root / target-i386 / helper.c @ 69d35728
History | View | Annotate | Download (109.9 kB)
| 1 |
/*
|
|---|---|
| 2 |
* i386 helpers
|
| 3 |
*
|
| 4 |
* Copyright (c) 2003 Fabrice Bellard
|
| 5 |
*
|
| 6 |
* This library is free software; you can redistribute it and/or
|
| 7 |
* modify it under the terms of the GNU Lesser General Public
|
| 8 |
* License as published by the Free Software Foundation; either
|
| 9 |
* version 2 of the License, or (at your option) any later version.
|
| 10 |
*
|
| 11 |
* This library is distributed in the hope that it will be useful,
|
| 12 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
| 13 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
| 14 |
* Lesser General Public License for more details.
|
| 15 |
*
|
| 16 |
* You should have received a copy of the GNU Lesser General Public
|
| 17 |
* License along with this library; if not, write to the Free Software
|
| 18 |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
| 19 |
*/
|
| 20 |
#include "exec.h" |
| 21 |
|
| 22 |
//#define DEBUG_PCALL
|
| 23 |
|
| 24 |
#if 0
|
| 25 |
#define raise_exception_err(a, b)\
|
| 26 |
do {\
|
| 27 |
if (logfile)\
|
| 28 |
fprintf(logfile, "raise_exception line=%d\n", __LINE__);\
|
| 29 |
(raise_exception_err)(a, b);\
|
| 30 |
} while (0)
|
| 31 |
#endif
|
| 32 |
|
| 33 |
const uint8_t parity_table[256] = { |
| 34 |
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
| 35 |
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
| 36 |
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
| 37 |
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
| 38 |
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
| 39 |
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
| 40 |
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
| 41 |
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
| 42 |
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
| 43 |
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
| 44 |
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
| 45 |
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
| 46 |
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
| 47 |
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
| 48 |
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
| 49 |
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
| 50 |
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
| 51 |
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
| 52 |
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
| 53 |
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
| 54 |
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
| 55 |
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
| 56 |
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
| 57 |
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
| 58 |
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
| 59 |
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
| 60 |
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
| 61 |
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
| 62 |
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
| 63 |
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
| 64 |
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
| 65 |
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
| 66 |
}; |
| 67 |
|
| 68 |
/* modulo 17 table */
|
| 69 |
const uint8_t rclw_table[32] = { |
| 70 |
0, 1, 2, 3, 4, 5, 6, 7, |
| 71 |
8, 9,10,11,12,13,14,15, |
| 72 |
16, 0, 1, 2, 3, 4, 5, 6, |
| 73 |
7, 8, 9,10,11,12,13,14, |
| 74 |
}; |
| 75 |
|
| 76 |
/* modulo 9 table */
|
| 77 |
const uint8_t rclb_table[32] = { |
| 78 |
0, 1, 2, 3, 4, 5, 6, 7, |
| 79 |
8, 0, 1, 2, 3, 4, 5, 6, |
| 80 |
7, 8, 0, 1, 2, 3, 4, 5, |
| 81 |
6, 7, 8, 0, 1, 2, 3, 4, |
| 82 |
}; |
| 83 |
|
| 84 |
const CPU86_LDouble f15rk[7] = |
| 85 |
{
|
| 86 |
0.00000000000000000000L, |
| 87 |
1.00000000000000000000L, |
| 88 |
3.14159265358979323851L, /*pi*/ |
| 89 |
0.30102999566398119523L, /*lg2*/ |
| 90 |
0.69314718055994530943L, /*ln2*/ |
| 91 |
1.44269504088896340739L, /*l2e*/ |
| 92 |
3.32192809488736234781L, /*l2t*/ |
| 93 |
}; |
| 94 |
|
| 95 |
/* thread support */
|
| 96 |
|
| 97 |
spinlock_t global_cpu_lock = SPIN_LOCK_UNLOCKED; |
| 98 |
|
| 99 |
void cpu_lock(void) |
| 100 |
{
|
| 101 |
spin_lock(&global_cpu_lock); |
| 102 |
} |
| 103 |
|
| 104 |
void cpu_unlock(void) |
| 105 |
{
|
| 106 |
spin_unlock(&global_cpu_lock); |
| 107 |
} |
| 108 |
|
| 109 |
void cpu_loop_exit(void) |
| 110 |
{
|
| 111 |
/* NOTE: the register at this point must be saved by hand because
|
| 112 |
longjmp restore them */
|
| 113 |
regs_to_env(); |
| 114 |
longjmp(env->jmp_env, 1);
|
| 115 |
} |
| 116 |
|
| 117 |
/* return non zero if error */
|
| 118 |
static inline int load_segment(uint32_t *e1_ptr, uint32_t *e2_ptr, |
| 119 |
int selector)
|
| 120 |
{
|
| 121 |
SegmentCache *dt; |
| 122 |
int index;
|
| 123 |
target_ulong ptr; |
| 124 |
|
| 125 |
if (selector & 0x4) |
| 126 |
dt = &env->ldt; |
| 127 |
else
|
| 128 |
dt = &env->gdt; |
| 129 |
index = selector & ~7;
|
| 130 |
if ((index + 7) > dt->limit) |
| 131 |
return -1; |
| 132 |
ptr = dt->base + index; |
| 133 |
*e1_ptr = ldl_kernel(ptr); |
| 134 |
*e2_ptr = ldl_kernel(ptr + 4);
|
| 135 |
return 0; |
| 136 |
} |
| 137 |
|
| 138 |
static inline unsigned int get_seg_limit(uint32_t e1, uint32_t e2) |
| 139 |
{
|
| 140 |
unsigned int limit; |
| 141 |
limit = (e1 & 0xffff) | (e2 & 0x000f0000); |
| 142 |
if (e2 & DESC_G_MASK)
|
| 143 |
limit = (limit << 12) | 0xfff; |
| 144 |
return limit;
|
| 145 |
} |
| 146 |
|
| 147 |
static inline uint32_t get_seg_base(uint32_t e1, uint32_t e2) |
| 148 |
{
|
| 149 |
return ((e1 >> 16) | ((e2 & 0xff) << 16) | (e2 & 0xff000000)); |
| 150 |
} |
| 151 |
|
| 152 |
static inline void load_seg_cache_raw_dt(SegmentCache *sc, uint32_t e1, uint32_t e2) |
| 153 |
{
|
| 154 |
sc->base = get_seg_base(e1, e2); |
| 155 |
sc->limit = get_seg_limit(e1, e2); |
| 156 |
sc->flags = e2; |
| 157 |
} |
| 158 |
|
| 159 |
/* init the segment cache in vm86 mode. */
|
| 160 |
static inline void load_seg_vm(int seg, int selector) |
| 161 |
{
|
| 162 |
selector &= 0xffff;
|
| 163 |
cpu_x86_load_seg_cache(env, seg, selector, |
| 164 |
(selector << 4), 0xffff, 0); |
| 165 |
} |
| 166 |
|
| 167 |
static inline void get_ss_esp_from_tss(uint32_t *ss_ptr, |
| 168 |
uint32_t *esp_ptr, int dpl)
|
| 169 |
{
|
| 170 |
int type, index, shift;
|
| 171 |
|
| 172 |
#if 0
|
| 173 |
{
|
| 174 |
int i;
|
| 175 |
printf("TR: base=%p limit=%x\n", env->tr.base, env->tr.limit);
|
| 176 |
for(i=0;i<env->tr.limit;i++) {
|
| 177 |
printf("%02x ", env->tr.base[i]);
|
| 178 |
if ((i & 7) == 7) printf("\n");
|
| 179 |
}
|
| 180 |
printf("\n");
|
| 181 |
}
|
| 182 |
#endif
|
| 183 |
|
| 184 |
if (!(env->tr.flags & DESC_P_MASK))
|
| 185 |
cpu_abort(env, "invalid tss");
|
| 186 |
type = (env->tr.flags >> DESC_TYPE_SHIFT) & 0xf;
|
| 187 |
if ((type & 7) != 1) |
| 188 |
cpu_abort(env, "invalid tss type");
|
| 189 |
shift = type >> 3;
|
| 190 |
index = (dpl * 4 + 2) << shift; |
| 191 |
if (index + (4 << shift) - 1 > env->tr.limit) |
| 192 |
raise_exception_err(EXCP0A_TSS, env->tr.selector & 0xfffc);
|
| 193 |
if (shift == 0) { |
| 194 |
*esp_ptr = lduw_kernel(env->tr.base + index); |
| 195 |
*ss_ptr = lduw_kernel(env->tr.base + index + 2);
|
| 196 |
} else {
|
| 197 |
*esp_ptr = ldl_kernel(env->tr.base + index); |
| 198 |
*ss_ptr = lduw_kernel(env->tr.base + index + 4);
|
| 199 |
} |
| 200 |
} |
| 201 |
|
| 202 |
/* XXX: merge with load_seg() */
|
| 203 |
static void tss_load_seg(int seg_reg, int selector) |
| 204 |
{
|
| 205 |
uint32_t e1, e2; |
| 206 |
int rpl, dpl, cpl;
|
| 207 |
|
| 208 |
if ((selector & 0xfffc) != 0) { |
| 209 |
if (load_segment(&e1, &e2, selector) != 0) |
| 210 |
raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
|
| 211 |
if (!(e2 & DESC_S_MASK))
|
| 212 |
raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
|
| 213 |
rpl = selector & 3;
|
| 214 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 215 |
cpl = env->hflags & HF_CPL_MASK; |
| 216 |
if (seg_reg == R_CS) {
|
| 217 |
if (!(e2 & DESC_CS_MASK))
|
| 218 |
raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
|
| 219 |
/* XXX: is it correct ? */
|
| 220 |
if (dpl != rpl)
|
| 221 |
raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
|
| 222 |
if ((e2 & DESC_C_MASK) && dpl > rpl)
|
| 223 |
raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
|
| 224 |
} else if (seg_reg == R_SS) { |
| 225 |
/* SS must be writable data */
|
| 226 |
if ((e2 & DESC_CS_MASK) || !(e2 & DESC_W_MASK))
|
| 227 |
raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
|
| 228 |
if (dpl != cpl || dpl != rpl)
|
| 229 |
raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
|
| 230 |
} else {
|
| 231 |
/* not readable code */
|
| 232 |
if ((e2 & DESC_CS_MASK) && !(e2 & DESC_R_MASK))
|
| 233 |
raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
|
| 234 |
/* if data or non conforming code, checks the rights */
|
| 235 |
if (((e2 >> DESC_TYPE_SHIFT) & 0xf) < 12) { |
| 236 |
if (dpl < cpl || dpl < rpl)
|
| 237 |
raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
|
| 238 |
} |
| 239 |
} |
| 240 |
if (!(e2 & DESC_P_MASK))
|
| 241 |
raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc);
|
| 242 |
cpu_x86_load_seg_cache(env, seg_reg, selector, |
| 243 |
get_seg_base(e1, e2), |
| 244 |
get_seg_limit(e1, e2), |
| 245 |
e2); |
| 246 |
} else {
|
| 247 |
if (seg_reg == R_SS || seg_reg == R_CS)
|
| 248 |
raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
|
| 249 |
} |
| 250 |
} |
| 251 |
|
| 252 |
#define SWITCH_TSS_JMP 0 |
| 253 |
#define SWITCH_TSS_IRET 1 |
| 254 |
#define SWITCH_TSS_CALL 2 |
| 255 |
|
| 256 |
/* XXX: restore CPU state in registers (PowerPC case) */
|
| 257 |
static void switch_tss(int tss_selector, |
| 258 |
uint32_t e1, uint32_t e2, int source,
|
| 259 |
uint32_t next_eip) |
| 260 |
{
|
| 261 |
int tss_limit, tss_limit_max, type, old_tss_limit_max, old_type, v1, v2, i;
|
| 262 |
target_ulong tss_base; |
| 263 |
uint32_t new_regs[8], new_segs[6]; |
| 264 |
uint32_t new_eflags, new_eip, new_cr3, new_ldt, new_trap; |
| 265 |
uint32_t old_eflags, eflags_mask; |
| 266 |
SegmentCache *dt; |
| 267 |
int index;
|
| 268 |
target_ulong ptr; |
| 269 |
|
| 270 |
type = (e2 >> DESC_TYPE_SHIFT) & 0xf;
|
| 271 |
#ifdef DEBUG_PCALL
|
| 272 |
if (loglevel & CPU_LOG_PCALL)
|
| 273 |
