Rev 890 | Details | Compare with Previous | Last modification | View Log | RSS feed
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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: 1066 $ |
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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890 | serge | 23 | |
24 | align 4 |
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25 | _Kmalloc: |
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276 | serge | 26 | malloc: |
27 | push esi |
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28 | |||
29 | ; nb = ((size+7)&~7)+8; |
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30 | |||
31 | mov esi, eax ;size |
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32 | add esi, 7 |
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33 | and esi, -8 |
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34 | add esi, 8 |
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35 | |||
36 | mov ebx, mst.mutex |
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37 | call wait_mutex ;ebx |
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38 | |||
39 | cmp esi, 256 |
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40 | jae .large |
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41 | |||
42 | mov ecx, esi |
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326 | serge | 43 | shr ecx, 3 |
276 | serge | 44 | or eax, -1 |
45 | shl eax, cl |
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46 | and eax, [mst.smallmap] |
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47 | jz .small |
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48 | |||
49 | push ebp |
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50 | push edi |
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51 | |||
52 | bsf eax, eax |
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53 | mov ebx, eax |
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54 | |||
55 | ; psize= idx<<3; |
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56 | ; B = &ms.smallbins[idx]; |
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57 | ; p = B->fd; |
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58 | ; F = p->fd; |
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59 | ; rsize= psize-nb; |
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60 | |||
61 | lea ebp, [eax*8] ;ebp= psize |
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62 | shl eax, 4 |
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63 | lea edi, [mst.smallbins+eax] ;edi= B |
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64 | mov edx, [edi+8] ;edx= p |
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65 | mov eax, [edx+8] ;eax= F |
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66 | mov ecx, ebp |
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67 | sub ecx, esi ;ecx= rsize |
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68 | |||
69 | ; if (B == F) |
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70 | cmp edi, eax |
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71 | jne @F |
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72 | |||
73 | btr [mst.smallmap], ebx |
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74 | @@: |
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75 | |||
76 | ; B->fd = F; |
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77 | ; F->bk = B; |
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78 | ; if(rsize<16) |
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79 | |||
80 | cmp ecx, 16 |
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81 | mov [edi+8], eax |
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82 | mov [eax+12], edi |
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83 | jae .split |
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84 | |||
85 | ; p->head = psize|PINUSE_BIT|CINUSE_BIT; |
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86 | ; (p + psize)->head |= PINUSE_BIT; |
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87 | |||
88 | lea eax, [edx+8] |
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89 | or dword [edx+ebp+4], 1 |
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90 | |||
91 | or ebp, 3 |
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92 | mov [edx+4], ebp |
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93 | |||
94 | pop edi |
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95 | pop ebp |
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96 | .done: |
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97 | pop esi |
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98 | mov [mst.mutex], 0 |
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99 | ret |
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100 | .split: |
