Rev 9715 | Details | Compare with Previous | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
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2288 | clevermous | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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10051 | ace_dent | 3 | ;; Copyright (C) KolibriOS team 2004-2024. 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 | |||
9 | ; Small heap based on malloc/free/realloc written by Doug Lea |
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10 | ; Version 2.8.3 Thu Sep 22 11:16:15 2005 Doug Lea (dl at gee) |
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11 | ; Source ftp://gee.cs.oswego.edu/pub/misc/malloc.c |
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12 | ; License http://creativecommons.org/licenses/publicdomain. |
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13 | |||
14 | |||
15 | ; eax= size |
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16 | |||
17 | ; temp |
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18 | ; esi= nb |
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19 | ; ebx= idx |
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20 | ; |
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21 | align 4 |
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22 | malloc: |
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3681 | clevermous | 23 | push ebx esi |
2288 | clevermous | 24 | |
25 | ; nb = ((size+7)&~7)+8; |
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26 | |||
27 | mov esi, eax ;size |
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28 | add esi, 7 |
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29 | and esi, -8 |
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30 | add esi, 8 |
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31 | |||
32 | mov ecx, mst.mutex |
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33 | call mutex_lock |
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34 | |||
35 | cmp esi, 256 |
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36 | jae .large |
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37 | |||
38 | mov ecx, esi |
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39 | shr ecx, 3 |
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40 | or eax, -1 |
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41 | shl eax, cl |
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42 | and eax, [mst.smallmap] |
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43 | jz .small |
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44 | |||
45 | push ebp |
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46 | push edi |
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47 | |||
48 | bsf eax, eax |
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49 | mov ebx, eax |
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50 | |||
51 | ; psize= idx<<3; |
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52 | ; B = &ms.smallbins[idx]; |
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53 | ; p = B->fd; |
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54 | ; F = p->fd; |
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55 | ; rsize= psize-nb; |
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56 | |||
57 | lea ebp, [eax*8] ;ebp= psize |
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58 | shl eax, 4 |
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59 | lea edi, [mst.smallbins+eax] ;edi= B |
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60 | mov edx, [edi+8] ;edx= p |
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61 | mov eax, [edx+8] ;eax= F |
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62 | mov ecx, ebp |
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63 | sub ecx, esi ;ecx= rsize |
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64 | |||
65 | ; if (B == F) |
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66 | cmp edi, eax |
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67 | jne @F |
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68 | |||
69 | btr [mst.smallmap], ebx |
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70 | @@: |
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71 | |||
72 | ; B->fd = F; |
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73 | ; F->bk = B; |
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74 | ; if(rsize<16) |
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75 | |||
76 | cmp ecx, 16 |
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77 | mov [edi+8], eax |
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78 | mov [eax+12], edi |
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79 | jae .split |
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80 | |||
81 | ; p->head = psize|PINUSE_BIT|CINUSE_BIT; |
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82 | ; (p + psize)->head |= PINUSE_BIT; |
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83 | |||
84 | lea eax, [edx+8] |
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85 | or dword [edx+ebp+4], 1 |
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86 | |||
87 | or ebp, 3 |
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88 | mov [edx+4], ebp |
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89 | |||
90 | pop edi |
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91 | pop ebp |
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92 | .done: |
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93 | mov esi, eax |
