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431 | serge | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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3 | ;; Copyright (C) KolibriOS team 2004-2007. All rights reserved. ;; |
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4 | ;; Distributed under terms of the GNU General Public License ;; |
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5 | ;; ;; |
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6 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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7 | |||
593 | mikedld | 8 | $Revision: 1210 $ |
9 | |||
10 | |||
276 | serge | 11 | ; Small heap based on malloc/free/realloc written by Doug Lea |
12 | ; Version 2.8.3 Thu Sep 22 11:16:15 2005 Doug Lea (dl at gee) |
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13 | ; Source ftp://gee.cs.oswego.edu/pub/misc/malloc.c |
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14 | ; License http://creativecommons.org/licenses/publicdomain. |
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15 | |||
16 | |||
17 | ; eax= size |
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18 | |||
19 | ; temp |
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20 | ; esi= nb |
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21 | ; ebx= idx |
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22 | ; |
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1210 | Lrz | 23 | align 4 |
276 | serge | 24 | malloc: |
25 | push esi |
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26 | |||
27 | ; nb = ((size+7)&~7)+8; |
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28 | |||
29 | mov esi, eax ;size |
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30 | add esi, 7 |
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31 | and esi, -8 |
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32 | add esi, 8 |
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33 | |||
34 | mov ebx, mst.mutex |
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35 | call wait_mutex ;ebx |
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36 | |||
37 | cmp esi, 256 |
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38 | jae .large |
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39 | |||
40 | mov ecx, esi |
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326 | serge | 41 | shr ecx, 3 |
276 | serge | 42 | or eax, -1 |
43 | shl eax, cl |
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44 | and eax, [mst.smallmap] |
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45 | jz .small |
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46 | |||
47 | push ebp |
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48 | push edi |
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49 | |||
50 | bsf eax, eax |
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51 | mov ebx, eax |
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52 | |||
53 | ; psize= idx<<3; |
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54 | ; B = &ms.smallbins[idx]; |
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55 | ; p = B->fd; |
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56 | ; F = p->fd; |
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57 | ; rsize= psize-nb; |
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58 | |||
59 | lea ebp, [eax*8] ;ebp= psize |
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60 | shl eax, 4 |
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61 | lea edi, [mst.smallbins+eax] ;edi= B |
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62 | mov edx, [edi+8] ;edx= p |
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63 | mov eax, [edx+8] ;eax= F |
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64 | mov ecx, ebp |
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65 | sub ecx, esi ;ecx= rsize |
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66 | |||
67 | ; if (B == F) |
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68 | cmp edi, eax |
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69 | jne @F |
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70 | |||
71 | btr [mst.smallmap], ebx |
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1210 | Lrz | 72 | align 4 |
276 | serge | 73 | @@: |
74 | |||
75 | ; B->fd = F; |
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76 | ; F->bk = B; |
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77 | ; if(rsize<16) |
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78 | |||
79 | cmp ecx, 16 |
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80 | mov [edi+8], eax |
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81 | mov [eax+12], edi |
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82 | jae .split |
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83 | |||
84 | ; p->head = psize|PINUSE_BIT|CINUSE_BIT; |
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85 | ; (p + psize)->head |= PINUSE_BIT; |
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86 | |||
87 | lea eax, [edx+8] |
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88 | or dword [edx+ebp+4], 1 |
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89 | |||
90 | or ebp, 3 |
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91 | mov [edx+4], ebp |
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92 | |||
93 | pop edi |
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94 | pop ebp |
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1210 | Lrz | 95 | align 4 |
276 | serge | 96 | .done: |
97 | pop esi |
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98 | mov [mst.mutex], 0 |
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99 | ret |