fprintf(logfile, "switch_tss: sel=0x%04x type=%d src=%d\n", tss_selector, type, source);
|
| 274 |
#endif
|
| 275 |
|
| 276 |
/* if task gate, we read the TSS segment and we load it */
|
| 277 |
if (type == 5) { |
| 278 |
if (!(e2 & DESC_P_MASK))
|
| 279 |
raise_exception_err(EXCP0B_NOSEG, tss_selector & 0xfffc);
|
| 280 |
tss_selector = e1 >> 16;
|
| 281 |
if (tss_selector & 4) |
| 282 |
raise_exception_err(EXCP0A_TSS, tss_selector & 0xfffc);
|
| 283 |
if (load_segment(&e1, &e2, tss_selector) != 0) |
| 284 |
raise_exception_err(EXCP0D_GPF, tss_selector & 0xfffc);
|
| 285 |
if (e2 & DESC_S_MASK)
|
| 286 |
raise_exception_err(EXCP0D_GPF, tss_selector & 0xfffc);
|
| 287 |
type = (e2 >> DESC_TYPE_SHIFT) & 0xf;
|
| 288 |
if ((type & 7) != 1) |
| 289 |
raise_exception_err(EXCP0D_GPF, tss_selector & 0xfffc);
|
| 290 |
} |
| 291 |
|
| 292 |
if (!(e2 & DESC_P_MASK))
|
| 293 |
raise_exception_err(EXCP0B_NOSEG, tss_selector & 0xfffc);
|
| 294 |
|
| 295 |
if (type & 8) |
| 296 |
tss_limit_max = 103;
|
| 297 |
else
|
| 298 |
tss_limit_max = 43;
|
| 299 |
tss_limit = get_seg_limit(e1, e2); |
| 300 |
tss_base = get_seg_base(e1, e2); |
| 301 |
if ((tss_selector & 4) != 0 || |
| 302 |
tss_limit < tss_limit_max) |
| 303 |
raise_exception_err(EXCP0A_TSS, tss_selector & 0xfffc);
|
| 304 |
old_type = (env->tr.flags >> DESC_TYPE_SHIFT) & 0xf;
|
| 305 |
if (old_type & 8) |
| 306 |
old_tss_limit_max = 103;
|
| 307 |
else
|
| 308 |
old_tss_limit_max = 43;
|
| 309 |
|
| 310 |
/* read all the registers from the new TSS */
|
| 311 |
if (type & 8) { |
| 312 |
/* 32 bit */
|
| 313 |
new_cr3 = ldl_kernel(tss_base + 0x1c);
|
| 314 |
new_eip = ldl_kernel(tss_base + 0x20);
|
| 315 |
new_eflags = ldl_kernel(tss_base + 0x24);
|
| 316 |
for(i = 0; i < 8; i++) |
| 317 |
new_regs[i] = ldl_kernel(tss_base + (0x28 + i * 4)); |
| 318 |
for(i = 0; i < 6; i++) |
| 319 |
new_segs[i] = lduw_kernel(tss_base + (0x48 + i * 4)); |
| 320 |
new_ldt = lduw_kernel(tss_base + 0x60);
|
| 321 |
new_trap = ldl_kernel(tss_base + 0x64);
|
| 322 |
} else {
|
| 323 |
/* 16 bit */
|
| 324 |
new_cr3 = 0;
|
| 325 |
new_eip = lduw_kernel(tss_base + 0x0e);
|
| 326 |
new_eflags = lduw_kernel(tss_base + 0x10);
|
| 327 |
for(i = 0; i < 8; i++) |
| 328 |
new_regs[i] = lduw_kernel(tss_base + (0x12 + i * 2)) | 0xffff0000; |
| 329 |
for(i = 0; i < 4; i++) |
| 330 |
new_segs[i] = lduw_kernel(tss_base + (0x22 + i * 4)); |
| 331 |
new_ldt = lduw_kernel(tss_base + 0x2a);
|
| 332 |
new_segs[R_FS] = 0;
|
| 333 |
new_segs[R_GS] = 0;
|
| 334 |
new_trap = 0;
|
| 335 |
} |
| 336 |
|
| 337 |
/* NOTE: we must avoid memory exceptions during the task switch,
|
| 338 |
so we make dummy accesses before */
|
| 339 |
/* XXX: it can still fail in some cases, so a bigger hack is
|
| 340 |
necessary to valid the TLB after having done the accesses */
|
| 341 |
|
| 342 |
v1 = ldub_kernel(env->tr.base); |
| 343 |
v2 = ldub_kernel(env->tr.base + old_tss_limit_max); |
| 344 |
stb_kernel(env->tr.base, v1); |
| 345 |
stb_kernel(env->tr.base + old_tss_limit_max, v2); |
| 346 |
|
| 347 |
/* clear busy bit (it is restartable) */
|
| 348 |
if (source == SWITCH_TSS_JMP || source == SWITCH_TSS_IRET) {
|
| 349 |
target_ulong ptr; |
| 350 |
uint32_t e2; |
| 351 |
ptr = env->gdt.base + (env->tr.selector & ~7);
|
| 352 |
e2 = ldl_kernel(ptr + 4);
|
| 353 |
e2 &= ~DESC_TSS_BUSY_MASK; |
| 354 |
stl_kernel(ptr + 4, e2);
|
| 355 |
} |
| 356 |
old_eflags = compute_eflags(); |
| 357 |
if (source == SWITCH_TSS_IRET)
|
| 358 |
old_eflags &= ~NT_MASK; |
| 359 |
|
| 360 |
/* save the current state in the old TSS */
|
| 361 |
if (type & 8) { |
| 362 |
/* 32 bit */
|
| 363 |
stl_kernel(env->tr.base + 0x20, next_eip);
|
| 364 |
stl_kernel(env->tr.base + 0x24, old_eflags);
|
| 365 |
stl_kernel(env->tr.base + (0x28 + 0 * 4), EAX); |
| 366 |
stl_kernel(env->tr.base + (0x28 + 1 * 4), ECX); |
| 367 |
stl_kernel(env->tr.base + (0x28 + 2 * 4), EDX); |
| 368 |
stl_kernel(env->tr.base + (0x28 + 3 * 4), EBX); |
| 369 |
stl_kernel(env->tr.base + (0x28 + 4 * 4), ESP); |
| 370 |
stl_kernel(env->tr.base + (0x28 + 5 * 4), EBP); |
| 371 |
stl_kernel(env->tr.base + (0x28 + 6 * 4), ESI); |
| 372 |
stl_kernel(env->tr.base + (0x28 + 7 * 4), EDI); |
| 373 |
for(i = 0; i < 6; i++) |
| 374 |
stw_kernel(env->tr.base + (0x48 + i * 4), env->segs[i].selector); |
| 375 |
} else {
|
| 376 |
/* 16 bit */
|
| 377 |
stw_kernel(env->tr.base + 0x0e, next_eip);
|
| 378 |
stw_kernel(env->tr.base + 0x10, old_eflags);
|
| 379 |
stw_kernel(env->tr.base + (0x12 + 0 * 2), EAX); |
| 380 |
stw_kernel(env->tr.base + (0x12 + 1 * 2), ECX); |
| 381 |
stw_kernel(env->tr.base + (0x12 + 2 * 2), EDX); |
| 382 |
stw_kernel(env->tr.base + (0x12 + 3 * 2), EBX); |
| 383 |
stw_kernel(env->tr.base + (0x12 + 4 * 2), ESP); |
| 384 |
stw_kernel(env->tr.base + (0x12 + 5 * 2), EBP); |
| 385 |
stw_kernel(env->tr.base + (0x12 + 6 * 2), ESI); |
| 386 |
stw_kernel(env->tr.base + (0x12 + 7 * 2), EDI); |
| 387 |
for(i = 0; i < 4; i++) |
| 388 |
stw_kernel(env->tr.base + (0x22 + i * 4), env->segs[i].selector); |
| 389 |
} |
| 390 |
|
| 391 |
/* now if an exception occurs, it will occurs in the next task
|
| 392 |
context */
|
| 393 |
|
| 394 |
if (source == SWITCH_TSS_CALL) {
|
| 395 |
stw_kernel(tss_base, env->tr.selector); |
| 396 |
new_eflags |= NT_MASK; |
| 397 |
} |
| 398 |
|
| 399 |
/* set busy bit */
|
| 400 |
if (source == SWITCH_TSS_JMP || source == SWITCH_TSS_CALL) {
|
| 401 |
target_ulong ptr; |
| 402 |
uint32_t e2; |
| 403 |
ptr = env->gdt.base + (tss_selector & ~7);
|
| 404 |
e2 = ldl_kernel(ptr + 4);
|
| 405 |
e2 |= DESC_TSS_BUSY_MASK; |
| 406 |
stl_kernel(ptr + 4, e2);
|
| 407 |
} |
| 408 |
|
| 409 |
/* set the new CPU state */
|
| 410 |
/* from this point, any exception which occurs can give problems */
|
| 411 |
env->cr[0] |= CR0_TS_MASK;
|
| 412 |
env->hflags |= HF_TS_MASK; |
| 413 |
env->tr.selector = tss_selector; |
| 414 |
env->tr.base = tss_base; |
| 415 |
env->tr.limit = tss_limit; |
| 416 |
env->tr.flags = e2 & ~DESC_TSS_BUSY_MASK; |
| 417 |
|
| 418 |
if ((type & 8) && (env->cr[0] & CR0_PG_MASK)) { |
| 419 |
cpu_x86_update_cr3(env, new_cr3); |
| 420 |
} |
| 421 |
|
| 422 |
/* load all registers without an exception, then reload them with
|
| 423 |
possible exception */
|
| 424 |
env->eip = new_eip; |
| 425 |
eflags_mask = TF_MASK | AC_MASK | ID_MASK | |
| 426 |
IF_MASK | IOPL_MASK | VM_MASK | RF_MASK | NT_MASK; |
| 427 |
if (!(type & 8)) |
| 428 |
eflags_mask &= 0xffff;
|
| 429 |
load_eflags(new_eflags, eflags_mask); |
| 430 |
/* XXX: what to do in 16 bit case ? */
|
| 431 |
EAX = new_regs[0];
|
| 432 |
ECX = new_regs[1];
|
| 433 |
EDX = new_regs[2];
|
| 434 |
EBX = new_regs[3];
|
| 435 |
ESP = new_regs[4];
|
| 436 |
EBP = new_regs[5];
|
| 437 |
ESI = new_regs[6];
|
| 438 |
EDI = new_regs[7];
|
| 439 |
if (new_eflags & VM_MASK) {
|
| 440 |
for(i = 0; i < 6; i++) |
| 441 |
load_seg_vm(i, new_segs[i]); |
| 442 |
/* in vm86, CPL is always 3 */
|
| 443 |
cpu_x86_set_cpl(env, 3);
|
| 444 |
} else {
|
| 445 |
/* CPL is set the RPL of CS */
|
| 446 |
cpu_x86_set_cpl(env, new_segs[R_CS] & 3);
|
| 447 |
/* first just selectors as the rest may trigger exceptions */
|
| 448 |
for(i = 0; i < 6; i++) |
| 449 |
cpu_x86_load_seg_cache(env, i, new_segs[i], 0, 0, 0); |
| 450 |
} |
| 451 |
|
| 452 |
env->ldt.selector = new_ldt & ~4;
|
| 453 |
env->ldt.base = 0;
|
| 454 |
env->ldt.limit = 0;
|
| 455 |
env->ldt.flags = 0;
|
| 456 |
|
| 457 |
/* load the LDT */
|
| 458 |
if (new_ldt & 4) |
| 459 |
raise_exception_err(EXCP0A_TSS, new_ldt & 0xfffc);
|
| 460 |
|
| 461 |
if ((new_ldt & 0xfffc) != 0) { |
| 462 |
dt = &env->gdt; |
| 463 |
index = new_ldt & ~7;
|
| 464 |
if ((index + 7) > dt->limit) |
| 465 |
raise_exception_err(EXCP0A_TSS, new_ldt & 0xfffc);
|
| 466 |
ptr = dt->base + index; |
| 467 |
e1 = ldl_kernel(ptr); |
| 468 |
e2 = ldl_kernel(ptr + 4);
|
| 469 |
if ((e2 & DESC_S_MASK) || ((e2 >> DESC_TYPE_SHIFT) & 0xf) != 2) |
| 470 |
raise_exception_err(EXCP0A_TSS, new_ldt & 0xfffc);
|
| 471 |
if (!(e2 & DESC_P_MASK))
|
| 472 |
raise_exception_err(EXCP0A_TSS, new_ldt & 0xfffc);
|
| 473 |
load_seg_cache_raw_dt(&env->ldt, e1, e2); |
| 474 |
} |
| 475 |
|
| 476 |
/* load the segments */
|
| 477 |
if (!(new_eflags & VM_MASK)) {
|
| 478 |
tss_load_seg(R_CS, new_segs[R_CS]); |
| 479 |
tss_load_seg(R_SS, new_segs[R_SS]); |
| 480 |
tss_load_seg(R_ES, new_segs[R_ES]); |
| 481 |
tss_load_seg(R_DS, new_segs[R_DS]); |
| 482 |
tss_load_seg(R_FS, new_segs[R_FS]); |
| 483 |
tss_load_seg(R_GS, new_segs[R_GS]); |
| 484 |
} |
| 485 |
|
| 486 |
/* check that EIP is in the CS segment limits */
|
| 487 |
if (new_eip > env->segs[R_CS].limit) {
|
| 488 |
/* XXX: different exception if CALL ? */
|
| 489 |
raise_exception_err(EXCP0D_GPF, 0);
|
| 490 |
} |
| 491 |
} |
| 492 |
|
| 493 |
/* check if Port I/O is allowed in TSS */
|
| 494 |
static inline void check_io(int addr, int size) |
| 495 |
{
|
| 496 |
int io_offset, val, mask;
|
| 497 |
|
| 498 |
/* TSS must be a valid 32 bit one */
|
| 499 |
if (!(env->tr.flags & DESC_P_MASK) ||
|
| 500 |
((env->tr.flags >> DESC_TYPE_SHIFT) & 0xf) != 9 || |
| 501 |
env->tr.limit < 103)
|
| 502 |
goto fail;
|
| 503 |
io_offset = lduw_kernel(env->tr.base + 0x66);
|
| 504 |
io_offset += (addr >> 3);
|
| 505 |
/* Note: the check needs two bytes */
|
| 506 |
if ((io_offset + 1) > env->tr.limit) |
| 507 |
goto fail;
|
| 508 |
val = lduw_kernel(env->tr.base + io_offset); |
| 509 |
val >>= (addr & 7);
|
| 510 |
mask = (1 << size) - 1; |
| 511 |
/* all bits must be zero to allow the I/O */
|
| 512 |
if ((val & mask) != 0) { |
| 513 |
fail:
|
| 514 |
raise_exception_err(EXCP0D_GPF, 0);
|
| 515 |
} |
| 516 |
} |
| 517 |
|
| 518 |
void check_iob_T0(void) |
| 519 |
{
|
| 520 |
check_io(T0, 1);
|
| 521 |
} |
| 522 |
|
| 523 |
void check_iow_T0(void) |
| 524 |
{
|
| 525 |
check_io(T0, 2);
|
| 526 |
} |
| 527 |
|
| 528 |
void check_iol_T0(void) |
| 529 |
{
|
| 530 |
check_io(T0, 4);
|
| 531 |
} |
| 532 |
|
| 533 |
void check_iob_DX(void) |
| 534 |
{
|
| 535 |
check_io(EDX & 0xffff, 1); |
| 536 |
} |
| 537 |
|
| 538 |
void check_iow_DX(void) |
| 539 |
{
|
| 540 |
check_io(EDX & 0xffff, 2); |
| 541 |
} |
| 542 |
|
| 543 |
void check_iol_DX(void) |
| 544 |
{
|
| 545 |
check_io(EDX & 0xffff, 4); |
| 546 |
} |
| 547 |
|
| 548 |
static inline unsigned int get_sp_mask(unsigned int e2) |
| 549 |
{
|
| 550 |
if (e2 & DESC_B_MASK)
|
| 551 |
return 0xffffffff; |
| 552 |
else
|
| 553 |
return 0xffff; |
| 554 |
} |
| 555 |
|
| 556 |
