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helper_lret_protected fix for kqemu (Paul Brook)
[qemu.git] / target-i386 / helper.c
CommitLineData
2c0262af
FB		 1/*
2 * i386 helpers
3 *
4 * Copyright (c) 2003 Fabrice Bellard
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20#include "exec.h"
21
f3f2d9be
FB		 22//#define DEBUG_PCALL
23
8145122b
FB		 24#if 0
25#define raise_exception_err(a, b)\
26do {\
2ee73ac3 27 fprintf(logfile, "raise_exception line=%d\n", __LINE__);\
8145122b
FB		 28 (raise_exception_err)(a, b);\
29} while (0)
30#endif
31
2c0262af
FB		 32const uint8_t parity_table[256] = {
33 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
34 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
35 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
36 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
37 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
38 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
39 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
40 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
41 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
42 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
43 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
44 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
45 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
46 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
47 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
48 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
49 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
50 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
51 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
52 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
53 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
54 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
55 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
56 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
57 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
58 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
59 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
60 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
61 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
62 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
63 CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
64 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
65};
66
67/* modulo 17 table */
68const uint8_t rclw_table[32] = {
69 0, 1, 2, 3, 4, 5, 6, 7,
70 8, 9,10,11,12,13,14,15,
71 16, 0, 1, 2, 3, 4, 5, 6,
72 7, 8, 9,10,11,12,13,14,
73};
74
75/* modulo 9 table */
76const uint8_t rclb_table[32] = {
77 0, 1, 2, 3, 4, 5, 6, 7,
78 8, 0, 1, 2, 3, 4, 5, 6,
79 7, 8, 0, 1, 2, 3, 4, 5,
80 6, 7, 8, 0, 1, 2, 3, 4,
81};
82
83const CPU86_LDouble f15rk[7] =
84{
85 0.00000000000000000000L,
86 1.00000000000000000000L,
87 3.14159265358979323851L, /*pi*/
88 0.30102999566398119523L, /*lg2*/
89 0.69314718055994530943L, /*ln2*/
90 1.44269504088896340739L, /*l2e*/
91 3.32192809488736234781L, /*l2t*/
92};
93
94/* thread support */
95
96spinlock_t global_cpu_lock = SPIN_LOCK_UNLOCKED;
97
98void cpu_lock(void)
99{
100 spin_lock(&global_cpu_lock);
101}
102
103void cpu_unlock(void)
104{
105 spin_unlock(&global_cpu_lock);
106}
107
108void cpu_loop_exit(void)
109{
110 /* NOTE: the register at this point must be saved by hand because
111 longjmp restore them */
0d1a29f9 112 regs_to_env();
2c0262af
FB		 113 longjmp(env->jmp_env, 1);
114}
115
7e84c249
FB		 116/* return non zero if error */
117static inline int load_segment(uint32_t *e1_ptr, uint32_t *e2_ptr,
118 int selector)
119{
120 SegmentCache *dt;
121 int index;
14ce26e7 122 target_ulong ptr;
7e84c249
FB		 123
124 if (selector & 0x4)
125 dt = &env->ldt;
126 else
127 dt = &env->gdt;
128 index = selector & ~7;
129 if ((index + 7) > dt->limit)
130 return -1;
131 ptr = dt->base + index;
132 *e1_ptr = ldl_kernel(ptr);
133 *e2_ptr = ldl_kernel(ptr + 4);
134 return 0;
135}
136
137static inline unsigned int get_seg_limit(uint32_t e1, uint32_t e2)
138{
139 unsigned int limit;
140 limit = (e1 & 0xffff) | (e2 & 0x000f0000);
141 if (e2 & DESC_G_MASK)
142 limit = (limit << 12) | 0xfff;
143 return limit;
144}
145
14ce26e7 146static inline uint32_t get_seg_base(uint32_t e1, uint32_t e2)
7e84c249 147{
14ce26e7 148 return ((e1 >> 16) | ((e2 & 0xff) << 16) | (e2 & 0xff000000));
7e84c249
FB		 149}
150
151static inline void load_seg_cache_raw_dt(SegmentCache *sc, uint32_t e1, uint32_t e2)
152{
153 sc->base = get_seg_base(e1, e2);
154 sc->limit = get_seg_limit(e1, e2);
155 sc->flags = e2;
156}
157
158/* init the segment cache in vm86 mode. */
159static inline void load_seg_vm(int seg, int selector)
160{
161 selector &= 0xffff;
162 cpu_x86_load_seg_cache(env, seg, selector,
14ce26e7 163 (selector << 4), 0xffff, 0);
7e84c249
FB		 164}
165
2c0262af
FB		 166static inline void get_ss_esp_from_tss(uint32_t *ss_ptr,
167 uint32_t *esp_ptr, int dpl)
168{
169 int type, index, shift;
170
171#if 0
172 {
173 int i;
174 printf("TR: base=%p limit=%x\n", env->tr.base, env->tr.limit);
175 for(i=0;i<env->tr.limit;i++) {
176 printf("%02x ", env->tr.base[i]);
177 if ((i & 7) == 7) printf("\n");
178 }
179 printf("\n");
180 }
181#endif
182
183 if (!(env->tr.flags & DESC_P_MASK))
184 cpu_abort(env, "invalid tss");
185 type = (env->tr.flags >> DESC_TYPE_SHIFT) & 0xf;
186 if ((type & 7) != 1)
187 cpu_abort(env, "invalid tss type");
188 shift = type >> 3;
189 index = (dpl * 4 + 2) << shift;
190 if (index + (4 << shift) - 1 > env->tr.limit)
191 raise_exception_err(EXCP0A_TSS, env->tr.selector & 0xfffc);
192 if (shift == 0) {
61382a50
FB		 193 *esp_ptr = lduw_kernel(env->tr.base + index);
194 *ss_ptr = lduw_kernel(env->tr.base + index + 2);
2c0262af 195 } else {
61382a50
FB		 196 *esp_ptr = ldl_kernel(env->tr.base + index);
197 *ss_ptr = lduw_kernel(env->tr.base + index + 4);
2c0262af
FB		 198 }
199}
200
7e84c249
FB		 201/* XXX: merge with load_seg() */
202static void tss_load_seg(int seg_reg, int selector)
203{
204 uint32_t e1, e2;
205 int rpl, dpl, cpl;
206
207 if ((selector & 0xfffc) != 0) {
208 if (load_segment(&e1, &e2, selector) != 0)
209 raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
210 if (!(e2 & DESC_S_MASK))
211 raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
212 rpl = selector & 3;
213 dpl = (e2 >> DESC_DPL_SHIFT) & 3;
214 cpl = env->hflags & HF_CPL_MASK;
215 if (seg_reg == R_CS) {
216 if (!(e2 & DESC_CS_MASK))
217 raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
218 if (dpl != rpl)
219 raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
220 if ((e2 & DESC_C_MASK) && dpl > rpl)
221 raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
222
223 } else if (seg_reg == R_SS) {
224 /* SS must be writable data */
225 if ((e2 & DESC_CS_MASK) || !(e2 & DESC_W_MASK))
226 raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
227 if (dpl != cpl || dpl != rpl)
228 raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
229 } else {
230 /* not readable code */
231 if ((e2 & DESC_CS_MASK) && !(e2 & DESC_R_MASK))
232 raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
233 /* if data or non conforming code, checks the rights */
234 if (((e2 >> DESC_TYPE_SHIFT) & 0xf) < 12) {
235 if (dpl < cpl || dpl < rpl)
236 raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
237 }
238 }
239 if (!(e2 & DESC_P_MASK))
240 raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc);
241 cpu_x86_load_seg_cache(env, seg_reg, selector,
242 get_seg_base(e1, e2),
243 get_seg_limit(e1, e2),
244 e2);
245 } else {
246 if (seg_reg == R_SS || seg_reg == R_CS)
247 raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
248 }
249}
250
251#define SWITCH_TSS_JMP 0
252#define SWITCH_TSS_IRET 1
253#define SWITCH_TSS_CALL 2
254
255/* XXX: restore CPU state in registers (PowerPC case) */
256static void switch_tss(int tss_selector,
883da8e2
FB		 257 uint32_t e1, uint32_t e2, int source,
258 uint32_t next_eip)
2c0262af 259{
7e84c249 260 int tss_limit, tss_limit_max, type, old_tss_limit_max, old_type, v1, v2, i;
14ce26e7 261 target_ulong tss_base;
7e84c249
FB		 262 uint32_t new_regs[8], new_segs[6];
263 uint32_t new_eflags, new_eip, new_cr3, new_ldt, new_trap;
264 uint32_t old_eflags, eflags_mask;
2c0262af
FB		 265 SegmentCache *dt;
266 int index;
14ce26e7 267 target_ulong ptr;
2c0262af 268
7e84c249 269 type = (e2 >> DESC_TYPE_SHIFT) & 0xf;
dc6f57fd 270#ifdef DEBUG_PCALL
e19e89a5 271 if (loglevel & CPU_LOG_PCALL)
dc6f57fd
FB		 272 fprintf(logfile, "switch_tss: sel=0x%04x type=%d src=%d\n", tss_selector, type, source);
273#endif
7e84c249
FB		 274
275 /* if task gate, we read the TSS segment and we load it */
276 if (type == 5) {
277 if (!(e2 & DESC_P_MASK))
278 raise_exception_err(EXCP0B_NOSEG, tss_selector & 0xfffc);
279 tss_selector = e1 >> 16;
280 if (tss_selector & 4)
281 raise_exception_err(EXCP0A_TSS, tss_selector & 0xfffc);
282 if (load_segment(&e1, &e2, tss_selector) != 0)
283 raise_exception_err(EXCP0D_GPF, tss_selector & 0xfffc);
284 if (e2 & DESC_S_MASK)
285 raise_exception_err(EXCP0D_GPF, tss_selector & 0xfffc);
286 type = (e2 >> DESC_TYPE_SHIFT) & 0xf;
287 if ((type & 7) != 1)
288 raise_exception_err(EXCP0D_GPF, tss_selector & 0xfffc);
289 }
290
291 if (!(e2 & DESC_P_MASK))
292 raise_exception_err(EXCP0B_NOSEG, tss_selector & 0xfffc);
293
294 if (type & 8)
295 tss_limit_max = 103;
2c0262af 296 else
7e84c249
FB		 297 tss_limit_max = 43;
298 tss_limit = get_seg_limit(e1, e2);
299 tss_base = get_seg_base(e1, e2);
300 if ((tss_selector & 4) != 0 ||
301 tss_limit < tss_limit_max)
302 raise_exception_err(EXCP0A_TSS, tss_selector & 0xfffc);
303 old_type = (env->tr.flags >> DESC_TYPE_SHIFT) & 0xf;
304 if (old_type & 8)
305 old_tss_limit_max = 103;
306 else
307 old_tss_limit_max = 43;
308
309 /* read all the registers from the new TSS */
310 if (type & 8) {
311 /* 32 bit */
312 new_cr3 = ldl_kernel(tss_base + 0x1c);
313 new_eip = ldl_kernel(tss_base + 0x20);
314 new_eflags = ldl_kernel(tss_base + 0x24);
315 for(i = 0; i < 8; i++)
316 new_regs[i] = ldl_kernel(tss_base + (0x28 + i * 4));
317 for(i = 0; i < 6; i++)
318 new_segs[i] = lduw_kernel(tss_base + (0x48 + i * 4));
319 new_ldt = lduw_kernel(tss_base + 0x60);
320 new_trap = ldl_kernel(tss_base + 0x64);
321 } else {
322 /* 16 bit */
323 new_cr3 = 0;
324 new_eip = lduw_kernel(tss_base + 0x0e);
325 new_eflags = lduw_kernel(tss_base + 0x10);
326 for(i = 0; i < 8; i++)
327 new_regs[i] = lduw_kernel(tss_base + (0x12 + i * 2)) | 0xffff0000;
328 for(i = 0; i < 4; i++)
329 new_segs[i] = lduw_kernel(tss_base + (0x22 + i * 4));
330 new_ldt = lduw_kernel(tss_base + 0x2a);
331 new_segs[R_FS] = 0;
332 new_segs[R_GS] = 0;
333 new_trap = 0;
334 }
335
336 /* NOTE: we must avoid memory exceptions during the task switch,
337 so we make dummy accesses before */
338 /* XXX: it can still fail in some cases, so a bigger hack is
339 necessary to valid the TLB after having done the accesses */
340
341 v1 = ldub_kernel(env->tr.base);
342 v2 = ldub(env->tr.base + old_tss_limit_max);
343 stb_kernel(env->tr.base, v1);
344 stb_kernel(env->tr.base + old_tss_limit_max, v2);
345
346 /* clear busy bit (it is restartable) */
347 if (source == SWITCH_TSS_JMP || source == SWITCH_TSS_IRET) {
14ce26e7 348 target_ulong ptr;
7e84c249 349 uint32_t e2;
883da8e2 350 ptr = env->gdt.base + (env->tr.selector & ~7);
7e84c249
FB		 351 e2 = ldl_kernel(ptr + 4);
352 e2 &= ~DESC_TSS_BUSY_MASK;
353 stl_kernel(ptr + 4, e2);
354 }
355 old_eflags = compute_eflags();
356 if (source == SWITCH_TSS_IRET)
357 old_eflags &= ~NT_MASK;
358
359 /* save the current state in the old TSS */
360 if (type & 8) {
361 /* 32 bit */
883da8e2 362 stl_kernel(env->tr.base + 0x20, next_eip);
7e84c249 363 stl_kernel(env->tr.base + 0x24, old_eflags);
0d1a29f9
FB		 364 stl_kernel(env->tr.base + (0x28 + 0 * 4), EAX);
365 stl_kernel(env->tr.base + (0x28 + 1 * 4), ECX);
366 stl_kernel(env->tr.base + (0x28 + 2 * 4), EDX);
367 stl_kernel(env->tr.base + (0x28 + 3 * 4), EBX);
368 stl_kernel(env->tr.base + (0x28 + 4 * 4), ESP);
369 stl_kernel(env->tr.base + (0x28 + 5 * 4), EBP);
370 stl_kernel(env->tr.base + (0x28 + 6 * 4), ESI);
371 stl_kernel(env->tr.base + (0x28 + 7 * 4), EDI);
7e84c249
FB		 372 for(i = 0; i < 6; i++)
373 stw_kernel(env->tr.base + (0x48 + i * 4), env->segs[i].selector);
374 } else {
375 /* 16 bit */
883da8e2 376 stw_kernel(env->tr.base + 0x0e, next_eip);
