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Rev | Author | Line No. | Line |
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214 | serge | 1 | |
2 | clts |
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3 | fninit |
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4 | |||
5 | |||
221 | serge | 6 | jnc .no_SSE |
7 | |||
214 | serge | 8 | |
9 | mov [fpu_data], eax |
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10 | |||
11 | |||
12 | mov ecx, cr0 |
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13 | or ebx, CR4_OSFXSR+CR4_OSXMMEXPT |
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14 | mov cr4, ebx |
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15 | |||
16 | |||
17 | or ecx, CR0_NE |
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18 | mov cr0, ecx |
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19 | |||
20 | |||
21 | ldmxcsr [esp-4] |
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22 | |||
23 | |||
24 | xorps xmm1, xmm1 |
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25 | xorps xmm2, xmm2 |
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26 | xorps xmm3, xmm3 |
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27 | xorps xmm4, xmm4 |
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28 | xorps xmm5, xmm5 |
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29 | xorps xmm6, xmm6 |
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30 | xorps xmm7, xmm7 |
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31 | fxsave [eax] |
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32 | ret |
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33 | .no_SSE: |
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221 | serge | 34 | stdcall kernel_alloc, 112*256 |
214 | serge | 35 | mov [fpu_data], eax |
36 | mov ecx, cr0 |
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37 | and ecx, not CR0_EM |
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38 | or ecx, CR0_MP+CR0_NE |
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39 | mov cr0, ecx |
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40 | fnsave [eax] |
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41 | ret |
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42 | |||
43 | |||
44 | proc fpu_save |
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45 | clts |
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46 | mov ebx, [fpu_owner] |
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47 | shl ebx, 8 |
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48 | mov eax, [ebx+PROC_BASE+0x10] |
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49 | mov ebx, [CURRENT_TASK] |
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50 | mov [fpu_owner], ebx |
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51 | |||
52 | |||
221 | serge | 53 | jnc .no_SSE |
214 | serge | 54 | |
55 | |||
56 | fninit ;re-init fpu |
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57 | ret |
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58 | .no_SSE: |
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59 | fnsave [eax] |
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60 | ret |
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61 | endp |
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62 | |||
63 | |||
64 | proc fpu_restore |
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65 | mov ebx, [CURRENT_TASK] |
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66 | shl ebx, 8 |
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67 | mov eax, [ebx+PROC_BASE+0x10] |
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68 | bt [cpu_caps], CAPS_SSE |
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221 | serge | 69 | jnc .no_SSE |
214 | serge | 70 | |
71 | |||
72 | ret |
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73 | .no_SSE: |
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74 | fnclex ;fix possible problems |
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75 | frstor [eax] |
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76 | ret |
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77 | endp |
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78 | |||
79 | |||
80 | e7: ;#NM exception handler |
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81 | save_ring3_context |
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82 | clts |
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83 | mov ax, os_data |
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84 | mov ds, ax |
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85 | mov es, ax |
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86 | |||
87 | |||
88 | cmp ebx, [CURRENT_TASK] |
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89 | je .exit |
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90 | |||
91 | |||
92 | mov eax, [ebx+PROC_BASE+APPDATA.fpu_state] |
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93 | bt [cpu_caps], CAPS_SSE |
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221 | serge | 94 | jnc .no_SSE |
214 | serge | 95 | |
96 | |||
97 | mov ebx, [CURRENT_TASK] |
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98 | mov [fpu_owner], ebx |
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99 | shl ebx, 8 |
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100 | mov eax, [ebx+PROC_BASE+APPDATA.fpu_state] |
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101 | fxrstor [eax] |
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102 | .exit: |
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103 | restore_ring3_context |
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104 | iret |
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105 | |||
106 | |||
107 | fnsave [eax] |
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108 | mov ebx, [CURRENT_TASK] |
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109 | mov [fpu_owner], ebx |
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110 | shl ebx, 8 |
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111 | mov eax, [ebx+PROC_BASE+APPDATA.fpu_state] |
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112 | frstor [eax] |
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113 | restore_ring3_context |
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114 | iret |
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115 | |||
116 | |||
117 | fpu_owner dd 1 |
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118 | endg |
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119 | |||
120 | |||
121 | |||
122 | |||
123 | reg_cs equ ebp+8 |
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124 | reg_eflags equ ebp+12 |
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125 | reg_esp equ ebp+16 |
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126 | reg_ss equ ebp+20 |
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127 | |||
128 | |||
129 | except_16: ;fpu native exceptions handler |
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130 | push ebp |
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131 | mov ebp, esp |
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132 | |||
133 | |||
134 | push ebx |
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135 | push ecx |
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136 | push edx |
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137 | |||
138 | |||
139 | shl ebx, 8 |
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140 | |||
141 | |||
142 | test eax, eax |
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143 | jz .default |
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144 | |||
145 | |||
146 | mov edx, [reg_esp] |
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147 | sub edx, 4 |
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148 | mov [ss:edx+new_app_base], ecx |
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149 | mov [reg_esp], edx |
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150 | mov dword [reg_eip], eax |
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151 | |||
152 | |||
153 | pop ecx |
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154 | pop ebx |
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155 | pop eax |
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156 | |||
157 | |||
158 | iretd |
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159 | |||
160 | |||
161 | pop edx |
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162 | pop ecx |
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163 | pop ebx |
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164 | pop eax |
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165 | leave |
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166 | |||
167 | |||
168 | |||
169 | |||
170 | jmp exc_c |
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171 | |||
172 | |||
173 | except_19: ;sse exceptions handler |
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174 | push ebp |
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175 | mov ebp, esp |
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176 | |||
177 | |||
178 | push ebx |
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179 | push ecx |
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180 | push edx |
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181 | |||
182 | |||
183 | shl ebx, 8 |
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184 | |||
185 | |||
186 | test eax, eax |
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187 | jz .default |
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188 | |||
189 | |||
190 | mov edx, [reg_esp] |
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191 | sub edx, 4 |
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192 | mov [ss:edx+new_app_base], ecx |
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193 | mov [reg_esp], edx |
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194 | mov dword [reg_eip], eax |
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195 | |||
196 | |||
197 | pop ecx |
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198 | pop ebx |
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199 | pop eax |
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200 | |||
201 | |||
202 | iretd |
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203 | |||
204 | |||
205 | pop edx |
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206 | pop ecx |
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207 | pop ebx |
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208 | pop eax |
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209 | leave |
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210 | |||
211 | |||
212 | |||
213 | |||
214 | jmp exc_c |
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215 | |||
216 | |||
217 | restore reg_cs |
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218 | restore reg_eflags |
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219 | restore reg_esp |
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220 | restore reg_ss |
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221 |