#ifdef TARGET_X86_64
|
| 557 |
#define SET_ESP(val, sp_mask)\
|
| 558 |
do {\
|
| 559 |
if ((sp_mask) == 0xffff)\ |
| 560 |
ESP = (ESP & ~0xffff) | ((val) & 0xffff);\ |
| 561 |
else if ((sp_mask) == 0xffffffffLL)\ |
| 562 |
ESP = (uint32_t)(val);\ |
| 563 |
else\
|
| 564 |
ESP = (val);\ |
| 565 |
} while (0) |
| 566 |
#else
|
| 567 |
#define SET_ESP(val, sp_mask) ESP = (ESP & ~(sp_mask)) | ((val) & (sp_mask))
|
| 568 |
#endif
|
| 569 |
|
| 570 |
/* XXX: add a is_user flag to have proper security support */
|
| 571 |
#define PUSHW(ssp, sp, sp_mask, val)\
|
| 572 |
{\
|
| 573 |
sp -= 2;\
|
| 574 |
stw_kernel((ssp) + (sp & (sp_mask)), (val));\ |
| 575 |
} |
| 576 |
|
| 577 |
#define PUSHL(ssp, sp, sp_mask, val)\
|
| 578 |
{\
|
| 579 |
sp -= 4;\
|
| 580 |
stl_kernel((ssp) + (sp & (sp_mask)), (val));\ |
| 581 |
} |
| 582 |
|
| 583 |
#define POPW(ssp, sp, sp_mask, val)\
|
| 584 |
{\
|
| 585 |
val = lduw_kernel((ssp) + (sp & (sp_mask)));\ |
| 586 |
sp += 2;\
|
| 587 |
} |
| 588 |
|
| 589 |
#define POPL(ssp, sp, sp_mask, val)\
|
| 590 |
{\
|
| 591 |
val = (uint32_t)ldl_kernel((ssp) + (sp & (sp_mask)));\ |
| 592 |
sp += 4;\
|
| 593 |
} |
| 594 |
|
| 595 |
/* protected mode interrupt */
|
| 596 |
static void do_interrupt_protected(int intno, int is_int, int error_code, |
| 597 |
unsigned int next_eip, int is_hw) |
| 598 |
{
|
| 599 |
SegmentCache *dt; |
| 600 |
target_ulong ptr, ssp; |
| 601 |
int type, dpl, selector, ss_dpl, cpl;
|
| 602 |
int has_error_code, new_stack, shift;
|
| 603 |
uint32_t e1, e2, offset, ss, esp, ss_e1, ss_e2; |
| 604 |
uint32_t old_eip, sp_mask; |
| 605 |
|
| 606 |
has_error_code = 0;
|
| 607 |
if (!is_int && !is_hw) {
|
| 608 |
switch(intno) {
|
| 609 |
case 8: |
| 610 |
case 10: |
| 611 |
case 11: |
| 612 |
case 12: |
| 613 |
case 13: |
| 614 |
case 14: |
| 615 |
case 17: |
| 616 |
has_error_code = 1;
|
| 617 |
break;
|
| 618 |
} |
| 619 |
} |
| 620 |
if (is_int)
|
| 621 |
old_eip = next_eip; |
| 622 |
else
|
| 623 |
old_eip = env->eip; |
| 624 |
|
| 625 |
dt = &env->idt; |
| 626 |
if (intno * 8 + 7 > dt->limit) |
| 627 |
raise_exception_err(EXCP0D_GPF, intno * 8 + 2); |
| 628 |
ptr = dt->base + intno * 8;
|
| 629 |
e1 = ldl_kernel(ptr); |
| 630 |
e2 = ldl_kernel(ptr + 4);
|
| 631 |
/* check gate type */
|
| 632 |
type = (e2 >> DESC_TYPE_SHIFT) & 0x1f;
|
| 633 |
switch(type) {
|
| 634 |
case 5: /* task gate */ |
| 635 |
/* must do that check here to return the correct error code */
|
| 636 |
if (!(e2 & DESC_P_MASK))
|
| 637 |
raise_exception_err(EXCP0B_NOSEG, intno * 8 + 2); |
| 638 |
switch_tss(intno * 8, e1, e2, SWITCH_TSS_CALL, old_eip);
|
| 639 |
if (has_error_code) {
|
| 640 |
int type;
|
| 641 |
uint32_t mask; |
| 642 |
/* push the error code */
|
| 643 |
type = (env->tr.flags >> DESC_TYPE_SHIFT) & 0xf;
|
| 644 |
shift = type >> 3;
|
| 645 |
if (env->segs[R_SS].flags & DESC_B_MASK)
|
| 646 |
mask = 0xffffffff;
|
| 647 |
else
|
| 648 |
mask = 0xffff;
|
| 649 |
esp = (ESP - (2 << shift)) & mask;
|
| 650 |
ssp = env->segs[R_SS].base + esp; |
| 651 |
if (shift)
|
| 652 |
stl_kernel(ssp, error_code); |
| 653 |
else
|
| 654 |
stw_kernel(ssp, error_code); |
| 655 |
SET_ESP(esp, mask); |
| 656 |
} |
| 657 |
return;
|
| 658 |
case 6: /* 286 interrupt gate */ |
| 659 |
case 7: /* 286 trap gate */ |
| 660 |
case 14: /* 386 interrupt gate */ |
| 661 |
case 15: /* 386 trap gate */ |
| 662 |
break;
|
| 663 |
default:
|
| 664 |
raise_exception_err(EXCP0D_GPF, intno * 8 + 2); |
| 665 |
break;
|
| 666 |
} |
| 667 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 668 |
cpl = env->hflags & HF_CPL_MASK; |
| 669 |
/* check privledge if software int */
|
| 670 |
if (is_int && dpl < cpl)
|
| 671 |
raise_exception_err(EXCP0D_GPF, intno * 8 + 2); |
| 672 |
/* check valid bit */
|
| 673 |
if (!(e2 & DESC_P_MASK))
|
| 674 |
raise_exception_err(EXCP0B_NOSEG, intno * 8 + 2); |
| 675 |
selector = e1 >> 16;
|
| 676 |
offset = (e2 & 0xffff0000) | (e1 & 0x0000ffff); |
| 677 |
if ((selector & 0xfffc) == 0) |
| 678 |
raise_exception_err(EXCP0D_GPF, 0);
|
| 679 |
|
| 680 |
if (load_segment(&e1, &e2, selector) != 0) |
| 681 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 682 |
if (!(e2 & DESC_S_MASK) || !(e2 & (DESC_CS_MASK)))
|
| 683 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 684 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 685 |
if (dpl > cpl)
|
| 686 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 687 |
if (!(e2 & DESC_P_MASK))
|
| 688 |
raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc);
|
| 689 |
if (!(e2 & DESC_C_MASK) && dpl < cpl) {
|
| 690 |
/* to inner priviledge */
|
| 691 |
get_ss_esp_from_tss(&ss, &esp, dpl); |
| 692 |
if ((ss & 0xfffc) == 0) |
| 693 |
raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
| 694 |
if ((ss & 3) != dpl) |
| 695 |
raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
| 696 |
if (load_segment(&ss_e1, &ss_e2, ss) != 0) |
| 697 |
raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
| 698 |
ss_dpl = (ss_e2 >> DESC_DPL_SHIFT) & 3;
|
| 699 |
if (ss_dpl != dpl)
|
| 700 |
raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
| 701 |
if (!(ss_e2 & DESC_S_MASK) ||
|
| 702 |
(ss_e2 & DESC_CS_MASK) || |
| 703 |
!(ss_e2 & DESC_W_MASK)) |
| 704 |
raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
| 705 |
if (!(ss_e2 & DESC_P_MASK))
|
| 706 |
raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
| 707 |
new_stack = 1;
|
| 708 |
sp_mask = get_sp_mask(ss_e2); |
| 709 |
ssp = get_seg_base(ss_e1, ss_e2); |
| 710 |
} else if ((e2 & DESC_C_MASK) || dpl == cpl) { |
| 711 |
/* to same priviledge */
|
| 712 |
if (env->eflags & VM_MASK)
|
| 713 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 714 |
new_stack = 0;
|
| 715 |
sp_mask = get_sp_mask(env->segs[R_SS].flags); |
| 716 |
ssp = env->segs[R_SS].base; |
| 717 |
esp = ESP; |
| 718 |
dpl = cpl; |
| 719 |
} else {
|
| 720 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 721 |
new_stack = 0; /* avoid warning */ |
| 722 |
sp_mask = 0; /* avoid warning */ |
| 723 |
ssp = 0; /* avoid warning */ |
| 724 |
esp = 0; /* avoid warning */ |
| 725 |
} |
| 726 |
|
| 727 |
shift = type >> 3;
|
| 728 |
|
| 729 |
#if 0
|
| 730 |
/* XXX: check that enough room is available */
|
| 731 |
push_size = 6 + (new_stack << 2) + (has_error_code << 1);
|
| 732 |
if (env->eflags & VM_MASK)
|
| 733 |
push_size += 8;
|
| 734 |
push_size <<= shift;
|
| 735 |
#endif
|
| 736 |
if (shift == 1) { |
| 737 |
if (new_stack) {
|
| 738 |
if (env->eflags & VM_MASK) {
|
| 739 |
PUSHL(ssp, esp, sp_mask, env->segs[R_GS].selector); |
| 740 |
PUSHL(ssp, esp, sp_mask, env->segs[R_FS].selector); |
| 741 |
PUSHL(ssp, esp, sp_mask, env->segs[R_DS].selector); |
| 742 |
PUSHL(ssp, esp, sp_mask, env->segs[R_ES].selector); |
| 743 |
} |
| 744 |
PUSHL(ssp, esp, sp_mask, env->segs[R_SS].selector); |
| 745 |
PUSHL(ssp, esp, sp_mask, ESP); |
| 746 |
} |
| 747 |
PUSHL(ssp, esp, sp_mask, compute_eflags()); |
| 748 |
PUSHL(ssp, esp, sp_mask, env->segs[R_CS].selector); |
| 749 |
PUSHL(ssp, esp, sp_mask, old_eip); |
| 750 |
if (has_error_code) {
|
| 751 |
PUSHL(ssp, esp, sp_mask, error_code); |
| 752 |
} |
| 753 |
} else {
|
| 754 |
if (new_stack) {
|
| 755 |
if (env->eflags & VM_MASK) {
|
| 756 |
PUSHW(ssp, esp, sp_mask, env->segs[R_GS].selector); |
| 757 |
PUSHW(ssp, esp, sp_mask, env->segs[R_FS].selector); |
| 758 |
PUSHW(ssp, esp, sp_mask, env->segs[R_DS].selector); |
| 759 |
PUSHW(ssp, esp, sp_mask, env->segs[R_ES].selector); |
| 760 |
} |
| 761 |
PUSHW(ssp, esp, sp_mask, env->segs[R_SS].selector); |
| 762 |
PUSHW(ssp, esp, sp_mask, ESP); |
| 763 |
} |
| 764 |
PUSHW(ssp, esp, sp_mask, compute_eflags()); |
| 765 |
PUSHW(ssp, esp, sp_mask, env->segs[R_CS].selector); |
| 766 |
PUSHW(ssp, esp, sp_mask, old_eip); |
| 767 |
if (has_error_code) {
|
| 768 |
PUSHW(ssp, esp, sp_mask, error_code); |
| 769 |
} |
| 770 |
} |
| 771 |
|
| 772 |
if (new_stack) {
|
| 773 |
if (env->eflags & VM_MASK) {
|
| 774 |
cpu_x86_load_seg_cache(env, R_ES, 0, 0, 0, 0); |
| 775 |
cpu_x86_load_seg_cache(env, R_DS, 0, 0, 0, 0); |
| 776 |
cpu_x86_load_seg_cache(env, R_FS, 0, 0, 0, 0); |
| 777 |
cpu_x86_load_seg_cache(env, R_GS, 0, 0, 0, 0); |
| 778 |
} |
| 779 |
ss = (ss & ~3) | dpl;
|
| 780 |
cpu_x86_load_seg_cache(env, R_SS, ss, |
| 781 |
ssp, get_seg_limit(ss_e1, ss_e2), ss_e2); |
| 782 |
} |
| 783 |
SET_ESP(esp, sp_mask); |
| 784 |
|
| 785 |
selector = (selector & ~3) | dpl;
|
| 786 |
cpu_x86_load_seg_cache(env, R_CS, selector, |
| 787 |
get_seg_base(e1, e2), |
| 788 |
get_seg_limit(e1, e2), |
| 789 |
e2); |
| 790 |
cpu_x86_set_cpl(env, dpl); |
| 791 |
env->eip = offset; |
| 792 |
|
| 793 |
/* interrupt gate clear IF mask */
|
| 794 |
if ((type & 1) == 0) { |
| 795 |
env->eflags &= ~IF_MASK; |
| 796 |
} |
| 797 |
env->eflags &= ~(TF_MASK | VM_MASK | RF_MASK | NT_MASK); |
| 798 |
} |
| 799 |
|
| 800 |
#ifdef TARGET_X86_64
|
| 801 |
|
| 802 |
#define PUSHQ(sp, val)\
|
| 803 |
{\
|
| 804 |
sp -= 8;\
|
| 805 |
stq_kernel(sp, (val));\ |
| 806 |
} |
| 807 |
|
| 808 |
#define POPQ(sp, val)\
|
| 809 |
{\
|
| 810 |
val = ldq_kernel(sp);\ |
| 811 |
sp += 8;\
|
| 812 |
} |
| 813 |
|
| 814 |
static inline target_ulong get_rsp_from_tss(int level) |
| 815 |
{
|
| 816 |
int index;
|
| 817 |
|
| 818 |
#if 0
|
| 819 |
printf("TR: base=" TARGET_FMT_lx " limit=%x\n",
|
| 820 |
env->tr.base, env->tr.limit);
|
| 821 |
#endif
|
| 822 |
|
| 823 |
if (!(env->tr.flags & DESC_P_MASK))
|
| 824 |
cpu_abort(env, "invalid tss");
|
| 825 |
index = 8 * level + 4; |
| 826 |
if ((index + 7) > env->tr.limit) |
| 827 |
raise_exception_err(EXCP0A_TSS, env->tr.selector & 0xfffc);
|
| 828 |
return ldq_kernel(env->tr.base + index);
|
| 829 |
} |
| 830 |
|
| 831 |
/* 64 bit interrupt */
|
| 832 |
static void do_interrupt64(int intno, int is_int, int error_code, |
| 833 |
target_ulong next_eip, int is_hw)
|
| 834 |
{
|
| 835 |
SegmentCache *dt; |
| 836 |
target_ulong ptr; |
| 837 |
int type, dpl, selector, cpl, ist;
|
| 838 |
int has_error_code, new_stack;
|
| 839 |
uint32_t e1, e2, e3, ss; |
| 840 |
target_ulong old_eip, esp, offset; |
| 841 |
|
| 842 |
has_error_code = 0;
|
| 843 |
if (!is_int && !is_hw) {
|
| 844 |
switch(intno) {
|
| 845 |
case 8: |
| 846 |
case 10: |
| 847 |
case 11: |
| 848 |
case 12: |
| 849 |
case 13: |
| 850 |
case 14: |
| 851 |
case 17: |
| 852 |
has_error_code = 1;
|
| 853 |
break;
|
| 854 |
} |
| 855 |
} |
| 856 |
if (is_int)
|
| 857 |
old_eip = next_eip; |
| 858 |
else
|
| 859 |
