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Rev | Author | Line No. | Line |
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2288 | clevermous | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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2455 | mario79 | 3 | ;; Copyright (C) KolibriOS team 2004-2012. All rights reserved. ;; |
2288 | clevermous | 4 | ;; Distributed under terms of the GNU General Public License ;; |
5 | ;; ;; |
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6 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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7 | |||
8 | $Revision: 3798 $ |
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9 | |||
10 | |||
2384 | hidnplayr | 11 | struct MEM_BLOCK |
12 | list LHEAD |
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13 | next_block dd ? ;+8 |
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14 | prev_block dd ? ;+4 |
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15 | base dd ? ;+16 |
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16 | size dd ? ;+20 |
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17 | flags dd ? ;+24 |
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18 | handle dd ? ;+28 |
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19 | ends |
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2288 | clevermous | 20 | |
21 | FREE_BLOCK equ 4 |
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22 | USED_BLOCK equ 8 |
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23 | DONT_FREE_BLOCK equ 10h |
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24 | |||
25 | |||
26 | block_next equ MEM_BLOCK.next_block |
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27 | block_prev equ MEM_BLOCK.prev_block |
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28 | list_fd equ MEM_BLOCK.list.next |
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29 | list_bk equ MEM_BLOCK.list.prev |
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30 | block_base equ MEM_BLOCK.base |
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31 | block_size equ MEM_BLOCK.size |
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32 | block_flags equ MEM_BLOCK.flags |
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33 | |||
34 | macro calc_index op |
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35 | { shr op, 12 |
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36 | dec op |
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37 | cmp op, 63 |
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38 | jna @f |
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39 | mov op, 63 |
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40 | @@: |
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41 | } |
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42 | |||
43 | align 4 |
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44 | md: |
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45 | .add_to_used: |
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46 | mov eax, [esi+block_base] |
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47 | mov ebx, [esi+block_base] |
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48 | shr ebx, 6 |
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49 | add eax, ebx |
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50 | shr ebx, 6 |
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51 | add eax, ebx |
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52 | shr eax, 12 |
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53 | and eax, 63 |
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54 | inc [mem_hash_cnt+eax*4] |
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55 | |||
56 | lea ecx, [mem_used_list+eax*8] |
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3246 | Serge | 57 | list_add esi, ecx |
2288 | clevermous | 58 | mov [esi+block_flags], USED_BLOCK |
59 | mov eax, [esi+block_size] |
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60 | sub [heap_free], eax |
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61 | ret |
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62 | align 4 |
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63 | .find_used: |
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64 | mov ecx, eax |
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65 | mov ebx, eax |
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66 | shr ebx, 6 |
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67 | add ecx, ebx |
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68 | shr ebx, 6 |
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69 | add ecx, ebx |
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70 | shr ecx, 12 |
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71 | and ecx, 63 |
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72 | |||
73 | lea ebx, [mem_used_list+ecx*8] |
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74 | mov esi, ebx |
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75 | .next: |
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76 | mov esi, [esi+list_fd] |
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77 | cmp esi, ebx |
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78 | je .fail |
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79 | |||
80 | cmp eax, [esi+block_base] |
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81 | jne .next |
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82 | |||
83 | ret |
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84 | .fail: |
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85 | xor esi, esi |
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86 | ret |
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87 | |||
88 | align 4 |
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89 | .del_from_used: |
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90 | call .find_used |
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91 | test esi, esi |
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92 | jz .done |
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93 | |||
94 | cmp [esi+block_flags], USED_BLOCK |
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95 | jne .fatal |
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96 | |||
97 | dec [mem_hash_cnt+ecx*4] |
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3246 | Serge | 98 | list_del esi |
2288 | clevermous | 99 | .done: |
100 | ret |
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101 | .fatal: ;FIXME panic here |
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102 | xor esi, esi |
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103 | ret |
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104 | |||
105 | ;Initial heap state |
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106 | ; |
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107 | ;+heap_size terminator USED_BLOCK |
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108 | ;+4096*MEM_BLOCK.sizeof free space FREE_BLOCK |
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109 | ;HEAP_BASE heap_descriptors USED_BLOCK |
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110 | ; |
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111 | |||
112 | align 4 |
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113 | proc init_kernel_heap |
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114 | |||
115 | mov ecx, 64 |
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116 | mov edi, mem_block_list |
