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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: 747 $ |
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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23 | malloc: |
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24 | push esi |
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25 | |||
26 | ; nb = ((size+7)&~7)+8; |
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27 | |||
28 | mov esi, eax ;size |
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29 | add esi, 7 |
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30 | and esi, -8 |
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31 | add esi, 8 |
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32 | |||
33 | mov ebx, mst.mutex |
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34 | call wait_mutex ;ebx |
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35 | |||
36 | cmp esi, 256 |
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37 | jae .large |
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38 | |||
39 | mov ecx, esi |
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326 | serge | 40 | shr ecx, 3 |
276 | serge | 41 | or eax, -1 |
42 | shl eax, cl |
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43 | and eax, [mst.smallmap] |
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44 | jz .small |
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45 | |||
46 | push ebp |
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47 | push edi |
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48 | |||
49 | bsf eax, eax |
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50 | mov ebx, eax |
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51 | |||
52 | ; psize= idx<<3; |
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53 | ; B = &ms.smallbins[idx]; |
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54 | ; p = B->fd; |
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55 | ; F = p->fd; |
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56 | ; rsize= psize-nb; |
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57 | |||
58 | lea ebp, [eax*8] ;ebp= psize |
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59 | shl eax, 4 |
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60 | lea edi, [mst.smallbins+eax] ;edi= B |
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61 | mov edx, [edi+8] ;edx= p |
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62 | mov eax, [edx+8] ;eax= F |
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63 | mov ecx, ebp |
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64 | sub ecx, esi ;ecx= rsize |
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65 | |||
66 | ; if (B == F) |
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67 | cmp edi, eax |
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68 | jne @F |
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69 | |||
70 | btr [mst.smallmap], ebx |
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71 | @@: |
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72 | |||
73 | ; B->fd = F; |
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74 | ; F->bk = B; |
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75 | ; if(rsize<16) |
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76 | |||
77 | cmp ecx, 16 |
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78 | mov [edi+8], eax |
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79 | mov [eax+12], edi |
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80 | jae .split |
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81 | |||
82 | ; p->head = psize|PINUSE_BIT|CINUSE_BIT; |
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83 | ; (p + psize)->head |= PINUSE_BIT; |
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84 | |||
85 | lea eax, [edx+8] |
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86 | or dword [edx+ebp+4], 1 |
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87 | |||
88 | or ebp, 3 |
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89 | mov [edx+4], ebp |
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90 | |||
91 | pop edi |
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92 | pop ebp |
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93 | .done: |
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94 | pop esi |
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95 | mov [mst.mutex], 0 |
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96 | ret |
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97 | .split: |
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98 | lea ebx, [edx+8] ;ebx=mem |
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99 | |||
100 | ; r = chunk_plus_offset(p, nb); |
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101 | ; p->head = nb|PINUSE_BIT|CINUSE_BIT; |
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102 | ; r->head = rsize|PINUSE_BIT; |
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103 | |||
104 | lea eax, [edx+esi] ;eax= r |
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105 | or esi, 3 |
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106 | mov [edx+4], esi |
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107 | |||
108 | mov edx, ecx |
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109 | or edx, 1 |
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110 | mov [eax+4], edx |