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101 | lea ebx, [edx+8] ;ebx=mem |
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102 | |||
103 | ; r = chunk_plus_offset(p, nb); |
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104 | ; p->head = nb|PINUSE_BIT|CINUSE_BIT; |
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105 | ; r->head = rsize|PINUSE_BIT; |
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106 | |||
107 | lea eax, [edx+esi] ;eax= r |
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108 | or esi, 3 |
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109 | mov [edx+4], esi |
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110 | |||
111 | mov edx, ecx |
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112 | or edx, 1 |
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113 | mov [eax+4], edx |
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114 | |||
115 | ; (r + rsize)->prev_foot = rsize; |
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116 | |||
117 | mov [eax+ecx], ecx |
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118 | |||
119 | ; I = rsize>>3; |
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120 | |||
121 | shr ecx, 3 |
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122 | |||
123 | ; ms.smallmap |= 1<< I; |
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124 | bts [mst.smallmap], ecx |
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125 | |||
126 | ; B = &ms.smallbins[I]; |
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127 | |||
128 | shl ecx, 4 |
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129 | pop edi |
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130 | pop ebp |
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131 | add ecx, mst.smallbins ;ecx= B |
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132 | |||
133 | mov edx, [ecx+8] ; F = B->fd; |
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134 | mov [ecx+8], eax ; B->fd = r; |
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135 | mov [edx+12], eax ; F->bk = r; |
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136 | mov [eax+8], edx ; r->fd = F; |
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137 | mov [eax+12], ecx ; r->bk = B; |
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138 | mov eax, ebx |
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139 | pop esi |
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140 | ret |
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141 | .small: |
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142 | |||
143 | ; if (ms.treemap != 0 && (mem = malloc_small(nb)) != 0) |
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144 | |||
145 | cmp [mst.treemap], 0 |
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146 | je .from_top |
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147 | mov eax, esi |
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148 | call malloc_small |
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149 | test eax, eax |
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150 | jz .from_top |
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151 | pop esi |
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152 | and [mst.mutex], 0 |
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153 | ret |
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154 | .large: |
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155 | |||
156 | ; if (ms.treemap != 0 && (mem = malloc_large(nb)) != 0) |
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157 | |||
158 | cmp [mst.treemap], 0 |
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159 | je .from_top |
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160 | |||
161 | call malloc_large ;esi= nb |
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162 | test eax, eax |
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163 | jne .done |
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164 | .from_top: |
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165 | |||
166 | ; if (nb < ms.topsize) |
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167 | |||
168 | mov eax, [mst.topsize] |
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169 | cmp esi, eax |
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170 | jae .fail |
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171 | |||
172 | ; rsize = ms.topsize -= nb; |
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173 | ; p = ms.top; |
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174 | |||
175 | mov ecx, [mst.top] |
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176 | sub eax, esi |
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177 | mov [mst.topsize], eax |
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178 | |||
179 | ; r = ms.top = chunk_plus_offset(p, nb); |
