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Rev | Author | Line No. | Line |
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431 | serge | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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1292 | diamond | 3 | ;; Copyright (C) KolibriOS team 2004-2009. All rights reserved. ;; |
431 | serge | 4 | ;; Distributed under terms of the GNU General Public License ;; |
5 | ;; ;; |
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6 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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7 | |||
593 | mikedld | 8 | $Revision: 1333 $ |
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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1211 | Lrz | 23 | align 16 |
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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72 | @@: |
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73 | |||
74 | ; B->fd = F; |
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75 | ; F->bk = B; |
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76 | ; if(rsize<16) |
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77 | |||
78 | cmp ecx, 16 |
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79 | mov [edi+8], eax |
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80 | mov [eax+12], edi |
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81 | jae .split |
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82 | |||
83 | ; p->head = psize|PINUSE_BIT|CINUSE_BIT; |
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84 | ; (p + psize)->head |= PINUSE_BIT; |
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85 | |||
86 | lea eax, [edx+8] |
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87 | or dword [edx+ebp+4], 1 |
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88 | |||
89 | or ebp, 3 |
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90 | mov [edx+4], ebp |
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91 | |||
92 | pop edi |
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93 | pop ebp |
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94 | .done: |
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95 | pop esi |
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96 | mov [mst.mutex], 0 |
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97 | ret |
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98 | .split: |
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99 | lea ebx, [edx+8] ;ebx=mem |
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100 | |||
101 | ; r = chunk_plus_offset(p, nb); |
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102 | ; p->head = nb|PINUSE_BIT|CINUSE_BIT; |
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103 | ; r->head = rsize|PINUSE_BIT; |
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104 | |||
105 | lea eax, [edx+esi] ;eax= r |
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106 | or esi, 3 |
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107 | mov [edx+4], esi |
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108 | |||
109 | mov edx, ecx |
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110 | or edx, 1 |
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111 | mov [eax+4], edx |
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112 | |||
113 | ; (r + rsize)->prev_foot = rsize; |
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114 | |||
115 | mov [eax+ecx], ecx |
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116 | |||
117 | ; I = rsize>>3; |
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118 | |||
119 | shr ecx, 3 |
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120 | |||
121 | ; ms.smallmap |= 1<< I; |
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122 | bts [mst.smallmap], ecx |
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123 | |||
124 | ; B = &ms.smallbins[I]; |
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125 | |||
126 | shl ecx, 4 |
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127 | pop edi |
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128 | pop ebp |
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129 | add ecx, mst.smallbins ;ecx= B |
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130 | |||
131 | mov edx, [ecx+8] ; F = B->fd; |
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132 | mov [ecx+8], eax ; B->fd = r; |
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133 | mov [edx+12], eax ; F->bk = r; |
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134 | mov [eax+8], edx ; r->fd = F; |
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135 | mov [eax+12], ecx ; r->bk = B; |
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136 | mov eax, ebx |
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137 | pop esi |
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1292 | diamond | 138 | mov [mst.mutex], 0 |
276 | serge | 139 | ret |
140 | .small: |
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141 | |||
142 | ; if (ms.treemap != 0 && (mem = malloc_small(nb)) != 0) |
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1210 | Lrz | 143 | ;;;;;;;;;;; start a change |
144 | mov eax,[mst.treemap] |
