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Rev | Author | Line No. | Line |
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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: 1211 $ |
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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138 | ret |
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139 | .small: |
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140 | |||
141 | ; if (ms.treemap != 0 && (mem = malloc_small(nb)) != 0) |
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1210 | Lrz | 142 | ;;;;;;;;;;; start a change |
143 | mov eax,[mst.treemap] |
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144 | test eax,eax |
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145 | ;;;;;;;;;;; end the change |
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146 | ; cmp [mst.treemap], 0 |
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147 | jz .from_top |
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276 | serge | 148 | mov eax, esi |
149 | call malloc_small |
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150 | test eax, eax |
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151 | jz .from_top |
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152 | pop esi |
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153 | and [mst.mutex], 0 |
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154 | ret |
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155 | .large: |
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156 | |||
157 | ; if (ms.treemap != 0 && (mem = malloc_large(nb)) != 0) |
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158 | |||
159 | cmp [mst.treemap], 0 |
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160 | je .from_top |
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161 | |||
162 | call malloc_large ;esi= nb |
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163 | test eax, eax |
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164 | jne .done |
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165 | .from_top: |
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166 | |||
167 | ; if (nb < ms.topsize) |
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168 | |||
169 | mov eax, [mst.topsize] |
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170 | cmp esi, eax |
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171 | jae .fail |
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172 | |||
173 | ; rsize = ms.topsize -= nb; |
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174 | ; p = ms.top; |
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175 | |||
176 | mov ecx, [mst.top] |
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177 | sub eax, esi |
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178 | mov [mst.topsize], eax |
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179 | |||
180 | ; r = ms.top = chunk_plus_offset(p, nb); |
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181 | ; r->head = rsize | PINUSE_BIT; |
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182 | ; p->head = nb |PINUSE_BIT|CINUSE_BIT; |
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183 | |||
184 | lea edx, [ecx+esi] |
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185 | or eax, 1 |
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186 | mov [mst.top], edx |
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187 | or esi, 3 |
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188 | mov [edx+4], eax |
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189 | mov [ecx+4], esi |
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190 | lea eax, [ecx+8] |
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191 | pop esi |
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192 | and [mst.mutex], 0 |
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193 | ret |
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194 | .fail: |
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195 | xor eax, eax |
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196 | pop esi |
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197 | and [mst.mutex], 0 |
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198 | ret |
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199 | |||
200 | ; param |
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201 | ; eax= mem |
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202 | |||
203 | free: |
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204 | push edi |
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205 | mov edi, eax |
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206 | add edi, -8 |
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207 | |||
