12], 0 |
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243 | mov dword [eax+16], 0 |
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244 | ; mov dword [eax+20], 0 |
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245 | mov dword [eax+24], 0 |
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246 | mov dword [eax+28], 0 |
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247 | |||
164 | serge | 248 | sub eax, [mem_block_arr] |
249 | shr eax, 5 |
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250 | |||
251 | mov ebx, mem_block_map |
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252 | bts [ebx], eax |
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170 | serge | 253 | inc [free_blocks] |
164 | serge | 254 | shr eax, 3 |
255 | and eax, not 3 |
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256 | add eax, ebx |
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257 | cmp [mem_block_start], eax |
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258 | ja @f |
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259 | ret |
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260 | @@: |
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261 | mov [mem_block_start], eax |
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262 | ret |
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263 | .err: |
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264 | xor eax, eax |
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265 | ret |
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266 | |||
267 | align 4 |
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268 | proc alloc_kernel_space stdcall, size:dword |
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269 | local block_ind:DWORD |
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270 | |||
660 | serge | 271 | push ebx |
272 | push esi |
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273 | push edi |
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274 | |||
164 | serge | 275 | mov eax, [size] |
206 | serge | 276 | add eax, 4095 |
277 | and eax, not 4095 |
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164 | serge | 278 | mov [size], eax |
279 | serge | 279 | |
280 | mov ebx, heap_mutex |
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281 | call wait_mutex ;ebx |
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282 | |||
170 | serge | 283 | cmp eax, [heap_free] |
284 | ja .error |
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164 | serge | 285 | |
819 | serge | 286 | call get_small_block ; eax |
369 | serge | 287 | test edi, edi |
164 | serge | 288 | jz .error |
289 | |||
290 | cmp [edi+block_flags], FREE_BLOCK |
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291 | jne .error |
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292 | |||
293 | mov [block_ind], ebx ;index of allocated block |
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294 | |||
295 | mov eax, [edi+block_size] |
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296 | cmp eax, [size] |
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297 | je .m_eq_size |
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298 | |||
299 | call alloc_mem_block |
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300 | and eax, eax |
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301 | jz .error |
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302 | |||
303 | mov esi, eax ;esi - splitted block |
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304 | |||
305 | mov [esi+block_next], edi |
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306 | mov eax, [edi+block_prev] |
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307 | mov [esi+block_prev], eax |
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308 | mov [edi+block_prev], esi |
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357 | serge | 309 | mov [esi+list_fd], 0 |
310 | mov [esi+list_bk], 0 |
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164 | serge | 311 | and eax, eax |
312 | jz @f |
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313 | mov [eax+block_next], esi |
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314 | @@: |
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315 | mov ebx, [edi+block_base] |
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316 | mov [esi+block_base], ebx |
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317 | mov edx, [size] |
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318 | mov [esi+block_size], edx |
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319 | add [edi+block_base], edx |
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320 | sub [edi+block_size], edx |
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321 | |||
322 | mov eax, [edi+block_size] |
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323 | shr eax, 12 |
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324 | sub eax, 1 |
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325 | cmp eax, 63 |
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326 | jna @f |
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327 | mov eax, 63 |
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328 | @@: |
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329 | cmp eax, [block_ind] |
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330 | je .m_eq_ind |
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331 | |||
192 | serge | 332 | remove_from_list edi |
164 | serge | 333 | |