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94 | mov ecx, mst.mutex |
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95 | call mutex_unlock |
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96 | mov eax, esi |
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3681 | clevermous | 97 | pop esi ebx |
2288 | clevermous | 98 | ret |
99 | |||
100 | .split: |
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101 | lea ebx, [edx+8] ;ebx=mem |
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102 | |||
103 | ; r = chunk_plus_offset(p, nb); |
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104 | ; p->head = nb|PINUSE_BIT|CINUSE_BIT; |
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105 | ; r->head = rsize|PINUSE_BIT; |
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106 | |||
107 | lea eax, [edx+esi] ;eax= r |
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108 | or esi, 3 |
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109 | mov [edx+4], esi |
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110 | |||
111 | mov edx, ecx |
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112 | or edx, 1 |
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113 | mov [eax+4], edx |
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114 | |||
115 | ; (r + rsize)->prev_foot = rsize; |
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116 | |||
117 | mov [eax+ecx], ecx |
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118 | |||
119 | ; I = rsize>>3; |
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120 | |||
121 | shr ecx, 3 |
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122 | |||
123 | ; ms.smallmap |= 1<< I; |
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124 | bts [mst.smallmap], ecx |
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125 | |||
126 | ; B = &ms.smallbins[I]; |
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127 | |||
128 | shl ecx, 4 |
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129 | pop edi |
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130 | pop ebp |
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131 | add ecx, mst.smallbins ;ecx= B |
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132 | |||
133 | mov edx, [ecx+8] ; F = B->fd; |
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134 | mov [ecx+8], eax ; B->fd = r; |
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135 | mov [edx+12], eax ; F->bk = r; |
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136 | mov [eax+8], edx ; r->fd = F; |
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137 | mov [eax+12], ecx ; r->bk = B; |
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138 | |||
139 | mov eax, ebx |
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140 | jmp .done |
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141 | |||
142 | .small: |
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143 | |||
144 | ; if (ms.treemap != 0 && (mem = malloc_small(nb)) != 0) |
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145 | ;;;;;;;;;;; start a change |
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146 | mov eax, [mst.treemap] |
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147 | test eax, eax |
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148 | ;;;;;;;;;;; end the change |
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149 | ; cmp [mst.treemap], 0 |
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150 | jz .from_top |
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151 | mov eax, esi |
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152 | call malloc_small |
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153 | test eax, eax |
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154 | jz .from_top |
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155 | jmp .done |
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156 | |||
157 | .large: |
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158 | |||
159 | ; if (ms.treemap != 0 && (mem = malloc_large(nb)) != 0) |
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160 | |||
161 | cmp [mst.treemap], 0 |
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162 | je .from_top |
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163 | |||
164 | call malloc_large ;esi= nb |
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165 | test eax, eax |
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166 | jne .done |
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167 | .from_top: |
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168 | |||
169 | ; if (nb < ms.topsize) |
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170 | |||
171 | mov eax, [mst.topsize] |
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172 | cmp esi, eax |
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173 | jae .fail |
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174 | |||
175 | ; rsize = ms.topsize -= nb; |
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176 | ; p = ms.top; |
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177 | |||
178 | mov ecx, [mst.top] |
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179 | sub eax, esi |
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180 | mov [mst.topsize], eax |
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181 | |||
182 | ; r = ms.top = chunk_plus_offset(p, nb); |
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183 | ; r->head = rsize | PINUSE_BIT; |
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184 | ; p->head = nb |PINUSE_BIT|CINUSE_BIT; |
