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[qemu.git] / target-i386 / helper.c
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
22 //#define DEBUG_PCALL
23
24 #if 0
25 #define raise_exception_err(a, b)\
26 do {\
27 if (logfile)\
28 fprintf(logfile, "raise_exception line=%d\n", __LINE__);\
29 (raise_exception_err)(a, b);\
30 } while (0)
31 #endif
32
33 const uint8_t parity_table[256] = {
34 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
35 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
36 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
37 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
38 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
39 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
40 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
41 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
42 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
43 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
44 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
45 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
46 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
47 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
48 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
49 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
50 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
51 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
52 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
53 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
54 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
55 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
56 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
57 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
58 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
59 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
60 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
61 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
62 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
63 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
64 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
65 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
66 };
67
68 /* modulo 17 table */
69 const uint8_t rclw_table[32] = {
70 0, 1, 2, 3, 4, 5, 6, 7,
71 8, 9,10,11,12,13,14,15,
72 16, 0, 1, 2, 3, 4, 5, 6,
73 7, 8, 9,10,11,12,13,14,
74 };
75
76 /* modulo 9 table */
77 const uint8_t rclb_table[32] = {
78 0, 1, 2, 3, 4, 5, 6, 7,
79 8, 0, 1, 2, 3, 4, 5, 6,
80 7, 8, 0, 1, 2, 3, 4, 5,
81 6, 7, 8, 0, 1, 2, 3, 4,
82 };
83
84 const CPU86_LDouble f15rk[7] =
85 {
86 0.00000000000000000000L,
87 1.00000000000000000000L,
88 3.14159265358979323851L, /*pi*/
89 0.30102999566398119523L, /*lg2*/
90 0.69314718055994530943L, /*ln2*/
91 1.44269504088896340739L, /*l2e*/
92 3.32192809488736234781L, /*l2t*/
93 };
94
95 /* thread support */
96
97 spinlock_t global_cpu_lock = SPIN_LOCK_UNLOCKED;
98
99 void cpu_lock(void)
100 {
101 spin_lock(&global_cpu_lock);
102 }
103
104 void cpu_unlock(void)
105 {
106 spin_unlock(&global_cpu_lock);
107 }
108
109 void cpu_loop_exit(void)
110 {
111 /* NOTE: the register at this point must be saved by hand because
112 longjmp restore them */
113 regs_to_env();
114 longjmp(env->jmp_env, 1);
115 }
116
117 /* return non zero if error */
118 static inline int load_segment(uint32_t *e1_ptr, uint32_t *e2_ptr,
119 int selector)
120 {
121 SegmentCache *dt;
122 int index;
123 target_ulong ptr;
124
125 if (selector & 0x4)
126 dt = &env->ldt;
127 else
128 dt = &env->gdt;
129 index = selector & ~7;
130 if ((index + 7) > dt->limit)
131 return -1;
132 ptr = dt->base + index;
133 *e1_ptr = ldl_kernel(ptr);
134 *e2_ptr = ldl_kernel(ptr + 4);
135 return 0;
136 }
137
138 static inline unsigned int get_seg_limit(uint32_t e1, uint32_t e2)
139 {
140 unsigned int limit;
141 limit = (e1 & 0xffff) | (e2 & 0x000f0000);
142 if (e2 & DESC_G_MASK)
143 limit = (limit << 12) | 0xfff;
144 return limit;
145 }
146
147 static inline uint32_t get_seg_base(uint32_t e1, uint32_t e2)
148 {
149 return ((e1 >> 16) | ((e2 & 0xff) << 16) | (e2 & 0xff000000));
150 }
151
152 static inline void load_seg_cache_raw_dt(SegmentCache *sc, uint32_t e1, uint32_t e2)
153 {
154 sc->base = get_seg_base(e1, e2);
155 sc->limit = get_seg_limit(e1, e2);
156 sc->flags = e2;
157 }
158
159 /* init the segment cache in vm86 mode. */
160 static inline void load_seg_vm(int seg, int selector)
161 {
162 selector &= 0xffff;
163 cpu_x86_load_seg_cache(env, seg, selector,
164 (selector << 4), 0xffff, 0);
165 }
166
167 static inline void get_ss_esp_from_tss(uint32_t *ss_ptr,
168 uint32_t *esp_ptr, int dpl)
169 {
170 int type, index, shift;
171
172 #if 0
173 {
174 int i;
175 printf("TR: base=%p limit=%x\n", env->tr.base, env->tr.limit);
176 for(i=0;i<env->tr.limit;i++) {
177 printf("%02x ", env->tr.base[i]);
178 if ((i & 7) == 7) printf("\n");
179 }
180 printf("\n");
181 }
182 #endif
183
184 if (!(env->tr.flags & DESC_P_MASK))
185 cpu_abort(env, "invalid tss");
186 type = (env->tr.flags >> DESC_TYPE_SHIFT) & 0xf;
187 if ((type & 7) != 1)
188 cpu_abort(env, "invalid tss type");
189 shift = type >> 3;
190 index = (dpl * 4 + 2) << shift;
191 if (index + (4 << shift) - 1 > env->tr.limit)
192 raise_exception_err(EXCP0A_TSS, env->tr.selector & 0xfffc);
193 if (shift == 0) {
194 *esp_ptr = lduw_kernel(env->tr.base + index);
195 *ss_ptr = lduw_kernel(env->tr.base + index + 2);
196 } else {
197 *esp_ptr = ldl_kernel(env->tr.base + index);
198 *ss_ptr = lduw_kernel(env->tr.base + index + 4);
199 }
200 }
201
202 /* XXX: merge with load_seg() */
203 static void tss_load_seg(int seg_reg, int selector)
204 {
205 uint32_t e1, e2;
206 int rpl, dpl, cpl;
207
208 if ((selector & 0xfffc) != 0) {
209 if (load_segment(&e1, &e2, selector) != 0)
210 raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
211 if (!(e2 & DESC_S_MASK))
212 raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
213 rpl = selector & 3;
214 dpl = (e2 >> DESC_DPL_SHIFT) & 3;
215 cpl = env->hflags & HF_CPL_MASK;
216 if (seg_reg == R_CS) {
217 if (!(e2 & DESC_CS_MASK))
218 raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
219 /* XXX: is it correct ? */
220 if (dpl != rpl)
221 raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
222 if ((e2 & DESC_C_MASK) && dpl > rpl)
223 raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
224 } else if (seg_reg == R_SS) {
225 /* SS must be writable data */
226 if ((e2 & DESC_CS_MASK) || !(e2 & DESC_W_MASK))
227 raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
228 if (dpl != cpl || dpl != rpl)
229 raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
230 } else {
231 /* not readable code */
232 if ((e2 & DESC_CS_MASK) && !(e2 & DESC_R_MASK))
233 raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
234 /* if data or non conforming code, checks the rights */
235 if (((e2 >> DESC_TYPE_SHIFT) & 0xf) < 12) {
236 if (dpl < cpl || dpl < rpl)
237 raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
238 }
239 }
240 if (!(e2 & DESC_P_MASK))
241 raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc);
242 cpu_x86_load_seg_cache(env, seg_reg, selector,
243 get_seg_base(e1, e2),
244 get_seg_limit(e1, e2),
245 e2);
246 } else {
247 if (seg_reg == R_SS || seg_reg == R_CS)
248 raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
249 }
250 }
251
252 #define SWITCH_TSS_JMP 0
253 #define SWITCH_TSS_IRET 1
254 #define SWITCH_TSS_CALL 2
255
256 /* XXX: restore CPU state in registers (PowerPC case) */
257 static void switch_tss(int tss_selector,
258 uint32_t e1, uint32_t e2, int source,
259 uint32_t next_eip)
260 {
261 int tss_limit, tss_limit_max, type, old_tss_limit_max, old_type, v1, v2, i;
262 target_ulong tss_base;
263 uint32_t new_regs[8], new_segs[6];
264 uint32_t new_eflags, new_eip, new_cr3, new_ldt, new_trap;
265 uint32_t old_eflags, eflags_mask;
266 SegmentCache *dt;
267 int index;
268 target_ulong ptr;
269
270 type = (e2 >> DESC_TYPE_SHIFT) & 0xf;
271 #ifdef DEBUG_PCALL
272 if (loglevel & CPU_LOG_PCALL)
273 fprintf(logfile, "switch_tss: sel=0x%04x type=%d src=%d\n", tss_selector, type, source);
274 #endif
275
276 /* if task gate, we read the TSS segment and we load it */
277 if (type == 5) {
278 if (!(e2 & DESC_P_MASK))
279 raise_exception_err(EXCP0B_NOSEG, tss_selector & 0xfffc);
280 tss_selector = e1 >> 16;
281 if (tss_selector & 4)
282 raise_exception_err(EXCP0A_TSS, tss_selector & 0xfffc);
283 if (load_segment(&e1, &e2, tss_selector) != 0)
284 raise_exception_err(EXCP0D_GPF, tss_selector & 0xfffc);
285 if (e2 & DESC_S_MASK)
286 raise_exception_err(EXCP0D_GPF, tss_selector & 0xfffc);
287 type = (e2 >> DESC_TYPE_SHIFT) & 0xf;
288 if ((type & 7) != 1)
289 raise_exception_err(EXCP0D_GPF, tss_selector & 0xfffc);
290 }
291
292 if (!(e2 & DESC_P_MASK))
293 raise_exception_err(EXCP0B_NOSEG, tss_selector & 0xfffc);
294
295 if (type & 8)
296 tss_limit_max = 103;
297 else
298 tss_limit_max = 43;
299 tss_limit = get_seg_limit(e1, e2);
300 tss_base = get_seg_base(e1, e2);
301 if ((tss_selector & 4) != 0 ||
302 tss_limit < tss_limit_max)
303 raise_exception_err(EXCP0A_TSS, tss_selector & 0xfffc);
304 old_type = (env->tr.flags >> DESC_TYPE_SHIFT) & 0xf;
305 if (old_type & 8)
306 old_tss_limit_max = 103;
307 else
308 old_tss_limit_max = 43;
309
310 /* read all the registers from the new TSS */
311 if (type & 8) {
312 /* 32 bit */
313 new_cr3 = ldl_kernel(tss_base + 0x1c);
314 new_eip = ldl_kernel(tss_base + 0x20);
315 new_eflags = ldl_kernel(tss_base + 0x24);
316 for(i = 0; i < 8; i++)
317 new_regs[i] = ldl_kernel(tss_base + (0x28 + i * 4));
318 for(i = 0; i < 6; i++)
319 new_segs[i] = lduw_kernel(tss_base + (0x48 + i * 4));
320 new_ldt = lduw_kernel(tss_base + 0x60);
321 new_trap = ldl_kernel(tss_base + 0x64);
322 } else {
323 /* 16 bit */
324 new_cr3 = 0;
325 new_eip = lduw_kernel(tss_base + 0x0e);
326 new_eflags = lduw_kernel(tss_base + 0x10);
327 for(i = 0; i < 8; i++)
328 new_regs[i] = lduw_kernel(tss_base + (0x12 + i * 2)) | 0xffff0000;
329 for(i = 0; i < 4; i++)
330 new_segs[i] = lduw_kernel(tss_base + (0x22 + i * 4));
331 new_ldt = lduw_kernel(tss_base + 0x2a);
332 new_segs[R_FS] = 0;
333 new_segs[R_GS] = 0;
334 new_trap = 0;
335 }
336
337 /* NOTE: we must avoid memory exceptions during the task switch,
338 so we make dummy accesses before */
339 /* XXX: it can still fail in some cases, so a bigger hack is
340 necessary to valid the TLB after having done the accesses */
341
342 v1 = ldub_kernel(env->tr.base);
343 v2 = ldub_kernel(env->tr.base + old_tss_limit_max);
344 stb_kernel(env->tr.base, v1);
345 stb_kernel(env->tr.base + old_tss_limit_max, v2);
346
347 /* clear busy bit (it is restartable) */
348 if (source == SWITCH_TSS_JMP || source == SWITCH_TSS_IRET) {
349 target_ulong ptr;
350 uint32_t e2;
351 ptr = env->gdt.base + (env->tr.selector & ~7);
352 e2 = ldl_kernel(ptr + 4);
353 e2 &= ~DESC_TSS_BUSY_MASK;
354 stl_kernel(ptr + 4, e2);
355 }
356 old_eflags = compute_eflags();
357 if (source == SWITCH_TSS_IRET)
358 old_eflags &= ~NT_MASK;
359
360 /* save the current state in the old TSS */
361 if (type & 8) {
362 /* 32 bit */
363 stl_kernel(env->tr.base + 0x20, next_eip);
364 stl_kernel(env->tr.base + 0x24, old_eflags);
365 stl_kernel(env->tr.base + (0x28 + 0 * 4), EAX);
366 stl_kernel(env->tr.base + (0x28 + 1 * 4), ECX);
367 stl_kernel(env->tr.base + (0x28 + 2 * 4), EDX);
368 stl_kernel(env->tr.base + (0x28 + 3 * 4), EBX);
369 stl_kernel(env->tr.base + (0x28 + 4 * 4), ESP);
370 stl_kernel(env->tr.base + (0x28 + 5 * 4), EBP);
371 stl_kernel(env->tr.base + (0x28 + 6 * 4), ESI);
372 stl_kernel(env->tr.base + (0x28 + 7 * 4), EDI);
373 for(i = 0; i < 6; i++)
374 stw_kernel(env->tr.base + (0x48 + i * 4), env->segs[i].selector);
375 } else {
376 /* 16 bit */
377 stw_kernel(env->tr.base + 0x0e, next_eip);