7e84c249 377 stw_kernel(env->tr.base + 0x10, old_eflags);
0d1a29f9
FB		 378 stw_kernel(env->tr.base + (0x12 + 0 * 2), EAX);
379 stw_kernel(env->tr.base + (0x12 + 1 * 2), ECX);
380 stw_kernel(env->tr.base + (0x12 + 2 * 2), EDX);
381 stw_kernel(env->tr.base + (0x12 + 3 * 2), EBX);
382 stw_kernel(env->tr.base + (0x12 + 4 * 2), ESP);
383 stw_kernel(env->tr.base + (0x12 + 5 * 2), EBP);
384 stw_kernel(env->tr.base + (0x12 + 6 * 2), ESI);
385 stw_kernel(env->tr.base + (0x12 + 7 * 2), EDI);
7e84c249
FB		 386 for(i = 0; i < 4; i++)
387 stw_kernel(env->tr.base + (0x22 + i * 4), env->segs[i].selector);
388 }
389
390 /* now if an exception occurs, it will occurs in the next task
391 context */
392
393 if (source == SWITCH_TSS_CALL) {
394 stw_kernel(tss_base, env->tr.selector);
395 new_eflags |= NT_MASK;
396 }
397
398 /* set busy bit */
399 if (source == SWITCH_TSS_JMP || source == SWITCH_TSS_CALL) {
14ce26e7 400 target_ulong ptr;
7e84c249 401 uint32_t e2;
883da8e2 402 ptr = env->gdt.base + (tss_selector & ~7);
7e84c249
FB		 403 e2 = ldl_kernel(ptr + 4);
404 e2 |= DESC_TSS_BUSY_MASK;
405 stl_kernel(ptr + 4, e2);
406 }
407
408 /* set the new CPU state */
409 /* from this point, any exception which occurs can give problems */
410 env->cr[0] |= CR0_TS_MASK;
883da8e2 411 env->hflags |= HF_TS_MASK;
7e84c249
FB		 412 env->tr.selector = tss_selector;
413 env->tr.base = tss_base;
414 env->tr.limit = tss_limit;
415 env->tr.flags = e2 & ~DESC_TSS_BUSY_MASK;
416
417 if ((type & 8) && (env->cr[0] & CR0_PG_MASK)) {
1ac157da 418 cpu_x86_update_cr3(env, new_cr3);
7e84c249
FB		 419 }
420
421 /* load all registers without an exception, then reload them with
422 possible exception */
423 env->eip = new_eip;
4136f33c 424 eflags_mask = TF_MASK | AC_MASK | ID_MASK |
8145122b 425 IF_MASK | IOPL_MASK | VM_MASK | RF_MASK | NT_MASK;
7e84c249
FB		 426 if (!(type & 8))
427 eflags_mask &= 0xffff;
428 load_eflags(new_eflags, eflags_mask);
0d1a29f9
FB		 429 /* XXX: what to do in 16 bit case ? */
430 EAX = new_regs[0];
431 ECX = new_regs[1];
432 EDX = new_regs[2];
433 EBX = new_regs[3];
434 ESP = new_regs[4];
435 EBP = new_regs[5];
436 ESI = new_regs[6];
437 EDI = new_regs[7];
7e84c249
FB		 438 if (new_eflags & VM_MASK) {
439 for(i = 0; i < 6; i++)
440 load_seg_vm(i, new_segs[i]);
441 /* in vm86, CPL is always 3 */
442 cpu_x86_set_cpl(env, 3);
443 } else {
444 /* CPL is set the RPL of CS */
445 cpu_x86_set_cpl(env, new_segs[R_CS] & 3);
446 /* first just selectors as the rest may trigger exceptions */
447 for(i = 0; i < 6; i++)
14ce26e7 448 cpu_x86_load_seg_cache(env, i, new_segs[i], 0, 0, 0);
7e84c249
FB		 449 }
450
451 env->ldt.selector = new_ldt & ~4;
14ce26e7 452 env->ldt.base = 0;
7e84c249
FB		 453 env->ldt.limit = 0;
454 env->ldt.flags = 0;
455
456 /* load the LDT */
457 if (new_ldt & 4)
458 raise_exception_err(EXCP0A_TSS, new_ldt & 0xfffc);
459
8145122b
FB		 460 if ((new_ldt & 0xfffc) != 0) {
461 dt = &env->gdt;
462 index = new_ldt & ~7;
463 if ((index + 7) > dt->limit)
464 raise_exception_err(EXCP0A_TSS, new_ldt & 0xfffc);
465 ptr = dt->base + index;
466 e1 = ldl_kernel(ptr);
467 e2 = ldl_kernel(ptr + 4);
468 if ((e2 & DESC_S_MASK) || ((e2 >> DESC_TYPE_SHIFT) & 0xf) != 2)
469 raise_exception_err(EXCP0A_TSS, new_ldt & 0xfffc);
470 if (!(e2 & DESC_P_MASK))
471 raise_exception_err(EXCP0A_TSS, new_ldt & 0xfffc);
472 load_seg_cache_raw_dt(&env->ldt, e1, e2);
473 }
7e84c249
FB		 474
475 /* load the segments */
476 if (!(new_eflags & VM_MASK)) {
477 tss_load_seg(R_CS, new_segs[R_CS]);
478 tss_load_seg(R_SS, new_segs[R_SS]);
479 tss_load_seg(R_ES, new_segs[R_ES]);
480 tss_load_seg(R_DS, new_segs[R_DS]);
481 tss_load_seg(R_FS, new_segs[R_FS]);
482 tss_load_seg(R_GS, new_segs[R_GS]);
483 }
484
485 /* check that EIP is in the CS segment limits */
486 if (new_eip > env->segs[R_CS].limit) {
883da8e2 487 /* XXX: different exception if CALL ? */
7e84c249
FB		 488 raise_exception_err(EXCP0D_GPF, 0);
489 }
2c0262af 490}
7e84c249
FB		 491
492/* check if Port I/O is allowed in TSS */
493static inline void check_io(int addr, int size)
2c0262af 494{
7e84c249
FB		 495 int io_offset, val, mask;
496
497 /* TSS must be a valid 32 bit one */
498 if (!(env->tr.flags & DESC_P_MASK) ||
499 ((env->tr.flags >> DESC_TYPE_SHIFT) & 0xf) != 9 ||
500 env->tr.limit < 103)
501 goto fail;
502 io_offset = lduw_kernel(env->tr.base + 0x66);
503 io_offset += (addr >> 3);
504 /* Note: the check needs two bytes */
505 if ((io_offset + 1) > env->tr.limit)
506 goto fail;
507 val = lduw_kernel(env->tr.base + io_offset);
508 val >>= (addr & 7);
509 mask = (1 << size) - 1;
510 /* all bits must be zero to allow the I/O */
511 if ((val & mask) != 0) {
512 fail:
513 raise_exception_err(EXCP0D_GPF, 0);
514 }
2c0262af
FB		 515}
516
7e84c249 517void check_iob_T0(void)
2c0262af 518{
7e84c249 519 check_io(T0, 1);
2c0262af
FB		 520}
521
7e84c249 522void check_iow_T0(void)
2c0262af 523{
7e84c249 524 check_io(T0, 2);
2c0262af
FB		 525}
526
7e84c249 527void check_iol_T0(void)
2c0262af 528{
7e84c249
FB		 529 check_io(T0, 4);
530}
531
532void check_iob_DX(void)
533{
534 check_io(EDX & 0xffff, 1);
535}
536
537void check_iow_DX(void)
538{
539 check_io(EDX & 0xffff, 2);
540}
541
542void check_iol_DX(void)
543{
544 check_io(EDX & 0xffff, 4);
2c0262af
FB		 545}
546
891b38e4
FB		 547static inline unsigned int get_sp_mask(unsigned int e2)
548{
549 if (e2 & DESC_B_MASK)
550 return 0xffffffff;
551 else
552 return 0xffff;
553}
554
555/* XXX: add a is_user flag to have proper security support */
556#define PUSHW(ssp, sp, sp_mask, val)\
557{\
558 sp -= 2;\
559 stw_kernel((ssp) + (sp & (sp_mask)), (val));\
560}
561
562#define PUSHL(ssp, sp, sp_mask, val)\
563{\
564 sp -= 4;\
565 stl_kernel((ssp) + (sp & (sp_mask)), (val));\
566}
567
568#define POPW(ssp, sp, sp_mask, val)\
569{\
570 val = lduw_kernel((ssp) + (sp & (sp_mask)));\
571 sp += 2;\
572}
573
574#define POPL(ssp, sp, sp_mask, val)\
575{\
14ce26e7 576 val = (uint32_t)ldl_kernel((ssp) + (sp & (sp_mask)));\
891b38e4
FB		 577 sp += 4;\
578}
579
2c0262af
FB		 580/* protected mode interrupt */
581static void do_interrupt_protected(int intno, int is_int, int error_code,
582 unsigned int next_eip, int is_hw)
583{
584 SegmentCache *dt;
14ce26e7 585 target_ulong ptr, ssp;
891b38e4 586 int type, dpl, selector, ss_dpl, cpl, sp_mask;
2c0262af 587 int has_error_code, new_stack, shift;
891b38e4
FB		 588 uint32_t e1, e2, offset, ss, esp, ss_e1, ss_e2;
589 uint32_t old_eip;
2c0262af 590
7e84c249
FB		 591 has_error_code = 0;
592 if (!is_int && !is_hw) {
593 switch(intno) {
594 case 8:
595 case 10:
596 case 11:
597 case 12:
598 case 13:
599 case 14:
600 case 17:
601 has_error_code = 1;
602 break;
603 }
604 }
883da8e2
FB		 605 if (is_int)
606 old_eip = next_eip;
607 else
608 old_eip = env->eip;
7e84c249 609
2c0262af
FB		 610 dt = &env->idt;
611 if (intno * 8 + 7 > dt->limit)
612 raise_exception_err(EXCP0D_GPF, intno * 8 + 2);
613 ptr = dt->base + intno * 8;
61382a50
FB		 614 e1 = ldl_kernel(ptr);
615 e2 = ldl_kernel(ptr + 4);
2c0262af
FB		 616 /* check gate type */
617 type = (e2 >> DESC_TYPE_SHIFT) & 0x1f;
618 switch(type) {
619 case 5: /* task gate */
7e84c249
FB		 620 /* must do that check here to return the correct error code */
621 if (!(e2 & DESC_P_MASK))
622 raise_exception_err(EXCP0B_NOSEG, intno * 8 + 2);
883da8e2 623 switch_tss(intno * 8, e1, e2, SWITCH_TSS_CALL, old_eip);
7e84c249
FB		 624 if (has_error_code) {
625 int mask;
626 /* push the error code */
627 shift = (env->segs[R_CS].flags >> DESC_B_SHIFT) & 1;
628 if (env->segs[R_SS].flags & DESC_B_MASK)
629 mask = 0xffffffff;
630 else
631 mask = 0xffff;
0d1a29f9 632 esp = (ESP - (2 << shift)) & mask;
7e84c249
FB		 633 ssp = env->segs[R_SS].base + esp;
634 if (shift)
635 stl_kernel(ssp, error_code);
636 else
637 stw_kernel(ssp, error_code);
0d1a29f9 638 ESP = (esp & mask) | (ESP & ~mask);
7e84c249
FB		 639 }
640 return;
2c0262af
FB		 641 case 6: /* 286 interrupt gate */
642 case 7: /* 286 trap gate */
643 case 14: /* 386 interrupt gate */
644 case 15: /* 386 trap gate */
645 break;
646 default:
647 raise_exception_err(EXCP0D_GPF, intno * 8 + 2);
648 break;
649 }
650 dpl = (e2 >> DESC_DPL_SHIFT) & 3;
651 cpl = env->hflags & HF_CPL_MASK;
652 /* check privledge if software int */
653 if (is_int && dpl < cpl)
654 raise_exception_err(EXCP0D_GPF, intno * 8 + 2);
655 /* check valid bit */
656 if (!(e2 & DESC_P_MASK))
657 raise_exception_err(EXCP0B_NOSEG, intno * 8 + 2);
658 selector = e1 >> 16;
659 offset = (e2 & 0xffff0000) | (e1 & 0x0000ffff);
660 if ((selector & 0xfffc) == 0)
661 raise_exception_err(EXCP0D_GPF, 0);
662
663 if (load_segment(&e1, &e2, selector) != 0)
664 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
665 if (!(e2 & DESC_S_MASK) || !(e2 & (DESC_CS_MASK)))
666 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
667 dpl = (e2 >> DESC_DPL_SHIFT) & 3;
668 if (dpl > cpl)
669 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
670 if (!(e2 & DESC_P_MASK))
671 raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc);
672 if (!(e2 & DESC_C_MASK) && dpl < cpl) {
673 /* to inner priviledge */
674 get_ss_esp_from_tss(&ss, &esp, dpl);
675 if ((ss & 0xfffc) == 0)
676 raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
677 if ((ss & 3) != dpl)
678 raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
679 if (load_segment(&ss_e1, &ss_e2, ss) != 0)
680 raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
681 ss_dpl = (ss_e2 >> DESC_DPL_SHIFT) & 3;
682 if (ss_dpl != dpl)
683 raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
684 if (!(ss_e2 & DESC_S_MASK) ||
685 (ss_e2 & DESC_CS_MASK) ||
686 !(ss_e2 & DESC_W_MASK))
687 raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
688 if (!(ss_e2 & DESC_P_MASK))
689 raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
690 new_stack = 1;
891b38e4
FB		 691 sp_mask = get_sp_mask(ss_e2);
692 ssp = get_seg_base(ss_e1, ss_e2);
2c0262af
FB		 693 } else if ((e2 & DESC_C_MASK) || dpl == cpl) {
694 /* to same priviledge */
8e682019
FB		 695 if (env->eflags & VM_MASK)
696 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
2c0262af 697 new_stack = 0;
891b38e4
FB		 698 sp_mask = get_sp_mask(env->segs[R_SS].flags);
699 ssp = env->segs[R_SS].base;
700 esp = ESP;
4796f5e9 701 dpl = cpl;
2c0262af
FB		 702 } else {
703 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
704 new_stack = 0; /* avoid warning */
891b38e4 705 sp_mask = 0; /* avoid warning */
14ce26e7 706 ssp = 0; /* avoid warning */
891b38e4 707 esp = 0; /* avoid warning */
2c0262af
FB		 708 }
709
710 shift = type >> 3;
891b38e4
FB		 711
712#if 0
713 /* XXX: check that enough room is available */
2c0262af
FB		 714 push_size = 6 + (new_stack << 2) + (has_error_code << 1);
715 if (env->eflags & VM_MASK)
716 push_size += 8;
717 push_size <<= shift;
891b38e4 718#endif
2c0262af 719 if (shift == 1) {
2c0262af 720 if (new_stack) {
8e682019
FB		 721 if (env->eflags & VM_MASK) {
722 PUSHL(ssp, esp, sp_mask, env->segs[R_GS].selector);
723 PUSHL(ssp, esp, sp_mask, env->segs[R_FS].selector);
724 PUSHL(ssp, esp, sp_mask, env->segs[R_DS].selector);
725 PUSHL(ssp, esp, sp_mask, env->segs[R_ES].selector);
726 }
891b38e4
FB		 727 PUSHL(ssp, esp, sp_mask, env->segs[R_SS].selector);
728 PUSHL(ssp, esp, sp_mask, ESP);
2c0262af 729 }
891b38e4
FB		 730 PUSHL(ssp, esp, sp_mask, compute_eflags());
731 PUSHL(ssp, esp, sp_mask, env->segs[R_CS].selector);
732 PUSHL(ssp, esp, sp_mask, old_eip);
2c0262af 733 if (has_error_code) {
891b38e4 734 PUSHL(ssp, esp, sp_mask, error_code);
2c0262af
FB		 735 }
736 } else {
737 if (new_stack) {
8e682019
FB		 738 if (env->eflags & VM_MASK) {
739 PUSHW(ssp, esp, sp_mask, env->segs[R_GS].selector);
740 PUSHW(ssp, esp, sp_mask, env->segs[R_FS].selector);
741 PUSHW(ssp, esp, sp_mask, env->segs[R_DS].selector);
742 PUSHW(ssp, esp, sp_mask, env->segs[R_ES].selector);
743 }
891b38e4
FB		 744 PUSHW(ssp, esp, sp_mask, env->segs[R_SS].selector);
745 PUSHW(ssp, esp, sp_mask, ESP);
2c0262af 746 }
891b38e4
FB		 747 PUSHW(ssp, esp, sp_mask, compute_eflags());
748 PUSHW(ssp, esp, sp_mask, env->segs[R_CS].selector);
749 PUSHW(ssp, esp, sp_mask, old_eip);
2c0262af 750 if (has_error_code) {
891b38e4 751 PUSHW(ssp, esp, sp_mask, error_code);
2c0262af
FB		 752 }
753 }
754
891b38e4 755 if (new_stack) {
8e682019 756 if (env->eflags & VM_MASK) {
14ce26e7
FB		 757 cpu_x86_load_seg_cache(env, R_ES, 0, 0, 0, 0);
758 cpu_x86_load_seg_cache(env, R_DS, 0, 0, 0, 0);
