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1 | 3ec9c4fc | bellard | /*
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2 | 3ec9c4fc | bellard | * i386 helpers
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3 | 3ec9c4fc | bellard | *
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4 | 3ec9c4fc | bellard | * Copyright (c) 2003 Fabrice Bellard
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5 | 3ec9c4fc | bellard | *
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6 | 3ec9c4fc | bellard | * This library is free software; you can redistribute it and/or
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7 | 3ec9c4fc | bellard | * modify it under the terms of the GNU Lesser General Public
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8 | 3ec9c4fc | bellard | * License as published by the Free Software Foundation; either
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9 | 3ec9c4fc | bellard | * version 2 of the License, or (at your option) any later version.
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10 | 3ec9c4fc | bellard | *
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11 | 3ec9c4fc | bellard | * This library is distributed in the hope that it will be useful,
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12 | 3ec9c4fc | bellard | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | 3ec9c4fc | bellard | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 | 3ec9c4fc | bellard | * Lesser General Public License for more details.
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15 | 3ec9c4fc | bellard | *
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16 | 3ec9c4fc | bellard | * You should have received a copy of the GNU Lesser General Public
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17 | 3ec9c4fc | bellard | * License along with this library; if not, write to the Free Software
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18 | 3ec9c4fc | bellard | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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19 | 3ec9c4fc | bellard | */
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20 | 3ec9c4fc | bellard | #include "exec-i386.h" |
21 | 3ec9c4fc | bellard | |
22 | 1e5ffbed | bellard | const uint8_t parity_table[256] = { |
23 | 1e5ffbed | bellard | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
24 | 1e5ffbed | bellard | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
25 | 1e5ffbed | bellard | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
26 | 1e5ffbed | bellard | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
27 | 1e5ffbed | bellard | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
28 | 1e5ffbed | bellard | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
29 | 1e5ffbed | bellard | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
30 | 1e5ffbed | bellard | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
31 | 1e5ffbed | bellard | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
32 | 1e5ffbed | bellard | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
33 | 1e5ffbed | bellard | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
34 | 1e5ffbed | bellard | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
35 | 1e5ffbed | bellard | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
36 | 1e5ffbed | bellard | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
37 | 1e5ffbed | bellard | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
38 | 1e5ffbed | bellard | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
39 | 1e5ffbed | bellard | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
40 | 1e5ffbed | bellard | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
41 | 1e5ffbed | bellard | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
42 | 1e5ffbed | bellard | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
43 | 1e5ffbed | bellard | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
44 | 1e5ffbed | bellard | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
45 | 1e5ffbed | bellard | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
46 | 1e5ffbed | bellard | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
47 | 1e5ffbed | bellard | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
48 | 1e5ffbed | bellard | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
49 | 1e5ffbed | bellard | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
50 | 1e5ffbed | bellard | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
51 | 1e5ffbed | bellard | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
52 | 1e5ffbed | bellard | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
53 | 1e5ffbed | bellard | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
54 | 1e5ffbed | bellard | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
55 | 1e5ffbed | bellard | }; |
56 | 1e5ffbed | bellard | |
57 | 1e5ffbed | bellard | /* modulo 17 table */
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58 | 1e5ffbed | bellard | const uint8_t rclw_table[32] = { |
59 | 1e5ffbed | bellard | 0, 1, 2, 3, 4, 5, 6, 7, |
60 | 1e5ffbed | bellard | 8, 9,10,11,12,13,14,15, |
61 | 1e5ffbed | bellard | 16, 0, 1, 2, 3, 4, 5, 6, |
62 | 1e5ffbed | bellard | 7, 8, 9,10,11,12,13,14, |
63 | 1e5ffbed | bellard | }; |
64 | 1e5ffbed | bellard | |
65 | 1e5ffbed | bellard | /* modulo 9 table */
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66 | 1e5ffbed | bellard | const uint8_t rclb_table[32] = { |
67 | 1e5ffbed | bellard | 0, 1, 2, 3, 4, 5, 6, 7, |
68 | 1e5ffbed | bellard | 8, 0, 1, 2, 3, 4, 5, 6, |
69 | 1e5ffbed | bellard | 7, 8, 0, 1, 2, 3, 4, 5, |
70 | 1e5ffbed | bellard | 6, 7, 8, 0, 1, 2, 3, 4, |
71 | 1e5ffbed | bellard | }; |
72 | 1e5ffbed | bellard | |
73 | 2d0e9143 | bellard | const CPU86_LDouble f15rk[7] = |
74 | 2d0e9143 | bellard | { |
75 | 2d0e9143 | bellard | 0.00000000000000000000L, |
76 | 2d0e9143 | bellard | 1.00000000000000000000L, |
77 | 2d0e9143 | bellard | 3.14159265358979323851L, /*pi*/ |
78 | 2d0e9143 | bellard | 0.30102999566398119523L, /*lg2*/ |
79 | 2d0e9143 | bellard | 0.69314718055994530943L, /*ln2*/ |
80 | 2d0e9143 | bellard | 1.44269504088896340739L, /*l2e*/ |
81 | 2d0e9143 | bellard | 3.32192809488736234781L, /*l2t*/ |
82 | 2d0e9143 | bellard | }; |
83 | 2d0e9143 | bellard | |
84 | 2d0e9143 | bellard | /* thread support */
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85 | 2d0e9143 | bellard | |
86 | 2d0e9143 | bellard | spinlock_t global_cpu_lock = SPIN_LOCK_UNLOCKED; |
87 | 2d0e9143 | bellard | |
88 | 2d0e9143 | bellard | void cpu_lock(void) |
89 | 2d0e9143 | bellard | { |
90 | 2d0e9143 | bellard | spin_lock(&global_cpu_lock); |
91 | 2d0e9143 | bellard | } |
92 | 2d0e9143 | bellard | |
93 | 2d0e9143 | bellard | void cpu_unlock(void) |
94 | 2d0e9143 | bellard | { |
95 | 2d0e9143 | bellard | spin_unlock(&global_cpu_lock); |
96 | 2d0e9143 | bellard | } |
97 | 2d0e9143 | bellard | |
98 | 2d0e9143 | bellard | void cpu_loop_exit(void) |
99 | 2d0e9143 | bellard | { |
100 | 2d0e9143 | bellard | /* NOTE: the register at this point must be saved by hand because
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101 | 2d0e9143 | bellard | longjmp restore them */
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102 | 2d0e9143 | bellard | #ifdef reg_EAX
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103 | 2d0e9143 | bellard | env->regs[R_EAX] = EAX; |
104 | 2d0e9143 | bellard | #endif
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105 | 2d0e9143 | bellard | #ifdef reg_ECX
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106 | 2d0e9143 | bellard | env->regs[R_ECX] = ECX; |
107 | 2d0e9143 | bellard | #endif
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108 | 2d0e9143 | bellard | #ifdef reg_EDX
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109 | 2d0e9143 | bellard | env->regs[R_EDX] = EDX; |
110 | 2d0e9143 | bellard | #endif
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111 | 2d0e9143 | bellard | #ifdef reg_EBX
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112 | 2d0e9143 | bellard | env->regs[R_EBX] = EBX; |
113 | 2d0e9143 | bellard | #endif
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114 | 2d0e9143 | bellard | #ifdef reg_ESP
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115 | 2d0e9143 | bellard | env->regs[R_ESP] = ESP; |
116 | 2d0e9143 | bellard | #endif
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117 | 2d0e9143 | bellard | #ifdef reg_EBP
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118 | 2d0e9143 | bellard | env->regs[R_EBP] = EBP; |
119 | 2d0e9143 | bellard | #endif
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120 | 2d0e9143 | bellard | #ifdef reg_ESI
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121 | 2d0e9143 | bellard | env->regs[R_ESI] = ESI; |
122 | 2d0e9143 | bellard | #endif
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123 | 2d0e9143 | bellard | #ifdef reg_EDI
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124 | 2d0e9143 | bellard | env->regs[R_EDI] = EDI; |
125 | 2d0e9143 | bellard | #endif
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126 | 2d0e9143 | bellard | longjmp(env->jmp_env, 1);
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127 | 2d0e9143 | bellard | } |
128 | 2d0e9143 | bellard | |
129 | 90a9fdae | bellard | static inline void get_ss_esp_from_tss(uint32_t *ss_ptr, |
130 | 90a9fdae | bellard | uint32_t *esp_ptr, int dpl)
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131 | 90a9fdae | bellard | { |
132 | 90a9fdae | bellard | int type, index, shift;
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133 | 90a9fdae | bellard | |
134 | 3ec9c4fc | bellard | #if 0
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135 | 90a9fdae | bellard | {
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136 | 90a9fdae | bellard | int i;
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137 | 90a9fdae | bellard | printf("TR: base=%p limit=%x\n", env->tr.base, env->tr.limit);
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138 | 90a9fdae | bellard | for(i=0;i<env->tr.limit;i++) {
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139 | 90a9fdae | bellard | printf("%02x ", env->tr.base[i]);
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140 | 90a9fdae | bellard | if ((i & 7) == 7) printf("\n");
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141 | 90a9fdae | bellard | }
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142 | 90a9fdae | bellard | printf("\n");
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143 | 90a9fdae | bellard | }
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144 | 90a9fdae | bellard | #endif
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145 | 90a9fdae | bellard | |
146 | 90a9fdae | bellard | if (!(env->tr.flags & DESC_P_MASK))
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147 | 90a9fdae | bellard | cpu_abort(env, "invalid tss");
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148 | 90a9fdae | bellard | type = (env->tr.flags >> DESC_TYPE_SHIFT) & 0xf;
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149 | 90a9fdae | bellard | if ((type & 7) != 1) |
150 | 90a9fdae | bellard | cpu_abort(env, "invalid tss type");
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151 | 90a9fdae | bellard | shift = type >> 3;
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152 | 90a9fdae | bellard | index = (dpl * 4 + 2) << shift; |
153 | 90a9fdae | bellard | if (index + (4 << shift) - 1 > env->tr.limit) |
154 | 90a9fdae | bellard | raise_exception_err(EXCP0A_TSS, env->tr.selector & 0xfffc);
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155 | 90a9fdae | bellard | if (shift == 0) { |
156 | 90a9fdae | bellard | *esp_ptr = lduw(env->tr.base + index); |
157 | 90a9fdae | bellard | *ss_ptr = lduw(env->tr.base + index + 2);
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158 | 90a9fdae | bellard | } else {
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159 | 90a9fdae | bellard | *esp_ptr = ldl(env->tr.base + index); |
160 | 90a9fdae | bellard | *ss_ptr = lduw(env->tr.base + index + 4);
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161 | 90a9fdae | bellard | } |
162 | 90a9fdae | bellard | } |
163 | 90a9fdae | bellard | |
164 | 90a9fdae | bellard | /* return non zero if error */
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165 | 90a9fdae | bellard | static inline int load_segment(uint32_t *e1_ptr, uint32_t *e2_ptr, |
166 | 90a9fdae | bellard | int selector)
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167 | 3ec9c4fc | bellard | { |
168 | 90a9fdae | bellard | SegmentCache *dt; |
169 | 90a9fdae | bellard | int index;
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170 | 3ec9c4fc | bellard | uint8_t *ptr; |
171 | 90a9fdae | bellard | |
172 | 90a9fdae | bellard | if (selector & 0x4) |
173 | 90a9fdae | bellard | dt = &env->ldt; |
174 | 90a9fdae | bellard | else
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175 | 90a9fdae | bellard | dt = &env->gdt; |
176 | 90a9fdae | bellard | index = selector & ~7;
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177 | 90a9fdae | bellard | if ((index + 7) > dt->limit) |
178 | 90a9fdae | bellard | return -1; |
179 | 90a9fdae | bellard | ptr = dt->base + index; |
180 | 90a9fdae | bellard | *e1_ptr = ldl(ptr); |
181 | 90a9fdae | bellard | *e2_ptr = ldl(ptr + 4);
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182 | 90a9fdae | bellard | return 0; |
183 | 90a9fdae | bellard | } |
184 | 90a9fdae | bellard | |
185 | 90a9fdae | bellard | |
186 | 90a9fdae | bellard | /* protected mode interrupt */
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187 | 90a9fdae | bellard | static void do_interrupt_protected(int intno, int is_int, int error_code, |
188 | 2c1794c4 | bellard | unsigned int next_eip) |
189 | 90a9fdae | bellard | { |
190 | 90a9fdae | bellard | SegmentCache *dt; |
191 | 90a9fdae | bellard | uint8_t *ptr, *ssp; |
192 | 90a9fdae | bellard | int type, dpl, cpl, selector, ss_dpl;
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193 | 90a9fdae | bellard | int has_error_code, new_stack, shift;
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194 | 90a9fdae | bellard | uint32_t e1, e2, offset, ss, esp, ss_e1, ss_e2, push_size; |
195 | 90a9fdae | bellard | uint32_t old_cs, old_ss, old_esp, old_eip; |
196 | 90a9fdae | bellard | |
197 | 3ec9c4fc | bellard | dt = &env->idt; |
198 | 3ec9c4fc | bellard | if (intno * 8 + 7 > dt->limit) |
199 | 3ec9c4fc | bellard | raise_exception_err(EXCP0D_GPF, intno * 8 + 2); |
200 | 3ec9c4fc | bellard | ptr = dt->base + intno * 8;
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201 | 3ec9c4fc | bellard | e1 = ldl(ptr); |
202 | 3ec9c4fc | bellard | e2 = ldl(ptr + 4);
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203 | 3ec9c4fc | bellard | /* check gate type */
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204 | 3ec9c4fc | bellard | type = (e2 >> DESC_TYPE_SHIFT) & 0x1f;
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205 | 3ec9c4fc | bellard | switch(type) {
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206 | 3ec9c4fc | bellard | case 5: /* task gate */ |
207 | 90a9fdae | bellard | cpu_abort(env, "task gate not supported");
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208 | 90a9fdae | bellard | break;
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209 | 3ec9c4fc | bellard | case 6: /* 286 interrupt gate */ |