378 stw_kernel(env->tr.base + 0x10, old_eflags);
379 stw_kernel(env->tr.base + (0x12 + 0 * 2), EAX);
380 stw_kernel(env->tr.base + (0x12 + 1 * 2), ECX);
381 stw_kernel(env->tr.base + (0x12 + 2 * 2), EDX);
382 stw_kernel(env->tr.base + (0x12 + 3 * 2), EBX);
383 stw_kernel(env->tr.base + (0x12 + 4 * 2), ESP);
384 stw_kernel(env->tr.base + (0x12 + 5 * 2), EBP);
385 stw_kernel(env->tr.base + (0x12 + 6 * 2), ESI);
386 stw_kernel(env->tr.base + (0x12 + 7 * 2), EDI);
387 for(i = 0; i < 4; i++)
388 stw_kernel(env->tr.base + (0x22 + i * 4), env->segs[i].selector);
389 }
390
391 /* now if an exception occurs, it will occurs in the next task
392 context */
393
394 if (source == SWITCH_TSS_CALL) {
395 stw_kernel(tss_base, env->tr.selector);
396 new_eflags |= NT_MASK;
397 }
398
399 /* set busy bit */
400 if (source == SWITCH_TSS_JMP || source == SWITCH_TSS_CALL) {
401 target_ulong ptr;
402 uint32_t e2;
403 ptr = env->gdt.base + (tss_selector & ~7);
404 e2 = ldl_kernel(ptr + 4);
405 e2 |= DESC_TSS_BUSY_MASK;
406 stl_kernel(ptr + 4, e2);
407 }
408
409 /* set the new CPU state */
410 /* from this point, any exception which occurs can give problems */
411 env->cr[0] |= CR0_TS_MASK;
412 env->hflags |= HF_TS_MASK;
413 env->tr.selector = tss_selector;
414 env->tr.base = tss_base;
415 env->tr.limit = tss_limit;
416 env->tr.flags = e2 & ~DESC_TSS_BUSY_MASK;
417
418 if ((type & 8) && (env->cr[0] & CR0_PG_MASK)) {
419 cpu_x86_update_cr3(env, new_cr3);
420 }
421
422 /* load all registers without an exception, then reload them with
423 possible exception */
424 env->eip = new_eip;
425 eflags_mask = TF_MASK | AC_MASK | ID_MASK |
426 IF_MASK | IOPL_MASK | VM_MASK | RF_MASK | NT_MASK;
427 if (!(type & 8))
428 eflags_mask &= 0xffff;
429 load_eflags(new_eflags, eflags_mask);
430 /* XXX: what to do in 16 bit case ? */
431 EAX = new_regs[0];
432 ECX = new_regs[1];
433 EDX = new_regs[2];
434 EBX = new_regs[3];
435 ESP = new_regs[4];
436 EBP = new_regs[5];
437 ESI = new_regs[6];
438 EDI = new_regs[7];
439 if (new_eflags & VM_MASK) {
440 for(i = 0; i < 6; i++)
441 load_seg_vm(i, new_segs[i]);
442 /* in vm86, CPL is always 3 */
443 cpu_x86_set_cpl(env, 3);
444 } else {
445 /* CPL is set the RPL of CS */
446 cpu_x86_set_cpl(env, new_segs[R_CS] & 3);
447 /* first just selectors as the rest may trigger exceptions */
448 for(i = 0; i < 6; i++)
449 cpu_x86_load_seg_cache(env, i, new_segs[i], 0, 0, 0);
450 }
451
452 env->ldt.selector = new_ldt & ~4;
453 env->ldt.base = 0;
454 env->ldt.limit = 0;
455 env->ldt.flags = 0;
456
457 /* load the LDT */
458 if (new_ldt & 4)
459 raise_exception_err(EXCP0A_TSS, new_ldt & 0xfffc);
460
461 if ((new_ldt & 0xfffc) != 0) {
462 dt = &env->gdt;
463 index = new_ldt & ~7;
464 if ((index + 7) > dt->limit)
465 raise_exception_err(EXCP0A_TSS, new_ldt & 0xfffc);
466 ptr = dt->base + index;
467 e1 = ldl_kernel(ptr);
468 e2 = ldl_kernel(ptr + 4);
469 if ((e2 & DESC_S_MASK) || ((e2 >> DESC_TYPE_SHIFT) & 0xf) != 2)
470 raise_exception_err(EXCP0A_TSS, new_ldt & 0xfffc);
471 if (!(e2 & DESC_P_MASK))
472 raise_exception_err(EXCP0A_TSS, new_ldt & 0xfffc);
473 load_seg_cache_raw_dt(&env->ldt, e1, e2);
474 }
475
476 /* load the segments */
477 if (!(new_eflags & VM_MASK)) {
478 tss_load_seg(R_CS, new_segs[R_CS]);
479 tss_load_seg(R_SS, new_segs[R_SS]);
480 tss_load_seg(R_ES, new_segs[R_ES]);
481 tss_load_seg(R_DS, new_segs[R_DS]);
482 tss_load_seg(R_FS, new_segs[R_FS]);
483 tss_load_seg(R_GS, new_segs[R_GS]);
484 }
485
486 /* check that EIP is in the CS segment limits */
487 if (new_eip > env->segs[R_CS].limit) {
488 /* XXX: different exception if CALL ? */
489 raise_exception_err(EXCP0D_GPF, 0);
490 }
491 }
492
493 /* check if Port I/O is allowed in TSS */
494 static inline void check_io(int addr, int size)
495 {
496 int io_offset, val, mask;
497
498 /* TSS must be a valid 32 bit one */
499 if (!(env->tr.flags & DESC_P_MASK) ||
500 ((env->tr.flags >> DESC_TYPE_SHIFT) & 0xf) != 9 ||
501 env->tr.limit < 103)
502 goto fail;
503 io_offset = lduw_kernel(env->tr.base + 0x66);
504 io_offset += (addr >> 3);
505 /* Note: the check needs two bytes */
506 if ((io_offset + 1) > env->tr.limit)
507 goto fail;
508 val = lduw_kernel(env->tr.base + io_offset);
509 val >>= (addr & 7);
510 mask = (1 << size) - 1;
511 /* all bits must be zero to allow the I/O */
512 if ((val & mask) != 0) {
513 fail:
514 raise_exception_err(EXCP0D_GPF, 0);
515 }
516 }
517
518 void check_iob_T0(void)
519 {
520 check_io(T0, 1);
521 }
522
523 void check_iow_T0(void)
524 {
525 check_io(T0, 2);
526 }
527
528 void check_iol_T0(void)
529 {
530 check_io(T0, 4);
531 }
532
533 void check_iob_DX(void)
534 {
535 check_io(EDX & 0xffff, 1);
536 }
537
538 void check_iow_DX(void)
539 {
540 check_io(EDX & 0xffff, 2);
541 }
542
543 void check_iol_DX(void)
544 {
545 check_io(EDX & 0xffff, 4);
546 }
547
548 static inline unsigned int get_sp_mask(unsigned int e2)
549 {
550 if (e2 & DESC_B_MASK)
551 return 0xffffffff;
552 else
553 return 0xffff;
554 }
555
556 /* XXX: add a is_user flag to have proper security support */
557 #define PUSHW(ssp, sp, sp_mask, val)\
558 {\
559 sp -= 2;\
560 stw_kernel((ssp) + (sp & (sp_mask)), (val));\
561 }
562
563 #define PUSHL(ssp, sp, sp_mask, val)\
564 {\
565 sp -= 4;\
566 stl_kernel((ssp) + (sp & (sp_mask)), (val));\
567 }
568
569 #define POPW(ssp, sp, sp_mask, val)\
570 {\
571 val = lduw_kernel((ssp) + (sp & (sp_mask)));\
572 sp += 2;\
573 }
574
575 #define POPL(ssp, sp, sp_mask, val)\
576 {\
577 val = (uint32_t)ldl_kernel((ssp) + (sp & (sp_mask)));\
578 sp += 4;\
579 }
580
581 /* protected mode interrupt */
582 static void do_interrupt_protected(int intno, int is_int, int error_code,
583 unsigned int next_eip, int is_hw)
584 {
585 SegmentCache *dt;
586 target_ulong ptr, ssp;
587 int type, dpl, selector, ss_dpl, cpl, sp_mask;
588 int has_error_code, new_stack, shift;
589 uint32_t e1, e2, offset, ss, esp, ss_e1, ss_e2;
590 uint32_t old_eip;
591
592 has_error_code = 0;
593 if (!is_int && !is_hw) {
594 switch(intno) {
595 case 8:
596 case 10:
597 case 11:
598 case 12:
599 case 13:
600 case 14:
601 case 17:
602 has_error_code = 1;
603 break;
604 }
605 }
606 if (is_int)
607 old_eip = next_eip;
608 else
609 old_eip = env->eip;
610
611 dt = &env->idt;
612 if (intno * 8 + 7 > dt->limit)
613 raise_exception_err(EXCP0D_GPF, intno * 8 + 2);
614 ptr = dt->base + intno * 8;
615 e1 = ldl_kernel(ptr);
616 e2 = ldl_kernel(ptr + 4);
617 /* check gate type */
618 type = (e2 >> DESC_TYPE_SHIFT) & 0x1f;
619 switch(type) {
620 case 5: /* task gate */
621 /* must do that check here to return the correct error code */
622 if (!(e2 & DESC_P_MASK))
623 raise_exception_err(EXCP0B_NOSEG, intno * 8 + 2);
624 switch_tss(intno * 8, e1, e2, SWITCH_TSS_CALL, old_eip);
625 if (has_error_code) {
626 int mask, type;
627 /* push the error code */
628 type = (env->tr.flags >> DESC_TYPE_SHIFT) & 0xf;
629 shift = type >> 3;
630 if (env->segs[R_SS].flags & DESC_B_MASK)
631 mask = 0xffffffff;
632 else
633 mask = 0xffff;
634 esp = (ESP - (2 << shift)) & mask;
635 ssp = env->segs[R_SS].base + esp;
636 if (shift)
637 stl_kernel(ssp, error_code);
638 else
639 stw_kernel(ssp, error_code);
640 ESP = (esp & mask) | (ESP & ~mask);
641 }
642 return;
643 case 6: /* 286 interrupt gate */
644 case 7: /* 286 trap gate */
645 case 14: /* 386 interrupt gate */
646 case 15: /* 386 trap gate */
647 break;
648 default:
649 raise_exception_err(EXCP0D_GPF, intno * 8 + 2);
650 break;
651 }
652 dpl = (e2 >> DESC_DPL_SHIFT) & 3;
653 cpl = env->hflags & HF_CPL_MASK;
654 /* check privledge if software int */
655 if (is_int && dpl < cpl)
656 raise_exception_err(EXCP0D_GPF, intno * 8 + 2);
657 /* check valid bit */
658 if (!(e2 & DESC_P_MASK))
659 raise_exception_err(EXCP0B_NOSEG, intno * 8 + 2);
660 selector = e1 >> 16;
661 offset = (e2 & 0xffff0000) | (e1 & 0x0000ffff);
662 if ((selector & 0xfffc) == 0)
663 raise_exception_err(EXCP0D_GPF, 0);
664
665 if (load_segment(&e1, &e2, selector) != 0)
666 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
667 if (!(e2 & DESC_S_MASK) || !(e2 & (DESC_CS_MASK)))
668 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
669 dpl = (e2 >> DESC_DPL_SHIFT) & 3;
670 if (dpl > cpl)
671 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
672 if (!(e2 & DESC_P_MASK))
673 raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc);
674 if (!(e2 & DESC_C_MASK) && dpl < cpl) {
675 /* to inner priviledge */
676 get_ss_esp_from_tss(&ss, &esp, dpl);
677 if ((ss & 0xfffc) == 0)
678 raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
679 if ((ss & 3) != dpl)
680 raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
681 if (load_segment(&ss_e1, &ss_e2, ss) != 0)
682 raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
683 ss_dpl = (ss_e2 >> DESC_DPL_SHIFT) & 3;
684 if (ss_dpl != dpl)
685 raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
686 if (!(ss_e2 & DESC_S_MASK) ||
687 (ss_e2 & DESC_CS_MASK) ||
688 !(ss_e2 & DESC_W_MASK))
689 raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
690 if (!(ss_e2 & DESC_P_MASK))
691 raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
692 new_stack = 1;
693 sp_mask = get_sp_mask(ss_e2);
694 ssp = get_seg_base(ss_e1, ss_e2);
695 } else if ((e2 & DESC_C_MASK) || dpl == cpl) {
696 /* to same priviledge */
697 if (env->eflags & VM_MASK)
698 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
699 new_stack = 0;
700 sp_mask = get_sp_mask(env->segs[R_SS].flags);
701 ssp = env->segs[R_SS].base;
702 esp = ESP;
703 dpl = cpl;
704 } else {
705 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
706 new_stack = 0; /* avoid warning */
707 sp_mask = 0; /* avoid warning */
708 ssp = 0; /* avoid warning */
709 esp = 0; /* avoid warning */
710 }
711
712 shift = type >> 3;
713
714 #if 0
715 /* XXX: check that enough room is available */
716 push_size = 6 + (new_stack << 2) + (has_error_code << 1);
717 if (env->eflags & VM_MASK)
718 push_size += 8;
719 push_size <<= shift;
720 #endif
721 if (shift == 1) {
722 if (new_stack) {
723 if (env->eflags & VM_MASK) {
724 PUSHL(ssp, esp, sp_mask, env->segs[R_GS].selector);
725 PUSHL(ssp, esp, sp_mask, env->segs[R_FS].selector);
726 PUSHL(ssp, esp, sp_mask, env->segs[R_DS].selector);
727 PUSHL(ssp, esp, sp_mask, env->segs[R_ES].selector);
728 }
729 PUSHL(ssp, esp, sp_mask, env->segs[R_SS].selector);
730 PUSHL(ssp, esp, sp_mask, ESP);
731 }
732 PUSHL(ssp, esp, sp_mask, compute_eflags());
733 PUSHL(ssp, esp, sp_mask, env->segs[R_CS].selector);
734 PUSHL(ssp, esp, sp_mask, old_eip);
735 if (has_error_code) {
736 PUSHL(ssp, esp, sp_mask, error_code);
737 }
738 } else {
739 if (new_stack) {
740 if (env->eflags & VM_MASK) {
741 PUSHW(ssp, esp, sp_mask, env->segs[R_GS].selector);
742 PUSHW(ssp, esp, sp_mask, env->segs[R_FS].selector);
743 PUSHW(ssp, esp, sp_mask, env->segs[R_DS].selector);
744 PUSHW(ssp, esp, sp_mask, env->segs[R_ES].selector);
745 }
746 PUSHW(ssp, esp, sp_mask, env->segs[R_SS].selector);
747 PUSHW(ssp, esp, sp_mask, ESP);
748 }
749 PUSHW(ssp, esp, sp_mask, compute_eflags());
750 PUSHW(ssp, esp, sp_mask, env->segs[R_CS].selector);
751 PUSHW(ssp, esp, sp_mask, old_eip);
752 if (has_error_code) {
753 PUSHW(ssp, esp, sp_mask, error_code);
754 }
755 }
756
757 if (new_stack) {
758 if (env->eflags & VM_MASK) {
759 cpu_x86_load_seg_cache(env, R_ES, 0, 0, 0, 0);
760 cpu_x86_load_seg_cache(env, R_DS, 0, 0, 0, 0);
761 cpu_x86_load_seg_cache(env, R_FS, 0, 0, 0, 0);
762 cpu_x86_load_seg_cache(env, R_GS, 0, 0, 0, 0);
763 }
764 ss = (ss & ~3) | dpl;
765 cpu_x86_load_seg_cache(env, R_SS, ss,
766 ssp, get_seg_limit(ss_e1, ss_e2), ss_e2);
767 }
768 ESP = (ESP & ~sp_mask) | (esp & sp_mask);
769
770 selector = (selector & ~3) | dpl;
771 cpu_x86_load_seg_cache(env, R_CS, selector,
772 get_seg_base(e1, e2),
773 get_seg_limit(e1, e2),
774 e2);
775 cpu_x86_set_cpl(env, dpl);
776 env->eip = offset;
777