334 | mov ecx, [block_ind] |
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211 | serge | 335 | mov [mem_block_list+ecx*4], edx |
164 | serge | 336 | |
211 | serge | 337 | test edx, edx |
164 | serge | 338 | jnz @f |
339 | btr [mem_block_mask], ecx |
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340 | @@: |
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341 | mov edx, [mem_block_list+eax*4] |
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357 | serge | 342 | mov [edi+list_fd], edx |
164 | serge | 343 | test edx, edx |
344 | jz @f |
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357 | serge | 345 | mov [edx+list_bk], edi |
164 | serge | 346 | @@: |
347 | mov [mem_block_list+eax*4], edi |
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348 | bts [mem_block_mask], eax |
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349 | .m_eq_ind: |
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357 | serge | 350 | mov ecx, mem_used.fd-MEM_LIST_OFFSET |
351 | mov edx, [ecx+list_fd] |
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352 | mov [esi+list_fd], edx |
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353 | mov [esi+list_bk], ecx |
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354 | mov [ecx+list_fd], esi |
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355 | mov [edx+list_bk], esi |
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356 | |||
164 | serge | 357 | mov [esi+block_flags], USED_BLOCK |
358 | mov eax, [esi+block_base] |
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170 | serge | 359 | mov ebx, [size] |
360 | sub [heap_free], ebx |
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279 | serge | 361 | and [heap_mutex], 0 |
660 | serge | 362 | pop edi |
363 | pop esi |
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364 | pop ebx |
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164 | serge | 365 | ret |
366 | .m_eq_size: |
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367 | remove_from_list edi |
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192 | serge | 368 | mov [mem_block_list+ebx*4], edx |
164 | serge | 369 | and edx, edx |
370 | jnz @f |
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192 | serge | 371 | btr [mem_block_mask], ebx |
164 | serge | 372 | @@: |
357 | serge | 373 | mov ecx, mem_used.fd-MEM_LIST_OFFSET |
374 | mov edx, [ecx+list_fd] |
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375 | mov [edi+list_fd], edx |
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376 | mov [edi+list_bk], ecx |
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377 | mov [ecx+list_fd], edi |
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378 | mov [edx+list_bk], edi |
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379 | |||
164 | serge | 380 | mov [edi+block_flags], USED_BLOCK |
381 | mov eax, [edi+block_base] |
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170 | serge | 382 | mov ebx, [size] |
383 | sub [heap_free], ebx |
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279 | serge | 384 | and [heap_mutex], 0 |
660 | serge | 385 | pop edi |
386 | pop esi |
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387 | pop ebx |
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164 | serge | 388 | ret |
389 | .error: |
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390 | xor eax, eax |
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279 | serge | 391 | mov [heap_mutex], eax |
660 | serge | 392 | pop edi |
393 | pop esi |
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394 | pop ebx |
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164 | serge | 395 | ret |
396 | endp |
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397 | |||
398 | align 4 |
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321 | diamond | 399 | proc free_kernel_space stdcall uses ebx ecx edx esi edi, base:dword |
660 | serge | 400 | push ebx |
401 | push esi |
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402 | push edi |
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279 | serge | 403 | mov ebx, heap_mutex |
404 | call wait_mutex ;ebx |
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405 | |||
164 | serge | 406 | mov eax, [base] |
357 | serge | 407 | mov esi, [mem_used.fd] |
164 | serge | 408 | @@: |
357 | serge | 409 | cmp esi, mem_used.fd-MEM_LIST_OFFSET |
410 | je .fail |
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164 | serge | 411 | |
412 | cmp [esi+block_base], eax |
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413 | je .found |
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357 | serge | 414 | mov esi, [esi+list_fd] |
164 | serge | 415 | jmp @b |
416 | .found: |
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417 | cmp [esi+block_flags], USED_BLOCK |
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418 | jne .fail |
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419 | |||
170 | serge | 420 | mov eax, [esi+block_size] |
421 | add [heap_free], eax |
||
422 | |||
164 | serge | 423 | mov edi, [esi+block_next] |
424 | test edi, edi |
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425 | jz .prev |
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426 | |||
427 | cmp [edi+block_flags], FREE_BLOCK |
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428 | jne .prev |
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429 | |||
430 | remove_from_free edi |
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431 | |||
432 | mov edx, [edi+block_next] |