208 | ; if(p->head & CINUSE_BIT) |
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209 | |||
210 | test byte [edi+4], 2 |
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211 | je .fail |
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212 | |||
213 | mov ebx, mst.mutex |
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214 | call wait_mutex ;ebx |
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215 | |||
216 | ; psize = p->head & (~3); |
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217 | |||
218 | mov eax, [edi+4] |
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219 | push esi |
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220 | mov esi, eax |
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221 | and esi, -4 |
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222 | |||
223 | ; next = chunk_plus_offset(p, psize); |
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224 | ; if(!(p->head & PINUSE_BIT)) |
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225 | |||
226 | test al, 1 |
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227 | lea ebx, [esi+edi] |
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228 | jne .next |
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229 | |||
230 | ; prevsize = p->prev_foot; |
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231 | ; prev=p - prevsize; |
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232 | ; psize += prevsize; |
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233 | ; p = prev; |
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234 | |||
235 | mov ecx, [edi] ;ecx= prevsize |
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236 | add esi, ecx ;esi= psize |
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237 | sub edi, ecx ;edi= p |
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238 | |||
239 | ; if (prevsize < 256) |
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240 | |||
241 | cmp ecx, 256 |
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242 | jae .unlink_large |
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243 | |||
244 | mov eax, [edi+8] ;F = p->fd; |
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245 | mov edx, [edi+12] ;B = p->bk; |
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246 | |||
247 | ; if (F == B) |
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248 | ; ms.smallmap &= ~(1<< I); |
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249 | shr ecx, 3 |
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250 | cmp eax, edx |
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251 | jne @F |
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252 | and [mst.smallmap], ecx |
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253 | @@: |
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254 | mov [eax+12], edx ;F->bk = B; |
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255 | mov [edx+8], eax ;B->fd = F |
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256 | jmp .next |
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257 | .unlink_large: |
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258 | mov edx, edi |
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259 | call unlink_large_chunk |
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260 | .next: |
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261 | |||
262 | ; if(next->head & PINUSE_BIT) |
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263 | |||
264 | mov eax, [ebx+4] |
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265 | test al, 1 |
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266 | jz .fail2 |
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267 | |||
268 | ; if (! (next->head & CINUSE_BIT)) |
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269 | |||
270 | test al, 2 |
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271 | jnz .fix_next |
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272 | |||
273 | ; if (next == ms.top) |
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274 | |||
275 | cmp ebx, [mst.top] |
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276 | jne @F |
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277 | |||
278 | ; tsize = ms.topsize += psize; |
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279 | |||
280 | mov eax, [mst.topsize] |
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281 | add eax, esi |
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282 | mov [mst.topsize], eax |
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283 | |||
284 | ; ms.top = p; |
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285 | ; p->head = tsize | PINUSE_BIT; |
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286 | |||