759 cpu_x86_load_seg_cache(env, R_FS, 0, 0, 0, 0);
760 cpu_x86_load_seg_cache(env, R_GS, 0, 0, 0, 0);
8e682019 761 }
891b38e4
FB		 762 ss = (ss & ~3) | dpl;
763 cpu_x86_load_seg_cache(env, R_SS, ss,
764 ssp, get_seg_limit(ss_e1, ss_e2), ss_e2);
765 }
766 ESP = (ESP & ~sp_mask) | (esp & sp_mask);
767
768 selector = (selector & ~3) | dpl;
769 cpu_x86_load_seg_cache(env, R_CS, selector,
770 get_seg_base(e1, e2),
771 get_seg_limit(e1, e2),
772 e2);
773 cpu_x86_set_cpl(env, dpl);
774 env->eip = offset;
775
2c0262af
FB		 776 /* interrupt gate clear IF mask */
777 if ((type & 1) == 0) {
778 env->eflags &= ~IF_MASK;
779 }
780 env->eflags &= ~(TF_MASK | VM_MASK | RF_MASK | NT_MASK);
781}
782
14ce26e7
FB		 783#ifdef TARGET_X86_64
784
785#define PUSHQ(sp, val)\
786{\
787 sp -= 8;\
788 stq_kernel(sp, (val));\
789}
790
791#define POPQ(sp, val)\
792{\
793 val = ldq_kernel(sp);\
794 sp += 8;\
795}
796
797static inline target_ulong get_rsp_from_tss(int level)
798{
799 int index;
800
801#if 0
802 printf("TR: base=" TARGET_FMT_lx " limit=%x\n",
803 env->tr.base, env->tr.limit);
804#endif
805
806 if (!(env->tr.flags & DESC_P_MASK))
807 cpu_abort(env, "invalid tss");
808 index = 8 * level + 4;
809 if ((index + 7) > env->tr.limit)
810 raise_exception_err(EXCP0A_TSS, env->tr.selector & 0xfffc);
811 return ldq_kernel(env->tr.base + index);
812}
813
814/* 64 bit interrupt */
815static void do_interrupt64(int intno, int is_int, int error_code,
816 target_ulong next_eip, int is_hw)
817{
818 SegmentCache *dt;
819 target_ulong ptr;
820 int type, dpl, selector, cpl, ist;
821 int has_error_code, new_stack;
822 uint32_t e1, e2, e3, ss;
823 target_ulong old_eip, esp, offset;
824
825 has_error_code = 0;
826 if (!is_int && !is_hw) {
827 switch(intno) {
828 case 8:
829 case 10:
830 case 11:
831 case 12:
832 case 13:
833 case 14:
834 case 17:
835 has_error_code = 1;
836 break;
837 }
838 }
839 if (is_int)
840 old_eip = next_eip;
841 else
842 old_eip = env->eip;
843
844 dt = &env->idt;
845 if (intno * 16 + 15 > dt->limit)
846 raise_exception_err(EXCP0D_GPF, intno * 16 + 2);
847 ptr = dt->base + intno * 16;
848 e1 = ldl_kernel(ptr);
849 e2 = ldl_kernel(ptr + 4);
850 e3 = ldl_kernel(ptr + 8);
851 /* check gate type */
852 type = (e2 >> DESC_TYPE_SHIFT) & 0x1f;
853 switch(type) {
854 case 14: /* 386 interrupt gate */
855 case 15: /* 386 trap gate */
856 break;
857 default:
858 raise_exception_err(EXCP0D_GPF, intno * 16 + 2);
859 break;
860 }
861 dpl = (e2 >> DESC_DPL_SHIFT) & 3;
862 cpl = env->hflags & HF_CPL_MASK;
863 /* check privledge if software int */
864 if (is_int && dpl < cpl)
865 raise_exception_err(EXCP0D_GPF, intno * 16 + 2);
866 /* check valid bit */
867 if (!(e2 & DESC_P_MASK))
868 raise_exception_err(EXCP0B_NOSEG, intno * 16 + 2);
869 selector = e1 >> 16;
870 offset = ((target_ulong)e3 << 32) | (e2 & 0xffff0000) | (e1 & 0x0000ffff);
871 ist = e2 & 7;
872 if ((selector & 0xfffc) == 0)
873 raise_exception_err(EXCP0D_GPF, 0);
874
875 if (load_segment(&e1, &e2, selector) != 0)
876 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
877 if (!(e2 & DESC_S_MASK) || !(e2 & (DESC_CS_MASK)))
878 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
879 dpl = (e2 >> DESC_DPL_SHIFT) & 3;
880 if (dpl > cpl)
881 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
882 if (!(e2 & DESC_P_MASK))
883 raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc);
884 if (!(e2 & DESC_L_MASK) || (e2 & DESC_B_MASK))
885 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
886 if ((!(e2 & DESC_C_MASK) && dpl < cpl) || ist != 0) {
887 /* to inner priviledge */
888 if (ist != 0)
889 esp = get_rsp_from_tss(ist + 3);
890 else
891 esp = get_rsp_from_tss(dpl);
892 ss = 0;
893 new_stack = 1;
894 } else if ((e2 & DESC_C_MASK) || dpl == cpl) {
895 /* to same priviledge */
896 if (env->eflags & VM_MASK)
897 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
898 new_stack = 0;
899 esp = ESP & ~0xf; /* align stack */
900 dpl = cpl;
901 } else {
902 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
903 new_stack = 0; /* avoid warning */
904 esp = 0; /* avoid warning */
905 }
906
907 PUSHQ(esp, env->segs[R_SS].selector);
908 PUSHQ(esp, ESP);
909 PUSHQ(esp, compute_eflags());
910 PUSHQ(esp, env->segs[R_CS].selector);
911 PUSHQ(esp, old_eip);
912 if (has_error_code) {
913 PUSHQ(esp, error_code);
914 }
915
916 if (new_stack) {
917 ss = 0 | dpl;
918 cpu_x86_load_seg_cache(env, R_SS, ss, 0, 0, 0);
919 }
920 ESP = esp;
921
922 selector = (selector & ~3) | dpl;
923 cpu_x86_load_seg_cache(env, R_CS, selector,
924 get_seg_base(e1, e2),
925 get_seg_limit(e1, e2),
926 e2);
927 cpu_x86_set_cpl(env, dpl);
928 env->eip = offset;
929
930 /* interrupt gate clear IF mask */
931 if ((type & 1) == 0) {
932 env->eflags &= ~IF_MASK;
933 }
934 env->eflags &= ~(TF_MASK | VM_MASK | RF_MASK | NT_MASK);
935}
936
06c2f506 937void helper_syscall(int next_eip_addend)
14ce26e7
FB		 938{
939 int selector;
940
941 if (!(env->efer & MSR_EFER_SCE)) {
942 raise_exception_err(EXCP06_ILLOP, 0);
943 }
944 selector = (env->star >> 32) & 0xffff;
945 if (env->hflags & HF_LMA_MASK) {
06c2f506 946 ECX = env->eip + next_eip_addend;
14ce26e7
FB		 947 env->regs[11] = compute_eflags();
948
949 cpu_x86_set_cpl(env, 0);
950 cpu_x86_load_seg_cache(env, R_CS, selector & 0xfffc,
951 0, 0xffffffff,
952 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK |
953 DESC_S_MASK |
954 DESC_CS_MASK | DESC_R_MASK | DESC_A_MASK | DESC_L_MASK);
955 cpu_x86_load_seg_cache(env, R_SS, (selector + 8) & 0xfffc,
956 0, 0xffffffff,
957 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK |
958 DESC_S_MASK |
959 DESC_W_MASK | DESC_A_MASK);
960 env->eflags &= ~env->fmask;
961 if (env->hflags & HF_CS64_MASK)
962 env->eip = env->lstar;
963 else
964 env->eip = env->cstar;
965 } else {
06c2f506 966 ECX = (uint32_t)(env->eip + next_eip_addend);
14ce26e7
FB		 967
968 cpu_x86_set_cpl(env, 0);
969 cpu_x86_load_seg_cache(env, R_CS, selector & 0xfffc,
970 0, 0xffffffff,
971 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK |
972 DESC_S_MASK |
973 DESC_CS_MASK | DESC_R_MASK | DESC_A_MASK);
974 cpu_x86_load_seg_cache(env, R_SS, (selector + 8) & 0xfffc,
975 0, 0xffffffff,
976 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK |
977 DESC_S_MASK |
978 DESC_W_MASK | DESC_A_MASK);
979 env->eflags &= ~(IF_MASK | RF_MASK | VM_MASK);
980 env->eip = (uint32_t)env->star;
981 }
982}
983
984void helper_sysret(int dflag)
985{
986 int cpl, selector;
987
988 cpl = env->hflags & HF_CPL_MASK;
989 if (!(env->cr[0] & CR0_PE_MASK) || cpl != 0) {
990 raise_exception_err(EXCP0D_GPF, 0);
991 }
992 selector = (env->star >> 48) & 0xffff;
993 if (env->hflags & HF_LMA_MASK) {
994 if (dflag == 2) {
995 cpu_x86_load_seg_cache(env, R_CS, (selector + 16) | 3,
996 0, 0xffffffff,
997 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK |
998 DESC_S_MASK | (3 << DESC_DPL_SHIFT) |
999 DESC_CS_MASK | DESC_R_MASK | DESC_A_MASK |
1000 DESC_L_MASK);
1001 env->eip = ECX;
1002 } else {
1003 cpu_x86_load_seg_cache(env, R_CS, selector | 3,
1004 0, 0xffffffff,
1005 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK |
1006 DESC_S_MASK | (3 << DESC_DPL_SHIFT) |
1007 DESC_CS_MASK | DESC_R_MASK | DESC_A_MASK);
1008 env->eip = (uint32_t)ECX;
1009 }
1010 cpu_x86_load_seg_cache(env, R_SS, selector + 8,
1011 0, 0xffffffff,
1012 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK |
1013 DESC_S_MASK | (3 << DESC_DPL_SHIFT) |
1014 DESC_W_MASK | DESC_A_MASK);
31313213
FB		 1015 load_eflags((uint32_t)(env->regs[11]), TF_MASK | AC_MASK | ID_MASK |
1016 IF_MASK | IOPL_MASK | VM_MASK | RF_MASK | NT_MASK);
14ce26e7
FB		 1017 cpu_x86_set_cpl(env, 3);
1018 } else {
1019 cpu_x86_load_seg_cache(env, R_CS, selector | 3,
1020 0, 0xffffffff,
1021 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK |
1022 DESC_S_MASK | (3 << DESC_DPL_SHIFT) |
1023 DESC_CS_MASK | DESC_R_MASK | DESC_A_MASK);
1024 env->eip = (uint32_t)ECX;
1025 cpu_x86_load_seg_cache(env, R_SS, selector + 8,
1026 0, 0xffffffff,
1027 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK |
1028 DESC_S_MASK | (3 << DESC_DPL_SHIFT) |
1029 DESC_W_MASK | DESC_A_MASK);
1030 env->eflags |= IF_MASK;
1031 cpu_x86_set_cpl(env, 3);
1032 }
1033}
1034#endif
1035
2c0262af
FB		 1036/* real mode interrupt */
1037static void do_interrupt_real(int intno, int is_int, int error_code,
4136f33c 1038 unsigned int next_eip)
2c0262af
FB		 1039{
1040 SegmentCache *dt;
14ce26e7 1041 target_ulong ptr, ssp;
2c0262af
FB		 1042 int selector;
1043 uint32_t offset, esp;
1044 uint32_t old_cs, old_eip;
1045
1046 /* real mode (simpler !) */
1047 dt = &env->idt;
1048 if (intno * 4 + 3 > dt->limit)
1049 raise_exception_err(EXCP0D_GPF, intno * 8 + 2);
1050 ptr = dt->base + intno * 4;
61382a50
FB		 1051 offset = lduw_kernel(ptr);
1052 selector = lduw_kernel(ptr + 2);
2c0262af
FB		 1053 esp = ESP;
1054 ssp = env->segs[R_SS].base;
1055 if (is_int)
1056 old_eip = next_eip;
1057 else
1058 old_eip = env->eip;
1059 old_cs = env->segs[R_CS].selector;
891b38e4
FB		 1060 /* XXX: use SS segment size ? */
1061 PUSHW(ssp, esp, 0xffff, compute_eflags());
1062 PUSHW(ssp, esp, 0xffff, old_cs);
1063 PUSHW(ssp, esp, 0xffff, old_eip);
2c0262af
FB		 1064
1065 /* update processor state */
1066 ESP = (ESP & ~0xffff) | (esp & 0xffff);
1067 env->eip = offset;
1068 env->segs[R_CS].selector = selector;
14ce26e7 1069 env->segs[R_CS].base = (selector << 4);
2c0262af
FB		 1070 env->eflags &= ~(IF_MASK | TF_MASK | AC_MASK | RF_MASK);
1071}
1072
1073/* fake user mode interrupt */
1074void do_interrupt_user(int intno, int is_int, int error_code,
14ce26e7 1075 target_ulong next_eip)
2c0262af
FB		 1076{
1077 SegmentCache *dt;
14ce26e7 1078 target_ulong ptr;
2c0262af
FB		 1079 int dpl, cpl;
1080 uint32_t e2;
1081
1082 dt = &env->idt;
1083 ptr = dt->base + (intno * 8);
61382a50 1084 e2 = ldl_kernel(ptr + 4);
2c0262af
FB		 1085
1086 dpl = (e2 >> DESC_DPL_SHIFT) & 3;
1087 cpl = env->hflags & HF_CPL_MASK;
1088 /* check privledge if software int */
1089 if (is_int && dpl < cpl)
1090 raise_exception_err(EXCP0D_GPF, intno * 8 + 2);
1091
1092 /* Since we emulate only user space, we cannot do more than
1093 exiting the emulation with the suitable exception and error
1094 code */
1095 if (is_int)
1096 EIP = next_eip;
1097}
1098
1099/*
e19e89a5 1100 * Begin execution of an interruption. is_int is TRUE if coming from
2c0262af
FB		 1101 * the int instruction. next_eip is the EIP value AFTER the interrupt
1102 * instruction. It is only relevant if is_int is TRUE.
1103 */
1104void do_interrupt(int intno, int is_int, int error_code,
14ce26e7 1105 target_ulong next_eip, int is_hw)
2c0262af 1106{
e19e89a5
FB		 1107#ifdef DEBUG_PCALL
1108 if (loglevel & (CPU_LOG_PCALL | CPU_LOG_INT)) {
1109 if ((env->cr[0] & CR0_PE_MASK)) {
1110 static int count;
14ce26e7 1111 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,
dc6f57fd
FB		 1112 count, intno, error_code, is_int,
1113 env->hflags & HF_CPL_MASK,
1114 env->segs[R_CS].selector, EIP,
2ee73ac3 1115 (int)env->segs[R_CS].base + EIP,
8145122b
FB		 1116 env->segs[R_SS].selector, ESP);
1117 if (intno == 0x0e) {
14ce26e7 1118 fprintf(logfile, " CR2=" TARGET_FMT_lx, env->cr[2]);
8145122b 1119 } else {
14ce26e7 1120 fprintf(logfile, " EAX=" TARGET_FMT_lx, EAX);
8145122b 1121 }
e19e89a5 1122 fprintf(logfile, "\n");
14ce26e7 1123#if 0
06c2f506 1124 cpu_dump_state(env, logfile, fprintf, X86_DUMP_CCOP);
e19e89a5
FB		 1125 {
1126 int i;
1127 uint8_t *ptr;
1128 fprintf(logfile, " code=");
1129 ptr = env->segs[R_CS].base + env->eip;
1130 for(i = 0; i < 16; i++) {
1131 fprintf(logfile, " %02x", ldub(ptr + i));
dc6f57fd 1132 }
e19e89a5 1133 fprintf(logfile, "\n");
dc6f57fd 1134 }
8e682019 1135#endif
e19e89a5 1136 count++;
4136f33c 1137 }
4136f33c
FB		 1138 }
1139#endif
2c0262af 1140 if (env->cr[0] & CR0_PE_MASK) {
14ce26e7
FB		 1141#if TARGET_X86_64
1142 if (env->hflags & HF_LMA_MASK) {
1143 do_interrupt64(intno, is_int, error_code, next_eip, is_hw);
1144 } else
1145#endif
1146 {
1147 do_interrupt_protected(intno, is_int, error_code, next_eip, is_hw);
1148 }
2c0262af
FB		 1149 } else {
1150 do_interrupt_real(intno, is_int, error_code, next_eip);
1151 }
1152}
1153
1154/*
1155 * Signal an interruption. It is executed in the main CPU loop.
1156 * is_int is TRUE if coming from the int instruction. next_eip is the
1157 * EIP value AFTER the interrupt instruction. It is only relevant if
1158 * is_int is TRUE.