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185 | |||
186 | lea edx, [ecx+esi] |
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187 | or eax, 1 |
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188 | mov [mst.top], edx |
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189 | or esi, 3 |
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190 | mov [edx+4], eax |
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191 | mov [ecx+4], esi |
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192 | lea eax, [ecx+8] |
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193 | jmp .done |
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194 | |||
195 | .fail: |
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196 | xor eax, eax |
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197 | jmp .done |
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198 | |||
199 | ; param |
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200 | ; eax= mem |
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201 | align 4 |
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202 | free: |
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203 | test eax, eax |
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204 | jz .exit |
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205 | |||
3681 | clevermous | 206 | push ebx edi |
2288 | clevermous | 207 | mov edi, eax |
208 | add edi, -8 |
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209 | |||
210 | ; if(p->head & CINUSE_BIT) |
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211 | |||
212 | test byte [edi+4], 2 |
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213 | je .fail |
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214 | |||
215 | mov ecx, mst.mutex |
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216 | call mutex_lock |
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217 | |||
218 | ; psize = p->head & (~3); |
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219 | |||
220 | mov eax, [edi+4] |
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221 | push esi |
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222 | mov esi, eax |
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223 | and esi, -4 |
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224 | |||
225 | ; next = chunk_plus_offset(p, psize); |
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226 | ; if(!(p->head & PINUSE_BIT)) |
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227 | |||
228 | test al, 1 |
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229 | lea ebx, [esi+edi] |
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230 | jne .next |
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231 | |||
232 | ; prevsize = p->prev_foot; |
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233 | ; prev=p - prevsize; |
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234 | ; psize += prevsize; |
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235 | ; p = prev; |
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236 | |||
237 | mov ecx, [edi] ;ecx= prevsize |
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238 | add esi, ecx ;esi= psize |
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239 | sub edi, ecx ;edi= p |
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240 | |||
241 | ; if (prevsize < 256) |
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242 | |||
243 | cmp ecx, 256 |
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244 | jae .unlink_large |
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245 | |||
246 | mov eax, [edi+8] ;F = p->fd; |
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247 | mov edx, [edi+12] ;B = p->bk; |
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248 | |||
249 | ; if (F == B) |
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250 | ; ms.smallmap &= ~(1<< I); |
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251 | shr ecx, 3 |
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252 | cmp eax, edx |
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253 | jne @F |
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254 | btr [mst.smallmap], ecx |
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255 | @@: |
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256 | mov [eax+12], edx ;F->bk = B; |
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257 | mov [edx+8], eax ;B->fd = F |
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258 | jmp .next |
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259 | .unlink_large: |
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260 | mov edx, edi |
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261 | call unlink_large_chunk |
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262 | .next: |
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263 | |||
264 | ; if(next->head & PINUSE_BIT) |
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265 | |||
266 | mov eax, [ebx+4] |
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267 | test al, 1 |
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268 | jz .fail2 |
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269 | |||
270 | ; if (! (next->head & CINUSE_BIT)) |
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271 | |||
272 | test al, 2 |
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273 | jnz .fix_next |
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274 | |||
275 | ; if (next == ms.top) |