210 | 3ec9c4fc | bellard | case 7: /* 286 trap gate */ |
211 | 3ec9c4fc | bellard | case 14: /* 386 interrupt gate */ |
212 | 3ec9c4fc | bellard | case 15: /* 386 trap gate */ |
213 | 3ec9c4fc | bellard | break;
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214 | 3ec9c4fc | bellard | default:
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215 | 3ec9c4fc | bellard | raise_exception_err(EXCP0D_GPF, intno * 8 + 2); |
216 | 3ec9c4fc | bellard | break;
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217 | 3ec9c4fc | bellard | } |
218 | 3ec9c4fc | bellard | dpl = (e2 >> DESC_DPL_SHIFT) & 3;
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219 | a363e34c | bellard | if (env->eflags & VM_MASK)
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220 | a363e34c | bellard | cpl = 3;
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221 | a363e34c | bellard | else
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222 | a363e34c | bellard | cpl = env->segs[R_CS].selector & 3;
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223 | 3ec9c4fc | bellard | /* check privledge if software int */
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224 | 3ec9c4fc | bellard | if (is_int && dpl < cpl)
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225 | 3ec9c4fc | bellard | raise_exception_err(EXCP0D_GPF, intno * 8 + 2); |
226 | 3ec9c4fc | bellard | /* check valid bit */
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227 | 3ec9c4fc | bellard | if (!(e2 & DESC_P_MASK))
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228 | 3ec9c4fc | bellard | raise_exception_err(EXCP0B_NOSEG, intno * 8 + 2); |
229 | 90a9fdae | bellard | selector = e1 >> 16;
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230 | 90a9fdae | bellard | offset = (e2 & 0xffff0000) | (e1 & 0x0000ffff); |
231 | 90a9fdae | bellard | if ((selector & 0xfffc) == 0) |
232 | 90a9fdae | bellard | raise_exception_err(EXCP0D_GPF, 0);
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233 | 90a9fdae | bellard | |
234 | 90a9fdae | bellard | if (load_segment(&e1, &e2, selector) != 0) |
235 | 90a9fdae | bellard | raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
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236 | 90a9fdae | bellard | if (!(e2 & DESC_S_MASK) || !(e2 & (DESC_CS_MASK)))
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237 | 90a9fdae | bellard | raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
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238 | 90a9fdae | bellard | dpl = (e2 >> DESC_DPL_SHIFT) & 3;
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239 | 90a9fdae | bellard | if (dpl > cpl)
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240 | 90a9fdae | bellard | raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
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241 | 90a9fdae | bellard | if (!(e2 & DESC_P_MASK))
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242 | 90a9fdae | bellard | raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc);
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243 | 90a9fdae | bellard | if (!(e2 & DESC_C_MASK) && dpl < cpl) {
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244 | 90a9fdae | bellard | /* to inner priviledge */
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245 | 90a9fdae | bellard | get_ss_esp_from_tss(&ss, &esp, dpl); |
246 | 90a9fdae | bellard | if ((ss & 0xfffc) == 0) |
247 | 90a9fdae | bellard | raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
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248 | 90a9fdae | bellard | if ((ss & 3) != dpl) |
249 | 90a9fdae | bellard | raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
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250 | 90a9fdae | bellard | if (load_segment(&ss_e1, &ss_e2, ss) != 0) |
251 | 90a9fdae | bellard | raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
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252 | 90a9fdae | bellard | ss_dpl = (ss_e2 >> DESC_DPL_SHIFT) & 3;
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253 | 90a9fdae | bellard | if (ss_dpl != dpl)
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254 | 90a9fdae | bellard | raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
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255 | 90a9fdae | bellard | if (!(ss_e2 & DESC_S_MASK) ||
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256 | 90a9fdae | bellard | (ss_e2 & DESC_CS_MASK) || |
257 | 90a9fdae | bellard | !(ss_e2 & DESC_W_MASK)) |
258 | 90a9fdae | bellard | raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
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259 | 90a9fdae | bellard | if (!(ss_e2 & DESC_P_MASK))
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260 | 90a9fdae | bellard | raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
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261 | 90a9fdae | bellard | new_stack = 1;
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262 | 90a9fdae | bellard | } else if ((e2 & DESC_C_MASK) || dpl == cpl) { |
263 | 90a9fdae | bellard | /* to same priviledge */
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264 | 90a9fdae | bellard | new_stack = 0;
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265 | 90a9fdae | bellard | } else {
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266 | 90a9fdae | bellard | raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
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267 | 90a9fdae | bellard | new_stack = 0; /* avoid warning */ |
268 | 90a9fdae | bellard | } |
269 | 90a9fdae | bellard | |
270 | 90a9fdae | bellard | shift = type >> 3;
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271 | 90a9fdae | bellard | has_error_code = 0;
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272 | 90a9fdae | bellard | if (!is_int) {
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273 | 90a9fdae | bellard | switch(intno) {
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274 | 90a9fdae | bellard | case 8: |
275 | 90a9fdae | bellard | case 10: |
276 | 90a9fdae | bellard | case 11: |
277 | 90a9fdae | bellard | case 12: |
278 | 90a9fdae | bellard | case 13: |
279 | 90a9fdae | bellard | case 14: |
280 | 90a9fdae | bellard | case 17: |
281 | 90a9fdae | bellard | has_error_code = 1;
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282 | 90a9fdae | bellard | break;
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283 | 90a9fdae | bellard | } |
284 | 90a9fdae | bellard | } |
285 | 90a9fdae | bellard | push_size = 6 + (new_stack << 2) + (has_error_code << 1); |
286 | 90a9fdae | bellard | if (env->eflags & VM_MASK)
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287 | 90a9fdae | bellard | push_size += 8;
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288 | 90a9fdae | bellard | push_size <<= shift; |
289 | 90a9fdae | bellard | |
290 | 90a9fdae | bellard | /* XXX: check that enough room is available */
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291 | 90a9fdae | bellard | if (new_stack) {
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292 | 90a9fdae | bellard | old_esp = env->regs[R_ESP]; |
293 | 90a9fdae | bellard | old_ss = env->segs[R_SS].selector; |
294 | 90a9fdae | bellard | load_seg(R_SS, ss, env->eip); |
295 | 90a9fdae | bellard | } else {
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296 | 90a9fdae | bellard | old_esp = 0;
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297 | 90a9fdae | bellard | old_ss = 0;
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298 | 90a9fdae | bellard | esp = env->regs[R_ESP]; |
299 | 90a9fdae | bellard | } |
300 | 90a9fdae | bellard | if (is_int)
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301 | 90a9fdae | bellard | old_eip = next_eip; |
302 | 90a9fdae | bellard | else
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303 | 90a9fdae | bellard | old_eip = env->eip; |
304 | 90a9fdae | bellard | old_cs = env->segs[R_CS].selector; |
305 | 90a9fdae | bellard | load_seg(R_CS, selector, env->eip); |
306 | 90a9fdae | bellard | env->eip = offset; |
307 | 90a9fdae | bellard | env->regs[R_ESP] = esp - push_size; |
308 | 90a9fdae | bellard | ssp = env->segs[R_SS].base + esp; |
309 | 90a9fdae | bellard | if (shift == 1) { |
310 | 90a9fdae | bellard | int old_eflags;
|
311 | 90a9fdae | bellard | if (env->eflags & VM_MASK) {
|
312 | 90a9fdae | bellard | ssp -= 4;
|
313 | 90a9fdae | bellard | stl(ssp, env->segs[R_GS].selector); |
314 | 90a9fdae | bellard | ssp -= 4;
|
315 | 90a9fdae | bellard | stl(ssp, env->segs[R_FS].selector); |
316 | 90a9fdae | bellard | ssp -= 4;
|
317 | 90a9fdae | bellard | stl(ssp, env->segs[R_DS].selector); |
318 | 90a9fdae | bellard | ssp -= 4;
|
319 | 90a9fdae | bellard | stl(ssp, env->segs[R_ES].selector); |
320 | 90a9fdae | bellard | } |
321 | 90a9fdae | bellard | if (new_stack) {
|
322 | 90a9fdae | bellard | ssp -= 4;
|
323 | 90a9fdae | bellard | stl(ssp, old_ss); |
324 | 90a9fdae | bellard | ssp -= 4;
|
325 | 90a9fdae | bellard | stl(ssp, old_esp); |
326 | 90a9fdae | bellard | } |
327 | 90a9fdae | bellard | ssp -= 4;
|
328 | 90a9fdae | bellard | old_eflags = compute_eflags(); |
329 | 90a9fdae | bellard | stl(ssp, old_eflags); |
330 | 90a9fdae | bellard | ssp -= 4;
|
331 | 90a9fdae | bellard | stl(ssp, old_cs); |
332 | 90a9fdae | bellard | ssp -= 4;
|
333 | 90a9fdae | bellard | stl(ssp, old_eip); |
334 | 90a9fdae | bellard | if (has_error_code) {
|
335 | 90a9fdae | bellard | ssp -= 4;
|
336 | 90a9fdae | bellard | stl(ssp, error_code); |
337 | 90a9fdae | bellard | } |
338 | 90a9fdae | bellard | } else {
|
339 | 90a9fdae | bellard | if (new_stack) {
|
340 | 90a9fdae | bellard | ssp -= 2;
|
341 | 90a9fdae | bellard | stw(ssp, old_ss); |
342 | 90a9fdae | bellard | ssp -= 2;
|
343 | 90a9fdae | bellard | stw(ssp, old_esp); |
344 | 90a9fdae | bellard | } |
345 | 90a9fdae | bellard | ssp -= 2;
|
346 | 90a9fdae | bellard | stw(ssp, compute_eflags()); |
347 | 90a9fdae | bellard | ssp -= 2;
|
348 | 90a9fdae | bellard | stw(ssp, old_cs); |
349 | 90a9fdae | bellard | ssp -= 2;
|
350 | 90a9fdae | bellard | stw(ssp, old_eip); |
351 | 90a9fdae | bellard | if (has_error_code) {
|
352 | 90a9fdae | bellard | ssp -= 2;
|
353 | 90a9fdae | bellard | stw(ssp, error_code); |
354 | 90a9fdae | bellard | } |
355 | 90a9fdae | bellard | } |
356 | 90a9fdae | bellard | |
357 | 90a9fdae | bellard | /* interrupt gate clear IF mask */
|
358 | 90a9fdae | bellard | if ((type & 1) == 0) { |
359 | 90a9fdae | bellard | env->eflags &= ~IF_MASK; |
360 | 90a9fdae | bellard | } |
361 | 90a9fdae | bellard | env->eflags &= ~(TF_MASK | VM_MASK | RF_MASK | NT_MASK); |
362 | 3ec9c4fc | bellard | } |
363 | 3ec9c4fc | bellard | |
364 | 90a9fdae | bellard | /* real mode interrupt */
|
365 | 90a9fdae | bellard | static void do_interrupt_real(int intno, int is_int, int error_code, |
366 | 90a9fdae | bellard | unsigned int next_eip) |
367 | 90a9fdae | bellard | { |
368 | 90a9fdae | bellard | SegmentCache *dt; |
369 | 90a9fdae | bellard | uint8_t *ptr, *ssp; |
370 | 90a9fdae | bellard | int selector;
|
371 | 90a9fdae | bellard | uint32_t offset, esp; |
372 | 90a9fdae | bellard | uint32_t old_cs, old_eip; |
373 | 3ec9c4fc | bellard | |
374 | 90a9fdae | bellard | /* real mode (simpler !) */
|
375 | 90a9fdae | bellard | dt = &env->idt; |
376 | 90a9fdae | bellard | if (intno * 4 + 3 > dt->limit) |
377 | 90a9fdae | bellard | raise_exception_err(EXCP0D_GPF, intno * 8 + 2); |
378 | 90a9fdae | bellard | ptr = dt->base + intno * 4;
|
379 | 90a9fdae | bellard | offset = lduw(ptr); |
380 | 90a9fdae | bellard | selector = lduw(ptr + 2);
|
381 | 2c1794c4 | bellard | esp = env->regs[R_ESP]; |
382 | 2c1794c4 | bellard | ssp = env->segs[R_SS].base; |
383 | 90a9fdae | bellard | if (is_int)
|
384 | 90a9fdae | bellard | old_eip = next_eip; |
385 | 90a9fdae | bellard | else
|
386 | 90a9fdae | bellard | old_eip = env->eip; |
387 | 90a9fdae | bellard | old_cs = env->segs[R_CS].selector; |
388 | 2c1794c4 | bellard | esp -= 2;
|
389 | 2c1794c4 | bellard | stw(ssp + (esp & 0xffff), compute_eflags());
|
390 | 2c1794c4 | bellard | esp -= 2;
|
391 | 2c1794c4 | bellard | stw(ssp + (esp & 0xffff), old_cs);
|
392 | 2c1794c4 | bellard | esp -= 2;
|
393 | 2c1794c4 | bellard | stw(ssp + (esp & 0xffff), old_eip);
|
394 | 90a9fdae | bellard | |
395 | 90a9fdae | bellard | /* update processor state */
|
396 | 90a9fdae | bellard | env->regs[R_ESP] = (env->regs[R_ESP] & ~0xffff) | (esp & 0xffff); |
397 | 90a9fdae | bellard | env->eip = offset; |
398 | 90a9fdae | bellard | env->segs[R_CS].selector = selector; |
399 | 90a9fdae | bellard | env->segs[R_CS].base = (uint8_t *)(selector << 4);
|
400 | 90a9fdae | bellard | env->eflags &= ~(IF_MASK | TF_MASK | AC_MASK | RF_MASK); |
401 | 90a9fdae | bellard | } |
402 | 90a9fdae | bellard | |
403 | 90a9fdae | bellard | /* fake user mode interrupt */
|
404 | 90a9fdae | bellard | void do_interrupt_user(int intno, int is_int, int error_code, |
405 | 90a9fdae | bellard | unsigned int next_eip) |
406 | 3ec9c4fc | bellard | { |
407 | d8bc1fd0 | bellard | SegmentCache *dt; |
408 | 3ec9c4fc | bellard | uint8_t *ptr; |
409 | 3ec9c4fc | bellard | int dpl, cpl;
|
410 | 3ec9c4fc | bellard | uint32_t e2; |
411 | 3ec9c4fc | bellard | |
412 | 3ec9c4fc | bellard | dt = &env->idt; |
413 | 3ec9c4fc | bellard | ptr = dt->base + (intno * 8);
|
414 | 3ec9c4fc | bellard | e2 = ldl(ptr + 4);
|
415 | 3ec9c4fc | bellard | |
416 | 3ec9c4fc | bellard | dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
417 | 3ec9c4fc | bellard | cpl = 3;
|
418 | 3ec9c4fc | bellard | /* check privledge if software int */
|
419 | 3ec9c4fc | bellard | if (is_int && dpl < cpl)
|
420 | 3ec9c4fc | bellard | raise_exception_err(EXCP0D_GPF, intno * 8 + 2); |
421 | 3ec9c4fc | bellard | |
422 | 3ec9c4fc | bellard | /* Since we emulate only user space, we cannot do more than
|
423 | 3ec9c4fc | bellard | exiting the emulation with the suitable exception and error
|
424 | 3ec9c4fc | bellard | code */
|
425 | 3ec9c4fc | bellard | if (is_int)
|
426 | 3ec9c4fc | bellard | EIP = next_eip; |
427 | 90a9fdae | bellard | } |
428 | 90a9fdae | bellard | |
429 | 90a9fdae | bellard | /*
|
430 | 90a9fdae | bellard | * Begin excution of an interruption. is_int is TRUE if coming from
|
431 | 90a9fdae | bellard | * the int instruction. next_eip is the EIP value AFTER the interrupt
|
432 | 90a9fdae | bellard | * instruction. It is only relevant if is_int is TRUE.
|
433 | 90a9fdae | bellard | */
|
434 | 90a9fdae | bellard | void do_interrupt(int intno, int is_int, int error_code, |
435 | 90a9fdae | bellard | unsigned int next_eip) |
436 | 90a9fdae | bellard | { |
437 | 90a9fdae | bellard | if (env->cr[0] & CR0_PE_MASK) { |
438 | 90a9fdae | bellard | do_interrupt_protected(intno, is_int, error_code, next_eip); |
439 | 90a9fdae | bellard | } else {
|
440 | 90a9fdae | bellard | do_interrupt_real(intno, is_int, error_code, next_eip); |
441 | 90a9fdae | bellard | } |
442 | 90a9fdae | bellard | } |
443 | 90a9fdae | bellard | |
444 | 90a9fdae | bellard | /*
|
445 | 90a9fdae | bellard | * Signal an interruption. It is executed in the main CPU loop.
|
446 | 90a9fdae | bellard | * is_int is TRUE if coming from the int instruction. next_eip is the
|
447 | 90a9fdae | bellard | * EIP value AFTER the interrupt instruction. It is only relevant if
|
448 | 90a9fdae | bellard | * is_int is TRUE.