1159 */
1160void raise_interrupt(int intno, int is_int, int error_code,
a8ede8ba 1161 int next_eip_addend)
2c0262af
FB		 1162{
1163 env->exception_index = intno;
1164 env->error_code = error_code;
1165 env->exception_is_int = is_int;
a8ede8ba 1166 env->exception_next_eip = env->eip + next_eip_addend;
2c0262af
FB		 1167 cpu_loop_exit();
1168}
1169
0d1a29f9
FB		 1170/* same as raise_exception_err, but do not restore global registers */
1171static void raise_exception_err_norestore(int exception_index, int error_code)
1172{
1173 env->exception_index = exception_index;
1174 env->error_code = error_code;
1175 env->exception_is_int = 0;
1176 env->exception_next_eip = 0;
1177 longjmp(env->jmp_env, 1);
1178}
1179
2c0262af 1180/* shortcuts to generate exceptions */
8145122b
FB		 1181
1182void (raise_exception_err)(int exception_index, int error_code)
2c0262af
FB		 1183{
1184 raise_interrupt(exception_index, 0, error_code, 0);
1185}
1186
1187void raise_exception(int exception_index)
1188{
1189 raise_interrupt(exception_index, 0, 0, 0);
1190}
1191
1192#ifdef BUGGY_GCC_DIV64
1193/* gcc 2.95.4 on PowerPC does not seem to like using __udivdi3, so we
1194 call it from another function */
14ce26e7 1195uint32_t div32(uint32_t *q_ptr, uint64_t num, uint32_t den)
2c0262af
FB		 1196{
1197 *q_ptr = num / den;
1198 return num % den;
1199}
1200
14ce26e7 1201int32_t idiv32(int32_t *q_ptr, int64_t num, int32_t den)
2c0262af
FB		 1202{
1203 *q_ptr = num / den;
1204 return num % den;
1205}
1206#endif
1207
14ce26e7 1208void helper_divl_EAX_T0(void)
2c0262af
FB		 1209{
1210 unsigned int den, q, r;
1211 uint64_t num;
1212
31313213 1213 num = ((uint32_t)EAX) | ((uint64_t)((uint32_t)EDX) << 32);
2c0262af
FB		 1214 den = T0;
1215 if (den == 0) {
2c0262af
FB		 1216 raise_exception(EXCP00_DIVZ);
1217 }
1218#ifdef BUGGY_GCC_DIV64
14ce26e7 1219 r = div32(&q, num, den);
2c0262af
FB		 1220#else
1221 q = (num / den);
1222 r = (num % den);
1223#endif
14ce26e7
FB		 1224 EAX = (uint32_t)q;
1225 EDX = (uint32_t)r;
2c0262af
FB		 1226}
1227
14ce26e7 1228void helper_idivl_EAX_T0(void)
2c0262af
FB		 1229{
1230 int den, q, r;
1231 int64_t num;
1232
31313213 1233 num = ((uint32_t)EAX) | ((uint64_t)((uint32_t)EDX) << 32);
2c0262af
FB		 1234 den = T0;
1235 if (den == 0) {
2c0262af
FB		 1236 raise_exception(EXCP00_DIVZ);
1237 }
1238#ifdef BUGGY_GCC_DIV64
14ce26e7 1239 r = idiv32(&q, num, den);
2c0262af
FB		 1240#else
1241 q = (num / den);
1242 r = (num % den);
1243#endif
14ce26e7
FB		 1244 EAX = (uint32_t)q;
1245 EDX = (uint32_t)r;
2c0262af
FB		 1246}
1247
1248void helper_cmpxchg8b(void)
1249{
1250 uint64_t d;
1251 int eflags;
1252
1253 eflags = cc_table[CC_OP].compute_all();
14ce26e7 1254 d = ldq(A0);
2c0262af 1255 if (d == (((uint64_t)EDX << 32) | EAX)) {
14ce26e7 1256 stq(A0, ((uint64_t)ECX << 32) | EBX);
2c0262af
FB		 1257 eflags |= CC_Z;
1258 } else {
1259 EDX = d >> 32;
1260 EAX = d;
1261 eflags &= ~CC_Z;
1262 }
1263 CC_SRC = eflags;
1264}
1265
2c0262af
FB		 1266void helper_cpuid(void)
1267{
14ce26e7 1268 switch((uint32_t)EAX) {
8e682019
FB		 1269 case 0:
1270 EAX = 2; /* max EAX index supported */
14ce26e7
FB		 1271 EBX = env->cpuid_vendor1;
1272 EDX = env->cpuid_vendor2;
1273 ECX = env->cpuid_vendor3;
8e682019
FB		 1274 break;
1275 case 1:
14ce26e7
FB		 1276 EAX = env->cpuid_version;
1277 EBX = 0;
9df217a3 1278 ECX = env->cpuid_ext_features;
14ce26e7 1279 EDX = env->cpuid_features;
8e682019
FB		 1280 break;
1281 default:
1282 /* cache info: needed for Pentium Pro compatibility */
1283 EAX = 0x410601;
2c0262af
FB		 1284 EBX = 0;
1285 ECX = 0;
8e682019
FB		 1286 EDX = 0;
1287 break;
14ce26e7
FB		 1288#ifdef TARGET_X86_64
1289 case 0x80000000:
1290 EAX = 0x80000008;
1291 EBX = env->cpuid_vendor1;
1292 EDX = env->cpuid_vendor2;
1293 ECX = env->cpuid_vendor3;
1294 break;
1295 case 0x80000001:
1296 EAX = env->cpuid_features;
1297 EBX = 0;
1298 ECX = 0;
1299 /* long mode + syscall/sysret features */
1300 EDX = (env->cpuid_features & 0x0183F3FF) | (1 << 29) | (1 << 11);
1301 break;
1302 case 0x80000008:
1303 /* virtual & phys address size in low 2 bytes. */
1304 EAX = 0x00003028;
1305 EBX = 0;
1306 ECX = 0;
1307 EDX = 0;
1308 break;
1309#endif
2c0262af
FB		 1310 }
1311}
1312
61a8c4ec
FB		 1313void helper_enter_level(int level, int data32)
1314{
14ce26e7 1315 target_ulong ssp;
61a8c4ec
FB		 1316 uint32_t esp_mask, esp, ebp;
1317
1318 esp_mask = get_sp_mask(env->segs[R_SS].flags);
1319 ssp = env->segs[R_SS].base;
1320 ebp = EBP;
1321 esp = ESP;
1322 if (data32) {
1323 /* 32 bit */
1324 esp -= 4;
1325 while (--level) {
1326 esp -= 4;
1327 ebp -= 4;
1328 stl(ssp + (esp & esp_mask), ldl(ssp + (ebp & esp_mask)));
1329 }
1330 esp -= 4;
1331 stl(ssp + (esp & esp_mask), T1);
1332 } else {
1333 /* 16 bit */
1334 esp -= 2;
1335 while (--level) {
1336 esp -= 2;
1337 ebp -= 2;
1338 stw(ssp + (esp & esp_mask), lduw(ssp + (ebp & esp_mask)));
1339 }
1340 esp -= 2;
1341 stw(ssp + (esp & esp_mask), T1);
1342 }
1343}
1344
2c0262af
FB		 1345void helper_lldt_T0(void)
1346{
1347 int selector;
1348 SegmentCache *dt;
1349 uint32_t e1, e2;
14ce26e7
FB		 1350 int index, entry_limit;
1351 target_ulong ptr;
2c0262af
FB		 1352
1353 selector = T0 & 0xffff;
1354 if ((selector & 0xfffc) == 0) {
1355 /* XXX: NULL selector case: invalid LDT */
14ce26e7 1356 env->ldt.base = 0;
2c0262af
FB		 1357 env->ldt.limit = 0;
1358 } else {
1359 if (selector & 0x4)
1360 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
1361 dt = &env->gdt;
1362 index = selector & ~7;
14ce26e7
FB		 1363#ifdef TARGET_X86_64
1364 if (env->hflags & HF_LMA_MASK)
1365 entry_limit = 15;
1366 else
1367#endif
1368 entry_limit = 7;
1369 if ((index + entry_limit) > dt->limit)
2c0262af
FB		 1370 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
1371 ptr = dt->base + index;
61382a50
FB		 1372 e1 = ldl_kernel(ptr);
1373 e2 = ldl_kernel(ptr + 4);
2c0262af
FB		 1374 if ((e2 & DESC_S_MASK) || ((e2 >> DESC_TYPE_SHIFT) & 0xf) != 2)
1375 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
1376 if (!(e2 & DESC_P_MASK))
1377 raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc);
14ce26e7
FB		 1378#ifdef TARGET_X86_64
1379 if (env->hflags & HF_LMA_MASK) {
1380 uint32_t e3;
1381 e3 = ldl_kernel(ptr + 8);
1382 load_seg_cache_raw_dt(&env->ldt, e1, e2);
1383 env->ldt.base |= (target_ulong)e3 << 32;
1384 } else
1385#endif
1386 {
1387 load_seg_cache_raw_dt(&env->ldt, e1, e2);
1388 }
2c0262af
FB		 1389 }
1390 env->ldt.selector = selector;
1391}
1392
1393void helper_ltr_T0(void)
1394{
1395 int selector;
1396 SegmentCache *dt;
1397 uint32_t e1, e2;
14ce26e7
FB		 1398 int index, type, entry_limit;
1399 target_ulong ptr;
2c0262af
FB		 1400
1401 selector = T0 & 0xffff;
1402 if ((selector & 0xfffc) == 0) {
14ce26e7
FB		 1403 /* NULL selector case: invalid TR */
1404 env->tr.base = 0;
2c0262af
FB		 1405 env->tr.limit = 0;
1406 env->tr.flags = 0;
1407 } else {
1408 if (selector & 0x4)
1409 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
1410 dt = &env->gdt;
1411 index = selector & ~7;
14ce26e7
FB		 1412#ifdef TARGET_X86_64
1413 if (env->hflags & HF_LMA_MASK)
1414 entry_limit = 15;
1415 else
1416#endif
1417 entry_limit = 7;
1418 if ((index + entry_limit) > dt->limit)
2c0262af
FB		 1419 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
1420 ptr = dt->base + index;
61382a50
FB		 1421 e1 = ldl_kernel(ptr);
1422 e2 = ldl_kernel(ptr + 4);
2c0262af
FB		 1423 type = (e2 >> DESC_TYPE_SHIFT) & 0xf;
1424 if ((e2 & DESC_S_MASK) ||
7e84c249 1425 (type != 1 && type != 9))
2c0262af
FB		 1426 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
1427 if (!(e2 & DESC_P_MASK))
1428 raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc);
14ce26e7
FB		 1429#ifdef TARGET_X86_64
1430 if (env->hflags & HF_LMA_MASK) {
1431 uint32_t e3;
1432 e3 = ldl_kernel(ptr + 8);
1433 load_seg_cache_raw_dt(&env->tr, e1, e2);
1434 env->tr.base |= (target_ulong)e3 << 32;
1435 } else
1436#endif
1437 {
1438 load_seg_cache_raw_dt(&env->tr, e1, e2);
1439 }
8e682019 1440 e2 |= DESC_TSS_BUSY_MASK;
61382a50 1441 stl_kernel(ptr + 4, e2);
2c0262af
FB		 1442 }
1443 env->tr.selector = selector;
1444}
1445
3ab493de 1446/* only works if protected mode and not VM86. seg_reg must be != R_CS */
8e682019 1447void load_seg(int seg_reg, int selector)
2c0262af
FB		 1448{
1449 uint32_t e1, e2;
3ab493de
FB		 1450 int cpl, dpl, rpl;
1451 SegmentCache *dt;
1452 int index;
14ce26e7 1453 target_ulong ptr;
3ab493de 1454
8e682019 1455 selector &= 0xffff;
2c0262af
FB		 1456 if ((selector & 0xfffc) == 0) {
1457 /* null selector case */
4d6b6c0a
FB		 1458 if (seg_reg == R_SS
1459#ifdef TARGET_X86_64
1460 && !(env->hflags & HF_CS64_MASK)
1461#endif
1462 )
2c0262af 1463 raise_exception_err(EXCP0D_GPF, 0);
14ce26e7 1464 cpu_x86_load_seg_cache(env, seg_reg, selector, 0, 0, 0);
2c0262af 1465 } else {
3ab493de
FB		 1466
1467 if (selector & 0x4)
1468 dt = &env->ldt;
1469 else
1470 dt = &env->gdt;
1471 index = selector & ~7;
8e682019 1472 if ((index + 7) > dt->limit)
2c0262af 1473 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
3ab493de
FB		 1474 ptr = dt->base + index;
1475 e1 = ldl_kernel(ptr);
1476 e2 = ldl_kernel(ptr + 4);
14ce26e7 1477
8e682019 1478 if (!(e2 & DESC_S_MASK))
2c0262af 1479 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
3ab493de
FB		 1480 rpl = selector & 3;
1481 dpl = (e2 >> DESC_DPL_SHIFT) & 3;
1482 cpl = env->hflags & HF_CPL_MASK;
2c0262af 1483 if (seg_reg == R_SS) {
3ab493de 1484 /* must be writable segment */
8e682019 1485 if ((e2 & DESC_CS_MASK) || !(e2 & DESC_W_MASK))
2c0262af 1486 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
8e682019 1487 if (rpl != cpl || dpl != cpl)
3ab493de 1488 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
2c0262af 1489 } else {
3ab493de 1490 /* must be readable segment */
8e682019 1491 if ((e2 & (DESC_CS_MASK | DESC_R_MASK)) == DESC_CS_MASK)
2c0262af 1492 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
3ab493de
FB		 1493
1494 if (!(e2 & DESC_CS_MASK) || !(e2 & DESC_C_MASK)) {
1495 /* if not conforming code, test rights */
8e682019 1496 if (dpl < cpl || dpl < rpl)
3ab493de 1497 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
3ab493de 1498 }
2c0262af
FB		 1499 }
1500
1501 if (!(e2 & DESC_P_MASK)) {
2c0262af
FB		 1502 if (seg_reg == R_SS)
1503 raise_exception_err(EXCP0C_STACK, selector & 0xfffc);
1504 else
1505 raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc);
1506 }
3ab493de
FB		 1507
1508 /* set the access bit if not already set */
1509 if (!(e2 & DESC_A_MASK)) {
1510 e2 |= DESC_A_MASK;
1511 stl_kernel(ptr + 4, e2);
1512 }
1513
2c0262af
FB		 1514 cpu_x86_load_seg_cache(env, seg_reg, selector,
1515 get_seg_base(e1, e2),
1516 get_seg_limit(e1, e2),
1517 e2);
1518#if 0
1519 fprintf(logfile, "load_seg: sel=0x%04x base=0x%08lx limit=0x%08lx flags=%08x\n",
1520 selector, (unsigned long)sc->base, sc->limit, sc->flags);
1521#endif
1522 }
1523}
1524
1525/* protected mode jump */
08cea4ee 1526void helper_ljmp_protected_T0_T1(int next_eip)
2c0262af 1527{
14ce26e7 1528 int new_cs, gate_cs, type;
2c0262af 1529 uint32_t e1, e2, cpl, dpl, rpl, limit;
14ce26e7
FB		 1530 target_ulong new_eip;
1531
2c0262af
FB		 1532 new_cs = T0;
1533 new_eip = T1;
1534 if ((new_cs & 0xfffc) == 0)
1535 raise_exception_err(EXCP0D_GPF, 0);
1536 if (load_segment(&e1, &e2, new_cs) != 0)
1537 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
1538 cpl = env->hflags & HF_CPL_MASK;
1539 if (e2 & DESC_S_MASK) {
1540 if (!(e2 & DESC_CS_MASK))
1541 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
1542 dpl = (e2 >> DESC_DPL_SHIFT) & 3;
7e84c249 1543 if (e2 & DESC_C_MASK) {
2c0262af
FB		 1544 /* conforming code segment */
1545 if (dpl > cpl)
1546 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
1547 } else {
1548 /* non conforming code segment */
1549 rpl = new_cs & 3;
1550 if (rpl > cpl)
1551 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
1552 if (dpl != cpl)
1553 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
1554 }
1555 if (!(e2 & DESC_P_MASK))
1556 raise_exception_err(EXCP0B_NOSEG, new_cs & 0xfffc);
1557 limit = get_seg_limit(e1, e2);
ca954f6d
FB		 1558 if (new_eip > limit &&
1559 !(env->hflags & HF_LMA_MASK) && !(e2 & DESC_L_MASK))