778 /* interrupt gate clear IF mask */
779 if ((type & 1) == 0) {
780 env->eflags &= ~IF_MASK;
781 }
782 env->eflags &= ~(TF_MASK | VM_MASK | RF_MASK | NT_MASK);
783 }
784
785 #ifdef TARGET_X86_64
786
787 #define PUSHQ(sp, val)\
788 {\
789 sp -= 8;\
790 stq_kernel(sp, (val));\
791 }
792
793 #define POPQ(sp, val)\
794 {\
795 val = ldq_kernel(sp);\
796 sp += 8;\
797 }
798
799 static inline target_ulong get_rsp_from_tss(int level)
800 {
801 int index;
802
803 #if 0
804 printf("TR: base=" TARGET_FMT_lx " limit=%x\n",
805 env->tr.base, env->tr.limit);
806 #endif
807
808 if (!(env->tr.flags & DESC_P_MASK))
809 cpu_abort(env, "invalid tss");
810 index = 8 * level + 4;
811 if ((index + 7) > env->tr.limit)
812 raise_exception_err(EXCP0A_TSS, env->tr.selector & 0xfffc);
813 return ldq_kernel(env->tr.base + index);
814 }
815
816 /* 64 bit interrupt */
817 static void do_interrupt64(int intno, int is_int, int error_code,
818 target_ulong next_eip, int is_hw)
819 {
820 SegmentCache *dt;
821 target_ulong ptr;
822 int type, dpl, selector, cpl, ist;
823 int has_error_code, new_stack;
824 uint32_t e1, e2, e3, ss;
825 target_ulong old_eip, esp, offset;
826
827 has_error_code = 0;
828 if (!is_int && !is_hw) {
829 switch(intno) {
830 case 8:
831 case 10:
832 case 11:
833 case 12:
834 case 13:
835 case 14:
836 case 17:
837 has_error_code = 1;
838 break;
839 }
840 }
841 if (is_int)
842 old_eip = next_eip;
843 else
844 old_eip = env->eip;
845
846 dt = &env->idt;
847 if (intno * 16 + 15 > dt->limit)
848 raise_exception_err(EXCP0D_GPF, intno * 16 + 2);
849 ptr = dt->base + intno * 16;
850 e1 = ldl_kernel(ptr);
851 e2 = ldl_kernel(ptr + 4);
852 e3 = ldl_kernel(ptr + 8);
853 /* check gate type */
854 type = (e2 >> DESC_TYPE_SHIFT) & 0x1f;
855 switch(type) {
856 case 14: /* 386 interrupt gate */
857 case 15: /* 386 trap gate */
858 break;
859 default:
860 raise_exception_err(EXCP0D_GPF, intno * 16 + 2);
861 break;
862 }
863 dpl = (e2 >> DESC_DPL_SHIFT) & 3;
864 cpl = env->hflags & HF_CPL_MASK;
865 /* check privledge if software int */
866 if (is_int && dpl < cpl)
867 raise_exception_err(EXCP0D_GPF, intno * 16 + 2);
868 /* check valid bit */
869 if (!(e2 & DESC_P_MASK))
870 raise_exception_err(EXCP0B_NOSEG, intno * 16 + 2);
871 selector = e1 >> 16;
872 offset = ((target_ulong)e3 << 32) | (e2 & 0xffff0000) | (e1 & 0x0000ffff);
873 ist = e2 & 7;
874 if ((selector & 0xfffc) == 0)
875 raise_exception_err(EXCP0D_GPF, 0);
876
877 if (load_segment(&e1, &e2, selector) != 0)
878 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
879 if (!(e2 & DESC_S_MASK) || !(e2 & (DESC_CS_MASK)))
880 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
881 dpl = (e2 >> DESC_DPL_SHIFT) & 3;
882 if (dpl > cpl)
883 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
884 if (!(e2 & DESC_P_MASK))
885 raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc);
886 if (!(e2 & DESC_L_MASK) || (e2 & DESC_B_MASK))
887 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
888 if ((!(e2 & DESC_C_MASK) && dpl < cpl) || ist != 0) {
889 /* to inner priviledge */
890 if (ist != 0)
891 esp = get_rsp_from_tss(ist + 3);
892 else
893 esp = get_rsp_from_tss(dpl);
894 esp &= ~0xfLL; /* align stack */
895 ss = 0;
896 new_stack = 1;
897 } else if ((e2 & DESC_C_MASK) || dpl == cpl) {
898 /* to same priviledge */
899 if (env->eflags & VM_MASK)
900 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
901 new_stack = 0;
902 if (ist != 0)
903 esp = get_rsp_from_tss(ist + 3);
904 else
905 esp = ESP;
906 esp &= ~0xfLL; /* align stack */
907 dpl = cpl;
908 } else {
909 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
910 new_stack = 0; /* avoid warning */
911 esp = 0; /* avoid warning */
912 }
913
914 PUSHQ(esp, env->segs[R_SS].selector);
915 PUSHQ(esp, ESP);
916 PUSHQ(esp, compute_eflags());
917 PUSHQ(esp, env->segs[R_CS].selector);
918 PUSHQ(esp, old_eip);
919 if (has_error_code) {
920 PUSHQ(esp, error_code);
921 }
922
923 if (new_stack) {
924 ss = 0 | dpl;
925 cpu_x86_load_seg_cache(env, R_SS, ss, 0, 0, 0);
926 }
927 ESP = esp;
928
929 selector = (selector & ~3) | dpl;
930 cpu_x86_load_seg_cache(env, R_CS, selector,
931 get_seg_base(e1, e2),
932 get_seg_limit(e1, e2),
933 e2);
934 cpu_x86_set_cpl(env, dpl);
935 env->eip = offset;
936
937 /* interrupt gate clear IF mask */
938 if ((type & 1) == 0) {
939 env->eflags &= ~IF_MASK;
940 }
941 env->eflags &= ~(TF_MASK | VM_MASK | RF_MASK | NT_MASK);
942 }
943 #endif
944
945 void helper_syscall(int next_eip_addend)
946 {
947 int selector;
948
949 if (!(env->efer & MSR_EFER_SCE)) {
950 raise_exception_err(EXCP06_ILLOP, 0);
951 }
952 selector = (env->star >> 32) & 0xffff;
953 #ifdef TARGET_X86_64
954 if (env->hflags & HF_LMA_MASK) {
955 int code64;
956
957 ECX = env->eip + next_eip_addend;
958 env->regs[11] = compute_eflags();
959
960 code64 = env->hflags & HF_CS64_MASK;
961
962 cpu_x86_set_cpl(env, 0);
963 cpu_x86_load_seg_cache(env, R_CS, selector & 0xfffc,
964 0, 0xffffffff,
965 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK |
966 DESC_S_MASK |
967 DESC_CS_MASK | DESC_R_MASK | DESC_A_MASK | DESC_L_MASK);
968 cpu_x86_load_seg_cache(env, R_SS, (selector + 8) & 0xfffc,
969 0, 0xffffffff,
970 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK |
971 DESC_S_MASK |
972 DESC_W_MASK | DESC_A_MASK);
973 env->eflags &= ~env->fmask;
974 if (code64)
975 env->eip = env->lstar;
976 else
977 env->eip = env->cstar;
978 } else
979 #endif
980 {
981 ECX = (uint32_t)(env->eip + next_eip_addend);
982
983 cpu_x86_set_cpl(env, 0);
984 cpu_x86_load_seg_cache(env, R_CS, selector & 0xfffc,
985 0, 0xffffffff,
986 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK |
987 DESC_S_MASK |
988 DESC_CS_MASK | DESC_R_MASK | DESC_A_MASK);
989 cpu_x86_load_seg_cache(env, R_SS, (selector + 8) & 0xfffc,
990 0, 0xffffffff,
991 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK |
992 DESC_S_MASK |
993 DESC_W_MASK | DESC_A_MASK);
994 env->eflags &= ~(IF_MASK | RF_MASK | VM_MASK);
995 env->eip = (uint32_t)env->star;
996 }
997 }
998
999 void helper_sysret(int dflag)
1000 {
1001 int cpl, selector;
1002
1003 if (!(env->efer & MSR_EFER_SCE)) {
1004 raise_exception_err(EXCP06_ILLOP, 0);
1005 }
1006 cpl = env->hflags & HF_CPL_MASK;
1007 if (!(env->cr[0] & CR0_PE_MASK) || cpl != 0) {
1008 raise_exception_err(EXCP0D_GPF, 0);
1009 }
1010 selector = (env->star >> 48) & 0xffff;
1011 #ifdef TARGET_X86_64
1012 if (env->hflags & HF_LMA_MASK) {
1013 if (dflag == 2) {
1014 cpu_x86_load_seg_cache(env, R_CS, (selector + 16) | 3,
1015 0, 0xffffffff,
1016 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK |
1017 DESC_S_MASK | (3 << DESC_DPL_SHIFT) |
1018 DESC_CS_MASK | DESC_R_MASK | DESC_A_MASK |
1019 DESC_L_MASK);
1020 env->eip = ECX;
1021 } else {
1022 cpu_x86_load_seg_cache(env, R_CS, selector | 3,
1023 0, 0xffffffff,
1024 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK |
1025 DESC_S_MASK | (3 << DESC_DPL_SHIFT) |
1026 DESC_CS_MASK | DESC_R_MASK | DESC_A_MASK);
1027 env->eip = (uint32_t)ECX;
1028 }
1029 cpu_x86_load_seg_cache(env, R_SS, selector + 8,
1030 0, 0xffffffff,
1031 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK |
1032 DESC_S_MASK | (3 << DESC_DPL_SHIFT) |
1033 DESC_W_MASK | DESC_A_MASK);
1034 load_eflags((uint32_t)(env->regs[11]), TF_MASK | AC_MASK | ID_MASK |
1035 IF_MASK | IOPL_MASK | VM_MASK | RF_MASK | NT_MASK);
1036 cpu_x86_set_cpl(env, 3);
1037 } else
1038 #endif
1039 {
1040 cpu_x86_load_seg_cache(env, R_CS, selector | 3,
1041 0, 0xffffffff,
1042 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK |
1043 DESC_S_MASK | (3 << DESC_DPL_SHIFT) |
1044 DESC_CS_MASK | DESC_R_MASK | DESC_A_MASK);
1045 env->eip = (uint32_t)ECX;
1046 cpu_x86_load_seg_cache(env, R_SS, selector + 8,
1047 0, 0xffffffff,
1048 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK |
1049 DESC_S_MASK | (3 << DESC_DPL_SHIFT) |
1050 DESC_W_MASK | DESC_A_MASK);
1051 env->eflags |= IF_MASK;
1052 cpu_x86_set_cpl(env, 3);
1053 }
1054 #ifdef USE_KQEMU
1055 if (kqemu_is_ok(env)) {
1056 if (env->hflags & HF_LMA_MASK)
1057 CC_OP = CC_OP_EFLAGS;
1058 env->exception_index = -1;
1059 cpu_loop_exit();
1060 }
1061 #endif
1062 }
1063
1064 /* real mode interrupt */
1065 static void do_interrupt_real(int intno, int is_int, int error_code,
1066 unsigned int next_eip)
1067 {
1068 SegmentCache *dt;
1069 target_ulong ptr, ssp;
1070 int selector;
1071 uint32_t offset, esp;
1072 uint32_t old_cs, old_eip;
1073
1074 /* real mode (simpler !) */
1075 dt = &env->idt;
1076 if (intno * 4 + 3 > dt->limit)
1077 raise_exception_err(EXCP0D_GPF, intno * 8 + 2);
1078 ptr = dt->base + intno * 4;
1079 offset = lduw_kernel(ptr);
1080 selector = lduw_kernel(ptr + 2);
1081 esp = ESP;
1082 ssp = env->segs[R_SS].base;
1083 if (is_int)
1084 old_eip = next_eip;
1085 else
1086 old_eip = env->eip;
1087 old_cs = env->segs[R_CS].selector;
1088 /* XXX: use SS segment size ? */
1089 PUSHW(ssp, esp, 0xffff, compute_eflags());
1090 PUSHW(ssp, esp, 0xffff, old_cs);
1091 PUSHW(ssp, esp, 0xffff, old_eip);
1092
1093 /* update processor state */
1094 ESP = (ESP & ~0xffff) | (esp & 0xffff);
1095 env->eip = offset;
1096 env->segs[R_CS].selector = selector;
1097 env->segs[R_CS].base = (selector << 4);
1098 env->eflags &= ~(IF_MASK | TF_MASK | AC_MASK | RF_MASK);
1099 }
1100
1101 /* fake user mode interrupt */
1102 void do_interrupt_user(int intno, int is_int, int error_code,
1103 target_ulong next_eip)
1104 {
1105 SegmentCache *dt;
1106 target_ulong ptr;
1107 int dpl, cpl;
1108 uint32_t e2;
1109
1110 dt = &env->idt;
1111 ptr = dt->base + (intno * 8);
1112 e2 = ldl_kernel(ptr + 4);
1113
1114 dpl = (e2 >> DESC_DPL_SHIFT) & 3;
1115 cpl = env->hflags & HF_CPL_MASK;
1116 /* check privledge if software int */
1117 if (is_int && dpl < cpl)
1118 raise_exception_err(EXCP0D_GPF, intno * 8 + 2);
1119
1120 /* Since we emulate only user space, we cannot do more than
1121 exiting the emulation with the suitable exception and error
1122 code */
1123 if (is_int)
1124 EIP = next_eip;
1125 }
1126
1127 /*
1128 * Begin execution of an interruption. is_int is TRUE if coming from
1129 * the int instruction. next_eip is the EIP value AFTER the interrupt
1130 * instruction. It is only relevant if is_int is TRUE.
1131 */
1132 void do_interrupt(int intno, int is_int, int error_code,
1133 target_ulong next_eip, int is_hw)
1134 {
1135 if (loglevel & CPU_LOG_INT) {
1136 if ((env->cr[0] & CR0_PE_MASK)) {
1137 static int count;
1138 fprintf(logfile, "%6d: v=%02x e=%04x i=%d cpl=%d IP=%04x:" TARGET_FMT_lx " pc=" TARGET_FMT_lx " SP=%04x:" TARGET_FMT_lx,
1139 count, intno, error_code, is_int,
1140 env->hflags & HF_CPL_MASK,
1141 env->segs[R_CS].selector, EIP,
1142 (int)env->segs[R_CS].base + EIP,
1143 env->segs[R_SS].selector, ESP);
1144 if (intno == 0x0e) {
1145 fprintf(logfile, " CR2=" TARGET_FMT_lx, env->cr[2]);
1146 } else {
1147 fprintf(logfile, " EAX=" TARGET_FMT_lx, EAX);
1148 }
1149 fprintf(logfile, "\n");
1150 cpu_dump_state(env, logfile, fprintf, X86_DUMP_CCOP);
1151 #if 0
1152 {
1153 int i;
1154 uint8_t *ptr;
1155 fprintf(logfile, " code=");
1156 ptr = env->segs[R_CS].base + env->eip;
1157 for(i = 0; i < 16; i++) {
1158 fprintf(logfile, " %02x", ldub(ptr + i));
1159 }
1160 fprintf(logfile, "\n");
1161 }
1162 #endif
1163 count++;
1164 }
1165 }
1166 if (env->cr[0] & CR0_PE_MASK) {
1167 #if TARGET_X86_64
1168 if (env->hflags & HF_LMA_MASK) {
1169 do_interrupt64(intno, is_int, error_code, next_eip, is_hw);
1170 } else
1171 #endif
1172 {
1173 do_interrupt_protected(intno, is_int, error_code, next_eip, is_hw);
1174 }
1175 } else {
1176 do_interrupt_real(intno, is_int, error_code, next_eip);
1177 }
1178 }
1179
1180 /*
1181 * Signal an interruption. It is executed in the main CPU loop.
1182 * is_int is TRUE if coming from the int instruction. next_eip is the
1183 * EIP value AFTER the interrupt instruction. It is only relevant if
1184 * is_int is TRUE.
