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2c0262af FB |
1 | /* |
2 | * i386 helpers | |
3 | * | |
4 | * Copyright (c) 2003 Fabrice Bellard | |
5 | * | |
6 | * This library is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU Lesser General Public | |
8 | * License as published by the Free Software Foundation; either | |
9 | * version 2 of the License, or (at your option) any later version. | |
10 | * | |
11 | * This library is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * Lesser General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU Lesser General Public | |
17 | * License along with this library; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | */ | |
20 | #include "exec.h" | |
21 | ||
f3f2d9be FB |
22 | //#define DEBUG_PCALL |
23 | ||
8145122b FB |
24 | #if 0 |
25 | #define raise_exception_err(a, b)\ | |
26 | do {\ | |
2ee73ac3 | 27 | fprintf(logfile, "raise_exception line=%d\n", __LINE__);\ |
8145122b FB |
28 | (raise_exception_err)(a, b);\ |
29 | } while (0) | |
30 | #endif | |
31 | ||
2c0262af FB |
32 | const uint8_t parity_table[256] = { |
33 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
34 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
35 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
36 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
37 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
38 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
39 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
40 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
41 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
42 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
43 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
44 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
45 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
46 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
47 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
48 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
49 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
50 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
51 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
52 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
53 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
54 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
55 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
56 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
57 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
58 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
59 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
60 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
61 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
62 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
63 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
64 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
65 | }; | |
66 | ||
67 | /* modulo 17 table */ | |
68 | const uint8_t rclw_table[32] = { | |
69 | 0, 1, 2, 3, 4, 5, 6, 7, | |
70 | 8, 9,10,11,12,13,14,15, | |
71 | 16, 0, 1, 2, 3, 4, 5, 6, | |
72 | 7, 8, 9,10,11,12,13,14, | |
73 | }; | |
74 | ||
75 | /* modulo 9 table */ | |
76 | const uint8_t rclb_table[32] = { | |
77 | 0, 1, 2, 3, 4, 5, 6, 7, | |
78 | 8, 0, 1, 2, 3, 4, 5, 6, | |
79 | 7, 8, 0, 1, 2, 3, 4, 5, | |
80 | 6, 7, 8, 0, 1, 2, 3, 4, | |
81 | }; | |
82 | ||
83 | const CPU86_LDouble f15rk[7] = | |
84 | { | |
85 | 0.00000000000000000000L, | |
86 | 1.00000000000000000000L, | |
87 | 3.14159265358979323851L, /*pi*/ | |
88 | 0.30102999566398119523L, /*lg2*/ | |
89 | 0.69314718055994530943L, /*ln2*/ | |
90 | 1.44269504088896340739L, /*l2e*/ | |
91 | 3.32192809488736234781L, /*l2t*/ | |
92 | }; | |
93 | ||
94 | /* thread support */ | |
95 | ||
96 | spinlock_t global_cpu_lock = SPIN_LOCK_UNLOCKED; | |
97 | ||
98 | void cpu_lock(void) | |
99 | { | |
100 | spin_lock(&global_cpu_lock); | |
101 | } | |
102 | ||
103 | void cpu_unlock(void) | |
104 | { | |
105 | spin_unlock(&global_cpu_lock); | |
106 | } | |
107 | ||
108 | void cpu_loop_exit(void) | |
109 | { | |
110 | /* NOTE: the register at this point must be saved by hand because | |
111 | longjmp restore them */ | |
0d1a29f9 | 112 | regs_to_env(); |
2c0262af FB |
113 | longjmp(env->jmp_env, 1); |
114 | } | |
115 | ||
7e84c249 FB |
116 | /* return non zero if error */ |
117 | static inline int load_segment(uint32_t *e1_ptr, uint32_t *e2_ptr, | |
118 | int selector) | |
119 | { | |
120 | SegmentCache *dt; | |
121 | int index; | |
122 | uint8_t *ptr; | |
123 | ||
124 | if (selector & 0x4) | |
125 | dt = &env->ldt; | |
126 | else | |
127 | dt = &env->gdt; | |
128 | index = selector & ~7; | |
129 | if ((index + 7) > dt->limit) | |
130 | return -1; | |
131 | ptr = dt->base + index; | |
132 | *e1_ptr = ldl_kernel(ptr); | |
133 | *e2_ptr = ldl_kernel(ptr + 4); | |
134 | return 0; | |
135 | } | |
136 | ||
137 | static inline unsigned int get_seg_limit(uint32_t e1, uint32_t e2) | |
138 | { | |
139 | unsigned int limit; | |
140 | limit = (e1 & 0xffff) | (e2 & 0x000f0000); | |
141 | if (e2 & DESC_G_MASK) | |
142 | limit = (limit << 12) | 0xfff; | |
143 | return limit; | |
144 | } | |
145 | ||
146 | static inline uint8_t *get_seg_base(uint32_t e1, uint32_t e2) | |
147 | { | |
148 | return (uint8_t *)((e1 >> 16) | ((e2 & 0xff) << 16) | (e2 & 0xff000000)); | |
149 | } | |
150 | ||
151 | static inline void load_seg_cache_raw_dt(SegmentCache *sc, uint32_t e1, uint32_t e2) | |
152 | { | |
153 | sc->base = get_seg_base(e1, e2); | |
154 | sc->limit = get_seg_limit(e1, e2); | |
155 | sc->flags = e2; | |
156 | } | |
157 | ||
158 | /* init the segment cache in vm86 mode. */ | |
159 | static inline void load_seg_vm(int seg, int selector) | |
160 | { | |
161 | selector &= 0xffff; | |
162 | cpu_x86_load_seg_cache(env, seg, selector, | |
163 | (uint8_t *)(selector << 4), 0xffff, 0); | |
164 | } | |
165 | ||
2c0262af FB |
166 | static inline void get_ss_esp_from_tss(uint32_t *ss_ptr, |
167 | uint32_t *esp_ptr, int dpl) | |
168 | { | |
169 | int type, index, shift; | |
170 | ||
171 | #if 0 | |
172 | { | |
173 | int i; | |
174 | printf("TR: base=%p limit=%x\n", env->tr.base, env->tr.limit); | |
175 | for(i=0;i<env->tr.limit;i++) { | |
176 | printf("%02x ", env->tr.base[i]); | |
177 | if ((i & 7) == 7) printf("\n"); | |
178 | } | |
179 | printf("\n"); | |
180 | } | |
181 | #endif | |
182 | ||
183 | if (!(env->tr.flags & DESC_P_MASK)) | |
184 | cpu_abort(env, "invalid tss"); | |
185 | type = (env->tr.flags >> DESC_TYPE_SHIFT) & 0xf; | |
186 | if ((type & 7) != 1) | |
187 | cpu_abort(env, "invalid tss type"); | |
188 | shift = type >> 3; | |
189 | index = (dpl * 4 + 2) << shift; | |
190 | if (index + (4 << shift) - 1 > env->tr.limit) | |
191 | raise_exception_err(EXCP0A_TSS, env->tr.selector & 0xfffc); | |
192 | if (shift == 0) { | |
61382a50 FB |
193 | *esp_ptr = lduw_kernel(env->tr.base + index); |
194 | *ss_ptr = lduw_kernel(env->tr.base + index + 2); | |
2c0262af | 195 | } else { |
61382a50 FB |
196 | *esp_ptr = ldl_kernel(env->tr.base + index); |
197 | *ss_ptr = lduw_kernel(env->tr.base + index + 4); | |
2c0262af FB |
198 | } |
199 | } | |
200 | ||
7e84c249 FB |
201 | /* XXX: merge with load_seg() */ |
202 | static void tss_load_seg(int seg_reg, int selector) | |
203 | { | |
204 | uint32_t e1, e2; | |
205 | int rpl, dpl, cpl; | |
206 | ||
207 | if ((selector & 0xfffc) != 0) { | |
208 | if (load_segment(&e1, &e2, selector) != 0) | |
209 | raise_exception_err(EXCP0A_TSS, selector & 0xfffc); | |
210 | if (!(e2 & DESC_S_MASK)) | |
211 | raise_exception_err(EXCP0A_TSS, selector & 0xfffc); | |
212 | rpl = selector & 3; | |
213 | dpl = (e2 >> DESC_DPL_SHIFT) & 3; | |
214 | cpl = env->hflags & HF_CPL_MASK; | |
215 | if (seg_reg == R_CS) { | |
216 | if (!(e2 & DESC_CS_MASK)) | |
217 | raise_exception_err(EXCP0A_TSS, selector & 0xfffc); | |
218 | if (dpl != rpl) | |
219 | raise_exception_err(EXCP0A_TSS, selector & 0xfffc); | |
220 | if ((e2 & DESC_C_MASK) && dpl > rpl) | |
221 | raise_exception_err(EXCP0A_TSS, selector & 0xfffc); | |
222 | ||
223 | } else if (seg_reg == R_SS) { | |
224 | /* SS must be writable data */ | |
225 | if ((e2 & DESC_CS_MASK) || !(e2 & DESC_W_MASK)) | |
226 | raise_exception_err(EXCP0A_TSS, selector & 0xfffc); | |
227 | if (dpl != cpl || dpl != rpl) | |
228 | raise_exception_err(EXCP0A_TSS, selector & 0xfffc); | |
229 | } else { | |
230 | /* not readable code */ | |
231 | if ((e2 & DESC_CS_MASK) && !(e2 & DESC_R_MASK)) | |
232 | raise_exception_err(EXCP0A_TSS, selector & 0xfffc); | |
233 | /* if data or non conforming code, checks the rights */ | |
234 | if (((e2 >> DESC_TYPE_SHIFT) & 0xf) < 12) { | |
235 | if (dpl < cpl || dpl < rpl) | |
236 | raise_exception_err(EXCP0A_TSS, selector & 0xfffc); | |
237 | } | |
238 | } | |
239 | if (!(e2 & DESC_P_MASK)) | |
240 | raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc); | |
241 | cpu_x86_load_seg_cache(env, seg_reg, selector, | |
242 | get_seg_base(e1, e2), | |
243 | get_seg_limit(e1, e2), | |
244 | e2); | |
245 | } else { | |
246 | if (seg_reg == R_SS || seg_reg == R_CS) | |
247 | raise_exception_err(EXCP0A_TSS, selector & 0xfffc); | |
248 | } | |
249 | } | |
250 | ||
251 | #define SWITCH_TSS_JMP 0 | |
252 | #define SWITCH_TSS_IRET 1 | |
253 | #define SWITCH_TSS_CALL 2 | |
254 | ||
255 | /* XXX: restore CPU state in registers (PowerPC case) */ | |
256 | static void switch_tss(int tss_selector, | |
883da8e2 FB |
257 | uint32_t e1, uint32_t e2, int source, |
258 | uint32_t next_eip) | |
2c0262af | 259 | { |
7e84c249 FB |
260 | int tss_limit, tss_limit_max, type, old_tss_limit_max, old_type, v1, v2, i; |
261 | uint8_t *tss_base; | |
262 | uint32_t new_regs[8], new_segs[6]; | |
263 | uint32_t new_eflags, new_eip, new_cr3, new_ldt, new_trap; | |
264 | uint32_t old_eflags, eflags_mask; | |
2c0262af FB |
265 | SegmentCache *dt; |
266 | int index; | |
267 | uint8_t *ptr; | |
268 | ||
7e84c249 | 269 | type = (e2 >> DESC_TYPE_SHIFT) & 0xf; |
dc6f57fd | 270 | #ifdef DEBUG_PCALL |
e19e89a5 | 271 | if (loglevel & CPU_LOG_PCALL) |
dc6f57fd FB |
272 | fprintf(logfile, "switch_tss: sel=0x%04x type=%d src=%d\n", tss_selector, type, source); |
273 | #endif | |
7e84c249 FB |
274 | |
275 | /* if task gate, we read the TSS segment and we load it */ | |
276 | if (type == 5) { | |
277 | if (!(e2 & DESC_P_MASK)) | |
278 | raise_exception_err(EXCP0B_NOSEG, tss_selector & 0xfffc); | |
279 | tss_selector = e1 >> 16; | |
280 | if (tss_selector & 4) | |
281 | raise_exception_err(EXCP0A_TSS, tss_selector & 0xfffc); | |
282 | if (load_segment(&e1, &e2, tss_selector) != 0) | |
283 | raise_exception_err(EXCP0D_GPF, tss_selector & 0xfffc); | |
284 | if (e2 & DESC_S_MASK) | |
285 | raise_exception_err(EXCP0D_GPF, tss_selector & 0xfffc); | |
286 | type = (e2 >> DESC_TYPE_SHIFT) & 0xf; | |
287 | if ((type & 7) != 1) | |
288 | raise_exception_err(EXCP0D_GPF, tss_selector & 0xfffc); | |
289 | } | |
290 | ||
291 | if (!(e2 & DESC_P_MASK)) | |
292 | raise_exception_err(EXCP0B_NOSEG, tss_selector & 0xfffc); | |
293 | ||
294 | if (type & 8) | |
295 | tss_limit_max = 103; | |
2c0262af | 296 | else |
7e84c249 FB |
297 | tss_limit_max = 43; |
298 | tss_limit = get_seg_limit(e1, e2); | |
299 | tss_base = get_seg_base(e1, e2); | |
300 | if ((tss_selector & 4) != 0 || | |
301 | tss_limit < tss_limit_max) | |
302 | raise_exception_err(EXCP0A_TSS, tss_selector & 0xfffc); | |
303 | old_type = (env->tr.flags >> DESC_TYPE_SHIFT) & 0xf; | |
304 | if (old_type & 8) | |
305 | old_tss_limit_max = 103; | |
306 | else | |
307 | old_tss_limit_max = 43; | |
308 | ||
309 | /* read all the registers from the new TSS */ | |
310 | if (type & 8) { | |