2c0262af
FB		 1560 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
1561 cpu_x86_load_seg_cache(env, R_CS, (new_cs & 0xfffc) | cpl,
1562 get_seg_base(e1, e2), limit, e2);
1563 EIP = new_eip;
1564 } else {
7e84c249
FB		 1565 /* jump to call or task gate */
1566 dpl = (e2 >> DESC_DPL_SHIFT) & 3;
1567 rpl = new_cs & 3;
1568 cpl = env->hflags & HF_CPL_MASK;
1569 type = (e2 >> DESC_TYPE_SHIFT) & 0xf;
1570 switch(type) {
1571 case 1: /* 286 TSS */
1572 case 9: /* 386 TSS */
1573 case 5: /* task gate */
1574 if (dpl < cpl || dpl < rpl)
1575 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
08cea4ee 1576 switch_tss(new_cs, e1, e2, SWITCH_TSS_JMP, next_eip);
7e84c249
FB		 1577 break;
1578 case 4: /* 286 call gate */
1579 case 12: /* 386 call gate */
1580 if ((dpl < cpl) || (dpl < rpl))
1581 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
1582 if (!(e2 & DESC_P_MASK))
1583 raise_exception_err(EXCP0B_NOSEG, new_cs & 0xfffc);
1584 gate_cs = e1 >> 16;
516633dc
FB		 1585 new_eip = (e1 & 0xffff);
1586 if (type == 12)
1587 new_eip |= (e2 & 0xffff0000);
7e84c249
FB		 1588 if (load_segment(&e1, &e2, gate_cs) != 0)
1589 raise_exception_err(EXCP0D_GPF, gate_cs & 0xfffc);
1590 dpl = (e2 >> DESC_DPL_SHIFT) & 3;
1591 /* must be code segment */
1592 if (((e2 & (DESC_S_MASK | DESC_CS_MASK)) !=
1593 (DESC_S_MASK | DESC_CS_MASK)))
1594 raise_exception_err(EXCP0D_GPF, gate_cs & 0xfffc);
14ce26e7 1595 if (((e2 & DESC_C_MASK) && (dpl > cpl)) ||
7e84c249
FB		 1596 (!(e2 & DESC_C_MASK) && (dpl != cpl)))
1597 raise_exception_err(EXCP0D_GPF, gate_cs & 0xfffc);
1598 if (!(e2 & DESC_P_MASK))
1599 raise_exception_err(EXCP0D_GPF, gate_cs & 0xfffc);
7e84c249
FB		 1600 limit = get_seg_limit(e1, e2);
1601 if (new_eip > limit)
1602 raise_exception_err(EXCP0D_GPF, 0);
1603 cpu_x86_load_seg_cache(env, R_CS, (gate_cs & 0xfffc) | cpl,
1604 get_seg_base(e1, e2), limit, e2);
1605 EIP = new_eip;
1606 break;
1607 default:
1608 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
1609 break;
1610 }
2c0262af
FB		 1611 }
1612}
1613
1614/* real mode call */
1615void helper_lcall_real_T0_T1(int shift, int next_eip)
1616{
1617 int new_cs, new_eip;
1618 uint32_t esp, esp_mask;
14ce26e7 1619 target_ulong ssp;
2c0262af
FB		 1620
1621 new_cs = T0;
1622 new_eip = T1;
1623 esp = ESP;
891b38e4 1624 esp_mask = get_sp_mask(env->segs[R_SS].flags);
2c0262af
FB		 1625 ssp = env->segs[R_SS].base;
1626 if (shift) {
891b38e4
FB		 1627 PUSHL(ssp, esp, esp_mask, env->segs[R_CS].selector);
1628 PUSHL(ssp, esp, esp_mask, next_eip);
2c0262af 1629 } else {
891b38e4
FB		 1630 PUSHW(ssp, esp, esp_mask, env->segs[R_CS].selector);
1631 PUSHW(ssp, esp, esp_mask, next_eip);
2c0262af
FB		 1632 }
1633
891b38e4 1634 ESP = (ESP & ~esp_mask) | (esp & esp_mask);
2c0262af
FB		 1635 env->eip = new_eip;
1636 env->segs[R_CS].selector = new_cs;
14ce26e7 1637 env->segs[R_CS].base = (new_cs << 4);
2c0262af
FB		 1638}
1639
1640/* protected mode call */
1641void helper_lcall_protected_T0_T1(int shift, int next_eip)
1642{
891b38e4 1643 int new_cs, new_eip, new_stack, i;
2c0262af 1644 uint32_t e1, e2, cpl, dpl, rpl, selector, offset, param_count;
891b38e4
FB		 1645 uint32_t ss, ss_e1, ss_e2, sp, type, ss_dpl, sp_mask;
1646 uint32_t val, limit, old_sp_mask;
14ce26e7 1647 target_ulong ssp, old_ssp;
2c0262af
FB		 1648
1649 new_cs = T0;
1650 new_eip = T1;
f3f2d9be 1651#ifdef DEBUG_PCALL
e19e89a5
FB		 1652 if (loglevel & CPU_LOG_PCALL) {
1653 fprintf(logfile, "lcall %04x:%08x s=%d\n",
1654 new_cs, new_eip, shift);
7fe48483 1655 cpu_dump_state(env, logfile, fprintf, X86_DUMP_CCOP);
f3f2d9be
FB		 1656 }
1657#endif
2c0262af
FB		 1658 if ((new_cs & 0xfffc) == 0)
1659 raise_exception_err(EXCP0D_GPF, 0);
1660 if (load_segment(&e1, &e2, new_cs) != 0)
1661 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
1662 cpl = env->hflags & HF_CPL_MASK;
f3f2d9be 1663#ifdef DEBUG_PCALL
e19e89a5 1664 if (loglevel & CPU_LOG_PCALL) {
f3f2d9be
FB		 1665 fprintf(logfile, "desc=%08x:%08x\n", e1, e2);
1666 }
1667#endif
2c0262af
FB		 1668 if (e2 & DESC_S_MASK) {
1669 if (!(e2 & DESC_CS_MASK))
1670 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
1671 dpl = (e2 >> DESC_DPL_SHIFT) & 3;
7e84c249 1672 if (e2 & DESC_C_MASK) {
2c0262af
FB		 1673 /* conforming code segment */
1674 if (dpl > cpl)
1675 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
1676 } else {
1677 /* non conforming code segment */
1678 rpl = new_cs & 3;
1679 if (rpl > cpl)
1680 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
1681 if (dpl != cpl)
1682 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
1683 }
1684 if (!(e2 & DESC_P_MASK))
1685 raise_exception_err(EXCP0B_NOSEG, new_cs & 0xfffc);
1686
1687 sp = ESP;
891b38e4
FB		 1688 sp_mask = get_sp_mask(env->segs[R_SS].flags);
1689 ssp = env->segs[R_SS].base;
2c0262af 1690 if (shift) {
891b38e4
FB		 1691 PUSHL(ssp, sp, sp_mask, env->segs[R_CS].selector);
1692 PUSHL(ssp, sp, sp_mask, next_eip);
2c0262af 1693 } else {
891b38e4
FB		 1694 PUSHW(ssp, sp, sp_mask, env->segs[R_CS].selector);
1695 PUSHW(ssp, sp, sp_mask, next_eip);
2c0262af 1696 }
2c0262af
FB		 1697
1698 limit = get_seg_limit(e1, e2);
1699 if (new_eip > limit)
1700 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
1701 /* from this point, not restartable */
891b38e4 1702 ESP = (ESP & ~sp_mask) | (sp & sp_mask);
2c0262af
FB		 1703 cpu_x86_load_seg_cache(env, R_CS, (new_cs & 0xfffc) | cpl,
1704 get_seg_base(e1, e2), limit, e2);
1705 EIP = new_eip;
1706 } else {
1707 /* check gate type */
1708 type = (e2 >> DESC_TYPE_SHIFT) & 0x1f;
7e84c249
FB		 1709 dpl = (e2 >> DESC_DPL_SHIFT) & 3;
1710 rpl = new_cs & 3;
2c0262af
FB		 1711 switch(type) {
1712 case 1: /* available 286 TSS */
1713 case 9: /* available 386 TSS */
1714 case 5: /* task gate */
7e84c249
FB		 1715 if (dpl < cpl || dpl < rpl)
1716 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
883da8e2 1717 switch_tss(new_cs, e1, e2, SWITCH_TSS_CALL, next_eip);
8145122b 1718 return;
2c0262af
FB		 1719 case 4: /* 286 call gate */
1720 case 12: /* 386 call gate */
1721 break;
1722 default:
1723 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
1724 break;
1725 }
1726 shift = type >> 3;
1727
2c0262af
FB		 1728 if (dpl < cpl || dpl < rpl)
1729 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
1730 /* check valid bit */
1731 if (!(e2 & DESC_P_MASK))
1732 raise_exception_err(EXCP0B_NOSEG, new_cs & 0xfffc);
1733 selector = e1 >> 16;
1734 offset = (e2 & 0xffff0000) | (e1 & 0x0000ffff);
f3f2d9be 1735 param_count = e2 & 0x1f;
2c0262af
FB		 1736 if ((selector & 0xfffc) == 0)
1737 raise_exception_err(EXCP0D_GPF, 0);
1738
1739 if (load_segment(&e1, &e2, selector) != 0)
1740 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
1741 if (!(e2 & DESC_S_MASK) || !(e2 & (DESC_CS_MASK)))
1742 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
1743 dpl = (e2 >> DESC_DPL_SHIFT) & 3;
1744 if (dpl > cpl)
1745 raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
1746 if (!(e2 & DESC_P_MASK))
1747 raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc);
1748
1749 if (!(e2 & DESC_C_MASK) && dpl < cpl) {
1750 /* to inner priviledge */
1751 get_ss_esp_from_tss(&ss, &sp, dpl);
f3f2d9be 1752#ifdef DEBUG_PCALL
e19e89a5 1753 if (loglevel & CPU_LOG_PCALL)
14ce26e7 1754 fprintf(logfile, "new ss:esp=%04x:%08x param_count=%d ESP=" TARGET_FMT_lx "\n",
f3f2d9be
FB		 1755 ss, sp, param_count, ESP);
1756#endif
2c0262af
FB		 1757 if ((ss & 0xfffc) == 0)
1758 raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
1759 if ((ss & 3) != dpl)
1760 raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
1761 if (load_segment(&ss_e1, &ss_e2, ss) != 0)
1762 raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
1763 ss_dpl = (ss_e2 >> DESC_DPL_SHIFT) & 3;
1764 if (ss_dpl != dpl)
1765 raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
1766 if (!(ss_e2 & DESC_S_MASK) ||
1767 (ss_e2 & DESC_CS_MASK) ||
1768 !(ss_e2 & DESC_W_MASK))
1769 raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
1770 if (!(ss_e2 & DESC_P_MASK))
1771 raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
1772
891b38e4 1773 // push_size = ((param_count * 2) + 8) << shift;
2c0262af 1774
891b38e4
FB		 1775 old_sp_mask = get_sp_mask(env->segs[R_SS].flags);
1776 old_ssp = env->segs[R_SS].base;
2c0262af 1777
891b38e4
FB		 1778 sp_mask = get_sp_mask(ss_e2);
1779 ssp = get_seg_base(ss_e1, ss_e2);
2c0262af 1780 if (shift) {
891b38e4
FB		 1781 PUSHL(ssp, sp, sp_mask, env->segs[R_SS].selector);
1782 PUSHL(ssp, sp, sp_mask, ESP);
1783 for(i = param_count - 1; i >= 0; i--) {
1784 val = ldl_kernel(old_ssp + ((ESP + i * 4) & old_sp_mask));
1785 PUSHL(ssp, sp, sp_mask, val);
2c0262af
FB		 1786 }
1787 } else {
891b38e4
FB		 1788 PUSHW(ssp, sp, sp_mask, env->segs[R_SS].selector);
1789 PUSHW(ssp, sp, sp_mask, ESP);
1790 for(i = param_count - 1; i >= 0; i--) {
1791 val = lduw_kernel(old_ssp + ((ESP + i * 2) & old_sp_mask));
1792 PUSHW(ssp, sp, sp_mask, val);
2c0262af
FB		 1793 }
1794 }
891b38e4 1795 new_stack = 1;
2c0262af
FB		 1796 } else {
1797 /* to same priviledge */
891b38e4
FB		 1798 sp = ESP;
1799 sp_mask = get_sp_mask(env->segs[R_SS].flags);
1800 ssp = env->segs[R_SS].base;
1801 // push_size = (4 << shift);
1802 new_stack = 0;
2c0262af
FB		 1803 }
1804
1805 if (shift) {
891b38e4
FB		 1806 PUSHL(ssp, sp, sp_mask, env->segs[R_CS].selector);
1807 PUSHL(ssp, sp, sp_mask, next_eip);
2c0262af 1808 } else {
891b38e4
FB		 1809 PUSHW(ssp, sp, sp_mask, env->segs[R_CS].selector);
1810 PUSHW(ssp, sp, sp_mask, next_eip);
1811 }
1812
1813 /* from this point, not restartable */
1814
1815 if (new_stack) {
1816 ss = (ss & ~3) | dpl;
1817 cpu_x86_load_seg_cache(env, R_SS, ss,
1818 ssp,
1819 get_seg_limit(ss_e1, ss_e2),
1820 ss_e2);
2c0262af
FB		 1821 }
1822
2c0262af
FB		 1823 selector = (selector & ~3) | dpl;
1824 cpu_x86_load_seg_cache(env, R_CS, selector,
1825 get_seg_base(e1, e2),
1826 get_seg_limit(e1, e2),
1827 e2);
1828 cpu_x86_set_cpl(env, dpl);
891b38e4 1829 ESP = (ESP & ~sp_mask) | (sp & sp_mask);
2c0262af
FB		 1830 EIP = offset;
1831 }
9df217a3
FB		 1832#ifdef USE_KQEMU
1833 if (kqemu_is_ok(env)) {
1834 env->exception_index = -1;
1835 cpu_loop_exit();
1836 }
1837#endif
2c0262af
FB		 1838}
1839
7e84c249 1840/* real and vm86 mode iret */
2c0262af
FB		 1841void helper_iret_real(int shift)
1842{
891b38e4 1843 uint32_t sp, new_cs, new_eip, new_eflags, sp_mask;
14ce26e7 1844 target_ulong ssp;
2c0262af 1845 int eflags_mask;
7e84c249 1846
891b38e4
FB		 1847 sp_mask = 0xffff; /* XXXX: use SS segment size ? */
1848 sp = ESP;
1849 ssp = env->segs[R_SS].base;
2c0262af
FB		 1850 if (shift == 1) {
1851 /* 32 bits */
891b38e4
FB		 1852 POPL(ssp, sp, sp_mask, new_eip);
1853 POPL(ssp, sp, sp_mask, new_cs);
1854 new_cs &= 0xffff;
1855 POPL(ssp, sp, sp_mask, new_eflags);
2c0262af
FB		 1856 } else {
1857 /* 16 bits */
891b38e4
FB		 1858 POPW(ssp, sp, sp_mask, new_eip);
1859 POPW(ssp, sp, sp_mask, new_cs);
1860 POPW(ssp, sp, sp_mask, new_eflags);
2c0262af 1861 }
4136f33c 1862 ESP = (ESP & ~sp_mask) | (sp & sp_mask);
2c0262af
FB		 1863 load_seg_vm(R_CS, new_cs);
1864 env->eip = new_eip;
7e84c249 1865 if (env->eflags & VM_MASK)
8145122b 1866 eflags_mask = TF_MASK | AC_MASK | ID_MASK | IF_MASK | RF_MASK | NT_MASK;
7e84c249 1867 else
8145122b 1868 eflags_mask = TF_MASK | AC_MASK | ID_MASK | IF_MASK | IOPL_MASK | RF_MASK | NT_MASK;
2c0262af
FB		 1869 if (shift == 0)
1870 eflags_mask &= 0xffff;
1871 load_eflags(new_eflags, eflags_mask);
1872}
1873
8e682019
FB		 1874static inline void validate_seg(int seg_reg, int cpl)
1875{
1876 int dpl;
1877 uint32_t e2;
1878
1879 e2 = env->segs[seg_reg].flags;
1880 dpl = (e2 >> DESC_DPL_SHIFT) & 3;
1881 if (!(e2 & DESC_CS_MASK) || !(e2 & DESC_C_MASK)) {
1882 /* data or non conforming code segment */
1883 if (dpl < cpl) {
14ce26e7 1884 cpu_x86_load_seg_cache(env, seg_reg, 0, 0, 0, 0);
8e682019
FB		 1885 }
1886 }
1887}
1888
2c0262af
FB		 1889/* protected mode iret */
1890static inline void helper_ret_protected(int shift, int is_iret, int addend)
1891{
14ce26e7 1892 uint32_t new_cs, new_eflags, new_ss;
2c0262af
FB		 1893 uint32_t new_es, new_ds, new_fs, new_gs;
1894 uint32_t e1, e2, ss_e1, ss_e2;
4136f33c 1895 int cpl, dpl, rpl, eflags_mask, iopl;