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1210 | Lrz | 100 | align 4 |
276 | serge | 101 | .split: |
102 | lea ebx, [edx+8] ;ebx=mem |
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103 | |||
104 | ; r = chunk_plus_offset(p, nb); |
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105 | ; p->head = nb|PINUSE_BIT|CINUSE_BIT; |
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106 | ; r->head = rsize|PINUSE_BIT; |
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107 | |||
108 | lea eax, [edx+esi] ;eax= r |
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109 | or esi, 3 |
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110 | mov [edx+4], esi |
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111 | |||
112 | mov edx, ecx |
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113 | or edx, 1 |
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114 | mov [eax+4], edx |
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115 | |||
116 | ; (r + rsize)->prev_foot = rsize; |
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117 | |||
118 | mov [eax+ecx], ecx |
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119 | |||
120 | ; I = rsize>>3; |
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121 | |||
122 | shr ecx, 3 |
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123 | |||
124 | ; ms.smallmap |= 1<< I; |
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125 | bts [mst.smallmap], ecx |
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126 | |||
127 | ; B = &ms.smallbins[I]; |
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128 | |||
129 | shl ecx, 4 |
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130 | pop edi |
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131 | pop ebp |
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132 | add ecx, mst.smallbins ;ecx= B |
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133 | |||
134 | mov edx, [ecx+8] ; F = B->fd; |
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135 | mov [ecx+8], eax ; B->fd = r; |
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136 | mov [edx+12], eax ; F->bk = r; |
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137 | mov [eax+8], edx ; r->fd = F; |
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138 | mov [eax+12], ecx ; r->bk = B; |
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139 | mov eax, ebx |
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140 | pop esi |
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141 | ret |
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1210 | Lrz | 142 | align 4 |
276 | serge | 143 | .small: |
144 | |||
145 | ; if (ms.treemap != 0 && (mem = malloc_small(nb)) != 0) |
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1210 | Lrz | 146 | ;;;;;;;;;;; start a change |
147 | mov eax,[mst.treemap] |
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148 | test eax,eax |
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149 | ;;;;;;;;;;; end the change |
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150 | ; cmp [mst.treemap], 0 |
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151 | jz .from_top |
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276 | serge | 152 | mov eax, esi |
153 | call malloc_small |
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154 | test eax, eax |
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155 | jz .from_top |
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156 | pop esi |
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157 | and [mst.mutex], 0 |
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158 | ret |
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1210 | Lrz | 159 | align 4 |
276 | serge | 160 | .large: |
161 | |||
162 | ; if (ms.treemap != 0 && (mem = malloc_large(nb)) != 0) |
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163 | |||
164 | cmp [mst.treemap], 0 |
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165 | je .from_top |
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166 | |||
167 | call malloc_large ;esi= nb |
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168 | test eax, eax |
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169 | jne .done |
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1210 | Lrz | 170 | align 4 |
276 | serge | 171 | .from_top: |
172 | |||
173 | ; if (nb < ms.topsize) |
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174 | |||
175 | mov eax, [mst.topsize] |
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176 | cmp esi, eax |
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177 | jae .fail |
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178 | |||
179 | ; rsize = ms.topsize -= nb; |
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180 | ; p = ms.top; |
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181 | |||
182 | mov ecx, [mst.top] |
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183 | sub eax, esi |
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184 | mov [mst.topsize], eax |
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185 | |||
186 | ; r = ms.top = chunk_plus_offset(p, nb); |
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187 | ; r->head = rsize | PINUSE_BIT; |
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188 | ; p->head = nb |PINUSE_BIT|CINUSE_BIT; |
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189 | |||
190 | lea edx, [ecx+esi] |
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191 | or eax, 1 |
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192 | mov [mst.top], edx |
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193 | or esi, 3 |
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194 | mov [edx+4], eax |