old_eip = env->eip; |
| 860 |
|
| 861 |
dt = &env->idt; |
| 862 |
if (intno * 16 + 15 > dt->limit) |
| 863 |
raise_exception_err(EXCP0D_GPF, intno * 16 + 2); |
| 864 |
ptr = dt->base + intno * 16;
|
| 865 |
e1 = ldl_kernel(ptr); |
| 866 |
e2 = ldl_kernel(ptr + 4);
|
| 867 |
e3 = ldl_kernel(ptr + 8);
|
| 868 |
/* check gate type */
|
| 869 |
type = (e2 >> DESC_TYPE_SHIFT) & 0x1f;
|
| 870 |
switch(type) {
|
| 871 |
case 14: /* 386 interrupt gate */ |
| 872 |
case 15: /* 386 trap gate */ |
| 873 |
break;
|
| 874 |
default:
|
| 875 |
raise_exception_err(EXCP0D_GPF, intno * 16 + 2); |
| 876 |
break;
|
| 877 |
} |
| 878 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 879 |
cpl = env->hflags & HF_CPL_MASK; |
| 880 |
/* check privledge if software int */
|
| 881 |
if (is_int && dpl < cpl)
|
| 882 |
raise_exception_err(EXCP0D_GPF, intno * 16 + 2); |
| 883 |
/* check valid bit */
|
| 884 |
if (!(e2 & DESC_P_MASK))
|
| 885 |
raise_exception_err(EXCP0B_NOSEG, intno * 16 + 2); |
| 886 |
selector = e1 >> 16;
|
| 887 |
offset = ((target_ulong)e3 << 32) | (e2 & 0xffff0000) | (e1 & 0x0000ffff); |
| 888 |
ist = e2 & 7;
|
| 889 |
if ((selector & 0xfffc) == 0) |
| 890 |
raise_exception_err(EXCP0D_GPF, 0);
|
| 891 |
|
| 892 |
if (load_segment(&e1, &e2, selector) != 0) |
| 893 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 894 |
if (!(e2 & DESC_S_MASK) || !(e2 & (DESC_CS_MASK)))
|
| 895 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 896 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 897 |
if (dpl > cpl)
|
| 898 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 899 |
if (!(e2 & DESC_P_MASK))
|
| 900 |
raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc);
|
| 901 |
if (!(e2 & DESC_L_MASK) || (e2 & DESC_B_MASK))
|
| 902 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 903 |
if ((!(e2 & DESC_C_MASK) && dpl < cpl) || ist != 0) { |
| 904 |
/* to inner priviledge */
|
| 905 |
if (ist != 0) |
| 906 |
esp = get_rsp_from_tss(ist + 3);
|
| 907 |
else
|
| 908 |
esp = get_rsp_from_tss(dpl); |
| 909 |
esp &= ~0xfLL; /* align stack */ |
| 910 |
ss = 0;
|
| 911 |
new_stack = 1;
|
| 912 |
} else if ((e2 & DESC_C_MASK) || dpl == cpl) { |
| 913 |
/* to same priviledge */
|
| 914 |
if (env->eflags & VM_MASK)
|
| 915 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 916 |
new_stack = 0;
|
| 917 |
if (ist != 0) |
| 918 |
esp = get_rsp_from_tss(ist + 3);
|
| 919 |
else
|
| 920 |
esp = ESP; |
| 921 |
esp &= ~0xfLL; /* align stack */ |
| 922 |
dpl = cpl; |
| 923 |
} else {
|
| 924 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 925 |
new_stack = 0; /* avoid warning */ |
| 926 |
esp = 0; /* avoid warning */ |
| 927 |
} |
| 928 |
|
| 929 |
PUSHQ(esp, env->segs[R_SS].selector); |
| 930 |
PUSHQ(esp, ESP); |
| 931 |
PUSHQ(esp, compute_eflags()); |
| 932 |
PUSHQ(esp, env->segs[R_CS].selector); |
| 933 |
PUSHQ(esp, old_eip); |
| 934 |
if (has_error_code) {
|
| 935 |
PUSHQ(esp, error_code); |
| 936 |
} |
| 937 |
|
| 938 |
if (new_stack) {
|
| 939 |
ss = 0 | dpl;
|
| 940 |
cpu_x86_load_seg_cache(env, R_SS, ss, 0, 0, 0); |
| 941 |
} |
| 942 |
ESP = esp; |
| 943 |
|
| 944 |
selector = (selector & ~3) | dpl;
|
| 945 |
cpu_x86_load_seg_cache(env, R_CS, selector, |
| 946 |
get_seg_base(e1, e2), |
| 947 |
get_seg_limit(e1, e2), |
| 948 |
e2); |
| 949 |
cpu_x86_set_cpl(env, dpl); |
| 950 |
env->eip = offset; |
| 951 |
|
| 952 |
/* interrupt gate clear IF mask */
|
| 953 |
if ((type & 1) == 0) { |
| 954 |
env->eflags &= ~IF_MASK; |
| 955 |
} |
| 956 |
env->eflags &= ~(TF_MASK | VM_MASK | RF_MASK | NT_MASK); |
| 957 |
} |
| 958 |
#endif
|
| 959 |
|
| 960 |
void helper_syscall(int next_eip_addend) |
| 961 |
{
|
| 962 |
int selector;
|
| 963 |
|
| 964 |
if (!(env->efer & MSR_EFER_SCE)) {
|
| 965 |
raise_exception_err(EXCP06_ILLOP, 0);
|
| 966 |
} |
| 967 |
selector = (env->star >> 32) & 0xffff; |
| 968 |
#ifdef TARGET_X86_64
|
| 969 |
if (env->hflags & HF_LMA_MASK) {
|
| 970 |
int code64;
|
| 971 |
|
| 972 |
ECX = env->eip + next_eip_addend; |
| 973 |
env->regs[11] = compute_eflags();
|
| 974 |
|
| 975 |
code64 = env->hflags & HF_CS64_MASK; |
| 976 |
|
| 977 |
cpu_x86_set_cpl(env, 0);
|
| 978 |
cpu_x86_load_seg_cache(env, R_CS, selector & 0xfffc,
|
| 979 |
0, 0xffffffff, |
| 980 |
DESC_G_MASK | DESC_P_MASK | |
| 981 |
DESC_S_MASK | |
| 982 |
DESC_CS_MASK | DESC_R_MASK | DESC_A_MASK | DESC_L_MASK); |
| 983 |
cpu_x86_load_seg_cache(env, R_SS, (selector + 8) & 0xfffc, |
| 984 |
0, 0xffffffff, |
| 985 |
DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | |
| 986 |
DESC_S_MASK | |
| 987 |
DESC_W_MASK | DESC_A_MASK); |
| 988 |
env->eflags &= ~env->fmask; |
| 989 |
if (code64)
|
| 990 |
env->eip = env->lstar; |
| 991 |
else
|
| 992 |
env->eip = env->cstar; |
| 993 |
} else
|
| 994 |
#endif
|
| 995 |
{
|
| 996 |
ECX = (uint32_t)(env->eip + next_eip_addend); |
| 997 |
|
| 998 |
cpu_x86_set_cpl(env, 0);
|
| 999 |
cpu_x86_load_seg_cache(env, R_CS, selector & 0xfffc,
|
| 1000 |
0, 0xffffffff, |
| 1001 |
DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | |
| 1002 |
DESC_S_MASK | |
| 1003 |
DESC_CS_MASK | DESC_R_MASK | DESC_A_MASK); |
| 1004 |
cpu_x86_load_seg_cache(env, R_SS, (selector + 8) & 0xfffc, |
| 1005 |
0, 0xffffffff, |
| 1006 |
DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | |
| 1007 |
DESC_S_MASK | |
| 1008 |
DESC_W_MASK | DESC_A_MASK); |
| 1009 |
env->eflags &= ~(IF_MASK | RF_MASK | VM_MASK); |
| 1010 |
env->eip = (uint32_t)env->star; |
| 1011 |
} |
| 1012 |
} |
| 1013 |
|
| 1014 |
void helper_sysret(int dflag) |
| 1015 |
{
|
| 1016 |
int cpl, selector;
|
| 1017 |
|
| 1018 |
if (!(env->efer & MSR_EFER_SCE)) {
|
| 1019 |
raise_exception_err(EXCP06_ILLOP, 0);
|
| 1020 |
} |
| 1021 |
cpl = env->hflags & HF_CPL_MASK; |
| 1022 |
if (!(env->cr[0] & CR0_PE_MASK) || cpl != 0) { |
| 1023 |
raise_exception_err(EXCP0D_GPF, 0);
|
| 1024 |
} |
| 1025 |
selector = (env->star >> 48) & 0xffff; |
| 1026 |
#ifdef TARGET_X86_64
|
| 1027 |
if (env->hflags & HF_LMA_MASK) {
|
| 1028 |
if (dflag == 2) { |
| 1029 |
cpu_x86_load_seg_cache(env, R_CS, (selector + 16) | 3, |
| 1030 |
0, 0xffffffff, |
| 1031 |
DESC_G_MASK | DESC_P_MASK | |
| 1032 |
DESC_S_MASK | (3 << DESC_DPL_SHIFT) |
|
| 1033 |
DESC_CS_MASK | DESC_R_MASK | DESC_A_MASK | |
| 1034 |
DESC_L_MASK); |
| 1035 |
env->eip = ECX; |
| 1036 |
} else {
|
| 1037 |
cpu_x86_load_seg_cache(env, R_CS, selector | 3,
|
| 1038 |
0, 0xffffffff, |
| 1039 |
DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | |
| 1040 |
DESC_S_MASK | (3 << DESC_DPL_SHIFT) |
|
| 1041 |
DESC_CS_MASK | DESC_R_MASK | DESC_A_MASK); |
| 1042 |
env->eip = (uint32_t)ECX; |
| 1043 |
} |
| 1044 |
cpu_x86_load_seg_cache(env, R_SS, selector + 8,
|
| 1045 |
0, 0xffffffff, |
| 1046 |
DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | |
| 1047 |
DESC_S_MASK | (3 << DESC_DPL_SHIFT) |
|
| 1048 |
DESC_W_MASK | DESC_A_MASK); |
| 1049 |
load_eflags((uint32_t)(env->regs[11]), TF_MASK | AC_MASK | ID_MASK |
|
| 1050 |
IF_MASK | IOPL_MASK | VM_MASK | RF_MASK | NT_MASK); |
| 1051 |
cpu_x86_set_cpl(env, 3);
|
| 1052 |
} else
|
| 1053 |
#endif
|
| 1054 |
{
|
| 1055 |
cpu_x86_load_seg_cache(env, R_CS, selector | 3,
|
| 1056 |
0, 0xffffffff, |
| 1057 |
DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | |
| 1058 |
DESC_S_MASK | (3 << DESC_DPL_SHIFT) |
|
| 1059 |
DESC_CS_MASK | DESC_R_MASK | DESC_A_MASK); |
| 1060 |
env->eip = (uint32_t)ECX; |
| 1061 |
cpu_x86_load_seg_cache(env, R_SS, selector + 8,
|
| 1062 |
0, 0xffffffff, |
| 1063 |
DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | |
| 1064 |
DESC_S_MASK | (3 << DESC_DPL_SHIFT) |
|
| 1065 |
DESC_W_MASK | DESC_A_MASK); |
| 1066 |
env->eflags |= IF_MASK; |
| 1067 |
cpu_x86_set_cpl(env, 3);
|
| 1068 |
} |
| 1069 |
#ifdef USE_KQEMU
|
| 1070 |
if (kqemu_is_ok(env)) {
|
| 1071 |
if (env->hflags & HF_LMA_MASK)
|
| 1072 |
CC_OP = CC_OP_EFLAGS; |
| 1073 |
env->exception_index = -1;
|
| 1074 |
cpu_loop_exit(); |
| 1075 |
} |
| 1076 |
#endif
|
| 1077 |
} |
| 1078 |
|
| 1079 |
/* real mode interrupt */
|
| 1080 |
static void do_interrupt_real(int intno, int is_int, int error_code, |
| 1081 |
unsigned int next_eip) |
| 1082 |
{
|
| 1083 |
SegmentCache *dt; |
| 1084 |
target_ulong ptr, ssp; |
| 1085 |
int selector;
|
| 1086 |
uint32_t offset, esp; |
| 1087 |
uint32_t old_cs, old_eip; |
| 1088 |
|
| 1089 |
/* real mode (simpler !) */
|
| 1090 |
dt = &env->idt; |
| 1091 |
if (intno * 4 + 3 > dt->limit) |
| 1092 |
raise_exception_err(EXCP0D_GPF, intno * 8 + 2); |
| 1093 |
ptr = dt->base + intno * 4;
|
| 1094 |
offset = lduw_kernel(ptr); |
| 1095 |
selector = lduw_kernel(ptr + 2);
|
| 1096 |
esp = ESP; |
| 1097 |
ssp = env->segs[R_SS].base; |
| 1098 |
if (is_int)
|
| 1099 |
old_eip = next_eip; |
| 1100 |
else
|
| 1101 |
old_eip = env->eip; |
| 1102 |
old_cs = env->segs[R_CS].selector; |
| 1103 |
/* XXX: use SS segment size ? */
|
| 1104 |
PUSHW(ssp, esp, 0xffff, compute_eflags());
|
| 1105 |
PUSHW(ssp, esp, 0xffff, old_cs);
|
| 1106 |
PUSHW(ssp, esp, 0xffff, old_eip);
|
| 1107 |
|
| 1108 |
/* update processor state */
|
| 1109 |
ESP = (ESP & ~0xffff) | (esp & 0xffff); |
| 1110 |
env->eip = offset; |
| 1111 |
env->segs[R_CS].selector = selector; |
| 1112 |
env->segs[R_CS].base = (selector << 4);
|
| 1113 |
env->eflags &= ~(IF_MASK | TF_MASK | AC_MASK | RF_MASK); |
| 1114 |
} |
| 1115 |
|
| 1116 |
/* fake user mode interrupt */
|
| 1117 |
void do_interrupt_user(int intno, int is_int, int error_code, |
| 1118 |
target_ulong next_eip) |
| 1119 |
{
|
| 1120 |
SegmentCache *dt; |
| 1121 |
target_ulong ptr; |
| 1122 |
int dpl, cpl;
|
| 1123 |
uint32_t e2; |
| 1124 |
|
| 1125 |
dt = &env->idt; |
| 1126 |
ptr = dt->base + (intno * 8);
|
| 1127 |
e2 = ldl_kernel(ptr + 4);
|
| 1128 |
|
| 1129 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 1130 |
cpl = env->hflags & HF_CPL_MASK; |
| 1131 |
/* check privledge if software int */
|
| 1132 |
if (is_int && dpl < cpl)
|
| 1133 |
raise_exception_err(EXCP0D_GPF, intno * 8 + 2); |
| 1134 |
|
| 1135 |
/* Since we emulate only user space, we cannot do more than
|
| 1136 |
exiting the emulation with the suitable exception and error
|
| 1137 |
code */
|
| 1138 |
if (is_int)
|
| 1139 |
EIP = next_eip; |
| 1140 |
} |
| 1141 |
|
| 1142 |
/*
|
| 1143 |
* Begin execution of an interruption. is_int is TRUE if coming from
|
| 1144 |
* the int instruction. next_eip is the EIP value AFTER the interrupt
|
| 1145 |
* instruction. It is only relevant if is_int is TRUE.