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117 | @@: |
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118 | mov eax, edi |
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119 | stosd |
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120 | stosd |
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121 | loop @B |
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122 | |||
123 | mov ecx, 64 |
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124 | mov edi, mem_used_list |
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125 | @@: |
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126 | mov eax, edi |
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127 | stosd |
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128 | stosd |
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129 | loop @B |
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130 | |||
131 | stdcall alloc_pages, dword 32 |
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132 | mov ecx, 32 |
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133 | mov edx, eax |
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134 | mov edi, HEAP_BASE |
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135 | .l1: |
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136 | stdcall map_page, edi, edx, PG_SW |
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137 | add edi, 0x1000 |
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138 | add edx, 0x1000 |
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139 | dec ecx |
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140 | jnz .l1 |
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141 | |||
142 | mov edi, HEAP_BASE ;descriptors |
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2384 | hidnplayr | 143 | mov ebx, HEAP_BASE+sizeof.MEM_BLOCK ;free space |
144 | mov ecx, HEAP_BASE+sizeof.MEM_BLOCK*2 ;terminator |
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2288 | clevermous | 145 | |
146 | xor eax, eax |
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147 | mov [edi+block_next], ebx |
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148 | mov [edi+block_prev], eax |
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149 | mov [edi+list_fd], eax |
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150 | mov [edi+list_bk], eax |
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151 | mov [edi+block_base], HEAP_BASE |
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2384 | hidnplayr | 152 | mov [edi+block_size], 4096*sizeof.MEM_BLOCK |
2288 | clevermous | 153 | mov [edi+block_flags], USED_BLOCK |
154 | |||
155 | mov [ecx+block_next], eax |
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156 | mov [ecx+block_prev], ebx |
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3371 | clevermous | 157 | mov [ecx+list_fd], eax |
158 | mov [ecx+list_bk], eax |
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159 | mov [ecx+block_base], eax |
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160 | mov [ecx+block_size], eax |
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161 | mov [ecx+block_flags], USED_BLOCK |
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2288 | clevermous | 162 | |
163 | mov [ebx+block_next], ecx |
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164 | mov [ebx+block_prev], edi |
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2384 | hidnplayr | 165 | mov [ebx+block_base], HEAP_BASE+4096*sizeof.MEM_BLOCK |
2288 | clevermous | 166 | |
167 | mov ecx, [pg_data.kernel_pages] |
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168 | shl ecx, 12 |
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2384 | hidnplayr | 169 | sub ecx, HEAP_BASE-OS_BASE+4096*sizeof.MEM_BLOCK |
2288 | clevermous | 170 | mov [heap_size], ecx |
171 | mov [heap_free], ecx |
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172 | mov [ebx+block_size], ecx |
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173 | mov [ebx+block_flags], FREE_BLOCK |
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174 | |||
175 | mov [mem_block_mask], eax |
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176 | mov [mem_block_mask+4], 0x80000000 |
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177 | |||
178 | mov ecx, mem_block_list+63*8 |
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3246 | Serge | 179 | list_add ebx, ecx |
2288 | clevermous | 180 | |
181 | mov ecx, 4096-3-1 |
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2384 | hidnplayr | 182 | mov eax, HEAP_BASE+sizeof.MEM_BLOCK*4 |
2288 | clevermous | 183 | |
2384 | hidnplayr | 184 | mov [next_memblock], HEAP_BASE+sizeof.MEM_BLOCK *3 |
2288 | clevermous | 185 | @@: |
2384 | hidnplayr | 186 | mov [eax-sizeof.MEM_BLOCK], eax |
187 | add eax, sizeof.MEM_BLOCK |
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2288 | clevermous | 188 | loop @B |
189 | |||
2384 | hidnplayr | 190 | mov [eax-sizeof.MEM_BLOCK], dword 0 |
2288 | clevermous | 191 | |
192 | mov ecx, heap_mutex |
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193 | call mutex_init |
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194 | mov [heap_blocks], 4094 |
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195 | mov [free_blocks], 4093 |
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196 | ret |
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197 | endp |
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198 | |||
199 | ; param |
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200 | ; eax= required size |
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201 | ; |
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202 | ; retval |
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203 | ; edi= memory block descriptor |
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204 | ; ebx= descriptor index |
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205 | |||
206 | align 4 |
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207 | get_small_block: |
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208 | mov ecx, eax |
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209 | shr ecx, 12 |
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210 | dec ecx |
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211 | cmp ecx, 63 |
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212 | jle .get_index |
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213 | mov ecx, 63 |
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214 | .get_index: |
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215 | lea esi, [mem_block_mask] |
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216 | xor ebx, ebx |
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217 | or edx, -1 |
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218 | |||
219 | cmp ecx, 32 |
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220 | jb .bit_test |
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221 | |||
222 | sub ecx, 32 |
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223 | add ebx, 32 |
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224 | add esi, 4 |
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225 | .bit_test: |
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226 | shl edx, cl |
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227 | and edx, [esi] |
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228 | .find: |
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229 | bsf edi, edx |
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230 | jz .high_mask |