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433 | mov [esi+block_next], edx |
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434 | test edx, edx |
||
435 | jz @f |
||
436 | |||
437 | mov [edx+block_prev], esi |
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438 | @@: |
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439 | mov ecx, [edi+block_size] |
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440 | add [esi+block_size], ecx |
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441 | |||
442 | mov eax, edi |
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443 | call free_mem_block |
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444 | .prev: |
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445 | mov edi, [esi+block_prev] |
||
446 | test edi, edi |
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447 | jz .insert |
||
448 | |||
449 | cmp [edi+block_flags], FREE_BLOCK |
||
450 | jne .insert |
||
451 | |||
452 | remove_from_used esi |
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453 | |||
454 | mov edx, [esi+block_next] |
||
455 | mov [edi+block_next], edx |
||
456 | test edx, edx |
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457 | jz @f |
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458 | mov [edx+block_prev], edi |
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459 | @@: |
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460 | mov eax, esi |
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461 | call free_mem_block |
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462 | |||
463 | mov ecx, [edi+block_size] |
||
464 | mov eax, [esi+block_size] |
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465 | add eax, ecx |
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466 | mov [edi+block_size], eax |
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467 | |||
468 | calc_index eax |
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469 | calc_index ecx |
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470 | cmp eax, ecx |
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471 | je .m_eq |
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472 | |||
473 | push ecx |
||
474 | remove_from_list edi |
||
475 | pop ecx |
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476 | |||
477 | cmp [mem_block_list+ecx*4], edi |
||
478 | jne @f |
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479 | mov [mem_block_list+ecx*4], edx |
||
480 | @@: |
||
481 | cmp [mem_block_list+ecx*4], 0 |
||
482 | jne @f |
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483 | btr [mem_block_mask], ecx |
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484 | @@: |
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485 | mov esi, [mem_block_list+eax*4] |
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486 | mov [mem_block_list+eax*4], edi |
||
357 | serge | 487 | mov [edi+list_fd], esi |
164 | serge | 488 | test esi, esi |
489 | jz @f |
||
357 | serge | 490 | mov [esi+list_bk], edi |
164 | serge | 491 | @@: |
492 | bts [mem_block_mask], eax |
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493 | .m_eq: |
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494 | xor eax, eax |
||
279 | serge | 495 | mov [heap_mutex], eax |
321 | diamond | 496 | dec eax |
660 | serge | 497 | pop edi |
498 | pop esi |
||
499 | pop ebx |
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164 | serge | 500 | ret |
501 | .insert: |
||
502 | remove_from_used esi |
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503 | |||
504 | mov eax, [esi+block_size] |
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505 | calc_index eax |
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506 | |||
507 | mov edi, [mem_block_list+eax*4] |
||
508 | mov [mem_block_list+eax*4], esi |
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357 | serge | 509 | mov [esi+list_fd], edi |
164 | serge | 510 | test edi, edi |
511 | jz @f |
||
357 | serge | 512 | mov [edi+list_bk], esi |
164 | serge | 513 | @@: |
514 | bts [mem_block_mask], eax |
||
515 | mov [esi+block_flags],FREE_BLOCK |
||
516 | xor eax, eax |
||
279 | serge | 517 | mov [heap_mutex], eax |
321 | diamond | 518 | dec eax |
660 | serge | 519 | pop edi |
520 | pop esi |
||
521 | pop ebx |
||
164 | serge | 522 | ret |
523 | .fail: |
||
524 | xor eax, eax |
||
279 | serge | 525 | mov [heap_mutex], eax |
660 | serge | 526 | pop edi |
527 | pop esi |
||
528 | pop ebx |
||
164 | serge | 529 | ret |
530 | endp |
||
531 | |||
532 | align 4 |
||
533 | proc kernel_alloc stdcall, size:dword |
||
534 | locals |
||
535 | lin_addr dd ? |
||
536 | pages_count dd ? |
||
537 | endl |
||
538 | |||
662 | serge | 539 | push ebx |
540 | push edi |
||
541 | |||
164 | serge | 542 | mov eax, [size] |
206 | serge | 543 | add eax, 4095 |
544 | and eax, not 4095; |
||
164 | serge | 545 | mov [size], eax |
546 | and eax, eax |
||
357 | serge | 547 | jz .err |
164 | serge | 548 | mov ebx, eax |
549 | shr ebx, 12 |
||
550 | mov [pages_count], ebx |
||
551 | |||
552 | stdcall alloc_kernel_space, eax |
||
357 | serge | 553 | test eax, eax |
554 | jz .err |
||
164 | serge | 555 | mov [lin_addr], eax |
556 | |||
557 | mov ecx, [pages_count] |
||
558 | mov edx, eax |
||
559 | mov ebx, ecx |
||
560 | |||
561 | shr ecx, 3 |
||
562 | jz .next |
||
563 | |||
564 | and ebx, not 7 |
||
565 | push ebx |
||
566 | stdcall alloc_pages, ebx |
||
567 | pop ecx ; yes ecx!!! |
||
568 | and eax, eax |
||
357 | serge | 569 | jz .err |
164 | serge | 570 | |
