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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: 2166 $ |
9 | |||
10 | |||
164 | serge | 11 | struc MEM_BLOCK |
2138 | 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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2151 | 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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2138 | 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 | |||
2156 | serge | 49 | align 4 |
50 | md: |
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51 | .add_to_used: |
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52 | mov eax, [esi+block_base] |
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53 | mov ebx, [esi+block_base] |
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54 | shr ebx, 6 |
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55 | add eax, ebx |
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56 | shr ebx, 6 |
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57 | add eax, ebx |
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58 | shr eax, 12 |
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59 | and eax, 63 |
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60 | inc [mem_hash_cnt+eax*4] |
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164 | serge | 61 | |
2156 | serge | 62 | lea ecx, [mem_used_list+eax*8] |
63 | list_add esi, ecx |
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64 | mov [esi+block_flags], USED_BLOCK |
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65 | mov eax, [esi+block_size] |
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66 | sub [heap_free], eax |
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67 | ret |
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68 | align 4 |
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69 | .find_used: |
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70 | mov ecx, eax |
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71 | mov ebx, eax |
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72 | shr ebx, 6 |
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73 | add ecx, ebx |
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74 | shr ebx, 6 |
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75 | add ecx, ebx |
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76 | shr ecx, 12 |
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77 | and ecx, 63 |
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78 | |||
79 | lea ebx, [mem_used_list+ecx*8] |
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80 | mov esi, ebx |
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81 | .next: |
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82 | mov esi, [esi+list_fd] |
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83 | cmp esi, ebx |
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84 | je .fail |
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85 | |||
86 | cmp eax, [esi+block_base] |
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87 | jne .next |
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88 | |||
89 | ret |
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90 | .fail: |
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91 | xor esi, esi |
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92 | ret |
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93 | |||
94 | align 4 |
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95 | .del_from_used: |
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96 | call .find_used |
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97 | test esi, esi |
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98 | jz .done |
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99 | |||
100 | cmp [esi+block_flags], USED_BLOCK |
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101 | jne .fatal |
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102 | |||
103 | dec [mem_hash_cnt+ecx*4] |
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104 | list_del esi |
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105 | .done: |
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106 | ret |
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107 | .fatal: ;FIXME panic here |
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108 | xor esi, esi |
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109 | ret |
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110 | |||
2138 | serge | 111 | ;Initial heap state |
112 | ; |
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2143 | serge | 113 | ;+heap_size terminator USED_BLOCK |
2151 | serge | 114 | ;+4096*MEM_BLOCK.sizeof free space FREE_BLOCK |
2143 | serge | 115 | ;HEAP_BASE heap_descriptors USED_BLOCK |
2138 | serge | 116 | ; |
117 | |||
164 | serge | 118 | align 4 |
119 | proc init_kernel_heap |
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120 | |||
2138 | serge | 121 | mov ecx, 64 |
122 | mov edi, mem_block_list |
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123 | @@: |
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124 | mov eax, edi |
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125 | stosd |
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126 | stosd |
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127 | loop @B |
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164 | serge | 128 | |
2156 | serge | 129 | mov ecx, 64 |
130 | mov edi, mem_used_list |
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131 | @@: |
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132 | mov eax, edi |
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133 | stosd |
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134 | stosd |
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135 | loop @B |
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357 | serge | 136 | |
2138 | serge | 137 | stdcall alloc_pages, dword 32 |
138 | mov ecx, 32 |
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139 | mov edx, eax |
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140 | mov edi, HEAP_BASE |
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164 | serge | 141 | .l1: |
2138 | serge | 142 | stdcall map_page,edi,edx,PG_SW |
143 | add edi, 0x1000 |
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144 | add edx, 0x1000 |
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145 | dec ecx |
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146 | jnz .l1 |
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164 | serge | 147 | |
2138 | serge | 148 | mov edi, HEAP_BASE ;descriptors |
2151 | serge | 149 | mov ebx, HEAP_BASE+MEM_BLOCK.sizeof ;free space |
150 | mov ecx, HEAP_BASE+MEM_BLOCK.sizeof*2 ;terminator |
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164 | serge | 151 | |
2138 | serge | 152 | xor eax, eax |
153 | mov [edi+block_next], ebx |