311 | /* 32 bit */ | |
312 | new_cr3 = ldl_kernel(tss_base + 0x1c); | |
313 | new_eip = ldl_kernel(tss_base + 0x20); | |
314 | new_eflags = ldl_kernel(tss_base + 0x24); | |
315 | for(i = 0; i < 8; i++) | |
316 | new_regs[i] = ldl_kernel(tss_base + (0x28 + i * 4)); | |
317 | for(i = 0; i < 6; i++) | |
318 | new_segs[i] = lduw_kernel(tss_base + (0x48 + i * 4)); | |
319 | new_ldt = lduw_kernel(tss_base + 0x60); | |
320 | new_trap = ldl_kernel(tss_base + 0x64); | |
321 | } else { | |
322 | /* 16 bit */ | |
323 | new_cr3 = 0; | |
324 | new_eip = lduw_kernel(tss_base + 0x0e); | |
325 | new_eflags = lduw_kernel(tss_base + 0x10); | |
326 | for(i = 0; i < 8; i++) | |
327 | new_regs[i] = lduw_kernel(tss_base + (0x12 + i * 2)) | 0xffff0000; | |
328 | for(i = 0; i < 4; i++) | |
329 | new_segs[i] = lduw_kernel(tss_base + (0x22 + i * 4)); | |
330 | new_ldt = lduw_kernel(tss_base + 0x2a); | |
331 | new_segs[R_FS] = 0; | |
332 | new_segs[R_GS] = 0; | |
333 | new_trap = 0; | |
334 | } | |
335 | ||
336 | /* NOTE: we must avoid memory exceptions during the task switch, | |
337 | so we make dummy accesses before */ | |
338 | /* XXX: it can still fail in some cases, so a bigger hack is | |
339 | necessary to valid the TLB after having done the accesses */ | |
340 | ||
341 | v1 = ldub_kernel(env->tr.base); | |
342 | v2 = ldub(env->tr.base + old_tss_limit_max); | |
343 | stb_kernel(env->tr.base, v1); | |
344 | stb_kernel(env->tr.base + old_tss_limit_max, v2); | |
345 | ||
346 | /* clear busy bit (it is restartable) */ | |
347 | if (source == SWITCH_TSS_JMP || source == SWITCH_TSS_IRET) { | |
348 | uint8_t *ptr; | |
349 | uint32_t e2; | |
883da8e2 | 350 | ptr = env->gdt.base + (env->tr.selector & ~7); |
7e84c249 FB |
351 | e2 = ldl_kernel(ptr + 4); |
352 | e2 &= ~DESC_TSS_BUSY_MASK; | |
353 | stl_kernel(ptr + 4, e2); | |
354 | } | |
355 | old_eflags = compute_eflags(); | |
356 | if (source == SWITCH_TSS_IRET) | |
357 | old_eflags &= ~NT_MASK; | |
358 | ||
359 | /* save the current state in the old TSS */ | |
360 | if (type & 8) { | |
361 | /* 32 bit */ | |
883da8e2 | 362 | stl_kernel(env->tr.base + 0x20, next_eip); |
7e84c249 | 363 | stl_kernel(env->tr.base + 0x24, old_eflags); |
0d1a29f9 FB |
364 | stl_kernel(env->tr.base + (0x28 + 0 * 4), EAX); |
365 | stl_kernel(env->tr.base + (0x28 + 1 * 4), ECX); | |
366 | stl_kernel(env->tr.base + (0x28 + 2 * 4), EDX); | |
367 | stl_kernel(env->tr.base + (0x28 + 3 * 4), EBX); | |
368 | stl_kernel(env->tr.base + (0x28 + 4 * 4), ESP); | |
369 | stl_kernel(env->tr.base + (0x28 + 5 * 4), EBP); | |
370 | stl_kernel(env->tr.base + (0x28 + 6 * 4), ESI); | |
371 | stl_kernel(env->tr.base + (0x28 + 7 * 4), EDI); | |
7e84c249 FB |
372 | for(i = 0; i < 6; i++) |
373 | stw_kernel(env->tr.base + (0x48 + i * 4), env->segs[i].selector); | |
374 | } else { | |
375 | /* 16 bit */ | |
883da8e2 | 376 | stw_kernel(env->tr.base + 0x0e, next_eip); |
7e84c249 | 377 | stw_kernel(env->tr.base + 0x10, old_eflags); |
0d1a29f9 FB |
378 | stw_kernel(env->tr.base + (0x12 + 0 * 2), EAX); |
379 | stw_kernel(env->tr.base + (0x12 + 1 * 2), ECX); | |
380 | stw_kernel(env->tr.base + (0x12 + 2 * 2), EDX); | |
381 | stw_kernel(env->tr.base + (0x12 + 3 * 2), EBX); | |
382 | stw_kernel(env->tr.base + (0x12 + 4 * 2), ESP); | |
383 | stw_kernel(env->tr.base + (0x12 + 5 * 2), EBP); | |
384 | stw_kernel(env->tr.base + (0x12 + 6 * 2), ESI); | |
385 | stw_kernel(env->tr.base + (0x12 + 7 * 2), EDI); | |
7e84c249 FB |
386 | for(i = 0; i < 4; i++) |
387 | stw_kernel(env->tr.base + (0x22 + i * 4), env->segs[i].selector); | |
388 | } | |
389 | ||
390 | /* now if an exception occurs, it will occurs in the next task | |
391 | context */ | |
392 | ||
393 | if (source == SWITCH_TSS_CALL) { | |
394 | stw_kernel(tss_base, env->tr.selector); | |
395 | new_eflags |= NT_MASK; | |
396 | } | |
397 | ||
398 | /* set busy bit */ | |
399 | if (source == SWITCH_TSS_JMP || source == SWITCH_TSS_CALL) { | |
400 | uint8_t *ptr; | |
401 | uint32_t e2; | |
883da8e2 | 402 | ptr = env->gdt.base + (tss_selector & ~7); |
7e84c249 FB |
403 | e2 = ldl_kernel(ptr + 4); |
404 | e2 |= DESC_TSS_BUSY_MASK; | |
405 | stl_kernel(ptr + 4, e2); | |
406 | } | |
407 | ||
408 | /* set the new CPU state */ | |
409 | /* from this point, any exception which occurs can give problems */ | |
410 | env->cr[0] |= CR0_TS_MASK; | |
883da8e2 | 411 | env->hflags |= HF_TS_MASK; |
7e84c249 FB |
412 | env->tr.selector = tss_selector; |
413 | env->tr.base = tss_base; | |
414 | env->tr.limit = tss_limit; | |
415 | env->tr.flags = e2 & ~DESC_TSS_BUSY_MASK; | |
416 | ||
417 | if ((type & 8) && (env->cr[0] & CR0_PG_MASK)) { | |
1ac157da | 418 | cpu_x86_update_cr3(env, new_cr3); |
7e84c249 FB |
419 | } |
420 | ||
421 | /* load all registers without an exception, then reload them with | |
422 | possible exception */ | |
423 | env->eip = new_eip; | |
4136f33c | 424 | eflags_mask = TF_MASK | AC_MASK | ID_MASK | |
8145122b | 425 | IF_MASK | IOPL_MASK | VM_MASK | RF_MASK | NT_MASK; |
7e84c249 FB |
426 | if (!(type & 8)) |
427 | eflags_mask &= 0xffff; | |
428 | load_eflags(new_eflags, eflags_mask); | |
0d1a29f9 FB |
429 | /* XXX: what to do in 16 bit case ? */ |
430 | EAX = new_regs[0]; | |
431 | ECX = new_regs[1]; | |
432 | EDX = new_regs[2]; | |
433 | EBX = new_regs[3]; | |
434 | ESP = new_regs[4]; | |
435 | EBP = new_regs[5]; | |
436 | ESI = new_regs[6]; | |
437 | EDI = new_regs[7]; | |
7e84c249 FB |
438 | if (new_eflags & VM_MASK) { |
439 | for(i = 0; i < 6; i++) | |
440 | load_seg_vm(i, new_segs[i]); | |
441 | /* in vm86, CPL is always 3 */ | |
442 | cpu_x86_set_cpl(env, 3); | |
443 | } else { | |
444 | /* CPL is set the RPL of CS */ | |
445 | cpu_x86_set_cpl(env, new_segs[R_CS] & 3); | |
446 | /* first just selectors as the rest may trigger exceptions */ | |
447 | for(i = 0; i < 6; i++) | |
448 | cpu_x86_load_seg_cache(env, i, new_segs[i], NULL, 0, 0); | |
449 | } | |
450 | ||
451 | env->ldt.selector = new_ldt & ~4; | |
452 | env->ldt.base = NULL; | |
453 | env->ldt.limit = 0; | |
454 | env->ldt.flags = 0; | |
455 | ||
456 | /* load the LDT */ | |
457 | if (new_ldt & 4) | |
458 | raise_exception_err(EXCP0A_TSS, new_ldt & 0xfffc); | |
459 | ||
8145122b FB |
460 | if ((new_ldt & 0xfffc) != 0) { |
461 | dt = &env->gdt; | |
462 | index = new_ldt & ~7; | |
463 | if ((index + 7) > dt->limit) | |
464 | raise_exception_err(EXCP0A_TSS, new_ldt & 0xfffc); | |
465 | ptr = dt->base + index; | |
466 | e1 = ldl_kernel(ptr); | |
467 | e2 = ldl_kernel(ptr + 4); | |
468 | if ((e2 & DESC_S_MASK) || ((e2 >> DESC_TYPE_SHIFT) & 0xf) != 2) | |
469 | raise_exception_err(EXCP0A_TSS, new_ldt & 0xfffc); | |
470 | if (!(e2 & DESC_P_MASK)) | |
471 | raise_exception_err(EXCP0A_TSS, new_ldt & 0xfffc); | |
472 | load_seg_cache_raw_dt(&env->ldt, e1, e2); | |
473 | } | |
7e84c249 FB |
474 | |
475 | /* load the segments */ | |
476 | if (!(new_eflags & VM_MASK)) { | |
477 | tss_load_seg(R_CS, new_segs[R_CS]); | |
478 | tss_load_seg(R_SS, new_segs[R_SS]); | |
479 | tss_load_seg(R_ES, new_segs[R_ES]); | |
480 | tss_load_seg(R_DS, new_segs[R_DS]); | |
481 | tss_load_seg(R_FS, new_segs[R_FS]); | |
482 | tss_load_seg(R_GS, new_segs[R_GS]); | |
483 | } | |
484 | ||
485 | /* check that EIP is in the CS segment limits */ | |
486 | if (new_eip > env->segs[R_CS].limit) { | |
883da8e2 | 487 | /* XXX: different exception if CALL ? */ |
7e84c249 FB |
488 | raise_exception_err(EXCP0D_GPF, 0); |
489 | } | |
2c0262af | 490 | } |
7e84c249 FB |
491 | |
492 | /* check if Port I/O is allowed in TSS */ | |
493 | static inline void check_io(int addr, int size) | |
2c0262af | 494 | { |
7e84c249 FB |
495 | int io_offset, val, mask; |
496 | ||
497 | /* TSS must be a valid 32 bit one */ | |
498 | if (!(env->tr.flags & DESC_P_MASK) || | |
499 | ((env->tr.flags >> DESC_TYPE_SHIFT) & 0xf) != 9 || | |
500 | env->tr.limit < 103) | |
501 | goto fail; | |
502 | io_offset = lduw_kernel(env->tr.base + 0x66); | |
503 | io_offset += (addr >> 3); | |
504 | /* Note: the check needs two bytes */ | |
505 | if ((io_offset + 1) > env->tr.limit) | |
506 | goto fail; | |
507 | val = lduw_kernel(env->tr.base + io_offset); | |
508 | val >>= (addr & 7); | |
509 | mask = (1 << size) - 1; | |
510 | /* all bits must be zero to allow the I/O */ | |
511 | if ((val & mask) != 0) { | |
512 | fail: | |
513 | raise_exception_err(EXCP0D_GPF, 0); | |
514 | } | |
2c0262af FB |
515 | } |
516 | ||
7e84c249 | 517 | void check_iob_T0(void) |
2c0262af | 518 | { |
7e84c249 | 519 | check_io(T0, 1); |
2c0262af FB |
520 | } |
521 | ||
7e84c249 | 522 | void check_iow_T0(void) |
2c0262af | 523 | { |
7e84c249 | 524 | check_io(T0, 2); |
2c0262af FB |
525 | } |
526 | ||
7e84c249 | 527 | void check_iol_T0(void) |
2c0262af | 528 | { |
7e84c249 FB |
529 | check_io(T0, 4); |
530 | } | |
531 | ||
532 | void check_iob_DX(void) | |
533 | { | |
534 | check_io(EDX & 0xffff, 1); | |
535 | } | |
536 | ||
537 | void check_iow_DX(void) | |
538 | { | |
539 | check_io(EDX & 0xffff, 2); | |
540 | } | |
541 | ||
542 | void check_iol_DX(void) | |
543 | { | |
544 | check_io(EDX & 0xffff, 4); | |
2c0262af FB |
545 | } |
546 | ||
891b38e4 FB |
547 | static inline unsigned int get_sp_mask(unsigned int e2) |
548 | { | |
549 | if (e2 & DESC_B_MASK) | |
550 | return 0xffffffff; | |
551 | else | |
552 | return 0xffff; | |
553 | } | |
554 | ||
555 | /* XXX: add a is_user flag to have proper security support */ | |
556 | #define PUSHW(ssp, sp, sp_mask, val)\ | |
557 | {\ | |
558 | sp -= 2;\ | |
559 | stw_kernel((ssp) + (sp & (sp_mask)), (val));\ | |
560 | } | |
561 | ||
562 | #define PUSHL(ssp, sp, sp_mask, val)\ | |
563 | {\ | |
564 | sp -= 4;\ | |
565 | stl_kernel((ssp) + (sp & (sp_mask)), (val));\ | |
566 | } | |
567 | ||
568 | #define POPW(ssp, sp, sp_mask, val)\ | |
569 | {\ | |
570 | val = lduw_kernel((ssp) + (sp & (sp_mask)));\ | |
571 | sp += 2;\ | |
572 | } | |
573 | ||
574 | #define POPL(ssp, sp, sp_mask, val)\ | |
575 | {\ | |
576 | val = ldl_kernel((ssp) + (sp & (sp_mask)));\ | |
577 | sp += 4;\ | |
578 | } | |
579 | ||
2c0262af FB |
580 | /* protected mode interrupt */ |
581 | static void do_interrupt_protected(int intno, int is_int, int error_code, | |
582 | unsigned int next_eip, int is_hw) | |
583 | { | |
584 | SegmentCache *dt; | |
585 | uint8_t *ptr, *ssp; | |
891b38e4 | 586 | int type, dpl, selector, ss_dpl, cpl, sp_mask; |
2c0262af | 587 | int has_error_code, new_stack, shift; |
891b38e4 FB |
588 | uint32_t e1, e2, offset, ss, esp, ss_e1, ss_e2; |
589 | uint32_t old_eip; | |
2c0262af | 590 | |
7e84c249 FB |
591 | has_error_code = 0; |
592 | if (!is_int && !is_hw) { | |
593 | switch(intno) { | |
594 | case 8: | |
595 | case 10: | |
596 | case 11: | |
597 | case 12: | |
598 | case 13: | |
599 | case 14: | |
600 | case 17: | |
601 | has_error_code = 1; | |
602 | break; | |
603 | } | |
604 | } | |
883da8e2 FB |
605 | if (is_int) |
606 | old_eip = next_eip; | |
607 | else | |
608 | old_eip = env->eip; | |
7e84c249 | 609 | |
2c0262af FB |
610 | dt = &env->idt; |
611 | if (intno * 8 + 7 > dt->limit) | |
612 | raise_exception_err(EXCP0D_GPF, intno * 8 + 2); | |
613 | ptr = dt->base + intno * 8; | |
61382a50 FB |
614 | e1 = ldl_kernel(ptr); |
615 | e2 = ldl_kernel(ptr + 4); | |
2c0262af FB |
616 | /* check gate type */ |
617 | type = (e2 >> DESC_TYPE_SHIFT) & 0x1f; | |
618 | switch(type) { | |
619 | case 5: /* task gate */ | |
7e84c249 FB |
620 | /* must do that check here to return the correct error code */ |
621 | if (!(e2 & DESC_P_MASK)) | |
622 | raise_exception_err(EXCP0B_NOSEG, intno * 8 + 2); | |
883da8e2 | 623 | switch_tss(intno * 8, e1, e2, SWITCH_TSS_CALL, old_eip); |
7e84c249 FB |
624 | if (has_error_code) { |
625 | int mask; | |