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231 | add ebx, edi |
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232 | lea ecx, [mem_block_list+ebx*8] |
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233 | mov edi, ecx |
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234 | .next: |
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235 | mov edi, [edi+list_fd] |
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236 | cmp edi, ecx |
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237 | je .err |
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238 | cmp eax, [edi+block_size] |
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239 | ja .next |
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240 | ret |
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241 | .err: |
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242 | xor edi, edi |
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243 | ret |
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244 | |||
245 | .high_mask: |
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246 | add esi, 4 |
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247 | cmp esi, mem_block_mask+8 |
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248 | jae .err |
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249 | add ebx, 32 |
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250 | mov edx, [esi] |
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251 | jmp .find |
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252 | |||
253 | |||
254 | align 4 |
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255 | free_mem_block: |
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256 | mov ebx, [next_memblock] |
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257 | mov [eax], ebx |
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258 | mov [next_memblock], eax |
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259 | xor ebx, ebx |
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260 | |||
261 | mov dword [eax+4], ebx |
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262 | mov dword [eax+8], ebx |
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263 | mov dword [eax+12], ebx |
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264 | mov dword [eax+16], ebx |
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265 | ; mov dword [eax+20], 0 ;don't clear block size |
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266 | mov dword [eax+24], ebx |
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267 | mov dword [eax+28], ebx |
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268 | inc [free_blocks] |
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269 | ret |
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270 | |||
271 | align 4 |
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272 | proc alloc_kernel_space stdcall, size:dword |
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273 | local block_ind:DWORD |
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274 | |||
275 | push ebx |
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276 | push esi |
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277 | push edi |
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278 | |||
279 | mov eax, [size] |
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280 | add eax, 4095 |
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281 | and eax, not 4095 |
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282 | mov [size], eax |
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283 | |||
284 | cmp eax, [heap_free] |
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285 | ja .error |
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286 | |||
287 | mov ecx, heap_mutex |
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288 | call mutex_lock |
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289 | |||
290 | mov eax, [size] |
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291 | |||
292 | call get_small_block ; eax |
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293 | test edi, edi |
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294 | jz .error_unlock |
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295 | |||
296 | cmp [edi+block_flags], FREE_BLOCK |
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297 | jne .error_unlock |
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298 | |||
299 | mov [block_ind], ebx ;index of allocated block |
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300 | |||
301 | mov eax, [edi+block_size] |
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302 | cmp eax, [size] |
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303 | je .m_eq_size |
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304 | |||
305 | mov esi, [next_memblock] ;new memory block |
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306 | test esi, esi |
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307 | jz .error_unlock |
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308 | |||
309 | dec [free_blocks] |
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310 | mov eax, [esi] |
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311 | mov [next_memblock], eax |
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312 | |||
313 | mov [esi+block_next], edi |
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314 | mov eax, [edi+block_prev] |
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315 | mov [esi+block_prev], eax |
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316 | mov [edi+block_prev], esi |
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317 | mov [esi+list_fd], 0 |
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318 | mov [esi+list_bk], 0 |
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319 | mov [eax+block_next], esi |
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320 | |||
321 | mov ebx, [edi+block_base] |
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322 | mov [esi+block_base], ebx |
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323 | mov edx, [size] |
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324 | mov [esi+block_size], edx |
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325 | add [edi+block_base], edx |
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326 | sub [edi+block_size], edx |
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327 | |||
328 | mov eax, [edi+block_size] |
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329 | calc_index eax |
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330 | cmp eax, [block_ind] |
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331 | je .add_used |
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332 | |||
333 | list_del edi |
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334 | |||
335 | mov ecx, [block_ind] |
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336 | lea edx, [mem_block_list+ecx*8] |
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337 | cmp edx, [edx] |
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338 | jnz @f |
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339 | btr [mem_block_mask], ecx |
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340 | @@: |
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341 | bts [mem_block_mask], eax |
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342 | lea edx, [mem_block_list+eax*8] ;edx= list head |
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343 | list_add edi, edx |
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344 | .add_used: |