14ce26e7 1896 target_ulong ssp, sp, new_eip, new_esp, sp_mask;
2c0262af 1897
14ce26e7
FB		 1898#ifdef TARGET_X86_64
1899 if (shift == 2)
1900 sp_mask = -1;
1901 else
1902#endif
1903 sp_mask = get_sp_mask(env->segs[R_SS].flags);
2c0262af 1904 sp = ESP;
891b38e4 1905 ssp = env->segs[R_SS].base;
354ff226 1906 new_eflags = 0; /* avoid warning */
14ce26e7
FB		 1907#ifdef TARGET_X86_64
1908 if (shift == 2) {
1909 POPQ(sp, new_eip);
1910 POPQ(sp, new_cs);
1911 new_cs &= 0xffff;
1912 if (is_iret) {
1913 POPQ(sp, new_eflags);
1914 }
1915 } else
1916#endif
2c0262af
FB		 1917 if (shift == 1) {
1918 /* 32 bits */
891b38e4
FB		 1919 POPL(ssp, sp, sp_mask, new_eip);
1920 POPL(ssp, sp, sp_mask, new_cs);
1921 new_cs &= 0xffff;
1922 if (is_iret) {
1923 POPL(ssp, sp, sp_mask, new_eflags);
1924 if (new_eflags & VM_MASK)
1925 goto return_to_vm86;
1926 }
2c0262af
FB		 1927 } else {
1928 /* 16 bits */
891b38e4
FB		 1929 POPW(ssp, sp, sp_mask, new_eip);
1930 POPW(ssp, sp, sp_mask, new_cs);
2c0262af 1931 if (is_iret)
891b38e4 1932 POPW(ssp, sp, sp_mask, new_eflags);
2c0262af 1933 }
891b38e4 1934#ifdef DEBUG_PCALL
e19e89a5 1935 if (loglevel & CPU_LOG_PCALL) {
14ce26e7 1936 fprintf(logfile, "lret new %04x:" TARGET_FMT_lx " s=%d addend=0x%x\n",
e19e89a5 1937 new_cs, new_eip, shift, addend);
7fe48483 1938 cpu_dump_state(env, logfile, fprintf, X86_DUMP_CCOP);
891b38e4
FB		 1939 }
1940#endif
2c0262af
FB		 1941 if ((new_cs & 0xfffc) == 0)
1942 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
1943 if (load_segment(&e1, &e2, new_cs) != 0)
1944 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
1945 if (!(e2 & DESC_S_MASK) ||
1946 !(e2 & DESC_CS_MASK))
1947 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
1948 cpl = env->hflags & HF_CPL_MASK;
1949 rpl = new_cs & 3;
1950 if (rpl < cpl)
1951 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
1952 dpl = (e2 >> DESC_DPL_SHIFT) & 3;
7e84c249 1953 if (e2 & DESC_C_MASK) {
2c0262af
FB		 1954 if (dpl > rpl)
1955 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
1956 } else {
1957 if (dpl != rpl)
1958 raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
1959 }
1960 if (!(e2 & DESC_P_MASK))
1961 raise_exception_err(EXCP0B_NOSEG, new_cs & 0xfffc);
1962
891b38e4 1963 sp += addend;
ca954f6d
FB		 1964 if (rpl == cpl && (!(env->hflags & HF_CS64_MASK) ||
1965 ((env->hflags & HF_CS64_MASK) && !is_iret))) {
2c0262af
FB		 1966 /* return to same priledge level */
1967 cpu_x86_load_seg_cache(env, R_CS, new_cs,
1968 get_seg_base(e1, e2),
1969 get_seg_limit(e1, e2),
1970 e2);
2c0262af
FB		 1971 } else {
1972 /* return to different priviledge level */
14ce26e7
FB		 1973#ifdef TARGET_X86_64
1974 if (shift == 2) {
1975 POPQ(sp, new_esp);
1976 POPQ(sp, new_ss);
1977 new_ss &= 0xffff;
1978 } else
1979#endif
2c0262af
FB		 1980 if (shift == 1) {
1981 /* 32 bits */
891b38e4
FB		 1982 POPL(ssp, sp, sp_mask, new_esp);
1983 POPL(ssp, sp, sp_mask, new_ss);
1984 new_ss &= 0xffff;
2c0262af
FB		 1985 } else {
1986 /* 16 bits */
891b38e4
FB		 1987 POPW(ssp, sp, sp_mask, new_esp);
1988 POPW(ssp, sp, sp_mask, new_ss);
2c0262af 1989 }
e19e89a5
FB		 1990#ifdef DEBUG_PCALL
1991 if (loglevel & CPU_LOG_PCALL) {
14ce26e7 1992 fprintf(logfile, "new ss:esp=%04x:" TARGET_FMT_lx "\n",
e19e89a5
FB		 1993 new_ss, new_esp);
1994 }
1995#endif
14ce26e7
FB		 1996 if ((env->hflags & HF_LMA_MASK) && (new_ss & 0xfffc) == 0) {
1997 /* NULL ss is allowed in long mode */
1998 cpu_x86_load_seg_cache(env, R_SS, new_ss,
1999 0, 0xffffffff,
2000 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK |
2001 DESC_S_MASK | (rpl << DESC_DPL_SHIFT) |
2002 DESC_W_MASK | DESC_A_MASK);
2003 } else {
2004 if ((new_ss & 3) != rpl)
2005 raise_exception_err(EXCP0D_GPF, new_ss & 0xfffc);
2006 if (load_segment(&ss_e1, &ss_e2, new_ss) != 0)
2007 raise_exception_err(EXCP0D_GPF, new_ss & 0xfffc);
2008 if (!(ss_e2 & DESC_S_MASK) ||
2009 (ss_e2 & DESC_CS_MASK) ||
2010 !(ss_e2 & DESC_W_MASK))
2011 raise_exception_err(EXCP0D_GPF, new_ss & 0xfffc);
2012 dpl = (ss_e2 >> DESC_DPL_SHIFT) & 3;
2013 if (dpl != rpl)
2014 raise_exception_err(EXCP0D_GPF, new_ss & 0xfffc);
2015 if (!(ss_e2 & DESC_P_MASK))
2016 raise_exception_err(EXCP0B_NOSEG, new_ss & 0xfffc);
2017 cpu_x86_load_seg_cache(env, R_SS, new_ss,
2018 get_seg_base(ss_e1, ss_e2),
2019 get_seg_limit(ss_e1, ss_e2),
2020 ss_e2);
2021 }
2c0262af
FB		 2022
2023 cpu_x86_load_seg_cache(env, R_CS, new_cs,
2024 get_seg_base(e1, e2),
2025 get_seg_limit(e1, e2),
2026 e2);
2c0262af 2027 cpu_x86_set_cpl(env, rpl);
891b38e4 2028 sp = new_esp;
14ce26e7
FB		 2029#ifdef TARGET_X86_64
2030 if (shift == 2)
2031 sp_mask = -1;
2032 else
2033#endif
2034 sp_mask = get_sp_mask(ss_e2);
8e682019
FB		 2035
2036 /* validate data segments */
2037 validate_seg(R_ES, cpl);
2038 validate_seg(R_DS, cpl);
2039 validate_seg(R_FS, cpl);
2040 validate_seg(R_GS, cpl);
4afa6482
FB		 2041
2042 sp += addend;
2c0262af 2043 }
891b38e4 2044 ESP = (ESP & ~sp_mask) | (sp & sp_mask);
2c0262af
FB		 2045 env->eip = new_eip;
2046 if (is_iret) {
4136f33c 2047 /* NOTE: 'cpl' is the _old_ CPL */
8145122b 2048 eflags_mask = TF_MASK | AC_MASK | ID_MASK | RF_MASK | NT_MASK;
2c0262af 2049 if (cpl == 0)
4136f33c
FB		 2050 eflags_mask |= IOPL_MASK;
2051 iopl = (env->eflags >> IOPL_SHIFT) & 3;
2052 if (cpl <= iopl)
2053 eflags_mask |= IF_MASK;
2c0262af
FB		 2054 if (shift == 0)
2055 eflags_mask &= 0xffff;
2056 load_eflags(new_eflags, eflags_mask);
2057 }
2058 return;
2059
2060 return_to_vm86:
891b38e4
FB		 2061 POPL(ssp, sp, sp_mask, new_esp);
2062 POPL(ssp, sp, sp_mask, new_ss);
2063 POPL(ssp, sp, sp_mask, new_es);
2064 POPL(ssp, sp, sp_mask, new_ds);
2065 POPL(ssp, sp, sp_mask, new_fs);
2066 POPL(ssp, sp, sp_mask, new_gs);
2c0262af
FB		 2067
2068 /* modify processor state */
4136f33c 2069 load_eflags(new_eflags, TF_MASK | AC_MASK | ID_MASK |
8145122b 2070 IF_MASK | IOPL_MASK | VM_MASK | NT_MASK | VIF_MASK | VIP_MASK);
891b38e4 2071 load_seg_vm(R_CS, new_cs & 0xffff);
2c0262af 2072 cpu_x86_set_cpl(env, 3);
891b38e4
FB		 2073 load_seg_vm(R_SS, new_ss & 0xffff);
2074 load_seg_vm(R_ES, new_es & 0xffff);
2075 load_seg_vm(R_DS, new_ds & 0xffff);
2076 load_seg_vm(R_FS, new_fs & 0xffff);
2077 load_seg_vm(R_GS, new_gs & 0xffff);
2c0262af 2078
fd836909 2079 env->eip = new_eip & 0xffff;
2c0262af
FB		 2080 ESP = new_esp;
2081}
2082
08cea4ee 2083void helper_iret_protected(int shift, int next_eip)
2c0262af 2084{
7e84c249
FB		 2085 int tss_selector, type;
2086 uint32_t e1, e2;
2087
2088 /* specific case for TSS */
2089 if (env->eflags & NT_MASK) {
14ce26e7
FB		 2090#ifdef TARGET_X86_64
2091 if (env->hflags & HF_LMA_MASK)
2092 raise_exception_err(EXCP0D_GPF, 0);
2093#endif
7e84c249
FB		 2094 tss_selector = lduw_kernel(env->tr.base + 0);
2095 if (tss_selector & 4)
2096 raise_exception_err(EXCP0A_TSS, tss_selector & 0xfffc);
2097 if (load_segment(&e1, &e2, tss_selector) != 0)
2098 raise_exception_err(EXCP0A_TSS, tss_selector & 0xfffc);
2099 type = (e2 >> DESC_TYPE_SHIFT) & 0x17;
2100 /* NOTE: we check both segment and busy TSS */
2101 if (type != 3)
2102 raise_exception_err(EXCP0A_TSS, tss_selector & 0xfffc);
08cea4ee 2103 switch_tss(tss_selector, e1, e2, SWITCH_TSS_IRET, next_eip);
7e84c249
FB		 2104 } else {
2105 helper_ret_protected(shift, 1, 0);
2106 }
9df217a3
FB		 2107#ifdef USE_KQEMU
2108 if (kqemu_is_ok(env)) {
2109 CC_OP = CC_OP_EFLAGS;
2110 env->exception_index = -1;
2111 cpu_loop_exit();
2112 }
2113#endif
2c0262af
FB		 2114}
2115
2116void helper_lret_protected(int shift, int addend)
2117{
2118 helper_ret_protected(shift, 0, addend);
9df217a3
FB		 2119#ifdef USE_KQEMU
2120 if (kqemu_is_ok(env)) {
9df217a3
FB		 2121 env->exception_index = -1;
2122 cpu_loop_exit();
2123 }
2124#endif
2c0262af
FB		 2125}
2126
023fe10d
FB		 2127void helper_sysenter(void)
2128{
2129 if (env->sysenter_cs == 0) {
2130 raise_exception_err(EXCP0D_GPF, 0);
2131 }
2132 env->eflags &= ~(VM_MASK | IF_MASK | RF_MASK);
2133 cpu_x86_set_cpl(env, 0);
2134 cpu_x86_load_seg_cache(env, R_CS, env->sysenter_cs & 0xfffc,
14ce26e7 2135 0, 0xffffffff,
023fe10d
FB		 2136 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK |
2137 DESC_S_MASK |
2138 DESC_CS_MASK | DESC_R_MASK | DESC_A_MASK);
2139 cpu_x86_load_seg_cache(env, R_SS, (env->sysenter_cs + 8) & 0xfffc,
14ce26e7 2140 0, 0xffffffff,
023fe10d
FB		 2141 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK |
2142 DESC_S_MASK |
2143 DESC_W_MASK | DESC_A_MASK);
2144 ESP = env->sysenter_esp;
2145 EIP = env->sysenter_eip;
2146}
2147
2148void helper_sysexit(void)
2149{
2150 int cpl;
2151
2152 cpl = env->hflags & HF_CPL_MASK;
2153 if (env->sysenter_cs == 0 || cpl != 0) {
2154 raise_exception_err(EXCP0D_GPF, 0);
2155 }
2156 cpu_x86_set_cpl(env, 3);
2157 cpu_x86_load_seg_cache(env, R_CS, ((env->sysenter_cs + 16) & 0xfffc) | 3,
14ce26e7 2158 0, 0xffffffff,
023fe10d
FB		 2159 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK |
2160 DESC_S_MASK | (3 << DESC_DPL_SHIFT) |
2161 DESC_CS_MASK | DESC_R_MASK | DESC_A_MASK);
2162 cpu_x86_load_seg_cache(env, R_SS, ((env->sysenter_cs + 24) & 0xfffc) | 3,
14ce26e7 2163 0, 0xffffffff,
023fe10d
FB		 2164 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK |
2165 DESC_S_MASK | (3 << DESC_DPL_SHIFT) |
2166 DESC_W_MASK | DESC_A_MASK);
2167 ESP = ECX;
2168 EIP = EDX;
9df217a3
FB		 2169#ifdef USE_KQEMU
2170 if (kqemu_is_ok(env)) {
2171 env->exception_index = -1;
2172 cpu_loop_exit();
2173 }
2174#endif
023fe10d
FB		 2175}
2176
2c0262af
FB		 2177void helper_movl_crN_T0(int reg)
2178{
4d6b6c0a 2179#if !defined(CONFIG_USER_ONLY)
2c0262af
FB		 2180 switch(reg) {
2181 case 0:
1ac157da 2182 cpu_x86_update_cr0(env, T0);
2c0262af
FB		 2183 break;
2184 case 3:
1ac157da
FB		 2185 cpu_x86_update_cr3(env, T0);
2186 break;
2187 case 4:
2188 cpu_x86_update_cr4(env, T0);
2189 break;
4d6b6c0a
FB		 2190 case 8:
2191 cpu_set_apic_tpr(env, T0);
2192 break;
1ac157da
FB		 2193 default:
2194 env->cr[reg] = T0;
2c0262af
FB		 2195 break;
2196 }
4d6b6c0a 2197#endif
2c0262af
FB		 2198}
2199
2200/* XXX: do more */
2201void helper_movl_drN_T0(int reg)
2202{
2203 env->dr[reg] = T0;
2204}
2205
2206void helper_invlpg(unsigned int addr)
2207{
2208 cpu_x86_flush_tlb(env, addr);
2209}
2210
2c0262af
FB		 2211void helper_rdtsc(void)
2212{
2213 uint64_t val;
28ab0e2e
FB		 2214
2215 val = cpu_get_tsc(env);
14ce26e7
FB		 2216 EAX = (uint32_t)(val);
2217 EDX = (uint32_t)(val >> 32);
2218}
2219
2220#if defined(CONFIG_USER_ONLY)
2221void helper_wrmsr(void)
2222{
2c0262af
FB		 2223}
2224
14ce26e7
FB		 2225void helper_rdmsr(void)
2226{
2227}
2228#else
2c0262af
FB		 2229void helper_wrmsr(void)
2230{
14ce26e7
FB		 2231 uint64_t val;
2232
2233 val = ((uint32_t)EAX) | ((uint64_t)((uint32_t)EDX) << 32);
2234
2235 switch((uint32_t)ECX) {
2c0262af 2236 case MSR_IA32_SYSENTER_CS:
14ce26e7 2237 env->sysenter_cs = val & 0xffff;
2c0262af
FB		 2238 break;
2239 case MSR_IA32_SYSENTER_ESP:
14ce26e7 2240 env->sysenter_esp = val;
2c0262af
FB		 2241 break;
2242 case MSR_IA32_SYSENTER_EIP:
14ce26e7
FB		 2243 env->sysenter_eip = val;
2244 break;
2245 case MSR_IA32_APICBASE:
2246 cpu_set_apic_base(env, val);
2247 break;
2248#ifdef TARGET_X86_64
2249 case MSR_EFER:
2250#define MSR_EFER_UPDATE_MASK (MSR_EFER_SCE | MSR_EFER_LME | \
2251 MSR_EFER_NXE | MSR_EFER_FFXSR)
2252 env->efer = (env->efer & ~MSR_EFER_UPDATE_MASK) |
2253 (val & MSR_EFER_UPDATE_MASK);
2c0262af 2254 break;
14ce26e7
FB		 2255 case MSR_STAR:
2256 env->star = val;
2257 break;
2258 case MSR_LSTAR:
2259 env->lstar = val;
2260 break;
2261 case MSR_CSTAR:
2262 env->cstar = val;
2263 break;
2264 case MSR_FMASK:
2265 env->fmask = val;
2266 break;
2267 case MSR_FSBASE:
2268 env->segs[R_FS].base = val;
2269 break;
2270 case MSR_GSBASE:
2271 env->segs[R_GS].base = val;
2272 break;
2273 case MSR_KERNELGSBASE:
2274 env->kernelgsbase = val;
2275 break;
2276#endif
2c0262af
FB		 2277 default:
2278 /* XXX: exception ? */
2279 break;
2280 }
2281}
2282
2283void helper_rdmsr(void)
2284{
14ce26e7
FB		 2285 uint64_t val;
2286 switch((uint32_t)ECX) {
2c0262af 2287 case MSR_IA32_SYSENTER_CS:
14ce26e7 2288 val = env->sysenter_cs;
2c0262af
FB		 2289 break;
2290 case MSR_IA32_SYSENTER_ESP:
14ce26e7 2291 val = env->sysenter_esp;
2c0262af
FB		 2292 break;