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154 | mov [edi+block_prev], eax |
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155 | mov [edi+list_fd], eax |
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156 | mov [edi+list_bk], eax |
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157 | mov [edi+block_base], HEAP_BASE |
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2151 | serge | 158 | mov [edi+block_size], 4096*MEM_BLOCK.sizeof |
2138 | serge | 159 | mov [edi+block_flags], USED_BLOCK |
164 | serge | 160 | |
2138 | serge | 161 | mov [ecx+block_next], eax |
162 | mov [ecx+block_prev], ebx |
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163 | mov [edi+list_fd], eax |
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164 | mov [edi+list_bk], eax |
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2151 | serge | 165 | mov [edi+block_base], eax |
166 | mov [edi+block_size], eax |
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2138 | serge | 167 | mov [edi+block_flags], USED_BLOCK |
164 | serge | 168 | |
2138 | serge | 169 | mov [ebx+block_next], ecx |
170 | mov [ebx+block_prev], edi |
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2151 | serge | 171 | mov [ebx+block_base], HEAP_BASE+4096*MEM_BLOCK.sizeof |
164 | serge | 172 | |
2138 | serge | 173 | mov ecx, [pg_data.kernel_pages] |
174 | shl ecx, 12 |
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2151 | serge | 175 | sub ecx, HEAP_BASE-OS_BASE+4096*MEM_BLOCK.sizeof |
2138 | serge | 176 | mov [heap_size], ecx |
177 | mov [heap_free], ecx |
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178 | mov [ebx+block_size], ecx |
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179 | mov [ebx+block_flags], FREE_BLOCK |
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180 | |||
181 | mov [mem_block_mask], eax |
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182 | mov [mem_block_mask+4],0x80000000 |
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183 | |||
184 | mov ecx, mem_block_list+63*8 |
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185 | list_add ebx, ecx |
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186 | |||
2151 | serge | 187 | mov ecx, 4096-3-1 |
188 | mov eax, HEAP_BASE+MEM_BLOCK.sizeof*4 |
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189 | |||
190 | mov [next_memblock], HEAP_BASE+MEM_BLOCK.sizeof*3 |
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191 | @@: |
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192 | mov [eax-MEM_BLOCK.sizeof], eax |
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193 | add eax, MEM_BLOCK.sizeof |
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194 | loop @B |
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195 | |||
196 | mov [eax-MEM_BLOCK.sizeof], dword 0 |
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197 | |||
2138 | serge | 198 | mov ecx, heap_mutex |
199 | call mutex_init |
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2151 | serge | 200 | mov [heap_blocks], 4094 |
201 | mov [free_blocks], 4093 |
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2138 | serge | 202 | ret |
164 | serge | 203 | endp |
204 | |||
369 | serge | 205 | ; param |
206 | ; eax= required size |
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207 | ; |
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208 | ; retval |
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209 | ; edi= memory block descriptor |
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210 | ; ebx= descriptor index |
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211 | |||
164 | serge | 212 | align 4 |
819 | serge | 213 | get_small_block: |
164 | serge | 214 | mov ecx, eax |
369 | serge | 215 | shr ecx, 12 |
216 | dec ecx |
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217 | cmp ecx, 63 |
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218 | jle .get_index |
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219 | mov ecx, 63 |
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220 | .get_index: |
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221 | lea esi, [mem_block_mask] |
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164 | serge | 222 | xor ebx, ebx |
369 | serge | 223 | or edx, -1 |
164 | serge | 224 | |
225 | cmp ecx, 32 |
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226 | jb .bit_test |
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227 | |||
228 | sub ecx, 32 |
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229 | add ebx, 32 |
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230 | add esi, 4 |
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231 | .bit_test: |
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232 | shl edx, cl |
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369 | serge | 233 | and edx, [esi] |
234 | .find: |
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235 | bsf edi, edx |
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164 | serge | 236 | jz .high_mask |
369 | serge | 237 | add ebx, edi |
2138 | serge | 238 | lea ecx, [mem_block_list+ebx*8] |
239 | mov edi, ecx |
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240 | .next: |
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241 | mov edi, [edi+list_fd] |
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242 | cmp edi, ecx |
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243 | je .err |
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369 | serge | 244 | cmp eax, [edi+block_size] |
245 | ja .next |
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164 | serge | 246 | ret |
2138 | serge | 247 | .err: |
248 | xor edi, edi |
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249 | ret |
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164 | serge | 250 | |
251 | .high_mask: |
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252 | add esi, 4 |
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369 | serge | 253 | cmp esi, mem_block_mask+8 |
254 | jae .err |
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164 | serge | 255 | add ebx, 32 |
369 | serge | 256 | mov edx, [esi] |
257 | jmp .find |
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164 | serge | 258 | |
259 | |||
819 | serge | 260 | align 4 |
261 | free_mem_block: |
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2151 | serge | 262 | mov ebx, [next_memblock] |
263 | mov [eax], ebx |
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264 | mov [next_memblock], eax |
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265 | xor ebx, ebx |
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357 | serge | 266 | |
2151 | serge | 267 | mov dword [eax+4], ebx |
268 | mov dword [eax+8], ebx |
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269 | mov dword [eax+12], ebx |
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270 | mov dword [eax+16], ebx |