626 | /* push the error code */ | |
627 | shift = (env->segs[R_CS].flags >> DESC_B_SHIFT) & 1; | |
628 | if (env->segs[R_SS].flags & DESC_B_MASK) | |
629 | mask = 0xffffffff; | |
630 | else | |
631 | mask = 0xffff; | |
0d1a29f9 | 632 | esp = (ESP - (2 << shift)) & mask; |
7e84c249 FB |
633 | ssp = env->segs[R_SS].base + esp; |
634 | if (shift) | |
635 | stl_kernel(ssp, error_code); | |
636 | else | |
637 | stw_kernel(ssp, error_code); | |
0d1a29f9 | 638 | ESP = (esp & mask) | (ESP & ~mask); |
7e84c249 FB |
639 | } |
640 | return; | |
2c0262af FB |
641 | case 6: /* 286 interrupt gate */ |
642 | case 7: /* 286 trap gate */ | |
643 | case 14: /* 386 interrupt gate */ | |
644 | case 15: /* 386 trap gate */ | |
645 | break; | |
646 | default: | |
647 | raise_exception_err(EXCP0D_GPF, intno * 8 + 2); | |
648 | break; | |
649 | } | |
650 | dpl = (e2 >> DESC_DPL_SHIFT) & 3; | |
651 | cpl = env->hflags & HF_CPL_MASK; | |
652 | /* check privledge if software int */ | |
653 | if (is_int && dpl < cpl) | |
654 | raise_exception_err(EXCP0D_GPF, intno * 8 + 2); | |
655 | /* check valid bit */ | |
656 | if (!(e2 & DESC_P_MASK)) | |
657 | raise_exception_err(EXCP0B_NOSEG, intno * 8 + 2); | |
658 | selector = e1 >> 16; | |
659 | offset = (e2 & 0xffff0000) | (e1 & 0x0000ffff); | |
660 | if ((selector & 0xfffc) == 0) | |
661 | raise_exception_err(EXCP0D_GPF, 0); | |
662 | ||
663 | if (load_segment(&e1, &e2, selector) != 0) | |
664 | raise_exception_err(EXCP0D_GPF, selector & 0xfffc); | |
665 | if (!(e2 & DESC_S_MASK) || !(e2 & (DESC_CS_MASK))) | |
666 | raise_exception_err(EXCP0D_GPF, selector & 0xfffc); | |
667 | dpl = (e2 >> DESC_DPL_SHIFT) & 3; | |
668 | if (dpl > cpl) | |
669 | raise_exception_err(EXCP0D_GPF, selector & 0xfffc); | |
670 | if (!(e2 & DESC_P_MASK)) | |
671 | raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc); | |
672 | if (!(e2 & DESC_C_MASK) && dpl < cpl) { | |
673 | /* to inner priviledge */ | |
674 | get_ss_esp_from_tss(&ss, &esp, dpl); | |
675 | if ((ss & 0xfffc) == 0) | |
676 | raise_exception_err(EXCP0A_TSS, ss & 0xfffc); | |
677 | if ((ss & 3) != dpl) | |
678 | raise_exception_err(EXCP0A_TSS, ss & 0xfffc); | |
679 | if (load_segment(&ss_e1, &ss_e2, ss) != 0) | |
680 | raise_exception_err(EXCP0A_TSS, ss & 0xfffc); | |
681 | ss_dpl = (ss_e2 >> DESC_DPL_SHIFT) & 3; | |
682 | if (ss_dpl != dpl) | |
683 | raise_exception_err(EXCP0A_TSS, ss & 0xfffc); | |
684 | if (!(ss_e2 & DESC_S_MASK) || | |
685 | (ss_e2 & DESC_CS_MASK) || | |
686 | !(ss_e2 & DESC_W_MASK)) | |
687 | raise_exception_err(EXCP0A_TSS, ss & 0xfffc); | |
688 | if (!(ss_e2 & DESC_P_MASK)) | |
689 | raise_exception_err(EXCP0A_TSS, ss & 0xfffc); | |
690 | new_stack = 1; | |
891b38e4 FB |
691 | sp_mask = get_sp_mask(ss_e2); |
692 | ssp = get_seg_base(ss_e1, ss_e2); | |
2c0262af FB |
693 | } else if ((e2 & DESC_C_MASK) || dpl == cpl) { |
694 | /* to same priviledge */ | |
8e682019 FB |
695 | if (env->eflags & VM_MASK) |
696 | raise_exception_err(EXCP0D_GPF, selector & 0xfffc); | |
2c0262af | 697 | new_stack = 0; |
891b38e4 FB |
698 | sp_mask = get_sp_mask(env->segs[R_SS].flags); |
699 | ssp = env->segs[R_SS].base; | |
700 | esp = ESP; | |
4796f5e9 | 701 | dpl = cpl; |
2c0262af FB |
702 | } else { |
703 | raise_exception_err(EXCP0D_GPF, selector & 0xfffc); | |
704 | new_stack = 0; /* avoid warning */ | |
891b38e4 FB |
705 | sp_mask = 0; /* avoid warning */ |
706 | ssp = NULL; /* avoid warning */ | |
707 | esp = 0; /* avoid warning */ | |
2c0262af FB |
708 | } |
709 | ||
710 | shift = type >> 3; | |
891b38e4 FB |
711 | |
712 | #if 0 | |
713 | /* XXX: check that enough room is available */ | |
2c0262af FB |
714 | push_size = 6 + (new_stack << 2) + (has_error_code << 1); |
715 | if (env->eflags & VM_MASK) | |
716 | push_size += 8; | |
717 | push_size <<= shift; | |
891b38e4 | 718 | #endif |
2c0262af | 719 | if (shift == 1) { |
2c0262af | 720 | if (new_stack) { |
8e682019 FB |
721 | if (env->eflags & VM_MASK) { |
722 | PUSHL(ssp, esp, sp_mask, env->segs[R_GS].selector); | |
723 | PUSHL(ssp, esp, sp_mask, env->segs[R_FS].selector); | |
724 | PUSHL(ssp, esp, sp_mask, env->segs[R_DS].selector); | |
725 | PUSHL(ssp, esp, sp_mask, env->segs[R_ES].selector); | |
726 | } | |
891b38e4 FB |
727 | PUSHL(ssp, esp, sp_mask, env->segs[R_SS].selector); |
728 | PUSHL(ssp, esp, sp_mask, ESP); | |
2c0262af | 729 | } |
891b38e4 FB |
730 | PUSHL(ssp, esp, sp_mask, compute_eflags()); |
731 | PUSHL(ssp, esp, sp_mask, env->segs[R_CS].selector); | |
732 | PUSHL(ssp, esp, sp_mask, old_eip); | |
2c0262af | 733 | if (has_error_code) { |
891b38e4 | 734 | PUSHL(ssp, esp, sp_mask, error_code); |
2c0262af FB |
735 | } |
736 | } else { | |
737 | if (new_stack) { | |
8e682019 FB |
738 | if (env->eflags & VM_MASK) { |
739 | PUSHW(ssp, esp, sp_mask, env->segs[R_GS].selector); | |
740 | PUSHW(ssp, esp, sp_mask, env->segs[R_FS].selector); | |
741 | PUSHW(ssp, esp, sp_mask, env->segs[R_DS].selector); | |
742 | PUSHW(ssp, esp, sp_mask, env->segs[R_ES].selector); | |
743 | } | |
891b38e4 FB |
744 | PUSHW(ssp, esp, sp_mask, env->segs[R_SS].selector); |
745 | PUSHW(ssp, esp, sp_mask, ESP); | |
2c0262af | 746 | } |
891b38e4 FB |
747 | PUSHW(ssp, esp, sp_mask, compute_eflags()); |
748 | PUSHW(ssp, esp, sp_mask, env->segs[R_CS].selector); | |
749 | PUSHW(ssp, esp, sp_mask, old_eip); | |
2c0262af | 750 | if (has_error_code) { |
891b38e4 | 751 | PUSHW(ssp, esp, sp_mask, error_code); |
2c0262af FB |
752 | } |
753 | } | |
754 | ||
891b38e4 | 755 | if (new_stack) { |
8e682019 | 756 | if (env->eflags & VM_MASK) { |
8145122b FB |
757 | cpu_x86_load_seg_cache(env, R_ES, 0, NULL, 0, 0); |
758 | cpu_x86_load_seg_cache(env, R_DS, 0, NULL, 0, 0); | |
759 | cpu_x86_load_seg_cache(env, R_FS, 0, NULL, 0, 0); | |
760 | cpu_x86_load_seg_cache(env, R_GS, 0, NULL, 0, 0); | |
8e682019 | 761 | } |
891b38e4 FB |
762 | ss = (ss & ~3) | dpl; |
763 | cpu_x86_load_seg_cache(env, R_SS, ss, | |
764 | ssp, get_seg_limit(ss_e1, ss_e2), ss_e2); | |
765 | } | |
766 | ESP = (ESP & ~sp_mask) | (esp & sp_mask); | |
767 | ||
768 | selector = (selector & ~3) | dpl; | |
769 | cpu_x86_load_seg_cache(env, R_CS, selector, | |
770 | get_seg_base(e1, e2), | |
771 | get_seg_limit(e1, e2), | |
772 | e2); | |
773 | cpu_x86_set_cpl(env, dpl); | |
774 | env->eip = offset; | |
775 | ||
2c0262af FB |
776 | /* interrupt gate clear IF mask */ |
777 | if ((type & 1) == 0) { | |
778 | env->eflags &= ~IF_MASK; | |
779 | } | |
780 | env->eflags &= ~(TF_MASK | VM_MASK | RF_MASK | NT_MASK); | |
781 | } | |
782 | ||
783 | /* real mode interrupt */ | |
784 | static void do_interrupt_real(int intno, int is_int, int error_code, | |
4136f33c | 785 | unsigned int next_eip) |
2c0262af FB |
786 | { |
787 | SegmentCache *dt; | |
788 | uint8_t *ptr, *ssp; | |
789 | int selector; | |
790 | uint32_t offset, esp; | |
791 | uint32_t old_cs, old_eip; | |
792 | ||
793 | /* real mode (simpler !) */ | |
794 | dt = &env->idt; | |
795 | if (intno * 4 + 3 > dt->limit) | |
796 | raise_exception_err(EXCP0D_GPF, intno * 8 + 2); | |
797 | ptr = dt->base + intno * 4; | |
61382a50 FB |
798 | offset = lduw_kernel(ptr); |
799 | selector = lduw_kernel(ptr + 2); | |
2c0262af FB |
800 | esp = ESP; |
801 | ssp = env->segs[R_SS].base; | |
802 | if (is_int) | |
803 | old_eip = next_eip; | |
804 | else | |
805 | old_eip = env->eip; | |
806 | old_cs = env->segs[R_CS].selector; | |
891b38e4 FB |
807 | /* XXX: use SS segment size ? */ |
808 | PUSHW(ssp, esp, 0xffff, compute_eflags()); | |
809 | PUSHW(ssp, esp, 0xffff, old_cs); | |
810 | PUSHW(ssp, esp, 0xffff, old_eip); | |
2c0262af FB |
811 | |
812 | /* update processor state */ | |
813 | ESP = (ESP & ~0xffff) | (esp & 0xffff); | |
814 | env->eip = offset; | |
815 | env->segs[R_CS].selector = selector; | |
816 | env->segs[R_CS].base = (uint8_t *)(selector << 4); | |
817 | env->eflags &= ~(IF_MASK | TF_MASK | AC_MASK | RF_MASK); | |
818 | } | |
819 | ||
820 | /* fake user mode interrupt */ | |
821 | void do_interrupt_user(int intno, int is_int, int error_code, | |
822 | unsigned int next_eip) | |
823 | { | |
824 | SegmentCache *dt; | |
825 | uint8_t *ptr; | |
826 | int dpl, cpl; | |
827 | uint32_t e2; | |
828 | ||
829 | dt = &env->idt; | |
830 | ptr = dt->base + (intno * 8); | |
61382a50 | 831 | e2 = ldl_kernel(ptr + 4); |
2c0262af FB |
832 | |
833 | dpl = (e2 >> DESC_DPL_SHIFT) & 3; | |
834 | cpl = env->hflags & HF_CPL_MASK; | |
835 | /* check privledge if software int */ | |
836 | if (is_int && dpl < cpl) | |
837 | raise_exception_err(EXCP0D_GPF, intno * 8 + 2); | |
838 | ||
839 | /* Since we emulate only user space, we cannot do more than | |
840 | exiting the emulation with the suitable exception and error | |
841 | code */ | |
842 | if (is_int) | |
843 | EIP = next_eip; | |
844 | } | |
845 | ||
846 | /* | |
e19e89a5 | 847 | * Begin execution of an interruption. is_int is TRUE if coming from |
2c0262af FB |
848 | * the int instruction. next_eip is the EIP value AFTER the interrupt |
849 | * instruction. It is only relevant if is_int is TRUE. | |
850 | */ | |
851 | void do_interrupt(int intno, int is_int, int error_code, | |
852 | unsigned int next_eip, int is_hw) | |
853 | { | |
e19e89a5 FB |
854 | #ifdef DEBUG_PCALL |
855 | if (loglevel & (CPU_LOG_PCALL | CPU_LOG_INT)) { | |
856 | if ((env->cr[0] & CR0_PE_MASK)) { | |
857 | static int count; | |
2ee73ac3 | 858 | fprintf(logfile, "%6d: v=%02x e=%04x i=%d cpl=%d IP=%04x:%08x pc=%08x SP=%04x:%08x", |
dc6f57fd FB |
859 | count, intno, error_code, is_int, |
860 | env->hflags & HF_CPL_MASK, | |
861 | env->segs[R_CS].selector, EIP, | |
2ee73ac3 | 862 | (int)env->segs[R_CS].base + EIP, |
8145122b FB |
863 | env->segs[R_SS].selector, ESP); |
864 | if (intno == 0x0e) { | |
e19e89a5 | 865 | fprintf(logfile, " CR2=%08x", env->cr[2]); |
8145122b | 866 | } else { |
0d1a29f9 | 867 | fprintf(logfile, " EAX=%08x", EAX); |
8145122b | 868 | } |
e19e89a5 | 869 | fprintf(logfile, "\n"); |
dc6f57fd | 870 | #if 0 |
7fe48483 | 871 | cpu_dump_state(env, logfile, fprintf, X86_DUMP_CCOP); |
e19e89a5 FB |
872 | { |
873 | int i; | |
874 | uint8_t *ptr; | |
875 | fprintf(logfile, " code="); | |
876 | ptr = env->segs[R_CS].base + env->eip; | |
877 | for(i = 0; i < 16; i++) { | |
878 | fprintf(logfile, " %02x", ldub(ptr + i)); | |
dc6f57fd | 879 | } |
e19e89a5 | 880 | fprintf(logfile, "\n"); |
dc6f57fd | 881 | } |
8e682019 | 882 | #endif |
e19e89a5 | 883 | count++; |
4136f33c | 884 | } |
4136f33c FB |
885 | } |
886 | #endif | |
2c0262af FB |
887 | if (env->cr[0] & CR0_PE_MASK) { |
888 | do_interrupt_protected(intno, is_int, error_code, next_eip, is_hw); | |
889 | } else { | |
890 | do_interrupt_real(intno, is_int, error_code, next_eip); | |
891 | } | |
892 | } | |
893 | ||
894 | /* | |
895 | * Signal an interruption. It is executed in the main CPU loop. | |
896 | * is_int is TRUE if coming from the int instruction. next_eip is the | |
897 | * EIP value AFTER the interrupt instruction. It is only relevant if | |
898 | * is_int is TRUE. | |
899 | */ | |
900 | void raise_interrupt(int intno, int is_int, int error_code, | |
901 | unsigned int next_eip) | |
902 | { | |
903 | env->exception_index = intno; | |
904 | env->error_code = error_code; | |
905 | env->exception_is_int = is_int; | |
906 | env->exception_next_eip = next_eip; | |
907 | cpu_loop_exit(); | |
908 | } | |
909 | ||
0d1a29f9 FB |
910 | /* same as raise_exception_err, but do not restore global registers */ |
911 | static void raise_exception_err_norestore(int exception_index, int error_code) | |
912 | { | |
913 | env->exception_index = exception_index; | |
914 | env->error_code = error_code; | |
915 | env->exception_is_int = 0; | |
916 | env->exception_next_eip = 0; | |