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195 | mov [ecx+4], esi |
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196 | lea eax, [ecx+8] |
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197 | pop esi |
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198 | and [mst.mutex], 0 |
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199 | ret |
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1210 | Lrz | 200 | align 4 |
276 | serge | 201 | .fail: |
202 | xor eax, eax |
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203 | pop esi |
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204 | and [mst.mutex], 0 |
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205 | ret |
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206 | |||
207 | ; param |
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208 | ; eax= mem |
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209 | |||
210 | align 4 |
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211 | free: |
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212 | push edi |
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213 | mov edi, eax |
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214 | add edi, -8 |
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215 | |||
216 | ; if(p->head & CINUSE_BIT) |
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217 | |||
218 | test byte [edi+4], 2 |
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219 | je .fail |
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220 | |||
221 | mov ebx, mst.mutex |
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222 | call wait_mutex ;ebx |
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223 | |||
224 | ; psize = p->head & (~3); |
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225 | |||
226 | mov eax, [edi+4] |
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227 | push esi |
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228 | mov esi, eax |
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229 | and esi, -4 |
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230 | |||
231 | ; next = chunk_plus_offset(p, psize); |
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232 | ; if(!(p->head & PINUSE_BIT)) |
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233 | |||
234 | test al, 1 |
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235 | lea ebx, [esi+edi] |
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236 | jne .next |
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237 | |||
238 | ; prevsize = p->prev_foot; |
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239 | ; prev=p - prevsize; |
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240 | ; psize += prevsize; |
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241 | ; p = prev; |
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242 | |||
243 | mov ecx, [edi] ;ecx= prevsize |
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244 | add esi, ecx ;esi= psize |
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245 | sub edi, ecx ;edi= p |
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246 | |||
247 | ; if (prevsize < 256) |
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248 | |||
249 | cmp ecx, 256 |
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250 | jae .unlink_large |
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251 | |||
252 | mov eax, [edi+8] ;F = p->fd; |
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253 | mov edx, [edi+12] ;B = p->bk; |
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254 | |||
255 | ; if (F == B) |
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256 | ; ms.smallmap &= ~(1<< I); |
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257 | shr ecx, 3 |
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258 | cmp eax, edx |
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259 | jne @F |
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260 | and [mst.smallmap], ecx |
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1210 | Lrz | 261 | align 4 |
276 | serge | 262 | @@: |
263 | mov [eax+12], edx ;F->bk = B; |
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264 | mov [edx+8], eax ;B->fd = F |
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265 | jmp .next |
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1210 | Lrz | 266 | align 4 |
276 | serge | 267 | .unlink_large: |
268 | mov edx, edi |
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269 | call unlink_large_chunk |
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1210 | Lrz | 270 | align 4 |
276 | serge | 271 | .next: |
272 | |||
273 | ; if(next->head & PINUSE_BIT) |
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274 | |||
275 | mov eax, [ebx+4] |
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276 | test al, 1 |
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277 | jz .fail2 |
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278 | |||
279 | ; if (! (next->head & CINUSE_BIT)) |
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280 | |||
281 | test al, 2 |
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282 | jnz .fix_next |
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283 | |||
284 | ; if (next == ms.top) |
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285 | |||
286 | cmp ebx, [mst.top] |
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287 | jne @F |
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288 | |||
289 | ; tsize = ms.topsize += psize; |
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290 | |||
291 | mov eax, [mst.topsize] |
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292 | add eax, esi |