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271 | ; mov dword [eax+20], 0 ;don't clear block size |
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272 | mov dword [eax+24], ebx |
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273 | mov dword [eax+28], ebx |
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170 | serge | 274 | inc [free_blocks] |
164 | serge | 275 | ret |
276 | |||
277 | align 4 |
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278 | proc alloc_kernel_space stdcall, size:dword |
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279 | local block_ind:DWORD |
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280 | |||
660 | serge | 281 | push ebx |
282 | push esi |
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283 | push edi |
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284 | |||
164 | serge | 285 | mov eax, [size] |
206 | serge | 286 | add eax, 4095 |
287 | and eax, not 4095 |
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164 | serge | 288 | mov [size], eax |
279 | serge | 289 | |
170 | serge | 290 | cmp eax, [heap_free] |
291 | ja .error |
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164 | serge | 292 | |
2138 | serge | 293 | mov ecx, heap_mutex |
294 | call mutex_lock |
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295 | |||
296 | mov eax, [size] |
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297 | |||
819 | serge | 298 | call get_small_block ; eax |
369 | serge | 299 | test edi, edi |
2138 | serge | 300 | jz .error_unlock |
164 | serge | 301 | |
302 | cmp [edi+block_flags], FREE_BLOCK |
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2138 | serge | 303 | jne .error_unlock |
164 | serge | 304 | |
2143 | serge | 305 | mov [block_ind], ebx ;index of allocated block |
164 | serge | 306 | |
307 | mov eax, [edi+block_size] |
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308 | cmp eax, [size] |
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309 | je .m_eq_size |
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310 | |||
2151 | serge | 311 | mov esi, [next_memblock] ;new memory block |
312 | test esi, esi |
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2138 | serge | 313 | jz .error_unlock |
164 | serge | 314 | |
2151 | serge | 315 | dec [free_blocks] |
316 | mov eax, [esi] |
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317 | mov [next_memblock], eax |
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164 | serge | 318 | |
319 | mov [esi+block_next], edi |
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320 | mov eax, [edi+block_prev] |
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321 | mov [esi+block_prev], eax |
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322 | mov [edi+block_prev], esi |
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357 | serge | 323 | mov [esi+list_fd], 0 |
324 | mov [esi+list_bk], 0 |
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164 | serge | 325 | mov [eax+block_next], esi |
2138 | serge | 326 | |
164 | serge | 327 | mov ebx, [edi+block_base] |
328 | mov [esi+block_base], ebx |
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329 | mov edx, [size] |
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330 | mov [esi+block_size], edx |
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331 | add [edi+block_base], edx |
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332 | sub [edi+block_size], edx |
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333 | |||
334 | mov eax, [edi+block_size] |
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2138 | serge | 335 | calc_index eax |
164 | serge | 336 | cmp eax, [block_ind] |
2156 | serge | 337 | je .add_used |
164 | serge | 338 | |
2138 | serge | 339 | list_del edi |
164 | serge | 340 | |
341 | mov ecx, [block_ind] |
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2138 | serge | 342 | lea edx, [mem_block_list+ecx*8] |
343 | cmp edx, [edx] |
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164 | serge | 344 | jnz @f |
345 | btr [mem_block_mask], ecx |
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346 | @@: |
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347 | bts [mem_block_mask], eax |
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2138 | serge | 348 | lea edx, [mem_block_list+eax*8] ;edx= list head |
349 | list_add edi, edx |
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2156 | serge | 350 | .add_used: |
357 | serge | 351 | |
2156 | serge | 352 | call md.add_to_used |
2138 | serge | 353 | |
2130 | serge | 354 | mov ecx, heap_mutex |
355 | call mutex_unlock |
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356 | mov eax, [esi+block_base] |
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660 | serge | 357 | pop edi |
358 | pop esi |
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359 | pop ebx |
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164 | serge | 360 | ret |
2156 | serge | 361 | |
164 | serge | 362 | .m_eq_size: |
2138 | serge | 363 | list_del edi |
364 | lea edx, [mem_block_list+ebx*8] |
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365 | cmp edx, [edx] |
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164 | serge | 366 | jnz @f |
192 | serge | 367 | btr [mem_block_mask], ebx |
164 | serge | 368 | @@: |
2156 | serge | 369 | mov esi, edi |
370 | jmp .add_used |
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357 | serge | 371 | |
2138 | serge | 372 | .error_unlock: |
2130 | serge | 373 | mov ecx, heap_mutex |
374 | call mutex_unlock |
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2138 | serge | 375 | .error: |
164 | serge | 376 | xor eax, eax |
660 | serge | 377 | pop edi |
378 | pop esi |
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379 | pop ebx |
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164 | serge | 380 | ret |
381 | endp |
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382 | |||
383 | align 4 |
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321 | diamond | 384 | proc free_kernel_space stdcall uses ebx ecx edx esi edi, base:dword |
279 | serge | 385 | |
2130 | serge | 386 | mov ecx, heap_mutex |
387 | call mutex_lock |
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388 | |||
164 | serge | 389 | mov eax, [base] |
390 | |||
2156 | serge | 391 | call md.del_from_used |
392 | test esi, esi |
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393 | jz .fail |
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164 | serge | 394 | |
170 | serge | 395 | mov eax, [esi+block_size] |
396 | add [heap_free], eax |
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397 | |||
164 | serge | 398 | mov edi, [esi+block_next] |
399 | cmp [edi+block_flags], FREE_BLOCK |
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400 | jne .prev |
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401 | |||
2138 | serge | 402 | list_del edi |
164 | serge | 403 | |
404 | mov edx, [edi+block_next] |