287 | or eax, 1 |
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288 | mov [mst.top], edi |
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289 | mov [edi+4], eax |
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290 | .fail2: |
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291 | and [mst.mutex], 0 |
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292 | pop esi |
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293 | .fail: |
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294 | pop edi |
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295 | ret |
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296 | @@: |
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297 | |||
298 | ; nsize = next->head & ~INUSE_BITS; |
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299 | |||
300 | and eax, -4 |
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301 | add esi, eax ;psize += nsize; |
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302 | |||
303 | ; if (nsize < 256) |
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304 | |||
305 | cmp eax, 256 |
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306 | jae .unl_large |
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307 | |||
308 | mov edx, [ebx+8] ;F = next->fd |
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309 | mov ebx, [ebx+12] ;B = next->bk |
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310 | |||
311 | ; if (F == B) |
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312 | |||
313 | cmp edx, ebx |
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314 | jne @F |
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315 | mov ecx, eax |
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316 | shr ecx, 3 |
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317 | btr [mst.smallmap], ecx |
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318 | @@: |
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319 | mov [edx+12], ebx ;F->bk = B |
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320 | |||
321 | ; p->head = psize|PINUSE_BIT; |
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322 | |||
323 | mov ecx, esi |
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324 | mov [ebx+8], edx |
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325 | or ecx, 1 |
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326 | mov [edi+4], ecx |
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327 | |||
328 | ; (p+psize)->prev_foot = psize; |
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329 | |||
330 | mov [esi+edi], esi |
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331 | |||
332 | ; insert_chunk(p,psize); |
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333 | |||
334 | mov eax, esi |
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335 | pop esi |
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336 | mov ecx, edi |
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337 | pop edi |
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338 | jmp insert_chunk |
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339 | .unl_large: |
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340 | |||
341 | ; unlink_large_chunk((tchunkptr)next); |
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342 | |||
343 | mov edx, ebx |
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344 | call unlink_large_chunk |
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345 | ; p->head = psize|PINUSE_BIT; |
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346 | |||
347 | mov ecx, esi |
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348 | or ecx, 1 |
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349 | mov [edi+4], ecx |
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350 | |||
351 | ; (p+psize)->prev_foot = psize; |
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352 | |||
353 | mov [esi+edi], esi |
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354 | |||
355 | ; insert_chunk(p,psize); |
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356 | |||
357 | mov eax, esi |
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358 | pop esi |
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359 | mov ecx, edi |
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360 | pop edi |
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361 | jmp insert_chunk |
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362 | .fix_next: |
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363 | |||
364 | ; (p+psize)->prev_foot = psize; |
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365 | ; next->head &= ~PINUSE_BIT; |
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366 | ; p->head = psize|PINUSE_BIT; |