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145 | test eax,eax |
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146 | ;;;;;;;;;;; end the change |
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147 | ; cmp [mst.treemap], 0 |
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148 | jz .from_top |
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276 | serge | 149 | mov eax, esi |
150 | call malloc_small |
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151 | test eax, eax |
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152 | jz .from_top |
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153 | pop esi |
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154 | and [mst.mutex], 0 |
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155 | ret |
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156 | .large: |
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157 | |||
158 | ; if (ms.treemap != 0 && (mem = malloc_large(nb)) != 0) |
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159 | |||
160 | cmp [mst.treemap], 0 |
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161 | je .from_top |
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162 | |||
163 | call malloc_large ;esi= nb |
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164 | test eax, eax |
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165 | jne .done |
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166 | .from_top: |
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167 | |||
168 | ; if (nb < ms.topsize) |
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169 | |||
170 | mov eax, [mst.topsize] |
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171 | cmp esi, eax |
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172 | jae .fail |
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173 | |||
174 | ; rsize = ms.topsize -= nb; |
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175 | ; p = ms.top; |
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176 | |||
177 | mov ecx, [mst.top] |
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178 | sub eax, esi |
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179 | mov [mst.topsize], eax |
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180 | |||
181 | ; r = ms.top = chunk_plus_offset(p, nb); |
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182 | ; r->head = rsize | PINUSE_BIT; |
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183 | ; p->head = nb |PINUSE_BIT|CINUSE_BIT; |
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184 | |||
185 | lea edx, [ecx+esi] |
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186 | or eax, 1 |
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187 | mov [mst.top], edx |
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188 | or esi, 3 |
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189 | mov [edx+4], eax |
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190 | mov [ecx+4], esi |
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191 | lea eax, [ecx+8] |
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192 | pop esi |
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193 | and [mst.mutex], 0 |
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194 | ret |
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195 | .fail: |
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196 | xor eax, eax |
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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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200 | |||
201 | ; param |
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202 | ; eax= mem |
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203 | |||
204 | free: |
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205 | push edi |
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206 | mov edi, eax |
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207 | add edi, -8 |
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208 | |||
209 | ; if(p->head & CINUSE_BIT) |
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210 | |||
211 | test byte [edi+4], 2 |
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212 | je .fail |
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213 | |||
214 | mov ebx, mst.mutex |
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215 | call wait_mutex ;ebx |
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216 | |||
217 | ; psize = p->head & (~3); |
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218 | |||
219 | mov eax, [edi+4] |
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220 | push esi |
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221 | mov esi, eax |
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222 | and esi, -4 |
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223 | |||
224 | ; next = chunk_plus_offset(p, psize); |
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225 | ; if(!(p->head & PINUSE_BIT)) |
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226 | |||
227 | test al, 1 |
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228 | lea ebx, [esi+edi] |
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229 | jne .next |
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230 | |||