1185 */
1186 void raise_interrupt(int intno, int is_int, int error_code,
1187 int next_eip_addend)
1188 {
1189 env->exception_index = intno;
1190 env->error_code = error_code;
1191 env->exception_is_int = is_int;
1192 env->exception_next_eip = env->eip + next_eip_addend;
1193 cpu_loop_exit();
1194 }
1195
1196 /* same as raise_exception_err, but do not restore global registers */
1197 static void raise_exception_err_norestore(int exception_index, int error_code)
1198 {
1199 env->exception_index = exception_index;
1200 env->error_code = error_code;
1201 env->exception_is_int = 0;
1202 env->exception_next_eip = 0;
1203 longjmp(env->jmp_env, 1);
1204 }
1205
1206 /* shortcuts to generate exceptions */
1207
1208 void (raise_exception_err)(int exception_index, int error_code)
1209 {
1210 raise_interrupt(exception_index, 0, error_code, 0);
1211 }
1212
1213 void raise_exception(int exception_index)
1214 {
1215 raise_interrupt(exception_index, 0, 0, 0);
1216 }
1217
1218 #ifdef BUGGY_GCC_DIV64
1219 /* gcc 2.95.4 on PowerPC does not seem to like using __udivdi3, so we
1220 call it from another function */
1221 uint32_t div32(uint64_t *q_ptr, uint64_t num, uint32_t den)
1222 {
1223 *q_ptr = num / den;
1224 return num % den;
1225 }
1226
1227 int32_t idiv32(int64_t *q_ptr, int64_t num, int32_t den)
1228 {
1229 *q_ptr = num / den;
1230 return num % den;
1231 }
1232 #endif
1233
1234 void helper_divl_EAX_T0(void)
1235 {
1236 unsigned int den, r;
1237 uint64_t num, q;
1238
1239 num = ((uint32_t)EAX) | ((uint64_t)((uint32_t)EDX) << 32);
1240 den = T0;
1241 if (den == 0) {
1242 raise_exception(EXCP00_DIVZ);
1243 }
1244 #ifdef BUGGY_GCC_DIV64
1245 r = div32(&q, num, den);
1246 #else
1247 q = (num / den);
1248 r = (num % den);
1249 #endif
1250 if (q > 0xffffffff)
1251 raise_exception(EXCP00_DIVZ);
1252 EAX = (uint32_t)q;
1253 EDX = (uint32_t)r;
1254 }
1255
1256 void helper_idivl_EAX_T0(void)
1257 {
1258 int den, r;
1259 int64_t num, q;
1260
1261 num = ((uint32_t)EAX) | ((uint64_t)((uint32_t)EDX) << 32);
1262 den = T0;
1263 if (den == 0) {
1264 raise_exception(EXCP00_DIVZ);
1265 }
1266 #ifdef BUGGY_GCC_DIV64
1267 r = idiv32(&q, num, den);
1268 #else
1269 q = (num / den);
1270 r = (num % den);
1271 #endif
1272 if (q != (int32_t)q)
1273 raise_exception(EXCP00_DIVZ);
1274 EAX = (uint32_t)q;
1275 EDX = (uint32_t)r;
1276 }
1277
1278 void helper_cmpxchg8b(void)
1279 {
1280 uint64_t d;
1281 int eflags;
1282
1283 eflags = cc_table[CC_OP].compute_all();
1284 d = ldq(A0);
1285 if (d == (((uint64_t)EDX << 32) | EAX)) {
1286 stq(A0, ((uint64_t)ECX << 32) | EBX);
1287 eflags |= CC_Z;
1288 } else {
1289 EDX = d >> 32;
1290 EAX = d;
1291 eflags &= ~CC_Z;
1292 }
1293 CC_SRC = eflags;
1294 }
1295
1296 void helper_cpuid(void)
1297 {
1298 uint32_t index;
1299 index = (uint32_t)EAX;
1300
1301 /* test if maximum index reached */
1302 if (index & 0x80000000) {
1303 if (index > env->cpuid_xlevel)
1304 index = env->cpuid_level;
1305 } else {
1306 if (index > env->cpuid_level)
1307 index = env->cpuid_level;
1308 }
1309
1310 switch(index) {
1311 case 0:
1312 EAX = env->cpuid_level;
1313 EBX = env->cpuid_vendor1;
1314 EDX = env->cpuid_vendor2;
1315 ECX = env->cpuid_vendor3;
1316 break;
1317 case 1:
1318 EAX = env->cpuid_version;
1319 EBX = 8 << 8; /* CLFLUSH size in quad words, Linux wants it. */
1320 ECX = env->cpuid_ext_features;
1321 EDX = env->cpuid_features;
1322 break;
1323 case 2:
1324 /* cache info: needed for Pentium Pro compatibility */
1325 EAX = 0x410601;
1326 EBX = 0;
1327 ECX = 0;
1328 EDX = 0;
1329 break;
1330 case 0x80000000:
1331 EAX = env->cpuid_xlevel;
1332 EBX = env->cpuid_vendor1;
1333 EDX = env->cpuid_vendor2;
1334 ECX = env->cpuid_vendor3;
1335 break;
1336 case 0x80000001:
1337 EAX = env->cpuid_features;
1338 EBX = 0;
1339 ECX = 0;
1340 EDX = env->cpuid_ext2_features;
1341 break;
1342 case 0x80000002:
1343 case 0x80000003:
1344 case 0x80000004:
1345 EAX = env->cpuid_model[(index - 0x80000002) * 4 + 0];
1346 EBX = env->cpuid_model[(index - 0x80000002) * 4 + 1];
1347 ECX = env->cpuid_model[(index - 0x80000002) * 4 + 2];
1348 EDX = env->cpuid_model[(index - 0x80000002) * 4 + 3];
1349 break;
1350 case 0x80000005:
1351 /* cache info (L1 cache) */
1352 EAX = 0x01ff01ff;
1353 EBX = 0x01ff01ff;
1354 ECX = 0x40020140;
1355 EDX = 0x40020140;
1356 break;
1357 case 0x80000006:
1358 /* cache info (L2 cache) */
1359 EAX = 0;
1360 EBX = 0x42004200;
1361 ECX = 0x02008140;
1362 EDX = 0;
1363 break;
1364 case 0x80000008:
1365 /* virtual & phys address size in low 2 bytes. */
1366 EAX = 0x00003028;
1367 EBX = 0;
1368 ECX = 0;
1369 EDX = 0;
1370 break;
1371 default:
1372 /* reserved values: zero */
1373 EAX = 0;
1374 EBX = 0;
1375 ECX = 0;
1376 EDX = 0;
1377 break;
1378 }
1379 }
1380
1381 void helper_enter_level(int level, int data32)
1382 {
1383 target_ulong ssp;
1384 uint32_t esp_mask, esp, ebp;
1385
1386 esp_mask = get_sp_mask(env->segs[R_SS].flags);
1387 ssp = env->segs[R_SS].base;
1388 ebp = EBP;
1389 esp = ESP;
1390 if (data32) {
1391 /* 32 bit */
1392 esp -= 4;
1393 while (--level) {
1394 esp -= 4;
1395 ebp -= 4;
1396 stl(ssp + (esp & esp_mask), ldl(ssp + (ebp & esp_mask)));
1397 }
1398 esp -= 4;
1399 stl(ssp + (esp & esp_mask), T1);
1400 } else {
1401 /* 16 bit */
1402 esp -= 2;
1403 while (--level) {
1404 esp -= 2;
1405 ebp -= 2;
1406 stw(ssp + (esp & esp_mask), lduw(ssp + (ebp & esp_mask)));
1407 }
1408 esp -= 2;
1409 stw(ssp + (esp & esp_mask), T1);
1410 }
1411 }
1412
1413 #ifdef TARGET_X86_64
1414 void helper_enter64_level(int level, int data64)
1415 {
1416 target_ulong esp, ebp;
1417 ebp = EBP;
1418 esp = ESP;
1419
1420 if (data64) {
1421 /* 64 bit */
1422 esp -= 8;
1423 while (--level) {
1424 esp -= 8;
1425 ebp -= 8;
1426 stq(esp, ldq(ebp));
1427 }
1428 esp -= 8;
1429 stq(esp, T1);
1430 } else {
1431 /* 16 bit */
1432 esp -= 2;
1433 while (--level) {
1434 esp -= 2;
1435 ebp -= 2;
1436 stw(esp, lduw(ebp));
1437 }
1438 esp -= 2;
1439 stw(esp, T1);
1440 }
1441 }
1442 #endif
1443
1444 void helper_lldt_T0(void)
1445 {
1446 int selector;
1447 SegmentCache *dt;
1448 uint32_t e1, e2;
1449 int index, entry_limit;
1450 target_ulong ptr;
1451
1452 selector = T0 & 0xffff;
1453 if ((selector & 0xfffc) == 0) {
1454 /* XXX: NULL selector case: invalid LDT */
1455 env->ldt.base = 0;
1456 env->ldt.limit = 0;
1457 } else {
1458 if (selector & 0x4)
1459 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
1460 dt = &env->gdt;
1461 index = selector & ~7;
1462 #ifdef TARGET_X86_64
1463 if (env->hflags & HF_LMA_MASK)
1464 entry_limit = 15;
1465 else
1466 #endif
1467 entry_limit = 7;
1468 if ((index + entry_limit) > dt->limit)
1469 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
1470 ptr = dt->base + index;
1471 e1 = ldl_kernel(ptr);
1472 e2 = ldl_kernel(ptr + 4);
1473 if ((e2 & DESC_S_MASK) || ((e2 >> DESC_TYPE_SHIFT) & 0xf) != 2)
1474 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
1475 if (!(e2 & DESC_P_MASK))
1476 raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc);
1477 #ifdef TARGET_X86_64
1478 if (env->hflags & HF_LMA_MASK) {
1479 uint32_t e3;
1480 e3 = ldl_kernel(ptr + 8);
1481 load_seg_cache_raw_dt(&env->ldt, e1, e2);
1482 env->ldt.base |= (target_ulong)e3 << 32;
1483 } else
1484 #endif
1485 {
1486 load_seg_cache_raw_dt(&env->ldt, e1, e2);
1487 }
1488 }
1489 env->ldt.selector = selector;
1490 }
1491
1492 void helper_ltr_T0(void)
1493 {
1494 int selector;
1495 SegmentCache *dt;
1496 uint32_t e1, e2;
1497 int index, type, entry_limit;
1498 target_ulong ptr;
1499
1500 selector = T0 & 0xffff;
1501 if ((selector & 0xfffc) == 0) {
1502 /* NULL selector case: invalid TR */
1503 env->tr.base = 0;
1504 env->tr.limit = 0;
1505 env->tr.flags = 0;
1506 } else {
1507 if (selector & 0x4)
1508 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
1509 dt = &env->gdt;
1510 index = selector & ~7;
1511 #ifdef TARGET_X86_64
1512 if (env->hflags & HF_LMA_MASK)
1513 entry_limit = 15;
1514 else
1515 #endif
1516 entry_limit = 7;
1517 if ((index + entry_limit) > dt->limit)
1518 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
1519 ptr = dt->base + index;
1520 e1 = ldl_kernel(ptr);
1521 e2 = ldl_kernel(ptr + 4);
1522 type = (e2 >> DESC_TYPE_SHIFT) & 0xf;
1523 if ((e2 & DESC_S_MASK) ||
1524 (type != 1 && type != 9))
1525 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
1526 if (!(e2 & DESC_P_MASK))
1527 raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc);
1528 #ifdef TARGET_X86_64
1529 if (env->hflags & HF_LMA_MASK) {
1530 uint32_t e3;
1531 e3 = ldl_kernel(ptr + 8);
1532 load_seg_cache_raw_dt(&env->tr, e1, e2);
1533 env->tr.base |= (target_ulong)e3 << 32;
1534 } else
1535 #endif
1536 {
1537 load_seg_cache_raw_dt(&env->tr, e1, e2);
1538 }
1539 e2 |= DESC_TSS_BUSY_MASK;
1540 stl_kernel(ptr + 4, e2);
1541 }
1542 env->tr.selector = selector;
1543 }
1544
1545 /* only works if protected mode and not VM86. seg_reg must be != R_CS */
1546 void load_seg(int seg_reg, int selector)
1547 {
1548 uint32_t e1, e2;
1549 int cpl, dpl, rpl;
1550 SegmentCache *dt;
1551 int index;
1552 target_ulong ptr;
1553
1554 selector &= 0xffff;
1555 cpl = env->hflags & HF_CPL_MASK;
1556 if ((selector & 0xfffc) == 0) {
1557 /* null selector case */
1558 if (seg_reg == R_SS
1559 #ifdef TARGET_X86_64
1560 && (!(env->hflags & HF_CS64_MASK) || cpl == 3)
1561 #endif
1562 )
1563 raise_exception_err(EXCP0D_GPF, 0);
1564 cpu_x86_load_seg_cache(env, seg_reg, selector, 0, 0, 0);
1565 } else {
1566
1567 if (selector & 0x4)
1568 dt = &env->ldt;
1569 else
1570 dt = &env->gdt;
1571 index = selector & ~7;
1572 if ((index + 7) > dt->limit)
1573 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
1574 ptr = dt->base + index;
1575 e1 = ldl_kernel(ptr);
1576 e2 = ldl_kernel(ptr + 4);
1577
1578 if (!(e2 & DESC_S_MASK))
1579 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
1580 rpl = selector & 3;
1581 dpl = (e2 >> DESC_DPL_SHIFT) & 3;
1582 if (seg_reg == R_SS) {
1583 /* must be writable segment */
1584 if ((e2 & DESC_CS_MASK) || !(e2 & DESC_W_MASK))
1585 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
1586 if (rpl != cpl || dpl != cpl)
1587 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
1588 } else {
1589 /* must be readable segment */
1590 if ((e2 & (DESC_CS_MASK | DESC_R_MASK)) == DESC_CS_MASK)
1591 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
1592
1593 if (!(e2 & DESC_CS_MASK) || !(e2 & DESC_C_MASK)) {
1594 /* if not conforming code, test rights */
1595 if (dpl < cpl || dpl < rpl)
1596 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
1597 }
1598 }
1599
1600 if (!(e2 & DESC_P_MASK)) {
1601 if (seg_reg == R_SS)
1602 raise_exception_err(EXCP0C_STACK, selector & 0xfffc);
1603 else
1604 raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc);
1605 }
1606
1607 /* set the access bit if not already set */
1608 if (!(e2 & DESC_A_MASK)) {
1609 e2 |= DESC_A_MASK;
1610 stl_kernel(ptr + 4, e2);
1611 }
1612
1613 cpu_x86_load_seg_cache(env, seg_reg, selector,
1614 get_seg_base(e1, e2),
1615 get_seg_limit(e1, e2),
1616 e2);
1617 #if 0
1618 fprintf(logfile, "load_seg: sel=0x%04x base=0x%08lx limit=0x%08lx flags=%08x\n",
1619 selector, (unsigned long)sc->base, sc->limit, sc->flags);
1620 #endif
1621 }
1622 }
1623
1624 /* protected mode jump */
1625 void helper_ljmp_protected_T0_T1(int next_eip_addend)
1626 {
1627 int new_cs, gate_cs, type;
1628 uint32_t e1, e2, cpl, dpl, rpl, limit;
1629 target_ulong new_eip, next_eip;
1630
1631 new_cs = T0;
1632 new_eip = T1;
1633 if ((new_cs & 0xfffc) == 0)
1634 raise_exception_err(EXCP0D_GPF, 0);
1635 if (load_segment(&e1, &e2, new_cs) != 0)
1636 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
1637 cpl = env->hflags & HF_CPL_MASK;
1638 if (e2 & DESC_S_MASK) {
1639 if (!(e2 & DESC_CS_MASK))
1640 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
1641 dpl = (e2 >> DESC_DPL_SHIFT) & 3;
1642 if (e2 & DESC_C_MASK) {
1643 /* conforming code segment */
1644 if (dpl > cpl)
1645 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