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111 | |||
112 | ; (r + rsize)->prev_foot = rsize; |
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113 | |||
114 | mov [eax+ecx], ecx |
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115 | |||
116 | ; I = rsize>>3; |
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117 | |||
118 | shr ecx, 3 |
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119 | |||
120 | ; ms.smallmap |= 1<< I; |
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121 | bts [mst.smallmap], ecx |
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122 | |||
123 | ; B = &ms.smallbins[I]; |
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124 | |||
125 | shl ecx, 4 |
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126 | pop edi |
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127 | pop ebp |
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128 | add ecx, mst.smallbins ;ecx= B |
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129 | |||
130 | mov edx, [ecx+8] ; F = B->fd; |
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131 | mov [ecx+8], eax ; B->fd = r; |
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132 | mov [edx+12], eax ; F->bk = r; |
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133 | mov [eax+8], edx ; r->fd = F; |
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134 | mov [eax+12], ecx ; r->bk = B; |
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135 | mov eax, ebx |
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136 | pop esi |
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137 | ret |
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138 | .small: |
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139 | |||
140 | ; if (ms.treemap != 0 && (mem = malloc_small(nb)) != 0) |
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141 | |||
142 | cmp [mst.treemap], 0 |
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143 | je .from_top |
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144 | mov eax, esi |
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145 | call malloc_small |
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146 | test eax, eax |
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147 | jz .from_top |
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148 | pop esi |
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149 | and [mst.mutex], 0 |
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150 | ret |
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151 | .large: |
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152 | |||
153 | ; if (ms.treemap != 0 && (mem = malloc_large(nb)) != 0) |
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154 | |||
155 | cmp [mst.treemap], 0 |
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156 | je .from_top |
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157 | |||
158 | call malloc_large ;esi= nb |
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159 | test eax, eax |
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160 | jne .done |
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161 | .from_top: |
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162 | |||
163 | ; if (nb < ms.topsize) |
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164 | |||
165 | mov eax, [mst.topsize] |
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166 | cmp esi, eax |
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167 | jae .fail |
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168 | |||
169 | ; rsize = ms.topsize -= nb; |
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170 | ; p = ms.top; |
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171 | |||
172 | mov ecx, [mst.top] |
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173 | sub eax, esi |
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174 | mov [mst.topsize], eax |
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175 | |||
176 | ; r = ms.top = chunk_plus_offset(p, nb); |
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177 | ; r->head = rsize | PINUSE_BIT; |
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178 | ; p->head = nb |PINUSE_BIT|CINUSE_BIT; |
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179 | |||
180 | lea edx, [ecx+esi] |
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181 | or eax, 1 |
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182 | mov [mst.top], edx |
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183 | or esi, 3 |
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184 | mov [edx+4], eax |
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185 | mov [ecx+4], esi |
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186 | lea eax, [ecx+8] |
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187 | pop esi |
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188 | and [mst.mutex], 0 |
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189 | ret |
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190 | .fail: |
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191 | xor eax, eax |
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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 | |||
196 | ; param |
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197 | ; eax= mem |
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198 | |||
199 | align 4 |
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200 | free: |