231 | ; prevsize = p->prev_foot; |
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232 | ; prev=p - prevsize; |
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233 | ; psize += prevsize; |
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234 | ; p = prev; |
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235 | |||
236 | mov ecx, [edi] ;ecx= prevsize |
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237 | add esi, ecx ;esi= psize |
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238 | sub edi, ecx ;edi= p |
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239 | |||
240 | ; if (prevsize < 256) |
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241 | |||
242 | cmp ecx, 256 |
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243 | jae .unlink_large |
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244 | |||
245 | mov eax, [edi+8] ;F = p->fd; |
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246 | mov edx, [edi+12] ;B = p->bk; |
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247 | |||
248 | ; if (F == B) |
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249 | ; ms.smallmap &= ~(1<< I); |
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250 | shr ecx, 3 |
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251 | cmp eax, edx |
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252 | jne @F |
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1333 | diamond | 253 | btr [mst.smallmap], ecx |
276 | serge | 254 | @@: |
255 | mov [eax+12], edx ;F->bk = B; |
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256 | mov [edx+8], eax ;B->fd = F |
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257 | jmp .next |
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258 | .unlink_large: |
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259 | mov edx, edi |
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260 | call unlink_large_chunk |
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261 | .next: |
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262 | |||
263 | ; if(next->head & PINUSE_BIT) |
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264 | |||
265 | mov eax, [ebx+4] |
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266 | test al, 1 |
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267 | jz .fail2 |
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268 | |||
269 | ; if (! (next->head & CINUSE_BIT)) |
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270 | |||
271 | test al, 2 |
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272 | jnz .fix_next |
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273 | |||
274 | ; if (next == ms.top) |
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275 | |||
276 | cmp ebx, [mst.top] |
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277 | jne @F |
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278 | |||
279 | ; tsize = ms.topsize += psize; |
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280 | |||
281 | mov eax, [mst.topsize] |
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282 | add eax, esi |
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283 | mov [mst.topsize], eax |
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284 | |||
285 | ; ms.top = p; |
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286 | ; p->head = tsize | PINUSE_BIT; |
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287 | |||
288 | or eax, 1 |
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289 | mov [mst.top], edi |
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290 | mov [edi+4], eax |
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291 | .fail2: |
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292 | and [mst.mutex], 0 |
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293 | pop esi |
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294 | .fail: |
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295 | pop edi |
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296 | ret |
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297 | @@: |
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298 | |||
299 | ; nsize = next->head & ~INUSE_BITS; |
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300 | |||
301 | and eax, -4 |
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302 | add esi, eax ;psize += nsize; |
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303 | |||
304 | ; if (nsize < 256) |
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305 | |||
306 | cmp eax, 256 |
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307 | jae .unl_large |
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308 | |||
309 | mov edx, [ebx+8] ;F = next->fd |
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310 | mov ebx, [ebx+12] ;B = next->bk |
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311 | |||
312 | ; if (F == B) |
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313 | |||
314 | cmp edx, ebx |
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315 | jne @F |
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316 | mov ecx, eax |
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317 | shr ecx, 3 |
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318 | btr [mst.smallmap], ecx |