|
449 | 90a9fdae | bellard | */
|
450 | 90a9fdae | bellard | void raise_interrupt(int intno, int is_int, int error_code, |
451 | 90a9fdae | bellard | unsigned int next_eip) |
452 | 90a9fdae | bellard | { |
453 | 3ec9c4fc | bellard | env->exception_index = intno; |
454 | 3ec9c4fc | bellard | env->error_code = error_code; |
455 | 90a9fdae | bellard | env->exception_is_int = is_int; |
456 | 90a9fdae | bellard | env->exception_next_eip = next_eip; |
457 | 3ec9c4fc | bellard | cpu_loop_exit(); |
458 | 3ec9c4fc | bellard | } |
459 | 3ec9c4fc | bellard | |
460 | 3ec9c4fc | bellard | /* shortcuts to generate exceptions */
|
461 | 3ec9c4fc | bellard | void raise_exception_err(int exception_index, int error_code) |
462 | 3ec9c4fc | bellard | { |
463 | 3ec9c4fc | bellard | raise_interrupt(exception_index, 0, error_code, 0); |
464 | 3ec9c4fc | bellard | } |
465 | 3ec9c4fc | bellard | |
466 | 3ec9c4fc | bellard | void raise_exception(int exception_index) |
467 | 3ec9c4fc | bellard | { |
468 | 3ec9c4fc | bellard | raise_interrupt(exception_index, 0, 0, 0); |
469 | 3ec9c4fc | bellard | } |
470 | 3ec9c4fc | bellard | |
471 | 2d0e9143 | bellard | #ifdef BUGGY_GCC_DIV64
|
472 | 2d0e9143 | bellard | /* gcc 2.95.4 on PowerPC does not seem to like using __udivdi3, so we
|
473 | 2d0e9143 | bellard | call it from another function */
|
474 | 2d0e9143 | bellard | uint32_t div64(uint32_t *q_ptr, uint64_t num, uint32_t den) |
475 | 2d0e9143 | bellard | { |
476 | 2d0e9143 | bellard | *q_ptr = num / den; |
477 | 2d0e9143 | bellard | return num % den;
|
478 | 2d0e9143 | bellard | } |
479 | 2d0e9143 | bellard | |
480 | 2d0e9143 | bellard | int32_t idiv64(int32_t *q_ptr, int64_t num, int32_t den) |
481 | 2d0e9143 | bellard | { |
482 | 2d0e9143 | bellard | *q_ptr = num / den; |
483 | 2d0e9143 | bellard | return num % den;
|
484 | 2d0e9143 | bellard | } |
485 | 2d0e9143 | bellard | #endif
|
486 | 2d0e9143 | bellard | |
487 | 2d0e9143 | bellard | void helper_divl_EAX_T0(uint32_t eip)
|
488 | 2d0e9143 | bellard | { |
489 | 2d0e9143 | bellard | unsigned int den, q, r; |
490 | 2d0e9143 | bellard | uint64_t num; |
491 | 2d0e9143 | bellard | |
492 | 2d0e9143 | bellard | num = EAX | ((uint64_t)EDX << 32);
|
493 | 2d0e9143 | bellard | den = T0; |
494 | 2d0e9143 | bellard | if (den == 0) { |
495 | 2d0e9143 | bellard | EIP = eip; |
496 | 2d0e9143 | bellard | raise_exception(EXCP00_DIVZ); |
497 | 2d0e9143 | bellard | } |
498 | 2d0e9143 | bellard | #ifdef BUGGY_GCC_DIV64
|
499 | 2d0e9143 | bellard | r = div64(&q, num, den); |
500 | 2d0e9143 | bellard | #else
|
501 | 2d0e9143 | bellard | q = (num / den); |
502 | 2d0e9143 | bellard | r = (num % den); |
503 | 2d0e9143 | bellard | #endif
|
504 | 2d0e9143 | bellard | EAX = q; |
505 | 2d0e9143 | bellard | EDX = r; |
506 | 2d0e9143 | bellard | } |
507 | 2d0e9143 | bellard | |
508 | 2d0e9143 | bellard | void helper_idivl_EAX_T0(uint32_t eip)
|
509 | 2d0e9143 | bellard | { |
510 | 2d0e9143 | bellard | int den, q, r;
|
511 | 2d0e9143 | bellard | int64_t num; |
512 | 2d0e9143 | bellard | |
513 | 2d0e9143 | bellard | num = EAX | ((uint64_t)EDX << 32);
|
514 | 2d0e9143 | bellard | den = T0; |
515 | 2d0e9143 | bellard | if (den == 0) { |
516 | 2d0e9143 | bellard | EIP = eip; |
517 | 2d0e9143 | bellard | raise_exception(EXCP00_DIVZ); |
518 | 2d0e9143 | bellard | } |
519 | 2d0e9143 | bellard | #ifdef BUGGY_GCC_DIV64
|
520 | 2d0e9143 | bellard | r = idiv64(&q, num, den); |
521 | 2d0e9143 | bellard | #else
|
522 | 2d0e9143 | bellard | q = (num / den); |
523 | 2d0e9143 | bellard | r = (num % den); |
524 | 2d0e9143 | bellard | #endif
|
525 | 2d0e9143 | bellard | EAX = q; |
526 | 2d0e9143 | bellard | EDX = r; |
527 | 2d0e9143 | bellard | } |
528 | 2d0e9143 | bellard | |
529 | 2d0e9143 | bellard | void helper_cmpxchg8b(void) |
530 | 2d0e9143 | bellard | { |
531 | 2d0e9143 | bellard | uint64_t d; |
532 | 2d0e9143 | bellard | int eflags;
|
533 | 2d0e9143 | bellard | |
534 | 2d0e9143 | bellard | eflags = cc_table[CC_OP].compute_all(); |
535 | 2d0e9143 | bellard | d = ldq((uint8_t *)A0); |
536 | 2d0e9143 | bellard | if (d == (((uint64_t)EDX << 32) | EAX)) { |
537 | 2d0e9143 | bellard | stq((uint8_t *)A0, ((uint64_t)ECX << 32) | EBX);
|
538 | 2d0e9143 | bellard | eflags |= CC_Z; |
539 | 2d0e9143 | bellard | } else {
|
540 | 2d0e9143 | bellard | EDX = d >> 32;
|
541 | 2d0e9143 | bellard | EAX = d; |
542 | 2d0e9143 | bellard | eflags &= ~CC_Z; |
543 | 2d0e9143 | bellard | } |
544 | 2d0e9143 | bellard | CC_SRC = eflags; |
545 | 2d0e9143 | bellard | } |
546 | 2d0e9143 | bellard | |
547 | 3ec9c4fc | bellard | /* We simulate a pre-MMX pentium as in valgrind */
|
548 | 3ec9c4fc | bellard | #define CPUID_FP87 (1 << 0) |
549 | 3ec9c4fc | bellard | #define CPUID_VME (1 << 1) |
550 | 3ec9c4fc | bellard | #define CPUID_DE (1 << 2) |
551 | 3ec9c4fc | bellard | #define CPUID_PSE (1 << 3) |
552 | 3ec9c4fc | bellard | #define CPUID_TSC (1 << 4) |
553 | 3ec9c4fc | bellard | #define CPUID_MSR (1 << 5) |
554 | 3ec9c4fc | bellard | #define CPUID_PAE (1 << 6) |
555 | 3ec9c4fc | bellard | #define CPUID_MCE (1 << 7) |
556 | 3ec9c4fc | bellard | #define CPUID_CX8 (1 << 8) |
557 | 3ec9c4fc | bellard | #define CPUID_APIC (1 << 9) |
558 | 3ec9c4fc | bellard | #define CPUID_SEP (1 << 11) /* sysenter/sysexit */ |
559 | 3ec9c4fc | bellard | #define CPUID_MTRR (1 << 12) |
560 | 3ec9c4fc | bellard | #define CPUID_PGE (1 << 13) |
561 | 3ec9c4fc | bellard | #define CPUID_MCA (1 << 14) |
562 | 3ec9c4fc | bellard | #define CPUID_CMOV (1 << 15) |
563 | 3ec9c4fc | bellard | /* ... */
|
564 | 3ec9c4fc | bellard | #define CPUID_MMX (1 << 23) |
565 | 3ec9c4fc | bellard | #define CPUID_FXSR (1 << 24) |
566 | 3ec9c4fc | bellard | #define CPUID_SSE (1 << 25) |
567 | 3ec9c4fc | bellard | #define CPUID_SSE2 (1 << 26) |
568 | 3ec9c4fc | bellard | |
569 | 3ec9c4fc | bellard | void helper_cpuid(void) |
570 | 3ec9c4fc | bellard | { |
571 | 3ec9c4fc | bellard | if (EAX == 0) { |
572 | 3ec9c4fc | bellard | EAX = 1; /* max EAX index supported */ |
573 | 3ec9c4fc | bellard | EBX = 0x756e6547;
|
574 | 3ec9c4fc | bellard | ECX = 0x6c65746e;
|
575 | 3ec9c4fc | bellard | EDX = 0x49656e69;
|
576 | 3ec9c4fc | bellard | } else if (EAX == 1) { |
577 | a363e34c | bellard | int family, model, stepping;
|
578 | 3ec9c4fc | bellard | /* EAX = 1 info */
|
579 | a363e34c | bellard | #if 0
|
580 | a363e34c | bellard | /* pentium 75-200 */
|
581 | a363e34c | bellard | family = 5;
|
582 | a363e34c | bellard | model = 2;
|
583 | a363e34c | bellard | stepping = 11;
|
584 | a363e34c | bellard | #else
|
585 | a363e34c | bellard | /* pentium pro */
|
586 | a363e34c | bellard | family = 6;
|
587 | a363e34c | bellard | model = 1;
|
588 | a363e34c | bellard | stepping = 3;
|
589 | a363e34c | bellard | #endif
|
590 | a363e34c | bellard | EAX = (family << 8) | (model << 4) | stepping; |
591 | 3ec9c4fc | bellard | EBX = 0;
|
592 | 3ec9c4fc | bellard | ECX = 0;
|
593 | 3ec9c4fc | bellard | EDX = CPUID_FP87 | CPUID_DE | CPUID_PSE | |
594 | 3ec9c4fc | bellard | CPUID_TSC | CPUID_MSR | CPUID_MCE | |
595 | a363e34c | bellard | CPUID_CX8 | CPUID_PGE | CPUID_CMOV; |
596 | 3ec9c4fc | bellard | } |
597 | 3ec9c4fc | bellard | } |
598 | 3ec9c4fc | bellard | |
599 | d8bc1fd0 | bellard | static inline void load_seg_cache(SegmentCache *sc, uint32_t e1, uint32_t e2) |
600 | d8bc1fd0 | bellard | { |
601 | d8bc1fd0 | bellard | sc->base = (void *)((e1 >> 16) | ((e2 & 0xff) << 16) | (e2 & 0xff000000)); |
602 | d8bc1fd0 | bellard | sc->limit = (e1 & 0xffff) | (e2 & 0x000f0000); |
603 | 90a9fdae | bellard | if (e2 & DESC_G_MASK)
|
604 | d8bc1fd0 | bellard | sc->limit = (sc->limit << 12) | 0xfff; |
605 | 90a9fdae | bellard | sc->flags = e2; |
606 | d8bc1fd0 | bellard | } |
607 | d8bc1fd0 | bellard | |
608 | d8bc1fd0 | bellard | void helper_lldt_T0(void) |
609 | d8bc1fd0 | bellard | { |
610 | d8bc1fd0 | bellard | int selector;
|
611 | d8bc1fd0 | bellard | SegmentCache *dt; |
612 | d8bc1fd0 | bellard | uint32_t e1, e2; |
613 | d8bc1fd0 | bellard | int index;
|
614 | d8bc1fd0 | bellard | uint8_t *ptr; |
615 | d8bc1fd0 | bellard | |
616 | d8bc1fd0 | bellard | selector = T0 & 0xffff;
|
617 | d8bc1fd0 | bellard | if ((selector & 0xfffc) == 0) { |
618 | d8bc1fd0 | bellard | /* XXX: NULL selector case: invalid LDT */
|
619 | d8bc1fd0 | bellard | env->ldt.base = NULL;
|
620 | d8bc1fd0 | bellard | env->ldt.limit = 0;
|
621 | d8bc1fd0 | bellard | } else {
|
622 | d8bc1fd0 | bellard | if (selector & 0x4) |
623 | d8bc1fd0 | bellard | raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
624 | d8bc1fd0 | bellard | dt = &env->gdt; |
625 | d8bc1fd0 | bellard | index = selector & ~7;
|
626 | d8bc1fd0 | bellard | if ((index + 7) > dt->limit) |
627 | d8bc1fd0 | bellard | raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
628 | d8bc1fd0 | bellard | ptr = dt->base + index; |
629 | d8bc1fd0 | bellard | e1 = ldl(ptr); |
630 | d8bc1fd0 | bellard | e2 = ldl(ptr + 4);
|
631 | d8bc1fd0 | bellard | if ((e2 & DESC_S_MASK) || ((e2 >> DESC_TYPE_SHIFT) & 0xf) != 2) |
632 | d8bc1fd0 | bellard | raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
633 | d8bc1fd0 | bellard | if (!(e2 & DESC_P_MASK))
|
634 | d8bc1fd0 | bellard | raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc);
|
635 | d8bc1fd0 | bellard | load_seg_cache(&env->ldt, e1, e2); |
636 | d8bc1fd0 | bellard | } |
637 | d8bc1fd0 | bellard | env->ldt.selector = selector; |
638 | d8bc1fd0 | bellard | } |
639 | d8bc1fd0 | bellard | |
640 | d8bc1fd0 | bellard | void helper_ltr_T0(void) |
641 | d8bc1fd0 | bellard | { |
642 | d8bc1fd0 | bellard | int selector;
|
643 | d8bc1fd0 | bellard | SegmentCache *dt; |
644 | d8bc1fd0 | bellard | uint32_t e1, e2; |
645 | d8bc1fd0 | bellard | int index, type;
|
646 | d8bc1fd0 | bellard | uint8_t *ptr; |
647 | d8bc1fd0 | bellard | |
648 | d8bc1fd0 | bellard | selector = T0 & 0xffff;
|
649 | d8bc1fd0 | bellard | if ((selector & 0xfffc) == 0) { |
650 | 90a9fdae | bellard | /* NULL selector case: invalid LDT */
|
651 | d8bc1fd0 | bellard | env->tr.base = NULL;
|
652 | d8bc1fd0 | bellard | env->tr.limit = 0;
|
653 | 90a9fdae | bellard | env->tr.flags = 0;
|
654 | d8bc1fd0 | bellard | } else {
|
655 | d8bc1fd0 | bellard | if (selector & 0x4) |
656 | d8bc1fd0 | bellard | raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
657 | d8bc1fd0 | bellard | dt = &env->gdt; |
658 | d8bc1fd0 | bellard | index = selector & ~7;
|
659 | d8bc1fd0 | bellard | if ((index + 7) > dt->limit) |
660 | d8bc1fd0 | bellard | raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
661 | d8bc1fd0 | bellard | ptr = dt->base + index; |
662 | d8bc1fd0 | bellard | e1 = ldl(ptr); |
663 | d8bc1fd0 | bellard | e2 = ldl(ptr + 4);
|
664 | d8bc1fd0 | bellard | type = (e2 >> DESC_TYPE_SHIFT) & 0xf;
|
665 | d8bc1fd0 | bellard | if ((e2 & DESC_S_MASK) ||
|
666 | d8bc1fd0 | bellard | (type != 2 && type != 9)) |
667 | d8bc1fd0 | bellard | raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