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201 | push edi |
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202 | mov edi, eax |
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203 | add edi, -8 |
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204 | |||
205 | ; if(p->head & CINUSE_BIT) |
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206 | |||
207 | test byte [edi+4], 2 |
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208 | je .fail |
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209 | |||
210 | mov ebx, mst.mutex |
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211 | call wait_mutex ;ebx |
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212 | |||
213 | ; psize = p->head & (~3); |
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214 | |||
215 | mov eax, [edi+4] |
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216 | push esi |
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217 | mov esi, eax |
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218 | and esi, -4 |
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219 | |||
220 | ; next = chunk_plus_offset(p, psize); |
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221 | ; if(!(p->head & PINUSE_BIT)) |
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222 | |||
223 | test al, 1 |
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224 | lea ebx, [esi+edi] |
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225 | jne .next |
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226 | |||
227 | ; prevsize = p->prev_foot; |
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228 | ; prev=p - prevsize; |
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229 | ; psize += prevsize; |
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230 | ; p = prev; |
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231 | |||
232 | mov ecx, [edi] ;ecx= prevsize |
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233 | add esi, ecx ;esi= psize |
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234 | sub edi, ecx ;edi= p |
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235 | |||
236 | ; if (prevsize < 256) |
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237 | |||
238 | cmp ecx, 256 |
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239 | jae .unlink_large |
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240 | |||
241 | mov eax, [edi+8] ;F = p->fd; |
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242 | mov edx, [edi+12] ;B = p->bk; |
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243 | |||
244 | ; if (F == B) |
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245 | ; ms.smallmap &= ~(1<< I); |
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246 | shr ecx, 3 |
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247 | cmp eax, edx |
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248 | jne @F |
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249 | and [mst.smallmap], ecx |
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250 | @@: |
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251 | mov [eax+12], edx ;F->bk = B; |
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252 | mov [edx+8], eax ;B->fd = F |
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253 | jmp .next |
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254 | .unlink_large: |
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255 | mov edx, edi |
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256 | call unlink_large_chunk |
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257 | .next: |
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258 | |||
259 | ; if(next->head & PINUSE_BIT) |
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260 | |||
261 | mov eax, [ebx+4] |
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262 | test al, 1 |
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263 | jz .fail2 |
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264 | |||
265 | ; if (! (next->head & CINUSE_BIT)) |
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266 | |||
267 | test al, 2 |
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268 | jnz .fix_next |
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269 | |||
270 | ; if (next == ms.top) |
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271 | |||
272 | cmp ebx, [mst.top] |
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273 | jne @F |
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274 | |||
275 | ; tsize = ms.topsize += psize; |
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276 | |||
277 | mov eax, [mst.topsize] |
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278 | add eax, esi |
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279 | mov [mst.topsize], eax |
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280 | |||
281 | ; ms.top = p; |
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282 | ; p->head = tsize | PINUSE_BIT; |
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283 | |||
284 | or eax, 1 |
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285 | mov [mst.top], edi |
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286 | mov [edi+4], eax |
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287 | .fail2: |
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288 | and [mst.mutex], 0 |
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289 | pop esi |
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290 | .fail: |