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293 | mov [mst.topsize], eax |
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294 | |||
295 | ; ms.top = p; |
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296 | ; p->head = tsize | PINUSE_BIT; |
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297 | |||
298 | or eax, 1 |
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299 | mov [mst.top], edi |
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300 | mov [edi+4], eax |
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1210 | Lrz | 301 | align 4 |
276 | serge | 302 | .fail2: |
303 | and [mst.mutex], 0 |
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304 | pop esi |
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1210 | Lrz | 305 | align 4 |
276 | serge | 306 | .fail: |
307 | pop edi |
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308 | ret |
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1210 | Lrz | 309 | align 4 |
276 | serge | 310 | @@: |
311 | |||
312 | ; nsize = next->head & ~INUSE_BITS; |
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313 | |||
314 | and eax, -4 |
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315 | add esi, eax ;psize += nsize; |
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316 | |||
317 | ; if (nsize < 256) |
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318 | |||
319 | cmp eax, 256 |
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320 | jae .unl_large |
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321 | |||
322 | mov edx, [ebx+8] ;F = next->fd |
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323 | mov ebx, [ebx+12] ;B = next->bk |
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324 | |||
325 | ; if (F == B) |
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326 | |||
327 | cmp edx, ebx |
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328 | jne @F |
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329 | mov ecx, eax |
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330 | shr ecx, 3 |
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331 | btr [mst.smallmap], ecx |
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1210 | Lrz | 332 | align 4 |
276 | serge | 333 | @@: |
334 | mov [edx+12], ebx ;F->bk = B |
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335 | |||
336 | ; p->head = psize|PINUSE_BIT; |
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337 | |||
338 | mov ecx, esi |
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339 | mov [ebx+8], edx |
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340 | or ecx, 1 |
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341 | mov [edi+4], ecx |
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342 | |||
343 | ; (p+psize)->prev_foot = psize; |
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344 | |||
345 | mov [esi+edi], esi |
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346 | |||
347 | ; insert_chunk(p,psize); |
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348 | |||
349 | mov eax, esi |
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350 | pop esi |
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351 | mov ecx, edi |
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352 | pop edi |
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353 | jmp insert_chunk |
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1210 | Lrz | 354 | align 4 |
276 | serge | 355 | .unl_large: |
356 | |||
357 | ; unlink_large_chunk((tchunkptr)next); |
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358 | |||
359 | mov edx, ebx |
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360 | call unlink_large_chunk |
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361 | ; p->head = psize|PINUSE_BIT; |
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362 | |||
363 | mov ecx, esi |
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364 | or ecx, 1 |
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365 | mov [edi+4], ecx |
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366 | |||
367 | ; (p+psize)->prev_foot = psize; |
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368 | |||
369 | mov [esi+edi], esi |
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370 | |||
371 | ; insert_chunk(p,psize); |
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372 | |||
373 | mov eax, esi |
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374 | pop esi |
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375 | mov ecx, edi |
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376 | pop edi |
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377 | jmp insert_chunk |
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1210 | Lrz | 378 | align 4 |
276 | serge | 379 | .fix_next: |
380 | |||
381 | ; (p+psize)->prev_foot = psize; |
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382 | ; next->head &= ~PINUSE_BIT; |
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383 | ; p->head = psize|PINUSE_BIT; |
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384 | |||
385 | and eax, -2 |
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386 | mov edx, esi |
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387 | mov [ebx+4], eax |
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388 | or edx, 1 |
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389 | mov [edi+4], edx |
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390 | |||
391 | ; (p+psize)->prev_foot = psize; |
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392 | |||
393 | mov [esi+edi], esi |
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394 | ; insert_chunk(p,psize); |
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395 | |||
396 | mov eax, esi |