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319 | @@: |
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320 | mov [edx+12], ebx ;F->bk = B |
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321 | |||
322 | ; p->head = psize|PINUSE_BIT; |
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323 | |||
324 | mov ecx, esi |
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325 | mov [ebx+8], edx |
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326 | or ecx, 1 |
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327 | mov [edi+4], ecx |
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328 | |||
329 | ; (p+psize)->prev_foot = psize; |
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330 | |||
331 | mov [esi+edi], esi |
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332 | |||
333 | ; insert_chunk(p,psize); |
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334 | |||
335 | mov eax, esi |
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336 | pop esi |
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337 | mov ecx, edi |
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338 | pop edi |
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339 | jmp insert_chunk |
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340 | .unl_large: |
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341 | |||
342 | ; unlink_large_chunk((tchunkptr)next); |
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343 | |||
344 | mov edx, ebx |
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345 | call unlink_large_chunk |
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346 | ; p->head = psize|PINUSE_BIT; |
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347 | |||
348 | mov ecx, esi |
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349 | or ecx, 1 |
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350 | mov [edi+4], ecx |
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351 | |||
352 | ; (p+psize)->prev_foot = psize; |
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353 | |||
354 | mov [esi+edi], esi |
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355 | |||
356 | ; insert_chunk(p,psize); |
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357 | |||
358 | mov eax, esi |
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359 | pop esi |
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360 | mov ecx, edi |
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361 | pop edi |
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362 | jmp insert_chunk |
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363 | .fix_next: |
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364 | |||
365 | ; (p+psize)->prev_foot = psize; |
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366 | ; next->head &= ~PINUSE_BIT; |
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367 | ; p->head = psize|PINUSE_BIT; |
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368 | |||
369 | and eax, -2 |
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370 | mov edx, esi |
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371 | mov [ebx+4], eax |
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372 | or edx, 1 |
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373 | mov [edi+4], edx |
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374 | |||
375 | ; (p+psize)->prev_foot = psize; |
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376 | |||
377 | mov [esi+edi], esi |
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378 | ; insert_chunk(p,psize); |
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379 | |||
380 | mov eax, esi |
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381 | pop esi |
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382 | mov ecx, edi |
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383 | pop edi |
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384 | jmp insert_chunk |
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385 | |||
386 | ; param |
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387 | ; ecx = chunk |
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388 | ; eax = size |
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389 | |||
390 | insert_chunk: |
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391 | |||
392 | cmp eax, 256 |
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393 | push esi |
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394 | mov esi, ecx |
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395 | jae .large |
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396 | |||
397 | ; I = S>>3; |
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398 | ; ms.smallmap |= 1<< I; |
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399 | |||
400 | shr eax, 3 |
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401 | bts [mst.smallmap], eax |
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402 | |||
403 | ; B = &ms.smallbins[I]; |
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404 | |||
405 | shl eax, 4 |
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406 | add eax, mst.smallbins |
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407 | mov edx, [eax+8] ;F = B->fd |
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408 | mov [eax+8], esi ;B->fd = P |