571 | mov edi, eax |
||
572 | mov edx, [lin_addr] |
||
573 | @@: |
||
574 | stdcall map_page,edx,edi,dword PG_SW |
||
575 | add edx, 0x1000 |
||
576 | add edi, 0x1000 |
||
577 | dec ecx |
||
578 | jnz @B |
||
579 | .next: |
||
580 | mov ecx, [pages_count] |
||
581 | and ecx, 7 |
||
582 | jz .end |
||
357 | serge | 583 | @@: |
584 | push ecx |
||
164 | serge | 585 | call alloc_page |
586 | pop ecx |
||
587 | test eax, eax |
||
357 | serge | 588 | jz .err |
164 | serge | 589 | |
590 | stdcall map_page,edx,eax,dword PG_SW |
||
591 | add edx, 0x1000 |
||
592 | dec ecx |
||
593 | jnz @B |
||
594 | .end: |
||
595 | mov eax, [lin_addr] |
||
662 | serge | 596 | pop edi |
597 | pop ebx |
||
164 | serge | 598 | ret |
357 | serge | 599 | .err: |
164 | serge | 600 | xor eax, eax |
662 | serge | 601 | pop edi |
602 | pop ebx |
||
164 | serge | 603 | ret |
604 | endp |
||
605 | |||
606 | align 4 |
||
607 | proc kernel_free stdcall, base:dword |
||
321 | diamond | 608 | push ebx esi |
164 | serge | 609 | |
279 | serge | 610 | mov ebx, heap_mutex |
611 | call wait_mutex ;ebx |
||
612 | |||
164 | serge | 613 | mov eax, [base] |
357 | serge | 614 | mov esi, [mem_used.fd] |
164 | serge | 615 | @@: |
357 | serge | 616 | cmp esi, mem_used.fd-MEM_LIST_OFFSET |
617 | je .fail |
||
164 | serge | 618 | |
619 | cmp [esi+block_base], eax |
||
620 | je .found |
||
357 | serge | 621 | mov esi, [esi+list_fd] |
164 | serge | 622 | jmp @b |
623 | .found: |
||
624 | cmp [esi+block_flags], USED_BLOCK |
||
625 | jne .fail |
||
626 | |||
279 | serge | 627 | and [heap_mutex], 0 |
628 | |||
321 | diamond | 629 | push ecx |
164 | serge | 630 | mov ecx, [esi+block_size]; |
281 | serge | 631 | shr ecx, 12 |
279 | serge | 632 | call release_pages ;eax, ecx |
321 | diamond | 633 | pop ecx |
164 | serge | 634 | stdcall free_kernel_space, [base] |
321 | diamond | 635 | pop esi ebx |
279 | serge | 636 | ret |
164 | serge | 637 | .fail: |
279 | serge | 638 | and [heap_mutex], 0 |
321 | diamond | 639 | pop esi ebx |
164 | serge | 640 | ret |
641 | endp |
||
642 | |||
643 | restore block_next |
||
644 | restore block_prev |
||
645 | restore block_list |
||
646 | restore block_base |
||
647 | restore block_size |
||
648 | restore block_flags |
||
649 | |||
650 | ;;;;;;;;;;;;;; USER ;;;;;;;;;;;;;;;;; |
||
651 | |||
188 | serge | 652 | HEAP_TOP equ 0x5FC00000 |
653 | |||
164 | serge | 654 | align 4 |
188 | serge | 655 | proc init_heap |
164 | serge | 656 | |
465 | serge | 657 | mov ebx,[current_slot] |
658 | mov eax, [ebx+APPDATA.heap_top] |
||
172 | serge | 659 | test eax, eax |
660 | jz @F |
||
465 | serge | 661 | sub eax,[ebx+APPDATA.heap_base] |
172 | serge | 662 | sub eax, 4096 |
663 | ret |
||
664 | @@: |
||
465 | serge | 665 | mov esi, [ebx+APPDATA.mem_size] |
188 | serge | 666 | add esi, 4095 |
667 | and esi, not 4095 |
||
465 | serge | 668 | mov [ebx+APPDATA.mem_size], esi |
188 | serge | 669 | mov eax, HEAP_TOP |
465 | serge | 670 | mov [ebx+APPDATA.heap_base], esi |
671 | mov [ebx+APPDATA.heap_top], eax |
||
164 | serge | 672 | |
188 | serge | 673 | sub eax, esi |
674 | shr esi, 10 |
||
675 | mov ecx, eax |
||
164 | serge | 676 | sub eax, 4096 |
188 | serge | 677 | or ecx, FREE_BLOCK |
365 | serge | 678 | mov [page_tabs+esi], ecx |
164 | serge | 679 | ret |
680 | endp |
||
681 | |||
682 | align 4 |
||
683 | proc user_alloc stdcall, alloc_size:dword |
||
684 | |||
662 | serge | 685 | push ebx |
686 | push esi |
||
687 | push edi |
||
688 | |||
164 | serge | 689 | mov ecx, [alloc_size] |
690 | add ecx, (4095+4096) |
||
691 | and ecx, not 4095 |
||
692 | |||
465 | serge | 693 | mov ebx, [current_slot] |
694 | mov esi, dword [ebx+APPDATA.heap_base] ; heap_base |
||
695 | mov edi, dword [ebx+APPDATA.heap_top] ; heap_top |
||
164 | serge | 696 | l_0: |
697 | cmp esi, edi |
||
698 | jae m_exit |
||
699 | |||
700 | mov ebx, esi |
||
701 | shr ebx, 12 |
||
365 | serge | 702 | mov eax, [page_tabs+ebx*4] |
620 | diamond | 703 | test al, FREE_BLOCK |
164 | serge | 704 | jz test_used |
705 | and eax, 0xFFFFF000 |
||
706 | cmp eax, ecx ;alloc_size |
||
707 | jb m_next |
||
940 | serge | 708 | jz @f |
164 | serge | 709 | |
620 | diamond | 710 | lea edx, [esi+ecx] |
711 | sub eax, ecx |
||
712 | or al, FREE_BLOCK |
||
164 | serge | 713 | shr edx, 12 |
365 | serge | 714 | mov [page_tabs+edx*4], eax |
294 | diamond | 715 | @@: |
164 | serge | 716 | or ecx, USED_BLOCK |
365 | serge | 717 | mov [page_tabs+ebx*4], ecx |
164 | serge | 718 | shr ecx, 12 |
620 | diamond | 719 | inc ebx |
164 | serge | 720 | dec ecx |
620 | diamond | 721 | jz .no |
164 | serge | 722 | @@: |
365 | serge | 723 | mov dword [page_tabs+ebx*4], 2 |
164 | serge | 724 | inc ebx |
725 | dec ecx |
||
726 | jnz @B |
||
620 | diamond | 727 | .no: |
164 | serge | 728 | |
465 | serge | 729 | mov edx, [current_slot] |
730 | mov ebx, [alloc_size] |
||
731 | add ebx, 0xFFF |
||
732 | and ebx, not 0xFFF |
||
733 | add ebx, [edx+APPDATA.mem_size] |
||
734 | call update_mem_size |
||
294 | diamond | 735 | |
620 | diamond | 736 | lea eax, [esi+4096] |
662 | serge | 737 | |
738 | pop edi |
||
739 | pop esi |
||
740 | pop ebx |
||
164 | serge | 741 | ret |
742 | test_used: |
||
620 | diamond | 743 | test al, USED_BLOCK |
164 | serge | 744 | jz m_exit |
745 | |||
746 | and eax, 0xFFFFF000 |
||
620 | diamond | 747 | m_next: |
164 | serge | 748 | add esi, eax |
749 | jmp l_0 |
||
750 | m_exit: |
||
751 | xor eax, eax |
||
662 | serge | 752 | pop edi |
753 | pop esi |
||
754 | pop ebx |
||
164 | serge | 755 | ret |
756 | endp |
||
757 | |||