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291 | pop edi |
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292 | ret |
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293 | @@: |
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294 | |||
295 | ; nsize = next->head & ~INUSE_BITS; |
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296 | |||
297 | and eax, -4 |
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298 | add esi, eax ;psize += nsize; |
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299 | |||
300 | ; if (nsize < 256) |
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301 | |||
302 | cmp eax, 256 |
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303 | jae .unl_large |
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304 | |||
305 | mov edx, [ebx+8] ;F = next->fd |
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306 | mov ebx, [ebx+12] ;B = next->bk |
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307 | |||
308 | ; if (F == B) |
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309 | |||
310 | cmp edx, ebx |
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311 | jne @F |
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312 | mov ecx, eax |
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313 | shr ecx, 3 |
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314 | btr [mst.smallmap], ecx |
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315 | @@: |
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316 | mov [edx+12], ebx ;F->bk = B |
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317 | |||
318 | ; p->head = psize|PINUSE_BIT; |
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319 | |||
320 | mov ecx, esi |
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321 | mov [ebx+8], edx |
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322 | or ecx, 1 |
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323 | mov [edi+4], ecx |
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324 | |||
325 | ; (p+psize)->prev_foot = psize; |
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326 | |||
327 | mov [esi+edi], esi |
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328 | |||
329 | ; insert_chunk(p,psize); |
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330 | |||
331 | mov eax, esi |
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332 | pop esi |
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333 | mov ecx, edi |
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334 | pop edi |
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335 | jmp insert_chunk |
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336 | .unl_large: |
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337 | |||
338 | ; unlink_large_chunk((tchunkptr)next); |
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339 | |||
340 | mov edx, ebx |
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341 | call unlink_large_chunk |
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342 | ; p->head = psize|PINUSE_BIT; |
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343 | |||
344 | mov ecx, esi |
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345 | or ecx, 1 |
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346 | mov [edi+4], ecx |
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347 | |||
348 | ; (p+psize)->prev_foot = psize; |
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349 | |||
350 | mov [esi+edi], esi |
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351 | |||
352 | ; insert_chunk(p,psize); |
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353 | |||
354 | mov eax, esi |
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355 | pop esi |
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356 | mov ecx, edi |
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357 | pop edi |
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358 | jmp insert_chunk |
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359 | .fix_next: |
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360 | |||
361 | ; (p+psize)->prev_foot = psize; |
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362 | ; next->head &= ~PINUSE_BIT; |
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363 | ; p->head = psize|PINUSE_BIT; |
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364 | |||
365 | and eax, -2 |
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366 | mov edx, esi |
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367 | mov [ebx+4], eax |
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368 | or edx, 1 |
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369 | mov [edi+4], edx |
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370 | |||
371 | ; (p+psize)->prev_foot = psize; |
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372 | |||
373 | mov [esi+edi], esi |
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374 | ; insert_chunk(p,psize); |
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375 | |||
376 | mov eax, esi |
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377 | pop esi |
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378 | mov ecx, edi |
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379 | pop edi |
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380 | jmp insert_chunk |
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381 | |||
382 | ; param |