2293 case MSR_IA32_SYSENTER_EIP:
14ce26e7
FB		 2294 val = env->sysenter_eip;
2295 break;
2296 case MSR_IA32_APICBASE:
2297 val = cpu_get_apic_base(env);
2298 break;
2299#ifdef TARGET_X86_64
2300 case MSR_EFER:
2301 val = env->efer;
2302 break;
2303 case MSR_STAR:
2304 val = env->star;
2305 break;
2306 case MSR_LSTAR:
2307 val = env->lstar;
2308 break;
2309 case MSR_CSTAR:
2310 val = env->cstar;
2311 break;
2312 case MSR_FMASK:
2313 val = env->fmask;
2314 break;
2315 case MSR_FSBASE:
2316 val = env->segs[R_FS].base;
2317 break;
2318 case MSR_GSBASE:
2319 val = env->segs[R_GS].base;
2c0262af 2320 break;
14ce26e7
FB		 2321 case MSR_KERNELGSBASE:
2322 val = env->kernelgsbase;
2323 break;
2324#endif
2c0262af
FB		 2325 default:
2326 /* XXX: exception ? */
14ce26e7 2327 val = 0;
2c0262af
FB		 2328 break;
2329 }
14ce26e7
FB		 2330 EAX = (uint32_t)(val);
2331 EDX = (uint32_t)(val >> 32);
2c0262af 2332}
14ce26e7 2333#endif
2c0262af
FB		 2334
2335void helper_lsl(void)
2336{
2337 unsigned int selector, limit;
2338 uint32_t e1, e2;
3ab493de 2339 int rpl, dpl, cpl, type;
2c0262af
FB		 2340
2341 CC_SRC = cc_table[CC_OP].compute_all() & ~CC_Z;
2342 selector = T0 & 0xffff;
2343 if (load_segment(&e1, &e2, selector) != 0)
2344 return;
3ab493de
FB		 2345 rpl = selector & 3;
2346 dpl = (e2 >> DESC_DPL_SHIFT) & 3;
2347 cpl = env->hflags & HF_CPL_MASK;
2348 if (e2 & DESC_S_MASK) {
2349 if ((e2 & DESC_CS_MASK) && (e2 & DESC_C_MASK)) {
2350 /* conforming */
2351 } else {
2352 if (dpl < cpl || dpl < rpl)
2353 return;
2354 }
2355 } else {
2356 type = (e2 >> DESC_TYPE_SHIFT) & 0xf;
2357 switch(type) {
2358 case 1:
2359 case 2:
2360 case 3:
2361 case 9:
2362 case 11:
2363 break;
2364 default:
2365 return;
2366 }
2367 if (dpl < cpl || dpl < rpl)
2368 return;
2369 }
2370 limit = get_seg_limit(e1, e2);
2c0262af
FB		 2371 T1 = limit;
2372 CC_SRC |= CC_Z;
2373}
2374
2375void helper_lar(void)
2376{
2377 unsigned int selector;
2378 uint32_t e1, e2;
3ab493de 2379 int rpl, dpl, cpl, type;
2c0262af
FB		 2380
2381 CC_SRC = cc_table[CC_OP].compute_all() & ~CC_Z;
2382 selector = T0 & 0xffff;
3ab493de
FB		 2383 if ((selector & 0xfffc) == 0)
2384 return;
2c0262af
FB		 2385 if (load_segment(&e1, &e2, selector) != 0)
2386 return;
3ab493de
FB		 2387 rpl = selector & 3;
2388 dpl = (e2 >> DESC_DPL_SHIFT) & 3;
2389 cpl = env->hflags & HF_CPL_MASK;
2390 if (e2 & DESC_S_MASK) {
2391 if ((e2 & DESC_CS_MASK) && (e2 & DESC_C_MASK)) {
2392 /* conforming */
2393 } else {
2394 if (dpl < cpl || dpl < rpl)
2395 return;
2396 }
2397 } else {
2398 type = (e2 >> DESC_TYPE_SHIFT) & 0xf;
2399 switch(type) {
2400 case 1:
2401 case 2:
2402 case 3:
2403 case 4:
2404 case 5:
2405 case 9:
2406 case 11:
2407 case 12:
2408 break;
2409 default:
2410 return;
2411 }
2412 if (dpl < cpl || dpl < rpl)
2413 return;
2414 }
2c0262af
FB		 2415 T1 = e2 & 0x00f0ff00;
2416 CC_SRC |= CC_Z;
2417}
2418
3ab493de
FB		 2419void helper_verr(void)
2420{
2421 unsigned int selector;
2422 uint32_t e1, e2;
2423 int rpl, dpl, cpl;
2424
2425 CC_SRC = cc_table[CC_OP].compute_all() & ~CC_Z;
2426 selector = T0 & 0xffff;
2427 if ((selector & 0xfffc) == 0)
2428 return;
2429 if (load_segment(&e1, &e2, selector) != 0)
2430 return;
2431 if (!(e2 & DESC_S_MASK))
2432 return;
2433 rpl = selector & 3;
2434 dpl = (e2 >> DESC_DPL_SHIFT) & 3;
2435 cpl = env->hflags & HF_CPL_MASK;
2436 if (e2 & DESC_CS_MASK) {
2437 if (!(e2 & DESC_R_MASK))
2438 return;
2439 if (!(e2 & DESC_C_MASK)) {
2440 if (dpl < cpl || dpl < rpl)
2441 return;
2442 }
2443 } else {
2444 if (dpl < cpl || dpl < rpl)
2445 return;
2446 }
f3f2d9be 2447 CC_SRC |= CC_Z;
3ab493de
FB		 2448}
2449
2450void helper_verw(void)
2451{
2452 unsigned int selector;
2453 uint32_t e1, e2;
2454 int rpl, dpl, cpl;
2455
2456 CC_SRC = cc_table[CC_OP].compute_all() & ~CC_Z;
2457 selector = T0 & 0xffff;
2458 if ((selector & 0xfffc) == 0)
2459 return;
2460 if (load_segment(&e1, &e2, selector) != 0)
2461 return;
2462 if (!(e2 & DESC_S_MASK))
2463 return;
2464 rpl = selector & 3;
2465 dpl = (e2 >> DESC_DPL_SHIFT) & 3;
2466 cpl = env->hflags & HF_CPL_MASK;
2467 if (e2 & DESC_CS_MASK) {
2468 return;
2469 } else {
2470 if (dpl < cpl || dpl < rpl)
2471 return;
2472 if (!(e2 & DESC_W_MASK))
2473 return;
2474 }
f3f2d9be 2475 CC_SRC |= CC_Z;
3ab493de
FB		 2476}
2477
2c0262af
FB		 2478/* FPU helpers */
2479
2c0262af
FB		 2480void helper_fldt_ST0_A0(void)
2481{
2482 int new_fpstt;
2483 new_fpstt = (env->fpstt - 1) & 7;
664e0f19 2484 env->fpregs[new_fpstt].d = helper_fldt(A0);
2c0262af
FB		 2485 env->fpstt = new_fpstt;
2486 env->fptags[new_fpstt] = 0; /* validate stack entry */
2487}
2488
2489void helper_fstt_ST0_A0(void)
2490{
14ce26e7 2491 helper_fstt(ST0, A0);
2c0262af 2492}
2c0262af 2493
2ee73ac3
FB		 2494void fpu_set_exception(int mask)
2495{
2496 env->fpus |= mask;
2497 if (env->fpus & (~env->fpuc & FPUC_EM))
2498 env->fpus |= FPUS_SE | FPUS_B;
2499}
2500
2501CPU86_LDouble helper_fdiv(CPU86_LDouble a, CPU86_LDouble b)
2502{
2503 if (b == 0.0)
2504 fpu_set_exception(FPUS_ZE);
2505 return a / b;
2506}
2507
2508void fpu_raise_exception(void)
2509{
2510 if (env->cr[0] & CR0_NE_MASK) {
2511 raise_exception(EXCP10_COPR);
2512 }
2513#if !defined(CONFIG_USER_ONLY)
2514 else {
2515 cpu_set_ferr(env);
2516 }
2517#endif
2518}
2519
2c0262af
FB		 2520/* BCD ops */
2521
2c0262af
FB		 2522void helper_fbld_ST0_A0(void)
2523{
2524 CPU86_LDouble tmp;
2525 uint64_t val;
2526 unsigned int v;
2527 int i;
2528
2529 val = 0;
2530 for(i = 8; i >= 0; i--) {
14ce26e7 2531 v = ldub(A0 + i);
2c0262af
FB		 2532 val = (val * 100) + ((v >> 4) * 10) + (v & 0xf);
2533 }
2534 tmp = val;
14ce26e7 2535 if (ldub(A0 + 9) & 0x80)
2c0262af
FB		 2536 tmp = -tmp;
2537 fpush();
2538 ST0 = tmp;
2539}
2540
2541void helper_fbst_ST0_A0(void)
2542{
2c0262af 2543 int v;
14ce26e7 2544 target_ulong mem_ref, mem_end;
2c0262af
FB		 2545 int64_t val;
2546
7a0e1f41 2547 val = floatx_to_int64(ST0, &env->fp_status);
14ce26e7 2548 mem_ref = A0;
2c0262af
FB		 2549 mem_end = mem_ref + 9;
2550 if (val < 0) {
2551 stb(mem_end, 0x80);
2552 val = -val;
2553 } else {
2554 stb(mem_end, 0x00);
2555 }
2556 while (mem_ref < mem_end) {
2557 if (val == 0)
2558 break;
2559 v = val % 100;
2560 val = val / 100;
2561 v = ((v / 10) << 4) | (v % 10);
2562 stb(mem_ref++, v);
2563 }
2564 while (mem_ref < mem_end) {
2565 stb(mem_ref++, 0);
2566 }
2567}
2568
2569void helper_f2xm1(void)
2570{
2571 ST0 = pow(2.0,ST0) - 1.0;
2572}
2573
2574void helper_fyl2x(void)
2575{
2576 CPU86_LDouble fptemp;
2577
2578 fptemp = ST0;
2579 if (fptemp>0.0){
2580 fptemp = log(fptemp)/log(2.0); /* log2(ST) */
2581 ST1 *= fptemp;
2582 fpop();
2583 } else {
2584 env->fpus &= (~0x4700);
2585 env->fpus |= 0x400;
2586 }
2587}
2588
2589void helper_fptan(void)
2590{
2591 CPU86_LDouble fptemp;
2592
2593 fptemp = ST0;
2594 if((fptemp > MAXTAN)||(fptemp < -MAXTAN)) {
2595 env->fpus |= 0x400;
2596 } else {
2597 ST0 = tan(fptemp);
2598 fpush();
2599 ST0 = 1.0;
2600 env->fpus &= (~0x400); /* C2 <-- 0 */
2601 /* the above code is for |arg| < 2**52 only */
2602 }
2603}
2604
2605void helper_fpatan(void)
2606{
2607 CPU86_LDouble fptemp, fpsrcop;
2608
2609 fpsrcop = ST1;
2610 fptemp = ST0;
2611 ST1 = atan2(fpsrcop,fptemp);
2612 fpop();
2613}
2614
2615void helper_fxtract(void)
2616{
2617 CPU86_LDoubleU temp;
2618 unsigned int expdif;
2619
2620 temp.d = ST0;
2621 expdif = EXPD(temp) - EXPBIAS;
2622 /*DP exponent bias*/
2623 ST0 = expdif;
2624 fpush();
2625 BIASEXPONENT(temp);
2626 ST0 = temp.d;
2627}
2628
2629void helper_fprem1(void)
2630{
2631 CPU86_LDouble dblq, fpsrcop, fptemp;
2632 CPU86_LDoubleU fpsrcop1, fptemp1;
2633 int expdif;
2634 int q;
2635
2636 fpsrcop = ST0;
2637 fptemp = ST1;
2638 fpsrcop1.d = fpsrcop;
2639 fptemp1.d = fptemp;
2640 expdif = EXPD(fpsrcop1) - EXPD(fptemp1);
2641 if (expdif < 53) {
2642 dblq = fpsrcop / fptemp;
2643 dblq = (dblq < 0.0)? ceil(dblq): floor(dblq);
2644 ST0 = fpsrcop - fptemp*dblq;
2645 q = (int)dblq; /* cutting off top bits is assumed here */
2646 env->fpus &= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */
2647 /* (C0,C1,C3) <-- (q2,q1,q0) */
2648 env->fpus |= (q&0x4) << 6; /* (C0) <-- q2 */
2649 env->fpus |= (q&0x2) << 8; /* (C1) <-- q1 */
2650 env->fpus |= (q&0x1) << 14; /* (C3) <-- q0 */
2651 } else {
2652 env->fpus |= 0x400; /* C2 <-- 1 */
2653 fptemp = pow(2.0, expdif-50);
2654 fpsrcop = (ST0 / ST1) / fptemp;
2655 /* fpsrcop = integer obtained by rounding to the nearest */
2656 fpsrcop = (fpsrcop-floor(fpsrcop) < ceil(fpsrcop)-fpsrcop)?
2657 floor(fpsrcop): ceil(fpsrcop);
2658 ST0 -= (ST1 * fpsrcop * fptemp);
2659 }
2660}
2661
2662void helper_fprem(void)
2663{
2664 CPU86_LDouble dblq, fpsrcop, fptemp;
2665 CPU86_LDoubleU fpsrcop1, fptemp1;
2666 int expdif;
2667 int q;
2668
2669 fpsrcop = ST0;
2670 fptemp = ST1;
2671 fpsrcop1.d = fpsrcop;
2672 fptemp1.d = fptemp;
2673 expdif = EXPD(fpsrcop1) - EXPD(fptemp1);
2674 if ( expdif < 53 ) {
2675 dblq = fpsrcop / fptemp;
2676 dblq = (dblq < 0.0)? ceil(dblq): floor(dblq);
2677 ST0 = fpsrcop - fptemp*dblq;
2678 q = (int)dblq; /* cutting off top bits is assumed here */
2679 env->fpus &= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */
2680 /* (C0,C1,C3) <-- (q2,q1,q0) */
2681 env->fpus |= (q&0x4) << 6; /* (C0) <-- q2 */
2682 env->fpus |= (q&0x2) << 8; /* (C1) <-- q1 */
2683 env->fpus |= (q&0x1) << 14; /* (C3) <-- q0 */
2684 } else {
2685 env->fpus |= 0x400; /* C2 <-- 1 */
2686 fptemp = pow(2.0, expdif-50);
2687 fpsrcop = (ST0 / ST1) / fptemp;
2688 /* fpsrcop = integer obtained by chopping */
2689 fpsrcop = (fpsrcop < 0.0)?
2690 -(floor(fabs(fpsrcop))): floor(fpsrcop);
2691 ST0 -= (ST1 * fpsrcop * fptemp);
2692 }
2693}
2694
2695void helper_fyl2xp1(void)
2696{
2697 CPU86_LDouble fptemp;
2698
2699 fptemp = ST0;
2700 if ((fptemp+1.0)>0.0) {
2701 fptemp = log(fptemp+1.0) / log(2.0); /* log2(ST+1.0) */
2702 ST1 *= fptemp;
2703 fpop();
2704 } else {
2705 env->fpus &= (~0x4700);
2706 env->fpus |= 0x400;
2707 }
2708}
2709
2710void helper_fsqrt(void)
2711{
2712 CPU86_LDouble fptemp;
2713
2714 fptemp = ST0;
2715 if (fptemp<0.0) {
2716 env->fpus &= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */
2717 env->fpus |= 0x400;
2718 }
2719 ST0 = sqrt(fptemp);
2720}
2721
2722void helper_fsincos(void)
2723{
2724 CPU86_LDouble fptemp;
2725
2726 fptemp = ST0;
2727 if ((fptemp > MAXTAN)||(fptemp < -MAXTAN)) {
2728 env->fpus |= 0x400;
2729 } else {
2730 ST0 = sin(fptemp);
2731 fpush();
2732 ST0 = cos(fptemp);
2733 env->fpus &= (~0x400); /* C2 <-- 0 */
2734 /* the above code is for |arg| < 2**63 only */
2735 }
2736}
2737
2738void helper_frndint(void)
2739{
7a0e1f41 2740 ST0 = floatx_round_to_int(ST0, &env->fp_status);
2c0262af
FB		 2741}
2742
2743void helper_fscale(void)
2744{
2745 CPU86_LDouble fpsrcop, fptemp;
2746
2747 fpsrcop = 2.0;
2748 fptemp = pow(fpsrcop,ST1);
2749 ST0 *= fptemp;
2750}
2751
2752void helper_fsin(void)
2753{
2754 CPU86_LDouble fptemp;
2755
2756 fptemp = ST0;
2757 if ((fptemp > MAXTAN)||(fptemp < -MAXTAN)) {
2758 env->fpus |= 0x400;
2759 } else {
2760 ST0 = sin(fptemp);
2761 env->fpus &= (~0x400); /* C2 <-- 0 */
2762 /* the above code is for |arg| < 2**53 only */
2763 }
2764}
2765
2766void helper_fcos(void)
2767{
2768 CPU86_LDouble fptemp;
2769
2770 fptemp = ST0;
2771 if((fptemp > MAXTAN)||(fptemp < -MAXTAN)) {
2772 env->fpus |= 0x400;
2773 } else {
2774 ST0 = cos(fptemp);
2775 env->fpus &= (~0x400); /* C2 <-- 0 */
2776 /* the above code is for |arg5 < 2**63 only */
2777 }
2778}
2779
2780void helper_fxam_ST0(void)
2781{
2782 CPU86_LDoubleU temp;
2783 int expdif;
2784
2785 temp.d = ST0;
2786
2787 env->fpus &= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */
2788 if (SIGND(temp))
2789 env->fpus |= 0x200; /* C1 <-- 1 */
2790
2791 expdif = EXPD(temp);
2792 if (expdif == MAXEXPD) {
2793 if (MANTD(temp) == 0)
2794 env->fpus |= 0x500 /*Infinity*/;
2795 else
2796 env->fpus |= 0x100 /*NaN*/;
2797 } else if (expdif == 0) {
2798 if (MANTD(temp) == 0)
2799 env->fpus |= 0x4000 /*Zero*/;
2800 else
2801 env->fpus |= 0x4400 /*Denormal*/;
2802 } else {
2803 env->fpus |= 0x400;
2804 }
2805}
2806
14ce26e7 2807void helper_fstenv(target_ulong ptr, int data32)
2c0262af
FB		 2808{
2809 int fpus, fptag, exp, i;
2810 uint64_t mant;