|
| 1146 |
*/
|
| 1147 |
void do_interrupt(int intno, int is_int, int error_code, |
| 1148 |
target_ulong next_eip, int is_hw)
|
| 1149 |
{
|
| 1150 |
if (loglevel & CPU_LOG_INT) {
|
| 1151 |
if ((env->cr[0] & CR0_PE_MASK)) { |
| 1152 |
static int count; |
| 1153 |
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, |
| 1154 |
count, intno, error_code, is_int, |
| 1155 |
env->hflags & HF_CPL_MASK, |
| 1156 |
env->segs[R_CS].selector, EIP, |
| 1157 |
(int)env->segs[R_CS].base + EIP,
|
| 1158 |
env->segs[R_SS].selector, ESP); |
| 1159 |
if (intno == 0x0e) { |
| 1160 |
fprintf(logfile, " CR2=" TARGET_FMT_lx, env->cr[2]); |
| 1161 |
} else {
|
| 1162 |
fprintf(logfile, " EAX=" TARGET_FMT_lx, EAX);
|
| 1163 |
} |
| 1164 |
fprintf(logfile, "\n");
|
| 1165 |
cpu_dump_state(env, logfile, fprintf, X86_DUMP_CCOP); |
| 1166 |
#if 0
|
| 1167 |
{
|
| 1168 |
int i;
|
| 1169 |
uint8_t *ptr;
|
| 1170 |
fprintf(logfile, " code=");
|
| 1171 |
ptr = env->segs[R_CS].base + env->eip;
|
| 1172 |
for(i = 0; i < 16; i++) {
|
| 1173 |
fprintf(logfile, " %02x", ldub(ptr + i));
|
| 1174 |
}
|
| 1175 |
fprintf(logfile, "\n");
|
| 1176 |
}
|
| 1177 |
#endif
|
| 1178 |
count++; |
| 1179 |
} |
| 1180 |
} |
| 1181 |
if (env->cr[0] & CR0_PE_MASK) { |
| 1182 |
#if TARGET_X86_64
|
| 1183 |
if (env->hflags & HF_LMA_MASK) {
|
| 1184 |
do_interrupt64(intno, is_int, error_code, next_eip, is_hw); |
| 1185 |
} else
|
| 1186 |
#endif
|
| 1187 |
{
|
| 1188 |
do_interrupt_protected(intno, is_int, error_code, next_eip, is_hw); |
| 1189 |
} |
| 1190 |
} else {
|
| 1191 |
do_interrupt_real(intno, is_int, error_code, next_eip); |
| 1192 |
} |
| 1193 |
} |
| 1194 |
|
| 1195 |
/*
|
| 1196 |
* Check nested exceptions and change to double or triple fault if
|
| 1197 |
* needed. It should only be called, if this is not an interrupt.
|
| 1198 |
* Returns the new exception number.
|
| 1199 |
*/
|
| 1200 |
int check_exception(int intno, int *error_code) |
| 1201 |
{
|
| 1202 |
char first_contributory = env->old_exception == 0 || |
| 1203 |
(env->old_exception >= 10 &&
|
| 1204 |
env->old_exception <= 13);
|
| 1205 |
char second_contributory = intno == 0 || |
| 1206 |
(intno >= 10 && intno <= 13); |
| 1207 |
|
| 1208 |
if (loglevel & CPU_LOG_INT)
|
| 1209 |
fprintf(logfile, "check_exception old: %x new %x\n",
|
| 1210 |
env->old_exception, intno); |
| 1211 |
|
| 1212 |
if (env->old_exception == EXCP08_DBLE)
|
| 1213 |
cpu_abort(env, "triple fault");
|
| 1214 |
|
| 1215 |
if ((first_contributory && second_contributory)
|
| 1216 |
|| (env->old_exception == EXCP0E_PAGE && |
| 1217 |
(second_contributory || (intno == EXCP0E_PAGE)))) {
|
| 1218 |
intno = EXCP08_DBLE; |
| 1219 |
*error_code = 0;
|
| 1220 |
} |
| 1221 |
|
| 1222 |
if (second_contributory || (intno == EXCP0E_PAGE) ||
|
| 1223 |
(intno == EXCP08_DBLE)) |
| 1224 |
env->old_exception = intno; |
| 1225 |
|
| 1226 |
return intno;
|
| 1227 |
} |
| 1228 |
|
| 1229 |
/*
|
| 1230 |
* Signal an interruption. It is executed in the main CPU loop.
|
| 1231 |
* is_int is TRUE if coming from the int instruction. next_eip is the
|
| 1232 |
* EIP value AFTER the interrupt instruction. It is only relevant if
|
| 1233 |
* is_int is TRUE.
|
| 1234 |
*/
|
| 1235 |
void raise_interrupt(int intno, int is_int, int error_code, |
| 1236 |
int next_eip_addend)
|
| 1237 |
{
|
| 1238 |
if (!is_int)
|
| 1239 |
intno = check_exception(intno, &error_code); |
| 1240 |
|
| 1241 |
env->exception_index = intno; |
| 1242 |
env->error_code = error_code; |
| 1243 |
env->exception_is_int = is_int; |
| 1244 |
env->exception_next_eip = env->eip + next_eip_addend; |
| 1245 |
cpu_loop_exit(); |
| 1246 |
} |
| 1247 |
|
| 1248 |
/* same as raise_exception_err, but do not restore global registers */
|
| 1249 |
static void raise_exception_err_norestore(int exception_index, int error_code) |
| 1250 |
{
|
| 1251 |
exception_index = check_exception(exception_index, &error_code); |
| 1252 |
|
| 1253 |
env->exception_index = exception_index; |
| 1254 |
env->error_code = error_code; |
| 1255 |
env->exception_is_int = 0;
|
| 1256 |
env->exception_next_eip = 0;
|
| 1257 |
longjmp(env->jmp_env, 1);
|
| 1258 |
} |
| 1259 |
|
| 1260 |
/* shortcuts to generate exceptions */
|
| 1261 |
|
| 1262 |
void (raise_exception_err)(int exception_index, int error_code) |
| 1263 |
{
|
| 1264 |
raise_interrupt(exception_index, 0, error_code, 0); |
| 1265 |
} |
| 1266 |
|
| 1267 |
void raise_exception(int exception_index) |
| 1268 |
{
|
| 1269 |
raise_interrupt(exception_index, 0, 0, 0); |
| 1270 |
} |
| 1271 |
|
| 1272 |
/* SMM support */
|
| 1273 |
|
| 1274 |
#if defined(CONFIG_USER_ONLY)
|
| 1275 |
|
| 1276 |
void do_smm_enter(void) |
| 1277 |
{
|
| 1278 |
} |
| 1279 |
|
| 1280 |
void helper_rsm(void) |
| 1281 |
{
|
| 1282 |
} |
| 1283 |
|
| 1284 |
#else
|
| 1285 |
|
| 1286 |
#ifdef TARGET_X86_64
|
| 1287 |
#define SMM_REVISION_ID 0x00020064 |
| 1288 |
#else
|
| 1289 |
#define SMM_REVISION_ID 0x00020000 |
| 1290 |
#endif
|
| 1291 |
|
| 1292 |
void do_smm_enter(void) |
| 1293 |
{
|
| 1294 |
target_ulong sm_state; |
| 1295 |
SegmentCache *dt; |
| 1296 |
int i, offset;
|
| 1297 |
|
| 1298 |
if (loglevel & CPU_LOG_INT) {
|
| 1299 |
fprintf(logfile, "SMM: enter\n");
|
| 1300 |
cpu_dump_state(env, logfile, fprintf, X86_DUMP_CCOP); |
| 1301 |
} |
| 1302 |
|
| 1303 |
env->hflags |= HF_SMM_MASK; |
| 1304 |
cpu_smm_update(env); |
| 1305 |
|
| 1306 |
sm_state = env->smbase + 0x8000;
|
| 1307 |
|
| 1308 |
#ifdef TARGET_X86_64
|
| 1309 |
for(i = 0; i < 6; i++) { |
| 1310 |
dt = &env->segs[i]; |
| 1311 |
offset = 0x7e00 + i * 16; |
| 1312 |
stw_phys(sm_state + offset, dt->selector); |
| 1313 |
stw_phys(sm_state + offset + 2, (dt->flags >> 8) & 0xf0ff); |
| 1314 |
stl_phys(sm_state + offset + 4, dt->limit);
|
| 1315 |
stq_phys(sm_state + offset + 8, dt->base);
|
| 1316 |
} |
| 1317 |
|
| 1318 |
stq_phys(sm_state + 0x7e68, env->gdt.base);
|
| 1319 |
stl_phys(sm_state + 0x7e64, env->gdt.limit);
|
| 1320 |
|
| 1321 |
stw_phys(sm_state + 0x7e70, env->ldt.selector);
|
| 1322 |
stq_phys(sm_state + 0x7e78, env->ldt.base);
|
| 1323 |
stl_phys(sm_state + 0x7e74, env->ldt.limit);
|
| 1324 |
stw_phys(sm_state + 0x7e72, (env->ldt.flags >> 8) & 0xf0ff); |
| 1325 |
|
| 1326 |
stq_phys(sm_state + 0x7e88, env->idt.base);
|
| 1327 |
stl_phys(sm_state + 0x7e84, env->idt.limit);
|
| 1328 |
|
| 1329 |
stw_phys(sm_state + 0x7e90, env->tr.selector);
|
| 1330 |
stq_phys(sm_state + 0x7e98, env->tr.base);
|
| 1331 |
stl_phys(sm_state + 0x7e94, env->tr.limit);
|
| 1332 |
stw_phys(sm_state + 0x7e92, (env->tr.flags >> 8) & 0xf0ff); |
| 1333 |
|
| 1334 |
stq_phys(sm_state + 0x7ed0, env->efer);
|
| 1335 |
|
| 1336 |
stq_phys(sm_state + 0x7ff8, EAX);
|
| 1337 |
stq_phys(sm_state + 0x7ff0, ECX);
|
| 1338 |
stq_phys(sm_state + 0x7fe8, EDX);
|
| 1339 |
stq_phys(sm_state + 0x7fe0, EBX);
|
| 1340 |
stq_phys(sm_state + 0x7fd8, ESP);
|
| 1341 |
stq_phys(sm_state + 0x7fd0, EBP);
|
| 1342 |
stq_phys(sm_state + 0x7fc8, ESI);
|
| 1343 |
stq_phys(sm_state + 0x7fc0, EDI);
|
| 1344 |
for(i = 8; i < 16; i++) |
| 1345 |
stq_phys(sm_state + 0x7ff8 - i * 8, env->regs[i]); |
| 1346 |
stq_phys(sm_state + 0x7f78, env->eip);
|
| 1347 |
stl_phys(sm_state + 0x7f70, compute_eflags());
|
| 1348 |
stl_phys(sm_state + 0x7f68, env->dr[6]); |
| 1349 |
stl_phys(sm_state + 0x7f60, env->dr[7]); |
| 1350 |
|
| 1351 |
stl_phys(sm_state + 0x7f48, env->cr[4]); |
| 1352 |
stl_phys(sm_state + 0x7f50, env->cr[3]); |
| 1353 |
stl_phys(sm_state + 0x7f58, env->cr[0]); |
| 1354 |
|
| 1355 |
stl_phys(sm_state + 0x7efc, SMM_REVISION_ID);
|
| 1356 |
stl_phys(sm_state + 0x7f00, env->smbase);
|
| 1357 |
#else
|
| 1358 |
stl_phys(sm_state + 0x7ffc, env->cr[0]); |
| 1359 |
stl_phys(sm_state + 0x7ff8, env->cr[3]); |
| 1360 |
stl_phys(sm_state + 0x7ff4, compute_eflags());
|
| 1361 |
stl_phys(sm_state + 0x7ff0, env->eip);
|
| 1362 |
stl_phys(sm_state + 0x7fec, EDI);
|
| 1363 |
stl_phys(sm_state + 0x7fe8, ESI);
|
| 1364 |
stl_phys(sm_state + 0x7fe4, EBP);
|
| 1365 |
stl_phys(sm_state + 0x7fe0, ESP);
|
| 1366 |
stl_phys(sm_state + 0x7fdc, EBX);
|
| 1367 |
stl_phys(sm_state + 0x7fd8, EDX);
|
| 1368 |
stl_phys(sm_state + 0x7fd4, ECX);
|
| 1369 |
stl_phys(sm_state + 0x7fd0, EAX);
|
| 1370 |
stl_phys(sm_state + 0x7fcc, env->dr[6]); |
| 1371 |
stl_phys(sm_state + 0x7fc8, env->dr[7]); |
| 1372 |
|
| 1373 |
stl_phys(sm_state + 0x7fc4, env->tr.selector);
|
| 1374 |
stl_phys(sm_state + 0x7f64, env->tr.base);
|
| 1375 |
stl_phys(sm_state + 0x7f60, env->tr.limit);
|
| 1376 |
stl_phys(sm_state + 0x7f5c, (env->tr.flags >> 8) & 0xf0ff); |
| 1377 |
|
| 1378 |
stl_phys(sm_state + 0x7fc0, env->ldt.selector);
|
| 1379 |
stl_phys(sm_state + 0x7f80, env->ldt.base);