668 | d8bc1fd0 | bellard | if (!(e2 & DESC_P_MASK))
|
669 | d8bc1fd0 | bellard | raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc);
|
670 | d8bc1fd0 | bellard | load_seg_cache(&env->tr, e1, e2); |
671 | d8bc1fd0 | bellard | e2 |= 0x00000200; /* set the busy bit */ |
672 | d8bc1fd0 | bellard | stl(ptr + 4, e2);
|
673 | d8bc1fd0 | bellard | } |
674 | d8bc1fd0 | bellard | env->tr.selector = selector; |
675 | d8bc1fd0 | bellard | } |
676 | d8bc1fd0 | bellard | |
677 | 3ec9c4fc | bellard | /* only works if protected mode and not VM86 */
|
678 | d8bc1fd0 | bellard | void load_seg(int seg_reg, int selector, unsigned int cur_eip) |
679 | 3ec9c4fc | bellard | { |
680 | 3ec9c4fc | bellard | SegmentCache *sc; |
681 | 3ec9c4fc | bellard | uint32_t e1, e2; |
682 | d8bc1fd0 | bellard | |
683 | d8bc1fd0 | bellard | sc = &env->segs[seg_reg]; |
684 | 3ec9c4fc | bellard | if ((selector & 0xfffc) == 0) { |
685 | 3ec9c4fc | bellard | /* null selector case */
|
686 | 3ec9c4fc | bellard | if (seg_reg == R_SS) {
|
687 | 3ec9c4fc | bellard | EIP = cur_eip; |
688 | d8bc1fd0 | bellard | raise_exception_err(EXCP0D_GPF, 0);
|
689 | 3ec9c4fc | bellard | } else {
|
690 | 3ec9c4fc | bellard | /* XXX: each access should trigger an exception */
|
691 | 3ec9c4fc | bellard | sc->base = NULL;
|
692 | 3ec9c4fc | bellard | sc->limit = 0;
|
693 | 90a9fdae | bellard | sc->flags = 0;
|
694 | 3ec9c4fc | bellard | } |
695 | 3ec9c4fc | bellard | } else {
|
696 | 90a9fdae | bellard | if (load_segment(&e1, &e2, selector) != 0) { |
697 | 3ec9c4fc | bellard | EIP = cur_eip; |
698 | 3ec9c4fc | bellard | raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
699 | 3ec9c4fc | bellard | } |
700 | 3ec9c4fc | bellard | if (!(e2 & DESC_S_MASK) ||
|
701 | 3ec9c4fc | bellard | (e2 & (DESC_CS_MASK | DESC_R_MASK)) == DESC_CS_MASK) { |
702 | 3ec9c4fc | bellard | EIP = cur_eip; |
703 | 3ec9c4fc | bellard | raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
704 | 3ec9c4fc | bellard | } |
705 | 3ec9c4fc | bellard | |
706 | 3ec9c4fc | bellard | if (seg_reg == R_SS) {
|
707 | 3ec9c4fc | bellard | if ((e2 & (DESC_CS_MASK | DESC_W_MASK)) == 0) { |
708 | 3ec9c4fc | bellard | EIP = cur_eip; |
709 | 3ec9c4fc | bellard | raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
710 | 3ec9c4fc | bellard | } |
711 | 3ec9c4fc | bellard | } else {
|
712 | 3ec9c4fc | bellard | if ((e2 & (DESC_CS_MASK | DESC_R_MASK)) == DESC_CS_MASK) {
|
713 | 3ec9c4fc | bellard | EIP = cur_eip; |
714 | 3ec9c4fc | bellard | raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
715 | 3ec9c4fc | bellard | } |
716 | 3ec9c4fc | bellard | } |
717 | 3ec9c4fc | bellard | |
718 | 3ec9c4fc | bellard | if (!(e2 & DESC_P_MASK)) {
|
719 | 3ec9c4fc | bellard | EIP = cur_eip; |
720 | 3ec9c4fc | bellard | if (seg_reg == R_SS)
|
721 | 3ec9c4fc | bellard | raise_exception_err(EXCP0C_STACK, selector & 0xfffc);
|
722 | 3ec9c4fc | bellard | else
|
723 | 3ec9c4fc | bellard | raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc);
|
724 | 3ec9c4fc | bellard | } |
725 | d8bc1fd0 | bellard | load_seg_cache(sc, e1, e2); |
726 | 3ec9c4fc | bellard | #if 0
|
727 | 90a9fdae | bellard | fprintf(logfile, "load_seg: sel=0x%04x base=0x%08lx limit=0x%08lx flags=%08x\n",
|
728 | 90a9fdae | bellard | selector, (unsigned long)sc->base, sc->limit, sc->flags);
|
729 | 3ec9c4fc | bellard | #endif
|
730 | 3ec9c4fc | bellard | } |
731 | d8bc1fd0 | bellard | sc->selector = selector; |
732 | d8bc1fd0 | bellard | } |
733 | d8bc1fd0 | bellard | |
734 | d8bc1fd0 | bellard | /* protected mode jump */
|
735 | 2c1794c4 | bellard | void helper_ljmp_protected_T0_T1(void) |
736 | d8bc1fd0 | bellard | { |
737 | 2c1794c4 | bellard | int new_cs, new_eip;
|
738 | d8bc1fd0 | bellard | SegmentCache sc1; |
739 | d8bc1fd0 | bellard | uint32_t e1, e2, cpl, dpl, rpl; |
740 | d8bc1fd0 | bellard | |
741 | 2c1794c4 | bellard | new_cs = T0; |
742 | 2c1794c4 | bellard | new_eip = T1; |
743 | 2c1794c4 | bellard | if ((new_cs & 0xfffc) == 0) |
744 | d8bc1fd0 | bellard | raise_exception_err(EXCP0D_GPF, 0);
|
745 | 2c1794c4 | bellard | if (load_segment(&e1, &e2, new_cs) != 0) |
746 | 2c1794c4 | bellard | raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
747 | 2c1794c4 | bellard | cpl = env->segs[R_CS].selector & 3;
|
748 | 2c1794c4 | bellard | if (e2 & DESC_S_MASK) {
|
749 | 2c1794c4 | bellard | if (!(e2 & DESC_CS_MASK))
|
750 | 2c1794c4 | bellard | raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
751 | 2c1794c4 | bellard | dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
752 | 2c1794c4 | bellard | if (e2 & DESC_CS_MASK) {
|
753 | 2c1794c4 | bellard | /* conforming code segment */
|
754 | 2c1794c4 | bellard | if (dpl > cpl)
|
755 | 2c1794c4 | bellard | raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
756 | 2c1794c4 | bellard | } else {
|
757 | 2c1794c4 | bellard | /* non conforming code segment */
|
758 | 2c1794c4 | bellard | rpl = new_cs & 3;
|
759 | 2c1794c4 | bellard | if (rpl > cpl)
|
760 | 2c1794c4 | bellard | raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
761 | 2c1794c4 | bellard | if (dpl != cpl)
|
762 | 2c1794c4 | bellard | raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
763 | 2c1794c4 | bellard | } |
764 | 2c1794c4 | bellard | if (!(e2 & DESC_P_MASK))
|
765 | 2c1794c4 | bellard | raise_exception_err(EXCP0B_NOSEG, new_cs & 0xfffc);
|
766 | 2c1794c4 | bellard | load_seg_cache(&sc1, e1, e2); |
767 | 2c1794c4 | bellard | if (new_eip > sc1.limit)
|
768 | 2c1794c4 | bellard | raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
769 | 2c1794c4 | bellard | env->segs[R_CS].base = sc1.base; |
770 | 2c1794c4 | bellard | env->segs[R_CS].limit = sc1.limit; |
771 | 2c1794c4 | bellard | env->segs[R_CS].flags = sc1.flags; |
772 | 2c1794c4 | bellard | env->segs[R_CS].selector = (new_cs & 0xfffc) | cpl;
|
773 | 2c1794c4 | bellard | EIP = new_eip; |
774 | 2c1794c4 | bellard | } else {
|
775 | 2c1794c4 | bellard | cpu_abort(env, "jmp to call/task gate not supported 0x%04x:0x%08x",
|
776 | 2c1794c4 | bellard | new_cs, new_eip); |
777 | d8bc1fd0 | bellard | } |
778 | 2c1794c4 | bellard | } |
779 | d8bc1fd0 | bellard | |
780 | 2c1794c4 | bellard | /* real mode call */
|
781 | 2c1794c4 | bellard | void helper_lcall_real_T0_T1(int shift, int next_eip) |
782 | 2c1794c4 | bellard | { |
783 | 2c1794c4 | bellard | int new_cs, new_eip;
|
784 | 2c1794c4 | bellard | uint32_t esp, esp_mask; |
785 | 2c1794c4 | bellard | uint8_t *ssp; |
786 | 2c1794c4 | bellard | |
787 | 2c1794c4 | bellard | new_cs = T0; |
788 | 2c1794c4 | bellard | new_eip = T1; |
789 | 2c1794c4 | bellard | esp = env->regs[R_ESP]; |
790 | 2c1794c4 | bellard | esp_mask = 0xffffffff;
|
791 | 2c1794c4 | bellard | if (!(env->segs[R_SS].flags & DESC_B_MASK))
|
792 | 2c1794c4 | bellard | esp_mask = 0xffff;
|
793 | 2c1794c4 | bellard | ssp = env->segs[R_SS].base; |
794 | 2c1794c4 | bellard | if (shift) {
|
795 | 2c1794c4 | bellard | esp -= 4;
|
796 | 2c1794c4 | bellard | stl(ssp + (esp & esp_mask), env->segs[R_CS].selector); |
797 | 2c1794c4 | bellard | esp -= 4;
|
798 | 2c1794c4 | bellard | stl(ssp + (esp & esp_mask), next_eip); |
799 | 2c1794c4 | bellard | } else {
|
800 | 2c1794c4 | bellard | esp -= 2;
|
801 | 2c1794c4 | bellard | stw(ssp + (esp & esp_mask), env->segs[R_CS].selector); |
802 | 2c1794c4 | bellard | esp -= 2;
|
803 | 2c1794c4 | bellard | stw(ssp + (esp & esp_mask), next_eip); |
804 | 2c1794c4 | bellard | } |
805 | 2c1794c4 | bellard | |
806 | 2c1794c4 | bellard | if (!(env->segs[R_SS].flags & DESC_B_MASK))
|
807 | 2c1794c4 | bellard | env->regs[R_ESP] = (env->regs[R_ESP] & ~0xffff) | (esp & 0xffff); |
808 | 2c1794c4 | bellard | else
|
809 | 2c1794c4 | bellard | env->regs[R_ESP] = esp; |
810 | 2c1794c4 | bellard | env->eip = new_eip; |
811 | 2c1794c4 | bellard | env->segs[R_CS].selector = new_cs; |
812 | 2c1794c4 | bellard | env->segs[R_CS].base = (uint8_t *)(new_cs << 4);
|
813 | 2c1794c4 | bellard | } |
814 | 2c1794c4 | bellard | |
815 | 2c1794c4 | bellard | /* protected mode call */
|
816 | 2c1794c4 | bellard | void helper_lcall_protected_T0_T1(int shift, int next_eip) |
817 | 2c1794c4 | bellard | { |
818 | 2c1794c4 | bellard | int new_cs, new_eip;
|
819 | 2c1794c4 | bellard | SegmentCache sc1; |
820 | 2c1794c4 | bellard | uint32_t e1, e2, cpl, dpl, rpl, selector, offset, param_count; |
821 | 2c1794c4 | bellard | uint32_t ss, ss_e1, ss_e2, push_size, sp, type, ss_dpl; |
822 | 2c1794c4 | bellard | uint32_t old_ss, old_esp, val, i; |
823 | 2c1794c4 | bellard | uint8_t *ssp, *old_ssp; |
824 | 2c1794c4 | bellard | |
825 | 2c1794c4 | bellard | new_cs = T0; |
826 | 2c1794c4 | bellard | new_eip = T1; |
827 | 2c1794c4 | bellard | if ((new_cs & 0xfffc) == 0) |
828 | 2c1794c4 | bellard | raise_exception_err(EXCP0D_GPF, 0);
|
829 | 2c1794c4 | bellard | if (load_segment(&e1, &e2, new_cs) != 0) |
830 | 2c1794c4 | bellard | raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
831 | d8bc1fd0 | bellard | cpl = env->segs[R_CS].selector & 3;
|
832 | d8bc1fd0 | bellard | if (e2 & DESC_S_MASK) {
|
833 | d8bc1fd0 | bellard | if (!(e2 & DESC_CS_MASK))
|
834 | 2c1794c4 | bellard | raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
835 | d8bc1fd0 | bellard | dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
836 | d8bc1fd0 | bellard | if (e2 & DESC_CS_MASK) {
|
837 | d8bc1fd0 | bellard | /* conforming code segment */
|
838 | d8bc1fd0 | bellard | if (dpl > cpl)
|
839 | 2c1794c4 | bellard | raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
840 | d8bc1fd0 | bellard | } else {
|
841 | d8bc1fd0 | bellard | /* non conforming code segment */
|
842 | 2c1794c4 | bellard | rpl = new_cs & 3;
|
843 | d8bc1fd0 | bellard | if (rpl > cpl)
|
844 | 2c1794c4 | bellard | raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
845 | d8bc1fd0 | bellard | if (dpl != cpl)
|
846 | 2c1794c4 | bellard | raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
847 | d8bc1fd0 | bellard | } |
848 | d8bc1fd0 | bellard | if (!(e2 & DESC_P_MASK))
|
849 | 2c1794c4 | bellard | raise_exception_err(EXCP0B_NOSEG, new_cs & 0xfffc);
|
850 | 2c1794c4 | bellard | |
851 | 2c1794c4 | bellard | sp = env->regs[R_ESP]; |
852 | 2c1794c4 | bellard | if (!(env->segs[R_SS].flags & DESC_B_MASK))
|
853 | 2c1794c4 | bellard | sp &= 0xffff;
|
854 | 2c1794c4 | bellard | ssp = env->segs[R_SS].base + sp; |
855 | 2c1794c4 | bellard | if (shift) {
|
856 | 2c1794c4 | bellard | ssp -= 4;
|
857 | 2c1794c4 | bellard | stl(ssp, env->segs[R_CS].selector); |
858 | 2c1794c4 | bellard | ssp -= 4;
|
859 | 2c1794c4 | bellard | stl(ssp, next_eip); |
860 | 2c1794c4 | bellard | } else {
|
861 | 2c1794c4 | bellard | ssp -= 2;
|
862 | 2c1794c4 | bellard | stw(ssp, env->segs[R_CS].selector); |
863 | 2c1794c4 | bellard | ssp -= 2;
|
864 | 2c1794c4 | bellard | stw(ssp, next_eip); |
865 | 2c1794c4 | bellard | } |
866 | 2c1794c4 | bellard | sp -= (4 << shift);
|
867 | 2c1794c4 | bellard | |
868 | d8bc1fd0 | bellard | load_seg_cache(&sc1, e1, e2); |