917 | longjmp(env->jmp_env, 1); | |
918 | } | |
919 | ||
2c0262af | 920 | /* shortcuts to generate exceptions */ |
8145122b FB |
921 | |
922 | void (raise_exception_err)(int exception_index, int error_code) | |
2c0262af FB |
923 | { |
924 | raise_interrupt(exception_index, 0, error_code, 0); | |
925 | } | |
926 | ||
927 | void raise_exception(int exception_index) | |
928 | { | |
929 | raise_interrupt(exception_index, 0, 0, 0); | |
930 | } | |
931 | ||
932 | #ifdef BUGGY_GCC_DIV64 | |
933 | /* gcc 2.95.4 on PowerPC does not seem to like using __udivdi3, so we | |
934 | call it from another function */ | |
935 | uint32_t div64(uint32_t *q_ptr, uint64_t num, uint32_t den) | |
936 | { | |
937 | *q_ptr = num / den; | |
938 | return num % den; | |
939 | } | |
940 | ||
941 | int32_t idiv64(int32_t *q_ptr, int64_t num, int32_t den) | |
942 | { | |
943 | *q_ptr = num / den; | |
944 | return num % den; | |
945 | } | |
946 | #endif | |
947 | ||
948 | void helper_divl_EAX_T0(uint32_t eip) | |
949 | { | |
950 | unsigned int den, q, r; | |
951 | uint64_t num; | |
952 | ||
953 | num = EAX | ((uint64_t)EDX << 32); | |
954 | den = T0; | |
955 | if (den == 0) { | |
956 | EIP = eip; | |
957 | raise_exception(EXCP00_DIVZ); | |
958 | } | |
959 | #ifdef BUGGY_GCC_DIV64 | |
960 | r = div64(&q, num, den); | |
961 | #else | |
962 | q = (num / den); | |
963 | r = (num % den); | |
964 | #endif | |
965 | EAX = q; | |
966 | EDX = r; | |
967 | } | |
968 | ||
969 | void helper_idivl_EAX_T0(uint32_t eip) | |
970 | { | |
971 | int den, q, r; | |
972 | int64_t num; | |
973 | ||
974 | num = EAX | ((uint64_t)EDX << 32); | |
975 | den = T0; | |
976 | if (den == 0) { | |
977 | EIP = eip; | |
978 | raise_exception(EXCP00_DIVZ); | |
979 | } | |
980 | #ifdef BUGGY_GCC_DIV64 | |
981 | r = idiv64(&q, num, den); | |
982 | #else | |
983 | q = (num / den); | |
984 | r = (num % den); | |
985 | #endif | |
986 | EAX = q; | |
987 | EDX = r; | |
988 | } | |
989 | ||
990 | void helper_cmpxchg8b(void) | |
991 | { | |
992 | uint64_t d; | |
993 | int eflags; | |
994 | ||
995 | eflags = cc_table[CC_OP].compute_all(); | |
996 | d = ldq((uint8_t *)A0); | |
997 | if (d == (((uint64_t)EDX << 32) | EAX)) { | |
998 | stq((uint8_t *)A0, ((uint64_t)ECX << 32) | EBX); | |
999 | eflags |= CC_Z; | |
1000 | } else { | |
1001 | EDX = d >> 32; | |
1002 | EAX = d; | |
1003 | eflags &= ~CC_Z; | |
1004 | } | |
1005 | CC_SRC = eflags; | |
1006 | } | |
1007 | ||
2c0262af FB |
1008 | #define CPUID_FP87 (1 << 0) |
1009 | #define CPUID_VME (1 << 1) | |
1010 | #define CPUID_DE (1 << 2) | |
1011 | #define CPUID_PSE (1 << 3) | |
1012 | #define CPUID_TSC (1 << 4) | |
1013 | #define CPUID_MSR (1 << 5) | |
1014 | #define CPUID_PAE (1 << 6) | |
1015 | #define CPUID_MCE (1 << 7) | |
1016 | #define CPUID_CX8 (1 << 8) | |
1017 | #define CPUID_APIC (1 << 9) | |
1018 | #define CPUID_SEP (1 << 11) /* sysenter/sysexit */ | |
1019 | #define CPUID_MTRR (1 << 12) | |
1020 | #define CPUID_PGE (1 << 13) | |
1021 | #define CPUID_MCA (1 << 14) | |
1022 | #define CPUID_CMOV (1 << 15) | |
1023 | /* ... */ | |
1024 | #define CPUID_MMX (1 << 23) | |
1025 | #define CPUID_FXSR (1 << 24) | |
1026 | #define CPUID_SSE (1 << 25) | |
1027 | #define CPUID_SSE2 (1 << 26) | |
1028 | ||
1029 | void helper_cpuid(void) | |
1030 | { | |
8e682019 FB |
1031 | switch(EAX) { |
1032 | case 0: | |
1033 | EAX = 2; /* max EAX index supported */ | |
2c0262af FB |
1034 | EBX = 0x756e6547; |
1035 | ECX = 0x6c65746e; | |
1036 | EDX = 0x49656e69; | |
8e682019 FB |
1037 | break; |
1038 | case 1: | |
1039 | { | |
1040 | int family, model, stepping; | |
1041 | /* EAX = 1 info */ | |
2c0262af | 1042 | #if 0 |
8e682019 FB |
1043 | /* pentium 75-200 */ |
1044 | family = 5; | |
1045 | model = 2; | |
1046 | stepping = 11; | |
2c0262af | 1047 | #else |
8e682019 FB |
1048 | /* pentium pro */ |
1049 | family = 6; | |
1050 | model = 1; | |
1051 | stepping = 3; | |
2c0262af | 1052 | #endif |
8e682019 FB |
1053 | EAX = (family << 8) | (model << 4) | stepping; |
1054 | EBX = 0; | |
1055 | ECX = 0; | |
1056 | EDX = CPUID_FP87 | CPUID_DE | CPUID_PSE | | |
1057 | CPUID_TSC | CPUID_MSR | CPUID_MCE | | |
1058 | CPUID_CX8 | CPUID_PGE | CPUID_CMOV; | |
1059 | } | |
1060 | break; | |
1061 | default: | |
1062 | /* cache info: needed for Pentium Pro compatibility */ | |
1063 | EAX = 0x410601; | |
2c0262af FB |
1064 | EBX = 0; |
1065 | ECX = 0; | |
8e682019 FB |
1066 | EDX = 0; |
1067 | break; | |
2c0262af FB |
1068 | } |
1069 | } | |
1070 | ||
61a8c4ec FB |
1071 | void helper_enter_level(int level, int data32) |
1072 | { | |
1073 | uint8_t *ssp; | |
1074 | uint32_t esp_mask, esp, ebp; | |
1075 | ||
1076 | esp_mask = get_sp_mask(env->segs[R_SS].flags); | |
1077 | ssp = env->segs[R_SS].base; | |
1078 | ebp = EBP; | |
1079 | esp = ESP; | |
1080 | if (data32) { | |
1081 | /* 32 bit */ | |
1082 | esp -= 4; | |
1083 | while (--level) { | |
1084 | esp -= 4; | |
1085 | ebp -= 4; | |
1086 | stl(ssp + (esp & esp_mask), ldl(ssp + (ebp & esp_mask))); | |
1087 | } | |
1088 | esp -= 4; | |
1089 | stl(ssp + (esp & esp_mask), T1); | |
1090 | } else { | |
1091 | /* 16 bit */ | |
1092 | esp -= 2; | |
1093 | while (--level) { | |
1094 | esp -= 2; | |
1095 | ebp -= 2; | |
1096 | stw(ssp + (esp & esp_mask), lduw(ssp + (ebp & esp_mask))); | |
1097 | } | |
1098 | esp -= 2; | |
1099 | stw(ssp + (esp & esp_mask), T1); | |
1100 | } | |
1101 | } | |
1102 | ||
2c0262af FB |
1103 | void helper_lldt_T0(void) |
1104 | { | |
1105 | int selector; | |
1106 | SegmentCache *dt; | |
1107 | uint32_t e1, e2; | |
1108 | int index; | |
1109 | uint8_t *ptr; | |
1110 | ||
1111 | selector = T0 & 0xffff; | |
1112 | if ((selector & 0xfffc) == 0) { | |
1113 | /* XXX: NULL selector case: invalid LDT */ | |
1114 | env->ldt.base = NULL; | |
1115 | env->ldt.limit = 0; | |
1116 | } else { | |
1117 | if (selector & 0x4) | |
1118 | raise_exception_err(EXCP0D_GPF, selector & 0xfffc); | |
1119 | dt = &env->gdt; | |
1120 | index = selector & ~7; | |
1121 | if ((index + 7) > dt->limit) | |
1122 | raise_exception_err(EXCP0D_GPF, selector & 0xfffc); | |
1123 | ptr = dt->base + index; | |
61382a50 FB |
1124 | e1 = ldl_kernel(ptr); |
1125 | e2 = ldl_kernel(ptr + 4); | |
2c0262af FB |
1126 | if ((e2 & DESC_S_MASK) || ((e2 >> DESC_TYPE_SHIFT) & 0xf) != 2) |
1127 | raise_exception_err(EXCP0D_GPF, selector & 0xfffc); | |
1128 | if (!(e2 & DESC_P_MASK)) | |
1129 | raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc); | |
1130 | load_seg_cache_raw_dt(&env->ldt, e1, e2); | |
1131 | } | |
1132 | env->ldt.selector = selector; | |
1133 | } | |
1134 | ||
1135 | void helper_ltr_T0(void) | |
1136 | { | |
1137 | int selector; | |
1138 | SegmentCache *dt; | |
1139 | uint32_t e1, e2; | |
1140 | int index, type; | |
1141 | uint8_t *ptr; | |
1142 | ||
1143 | selector = T0 & 0xffff; | |
1144 | if ((selector & 0xfffc) == 0) { | |
1145 | /* NULL selector case: invalid LDT */ | |
1146 | env->tr.base = NULL; | |
1147 | env->tr.limit = 0; | |
1148 | env->tr.flags = 0; | |
1149 | } else { | |
1150 | if (selector & 0x4) | |
1151 | raise_exception_err(EXCP0D_GPF, selector & 0xfffc); | |
1152 | dt = &env->gdt; | |
1153 | index = selector & ~7; | |
1154 | if ((index + 7) > dt->limit) | |
1155 | raise_exception_err(EXCP0D_GPF, selector & 0xfffc); | |
1156 | ptr = dt->base + index; | |
61382a50 FB |
1157 | e1 = ldl_kernel(ptr); |
1158 | e2 = ldl_kernel(ptr + 4); | |
2c0262af FB |
1159 | type = (e2 >> DESC_TYPE_SHIFT) & 0xf; |
1160 | if ((e2 & DESC_S_MASK) || | |
7e84c249 | 1161 | (type != 1 && type != 9)) |
2c0262af FB |
1162 | raise_exception_err(EXCP0D_GPF, selector & 0xfffc); |
1163 | if (!(e2 & DESC_P_MASK)) | |
1164 | raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc); | |
1165 | load_seg_cache_raw_dt(&env->tr, e1, e2); | |
8e682019 | 1166 | e2 |= DESC_TSS_BUSY_MASK; |
61382a50 | 1167 | stl_kernel(ptr + 4, e2); |
2c0262af FB |
1168 | } |
1169 | env->tr.selector = selector; | |
1170 | } | |
1171 | ||
3ab493de | 1172 | /* only works if protected mode and not VM86. seg_reg must be != R_CS */ |
8e682019 | 1173 | void load_seg(int seg_reg, int selector) |
2c0262af FB |
1174 | { |
1175 | uint32_t e1, e2; | |
3ab493de FB |
1176 | int cpl, dpl, rpl; |
1177 | SegmentCache *dt; | |
1178 | int index; | |
1179 | uint8_t *ptr; | |
1180 | ||
8e682019 | 1181 | selector &= 0xffff; |
2c0262af FB |
1182 | if ((selector & 0xfffc) == 0) { |
1183 | /* null selector case */ | |
8e682019 | 1184 | if (seg_reg == R_SS) |
2c0262af | 1185 | raise_exception_err(EXCP0D_GPF, 0); |
8e682019 | 1186 | cpu_x86_load_seg_cache(env, seg_reg, selector, NULL, 0, 0); |
2c0262af | 1187 | } else { |
3ab493de FB |
1188 | |
1189 | if (selector & 0x4) | |
1190 | dt = &env->ldt; | |
1191 | else | |
1192 | dt = &env->gdt; | |
1193 | index = selector & ~7; | |
8e682019 | 1194 | if ((index + 7) > dt->limit) |
2c0262af | 1195 | raise_exception_err(EXCP0D_GPF, selector & 0xfffc); |
3ab493de FB |
1196 | ptr = dt->base + index; |
1197 | e1 = ldl_kernel(ptr); | |
1198 | e2 = ldl_kernel(ptr + 4); | |
1199 | ||
8e682019 | 1200 | if (!(e2 & DESC_S_MASK)) |
2c0262af | 1201 | raise_exception_err(EXCP0D_GPF, selector & 0xfffc); |
3ab493de FB |
1202 | rpl = selector & 3; |
1203 | dpl = (e2 >> DESC_DPL_SHIFT) & 3; | |
1204 | cpl = env->hflags & HF_CPL_MASK; | |
2c0262af | 1205 | if (seg_reg == R_SS) { |
3ab493de | 1206 | /* must be writable segment */ |
8e682019 | 1207 | if ((e2 & DESC_CS_MASK) || !(e2 & DESC_W_MASK)) |
2c0262af | 1208 | raise_exception_err(EXCP0D_GPF, selector & 0xfffc); |
8e682019 | 1209 | if (rpl != cpl || dpl != cpl) |
3ab493de | 1210 | raise_exception_err(EXCP0D_GPF, selector & 0xfffc); |
2c0262af | 1211 | } else { |
3ab493de | 1212 | /* must be readable segment */ |
8e682019 | 1213 | if ((e2 & (DESC_CS_MASK | DESC_R_MASK)) == DESC_CS_MASK) |
2c0262af | 1214 | raise_exception_err(EXCP0D_GPF, selector & 0xfffc); |
3ab493de FB |
1215 | |
1216 | if (!(e2 & DESC_CS_MASK) || !(e2 & DESC_C_MASK)) { | |
1217 | /* if not conforming code, test rights */ | |
8e682019 | 1218 | if (dpl < cpl || dpl < rpl) |
3ab493de | 1219 | raise_exception_err(EXCP0D_GPF, selector & 0xfffc); |
3ab493de | 1220 | } |
2c0262af FB |
1221 | } |
1222 | ||
1223 | if (!(e2 & DESC_P_MASK)) { | |
2c0262af FB |
1224 | if (seg_reg == R_SS) |
1225 | raise_exception_err(EXCP0C_STACK, selector & 0xfffc); | |
1226 | else | |
1227 | raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc); | |
1228 | } | |
3ab493de FB |
1229 | |
1230 | /* set the access bit if not already set */ | |
1231 | if (!(e2 & DESC_A_MASK)) { | |
1232 | e2 |= DESC_A_MASK; | |
1233 | stl_kernel(ptr + 4, e2); | |
1234 | } | |
1235 | ||
2c0262af FB |
1236 | cpu_x86_load_seg_cache(env, seg_reg, selector, |
1237 | get_seg_base(e1, e2), | |
1238 | get_seg_limit(e1, e2), | |
1239 | e2); | |
1240 | #if 0 | |
1241 | fprintf(logfile, "load_seg: sel=0x%04x base=0x%08lx limit=0x%08lx flags=%08x\n", | |
1242 | selector, (unsigned long)sc->base, sc->limit, sc->flags); | |
1243 | #endif | |
1244 | } | |
1245 | } | |
1246 | ||
1247 | /* protected mode jump */ | |
08cea4ee | 1248 | void helper_ljmp_protected_T0_T1(int next_eip) |
2c0262af | 1249 | { |
7e84c249 | 1250 | int new_cs, new_eip, gate_cs, type; |
2c0262af FB |
1251 | uint32_t e1, e2, cpl, dpl, rpl, limit; |
1252 | ||
1253 | new_cs = T0; | |
1254 | new_eip = T1; | |
1255 | if ((new_cs & 0xfffc) == 0) | |
1256 | raise_exception_err(EXCP0D_GPF, 0); | |
1257 | if (load_segment(&e1, &e2, new_cs) != 0) | |
1258 | raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc); | |
1259 | cpl = env->hflags & HF_CPL_MASK; | |
1260 | if (e2 & DESC_S_MASK) { | |
1261 | if (!(e2 & DESC_CS_MASK)) | |