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397 | pop esi |
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398 | mov ecx, edi |
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399 | pop edi |
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400 | jmp insert_chunk |
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401 | |||
402 | ; param |
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403 | ; ecx = chunk |
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404 | ; eax = size |
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405 | |||
406 | align 4 |
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407 | insert_chunk: |
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408 | |||
409 | cmp eax, 256 |
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410 | push esi |
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411 | mov esi, ecx |
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412 | jae .large |
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413 | |||
414 | ; I = S>>3; |
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415 | ; ms.smallmap |= 1<< I; |
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416 | |||
417 | shr eax, 3 |
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418 | bts [mst.smallmap], eax |
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419 | |||
420 | ; B = &ms.smallbins[I]; |
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421 | |||
422 | shl eax, 4 |
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423 | add eax, mst.smallbins |
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424 | mov edx, [eax+8] ;F = B->fd |
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425 | mov [eax+8], esi ;B->fd = P |
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426 | mov [edx+12], esi ;F->bk = P |
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427 | mov [esi+8], edx ;P->fd = F |
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428 | mov [esi+12], eax ;P->bk = B |
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429 | pop esi |
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430 | and [mst.mutex], 0 |
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431 | ret |
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1210 | Lrz | 432 | align 4 |
276 | serge | 433 | .large: |
434 | mov ebx, eax |
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435 | call insert_large_chunk |
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436 | pop esi |
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437 | and [mst.mutex], 0 |
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438 | ret |
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439 | |||
440 | align 4 |
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441 | |||
442 | ; param |
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443 | ; esi= chunk |
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444 | ; ebx= size |
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445 | |||
446 | align 4 |
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447 | insert_large_chunk: |
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448 | |||
449 | ; I = compute_tree_index(S); |
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450 | |||
451 | mov edx, ebx |
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452 | shr edx, 8 |
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453 | bsr eax, edx |
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454 | lea ecx, [eax+7] |
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455 | mov edx, ebx |
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456 | shr edx, cl |
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457 | and edx, 1 |
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458 | lea ecx, [edx+eax*2] |
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459 | |||
460 | ; X->index = I; |
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461 | mov dword [esi+28], ecx |
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462 | |||
463 | ; X->child[0] = X->child[1] = 0; |
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464 | and dword [esi+20], 0 |
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465 | and dword [esi+16], 0 |
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466 | |||
467 | ; H = &ms.treebins[I]; |
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468 | |||
469 | mov eax, ecx |
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470 | lea edx, [mst.treebins+eax*4] |
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471 | |||
472 | ; if (!(ms.treemap & 1< |
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473 | bt [mst.treemap], ecx |
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474 | jc .tree |
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475 | |||
476 | ; ms.treemap |= 1< |
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477 | bts [mst.treemap], ecx |
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478 | ; *H = X; |
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479 | mov dword [edx], esi |
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480 | jmp .done |
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1210 | Lrz | 481 | align 4 |
276 | serge | 482 | .tree: |
483 | |||
484 | ; T = *H; |
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485 | mov edx, [edx] |
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486 | |||
487 | ; K = S << leftshift_for_tree_index(I); |
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488 | mov eax, ecx |
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489 | shr eax, 1 |
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490 | sub ecx, 31 |