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409 | mov [edx+12], esi ;F->bk = P |
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410 | mov [esi+8], edx ;P->fd = F |
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411 | mov [esi+12], eax ;P->bk = B |
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412 | pop esi |
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413 | and [mst.mutex], 0 |
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414 | ret |
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415 | .large: |
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416 | mov ebx, eax |
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417 | call insert_large_chunk |
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418 | pop esi |
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419 | and [mst.mutex], 0 |
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420 | ret |
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421 | |||
422 | |||
423 | ; param |
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424 | ; esi= chunk |
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425 | ; ebx= size |
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426 | |||
427 | insert_large_chunk: |
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428 | |||
429 | ; I = compute_tree_index(S); |
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430 | |||
431 | mov edx, ebx |
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432 | shr edx, 8 |
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433 | bsr eax, edx |
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434 | lea ecx, [eax+7] |
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435 | mov edx, ebx |
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436 | shr edx, cl |
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437 | and edx, 1 |
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438 | lea ecx, [edx+eax*2] |
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439 | |||
440 | ; X->index = I; |
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441 | mov dword [esi+28], ecx |
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442 | |||
443 | ; X->child[0] = X->child[1] = 0; |
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444 | and dword [esi+20], 0 |
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445 | and dword [esi+16], 0 |
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446 | |||
447 | ; H = &ms.treebins[I]; |
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448 | |||
449 | mov eax, ecx |
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450 | lea edx, [mst.treebins+eax*4] |
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451 | |||
452 | ; if (!(ms.treemap & 1< |
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453 | bt [mst.treemap], ecx |
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454 | jc .tree |
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455 | |||
456 | ; ms.treemap |= 1< |
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457 | bts [mst.treemap], ecx |
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458 | ; *H = X; |
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459 | mov dword [edx], esi |
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460 | jmp .done |
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461 | .tree: |
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462 | |||
463 | ; T = *H; |
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464 | mov edx, [edx] |
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465 | |||
466 | ; K = S << leftshift_for_tree_index(I); |
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467 | mov eax, ecx |
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468 | shr eax, 1 |
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469 | sub ecx, 31 |
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470 | mov edi, 37 |
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471 | sub edi, eax |
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472 | neg ecx |
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473 | sbb ecx, ecx |
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474 | and ecx, edi |
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475 | mov eax, ebx |
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476 | shl eax, cl ;eax= K |
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477 | |||
478 | jmp .loop |
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479 | .not_eq_size: |
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480 | |||
481 | ; C = &(T->child[(K >> 31) & 1]); |
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482 | mov ecx, eax |
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483 | shr ecx, 31 |
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484 | lea ecx, [edx+ecx*4+16] |
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485 | |||
486 | ; K <<= 1; |
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487 | ; if (*C != 0) |
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488 | mov edi, [ecx] |
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489 | add eax, eax |
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490 | test edi, edi |