1262 | raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc); | |
1263 | dpl = (e2 >> DESC_DPL_SHIFT) & 3; | |
7e84c249 | 1264 | if (e2 & DESC_C_MASK) { |
2c0262af FB |
1265 | /* conforming code segment */ |
1266 | if (dpl > cpl) | |
1267 | raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc); | |
1268 | } else { | |
1269 | /* non conforming code segment */ | |
1270 | rpl = new_cs & 3; | |
1271 | if (rpl > cpl) | |
1272 | raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc); | |
1273 | if (dpl != cpl) | |
1274 | raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc); | |
1275 | } | |
1276 | if (!(e2 & DESC_P_MASK)) | |
1277 | raise_exception_err(EXCP0B_NOSEG, new_cs & 0xfffc); | |
1278 | limit = get_seg_limit(e1, e2); | |
1279 | if (new_eip > limit) | |
1280 | raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc); | |
1281 | cpu_x86_load_seg_cache(env, R_CS, (new_cs & 0xfffc) | cpl, | |
1282 | get_seg_base(e1, e2), limit, e2); | |
1283 | EIP = new_eip; | |
1284 | } else { | |
7e84c249 FB |
1285 | /* jump to call or task gate */ |
1286 | dpl = (e2 >> DESC_DPL_SHIFT) & 3; | |
1287 | rpl = new_cs & 3; | |
1288 | cpl = env->hflags & HF_CPL_MASK; | |
1289 | type = (e2 >> DESC_TYPE_SHIFT) & 0xf; | |
1290 | switch(type) { | |
1291 | case 1: /* 286 TSS */ | |
1292 | case 9: /* 386 TSS */ | |
1293 | case 5: /* task gate */ | |
1294 | if (dpl < cpl || dpl < rpl) | |
1295 | raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc); | |
08cea4ee | 1296 | switch_tss(new_cs, e1, e2, SWITCH_TSS_JMP, next_eip); |
7e84c249 FB |
1297 | break; |
1298 | case 4: /* 286 call gate */ | |
1299 | case 12: /* 386 call gate */ | |
1300 | if ((dpl < cpl) || (dpl < rpl)) | |
1301 | raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc); | |
1302 | if (!(e2 & DESC_P_MASK)) | |
1303 | raise_exception_err(EXCP0B_NOSEG, new_cs & 0xfffc); | |
1304 | gate_cs = e1 >> 16; | |
516633dc FB |
1305 | new_eip = (e1 & 0xffff); |
1306 | if (type == 12) | |
1307 | new_eip |= (e2 & 0xffff0000); | |
7e84c249 FB |
1308 | if (load_segment(&e1, &e2, gate_cs) != 0) |
1309 | raise_exception_err(EXCP0D_GPF, gate_cs & 0xfffc); | |
1310 | dpl = (e2 >> DESC_DPL_SHIFT) & 3; | |
1311 | /* must be code segment */ | |
1312 | if (((e2 & (DESC_S_MASK | DESC_CS_MASK)) != | |
1313 | (DESC_S_MASK | DESC_CS_MASK))) | |
1314 | raise_exception_err(EXCP0D_GPF, gate_cs & 0xfffc); | |
1315 | if (((e2 & DESC_C_MASK) && (dpl > cpl)) || | |
1316 | (!(e2 & DESC_C_MASK) && (dpl != cpl))) | |
1317 | raise_exception_err(EXCP0D_GPF, gate_cs & 0xfffc); | |
1318 | if (!(e2 & DESC_P_MASK)) | |
1319 | raise_exception_err(EXCP0D_GPF, gate_cs & 0xfffc); | |
7e84c249 FB |
1320 | limit = get_seg_limit(e1, e2); |
1321 | if (new_eip > limit) | |
1322 | raise_exception_err(EXCP0D_GPF, 0); | |
1323 | cpu_x86_load_seg_cache(env, R_CS, (gate_cs & 0xfffc) | cpl, | |
1324 | get_seg_base(e1, e2), limit, e2); | |
1325 | EIP = new_eip; | |
1326 | break; | |
1327 | default: | |
1328 | raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc); | |
1329 | break; | |
1330 | } | |
2c0262af FB |
1331 | } |
1332 | } | |
1333 | ||
1334 | /* real mode call */ | |
1335 | void helper_lcall_real_T0_T1(int shift, int next_eip) | |
1336 | { | |
1337 | int new_cs, new_eip; | |
1338 | uint32_t esp, esp_mask; | |
1339 | uint8_t *ssp; | |
1340 | ||
1341 | new_cs = T0; | |
1342 | new_eip = T1; | |
1343 | esp = ESP; | |
891b38e4 | 1344 | esp_mask = get_sp_mask(env->segs[R_SS].flags); |
2c0262af FB |
1345 | ssp = env->segs[R_SS].base; |
1346 | if (shift) { | |
891b38e4 FB |
1347 | PUSHL(ssp, esp, esp_mask, env->segs[R_CS].selector); |
1348 | PUSHL(ssp, esp, esp_mask, next_eip); | |
2c0262af | 1349 | } else { |
891b38e4 FB |
1350 | PUSHW(ssp, esp, esp_mask, env->segs[R_CS].selector); |
1351 | PUSHW(ssp, esp, esp_mask, next_eip); | |
2c0262af FB |
1352 | } |
1353 | ||
891b38e4 | 1354 | ESP = (ESP & ~esp_mask) | (esp & esp_mask); |
2c0262af FB |
1355 | env->eip = new_eip; |
1356 | env->segs[R_CS].selector = new_cs; | |
1357 | env->segs[R_CS].base = (uint8_t *)(new_cs << 4); | |
1358 | } | |
1359 | ||
1360 | /* protected mode call */ | |
1361 | void helper_lcall_protected_T0_T1(int shift, int next_eip) | |
1362 | { | |
891b38e4 | 1363 | int new_cs, new_eip, new_stack, i; |
2c0262af | 1364 | uint32_t e1, e2, cpl, dpl, rpl, selector, offset, param_count; |
891b38e4 FB |
1365 | uint32_t ss, ss_e1, ss_e2, sp, type, ss_dpl, sp_mask; |
1366 | uint32_t val, limit, old_sp_mask; | |
2c0262af FB |
1367 | uint8_t *ssp, *old_ssp; |
1368 | ||
1369 | new_cs = T0; | |
1370 | new_eip = T1; | |
f3f2d9be | 1371 | #ifdef DEBUG_PCALL |
e19e89a5 FB |
1372 | if (loglevel & CPU_LOG_PCALL) { |
1373 | fprintf(logfile, "lcall %04x:%08x s=%d\n", | |
1374 | new_cs, new_eip, shift); | |
7fe48483 | 1375 | cpu_dump_state(env, logfile, fprintf, X86_DUMP_CCOP); |
f3f2d9be FB |
1376 | } |
1377 | #endif | |
2c0262af FB |
1378 | if ((new_cs & 0xfffc) == 0) |
1379 | raise_exception_err(EXCP0D_GPF, 0); | |
1380 | if (load_segment(&e1, &e2, new_cs) != 0) | |
1381 | raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc); | |
1382 | cpl = env->hflags & HF_CPL_MASK; | |
f3f2d9be | 1383 | #ifdef DEBUG_PCALL |
e19e89a5 | 1384 | if (loglevel & CPU_LOG_PCALL) { |
f3f2d9be FB |
1385 | fprintf(logfile, "desc=%08x:%08x\n", e1, e2); |
1386 | } | |
1387 | #endif | |
2c0262af FB |
1388 | if (e2 & DESC_S_MASK) { |
1389 | if (!(e2 & DESC_CS_MASK)) | |
1390 | raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc); | |
1391 | dpl = (e2 >> DESC_DPL_SHIFT) & 3; | |
7e84c249 | 1392 | if (e2 & DESC_C_MASK) { |
2c0262af FB |
1393 | /* conforming code segment */ |
1394 | if (dpl > cpl) | |
1395 | raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc); | |
1396 | } else { | |
1397 | /* non conforming code segment */ | |
1398 | rpl = new_cs & 3; | |
1399 | if (rpl > cpl) | |
1400 | raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc); | |
1401 | if (dpl != cpl) | |
1402 | raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc); | |
1403 | } | |
1404 | if (!(e2 & DESC_P_MASK)) | |
1405 | raise_exception_err(EXCP0B_NOSEG, new_cs & 0xfffc); | |
1406 | ||
1407 | sp = ESP; | |
891b38e4 FB |
1408 | sp_mask = get_sp_mask(env->segs[R_SS].flags); |
1409 | ssp = env->segs[R_SS].base; | |
2c0262af | 1410 | if (shift) { |
891b38e4 FB |
1411 | PUSHL(ssp, sp, sp_mask, env->segs[R_CS].selector); |
1412 | PUSHL(ssp, sp, sp_mask, next_eip); | |
2c0262af | 1413 | } else { |
891b38e4 FB |
1414 | PUSHW(ssp, sp, sp_mask, env->segs[R_CS].selector); |
1415 | PUSHW(ssp, sp, sp_mask, next_eip); | |
2c0262af | 1416 | } |
2c0262af FB |
1417 | |
1418 | limit = get_seg_limit(e1, e2); | |
1419 | if (new_eip > limit) | |
1420 | raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc); | |
1421 | /* from this point, not restartable */ | |
891b38e4 | 1422 | ESP = (ESP & ~sp_mask) | (sp & sp_mask); |
2c0262af FB |
1423 | cpu_x86_load_seg_cache(env, R_CS, (new_cs & 0xfffc) | cpl, |
1424 | get_seg_base(e1, e2), limit, e2); | |
1425 | EIP = new_eip; | |
1426 | } else { | |
1427 | /* check gate type */ | |
1428 | type = (e2 >> DESC_TYPE_SHIFT) & 0x1f; | |
7e84c249 FB |
1429 | dpl = (e2 >> DESC_DPL_SHIFT) & 3; |
1430 | rpl = new_cs & 3; | |
2c0262af FB |
1431 | switch(type) { |
1432 | case 1: /* available 286 TSS */ | |
1433 | case 9: /* available 386 TSS */ | |
1434 | case 5: /* task gate */ | |
7e84c249 FB |
1435 | if (dpl < cpl || dpl < rpl) |
1436 | raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc); | |
883da8e2 | 1437 | switch_tss(new_cs, e1, e2, SWITCH_TSS_CALL, next_eip); |
8145122b | 1438 | return; |
2c0262af FB |
1439 | case 4: /* 286 call gate */ |
1440 | case 12: /* 386 call gate */ | |
1441 | break; | |
1442 | default: | |
1443 | raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc); | |
1444 | break; | |
1445 | } | |
1446 | shift = type >> 3; | |
1447 | ||
2c0262af FB |
1448 | if (dpl < cpl || dpl < rpl) |
1449 | raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc); | |
1450 | /* check valid bit */ | |
1451 | if (!(e2 & DESC_P_MASK)) | |
1452 | raise_exception_err(EXCP0B_NOSEG, new_cs & 0xfffc); | |
1453 | selector = e1 >> 16; | |
1454 | offset = (e2 & 0xffff0000) | (e1 & 0x0000ffff); | |
f3f2d9be | 1455 | param_count = e2 & 0x1f; |
2c0262af FB |
1456 | if ((selector & 0xfffc) == 0) |
1457 | raise_exception_err(EXCP0D_GPF, 0); | |
1458 | ||
1459 | if (load_segment(&e1, &e2, selector) != 0) | |
1460 | raise_exception_err(EXCP0D_GPF, selector & 0xfffc); | |
1461 | if (!(e2 & DESC_S_MASK) || !(e2 & (DESC_CS_MASK))) | |
1462 | raise_exception_err(EXCP0D_GPF, selector & 0xfffc); | |
1463 | dpl = (e2 >> DESC_DPL_SHIFT) & 3; | |
1464 | if (dpl > cpl) | |
1465 | raise_exception_err(EXCP0D_GPF, selector & 0xfffc); | |
1466 | if (!(e2 & DESC_P_MASK)) | |
1467 | raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc); | |
1468 | ||
1469 | if (!(e2 & DESC_C_MASK) && dpl < cpl) { | |
1470 | /* to inner priviledge */ | |
1471 | get_ss_esp_from_tss(&ss, &sp, dpl); | |
f3f2d9be | 1472 | #ifdef DEBUG_PCALL |
e19e89a5 FB |
1473 | if (loglevel & CPU_LOG_PCALL) |
1474 | fprintf(logfile, "new ss:esp=%04x:%08x param_count=%d ESP=%x\n", | |
f3f2d9be FB |
1475 | ss, sp, param_count, ESP); |
1476 | #endif | |
2c0262af FB |
1477 | if ((ss & 0xfffc) == 0) |
1478 | raise_exception_err(EXCP0A_TSS, ss & 0xfffc); | |
1479 | if ((ss & 3) != dpl) | |
1480 | raise_exception_err(EXCP0A_TSS, ss & 0xfffc); | |
1481 | if (load_segment(&ss_e1, &ss_e2, ss) != 0) | |
1482 | raise_exception_err(EXCP0A_TSS, ss & 0xfffc); | |
1483 | ss_dpl = (ss_e2 >> DESC_DPL_SHIFT) & 3; | |
1484 | if (ss_dpl != dpl) | |
1485 | raise_exception_err(EXCP0A_TSS, ss & 0xfffc); | |
1486 | if (!(ss_e2 & DESC_S_MASK) || | |
1487 | (ss_e2 & DESC_CS_MASK) || | |
1488 | !(ss_e2 & DESC_W_MASK)) | |
1489 | raise_exception_err(EXCP0A_TSS, ss & 0xfffc); | |
1490 | if (!(ss_e2 & DESC_P_MASK)) | |
1491 | raise_exception_err(EXCP0A_TSS, ss & 0xfffc); | |
1492 | ||
891b38e4 | 1493 | // push_size = ((param_count * 2) + 8) << shift; |
2c0262af | 1494 | |
891b38e4 FB |
1495 | old_sp_mask = get_sp_mask(env->segs[R_SS].flags); |
1496 | old_ssp = env->segs[R_SS].base; | |
2c0262af | 1497 | |
891b38e4 FB |
1498 | sp_mask = get_sp_mask(ss_e2); |
1499 | ssp = get_seg_base(ss_e1, ss_e2); | |
2c0262af | 1500 | if (shift) { |
891b38e4 FB |
1501 | PUSHL(ssp, sp, sp_mask, env->segs[R_SS].selector); |
1502 | PUSHL(ssp, sp, sp_mask, ESP); | |
1503 | for(i = param_count - 1; i >= 0; i--) { | |
1504 | val = ldl_kernel(old_ssp + ((ESP + i * 4) & old_sp_mask)); | |
1505 | PUSHL(ssp, sp, sp_mask, val); | |
2c0262af FB |
1506 | } |
1507 | } else { | |
891b38e4 FB |
1508 | PUSHW(ssp, sp, sp_mask, env->segs[R_SS].selector); |
1509 | PUSHW(ssp, sp, sp_mask, ESP); | |
1510 | for(i = param_count - 1; i >= 0; i--) { | |
1511 | val = lduw_kernel(old_ssp + ((ESP + i * 2) & old_sp_mask)); | |
1512 | PUSHW(ssp, sp, sp_mask, val); | |
2c0262af FB |
1513 | } |
1514 | } | |
891b38e4 | 1515 | new_stack = 1; |
2c0262af FB |
1516 | } else { |
1517 | /* to same priviledge */ | |
891b38e4 FB |
1518 | sp = ESP; |
1519 | sp_mask = get_sp_mask(env->segs[R_SS].flags); | |
1520 | ssp = env->segs[R_SS].base; | |
1521 | // push_size = (4 << shift); | |
1522 | new_stack = 0; | |
2c0262af FB |
1523 | } |
1524 | ||
1525 | if (shift) { | |
891b38e4 FB |
1526 | PUSHL(ssp, sp, sp_mask, env->segs[R_CS].selector); |
1527 | PUSHL(ssp, sp, sp_mask, next_eip); | |
2c0262af | 1528 | } else { |
891b38e4 FB |
1529 | PUSHW(ssp, sp, sp_mask, env->segs[R_CS].selector); |
1530 | PUSHW(ssp, sp, sp_mask, next_eip); | |
1531 | } | |
1532 | ||
1533 | /* from this point, not restartable */ | |
1534 | ||
1535 | if (new_stack) { | |
1536 | ss = (ss & ~3) | dpl; | |