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367 | |||
368 | and eax, -2 |
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369 | mov edx, esi |
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370 | mov [ebx+4], eax |
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371 | or edx, 1 |
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372 | mov [edi+4], edx |
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373 | |||
374 | ; (p+psize)->prev_foot = psize; |
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375 | |||
376 | mov [esi+edi], esi |
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377 | ; insert_chunk(p,psize); |
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378 | |||
379 | mov eax, esi |
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380 | pop esi |
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381 | mov ecx, edi |
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382 | pop edi |
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383 | jmp insert_chunk |
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384 | |||
385 | ; param |
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386 | ; ecx = chunk |
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387 | ; eax = size |
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388 | |||
389 | insert_chunk: |
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390 | |||
391 | cmp eax, 256 |
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392 | push esi |
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393 | mov esi, ecx |
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394 | jae .large |
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395 | |||
396 | ; I = S>>3; |
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397 | ; ms.smallmap |= 1<< I; |
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398 | |||
399 | shr eax, 3 |
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400 | bts [mst.smallmap], eax |
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401 | |||
402 | ; B = &ms.smallbins[I]; |
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403 | |||
404 | shl eax, 4 |
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405 | add eax, mst.smallbins |
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406 | mov edx, [eax+8] ;F = B->fd |
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407 | mov [eax+8], esi ;B->fd = P |
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408 | mov [edx+12], esi ;F->bk = P |
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409 | mov [esi+8], edx ;P->fd = F |
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410 | mov [esi+12], eax ;P->bk = B |
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411 | pop esi |
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412 | and [mst.mutex], 0 |
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413 | ret |
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414 | .large: |
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415 | mov ebx, eax |
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416 | call insert_large_chunk |
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417 | pop esi |
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418 | and [mst.mutex], 0 |
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419 | ret |
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420 | |||
421 | |||
422 | ; param |
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423 | ; esi= chunk |
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424 | ; ebx= size |
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425 | |||
426 | insert_large_chunk: |
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427 | |||
428 | ; I = compute_tree_index(S); |
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429 | |||
430 | mov edx, ebx |
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431 | shr edx, 8 |
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432 | bsr eax, edx |
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433 | lea ecx, [eax+7] |
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434 | mov edx, ebx |
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435 | shr edx, cl |
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436 | and edx, 1 |
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437 | lea ecx, [edx+eax*2] |
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438 | |||
439 | ; X->index = I; |
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440 | mov dword [esi+28], ecx |
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441 | |||
442 | ; X->child[0] = X->child[1] = 0; |
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443 | and dword [esi+20], 0 |
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444 | and dword [esi+16], 0 |