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491 | mov edi, 37 |
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492 | sub edi, eax |
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493 | neg ecx |
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494 | sbb ecx, ecx |
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495 | and ecx, edi |
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496 | mov eax, ebx |
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497 | shl eax, cl ;eax= K |
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498 | |||
499 | jmp .loop |
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1210 | Lrz | 500 | align 4 |
276 | serge | 501 | .not_eq_size: |
502 | |||
503 | ; C = &(T->child[(K >> 31) & 1]); |
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504 | mov ecx, eax |
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505 | shr ecx, 31 |
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506 | lea ecx, [edx+ecx*4+16] |
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507 | |||
508 | ; K <<= 1; |
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509 | ; if (*C != 0) |
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510 | mov edi, [ecx] |
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511 | add eax, eax |
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512 | test edi, edi |
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513 | jz .insert_child |
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514 | |||
515 | ; T = *C; |
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516 | mov edx, edi |
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1210 | Lrz | 517 | align 4 |
276 | serge | 518 | .loop: |
519 | |||
520 | ; for (;;) |
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521 | ; if ((T->head & ~INUSE_BITS) != S) |
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522 | |||
523 | mov ecx, [edx+4] |
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524 | and ecx, not 3 |
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525 | cmp ecx, ebx |
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526 | jne .not_eq_size |
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527 | |||
528 | ; F = T->fd; |
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529 | mov eax, [edx+8] |
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530 | |||
531 | ; T->fd = F->bk = X; |
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532 | mov [eax+12], esi |
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533 | mov [edx+8], esi |
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534 | |||
535 | ; X->fd = F; |
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536 | ; X->bk = T; |
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537 | ; X->parent = 0; |
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538 | |||
539 | and dword [esi+24], 0 |
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540 | mov [esi+8], eax |
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541 | mov [esi+12], edx |
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542 | ret |
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1210 | Lrz | 543 | align 4 |
276 | serge | 544 | .insert_child: |
545 | |||
546 | ; *C = X; |
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547 | mov [ecx], esi |
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1210 | Lrz | 548 | align 4 |
276 | serge | 549 | .done: |
550 | |||
551 | ; X->parent = T; |
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552 | mov [esi+24], edx |
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553 | |||
554 | ; X->fd = X->bk = X; |
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555 | mov [esi+12], esi |
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556 | mov [esi+8], esi |
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557 | ret |
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558 | |||
559 | |||
560 | ; param |
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561 | ; edx= chunk |
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562 | |||
563 | align 4 |
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564 | unlink_large_chunk: |
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565 | |||
566 | mov eax, [edx+12] |
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567 | cmp eax, edx |
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568 | push edi |
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569 | mov edi, [edx+24] |
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570 | je @F |
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571 | |||
572 | mov ecx, [edx+8] ;F = X->fd |
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573 | mov [ecx+12], eax ;F->bk = R; |
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574 | mov [eax+8], ecx ;R->fd = F |
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575 | jmp .parent |
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1210 | Lrz | 576 | align 4 |
276 | serge | 577 | @@: |
578 | mov eax, [edx+20] |
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579 | test eax, eax |
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580 | push esi |
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581 | lea esi, [edx+20] |
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582 | jne .loop |
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583 | |||
584 | mov eax, [edx+16] |
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585 | test eax, eax |
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586 | lea esi, [edx+16] |
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587 | je .l2 |
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1210 | Lrz | 588 | align 4 |
276 | serge | 589 | .loop: |