1537 | cpu_x86_load_seg_cache(env, R_SS, ss, | |
1538 | ssp, | |
1539 | get_seg_limit(ss_e1, ss_e2), | |
1540 | ss_e2); | |
2c0262af FB |
1541 | } |
1542 | ||
2c0262af FB |
1543 | selector = (selector & ~3) | dpl; |
1544 | cpu_x86_load_seg_cache(env, R_CS, selector, | |
1545 | get_seg_base(e1, e2), | |
1546 | get_seg_limit(e1, e2), | |
1547 | e2); | |
1548 | cpu_x86_set_cpl(env, dpl); | |
891b38e4 | 1549 | ESP = (ESP & ~sp_mask) | (sp & sp_mask); |
2c0262af FB |
1550 | EIP = offset; |
1551 | } | |
1552 | } | |
1553 | ||
7e84c249 | 1554 | /* real and vm86 mode iret */ |
2c0262af FB |
1555 | void helper_iret_real(int shift) |
1556 | { | |
891b38e4 | 1557 | uint32_t sp, new_cs, new_eip, new_eflags, sp_mask; |
2c0262af FB |
1558 | uint8_t *ssp; |
1559 | int eflags_mask; | |
7e84c249 | 1560 | |
891b38e4 FB |
1561 | sp_mask = 0xffff; /* XXXX: use SS segment size ? */ |
1562 | sp = ESP; | |
1563 | ssp = env->segs[R_SS].base; | |
2c0262af FB |
1564 | if (shift == 1) { |
1565 | /* 32 bits */ | |
891b38e4 FB |
1566 | POPL(ssp, sp, sp_mask, new_eip); |
1567 | POPL(ssp, sp, sp_mask, new_cs); | |
1568 | new_cs &= 0xffff; | |
1569 | POPL(ssp, sp, sp_mask, new_eflags); | |
2c0262af FB |
1570 | } else { |
1571 | /* 16 bits */ | |
891b38e4 FB |
1572 | POPW(ssp, sp, sp_mask, new_eip); |
1573 | POPW(ssp, sp, sp_mask, new_cs); | |
1574 | POPW(ssp, sp, sp_mask, new_eflags); | |
2c0262af | 1575 | } |
4136f33c | 1576 | ESP = (ESP & ~sp_mask) | (sp & sp_mask); |
2c0262af FB |
1577 | load_seg_vm(R_CS, new_cs); |
1578 | env->eip = new_eip; | |
7e84c249 | 1579 | if (env->eflags & VM_MASK) |
8145122b | 1580 | eflags_mask = TF_MASK | AC_MASK | ID_MASK | IF_MASK | RF_MASK | NT_MASK; |
7e84c249 | 1581 | else |
8145122b | 1582 | eflags_mask = TF_MASK | AC_MASK | ID_MASK | IF_MASK | IOPL_MASK | RF_MASK | NT_MASK; |
2c0262af FB |
1583 | if (shift == 0) |
1584 | eflags_mask &= 0xffff; | |
1585 | load_eflags(new_eflags, eflags_mask); | |
1586 | } | |
1587 | ||
8e682019 FB |
1588 | static inline void validate_seg(int seg_reg, int cpl) |
1589 | { | |
1590 | int dpl; | |
1591 | uint32_t e2; | |
1592 | ||
1593 | e2 = env->segs[seg_reg].flags; | |
1594 | dpl = (e2 >> DESC_DPL_SHIFT) & 3; | |
1595 | if (!(e2 & DESC_CS_MASK) || !(e2 & DESC_C_MASK)) { | |
1596 | /* data or non conforming code segment */ | |
1597 | if (dpl < cpl) { | |
1598 | cpu_x86_load_seg_cache(env, seg_reg, 0, NULL, 0, 0); | |
1599 | } | |
1600 | } | |
1601 | } | |
1602 | ||
2c0262af FB |
1603 | /* protected mode iret */ |
1604 | static inline void helper_ret_protected(int shift, int is_iret, int addend) | |
1605 | { | |
891b38e4 | 1606 | uint32_t sp, new_cs, new_eip, new_eflags, new_esp, new_ss, sp_mask; |
2c0262af FB |
1607 | uint32_t new_es, new_ds, new_fs, new_gs; |
1608 | uint32_t e1, e2, ss_e1, ss_e2; | |
4136f33c | 1609 | int cpl, dpl, rpl, eflags_mask, iopl; |
2c0262af FB |
1610 | uint8_t *ssp; |
1611 | ||
891b38e4 | 1612 | sp_mask = get_sp_mask(env->segs[R_SS].flags); |
2c0262af | 1613 | sp = ESP; |
891b38e4 | 1614 | ssp = env->segs[R_SS].base; |
354ff226 | 1615 | new_eflags = 0; /* avoid warning */ |
2c0262af FB |
1616 | if (shift == 1) { |
1617 | /* 32 bits */ | |
891b38e4 FB |
1618 | POPL(ssp, sp, sp_mask, new_eip); |
1619 | POPL(ssp, sp, sp_mask, new_cs); | |
1620 | new_cs &= 0xffff; | |
1621 | if (is_iret) { | |
1622 | POPL(ssp, sp, sp_mask, new_eflags); | |
1623 | if (new_eflags & VM_MASK) | |
1624 | goto return_to_vm86; | |
1625 | } | |
2c0262af FB |
1626 | } else { |
1627 | /* 16 bits */ | |
891b38e4 FB |
1628 | POPW(ssp, sp, sp_mask, new_eip); |
1629 | POPW(ssp, sp, sp_mask, new_cs); | |
2c0262af | 1630 | if (is_iret) |
891b38e4 | 1631 | POPW(ssp, sp, sp_mask, new_eflags); |
2c0262af | 1632 | } |
891b38e4 | 1633 | #ifdef DEBUG_PCALL |
e19e89a5 FB |
1634 | if (loglevel & CPU_LOG_PCALL) { |
1635 | fprintf(logfile, "lret new %04x:%08x s=%d addend=0x%x\n", | |
1636 | new_cs, new_eip, shift, addend); | |
7fe48483 | 1637 | cpu_dump_state(env, logfile, fprintf, X86_DUMP_CCOP); |
891b38e4 FB |
1638 | } |
1639 | #endif | |
2c0262af FB |
1640 | if ((new_cs & 0xfffc) == 0) |
1641 | raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc); | |
1642 | if (load_segment(&e1, &e2, new_cs) != 0) | |
1643 | raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc); | |
1644 | if (!(e2 & DESC_S_MASK) || | |
1645 | !(e2 & DESC_CS_MASK)) | |
1646 | raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc); | |
1647 | cpl = env->hflags & HF_CPL_MASK; | |
1648 | rpl = new_cs & 3; | |
1649 | if (rpl < cpl) | |
1650 | raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc); | |
1651 | dpl = (e2 >> DESC_DPL_SHIFT) & 3; | |
7e84c249 | 1652 | if (e2 & DESC_C_MASK) { |
2c0262af FB |
1653 | if (dpl > rpl) |
1654 | raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc); | |
1655 | } else { | |
1656 | if (dpl != rpl) | |
1657 | raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc); | |
1658 | } | |
1659 | if (!(e2 & DESC_P_MASK)) | |
1660 | raise_exception_err(EXCP0B_NOSEG, new_cs & 0xfffc); | |
1661 | ||
891b38e4 | 1662 | sp += addend; |
2c0262af FB |
1663 | if (rpl == cpl) { |
1664 | /* return to same priledge level */ | |
1665 | cpu_x86_load_seg_cache(env, R_CS, new_cs, | |
1666 | get_seg_base(e1, e2), | |
1667 | get_seg_limit(e1, e2), | |
1668 | e2); | |
2c0262af FB |
1669 | } else { |
1670 | /* return to different priviledge level */ | |
2c0262af FB |
1671 | if (shift == 1) { |
1672 | /* 32 bits */ | |
891b38e4 FB |
1673 | POPL(ssp, sp, sp_mask, new_esp); |
1674 | POPL(ssp, sp, sp_mask, new_ss); | |
1675 | new_ss &= 0xffff; | |
2c0262af FB |
1676 | } else { |
1677 | /* 16 bits */ | |
891b38e4 FB |
1678 | POPW(ssp, sp, sp_mask, new_esp); |
1679 | POPW(ssp, sp, sp_mask, new_ss); | |
2c0262af | 1680 | } |
e19e89a5 FB |
1681 | #ifdef DEBUG_PCALL |
1682 | if (loglevel & CPU_LOG_PCALL) { | |
1683 | fprintf(logfile, "new ss:esp=%04x:%08x\n", | |
1684 | new_ss, new_esp); | |
1685 | } | |
1686 | #endif | |
2c0262af FB |
1687 | |
1688 | if ((new_ss & 3) != rpl) | |
1689 | raise_exception_err(EXCP0D_GPF, new_ss & 0xfffc); | |
1690 | if (load_segment(&ss_e1, &ss_e2, new_ss) != 0) | |
1691 | raise_exception_err(EXCP0D_GPF, new_ss & 0xfffc); | |
1692 | if (!(ss_e2 & DESC_S_MASK) || | |
1693 | (ss_e2 & DESC_CS_MASK) || | |
1694 | !(ss_e2 & DESC_W_MASK)) | |
1695 | raise_exception_err(EXCP0D_GPF, new_ss & 0xfffc); | |
1696 | dpl = (ss_e2 >> DESC_DPL_SHIFT) & 3; | |
1697 | if (dpl != rpl) | |
1698 | raise_exception_err(EXCP0D_GPF, new_ss & 0xfffc); | |
1699 | if (!(ss_e2 & DESC_P_MASK)) | |
1700 | raise_exception_err(EXCP0B_NOSEG, new_ss & 0xfffc); | |
1701 | ||
1702 | cpu_x86_load_seg_cache(env, R_CS, new_cs, | |
1703 | get_seg_base(e1, e2), | |
1704 | get_seg_limit(e1, e2), | |
1705 | e2); | |
1706 | cpu_x86_load_seg_cache(env, R_SS, new_ss, | |
1707 | get_seg_base(ss_e1, ss_e2), | |
1708 | get_seg_limit(ss_e1, ss_e2), | |
1709 | ss_e2); | |
1710 | cpu_x86_set_cpl(env, rpl); | |
891b38e4 | 1711 | sp = new_esp; |
11774f54 | 1712 | sp_mask = get_sp_mask(ss_e2); |
8e682019 FB |
1713 | |
1714 | /* validate data segments */ | |
1715 | validate_seg(R_ES, cpl); | |
1716 | validate_seg(R_DS, cpl); | |
1717 | validate_seg(R_FS, cpl); | |
1718 | validate_seg(R_GS, cpl); | |
4afa6482 FB |
1719 | |
1720 | sp += addend; | |
2c0262af | 1721 | } |
891b38e4 | 1722 | ESP = (ESP & ~sp_mask) | (sp & sp_mask); |
2c0262af FB |
1723 | env->eip = new_eip; |
1724 | if (is_iret) { | |
4136f33c | 1725 | /* NOTE: 'cpl' is the _old_ CPL */ |
8145122b | 1726 | eflags_mask = TF_MASK | AC_MASK | ID_MASK | RF_MASK | NT_MASK; |
2c0262af | 1727 | if (cpl == 0) |
4136f33c FB |
1728 | eflags_mask |= IOPL_MASK; |
1729 | iopl = (env->eflags >> IOPL_SHIFT) & 3; | |
1730 | if (cpl <= iopl) | |
1731 | eflags_mask |= IF_MASK; | |
2c0262af FB |
1732 | if (shift == 0) |
1733 | eflags_mask &= 0xffff; | |
1734 | load_eflags(new_eflags, eflags_mask); | |
1735 | } | |
1736 | return; | |
1737 | ||
1738 | return_to_vm86: | |
891b38e4 FB |
1739 | POPL(ssp, sp, sp_mask, new_esp); |
1740 | POPL(ssp, sp, sp_mask, new_ss); | |
1741 | POPL(ssp, sp, sp_mask, new_es); | |
1742 | POPL(ssp, sp, sp_mask, new_ds); | |
1743 | POPL(ssp, sp, sp_mask, new_fs); | |
1744 | POPL(ssp, sp, sp_mask, new_gs); | |
2c0262af FB |
1745 | |
1746 | /* modify processor state */ | |
4136f33c | 1747 | load_eflags(new_eflags, TF_MASK | AC_MASK | ID_MASK | |
8145122b | 1748 | IF_MASK | IOPL_MASK | VM_MASK | NT_MASK | VIF_MASK | VIP_MASK); |
891b38e4 | 1749 | load_seg_vm(R_CS, new_cs & 0xffff); |
2c0262af | 1750 | cpu_x86_set_cpl(env, 3); |
891b38e4 FB |
1751 | load_seg_vm(R_SS, new_ss & 0xffff); |
1752 | load_seg_vm(R_ES, new_es & 0xffff); | |
1753 | load_seg_vm(R_DS, new_ds & 0xffff); | |
1754 | load_seg_vm(R_FS, new_fs & 0xffff); | |
1755 | load_seg_vm(R_GS, new_gs & 0xffff); | |
2c0262af | 1756 | |
fd836909 | 1757 | env->eip = new_eip & 0xffff; |
2c0262af FB |
1758 | ESP = new_esp; |
1759 | } | |
1760 | ||
08cea4ee | 1761 | void helper_iret_protected(int shift, int next_eip) |
2c0262af | 1762 | { |
7e84c249 FB |
1763 | int tss_selector, type; |
1764 | uint32_t e1, e2; | |
1765 | ||
1766 | /* specific case for TSS */ | |
1767 | if (env->eflags & NT_MASK) { | |
1768 | tss_selector = lduw_kernel(env->tr.base + 0); | |
1769 | if (tss_selector & 4) | |
1770 | raise_exception_err(EXCP0A_TSS, tss_selector & 0xfffc); | |
1771 | if (load_segment(&e1, &e2, tss_selector) != 0) | |
1772 | raise_exception_err(EXCP0A_TSS, tss_selector & 0xfffc); | |
1773 | type = (e2 >> DESC_TYPE_SHIFT) & 0x17; | |
1774 | /* NOTE: we check both segment and busy TSS */ | |
1775 | if (type != 3) | |
1776 | raise_exception_err(EXCP0A_TSS, tss_selector & 0xfffc); | |
08cea4ee | 1777 | switch_tss(tss_selector, e1, e2, SWITCH_TSS_IRET, next_eip); |
7e84c249 FB |
1778 | } else { |
1779 | helper_ret_protected(shift, 1, 0); | |
1780 | } | |
2c0262af FB |
1781 | } |
1782 | ||
1783 | void helper_lret_protected(int shift, int addend) | |
1784 | { | |
1785 | helper_ret_protected(shift, 0, addend); | |
1786 | } | |
1787 | ||
023fe10d FB |
1788 | void helper_sysenter(void) |
1789 | { | |
1790 | if (env->sysenter_cs == 0) { | |
1791 | raise_exception_err(EXCP0D_GPF, 0); | |
1792 | } | |
1793 | env->eflags &= ~(VM_MASK | IF_MASK | RF_MASK); | |
1794 | cpu_x86_set_cpl(env, 0); | |
1795 | cpu_x86_load_seg_cache(env, R_CS, env->sysenter_cs & 0xfffc, | |
1796 | NULL, 0xffffffff, | |
1797 | DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | | |
1798 | DESC_S_MASK | | |
1799 | DESC_CS_MASK | DESC_R_MASK | DESC_A_MASK); | |
1800 | cpu_x86_load_seg_cache(env, R_SS, (env->sysenter_cs + 8) & 0xfffc, | |
1801 | NULL, 0xffffffff, | |
1802 | DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | | |
1803 | DESC_S_MASK | | |
1804 | DESC_W_MASK | DESC_A_MASK); | |
1805 | ESP = env->sysenter_esp; | |
1806 | EIP = env->sysenter_eip; | |
1807 | } | |
1808 | ||
1809 | void helper_sysexit(void) | |
1810 | { | |
1811 | int cpl; | |
1812 | ||
1813 | cpl = env->hflags & HF_CPL_MASK; | |
1814 | if (env->sysenter_cs == 0 || cpl != 0) { | |
1815 | raise_exception_err(EXCP0D_GPF, 0); | |
1816 | } | |
1817 | cpu_x86_set_cpl(env, 3); | |
1818 | cpu_x86_load_seg_cache(env, R_CS, ((env->sysenter_cs + 16) & 0xfffc) | 3, | |
1819 | NULL, 0xffffffff, | |
1820 | DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | | |
1821 | DESC_S_MASK | (3 << DESC_DPL_SHIFT) | | |
1822 | DESC_CS_MASK | DESC_R_MASK | DESC_A_MASK); | |
1823 | cpu_x86_load_seg_cache(env, R_SS, ((env->sysenter_cs + 24) & 0xfffc) | 3, | |
1824 | NULL, 0xffffffff, | |
1825 | DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | | |
1826 | DESC_S_MASK | (3 << DESC_DPL_SHIFT) | | |