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383 | ; ecx = chunk |
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384 | ; eax = size |
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385 | |||
386 | align 4 |
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387 | insert_chunk: |
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388 | |||
389 | cmp eax, 256 |
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390 | push esi |
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391 | mov esi, ecx |
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392 | jae .large |
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393 | |||
394 | ; I = S>>3; |
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395 | ; ms.smallmap |= 1<< I; |
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396 | |||
397 | shr eax, 3 |
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398 | bts [mst.smallmap], eax |
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399 | |||
400 | ; B = &ms.smallbins[I]; |
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401 | |||
402 | shl eax, 4 |
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403 | add eax, mst.smallbins |
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404 | mov edx, [eax+8] ;F = B->fd |
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405 | mov [eax+8], esi ;B->fd = P |
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406 | mov [edx+12], esi ;F->bk = P |
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407 | mov [esi+8], edx ;P->fd = F |
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408 | mov [esi+12], eax ;P->bk = B |
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409 | pop esi |
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410 | and [mst.mutex], 0 |
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411 | ret |
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412 | .large: |
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413 | mov ebx, eax |
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414 | call insert_large_chunk |
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415 | pop esi |
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416 | and [mst.mutex], 0 |
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417 | ret |
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418 | |||
419 | align 4 |
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420 | |||
421 | ; param |
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422 | ; esi= chunk |
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423 | ; ebx= size |
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424 | |||
425 | align 4 |
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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 | |||
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; |
||
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 | |||
521 | .insert_child: |
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522 | |||
523 | ; *C = X; |
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524 | mov [ecx], esi |
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525 | .done: |
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526 | |||
527 | ; X->parent = T; |
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528 | mov [esi+24], edx |
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529 | |||
530 | ; X->fd = X->bk = X; |
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531 | mov [esi+12], esi |
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532 | mov [esi+8], esi |
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533 | ret |
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534 | |||
535 | |||
536 | ; param |
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537 | ; edx= chunk |
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538 | |||
539 | align 4 |
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540 | unlink_large_chunk: |
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541 | |||
542 | mov eax, [edx+12] |
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543 | cmp eax, edx |
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544 | push edi |
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545 | mov edi, [edx+24] |
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546 | je @F |
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547 | |||
548 | mov ecx, [edx+8] ;F = X->fd |
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549 | mov [ecx+12], eax ;F->bk = R; |
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550 | mov [eax+8], ecx ;R->fd = F |
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551 | jmp .parent |
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552 | @@: |
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553 | mov eax, [edx+20] |
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554 | test eax, eax |
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555 | push esi |
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556 | lea esi, [edx+20] |
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557 | jne .loop |
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558 | |||
559 | mov eax, [edx+16] |
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560 | test eax, eax |
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561 | lea esi, [edx+16] |
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562 | je .l2 |
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563 | .loop: |