590 | cmp dword [eax+20], 0 |
||
591 | lea ecx, [eax+20] |
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592 | jne @F |
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593 | |||
594 | cmp dword [eax+16], 0 |
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595 | lea ecx, [eax+16] |
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596 | je .l1 |
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1210 | Lrz | 597 | align 4 |
276 | serge | 598 | @@: |
599 | mov eax, [ecx] |
||
600 | mov esi, ecx |
||
601 | jmp .loop |
||
1210 | Lrz | 602 | align 4 |
276 | serge | 603 | .l1: |
604 | mov dword [esi], 0 |
||
1210 | Lrz | 605 | align 4 |
276 | serge | 606 | .l2: |
607 | pop esi |
||
1210 | Lrz | 608 | align 4 |
276 | serge | 609 | .parent: |
610 | test edi, edi |
||
611 | je .done |
||
612 | |||
613 | mov ecx, [edx+28] |
||
614 | cmp edx, [mst.treebins+ecx*4] |
||
615 | lea ecx, [mst.treebins+ecx*4] |
||
616 | jne .l3 |
||
617 | |||
618 | test eax, eax |
||
619 | mov [ecx], eax |
||
620 | jne .l5 |
||
621 | |||
622 | mov ecx, [edx+28] |
||
623 | btr [mst.treemap], ecx |
||
624 | pop edi |
||
625 | ret |
||
1210 | Lrz | 626 | align 4 |
276 | serge | 627 | .l3: |
628 | cmp [edi+16], edx |
||
629 | jne @F |
||
630 | |||
631 | mov [edi+16], eax |
||
632 | jmp .l4 |
||
1210 | Lrz | 633 | align 4 |
276 | serge | 634 | @@: |
635 | mov [edi+20], eax |
||
1210 | Lrz | 636 | align 4 |
276 | serge | 637 | .l4: |
638 | test eax, eax |
||
639 | je .done |
||
1210 | Lrz | 640 | align 4 |
276 | serge | 641 | .l5: |
642 | mov [eax+24], edi |
||
643 | mov ecx, [edx+16] |
||
644 | test ecx, ecx |
||
645 | je .l6 |
||
646 | |||
647 | mov [eax+16], ecx |
||
648 | mov [ecx+24], eax |
||
1210 | Lrz | 649 | align 4 |
276 | serge | 650 | .l6: |
651 | mov edx, [edx+20] |
||
652 | test edx, edx |
||
653 | je .done |
||
654 | |||
655 | mov [eax+20], edx |
||
656 | mov [edx+24], eax |
||
1210 | Lrz | 657 | align 4 |
276 | serge | 658 | .done: |
659 | pop edi |
||
660 | ret |
||
661 | |||
662 | ; param |
||
663 | ; esi= nb |
||
664 | |||
665 | align 4 |
||
666 | malloc_small: |
||
667 | push ebp |
||
668 | mov ebp, esi |
||
669 | |||
670 | push edi |
||
671 | |||
672 | bsf eax,[mst.treemap] |
||
673 | mov ecx, [mst.treebins+eax*4] |
||
674 | |||
675 | ; rsize = (t->head & ~INUSE_BITS) - nb; |
||
676 | |||
677 | mov edi, [ecx+4] |
||
678 | and edi, -4 |
||
679 | sub edi, esi |
||
1210 | Lrz | 680 | align 4 |
276 | serge | 681 | .loop: |
682 | mov ebx, ecx |
||
1210 | Lrz | 683 | align 4 |
276 | serge | 684 | .loop_1: |
685 | |||
686 | ; while ((t = leftmost_child(t)) != 0) |
||
687 | |||
688 | mov eax, [ecx+16] |
||
689 | test eax, eax |
||
690 | jz @F |
||
691 | mov ecx, eax |
||
692 | jmp .l1 |
||
1210 | Lrz | 693 | align 4 |
276 | serge | 694 | @@: |
695 | mov ecx, [ecx+20] |
||
1210 | Lrz | 696 | align 4 |
276 | serge | 697 | .l1: |
698 | test ecx, ecx |
||
699 | jz .unlink |
||
700 | |||
701 | ; trem = (t->head & ~INUSE_BITS) - nb; |
||
702 | |||
703 | mov eax, [ecx+4] |
||
704 | and eax, -4 |
||
705 | sub eax, ebp |
||
706 | |||
707 | ; if (trem < rsize) |
||
708 | |||
709 | cmp eax, edi |
||
710 | jae .loop_1 |
||
711 | |||
712 | ; rsize = trem; |
||
713 | |||
714 | mov edi, eax |
||
715 | jmp .loop |
||
716 | .unlink: |
||
717 | |||
718 | |||
719 | ; r = chunk_plus_offset((mchunkptr)v, nb); |
||
720 | ; unlink_large_chunk(v); |
||
721 | |||
722 | mov edx, ebx |
||
723 | lea esi, [ebx+ebp] |
||
724 | call unlink_large_chunk |
||
725 | |||
726 | ; if (rsize < 16) |
||
727 | |||
728 | cmp edi, 16 |
||
729 | jae .split |
||
730 | |||
731 | ; v->head = (rsize + nb)|PINUSE_BIT|CINUSE_BIT; |
||
732 | |||
733 | lea ecx, [edi+ebp] |
||
734 | |||
735 | ; (v+rsize + nb)->head |= PINUSE_BIT; |
||
736 | |||
737 | add edi, ebx |
||
738 | lea eax, [edi+ebp+4] |
||
739 | pop edi |
||
740 | or ecx, 3 |
||
741 | mov [ebx+4], ecx |
||
742 | or dword [eax], 1 |
||
743 | pop ebp |
||
744 | |||
745 | lea eax, [ebx+8] |
||
746 | ret |
||
1210 | Lrz | 747 | align 4 |
276 | serge | 748 | .split: |
749 | |||
750 | ; v->head = nb|PINUSE_BIT|CINUSE_BIT; |
||
751 | ; r->head = rsize|PINUSE_BIT; |
||
752 | ; (r+rsize)->prev_foot = rsize; |
||
753 | |||
754 | or ebp, 3 |
||
755 | mov edx, edi |
||
756 | or edx, 1 |
||
757 | |||
758 | cmp edi, 256 |
||
759 | mov [ebx+4], ebp |
||
760 | mov [esi+4], edx |
||
761 | mov [esi+edi], edi |
||
762 | jae .large |
||
763 | |||
764 | shr edi, 3 |
||
765 | bts [mst.smallmap], edi |
||
766 | |||
767 | mov eax, edi |
||
768 | shl eax, 4 |
||
769 | add eax, mst.smallbins |
||
770 | |||
771 | mov edx, [eax+8] |
||
772 | mov [eax+8], esi |
||
773 | mov [edx+12], esi |
||
774 | pop edi |
||
775 | mov [esi+12], eax |
||
776 | mov [esi+8], edx |
||
777 | pop ebp |
||
778 | lea eax, [ebx+8] |
||
779 | ret |
||
1210 | Lrz | 780 | align 4 |
276 | serge | 781 | .large: |
782 | lea eax, [ebx+8] |
||
783 | push eax |
||
784 | mov ebx, edi |
||
785 | call insert_large_chunk |
||
786 | pop eax |
||
787 | pop edi |
||
788 | pop ebp |
||
789 | ret |
||
790 | |||
791 | |||
792 | ; param |
||
793 | ; esi= nb |
||
794 | |||
795 | align 4 |
||
796 | malloc_large: |
||
797 | .idx equ esp+4 |
||
798 | .rst equ esp |
||
799 | |||
800 | push ebp |
||
801 | push edi |
||
802 | sub esp, 8 |
||
803 | ; v = 0; |
||
804 | ; rsize = -nb; |
||
805 | |||
806 | mov edi, esi |
||
807 | mov ebx, esi |
||
808 | xor ebp, ebp |
||
809 | neg edi |
||
810 | |||
811 | ; idx = compute_tree_index(nb); |
||
812 | |||
813 | mov edx, esi |
||
814 | shr edx, 8 |
||
815 | bsr eax, edx |
||
816 | lea ecx, [eax+7] |
||
817 | shr esi, cl |
||
818 | and esi, 1 |
||
819 | lea ecx, [esi+eax*2] |
||
820 | mov [.idx], ecx |
||
821 | |||
822 | ; if ((t = ms.treebins[idx]) != 0) |
||
823 | |||