1827 | DESC_W_MASK | DESC_A_MASK); | |
1828 | ESP = ECX; | |
1829 | EIP = EDX; | |
1830 | } | |
1831 | ||
2c0262af FB |
1832 | void helper_movl_crN_T0(int reg) |
1833 | { | |
2c0262af FB |
1834 | switch(reg) { |
1835 | case 0: | |
1ac157da | 1836 | cpu_x86_update_cr0(env, T0); |
2c0262af FB |
1837 | break; |
1838 | case 3: | |
1ac157da FB |
1839 | cpu_x86_update_cr3(env, T0); |
1840 | break; | |
1841 | case 4: | |
1842 | cpu_x86_update_cr4(env, T0); | |
1843 | break; | |
1844 | default: | |
1845 | env->cr[reg] = T0; | |
2c0262af FB |
1846 | break; |
1847 | } | |
1848 | } | |
1849 | ||
1850 | /* XXX: do more */ | |
1851 | void helper_movl_drN_T0(int reg) | |
1852 | { | |
1853 | env->dr[reg] = T0; | |
1854 | } | |
1855 | ||
1856 | void helper_invlpg(unsigned int addr) | |
1857 | { | |
1858 | cpu_x86_flush_tlb(env, addr); | |
1859 | } | |
1860 | ||
2c0262af FB |
1861 | void helper_rdtsc(void) |
1862 | { | |
1863 | uint64_t val; | |
28ab0e2e FB |
1864 | |
1865 | val = cpu_get_tsc(env); | |
2c0262af FB |
1866 | EAX = val; |
1867 | EDX = val >> 32; | |
1868 | } | |
1869 | ||
1870 | void helper_wrmsr(void) | |
1871 | { | |
1872 | switch(ECX) { | |
1873 | case MSR_IA32_SYSENTER_CS: | |
1874 | env->sysenter_cs = EAX & 0xffff; | |
1875 | break; | |
1876 | case MSR_IA32_SYSENTER_ESP: | |
1877 | env->sysenter_esp = EAX; | |
1878 | break; | |
1879 | case MSR_IA32_SYSENTER_EIP: | |
1880 | env->sysenter_eip = EAX; | |
1881 | break; | |
1882 | default: | |
1883 | /* XXX: exception ? */ | |
1884 | break; | |
1885 | } | |
1886 | } | |
1887 | ||
1888 | void helper_rdmsr(void) | |
1889 | { | |
1890 | switch(ECX) { | |
1891 | case MSR_IA32_SYSENTER_CS: | |
1892 | EAX = env->sysenter_cs; | |
1893 | EDX = 0; | |
1894 | break; | |
1895 | case MSR_IA32_SYSENTER_ESP: | |
1896 | EAX = env->sysenter_esp; | |
1897 | EDX = 0; | |
1898 | break; | |
1899 | case MSR_IA32_SYSENTER_EIP: | |
1900 | EAX = env->sysenter_eip; | |
1901 | EDX = 0; | |
1902 | break; | |
1903 | default: | |
1904 | /* XXX: exception ? */ | |
1905 | break; | |
1906 | } | |
1907 | } | |
1908 | ||
1909 | void helper_lsl(void) | |
1910 | { | |
1911 | unsigned int selector, limit; | |
1912 | uint32_t e1, e2; | |
3ab493de | 1913 | int rpl, dpl, cpl, type; |
2c0262af FB |
1914 | |
1915 | CC_SRC = cc_table[CC_OP].compute_all() & ~CC_Z; | |
1916 | selector = T0 & 0xffff; | |
1917 | if (load_segment(&e1, &e2, selector) != 0) | |
1918 | return; | |
3ab493de FB |
1919 | rpl = selector & 3; |
1920 | dpl = (e2 >> DESC_DPL_SHIFT) & 3; | |
1921 | cpl = env->hflags & HF_CPL_MASK; | |
1922 | if (e2 & DESC_S_MASK) { | |
1923 | if ((e2 & DESC_CS_MASK) && (e2 & DESC_C_MASK)) { | |
1924 | /* conforming */ | |
1925 | } else { | |
1926 | if (dpl < cpl || dpl < rpl) | |
1927 | return; | |
1928 | } | |
1929 | } else { | |
1930 | type = (e2 >> DESC_TYPE_SHIFT) & 0xf; | |
1931 | switch(type) { | |
1932 | case 1: | |
1933 | case 2: | |
1934 | case 3: | |
1935 | case 9: | |
1936 | case 11: | |
1937 | break; | |
1938 | default: | |
1939 | return; | |
1940 | } | |
1941 | if (dpl < cpl || dpl < rpl) | |
1942 | return; | |
1943 | } | |
1944 | limit = get_seg_limit(e1, e2); | |
2c0262af FB |
1945 | T1 = limit; |
1946 | CC_SRC |= CC_Z; | |
1947 | } | |
1948 | ||
1949 | void helper_lar(void) | |
1950 | { | |
1951 | unsigned int selector; | |
1952 | uint32_t e1, e2; | |
3ab493de | 1953 | int rpl, dpl, cpl, type; |
2c0262af FB |
1954 | |
1955 | CC_SRC = cc_table[CC_OP].compute_all() & ~CC_Z; | |
1956 | selector = T0 & 0xffff; | |
3ab493de FB |
1957 | if ((selector & 0xfffc) == 0) |
1958 | return; | |
2c0262af FB |
1959 | if (load_segment(&e1, &e2, selector) != 0) |
1960 | return; | |
3ab493de FB |
1961 | rpl = selector & 3; |
1962 | dpl = (e2 >> DESC_DPL_SHIFT) & 3; | |
1963 | cpl = env->hflags & HF_CPL_MASK; | |
1964 | if (e2 & DESC_S_MASK) { | |
1965 | if ((e2 & DESC_CS_MASK) && (e2 & DESC_C_MASK)) { | |
1966 | /* conforming */ | |
1967 | } else { | |
1968 | if (dpl < cpl || dpl < rpl) | |
1969 | return; | |
1970 | } | |
1971 | } else { | |
1972 | type = (e2 >> DESC_TYPE_SHIFT) & 0xf; | |
1973 | switch(type) { | |
1974 | case 1: | |
1975 | case 2: | |
1976 | case 3: | |
1977 | case 4: | |
1978 | case 5: | |
1979 | case 9: | |
1980 | case 11: | |
1981 | case 12: | |
1982 | break; | |
1983 | default: | |
1984 | return; | |
1985 | } | |
1986 | if (dpl < cpl || dpl < rpl) | |
1987 | return; | |
1988 | } | |
2c0262af FB |
1989 | T1 = e2 & 0x00f0ff00; |
1990 | CC_SRC |= CC_Z; | |
1991 | } | |
1992 | ||
3ab493de FB |
1993 | void helper_verr(void) |
1994 | { | |
1995 | unsigned int selector; | |
1996 | uint32_t e1, e2; | |
1997 | int rpl, dpl, cpl; | |
1998 | ||
1999 | CC_SRC = cc_table[CC_OP].compute_all() & ~CC_Z; | |
2000 | selector = T0 & 0xffff; | |
2001 | if ((selector & 0xfffc) == 0) | |
2002 | return; | |
2003 | if (load_segment(&e1, &e2, selector) != 0) | |
2004 | return; | |
2005 | if (!(e2 & DESC_S_MASK)) | |
2006 | return; | |
2007 | rpl = selector & 3; | |
2008 | dpl = (e2 >> DESC_DPL_SHIFT) & 3; | |
2009 | cpl = env->hflags & HF_CPL_MASK; | |
2010 | if (e2 & DESC_CS_MASK) { | |
2011 | if (!(e2 & DESC_R_MASK)) | |
2012 | return; | |
2013 | if (!(e2 & DESC_C_MASK)) { | |
2014 | if (dpl < cpl || dpl < rpl) | |
2015 | return; | |
2016 | } | |
2017 | } else { | |
2018 | if (dpl < cpl || dpl < rpl) | |
2019 | return; | |
2020 | } | |
f3f2d9be | 2021 | CC_SRC |= CC_Z; |
3ab493de FB |
2022 | } |
2023 | ||
2024 | void helper_verw(void) | |
2025 | { | |
2026 | unsigned int selector; | |
2027 | uint32_t e1, e2; | |
2028 | int rpl, dpl, cpl; | |
2029 | ||
2030 | CC_SRC = cc_table[CC_OP].compute_all() & ~CC_Z; | |
2031 | selector = T0 & 0xffff; | |
2032 | if ((selector & 0xfffc) == 0) | |
2033 | return; | |
2034 | if (load_segment(&e1, &e2, selector) != 0) | |
2035 | return; | |
2036 | if (!(e2 & DESC_S_MASK)) | |
2037 | return; | |
2038 | rpl = selector & 3; | |
2039 | dpl = (e2 >> DESC_DPL_SHIFT) & 3; | |
2040 | cpl = env->hflags & HF_CPL_MASK; | |
2041 | if (e2 & DESC_CS_MASK) { | |
2042 | return; | |
2043 | } else { | |
2044 | if (dpl < cpl || dpl < rpl) | |
2045 | return; | |
2046 | if (!(e2 & DESC_W_MASK)) | |
2047 | return; | |
2048 | } | |
f3f2d9be | 2049 | CC_SRC |= CC_Z; |
3ab493de FB |
2050 | } |
2051 | ||
2c0262af FB |
2052 | /* FPU helpers */ |
2053 | ||
2c0262af FB |
2054 | void helper_fldt_ST0_A0(void) |
2055 | { | |
2056 | int new_fpstt; | |
2057 | new_fpstt = (env->fpstt - 1) & 7; | |
2058 | env->fpregs[new_fpstt] = helper_fldt((uint8_t *)A0); | |
2059 | env->fpstt = new_fpstt; | |
2060 | env->fptags[new_fpstt] = 0; /* validate stack entry */ | |
2061 | } | |
2062 | ||
2063 | void helper_fstt_ST0_A0(void) | |
2064 | { | |
2065 | helper_fstt(ST0, (uint8_t *)A0); | |
2066 | } | |
2c0262af | 2067 | |
2ee73ac3 FB |
2068 | void fpu_set_exception(int mask) |
2069 | { | |
2070 | env->fpus |= mask; | |
2071 | if (env->fpus & (~env->fpuc & FPUC_EM)) | |
2072 | env->fpus |= FPUS_SE | FPUS_B; | |
2073 | } | |
2074 | ||
2075 | CPU86_LDouble helper_fdiv(CPU86_LDouble a, CPU86_LDouble b) | |
2076 | { | |
2077 | if (b == 0.0) | |
2078 | fpu_set_exception(FPUS_ZE); | |
2079 | return a / b; | |
2080 | } | |
2081 | ||
2082 | void fpu_raise_exception(void) | |
2083 | { | |
2084 | if (env->cr[0] & CR0_NE_MASK) { | |
2085 | raise_exception(EXCP10_COPR); | |
2086 | } | |
2087 | #if !defined(CONFIG_USER_ONLY) | |
2088 | else { | |
2089 | cpu_set_ferr(env); | |
2090 | } | |
2091 | #endif | |
2092 | } | |
2093 | ||
2c0262af FB |
2094 | /* BCD ops */ |
2095 | ||
2c0262af FB |
2096 | void helper_fbld_ST0_A0(void) |
2097 | { | |
2098 | CPU86_LDouble tmp; | |
2099 | uint64_t val; | |
2100 | unsigned int v; | |
2101 | int i; | |
2102 | ||
2103 | val = 0; | |
2104 | for(i = 8; i >= 0; i--) { | |
2105 | v = ldub((uint8_t *)A0 + i); | |
2106 | val = (val * 100) + ((v >> 4) * 10) + (v & 0xf); | |
2107 | } | |
2108 | tmp = val; | |
2109 | if (ldub((uint8_t *)A0 + 9) & 0x80) | |
2110 | tmp = -tmp; | |
2111 | fpush(); | |
2112 | ST0 = tmp; | |
2113 | } | |
2114 | ||
2115 | void helper_fbst_ST0_A0(void) | |
2116 | { | |
2117 | CPU86_LDouble tmp; | |
2118 | int v; | |
2119 | uint8_t *mem_ref, *mem_end; | |
2120 | int64_t val; | |
2121 | ||
2122 | tmp = rint(ST0); | |
2123 | val = (int64_t)tmp; | |
2124 | mem_ref = (uint8_t *)A0; | |
2125 | mem_end = mem_ref + 9; | |
2126 | if (val < 0) { | |
2127 | stb(mem_end, 0x80); | |
2128 | val = -val; | |
2129 | } else { | |
2130 | stb(mem_end, 0x00); | |
2131 | } | |
2132 | while (mem_ref < mem_end) { | |
2133 | if (val == 0) | |
2134 | break; | |
2135 | v = val % 100; | |
2136 | val = val / 100; | |
2137 | v = ((v / 10) << 4) | (v % 10); | |
2138 | stb(mem_ref++, v); | |
2139 | } | |
2140 | while (mem_ref < mem_end) { | |
2141 | stb(mem_ref++, 0); | |
2142 | } | |
2143 | } | |
2144 | ||
2145 | void helper_f2xm1(void) | |
2146 | { | |
2147 | ST0 = pow(2.0,ST0) - 1.0; | |
2148 | } | |
2149 | ||
2150 | void helper_fyl2x(void) | |
2151 | { | |
2152 | CPU86_LDouble fptemp; | |
2153 | ||
2154 | fptemp = ST0; | |
2155 | if (fptemp>0.0){ | |
2156 | fptemp = log(fptemp)/log(2.0); /* log2(ST) */ | |
2157 | ST1 *= fptemp; | |
2158 | fpop(); | |
2159 | } else { | |
2160 | env->fpus &= (~0x4700); | |
2161 | env->fpus |= 0x400; | |
2162 | } | |
2163 | } | |
2164 | ||
2165 | void helper_fptan(void) | |
2166 | { | |
2167 | CPU86_LDouble fptemp; | |
2168 | ||
2169 | fptemp = ST0; | |
2170 | if((fptemp > MAXTAN)||(fptemp < -MAXTAN)) { | |
2171 | env->fpus |= 0x400; | |
2172 | } else { | |
2173 | ST0 = tan(fptemp); | |
2174 | fpush(); | |
2175 | ST0 = 1.0; | |
2176 | env->fpus &= (~0x400); /* C2 <-- 0 */ | |
2177 | /* the above code is for |arg| < 2**52 only */ | |
2178 | } | |
2179 | } | |
2180 | ||
2181 | void helper_fpatan(void) | |
2182 | { | |
2183 | CPU86_LDouble fptemp, fpsrcop; | |
2184 | ||
2185 | fpsrcop = ST1; | |
2186 | fptemp = ST0; | |
2187 | ST1 = atan2(fpsrcop,fptemp); | |
2188 | fpop(); | |
2189 | } | |
2190 | ||
2191 | void helper_fxtract(void) | |
2192 | { | |
2193 | CPU86_LDoubleU temp; | |
2194 | unsigned int expdif; | |
2195 | ||
2196 | temp.d = ST0; | |
2197 | expdif = EXPD(temp) - EXPBIAS; | |
2198 | /*DP exponent bias*/ | |
2199 | ST0 = expdif; | |
2200 | fpush(); | |
2201 | BIASEXPONENT(temp); | |
2202 | ST0 = temp.d; | |
2203 | } | |
2204 | ||
2205 | void helper_fprem1(void) | |
2206 | { | |
2207 | CPU86_LDouble dblq, fpsrcop, fptemp; | |
2208 | CPU86_LDoubleU fpsrcop1, fptemp1; | |
2209 | int expdif; | |
2210 | int q; | |
2211 | ||
2212 | fpsrcop = ST0; | |
2213 | fptemp = ST1; | |
2214 | fpsrcop1.d = fpsrcop; | |
2215 | fptemp1.d = fptemp; | |
2216 | expdif = EXPD(fpsrcop1) - EXPD(fptemp1); | |
2217 | if (expdif < 53) { | |
2218 | dblq = fpsrcop / fptemp; | |
2219 | dblq = (dblq < 0.0)? ceil(dblq): floor(dblq); | |
2220 | ST0 = fpsrcop - fptemp*dblq; | |
2221 | q = (int)dblq; /* cutting off top bits is assumed here */ | |
2222 | env->fpus &= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */ | |
2223 | /* (C0,C1,C3) <-- (q2,q1,q0) */ | |
2224 | env->fpus |= (q&0x4) << 6; /* (C0) <-- q2 */ | |
2225 | env->fpus |= (q&0x2) << 8; /* (C1) <-- q1 */ | |
2226 | env->fpus |= (q&0x1) << 14; /* (C3) <-- q0 */ | |
2227 | } else { | |
2228 | env->fpus |= 0x400; /* C2 <-- 1 */ | |
2229 | fptemp = pow(2.0, expdif-50); | |
2230 | fpsrcop = (ST0 / ST1) / fptemp; | |
2231 | /* fpsrcop = integer obtained by rounding to the nearest */ | |
2232 | fpsrcop = (fpsrcop-floor(fpsrcop) < ceil(fpsrcop)-fpsrcop)? | |
2233 | floor(fpsrcop): ceil(fpsrcop); | |
2234 | ST0 -= (ST1 * fpsrcop * fptemp); | |
2235 | } | |
2236 | } | |
2237 | ||
2238 | void helper_fprem(void) | |
2239 | { | |
2240 | CPU86_LDouble dblq, fpsrcop, fptemp; | |