|
| 1380 |
stl_phys(sm_state + 0x7f7c, env->ldt.limit);
|
| 1381 |
stl_phys(sm_state + 0x7f78, (env->ldt.flags >> 8) & 0xf0ff); |
| 1382 |
|
| 1383 |
stl_phys(sm_state + 0x7f74, env->gdt.base);
|
| 1384 |
stl_phys(sm_state + 0x7f70, env->gdt.limit);
|
| 1385 |
|
| 1386 |
stl_phys(sm_state + 0x7f58, env->idt.base);
|
| 1387 |
stl_phys(sm_state + 0x7f54, env->idt.limit);
|
| 1388 |
|
| 1389 |
for(i = 0; i < 6; i++) { |
| 1390 |
dt = &env->segs[i]; |
| 1391 |
if (i < 3) |
| 1392 |
offset = 0x7f84 + i * 12; |
| 1393 |
else
|
| 1394 |
offset = 0x7f2c + (i - 3) * 12; |
| 1395 |
stl_phys(sm_state + 0x7fa8 + i * 4, dt->selector); |
| 1396 |
stl_phys(sm_state + offset + 8, dt->base);
|
| 1397 |
stl_phys(sm_state + offset + 4, dt->limit);
|
| 1398 |
stl_phys(sm_state + offset, (dt->flags >> 8) & 0xf0ff); |
| 1399 |
} |
| 1400 |
stl_phys(sm_state + 0x7f14, env->cr[4]); |
| 1401 |
|
| 1402 |
stl_phys(sm_state + 0x7efc, SMM_REVISION_ID);
|
| 1403 |
stl_phys(sm_state + 0x7ef8, env->smbase);
|
| 1404 |
#endif
|
| 1405 |
/* init SMM cpu state */
|
| 1406 |
|
| 1407 |
#ifdef TARGET_X86_64
|
| 1408 |
env->efer = 0;
|
| 1409 |
env->hflags &= ~HF_LMA_MASK; |
| 1410 |
#endif
|
| 1411 |
load_eflags(0, ~(CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C | DF_MASK));
|
| 1412 |
env->eip = 0x00008000;
|
| 1413 |
cpu_x86_load_seg_cache(env, R_CS, (env->smbase >> 4) & 0xffff, env->smbase, |
| 1414 |
0xffffffff, 0); |
| 1415 |
cpu_x86_load_seg_cache(env, R_DS, 0, 0, 0xffffffff, 0); |
| 1416 |
cpu_x86_load_seg_cache(env, R_ES, 0, 0, 0xffffffff, 0); |
| 1417 |
cpu_x86_load_seg_cache(env, R_SS, 0, 0, 0xffffffff, 0); |
| 1418 |
cpu_x86_load_seg_cache(env, R_FS, 0, 0, 0xffffffff, 0); |
| 1419 |
cpu_x86_load_seg_cache(env, R_GS, 0, 0, 0xffffffff, 0); |
| 1420 |
|
| 1421 |
cpu_x86_update_cr0(env, |
| 1422 |
env->cr[0] & ~(CR0_PE_MASK | CR0_EM_MASK | CR0_TS_MASK | CR0_PG_MASK));
|
| 1423 |
cpu_x86_update_cr4(env, 0);
|
| 1424 |
env->dr[7] = 0x00000400; |
| 1425 |
CC_OP = CC_OP_EFLAGS; |
| 1426 |
} |
| 1427 |
|
| 1428 |
void helper_rsm(void) |
| 1429 |
{
|
| 1430 |
target_ulong sm_state; |
| 1431 |
int i, offset;
|
| 1432 |
uint32_t val; |
| 1433 |
|
| 1434 |
sm_state = env->smbase + 0x8000;
|
| 1435 |
#ifdef TARGET_X86_64
|
| 1436 |
env->efer = ldq_phys(sm_state + 0x7ed0);
|
| 1437 |
if (env->efer & MSR_EFER_LMA)
|
| 1438 |
env->hflags |= HF_LMA_MASK; |
| 1439 |
else
|
| 1440 |
env->hflags &= ~HF_LMA_MASK; |
| 1441 |
|
| 1442 |
for(i = 0; i < 6; i++) { |
| 1443 |
offset = 0x7e00 + i * 16; |
| 1444 |
cpu_x86_load_seg_cache(env, i, |
| 1445 |
lduw_phys(sm_state + offset), |
| 1446 |
ldq_phys(sm_state + offset + 8),
|
| 1447 |
ldl_phys(sm_state + offset + 4),
|
| 1448 |
(lduw_phys(sm_state + offset + 2) & 0xf0ff) << 8); |
| 1449 |
} |
| 1450 |
|
| 1451 |
env->gdt.base = ldq_phys(sm_state + 0x7e68);
|
| 1452 |
env->gdt.limit = ldl_phys(sm_state + 0x7e64);
|
| 1453 |
|
| 1454 |
env->ldt.selector = lduw_phys(sm_state + 0x7e70);
|
| 1455 |
env->ldt.base = ldq_phys(sm_state + 0x7e78);
|
| 1456 |
env->ldt.limit = ldl_phys(sm_state + 0x7e74);
|
| 1457 |
env->ldt.flags = (lduw_phys(sm_state + 0x7e72) & 0xf0ff) << 8; |
| 1458 |
|
| 1459 |
env->idt.base = ldq_phys(sm_state + 0x7e88);
|
| 1460 |
env->idt.limit = ldl_phys(sm_state + 0x7e84);
|
| 1461 |
|
| 1462 |
env->tr.selector = lduw_phys(sm_state + 0x7e90);
|
| 1463 |
env->tr.base = ldq_phys(sm_state + 0x7e98);
|
| 1464 |
env->tr.limit = ldl_phys(sm_state + 0x7e94);
|
| 1465 |
env->tr.flags = (lduw_phys(sm_state + 0x7e92) & 0xf0ff) << 8; |
| 1466 |
|
| 1467 |
EAX = ldq_phys(sm_state + 0x7ff8);
|
| 1468 |
ECX = ldq_phys(sm_state + 0x7ff0);
|
| 1469 |
EDX = ldq_phys(sm_state + 0x7fe8);
|
| 1470 |
EBX = ldq_phys(sm_state + 0x7fe0);
|
| 1471 |
ESP = ldq_phys(sm_state + 0x7fd8);
|
| 1472 |
EBP = ldq_phys(sm_state + 0x7fd0);
|
| 1473 |
ESI = ldq_phys(sm_state + 0x7fc8);
|
| 1474 |
EDI = ldq_phys(sm_state + 0x7fc0);
|
| 1475 |
for(i = 8; i < 16; i++) |
| 1476 |
env->regs[i] = ldq_phys(sm_state + 0x7ff8 - i * 8); |
| 1477 |
env->eip = ldq_phys(sm_state + 0x7f78);
|
| 1478 |
load_eflags(ldl_phys(sm_state + 0x7f70),
|
| 1479 |
~(CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C | DF_MASK)); |
| 1480 |
env->dr[6] = ldl_phys(sm_state + 0x7f68); |
| 1481 |
env->dr[7] = ldl_phys(sm_state + 0x7f60); |
| 1482 |
|
| 1483 |
cpu_x86_update_cr4(env, ldl_phys(sm_state + 0x7f48));
|
| 1484 |
cpu_x86_update_cr3(env, ldl_phys(sm_state + 0x7f50));
|
| 1485 |
cpu_x86_update_cr0(env, ldl_phys(sm_state + 0x7f58));
|
| 1486 |
|
| 1487 |
val = ldl_phys(sm_state + 0x7efc); /* revision ID */ |
| 1488 |
if (val & 0x20000) { |
| 1489 |
env->smbase = ldl_phys(sm_state + 0x7f00) & ~0x7fff; |
| 1490 |
} |
| 1491 |
#else
|
| 1492 |
cpu_x86_update_cr0(env, ldl_phys(sm_state + 0x7ffc));
|
| 1493 |
cpu_x86_update_cr3(env, ldl_phys(sm_state + 0x7ff8));
|
| 1494 |
load_eflags(ldl_phys(sm_state + 0x7ff4),
|
| 1495 |
~(CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C | DF_MASK)); |
| 1496 |
env->eip = ldl_phys(sm_state + 0x7ff0);
|
| 1497 |
EDI = ldl_phys(sm_state + 0x7fec);
|
| 1498 |
ESI = ldl_phys(sm_state + 0x7fe8);
|
| 1499 |
EBP = ldl_phys(sm_state + 0x7fe4);
|
| 1500 |
ESP = ldl_phys(sm_state + 0x7fe0);
|
| 1501 |
EBX = ldl_phys(sm_state + 0x7fdc);
|
| 1502 |
EDX = ldl_phys(sm_state + 0x7fd8);
|
| 1503 |
ECX = ldl_phys(sm_state + 0x7fd4);
|
| 1504 |
EAX = ldl_phys(sm_state + 0x7fd0);
|
| 1505 |
env->dr[6] = ldl_phys(sm_state + 0x7fcc); |
| 1506 |
env->dr[7] = ldl_phys(sm_state + 0x7fc8); |
| 1507 |
|
| 1508 |
env->tr.selector = ldl_phys(sm_state + 0x7fc4) & 0xffff; |
| 1509 |
env->tr.base = ldl_phys(sm_state + 0x7f64);
|
| 1510 |
env->tr.limit = ldl_phys(sm_state + 0x7f60);
|
| 1511 |
env->tr.flags = (ldl_phys(sm_state + 0x7f5c) & 0xf0ff) << 8; |
| 1512 |
|
| 1513 |
env->ldt.selector = ldl_phys(sm_state + 0x7fc0) & 0xffff; |
| 1514 |
env->ldt.base = ldl_phys(sm_state + 0x7f80);
|
| 1515 |
env->ldt.limit = ldl_phys(sm_state + 0x7f7c);
|
| 1516 |
env->ldt.flags = (ldl_phys(sm_state + 0x7f78) & 0xf0ff) << 8; |
| 1517 |
|
| 1518 |
env->gdt.base = ldl_phys(sm_state + 0x7f74);
|
| 1519 |
env->gdt.limit = ldl_phys(sm_state + 0x7f70);
|
| 1520 |
|
| 1521 |
env->idt.base = ldl_phys(sm_state + 0x7f58);
|
| 1522 |
env->idt.limit = ldl_phys(sm_state + 0x7f54);
|
| 1523 |
|
| 1524 |
for(i = 0; i < 6; i++) { |
| 1525 |
if (i < 3) |
| 1526 |
offset = 0x7f84 + i * 12; |
| 1527 |
else
|
| 1528 |
offset = 0x7f2c + (i - 3) * 12; |
| 1529 |
cpu_x86_load_seg_cache(env, i, |
| 1530 |
ldl_phys(sm_state + 0x7fa8 + i * 4) & 0xffff, |
| 1531 |
ldl_phys(sm_state + offset + 8),
|
| 1532 |
ldl_phys(sm_state + offset + 4),
|
| 1533 |
(ldl_phys(sm_state + offset) & 0xf0ff) << 8); |
| 1534 |
} |
| 1535 |
cpu_x86_update_cr4(env, ldl_phys(sm_state + 0x7f14));
|
| 1536 |
|
| 1537 |
val = ldl_phys(sm_state + 0x7efc); /* revision ID */ |
| 1538 |
if (val & 0x20000) { |
| 1539 |
env->smbase = ldl_phys(sm_state + 0x7ef8) & ~0x7fff; |
| 1540 |
} |
| 1541 |
#endif
|
| 1542 |
CC_OP = CC_OP_EFLAGS; |
| 1543 |
env->hflags &= ~HF_SMM_MASK; |
| 1544 |
cpu_smm_update(env); |
| 1545 |
|
| 1546 |
if (loglevel & CPU_LOG_INT) {
|
| 1547 |
fprintf(logfile, "SMM: after RSM\n");
|
| 1548 |
cpu_dump_state(env, logfile, fprintf, X86_DUMP_CCOP); |
| 1549 |
} |
| 1550 |
} |
| 1551 |
|
| 1552 |
#endif /* !CONFIG_USER_ONLY */ |
| 1553 |
|
| 1554 |
|
| 1555 |
#ifdef BUGGY_GCC_DIV64
|
| 1556 |
/* gcc 2.95.4 on PowerPC does not seem to like using __udivdi3, so we
|
| 1557 |
call it from another function */
|
| 1558 |
uint32_t div32(uint64_t *q_ptr, uint64_t num, uint32_t den) |
| 1559 |
{
|
| 1560 |
*q_ptr = num / den; |
| 1561 |
return num % den;
|
| 1562 |
} |
| 1563 |
|
| 1564 |
int32_t idiv32(int64_t *q_ptr, int64_t num, int32_t den) |
| 1565 |
{
|
| 1566 |
*q_ptr = num / den; |
| 1567 |
return num % den;
|
| 1568 |
} |
| 1569 |
#endif
|
| 1570 |
|
| 1571 |
void helper_divl_EAX_T0(void) |
| 1572 |
{
|
| 1573 |
unsigned int den, r; |
| 1574 |
uint64_t num, q; |
| 1575 |
|
| 1576 |
num = ((uint32_t)EAX) | ((uint64_t)((uint32_t)EDX) << 32);
|
| 1577 |
den = T0; |
| 1578 |
if (den == 0) { |
| 1579 |
raise_exception(EXCP00_DIVZ); |
| 1580 |
} |
| 1581 |
#ifdef BUGGY_GCC_DIV64
|
| 1582 |
r = div32(&q, num, den); |
| 1583 |
#else
|
| 1584 |
q = (num / den); |
| 1585 |
r = (num % den); |
| 1586 |
#endif
|
| 1587 |
if (q > 0xffffffff) |
| 1588 |
raise_exception(EXCP00_DIVZ); |
| 1589 |
EAX = (uint32_t)q; |
| 1590 |
EDX = (uint32_t)r; |
| 1591 |
} |
| 1592 |
|
| 1593 |
void helper_idivl_EAX_T0(void) |
| 1594 |
{
|
| 1595 |
int den, r;
|
| 1596 |
int64_t num, q; |
| 1597 |
|
| 1598 |
num = ((uint32_t)EAX) | ((uint64_t)((uint32_t)EDX) << 32);