869 | d8bc1fd0 | bellard | if (new_eip > sc1.limit)
|
870 | 2c1794c4 | bellard | raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
871 | 2c1794c4 | bellard | /* from this point, not restartable */
|
872 | 2c1794c4 | bellard | if (!(env->segs[R_SS].flags & DESC_B_MASK))
|
873 | 2c1794c4 | bellard | env->regs[R_ESP] = (env->regs[R_ESP] & 0xffff0000) | (sp & 0xffff); |
874 | 2c1794c4 | bellard | else
|
875 | 2c1794c4 | bellard | env->regs[R_ESP] = sp; |
876 | a363e34c | bellard | env->segs[R_CS].base = sc1.base; |
877 | a363e34c | bellard | env->segs[R_CS].limit = sc1.limit; |
878 | a363e34c | bellard | env->segs[R_CS].flags = sc1.flags; |
879 | 2c1794c4 | bellard | env->segs[R_CS].selector = (new_cs & 0xfffc) | cpl;
|
880 | d8bc1fd0 | bellard | EIP = new_eip; |
881 | d8bc1fd0 | bellard | } else {
|
882 | 2c1794c4 | bellard | /* check gate type */
|
883 | 2c1794c4 | bellard | type = (e2 >> DESC_TYPE_SHIFT) & 0x1f;
|
884 | 2c1794c4 | bellard | switch(type) {
|
885 | 2c1794c4 | bellard | case 1: /* available 286 TSS */ |
886 | 2c1794c4 | bellard | case 9: /* available 386 TSS */ |
887 | 2c1794c4 | bellard | case 5: /* task gate */ |
888 | 2c1794c4 | bellard | cpu_abort(env, "task gate not supported");
|
889 | 2c1794c4 | bellard | break;
|
890 | 2c1794c4 | bellard | case 4: /* 286 call gate */ |
891 | 2c1794c4 | bellard | case 12: /* 386 call gate */ |
892 | 2c1794c4 | bellard | break;
|
893 | 2c1794c4 | bellard | default:
|
894 | 2c1794c4 | bellard | raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
895 | 2c1794c4 | bellard | break;
|
896 | 2c1794c4 | bellard | } |
897 | 2c1794c4 | bellard | shift = type >> 3;
|
898 | 2c1794c4 | bellard | |
899 | 2c1794c4 | bellard | dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
900 | 2c1794c4 | bellard | rpl = new_cs & 3;
|
901 | 2c1794c4 | bellard | if (dpl < cpl || dpl < rpl)
|
902 | 2c1794c4 | bellard | raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
903 | 2c1794c4 | bellard | /* check valid bit */
|
904 | 2c1794c4 | bellard | if (!(e2 & DESC_P_MASK))
|
905 | 2c1794c4 | bellard | raise_exception_err(EXCP0B_NOSEG, new_cs & 0xfffc);
|
906 | 2c1794c4 | bellard | selector = e1 >> 16;
|
907 | 2c1794c4 | bellard | offset = (e2 & 0xffff0000) | (e1 & 0x0000ffff); |
908 | 2c1794c4 | bellard | if ((selector & 0xfffc) == 0) |
909 | 2c1794c4 | bellard | raise_exception_err(EXCP0D_GPF, 0);
|
910 | 2c1794c4 | bellard | |
911 | 2c1794c4 | bellard | if (load_segment(&e1, &e2, selector) != 0) |
912 | 2c1794c4 | bellard | raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
913 | 2c1794c4 | bellard | if (!(e2 & DESC_S_MASK) || !(e2 & (DESC_CS_MASK)))
|
914 | 2c1794c4 | bellard | raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
915 | 2c1794c4 | bellard | dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
916 | 2c1794c4 | bellard | if (dpl > cpl)
|
917 | 2c1794c4 | bellard | raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
918 | 2c1794c4 | bellard | if (!(e2 & DESC_P_MASK))
|
919 | 2c1794c4 | bellard | raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc);
|
920 | 2c1794c4 | bellard | |
921 | 2c1794c4 | bellard | if (!(e2 & DESC_C_MASK) && dpl < cpl) {
|
922 | 2c1794c4 | bellard | /* to inner priviledge */
|
923 | 2c1794c4 | bellard | get_ss_esp_from_tss(&ss, &sp, dpl); |
924 | 2c1794c4 | bellard | if ((ss & 0xfffc) == 0) |
925 | 2c1794c4 | bellard | raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
926 | 2c1794c4 | bellard | if ((ss & 3) != dpl) |
927 | 2c1794c4 | bellard | raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
928 | 2c1794c4 | bellard | if (load_segment(&ss_e1, &ss_e2, ss) != 0) |
929 | 2c1794c4 | bellard | raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
930 | 2c1794c4 | bellard | ss_dpl = (ss_e2 >> DESC_DPL_SHIFT) & 3;
|
931 | 2c1794c4 | bellard | if (ss_dpl != dpl)
|
932 | 2c1794c4 | bellard | raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
933 | 2c1794c4 | bellard | if (!(ss_e2 & DESC_S_MASK) ||
|
934 | 2c1794c4 | bellard | (ss_e2 & DESC_CS_MASK) || |
935 | 2c1794c4 | bellard | !(ss_e2 & DESC_W_MASK)) |
936 | 2c1794c4 | bellard | raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
937 | 2c1794c4 | bellard | if (!(ss_e2 & DESC_P_MASK))
|
938 | 2c1794c4 | bellard | raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
939 | 2c1794c4 | bellard | |
940 | 2c1794c4 | bellard | param_count = e2 & 0x1f;
|
941 | 2c1794c4 | bellard | push_size = ((param_count * 2) + 8) << shift; |
942 | 2c1794c4 | bellard | |
943 | 2c1794c4 | bellard | old_esp = env->regs[R_ESP]; |
944 | 2c1794c4 | bellard | old_ss = env->segs[R_SS].selector; |
945 | 2c1794c4 | bellard | if (!(env->segs[R_SS].flags & DESC_B_MASK))
|
946 | 2c1794c4 | bellard | old_esp &= 0xffff;
|
947 | 2c1794c4 | bellard | old_ssp = env->segs[R_SS].base + old_esp; |
948 | 2c1794c4 | bellard | |
949 | 2c1794c4 | bellard | /* XXX: from this point not restartable */
|
950 | 2c1794c4 | bellard | load_seg(R_SS, ss, env->eip); |
951 | 2c1794c4 | bellard | |
952 | 2c1794c4 | bellard | if (!(env->segs[R_SS].flags & DESC_B_MASK))
|
953 | 2c1794c4 | bellard | sp &= 0xffff;
|
954 | 2c1794c4 | bellard | ssp = env->segs[R_SS].base + sp; |
955 | 2c1794c4 | bellard | if (shift) {
|
956 | 2c1794c4 | bellard | ssp -= 4;
|
957 | 2c1794c4 | bellard | stl(ssp, old_ss); |
958 | 2c1794c4 | bellard | ssp -= 4;
|
959 | 2c1794c4 | bellard | stl(ssp, old_esp); |
960 | 2c1794c4 | bellard | ssp -= 4 * param_count;
|
961 | 2c1794c4 | bellard | for(i = 0; i < param_count; i++) { |
962 | 2c1794c4 | bellard | val = ldl(old_ssp + i * 4);
|
963 | 2c1794c4 | bellard | stl(ssp + i * 4, val);
|
964 | 2c1794c4 | bellard | } |
965 | 2c1794c4 | bellard | } else {
|
966 | 2c1794c4 | bellard | ssp -= 2;
|
967 | 2c1794c4 | bellard | stw(ssp, old_ss); |
968 | 2c1794c4 | bellard | ssp -= 2;
|
969 | 2c1794c4 | bellard | stw(ssp, old_esp); |
970 | 2c1794c4 | bellard | ssp -= 2 * param_count;
|
971 | 2c1794c4 | bellard | for(i = 0; i < param_count; i++) { |
972 | 2c1794c4 | bellard | val = lduw(old_ssp + i * 2);
|
973 | 2c1794c4 | bellard | stw(ssp + i * 2, val);
|
974 | 2c1794c4 | bellard | } |
975 | 2c1794c4 | bellard | } |
976 | 2c1794c4 | bellard | } else {
|
977 | 2c1794c4 | bellard | /* to same priviledge */
|
978 | 2c1794c4 | bellard | if (!(env->segs[R_SS].flags & DESC_B_MASK))
|
979 | 2c1794c4 | bellard | sp &= 0xffff;
|
980 | 2c1794c4 | bellard | ssp = env->segs[R_SS].base + sp; |
981 | 2c1794c4 | bellard | push_size = (4 << shift);
|
982 | 2c1794c4 | bellard | } |
983 | 2c1794c4 | bellard | |
984 | 2c1794c4 | bellard | if (shift) {
|
985 | 2c1794c4 | bellard | ssp -= 4;
|
986 | 2c1794c4 | bellard | stl(ssp, env->segs[R_CS].selector); |
987 | 2c1794c4 | bellard | ssp -= 4;
|
988 | 2c1794c4 | bellard | stl(ssp, next_eip); |
989 | 2c1794c4 | bellard | } else {
|
990 | 2c1794c4 | bellard | ssp -= 2;
|
991 | 2c1794c4 | bellard | stw(ssp, env->segs[R_CS].selector); |
992 | 2c1794c4 | bellard | ssp -= 2;
|
993 | 2c1794c4 | bellard | stw(ssp, next_eip); |
994 | 2c1794c4 | bellard | } |
995 | 2c1794c4 | bellard | |
996 | 2c1794c4 | bellard | sp -= push_size; |
997 | 2c1794c4 | bellard | load_seg(R_CS, selector, env->eip); |
998 | 2c1794c4 | bellard | /* from this point, not restartable if same priviledge */
|
999 | 2c1794c4 | bellard | if (!(env->segs[R_SS].flags & DESC_B_MASK))
|
1000 | 2c1794c4 | bellard | env->regs[R_ESP] = (env->regs[R_ESP] & 0xffff0000) | (sp & 0xffff); |
1001 | 2c1794c4 | bellard | else
|
1002 | 2c1794c4 | bellard | env->regs[R_ESP] = sp; |
1003 | 2c1794c4 | bellard | EIP = offset; |
1004 | d8bc1fd0 | bellard | } |
1005 | d8bc1fd0 | bellard | } |
1006 | d8bc1fd0 | bellard | |
1007 | 90a9fdae | bellard | /* init the segment cache in vm86 mode */
|
1008 | 90a9fdae | bellard | static inline void load_seg_vm(int seg, int selector) |
1009 | 90a9fdae | bellard | { |
1010 | 90a9fdae | bellard | SegmentCache *sc = &env->segs[seg]; |
1011 | 90a9fdae | bellard | selector &= 0xffff;
|
1012 | 90a9fdae | bellard | sc->base = (uint8_t *)(selector << 4);
|
1013 | 90a9fdae | bellard | sc->selector = selector; |
1014 | 90a9fdae | bellard | sc->flags = 0;
|
1015 | 90a9fdae | bellard | sc->limit = 0xffff;
|
1016 | 90a9fdae | bellard | } |
1017 | 90a9fdae | bellard | |
1018 | 8f186479 | bellard | /* real mode iret */
|
1019 | 8f186479 | bellard | void helper_iret_real(int shift) |
1020 | 8f186479 | bellard | { |
1021 | 8f186479 | bellard | uint32_t sp, new_cs, new_eip, new_eflags, new_esp; |
1022 | 8f186479 | bellard | uint8_t *ssp; |
1023 | 8f186479 | bellard | int eflags_mask;
|
1024 | 8f186479 | bellard | |
1025 | 8f186479 | bellard | sp = env->regs[R_ESP] & 0xffff;
|
1026 | 8f186479 | bellard | ssp = env->segs[R_SS].base + sp; |
1027 | 8f186479 | bellard | if (shift == 1) { |
1028 | 8f186479 | bellard | /* 32 bits */
|
1029 | 8f186479 | bellard | new_eflags = ldl(ssp + 8);
|
1030 | 8f186479 | bellard | new_cs = ldl(ssp + 4) & 0xffff; |
1031 | 8f186479 | bellard | new_eip = ldl(ssp) & 0xffff;
|
1032 | 8f186479 | bellard | } else {
|
1033 | 8f186479 | bellard | /* 16 bits */
|
1034 | 8f186479 | bellard | new_eflags = lduw(ssp + 4);
|
1035 | 8f186479 | bellard | new_cs = lduw(ssp + 2);
|
1036 | 8f186479 | bellard | new_eip = lduw(ssp); |
1037 | 8f186479 | bellard | } |
1038 | 8f186479 | bellard | new_esp = sp + (6 << shift);
|
1039 | 8f186479 | bellard | env->regs[R_ESP] = (env->regs[R_ESP] & 0xffff0000) |
|
1040 | 8f186479 | bellard | (new_esp & 0xffff);
|
1041 | 8f186479 | bellard | load_seg_vm(R_CS, new_cs); |
1042 | 8f186479 | bellard | env->eip = new_eip; |
1043 | 8f186479 | bellard | eflags_mask = FL_UPDATE_CPL0_MASK; |
1044 | 8f186479 | bellard | if (shift == 0) |
1045 | 8f186479 | bellard | eflags_mask &= 0xffff;
|
1046 | 8f186479 | bellard | load_eflags(new_eflags, eflags_mask); |
1047 | 8f186479 | bellard | } |
1048 | 8f186479 | bellard | |
1049 | 90a9fdae | bellard | /* protected mode iret */
|
1050 | 2c1794c4 | bellard | static inline void helper_ret_protected(int shift, int is_iret, int addend) |
1051 | 90a9fdae | bellard | { |
1052 | 90a9fdae | bellard | uint32_t sp, new_cs, new_eip, new_eflags, new_esp, new_ss; |
1053 | 90a9fdae | bellard | uint32_t new_es, new_ds, new_fs, new_gs; |
1054 | 90a9fdae | bellard | uint32_t e1, e2; |
1055 | 90a9fdae | bellard | int cpl, dpl, rpl, eflags_mask;
|
1056 | 90a9fdae | bellard | uint8_t *ssp; |
1057 | 90a9fdae | bellard | |
1058 | 90a9fdae | bellard | sp = env->regs[R_ESP]; |
1059 | 90a9fdae | bellard | if (!(env->segs[R_SS].flags & DESC_B_MASK))
|
1060 | 90a9fdae | bellard | sp &= 0xffff;
|
1061 | 90a9fdae | bellard | ssp = env->segs[R_SS].base + sp; |
1062 | 90a9fdae | bellard | if (shift == 1) { |
1063 | 90a9fdae | bellard | /* 32 bits */
|
1064 | 2c1794c4 | bellard | if (is_iret)
|
1065 | 2c1794c4 | bellard | new_eflags = ldl(ssp + 8);
|
1066 | 90a9fdae | bellard | new_cs = ldl(ssp + 4) & 0xffff; |