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491 | jz .insert_child |
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492 | |||
493 | ; T = *C; |
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494 | mov edx, edi |
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495 | .loop: |
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496 | |||
497 | ; for (;;) |
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498 | ; if ((T->head & ~INUSE_BITS) != S) |
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499 | |||
500 | mov ecx, [edx+4] |
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501 | and ecx, not 3 |
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502 | cmp ecx, ebx |
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503 | jne .not_eq_size |
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504 | |||
505 | ; F = T->fd; |
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506 | mov eax, [edx+8] |
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507 | |||
508 | ; T->fd = F->bk = X; |
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509 | mov [eax+12], esi |
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510 | mov [edx+8], esi |
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511 | |||
512 | ; X->fd = F; |
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513 | ; X->bk = T; |
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514 | ; X->parent = 0; |
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515 | |||
516 | and dword [esi+24], 0 |
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517 | mov [esi+8], eax |
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518 | mov [esi+12], edx |
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519 | ret |
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520 | .insert_child: |
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521 | |||
522 | ; *C = X; |
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523 | mov [ecx], esi |
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524 | .done: |
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525 | |||
526 | ; X->parent = T; |
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527 | mov [esi+24], edx |
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528 | |||
529 | ; X->fd = X->bk = X; |
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530 | mov [esi+12], esi |
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531 | mov [esi+8], esi |
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532 | ret |
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533 | |||
534 | |||
535 | ; param |
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536 | ; edx= chunk |
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537 | |||
538 | unlink_large_chunk: |
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539 | |||
540 | mov eax, [edx+12] |
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541 | cmp eax, edx |
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542 | push edi |
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543 | mov edi, [edx+24] |
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544 | je @F |
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545 | |||
546 | mov ecx, [edx+8] ;F = X->fd |
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547 | mov [ecx+12], eax ;F->bk = R; |
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548 | mov [eax+8], ecx ;R->fd = F |
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549 | jmp .parent |
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550 | @@: |
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551 | mov eax, [edx+20] |
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552 | test eax, eax |
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553 | push esi |
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554 | lea esi, [edx+20] |
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555 | jne .loop |
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556 | |||
557 | mov eax, [edx+16] |
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558 | test eax, eax |
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559 | lea esi, [edx+16] |
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560 | je .l2 |
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561 | .loop: |
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562 | cmp dword [eax+20], 0 |
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563 | lea ecx, [eax+20] |
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564 | jne @F |
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565 | |||
566 | cmp dword [eax+16], 0 |
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567 | lea ecx, [eax+16] |
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568 | je .l1 |
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569 | @@: |
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570 | mov eax, [ecx] |
||
571 | mov esi, ecx |
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572 | jmp .loop |
||
573 | .l1: |
||
574 | mov dword [esi], 0 |
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575 | .l2: |
||
576 | pop esi |
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577 | .parent: |
||
578 | test edi, edi |
||
579 | je .done |
||
580 | |||