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180 | ; r->head = rsize | PINUSE_BIT; |
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181 | ; p->head = nb |PINUSE_BIT|CINUSE_BIT; |
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182 | |||
183 | lea edx, [ecx+esi] |
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184 | or eax, 1 |
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185 | mov [mst.top], edx |
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186 | or esi, 3 |
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187 | mov [edx+4], eax |
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188 | mov [ecx+4], esi |
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189 | lea eax, [ecx+8] |
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190 | pop esi |
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191 | and [mst.mutex], 0 |
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192 | ret |
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193 | .fail: |
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194 | xor eax, eax |
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195 | pop esi |
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196 | and [mst.mutex], 0 |
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197 | ret |
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198 | |||
199 | ; param |
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200 | ; eax= mem |
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201 | |||
202 | align 4 |
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890 | serge | 203 | _Kfree: |
276 | serge | 204 | free: |
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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253 | and [mst.smallmap], ecx |
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254 | @@: |
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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 | align 4 |
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391 | insert_chunk: |
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392 | |||
393 | cmp eax, 256 |
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394 | push esi |
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395 | mov esi, ecx |
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396 | jae .large |
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397 | |||
398 | ; I = S>>3; |
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399 | ; ms.smallmap |= 1<< I; |
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400 | |||
401 | shr eax, 3 |
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402 | bts [mst.smallmap], eax |
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403 | |||
404 | ; B = &ms.smallbins[I]; |
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405 | |||
406 | shl eax, 4 |
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407 | add eax, mst.smallbins |
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408 | mov edx, [eax+8] ;F = B->fd |
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409 | mov [eax+8], esi ;B->fd = P |
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410 | mov [edx+12], esi ;F->bk = P |
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411 | mov [esi+8], edx ;P->fd = F |
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412 | mov [esi+12], eax ;P->bk = B |
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413 | pop esi |
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414 | and [mst.mutex], 0 |
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415 | ret |
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416 | .large: |
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417 | mov ebx, eax |
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418 | call insert_large_chunk |
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419 | pop esi |
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420 | and [mst.mutex], 0 |
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421 | ret |
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422 | |||
423 | align 4 |
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424 | |||
425 | ; param |
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426 | ; esi= chunk |
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427 | ; ebx= size |
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428 | |||
429 | align 4 |
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430 | insert_large_chunk: |
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431 | |||
432 | ; I = compute_tree_index(S); |
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433 | |||
434 | mov edx, ebx |
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435 | shr edx, 8 |
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436 | bsr eax, edx |