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276 | |||
277 | cmp ebx, [mst.top] |
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278 | jne @F |
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279 | |||
280 | ; tsize = ms.topsize += psize; |
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281 | |||
282 | mov eax, [mst.topsize] |
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283 | add eax, esi |
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284 | mov [mst.topsize], eax |
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285 | |||
286 | ; ms.top = p; |
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287 | ; p->head = tsize | PINUSE_BIT; |
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288 | |||
289 | or eax, 1 |
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290 | mov [mst.top], edi |
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291 | mov [edi+4], eax |
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292 | .fail2: |
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293 | mov esi, eax |
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294 | mov ecx, mst.mutex |
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295 | call mutex_unlock |
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296 | mov eax, esi |
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297 | pop esi |
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298 | .fail: |
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3681 | clevermous | 299 | pop edi ebx |
2288 | clevermous | 300 | .exit: |
301 | ret |
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302 | |||
303 | @@: |
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304 | |||
305 | ; nsize = next->head & ~INUSE_BITS; |
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306 | |||
307 | and eax, -4 |
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308 | add esi, eax ;psize += nsize; |
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309 | |||
310 | ; if (nsize < 256) |
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311 | |||
312 | cmp eax, 256 |
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313 | jae .unl_large |
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314 | |||
315 | mov edx, [ebx+8] ;F = next->fd |
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316 | mov ebx, [ebx+12] ;B = next->bk |
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317 | |||
318 | ; if (F == B) |
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319 | |||
320 | cmp edx, ebx |
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321 | jne @F |
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322 | mov ecx, eax |
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323 | shr ecx, 3 |
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324 | btr [mst.smallmap], ecx |
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325 | @@: |
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326 | mov [edx+12], ebx ;F->bk = B |
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327 | |||
328 | ; p->head = psize|PINUSE_BIT; |
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329 | |||
330 | mov ecx, esi |
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331 | mov [ebx+8], edx |
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332 | or ecx, 1 |
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333 | mov [edi+4], ecx |
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334 | |||
335 | ; (p+psize)->prev_foot = psize; |
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336 | |||
337 | mov [esi+edi], esi |
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338 | |||
339 | ; insert_chunk(p,psize); |
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340 | |||
341 | mov eax, esi |
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342 | mov ecx, edi |
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3126 | clevermous | 343 | call insert_chunk |
344 | jmp .fail2 |
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2288 | clevermous | 345 | .unl_large: |
346 | |||
347 | ; unlink_large_chunk((tchunkptr)next); |
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348 | |||
349 | mov edx, ebx |
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350 | call unlink_large_chunk |
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351 | ; p->head = psize|PINUSE_BIT; |
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352 | |||
353 | mov ecx, esi |
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354 | or ecx, 1 |
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355 | mov [edi+4], ecx |
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356 | |||
357 | ; (p+psize)->prev_foot = psize; |
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358 | |||
359 | mov [esi+edi], esi |
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360 | |||
361 | ; insert_chunk(p,psize); |
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362 | |||
363 | mov eax, esi |
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364 | mov ecx, edi |
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3126 | clevermous | 365 | call insert_chunk |
366 | jmp .fail2 |
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2288 | clevermous | 367 | .fix_next: |
368 | |||
369 | ; (p+psize)->prev_foot = psize; |
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370 | ; next->head &= ~PINUSE_BIT; |
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371 | ; p->head = psize|PINUSE_BIT; |
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372 | |||
373 | and eax, -2 |