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345 | |||
346 | call md.add_to_used |
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347 | |||
348 | mov ecx, heap_mutex |
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349 | call mutex_unlock |
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350 | mov eax, [esi+block_base] |
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351 | pop edi |
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352 | pop esi |
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353 | pop ebx |
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354 | ret |
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355 | |||
356 | .m_eq_size: |
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357 | list_del edi |
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358 | lea edx, [mem_block_list+ebx*8] |
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359 | cmp edx, [edx] |
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360 | jnz @f |
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361 | btr [mem_block_mask], ebx |
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362 | @@: |
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363 | mov esi, edi |
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364 | jmp .add_used |
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365 | |||
366 | .error_unlock: |
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367 | mov ecx, heap_mutex |
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368 | call mutex_unlock |
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369 | .error: |
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370 | xor eax, eax |
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371 | pop edi |
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372 | pop esi |
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373 | pop ebx |
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374 | ret |
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375 | endp |
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376 | |||
377 | align 4 |
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378 | proc free_kernel_space stdcall uses ebx ecx edx esi edi, base:dword |
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379 | |||
380 | mov ecx, heap_mutex |
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381 | call mutex_lock |
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382 | |||
383 | mov eax, [base] |
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384 | |||
385 | call md.del_from_used |
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386 | test esi, esi |
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387 | jz .fail |
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388 | |||
389 | mov eax, [esi+block_size] |
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390 | add [heap_free], eax |
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391 | |||
392 | mov edi, [esi+block_next] |
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393 | cmp [edi+block_flags], FREE_BLOCK |
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394 | jne .prev |
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395 | |||
3246 | Serge | 396 | list_del edi |
2288 | clevermous | 397 | |
398 | mov edx, [edi+block_next] |
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399 | mov [esi+block_next], edx |
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400 | mov [edx+block_prev], esi |
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401 | mov ecx, [edi+block_size] |
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402 | add [esi+block_size], ecx |
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403 | |||
3246 | Serge | 404 | calc_index ecx |
2288 | clevermous | 405 | |
406 | lea edx, [mem_block_list+ecx*8] |
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407 | cmp edx, [edx] |
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408 | jne @F |
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409 | btr [mem_block_mask], ecx |
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410 | @@: |
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411 | mov eax, edi |
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412 | call free_mem_block |
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413 | .prev: |
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414 | mov edi, [esi+block_prev] |
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415 | cmp [edi+block_flags], FREE_BLOCK |
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416 | jne .insert |
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417 | |||
418 | mov edx, [esi+block_next] |
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419 | mov [edi+block_next], edx |
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420 | mov [edx+block_prev], edi |
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421 | |||
422 | mov eax, esi |
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423 | call free_mem_block |
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424 | |||
425 | mov ecx, [edi+block_size] |
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426 | mov eax, [esi+block_size] |
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427 | add eax, ecx |
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428 | mov [edi+block_size], eax |
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429 | |||
3246 | Serge | 430 | calc_index eax ;new index |
431 | calc_index ecx ;old index |
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2288 | clevermous | 432 | cmp eax, ecx |
433 | je .m_eq |
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434 | |||
435 | push ecx |
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3246 | Serge | 436 | list_del edi |
2288 | clevermous | 437 | pop ecx |
438 | |||
439 | lea edx, [mem_block_list+ecx*8] |
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440 | cmp edx, [edx] |
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441 | jne .add_block |
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442 | btr [mem_block_mask], ecx |
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3246 | Serge | 443 | |
2288 | clevermous | 444 | .add_block: |
445 | bts [mem_block_mask], eax |
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446 | lea edx, [mem_block_list+eax*8] |
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3246 | Serge | 447 | list_add edi, edx |
2288 | clevermous | 448 | .m_eq: |
449 | mov ecx, heap_mutex |
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450 | call mutex_unlock |
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451 | xor eax, eax |
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452 | not eax |
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453 | ret |
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454 | .insert: |
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455 | mov [esi+block_flags], FREE_BLOCK |
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456 | mov eax, [esi+block_size] |
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3246 | Serge | 457 | calc_index eax |
2288 | clevermous | 458 | mov edi, esi |
459 | jmp .add_block |
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460 | |||
461 | .fail: |
||
462 | mov ecx, heap_mutex |
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463 | call mutex_unlock |
||
464 | xor eax, eax |
||
465 | ret |
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466 | endp |
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467 | |||