758 | align 4 |
||
1289 | diamond | 759 | proc user_alloc_at stdcall, address:dword, alloc_size:dword |
760 | |||
761 | push ebx |
||
762 | push esi |
||
763 | push edi |
||
764 | |||
765 | mov ebx, [current_slot] |
||
766 | mov edx, [address] |
||
767 | and edx, not 0xFFF |
||
768 | mov [address], edx |
||
769 | sub edx, 0x1000 |
||
770 | jb .error |
||
771 | mov esi, [ebx+APPDATA.heap_base] |
||
772 | mov edi, [ebx+APPDATA.heap_top] |
||
773 | cmp edx, esi |
||
774 | jb .error |
||
775 | .scan: |
||
776 | cmp esi, edi |
||
777 | jae .error |
||
778 | mov ebx, esi |
||
779 | shr ebx, 12 |
||
780 | mov eax, [page_tabs+ebx*4] |
||
781 | mov ecx, eax |
||
782 | and ecx, 0xFFFFF000 |
||
783 | add ecx, esi |
||
784 | cmp edx, ecx |
||
785 | jb .found |
||
786 | mov esi, ecx |
||
787 | jmp .scan |
||
788 | .error: |
||
789 | xor eax, eax |
||
790 | pop edi |
||
791 | pop esi |
||
792 | pop ebx |
||
793 | ret |
||
794 | .found: |
||
795 | test al, FREE_BLOCK |
||
796 | jz .error |
||
797 | mov eax, ecx |
||
798 | sub eax, edx |
||
799 | sub eax, 0x1000 |
||
800 | cmp eax, [alloc_size] |
||
801 | jb .error |
||
802 | |||
803 | ; Here we have 1 big free block which includes requested area. |
||
804 | ; In general, 3 other blocks must be created instead: |
||
805 | ; free at [esi, edx); |
||
806 | ; busy at [edx, edx+0x1000+ALIGN_UP(alloc_size,0x1000)); |
||
807 | ; free at [edx+0x1000+ALIGN_UP(alloc_size,0x1000), ecx) |
||
808 | ; First or third block (or both) may be absent. |
||
809 | mov eax, edx |
||
810 | sub eax, esi |
||
811 | jz .nofirst |
||
812 | or al, FREE_BLOCK |
||
813 | mov [page_tabs+ebx*4], eax |
||
814 | .nofirst: |
||
815 | mov eax, [alloc_size] |
||
816 | add eax, 0x1FFF |
||
817 | and eax, not 0xFFF |
||
818 | mov ebx, edx |
||
819 | add edx, eax |
||
820 | shr ebx, 12 |
||
821 | or al, USED_BLOCK |
||
822 | mov [page_tabs+ebx*4], eax |
||
823 | shr eax, 12 |
||
824 | dec eax |
||
825 | jz .second_nofill |
||
826 | inc ebx |
||
827 | .fill: |
||
828 | mov dword [page_tabs+ebx*4], 2 |
||
829 | inc ebx |
||
830 | dec eax |
||
831 | jnz .fill |
||
832 | .second_nofill: |
||
833 | sub ecx, edx |
||
834 | jz .nothird |
||
835 | or cl, FREE_BLOCK |
||
836 | mov [page_tabs+ebx*4], ecx |
||
837 | .nothird: |
||
838 | |||
839 | mov edx, [current_slot] |
||
840 | mov ebx, [alloc_size] |
||
841 | add ebx, 0xFFF |
||
842 | and ebx, not 0xFFF |
||
843 | add ebx, [edx+APPDATA.mem_size] |
||
844 | call update_mem_size |
||
845 | |||
846 | mov eax, [address] |
||
847 | |||
848 | pop edi |
||
849 | pop esi |
||
850 | pop ebx |
||
851 | ret |
||
852 | endp |
||
853 | |||
854 | align 4 |
||
164 | serge | 855 | proc user_free stdcall, base:dword |
856 | |||
662 | serge | 857 | push esi |
858 | |||
164 | serge | 859 | mov esi, [base] |
860 | test esi, esi |
||
861 | jz .exit |
||
862 | |||
662 | serge | 863 | push ebx |
864 | |||
294 | diamond | 865 | xor ebx, ebx |
164 | serge | 866 | shr esi, 12 |
620 | diamond | 867 | mov eax, [page_tabs+(esi-1)*4] |
546 | diamond | 868 | test al, USED_BLOCK |
620 | diamond | 869 | jz .cantfree |
546 | diamond | 870 | test al, DONT_FREE_BLOCK |
871 | jnz .cantfree |
||
164 | serge | 872 | |
873 | and eax, not 4095 |
||
874 | mov ecx, eax |
||
620 | diamond | 875 | or al, FREE_BLOCK |
876 | mov [page_tabs+(esi-1)*4], eax |
||
164 | serge | 877 | sub ecx, 4096 |
620 | diamond | 878 | mov ebx, ecx |
164 | serge | 879 | shr ecx, 12 |
620 | diamond | 880 | jz .released |
164 | serge | 881 | .release: |
188 | serge | 882 | xor eax, eax |
365 | serge | 883 | xchg eax, [page_tabs+esi*4] |
620 | diamond | 884 | test al, 1 |
188 | serge | 885 | jz @F |
940 | serge | 886 | test eax, PG_SHARED |
887 | jnz @F |
||
164 | serge | 888 | call free_page |
448 | diamond | 889 | mov eax, esi |
890 | shl eax, 12 |
||
891 | invlpg [eax] |
||
188 | serge | 892 | @@: |
164 | serge | 893 | inc esi |
894 | dec ecx |
||
895 | jnz .release |
||
620 | diamond | 896 | .released: |
662 | serge | 897 | push edi |
898 | |||
465 | serge | 899 | mov edx, [current_slot] |
900 | mov esi, dword [edx+APPDATA.heap_base] |
||
901 | mov edi, dword [edx+APPDATA.heap_top] |
||
902 | sub ebx, [edx+APPDATA.mem_size] |
||
294 | diamond | 903 | neg ebx |
904 | call update_mem_size |
||
448 | diamond | 905 | call user_normalize |
662 | serge | 906 | pop edi |
907 | pop ebx |
||
908 | pop esi |
||
448 | diamond | 909 | ret |
910 | .exit: |
||
911 | xor eax, eax |
||
912 | inc eax |
||
662 | serge | 913 | pop esi |
448 | diamond | 914 | ret |
546 | diamond | 915 | .cantfree: |
916 | xor eax, eax |
||
662 | serge | 917 | pop ebx |
918 | pop esi |
||
546 | diamond | 919 | ret |
448 | diamond | 920 | endp |
921 | |||
922 | user_normalize: |
||
923 | ; in: esi=heap_base, edi=heap_top |
||
924 | ; out: eax=0 <=> OK |
||
925 | ; destroys: ebx,edx,esi,edi |
||
164 | serge | 926 | shr esi, 12 |
927 | shr edi, 12 |
||
928 | @@: |
||
365 | serge | 929 | mov eax, [page_tabs+esi*4] |
620 | diamond | 930 | test al, USED_BLOCK |
164 | serge | 931 | jz .test_free |
932 | shr eax, 12 |
||
933 | add esi, eax |
||
934 | jmp @B |
||
935 | .test_free: |
||
620 | diamond | 936 | test al, FREE_BLOCK |
164 | serge | 937 | jz .err |
938 | mov edx, eax |
||
939 | shr edx, 12 |
||
940 | add edx, esi |
||
941 | cmp edx, edi |
||
942 | jae .exit |
||
943 | |||
365 | serge | 944 | mov ebx, [page_tabs+edx*4] |
620 | diamond | 945 | test bl, USED_BLOCK |
164 | serge | 946 | jz .next_free |
947 | |||
948 | shr ebx, 12 |
||
949 | add edx, ebx |
||
950 | mov esi, edx |
||
951 | jmp @B |
||