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374 | mov edx, esi |
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375 | mov [ebx+4], eax |
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376 | or edx, 1 |
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377 | mov [edi+4], edx |
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378 | |||
379 | ; (p+psize)->prev_foot = psize; |
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380 | |||
381 | mov [esi+edi], esi |
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382 | ; insert_chunk(p,psize); |
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383 | |||
384 | mov eax, esi |
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385 | mov ecx, edi |
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3126 | clevermous | 386 | call insert_chunk |
387 | jmp .fail2 |
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2288 | clevermous | 388 | |
389 | ; param |
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390 | ; ecx = chunk |
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391 | ; eax = size |
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392 | |||
393 | insert_chunk: |
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394 | |||
395 | cmp eax, 256 |
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396 | push esi |
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397 | mov esi, ecx |
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398 | jae .large |
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399 | |||
400 | ; I = S>>3; |
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401 | ; ms.smallmap |= 1<< I; |
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402 | |||
403 | shr eax, 3 |
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404 | bts [mst.smallmap], eax |
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405 | |||
406 | ; B = &ms.smallbins[I]; |
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407 | |||
408 | shl eax, 4 |
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409 | add eax, mst.smallbins |
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410 | mov edx, [eax+8] ;F = B->fd |
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411 | mov [eax+8], esi ;B->fd = P |
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412 | mov [edx+12], esi ;F->bk = P |
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413 | mov [esi+8], edx ;P->fd = F |
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414 | mov [esi+12], eax ;P->bk = B |
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415 | pop esi |
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416 | ret |
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417 | .large: |
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418 | mov ebx, eax |
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419 | call insert_large_chunk |
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420 | pop esi |
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421 | ret |
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422 | |||
423 | |||
424 | ; param |
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425 | ; esi= chunk |
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426 | ; ebx= size |
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427 | |||
428 | insert_large_chunk: |
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429 | |||
430 | ; I = compute_tree_index(S); |
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431 | |||
432 | mov edx, ebx |
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433 | shr edx, 8 |
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434 | bsr eax, edx |
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435 | lea ecx, [eax+7] |
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436 | mov edx, ebx |
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437 | shr edx, cl |
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438 | and edx, 1 |
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439 | lea ecx, [edx+eax*2] |
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440 | |||
441 | ; X->index = I; |
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442 | mov dword [esi+28], ecx |
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443 | |||
444 | ; X->child[0] = X->child[1] = 0; |
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445 | and dword [esi+20], 0 |
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446 | and dword [esi+16], 0 |
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447 | |||
448 | ; H = &ms.treebins[I]; |
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449 | |||
450 | mov eax, ecx |
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451 | lea edx, [mst.treebins+eax*4] |
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452 | |||
453 | ; if (!(ms.treemap & 1< |
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454 | bt [mst.treemap], ecx |
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455 | jc .tree |
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456 | |||
457 | ; ms.treemap |= 1< |
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458 | bts [mst.treemap], ecx |
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459 | ; *H = X; |
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460 | mov dword [edx], esi |
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461 | jmp .done |
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462 | .tree: |
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463 | |||
464 | ; T = *H; |