1646 } else {
1647 /* non conforming code segment */
1648 rpl = new_cs & 3;
1649 if (rpl > cpl)
1650 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
1651 if (dpl != cpl)
1652 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
1653 }
1654 if (!(e2 & DESC_P_MASK))
1655 raise_exception_err(EXCP0B_NOSEG, new_cs & 0xfffc);
1656 limit = get_seg_limit(e1, e2);
1657 if (new_eip > limit &&
1658 !(env->hflags & HF_LMA_MASK) && !(e2 & DESC_L_MASK))
1659 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
1660 cpu_x86_load_seg_cache(env, R_CS, (new_cs & 0xfffc) | cpl,
1661 get_seg_base(e1, e2), limit, e2);
1662 EIP = new_eip;
1663 } else {
1664 /* jump to call or task gate */
1665 dpl = (e2 >> DESC_DPL_SHIFT) & 3;
1666 rpl = new_cs & 3;
1667 cpl = env->hflags & HF_CPL_MASK;
1668 type = (e2 >> DESC_TYPE_SHIFT) & 0xf;
1669 switch(type) {
1670 case 1: /* 286 TSS */
1671 case 9: /* 386 TSS */
1672 case 5: /* task gate */
1673 if (dpl < cpl || dpl < rpl)
1674 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
1675 next_eip = env->eip + next_eip_addend;
1676 switch_tss(new_cs, e1, e2, SWITCH_TSS_JMP, next_eip);
1677 CC_OP = CC_OP_EFLAGS;
1678 break;
1679 case 4: /* 286 call gate */
1680 case 12: /* 386 call gate */
1681 if ((dpl < cpl) || (dpl < rpl))
1682 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
1683 if (!(e2 & DESC_P_MASK))
1684 raise_exception_err(EXCP0B_NOSEG, new_cs & 0xfffc);
1685 gate_cs = e1 >> 16;
1686 new_eip = (e1 & 0xffff);
1687 if (type == 12)
1688 new_eip |= (e2 & 0xffff0000);
1689 if (load_segment(&e1, &e2, gate_cs) != 0)
1690 raise_exception_err(EXCP0D_GPF, gate_cs & 0xfffc);
1691 dpl = (e2 >> DESC_DPL_SHIFT) & 3;
1692 /* must be code segment */
1693 if (((e2 & (DESC_S_MASK | DESC_CS_MASK)) !=
1694 (DESC_S_MASK | DESC_CS_MASK)))
1695 raise_exception_err(EXCP0D_GPF, gate_cs & 0xfffc);
1696 if (((e2 & DESC_C_MASK) && (dpl > cpl)) ||
1697 (!(e2 & DESC_C_MASK) && (dpl != cpl)))
1698 raise_exception_err(EXCP0D_GPF, gate_cs & 0xfffc);
1699 if (!(e2 & DESC_P_MASK))
1700 raise_exception_err(EXCP0D_GPF, gate_cs & 0xfffc);
1701 limit = get_seg_limit(e1, e2);
1702 if (new_eip > limit)
1703 raise_exception_err(EXCP0D_GPF, 0);
1704 cpu_x86_load_seg_cache(env, R_CS, (gate_cs & 0xfffc) | cpl,
1705 get_seg_base(e1, e2), limit, e2);
1706 EIP = new_eip;
1707 break;
1708 default:
1709 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
1710 break;
1711 }
1712 }
1713 }
1714
1715 /* real mode call */
1716 void helper_lcall_real_T0_T1(int shift, int next_eip)
1717 {
1718 int new_cs, new_eip;
1719 uint32_t esp, esp_mask;
1720 target_ulong ssp;
1721
1722 new_cs = T0;
1723 new_eip = T1;
1724 esp = ESP;
1725 esp_mask = get_sp_mask(env->segs[R_SS].flags);
1726 ssp = env->segs[R_SS].base;
1727 if (shift) {
1728 PUSHL(ssp, esp, esp_mask, env->segs[R_CS].selector);
1729 PUSHL(ssp, esp, esp_mask, next_eip);
1730 } else {
1731 PUSHW(ssp, esp, esp_mask, env->segs[R_CS].selector);
1732 PUSHW(ssp, esp, esp_mask, next_eip);
1733 }
1734
1735 ESP = (ESP & ~esp_mask) | (esp & esp_mask);
1736 env->eip = new_eip;
1737 env->segs[R_CS].selector = new_cs;
1738 env->segs[R_CS].base = (new_cs << 4);
1739 }
1740
1741 /* protected mode call */
1742 void helper_lcall_protected_T0_T1(int shift, int next_eip_addend)
1743 {
1744 int new_cs, new_stack, i;
1745 uint32_t e1, e2, cpl, dpl, rpl, selector, offset, param_count;
1746 uint32_t ss, ss_e1, ss_e2, sp, type, ss_dpl, sp_mask;
1747 uint32_t val, limit, old_sp_mask;
1748 target_ulong ssp, old_ssp, next_eip, new_eip;
1749
1750 new_cs = T0;
1751 new_eip = T1;
1752 next_eip = env->eip + next_eip_addend;
1753 #ifdef DEBUG_PCALL
1754 if (loglevel & CPU_LOG_PCALL) {
1755 fprintf(logfile, "lcall %04x:%08x s=%d\n",
1756 new_cs, (uint32_t)new_eip, shift);
1757 cpu_dump_state(env, logfile, fprintf, X86_DUMP_CCOP);
1758 }
1759 #endif
1760 if ((new_cs & 0xfffc) == 0)
1761 raise_exception_err(EXCP0D_GPF, 0);
1762 if (load_segment(&e1, &e2, new_cs) != 0)
1763 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
1764 cpl = env->hflags & HF_CPL_MASK;
1765 #ifdef DEBUG_PCALL
1766 if (loglevel & CPU_LOG_PCALL) {
1767 fprintf(logfile, "desc=%08x:%08x\n", e1, e2);
1768 }
1769 #endif
1770 if (e2 & DESC_S_MASK) {
1771 if (!(e2 & DESC_CS_MASK))
1772 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
1773 dpl = (e2 >> DESC_DPL_SHIFT) & 3;
1774 if (e2 & DESC_C_MASK) {
1775 /* conforming code segment */
1776 if (dpl > cpl)
1777 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
1778 } else {
1779 /* non conforming code segment */
1780 rpl = new_cs & 3;
1781 if (rpl > cpl)
1782 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
1783 if (dpl != cpl)
1784 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
1785 }
1786 if (!(e2 & DESC_P_MASK))
1787 raise_exception_err(EXCP0B_NOSEG, new_cs & 0xfffc);
1788
1789 #ifdef TARGET_X86_64
1790 /* XXX: check 16/32 bit cases in long mode */
1791 if (shift == 2) {
1792 target_ulong rsp;
1793 /* 64 bit case */
1794 rsp = ESP;
1795 PUSHQ(rsp, env->segs[R_CS].selector);
1796 PUSHQ(rsp, next_eip);
1797 /* from this point, not restartable */
1798 ESP = rsp;
1799 cpu_x86_load_seg_cache(env, R_CS, (new_cs & 0xfffc) | cpl,
1800 get_seg_base(e1, e2),
1801 get_seg_limit(e1, e2), e2);
1802 EIP = new_eip;
1803 } else
1804 #endif
1805 {
1806 sp = ESP;
1807 sp_mask = get_sp_mask(env->segs[R_SS].flags);
1808 ssp = env->segs[R_SS].base;
1809 if (shift) {
1810 PUSHL(ssp, sp, sp_mask, env->segs[R_CS].selector);
1811 PUSHL(ssp, sp, sp_mask, next_eip);
1812 } else {
1813 PUSHW(ssp, sp, sp_mask, env->segs[R_CS].selector);
1814 PUSHW(ssp, sp, sp_mask, next_eip);
1815 }
1816
1817 limit = get_seg_limit(e1, e2);
1818 if (new_eip > limit)
1819 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
1820 /* from this point, not restartable */
1821 ESP = (ESP & ~sp_mask) | (sp & sp_mask);
1822 cpu_x86_load_seg_cache(env, R_CS, (new_cs & 0xfffc) | cpl,
1823 get_seg_base(e1, e2), limit, e2);
1824 EIP = new_eip;
1825 }
1826 } else {
1827 /* check gate type */
1828 type = (e2 >> DESC_TYPE_SHIFT) & 0x1f;
1829 dpl = (e2 >> DESC_DPL_SHIFT) & 3;
1830 rpl = new_cs & 3;
1831 switch(type) {
1832 case 1: /* available 286 TSS */
1833 case 9: /* available 386 TSS */
1834 case 5: /* task gate */
1835 if (dpl < cpl || dpl < rpl)
1836 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
1837 switch_tss(new_cs, e1, e2, SWITCH_TSS_CALL, next_eip);
1838 CC_OP = CC_OP_EFLAGS;
1839 return;
1840 case 4: /* 286 call gate */
1841 case 12: /* 386 call gate */
1842 break;
1843 default:
1844 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
1845 break;
1846 }
1847 shift = type >> 3;
1848
1849 if (dpl < cpl || dpl < rpl)
1850 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
1851 /* check valid bit */
1852 if (!(e2 & DESC_P_MASK))
1853 raise_exception_err(EXCP0B_NOSEG, new_cs & 0xfffc);
1854 selector = e1 >> 16;
1855 offset = (e2 & 0xffff0000) | (e1 & 0x0000ffff);
1856 param_count = e2 & 0x1f;
1857 if ((selector & 0xfffc) == 0)
1858 raise_exception_err(EXCP0D_GPF, 0);
1859
1860 if (load_segment(&e1, &e2, selector) != 0)
1861 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
1862 if (!(e2 & DESC_S_MASK) || !(e2 & (DESC_CS_MASK)))
1863 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
1864 dpl = (e2 >> DESC_DPL_SHIFT) & 3;
1865 if (dpl > cpl)
1866 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
1867 if (!(e2 & DESC_P_MASK))
1868 raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc);
1869
1870 if (!(e2 & DESC_C_MASK) && dpl < cpl) {
1871 /* to inner priviledge */
1872 get_ss_esp_from_tss(&ss, &sp, dpl);
1873 #ifdef DEBUG_PCALL
1874 if (loglevel & CPU_LOG_PCALL)
1875 fprintf(logfile, "new ss:esp=%04x:%08x param_count=%d ESP=" TARGET_FMT_lx "\n",
1876 ss, sp, param_count, ESP);
1877 #endif
1878 if ((ss & 0xfffc) == 0)
1879 raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
1880 if ((ss & 3) != dpl)
1881 raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
1882 if (load_segment(&ss_e1, &ss_e2, ss) != 0)
1883 raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
1884 ss_dpl = (ss_e2 >> DESC_DPL_SHIFT) & 3;
1885 if (ss_dpl != dpl)
1886 raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
1887 if (!(ss_e2 & DESC_S_MASK) ||
1888 (ss_e2 & DESC_CS_MASK) ||
1889 !(ss_e2 & DESC_W_MASK))
1890 raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
1891 if (!(ss_e2 & DESC_P_MASK))
1892 raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
1893
1894 // push_size = ((param_count * 2) + 8) << shift;
1895
1896 old_sp_mask = get_sp_mask(env->segs[R_SS].flags);
1897 old_ssp = env->segs[R_SS].base;
1898
1899 sp_mask = get_sp_mask(ss_e2);
1900 ssp = get_seg_base(ss_e1, ss_e2);
1901 if (shift) {
1902 PUSHL(ssp, sp, sp_mask, env->segs[R_SS].selector);
1903 PUSHL(ssp, sp, sp_mask, ESP);
1904 for(i = param_count - 1; i >= 0; i--) {
1905 val = ldl_kernel(old_ssp + ((ESP + i * 4) & old_sp_mask));
1906 PUSHL(ssp, sp, sp_mask, val);
1907 }
1908 } else {
1909 PUSHW(ssp, sp, sp_mask, env->segs[R_SS].selector);
1910 PUSHW(ssp, sp, sp_mask, ESP);
1911 for(i = param_count - 1; i >= 0; i--) {
1912 val = lduw_kernel(old_ssp + ((ESP + i * 2) & old_sp_mask));
1913 PUSHW(ssp, sp, sp_mask, val);
1914 }
1915 }
1916 new_stack = 1;
1917 } else {
1918 /* to same priviledge */
1919 sp = ESP;
1920 sp_mask = get_sp_mask(env->segs[R_SS].flags);
1921 ssp = env->segs[R_SS].base;
1922 // push_size = (4 << shift);
1923 new_stack = 0;
1924 }
1925
1926 if (shift) {
1927 PUSHL(ssp, sp, sp_mask, env->segs[R_CS].selector);
1928 PUSHL(ssp, sp, sp_mask, next_eip);
1929 } else {
1930 PUSHW(ssp, sp, sp_mask, env->segs[R_CS].selector);
1931 PUSHW(ssp, sp, sp_mask, next_eip);
1932 }
1933
1934 /* from this point, not restartable */
1935
1936 if (new_stack) {
1937 ss = (ss & ~3) | dpl;
1938 cpu_x86_load_seg_cache(env, R_SS, ss,
1939 ssp,
1940 get_seg_limit(ss_e1, ss_e2),
1941 ss_e2);
1942 }
1943
1944 selector = (selector & ~3) | dpl;
1945 cpu_x86_load_seg_cache(env, R_CS, selector,
1946 get_seg_base(e1, e2),
1947 get_seg_limit(e1, e2),
1948 e2);
1949 cpu_x86_set_cpl(env, dpl);
1950 ESP = (ESP & ~sp_mask) | (sp & sp_mask);
1951 EIP = offset;
1952 }
1953 #ifdef USE_KQEMU
1954 if (kqemu_is_ok(env)) {
1955 env->exception_index = -1;
1956 cpu_loop_exit();
1957 }
1958 #endif
1959 }
1960
1961 /* real and vm86 mode iret */
1962 void helper_iret_real(int shift)
1963 {
1964 uint32_t sp, new_cs, new_eip, new_eflags, sp_mask;
1965 target_ulong ssp;
1966 int eflags_mask;
1967
1968 sp_mask = 0xffff; /* XXXX: use SS segment size ? */
1969 sp = ESP;
1970 ssp = env->segs[R_SS].base;
1971 if (shift == 1) {
1972 /* 32 bits */
1973 POPL(ssp, sp, sp_mask, new_eip);
1974 POPL(ssp, sp, sp_mask, new_cs);
1975 new_cs &= 0xffff;
1976 POPL(ssp, sp, sp_mask, new_eflags);
1977 } else {
1978 /* 16 bits */
1979 POPW(ssp, sp, sp_mask, new_eip);
1980 POPW(ssp, sp, sp_mask, new_cs);
1981 POPW(ssp, sp, sp_mask, new_eflags);
1982 }
1983 ESP = (ESP & ~sp_mask) | (sp & sp_mask);
1984 load_seg_vm(R_CS, new_cs);
1985 env->eip = new_eip;
1986 if (env->eflags & VM_MASK)
1987 eflags_mask = TF_MASK | AC_MASK | ID_MASK | IF_MASK | RF_MASK | NT_MASK;
1988 else
1989 eflags_mask = TF_MASK | AC_MASK | ID_MASK | IF_MASK | IOPL_MASK | RF_MASK | NT_MASK;
1990 if (shift == 0)
1991 eflags_mask &= 0xffff;
1992 load_eflags(new_eflags, eflags_mask);
1993 }
1994
1995 static inline void validate_seg(int seg_reg, int cpl)
1996 {
1997 int dpl;
1998 uint32_t e2;
1999
2000 /* XXX: on x86_64, we do not want to nullify FS and GS because
2001 they may still contain a valid base. I would be interested to
2002 know how a real x86_64 CPU behaves */
2003 if ((seg_reg == R_FS || seg_reg == R_GS) &&
2004 (env->segs[seg_reg].selector & 0xfffc) == 0)
2005 return;
2006
2007 e2 = env->segs[seg_reg].flags;
2008 dpl = (e2 >> DESC_DPL_SHIFT) & 3;
2009 if (!(e2 & DESC_CS_MASK) || !(e2 & DESC_C_MASK)) {
2010 /* data or non conforming code segment */