581 | mov ecx, [edx+28] |
||
582 | cmp edx, [mst.treebins+ecx*4] |
||
583 | lea ecx, [mst.treebins+ecx*4] |
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584 | jne .l3 |
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585 | |||
586 | test eax, eax |
||
587 | mov [ecx], eax |
||
588 | jne .l5 |
||
589 | |||
590 | mov ecx, [edx+28] |
||
591 | btr [mst.treemap], ecx |
||
592 | pop edi |
||
593 | ret |
||
1211 | Lrz | 594 | |
276 | serge | 595 | .l3: |
596 | cmp [edi+16], edx |
||
597 | jne @F |
||
598 | |||
599 | mov [edi+16], eax |
||
600 | jmp .l4 |
||
1211 | Lrz | 601 | |
276 | serge | 602 | @@: |
603 | mov [edi+20], eax |
||
1211 | Lrz | 604 | |
276 | serge | 605 | .l4: |
606 | test eax, eax |
||
607 | je .done |
||
1211 | Lrz | 608 | |
276 | serge | 609 | .l5: |
610 | mov [eax+24], edi |
||
611 | mov ecx, [edx+16] |
||
612 | test ecx, ecx |
||
613 | je .l6 |
||
614 | |||
615 | mov [eax+16], ecx |
||
616 | mov [ecx+24], eax |
||
1211 | Lrz | 617 | |
276 | serge | 618 | .l6: |
619 | mov edx, [edx+20] |
||
620 | test edx, edx |
||
621 | je .done |
||
622 | |||
623 | mov [eax+20], edx |
||
624 | mov [edx+24], eax |
||
1211 | Lrz | 625 | |
276 | serge | 626 | .done: |
627 | pop edi |
||
628 | ret |
||
629 | |||
630 | ; param |
||
631 | ; esi= nb |
||
632 | |||
633 | malloc_small: |
||
634 | push ebp |
||
635 | mov ebp, esi |
||
636 | |||
637 | push edi |
||
638 | |||
639 | bsf eax,[mst.treemap] |
||
640 | mov ecx, [mst.treebins+eax*4] |
||
641 | |||
642 | ; rsize = (t->head & ~INUSE_BITS) - nb; |
||
643 | |||
644 | mov edi, [ecx+4] |
||
645 | and edi, -4 |
||
646 | sub edi, esi |
||
1211 | Lrz | 647 | |
276 | serge | 648 | .loop: |
649 | mov ebx, ecx |
||
1211 | Lrz | 650 | |
276 | serge | 651 | .loop_1: |
652 | |||
653 | ; while ((t = leftmost_child(t)) != 0) |
||
654 | |||
655 | mov eax, [ecx+16] |
||
656 | test eax, eax |
||
657 | jz @F |
||
658 | mov ecx, eax |
||
659 | jmp .l1 |
||
1211 | Lrz | 660 | |
276 | serge | 661 | @@: |
662 | mov ecx, [ecx+20] |
||
1211 | Lrz | 663 | |
276 | serge | 664 | .l1: |
665 | test ecx, ecx |
||
666 | jz .unlink |
||
667 | |||
668 | ; trem = (t->head & ~INUSE_BITS) - nb; |
||
669 | |||
670 | mov eax, [ecx+4] |
||
671 | and eax, -4 |
||
672 | sub eax, ebp |
||
673 | |||
674 | ; if (trem < rsize) |
||
675 | |||
676 | cmp eax, edi |
||
677 | jae .loop_1 |
||
678 | |||
679 | ; rsize = trem; |
||
680 | |||
681 | mov edi, eax |
||
682 | jmp .loop |
||
683 | .unlink: |
||
684 | |||
685 | |||
686 | ; r = chunk_plus_offset((mchunkptr)v, nb); |
||
687 | ; unlink_large_chunk(v); |
||
688 | |||
689 | mov edx, ebx |
||
690 | lea esi, [ebx+ebp] |
||
691 | call unlink_large_chunk |
||
692 | |||
693 | ; if (rsize < 16) |
||
694 | |||
695 | cmp edi, 16 |
||
696 | jae .split |
||
697 | |||
698 | ; v->head = (rsize + nb)|PINUSE_BIT|CINUSE_BIT; |
||
699 | |||
700 | lea ecx, [edi+ebp] |
||
701 | |||
702 | ; (v+rsize + nb)->head |= PINUSE_BIT; |
||
703 | |||
704 | add edi, ebx |
||
705 | lea eax, [edi+ebp+4] |
||
706 | pop edi |
||
707 | or ecx, 3 |
||
708 | mov [ebx+4], ecx |
||
709 | or dword [eax], 1 |
||
710 | pop ebp |
||
711 | |||
712 | lea eax, [ebx+8] |
||
713 | ret |
||
1211 | Lrz | 714 | |
276 | serge | 715 | .split: |
716 | |||
717 | ; v->head = nb|PINUSE_BIT|CINUSE_BIT; |
||
718 | ; r->head = rsize|PINUSE_BIT; |
||
719 | ; (r+rsize)->prev_foot = rsize; |
||
720 | |||
721 | or ebp, 3 |
||
722 | mov edx, edi |
||
723 | or edx, 1 |
||
724 | |||
725 | cmp edi, 256 |
||
726 | mov [ebx+4], ebp |
||
727 | mov [esi+4], edx |
||
728 | mov [esi+edi], edi |
||
729 | jae .large |
||
730 | |||
731 | shr edi, 3 |
||
732 | bts [mst.smallmap], edi |
||
733 | |||
734 | mov eax, edi |
||
735 | shl eax, 4 |
||
736 | add eax, mst.smallbins |
||
737 | |||
738 | mov edx, [eax+8] |
||
739 | mov [eax+8], esi |
||
740 | mov [edx+12], esi |
||
741 | pop edi |
||
742 | mov [esi+12], eax |
||
743 | mov [esi+8], edx |
||
744 | pop ebp |
||
745 | lea eax, [ebx+8] |
||
746 | ret |
||
1211 | Lrz | 747 | |
276 | serge | 748 | .large: |
749 | lea eax, [ebx+8] |
||
750 | push eax |
||
751 | mov ebx, edi |
||
752 | call insert_large_chunk |
||
753 | pop eax |
||
754 | pop edi |
||
755 | pop ebp |
||
756 | ret |
||
757 | |||
758 | |||
759 | ; param |
||
760 | ; esi= nb |
||
761 | |||
762 | malloc_large: |
||
763 | .idx equ esp+4 |
||
764 | .rst equ esp |
||
765 | |||
766 | push ebp |
||
1333 | diamond | 767 | push esi |
276 | serge | 768 | push edi |
769 | sub esp, 8 |
||
770 | ; v = 0; |
||
771 | ; rsize = -nb; |
||
772 | |||
773 | mov edi, esi |
||
774 | mov ebx, esi |
||
775 | xor ebp, ebp |
||
776 | neg edi |
||
777 | |||
778 | ; idx = compute_tree_index(nb); |
||
779 | |||
780 | mov edx, esi |
||
781 | shr edx, 8 |
||
782 | bsr eax, edx |
||
783 | lea ecx, [eax+7] |
||
784 | shr esi, cl |
||
785 | and esi, 1 |
||
786 | lea ecx, [esi+eax*2] |
||
787 | mov [.idx], ecx |
||
788 | |||
789 | ; if ((t = ms.treebins[idx]) != 0) |
||
790 | |||
791 | mov eax, [mst.treebins+ecx*4] |
||
792 | test eax, eax |
||
793 | jz .l3 |
||
794 | |||
795 | ; sizebits = nb << leftshift_for_tree_index(idx); |
||
796 | |||
797 | cmp ecx, 31 |
||
798 | jne @F |
||
799 | xor ecx, ecx |
||
800 | jmp .l1 |
||
1211 | Lrz | 801 | |
276 | serge | 802 | @@: |
803 | mov edx, ecx |
||
804 | shr edx, 1 |
||
805 | mov ecx, 37 |
||