1067 | 90a9fdae | bellard | new_eip = ldl(ssp); |
1068 | 2c1794c4 | bellard | if (is_iret && (new_eflags & VM_MASK))
|
1069 | 90a9fdae | bellard | goto return_to_vm86;
|
1070 | 90a9fdae | bellard | } else {
|
1071 | 90a9fdae | bellard | /* 16 bits */
|
1072 | 2c1794c4 | bellard | if (is_iret)
|
1073 | 2c1794c4 | bellard | new_eflags = lduw(ssp + 4);
|
1074 | 90a9fdae | bellard | new_cs = lduw(ssp + 2);
|
1075 | 90a9fdae | bellard | new_eip = lduw(ssp); |
1076 | 90a9fdae | bellard | } |
1077 | 90a9fdae | bellard | if ((new_cs & 0xfffc) == 0) |
1078 | 90a9fdae | bellard | raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
1079 | 90a9fdae | bellard | if (load_segment(&e1, &e2, new_cs) != 0) |
1080 | 90a9fdae | bellard | raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
1081 | 90a9fdae | bellard | if (!(e2 & DESC_S_MASK) ||
|
1082 | 90a9fdae | bellard | !(e2 & DESC_CS_MASK)) |
1083 | 90a9fdae | bellard | raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
1084 | 90a9fdae | bellard | cpl = env->segs[R_CS].selector & 3;
|
1085 | 90a9fdae | bellard | rpl = new_cs & 3;
|
1086 | 90a9fdae | bellard | if (rpl < cpl)
|
1087 | 90a9fdae | bellard | raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
1088 | 90a9fdae | bellard | dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
1089 | 90a9fdae | bellard | if (e2 & DESC_CS_MASK) {
|
1090 | 90a9fdae | bellard | if (dpl > rpl)
|
1091 | 90a9fdae | bellard | raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
1092 | 90a9fdae | bellard | } else {
|
1093 | 90a9fdae | bellard | if (dpl != rpl)
|
1094 | 90a9fdae | bellard | raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
1095 | 90a9fdae | bellard | } |
1096 | 90a9fdae | bellard | if (!(e2 & DESC_P_MASK))
|
1097 | 90a9fdae | bellard | raise_exception_err(EXCP0B_NOSEG, new_cs & 0xfffc);
|
1098 | 90a9fdae | bellard | |
1099 | 90a9fdae | bellard | if (rpl == cpl) {
|
1100 | 90a9fdae | bellard | /* return to same priledge level */
|
1101 | 90a9fdae | bellard | load_seg(R_CS, new_cs, env->eip); |
1102 | 2c1794c4 | bellard | new_esp = sp + (4 << shift) + ((2 * is_iret) << shift) + addend; |
1103 | 90a9fdae | bellard | } else {
|
1104 | 2c1794c4 | bellard | /* return to different priviledge level */
|
1105 | 2c1794c4 | bellard | ssp += (4 << shift) + ((2 * is_iret) << shift) + addend; |
1106 | 90a9fdae | bellard | if (shift == 1) { |
1107 | 90a9fdae | bellard | /* 32 bits */
|
1108 | 2c1794c4 | bellard | new_esp = ldl(ssp); |
1109 | 2c1794c4 | bellard | new_ss = ldl(ssp + 4) & 0xffff; |
1110 | 90a9fdae | bellard | } else {
|
1111 | 90a9fdae | bellard | /* 16 bits */
|
1112 | 2c1794c4 | bellard | new_esp = lduw(ssp); |
1113 | 2c1794c4 | bellard | new_ss = lduw(ssp + 2);
|
1114 | 90a9fdae | bellard | } |
1115 | 90a9fdae | bellard | |
1116 | 90a9fdae | bellard | if ((new_ss & 3) != rpl) |
1117 | 90a9fdae | bellard | raise_exception_err(EXCP0D_GPF, new_ss & 0xfffc);
|
1118 | 90a9fdae | bellard | if (load_segment(&e1, &e2, new_ss) != 0) |
1119 | 90a9fdae | bellard | raise_exception_err(EXCP0D_GPF, new_ss & 0xfffc);
|
1120 | 90a9fdae | bellard | if (!(e2 & DESC_S_MASK) ||
|
1121 | 90a9fdae | bellard | (e2 & DESC_CS_MASK) || |
1122 | 90a9fdae | bellard | !(e2 & DESC_W_MASK)) |
1123 | 90a9fdae | bellard | raise_exception_err(EXCP0D_GPF, new_ss & 0xfffc);
|
1124 | 90a9fdae | bellard | dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
1125 | 90a9fdae | bellard | if (dpl != rpl)
|
1126 | 90a9fdae | bellard | raise_exception_err(EXCP0D_GPF, new_ss & 0xfffc);
|
1127 | 90a9fdae | bellard | if (!(e2 & DESC_P_MASK))
|
1128 | 90a9fdae | bellard | raise_exception_err(EXCP0B_NOSEG, new_ss & 0xfffc);
|
1129 | 90a9fdae | bellard | |
1130 | 90a9fdae | bellard | load_seg(R_CS, new_cs, env->eip); |
1131 | 90a9fdae | bellard | load_seg(R_SS, new_ss, env->eip); |
1132 | 90a9fdae | bellard | } |
1133 | 90a9fdae | bellard | if (env->segs[R_SS].flags & DESC_B_MASK)
|
1134 | 90a9fdae | bellard | env->regs[R_ESP] = new_esp; |
1135 | 90a9fdae | bellard | else
|
1136 | 90a9fdae | bellard | env->regs[R_ESP] = (env->regs[R_ESP] & 0xffff0000) |
|
1137 | 90a9fdae | bellard | (new_esp & 0xffff);
|
1138 | 90a9fdae | bellard | env->eip = new_eip; |
1139 | 2c1794c4 | bellard | if (is_iret) {
|
1140 | 2c1794c4 | bellard | if (cpl == 0) |
1141 | 2c1794c4 | bellard | eflags_mask = FL_UPDATE_CPL0_MASK; |
1142 | 2c1794c4 | bellard | else
|
1143 | 2c1794c4 | bellard | eflags_mask = FL_UPDATE_MASK32; |
1144 | 2c1794c4 | bellard | if (shift == 0) |
1145 | 2c1794c4 | bellard | eflags_mask &= 0xffff;
|
1146 | 2c1794c4 | bellard | load_eflags(new_eflags, eflags_mask); |
1147 | 2c1794c4 | bellard | } |
1148 | 90a9fdae | bellard | return;
|
1149 | 90a9fdae | bellard | |
1150 | 90a9fdae | bellard | return_to_vm86:
|
1151 | 90a9fdae | bellard | new_esp = ldl(ssp + 12);
|
1152 | 90a9fdae | bellard | new_ss = ldl(ssp + 16);
|
1153 | 90a9fdae | bellard | new_es = ldl(ssp + 20);
|
1154 | 90a9fdae | bellard | new_ds = ldl(ssp + 24);
|
1155 | 90a9fdae | bellard | new_fs = ldl(ssp + 28);
|
1156 | 90a9fdae | bellard | new_gs = ldl(ssp + 32);
|
1157 | 90a9fdae | bellard | |
1158 | 90a9fdae | bellard | /* modify processor state */
|
1159 | 90a9fdae | bellard | load_eflags(new_eflags, FL_UPDATE_CPL0_MASK | VM_MASK | VIF_MASK | VIP_MASK); |
1160 | 90a9fdae | bellard | load_seg_vm(R_CS, new_cs); |
1161 | 90a9fdae | bellard | load_seg_vm(R_SS, new_ss); |
1162 | 90a9fdae | bellard | load_seg_vm(R_ES, new_es); |
1163 | 90a9fdae | bellard | load_seg_vm(R_DS, new_ds); |
1164 | 90a9fdae | bellard | load_seg_vm(R_FS, new_fs); |
1165 | 90a9fdae | bellard | load_seg_vm(R_GS, new_gs); |
1166 | 90a9fdae | bellard | |
1167 | 90a9fdae | bellard | env->eip = new_eip; |
1168 | 90a9fdae | bellard | env->regs[R_ESP] = new_esp; |
1169 | 90a9fdae | bellard | } |
1170 | 90a9fdae | bellard | |
1171 | 2c1794c4 | bellard | void helper_iret_protected(int shift) |
1172 | 2c1794c4 | bellard | { |
1173 | 2c1794c4 | bellard | helper_ret_protected(shift, 1, 0); |
1174 | 2c1794c4 | bellard | } |
1175 | 2c1794c4 | bellard | |
1176 | 2c1794c4 | bellard | void helper_lret_protected(int shift, int addend) |
1177 | 2c1794c4 | bellard | { |
1178 | 2c1794c4 | bellard | helper_ret_protected(shift, 0, addend);
|
1179 | 2c1794c4 | bellard | } |
1180 | 2c1794c4 | bellard | |
1181 | d8bc1fd0 | bellard | void helper_movl_crN_T0(int reg) |
1182 | d8bc1fd0 | bellard | { |
1183 | 90a9fdae | bellard | env->cr[reg] = T0; |
1184 | d8bc1fd0 | bellard | switch(reg) {
|
1185 | d8bc1fd0 | bellard | case 0: |
1186 | 90a9fdae | bellard | cpu_x86_update_cr0(env); |
1187 | d8bc1fd0 | bellard | break;
|
1188 | d8bc1fd0 | bellard | case 3: |
1189 | 90a9fdae | bellard | cpu_x86_update_cr3(env); |
1190 | d8bc1fd0 | bellard | break;
|
1191 | d8bc1fd0 | bellard | } |
1192 | d8bc1fd0 | bellard | } |
1193 | d8bc1fd0 | bellard | |
1194 | d8bc1fd0 | bellard | /* XXX: do more */
|
1195 | d8bc1fd0 | bellard | void helper_movl_drN_T0(int reg) |
1196 | d8bc1fd0 | bellard | { |
1197 | d8bc1fd0 | bellard | env->dr[reg] = T0; |
1198 | 3ec9c4fc | bellard | } |
1199 | 3ec9c4fc | bellard | |
1200 | 90a9fdae | bellard | void helper_invlpg(unsigned int addr) |
1201 | 90a9fdae | bellard | { |
1202 | 90a9fdae | bellard | cpu_x86_flush_tlb(env, addr); |
1203 | 90a9fdae | bellard | } |
1204 | 90a9fdae | bellard | |
1205 | 2d0e9143 | bellard | /* rdtsc */
|
1206 | 2d0e9143 | bellard | #ifndef __i386__
|
1207 | 2d0e9143 | bellard | uint64_t emu_time; |
1208 | 2d0e9143 | bellard | #endif
|
1209 | 2d0e9143 | bellard | |
1210 | 2d0e9143 | bellard | void helper_rdtsc(void) |
1211 | 2d0e9143 | bellard | { |
1212 | 2d0e9143 | bellard | uint64_t val; |
1213 | 2d0e9143 | bellard | #ifdef __i386__
|
1214 | 2d0e9143 | bellard | asm("rdtsc" : "=A" (val)); |
1215 | 2d0e9143 | bellard | #else
|
1216 | 2d0e9143 | bellard | /* better than nothing: the time increases */
|
1217 | 2d0e9143 | bellard | val = emu_time++; |
1218 | 2d0e9143 | bellard | #endif
|
1219 | 2d0e9143 | bellard | EAX = val; |
1220 | 2d0e9143 | bellard | EDX = val >> 32;
|
1221 | 2d0e9143 | bellard | } |
1222 | 2d0e9143 | bellard | |
1223 | 3c1cf9fa | bellard | void helper_wrmsr(void) |
1224 | 3c1cf9fa | bellard | { |
1225 | 3c1cf9fa | bellard | switch(ECX) {
|
1226 | 3c1cf9fa | bellard | case MSR_IA32_SYSENTER_CS:
|
1227 | 3c1cf9fa | bellard | env->sysenter_cs = EAX & 0xffff;
|
1228 | 3c1cf9fa | bellard | break;
|
1229 | 3c1cf9fa | bellard | case MSR_IA32_SYSENTER_ESP:
|
1230 | 3c1cf9fa | bellard | env->sysenter_esp = EAX; |
1231 | 3c1cf9fa | bellard | break;
|
1232 | 3c1cf9fa | bellard | case MSR_IA32_SYSENTER_EIP:
|
1233 | 3c1cf9fa | bellard | env->sysenter_eip = EAX; |
1234 | 3c1cf9fa | bellard | break;
|
1235 | 3c1cf9fa | bellard | default:
|
1236 | 3c1cf9fa | bellard | /* XXX: exception ? */
|
1237 | 3c1cf9fa | bellard | break;
|
1238 | 3c1cf9fa | bellard | } |
1239 | 3c1cf9fa | bellard | } |
1240 | 3c1cf9fa | bellard | |
1241 | 3c1cf9fa | bellard | void helper_rdmsr(void) |
1242 | 3c1cf9fa | bellard | { |
1243 | 3c1cf9fa | bellard | switch(ECX) {
|
1244 | 3c1cf9fa | bellard | case MSR_IA32_SYSENTER_CS:
|
1245 | 3c1cf9fa | bellard | EAX = env->sysenter_cs; |
1246 | 3c1cf9fa | bellard | EDX = 0;
|
1247 | 3c1cf9fa | bellard | break;
|
1248 | 3c1cf9fa | bellard | case MSR_IA32_SYSENTER_ESP:
|
1249 | 3c1cf9fa | bellard | EAX = env->sysenter_esp; |
1250 | 3c1cf9fa | bellard | EDX = 0;
|
1251 | 3c1cf9fa | bellard | break;
|
1252 | 3c1cf9fa | bellard | case MSR_IA32_SYSENTER_EIP:
|
1253 | 3c1cf9fa | bellard | EAX = env->sysenter_eip; |
1254 | 3c1cf9fa | bellard | EDX = 0;
|
1255 | 3c1cf9fa | bellard | break;
|
1256 | 3c1cf9fa | bellard | default:
|
1257 | 3c1cf9fa | bellard | /* XXX: exception ? */
|
1258 | 3c1cf9fa | bellard | break;
|
1259 | 3c1cf9fa | bellard | } |
1260 | 3c1cf9fa | bellard | } |
1261 | 3c1cf9fa | bellard | |
1262 | 3ec9c4fc | bellard | void helper_lsl(void) |
1263 | 3ec9c4fc | bellard | { |
1264 | 3ec9c4fc | bellard | unsigned int selector, limit; |
1265 | 3ec9c4fc | bellard | uint32_t e1, e2; |
1266 | 3ec9c4fc | bellard | |
1267 | 3ec9c4fc | bellard | CC_SRC = cc_table[CC_OP].compute_all() & ~CC_Z; |
1268 | 3ec9c4fc | bellard | selector = T0 & 0xffff;
|
1269 | 90a9fdae | bellard | if (load_segment(&e1, &e2, selector) != 0) |
1270 | 3ec9c4fc | bellard | return;
|
1271 | 3ec9c4fc | bellard | limit = (e1 & 0xffff) | (e2 & 0x000f0000); |
1272 | 3ec9c4fc | bellard | if (e2 & (1 << 23)) |
1273 | 3ec9c4fc | bellard | limit = (limit << 12) | 0xfff; |
1274 | 3ec9c4fc | bellard | T1 = limit; |
1275 | 3ec9c4fc | bellard | CC_SRC |= CC_Z; |
1276 | 3ec9c4fc | bellard | } |
1277 | 3ec9c4fc | bellard | |
1278 | 3ec9c4fc | bellard | void helper_lar(void) |
1279 | 3ec9c4fc | bellard | { |
1280 | 3ec9c4fc | bellard | unsigned int selector; |
1281 | 90a9fdae | bellard | uint32_t e1, e2; |
1282 | 3ec9c4fc | bellard | |
1283 | 3ec9c4fc | bellard | CC_SRC = cc_table[CC_OP].compute_all() & ~CC_Z; |