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405 | mov [esi+block_next], edx |
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406 | mov [edx+block_prev], esi |
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407 | mov ecx, [edi+block_size] |
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408 | add [esi+block_size], ecx |
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409 | |||
2138 | serge | 410 | calc_index ecx |
411 | |||
412 | lea edx, [mem_block_list+ecx*8] |
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413 | cmp edx, [edx] |
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414 | jne @F |
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415 | btr [mem_block_mask], ecx |
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416 | @@: |
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164 | serge | 417 | mov eax, edi |
418 | call free_mem_block |
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419 | .prev: |
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420 | mov edi, [esi+block_prev] |
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421 | cmp [edi+block_flags], FREE_BLOCK |
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422 | jne .insert |
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423 | |||
424 | mov edx, [esi+block_next] |
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425 | mov [edi+block_next], edx |
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426 | mov [edx+block_prev], edi |
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2138 | serge | 427 | |
164 | serge | 428 | mov eax, esi |
429 | call free_mem_block |
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430 | |||
431 | mov ecx, [edi+block_size] |
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432 | mov eax, [esi+block_size] |
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433 | add eax, ecx |
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434 | mov [edi+block_size], eax |
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435 | |||
2138 | serge | 436 | calc_index eax ;new index |
437 | calc_index ecx ;old index |
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164 | serge | 438 | cmp eax, ecx |
439 | je .m_eq |
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440 | |||
441 | push ecx |
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2138 | serge | 442 | list_del edi |
164 | serge | 443 | pop ecx |
444 | |||
2138 | serge | 445 | lea edx, [mem_block_list+ecx*8] |
446 | cmp edx, [edx] |
||
447 | jne .add_block |
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164 | serge | 448 | btr [mem_block_mask], ecx |
2138 | serge | 449 | .add_block: |
164 | serge | 450 | bts [mem_block_mask], eax |
2138 | serge | 451 | lea edx, [mem_block_list+eax*8] |
452 | list_add edi, edx |
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164 | serge | 453 | .m_eq: |
2130 | serge | 454 | mov ecx, heap_mutex |
455 | call mutex_unlock |
||
164 | serge | 456 | xor eax, eax |
2130 | serge | 457 | not eax |
164 | serge | 458 | ret |
459 | .insert: |
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2138 | serge | 460 | mov [esi+block_flags], FREE_BLOCK |
164 | serge | 461 | mov eax, [esi+block_size] |
462 | calc_index eax |
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2138 | serge | 463 | mov edi, esi |
464 | jmp .add_block |
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164 | serge | 465 | |
466 | .fail: |
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2130 | serge | 467 | mov ecx, heap_mutex |
468 | call mutex_unlock |
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164 | serge | 469 | xor eax, eax |
470 | ret |
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471 | endp |
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472 | |||
473 | align 4 |
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474 | proc kernel_alloc stdcall, size:dword |
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475 | locals |
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476 | lin_addr dd ? |
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477 | pages_count dd ? |
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478 | endl |
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479 | |||
662 | serge | 480 | push ebx |
481 | push edi |
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482 | |||
164 | serge | 483 | mov eax, [size] |
206 | serge | 484 | add eax, 4095 |
485 | and eax, not 4095; |
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164 | serge | 486 | mov [size], eax |
487 | and eax, eax |
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357 | serge | 488 | jz .err |
164 | serge | 489 | mov ebx, eax |
490 | shr ebx, 12 |
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491 | mov [pages_count], ebx |
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492 | |||
493 | stdcall alloc_kernel_space, eax |
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357 | serge | 494 | test eax, eax |
495 | jz .err |
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164 | serge | 496 | mov [lin_addr], eax |
497 | |||
498 | mov ecx, [pages_count] |
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499 | mov edx, eax |
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500 | mov ebx, ecx |
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501 | |||
502 | shr ecx, 3 |
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503 | jz .next |
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504 | |||
505 | and ebx, not 7 |
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506 | push ebx |
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507 | stdcall alloc_pages, ebx |
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508 | pop ecx ; yes ecx!!! |
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509 | and eax, eax |
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357 | serge | 510 | jz .err |
164 | serge | 511 | |
512 | mov edi, eax |
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513 | mov edx, [lin_addr] |
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514 | @@: |
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515 | stdcall map_page,edx,edi,dword PG_SW |
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516 | add edx, 0x1000 |
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517 | add edi, 0x1000 |
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518 | dec ecx |
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519 | jnz @B |
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520 | .next: |
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521 | mov ecx, [pages_count] |
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522 | and ecx, 7 |
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523 | jz .end |
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357 | serge | 524 | @@: |
525 | push ecx |
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164 | serge | 526 | call alloc_page |