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437 | lea ecx, [eax+7] |
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438 | mov edx, ebx |
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439 | shr edx, cl |
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440 | and edx, 1 |
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441 | lea ecx, [edx+eax*2] |
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442 | |||
443 | ; X->index = I; |
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444 | mov dword [esi+28], ecx |
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445 | |||
446 | ; X->child[0] = X->child[1] = 0; |
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447 | and dword [esi+20], 0 |
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448 | and dword [esi+16], 0 |
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449 | |||
450 | ; H = &ms.treebins[I]; |
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451 | |||
452 | mov eax, ecx |
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453 | lea edx, [mst.treebins+eax*4] |
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454 | |||
455 | ; if (!(ms.treemap & 1< |
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456 | bt [mst.treemap], ecx |
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457 | jc .tree |
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458 | |||
459 | ; ms.treemap |= 1< |
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460 | bts [mst.treemap], ecx |
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461 | ; *H = X; |
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462 | mov dword [edx], esi |
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463 | jmp .done |
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464 | .tree: |
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465 | |||
466 | ; T = *H; |
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467 | mov edx, [edx] |
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468 | |||
469 | ; K = S << leftshift_for_tree_index(I); |
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470 | mov eax, ecx |
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471 | shr eax, 1 |
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472 | sub ecx, 31 |
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473 | mov edi, 37 |
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474 | sub edi, eax |
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475 | neg ecx |
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476 | sbb ecx, ecx |
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477 | and ecx, edi |
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478 | mov eax, ebx |
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479 | shl eax, cl ;eax= K |
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480 | |||
481 | jmp .loop |
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482 | |||
483 | .not_eq_size: |
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484 | |||
485 | ; C = &(T->child[(K >> 31) & 1]); |
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486 | mov ecx, eax |
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487 | shr ecx, 31 |
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488 | lea ecx, [edx+ecx*4+16] |
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489 | |||
490 | ; K <<= 1; |
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491 | ; if (*C != 0) |
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492 | mov edi, [ecx] |
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493 | add eax, eax |
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494 | test edi, edi |
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495 | jz .insert_child |
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496 | |||
497 | ; T = *C; |
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498 | mov edx, edi |
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499 | .loop: |
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500 | |||
501 | ; for (;;) |
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502 | ; if ((T->head & ~INUSE_BITS) != S) |
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503 | |||
504 | mov ecx, [edx+4] |
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505 | and ecx, not 3 |
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506 | cmp ecx, ebx |
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507 | jne .not_eq_size |
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508 | |||
509 | ; F = T->fd; |
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510 | mov eax, [edx+8] |
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511 | |||
512 | ; T->fd = F->bk = X; |
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513 | mov [eax+12], esi |
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514 | mov [edx+8], esi |