468 | align 4 |
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469 | proc kernel_alloc stdcall, size:dword |
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3246 | Serge | 470 | locals |
471 | lin_addr dd ? |
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472 | pages_count dd ? |
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473 | endl |
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2288 | clevermous | 474 | |
475 | push ebx |
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476 | push edi |
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477 | |||
478 | mov eax, [size] |
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479 | add eax, 4095 |
||
480 | and eax, not 4095; |
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481 | mov [size], eax |
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482 | and eax, eax |
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483 | jz .err |
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484 | mov ebx, eax |
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485 | shr ebx, 12 |
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486 | mov [pages_count], ebx |
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487 | |||
488 | stdcall alloc_kernel_space, eax |
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489 | test eax, eax |
||
490 | jz .err |
||
491 | mov [lin_addr], eax |
||
492 | |||
493 | mov ecx, [pages_count] |
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494 | mov edx, eax |
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495 | mov ebx, ecx |
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496 | |||
497 | shr ecx, 3 |
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498 | jz .next |
||
499 | |||
500 | and ebx, not 7 |
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501 | push ebx |
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502 | stdcall alloc_pages, ebx |
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503 | pop ecx ; yes ecx!!! |
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504 | and eax, eax |
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505 | jz .err |
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506 | |||
507 | mov edi, eax |
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508 | mov edx, [lin_addr] |
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509 | @@: |
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510 | stdcall map_page, edx, edi, dword PG_SW |
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511 | add edx, 0x1000 |
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512 | add edi, 0x1000 |
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513 | dec ecx |
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514 | jnz @B |
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515 | .next: |
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516 | mov ecx, [pages_count] |
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517 | and ecx, 7 |
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518 | jz .end |
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519 | @@: |
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520 | push ecx |
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521 | call alloc_page |
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522 | pop ecx |
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523 | test eax, eax |
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524 | jz .err |
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525 | |||
526 | stdcall map_page, edx, eax, dword PG_SW |
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527 | add edx, 0x1000 |
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528 | dec ecx |
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529 | jnz @B |
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530 | .end: |
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531 | mov eax, [lin_addr] |
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532 | pop edi |
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533 | pop ebx |
||
534 | ret |
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535 | .err: |
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536 | xor eax, eax |
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537 | pop edi |
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538 | pop ebx |
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539 | ret |
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540 | endp |
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541 | |||
542 | align 4 |
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543 | proc kernel_free stdcall, base:dword |
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544 | |||
545 | push ebx esi |
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546 | |||
547 | mov ecx, heap_mutex |
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548 | call mutex_lock |
||
549 | |||
550 | mov eax, [base] |
||
551 | call md.find_used |
||
552 | |||
553 | mov ecx, heap_mutex |
||
554 | cmp [esi+block_flags], USED_BLOCK |
||
555 | jne .fail |
||
556 | |||
557 | call mutex_unlock |
||
558 | |||
559 | mov eax, [esi+block_base] |
||
560 | mov ecx, [esi+block_size] |
||
561 | shr ecx, 12 |
||
562 | call release_pages ;eax, ecx |
||
563 | stdcall free_kernel_space, [base] |
||
564 | pop esi ebx |
||
565 | ret |
||
566 | .fail: |
||
567 | call mutex_unlock |
||
568 | xor eax, eax |
||
569 | pop esi ebx |
||
570 | ret |
||
571 | endp |
||
572 | |||
573 | restore block_next |
||
574 | restore block_prev |
||
575 | restore block_list |
||
576 | restore block_base |
||
577 | restore block_size |
||
578 | restore block_flags |
||
579 | |||
580 | ;;;;;;;;;;;;;; USER ;;;;;;;;;;;;;;;;; |
||
581 | |||
2412 | Serge | 582 | HEAP_TOP equ 0x80000000 |
2288 | clevermous | 583 | |
584 | align 4 |
||
585 | proc init_heap |
||
586 | |||
587 | mov ebx, [current_slot] |
||
588 | mov eax, [ebx+APPDATA.heap_top] |
||
589 | test eax, eax |
||
590 | jz @F |
||
591 | sub eax, [ebx+APPDATA.heap_base] |
||
592 | sub eax, 4096 |
||
593 | ret |
||
594 | @@: |
||
595 | mov esi, [ebx+APPDATA.mem_size] |
||
596 | add esi, 4095 |
||
597 | and esi, not 4095 |
||
598 | mov [ebx+APPDATA.mem_size], esi |
||
599 | mov eax, HEAP_TOP |
||
600 | mov [ebx+APPDATA.heap_base], esi |
||
601 | mov [ebx+APPDATA.heap_top], eax |
||
602 | |||
603 | sub eax, esi |
||
604 | shr esi, 10 |
||
605 | mov ecx, eax |
||
606 | sub eax, 4096 |
||
607 | or ecx, FREE_BLOCK |
||
608 | mov [page_tabs+esi], ecx |
||
609 | ret |
||
610 | endp |
||
611 | |||
612 | align 4 |
||
613 | proc user_alloc stdcall, alloc_size:dword |
||
614 | |||
615 | push ebx |
||
616 | push esi |
||
617 | push edi |
||
618 | |||
619 | mov ecx, [alloc_size] |
||
620 | add ecx, (4095+4096) |
||
621 | and ecx, not 4095 |
||
622 | |||
623 | mov ebx, [current_slot] |
||
624 | mov esi, dword [ebx+APPDATA.heap_base] ; heap_base |
||
625 | mov edi, dword [ebx+APPDATA.heap_top] ; heap_top |
||
626 | l_0: |
||
627 | cmp esi, edi |
||
628 | jae m_exit |
||
629 | |||
630 | mov ebx, esi |
||
631 | shr ebx, 12 |
||
632 | mov eax, [page_tabs+ebx*4] |
||
633 | test al, FREE_BLOCK |
||
634 | jz test_used |
||
635 | and eax, 0xFFFFF000 |
||
636 | cmp eax, ecx ;alloc_size |
||
637 | jb m_next |
||
638 | jz @f |
||
639 | |||
640 | lea edx, [esi+ecx] |
||
641 | sub eax, ecx |
||
642 | or al, FREE_BLOCK |
||
643 | shr edx, 12 |
||
644 | mov [page_tabs+edx*4], eax |
||
645 | @@: |
||
646 | or ecx, USED_BLOCK |
||
647 | mov [page_tabs+ebx*4], ecx |
||
648 | shr ecx, 12 |