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445 | |||
446 | ; H = &ms.treebins[I]; |
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447 | |||
448 | mov eax, ecx |
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449 | lea edx, [mst.treebins+eax*4] |
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450 | |||
451 | ; if (!(ms.treemap & 1< |
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452 | bt [mst.treemap], ecx |
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453 | jc .tree |
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454 | |||
455 | ; ms.treemap |= 1< |
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456 | bts [mst.treemap], ecx |
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457 | ; *H = X; |
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458 | mov dword [edx], esi |
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459 | jmp .done |
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460 | .tree: |
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461 | |||
462 | ; T = *H; |
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463 | mov edx, [edx] |
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464 | |||
465 | ; K = S << leftshift_for_tree_index(I); |
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466 | mov eax, ecx |
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467 | shr eax, 1 |
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468 | sub ecx, 31 |
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469 | mov edi, 37 |
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470 | sub edi, eax |
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471 | neg ecx |
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472 | sbb ecx, ecx |
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473 | and ecx, edi |
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474 | mov eax, ebx |
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475 | shl eax, cl ;eax= K |
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476 | |||
477 | jmp .loop |
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478 | .not_eq_size: |
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479 | |||
480 | ; C = &(T->child[(K >> 31) & 1]); |
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481 | mov ecx, eax |
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482 | shr ecx, 31 |
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483 | lea ecx, [edx+ecx*4+16] |
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484 | |||
485 | ; K <<= 1; |
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486 | ; if (*C != 0) |
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487 | mov edi, [ecx] |
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488 | add eax, eax |
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489 | test edi, edi |
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490 | jz .insert_child |
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491 | |||
492 | ; T = *C; |
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493 | mov edx, edi |
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494 | .loop: |
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495 | |||
496 | ; for (;;) |
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497 | ; if ((T->head & ~INUSE_BITS) != S) |
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498 | |||
499 | mov ecx, [edx+4] |
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500 | and ecx, not 3 |
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501 | cmp ecx, ebx |
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502 | jne .not_eq_size |
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503 | |||
504 | ; F = T->fd; |
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505 | mov eax, [edx+8] |
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506 | |||
507 | ; T->fd = F->bk = X; |
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508 | mov [eax+12], esi |
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509 | mov [edx+8], esi |
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510 | |||
511 | ; X->fd = F; |
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512 | ; X->bk = T; |
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513 | ; X->parent = 0; |
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514 | |||
515 | and dword [esi+24], 0 |
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516 | mov [esi+8], eax |
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517 | mov [esi+12], edx |
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518 | ret |
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519 | .insert_child: |
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520 | |||