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515 | |||
516 | ; X->fd = F; |
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517 | ; X->bk = T; |
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518 | ; X->parent = 0; |
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519 | |||
520 | and dword [esi+24], 0 |
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521 | mov [esi+8], eax |
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522 | mov [esi+12], edx |
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523 | ret |
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524 | |||
525 | .insert_child: |
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526 | |||
527 | ; *C = X; |
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528 | mov [ecx], esi |
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529 | .done: |
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530 | |||
531 | ; X->parent = T; |
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532 | mov [esi+24], edx |
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533 | |||
534 | ; X->fd = X->bk = X; |
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535 | mov [esi+12], esi |
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536 | mov [esi+8], esi |
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537 | ret |
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538 | |||
539 | |||
540 | ; param |
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541 | ; edx= chunk |
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542 | |||
543 | align 4 |
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544 | unlink_large_chunk: |
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545 | |||
546 | mov eax, [edx+12] |
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547 | cmp eax, edx |
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548 | push edi |
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549 | mov edi, [edx+24] |
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550 | je @F |
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551 | |||
552 | mov ecx, [edx+8] ;F = X->fd |
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553 | mov [ecx+12], eax ;F->bk = R; |
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554 | mov [eax+8], ecx ;R->fd = F |
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555 | jmp .parent |
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556 | @@: |
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557 | mov eax, [edx+20] |
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558 | test eax, eax |
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559 | push esi |
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560 | lea esi, [edx+20] |
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561 | jne .loop |
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562 | |||
563 | mov eax, [edx+16] |
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564 | test eax, eax |
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565 | lea esi, [edx+16] |
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566 | je .l2 |
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567 | .loop: |
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568 | cmp dword [eax+20], 0 |
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569 | lea ecx, [eax+20] |
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570 | jne @F |
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571 | |||
572 | cmp dword [eax+16], 0 |
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573 | lea ecx, [eax+16] |
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574 | je .l1 |
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575 | @@: |
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576 | mov eax, [ecx] |
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577 | mov esi, ecx |
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578 | jmp .loop |
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579 | .l1: |
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580 | mov dword [esi], 0 |
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581 | .l2: |
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582 | pop esi |
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583 | .parent: |
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584 | test edi, edi |
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585 | je .done |
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586 | |||
587 | mov ecx, [edx+28] |
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588 | cmp edx, [mst.treebins+ecx*4] |
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589 | lea ecx, [mst.treebins+ecx*4] |
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590 | jne .l3 |
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591 | |||