||
649 | inc ebx |
||
650 | dec ecx |
||
651 | jz .no |
||
652 | @@: |
||
653 | mov dword [page_tabs+ebx*4], 2 |
||
654 | inc ebx |
||
655 | dec ecx |
||
656 | jnz @B |
||
657 | .no: |
||
658 | |||
659 | mov edx, [current_slot] |
||
660 | mov ebx, [alloc_size] |
||
661 | add ebx, 0xFFF |
||
662 | and ebx, not 0xFFF |
||
663 | add ebx, [edx+APPDATA.mem_size] |
||
664 | call update_mem_size |
||
665 | |||
666 | lea eax, [esi+4096] |
||
667 | |||
668 | pop edi |
||
669 | pop esi |
||
670 | pop ebx |
||
671 | ret |
||
672 | test_used: |
||
673 | test al, USED_BLOCK |
||
674 | jz m_exit |
||
675 | |||
676 | and eax, 0xFFFFF000 |
||
677 | m_next: |
||
678 | add esi, eax |
||
679 | jmp l_0 |
||
680 | m_exit: |
||
681 | xor eax, eax |
||
682 | pop edi |
||
683 | pop esi |
||
684 | pop ebx |
||
685 | ret |
||
686 | endp |
||
687 | |||
688 | align 4 |
||
689 | proc user_alloc_at stdcall, address:dword, alloc_size:dword |
||
690 | |||
691 | push ebx |
||
692 | push esi |
||
693 | push edi |
||
694 | |||
695 | mov ebx, [current_slot] |
||
696 | mov edx, [address] |
||
697 | and edx, not 0xFFF |
||
698 | mov [address], edx |
||
699 | sub edx, 0x1000 |
||
700 | jb .error |
||
701 | mov esi, [ebx+APPDATA.heap_base] |
||
702 | mov edi, [ebx+APPDATA.heap_top] |
||
703 | cmp edx, esi |
||
704 | jb .error |
||
705 | .scan: |
||
706 | cmp esi, edi |
||
707 | jae .error |
||
708 | mov ebx, esi |
||
709 | shr ebx, 12 |
||
710 | mov eax, [page_tabs+ebx*4] |
||
711 | mov ecx, eax |
||
712 | and ecx, 0xFFFFF000 |
||
713 | add ecx, esi |
||
714 | cmp edx, ecx |
||
715 | jb .found |
||
716 | mov esi, ecx |
||
717 | jmp .scan |
||
718 | .error: |
||
719 | xor eax, eax |
||
720 | pop edi |
||
721 | pop esi |
||
722 | pop ebx |
||
723 | ret |
||
724 | .found: |
||
725 | test al, FREE_BLOCK |
||
726 | jz .error |
||
727 | mov eax, ecx |
||
728 | sub eax, edx |
||
729 | sub eax, 0x1000 |
||
730 | cmp eax, [alloc_size] |
||
731 | jb .error |
||
732 | |||
733 | ; Here we have 1 big free block which includes requested area. |
||
734 | ; In general, 3 other blocks must be created instead: |
||
735 | ; free at [esi, edx); |
||
736 | ; busy at [edx, edx+0x1000+ALIGN_UP(alloc_size,0x1000)); |
||
737 | ; free at [edx+0x1000+ALIGN_UP(alloc_size,0x1000), ecx) |
||
738 | ; First or third block (or both) may be absent. |
||
739 | mov eax, edx |
||
740 | sub eax, esi |
||
741 | jz .nofirst |
||
742 | or al, FREE_BLOCK |
||
743 | mov [page_tabs+ebx*4], eax |
||
744 | .nofirst: |
||
745 | mov eax, [alloc_size] |
||
746 | add eax, 0x1FFF |
||
747 | and eax, not 0xFFF |
||
748 | mov ebx, edx |
||
749 | add edx, eax |
||
750 | shr ebx, 12 |
||
751 | or al, USED_BLOCK |
||
752 | mov [page_tabs+ebx*4], eax |
||
753 | shr eax, 12 |
||
754 | dec eax |
||
755 | jz .second_nofill |
||
756 | inc ebx |
||
757 | .fill: |
||
758 | mov dword [page_tabs+ebx*4], 2 |
||
759 | inc ebx |
||
760 | dec eax |
||
761 | jnz .fill |
||
3246 | Serge | 762 | |
2288 | clevermous | 763 | .second_nofill: |
764 | sub ecx, edx |
||
765 | jz .nothird |
||
766 | or cl, FREE_BLOCK |
||
767 | mov [page_tabs+ebx*4], ecx |
||
3246 | Serge | 768 | |
2288 | clevermous | 769 | .nothird: |
770 | |||
771 | mov edx, [current_slot] |
||
772 | mov ebx, [alloc_size] |
||
773 | add ebx, 0xFFF |
||
774 | and ebx, not 0xFFF |
||
775 | add ebx, [edx+APPDATA.mem_size] |
||
776 | call update_mem_size |
||
777 | |||
778 | mov eax, [address] |
||
779 | |||
780 | pop edi |
||
781 | pop esi |
||
782 | pop ebx |
||
783 | ret |
||
784 | endp |
||
785 | |||
786 | align 4 |
||
787 | proc user_free stdcall, base:dword |
||
788 | |||
789 | push esi |
||
790 | |||
791 | mov esi, [base] |
||
792 | test esi, esi |
||
793 | jz .exit |
||
794 | |||
795 | push ebx |
||
796 | |||
797 | xor ebx, ebx |
||
798 | shr esi, 12 |
||
799 | mov eax, [page_tabs+(esi-1)*4] |
||
800 | test al, USED_BLOCK |
||
801 | jz .cantfree |
||
802 | test al, DONT_FREE_BLOCK |
||
803 | jnz .cantfree |
||
804 | |||
805 | and eax, not 4095 |
||
806 | mov ecx, eax |
||
807 | or al, FREE_BLOCK |
||
808 | mov [page_tabs+(esi-1)*4], eax |
||
809 | sub ecx, 4096 |
||
810 | mov ebx, ecx |
||
811 | shr ecx, 12 |
||
812 | jz .released |
||
813 | .release: |
||
814 | xor eax, eax |
||
815 | xchg eax, [page_tabs+esi*4] |
||
816 | test al, 1 |
||
817 | jz @F |
||
818 | test eax, PG_SHARED |
||
819 | jnz @F |
||
820 | call free_page |
||
821 | mov eax, esi |
||
822 | shl eax, 12 |
||
823 | invlpg [eax] |
||
824 | @@: |
||
825 | inc esi |
||
826 | dec ecx |
||
827 | jnz .release |
||
3246 | Serge | 828 | |
2288 | clevermous | 829 | .released: |
830 | push edi |
||
831 | |||
832 | mov edx, [current_slot] |
||
833 | mov esi, dword [edx+APPDATA.heap_base] |
||
834 | mov edi, dword [edx+APPDATA.heap_top] |
||
835 | sub ebx, [edx+APPDATA.mem_size] |
||
836 | neg ebx |
||
837 | call update_mem_size |
||
838 | call user_normalize |
||
839 | pop edi |
||
840 | pop ebx |
||
841 | pop esi |
||
842 | ret |
||
843 | .exit: |
||
844 | xor eax, eax |
||
845 | inc eax |
||
846 | pop esi |
||
847 | ret |
||
848 | .cantfree: |
||
849 | xor eax, eax |
||
850 | pop ebx |
||
851 | pop esi |
||
852 | ret |
||
853 | endp |
||
854 | |||
2400 | Serge | 855 | |
856 | align 4 |
||
857 | proc user_unmap stdcall, base:dword, offset:dword, size:dword |
||
858 | |||
859 | push ebx |
||
860 | |||
861 | mov ebx, [base] ; must be valid pointer |
||
862 | test ebx, ebx |
||
863 | jz .error |
||
864 | |||
865 | mov edx, [offset] ; check offset |
||
866 | add edx, ebx ; must be below 2Gb app limit |
||
867 | js .error |
||
868 | |||
869 | shr ebx, 12 ; chek block attributes |
||
870 | lea ebx, [page_tabs+ebx*4] |
||
871 | mov eax, [ebx-4] ; block attributes |
||
872 | test al, USED_BLOCK |
||
873 | jz .error |
||
874 | test al, DONT_FREE_BLOCK |
||
875 | jnz .error |
||
876 | |||
877 | shr edx, 12 |
||
878 | lea edx, [page_tabs+edx*4] ; unmap offset |
||
879 | |||
880 | mov ecx, [size] |
||
881 | add ecx, 4095 |
||
882 | shr ecx, 12 ; unmap size in pages |
||
883 | |||
884 | shr eax, 12 ; block size + 1 page |
||
885 | lea ebx, [ebx+eax*4-4] ; block end ptr |
||
886 | lea eax, [edx+ecx*4] ; unmap end ptr |
||
887 | |||
888 | cmp eax, ebx ; check for overflow |
||
889 | ja .error |
||
890 | |||
891 | mov ebx, [offset] |
||
892 | and ebx, not 4095 ; is it required ? |
||
3798 | Serge | 893 | add ebx, [base] |
2400 | Serge | 894 | |
895 | .unmap: |
||
896 | mov eax, [edx] ; get page addres |
||
897 | test al, 1 ; page mapped ? |
||
898 | jz @F |
||
899 | test eax, PG_SHARED ; page shared ? |
||
900 | jnz @F |
||
3798 | Serge | 901 | mov [edx], dword 2 |
2400 | Serge | 902 | ; mark page as reserved |
903 | invlpg [ebx] ; when we start using |
||
904 | call free_page ; empty c-o-w page instead this ? |
||
905 | @@: |
||
906 | add ebx, 4096 |
||
907 | add edx, 4 |
||
908 | dec ecx |
||
909 | jnz .unmap |
||
910 | |||
911 | pop ebx |
||
912 | or al, 1 ; return non zero on success |
||
913 | ret |
||
914 | .error: |
||
915 | pop ebx |
||
916 | xor eax, eax ; something wrong |
||
917 | ret |
||
918 | endp |
||
919 | |||
920 | align 4 |
||
2288 | clevermous | 921 | user_normalize: |
922 | ; in: esi=heap_base, edi=heap_top |
||
923 | ; out: eax=0 <=> OK |
||
924 | ; destroys: ebx,edx,esi,edi |
||
925 | shr esi, 12 |
||
926 | shr edi, 12 |
||
927 | @@: |
||
928 | mov eax, [page_tabs+esi*4] |
||
929 | test al, USED_BLOCK |
||
930 | jz .test_free |
||
931 | shr eax, 12 |
||
932 | add esi, eax |
||
933 | jmp @B |
||
934 | .test_free: |
||
935 | test al, FREE_BLOCK |
||
936 | jz .err |
||
937 | mov edx, eax |
||
938 | shr edx, 12 |
||
939 | add edx, esi |
||
940 | cmp edx, edi |
||