1284 | 3ec9c4fc | bellard | selector = T0 & 0xffff;
|
1285 | 90a9fdae | bellard | if (load_segment(&e1, &e2, selector) != 0) |
1286 | 3ec9c4fc | bellard | return;
|
1287 | 3ec9c4fc | bellard | T1 = e2 & 0x00f0ff00;
|
1288 | 3ec9c4fc | bellard | CC_SRC |= CC_Z; |
1289 | 3ec9c4fc | bellard | } |
1290 | 3ec9c4fc | bellard | |
1291 | 3ec9c4fc | bellard | /* FPU helpers */
|
1292 | 3ec9c4fc | bellard | |
1293 | 3ec9c4fc | bellard | #ifndef USE_X86LDOUBLE
|
1294 | 3ec9c4fc | bellard | void helper_fldt_ST0_A0(void) |
1295 | 3ec9c4fc | bellard | { |
1296 | 4d40895f | bellard | int new_fpstt;
|
1297 | 4d40895f | bellard | new_fpstt = (env->fpstt - 1) & 7; |
1298 | 4d40895f | bellard | env->fpregs[new_fpstt] = helper_fldt((uint8_t *)A0); |
1299 | 4d40895f | bellard | env->fpstt = new_fpstt; |
1300 | 4d40895f | bellard | env->fptags[new_fpstt] = 0; /* validate stack entry */ |
1301 | 3ec9c4fc | bellard | } |
1302 | 3ec9c4fc | bellard | |
1303 | 3ec9c4fc | bellard | void helper_fstt_ST0_A0(void) |
1304 | 3ec9c4fc | bellard | { |
1305 | 3ec9c4fc | bellard | helper_fstt(ST0, (uint8_t *)A0); |
1306 | 3ec9c4fc | bellard | } |
1307 | 3ec9c4fc | bellard | #endif
|
1308 | 3ec9c4fc | bellard | |
1309 | 3ec9c4fc | bellard | /* BCD ops */
|
1310 | 3ec9c4fc | bellard | |
1311 | 3ec9c4fc | bellard | #define MUL10(iv) ( iv + iv + (iv << 3) ) |
1312 | 3ec9c4fc | bellard | |
1313 | 3ec9c4fc | bellard | void helper_fbld_ST0_A0(void) |
1314 | 3ec9c4fc | bellard | { |
1315 | 4d40895f | bellard | CPU86_LDouble tmp; |
1316 | 4d40895f | bellard | uint64_t val; |
1317 | 3ec9c4fc | bellard | unsigned int v; |
1318 | 4d40895f | bellard | int i;
|
1319 | 3ec9c4fc | bellard | |
1320 | 4d40895f | bellard | val = 0;
|
1321 | 4d40895f | bellard | for(i = 8; i >= 0; i--) { |
1322 | 4d40895f | bellard | v = ldub((uint8_t *)A0 + i); |
1323 | 4d40895f | bellard | val = (val * 100) + ((v >> 4) * 10) + (v & 0xf); |
1324 | 4d40895f | bellard | } |
1325 | 4d40895f | bellard | tmp = val; |
1326 | 4d40895f | bellard | if (ldub((uint8_t *)A0 + 9) & 0x80) |
1327 | 4d40895f | bellard | tmp = -tmp; |
1328 | 4d40895f | bellard | fpush(); |
1329 | 4d40895f | bellard | ST0 = tmp; |
1330 | 3ec9c4fc | bellard | } |
1331 | 3ec9c4fc | bellard | |
1332 | 3ec9c4fc | bellard | void helper_fbst_ST0_A0(void) |
1333 | 3ec9c4fc | bellard | { |
1334 | 4d40895f | bellard | CPU86_LDouble tmp; |
1335 | 3ec9c4fc | bellard | int v;
|
1336 | 3ec9c4fc | bellard | uint8_t *mem_ref, *mem_end; |
1337 | 4d40895f | bellard | int64_t val; |
1338 | 3ec9c4fc | bellard | |
1339 | 4d40895f | bellard | tmp = rint(ST0); |
1340 | 4d40895f | bellard | val = (int64_t)tmp; |
1341 | 3ec9c4fc | bellard | mem_ref = (uint8_t *)A0; |
1342 | 4d40895f | bellard | mem_end = mem_ref + 9;
|
1343 | 4d40895f | bellard | if (val < 0) { |
1344 | 4d40895f | bellard | stb(mem_end, 0x80);
|
1345 | 4d40895f | bellard | val = -val; |
1346 | 3ec9c4fc | bellard | } else {
|
1347 | 4d40895f | bellard | stb(mem_end, 0x00);
|
1348 | 3ec9c4fc | bellard | } |
1349 | 3ec9c4fc | bellard | while (mem_ref < mem_end) {
|
1350 | 4d40895f | bellard | if (val == 0) |
1351 | 3ec9c4fc | bellard | break;
|
1352 | 4d40895f | bellard | v = val % 100;
|
1353 | 4d40895f | bellard | val = val / 100;
|
1354 | 4d40895f | bellard | v = ((v / 10) << 4) | (v % 10); |
1355 | 3ec9c4fc | bellard | stb(mem_ref++, v); |
1356 | 3ec9c4fc | bellard | } |
1357 | 3ec9c4fc | bellard | while (mem_ref < mem_end) {
|
1358 | 3ec9c4fc | bellard | stb(mem_ref++, 0);
|
1359 | 3ec9c4fc | bellard | } |
1360 | 3ec9c4fc | bellard | } |
1361 | 3ec9c4fc | bellard | |
1362 | 3ec9c4fc | bellard | void helper_f2xm1(void) |
1363 | 3ec9c4fc | bellard | { |
1364 | 3ec9c4fc | bellard | ST0 = pow(2.0,ST0) - 1.0; |
1365 | 3ec9c4fc | bellard | } |
1366 | 3ec9c4fc | bellard | |
1367 | 3ec9c4fc | bellard | void helper_fyl2x(void) |
1368 | 3ec9c4fc | bellard | { |
1369 | 3ec9c4fc | bellard | CPU86_LDouble fptemp; |
1370 | 3ec9c4fc | bellard | |
1371 | 3ec9c4fc | bellard | fptemp = ST0; |
1372 | 3ec9c4fc | bellard | if (fptemp>0.0){ |
1373 | 3ec9c4fc | bellard | fptemp = log(fptemp)/log(2.0); /* log2(ST) */ |
1374 | 3ec9c4fc | bellard | ST1 *= fptemp; |
1375 | 3ec9c4fc | bellard | fpop(); |
1376 | 3ec9c4fc | bellard | } else {
|
1377 | 3ec9c4fc | bellard | env->fpus &= (~0x4700);
|
1378 | 3ec9c4fc | bellard | env->fpus |= 0x400;
|
1379 | 3ec9c4fc | bellard | } |
1380 | 3ec9c4fc | bellard | } |
1381 | 3ec9c4fc | bellard | |
1382 | 3ec9c4fc | bellard | void helper_fptan(void) |
1383 | 3ec9c4fc | bellard | { |
1384 | 3ec9c4fc | bellard | CPU86_LDouble fptemp; |
1385 | 3ec9c4fc | bellard | |
1386 | 3ec9c4fc | bellard | fptemp = ST0; |
1387 | 3ec9c4fc | bellard | if((fptemp > MAXTAN)||(fptemp < -MAXTAN)) {
|
1388 | 3ec9c4fc | bellard | env->fpus |= 0x400;
|
1389 | 3ec9c4fc | bellard | } else {
|
1390 | 3ec9c4fc | bellard | ST0 = tan(fptemp); |
1391 | 3ec9c4fc | bellard | fpush(); |
1392 | 3ec9c4fc | bellard | ST0 = 1.0; |
1393 | 3ec9c4fc | bellard | env->fpus &= (~0x400); /* C2 <-- 0 */ |
1394 | 3ec9c4fc | bellard | /* the above code is for |arg| < 2**52 only */
|
1395 | 3ec9c4fc | bellard | } |
1396 | 3ec9c4fc | bellard | } |
1397 | 3ec9c4fc | bellard | |
1398 | 3ec9c4fc | bellard | void helper_fpatan(void) |
1399 | 3ec9c4fc | bellard | { |
1400 | 3ec9c4fc | bellard | CPU86_LDouble fptemp, fpsrcop; |
1401 | 3ec9c4fc | bellard | |
1402 | 3ec9c4fc | bellard | fpsrcop = ST1; |
1403 | 3ec9c4fc | bellard | fptemp = ST0; |
1404 | 3ec9c4fc | bellard | ST1 = atan2(fpsrcop,fptemp); |
1405 | 3ec9c4fc | bellard | fpop(); |
1406 | 3ec9c4fc | bellard | } |
1407 | 3ec9c4fc | bellard | |
1408 | 3ec9c4fc | bellard | void helper_fxtract(void) |
1409 | 3ec9c4fc | bellard | { |
1410 | 3ec9c4fc | bellard | CPU86_LDoubleU temp; |
1411 | 3ec9c4fc | bellard | unsigned int expdif; |
1412 | 3ec9c4fc | bellard | |
1413 | 3ec9c4fc | bellard | temp.d = ST0; |
1414 | 3ec9c4fc | bellard | expdif = EXPD(temp) - EXPBIAS; |
1415 | 3ec9c4fc | bellard | /*DP exponent bias*/
|
1416 | 3ec9c4fc | bellard | ST0 = expdif; |
1417 | 3ec9c4fc | bellard | fpush(); |
1418 | 3ec9c4fc | bellard | BIASEXPONENT(temp); |
1419 | 3ec9c4fc | bellard | ST0 = temp.d; |
1420 | 3ec9c4fc | bellard | } |
1421 | 3ec9c4fc | bellard | |
1422 | 3ec9c4fc | bellard | void helper_fprem1(void) |
1423 | 3ec9c4fc | bellard | { |
1424 | 3ec9c4fc | bellard | CPU86_LDouble dblq, fpsrcop, fptemp; |
1425 | 3ec9c4fc | bellard | CPU86_LDoubleU fpsrcop1, fptemp1; |
1426 | 3ec9c4fc | bellard | int expdif;
|
1427 | 3ec9c4fc | bellard | int q;
|
1428 | 3ec9c4fc | bellard | |
1429 | 3ec9c4fc | bellard | fpsrcop = ST0; |
1430 | 3ec9c4fc | bellard | fptemp = ST1; |
1431 | 3ec9c4fc | bellard | fpsrcop1.d = fpsrcop; |
1432 | 3ec9c4fc | bellard | fptemp1.d = fptemp; |
1433 | 3ec9c4fc | bellard | expdif = EXPD(fpsrcop1) - EXPD(fptemp1); |
1434 | 3ec9c4fc | bellard | if (expdif < 53) { |
1435 | 3ec9c4fc | bellard | dblq = fpsrcop / fptemp; |
1436 | 3ec9c4fc | bellard | dblq = (dblq < 0.0)? ceil(dblq): floor(dblq); |
1437 | 3ec9c4fc | bellard | ST0 = fpsrcop - fptemp*dblq; |
1438 | 3ec9c4fc | bellard | q = (int)dblq; /* cutting off top bits is assumed here */ |
1439 | 3ec9c4fc | bellard | env->fpus &= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */ |
1440 | 3ec9c4fc | bellard | /* (C0,C1,C3) <-- (q2,q1,q0) */
|
1441 | 3ec9c4fc | bellard | env->fpus |= (q&0x4) << 6; /* (C0) <-- q2 */ |
1442 | 3ec9c4fc | bellard | env->fpus |= (q&0x2) << 8; /* (C1) <-- q1 */ |
1443 | 3ec9c4fc | bellard | env->fpus |= (q&0x1) << 14; /* (C3) <-- q0 */ |
1444 | 3ec9c4fc | bellard | } else {
|
1445 | 3ec9c4fc | bellard | env->fpus |= 0x400; /* C2 <-- 1 */ |
1446 | 3ec9c4fc | bellard | fptemp = pow(2.0, expdif-50); |
1447 | 3ec9c4fc | bellard | fpsrcop = (ST0 / ST1) / fptemp; |
1448 | 3ec9c4fc | bellard | /* fpsrcop = integer obtained by rounding to the nearest */
|
1449 | 3ec9c4fc | bellard | fpsrcop = (fpsrcop-floor(fpsrcop) < ceil(fpsrcop)-fpsrcop)? |
1450 | 3ec9c4fc | bellard | floor(fpsrcop): ceil(fpsrcop); |
1451 | 3ec9c4fc | bellard | ST0 -= (ST1 * fpsrcop * fptemp); |
1452 | 3ec9c4fc | bellard | } |
1453 | 3ec9c4fc | bellard | } |
1454 | 3ec9c4fc | bellard | |
1455 | 3ec9c4fc | bellard | void helper_fprem(void) |
1456 | 3ec9c4fc | bellard | { |
1457 | 3ec9c4fc | bellard | CPU86_LDouble dblq, fpsrcop, fptemp; |
1458 | 3ec9c4fc | bellard | CPU86_LDoubleU fpsrcop1, fptemp1; |
1459 | 3ec9c4fc | bellard | int expdif;
|
1460 | 3ec9c4fc | bellard | int q;
|
1461 | 3ec9c4fc | bellard | |
1462 | 3ec9c4fc | bellard | fpsrcop = ST0; |
1463 | 3ec9c4fc | bellard | fptemp = ST1; |
1464 | 3ec9c4fc | bellard | fpsrcop1.d = fpsrcop; |
1465 | 3ec9c4fc | bellard | fptemp1.d = fptemp; |
1466 | 3ec9c4fc | bellard | expdif = EXPD(fpsrcop1) - EXPD(fptemp1); |
1467 | 3ec9c4fc | bellard | if ( expdif < 53 ) { |
1468 | 3ec9c4fc | bellard | dblq = fpsrcop / fptemp; |
1469 | 3ec9c4fc | bellard | dblq = (dblq < 0.0)? ceil(dblq): floor(dblq); |
1470 | 3ec9c4fc | bellard | ST0 = fpsrcop - fptemp*dblq; |
1471 | 3ec9c4fc | bellard | q = (int)dblq; /* cutting off top bits is assumed here */ |
1472 | 3ec9c4fc | bellard | env->fpus &= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */ |
1473 | 3ec9c4fc | bellard | /* (C0,C1,C3) <-- (q2,q1,q0) */
|
1474 | 3ec9c4fc | bellard | env->fpus |= (q&0x4) << 6; /* (C0) <-- q2 */ |
1475 | 3ec9c4fc | bellard | env->fpus |= (q&0x2) << 8; /* (C1) <-- q1 */ |
1476 | 3ec9c4fc | bellard | env->fpus |= (q&0x1) << 14; /* (C3) <-- q0 */ |
1477 | 3ec9c4fc | bellard | } else {
|
1478 | 3ec9c4fc | bellard | env->fpus |= 0x400; /* C2 <-- 1 */ |
1479 | 3ec9c4fc | bellard | fptemp = pow(2.0, expdif-50); |
1480 | 3ec9c4fc | bellard | fpsrcop = (ST0 / ST1) / fptemp; |
1481 | 3ec9c4fc | bellard | /* fpsrcop = integer obtained by chopping */
|
1482 | 3ec9c4fc | bellard | fpsrcop = (fpsrcop < 0.0)? |
1483 | 3ec9c4fc | bellard | -(floor(fabs(fpsrcop))): floor(fpsrcop); |
1484 | 3ec9c4fc | bellard | ST0 -= (ST1 * fpsrcop * fptemp); |
1485 | 3ec9c4fc | bellard | } |
1486 | 3ec9c4fc | bellard | } |
1487 | 3ec9c4fc | bellard | |
1488 | 3ec9c4fc | bellard | void helper_fyl2xp1(void) |
1489 | 3ec9c4fc | bellard | { |
1490 | 3ec9c4fc | bellard | CPU86_LDouble fptemp; |
1491 | 3ec9c4fc | bellard | |
1492 | 3ec9c4fc | bellard | fptemp = ST0; |
1493 | 3ec9c4fc | bellard | if ((fptemp+1.0)>0.0) { |
1494 | 3ec9c4fc | bellard | fptemp = log(fptemp+1.0) / log(2.0); /* log2(ST+1.0) */ |
1495 | 3ec9c4fc | bellard | ST1 *= fptemp; |
1496 | 3ec9c4fc | bellard | fpop(); |
1497 | 3ec9c4fc | bellard | } else {
|
1498 | 3ec9c4fc | bellard | env->fpus &= (~0x4700);
|
1499 | 3ec9c4fc | bellard | env->fpus |= 0x400;
|
1500 | 3ec9c4fc | bellard | } |
1501 | 3ec9c4fc | bellard | } |
1502 | 3ec9c4fc | bellard | |
1503 | 3ec9c4fc | bellard | void helper_fsqrt(void) |
1504 | 3ec9c4fc | bellard | { |
1505 | 3ec9c4fc | bellard | CPU86_LDouble fptemp; |
1506 | 3ec9c4fc | bellard | |
1507 | 3ec9c4fc | bellard | fptemp = ST0; |