592 | test eax, eax |
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593 | mov [ecx], eax |
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594 | jne .l5 |
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595 | |||
596 | mov ecx, [edx+28] |
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597 | btr [mst.treemap], ecx |
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598 | pop edi |
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599 | ret |
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600 | .l3: |
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601 | cmp [edi+16], edx |
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602 | jne @F |
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603 | |||
604 | mov [edi+16], eax |
||
605 | jmp .l4 |
||
606 | @@: |
||
607 | mov [edi+20], eax |
||
608 | .l4: |
||
609 | test eax, eax |
||
610 | je .done |
||
611 | .l5: |
||
612 | mov [eax+24], edi |
||
613 | mov ecx, [edx+16] |
||
614 | test ecx, ecx |
||
615 | je .l6 |
||
616 | |||
617 | mov [eax+16], ecx |
||
618 | mov [ecx+24], eax |
||
619 | .l6: |
||
620 | mov edx, [edx+20] |
||
621 | test edx, edx |
||
622 | je .done |
||
623 | |||
624 | mov [eax+20], edx |
||
625 | mov [edx+24], eax |
||
626 | .done: |
||
627 | pop edi |
||
628 | ret |
||
629 | |||
630 | ; param |
||
631 | ; esi= nb |
||
632 | |||
633 | align 4 |
||
634 | malloc_small: |
||
635 | push ebp |
||
636 | mov ebp, esi |
||
637 | |||
638 | push edi |
||
639 | |||
640 | bsf eax,[mst.treemap] |
||
641 | mov ecx, [mst.treebins+eax*4] |
||
642 | |||
643 | ; rsize = (t->head & ~INUSE_BITS) - nb; |
||
644 | |||
645 | mov edi, [ecx+4] |
||
646 | and edi, -4 |
||
647 | sub edi, esi |
||
648 | .loop: |
||
649 | mov ebx, ecx |
||
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 |
||
659 | @@: |
||
660 | mov ecx, [ecx+20] |
||
661 | .l1: |
||
662 | test ecx, ecx |
||
663 | jz .unlink |
||
664 | |||
665 | ; trem = (t->head & ~INUSE_BITS) - nb; |
||
666 | |||
667 | mov eax, [ecx+4] |
||
668 | and eax, -4 |
||
669 | sub eax, ebp |
||
670 | |||
671 | ; if (trem < rsize) |
||
672 | |||
673 | cmp eax, edi |
||
674 | jae .loop_1 |
||
675 | |||
676 | ; rsize = trem; |
||
677 | |||
678 | mov edi, eax |
||
679 | jmp .loop |
||
680 | .unlink: |
||
681 | |||
682 | |||
683 | ; r = chunk_plus_offset((mchunkptr)v, nb); |
||
684 | ; unlink_large_chunk(v); |
||
685 | |||
686 | mov edx, ebx |
||
687 | lea esi, [ebx+ebp] |
||
688 | call unlink_large_chunk |
||
689 | |||
690 | ; if (rsize < 16) |
||
691 | |||
692 | cmp edi, 16 |
||
693 | jae .split |
||
694 | |||
695 | ; v->head = (rsize + nb)|PINUSE_BIT|CINUSE_BIT; |
||
696 | |||
697 | lea ecx, [edi+ebp] |
||
698 | |||
699 | ; (v+rsize + nb)->head |= PINUSE_BIT; |
||
700 | |||
701 | add edi, ebx |
||
702 | lea eax, [edi+ebp+4] |
||
703 | pop edi |
||
704 | or ecx, 3 |
||
705 | mov [ebx+4], ecx |
||
706 | or dword [eax], 1 |
||
707 | pop ebp |
||
708 | |||
709 | lea eax, [ebx+8] |
||
710 | ret |
||
711 | .split: |
||
712 | |||
713 | ; v->head = nb|PINUSE_BIT|CINUSE_BIT; |
||
714 | ; r->head = rsize|PINUSE_BIT; |
||
715 | ; (r+rsize)->prev_foot = rsize; |
||
716 | |||
717 | or ebp, 3 |
||
718 | mov edx, edi |
||
719 | or edx, 1 |
||
720 | |||
721 | cmp edi, 256 |
||
722 | mov [ebx+4], ebp |
||
723 | mov [esi+4], edx |
||
724 | mov [esi+edi], edi |
||
725 | jae .large |
||
726 | |||
727 | shr edi, 3 |
||
728 | bts [mst.smallmap], edi |
||
729 | |||
730 | mov eax, edi |
||
731 | shl eax, 4 |
||
732 | add eax, mst.smallbins |
||
733 | |||
734 | mov edx, [eax+8] |
||
735 | mov [eax+8], esi |
||
736 | mov [edx+12], esi |
||
737 | pop edi |
||
738 | mov [esi+12], eax |
||
739 | mov [esi+8], edx |
||
740 | pop ebp |
||
741 | lea eax, [ebx+8] |
||
742 | ret |
||
743 | .large: |
||
744 | lea eax, [ebx+8] |
||
745 | push eax |
||
746 | mov ebx, edi |
||
747 | call insert_large_chunk |
||
748 | pop eax |
||
749 | pop edi |
||
750 | pop ebp |
||
751 | ret |
||
752 | |||
753 | |||
754 | ; param |
||
755 | ; esi= nb |
||
756 | |||
757 | align 4 |
||
758 | malloc_large: |
||
759 | .idx equ esp+4 |
||
760 | .rst equ esp |
||
761 | |||
762 | push ebp |
||
763 | push edi |
||
764 | sub esp, 8 |
||
765 | ; v = 0; |
||
766 | ; rsize = -nb; |
||
767 | |||
768 | mov edi, esi |
||
769 | mov ebx, esi |
||
770 | xor ebp, ebp |
||
771 | neg edi |
||
772 | |||
773 | ; idx = compute_tree_index(nb); |
||
774 | |||
775 | mov edx, esi |
||
776 | shr edx, 8 |
||
777 | bsr eax, edx |
||
778 | lea ecx, [eax+7] |
||
779 | shr esi, cl |
||
780 | and esi, 1 |
||
781 | lea ecx, [esi+eax*2] |
||
782 | mov [.idx], ecx |
||
783 | |||
784 | ; if ((t = ms.treebins[idx]) != 0) |
||
785 | |||
786 | mov eax, [mst.treebins+ecx*4] |
||
787 | test eax, eax |
||
788 | jz .l3 |
||
789 | |||
790 | ; sizebits = nb << leftshift_for_tree_index(idx); |
||
791 | |||
792 | cmp ecx, 31 |
||
793 | jne @F |