|
| 1599 |
den = T0; |
| 1600 |
if (den == 0) { |
| 1601 |
raise_exception(EXCP00_DIVZ); |
| 1602 |
} |
| 1603 |
#ifdef BUGGY_GCC_DIV64
|
| 1604 |
r = idiv32(&q, num, den); |
| 1605 |
#else
|
| 1606 |
q = (num / den); |
| 1607 |
r = (num % den); |
| 1608 |
#endif
|
| 1609 |
if (q != (int32_t)q)
|
| 1610 |
raise_exception(EXCP00_DIVZ); |
| 1611 |
EAX = (uint32_t)q; |
| 1612 |
EDX = (uint32_t)r; |
| 1613 |
} |
| 1614 |
|
| 1615 |
void helper_cmpxchg8b(void) |
| 1616 |
{
|
| 1617 |
uint64_t d; |
| 1618 |
int eflags;
|
| 1619 |
|
| 1620 |
eflags = cc_table[CC_OP].compute_all(); |
| 1621 |
d = ldq(A0); |
| 1622 |
if (d == (((uint64_t)EDX << 32) | EAX)) { |
| 1623 |
stq(A0, ((uint64_t)ECX << 32) | EBX);
|
| 1624 |
eflags |= CC_Z; |
| 1625 |
} else {
|
| 1626 |
EDX = d >> 32;
|
| 1627 |
EAX = d; |
| 1628 |
eflags &= ~CC_Z; |
| 1629 |
} |
| 1630 |
CC_SRC = eflags; |
| 1631 |
} |
| 1632 |
|
| 1633 |
void helper_cpuid(void) |
| 1634 |
{
|
| 1635 |
uint32_t index; |
| 1636 |
index = (uint32_t)EAX; |
| 1637 |
|
| 1638 |
/* test if maximum index reached */
|
| 1639 |
if (index & 0x80000000) { |
| 1640 |
if (index > env->cpuid_xlevel)
|
| 1641 |
index = env->cpuid_level; |
| 1642 |
} else {
|
| 1643 |
if (index > env->cpuid_level)
|
| 1644 |
index = env->cpuid_level; |
| 1645 |
} |
| 1646 |
|
| 1647 |
switch(index) {
|
| 1648 |
case 0: |
| 1649 |
EAX = env->cpuid_level; |
| 1650 |
EBX = env->cpuid_vendor1; |
| 1651 |
EDX = env->cpuid_vendor2; |
| 1652 |
ECX = env->cpuid_vendor3; |
| 1653 |
break;
|
| 1654 |
case 1: |
| 1655 |
EAX = env->cpuid_version; |
| 1656 |
EBX = (env->cpuid_apic_id << 24) | 8 << 8; /* CLFLUSH size in quad words, Linux wants it. */ |
| 1657 |
ECX = env->cpuid_ext_features; |
| 1658 |
EDX = env->cpuid_features; |
| 1659 |
break;
|
| 1660 |
case 2: |
| 1661 |
/* cache info: needed for Pentium Pro compatibility */
|
| 1662 |
EAX = 0x410601;
|
| 1663 |
EBX = 0;
|
| 1664 |
ECX = 0;
|
| 1665 |
EDX = 0;
|
| 1666 |
break;
|
| 1667 |
case 0x80000000: |
| 1668 |
EAX = env->cpuid_xlevel; |
| 1669 |
EBX = env->cpuid_vendor1; |
| 1670 |
EDX = env->cpuid_vendor2; |
| 1671 |
ECX = env->cpuid_vendor3; |
| 1672 |
break;
|
| 1673 |
case 0x80000001: |
| 1674 |
EAX = env->cpuid_features; |
| 1675 |
EBX = 0;
|
| 1676 |
ECX = 0;
|
| 1677 |
EDX = env->cpuid_ext2_features; |
| 1678 |
break;
|
| 1679 |
case 0x80000002: |
| 1680 |
case 0x80000003: |
| 1681 |
case 0x80000004: |
| 1682 |
EAX = env->cpuid_model[(index - 0x80000002) * 4 + 0]; |
| 1683 |
EBX = env->cpuid_model[(index - 0x80000002) * 4 + 1]; |
| 1684 |
ECX = env->cpuid_model[(index - 0x80000002) * 4 + 2]; |
| 1685 |
EDX = env->cpuid_model[(index - 0x80000002) * 4 + 3]; |
| 1686 |
break;
|
| 1687 |
case 0x80000005: |
| 1688 |
/* cache info (L1 cache) */
|
| 1689 |
EAX = 0x01ff01ff;
|
| 1690 |
EBX = 0x01ff01ff;
|
| 1691 |
ECX = 0x40020140;
|
| 1692 |
EDX = 0x40020140;
|
| 1693 |
break;
|
| 1694 |
case 0x80000006: |
| 1695 |
/* cache info (L2 cache) */
|
| 1696 |
EAX = 0;
|
| 1697 |
EBX = 0x42004200;
|
| 1698 |
ECX = 0x02008140;
|
| 1699 |
EDX = 0;
|
| 1700 |
break;
|
| 1701 |
case 0x80000008: |
| 1702 |
/* virtual & phys address size in low 2 bytes. */
|
| 1703 |
EAX = 0x00003028;
|
| 1704 |
EBX = 0;
|
| 1705 |
ECX = 0;
|
| 1706 |
EDX = 0;
|
| 1707 |
break;
|
| 1708 |
default:
|
| 1709 |
/* reserved values: zero */
|
| 1710 |
EAX = 0;
|
| 1711 |
EBX = 0;
|
| 1712 |
ECX = 0;
|
| 1713 |
EDX = 0;
|
| 1714 |
break;
|
| 1715 |
} |
| 1716 |
} |
| 1717 |
|
| 1718 |
void helper_enter_level(int level, int data32) |
| 1719 |
{
|
| 1720 |
target_ulong ssp; |
| 1721 |
uint32_t esp_mask, esp, ebp; |
| 1722 |
|
| 1723 |
esp_mask = get_sp_mask(env->segs[R_SS].flags); |
| 1724 |
ssp = env->segs[R_SS].base; |
| 1725 |
ebp = EBP; |
| 1726 |
esp = ESP; |
| 1727 |
if (data32) {
|
| 1728 |
/* 32 bit */
|
| 1729 |
esp -= 4;
|
| 1730 |
while (--level) {
|
| 1731 |
esp -= 4;
|
| 1732 |
ebp -= 4;
|
| 1733 |
stl(ssp + (esp & esp_mask), ldl(ssp + (ebp & esp_mask))); |
| 1734 |
} |
| 1735 |
esp -= 4;
|
| 1736 |
stl(ssp + (esp & esp_mask), T1); |
| 1737 |
} else {
|
| 1738 |
/* 16 bit */
|
| 1739 |
esp -= 2;
|
| 1740 |
while (--level) {
|
| 1741 |
esp -= 2;
|
| 1742 |
ebp -= 2;
|
| 1743 |
stw(ssp + (esp & esp_mask), lduw(ssp + (ebp & esp_mask))); |
| 1744 |
} |
| 1745 |
esp -= 2;
|
| 1746 |
stw(ssp + (esp & esp_mask), T1); |
| 1747 |
} |
| 1748 |
} |
| 1749 |
|
| 1750 |
#ifdef TARGET_X86_64
|
| 1751 |
void helper_enter64_level(int level, int data64) |
| 1752 |
{
|
| 1753 |
target_ulong esp, ebp; |
| 1754 |
ebp = EBP; |
| 1755 |
esp = ESP; |
| 1756 |
|
| 1757 |
if (data64) {
|
| 1758 |
/* 64 bit */
|
| 1759 |
esp -= 8;
|
| 1760 |
while (--level) {
|
| 1761 |
esp -= 8;
|
| 1762 |
ebp -= 8;
|
| 1763 |
stq(esp, ldq(ebp)); |
| 1764 |
} |
| 1765 |
esp -= 8;
|
| 1766 |
stq(esp, T1); |
| 1767 |
} else {
|
| 1768 |
/* 16 bit */
|
| 1769 |
esp -= 2;
|
| 1770 |
while (--level) {
|
| 1771 |
esp -= 2;
|
| 1772 |
ebp -= 2;
|
| 1773 |
stw(esp, lduw(ebp)); |
| 1774 |
} |
| 1775 |
esp -= 2;
|
| 1776 |
stw(esp, T1); |
| 1777 |
} |
| 1778 |
} |
| 1779 |
#endif
|
| 1780 |
|
| 1781 |
void helper_lldt_T0(void) |
| 1782 |
{
|
| 1783 |
int selector;
|
| 1784 |
SegmentCache *dt; |
| 1785 |
uint32_t e1, e2; |
| 1786 |
int index, entry_limit;
|
| 1787 |
target_ulong ptr; |
| 1788 |
|
| 1789 |
selector = T0 & 0xffff;
|
| 1790 |
if ((selector & 0xfffc) == 0) { |
| 1791 |
/* XXX: NULL selector case: invalid LDT */
|
| 1792 |
env->ldt.base = 0;
|
| 1793 |
env->ldt.limit = 0;
|
| 1794 |
} else {
|
| 1795 |
if (selector & 0x4) |
| 1796 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 1797 |
dt = &env->gdt; |
| 1798 |
index = selector & ~7;
|
| 1799 |
#ifdef TARGET_X86_64
|
| 1800 |
if (env->hflags & HF_LMA_MASK)
|
| 1801 |
entry_limit = 15;
|
| 1802 |
else
|
| 1803 |
#endif
|
| 1804 |
entry_limit = 7;
|
| 1805 |
if ((index + entry_limit) > dt->limit)
|
| 1806 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 1807 |
ptr = dt->base + index; |
| 1808 |
e1 = ldl_kernel(ptr); |
| 1809 |
e2 = ldl_kernel(ptr + 4);
|
| 1810 |
if ((e2 & DESC_S_MASK) || ((e2 >> DESC_TYPE_SHIFT) & 0xf) != 2) |
| 1811 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 1812 |
if (!(e2 & DESC_P_MASK))
|
| 1813 |
raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc);
|
| 1814 |
#ifdef TARGET_X86_64
|
| 1815 |
if (env->hflags & HF_LMA_MASK) {
|
| 1816 |
uint32_t e3; |
| 1817 |
e3 = ldl_kernel(ptr + 8);
|
| 1818 |
load_seg_cache_raw_dt(&env->ldt, e1, e2); |
| 1819 |
env->ldt.base |= (target_ulong)e3 << 32;
|
| 1820 |
} else
|
| 1821 |
#endif
|
| 1822 |
{
|
| 1823 |
load_seg_cache_raw_dt(&env->ldt, e1, e2); |
| 1824 |
} |
| 1825 |
} |
| 1826 |
env->ldt.selector = selector; |
| 1827 |
} |
| 1828 |
|
| 1829 |
void helper_ltr_T0(void) |
| 1830 |
{
|
| 1831 |
int selector;
|
| 1832 |
SegmentCache *dt; |
| 1833 |
uint32_t e1, e2; |
| 1834 |
int index, type, entry_limit;
|
| 1835 |
target_ulong ptr; |
| 1836 |
|
| 1837 |
selector = T0 & 0xffff;
|
| 1838 |
if ((selector & 0xfffc) == 0) { |
| 1839 |
/* NULL selector case: invalid TR */
|
| 1840 |
env->tr.base = 0;
|
| 1841 |
env->tr.limit = 0;
|
| 1842 |
env->tr.flags = 0;
|
| 1843 |
} else {
|
| 1844 |
if (selector & 0x4) |
| 1845 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 1846 |
dt = &env->gdt; |
| 1847 |
index = selector & ~7;
|
| 1848 |
#ifdef TARGET_X86_64
|
| 1849 |
if (env->hflags & HF_LMA_MASK)
|
| 1850 |
entry_limit = 15;
|
| 1851 |
else
|
| 1852 |
#endif
|
| 1853 |
entry_limit = 7;
|
| 1854 |
if ((index + entry_limit) > dt->limit)
|
| 1855 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 1856 |
ptr = dt->base + index; |
| 1857 |
e1 = ldl_kernel(ptr); |
| 1858 |
e2 = ldl_kernel(ptr + 4);
|
| 1859 |
type = (e2 >> DESC_TYPE_SHIFT) & 0xf;
|
| 1860 |
if ((e2 & DESC_S_MASK) ||
|
| 1861 |
(type != 1 && type != 9)) |
| 1862 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 1863 |
if (!(e2 & DESC_P_MASK))
|
| 1864 |
raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc);
|
| 1865 |
#ifdef TARGET_X86_64
|
| 1866 |
if (env->hflags & HF_LMA_MASK) {
|
| 1867 |
uint32_t e3, e4; |
| 1868 |
e3 = ldl_kernel(ptr + 8);
|
| 1869 |
e4 = ldl_kernel(ptr + 12);
|
| 1870 |
if ((e4 >> DESC_TYPE_SHIFT) & 0xf) |
| 1871 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 1872 |
load_seg_cache_raw_dt(&env->tr, e1, e2); |
| 1873 |
env->tr.base |= (target_ulong)e3 << 32;
|
| 1874 |
} else
|
| 1875 |
#endif
|
| 1876 |
{
|
| 1877 |
load_seg_cache_raw_dt(&env->tr, e1, e2); |
| 1878 |
} |
| 1879 |
e2 |= DESC_TSS_BUSY_MASK; |
| 1880 |
stl_kernel(ptr + 4, e2);
|
| 1881 |
} |
| 1882 |
env->tr.selector = selector; |
| 1883 |
} |
| 1884 |
|
| 1885 |