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564 | cmp dword [eax+20], 0 |
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565 | lea ecx, [eax+20] |
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566 | jne @F |
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567 | |||
568 | cmp dword [eax+16], 0 |
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569 | lea ecx, [eax+16] |
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570 | je .l1 |
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571 | @@: |
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572 | mov eax, [ecx] |
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573 | mov esi, ecx |
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574 | jmp .loop |
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575 | .l1: |
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576 | mov dword [esi], 0 |
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577 | .l2: |
||
578 | pop esi |
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579 | .parent: |
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580 | test edi, edi |
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581 | je .done |
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582 | |||
583 | mov ecx, [edx+28] |
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584 | cmp edx, [mst.treebins+ecx*4] |
||
585 | lea ecx, [mst.treebins+ecx*4] |
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586 | jne .l3 |
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587 | |||
588 | test eax, eax |
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589 | mov [ecx], eax |
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590 | jne .l5 |
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591 | |||
592 | mov ecx, [edx+28] |
||
593 | btr [mst.treemap], ecx |
||
594 | pop edi |
||
595 | ret |
||
596 | .l3: |
||
597 | cmp [edi+16], edx |
||
598 | jne @F |
||
599 | |||
600 | mov [edi+16], eax |
||
601 | jmp .l4 |
||
602 | @@: |
||
603 | mov [edi+20], eax |
||
604 | .l4: |
||
605 | test eax, eax |
||
606 | je .done |
||
607 | .l5: |
||
608 | mov [eax+24], edi |
||
609 | mov ecx, [edx+16] |
||
610 | test ecx, ecx |
||
611 | je .l6 |
||
612 | |||
613 | mov [eax+16], ecx |
||
614 | mov [ecx+24], eax |
||
615 | .l6: |
||
616 | mov edx, [edx+20] |
||
617 | test edx, edx |
||
618 | je .done |
||
619 | |||
620 | mov [eax+20], edx |
||
621 | mov [edx+24], eax |
||
622 | .done: |
||
623 | pop edi |
||
624 | ret |
||
625 | |||
626 | ; param |
||
627 | ; esi= nb |
||
628 | |||
629 | align 4 |
||
630 | malloc_small: |
||
631 | push ebp |
||
632 | mov ebp, esi |
||
633 | |||
634 | push edi |
||
635 | |||
636 | bsf eax,[mst.treemap] |
||
637 | mov ecx, [mst.treebins+eax*4] |
||
638 | |||
639 | ; rsize = (t->head & ~INUSE_BITS) - nb; |
||
640 | |||
641 | mov edi, [ecx+4] |
||
642 | and edi, -4 |
||
643 | sub edi, esi |
||
644 | .loop: |
||
645 | mov ebx, ecx |
||
646 | .loop_1: |
||
647 | |||
648 | ; while ((t = leftmost_child(t)) != 0) |
||
649 | |||
650 | mov eax, [ecx+16] |
||
651 | test eax, eax |
||
652 | jz @F |
||
653 | mov ecx, eax |
||
654 | jmp .l1 |
||
655 | @@: |
||
656 | mov ecx, [ecx+20] |
||
657 | .l1: |
||
658 | test ecx, ecx |
||
659 | jz .unlink |
||
660 | |||
661 | ; trem = (t->head & ~INUSE_BITS) - nb; |
||
662 | |||
663 | mov eax, [ecx+4] |
||
664 | and eax, -4 |
||
665 | sub eax, ebp |
||
666 | |||
667 | ; if (trem < rsize) |
||
668 | |||
669 | cmp eax, edi |
||
670 | jae .loop_1 |
||
671 | |||
672 | ; rsize = trem; |
||
673 | |||
674 | mov edi, eax |
||
675 | jmp .loop |
||
676 | .unlink: |
||
677 | |||
678 | |||
679 | ; r = chunk_plus_offset((mchunkptr)v, nb); |
||
680 | ; unlink_large_chunk(v); |
||
681 | |||
682 | mov edx, ebx |
||
683 | lea esi, [ebx+ebp] |
||
684 | call unlink_large_chunk |
||
685 | |||
686 | ; if (rsize < 16) |
||
687 | |||
688 | cmp edi, 16 |
||
689 | jae .split |
||
690 | |||
691 | ; v->head = (rsize + nb)|PINUSE_BIT|CINUSE_BIT; |
||
692 | |||
693 | lea ecx, [edi+ebp] |
||
694 | |||
695 | ; (v+rsize + nb)->head |= PINUSE_BIT; |
||
696 | |||
697 | add edi, ebx |
||
698 | lea eax, [edi+ebp+4] |
||
699 | pop edi |
||
700 | or ecx, 3 |
||
701 | mov [ebx+4], ecx |
||
702 | or dword [eax], 1 |
||
703 | pop ebp |
||
704 | |||
705 | lea eax, [ebx+8] |
||
706 | ret |
||
707 | .split: |
||
708 | |||
709 | ; v->head = nb|PINUSE_BIT|CINUSE_BIT; |
||
710 | ; r->head = rsize|PINUSE_BIT; |
||
711 | ; (r+rsize)->prev_foot = rsize; |
||
712 | |||
713 | or ebp, 3 |
||
714 | mov edx, edi |
||
715 | or edx, 1 |
||
716 | |||
717 | cmp edi, 256 |
||
718 | mov [ebx+4], ebp |
||
719 | mov [esi+4], edx |
||
720 | mov [esi+edi], edi |
||
721 | jae .large |
||
722 | |||
723 | shr edi, 3 |
||
724 | bts [mst.smallmap], edi |
||
725 | |||
726 | mov eax, edi |
||
727 | shl eax, 4 |
||
728 | add eax, mst.smallbins |
||
729 | |||
730 | mov edx, [eax+8] |
||
731 | mov [eax+8], esi |
||
732 | mov [edx+12], esi |
||
733 | pop edi |
||
734 | mov [esi+12], eax |
||
735 | mov [esi+8], edx |
||
736 | pop ebp |
||
737 | lea eax, [ebx+8] |
||
738 | ret |
||
739 | .large: |
||
740 | lea eax, [ebx+8] |
||
741 | push eax |
||
742 | mov ebx, edi |
||
743 | call insert_large_chunk |
||
744 | pop eax |
||
745 | pop edi |
||
746 | pop ebp |
||
747 | ret |
||
748 | |||
749 | |||
750 | ; param |
||
751 | ; esi= nb |
||
752 | |||
753 | align 4 |
||
754 | malloc_large: |
||
755 | .idx equ esp+4 |
||
756 | .rst equ esp |
||
757 | |||
758 | push ebp |
||
759 | push edi |