521 | ; *C = X; |
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522 | mov [ecx], esi |
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523 | .done: |
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524 | |||
525 | ; X->parent = T; |
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526 | mov [esi+24], edx |
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527 | |||
528 | ; X->fd = X->bk = X; |
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529 | mov [esi+12], esi |
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530 | mov [esi+8], esi |
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531 | ret |
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532 | |||
533 | |||
534 | ; param |
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535 | ; edx= chunk |
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536 | |||
537 | unlink_large_chunk: |
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538 | |||
539 | mov eax, [edx+12] |
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540 | cmp eax, edx |
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541 | push edi |
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542 | mov edi, [edx+24] |
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543 | je @F |
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544 | |||
545 | mov ecx, [edx+8] ;F = X->fd |
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546 | mov [ecx+12], eax ;F->bk = R; |
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547 | mov [eax+8], ecx ;R->fd = F |
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548 | jmp .parent |
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549 | @@: |
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550 | mov eax, [edx+20] |
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551 | test eax, eax |
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552 | push esi |
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553 | lea esi, [edx+20] |
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554 | jne .loop |
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555 | |||
556 | mov eax, [edx+16] |
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557 | test eax, eax |
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558 | lea esi, [edx+16] |
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559 | je .l2 |
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560 | .loop: |
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561 | cmp dword [eax+20], 0 |
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562 | lea ecx, [eax+20] |
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563 | jne @F |
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564 | |||
565 | cmp dword [eax+16], 0 |
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566 | lea ecx, [eax+16] |
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567 | je .l1 |
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568 | @@: |
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569 | mov eax, [ecx] |
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570 | mov esi, ecx |
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571 | jmp .loop |
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572 | .l1: |
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573 | mov dword [esi], 0 |
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574 | .l2: |
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575 | pop esi |
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576 | .parent: |
||
577 | test edi, edi |
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578 | je .done |
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579 | |||
580 | mov ecx, [edx+28] |
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581 | cmp edx, [mst.treebins+ecx*4] |
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582 | lea ecx, [mst.treebins+ecx*4] |
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583 | jne .l3 |
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584 | |||
585 | test eax, eax |
||
586 | mov [ecx], eax |
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587 | jne .l5 |
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588 | |||
589 | mov ecx, [edx+28] |
||
590 | btr [mst.treemap], ecx |
||
591 | pop edi |
||
592 | ret |
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1211 | Lrz | 593 | |
276 | serge | 594 | .l3: |
595 | cmp [edi+16], edx |
||
596 | jne @F |
||
597 | |||
598 | mov [edi+16], eax |
||
599 | jmp .l4 |
||
1211 | Lrz | 600 | |
276 | serge | 601 | @@: |
602 | mov [edi+20], eax |
||
1211 | Lrz | 603 | |
276 | serge | 604 | .l4: |
605 | test eax, eax |
||
606 | je .done |
||
1211 | Lrz | 607 | |
276 | serge | 608 | .l5: |
609 | mov [eax+24], edi |
||
610 | mov ecx, [edx+16] |