2011 if (dpl < cpl) {
2012 cpu_x86_load_seg_cache(env, seg_reg, 0, 0, 0, 0);
2013 }
2014 }
2015 }
2016
2017 /* protected mode iret */
2018 static inline void helper_ret_protected(int shift, int is_iret, int addend)
2019 {
2020 uint32_t new_cs, new_eflags, new_ss;
2021 uint32_t new_es, new_ds, new_fs, new_gs;
2022 uint32_t e1, e2, ss_e1, ss_e2;
2023 int cpl, dpl, rpl, eflags_mask, iopl;
2024 target_ulong ssp, sp, new_eip, new_esp, sp_mask;
2025
2026 #ifdef TARGET_X86_64
2027 if (shift == 2)
2028 sp_mask = -1;
2029 else
2030 #endif
2031 sp_mask = get_sp_mask(env->segs[R_SS].flags);
2032 sp = ESP;
2033 ssp = env->segs[R_SS].base;
2034 new_eflags = 0; /* avoid warning */
2035 #ifdef TARGET_X86_64
2036 if (shift == 2) {
2037 POPQ(sp, new_eip);
2038 POPQ(sp, new_cs);
2039 new_cs &= 0xffff;
2040 if (is_iret) {
2041 POPQ(sp, new_eflags);
2042 }
2043 } else
2044 #endif
2045 if (shift == 1) {
2046 /* 32 bits */
2047 POPL(ssp, sp, sp_mask, new_eip);
2048 POPL(ssp, sp, sp_mask, new_cs);
2049 new_cs &= 0xffff;
2050 if (is_iret) {
2051 POPL(ssp, sp, sp_mask, new_eflags);
2052 if (new_eflags & VM_MASK)
2053 goto return_to_vm86;
2054 }
2055 } else {
2056 /* 16 bits */
2057 POPW(ssp, sp, sp_mask, new_eip);
2058 POPW(ssp, sp, sp_mask, new_cs);
2059 if (is_iret)
2060 POPW(ssp, sp, sp_mask, new_eflags);
2061 }
2062 #ifdef DEBUG_PCALL
2063 if (loglevel & CPU_LOG_PCALL) {
2064 fprintf(logfile, "lret new %04x:" TARGET_FMT_lx " s=%d addend=0x%x\n",
2065 new_cs, new_eip, shift, addend);
2066 cpu_dump_state(env, logfile, fprintf, X86_DUMP_CCOP);
2067 }
2068 #endif
2069 if ((new_cs & 0xfffc) == 0)
2070 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
2071 if (load_segment(&e1, &e2, new_cs) != 0)
2072 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
2073 if (!(e2 & DESC_S_MASK) ||
2074 !(e2 & DESC_CS_MASK))
2075 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
2076 cpl = env->hflags & HF_CPL_MASK;
2077 rpl = new_cs & 3;
2078 if (rpl < cpl)
2079 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
2080 dpl = (e2 >> DESC_DPL_SHIFT) & 3;
2081 if (e2 & DESC_C_MASK) {
2082 if (dpl > rpl)
2083 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
2084 } else {
2085 if (dpl != rpl)
2086 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
2087 }
2088 if (!(e2 & DESC_P_MASK))
2089 raise_exception_err(EXCP0B_NOSEG, new_cs & 0xfffc);
2090
2091 sp += addend;
2092 if (rpl == cpl && (!(env->hflags & HF_CS64_MASK) ||
2093 ((env->hflags & HF_CS64_MASK) && !is_iret))) {
2094 /* return to same priledge level */
2095 cpu_x86_load_seg_cache(env, R_CS, new_cs,
2096 get_seg_base(e1, e2),
2097 get_seg_limit(e1, e2),
2098 e2);
2099 } else {
2100 /* return to different priviledge level */
2101 #ifdef TARGET_X86_64
2102 if (shift == 2) {
2103 POPQ(sp, new_esp);
2104 POPQ(sp, new_ss);
2105 new_ss &= 0xffff;
2106 } else
2107 #endif
2108 if (shift == 1) {
2109 /* 32 bits */
2110 POPL(ssp, sp, sp_mask, new_esp);
2111 POPL(ssp, sp, sp_mask, new_ss);
2112 new_ss &= 0xffff;
2113 } else {
2114 /* 16 bits */
2115 POPW(ssp, sp, sp_mask, new_esp);
2116 POPW(ssp, sp, sp_mask, new_ss);
2117 }
2118 #ifdef DEBUG_PCALL
2119 if (loglevel & CPU_LOG_PCALL) {
2120 fprintf(logfile, "new ss:esp=%04x:" TARGET_FMT_lx "\n",
2121 new_ss, new_esp);
2122 }
2123 #endif
2124 if ((new_ss & 0xfffc) == 0) {
2125 #ifdef TARGET_X86_64
2126 /* NULL ss is allowed in long mode if cpl != 3*/
2127 if ((env->hflags & HF_LMA_MASK) && rpl != 3) {
2128 cpu_x86_load_seg_cache(env, R_SS, new_ss,
2129 0, 0xffffffff,
2130 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK |
2131 DESC_S_MASK | (rpl << DESC_DPL_SHIFT) |
2132 DESC_W_MASK | DESC_A_MASK);
2133 } else
2134 #endif
2135 {
2136 raise_exception_err(EXCP0D_GPF, 0);
2137 }
2138 } else {
2139 if ((new_ss & 3) != rpl)
2140 raise_exception_err(EXCP0D_GPF, new_ss & 0xfffc);
2141 if (load_segment(&ss_e1, &ss_e2, new_ss) != 0)
2142 raise_exception_err(EXCP0D_GPF, new_ss & 0xfffc);
2143 if (!(ss_e2 & DESC_S_MASK) ||
2144 (ss_e2 & DESC_CS_MASK) ||
2145 !(ss_e2 & DESC_W_MASK))
2146 raise_exception_err(EXCP0D_GPF, new_ss & 0xfffc);
2147 dpl = (ss_e2 >> DESC_DPL_SHIFT) & 3;
2148 if (dpl != rpl)
2149 raise_exception_err(EXCP0D_GPF, new_ss & 0xfffc);
2150 if (!(ss_e2 & DESC_P_MASK))
2151 raise_exception_err(EXCP0B_NOSEG, new_ss & 0xfffc);
2152 cpu_x86_load_seg_cache(env, R_SS, new_ss,
2153 get_seg_base(ss_e1, ss_e2),
2154 get_seg_limit(ss_e1, ss_e2),
2155 ss_e2);
2156 }
2157
2158 cpu_x86_load_seg_cache(env, R_CS, new_cs,
2159 get_seg_base(e1, e2),
2160 get_seg_limit(e1, e2),
2161 e2);
2162 cpu_x86_set_cpl(env, rpl);
2163 sp = new_esp;
2164 #ifdef TARGET_X86_64
2165 if (env->hflags & HF_CS64_MASK)
2166 sp_mask = -1;
2167 else
2168 #endif
2169 sp_mask = get_sp_mask(ss_e2);
2170
2171 /* validate data segments */
2172 validate_seg(R_ES, rpl);
2173 validate_seg(R_DS, rpl);
2174 validate_seg(R_FS, rpl);
2175 validate_seg(R_GS, rpl);
2176
2177 sp += addend;
2178 }
2179 ESP = (ESP & ~sp_mask) | (sp & sp_mask);
2180 env->eip = new_eip;
2181 if (is_iret) {
2182 /* NOTE: 'cpl' is the _old_ CPL */
2183 eflags_mask = TF_MASK | AC_MASK | ID_MASK | RF_MASK | NT_MASK;
2184 if (cpl == 0)
2185 eflags_mask |= IOPL_MASK;
2186 iopl = (env->eflags >> IOPL_SHIFT) & 3;
2187 if (cpl <= iopl)
2188 eflags_mask |= IF_MASK;
2189 if (shift == 0)
2190 eflags_mask &= 0xffff;
2191 load_eflags(new_eflags, eflags_mask);
2192 }
2193 return;
2194
2195 return_to_vm86:
2196 POPL(ssp, sp, sp_mask, new_esp);
2197 POPL(ssp, sp, sp_mask, new_ss);
2198 POPL(ssp, sp, sp_mask, new_es);
2199 POPL(ssp, sp, sp_mask, new_ds);
2200 POPL(ssp, sp, sp_mask, new_fs);
2201 POPL(ssp, sp, sp_mask, new_gs);
2202
2203 /* modify processor state */
2204 load_eflags(new_eflags, TF_MASK | AC_MASK | ID_MASK |
2205 IF_MASK | IOPL_MASK | VM_MASK | NT_MASK | VIF_MASK | VIP_MASK);
2206 load_seg_vm(R_CS, new_cs & 0xffff);
2207 cpu_x86_set_cpl(env, 3);
2208 load_seg_vm(R_SS, new_ss & 0xffff);
2209 load_seg_vm(R_ES, new_es & 0xffff);
2210 load_seg_vm(R_DS, new_ds & 0xffff);
2211 load_seg_vm(R_FS, new_fs & 0xffff);
2212 load_seg_vm(R_GS, new_gs & 0xffff);
2213
2214 env->eip = new_eip & 0xffff;
2215 ESP = new_esp;
2216 }
2217
2218 void helper_iret_protected(int shift, int next_eip)
2219 {
2220 int tss_selector, type;
2221 uint32_t e1, e2;
2222
2223 /* specific case for TSS */
2224 if (env->eflags & NT_MASK) {
2225 #ifdef TARGET_X86_64
2226 if (env->hflags & HF_LMA_MASK)
2227 raise_exception_err(EXCP0D_GPF, 0);
2228 #endif
2229 tss_selector = lduw_kernel(env->tr.base + 0);
2230 if (tss_selector & 4)
2231 raise_exception_err(EXCP0A_TSS, tss_selector & 0xfffc);
2232 if (load_segment(&e1, &e2, tss_selector) != 0)
2233 raise_exception_err(EXCP0A_TSS, tss_selector & 0xfffc);
2234 type = (e2 >> DESC_TYPE_SHIFT) & 0x17;
2235 /* NOTE: we check both segment and busy TSS */
2236 if (type != 3)
2237 raise_exception_err(EXCP0A_TSS, tss_selector & 0xfffc);
2238 switch_tss(tss_selector, e1, e2, SWITCH_TSS_IRET, next_eip);
2239 } else {
2240 helper_ret_protected(shift, 1, 0);
2241 }
2242 #ifdef USE_KQEMU
2243 if (kqemu_is_ok(env)) {
2244 CC_OP = CC_OP_EFLAGS;
2245 env->exception_index = -1;
2246 cpu_loop_exit();
2247 }
2248 #endif
2249 }
2250
2251 void helper_lret_protected(int shift, int addend)
2252 {
2253 helper_ret_protected(shift, 0, addend);
2254 #ifdef USE_KQEMU
2255 if (kqemu_is_ok(env)) {
2256 env->exception_index = -1;
2257 cpu_loop_exit();
2258 }
2259 #endif
2260 }
2261
2262 void helper_sysenter(void)
2263 {
2264 if (env->sysenter_cs == 0) {
2265 raise_exception_err(EXCP0D_GPF, 0);
2266 }
2267 env->eflags &= ~(VM_MASK | IF_MASK | RF_MASK);
2268 cpu_x86_set_cpl(env, 0);
2269 cpu_x86_load_seg_cache(env, R_CS, env->sysenter_cs & 0xfffc,
2270 0, 0xffffffff,
2271 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK |
2272 DESC_S_MASK |
2273 DESC_CS_MASK | DESC_R_MASK | DESC_A_MASK);
2274 cpu_x86_load_seg_cache(env, R_SS, (env->sysenter_cs + 8) & 0xfffc,
2275 0, 0xffffffff,
2276 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK |
2277 DESC_S_MASK |
2278 DESC_W_MASK | DESC_A_MASK);
2279 ESP = env->sysenter_esp;
2280 EIP = env->sysenter_eip;
2281 }
2282
2283 void helper_sysexit(void)
2284 {
2285 int cpl;
2286
2287 cpl = env->hflags & HF_CPL_MASK;
2288 if (env->sysenter_cs == 0 || cpl != 0) {
2289 raise_exception_err(EXCP0D_GPF, 0);
2290 }
2291 cpu_x86_set_cpl(env, 3);
2292 cpu_x86_load_seg_cache(env, R_CS, ((env->sysenter_cs + 16) & 0xfffc) | 3,
2293 0, 0xffffffff,
2294 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK |
2295 DESC_S_MASK | (3 << DESC_DPL_SHIFT) |
2296 DESC_CS_MASK | DESC_R_MASK | DESC_A_MASK);
2297 cpu_x86_load_seg_cache(env, R_SS, ((env->sysenter_cs + 24) & 0xfffc) | 3,
2298 0, 0xffffffff,
2299 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK |
2300 DESC_S_MASK | (3 << DESC_DPL_SHIFT) |
2301 DESC_W_MASK | DESC_A_MASK);
2302 ESP = ECX;
2303 EIP = EDX;
2304 #ifdef USE_KQEMU
2305 if (kqemu_is_ok(env)) {
2306 env->exception_index = -1;
2307 cpu_loop_exit();
2308 }
2309 #endif
2310 }
2311
2312 void helper_movl_crN_T0(int reg)
2313 {
2314 #if !defined(CONFIG_USER_ONLY)
2315 switch(reg) {
2316 case 0:
2317 cpu_x86_update_cr0(env, T0);
2318 break;
2319 case 3:
2320 cpu_x86_update_cr3(env, T0);
2321 break;
2322 case 4:
2323 cpu_x86_update_cr4(env, T0);
2324 break;
2325 case 8:
2326 cpu_set_apic_tpr(env, T0);
2327 break;
2328 default:
2329 env->cr[reg] = T0;
2330 break;
2331 }
2332 #endif
2333 }
2334
2335 /* XXX: do more */
2336 void helper_movl_drN_T0(int reg)
2337 {
2338 env->dr[reg] = T0;
2339 }
2340
2341 void helper_invlpg(target_ulong addr)
2342 {
2343 cpu_x86_flush_tlb(env, addr);
2344 }
2345
2346 void helper_rdtsc(void)
2347 {
2348 uint64_t val;
2349
2350 if ((env->cr[4] & CR4_TSD_MASK) && ((env->hflags & HF_CPL_MASK) != 0)) {
2351 raise_exception(EXCP0D_GPF);
2352 }
2353 val = cpu_get_tsc(env);
2354 EAX = (uint32_t)(val);
2355 EDX = (uint32_t)(val >> 32);
2356 }
2357
2358 #if defined(CONFIG_USER_ONLY)
2359 void helper_wrmsr(void)
2360 {
2361 }
2362
2363 void helper_rdmsr(void)
2364 {
2365 }
2366 #else
2367 void helper_wrmsr(void)
2368 {
2369 uint64_t val;
2370
2371 val = ((uint32_t)EAX) | ((uint64_t)((uint32_t)EDX) << 32);
2372
2373 switch((uint32_t)ECX) {
2374 case MSR_IA32_SYSENTER_CS:
2375 env->sysenter_cs = val & 0xffff;
2376 break;
2377 case MSR_IA32_SYSENTER_ESP:
2378 env->sysenter_esp = val;
2379 break;
2380 case MSR_IA32_SYSENTER_EIP:
2381 env->sysenter_eip = val;
2382 break;
2383 case MSR_IA32_APICBASE:
2384 cpu_set_apic_base(env, val);
2385 break;
2386 case MSR_EFER:
2387 {
2388 uint64_t update_mask;
2389 update_mask = 0;
2390 if (env->cpuid_ext2_features & CPUID_EXT2_SYSCALL)
2391 update_mask |= MSR_EFER_SCE;
2392 if (env->cpuid_ext2_features & CPUID_EXT2_LM)
2393 update_mask |= MSR_EFER_LME;
2394 if (env->cpuid_ext2_features & CPUID_EXT2_FFXSR)
2395 update_mask |= MSR_EFER_FFXSR;
2396 if (env->cpuid_ext2_features & CPUID_EXT2_NX)
2397 update_mask |= MSR_EFER_NXE;
2398 env->efer = (env->efer & ~update_mask) |
2399 (val & update_mask);
2400 }
2401 break;
2402 case MSR_STAR:
2403 env->star = val;
2404 break;
2405 case MSR_PAT:
2406 env->pat = val;
2407 break;
2408 #ifdef TARGET_X86_64
2409 case MSR_LSTAR:
2410 env->lstar = val;
2411 break;
2412 case MSR_CSTAR:
2413 env->cstar = val;
2414 break;
2415 case MSR_FMASK:
2416 env->fmask = val;
2417 break;
2418 case MSR_FSBASE:
2419 env->segs[R_FS].base = val;
2420 break;
2421 case MSR_GSBASE:
2422 env->segs[R_GS].base = val;
2423 break;
2424 case MSR_KERNELGSBASE:
2425 env->kernelgsbase = val;
2426 break;
2427 #endif
2428 default:
2429 /* XXX: exception ? */
2430 break;
2431 }
2432 }
2433
2434 void helper_rdmsr(void)
2435 {
2436 uint64_t val;
2437 switch((uint32_t)ECX) {
2438 case MSR_IA32_SYSENTER_CS:
2439 val = env->sysenter_cs;
2440 break;
2441 case MSR_IA32_SYSENTER_ESP:
2442 val = env->sysenter_esp;
2443 break;
2444 case MSR_IA32_SYSENTER_EIP:
2445 val = env->sysenter_eip;
2446 break;
2447 case MSR_IA32_APICBASE:
2448 val = cpu_get_apic_base(env);
2449 break;
2450 case MSR_EFER:
2451 val = env->efer;
2452 break;
2453 case MSR_STAR:
2454 val = env->star;
2455 break;
2456 case MSR_PAT:
2457 val = env->pat;
2458 break;
2459 #ifdef TARGET_X86_64
2460 case MSR_LSTAR:
2461 val = env->lstar;
2462 break;
2463 case MSR_CSTAR:
2464 val = env->cstar;
2465 break;
2466 case MSR_FMASK:
2467 val = env->fmask;
2468 break;
2469 case MSR_FSBASE:
2470 val = env->segs[R_FS].base;
2471 break;
2472 case MSR_GSBASE:
2473 val = env->segs[R_GS].base;
2474 break;
2475 case MSR_KERNELGSBASE:
2476 val = env->kernelgsbase;
2477 break;
2478 #endif
2479 default:
2480 /* XXX: exception ? */
2481 val = 0;
2482 break;
2483 }
2484 EAX = (uint32_t)(val);
2485 EDX = (uint32_t)(val >> 32);
2486 }
2487 #endif
2488
2489 void helper_lsl(void)
2490 {
2491 unsigned int selector, limit;
2492 uint32_t e1, e2, eflags;
2493 int rpl, dpl, cpl, type;
2494
2495 eflags = cc_table[CC_OP].compute_all();
2496 selector = T0 & 0xffff;
2497 if (load_segment(&e1, &e2, selector) != 0)
2498 goto fail;
2499 rpl = selector & 3;
2500 dpl = (e2 >> DESC_DPL_SHIFT) & 3;
2501 cpl = env->hflags & HF_CPL_MASK;
2502 if (e2 & DESC_S_MASK) {
2503 if ((e2 & DESC_CS_MASK) && (e2 & DESC_C_MASK)) {
2504 /* conforming */
2505 } else {
2506 if (dpl < cpl || dpl < rpl)
2507 goto fail;
2508 }
2509 } else {
2510 type = (e2 >> DESC_TYPE_SHIFT) & 0xf;
2511 switch(type) {
2512 case 1:
2513 case 2:
2514 case 3:
2515 case 9:
2516 case 11:
2517 break;
2518 default:
2519 goto fail;
2520 }
2521 if (dpl < cpl || dpl < rpl) {
2522 fail:
2523 CC_SRC = eflags & ~CC_Z;
2524 return;
2525 }
2526 }
2527 limit = get_seg_limit(e1, e2);
2528 T1 = limit;
2529 CC_SRC = eflags | CC_Z;
2530 }
2531
2532 void helper_lar(void)
2533 {
2534 unsigned int selector;
2535 uint32_t e1, e2, eflags;
2536 int rpl, dpl, cpl, type;
2537
2538 eflags = cc_table[CC_OP].compute_all();
2539 selector = T0 & 0xffff;
2540 if ((selector & 0xfffc) == 0)
2541 goto fail;
2542 if (load_segment(&e1, &e2, selector) != 0)
2543 goto fail;
2544 rpl = selector & 3;
2545 dpl = (e2 >> DESC_DPL_SHIFT) & 3;
2546 cpl = env->hflags & HF_CPL_MASK;
2547 if (e2 & DESC_S_MASK) {
2548 if ((e2 & DESC_CS_MASK) && (e2 & DESC_C_MASK)) {
2549 /* conforming */
2550 } else {
2551 if (dpl < cpl || dpl < rpl)
2552 goto fail;
2553 }
2554 } else {
2555 type = (e2 >> DESC_TYPE_SHIFT) & 0xf;
2556 switch(type) {
2557 case 1:
2558 case 2:
2559 case 3:
2560 case 4:
2561 case 5:
2562 case 9:
2563 case 11:
2564 case 12:
2565 break;
2566 default:
2567 goto fail;
2568 }
2569 if (dpl < cpl || dpl < rpl) {
2570 fail:
2571 CC_SRC = eflags & ~CC_Z;
2572 return;
2573 }
2574 }
2575 T1 = e2 & 0x00f0ff00;
2576 CC_SRC = eflags | CC_Z;
2577 }
2578
2579 void helper_verr(void)
2580 {
2581 unsigned int selector;
2582 uint32_t e1, e2, eflags;
2583 int rpl, dpl, cpl;
2584
2585 eflags = cc_table[CC_OP].compute_all();
2586 selector = T0 & 0xffff;
2587 if ((selector & 0xfffc) == 0)
2588 goto fail;
2589 if (load_segment(&e1, &e2, selector) != 0)
2590 goto fail;
2591 if (!(e2 & DESC_S_MASK))
2592 goto fail;
2593 rpl = selector & 3;
2594 dpl = (e2 >> DESC_DPL_SHIFT) & 3;
2595 cpl = env->hflags & HF_CPL_MASK;
2596 if (e2 & DESC_CS_MASK) {
2597 if (!(e2 & DESC_R_MASK))
2598 goto fail;
2599 if (!(e2 & DESC_C_MASK)) {
2600 if (dpl < cpl || dpl < rpl)
2601 goto fail;
2602 }
2603 } else {
2604 if (dpl < cpl || dpl < rpl) {
2605 fail:
2606 CC_SRC = eflags & ~CC_Z;
2607 return;
2608 }
2609 }
2610 CC_SRC = eflags | CC_Z;
2611 }
2612
2613 void helper_verw(void)
2614 {
2615 unsigned int selector;
2616 uint32_t e1, e2, eflags;
2617 int rpl, dpl, cpl;
2618
2619 eflags = cc_table[CC_OP].compute_all();
2620 selector = T0 & 0xffff;
2621 if ((selector & 0xfffc) == 0)
2622 goto fail;
2623 if (load_segment(&e1, &e2, selector) != 0)
2624 goto fail;
2625 if (!(e2 & DESC_S_MASK))
2626 goto fail;
2627 rpl = selector & 3;
2628 dpl = (e2 >> DESC_DPL_SHIFT) & 3;
2629 cpl = env->hflags & HF_CPL_MASK;
2630 if (e2 & DESC_CS_MASK) {
2631 goto fail;
2632 } else {
2633 if (dpl < cpl || dpl < rpl)
2634 goto fail;
2635 if (!(e2 & DESC_W_MASK)) {
2636 fail:
2637 CC_SRC = eflags & ~CC_Z;
2638 return;
2639 }
2640 }
2641 CC_SRC = eflags | CC_Z;
2642 }
2643
2644 /* FPU helpers */
2645
2646 void helper_fldt_ST0_A0(void)
2647 {
2648 int new_fpstt;
2649 new_fpstt = (env->fpstt - 1) & 7;
2650 env->fpregs[new_fpstt].d = helper_fldt(A0);
2651 env->fpstt = new_fpstt;
2652 env->fptags[new_fpstt] = 0; /* validate stack entry */
2653 }
2654
2655 void helper_fstt_ST0_A0(void)
2656 {
2657 helper_fstt(ST0, A0);
2658 }
2659
2660 void fpu_set_exception(int mask)
2661 {
2662 env->fpus |= mask;
2663 if (env->fpus & (~env->fpuc & FPUC_EM))
2664 env->fpus |= FPUS_SE | FPUS_B;
2665 }
2666
2667 CPU86_LDouble helper_fdiv(CPU86_LDouble a, CPU86_LDouble b)
2668 {
2669 if (b == 0.0)
2670 fpu_set_exception(FPUS_ZE);
2671 return a / b;
2672 }
2673
2674 void fpu_raise_exception(void)
2675 {
2676 if (env->cr[0] & CR0_NE_MASK) {
2677 raise_exception(EXCP10_COPR);
2678 }
2679 #if !defined(CONFIG_USER_ONLY)
2680 else {
2681 cpu_set_ferr(env);
2682 }
2683 #endif
2684 }
2685
2686 /* BCD ops */
2687
2688 void helper_fbld_ST0_A0(void)
2689 {
2690 CPU86_LDouble tmp;
2691 uint64_t val;
2692 unsigned int v;
2693 int i;
2694
2695 val = 0;
2696 for(i = 8; i >= 0; i--) {
2697 v = ldub(A0 + i);
2698 val = (val * 100) + ((v >> 4) * 10) + (v & 0xf);
2699 }
2700 tmp = val;
2701 if (ldub(A0 + 9) & 0x80)
2702 tmp = -tmp;
2703 fpush();
2704 ST0 = tmp;
2705 }
2706
2707 void helper_fbst_ST0_A0(void)
2708 {
2709 int v;
2710 target_ulong mem_ref, mem_end;
2711 int64_t val;
2712
2713 val = floatx_to_int64(ST0, &env->fp_status);
2714 mem_ref = A0;
2715 mem_end = mem_ref + 9;
2716 if (val < 0) {
2717 stb(mem_end, 0x80);
2718 val = -val;
2719 } else {
2720 stb(mem_end, 0x00);
2721 }
2722 while (mem_ref < mem_end) {
2723 if (val == 0)
2724 break;
2725 v = val % 100;
2726 val = val / 100;
2727 v = ((v / 10) << 4) | (v % 10);
2728 stb(mem_ref++, v);
2729 }
2730 while (mem_ref < mem_end) {
2731 stb(mem_ref++, 0);
2732 }
2733 }
2734
2735 void helper_f2xm1(void)
2736 {
2737 ST0 = pow(2.0,ST0) - 1.0;
2738 }
2739
2740 void helper_fyl2x(void)
2741 {
2742 CPU86_LDouble fptemp;
2743
2744 fptemp = ST0;
2745 if (fptemp>0.0){
2746 fptemp = log(fptemp)/log(2.0); /* log2(ST) */
2747 ST1 *= fptemp;
2748 fpop();
2749 } else {
2750 env->fpus &= (~0x4700);
2751 env->fpus |= 0x400;
2752 }
2753 }
2754
2755 void helper_fptan(void)
2756 {
2757 CPU86_LDouble fptemp;
2758
2759 fptemp = ST0;
2760 if((fptemp > MAXTAN)||(fptemp < -MAXTAN)) {
2761 env->fpus |= 0x400;
2762 } else {
2763 ST0 = tan(fptemp);
2764 fpush();
2765 ST0 = 1.0;
2766 env->fpus &= (~0x400); /* C2 <-- 0 */
2767 /* the above code is for |arg| < 2**52 only */
2768 }
2769 }
2770
2771 void helper_fpatan(void)
2772 {
2773 CPU86_LDouble fptemp, fpsrcop;
2774
2775 fpsrcop = ST1;
2776 fptemp = ST0;
2777 ST1 = atan2(fpsrcop,fptemp);
2778 fpop();
2779 }
2780
2781 void helper_fxtract(void)
2782 {
2783 CPU86_LDoubleU temp;
2784 unsigned int expdif;
2785
2786 temp.d = ST0;
2787 expdif = EXPD(temp) - EXPBIAS;
2788 /*DP exponent bias*/
2789 ST0 = expdif;
2790 fpush();
2791 BIASEXPONENT(temp);
2792 ST0 = temp.d;
2793 }
2794
2795 void helper_fprem1(void)
2796 {
2797 CPU86_LDouble dblq, fpsrcop, fptemp;
2798 CPU86_LDoubleU fpsrcop1, fptemp1;
2799 int expdif;
2800 int q;
2801
2802 fpsrcop = ST0;
2803 fptemp = ST1;
2804 fpsrcop1.d = fpsrcop;
2805 fptemp1.d = fptemp;
2806 expdif = EXPD(fpsrcop1) - EXPD(fptemp1);
2807 if (expdif < 53) {
2808 dblq = fpsrcop / fptemp;
2809 dblq = (dblq < 0.0)? ceil(dblq): floor(dblq);
2810 ST0 = fpsrcop - fptemp*dblq;
2811 q = (int)dblq; /* cutting off top bits is assumed here */
2812 env->fpus &= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */
2813 /* (C0,C1,C3) <-- (q2,q1,q0) */
2814 env->fpus |= (q&0x4) << 6; /* (C0) <-- q2 */
2815 env->fpus |= (q&0x2) << 8; /* (C1) <-- q1 */
2816 env->fpus |= (q&0x1) << 14; /* (C3) <-- q0 */
2817 } else {
2818 env->fpus |= 0x400; /* C2 <-- 1 */
2819 fptemp = pow(2.0, expdif-50);
2820 fpsrcop = (ST0 / ST1) / fptemp;
2821 /* fpsrcop = integer obtained by rounding to the nearest */
2822 fpsrcop = (fpsrcop-floor(fpsrcop) < ceil(fpsrcop)-fpsrcop)?
2823 floor(fpsrcop): ceil(fpsrcop);
2824 ST0 -= (ST1 * fpsrcop * fptemp);
2825 }
2826 }
2827
2828 void helper_fprem(void)
2829 {
2830 CPU86_LDouble dblq, fpsrcop, fptemp;
2831 CPU86_LDoubleU fpsrcop1, fptemp1;
2832 int expdif;
2833 int q;
2834
2835 fpsrcop = ST0;
2836 fptemp = ST1;
2837 fpsrcop1.d = fpsrcop;
2838 fptemp1.d = fptemp;
2839 expdif = EXPD(fpsrcop1) - EXPD(fptemp1);
2840 if ( expdif < 53 ) {
2841 dblq = fpsrcop / fptemp;
2842 dblq = (dblq < 0.0)? ceil(dblq): floor(dblq);
2843 ST0 = fpsrcop - fptemp*dblq;
2844 q = (int)dblq; /* cutting off top bits is assumed here */
2845 env->fpus &= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */
2846 /* (C0,C1,C3) <-- (q2,q1,q0) */
2847 env->fpus |= (q&0x4) << 6; /* (C0) <-- q2 */
2848 env->fpus |= (q&0x2) << 8; /* (C1) <-- q1 */
2849 env->fpus |= (q&0x1) << 14; /* (C3) <-- q0 */
2850 } else {
2851 env->fpus |= 0x400; /* C2 <-- 1 */
2852 fptemp = pow(2.0, expdif-50);
2853 fpsrcop = (ST0 / ST1) / fptemp;
2854 /* fpsrcop = integer obtained by chopping */
2855 fpsrcop = (fpsrcop < 0.0)?
2856 -(floor(fabs(fpsrcop))): floor(fpsrcop);
2857 ST0 -= (ST1 * fpsrcop * fptemp);
2858 }
2859 }
2860
2861 void helper_fyl2xp1(void)
2862 {
2863 CPU86_LDouble fptemp;
2864
2865 fptemp = ST0;
2866 if ((fptemp+1.0)>0.0) {
2867 fptemp = log(fptemp+1.0) / log(2.0); /* log2(ST+1.0) */
2868 ST1 *= fptemp;
2869 fpop();
2870 } else {
2871 env->fpus &= (~0x4700);
2872 env->fpus |= 0x400;
2873 }
2874 }
2875
2876 void helper_fsqrt(void)
2877 {
2878 CPU86_LDouble fptemp;
2879
2880 fptemp = ST0;
2881 if (fptemp<0.0) {
2882 env->fpus &= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */
2883 env->fpus |= 0x400;
2884 }
2885 ST0 = sqrt(fptemp);
2886 }
2887
2888 void helper_fsincos(void)
2889 {
2890 CPU86_LDouble fptemp;
2891
2892 fptemp = ST0;
2893 if ((fptemp > MAXTAN)||(fptemp < -MAXTAN)) {
2894 env->fpus |= 0x400;
2895 } else {
2896 ST0 = sin(fptemp);
2897 fpush();
2898 ST0 = cos(fptemp);
2899 env->fpus &= (~0x400); /* C2 <-- 0 */
2900 /* the above code is for |arg| < 2**63 only */
2901 }
2902 }
2903
2904 void helper_frndint(void)
2905 {
2906 ST0 = floatx_round_to_int(ST0, &env->fp_status);
2907 }
2908
2909 void helper_fscale(void)
2910 {
2911 ST0 = ldexp (ST0, (int)(ST1));
2912 }
2913
2914 void helper_fsin(void)
2915 {
2916 CPU86_LDouble fptemp;
2917
2918 fptemp = ST0;
2919 if ((fptemp > MAXTAN)||(fptemp < -MAXTAN)) {
2920 env->fpus |= 0x400;
2921 } else {
2922 ST0 = sin(fptemp);
2923 env->fpus &= (~0x400); /* C2 <-- 0 */
2924 /* the above code is for |arg| < 2**53 only */
2925 }
2926 }
2927
2928 void helper_fcos(void)
2929 {
2930 CPU86_LDouble fptemp;
2931
2932 fptemp = ST0;
2933 if((fptemp > MAXTAN)||(fptemp < -MAXTAN)) {
2934 env->fpus |= 0x400;
2935 } else {
2936 ST0 = cos(fptemp);
2937 env->fpus &= (~0x400); /* C2 <-- 0 */
2938 /* the above code is for |arg5 < 2**63 only */
2939 }
2940 }
2941
2942 void helper_fxam_ST0(void)
2943 {
2944 CPU86_LDoubleU temp;
2945 int expdif;
2946
2947 temp.d = ST0;
2948
2949 env->fpus &= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */
2950 if (SIGND(temp))
2951 env->fpus |= 0x200; /* C1 <-- 1 */
2952
2953 /* XXX: test fptags too */
2954 expdif = EXPD(temp);
2955 if (expdif == MAXEXPD) {
2956 #ifdef USE_X86LDOUBLE
2957 if (MANTD(temp) == 0x8000000000000000ULL)
2958 #else
2959 if (MANTD(temp) == 0)
2960 #endif
2961 env->fpus |= 0x500 /*Infinity*/;
2962 else
2963 env->fpus |= 0x100 /*NaN*/;
2964 } else if (expdif == 0) {
2965 if (MANTD(temp) == 0)
2966 env->fpus |= 0x4000 /*Zero*/;
2967 else
2968 env->fpus |= 0x4400 /*Denormal*/;
2969 } else {
2970 env->fpus |= 0x400;
2971 }
2972 }
2973
2974 void helper_fstenv(target_ulong ptr, int data32)
2975 {