527 | pop ecx |
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528 | test eax, eax |
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357 | serge | 529 | jz .err |
164 | serge | 530 | |
531 | stdcall map_page,edx,eax,dword PG_SW |
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532 | add edx, 0x1000 |
||
533 | dec ecx |
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534 | jnz @B |
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535 | .end: |
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536 | mov eax, [lin_addr] |
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662 | serge | 537 | pop edi |
538 | pop ebx |
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164 | serge | 539 | ret |
357 | serge | 540 | .err: |
164 | serge | 541 | xor eax, eax |
662 | serge | 542 | pop edi |
543 | pop ebx |
||
164 | serge | 544 | ret |
545 | endp |
||
546 | |||
547 | align 4 |
||
548 | proc kernel_free stdcall, base:dword |
||
2156 | serge | 549 | |
321 | diamond | 550 | push ebx esi |
164 | serge | 551 | |
2130 | serge | 552 | mov ecx, heap_mutex |
553 | call mutex_lock |
||
279 | serge | 554 | |
164 | serge | 555 | mov eax, [base] |
2156 | serge | 556 | call md.find_used |
164 | serge | 557 | |
2156 | serge | 558 | mov ecx, heap_mutex |
164 | serge | 559 | cmp [esi+block_flags], USED_BLOCK |
560 | jne .fail |
||
561 | |||
2130 | serge | 562 | call mutex_unlock |
279 | serge | 563 | |
2166 | serge | 564 | mov eax, [esi+block_base] |
565 | mov ecx, [esi+block_size] |
||
281 | serge | 566 | shr ecx, 12 |
279 | serge | 567 | call release_pages ;eax, ecx |
164 | serge | 568 | stdcall free_kernel_space, [base] |
321 | diamond | 569 | pop esi ebx |
279 | serge | 570 | ret |
164 | serge | 571 | .fail: |
2130 | serge | 572 | call mutex_unlock |
1615 | serge | 573 | xor eax, eax |
321 | diamond | 574 | pop esi ebx |
164 | serge | 575 | ret |
576 | endp |
||
577 | |||
578 | restore block_next |
||
579 | restore block_prev |
||
580 | restore block_list |
||
581 | restore block_base |
||
582 | restore block_size |
||
583 | restore block_flags |
||
584 | |||
585 | ;;;;;;;;;;;;;; USER ;;;;;;;;;;;;;;;;; |
||
586 | |||
188 | serge | 587 | HEAP_TOP equ 0x5FC00000 |
588 | |||
164 | serge | 589 | align 4 |
188 | serge | 590 | proc init_heap |
164 | serge | 591 | |
465 | serge | 592 | mov ebx,[current_slot] |
593 | mov eax, [ebx+APPDATA.heap_top] |
||
172 | serge | 594 | test eax, eax |
595 | jz @F |
||
465 | serge | 596 | sub eax,[ebx+APPDATA.heap_base] |
172 | serge | 597 | sub eax, 4096 |
598 | ret |
||
599 | @@: |
||
465 | serge | 600 | mov esi, [ebx+APPDATA.mem_size] |
188 | serge | 601 | add esi, 4095 |
602 | and esi, not 4095 |
||
465 | serge | 603 | mov [ebx+APPDATA.mem_size], esi |
188 | serge | 604 | mov eax, HEAP_TOP |
465 | serge | 605 | mov [ebx+APPDATA.heap_base], esi |
606 | mov [ebx+APPDATA.heap_top], eax |
||
164 | serge | 607 | |
188 | serge | 608 | sub eax, esi |
609 | shr esi, 10 |
||
610 | mov ecx, eax |
||
164 | serge | 611 | sub eax, 4096 |
188 | serge | 612 | or ecx, FREE_BLOCK |
365 | serge | 613 | mov [page_tabs+esi], ecx |
164 | serge | 614 | ret |
615 | endp |
||
616 | |||
617 | align 4 |
||
618 | proc user_alloc stdcall, alloc_size:dword |
||
619 | |||
662 | serge | 620 | push ebx |
621 | push esi |
||
622 | push edi |
||
623 | |||
164 | serge | 624 | mov ecx, [alloc_size] |
625 | add ecx, (4095+4096) |
||
626 | and ecx, not 4095 |
||
627 | |||
465 | serge | 628 | mov ebx, [current_slot] |
629 | mov esi, dword [ebx+APPDATA.heap_base] ; heap_base |
||
630 | mov edi, dword [ebx+APPDATA.heap_top] ; heap_top |
||
164 | serge | 631 | l_0: |
632 | cmp esi, edi |
||
633 | jae m_exit |
||
634 | |||
635 | mov ebx, esi |
||
636 | shr ebx, 12 |
||
365 | serge | 637 | mov eax, [page_tabs+ebx*4] |
620 | diamond | 638 | test al, FREE_BLOCK |
164 | serge | 639 | jz test_used |
640 | and eax, 0xFFFFF000 |
||
641 | cmp eax, ecx ;alloc_size |
||
642 | jb m_next |
||
940 | serge | 643 | jz @f |
164 | serge | 644 | |
620 | diamond | 645 | lea edx, [esi+ecx] |
646 | sub eax, ecx |
||
647 | or al, FREE_BLOCK |
||
164 | serge | 648 | shr edx, 12 |
365 | serge | 649 | mov [page_tabs+edx*4], eax |
294 | diamond | 650 | @@: |
164 | serge | 651 | or ecx, USED_BLOCK |
365 | serge | 652 | mov [page_tabs+ebx*4], ecx |
164 | serge | 653 | shr ecx, 12 |
620 | diamond | 654 | inc ebx |
164 | serge | 655 | dec ecx |
620 | diamond | 656 | jz .no |
164 | serge | 657 | @@: |
365 | serge | 658 | mov dword [page_tabs+ebx*4], 2 |
164 | serge | 659 | inc ebx |
660 | dec ecx |
||
661 | jnz @B |
||
620 | diamond | 662 | .no: |
164 | serge | 663 | |
465 | serge | 664 | mov edx, [current_slot] |
665 | mov ebx, [alloc_size] |
||
666 | add ebx, 0xFFF |
||
667 | and ebx, not 0xFFF |
||
668 | add ebx, [edx+APPDATA.mem_size] |
||
669 | call update_mem_size |
||
294 | diamond | 670 | |
620 | diamond | 671 | lea eax, [esi+4096] |
662 | serge | 672 | |
673 | pop edi |
||
674 | pop esi |
||
675 | pop ebx |
||
164 | serge | 676 | ret |
677 | test_used: |
||
620 | diamond | 678 | test al, USED_BLOCK |
164 | serge | 679 | jz m_exit |
680 | |||
681 | and eax, 0xFFFFF000 |
||
620 | diamond | 682 | m_next: |
164 | serge | 683 | add esi, eax |
684 | jmp l_0 |
||
685 | m_exit: |
||
686 | xor eax, eax |
||
662 | serge | 687 | pop edi |
688 | pop esi |
||
689 | pop ebx |
||
164 | serge | 690 | ret |
691 | endp |
||
692 | |||
693 | align 4 |
||
1289 | diamond | 694 | proc user_alloc_at stdcall, address:dword, alloc_size:dword |
695 | |||
696 | push ebx |
||
697 | push esi |
||
698 | push edi |
||
699 | |||
700 | mov ebx, [current_slot] |
||
701 | mov edx, [address] |
||
702 | and edx, not 0xFFF |
||
703 | mov [address], edx |
||
704 | sub edx, 0x1000 |
||
705 | jb .error |
||
706 | mov esi, [ebx+APPDATA.heap_base] |
||
707 | mov edi, [ebx+APPDATA.heap_top] |
||
708 | cmp edx, esi |
||
709 | jb .error |
||
710 | .scan: |
||
711 | cmp esi, edi |
||
712 | jae .error |
||
713 | mov ebx, esi |
||
714 | shr ebx, 12 |
||
715 | mov eax, [page_tabs+ebx*4] |
||
716 | mov ecx, eax |
||
717 | and ecx, 0xFFFFF000 |
||
718 | add ecx, esi |
||
719 | cmp edx, ecx |
||
720 | jb .found |
||
721 | mov esi, ecx |
||
722 | jmp .scan |
||
723 | .error: |
||
724 | xor eax, eax |
||
725 | pop edi |
||
726 | pop esi |
||
727 | pop ebx |
||
728 | ret |
||
729 | .found: |
||
730 | test al, FREE_BLOCK |
||
731 | jz .error |
||
732 | mov eax, ecx |
||
733 | sub eax, edx |
||
734 | sub eax, 0x1000 |
||
735 | cmp eax, [alloc_size] |
||
736 | jb .error |
||
737 | |||
738 | ; Here we have 1 big free block which includes requested area. |
||
739 | ; In general, 3 other blocks must be created instead: |
||
740 | ; free at [esi, edx); |
||
741 | ; busy at [edx, edx+0x1000+ALIGN_UP(alloc_size,0x1000)); |
||
742 | ; free at [edx+0x1000+ALIGN_UP(alloc_size,0x1000), ecx) |
||
743 | ; First or third block (or both) may be absent. |
||
744 | mov eax, edx |