||
760 | sub esp, 8 |
||
761 | ; v = 0; |
||
762 | ; rsize = -nb; |
||
763 | |||
764 | mov edi, esi |
||
765 | mov ebx, esi |
||
766 | xor ebp, ebp |
||
767 | neg edi |
||
768 | |||
769 | ; idx = compute_tree_index(nb); |
||
770 | |||
771 | mov edx, esi |
||
772 | shr edx, 8 |
||
773 | bsr eax, edx |
||
774 | lea ecx, [eax+7] |
||
775 | shr esi, cl |
||
776 | and esi, 1 |
||
777 | lea ecx, [esi+eax*2] |
||
778 | mov [.idx], ecx |
||
779 | |||
780 | ; if ((t = ms.treebins[idx]) != 0) |
||
781 | |||
782 | mov eax, [mst.treebins+ecx*4] |
||
783 | test eax, eax |
||
784 | jz .l3 |
||
785 | |||
786 | ; sizebits = nb << leftshift_for_tree_index(idx); |
||
787 | |||
788 | cmp ecx, 31 |
||
789 | jne @F |
||
790 | xor ecx, ecx |
||
791 | jmp .l1 |
||
792 | @@: |
||
793 | mov edx, ecx |
||
794 | shr edx, 1 |
||
795 | mov ecx, 37 |
||
796 | sub ecx, edx |
||
797 | .l1: |
||
798 | mov edx, ebx |
||
799 | shl edx, cl |
||
800 | |||
801 | ; rst = 0; |
||
802 | mov [.rst], ebp |
||
803 | .loop: |
||
804 | |||
805 | ; trem = (t->head & ~INUSE_BITS) - nb; |
||
806 | |||
807 | mov ecx, [eax+4] |
||
808 | and ecx, -4 |
||
809 | sub ecx, ebx |
||
810 | |||
811 | ; if (trem < rsize) |
||
812 | |||
813 | cmp ecx, edi |
||
814 | jae @F |
||
815 | ; v = t; |
||
816 | ; if ((rsize = trem) == 0) |
||
817 | |||
818 | test ecx, ecx |
||
819 | mov ebp, eax |
||
820 | mov edi, ecx |
||
821 | je .l2 |
||
822 | @@: |
||
823 | |||
824 | ; rt = t->child[1]; |
||
825 | |||
826 | mov ecx, [eax+20] |
||
827 | |||
828 | ; t = t->child[(sizebits >> 31) & 1]; |
||
829 | |||
830 | mov esi, edx |
||
831 | shr esi, 31 |
||
832 | |||
833 | ; if (rt != 0 && rt != t) |
||
834 | |||
835 | test ecx, ecx |
||
836 | mov eax, [eax+esi*4+16] |
||
837 | jz @F |
||
838 | cmp ecx, eax |
||
839 | jz @F |
||
840 | |||
841 | ; rst = rt; |
||
842 | mov [.rst], ecx |
||
843 | @@: |
||
844 | ; if (t == 0) |
||
845 | |||
846 | test eax, eax |
||
847 | jz @F |
||
848 | |||
849 | ; sizebits <<= 1; |
||
850 | |||
851 | add edx, edx |
||
852 | jmp .loop |
||
853 | @@: |
||
854 | ; t = rst; |
||
855 | mov eax, [.rst] |
||
856 | .l2: |
||
857 | ; if (t == 0 && v == 0) |
||
858 | |||
859 | test eax, eax |
||
860 | jne .l4 |
||
861 | test ebp, ebp |
||
862 | jne .l7 |
||
863 | mov ecx, [.idx] |
||
864 | .l3: |
||
865 | |||
866 | ; leftbits = (-1< |
||
867 | ; if (leftbits != 0) |
||
868 | |||
869 | or edx, -1 |
||
870 | shl edx, cl |
||
871 | and edx, [mst.treemap] |
||
872 | jz @F |
||
873 | |||
874 | bsf eax, edx |
||
875 | ; t = ms.treebins[i]; |
||
876 | mov eax, [mst.treebins+eax*4] |
||
877 | @@: |
||
878 | |||
879 | ; while (t != 0) |
||
880 | test eax, eax |
||
881 | jz .l5 |
||
882 | .l4: |
||
883 | |||
884 | ; trem = (t->head & ~INUSE_BITS) - nb; |
||
885 | |||
886 | mov ecx, [eax+4] |
||
887 | and ecx, -4 |
||
888 | sub ecx, ebx |
||
889 | |||
890 | ; if (trem < rsize) |
||
891 | |||
892 | cmp ecx, edi |
||
893 | jae @F |
||
894 | ; rsize = trem; |
||
895 | |||
896 | mov edi, ecx |
||
897 | ; v = t; |
||
898 | mov ebp, eax |
||
899 | @@: |
||
900 | |||
901 | ; t = leftmost_child(t); |
||
902 | |||
903 | mov ecx, [eax+16] |
||
904 | test ecx, ecx |
||
905 | je @F |
||
906 | mov eax, ecx |
||
907 | jmp .l6 |
||
908 | @@: |
||
909 | mov eax, [eax+20] |
||
910 | .l6: |
||
911 | |||
912 | ; while (t != 0) |
||
913 | |||
914 | test eax, eax |
||
915 | jne .l4 |
||
916 | .l5: |
||
917 | |||
918 | ; if (v != 0) |
||
919 | |||
920 | test ebp, ebp |
||
921 | jz .done |
||
922 | .l7: |
||
923 | |||
924 | ; r = chunk_plus_offset((mchunkptr)v, nb); |
||
925 | ; unlink_large_chunk(v); |
||
926 | |||
927 | mov edx, ebp |
||
928 | lea esi, [ebx+ebp] |
||
929 | call unlink_large_chunk |
||
930 | |||
326 | serge | 931 | ; if (rsize < 16) |
276 | serge | 932 | |
326 | serge | 933 | cmp edi, 16 |
276 | serge | 934 | jae .large |
935 | |||
936 | ; v->head = (rsize + nb)|PINUSE_BIT|CINUSE_BIT; |
||
937 | |||
938 | lea ecx, [edi+ebx] |
||
939 | |||
940 | ; (v+rsize + nb)->head |= PINUSE_BIT; |
||
941 | |||
942 | add edi, ebp |
||
943 | lea eax, [edi+ebx+4] |
||
944 | or ecx, 3 |
||
945 | mov [ebp+4], ecx |
||
946 | or dword [eax], 1 |
||
947 | lea eax, [ebp+8] |
||
948 | add esp, 8 |
||
949 | pop edi |
||
950 | pop ebp |
||
951 | ret |
||
952 | .large: |
||
953 | |||
954 | ; v->head = nb|PINUSE_BIT|CINUSE_BIT; |
||
955 | ; r->head = rsize|PINUSE_BIT; |
||
956 | |||
957 | mov edx, edi |
||
958 | or ebx, 3 |
||
959 | mov [ebp+4], ebx |
||
960 | or edx, 1 |
||
961 | mov [esi+4], edx |
||
962 | |||
963 | ; (r+rsize)->prev_foot = rsize; |
||
964 | ; insert_large_chunk((tchunkptr)r, rsize); |
||
965 | |||
966 | mov [esi+edi], edi |
||
326 | serge | 967 | mov eax, edi |
968 | mov ecx, esi |
||
969 | call insert_chunk |
||
276 | serge | 970 | |
971 | lea eax, [ebp+8] |
||
972 | add esp, 8 |
||
973 | pop edi |
||
974 | pop ebp |
||
975 | ret |
||
976 | .done: |
||
977 | add esp, 8 |
||
978 | pop edi |
||
979 | pop ebp |
||
980 | xor eax, eax |
||
981 | ret |
||
982 | |||
983 | align 4 |
||
984 | init_malloc: |
||
985 | |||
747 | serge | 986 | stdcall kernel_alloc, 0x30000 |
276 | serge | 987 | |
988 | mov [mst.top], eax |
||
989 | mov [mst.topsize], 128*1024 |
||
990 | mov dword [eax+4], (128*1024) or 1 |
||
991 | mov eax, mst.smallbins |
||
992 | @@: |
||
993 | mov [eax+8], eax |
||
994 | mov [eax+12], eax |
||
995 | add eax, 16 |
||
996 | cmp eax, mst.smallbins+512 |
||
465 | serge | 997 | jb @B |
276 | serge | 998 | |
999 | ret>> |
||
1000 | |||
1001 | |||
1002 | |||
1003 |