||
794 | xor ecx, ecx |
||
795 | jmp .l1 |
||
796 | @@: |
||
797 | mov edx, ecx |
||
798 | shr edx, 1 |
||
799 | mov ecx, 37 |
||
800 | sub ecx, edx |
||
801 | .l1: |
||
802 | mov edx, ebx |
||
803 | shl edx, cl |
||
804 | |||
805 | ; rst = 0; |
||
806 | mov [.rst], ebp |
||
807 | .loop: |
||
808 | |||
809 | ; trem = (t->head & ~INUSE_BITS) - nb; |
||
810 | |||
811 | mov ecx, [eax+4] |
||
812 | and ecx, -4 |
||
813 | sub ecx, ebx |
||
814 | |||
815 | ; if (trem < rsize) |
||
816 | |||
817 | cmp ecx, edi |
||
818 | jae @F |
||
819 | ; v = t; |
||
820 | ; if ((rsize = trem) == 0) |
||
821 | |||
822 | test ecx, ecx |
||
823 | mov ebp, eax |
||
824 | mov edi, ecx |
||
825 | je .l2 |
||
826 | @@: |
||
827 | |||
828 | ; rt = t->child[1]; |
||
829 | |||
830 | mov ecx, [eax+20] |
||
831 | |||
832 | ; t = t->child[(sizebits >> 31) & 1]; |
||
833 | |||
834 | mov esi, edx |
||
835 | shr esi, 31 |
||
836 | |||
837 | ; if (rt != 0 && rt != t) |
||
838 | |||
839 | test ecx, ecx |
||
840 | mov eax, [eax+esi*4+16] |
||
841 | jz @F |
||
842 | cmp ecx, eax |
||
843 | jz @F |
||
844 | |||
845 | ; rst = rt; |
||
846 | mov [.rst], ecx |
||
847 | @@: |
||
848 | ; if (t == 0) |
||
849 | |||
850 | test eax, eax |
||
851 | jz @F |
||
852 | |||
853 | ; sizebits <<= 1; |
||
854 | |||
855 | add edx, edx |
||
856 | jmp .loop |
||
857 | @@: |
||
858 | ; t = rst; |
||
859 | mov eax, [.rst] |
||
860 | .l2: |
||
861 | ; if (t == 0 && v == 0) |
||
862 | |||
863 | test eax, eax |
||
864 | jne .l4 |
||
865 | test ebp, ebp |
||
866 | jne .l7 |
||
867 | mov ecx, [.idx] |
||
868 | .l3: |
||
869 | |||
870 | ; leftbits = (-1< |
||
871 | ; if (leftbits != 0) |
||
872 | |||
873 | or edx, -1 |
||
874 | shl edx, cl |
||
875 | and edx, [mst.treemap] |
||
876 | jz @F |
||
877 | |||
878 | bsf eax, edx |
||
879 | ; t = ms.treebins[i]; |
||
880 | mov eax, [mst.treebins+eax*4] |
||
881 | @@: |
||
882 | |||
883 | ; while (t != 0) |
||
884 | test eax, eax |
||
885 | jz .l5 |
||
886 | .l4: |
||
887 | |||
888 | ; trem = (t->head & ~INUSE_BITS) - nb; |
||
889 | |||
890 | mov ecx, [eax+4] |
||
891 | and ecx, -4 |
||
892 | sub ecx, ebx |
||
893 | |||
894 | ; if (trem < rsize) |
||
895 | |||
896 | cmp ecx, edi |
||
897 | jae @F |
||
898 | ; rsize = trem; |
||
899 | |||
900 | mov edi, ecx |
||
901 | ; v = t; |
||
902 | mov ebp, eax |
||
903 | @@: |
||
904 | |||
905 | ; t = leftmost_child(t); |
||
906 | |||
907 | mov ecx, [eax+16] |
||
908 | test ecx, ecx |
||
909 | je @F |
||
910 | mov eax, ecx |
||
911 | jmp .l6 |
||
912 | @@: |
||
913 | mov eax, [eax+20] |
||
914 | .l6: |
||
915 | |||
916 | ; while (t != 0) |
||
917 | |||
918 | test eax, eax |
||
919 | jne .l4 |
||
920 | .l5: |
||
921 | |||
922 | ; if (v != 0) |
||
923 | |||
924 | test ebp, ebp |
||
925 | jz .done |
||
926 | .l7: |
||
927 | |||
928 | ; r = chunk_plus_offset((mchunkptr)v, nb); |
||
929 | ; unlink_large_chunk(v); |
||
930 | |||
931 | mov edx, ebp |
||
932 | lea esi, [ebx+ebp] |
||
933 | call unlink_large_chunk |
||
934 | |||
326 | serge | 935 | ; if (rsize < 16) |
276 | serge | 936 | |
326 | serge | 937 | cmp edi, 16 |
276 | serge | 938 | jae .large |
939 | |||
940 | ; v->head = (rsize + nb)|PINUSE_BIT|CINUSE_BIT; |
||
941 | |||
942 | lea ecx, [edi+ebx] |
||
943 | |||
944 | ; (v+rsize + nb)->head |= PINUSE_BIT; |
||
945 | |||
946 | add edi, ebp |
||
947 | lea eax, [edi+ebx+4] |
||
948 | or ecx, 3 |
||
949 | mov [ebp+4], ecx |
||
950 | or dword [eax], 1 |
||
951 | lea eax, [ebp+8] |
||
952 | add esp, 8 |
||
953 | pop edi |
||
954 | pop ebp |
||
955 | ret |
||
956 | .large: |
||
957 | |||
958 | ; v->head = nb|PINUSE_BIT|CINUSE_BIT; |
||
959 | ; r->head = rsize|PINUSE_BIT; |
||
960 | |||
961 | mov edx, edi |
||
962 | or ebx, 3 |
||
963 | mov [ebp+4], ebx |
||
964 | or edx, 1 |
||
965 | mov [esi+4], edx |
||
966 | |||
967 | ; (r+rsize)->prev_foot = rsize; |
||
968 | ; insert_large_chunk((tchunkptr)r, rsize); |
||
969 | |||
970 | mov [esi+edi], edi |
||
326 | serge | 971 | mov eax, edi |
972 | mov ecx, esi |
||
973 | call insert_chunk |
||
276 | serge | 974 | |
975 | lea eax, [ebp+8] |
||
976 | add esp, 8 |
||
977 | pop edi |
||
978 | pop ebp |
||
979 | ret |
||
980 | .done: |
||
981 | add esp, 8 |
||
982 | pop edi |
||
983 | pop ebp |
||
984 | xor eax, eax |
||
985 | ret |
||
986 | |||
987 | align 4 |
||
988 | init_malloc: |
||
989 | |||
1066 | serge | 990 | mov ecx, 64 |
991 | call @frame_alloc@4 |
||
864 | serge | 992 | add eax, OS_BASE |
276 | serge | 993 | |
994 | mov [mst.top], eax |
||
861 | serge | 995 | mov [mst.topsize], 256*1024 |
996 | mov dword [eax+4], (256*1024) or 1 |
||
276 | serge | 997 | mov eax, mst.smallbins |
998 | @@: |
||
999 | mov [eax+8], eax |
||
1000 | mov [eax+12], eax |
||
1001 | add eax, 16 |
||
1002 | cmp eax, mst.smallbins+512 |
||
465 | serge | 1003 | jb @B |
276 | serge | 1004 | |
1005 | ret>> |
||
1006 | |||
1007 | |||
1008 | |||
1009 |