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465 | mov edx, [edx] |
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466 | |||
467 | ; K = S << leftshift_for_tree_index(I); |
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468 | mov eax, ecx |
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469 | shr eax, 1 |
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470 | sub ecx, 31 |
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471 | mov edi, 37 |
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472 | sub edi, eax |
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473 | neg ecx |
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474 | sbb ecx, ecx |
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475 | and ecx, edi |
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476 | mov eax, ebx |
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477 | shl eax, cl ;eax= K |
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478 | |||
479 | jmp .loop |
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480 | .not_eq_size: |
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481 | |||
482 | ; C = &(T->child[(K >> 31) & 1]); |
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483 | mov ecx, eax |
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484 | shr ecx, 31 |
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485 | lea ecx, [edx+ecx*4+16] |
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486 | |||
487 | ; K <<= 1; |
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488 | ; if (*C != 0) |
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489 | mov edi, [ecx] |
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490 | add eax, eax |
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491 | test edi, edi |
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492 | jz .insert_child |
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493 | |||
494 | ; T = *C; |
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495 | mov edx, edi |
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496 | .loop: |
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497 | |||
498 | ; for (;;) |
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499 | ; if ((T->head & ~INUSE_BITS) != S) |
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500 | |||
501 | mov ecx, [edx+4] |
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502 | and ecx, not 3 |
||
503 | cmp ecx, ebx |
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504 | jne .not_eq_size |
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505 | |||
506 | ; F = T->fd; |
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507 | mov eax, [edx+8] |
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508 | |||
509 | ; T->fd = F->bk = X; |
||
510 | mov [eax+12], esi |
||
511 | mov [edx+8], esi |
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512 | |||
513 | ; X->fd = F; |
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514 | ; X->bk = T; |
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515 | ; X->parent = 0; |
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516 | |||
517 | and dword [esi+24], 0 |
||
518 | mov [esi+8], eax |
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519 | mov [esi+12], edx |
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520 | ret |
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521 | .insert_child: |
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522 | |||
523 | ; *C = X; |
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524 | mov [ecx], esi |
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525 | .done: |
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526 | |||
527 | ; X->parent = T; |
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528 | mov [esi+24], edx |
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529 | |||
530 | ; X->fd = X->bk = X; |
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531 | mov [esi+12], esi |
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532 | mov [esi+8], esi |
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533 | ret |
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534 | |||
535 | |||
536 | ; param |
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537 | ; edx= chunk |
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538 | |||
539 | unlink_large_chunk: |
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540 | |||
541 | mov eax, [edx+12] |
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542 | cmp eax, edx |
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543 | push edi |
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544 | mov edi, [edx+24] |
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545 | je @F |
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546 | |||
547 | mov ecx, [edx+8] ;F = X->fd |
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548 | mov [ecx+12], eax ;F->bk = R; |
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549 | mov [eax+8], ecx ;R->fd = F |
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550 | jmp .parent |
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551 | @@: |
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552 | mov eax, [edx+20] |
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553 | test eax, eax |
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554 | push esi |
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555 | lea esi, [edx+20] |
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556 | jne .loop |