1508 | 3ec9c4fc | bellard | if (fptemp<0.0) { |
1509 | 3ec9c4fc | bellard | env->fpus &= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */ |
1510 | 3ec9c4fc | bellard | env->fpus |= 0x400;
|
1511 | 3ec9c4fc | bellard | } |
1512 | 3ec9c4fc | bellard | ST0 = sqrt(fptemp); |
1513 | 3ec9c4fc | bellard | } |
1514 | 3ec9c4fc | bellard | |
1515 | 3ec9c4fc | bellard | void helper_fsincos(void) |
1516 | 3ec9c4fc | bellard | { |
1517 | 3ec9c4fc | bellard | CPU86_LDouble fptemp; |
1518 | 3ec9c4fc | bellard | |
1519 | 3ec9c4fc | bellard | fptemp = ST0; |
1520 | 3ec9c4fc | bellard | if ((fptemp > MAXTAN)||(fptemp < -MAXTAN)) {
|
1521 | 3ec9c4fc | bellard | env->fpus |= 0x400;
|
1522 | 3ec9c4fc | bellard | } else {
|
1523 | 3ec9c4fc | bellard | ST0 = sin(fptemp); |
1524 | 3ec9c4fc | bellard | fpush(); |
1525 | 3ec9c4fc | bellard | ST0 = cos(fptemp); |
1526 | 3ec9c4fc | bellard | env->fpus &= (~0x400); /* C2 <-- 0 */ |
1527 | 3ec9c4fc | bellard | /* the above code is for |arg| < 2**63 only */
|
1528 | 3ec9c4fc | bellard | } |
1529 | 3ec9c4fc | bellard | } |
1530 | 3ec9c4fc | bellard | |
1531 | 3ec9c4fc | bellard | void helper_frndint(void) |
1532 | 3ec9c4fc | bellard | { |
1533 | 1e5ffbed | bellard | CPU86_LDouble a; |
1534 | 1e5ffbed | bellard | |
1535 | 1e5ffbed | bellard | a = ST0; |
1536 | 1e5ffbed | bellard | #ifdef __arm__
|
1537 | 1e5ffbed | bellard | switch(env->fpuc & RC_MASK) {
|
1538 | 1e5ffbed | bellard | default:
|
1539 | 1e5ffbed | bellard | case RC_NEAR:
|
1540 | 1e5ffbed | bellard | asm("rndd %0, %1" : "=f" (a) : "f"(a)); |
1541 | 1e5ffbed | bellard | break;
|
1542 | 1e5ffbed | bellard | case RC_DOWN:
|
1543 | 1e5ffbed | bellard | asm("rnddm %0, %1" : "=f" (a) : "f"(a)); |
1544 | 1e5ffbed | bellard | break;
|
1545 | 1e5ffbed | bellard | case RC_UP:
|
1546 | 1e5ffbed | bellard | asm("rnddp %0, %1" : "=f" (a) : "f"(a)); |
1547 | 1e5ffbed | bellard | break;
|
1548 | 1e5ffbed | bellard | case RC_CHOP:
|
1549 | 1e5ffbed | bellard | asm("rnddz %0, %1" : "=f" (a) : "f"(a)); |
1550 | 1e5ffbed | bellard | break;
|
1551 | 1e5ffbed | bellard | } |
1552 | 1e5ffbed | bellard | #else
|
1553 | 1e5ffbed | bellard | a = rint(a); |
1554 | 1e5ffbed | bellard | #endif
|
1555 | 1e5ffbed | bellard | ST0 = a; |
1556 | 3ec9c4fc | bellard | } |
1557 | 3ec9c4fc | bellard | |
1558 | 3ec9c4fc | bellard | void helper_fscale(void) |
1559 | 3ec9c4fc | bellard | { |
1560 | 3ec9c4fc | bellard | CPU86_LDouble fpsrcop, fptemp; |
1561 | 3ec9c4fc | bellard | |
1562 | 3ec9c4fc | bellard | fpsrcop = 2.0; |
1563 | 3ec9c4fc | bellard | fptemp = pow(fpsrcop,ST1); |
1564 | 3ec9c4fc | bellard | ST0 *= fptemp; |
1565 | 3ec9c4fc | bellard | } |
1566 | 3ec9c4fc | bellard | |
1567 | 3ec9c4fc | bellard | void helper_fsin(void) |
1568 | 3ec9c4fc | bellard | { |
1569 | 3ec9c4fc | bellard | CPU86_LDouble fptemp; |
1570 | 3ec9c4fc | bellard | |
1571 | 3ec9c4fc | bellard | fptemp = ST0; |
1572 | 3ec9c4fc | bellard | if ((fptemp > MAXTAN)||(fptemp < -MAXTAN)) {
|
1573 | 3ec9c4fc | bellard | env->fpus |= 0x400;
|
1574 | 3ec9c4fc | bellard | } else {
|
1575 | 3ec9c4fc | bellard | ST0 = sin(fptemp); |
1576 | 3ec9c4fc | bellard | env->fpus &= (~0x400); /* C2 <-- 0 */ |
1577 | 3ec9c4fc | bellard | /* the above code is for |arg| < 2**53 only */
|
1578 | 3ec9c4fc | bellard | } |
1579 | 3ec9c4fc | bellard | } |
1580 | 3ec9c4fc | bellard | |
1581 | 3ec9c4fc | bellard | void helper_fcos(void) |
1582 | 3ec9c4fc | bellard | { |
1583 | 3ec9c4fc | bellard | CPU86_LDouble fptemp; |
1584 | 3ec9c4fc | bellard | |
1585 | 3ec9c4fc | bellard | fptemp = ST0; |
1586 | 3ec9c4fc | bellard | if((fptemp > MAXTAN)||(fptemp < -MAXTAN)) {
|
1587 | 3ec9c4fc | bellard | env->fpus |= 0x400;
|
1588 | 3ec9c4fc | bellard | } else {
|
1589 | 3ec9c4fc | bellard | ST0 = cos(fptemp); |
1590 | 3ec9c4fc | bellard | env->fpus &= (~0x400); /* C2 <-- 0 */ |
1591 | 3ec9c4fc | bellard | /* the above code is for |arg5 < 2**63 only */
|
1592 | 3ec9c4fc | bellard | } |
1593 | 3ec9c4fc | bellard | } |
1594 | 3ec9c4fc | bellard | |
1595 | 3ec9c4fc | bellard | void helper_fxam_ST0(void) |
1596 | 3ec9c4fc | bellard | { |
1597 | 3ec9c4fc | bellard | CPU86_LDoubleU temp; |
1598 | 3ec9c4fc | bellard | int expdif;
|
1599 | 3ec9c4fc | bellard | |
1600 | 3ec9c4fc | bellard | temp.d = ST0; |
1601 | 3ec9c4fc | bellard | |
1602 | 3ec9c4fc | bellard | env->fpus &= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */ |
1603 | 3ec9c4fc | bellard | if (SIGND(temp))
|
1604 | 3ec9c4fc | bellard | env->fpus |= 0x200; /* C1 <-- 1 */ |
1605 | 3ec9c4fc | bellard | |
1606 | 3ec9c4fc | bellard | expdif = EXPD(temp); |
1607 | 3ec9c4fc | bellard | if (expdif == MAXEXPD) {
|
1608 | 3ec9c4fc | bellard | if (MANTD(temp) == 0) |
1609 | 3ec9c4fc | bellard | env->fpus |= 0x500 /*Infinity*/; |
1610 | 3ec9c4fc | bellard | else
|
1611 | 3ec9c4fc | bellard | env->fpus |= 0x100 /*NaN*/; |
1612 | 3ec9c4fc | bellard | } else if (expdif == 0) { |
1613 | 3ec9c4fc | bellard | if (MANTD(temp) == 0) |
1614 | 3ec9c4fc | bellard | env->fpus |= 0x4000 /*Zero*/; |
1615 | 3ec9c4fc | bellard | else
|
1616 | 3ec9c4fc | bellard | env->fpus |= 0x4400 /*Denormal*/; |
1617 | 3ec9c4fc | bellard | } else {
|
1618 | 3ec9c4fc | bellard | env->fpus |= 0x400;
|
1619 | 3ec9c4fc | bellard | } |
1620 | 3ec9c4fc | bellard | } |
1621 | 3ec9c4fc | bellard | |
1622 | 3ec9c4fc | bellard | void helper_fstenv(uint8_t *ptr, int data32) |
1623 | 3ec9c4fc | bellard | { |
1624 | 3ec9c4fc | bellard | int fpus, fptag, exp, i;
|
1625 | 3ec9c4fc | bellard | uint64_t mant; |
1626 | 3ec9c4fc | bellard | CPU86_LDoubleU tmp; |
1627 | 3ec9c4fc | bellard | |
1628 | 3ec9c4fc | bellard | fpus = (env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11; |
1629 | 3ec9c4fc | bellard | fptag = 0;
|
1630 | 3ec9c4fc | bellard | for (i=7; i>=0; i--) { |
1631 | 3ec9c4fc | bellard | fptag <<= 2;
|
1632 | 3ec9c4fc | bellard | if (env->fptags[i]) {
|
1633 | 3ec9c4fc | bellard | fptag |= 3;
|
1634 | 3ec9c4fc | bellard | } else {
|
1635 | 3ec9c4fc | bellard | tmp.d = env->fpregs[i]; |
1636 | 3ec9c4fc | bellard | exp = EXPD(tmp); |
1637 | 3ec9c4fc | bellard | mant = MANTD(tmp); |
1638 | 3ec9c4fc | bellard | if (exp == 0 && mant == 0) { |
1639 | 3ec9c4fc | bellard | /* zero */
|
1640 | 3ec9c4fc | bellard | fptag |= 1;
|
1641 | 3ec9c4fc | bellard | } else if (exp == 0 || exp == MAXEXPD |
1642 | 3ec9c4fc | bellard | #ifdef USE_X86LDOUBLE
|
1643 | 3ec9c4fc | bellard | || (mant & (1LL << 63)) == 0 |
1644 | 3ec9c4fc | bellard | #endif
|
1645 | 3ec9c4fc | bellard | ) { |
1646 | 3ec9c4fc | bellard | /* NaNs, infinity, denormal */
|
1647 | 3ec9c4fc | bellard | fptag |= 2;
|
1648 | 3ec9c4fc | bellard | } |
1649 | 3ec9c4fc | bellard | } |
1650 | 3ec9c4fc | bellard | } |
1651 | 3ec9c4fc | bellard | if (data32) {
|
1652 | 3ec9c4fc | bellard | /* 32 bit */
|
1653 | 3ec9c4fc | bellard | stl(ptr, env->fpuc); |
1654 | 3ec9c4fc | bellard | stl(ptr + 4, fpus);
|
1655 | 3ec9c4fc | bellard | stl(ptr + 8, fptag);
|
1656 | 3ec9c4fc | bellard | stl(ptr + 12, 0); |
1657 | 3ec9c4fc | bellard | stl(ptr + 16, 0); |
1658 | 3ec9c4fc | bellard | stl(ptr + 20, 0); |
1659 | 3ec9c4fc | bellard | stl(ptr + 24, 0); |
1660 | 3ec9c4fc | bellard | } else {
|
1661 | 3ec9c4fc | bellard | /* 16 bit */
|
1662 | 3ec9c4fc | bellard | stw(ptr, env->fpuc); |
1663 | 3ec9c4fc | bellard | stw(ptr + 2, fpus);
|
1664 | 3ec9c4fc | bellard | stw(ptr + 4, fptag);
|
1665 | 3ec9c4fc | bellard | stw(ptr + 6, 0); |
1666 | 3ec9c4fc | bellard | stw(ptr + 8, 0); |
1667 | 3ec9c4fc | bellard | stw(ptr + 10, 0); |
1668 | 3ec9c4fc | bellard | stw(ptr + 12, 0); |
1669 | 3ec9c4fc | bellard | } |
1670 | 3ec9c4fc | bellard | } |
1671 | 3ec9c4fc | bellard | |
1672 | 3ec9c4fc | bellard | void helper_fldenv(uint8_t *ptr, int data32) |
1673 | 3ec9c4fc | bellard | { |
1674 | 3ec9c4fc | bellard | int i, fpus, fptag;
|
1675 | 3ec9c4fc | bellard | |
1676 | 3ec9c4fc | bellard | if (data32) {
|
1677 | 3ec9c4fc | bellard | env->fpuc = lduw(ptr); |
1678 | 3ec9c4fc | bellard | fpus = lduw(ptr + 4);
|
1679 | 3ec9c4fc | bellard | fptag = lduw(ptr + 8);
|
1680 | 3ec9c4fc | bellard | } |
1681 | 3ec9c4fc | bellard | else {
|
1682 | 3ec9c4fc | bellard | env->fpuc = lduw(ptr); |
1683 | 3ec9c4fc | bellard | fpus = lduw(ptr + 2);
|
1684 | 3ec9c4fc | bellard | fptag = lduw(ptr + 4);
|
1685 | 3ec9c4fc | bellard | } |
1686 | 3ec9c4fc | bellard | env->fpstt = (fpus >> 11) & 7; |
1687 | 3ec9c4fc | bellard | env->fpus = fpus & ~0x3800;
|
1688 | 3ec9c4fc | bellard | for(i = 0;i < 7; i++) { |
1689 | 3ec9c4fc | bellard | env->fptags[i] = ((fptag & 3) == 3); |
1690 | 3ec9c4fc | bellard | fptag >>= 2;
|
1691 | 3ec9c4fc | bellard | } |
1692 | 3ec9c4fc | bellard | } |
1693 | 3ec9c4fc | bellard | |
1694 | 3ec9c4fc | bellard | void helper_fsave(uint8_t *ptr, int data32) |
1695 | 3ec9c4fc | bellard | { |
1696 | 3ec9c4fc | bellard | CPU86_LDouble tmp; |
1697 | 3ec9c4fc | bellard | int i;
|
1698 | 3ec9c4fc | bellard | |
1699 | 3ec9c4fc | bellard | helper_fstenv(ptr, data32); |
1700 | 3ec9c4fc | bellard | |
1701 | 3ec9c4fc | bellard | ptr += (14 << data32);
|
1702 | 3ec9c4fc | bellard | for(i = 0;i < 8; i++) { |
1703 | 3ec9c4fc | bellard | tmp = ST(i); |
1704 | 3ec9c4fc | bellard | #ifdef USE_X86LDOUBLE
|
1705 | 3ec9c4fc | bellard | *(long double *)ptr = tmp; |
1706 | 3ec9c4fc | bellard | #else
|
1707 | 3ec9c4fc | bellard | helper_fstt(tmp, ptr); |
1708 | 3ec9c4fc | bellard | #endif
|
1709 | 3ec9c4fc | bellard | ptr += 10;
|
1710 | 3ec9c4fc | bellard | } |
1711 | 3ec9c4fc | bellard | |
1712 | 3ec9c4fc | bellard | /* fninit */
|
1713 | 3ec9c4fc | bellard | env->fpus = 0;
|
1714 | 3ec9c4fc | bellard | env->fpstt = 0;
|
1715 | 3ec9c4fc | bellard | env->fpuc = 0x37f;
|
1716 | 3ec9c4fc | bellard | env->fptags[0] = 1; |
1717 | 3ec9c4fc | bellard | env->fptags[1] = 1; |
1718 | 3ec9c4fc | bellard | env->fptags[2] = 1; |
1719 | 3ec9c4fc | bellard | env->fptags[3] = 1; |
1720 | 3ec9c4fc | bellard | env->fptags[4] = 1; |
1721 | 3ec9c4fc | bellard | env->fptags[5] = 1; |
1722 | 3ec9c4fc | bellard | env->fptags[6] = 1; |
1723 | 3ec9c4fc | bellard | env->fptags[7] = 1; |
1724 | 3ec9c4fc | bellard | } |
1725 | 3ec9c4fc | bellard | |
1726 | 3ec9c4fc | bellard | void helper_frstor(uint8_t *ptr, int data32) |
1727 | 3ec9c4fc | bellard | { |
1728 | 3ec9c4fc | bellard | CPU86_LDouble tmp; |
1729 | 3ec9c4fc | bellard | int i;
|
1730 | 3ec9c4fc | bellard | |
1731 | 3ec9c4fc | bellard | helper_fldenv(ptr, data32); |
1732 | 3ec9c4fc | bellard | ptr += (14 << data32);
|
1733 | 3ec9c4fc | bellard | |
1734 | 3ec9c4fc | bellard | for(i = 0;i < 8; i++) { |
1735 | 3ec9c4fc | bellard | #ifdef USE_X86LDOUBLE
|
1736 | 3ec9c4fc | bellard | tmp = *(long double *)ptr; |
1737 | 3ec9c4fc | bellard | #else
|
1738 | 3ec9c4fc | bellard | tmp = helper_fldt(ptr); |
1739 | 3ec9c4fc | bellard | #endif
|
1740 | 3ec9c4fc | bellard | ST(i) = tmp; |
1741 | 3ec9c4fc | bellard | ptr += 10;
|
1742 | 3ec9c4fc | bellard | } |
1743 | 3ec9c4fc | bellard | } |