952 | .next_free: |
||
620 | diamond | 953 | test bl, FREE_BLOCK |
164 | serge | 954 | jz .err |
365 | serge | 955 | and dword [page_tabs+edx*4], 0 |
164 | serge | 956 | add eax, ebx |
957 | and eax, not 4095 |
||
958 | or eax, FREE_BLOCK |
||
365 | serge | 959 | mov [page_tabs+esi*4], eax |
164 | serge | 960 | jmp @B |
961 | .exit: |
||
962 | xor eax, eax |
||
963 | inc eax |
||
964 | ret |
||
965 | .err: |
||
966 | xor eax, eax |
||
967 | ret |
||
968 | |||
448 | diamond | 969 | user_realloc: |
970 | ; in: eax = pointer, ebx = new size |
||
971 | ; out: eax = new pointer or NULL |
||
972 | test eax, eax |
||
973 | jnz @f |
||
974 | ; realloc(NULL,sz) - same as malloc(sz) |
||
975 | push ebx |
||
976 | call user_alloc |
||
977 | ret |
||
978 | @@: |
||
979 | push ecx edx |
||
465 | serge | 980 | lea ecx, [eax - 0x1000] |
448 | diamond | 981 | shr ecx, 12 |
982 | mov edx, [page_tabs+ecx*4] |
||
620 | diamond | 983 | test dl, USED_BLOCK |
448 | diamond | 984 | jnz @f |
985 | ; attempt to realloc invalid pointer |
||
986 | .ret0: |
||
987 | pop edx ecx |
||
988 | xor eax, eax |
||
989 | ret |
||
990 | @@: |
||
620 | diamond | 991 | test dl, DONT_FREE_BLOCK |
546 | diamond | 992 | jnz .ret0 |
448 | diamond | 993 | add ebx, 0x1FFF |
994 | shr edx, 12 |
||
995 | shr ebx, 12 |
||
996 | ; edx = allocated size, ebx = new size |
||
997 | add edx, ecx |
||
998 | add ebx, ecx |
||
999 | cmp edx, ebx |
||
1000 | jb .realloc_add |
||
1001 | ; release part of allocated memory |
||
1002 | .loop: |
||
1003 | cmp edx, ebx |
||
1004 | jz .release_done |
||
1005 | dec edx |
||
1006 | xor eax, eax |
||
1007 | xchg eax, [page_tabs+edx*4] |
||
1008 | test al, 1 |
||
1009 | jz .loop |
||
1010 | call free_page |
||
1011 | mov eax, edx |
||
1012 | shl eax, 12 |
||
1013 | invlpg [eax] |
||
1014 | jmp .loop |
||
1015 | .release_done: |
||
1016 | sub ebx, ecx |
||
1017 | cmp ebx, 1 |
||
1018 | jnz .nofreeall |
||
1019 | mov eax, [page_tabs+ecx*4] |
||
1020 | and eax, not 0xFFF |
||
465 | serge | 1021 | mov edx, [current_slot] |
1022 | mov ebx, [APPDATA.mem_size+edx] |
||
448 | diamond | 1023 | sub ebx, eax |
1024 | add ebx, 0x1000 |
||
1025 | or al, FREE_BLOCK |
||
1026 | mov [page_tabs+ecx*4], eax |
||
1027 | push esi edi |
||
465 | serge | 1028 | mov esi, [APPDATA.heap_base+edx] |
1029 | mov edi, [APPDATA.heap_top+edx] |
||
448 | diamond | 1030 | call update_mem_size |
1031 | call user_normalize |
||
1032 | pop edi esi |
||
1033 | jmp .ret0 ; all freed |
||
1034 | .nofreeall: |
||
1035 | sub edx, ecx |
||
1036 | shl ebx, 12 |
||
1037 | or ebx, USED_BLOCK |
||
1038 | xchg [page_tabs+ecx*4], ebx |
||
1039 | shr ebx, 12 |
||
1040 | sub ebx, edx |
||
1041 | push ebx ecx edx |
||
465 | serge | 1042 | mov edx, [current_slot] |
448 | diamond | 1043 | shl ebx, 12 |
465 | serge | 1044 | sub ebx, [APPDATA.mem_size+edx] |
448 | diamond | 1045 | neg ebx |
1046 | call update_mem_size |
||
1047 | pop edx ecx ebx |
||
465 | serge | 1048 | lea eax, [ecx+1] |
448 | diamond | 1049 | shl eax, 12 |
1050 | push eax |
||
823 | diamond | 1051 | add ecx, edx |
1052 | lea edx, [ecx+ebx] |
||
448 | diamond | 1053 | shl ebx, 12 |
1054 | jz .ret |
||
1055 | push esi |
||
465 | serge | 1056 | mov esi, [current_slot] |
1057 | mov esi, [APPDATA.heap_top+esi] |
||
448 | diamond | 1058 | shr esi, 12 |
1059 | @@: |
||
1060 | cmp edx, esi |
||
1061 | jae .merge_done |
||
1062 | mov eax, [page_tabs+edx*4] |
||
1063 | test al, USED_BLOCK |
||
823 | diamond | 1064 | jnz .merge_done |
448 | diamond | 1065 | and dword [page_tabs+edx*4], 0 |
823 | diamond | 1066 | shr eax, 12 |
1067 | add edx, eax |
||
1068 | shl eax, 12 |
||
448 | diamond | 1069 | add ebx, eax |
1070 | jmp @b |
||
1071 | .merge_done: |
||
1072 | pop esi |
||
1073 | or ebx, FREE_BLOCK |
||
1074 | mov [page_tabs+ecx*4], ebx |
||
1075 | .ret: |
||
1076 | pop eax edx ecx |
||
1077 | ret |
||
1078 | .realloc_add: |
||
1079 | ; get some additional memory |
||
465 | serge | 1080 | mov eax, [current_slot] |
1081 | mov eax, [APPDATA.heap_top+eax] |
||
448 | diamond | 1082 | shr eax, 12 |
1083 | cmp edx, eax |
||
1084 | jae .cant_inplace |
||
1085 | mov eax, [page_tabs+edx*4] |
||
620 | diamond | 1086 | test al, FREE_BLOCK |
1087 | jz .cant_inplace |
||
448 | diamond | 1088 | shr eax, 12 |
1089 | add eax, edx |
||
620 | diamond | 1090 | sub eax, ebx |
448 | diamond | 1091 | jb .cant_inplace |
1092 | jz @f |
||
1093 | shl eax, 12 |
||
1094 | or al, FREE_BLOCK |
||
1095 | mov [page_tabs+ebx*4], eax |
||
1096 | @@: |
||
1097 | mov eax, ebx |
||
1098 | sub eax, ecx |
||
1099 | shl eax, 12 |
||
1100 | or al, USED_BLOCK |
||
1101 | mov [page_tabs+ecx*4], eax |
||
465 | serge | 1102 | lea eax, [ecx+1] |
448 | diamond | 1103 | shl eax, 12 |
1104 | push eax |
||
1105 | push edi |
||
1106 | lea edi, [page_tabs+edx*4] |
||
1107 | mov eax, 2 |
||
1108 | sub ebx, edx |
||
1109 | mov ecx, ebx |
||
1110 | cld |
||
1111 | rep stosd |
||
1112 | pop edi |
||
465 | serge | 1113 | mov edx, [current_slot] |
448 | diamond | 1114 | shl ebx, 12 |
465 | serge | 1115 | add ebx, [APPDATA.mem_size+edx] |
448 | diamond | 1116 | call update_mem_size |
1117 | pop eax edx ecx |
||
1118 | ret |
||
1119 | .cant_inplace: |
||
1120 | push esi edi |
||
465 | serge | 1121 | mov eax, [current_slot] |
1122 | mov esi, [APPDATA.heap_base+eax] |
||
1123 | mov edi, [APPDATA.heap_top+eax] |
||
448 | diamond | 1124 | shr esi, 12 |
1125 | shr edi, 12 |
||
1126 | sub ebx, ecx |
||
1127 | .find_place: |
||
1128 | cmp esi, edi |
||
1129 | jae .place_not_found |
||
1130 | mov eax, [page_tabs+esi*4] |
||