||
611 | test ecx, ecx |
||
612 | je .l6 |
||
613 | |||
614 | mov [eax+16], ecx |
||
615 | mov [ecx+24], eax |
||
1211 | Lrz | 616 | |
276 | serge | 617 | .l6: |
618 | mov edx, [edx+20] |
||
619 | test edx, edx |
||
620 | je .done |
||
621 | |||
622 | mov [eax+20], edx |
||
623 | mov [edx+24], eax |
||
1211 | Lrz | 624 | |
276 | serge | 625 | .done: |
626 | pop edi |
||
627 | ret |
||
628 | |||
629 | ; param |
||
630 | ; esi= nb |
||
631 | |||
632 | malloc_small: |
||
633 | push ebp |
||
634 | mov ebp, esi |
||
635 | |||
636 | push edi |
||
637 | |||
638 | bsf eax,[mst.treemap] |
||
639 | mov ecx, [mst.treebins+eax*4] |
||
640 | |||
641 | ; rsize = (t->head & ~INUSE_BITS) - nb; |
||
642 | |||
643 | mov edi, [ecx+4] |
||
644 | and edi, -4 |
||
645 | sub edi, esi |
||
1211 | Lrz | 646 | |
276 | serge | 647 | .loop: |
648 | mov ebx, ecx |
||
1211 | Lrz | 649 | |
276 | serge | 650 | .loop_1: |
651 | |||
652 | ; while ((t = leftmost_child(t)) != 0) |
||
653 | |||
654 | mov eax, [ecx+16] |
||
655 | test eax, eax |
||
656 | jz @F |
||
657 | mov ecx, eax |
||
658 | jmp .l1 |
||
1211 | Lrz | 659 | |
276 | serge | 660 | @@: |
661 | mov ecx, [ecx+20] |
||
1211 | Lrz | 662 | |
276 | serge | 663 | .l1: |
664 | test ecx, ecx |
||
665 | jz .unlink |
||
666 | |||
667 | ; trem = (t->head & ~INUSE_BITS) - nb; |
||
668 | |||
669 | mov eax, [ecx+4] |
||
670 | and eax, -4 |
||
671 | sub eax, ebp |
||
672 | |||
673 | ; if (trem < rsize) |
||
674 | |||
675 | cmp eax, edi |
||
676 | jae .loop_1 |
||
677 | |||
678 | ; rsize = trem; |
||
679 | |||
680 | mov edi, eax |
||
681 | jmp .loop |
||
682 | .unlink: |
||
683 | |||
684 | |||
685 | ; r = chunk_plus_offset((mchunkptr)v, nb); |
||
686 | ; unlink_large_chunk(v); |
||
687 | |||
688 | mov edx, ebx |
||
689 | lea esi, [ebx+ebp] |
||
690 | call unlink_large_chunk |
||
691 | |||
692 | ; if (rsize < 16) |
||
693 | |||
694 | cmp edi, 16 |
||
695 | jae .split |
||
696 | |||
697 | ; v->head = (rsize + nb)|PINUSE_BIT|CINUSE_BIT; |
||
698 | |||
699 | lea ecx, [edi+ebp] |
||
700 | |||
701 | ; (v+rsize + nb)->head |= PINUSE_BIT; |
||
702 | |||
703 | add edi, ebx |
||
704 | lea eax, [edi+ebp+4] |
||
705 | pop edi |
||
706 | or ecx, 3 |
||
707 | mov [ebx+4], ecx |
||
708 | or dword [eax], 1 |
||
709 | pop ebp |
||
710 | |||
711 | lea eax, [ebx+8] |
||
712 | ret |
||
1211 | Lrz | 713 | |
276 | serge | 714 | .split: |
715 | |||
716 | ; v->head = nb|PINUSE_BIT|CINUSE_BIT; |
||
717 | ; r->head = rsize|PINUSE_BIT; |
||
718 | ; (r+rsize)->prev_foot = rsize; |
||
719 | |||
720 | or ebp, 3 |
||
721 | mov edx, edi |
||
722 | or edx, 1 |
||
723 | |||
724 | cmp edi, 256 |
||
725 | mov [ebx+4], ebp |
||
726 | mov [esi+4], edx |
||
727 | mov [esi+edi], edi |
||
728 | jae .large |
||
729 | |||
730 | shr edi, 3 |
||
731 | bts [mst.smallmap], edi |
||
732 | |||
733 | mov eax, edi |
||
734 | shl eax, 4 |
||
735 | add eax, mst.smallbins |
||
736 | |||
737 | mov edx, [eax+8] |
||
738 | mov [eax+8], esi |
||
739 | mov [edx+12], esi |
||
740 | pop edi |
||
741 | mov [esi+12], eax |
||
742 | mov [esi+8], edx |
||
743 | pop ebp |
||
744 | lea eax, [ebx+8] |
||
745 | ret |
||
1211 | Lrz | 746 | |
276 | serge | 747 | .large: |
748 | lea eax, [ebx+8] |
||
749 | push eax |
||
750 | mov ebx, edi |
||
751 | call insert_large_chunk |
||
752 | pop eax |
||
753 | pop edi |
||
754 | pop ebp |
||
755 | ret |
||
756 | |||
757 | |||
758 | ; param |
||
759 | ; esi= nb |
||
760 | |||
761 | malloc_large: |
||
762 | .idx equ esp+4 |
||
763 | .rst equ esp |
||
764 | |||
765 | push ebp |
||
766 | push edi |
||
767 | sub esp, 8 |
||
768 | ; v = 0; |
||
769 | ; rsize = -nb; |
||
770 | |||
771 | mov edi, esi |
||
772 | mov ebx, esi |
||
773 | xor ebp, ebp |
||
774 | neg edi |
||
775 | |||
776 | ; idx = compute_tree_index(nb); |
||
777 | |||
778 | mov edx, esi |
||
779 | shr edx, 8 |
||
780 | bsr eax, edx |
||
781 | lea ecx, [eax+7] |
||
782 | shr esi, cl |
||
783 | and esi, 1 |
||
784 | lea ecx, [esi+eax*2] |
||
785 | mov [.idx], ecx |
||
786 | |||
787 | ; if ((t = ms.treebins[idx]) != 0) |
||
788 | |||
789 | mov eax, [mst.treebins+ecx*4] |
||
790 | test eax, eax |
||
791 | jz .l3 |
||
792 | |||
793 | ; sizebits = nb << leftshift_for_tree_index(idx); |
||
794 | |||
795 | cmp ecx, 31 |
||
796 | jne @F |
||
797 | xor ecx, ecx |
||
798 | jmp .l1 |
||
1211 | Lrz | 799 | |
276 | serge | 800 | @@: |
801 | mov edx, ecx |
||
802 | shr edx, 1 |
||
803 | mov ecx, 37 |
||
804 | sub ecx, edx |
||
1211 | Lrz | 805 | |
276 | serge | 806 | .l1: |
807 | mov edx, ebx |
||
808 | shl edx, cl |
||
809 | |||
810 | ; rst = 0; |
||
811 | mov [.rst], ebp |
||
1211 | Lrz | 812 | |
276 | serge | 813 | .loop: |
814 | |||
815 | ; trem = (t->head & ~INUSE_BITS) - nb; |
||
816 | |||
817 | mov ecx, [eax+4] |
||
818 | and ecx, -4 |
||
819 | sub ecx, ebx |
||