941 | jae .exit |
||
942 | |||
943 | mov ebx, [page_tabs+edx*4] |
||
944 | test bl, USED_BLOCK |
||
945 | jz .next_free |
||
946 | |||
947 | shr ebx, 12 |
||
948 | add edx, ebx |
||
949 | mov esi, edx |
||
950 | jmp @B |
||
951 | .next_free: |
||
952 | test bl, FREE_BLOCK |
||
953 | jz .err |
||
954 | and dword [page_tabs+edx*4], 0 |
||
955 | add eax, ebx |
||
956 | and eax, not 4095 |
||
957 | or eax, FREE_BLOCK |
||
958 | mov [page_tabs+esi*4], eax |
||
959 | jmp @B |
||
960 | .exit: |
||
961 | xor eax, eax |
||
962 | inc eax |
||
963 | ret |
||
964 | .err: |
||
965 | xor eax, eax |
||
966 | ret |
||
967 | |||
968 | user_realloc: |
||
969 | ; in: eax = pointer, ebx = new size |
||
970 | ; out: eax = new pointer or NULL |
||
971 | test eax, eax |
||
972 | jnz @f |
||
973 | ; realloc(NULL,sz) - same as malloc(sz) |
||
974 | push ebx |
||
975 | call user_alloc |
||
976 | ret |
||
977 | @@: |
||
978 | push ecx edx |
||
979 | lea ecx, [eax - 0x1000] |
||
980 | shr ecx, 12 |
||
981 | mov edx, [page_tabs+ecx*4] |
||
982 | test dl, USED_BLOCK |
||
983 | jnz @f |
||
984 | ; attempt to realloc invalid pointer |
||
985 | .ret0: |
||
986 | pop edx ecx |
||
987 | xor eax, eax |
||
988 | ret |
||
989 | @@: |
||
990 | test dl, DONT_FREE_BLOCK |
||
991 | jnz .ret0 |
||
992 | add ebx, 0x1FFF |
||
993 | shr edx, 12 |
||
994 | shr ebx, 12 |
||
995 | ; edx = allocated size, ebx = new size |
||
996 | add edx, ecx |
||
997 | add ebx, ecx |
||
998 | cmp edx, ebx |
||
999 | jb .realloc_add |
||
1000 | ; release part of allocated memory |
||
1001 | .loop: |
||
1002 | cmp edx, ebx |
||
1003 | jz .release_done |
||
1004 | dec edx |
||
1005 | xor eax, eax |
||
1006 | xchg eax, [page_tabs+edx*4] |
||
1007 | test al, 1 |
||
1008 | jz .loop |
||
1009 | call free_page |
||
1010 | mov eax, edx |
||
1011 | shl eax, 12 |
||
1012 | invlpg [eax] |
||
1013 | jmp .loop |
||
1014 | .release_done: |
||
1015 | sub ebx, ecx |
||
1016 | cmp ebx, 1 |
||
1017 | jnz .nofreeall |
||
1018 | mov eax, [page_tabs+ecx*4] |
||
1019 | and eax, not 0xFFF |
||
1020 | mov edx, [current_slot] |
||
1021 | mov ebx, [APPDATA.mem_size+edx] |
||
1022 | sub ebx, eax |
||
1023 | add ebx, 0x1000 |
||
1024 | or al, FREE_BLOCK |
||
1025 | mov [page_tabs+ecx*4], eax |
||
1026 | push esi edi |
||
1027 | mov esi, [APPDATA.heap_base+edx] |
||
1028 | mov edi, [APPDATA.heap_top+edx] |
||
1029 | call update_mem_size |
||
1030 | call user_normalize |
||
1031 | pop edi esi |
||
1032 | jmp .ret0 ; all freed |
||
1033 | .nofreeall: |
||
1034 | sub edx, ecx |
||
1035 | shl ebx, 12 |
||
1036 | or ebx, USED_BLOCK |
||
1037 | xchg [page_tabs+ecx*4], ebx |
||
1038 | shr ebx, 12 |
||
1039 | sub ebx, edx |
||
1040 | push ebx ecx edx |
||
1041 | mov edx, [current_slot] |
||
1042 | shl ebx, 12 |
||
1043 | sub ebx, [APPDATA.mem_size+edx] |
||
1044 | neg ebx |
||
1045 | call update_mem_size |
||
1046 | pop edx ecx ebx |
||
1047 | lea eax, [ecx+1] |
||
1048 | shl eax, 12 |
||
1049 | push eax |
||
1050 | add ecx, edx |
||
1051 | lea edx, [ecx+ebx] |
||
1052 | shl ebx, 12 |
||
1053 | jz .ret |
||
1054 | push esi |
||
1055 | mov esi, [current_slot] |
||
1056 | mov esi, [APPDATA.heap_top+esi] |
||
1057 | shr esi, 12 |
||
1058 | @@: |
||
1059 | cmp edx, esi |
||
1060 | jae .merge_done |
||
1061 | mov eax, [page_tabs+edx*4] |
||
1062 | test al, USED_BLOCK |
||
1063 | jnz .merge_done |
||
1064 | and dword [page_tabs+edx*4], 0 |
||
1065 | shr eax, 12 |
||
1066 | add edx, eax |
||
1067 | shl eax, 12 |
||
1068 | add ebx, eax |
||
1069 | jmp @b |
||
1070 | .merge_done: |
||
1071 | pop esi |
||
1072 | or ebx, FREE_BLOCK |
||
1073 | mov [page_tabs+ecx*4], ebx |
||
1074 | .ret: |
||
1075 | pop eax edx ecx |
||
1076 | ret |
||
1077 | .realloc_add: |
||
1078 | ; get some additional memory |
||
1079 | mov eax, [current_slot] |
||
1080 | mov eax, [APPDATA.heap_top+eax] |
||
1081 | shr eax, 12 |
||
1082 | cmp edx, eax |
||
1083 | jae .cant_inplace |
||
1084 | mov eax, [page_tabs+edx*4] |
||
1085 | test al, FREE_BLOCK |
||
1086 | jz .cant_inplace |
||
1087 | shr eax, 12 |
||
1088 | add eax, edx |
||
1089 | sub eax, ebx |
||
1090 | jb .cant_inplace |
||
1091 | jz @f |
||
1092 | shl eax, 12 |
||
1093 | or al, FREE_BLOCK |
||
1094 | mov [page_tabs+ebx*4], eax |
||
1095 | @@: |
||
1096 | mov eax, ebx |
||
1097 | sub eax, ecx |
||
1098 | shl eax, 12 |
||
1099 | or al, USED_BLOCK |
||
1100 | mov [page_tabs+ecx*4], eax |
||
1101 | lea eax, [ecx+1] |
||
1102 | shl eax, 12 |
||
1103 | push eax |
||
1104 | push edi |
||
1105 | lea edi, [page_tabs+edx*4] |
||
1106 | mov eax, 2 |
||
1107 | sub ebx, edx |
||
1108 | mov ecx, ebx |
||
1109 | cld |
||
1110 | rep stosd |
||
1111 | pop edi |
||
1112 | mov edx, [current_slot] |
||
1113 | shl ebx, 12 |
||
1114 | add ebx, [APPDATA.mem_size+edx] |
||
1115 | call update_mem_size |
||
1116 | pop eax edx ecx |
||
1117 | ret |
||
1118 | .cant_inplace: |
||
1119 | push esi edi |
||
1120 | mov eax, [current_slot] |
||
1121 | mov esi, [APPDATA.heap_base+eax] |
||
1122 | mov edi, [APPDATA.heap_top+eax] |
||
1123 | shr esi, 12 |
||
1124 | shr edi, 12 |
||
1125 | sub ebx, ecx |
||
1126 | .find_place: |
||
1127 | cmp esi, edi |
||
1128 | jae .place_not_found |
||
1129 | mov eax, [page_tabs+esi*4] |
||
1130 | test al, FREE_BLOCK |
||
1131 | jz .next_place |
||
1132 | shr eax, 12 |
||
1133 | cmp eax, ebx |
||
1134 | jae .place_found |
||
1135 | add esi, eax |
||
1136 | jmp .find_place |
||
1137 | .next_place: |
||
1138 | shr eax, 12 |
||
1139 | add esi, eax |
||
1140 | jmp .find_place |
||
1141 | .place_not_found: |
||
1142 | pop edi esi |
||
1143 | jmp .ret0 |
||
1144 | .place_found: |
||
1145 | sub eax, ebx |
||
1146 | jz @f |
||
1147 | push esi |
||
1148 | add esi, ebx |
||
1149 | shl eax, 12 |
||
1150 | or al, FREE_BLOCK |
||
1151 | mov [page_tabs+esi*4], eax |
||
1152 | pop esi |
||
1153 | @@: |
||
1154 | mov eax, ebx |
||
1155 | shl eax, 12 |
||
1156 | or al, USED_BLOCK |
||
1157 | mov [page_tabs+esi*4], eax |
||
1158 | inc esi |
||
1159 | mov eax, esi |
||
1160 | shl eax, 12 |
||
1161 | push eax |
||
1162 | mov eax, [page_tabs+ecx*4] |
||
1163 | and eax, not 0xFFF |
||
1164 | or al, FREE_BLOCK |
||
1165 | sub edx, ecx |
||
1166 | mov [page_tabs+ecx*4], eax |
||
1167 | inc ecx |
||
1168 | dec ebx |
||
1169 | dec edx |
||
1170 | jz .no |
||
1171 | @@: |
||
1172 | xor eax, eax |
||
1173 | xchg eax, [page_tabs+ecx*4] |
||
1174 | mov [page_tabs+esi*4], eax |
||
1175 | mov eax, ecx |
||
1176 | shl eax, 12 |
||
1177 | invlpg [eax] |
||
1178 | inc esi |
||
1179 | inc ecx |
||
1180 | dec ebx |
||
1181 | dec edx |
||
1182 | jnz @b |
||
1183 | .no: |
||
1184 | push ebx |
||
1185 | mov edx, [current_slot] |
||
1186 | shl ebx, 12 |
||
1187 | add ebx, [APPDATA.mem_size+edx] |
||
1188 | call update_mem_size |
||
1189 | pop ebx |
||
1190 | @@: |
||
1191 | mov dword [page_tabs+esi*4], 2 |
||
1192 | inc esi |
||
1193 | dec ebx |
||
1194 | jnz @b |
||
1195 | pop eax edi esi edx ecx |
||
1196 | ret |
||
1197 | |||
1198 | if 0 |
||
1199 | align 4 |
||
1200 | proc alloc_dll |
||
1201 | pushf |
||
1202 | cli |
||
1203 | bsf eax, [dll_map] |
||
1204 | jnz .find |
||
1205 | popf |
||
1206 | xor eax, eax |
||
1207 | ret |
||
1208 | .find: |
||
1209 | btr [dll_map], eax |
||
1210 | popf |
||
1211 | shl eax, 5 |
||
1212 | add eax, dll_tab |
||
1213 | ret |
||
1214 | endp |
||
1215 | |||
1216 | align 4 |
||
1217 | proc alloc_service |
||
1218 | pushf |
||
1219 | cli |
||
1220 | bsf eax, [srv_map] |
||
1221 | jnz .find |
||
1222 | popf |
||
1223 | xor eax, eax |
||
1224 | ret |
||
1225 | .find: |
||
1226 | btr [srv_map], eax |
||
1227 | popf |
||
1228 | shl eax, 0x02 |
||