824 | mov eax, [mst.treebins+ecx*4] |
||
825 | test eax, eax |
||
826 | jz .l3 |
||
827 | |||
828 | ; sizebits = nb << leftshift_for_tree_index(idx); |
||
829 | |||
830 | cmp ecx, 31 |
||
831 | jne @F |
||
832 | xor ecx, ecx |
||
833 | jmp .l1 |
||
1210 | Lrz | 834 | align 4 |
276 | serge | 835 | @@: |
836 | mov edx, ecx |
||
837 | shr edx, 1 |
||
838 | mov ecx, 37 |
||
839 | sub ecx, edx |
||
1210 | Lrz | 840 | align 4 |
276 | serge | 841 | .l1: |
842 | mov edx, ebx |
||
843 | shl edx, cl |
||
844 | |||
845 | ; rst = 0; |
||
846 | mov [.rst], ebp |
||
1210 | Lrz | 847 | align 4 |
276 | serge | 848 | .loop: |
849 | |||
850 | ; trem = (t->head & ~INUSE_BITS) - nb; |
||
851 | |||
852 | mov ecx, [eax+4] |
||
853 | and ecx, -4 |
||
854 | sub ecx, ebx |
||
855 | |||
856 | ; if (trem < rsize) |
||
857 | |||
858 | cmp ecx, edi |
||
859 | jae @F |
||
860 | ; v = t; |
||
861 | ; if ((rsize = trem) == 0) |
||
862 | |||
863 | test ecx, ecx |
||
864 | mov ebp, eax |
||
865 | mov edi, ecx |
||
866 | je .l2 |
||
1210 | Lrz | 867 | align 4 |
276 | serge | 868 | @@: |
869 | |||
870 | ; rt = t->child[1]; |
||
871 | |||
872 | mov ecx, [eax+20] |
||
873 | |||
874 | ; t = t->child[(sizebits >> 31) & 1]; |
||
875 | |||
876 | mov esi, edx |
||
877 | shr esi, 31 |
||
878 | |||
879 | ; if (rt != 0 && rt != t) |
||
880 | |||
881 | test ecx, ecx |
||
882 | mov eax, [eax+esi*4+16] |
||
883 | jz @F |
||
884 | cmp ecx, eax |
||
885 | jz @F |
||
886 | |||
887 | ; rst = rt; |
||
888 | mov [.rst], ecx |
||
1210 | Lrz | 889 | align 4 |
276 | serge | 890 | @@: |
891 | ; if (t == 0) |
||
892 | |||
893 | test eax, eax |
||
894 | jz @F |
||
895 | |||
896 | ; sizebits <<= 1; |
||
897 | |||
898 | add edx, edx |
||
899 | jmp .loop |
||
1210 | Lrz | 900 | align 4 |
276 | serge | 901 | @@: |
902 | ; t = rst; |
||
903 | mov eax, [.rst] |
||
1210 | Lrz | 904 | align 4 |
276 | serge | 905 | .l2: |
906 | ; if (t == 0 && v == 0) |
||
907 | |||
908 | test eax, eax |
||
909 | jne .l4 |
||
910 | test ebp, ebp |
||
911 | jne .l7 |
||
912 | mov ecx, [.idx] |
||
1210 | Lrz | 913 | align 4 |
276 | serge | 914 | .l3: |
915 | |||
916 | ; leftbits = (-1< |
||
917 | ; if (leftbits != 0) |
||
918 | |||
919 | or edx, -1 |
||
920 | shl edx, cl |
||
921 | and edx, [mst.treemap] |
||
922 | jz @F |
||
923 | |||
924 | bsf eax, edx |
||
925 | ; t = ms.treebins[i]; |
||
926 | mov eax, [mst.treebins+eax*4] |
||
1210 | Lrz | 927 | align 4 |
276 | serge | 928 | @@: |
929 | |||
930 | ; while (t != 0) |
||
931 | test eax, eax |
||
932 | jz .l5 |
||
1210 | Lrz | 933 | align 4 |
276 | serge | 934 | .l4: |
935 | |||
936 | ; trem = (t->head & ~INUSE_BITS) - nb; |
||
937 | |||
938 | mov ecx, [eax+4] |
||
939 | and ecx, -4 |
||
940 | sub ecx, ebx |
||
941 | |||
942 | ; if (trem < rsize) |
||
943 | |||
944 | cmp ecx, edi |
||
945 | jae @F |
||
946 | ; rsize = trem; |
||
947 | |||
948 | mov edi, ecx |
||
949 | ; v = t; |
||
950 | mov ebp, eax |
||
1210 | Lrz | 951 | align 4 |
276 | serge | 952 | @@: |
953 | |||
954 | ; t = leftmost_child(t); |
||
955 | |||
956 | mov ecx, [eax+16] |
||
957 | test ecx, ecx |
||
958 | je @F |
||
959 | mov eax, ecx |
||
960 | jmp .l6 |
||
1210 | Lrz | 961 | align 4 |
276 | serge | 962 | @@: |
963 | mov eax, [eax+20] |
||
1210 | Lrz | 964 | align 4 |
276 | serge | 965 | .l6: |
966 | |||
967 | ; while (t != 0) |
||
968 | |||
969 | test eax, eax |
||
970 | jne .l4 |
||
1210 | Lrz | 971 | align 4 |
276 | serge | 972 | .l5: |
973 | |||
974 | ; if (v != 0) |
||
975 | |||
976 | test ebp, ebp |
||
977 | jz .done |
||
1210 | Lrz | 978 | align 4 |
276 | serge | 979 | .l7: |
980 | |||
981 | ; r = chunk_plus_offset((mchunkptr)v, nb); |
||
982 | ; unlink_large_chunk(v); |
||
983 | |||
984 | mov edx, ebp |
||
985 | lea esi, [ebx+ebp] |
||
986 | call unlink_large_chunk |
||
987 | |||
326 | serge | 988 | ; if (rsize < 16) |
276 | serge | 989 | |
326 | serge | 990 | cmp edi, 16 |
276 | serge | 991 | jae .large |
992 | |||
993 | ; v->head = (rsize + nb)|PINUSE_BIT|CINUSE_BIT; |
||
994 | |||
995 | lea ecx, [edi+ebx] |
||
996 | |||
997 | ; (v+rsize + nb)->head |= PINUSE_BIT; |
||
998 | |||
999 | add edi, ebp |
||
1000 | lea eax, [edi+ebx+4] |
||
1001 | or ecx, 3 |
||
1002 | mov [ebp+4], ecx |
||
1003 | or dword [eax], 1 |
||
1004 | lea eax, [ebp+8] |
||
1005 | add esp, 8 |
||
1006 | pop edi |
||
1007 | pop ebp |
||
1008 | ret |
||
1210 | Lrz | 1009 | align 4 |
276 | serge | 1010 | .large: |
1011 | |||
1012 | ; v->head = nb|PINUSE_BIT|CINUSE_BIT; |
||
1013 | ; r->head = rsize|PINUSE_BIT; |
||
1014 | |||
1015 | mov edx, edi |
||
1016 | or ebx, 3 |
||
1017 | mov [ebp+4], ebx |
||
1018 | or edx, 1 |
||
1019 | mov [esi+4], edx |
||
1020 | |||
1021 | ; (r+rsize)->prev_foot = rsize; |
||
1022 | ; insert_large_chunk((tchunkptr)r, rsize); |
||
1023 | |||
1024 | mov [esi+edi], edi |
||
326 | serge | 1025 | mov eax, edi |
1026 | mov ecx, esi |
||
1027 | call insert_chunk |
||
276 | serge | 1028 | |
1029 | lea eax, [ebp+8] |
||
1030 | add esp, 8 |
||
1031 | pop edi |
||
1032 | pop ebp |
||
1033 | ret |
||
1210 | Lrz | 1034 | align 4 |
276 | serge | 1035 | .done: |
1036 | add esp, 8 |
||
1037 | pop edi |
||
1038 | pop ebp |
||
1039 | xor eax, eax |
||
1040 | ret |
||
1041 | |||
1042 | align 4 |
||
1043 | init_malloc: |
||
1044 | |||
753 | serge | 1045 | stdcall kernel_alloc, 0x40000 |
276 | serge | 1046 | |
1047 | mov [mst.top], eax |
||
1048 | mov [mst.topsize], 128*1024 |
||
1049 | mov dword [eax+4], (128*1024) or 1 |
||
1050 | mov eax, mst.smallbins |
||
1210 | Lrz | 1051 | align 4 |
276 | serge | 1052 | @@: |
1053 | mov [eax+8], eax |
||
1054 | mov [eax+12], eax |
||
1055 | add eax, 16 |
||
1056 | cmp eax, mst.smallbins+512 |
||
465 | serge | 1057 | jb @B |
276 | serge | 1058 | |
1059 | ret>> |
||
1060 | |||
1061 | |||
1062 | |||
1063 |