1131 | test al, FREE_BLOCK |
||
1132 | jz .next_place |
||
1133 | shr eax, 12 |
||
1134 | cmp eax, ebx |
||
1135 | jae .place_found |
||
1136 | add esi, eax |
||
1137 | jmp .find_place |
||
1138 | .next_place: |
||
1139 | shr eax, 12 |
||
1140 | add esi, eax |
||
1141 | jmp .find_place |
||
1142 | .place_not_found: |
||
1143 | pop edi esi |
||
1144 | jmp .ret0 |
||
1145 | .place_found: |
||
1146 | sub eax, ebx |
||
1147 | jz @f |
||
1148 | push esi |
||
620 | diamond | 1149 | add esi, ebx |
448 | diamond | 1150 | shl eax, 12 |
1151 | or al, FREE_BLOCK |
||
1152 | mov [page_tabs+esi*4], eax |
||
1153 | pop esi |
||
1154 | @@: |
||
1155 | mov eax, ebx |
||
1156 | shl eax, 12 |
||
1157 | or al, USED_BLOCK |
||
1158 | mov [page_tabs+esi*4], eax |
||
1159 | inc esi |
||
1160 | mov eax, esi |
||
1161 | shl eax, 12 |
||
1162 | push eax |
||
1163 | mov eax, [page_tabs+ecx*4] |
||
1164 | and eax, not 0xFFF |
||
1165 | or al, FREE_BLOCK |
||
1166 | sub edx, ecx |
||
1167 | mov [page_tabs+ecx*4], eax |
||
1168 | inc ecx |
||
620 | diamond | 1169 | dec ebx |
1170 | dec edx |
||
1171 | jz .no |
||
448 | diamond | 1172 | @@: |
1173 | xor eax, eax |
||
1174 | xchg eax, [page_tabs+ecx*4] |
||
1175 | mov [page_tabs+esi*4], eax |
||
940 | serge | 1176 | mov eax, ecx |
1177 | shl eax, 12 |
||
1178 | invlpg [eax] |
||
620 | diamond | 1179 | inc esi |
448 | diamond | 1180 | inc ecx |
1181 | dec ebx |
||
1182 | dec edx |
||
1183 | jnz @b |
||
620 | diamond | 1184 | .no: |
448 | diamond | 1185 | push ebx |
465 | serge | 1186 | mov edx, [current_slot] |
448 | diamond | 1187 | shl ebx, 12 |
465 | serge | 1188 | add ebx, [APPDATA.mem_size+edx] |
448 | diamond | 1189 | call update_mem_size |
1190 | pop ebx |
||
1191 | @@: |
||
1192 | mov dword [page_tabs+esi*4], 2 |
||
1193 | inc esi |
||
1194 | dec ebx |
||
1195 | jnz @b |
||
1196 | pop eax edi esi edx ecx |
||
1197 | ret |
||
1198 | |||
278 | serge | 1199 | if 0 |
164 | serge | 1200 | align 4 |
1201 | proc alloc_dll |
||
1202 | pushf |
||
1203 | cli |
||
1204 | bsf eax, [dll_map] |
||
1205 | jnz .find |
||
1206 | popf |
||
1207 | xor eax, eax |
||
1208 | ret |
||
1209 | .find: |
||
1210 | btr [dll_map], eax |
||
1211 | popf |
||
1212 | shl eax, 5 |
||
1213 | add eax, dll_tab |
||
1214 | ret |
||
1215 | endp |
||
1216 | |||
1217 | align 4 |
||
1218 | proc alloc_service |
||
1219 | pushf |
||
1220 | cli |
||
1221 | bsf eax, [srv_map] |
||
1222 | jnz .find |
||
1223 | popf |
||
1224 | xor eax, eax |
||
1225 | ret |
||
214 | serge | 1226 | .find: |
1227 | btr [srv_map], eax |
||
164 | serge | 1228 | popf |
214 | serge | 1229 | shl eax,0x02 |
1230 | lea eax,[srv_tab+eax+eax*8] ;srv_tab+eax*36 |
||
164 | serge | 1231 | ret |
1232 | endp |
||
278 | serge | 1233 | |
1234 | end if |
||
940 | serge | 1235 | |
1236 | |||
1237 | ;;;;;;;;;;;;;; SHARED ;;;;;;;;;;;;;;;;; |
||
1238 | |||
1239 | |||
1240 | ; param |
||
1241 | ; eax= shm_map object |
||
1242 | |||
1243 | align 4 |
||
1244 | destroy_smap: |
||
1245 | |||
1246 | pushfd |
||
1247 | cli |
||
1248 | |||
945 | serge | 1249 | push esi |
1250 | push edi |
||
940 | serge | 1251 | |
945 | serge | 1252 | mov edi, eax |
1253 | mov esi, [eax+SMAP.parent] |
||
1254 | test esi, esi |
||
1255 | jz .done |
||
940 | serge | 1256 | |
945 | serge | 1257 | lock dec [esi+SMEM.refcount] |
1258 | jnz .done |
||
940 | serge | 1259 | |
945 | serge | 1260 | mov ecx, [esi+SMEM.bk] |
1261 | mov edx, [esi+SMEM.fd] |
||
1262 | |||
1263 | mov [ecx+SMEM.fd], edx |
||
1264 | mov [edx+SMEM.bk], ecx |
||
1265 | |||
1266 | stdcall kernel_free, [esi+SMEM.base] |
||
1267 | mov eax, esi |
||
1268 | call free |
||
1269 | .done: |
||
1270 | mov eax, edi |
||
940 | serge | 1271 | call destroy_kernel_object |
1272 | |||
945 | serge | 1273 | pop edi |
1274 | pop esi |
||
940 | serge | 1275 | popfd |
1276 | |||
1277 | ret |
||
1278 | |||
1279 | E_NOTFOUND equ 5 |
||
1280 | E_ACCESS equ 10 |
||
1281 | E_NOMEM equ 30 |
||
1282 | E_PARAM equ 33 |
||
1283 | |||
1284 | SHM_READ equ 0 |
||
1285 | SHM_WRITE equ 1 |
||
1286 | |||
1287 | SHM_ACCESS_MASK equ 3 |
||
1288 | |||
1289 | SHM_OPEN equ (0 shl 2) |
||
1290 | SHM_OPEN_ALWAYS equ (1 shl 2) |
||
1291 | SHM_CREATE equ (2 shl 2) |
||
1292 | |||
1293 | SHM_OPEN_MASK equ (3 shl 2) |
||
1294 | |||
1295 | align 4 |
||
1296 | proc shmem_open stdcall name:dword, size:dword, access:dword |
||
1297 | locals |
||
1298 | action dd ? |
||
1299 | owner_access dd ? |
||
1300 | mapped dd ? |
||
1301 | endl |
||
1302 | |||
1303 | push ebx |
||
1304 | push esi |
||
1305 | push edi |
||
1306 | |||
1307 | mov [mapped], 0 |
||
1308 | mov [owner_access], 0 |
||
1309 | |||
1310 | pushfd ;mutex required |
||
1311 | cli |
||
1312 | |||
1313 | mov eax, [access] |
||
1314 | and eax, SHM_OPEN_MASK |
||
1315 | mov [action], eax |
||
1316 | |||
1213 | serge | 1317 | mov ebx, [name] |
1318 | test ebx, ebx |
||
940 | serge | 1319 | mov edx, E_PARAM |
1213 | serge | 1320 | jz .fail |
940 | serge | 1321 | |
1322 | mov esi, [shmem_list.fd] |
||
1323 | align 4 |
||
1324 | @@: |
||
1325 | cmp esi, shmem_list |
||
1326 | je .not_found |
||
1327 | |||
943 | serge | 1328 | lea edx, [esi+SMEM.name] ; link , base, size |
1213 | serge | 1329 | stdcall strncmp, edx, ebx, 32 |
940 | serge | 1330 | test eax, eax |
1331 | je .found |
||
1332 | |||
943 | serge | 1333 | mov esi, [esi+SMEM.fd] |
940 | serge | 1334 | jmp @B |
1335 | |||
1336 | .not_found: |
||
1337 | mov eax, [action] |
||
1338 | |||
1339 | cmp eax, SHM_OPEN |
||
1340 | mov edx, E_NOTFOUND |
||
1213 | serge | 1341 | je .fail |
940 | serge | 1342 | |