2241 | CPU86_LDoubleU fpsrcop1, fptemp1; | |
2242 | int expdif; | |
2243 | int q; | |
2244 | ||
2245 | fpsrcop = ST0; | |
2246 | fptemp = ST1; | |
2247 | fpsrcop1.d = fpsrcop; | |
2248 | fptemp1.d = fptemp; | |
2249 | expdif = EXPD(fpsrcop1) - EXPD(fptemp1); | |
2250 | if ( expdif < 53 ) { | |
2251 | dblq = fpsrcop / fptemp; | |
2252 | dblq = (dblq < 0.0)? ceil(dblq): floor(dblq); | |
2253 | ST0 = fpsrcop - fptemp*dblq; | |
2254 | q = (int)dblq; /* cutting off top bits is assumed here */ | |
2255 | env->fpus &= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */ | |
2256 | /* (C0,C1,C3) <-- (q2,q1,q0) */ | |
2257 | env->fpus |= (q&0x4) << 6; /* (C0) <-- q2 */ | |
2258 | env->fpus |= (q&0x2) << 8; /* (C1) <-- q1 */ | |
2259 | env->fpus |= (q&0x1) << 14; /* (C3) <-- q0 */ | |
2260 | } else { | |
2261 | env->fpus |= 0x400; /* C2 <-- 1 */ | |
2262 | fptemp = pow(2.0, expdif-50); | |
2263 | fpsrcop = (ST0 / ST1) / fptemp; | |
2264 | /* fpsrcop = integer obtained by chopping */ | |
2265 | fpsrcop = (fpsrcop < 0.0)? | |
2266 | -(floor(fabs(fpsrcop))): floor(fpsrcop); | |
2267 | ST0 -= (ST1 * fpsrcop * fptemp); | |
2268 | } | |
2269 | } | |
2270 | ||
2271 | void helper_fyl2xp1(void) | |
2272 | { | |
2273 | CPU86_LDouble fptemp; | |
2274 | ||
2275 | fptemp = ST0; | |
2276 | if ((fptemp+1.0)>0.0) { | |
2277 | fptemp = log(fptemp+1.0) / log(2.0); /* log2(ST+1.0) */ | |
2278 | ST1 *= fptemp; | |
2279 | fpop(); | |
2280 | } else { | |
2281 | env->fpus &= (~0x4700); | |
2282 | env->fpus |= 0x400; | |
2283 | } | |
2284 | } | |
2285 | ||
2286 | void helper_fsqrt(void) | |
2287 | { | |
2288 | CPU86_LDouble fptemp; | |
2289 | ||
2290 | fptemp = ST0; | |
2291 | if (fptemp<0.0) { | |
2292 | env->fpus &= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */ | |
2293 | env->fpus |= 0x400; | |
2294 | } | |
2295 | ST0 = sqrt(fptemp); | |
2296 | } | |
2297 | ||
2298 | void helper_fsincos(void) | |
2299 | { | |
2300 | CPU86_LDouble fptemp; | |
2301 | ||
2302 | fptemp = ST0; | |
2303 | if ((fptemp > MAXTAN)||(fptemp < -MAXTAN)) { | |
2304 | env->fpus |= 0x400; | |
2305 | } else { | |
2306 | ST0 = sin(fptemp); | |
2307 | fpush(); | |
2308 | ST0 = cos(fptemp); | |
2309 | env->fpus &= (~0x400); /* C2 <-- 0 */ | |
2310 | /* the above code is for |arg| < 2**63 only */ | |
2311 | } | |
2312 | } | |
2313 | ||
2314 | void helper_frndint(void) | |
2315 | { | |
2316 | CPU86_LDouble a; | |
2317 | ||
2318 | a = ST0; | |
2319 | #ifdef __arm__ | |
2320 | switch(env->fpuc & RC_MASK) { | |
2321 | default: | |
2322 | case RC_NEAR: | |
2323 | asm("rndd %0, %1" : "=f" (a) : "f"(a)); | |
2324 | break; | |
2325 | case RC_DOWN: | |
2326 | asm("rnddm %0, %1" : "=f" (a) : "f"(a)); | |
2327 | break; | |
2328 | case RC_UP: | |
2329 | asm("rnddp %0, %1" : "=f" (a) : "f"(a)); | |
2330 | break; | |
2331 | case RC_CHOP: | |
2332 | asm("rnddz %0, %1" : "=f" (a) : "f"(a)); | |
2333 | break; | |
2334 | } | |
2335 | #else | |
2336 | a = rint(a); | |
2337 | #endif | |
2338 | ST0 = a; | |
2339 | } | |
2340 | ||
2341 | void helper_fscale(void) | |
2342 | { | |
2343 | CPU86_LDouble fpsrcop, fptemp; | |
2344 | ||
2345 | fpsrcop = 2.0; | |
2346 | fptemp = pow(fpsrcop,ST1); | |
2347 | ST0 *= fptemp; | |
2348 | } | |
2349 | ||
2350 | void helper_fsin(void) | |
2351 | { | |
2352 | CPU86_LDouble fptemp; | |
2353 | ||
2354 | fptemp = ST0; | |
2355 | if ((fptemp > MAXTAN)||(fptemp < -MAXTAN)) { | |
2356 | env->fpus |= 0x400; | |
2357 | } else { | |
2358 | ST0 = sin(fptemp); | |
2359 | env->fpus &= (~0x400); /* C2 <-- 0 */ | |
2360 | /* the above code is for |arg| < 2**53 only */ | |
2361 | } | |
2362 | } | |
2363 | ||
2364 | void helper_fcos(void) | |
2365 | { | |
2366 | CPU86_LDouble fptemp; | |
2367 | ||
2368 | fptemp = ST0; | |
2369 | if((fptemp > MAXTAN)||(fptemp < -MAXTAN)) { | |
2370 | env->fpus |= 0x400; | |
2371 | } else { | |
2372 | ST0 = cos(fptemp); | |
2373 | env->fpus &= (~0x400); /* C2 <-- 0 */ | |
2374 | /* the above code is for |arg5 < 2**63 only */ | |
2375 | } | |
2376 | } | |
2377 | ||
2378 | void helper_fxam_ST0(void) | |
2379 | { | |
2380 | CPU86_LDoubleU temp; | |
2381 | int expdif; | |
2382 | ||
2383 | temp.d = ST0; | |
2384 | ||
2385 | env->fpus &= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */ | |
2386 | if (SIGND(temp)) | |
2387 | env->fpus |= 0x200; /* C1 <-- 1 */ | |
2388 | ||
2389 | expdif = EXPD(temp); | |
2390 | if (expdif == MAXEXPD) { | |
2391 | if (MANTD(temp) == 0) | |
2392 | env->fpus |= 0x500 /*Infinity*/; | |
2393 | else | |
2394 | env->fpus |= 0x100 /*NaN*/; | |
2395 | } else if (expdif == 0) { | |
2396 | if (MANTD(temp) == 0) | |
2397 | env->fpus |= 0x4000 /*Zero*/; | |
2398 | else | |
2399 | env->fpus |= 0x4400 /*Denormal*/; | |
2400 | } else { | |
2401 | env->fpus |= 0x400; | |
2402 | } | |
2403 | } | |
2404 | ||
2405 | void helper_fstenv(uint8_t *ptr, int data32) | |
2406 | { | |
2407 | int fpus, fptag, exp, i; | |
2408 | uint64_t mant; | |
2409 | CPU86_LDoubleU tmp; | |
2410 | ||
2411 | fpus = (env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11; | |
2412 | fptag = 0; | |
2413 | for (i=7; i>=0; i--) { | |
2414 | fptag <<= 2; | |
2415 | if (env->fptags[i]) { | |
2416 | fptag |= 3; | |
2417 | } else { | |
2418 | tmp.d = env->fpregs[i]; | |
2419 | exp = EXPD(tmp); | |
2420 | mant = MANTD(tmp); | |
2421 | if (exp == 0 && mant == 0) { | |
2422 | /* zero */ | |
2423 | fptag |= 1; | |
2424 | } else if (exp == 0 || exp == MAXEXPD | |
2425 | #ifdef USE_X86LDOUBLE | |
2426 | || (mant & (1LL << 63)) == 0 | |
2427 | #endif | |
2428 | ) { | |
2429 | /* NaNs, infinity, denormal */ | |
2430 | fptag |= 2; | |
2431 | } | |
2432 | } | |
2433 | } | |
2434 | if (data32) { | |
2435 | /* 32 bit */ | |
2436 | stl(ptr, env->fpuc); | |
2437 | stl(ptr + 4, fpus); | |
2438 | stl(ptr + 8, fptag); | |
2edcdce3 FB |
2439 | stl(ptr + 12, 0); /* fpip */ |
2440 | stl(ptr + 16, 0); /* fpcs */ | |
2441 | stl(ptr + 20, 0); /* fpoo */ | |
2442 | stl(ptr + 24, 0); /* fpos */ | |
2c0262af FB |
2443 | } else { |
2444 | /* 16 bit */ | |
2445 | stw(ptr, env->fpuc); | |
2446 | stw(ptr + 2, fpus); | |
2447 | stw(ptr + 4, fptag); | |
2448 | stw(ptr + 6, 0); | |
2449 | stw(ptr + 8, 0); | |
2450 | stw(ptr + 10, 0); | |
2451 | stw(ptr + 12, 0); | |
2452 | } | |
2453 | } | |
2454 | ||
2455 | void helper_fldenv(uint8_t *ptr, int data32) | |
2456 | { | |
2457 | int i, fpus, fptag; | |
2458 | ||
2459 | if (data32) { | |
2460 | env->fpuc = lduw(ptr); | |
2461 | fpus = lduw(ptr + 4); | |
2462 | fptag = lduw(ptr + 8); | |
2463 | } | |
2464 | else { | |
2465 | env->fpuc = lduw(ptr); | |
2466 | fpus = lduw(ptr + 2); | |
2467 | fptag = lduw(ptr + 4); | |
2468 | } | |
2469 | env->fpstt = (fpus >> 11) & 7; | |
2470 | env->fpus = fpus & ~0x3800; | |
2edcdce3 | 2471 | for(i = 0;i < 8; i++) { |
2c0262af FB |
2472 | env->fptags[i] = ((fptag & 3) == 3); |
2473 | fptag >>= 2; | |
2474 | } | |
2475 | } | |
2476 | ||
2477 | void helper_fsave(uint8_t *ptr, int data32) | |
2478 | { | |
2479 | CPU86_LDouble tmp; | |
2480 | int i; | |
2481 | ||
2482 | helper_fstenv(ptr, data32); | |
2483 | ||
2484 | ptr += (14 << data32); | |
2485 | for(i = 0;i < 8; i++) { | |
2486 | tmp = ST(i); | |
2c0262af | 2487 | helper_fstt(tmp, ptr); |
2c0262af FB |
2488 | ptr += 10; |
2489 | } | |
2490 | ||
2491 | /* fninit */ | |
2492 | env->fpus = 0; | |
2493 | env->fpstt = 0; | |
2494 | env->fpuc = 0x37f; | |
2495 | env->fptags[0] = 1; | |
2496 | env->fptags[1] = 1; | |
2497 | env->fptags[2] = 1; | |
2498 | env->fptags[3] = 1; | |
2499 | env->fptags[4] = 1; | |
2500 | env->fptags[5] = 1; | |
2501 | env->fptags[6] = 1; | |
2502 | env->fptags[7] = 1; | |
2503 | } | |
2504 | ||
2505 | void helper_frstor(uint8_t *ptr, int data32) | |
2506 | { | |
2507 | CPU86_LDouble tmp; | |
2508 | int i; | |
2509 | ||
2510 | helper_fldenv(ptr, data32); | |
2511 | ptr += (14 << data32); | |
2512 | ||
2513 | for(i = 0;i < 8; i++) { | |
2c0262af | 2514 | tmp = helper_fldt(ptr); |
2c0262af FB |
2515 | ST(i) = tmp; |
2516 | ptr += 10; | |
2517 | } | |
2518 | } | |
2519 | ||
1f1af9fd FB |
2520 | /* XXX: merge with helper_fstt ? */ |
2521 | ||
2522 | #ifndef USE_X86LDOUBLE | |
2523 | ||
2524 | void cpu_get_fp80(uint64_t *pmant, uint16_t *pexp, CPU86_LDouble f) | |
2525 | { | |
2526 | CPU86_LDoubleU temp; | |
2527 | int e; | |
2528 | ||
2529 | temp.d = f; | |
2530 | /* mantissa */ | |
2531 | *pmant = (MANTD(temp) << 11) | (1LL << 63); | |
2532 | /* exponent + sign */ | |
2533 | e = EXPD(temp) - EXPBIAS + 16383; | |
2534 | e |= SIGND(temp) >> 16; | |
2535 | *pexp = e; | |
2536 | } | |
2537 | ||
2538 | CPU86_LDouble cpu_set_fp80(uint64_t mant, uint16_t upper) | |
2539 | { | |
2540 | CPU86_LDoubleU temp; | |
2541 | int e; | |
2542 | uint64_t ll; | |
2543 | ||
2544 | /* XXX: handle overflow ? */ | |
2545 | e = (upper & 0x7fff) - 16383 + EXPBIAS; /* exponent */ | |
2546 | e |= (upper >> 4) & 0x800; /* sign */ | |
2547 | ll = (mant >> 11) & ((1LL << 52) - 1); | |
2548 | #ifdef __arm__ | |
2549 | temp.l.upper = (e << 20) | (ll >> 32); | |
2550 | temp.l.lower = ll; | |
2551 | #else | |
2552 | temp.ll = ll | ((uint64_t)e << 52); | |
2553 | #endif | |
2554 | return temp.d; | |
2555 | } | |
2556 | ||
2557 | #else | |
2558 | ||
2559 | void cpu_get_fp80(uint64_t *pmant, uint16_t *pexp, CPU86_LDouble f) | |
2560 | { | |
2561 | CPU86_LDoubleU temp; | |
2562 | ||
2563 | temp.d = f; | |
2564 | *pmant = temp.l.lower; | |
2565 | *pexp = temp.l.upper; | |
2566 | } | |
2567 | ||
2568 | CPU86_LDouble cpu_set_fp80(uint64_t mant, uint16_t upper) | |
2569 | { | |
2570 | CPU86_LDoubleU temp; | |
2571 | ||
2572 | temp.l.upper = upper; | |
2573 | temp.l.lower = mant; | |
2574 | return temp.d; | |
2575 | } | |
2576 | #endif | |
2577 | ||
61382a50 FB |
2578 | #if !defined(CONFIG_USER_ONLY) |
2579 | ||
2580 | #define MMUSUFFIX _mmu | |
2581 | #define GETPC() (__builtin_return_address(0)) | |
2582 | ||
2c0262af FB |
2583 | #define SHIFT 0 |
2584 | #include "softmmu_template.h" | |
2585 | ||
2586 | #define SHIFT 1 | |
2587 | #include "softmmu_template.h" | |
2588 | ||
2589 | #define SHIFT 2 | |
2590 | #include "softmmu_template.h" | |
2591 | ||
2592 | #define SHIFT 3 | |
2593 | #include "softmmu_template.h" | |
2594 | ||
61382a50 FB |
2595 | #endif |
2596 | ||
2597 | /* try to fill the TLB and return an exception if error. If retaddr is | |
2598 | NULL, it means that the function was called in C code (i.e. not | |
2599 | from generated code or from helper.c) */ | |
2600 | /* XXX: fix it to restore all registers */ | |
2601 | void tlb_fill(unsigned long addr, int is_write, int is_user, void *retaddr) | |
2c0262af FB |
2602 | { |
2603 | TranslationBlock *tb; | |
2604 | int ret; | |
2605 | unsigned long pc; | |
61382a50 FB |
2606 | CPUX86State *saved_env; |
2607 | ||
2608 | /* XXX: hack to restore env in all cases, even if not called from | |
2609 | generated code */ | |
2610 | saved_env = env; | |
2611 | env = cpu_single_env; | |
61382a50 FB |
2612 | |
2613 | ret = cpu_x86_handle_mmu_fault(env, addr, is_write, is_user, 1); | |
2c0262af | 2614 | if (ret) { |
61382a50 FB |
2615 | if (retaddr) { |
2616 | /* now we have a real cpu fault */ | |
2617 | pc = (unsigned long)retaddr; | |
2618 | tb = tb_find_pc(pc); | |
2619 | if (tb) { | |
2620 | /* the PC is inside the translated code. It means that we have | |
2621 | a virtual CPU fault */ | |
58fe2f10 | 2622 | cpu_restore_state(tb, env, pc, NULL); |
61382a50 | 2623 | } |
2c0262af | 2624 | } |
0d1a29f9 FB |
2625 | if (retaddr) |
2626 | raise_exception_err(EXCP0E_PAGE, env->error_code); | |
2627 | else | |
2628 | raise_exception_err_norestore(EXCP0E_PAGE, env->error_code); | |
2c0262af | 2629 | } |
61382a50 | 2630 | env = saved_env; |
2c0262af | 2631 | } |