2976 int fpus, fptag, exp, i;
2977 uint64_t mant;
2978 CPU86_LDoubleU tmp;
2979
2980 fpus = (env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11;
2981 fptag = 0;
2982 for (i=7; i>=0; i--) {
2983 fptag <<= 2;
2984 if (env->fptags[i]) {
2985 fptag |= 3;
2986 } else {
2987 tmp.d = env->fpregs[i].d;
2988 exp = EXPD(tmp);
2989 mant = MANTD(tmp);
2990 if (exp == 0 && mant == 0) {
2991 /* zero */
2992 fptag |= 1;
2993 } else if (exp == 0 || exp == MAXEXPD
2994 #ifdef USE_X86LDOUBLE
2995 || (mant & (1LL << 63)) == 0
2996 #endif
2997 ) {
2998 /* NaNs, infinity, denormal */
2999 fptag |= 2;
3000 }
3001 }
3002 }
3003 if (data32) {
3004 /* 32 bit */
3005 stl(ptr, env->fpuc);
3006 stl(ptr + 4, fpus);
3007 stl(ptr + 8, fptag);
3008 stl(ptr + 12, 0); /* fpip */
3009 stl(ptr + 16, 0); /* fpcs */
3010 stl(ptr + 20, 0); /* fpoo */
3011 stl(ptr + 24, 0); /* fpos */
3012 } else {
3013 /* 16 bit */
3014 stw(ptr, env->fpuc);
3015 stw(ptr + 2, fpus);
3016 stw(ptr + 4, fptag);
3017 stw(ptr + 6, 0);
3018 stw(ptr + 8, 0);
3019 stw(ptr + 10, 0);
3020 stw(ptr + 12, 0);
3021 }
3022 }
3023
3024 void helper_fldenv(target_ulong ptr, int data32)
3025 {
3026 int i, fpus, fptag;
3027
3028 if (data32) {
3029 env->fpuc = lduw(ptr);
3030 fpus = lduw(ptr + 4);
3031 fptag = lduw(ptr + 8);
3032 }
3033 else {
3034 env->fpuc = lduw(ptr);
3035 fpus = lduw(ptr + 2);
3036 fptag = lduw(ptr + 4);
3037 }
3038 env->fpstt = (fpus >> 11) & 7;
3039 env->fpus = fpus & ~0x3800;
3040 for(i = 0;i < 8; i++) {
3041 env->fptags[i] = ((fptag & 3) == 3);
3042 fptag >>= 2;
3043 }
3044 }
3045
3046 void helper_fsave(target_ulong ptr, int data32)
3047 {
3048 CPU86_LDouble tmp;
3049 int i;
3050
3051 helper_fstenv(ptr, data32);
3052
3053 ptr += (14 << data32);
3054 for(i = 0;i < 8; i++) {
3055 tmp = ST(i);
3056 helper_fstt(tmp, ptr);
3057 ptr += 10;
3058 }
3059
3060 /* fninit */
3061 env->fpus = 0;
3062 env->fpstt = 0;
3063 env->fpuc = 0x37f;
3064 env->fptags[0] = 1;
3065 env->fptags[1] = 1;
3066 env->fptags[2] = 1;
3067 env->fptags[3] = 1;
3068 env->fptags[4] = 1;
3069 env->fptags[5] = 1;
3070 env->fptags[6] = 1;
3071 env->fptags[7] = 1;
3072 }
3073
3074 void helper_frstor(target_ulong ptr, int data32)
3075 {
3076 CPU86_LDouble tmp;
3077 int i;
3078
3079 helper_fldenv(ptr, data32);
3080 ptr += (14 << data32);
3081
3082 for(i = 0;i < 8; i++) {
3083 tmp = helper_fldt(ptr);
3084 ST(i) = tmp;
3085 ptr += 10;
3086 }
3087 }
3088
3089 void helper_fxsave(target_ulong ptr, int data64)
3090 {
3091 int fpus, fptag, i, nb_xmm_regs;
3092 CPU86_LDouble tmp;
3093 target_ulong addr;
3094
3095 fpus = (env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11;
3096 fptag = 0;
3097 for(i = 0; i < 8; i++) {
3098 fptag |= (env->fptags[i] << i);
3099 }
3100 stw(ptr, env->fpuc);
3101 stw(ptr + 2, fpus);
3102 stw(ptr + 4, fptag ^ 0xff);
3103
3104 addr = ptr + 0x20;
3105 for(i = 0;i < 8; i++) {
3106 tmp = ST(i);
3107 helper_fstt(tmp, addr);
3108 addr += 16;
3109 }
3110
3111 if (env->cr[4] & CR4_OSFXSR_MASK) {
3112 /* XXX: finish it */
3113 stl(ptr + 0x18, env->mxcsr); /* mxcsr */
3114 stl(ptr + 0x1c, 0x0000ffff); /* mxcsr_mask */
3115 nb_xmm_regs = 8 << data64;
3116 addr = ptr + 0xa0;
3117 for(i = 0; i < nb_xmm_regs; i++) {
3118 stq(addr, env->xmm_regs[i].XMM_Q(0));
3119 stq(addr + 8, env->xmm_regs[i].XMM_Q(1));
3120 addr += 16;
3121 }
3122 }
3123 }
3124
3125 void helper_fxrstor(target_ulong ptr, int data64)
3126 {
3127 int i, fpus, fptag, nb_xmm_regs;
3128 CPU86_LDouble tmp;
3129 target_ulong addr;
3130
3131 env->fpuc = lduw(ptr);
3132 fpus = lduw(ptr + 2);
3133 fptag = lduw(ptr + 4);
3134 env->fpstt = (fpus >> 11) & 7;
3135 env->fpus = fpus & ~0x3800;
3136 fptag ^= 0xff;
3137 for(i = 0;i < 8; i++) {
3138 env->fptags[i] = ((fptag >> i) & 1);
3139 }
3140
3141 addr = ptr + 0x20;
3142 for(i = 0;i < 8; i++) {
3143 tmp = helper_fldt(addr);
3144 ST(i) = tmp;
3145 addr += 16;
3146 }
3147
3148 if (env->cr[4] & CR4_OSFXSR_MASK) {
3149 /* XXX: finish it */
3150 env->mxcsr = ldl(ptr + 0x18);
3151 //ldl(ptr + 0x1c);
3152 nb_xmm_regs = 8 << data64;
3153 addr = ptr + 0xa0;
3154 for(i = 0; i < nb_xmm_regs; i++) {
3155 env->xmm_regs[i].XMM_Q(0) = ldq(addr);
3156 env->xmm_regs[i].XMM_Q(1) = ldq(addr + 8);
3157 addr += 16;
3158 }
3159 }
3160 }
3161
3162 #ifndef USE_X86LDOUBLE
3163
3164 void cpu_get_fp80(uint64_t *pmant, uint16_t *pexp, CPU86_LDouble f)
3165 {
3166 CPU86_LDoubleU temp;
3167 int e;
3168
3169 temp.d = f;
3170 /* mantissa */
3171 *pmant = (MANTD(temp) << 11) | (1LL << 63);
3172 /* exponent + sign */
3173 e = EXPD(temp) - EXPBIAS + 16383;
3174 e |= SIGND(temp) >> 16;
3175 *pexp = e;
3176 }
3177
3178 CPU86_LDouble cpu_set_fp80(uint64_t mant, uint16_t upper)
3179 {
3180 CPU86_LDoubleU temp;
3181 int e;
3182 uint64_t ll;
3183
3184 /* XXX: handle overflow ? */
3185 e = (upper & 0x7fff) - 16383 + EXPBIAS; /* exponent */
3186 e |= (upper >> 4) & 0x800; /* sign */
3187 ll = (mant >> 11) & ((1LL << 52) - 1);
3188 #ifdef __arm__
3189 temp.l.upper = (e << 20) | (ll >> 32);
3190 temp.l.lower = ll;
3191 #else
3192 temp.ll = ll | ((uint64_t)e << 52);
3193 #endif
3194 return temp.d;
3195 }
3196
3197 #else
3198
3199 void cpu_get_fp80(uint64_t *pmant, uint16_t *pexp, CPU86_LDouble f)
3200 {
3201 CPU86_LDoubleU temp;
3202
3203 temp.d = f;
3204 *pmant = temp.l.lower;
3205 *pexp = temp.l.upper;
3206 }
3207
3208 CPU86_LDouble cpu_set_fp80(uint64_t mant, uint16_t upper)
3209 {
3210 CPU86_LDoubleU temp;
3211
3212 temp.l.upper = upper;
3213 temp.l.lower = mant;
3214 return temp.d;
3215 }
3216 #endif
3217
3218 #ifdef TARGET_X86_64
3219
3220 //#define DEBUG_MULDIV
3221
3222 static void add128(uint64_t *plow, uint64_t *phigh, uint64_t a, uint64_t b)
3223 {
3224 *plow += a;
3225 /* carry test */
3226 if (*plow < a)
3227 (*phigh)++;
3228 *phigh += b;
3229 }
3230
3231 static void neg128(uint64_t *plow, uint64_t *phigh)
3232 {
3233 *plow = ~ *plow;
3234 *phigh = ~ *phigh;
3235 add128(plow, phigh, 1, 0);
3236 }
3237
3238 static void mul64(uint64_t *plow, uint64_t *phigh, uint64_t a, uint64_t b)
3239 {
3240 uint32_t a0, a1, b0, b1;
3241 uint64_t v;
3242
3243 a0 = a;
3244 a1 = a >> 32;
3245
3246 b0 = b;
3247 b1 = b >> 32;
3248
3249 v = (uint64_t)a0 * (uint64_t)b0;
3250 *plow = v;
3251 *phigh = 0;
3252
3253 v = (uint64_t)a0 * (uint64_t)b1;
3254 add128(plow, phigh, v << 32, v >> 32);
3255
3256 v = (uint64_t)a1 * (uint64_t)b0;
3257 add128(plow, phigh, v << 32, v >> 32);
3258
3259 v = (uint64_t)a1 * (uint64_t)b1;
3260 *phigh += v;
3261 #ifdef DEBUG_MULDIV
3262 printf("mul: 0x%016" PRIx64 " * 0x%016" PRIx64 " = 0x%016" PRIx64 "%016" PRIx64 "\n",
3263 a, b, *phigh, *plow);
3264 #endif
3265 }
3266
3267 static void imul64(uint64_t *plow, uint64_t *phigh, int64_t a, int64_t b)
3268 {
3269 int sa, sb;
3270 sa = (a < 0);
3271 if (sa)
3272 a = -a;
3273 sb = (b < 0);
3274 if (sb)
3275 b = -b;
3276 mul64(plow, phigh, a, b);
3277 if (sa ^ sb) {
3278 neg128(plow, phigh);
3279 }
3280 }
3281
3282 /* return TRUE if overflow */
3283 static int div64(uint64_t *plow, uint64_t *phigh, uint64_t b)
3284 {
3285 uint64_t q, r, a1, a0;
3286 int i, qb, ab;
3287
3288 a0 = *plow;
3289 a1 = *phigh;
3290 if (a1 == 0) {
3291 q = a0 / b;
3292 r = a0 % b;
3293 *plow = q;
3294 *phigh = r;
3295 } else {
3296 if (a1 >= b)
3297 return 1;
3298 /* XXX: use a better algorithm */
3299 for(i = 0; i < 64; i++) {
3300 ab = a1 >> 63;
3301 a1 = (a1 << 1) | (a0 >> 63);
3302 if (ab || a1 >= b) {
3303 a1 -= b;
3304 qb = 1;
3305 } else {
3306 qb = 0;
3307 }
3308 a0 = (a0 << 1) | qb;
3309 }
3310 #if defined(DEBUG_MULDIV)
3311 printf("div: 0x%016" PRIx64 "%016" PRIx64 " / 0x%016" PRIx64 ": q=0x%016" PRIx64 " r=0x%016" PRIx64 "\n",
3312 *phigh, *plow, b, a0, a1);
3313 #endif
3314 *plow = a0;
3315 *phigh = a1;
3316 }
3317 return 0;
3318 }
3319
3320 /* return TRUE if overflow */
3321 static int idiv64(uint64_t *plow, uint64_t *phigh, int64_t b)
3322 {
3323 int sa, sb;
3324 sa = ((int64_t)*phigh < 0);
3325 if (sa)
3326 neg128(plow, phigh);
3327 sb = (b < 0);
3328 if (sb)
3329 b = -b;
3330 if (div64(plow, phigh, b) != 0)
3331 return 1;
3332 if (sa ^ sb) {
3333 if (*plow > (1ULL << 63))
3334 return 1;
3335 *plow = - *plow;
3336 } else {
3337 if (*plow >= (1ULL << 63))
3338 return 1;
3339 }
3340 if (sa)
3341 *phigh = - *phigh;
3342 return 0;
3343 }
3344
3345 void helper_mulq_EAX_T0(void)
3346 {
3347 uint64_t r0, r1;
3348
3349 mul64(&r0, &r1, EAX, T0);
3350 EAX = r0;
3351 EDX = r1;
3352 CC_DST = r0;
3353 CC_SRC = r1;
3354 }
3355
3356 void helper_imulq_EAX_T0(void)
3357 {
3358 uint64_t r0, r1;
3359
3360 imul64(&r0, &r1, EAX, T0);
3361 EAX = r0;
3362 EDX = r1;
3363 CC_DST = r0;
3364 CC_SRC = ((int64_t)r1 != ((int64_t)r0 >> 63));
3365 }
3366
3367 void helper_imulq_T0_T1(void)
3368 {
3369 uint64_t r0, r1;
3370
3371 imul64(&r0, &r1, T0, T1);
3372 T0 = r0;
3373 CC_DST = r0;
3374 CC_SRC = ((int64_t)r1 != ((int64_t)r0 >> 63));
3375 }
3376
3377 void helper_divq_EAX_T0(void)
3378 {
3379 uint64_t r0, r1;
3380 if (T0 == 0) {
3381 raise_exception(EXCP00_DIVZ);
3382 }
3383 r0 = EAX;
3384 r1 = EDX;
3385 if (div64(&r0, &r1, T0))
3386 raise_exception(EXCP00_DIVZ);
3387 EAX = r0;
3388 EDX = r1;
3389 }
3390
3391 void helper_idivq_EAX_T0(void)
3392 {
3393 uint64_t r0, r1;
3394 if (T0 == 0) {
3395 raise_exception(EXCP00_DIVZ);
3396 }
3397 r0 = EAX;
3398 r1 = EDX;
3399 if (idiv64(&r0, &r1, T0))
3400 raise_exception(EXCP00_DIVZ);
3401 EAX = r0;
3402 EDX = r1;
3403 }
3404
3405 void helper_bswapq_T0(void)
3406 {
3407 T0 = bswap64(T0);
3408 }
3409 #endif
3410
3411 float approx_rsqrt(float a)
3412 {
3413 return 1.0 / sqrt(a);
3414 }
3415
3416 float approx_rcp(float a)
3417 {
3418 return 1.0 / a;
3419 }
3420
3421 void update_fp_status(void)
3422 {
3423 int rnd_type;
3424
3425 /* set rounding mode */
3426 switch(env->fpuc & RC_MASK) {
3427 default:
3428 case RC_NEAR:
3429 rnd_type = float_round_nearest_even;
3430 break;
3431 case RC_DOWN:
3432 rnd_type = float_round_down;
3433 break;
3434 case RC_UP:
3435 rnd_type = float_round_up;
3436 break;
3437 case RC_CHOP:
3438 rnd_type = float_round_to_zero;
3439 break;
3440 }
3441 set_float_rounding_mode(rnd_type, &env->fp_status);
3442 #ifdef FLOATX80
3443 switch((env->fpuc >> 8) & 3) {
3444 case 0:
3445 rnd_type = 32;
3446 break;
3447 case 2:
3448 rnd_type = 64;
3449 break;
3450 case 3:
3451 default:
3452 rnd_type = 80;
3453 break;
3454 }
3455 set_floatx80_rounding_precision(rnd_type, &env->fp_status);
3456 #endif
3457 }
3458
3459 #if !defined(CONFIG_USER_ONLY)
3460
3461 #define MMUSUFFIX _mmu
3462 #define GETPC() (__builtin_return_address(0))
3463
3464 #define SHIFT 0
3465 #include "softmmu_template.h"
3466
3467 #define SHIFT 1
3468 #include "softmmu_template.h"
3469
3470 #define SHIFT 2
3471 #include "softmmu_template.h"
3472
3473 #define SHIFT 3
3474 #include "softmmu_template.h"
3475
3476 #endif
3477
3478 /* try to fill the TLB and return an exception if error. If retaddr is
3479 NULL, it means that the function was called in C code (i.e. not
3480 from generated code or from helper.c) */
3481 /* XXX: fix it to restore all registers */
3482 void tlb_fill(target_ulong addr, int is_write, int is_user, void *retaddr)
3483 {
3484 TranslationBlock *tb;
3485 int ret;
3486 unsigned long pc;
3487 CPUX86State *saved_env;
3488
3489 /* XXX: hack to restore env in all cases, even if not called from
3490 generated code */
3491 saved_env = env;
3492 env = cpu_single_env;
3493
3494 ret = cpu_x86_handle_mmu_fault(env, addr, is_write, is_user, 1);
3495 if (ret) {
3496 if (retaddr) {
3497 /* now we have a real cpu fault */
3498 pc = (unsigned long)retaddr;
3499 tb = tb_find_pc(pc);
3500 if (tb) {
3501 /* the PC is inside the translated code. It means that we have
3502 a virtual CPU fault */
3503 cpu_restore_state(tb, env, pc, NULL);
3504 }
3505 }
3506 if (retaddr)
3507 raise_exception_err(env->exception_index, env->error_code);
3508 else
3509 raise_exception_err_norestore(env->exception_index, env->error_code);
3510 }
3511 env = saved_env;
3512 }
Qemu copy for testing