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557 | |||
558 | mov eax, [edx+16] |
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559 | test eax, eax |
||
560 | lea esi, [edx+16] |
||
561 | je .l2 |
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562 | .loop: |
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563 | cmp dword [eax+20], 0 |
||
564 | lea ecx, [eax+20] |
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565 | jne @F |
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566 | |||
567 | cmp dword [eax+16], 0 |
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568 | lea ecx, [eax+16] |
||
569 | je .l1 |
||
570 | @@: |
||
571 | mov eax, [ecx] |
||
572 | mov esi, ecx |
||
573 | jmp .loop |
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574 | .l1: |
||
575 | mov dword [esi], 0 |
||
576 | .l2: |
||
577 | pop esi |
||
578 | .parent: |
||
579 | test edi, edi |
||
580 | je .done |
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581 | |||
582 | mov ecx, [edx+28] |
||
9715 | Doczom | 583 | cmp edx, [mst.treebins + ecx*4] |
584 | lea ecx, [mst.treebins + ecx*4] |
||
2288 | clevermous | 585 | jne .l3 |
586 | |||
587 | test eax, eax |
||
588 | mov [ecx], eax |
||
589 | jne .l5 |
||
590 | |||
591 | mov ecx, [edx+28] |
||
592 | btr [mst.treemap], ecx |
||
593 | pop edi |
||
594 | ret |
||
595 | |||
596 | .l3: |
||
597 | cmp [edi+16], edx |
||
598 | jne @F |
||
599 | |||
600 | mov [edi+16], eax |
||
601 | jmp .l4 |
||
602 | |||
603 | @@: |
||
604 | mov [edi+20], eax |
||
605 | |||
606 | .l4: |
||
607 | test eax, eax |
||
608 | je .done |
||
609 | |||
610 | .l5: |
||
611 | mov [eax+24], edi |
||
612 | mov ecx, [edx+16] |
||
613 | test ecx, ecx |
||
614 | je .l6 |
||
615 | |||
616 | mov [eax+16], ecx |
||
617 | mov [ecx+24], eax |
||
618 | |||
619 | .l6: |
||
620 | mov edx, [edx+20] |
||
621 | test edx, edx |
||
622 | je .done |
||
623 | |||
624 | mov [eax+20], edx |
||
625 | mov [edx+24], eax |
||
626 | |||
627 | .done: |
||
628 | pop edi |
||
629 | ret |
||
630 | |||
631 | ; param |
||
632 | ; esi= nb |
||
633 | |||
634 | malloc_small: |
||
635 | push ebp |
||
636 | mov ebp, esi |
||
637 | |||
638 | push edi |
||
639 | |||
640 | bsf eax, [mst.treemap] |
||
9715 | Doczom | 641 | mov ecx, [mst.treebins + eax*4] |
2288 | clevermous | 642 | |
643 | ; rsize = (t->head & ~INUSE_BITS) - nb; |
||
644 | |||
645 | mov edi, [ecx+4] |
||
646 | and edi, -4 |
||
647 | sub edi, esi |
||
648 | |||
649 | .loop: |
||
650 | mov ebx, ecx |
||
651 | |||
652 | .loop_1: |
||
653 | |||
654 | ; while ((t = leftmost_child(t)) != 0) |
||
655 | |||
656 | mov eax, [ecx+16] |
||
657 | test eax, eax |
||
658 | jz @F |
||
659 | mov ecx, eax |
||
660 | jmp .l1 |
||
661 | |||
662 | @@: |
||
663 | mov ecx, [ecx+20] |
||
664 | |||
665 | .l1: |
||
666 | test ecx, ecx |
||
667 | jz .unlink |
||
668 | |||
669 | ; trem = (t->head & ~INUSE_BITS) - nb; |
||
670 | |||
671 | mov eax, [ecx+4] |
||
672 | and eax, -4 |
||
673 | sub eax, ebp |
||
674 | |||
675 | ; if (trem < rsize) |
||
676 | |||
677 | cmp eax, edi |
||
678 | jae .loop_1 |
||
679 | |||
680 | ; rsize = trem; |
||
681 | |||
682 | mov edi, eax |
||
683 | jmp .loop |
||
684 | .unlink: |
||
685 | |||
686 | |||
687 | ; r = chunk_plus_offset((mchunkptr)v, nb); |
||
688 | ; unlink_large_chunk(v); |
||
689 | |||
690 | mov edx, ebx |
||
9715 | Doczom | 691 | lea esi, [ebx + ebp] |
2288 | clevermous | 692 | call unlink_large_chunk |
693 | |||
694 | ; if (rsize < 16) |
||
695 | |||
696 | cmp edi, 16 |
||
697 | jae .split |
||
698 | |||
699 | ; v->head = (rsize + nb)|PINUSE_BIT|CINUSE_BIT; |
||
700 | |||
9715 | Doczom | 701 | lea ecx, [edi + ebp] |
2288 | clevermous | 702 | |
703 | ; (v+rsize + nb)->head |= PINUSE_BIT; |
||
704 | |||
705 | add edi, ebx |
||
9715 | Doczom | 706 | lea eax, [edi + ebp + 4] |
2288 | clevermous | 707 | pop edi |
708 | or ecx, 3 |
||
9715 | Doczom | 709 | mov [ebx + 4], ecx |
2288 | clevermous | 710 | or dword [eax], 1 |
711 | pop ebp |
||
712 | |||
9715 | Doczom | 713 | lea eax, [ebx + 8] |
2288 | clevermous | 714 | ret |
715 | |||
716 | .split: |
||
717 | |||
718 | ; v->head = nb|PINUSE_BIT|CINUSE_BIT; |
||
719 | ; r->head = rsize|PINUSE_BIT; |
||
720 | ; (r+rsize)->prev_foot = rsize; |
||
721 | |||
722 | or ebp, 3 |
||
723 | mov edx, edi |
||
724 | or edx, 1 |
||
725 | |||
726 | cmp edi, 256 |
||
727 | mov [ebx+4], ebp |
||
728 | mov [esi+4], edx |
||
729 | mov [esi+edi], edi |
||
730 | jae .large |
||
731 | |||
732 | shr edi, 3 |
||
733 | bts [mst.smallmap], edi |
||
734 | |||
735 | mov eax, edi |
||
736 | shl eax, 4 |
||
737 | add eax, mst.smallbins |
||
738 | |||
739 | mov edx, [eax+8] |
||
740 | mov [eax+8], esi |
||
741 | mov [edx+12], esi |
||
742 | pop edi |
||
743 | mov [esi+12], eax |
||
744 | mov [esi+8], edx |
||
745 | pop ebp |
||
746 | lea eax, [ebx+8] |
||
747 | ret |
||
748 | |||
749 | .large: |
||
750 | lea eax, [ebx+8] |
||
751 | push eax |
||
752 | mov ebx, edi |
||
753 | call insert_large_chunk |
||
754 | pop eax |
||
755 | pop edi |
||
756 | pop ebp |
||
757 | ret |
||
758 | |||
759 | |||
760 | ; param |
||
761 | ; esi= nb |
||
762 | |||
763 | malloc_large: |
||
764 | .idx equ esp+4 |
||
765 | .rst equ esp |
||
766 | |||
767 | push ebp |
||
768 | push esi |
||
769 | push edi |
||
770 | sub esp, 8 |
||
771 | ; v = 0; |
||
772 | ; rsize = -nb; |
||
773 | |||
774 | mov edi, esi |
||
775 | mov ebx, esi |
||
776 | xor ebp, ebp |
||
777 | neg edi |
||
778 | |||
779 | ; idx = compute_tree_index(nb); |
||
780 | |||
781 | mov edx, esi |
||
782 | shr edx, 8 |
||
783 | bsr eax, edx |
||
784 | lea ecx, [eax+7] |
||