||
745 | sub eax, esi |
||
746 | jz .nofirst |
||
747 | or al, FREE_BLOCK |
||
748 | mov [page_tabs+ebx*4], eax |
||
749 | .nofirst: |
||
750 | mov eax, [alloc_size] |
||
751 | add eax, 0x1FFF |
||
752 | and eax, not 0xFFF |
||
753 | mov ebx, edx |
||
754 | add edx, eax |
||
755 | shr ebx, 12 |
||
756 | or al, USED_BLOCK |
||
757 | mov [page_tabs+ebx*4], eax |
||
758 | shr eax, 12 |
||
759 | dec eax |
||
760 | jz .second_nofill |
||
761 | inc ebx |
||
762 | .fill: |
||
763 | mov dword [page_tabs+ebx*4], 2 |
||
764 | inc ebx |
||
765 | dec eax |
||
766 | jnz .fill |
||
767 | .second_nofill: |
||
768 | sub ecx, edx |
||
769 | jz .nothird |
||
770 | or cl, FREE_BLOCK |
||
771 | mov [page_tabs+ebx*4], ecx |
||
772 | .nothird: |
||
773 | |||
774 | mov edx, [current_slot] |
||
775 | mov ebx, [alloc_size] |
||
776 | add ebx, 0xFFF |
||
777 | and ebx, not 0xFFF |
||
778 | add ebx, [edx+APPDATA.mem_size] |
||
779 | call update_mem_size |
||
780 | |||
781 | mov eax, [address] |
||
782 | |||
783 | pop edi |
||
784 | pop esi |
||
785 | pop ebx |
||
786 | ret |
||
787 | endp |
||
788 | |||
789 | align 4 |
||
164 | serge | 790 | proc user_free stdcall, base:dword |
791 | |||
662 | serge | 792 | push esi |
793 | |||
164 | serge | 794 | mov esi, [base] |
795 | test esi, esi |
||
796 | jz .exit |
||
797 | |||
662 | serge | 798 | push ebx |
799 | |||
294 | diamond | 800 | xor ebx, ebx |
164 | serge | 801 | shr esi, 12 |
620 | diamond | 802 | mov eax, [page_tabs+(esi-1)*4] |
546 | diamond | 803 | test al, USED_BLOCK |
620 | diamond | 804 | jz .cantfree |
546 | diamond | 805 | test al, DONT_FREE_BLOCK |
806 | jnz .cantfree |
||
164 | serge | 807 | |
808 | and eax, not 4095 |
||
809 | mov ecx, eax |
||
620 | diamond | 810 | or al, FREE_BLOCK |
811 | mov [page_tabs+(esi-1)*4], eax |
||
164 | serge | 812 | sub ecx, 4096 |
620 | diamond | 813 | mov ebx, ecx |
164 | serge | 814 | shr ecx, 12 |
620 | diamond | 815 | jz .released |
164 | serge | 816 | .release: |
188 | serge | 817 | xor eax, eax |
365 | serge | 818 | xchg eax, [page_tabs+esi*4] |
620 | diamond | 819 | test al, 1 |
188 | serge | 820 | jz @F |
940 | serge | 821 | test eax, PG_SHARED |
822 | jnz @F |
||
164 | serge | 823 | call free_page |
448 | diamond | 824 | mov eax, esi |
825 | shl eax, 12 |
||
826 | invlpg [eax] |
||
188 | serge | 827 | @@: |
164 | serge | 828 | inc esi |
829 | dec ecx |
||
830 | jnz .release |
||
620 | diamond | 831 | .released: |
662 | serge | 832 | push edi |
833 | |||
465 | serge | 834 | mov edx, [current_slot] |
835 | mov esi, dword [edx+APPDATA.heap_base] |
||
836 | mov edi, dword [edx+APPDATA.heap_top] |
||
837 | sub ebx, [edx+APPDATA.mem_size] |
||
294 | diamond | 838 | neg ebx |
839 | call update_mem_size |
||
448 | diamond | 840 | call user_normalize |
662 | serge | 841 | pop edi |
842 | pop ebx |
||
843 | pop esi |
||
448 | diamond | 844 | ret |
845 | .exit: |
||
846 | xor eax, eax |
||
847 | inc eax |
||
662 | serge | 848 | pop esi |
448 | diamond | 849 | ret |
546 | diamond | 850 | .cantfree: |
851 | xor eax, eax |
||
662 | serge | 852 | pop ebx |
853 | pop esi |
||
546 | diamond | 854 | ret |
448 | diamond | 855 | endp |
856 | |||
857 | user_normalize: |
||
858 | ; in: esi=heap_base, edi=heap_top |
||
859 | ; out: eax=0 <=> OK |
||
860 | ; destroys: ebx,edx,esi,edi |
||
164 | serge | 861 | shr esi, 12 |
862 | shr edi, 12 |
||
863 | @@: |
||
365 | serge | 864 | mov eax, [page_tabs+esi*4] |
620 | diamond | 865 | test al, USED_BLOCK |
164 | serge | 866 | jz .test_free |
867 | shr eax, 12 |
||
868 | add esi, eax |
||
869 | jmp @B |
||
870 | .test_free: |
||
620 | diamond | 871 | test al, FREE_BLOCK |
164 | serge | 872 | jz .err |
873 | mov edx, eax |
||
874 | shr edx, 12 |
||
875 | add edx, esi |
||
876 | cmp edx, edi |
||
877 | jae .exit |
||
878 | |||
365 | serge | 879 | mov ebx, [page_tabs+edx*4] |
620 | diamond | 880 | test bl, USED_BLOCK |
164 | serge | 881 | jz .next_free |
882 | |||
883 | shr ebx, 12 |
||
884 | add edx, ebx |
||
885 | mov esi, edx |
||
886 | jmp @B |
||
887 | .next_free: |
||
620 | diamond | 888 | test bl, FREE_BLOCK |
164 | serge | 889 | jz .err |
365 | serge | 890 | and dword [page_tabs+edx*4], 0 |
164 | serge | 891 | add eax, ebx |
892 | and eax, not 4095 |
||
893 | or eax, FREE_BLOCK |
||
365 | serge | 894 | mov [page_tabs+esi*4], eax |
164 | serge | 895 | jmp @B |
896 | .exit: |
||
897 | xor eax, eax |
||
898 | inc eax |
||
899 | ret |
||
900 | .err: |
||
901 | xor eax, eax |
||
902 | ret |
||
903 | |||
448 | diamond | 904 | user_realloc: |
905 | ; in: eax = pointer, ebx = new size |
||
906 | ; out: eax = new pointer or NULL |
||
907 | test eax, eax |
||
908 | jnz @f |
||
909 | ; realloc(NULL,sz) - same as malloc(sz) |
||
910 | push ebx |
||
911 | call user_alloc |
||
912 | ret |
||
913 | @@: |
||
914 | push ecx edx |
||
465 | serge | 915 | lea ecx, [eax - 0x1000] |
448 | diamond | 916 | shr ecx, 12 |
917 | mov edx, [page_tabs+ecx*4] |
||
620 | diamond | 918 | test dl, USED_BLOCK |
448 | diamond | 919 | jnz @f |
920 | ; attempt to realloc invalid pointer |
||
921 | .ret0: |
||
922 | pop edx ecx |
||
923 | xor eax, eax |
||
924 | ret |
||
925 | @@: |
||
620 | diamond | 926 | test dl, DONT_FREE_BLOCK |
546 | diamond | 927 | jnz .ret0 |
448 | diamond | 928 | add ebx, 0x1FFF |
929 | shr edx, 12 |
||
930 | shr ebx, 12 |
||
931 | ; edx = allocated size, ebx = new size |
||
932 | add edx, ecx |
||
933 | add ebx, ecx |
||
934 | cmp edx, ebx |
||
935 | jb .realloc_add |
||
936 | ; release part of allocated memory |
||
937 | .loop: |
||
938 | cmp edx, ebx |
||
939 | jz .release_done |
||
940 | dec edx |
||
941 | xor eax, eax |
||
942 | xchg eax, [page_tabs+edx*4] |
||
943 | test al, 1 |
||
944 | jz .loop |
||
945 | call free_page |
||
946 | mov eax, edx |
||
947 | shl eax, 12 |
||
948 | invlpg [eax] |
||
949 | jmp .loop |
||
950 | .release_done: |
||
951 | sub ebx, ecx |
||
952 | cmp ebx, 1 |
||
953 | jnz .nofreeall |
||
954 | mov eax, [page_tabs+ecx*4] |
||
955 | and eax, not 0xFFF |
||
465 | serge | 956 | mov edx, [current_slot] |
957 | mov ebx, [APPDATA.mem_size+edx] |
||
448 | diamond | 958 | sub ebx, eax |
959 | add ebx, 0x1000 |
||
960 | or al, FREE_BLOCK |
||
961 | mov [page_tabs+ecx*4], eax |
||
962 | push esi edi |
||
465 | serge | 963 | mov esi, [APPDATA.heap_base+edx] |
964 | mov edi, [APPDATA.heap_top+edx] |
||
448 | diamond | 965 | call update_mem_size |
966 | call user_normalize |
||
967 | pop edi esi |
||
968 | jmp .ret0 ; all freed |
||
969 | .nofreeall: |
||
970 | sub edx, ecx |
||
971 | shl ebx, 12 |
||
972 | or ebx, USED_BLOCK |
||
973 | xchg [page_tabs+ecx*4], ebx |
||
974 | shr ebx, 12 |
||
975 | sub ebx, edx |
||
976 | push ebx ecx edx |
||
465 | serge | 977 | mov edx, [current_slot] |
448 | diamond | 978 | shl ebx, 12 |
465 | serge | 979 | sub ebx, [APPDATA.mem_size+edx] |
448 | diamond | 980 | neg ebx |
981 | call update_mem_size |
||
982 | pop edx ecx ebx |
||
465 | serge | 983 | lea eax, [ecx+1] |