1229 | lea eax, [srv_tab+eax+eax*8] ;srv_tab+eax*36 |
||
1230 | ret |
||
1231 | endp |
||
1232 | |||
1233 | end if |
||
1234 | |||
1235 | |||
1236 | ;;;;;;;;;;;;;; SHARED ;;;;;;;;;;;;;;;;; |
||
1237 | |||
1238 | |||
1239 | ; param |
||
1240 | ; eax= shm_map object |
||
1241 | |||
1242 | align 4 |
||
1243 | destroy_smap: |
||
1244 | |||
1245 | pushfd |
||
1246 | cli |
||
1247 | |||
1248 | push esi |
||
1249 | push edi |
||
1250 | |||
1251 | mov edi, eax |
||
1252 | mov esi, [eax+SMAP.parent] |
||
1253 | test esi, esi |
||
1254 | jz .done |
||
1255 | |||
1256 | lock dec [esi+SMEM.refcount] |
||
1257 | jnz .done |
||
1258 | |||
1259 | mov ecx, [esi+SMEM.bk] |
||
1260 | mov edx, [esi+SMEM.fd] |
||
1261 | |||
1262 | mov [ecx+SMEM.fd], edx |
||
1263 | mov [edx+SMEM.bk], ecx |
||
1264 | |||
1265 | stdcall kernel_free, [esi+SMEM.base] |
||
1266 | mov eax, esi |
||
1267 | call free |
||
1268 | .done: |
||
1269 | mov eax, edi |
||
1270 | call destroy_kernel_object |
||
1271 | |||
1272 | pop edi |
||
1273 | pop esi |
||
1274 | popfd |
||
1275 | |||
1276 | ret |
||
1277 | |||
1278 | E_NOTFOUND equ 5 |
||
1279 | E_ACCESS equ 10 |
||
1280 | E_NOMEM equ 30 |
||
1281 | E_PARAM equ 33 |
||
1282 | |||
1283 | SHM_READ equ 0 |
||
1284 | SHM_WRITE equ 1 |
||
1285 | |||
1286 | SHM_ACCESS_MASK equ 3 |
||
1287 | |||
1288 | SHM_OPEN equ (0 shl 2) |
||
1289 | SHM_OPEN_ALWAYS equ (1 shl 2) |
||
1290 | SHM_CREATE equ (2 shl 2) |
||
1291 | |||
1292 | SHM_OPEN_MASK equ (3 shl 2) |
||
1293 | |||
1294 | align 4 |
||
1295 | proc shmem_open stdcall name:dword, size:dword, access:dword |
||
3246 | Serge | 1296 | locals |
1297 | action dd ? |
||
1298 | owner_access dd ? |
||
1299 | mapped dd ? |
||
1300 | endl |
||
2288 | clevermous | 1301 | |
1302 | push ebx |
||
1303 | push esi |
||
1304 | push edi |
||
1305 | |||
1306 | mov [mapped], 0 |
||
1307 | mov [owner_access], 0 |
||
1308 | |||
1309 | pushfd ;mutex required |
||
1310 | cli |
||
1311 | |||
1312 | mov eax, [access] |
||
1313 | and eax, SHM_OPEN_MASK |
||
1314 | mov [action], eax |
||
1315 | |||
1316 | mov ebx, [name] |
||
1317 | test ebx, ebx |
||
1318 | mov edx, E_PARAM |
||
1319 | jz .fail |
||
1320 | |||
1321 | mov esi, [shmem_list.fd] |
||
1322 | align 4 |
||
1323 | @@: |
||
1324 | cmp esi, shmem_list |
||
1325 | je .not_found |
||
1326 | |||
1327 | lea edx, [esi+SMEM.name]; link , base, size |
||
1328 | stdcall strncmp, edx, ebx, 32 |
||
1329 | test eax, eax |
||
1330 | je .found |
||
1331 | |||
1332 | mov esi, [esi+SMEM.fd] |
||
1333 | jmp @B |
||
1334 | |||
1335 | .not_found: |
||
1336 | mov eax, [action] |
||
1337 | |||
1338 | cmp eax, SHM_OPEN |
||
1339 | mov edx, E_NOTFOUND |
||
1340 | je .fail |
||
1341 | |||
1342 | cmp eax, SHM_CREATE |
||
1343 | mov edx, E_PARAM |
||
1344 | je .create_shm |
||
1345 | |||
1346 | cmp eax, SHM_OPEN_ALWAYS |
||
1347 | jne .fail |
||
1348 | |||
1349 | .create_shm: |
||
1350 | |||
1351 | mov ecx, [size] |
||
1352 | test ecx, ecx |
||
1353 | jz .fail |
||
1354 | |||
1355 | add ecx, 4095 |
||
1356 | and ecx, -4096 |
||
1357 | mov [size], ecx |
||
1358 | |||
2384 | hidnplayr | 1359 | mov eax, sizeof.SMEM |
2288 | clevermous | 1360 | call malloc |
1361 | test eax, eax |
||
1362 | mov esi, eax |
||
1363 | mov edx, E_NOMEM |
||
1364 | jz .fail |
||
1365 | |||
1366 | stdcall kernel_alloc, [size] |
||
1367 | test eax, eax |
||
1368 | mov [mapped], eax |
||
1369 | mov edx, E_NOMEM |
||
1370 | jz .cleanup |
||
1371 | |||
1372 | mov ecx, [size] |
||
1373 | mov edx, [access] |
||
1374 | and edx, SHM_ACCESS_MASK |
||
1375 | |||
1376 | mov [esi+SMEM.base], eax |
||
1377 | mov [esi+SMEM.size], ecx |
||
1378 | mov [esi+SMEM.access], edx |
||
1379 | mov [esi+SMEM.refcount], 0 |
||
1380 | mov [esi+SMEM.name+28], 0 |
||
1381 | |||
1382 | lea eax, [esi+SMEM.name] |
||
1383 | stdcall strncpy, eax, [name], 31 |
||
1384 | |||
1385 | mov eax, [shmem_list.fd] |
||
1386 | mov [esi+SMEM.bk], shmem_list |
||
1387 | mov [esi+SMEM.fd], eax |
||
1388 | |||
1389 | mov [eax+SMEM.bk], esi |
||
1390 | mov [shmem_list.fd], esi |
||
1391 | |||
1392 | mov [action], SHM_OPEN |
||
1393 | mov [owner_access], SHM_WRITE |
||
1394 | |||
1395 | .found: |
||
1396 | mov eax, [action] |
||
1397 | |||
1398 | cmp eax, SHM_CREATE |
||
1399 | mov edx, E_ACCESS |
||
1400 | je .exit |
||
1401 | |||
1402 | cmp eax, SHM_OPEN |
||
1403 | mov edx, E_PARAM |
||
1404 | je .create_map |
||
1405 | |||
1406 | cmp eax, SHM_OPEN_ALWAYS |
||
1407 | jne .fail |
||
1408 | |||
1409 | .create_map: |
||
1410 | |||
1411 | mov eax, [access] |
||
1412 | and eax, SHM_ACCESS_MASK |
||
1413 | cmp eax, [esi+SMEM.access] |
||
1414 | mov [access], eax |
||
1415 | mov edx, E_ACCESS |
||
1416 | ja .fail |
||
1417 | |||
1418 | mov ebx, [CURRENT_TASK] |
||
1419 | shl ebx, 5 |
||
1420 | mov ebx, [CURRENT_TASK+ebx+4] |
||
2384 | hidnplayr | 1421 | mov eax, sizeof.SMAP |
2288 | clevermous | 1422 | |
1423 | call create_kernel_object |
||
1424 | test eax, eax |
||
1425 | mov edi, eax |
||
1426 | mov edx, E_NOMEM |
||
1427 | jz .fail |
||
1428 | |||
1429 | inc [esi+SMEM.refcount] |
||
1430 | |||
1431 | mov [edi+SMAP.magic], 'SMAP' |
||
1432 | mov [edi+SMAP.destroy], destroy_smap |
||
1433 | mov [edi+SMAP.parent], esi |
||
1434 | mov [edi+SMAP.base], 0 |
||
1435 | |||
1436 | stdcall user_alloc, [esi+SMEM.size] |
||
1437 | test eax, eax |
||
1438 | mov [mapped], eax |
||
1439 | mov edx, E_NOMEM |
||
1440 | jz .cleanup2 |
||
1441 | |||
1442 | mov [edi+SMAP.base], eax |
||
1443 | |||
1444 | mov ecx, [esi+SMEM.size] |
||
1445 | mov [size], ecx |
||
1446 | |||
1447 | shr ecx, 12 |
||
1448 | shr eax, 10 |
||
1449 | |||
1450 | mov esi, [esi+SMEM.base] |
||
1451 | shr esi, 10 |
||
1452 | lea edi, [page_tabs+eax] |
||
1453 | add esi, page_tabs |
||
1454 | |||
1455 | mov edx, [access] |
||
1456 | or edx, [owner_access] |
||
1457 | shl edx, 1 |
||
1458 | or edx, PG_USER+PG_SHARED |
||
1459 | @@: |
||
1460 | lodsd |
||
1461 | and eax, 0xFFFFF000 |
||
1462 | or eax, edx |
||
1463 | stosd |
||
1464 | loop @B |
||
1465 | |||
1466 | xor edx, edx |
||
1467 | |||
1468 | cmp [owner_access], 0 |
||
1469 | jne .fail |
||
1470 | .exit: |
||
1471 | mov edx, [size] |
||
1472 | .fail: |
||
1473 | mov eax, [mapped] |
||
1474 | |||
1475 | popfd |
||
1476 | pop edi |
||
1477 | pop esi |
||
1478 | pop ebx |
||
1479 | ret |
||
1480 | .cleanup: |
||
1481 | mov [size], edx |
||
1482 | mov eax, esi |
||
1483 | call free |
||
1484 | jmp .exit |
||
1485 | |||
1486 | .cleanup2: |
||
1487 | mov [size], edx |
||
1488 | mov eax, edi |
||
1489 | call destroy_smap |
||
1490 | jmp .exit |
||
1491 | endp |
||
1492 | |||
1493 | align 4 |
||
1494 | proc shmem_close stdcall, name:dword |
||
1495 | |||
1496 | mov eax, [name] |
||
1497 | test eax, eax |
||
1498 | jz .fail |
||
1499 | |||
1500 | push esi |
||
1501 | push edi |
||
1502 | pushfd |
||
1503 | cli |
||
1504 | |||
1505 | mov esi, [current_slot] |
||
1506 | add esi, APP_OBJ_OFFSET |
||
1507 | .next: |
||
1508 | mov eax, [esi+APPOBJ.fd] |
||
1509 | test eax, eax |
||
1510 | jz @F |
||
1511 | |||
1512 | cmp eax, esi |
||
1513 | mov esi, eax |
||
1514 | je @F |
||
1515 | |||
1516 | cmp [eax+SMAP.magic], 'SMAP' |
||
1517 | jne .next |
||
1518 | |||
1519 | mov edi, [eax+SMAP.parent] |
||
1520 | test edi, edi |
||
1521 | jz .next |
||
1522 | |||
1523 | lea edi, [edi+SMEM.name] |
||
1524 | stdcall strncmp, [name], edi, 32 |
||
1525 | test eax, eax |
||
1526 | jne .next |
||
1527 | |||
1528 | stdcall user_free, [esi+SMAP.base] |
||
1529 | |||
1530 | mov eax, esi |
||
1531 | call [esi+APPOBJ.destroy] |
||
1532 | @@: |
||
1533 | popfd |
||
1534 | pop edi |
||
1535 | pop esi |
||
1536 | .fail: |
||
1537 | ret |
||
1538 | endp=> |