820 | |||
821 | ; if (trem < rsize) |
||
822 | |||
823 | cmp ecx, edi |
||
824 | jae @F |
||
825 | ; v = t; |
||
826 | ; if ((rsize = trem) == 0) |
||
827 | |||
828 | test ecx, ecx |
||
829 | mov ebp, eax |
||
830 | mov edi, ecx |
||
831 | je .l2 |
||
1211 | Lrz | 832 | |
276 | serge | 833 | @@: |
834 | |||
835 | ; rt = t->child[1]; |
||
836 | |||
837 | mov ecx, [eax+20] |
||
838 | |||
839 | ; t = t->child[(sizebits >> 31) & 1]; |
||
840 | |||
841 | mov esi, edx |
||
842 | shr esi, 31 |
||
843 | |||
844 | ; if (rt != 0 && rt != t) |
||
845 | |||
846 | test ecx, ecx |
||
847 | mov eax, [eax+esi*4+16] |
||
848 | jz @F |
||
849 | cmp ecx, eax |
||
850 | jz @F |
||
851 | |||
852 | ; rst = rt; |
||
853 | mov [.rst], ecx |
||
1211 | Lrz | 854 | |
276 | serge | 855 | @@: |
856 | ; if (t == 0) |
||
857 | |||
858 | test eax, eax |
||
859 | jz @F |
||
860 | |||
861 | ; sizebits <<= 1; |
||
862 | |||
863 | add edx, edx |
||
864 | jmp .loop |
||
1211 | Lrz | 865 | |
276 | serge | 866 | @@: |
867 | ; t = rst; |
||
868 | mov eax, [.rst] |
||
1211 | Lrz | 869 | |
276 | serge | 870 | .l2: |
871 | ; if (t == 0 && v == 0) |
||
872 | |||
873 | test eax, eax |
||
874 | jne .l4 |
||
875 | test ebp, ebp |
||
876 | jne .l7 |
||
877 | mov ecx, [.idx] |
||
1211 | Lrz | 878 | |
276 | serge | 879 | .l3: |
880 | |||
881 | ; leftbits = (-1< |
||
882 | ; if (leftbits != 0) |
||
883 | |||
884 | or edx, -1 |
||
885 | shl edx, cl |
||
886 | and edx, [mst.treemap] |
||
887 | jz @F |
||
888 | |||
889 | bsf eax, edx |
||
890 | ; t = ms.treebins[i]; |
||
891 | mov eax, [mst.treebins+eax*4] |
||
1211 | Lrz | 892 | |
276 | serge | 893 | @@: |
894 | |||
895 | ; while (t != 0) |
||
896 | test eax, eax |
||
897 | jz .l5 |
||
1211 | Lrz | 898 | |
276 | serge | 899 | .l4: |
900 | |||
901 | ; trem = (t->head & ~INUSE_BITS) - nb; |
||
902 | |||
903 | mov ecx, [eax+4] |
||
904 | and ecx, -4 |
||
905 | sub ecx, ebx |
||
906 | |||
907 | ; if (trem < rsize) |
||
908 | |||
909 | cmp ecx, edi |
||
910 | jae @F |
||
911 | ; rsize = trem; |
||
912 | |||
913 | mov edi, ecx |
||
914 | ; v = t; |
||
915 | mov ebp, eax |
||
1211 | Lrz | 916 | |
276 | serge | 917 | @@: |
918 | |||
919 | ; t = leftmost_child(t); |
||
920 | |||
921 | mov ecx, [eax+16] |
||
922 | test ecx, ecx |
||
923 | je @F |
||
924 | mov eax, ecx |
||
925 | jmp .l6 |
||
1211 | Lrz | 926 | |
276 | serge | 927 | @@: |
928 | mov eax, [eax+20] |
||
1211 | Lrz | 929 | |
276 | serge | 930 | .l6: |
931 | |||
932 | ; while (t != 0) |
||
933 | |||
934 | test eax, eax |
||
935 | jne .l4 |
||
1211 | Lrz | 936 | |
276 | serge | 937 | .l5: |
938 | |||
939 | ; if (v != 0) |
||
940 | |||
941 | test ebp, ebp |
||
942 | jz .done |
||
1211 | Lrz | 943 | |
276 | serge | 944 | .l7: |
945 | |||
946 | ; r = chunk_plus_offset((mchunkptr)v, nb); |
||
947 | ; unlink_large_chunk(v); |
||
948 | |||
949 | mov edx, ebp |
||
950 | lea esi, [ebx+ebp] |
||
951 | call unlink_large_chunk |
||
952 | |||
326 | serge | 953 | ; if (rsize < 16) |
276 | serge | 954 | |
326 | serge | 955 | cmp edi, 16 |
276 | serge | 956 | jae .large |
957 | |||
958 | ; v->head = (rsize + nb)|PINUSE_BIT|CINUSE_BIT; |
||
959 | |||
960 | lea ecx, [edi+ebx] |
||
961 | |||
962 | ; (v+rsize + nb)->head |= PINUSE_BIT; |
||
963 | |||
964 | add edi, ebp |
||
965 | lea eax, [edi+ebx+4] |
||
966 | or ecx, 3 |
||
967 | mov [ebp+4], ecx |
||
968 | or dword [eax], 1 |
||
969 | lea eax, [ebp+8] |
||
970 | add esp, 8 |
||
971 | pop edi |
||
972 | pop ebp |
||
973 | ret |
||
1211 | Lrz | 974 | |
276 | serge | 975 | .large: |
976 | |||
977 | ; v->head = nb|PINUSE_BIT|CINUSE_BIT; |
||
978 | ; r->head = rsize|PINUSE_BIT; |
||
979 | |||
980 | mov edx, edi |
||
981 | or ebx, 3 |
||
982 | mov [ebp+4], ebx |
||
983 | or edx, 1 |
||
984 | mov [esi+4], edx |
||
985 | |||
986 | ; (r+rsize)->prev_foot = rsize; |
||
987 | ; insert_large_chunk((tchunkptr)r, rsize); |
||
988 | |||
989 | mov [esi+edi], edi |
||
326 | serge | 990 | mov eax, edi |
991 | mov ecx, esi |
||
992 | call insert_chunk |
||
276 | serge | 993 | |
994 | lea eax, [ebp+8] |
||
995 | add esp, 8 |
||
996 | pop edi |
||
997 | pop ebp |
||
998 | ret |
||
1211 | Lrz | 999 | |
276 | serge | 1000 | .done: |
1001 | add esp, 8 |
||
1002 | pop edi |
||
1003 | pop ebp |
||
1004 | xor eax, eax |
||
1005 | ret |
||
1006 | |||
1007 | init_malloc: |
||
1008 | |||
753 | serge | 1009 | stdcall kernel_alloc, 0x40000 |
276 | serge | 1010 | |
1011 | mov [mst.top], eax |
||
1012 | mov [mst.topsize], 128*1024 |
||
1013 | mov dword [eax+4], (128*1024) or 1 |
||
1014 | mov eax, mst.smallbins |
||
1211 | Lrz | 1015 | |
276 | serge | 1016 | @@: |
1017 | mov [eax+8], eax |
||
1018 | mov [eax+12], eax |
||
1019 | add eax, 16 |
||
1020 | cmp eax, mst.smallbins+512 |
||
465 | serge | 1021 | jb @B |
276 | serge | 1022 | |
1023 | ret>> |
||
1024 |