448 | diamond | 984 | shl eax, 12 |
985 | push eax |
||
823 | diamond | 986 | add ecx, edx |
987 | lea edx, [ecx+ebx] |
||
448 | diamond | 988 | shl ebx, 12 |
989 | jz .ret |
||
990 | push esi |
||
465 | serge | 991 | mov esi, [current_slot] |
992 | mov esi, [APPDATA.heap_top+esi] |
||
448 | diamond | 993 | shr esi, 12 |
994 | @@: |
||
995 | cmp edx, esi |
||
996 | jae .merge_done |
||
997 | mov eax, [page_tabs+edx*4] |
||
998 | test al, USED_BLOCK |
||
823 | diamond | 999 | jnz .merge_done |
448 | diamond | 1000 | and dword [page_tabs+edx*4], 0 |
823 | diamond | 1001 | shr eax, 12 |
1002 | add edx, eax |
||
1003 | shl eax, 12 |
||
448 | diamond | 1004 | add ebx, eax |
1005 | jmp @b |
||
1006 | .merge_done: |
||
1007 | pop esi |
||
1008 | or ebx, FREE_BLOCK |
||
1009 | mov [page_tabs+ecx*4], ebx |
||
1010 | .ret: |
||
1011 | pop eax edx ecx |
||
1012 | ret |
||
1013 | .realloc_add: |
||
1014 | ; get some additional memory |
||
465 | serge | 1015 | mov eax, [current_slot] |
1016 | mov eax, [APPDATA.heap_top+eax] |
||
448 | diamond | 1017 | shr eax, 12 |
1018 | cmp edx, eax |
||
1019 | jae .cant_inplace |
||
1020 | mov eax, [page_tabs+edx*4] |
||
620 | diamond | 1021 | test al, FREE_BLOCK |
1022 | jz .cant_inplace |
||
448 | diamond | 1023 | shr eax, 12 |
1024 | add eax, edx |
||
620 | diamond | 1025 | sub eax, ebx |
448 | diamond | 1026 | jb .cant_inplace |
1027 | jz @f |
||
1028 | shl eax, 12 |
||
1029 | or al, FREE_BLOCK |
||
1030 | mov [page_tabs+ebx*4], eax |
||
1031 | @@: |
||
1032 | mov eax, ebx |
||
1033 | sub eax, ecx |
||
1034 | shl eax, 12 |
||
1035 | or al, USED_BLOCK |
||
1036 | mov [page_tabs+ecx*4], eax |
||
465 | serge | 1037 | lea eax, [ecx+1] |
448 | diamond | 1038 | shl eax, 12 |
1039 | push eax |
||
1040 | push edi |
||
1041 | lea edi, [page_tabs+edx*4] |
||
1042 | mov eax, 2 |
||
1043 | sub ebx, edx |
||
1044 | mov ecx, ebx |
||
1045 | cld |
||
1046 | rep stosd |
||
1047 | pop edi |
||
465 | serge | 1048 | mov edx, [current_slot] |
448 | diamond | 1049 | shl ebx, 12 |
465 | serge | 1050 | add ebx, [APPDATA.mem_size+edx] |
448 | diamond | 1051 | call update_mem_size |
1052 | pop eax edx ecx |
||
1053 | ret |
||
1054 | .cant_inplace: |
||
1055 | push esi edi |
||
465 | serge | 1056 | mov eax, [current_slot] |
1057 | mov esi, [APPDATA.heap_base+eax] |
||
1058 | mov edi, [APPDATA.heap_top+eax] |
||
448 | diamond | 1059 | shr esi, 12 |
1060 | shr edi, 12 |
||
1061 | sub ebx, ecx |
||
1062 | .find_place: |
||
1063 | cmp esi, edi |
||
1064 | jae .place_not_found |
||
1065 | mov eax, [page_tabs+esi*4] |
||
1066 | test al, FREE_BLOCK |
||
1067 | jz .next_place |
||
1068 | shr eax, 12 |
||
1069 | cmp eax, ebx |
||
1070 | jae .place_found |
||
1071 | add esi, eax |
||
1072 | jmp .find_place |
||
1073 | .next_place: |
||
1074 | shr eax, 12 |
||
1075 | add esi, eax |
||
1076 | jmp .find_place |
||
1077 | .place_not_found: |
||
1078 | pop edi esi |
||
1079 | jmp .ret0 |
||
1080 | .place_found: |
||
1081 | sub eax, ebx |
||
1082 | jz @f |
||
1083 | push esi |
||
620 | diamond | 1084 | add esi, ebx |
448 | diamond | 1085 | shl eax, 12 |
1086 | or al, FREE_BLOCK |
||
1087 | mov [page_tabs+esi*4], eax |
||
1088 | pop esi |
||
1089 | @@: |
||
1090 | mov eax, ebx |
||
1091 | shl eax, 12 |
||
1092 | or al, USED_BLOCK |
||
1093 | mov [page_tabs+esi*4], eax |
||
1094 | inc esi |
||
1095 | mov eax, esi |
||
1096 | shl eax, 12 |
||
1097 | push eax |
||
1098 | mov eax, [page_tabs+ecx*4] |
||
1099 | and eax, not 0xFFF |
||
1100 | or al, FREE_BLOCK |
||
1101 | sub edx, ecx |
||
1102 | mov [page_tabs+ecx*4], eax |
||
1103 | inc ecx |
||
620 | diamond | 1104 | dec ebx |
1105 | dec edx |
||
1106 | jz .no |
||
448 | diamond | 1107 | @@: |
1108 | xor eax, eax |
||
1109 | xchg eax, [page_tabs+ecx*4] |
||
1110 | mov [page_tabs+esi*4], eax |
||
940 | serge | 1111 | mov eax, ecx |
1112 | shl eax, 12 |
||
1113 | invlpg [eax] |
||
620 | diamond | 1114 | inc esi |
448 | diamond | 1115 | inc ecx |
1116 | dec ebx |
||
1117 | dec edx |
||
1118 | jnz @b |
||
620 | diamond | 1119 | .no: |
448 | diamond | 1120 | push ebx |
465 | serge | 1121 | mov edx, [current_slot] |
448 | diamond | 1122 | shl ebx, 12 |
465 | serge | 1123 | add ebx, [APPDATA.mem_size+edx] |
448 | diamond | 1124 | call update_mem_size |
1125 | pop ebx |
||
1126 | @@: |
||
1127 | mov dword [page_tabs+esi*4], 2 |
||
1128 | inc esi |
||
1129 | dec ebx |
||
1130 | jnz @b |
||
1131 | pop eax edi esi edx ecx |
||
1132 | ret |
||
1133 | |||
278 | serge | 1134 | if 0 |
164 | serge | 1135 | align 4 |
1136 | proc alloc_dll |
||
1137 | pushf |
||
1138 | cli |
||
1139 | bsf eax, [dll_map] |
||
1140 | jnz .find |
||
1141 | popf |
||
1142 | xor eax, eax |
||
1143 | ret |
||
1144 | .find: |
||
1145 | btr [dll_map], eax |
||
1146 | popf |
||
1147 | shl eax, 5 |
||
1148 | add eax, dll_tab |
||
1149 | ret |
||
1150 | endp |
||
1151 | |||
1152 | align 4 |
||
1153 | proc alloc_service |
||
1154 | pushf |
||
1155 | cli |
||
1156 | bsf eax, [srv_map] |
||
1157 | jnz .find |
||
1158 | popf |
||
1159 | xor eax, eax |
||
1160 | ret |
||
214 | serge | 1161 | .find: |
1162 | btr [srv_map], eax |
||
164 | serge | 1163 | popf |
214 | serge | 1164 | shl eax,0x02 |
1165 | lea eax,[srv_tab+eax+eax*8] ;srv_tab+eax*36 |
||
164 | serge | 1166 | ret |
1167 | endp |
||
278 | serge | 1168 | |
1169 | end if |
||
940 | serge | 1170 | |
1171 | |||
1172 | ;;;;;;;;;;;;;; SHARED ;;;;;;;;;;;;;;;;; |
||
1173 | |||
1174 | |||
1175 | ; param |
||
1176 | ; eax= shm_map object |
||
1177 | |||
1178 | align 4 |
||
1179 | destroy_smap: |
||
1180 | |||
1181 | pushfd |
||
1182 | cli |
||
1183 | |||
945 | serge | 1184 | push esi |
1185 | push edi |
||
940 | serge | 1186 | |
945 | serge | 1187 | mov edi, eax |
1188 | mov esi, [eax+SMAP.parent] |
||
1189 | test esi, esi |
||
1190 | jz .done |
||
940 | serge | 1191 | |
945 | serge | 1192 | lock dec [esi+SMEM.refcount] |
1193 | jnz .done |
||
940 | serge | 1194 | |
945 | serge | 1195 | mov ecx, [esi+SMEM.bk] |
1196 | mov edx, [esi+SMEM.fd] |
||
1197 | |||
1198 | mov [ecx+SMEM.fd], edx |
||
1199 | mov [edx+SMEM.bk], ecx |
||
1200 | |||
1201 | stdcall kernel_free, [esi+SMEM.base] |
||
1202 | mov eax, esi |
||
1203 | call free |
||
1204 | .done: |
||
1205 | mov eax, edi |
||
940 | serge | 1206 | call destroy_kernel_object |
1207 | |||
945 | serge | 1208 | pop edi |
1209 | pop esi |
||
940 | serge | 1210 | popfd |
1211 | |||
1212 | ret |
||
1213 | |||
1214 | E_NOTFOUND equ 5 |
||
1215 | E_ACCESS equ 10 |
||
1216 | E_NOMEM equ 30 |
||
1217 | E_PARAM equ 33 |
||
1218 | |||
1219 | SHM_READ equ 0 |
||
1220 | SHM_WRITE equ 1 |
||
1221 | |||
1222 | SHM_ACCESS_MASK equ 3 |
||
1223 | |||
1224 | SHM_OPEN equ (0 shl 2) |
||
1225 | SHM_OPEN_ALWAYS equ (1 shl 2) |
||
1226 | SHM_CREATE equ (2 shl 2) |
||
1227 | |||
1228 | SHM_OPEN_MASK equ (3 shl 2) |
||
1229 | |||
1230 | align 4 |
||
1231 | proc shmem_open stdcall name:dword, size:dword, access:dword |
||
1232 | locals |
||
1233 | action dd ? |
||
1234 | owner_access dd ? |