2811 CPU86_LDoubleU tmp;
2812
2813 fpus = (env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11;
2814 fptag = 0;
2815 for (i=7; i>=0; i--) {
2816 fptag <<= 2;
2817 if (env->fptags[i]) {
2818 fptag |= 3;
2819 } else {
664e0f19 2820 tmp.d = env->fpregs[i].d;
2c0262af
FB		 2821 exp = EXPD(tmp);
2822 mant = MANTD(tmp);
2823 if (exp == 0 && mant == 0) {
2824 /* zero */
2825 fptag |= 1;
2826 } else if (exp == 0 || exp == MAXEXPD
2827#ifdef USE_X86LDOUBLE
2828 || (mant & (1LL << 63)) == 0
2829#endif
2830 ) {
2831 /* NaNs, infinity, denormal */
2832 fptag |= 2;
2833 }
2834 }
2835 }
2836 if (data32) {
2837 /* 32 bit */
2838 stl(ptr, env->fpuc);
2839 stl(ptr + 4, fpus);
2840 stl(ptr + 8, fptag);
2edcdce3
FB		 2841 stl(ptr + 12, 0); /* fpip */
2842 stl(ptr + 16, 0); /* fpcs */
2843 stl(ptr + 20, 0); /* fpoo */
2844 stl(ptr + 24, 0); /* fpos */
2c0262af
FB		 2845 } else {
2846 /* 16 bit */
2847 stw(ptr, env->fpuc);
2848 stw(ptr + 2, fpus);
2849 stw(ptr + 4, fptag);
2850 stw(ptr + 6, 0);
2851 stw(ptr + 8, 0);
2852 stw(ptr + 10, 0);
2853 stw(ptr + 12, 0);
2854 }
2855}
2856
14ce26e7 2857void helper_fldenv(target_ulong ptr, int data32)
2c0262af
FB		 2858{
2859 int i, fpus, fptag;
2860
2861 if (data32) {
2862 env->fpuc = lduw(ptr);
2863 fpus = lduw(ptr + 4);
2864 fptag = lduw(ptr + 8);
2865 }
2866 else {
2867 env->fpuc = lduw(ptr);
2868 fpus = lduw(ptr + 2);
2869 fptag = lduw(ptr + 4);
2870 }
2871 env->fpstt = (fpus >> 11) & 7;
2872 env->fpus = fpus & ~0x3800;
2edcdce3 2873 for(i = 0;i < 8; i++) {
2c0262af
FB		 2874 env->fptags[i] = ((fptag & 3) == 3);
2875 fptag >>= 2;
2876 }
2877}
2878
14ce26e7 2879void helper_fsave(target_ulong ptr, int data32)
2c0262af
FB		 2880{
2881 CPU86_LDouble tmp;
2882 int i;
2883
2884 helper_fstenv(ptr, data32);
2885
2886 ptr += (14 << data32);
2887 for(i = 0;i < 8; i++) {
2888 tmp = ST(i);
2c0262af 2889 helper_fstt(tmp, ptr);
2c0262af
FB		 2890 ptr += 10;
2891 }
2892
2893 /* fninit */
2894 env->fpus = 0;
2895 env->fpstt = 0;
2896 env->fpuc = 0x37f;
2897 env->fptags[0] = 1;
2898 env->fptags[1] = 1;
2899 env->fptags[2] = 1;
2900 env->fptags[3] = 1;
2901 env->fptags[4] = 1;
2902 env->fptags[5] = 1;
2903 env->fptags[6] = 1;
2904 env->fptags[7] = 1;
2905}
2906
14ce26e7 2907void helper_frstor(target_ulong ptr, int data32)
2c0262af
FB		 2908{
2909 CPU86_LDouble tmp;
2910 int i;
2911
2912 helper_fldenv(ptr, data32);
2913 ptr += (14 << data32);
2914
2915 for(i = 0;i < 8; i++) {
2c0262af 2916 tmp = helper_fldt(ptr);
2c0262af
FB		 2917 ST(i) = tmp;
2918 ptr += 10;
2919 }
2920}
2921
14ce26e7
FB		 2922void helper_fxsave(target_ulong ptr, int data64)
2923{
2924 int fpus, fptag, i, nb_xmm_regs;
2925 CPU86_LDouble tmp;
2926 target_ulong addr;
2927
2928 fpus = (env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11;
2929 fptag = 0;
2930 for(i = 0; i < 8; i++) {
d3c61721 2931 fptag |= (env->fptags[i] << i);
14ce26e7
FB		 2932 }
2933 stw(ptr, env->fpuc);
2934 stw(ptr + 2, fpus);
d3c61721 2935 stw(ptr + 4, fptag ^ 0xff);
14ce26e7
FB		 2936
2937 addr = ptr + 0x20;
2938 for(i = 0;i < 8; i++) {
2939 tmp = ST(i);
2940 helper_fstt(tmp, addr);
2941 addr += 16;
2942 }
2943
2944 if (env->cr[4] & CR4_OSFXSR_MASK) {
a8ede8ba 2945 /* XXX: finish it */
664e0f19 2946 stl(ptr + 0x18, env->mxcsr); /* mxcsr */
d3c61721 2947 stl(ptr + 0x1c, 0x0000ffff); /* mxcsr_mask */
14ce26e7
FB		 2948 nb_xmm_regs = 8 << data64;
2949 addr = ptr + 0xa0;
2950 for(i = 0; i < nb_xmm_regs; i++) {
a8ede8ba
FB		 2951 stq(addr, env->xmm_regs[i].XMM_Q(0));
2952 stq(addr + 8, env->xmm_regs[i].XMM_Q(1));
14ce26e7
FB		 2953 addr += 16;
2954 }
2955 }
2956}
2957
2958void helper_fxrstor(target_ulong ptr, int data64)
2959{
2960 int i, fpus, fptag, nb_xmm_regs;
2961 CPU86_LDouble tmp;
2962 target_ulong addr;
2963
2964 env->fpuc = lduw(ptr);
2965 fpus = lduw(ptr + 2);
d3c61721 2966 fptag = lduw(ptr + 4);
14ce26e7
FB		 2967 env->fpstt = (fpus >> 11) & 7;
2968 env->fpus = fpus & ~0x3800;
2969 fptag ^= 0xff;
2970 for(i = 0;i < 8; i++) {
d3c61721 2971 env->fptags[i] = ((fptag >> i) & 1);
14ce26e7
FB		 2972 }
2973
2974 addr = ptr + 0x20;
2975 for(i = 0;i < 8; i++) {
2976 tmp = helper_fldt(addr);
2977 ST(i) = tmp;
2978 addr += 16;
2979 }
2980
2981 if (env->cr[4] & CR4_OSFXSR_MASK) {
31313213 2982 /* XXX: finish it */
664e0f19 2983 env->mxcsr = ldl(ptr + 0x18);
14ce26e7
FB		 2984 //ldl(ptr + 0x1c);
2985 nb_xmm_regs = 8 << data64;
2986 addr = ptr + 0xa0;
2987 for(i = 0; i < nb_xmm_regs; i++) {
a8ede8ba
FB		 2988 env->xmm_regs[i].XMM_Q(0) = ldq(addr);
2989 env->xmm_regs[i].XMM_Q(1) = ldq(addr + 8);
14ce26e7
FB		 2990 addr += 16;
2991 }
2992 }
2993}
1f1af9fd
FB		 2994
2995#ifndef USE_X86LDOUBLE
2996
2997void cpu_get_fp80(uint64_t *pmant, uint16_t *pexp, CPU86_LDouble f)
2998{
2999 CPU86_LDoubleU temp;
3000 int e;
3001
3002 temp.d = f;
3003 /* mantissa */
3004 *pmant = (MANTD(temp) << 11) | (1LL << 63);
3005 /* exponent + sign */
3006 e = EXPD(temp) - EXPBIAS + 16383;
3007 e |= SIGND(temp) >> 16;
3008 *pexp = e;
3009}
3010
3011CPU86_LDouble cpu_set_fp80(uint64_t mant, uint16_t upper)
3012{
3013 CPU86_LDoubleU temp;
3014 int e;
3015 uint64_t ll;
3016
3017 /* XXX: handle overflow ? */
3018 e = (upper & 0x7fff) - 16383 + EXPBIAS; /* exponent */
3019 e |= (upper >> 4) & 0x800; /* sign */
3020 ll = (mant >> 11) & ((1LL << 52) - 1);
3021#ifdef __arm__
3022 temp.l.upper = (e << 20) | (ll >> 32);
3023 temp.l.lower = ll;
3024#else
3025 temp.ll = ll | ((uint64_t)e << 52);
3026#endif
3027 return temp.d;
3028}
3029
3030#else
3031
3032void cpu_get_fp80(uint64_t *pmant, uint16_t *pexp, CPU86_LDouble f)
3033{
3034 CPU86_LDoubleU temp;
3035
3036 temp.d = f;
3037 *pmant = temp.l.lower;
3038 *pexp = temp.l.upper;
3039}
3040
3041CPU86_LDouble cpu_set_fp80(uint64_t mant, uint16_t upper)
3042{
3043 CPU86_LDoubleU temp;
3044
3045 temp.l.upper = upper;
3046 temp.l.lower = mant;
3047 return temp.d;
3048}
3049#endif
3050
14ce26e7
FB		 3051#ifdef TARGET_X86_64
3052
3053//#define DEBUG_MULDIV
3054
3055static void add128(uint64_t *plow, uint64_t *phigh, uint64_t a, uint64_t b)
3056{
3057 *plow += a;
3058 /* carry test */
3059 if (*plow < a)
3060 (*phigh)++;
3061 *phigh += b;
3062}
3063
3064static void neg128(uint64_t *plow, uint64_t *phigh)
3065{
3066 *plow = ~ *plow;
3067 *phigh = ~ *phigh;
3068 add128(plow, phigh, 1, 0);
3069}
3070
3071static void mul64(uint64_t *plow, uint64_t *phigh, uint64_t a, uint64_t b)
3072{
3073 uint32_t a0, a1, b0, b1;
3074 uint64_t v;
3075
3076 a0 = a;
3077 a1 = a >> 32;
3078
3079 b0 = b;
3080 b1 = b >> 32;
3081
3082 v = (uint64_t)a0 * (uint64_t)b0;
3083 *plow = v;
3084 *phigh = 0;
3085
3086 v = (uint64_t)a0 * (uint64_t)b1;
3087 add128(plow, phigh, v << 32, v >> 32);
3088
3089 v = (uint64_t)a1 * (uint64_t)b0;
3090 add128(plow, phigh, v << 32, v >> 32);
3091
3092 v = (uint64_t)a1 * (uint64_t)b1;
3093 *phigh += v;
3094#ifdef DEBUG_MULDIV
3095 printf("mul: 0x%016llx * 0x%016llx = 0x%016llx%016llx\n",
3096 a, b, *phigh, *plow);
3097#endif
3098}
3099
3100static void imul64(uint64_t *plow, uint64_t *phigh, int64_t a, int64_t b)
3101{
3102 int sa, sb;
3103 sa = (a < 0);
3104 if (sa)
3105 a = -a;
3106 sb = (b < 0);
3107 if (sb)
3108 b = -b;
3109 mul64(plow, phigh, a, b);
3110 if (sa ^ sb) {
3111 neg128(plow, phigh);
3112 }
3113}
3114
a8ede8ba 3115/* XXX: overflow support */
14ce26e7
FB		 3116static void div64(uint64_t *plow, uint64_t *phigh, uint64_t b)
3117{
3118 uint64_t q, r, a1, a0;
3119 int i, qb;
3120
3121 a0 = *plow;
3122 a1 = *phigh;
3123 if (a1 == 0) {
3124 q = a0 / b;
3125 r = a0 % b;
3126 *plow = q;
3127 *phigh = r;
3128 } else {
3129 /* XXX: use a better algorithm */
3130 for(i = 0; i < 64; i++) {
a8ede8ba 3131 a1 = (a1 << 1) | (a0 >> 63);
14ce26e7
FB		 3132 if (a1 >= b) {
3133 a1 -= b;
3134 qb = 1;
3135 } else {
3136 qb = 0;
3137 }
14ce26e7
FB		 3138 a0 = (a0 << 1) | qb;
3139 }
a8ede8ba 3140#if defined(DEBUG_MULDIV)
14ce26e7
FB		 3141 printf("div: 0x%016llx%016llx / 0x%016llx: q=0x%016llx r=0x%016llx\n",
3142 *phigh, *plow, b, a0, a1);
3143#endif
3144 *plow = a0;
3145 *phigh = a1;
3146 }
3147}
3148
31313213 3149static void idiv64(uint64_t *plow, uint64_t *phigh, int64_t b)
14ce26e7
FB		 3150{
3151 int sa, sb;
3152 sa = ((int64_t)*phigh < 0);
3153 if (sa)
3154 neg128(plow, phigh);
3155 sb = (b < 0);
3156 if (sb)
3157 b = -b;
3158 div64(plow, phigh, b);
3159 if (sa ^ sb)
3160 *plow = - *plow;
31313213 3161 if (sa)
14ce26e7
FB		 3162 *phigh = - *phigh;
3163}
3164
3165void helper_mulq_EAX_T0(void)
3166{
3167 uint64_t r0, r1;
3168
3169 mul64(&r0, &r1, EAX, T0);
3170 EAX = r0;
3171 EDX = r1;
3172 CC_DST = r0;
3173 CC_SRC = r1;
3174}
3175
3176void helper_imulq_EAX_T0(void)
3177{
3178 uint64_t r0, r1;
3179
3180 imul64(&r0, &r1, EAX, T0);
3181 EAX = r0;
3182 EDX = r1;
3183 CC_DST = r0;
a8ede8ba 3184 CC_SRC = ((int64_t)r1 != ((int64_t)r0 >> 63));
14ce26e7
FB		 3185}
3186
3187void helper_imulq_T0_T1(void)
3188{
3189 uint64_t r0, r1;
3190
3191 imul64(&r0, &r1, T0, T1);
3192 T0 = r0;
3193 CC_DST = r0;
3194 CC_SRC = ((int64_t)r1 != ((int64_t)r0 >> 63));
3195}
3196
3197void helper_divq_EAX_T0(void)
3198{
3199 uint64_t r0, r1;
3200 if (T0 == 0) {
3201 raise_exception(EXCP00_DIVZ);
3202 }
3203 r0 = EAX;
3204 r1 = EDX;
3205 div64(&r0, &r1, T0);
3206 EAX = r0;
3207 EDX = r1;
3208}
3209
3210void helper_idivq_EAX_T0(void)
3211{
3212 uint64_t r0, r1;
3213 if (T0 == 0) {
3214 raise_exception(EXCP00_DIVZ);
3215 }
3216 r0 = EAX;
3217 r1 = EDX;
3218 idiv64(&r0, &r1, T0);
3219 EAX = r0;
3220 EDX = r1;
3221}
3222
3223#endif
3224
664e0f19
FB		 3225float approx_rsqrt(float a)
3226{
3227 return 1.0 / sqrt(a);
3228}
3229
3230float approx_rcp(float a)
3231{
3232 return 1.0 / a;
3233}
3234
7a0e1f41 3235void update_fp_status(void)
4d6b6c0a 3236{
7a0e1f41 3237 int rnd_type;
4d6b6c0a 3238
7a0e1f41
FB		 3239 /* set rounding mode */
3240 switch(env->fpuc & RC_MASK) {
3241 default:
3242 case RC_NEAR:
3243 rnd_type = float_round_nearest_even;
3244 break;
3245 case RC_DOWN:
3246 rnd_type = float_round_down;
3247 break;
3248 case RC_UP:
3249 rnd_type = float_round_up;
3250 break;
3251 case RC_CHOP:
3252 rnd_type = float_round_to_zero;
3253 break;
3254 }
3255 set_float_rounding_mode(rnd_type, &env->fp_status);
3256#ifdef FLOATX80
3257 switch((env->fpuc >> 8) & 3) {
3258 case 0:
3259 rnd_type = 32;
3260 break;
3261 case 2:
3262 rnd_type = 64;
3263 break;
3264 case 3:
3265 default:
3266 rnd_type = 80;
3267 break;
3268 }
3269 set_floatx80_rounding_precision(rnd_type, &env->fp_status);
4d6b6c0a 3270#endif
7a0e1f41 3271}
664e0f19 3272
61382a50
FB		 3273#if !defined(CONFIG_USER_ONLY)
3274
3275#define MMUSUFFIX _mmu
3276#define GETPC() (__builtin_return_address(0))
3277
2c0262af
FB		 3278#define SHIFT 0
3279#include "softmmu_template.h"
3280
3281#define SHIFT 1
3282#include "softmmu_template.h"
3283
3284#define SHIFT 2
3285#include "softmmu_template.h"
3286
3287#define SHIFT 3
3288#include "softmmu_template.h"
3289
61382a50
FB		 3290#endif
3291
3292/* try to fill the TLB and return an exception if error. If retaddr is
3293 NULL, it means that the function was called in C code (i.e. not
3294 from generated code or from helper.c) */
3295/* XXX: fix it to restore all registers */
14ce26e7 3296void tlb_fill(target_ulong addr, int is_write, int is_user, void *retaddr)
2c0262af
FB		 3297{
3298 TranslationBlock *tb;
3299 int ret;
3300 unsigned long pc;
61382a50
FB		 3301 CPUX86State *saved_env;
3302
3303 /* XXX: hack to restore env in all cases, even if not called from
3304 generated code */
3305 saved_env = env;
3306 env = cpu_single_env;
61382a50
FB		 3307
3308 ret = cpu_x86_handle_mmu_fault(env, addr, is_write, is_user, 1);
2c0262af 3309 if (ret) {
61382a50
FB		 3310 if (retaddr) {
3311 /* now we have a real cpu fault */
3312 pc = (unsigned long)retaddr;
3313 tb = tb_find_pc(pc);
3314 if (tb) {
3315 /* the PC is inside the translated code. It means that we have
3316 a virtual CPU fault */
58fe2f10 3317 cpu_restore_state(tb, env, pc, NULL);
61382a50 3318 }
2c0262af 3319 }
0d1a29f9
FB		 3320 if (retaddr)
3321 raise_exception_err(EXCP0E_PAGE, env->error_code);
3322 else
3323 raise_exception_err_norestore(EXCP0E_PAGE, env->error_code);
2c0262af 3324 }
61382a50 3325 env = saved_env;
2c0262af 3326}
Qemu copy for testing