806 | sub ecx, edx |
||
1211 | Lrz | 807 | |
276 | serge | 808 | .l1: |
809 | mov edx, ebx |
||
810 | shl edx, cl |
||
811 | |||
812 | ; rst = 0; |
||
813 | mov [.rst], ebp |
||
1211 | Lrz | 814 | |
276 | serge | 815 | .loop: |
816 | |||
817 | ; trem = (t->head & ~INUSE_BITS) - nb; |
||
818 | |||
819 | mov ecx, [eax+4] |
||
820 | and ecx, -4 |
||
821 | sub ecx, ebx |
||
822 | |||
823 | ; if (trem < rsize) |
||
824 | |||
825 | cmp ecx, edi |
||
826 | jae @F |
||
827 | ; v = t; |
||
828 | ; if ((rsize = trem) == 0) |
||
829 | |||
830 | test ecx, ecx |
||
831 | mov ebp, eax |
||
832 | mov edi, ecx |
||
833 | je .l2 |
||
1211 | Lrz | 834 | |
276 | serge | 835 | @@: |
836 | |||
837 | ; rt = t->child[1]; |
||
838 | |||
839 | mov ecx, [eax+20] |
||
840 | |||
841 | ; t = t->child[(sizebits >> 31) & 1]; |
||
842 | |||
843 | mov esi, edx |
||
844 | shr esi, 31 |
||
845 | |||
846 | ; if (rt != 0 && rt != t) |
||
847 | |||
848 | test ecx, ecx |
||
849 | mov eax, [eax+esi*4+16] |
||
850 | jz @F |
||
851 | cmp ecx, eax |
||
852 | jz @F |
||
853 | |||
854 | ; rst = rt; |
||
855 | mov [.rst], ecx |
||
1211 | Lrz | 856 | |
276 | serge | 857 | @@: |
858 | ; if (t == 0) |
||
859 | |||
860 | test eax, eax |
||
861 | jz @F |
||
862 | |||
863 | ; sizebits <<= 1; |
||
864 | |||
865 | add edx, edx |
||
866 | jmp .loop |
||
1211 | Lrz | 867 | |
276 | serge | 868 | @@: |
869 | ; t = rst; |
||
870 | mov eax, [.rst] |
||
1211 | Lrz | 871 | |
276 | serge | 872 | .l2: |
873 | ; if (t == 0 && v == 0) |
||
874 | |||
875 | test eax, eax |
||
876 | jne .l4 |
||
877 | test ebp, ebp |
||
878 | jne .l7 |
||
879 | mov ecx, [.idx] |
||
1211 | Lrz | 880 | |
276 | serge | 881 | .l3: |
882 | |||
883 | ; leftbits = (-1< |
||
884 | ; if (leftbits != 0) |
||
885 | |||
886 | or edx, -1 |
||
887 | shl edx, cl |
||
888 | and edx, [mst.treemap] |
||
889 | jz @F |
||
890 | |||
891 | bsf eax, edx |
||
892 | ; t = ms.treebins[i]; |
||
893 | mov eax, [mst.treebins+eax*4] |
||
1211 | Lrz | 894 | |
276 | serge | 895 | @@: |
896 | |||
897 | ; while (t != 0) |
||
898 | test eax, eax |
||
899 | jz .l5 |
||
1211 | Lrz | 900 | |
276 | serge | 901 | .l4: |
902 | |||
903 | ; trem = (t->head & ~INUSE_BITS) - nb; |
||
904 | |||
905 | mov ecx, [eax+4] |
||
906 | and ecx, -4 |
||
907 | sub ecx, ebx |
||
908 | |||
909 | ; if (trem < rsize) |
||
910 | |||
911 | cmp ecx, edi |
||
912 | jae @F |
||
913 | ; rsize = trem; |
||
914 | |||
915 | mov edi, ecx |
||
916 | ; v = t; |
||
917 | mov ebp, eax |
||
1211 | Lrz | 918 | |
276 | serge | 919 | @@: |
920 | |||
921 | ; t = leftmost_child(t); |
||
922 | |||
923 | mov ecx, [eax+16] |
||
924 | test ecx, ecx |
||
925 | je @F |
||
926 | mov eax, ecx |
||
927 | jmp .l6 |
||
1211 | Lrz | 928 | |
276 | serge | 929 | @@: |
930 | mov eax, [eax+20] |
||
1211 | Lrz | 931 | |
276 | serge | 932 | .l6: |
933 | |||
934 | ; while (t != 0) |
||
935 | |||
936 | test eax, eax |
||
937 | jne .l4 |
||
1211 | Lrz | 938 | |
276 | serge | 939 | .l5: |
940 | |||
941 | ; if (v != 0) |
||
942 | |||
943 | test ebp, ebp |
||
944 | jz .done |
||
1211 | Lrz | 945 | |
276 | serge | 946 | .l7: |
947 | |||
948 | ; r = chunk_plus_offset((mchunkptr)v, nb); |
||
949 | ; unlink_large_chunk(v); |
||
950 | |||
951 | mov edx, ebp |
||
952 | lea esi, [ebx+ebp] |
||
953 | call unlink_large_chunk |
||
954 | |||
326 | serge | 955 | ; if (rsize < 16) |
276 | serge | 956 | |
326 | serge | 957 | cmp edi, 16 |
276 | serge | 958 | jae .large |
959 | |||
960 | ; v->head = (rsize + nb)|PINUSE_BIT|CINUSE_BIT; |
||
961 | |||
962 | lea ecx, [edi+ebx] |
||
963 | |||
964 | ; (v+rsize + nb)->head |= PINUSE_BIT; |
||
965 | |||
966 | add edi, ebp |
||
967 | lea eax, [edi+ebx+4] |
||
968 | or ecx, 3 |
||
969 | mov [ebp+4], ecx |
||
970 | or dword [eax], 1 |
||
971 | lea eax, [ebp+8] |
||
972 | add esp, 8 |
||
973 | pop edi |
||
1333 | diamond | 974 | pop esi |
276 | serge | 975 | pop ebp |
976 | ret |
||
1211 | Lrz | 977 | |
276 | serge | 978 | .large: |
979 | |||
980 | ; v->head = nb|PINUSE_BIT|CINUSE_BIT; |
||
981 | ; r->head = rsize|PINUSE_BIT; |
||
982 | |||
983 | mov edx, edi |
||
984 | or ebx, 3 |
||
985 | mov [ebp+4], ebx |
||
986 | or edx, 1 |
||
987 | mov [esi+4], edx |
||
988 | |||
989 | ; (r+rsize)->prev_foot = rsize; |
||
990 | ; insert_large_chunk((tchunkptr)r, rsize); |
||
991 | |||
992 | mov [esi+edi], edi |
||
326 | serge | 993 | mov eax, edi |
994 | mov ecx, esi |
||
995 | call insert_chunk |
||
276 | serge | 996 | |
997 | lea eax, [ebp+8] |
||
998 | add esp, 8 |
||
999 | pop edi |
||
1333 | diamond | 1000 | pop esi |
276 | serge | 1001 | pop ebp |
1002 | ret |
||
1211 | Lrz | 1003 | |
276 | serge | 1004 | .done: |
1005 | add esp, 8 |
||
1006 | pop edi |
||
1333 | diamond | 1007 | pop esi |
276 | serge | 1008 | pop ebp |
1009 | xor eax, eax |
||
1010 | ret |
||
1011 | |||
1012 | init_malloc: |
||
1013 | |||
753 | serge | 1014 | stdcall kernel_alloc, 0x40000 |
276 | serge | 1015 | |
1016 | mov [mst.top], eax |
||
1017 | mov [mst.topsize], 128*1024 |
||
1018 | mov dword [eax+4], (128*1024) or 1 |
||
1019 | mov eax, mst.smallbins |
||
1211 | Lrz | 1020 | |
276 | serge | 1021 | @@: |
1022 | mov [eax+8], eax |
||
1023 | mov [eax+12], eax |
||
1024 | add eax, 16 |
||
1025 | cmp eax, mst.smallbins+512 |
||
465 | serge | 1026 | jb @B |
276 | serge | 1027 | |
1028 | ret>> |
||
1029 |