||
1235 | mapped dd ? |
||
1236 | endl |
||
1237 | |||
1238 | push ebx |
||
1239 | push esi |
||
1240 | push edi |
||
1241 | |||
1242 | mov [mapped], 0 |
||
1243 | mov [owner_access], 0 |
||
1244 | |||
1245 | pushfd ;mutex required |
||
1246 | cli |
||
1247 | |||
1248 | mov eax, [access] |
||
1249 | and eax, SHM_OPEN_MASK |
||
1250 | mov [action], eax |
||
1251 | |||
1213 | serge | 1252 | mov ebx, [name] |
1253 | test ebx, ebx |
||
940 | serge | 1254 | mov edx, E_PARAM |
1213 | serge | 1255 | jz .fail |
940 | serge | 1256 | |
1257 | mov esi, [shmem_list.fd] |
||
1258 | align 4 |
||
1259 | @@: |
||
1260 | cmp esi, shmem_list |
||
1261 | je .not_found |
||
1262 | |||
943 | serge | 1263 | lea edx, [esi+SMEM.name] ; link , base, size |
1213 | serge | 1264 | stdcall strncmp, edx, ebx, 32 |
940 | serge | 1265 | test eax, eax |
1266 | je .found |
||
1267 | |||
943 | serge | 1268 | mov esi, [esi+SMEM.fd] |
940 | serge | 1269 | jmp @B |
1270 | |||
1271 | .not_found: |
||
1272 | mov eax, [action] |
||
1273 | |||
1274 | cmp eax, SHM_OPEN |
||
1275 | mov edx, E_NOTFOUND |
||
1213 | serge | 1276 | je .fail |
940 | serge | 1277 | |
1278 | cmp eax, SHM_CREATE |
||
1279 | mov edx, E_PARAM |
||
1280 | je .create_shm |
||
1281 | |||
1282 | cmp eax, SHM_OPEN_ALWAYS |
||
1213 | serge | 1283 | jne .fail |
940 | serge | 1284 | |
1285 | .create_shm: |
||
1286 | |||
1287 | mov ecx, [size] |
||
1288 | test ecx, ecx |
||
1213 | serge | 1289 | jz .fail |
940 | serge | 1290 | |
1291 | add ecx, 4095 |
||
1292 | and ecx, -4096 |
||
1293 | mov [size], ecx |
||
1294 | |||
943 | serge | 1295 | mov eax, SMEM.sizeof |
940 | serge | 1296 | call malloc |
1297 | test eax, eax |
||
1298 | mov esi, eax |
||
1299 | mov edx, E_NOMEM |
||
1213 | serge | 1300 | jz .fail |
940 | serge | 1301 | |
1302 | stdcall kernel_alloc, [size] |
||
1303 | test eax, eax |
||
1304 | mov [mapped], eax |
||
1305 | mov edx, E_NOMEM |
||
1306 | jz .cleanup |
||
1307 | |||
1308 | mov ecx, [size] |
||
1309 | mov edx, [access] |
||
1310 | and edx, SHM_ACCESS_MASK |
||
1311 | |||
943 | serge | 1312 | mov [esi+SMEM.base], eax |
1313 | mov [esi+SMEM.size], ecx |
||
1314 | mov [esi+SMEM.access], edx |
||
1315 | mov [esi+SMEM.refcount], 0 |
||
1316 | mov [esi+SMEM.name+28], 0 |
||
940 | serge | 1317 | |
943 | serge | 1318 | lea eax, [esi+SMEM.name] |
940 | serge | 1319 | stdcall strncpy, eax, [name], 31 |
1320 | |||
1321 | mov eax, [shmem_list.fd] |
||
943 | serge | 1322 | mov [esi+SMEM.bk], shmem_list |
1323 | mov [esi+SMEM.fd], eax |
||
940 | serge | 1324 | |
943 | serge | 1325 | mov [eax+SMEM.bk], esi |
940 | serge | 1326 | mov [shmem_list.fd], esi |
1327 | |||
1328 | mov [action], SHM_OPEN |
||
1329 | mov [owner_access], SHM_WRITE |
||
1330 | |||
1331 | .found: |
||
1332 | mov eax, [action] |
||
1333 | |||
1334 | cmp eax, SHM_CREATE |
||
1335 | mov edx, E_ACCESS |
||
1336 | je .exit |
||
1337 | |||
1338 | cmp eax, SHM_OPEN |
||
1339 | mov edx, E_PARAM |
||
1340 | je .create_map |
||
1341 | |||
1342 | cmp eax, SHM_OPEN_ALWAYS |
||
1213 | serge | 1343 | jne .fail |
940 | serge | 1344 | |
1345 | .create_map: |
||
1346 | |||
1347 | mov eax, [access] |
||
1348 | and eax, SHM_ACCESS_MASK |
||
943 | serge | 1349 | cmp eax, [esi+SMEM.access] |
940 | serge | 1350 | mov [access], eax |
1351 | mov edx, E_ACCESS |
||
1213 | serge | 1352 | ja .fail |
940 | serge | 1353 | |
1354 | mov ebx, [CURRENT_TASK] |
||
1355 | shl ebx, 5 |
||
1356 | mov ebx, [CURRENT_TASK+ebx+4] |
||
943 | serge | 1357 | mov eax, SMAP.sizeof |
940 | serge | 1358 | |
1359 | call create_kernel_object |
||
1360 | test eax, eax |
||
1361 | mov edi, eax |
||
1362 | mov edx, E_NOMEM |
||
1213 | serge | 1363 | jz .fail |
940 | serge | 1364 | |
1213 | serge | 1365 | inc [esi+SMEM.refcount] |
1366 | |||
943 | serge | 1367 | mov [edi+SMAP.magic], 'SMAP' |
1368 | mov [edi+SMAP.destroy], destroy_smap |
||
1213 | serge | 1369 | mov [edi+SMAP.parent], esi |
943 | serge | 1370 | mov [edi+SMAP.base], 0 |
940 | serge | 1371 | |
943 | serge | 1372 | stdcall user_alloc, [esi+SMEM.size] |
940 | serge | 1373 | test eax, eax |
1374 | mov [mapped], eax |
||
1375 | mov edx, E_NOMEM |
||
1376 | jz .cleanup2 |
||
1377 | |||
943 | serge | 1378 | mov [edi+SMAP.base], eax |
940 | serge | 1379 | |
943 | serge | 1380 | mov ecx, [esi+SMEM.size] |
940 | serge | 1381 | mov [size], ecx |
1382 | |||
1383 | shr ecx, 12 |
||
1384 | shr eax, 10 |
||
1385 | |||
943 | serge | 1386 | mov esi, [esi+SMEM.base] |
940 | serge | 1387 | shr esi, 10 |
1388 | lea edi, [page_tabs+eax] |
||
1389 | add esi, page_tabs |
||
1390 | |||
1391 | mov edx, [access] |
||
1392 | or edx, [owner_access] |
||
1393 | shl edx, 1 |
||
1394 | or edx, PG_USER+PG_SHARED |
||
1395 | @@: |
||
1396 | lodsd |
||
1397 | and eax, 0xFFFFF000 |
||
1398 | or eax, edx |
||
1399 | stosd |
||
1400 | loop @B |
||
1401 | |||
1402 | xor edx, edx |
||
1403 | |||
1404 | cmp [owner_access], 0 |
||
1213 | serge | 1405 | jne .fail |
1406 | .exit: |
||
940 | serge | 1407 | mov edx, [size] |
1213 | serge | 1408 | .fail: |
940 | serge | 1409 | mov eax, [mapped] |
1410 | |||
1411 | popfd |
||
1412 | pop edi |
||
1413 | pop esi |
||
1414 | pop ebx |
||
1415 | ret |
||
1416 | .cleanup: |
||
1213 | serge | 1417 | mov [size], edx |
940 | serge | 1418 | mov eax, esi |
1419 | call free |
||
1420 | jmp .exit |
||
1421 | |||
1422 | .cleanup2: |
||
1213 | serge | 1423 | mov [size], edx |
940 | serge | 1424 | mov eax, edi |
1425 | call destroy_smap |
||
1426 | jmp .exit |
||
1427 | endp |
||
943 | serge | 1428 | |
1429 | align 4 |
||
1430 | proc shmem_close stdcall, name:dword |
||
1431 | |||
1432 | mov eax, [name] |
||
1433 | test eax, eax |
||
1434 | jz .fail |
||
1435 | |||
1436 | push esi |
||
1437 | push edi |
||
945 | serge | 1438 | pushfd |
1439 | cli |
||
943 | serge | 1440 | |
1441 | mov esi, [current_slot] |
||
1442 | add esi, APP_OBJ_OFFSET |
||
1443 | .next: |
||
1444 | mov eax, [esi+APPOBJ.fd] |
||
1445 | test eax, eax |
||
1446 | jz @F |
||
1447 | |||
1448 | cmp eax, esi |
||
1449 | mov esi, eax |
||
1450 | je @F |
||
1451 | |||
1452 | cmp [eax+SMAP.magic], 'SMAP' |
||
1453 | jne .next |
||
1454 | |||
1455 | mov edi, [eax+SMAP.parent] |
||
1456 | test edi, edi |
||
1457 | jz .next |
||
1458 | |||
1501 | mario79 | 1459 | lea edi, [edi+SMEM.name] |
943 | serge | 1460 | stdcall strncmp, [name], edi, 32 |
1461 | test eax, eax |
||
1462 | jne .next |
||
1463 | |||
945 | serge | 1464 | stdcall user_free, [esi+SMAP.base] |
1465 | |||
1501 | mario79 | 1466 | mov eax,esi |
943 | serge | 1467 | call [esi+APPOBJ.destroy] |
1468 | @@: |
||
945 | serge | 1469 | popfd |
943 | serge | 1470 | pop edi |
1471 | pop esi |
||
1472 | .fail: |
||
1473 | ret |
||
1474 | endp |
||
2138 | serge | 1475 | |
1476 | align 4 |
||
1477 | sys_perf: |
||
1478 | test ecx, ecx |
||
1479 | jz .fail |
||
1480 | |||
1481 | mov edi, ecx |
||
1482 | mov esi, mem_hash_cnt |
||
1483 | mov ecx, 64 |
||
1484 | rep movsd |
||
1485 | .fail: |
||
1486 | ret=> |