1343 | cmp eax, SHM_CREATE |
||
1344 | mov edx, E_PARAM |
||
1345 | je .create_shm |
||
1346 | |||
1347 | cmp eax, SHM_OPEN_ALWAYS |
||
1213 | serge | 1348 | jne .fail |
940 | serge | 1349 | |
1350 | .create_shm: |
||
1351 | |||
1352 | mov ecx, [size] |
||
1353 | test ecx, ecx |
||
1213 | serge | 1354 | jz .fail |
940 | serge | 1355 | |
1356 | add ecx, 4095 |
||
1357 | and ecx, -4096 |
||
1358 | mov [size], ecx |
||
1359 | |||
943 | serge | 1360 | mov eax, SMEM.sizeof |
940 | serge | 1361 | call malloc |
1362 | test eax, eax |
||
1363 | mov esi, eax |
||
1364 | mov edx, E_NOMEM |
||
1213 | serge | 1365 | jz .fail |
940 | serge | 1366 | |
1367 | stdcall kernel_alloc, [size] |
||
1368 | test eax, eax |
||
1369 | mov [mapped], eax |
||
1370 | mov edx, E_NOMEM |
||
1371 | jz .cleanup |
||
1372 | |||
1373 | mov ecx, [size] |
||
1374 | mov edx, [access] |
||
1375 | and edx, SHM_ACCESS_MASK |
||
1376 | |||
943 | serge | 1377 | mov [esi+SMEM.base], eax |
1378 | mov [esi+SMEM.size], ecx |
||
1379 | mov [esi+SMEM.access], edx |
||
1380 | mov [esi+SMEM.refcount], 0 |
||
1381 | mov [esi+SMEM.name+28], 0 |
||
940 | serge | 1382 | |
943 | serge | 1383 | lea eax, [esi+SMEM.name] |
940 | serge | 1384 | stdcall strncpy, eax, [name], 31 |
1385 | |||
1386 | mov eax, [shmem_list.fd] |
||
943 | serge | 1387 | mov [esi+SMEM.bk], shmem_list |
1388 | mov [esi+SMEM.fd], eax |
||
940 | serge | 1389 | |
943 | serge | 1390 | mov [eax+SMEM.bk], esi |
940 | serge | 1391 | mov [shmem_list.fd], esi |
1392 | |||
1393 | mov [action], SHM_OPEN |
||
1394 | mov [owner_access], SHM_WRITE |
||
1395 | |||
1396 | .found: |
||
1397 | mov eax, [action] |
||
1398 | |||
1399 | cmp eax, SHM_CREATE |
||
1400 | mov edx, E_ACCESS |
||
1401 | je .exit |
||
1402 | |||
1403 | cmp eax, SHM_OPEN |
||
1404 | mov edx, E_PARAM |
||
1405 | je .create_map |
||
1406 | |||
1407 | cmp eax, SHM_OPEN_ALWAYS |
||
1213 | serge | 1408 | jne .fail |
940 | serge | 1409 | |
1410 | .create_map: |
||
1411 | |||
1412 | mov eax, [access] |
||
1413 | and eax, SHM_ACCESS_MASK |
||
943 | serge | 1414 | cmp eax, [esi+SMEM.access] |
940 | serge | 1415 | mov [access], eax |
1416 | mov edx, E_ACCESS |
||
1213 | serge | 1417 | ja .fail |
940 | serge | 1418 | |
1419 | mov ebx, [CURRENT_TASK] |
||
1420 | shl ebx, 5 |
||
1421 | mov ebx, [CURRENT_TASK+ebx+4] |
||
943 | serge | 1422 | mov eax, SMAP.sizeof |
940 | serge | 1423 | |
1424 | call create_kernel_object |
||
1425 | test eax, eax |
||
1426 | mov edi, eax |
||
1427 | mov edx, E_NOMEM |
||
1213 | serge | 1428 | jz .fail |
940 | serge | 1429 | |
1213 | serge | 1430 | inc [esi+SMEM.refcount] |
1431 | |||
943 | serge | 1432 | mov [edi+SMAP.magic], 'SMAP' |
1433 | mov [edi+SMAP.destroy], destroy_smap |
||
1213 | serge | 1434 | mov [edi+SMAP.parent], esi |
943 | serge | 1435 | mov [edi+SMAP.base], 0 |
940 | serge | 1436 | |
943 | serge | 1437 | stdcall user_alloc, [esi+SMEM.size] |
940 | serge | 1438 | test eax, eax |
1439 | mov [mapped], eax |
||
1440 | mov edx, E_NOMEM |
||
1441 | jz .cleanup2 |
||
1442 | |||
943 | serge | 1443 | mov [edi+SMAP.base], eax |
940 | serge | 1444 | |
943 | serge | 1445 | mov ecx, [esi+SMEM.size] |
940 | serge | 1446 | mov [size], ecx |
1447 | |||
1448 | shr ecx, 12 |
||
1449 | shr eax, 10 |
||
1450 | |||
943 | serge | 1451 | mov esi, [esi+SMEM.base] |
940 | serge | 1452 | shr esi, 10 |
1453 | lea edi, [page_tabs+eax] |
||
1454 | add esi, page_tabs |
||
1455 | |||
1456 | mov edx, [access] |
||
1457 | or edx, [owner_access] |
||
1458 | shl edx, 1 |
||
1459 | or edx, PG_USER+PG_SHARED |
||
1460 | @@: |
||
1461 | lodsd |
||
1462 | and eax, 0xFFFFF000 |
||
1463 | or eax, edx |
||
1464 | stosd |
||
1465 | loop @B |
||
1466 | |||
1467 | xor edx, edx |
||
1468 | |||
1469 | cmp [owner_access], 0 |
||
1213 | serge | 1470 | jne .fail |
1471 | .exit: |
||
940 | serge | 1472 | mov edx, [size] |
1213 | serge | 1473 | .fail: |
940 | serge | 1474 | mov eax, [mapped] |
1475 | |||
1476 | popfd |
||
1477 | pop edi |
||
1478 | pop esi |
||
1479 | pop ebx |
||
1480 | ret |
||
1481 | .cleanup: |
||
1213 | serge | 1482 | mov [size], edx |
940 | serge | 1483 | mov eax, esi |
1484 | call free |
||
1485 | jmp .exit |
||
1486 | |||
1487 | .cleanup2: |
||
1213 | serge | 1488 | mov [size], edx |
940 | serge | 1489 | mov eax, edi |
1490 | call destroy_smap |
||
1491 | jmp .exit |
||
1492 | endp |
||
943 | serge | 1493 | |
1494 | align 4 |
||
1495 | proc shmem_close stdcall, name:dword |
||
1496 | |||
1497 | mov eax, [name] |
||
1498 | test eax, eax |
||
1499 | jz .fail |
||
1500 | |||
1501 | push esi |
||
1502 | push edi |
||
945 | serge | 1503 | pushfd |
1504 | cli |
||
943 | serge | 1505 | |
1506 | mov esi, [current_slot] |
||
1507 | add esi, APP_OBJ_OFFSET |
||
1508 | .next: |
||
1509 | mov eax, [esi+APPOBJ.fd] |
||
1510 | test eax, eax |
||
1511 | jz @F |
||
1512 | |||
1513 | cmp eax, esi |
||
1514 | mov esi, eax |
||
1515 | je @F |
||
1516 | |||
1517 | cmp [eax+SMAP.magic], 'SMAP' |
||
1518 | jne .next |
||
1519 | |||
1520 | mov edi, [eax+SMAP.parent] |
||
1521 | test edi, edi |
||
1522 | jz .next |
||
1523 | |||
1501 | mario79 | 1524 | lea edi, [edi+SMEM.name] |
943 | serge | 1525 | stdcall strncmp, [name], edi, 32 |
1526 | test eax, eax |
||
1527 | jne .next |
||
1528 | |||
945 | serge | 1529 | stdcall user_free, [esi+SMAP.base] |
1530 | |||
1501 | mario79 | 1531 | mov eax,esi |
943 | serge | 1532 | call [esi+APPOBJ.destroy] |
1533 | @@: |
||
945 | serge | 1534 | popfd |
943 | serge | 1535 | pop edi |
1536 | pop esi |
||
1537 | .fail: |
||
1538 | ret |
||
1539 | endp=> |