785 | shr esi, cl |
||
786 | and esi, 1 |
||
9715 | Doczom | 787 | lea ecx, [esi + eax*2] |
2288 | clevermous | 788 | mov [.idx], ecx |
789 | |||
790 | ; if ((t = ms.treebins[idx]) != 0) |
||
791 | |||
9715 | Doczom | 792 | mov eax, [mst.treebins + ecx*4] |
2288 | clevermous | 793 | test eax, eax |
794 | jz .l3 |
||
795 | |||
796 | ; sizebits = nb << leftshift_for_tree_index(idx); |
||
797 | |||
798 | cmp ecx, 31 |
||
799 | jne @F |
||
800 | xor ecx, ecx |
||
801 | jmp .l1 |
||
802 | |||
803 | @@: |
||
804 | mov edx, ecx |
||
805 | shr edx, 1 |
||
806 | mov ecx, 37 |
||
807 | sub ecx, edx |
||
808 | |||
809 | .l1: |
||
810 | mov edx, ebx |
||
811 | shl edx, cl |
||
812 | |||
813 | ; rst = 0; |
||
814 | mov [.rst], ebp |
||
815 | |||
816 | .loop: |
||
817 | |||
818 | ; trem = (t->head & ~INUSE_BITS) - nb; |
||
819 | |||
820 | mov ecx, [eax+4] |
||
821 | and ecx, -4 |
||
822 | sub ecx, ebx |
||
823 | |||
824 | ; if (trem < rsize) |
||
825 | |||
826 | cmp ecx, edi |
||
827 | jae @F |
||
828 | ; v = t; |
||
829 | ; if ((rsize = trem) == 0) |
||
830 | |||
831 | test ecx, ecx |
||
832 | mov ebp, eax |
||
833 | mov edi, ecx |
||
834 | je .l2 |
||
835 | |||
836 | @@: |
||
837 | |||
838 | ; rt = t->child[1]; |
||
839 | |||
840 | mov ecx, [eax+20] |
||
841 | |||
842 | ; t = t->child[(sizebits >> 31) & 1]; |
||
843 | |||
844 | mov esi, edx |
||
845 | shr esi, 31 |
||
846 | |||
847 | ; if (rt != 0 && rt != t) |
||
848 | |||
849 | test ecx, ecx |
||
9715 | Doczom | 850 | mov eax, [eax + esi*4+16] |
2288 | clevermous | 851 | jz @F |
852 | cmp ecx, eax |
||
853 | jz @F |
||
854 | |||
855 | ; rst = rt; |
||
856 | mov [.rst], ecx |
||
857 | |||
858 | @@: |
||
859 | ; if (t == 0) |
||
860 | |||
861 | test eax, eax |
||
862 | jz @F |
||
863 | |||
864 | ; sizebits <<= 1; |
||
865 | |||
866 | add edx, edx |
||
867 | jmp .loop |
||
868 | |||
869 | @@: |
||
870 | ; t = rst; |
||
871 | mov eax, [.rst] |
||
872 | |||
873 | .l2: |
||
874 | ; if (t == 0 && v == 0) |
||
875 | |||
876 | test eax, eax |
||
877 | jne .l4 |
||
878 | test ebp, ebp |
||
879 | jne .l7 |
||
880 | mov ecx, [.idx] |
||
881 | |||
882 | .l3: |
||
883 | |||
884 | ; leftbits = (-1< |
||
885 | ; if (leftbits != 0) |
||
886 | |||
887 | or edx, -1 |
||
888 | shl edx, cl |
||
889 | and edx, [mst.treemap] |
||
890 | jz @F |
||
891 | |||
892 | bsf eax, edx |
||
893 | ; t = ms.treebins[i]; |
||
9715 | Doczom | 894 | mov eax, [mst.treebins + eax*4] |
2288 | clevermous | 895 | |
896 | @@: |
||
897 | |||
898 | ; while (t != 0) |
||
899 | test eax, eax |
||
900 | jz .l5 |
||
901 | |||
902 | .l4: |
||
903 | |||
904 | ; trem = (t->head & ~INUSE_BITS) - nb; |
||
905 | |||
906 | mov ecx, [eax+4] |
||
907 | and ecx, -4 |
||
908 | sub ecx, ebx |
||
909 | |||
910 | ; if (trem < rsize) |
||
911 | |||
912 | cmp ecx, edi |
||
913 | jae @F |
||
914 | ; rsize = trem; |
||
915 | |||
916 | mov edi, ecx |
||
917 | ; v = t; |
||
918 | mov ebp, eax |
||
919 | |||
920 | @@: |
||
921 | |||
922 | ; t = leftmost_child(t); |
||
923 | |||
924 | mov ecx, [eax+16] |
||
925 | test ecx, ecx |
||
926 | je @F |
||
927 | mov eax, ecx |
||
928 | jmp .l6 |
||
929 | |||
930 | @@: |
||
931 | mov eax, [eax+20] |
||
932 | |||
933 | .l6: |
||
934 | |||
935 | ; while (t != 0) |
||
936 | |||
937 | test eax, eax |
||
938 | jne .l4 |
||
939 | |||
940 | .l5: |
||
941 | |||
942 | ; if (v != 0) |
||
943 | |||
944 | test ebp, ebp |
||
945 | jz .done |
||
946 | |||
947 | .l7: |
||
948 | |||
949 | ; r = chunk_plus_offset((mchunkptr)v, nb); |
||
950 | ; unlink_large_chunk(v); |
||
951 | |||
952 | mov edx, ebp |
||
9715 | Doczom | 953 | lea esi, [ebx + ebp] |
2288 | clevermous | 954 | call unlink_large_chunk |
955 | |||
956 | ; if (rsize < 16) |
||
957 | |||
958 | cmp edi, 16 |
||
959 | jae .large |
||
960 | |||
961 | ; v->head = (rsize + nb)|PINUSE_BIT|CINUSE_BIT; |
||
962 | |||
9715 | Doczom | 963 | lea ecx, [edi + ebx] |
2288 | clevermous | 964 | |
965 | ; (v+rsize + nb)->head |= PINUSE_BIT; |
||
966 | |||
967 | add edi, ebp |
||
9715 | Doczom | 968 | lea eax, [edi + ebx + 4] |
2288 | clevermous | 969 | or ecx, 3 |
970 | mov [ebp+4], ecx |
||
971 | or dword [eax], 1 |
||
972 | lea eax, [ebp+8] |
||
973 | add esp, 8 |
||
974 | pop edi |
||
975 | pop esi |
||
976 | pop ebp |
||
977 | ret |
||
978 | |||
979 | .large: |
||
980 | |||
981 | ; v->head = nb|PINUSE_BIT|CINUSE_BIT; |
||
982 | ; r->head = rsize|PINUSE_BIT; |
||
983 | |||
984 | mov edx, edi |
||
985 | or ebx, 3 |
||
986 | mov [ebp+4], ebx |
||
987 | or edx, 1 |
||
988 | mov [esi+4], edx |
||
989 | |||
990 | ; (r+rsize)->prev_foot = rsize; |
||
991 | ; insert_large_chunk((tchunkptr)r, rsize); |
||
992 | |||
993 | mov [esi+edi], edi |
||
994 | mov eax, edi |
||
995 | mov ecx, esi |
||
996 | call insert_chunk |
||
997 | |||
998 | lea eax, [ebp+8] |
||
999 | add esp, 8 |
||
1000 | pop edi |
||
1001 | pop esi |
||
1002 | pop ebp |
||
1003 | ret |
||
1004 | |||
1005 | .done: |
||
1006 | add esp, 8 |
||
1007 | pop edi |
||
1008 | pop esi |
||
1009 | pop ebp |
||
1010 | xor eax, eax |
||
1011 | ret |
||
1012 | |||
1013 | init_malloc: |
||
1014 | |||
1015 | stdcall kernel_alloc, 0x40000 |
||
1016 | |||
1017 | mov [mst.top], eax |
||
1018 | mov [mst.topsize], 128*1024 |
||
1019 | mov dword [eax+4], (128*1024) or 1 |
||
1020 | mov eax, mst.smallbins |
||
1021 | |||
1022 | @@: |
||
1023 | mov [eax+8], eax |
||
1024 | mov [eax+12], eax |
||
1025 | add eax, 16 |
||
9715 | Doczom | 1026 | cmp eax, mst.smallbins + 512 |
2288 | clevermous | 1027 | jb @B |
1028 | |||
1029 | mov ecx, mst.mutex |
||
1030 | call mutex_init |
||
1031 | |||
1032 | ret>> |
||
1033 |