/* only works if protected mode and not VM86. seg_reg must be != R_CS */
|
| 1886 |
void load_seg(int seg_reg, int selector) |
| 1887 |
{
|
| 1888 |
uint32_t e1, e2; |
| 1889 |
int cpl, dpl, rpl;
|
| 1890 |
SegmentCache *dt; |
| 1891 |
int index;
|
| 1892 |
target_ulong ptr; |
| 1893 |
|
| 1894 |
selector &= 0xffff;
|
| 1895 |
cpl = env->hflags & HF_CPL_MASK; |
| 1896 |
if ((selector & 0xfffc) == 0) { |
| 1897 |
/* null selector case */
|
| 1898 |
if (seg_reg == R_SS
|
| 1899 |
#ifdef TARGET_X86_64
|
| 1900 |
&& (!(env->hflags & HF_CS64_MASK) || cpl == 3)
|
| 1901 |
#endif
|
| 1902 |
) |
| 1903 |
raise_exception_err(EXCP0D_GPF, 0);
|
| 1904 |
cpu_x86_load_seg_cache(env, seg_reg, selector, 0, 0, 0); |
| 1905 |
} else {
|
| 1906 |
|
| 1907 |
if (selector & 0x4) |
| 1908 |
dt = &env->ldt; |
| 1909 |
else
|
| 1910 |
dt = &env->gdt; |
| 1911 |
index = selector & ~7;
|
| 1912 |
if ((index + 7) > dt->limit) |
| 1913 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 1914 |
ptr = dt->base + index; |
| 1915 |
e1 = ldl_kernel(ptr); |
| 1916 |
e2 = ldl_kernel(ptr + 4);
|
| 1917 |
|
| 1918 |
if (!(e2 & DESC_S_MASK))
|
| 1919 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 1920 |
rpl = selector & 3;
|
| 1921 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 1922 |
if (seg_reg == R_SS) {
|
| 1923 |
/* must be writable segment */
|
| 1924 |
if ((e2 & DESC_CS_MASK) || !(e2 & DESC_W_MASK))
|
| 1925 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 1926 |
if (rpl != cpl || dpl != cpl)
|
| 1927 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 1928 |
} else {
|
| 1929 |
/* must be readable segment */
|
| 1930 |
if ((e2 & (DESC_CS_MASK | DESC_R_MASK)) == DESC_CS_MASK)
|
| 1931 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 1932 |
|
| 1933 |
if (!(e2 & DESC_CS_MASK) || !(e2 & DESC_C_MASK)) {
|
| 1934 |
/* if not conforming code, test rights */
|
| 1935 |
if (dpl < cpl || dpl < rpl)
|
| 1936 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 1937 |
} |
| 1938 |
} |
| 1939 |
|
| 1940 |
if (!(e2 & DESC_P_MASK)) {
|
| 1941 |
if (seg_reg == R_SS)
|
| 1942 |
raise_exception_err(EXCP0C_STACK, selector & 0xfffc);
|
| 1943 |
else
|
| 1944 |
raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc);
|
| 1945 |
} |
| 1946 |
|
| 1947 |
/* set the access bit if not already set */
|
| 1948 |
if (!(e2 & DESC_A_MASK)) {
|
| 1949 |
e2 |= DESC_A_MASK; |
| 1950 |
stl_kernel(ptr + 4, e2);
|
| 1951 |
} |
| 1952 |
|
| 1953 |
cpu_x86_load_seg_cache(env, seg_reg, selector, |
| 1954 |
get_seg_base(e1, e2), |
| 1955 |
get_seg_limit(e1, e2), |
| 1956 |
e2); |
| 1957 |
#if 0
|
| 1958 |
fprintf(logfile, "load_seg: sel=0x%04x base=0x%08lx limit=0x%08lx flags=%08x\n",
|
| 1959 |
selector, (unsigned long)sc->base, sc->limit, sc->flags);
|
| 1960 |
#endif
|
| 1961 |
} |
| 1962 |
} |
| 1963 |
|
| 1964 |
/* protected mode jump */
|
| 1965 |
void helper_ljmp_protected_T0_T1(int next_eip_addend) |
| 1966 |
{
|
| 1967 |
int new_cs, gate_cs, type;
|
| 1968 |
uint32_t e1, e2, cpl, dpl, rpl, limit; |
| 1969 |
target_ulong new_eip, next_eip; |
| 1970 |
|
| 1971 |
new_cs = T0; |
| 1972 |
new_eip = T1; |
| 1973 |
if ((new_cs & 0xfffc) == 0) |
| 1974 |
raise_exception_err(EXCP0D_GPF, 0);
|
| 1975 |
if (load_segment(&e1, &e2, new_cs) != 0) |
| 1976 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1977 |
cpl = env->hflags & HF_CPL_MASK; |
| 1978 |
if (e2 & DESC_S_MASK) {
|
| 1979 |
if (!(e2 & DESC_CS_MASK))
|
| 1980 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1981 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 1982 |
if (e2 & DESC_C_MASK) {
|
| 1983 |
/* conforming code segment */
|
| 1984 |
if (dpl > cpl)
|
| 1985 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1986 |
} else {
|
| 1987 |
/* non conforming code segment */
|
| 1988 |
rpl = new_cs & 3;
|
| 1989 |
if (rpl > cpl)
|
| 1990 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1991 |
if (dpl != cpl)
|
| 1992 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1993 |
} |
| 1994 |
if (!(e2 & DESC_P_MASK))
|
| 1995 |
raise_exception_err(EXCP0B_NOSEG, new_cs & 0xfffc);
|
| 1996 |
limit = get_seg_limit(e1, e2); |
| 1997 |
if (new_eip > limit &&
|
| 1998 |
!(env->hflags & HF_LMA_MASK) && !(e2 & DESC_L_MASK)) |
| 1999 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 2000 |
cpu_x86_load_seg_cache(env, R_CS, (new_cs & 0xfffc) | cpl,
|
| 2001 |
get_seg_base(e1, e2), limit, e2); |
| 2002 |
EIP = new_eip; |
| 2003 |
} else {
|
| 2004 |
/* jump to call or task gate */
|
| 2005 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 2006 |
rpl = new_cs & 3;
|
| 2007 |
cpl = env->hflags & HF_CPL_MASK; |
| 2008 |
type = (e2 >> DESC_TYPE_SHIFT) & 0xf;
|
| 2009 |
switch(type) {
|
| 2010 |
case 1: /* 286 TSS */ |
| 2011 |
case 9: /* 386 TSS */ |
| 2012 |
case 5: /* task gate */ |
| 2013 |
if (dpl < cpl || dpl < rpl)
|
| 2014 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 2015 |
next_eip = env->eip + next_eip_addend; |
| 2016 |
switch_tss(new_cs, e1, e2, SWITCH_TSS_JMP, next_eip); |
| 2017 |
CC_OP = CC_OP_EFLAGS; |
| 2018 |
break;
|
| 2019 |
case 4: /* 286 call gate */ |
| 2020 |
case 12: /* 386 call gate */ |
| 2021 |
if ((dpl < cpl) || (dpl < rpl))
|
| 2022 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 2023 |
if (!(e2 & DESC_P_MASK))
|
| 2024 |
raise_exception_err(EXCP0B_NOSEG, new_cs & 0xfffc);
|
| 2025 |
gate_cs = e1 >> 16;
|
| 2026 |
new_eip = (e1 & 0xffff);
|
| 2027 |
if (type == 12) |
| 2028 |
new_eip |= (e2 & 0xffff0000);
|
| 2029 |
if (load_segment(&e1, &e2, gate_cs) != 0) |
| 2030 |
raise_exception_err(EXCP0D_GPF, gate_cs & 0xfffc);
|
| 2031 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 2032 |
/* must be code segment */
|
| 2033 |
if (((e2 & (DESC_S_MASK | DESC_CS_MASK)) !=
|
| 2034 |
(DESC_S_MASK | DESC_CS_MASK))) |
| 2035 |
raise_exception_err(EXCP0D_GPF, gate_cs & 0xfffc);
|
| 2036 |
if (((e2 & DESC_C_MASK) && (dpl > cpl)) ||
|
| 2037 |
(!(e2 & DESC_C_MASK) && (dpl != cpl))) |
| 2038 |
raise_exception_err(EXCP0D_GPF, gate_cs & 0xfffc);
|
| 2039 |
if (!(e2 & DESC_P_MASK))
|
| 2040 |
raise_exception_err(EXCP0D_GPF, gate_cs & 0xfffc);
|
| 2041 |
limit = get_seg_limit(e1, e2); |
| 2042 |
if (new_eip > limit)
|
| 2043 |
raise_exception_err(EXCP0D_GPF, 0);
|
| 2044 |
cpu_x86_load_seg_cache(env, R_CS, (gate_cs & 0xfffc) | cpl,
|
| 2045 |
get_seg_base(e1, e2), limit, e2); |
| 2046 |
EIP = new_eip; |
| 2047 |
break;
|
| 2048 |
default:
|
| 2049 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 2050 |
break;
|
| 2051 |
} |
| 2052 |
} |
| 2053 |
} |
| 2054 |
|
| 2055 |
/* real mode call */
|
| 2056 |
void helper_lcall_real_T0_T1(int shift, int next_eip) |
| 2057 |
{
|
| 2058 |
int new_cs, new_eip;
|
| 2059 |
uint32_t esp, esp_mask; |
| 2060 |
target_ulong ssp; |
| 2061 |
|
| 2062 |
new_cs = T0; |
| 2063 |
new_eip = T1; |
| 2064 |
esp = ESP; |
| 2065 |
esp_mask = get_sp_mask(env->segs[R_SS].flags); |
| 2066 |
ssp = env->segs[R_SS].base; |
| 2067 |
if (shift) {
|
| 2068 |
PUSHL(ssp, esp, esp_mask, env->segs[R_CS].selector); |
| 2069 |
PUSHL(ssp, esp, esp_mask, next_eip); |
| 2070 |
} else {
|
| 2071 |
PUSHW(ssp, esp, esp_mask, env->segs[R_CS].selector); |
| 2072 |
PUSHW(ssp, esp, esp_mask, next_eip); |
| 2073 |
} |
| 2074 |
|
| 2075 |
SET_ESP(esp, esp_mask); |
| 2076 |
env->eip = new_eip; |
| 2077 |
env->segs[R_CS].selector = new_cs; |
| 2078 |
env->segs[R_CS].base = (new_cs << 4);
|
| 2079 |
} |
| 2080 |
|
| 2081 |
/* protected mode call */
|
| 2082 |
void helper_lcall_protected_T0_T1(int shift, int next_eip_addend) |
| 2083 |
{
|
| 2084 |
int new_cs, new_stack, i;
|
| 2085 |
uint32_t e1, e2, cpl, dpl, rpl, selector, offset, param_count; |
| 2086 |
uint32_t ss, ss_e1, ss_e2, sp, type, ss_dpl, sp_mask; |
| 2087 |
uint32_t val, limit, old_sp_mask; |
| 2088 |
target_ulong ssp, old_ssp, next_eip, new_eip; |
| 2089 |
|
| 2090 |
new_cs = T0; |
| 2091 |
new_eip = T1; |
| 2092 |
next_eip = env->eip + next_eip_addend; |
| 2093 |
#ifdef DEBUG_PCALL
|
| 2094 |
if (loglevel & CPU_LOG_PCALL) {
|
| 2095 |
fprintf(logfile, "lcall %04x:%08x s=%d\n",
|
| 2096 |
new_cs, (uint32_t)new_eip, shift); |
| 2097 |
cpu_dump_state(env, logfile, fprintf, X86_DUMP_CCOP); |
| 2098 |
} |
| 2099 |
#endif
|
| 2100 |
if ((new_cs & 0xfffc) == 0) |
| 2101 |
raise_exception_err(EXCP0D_GPF, 0);
|
| 2102 |
if (load_segment(&e1, &e2, new_cs) != 0) |
| 2103 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 2104 |
cpl = env->hflags & HF_CPL_MASK; |
| 2105 |
#ifdef DEBUG_PCALL
|
| 2106 |
if (loglevel & CPU_LOG_PCALL) {
|
| 2107 |
fprintf(logfile, "desc=%08x:%08x\n", e1, e2);
|
| 2108 |
} |
| 2109 |
#endif
|
| 2110 |
if (e2 & DESC_S_MASK) {
|
| 2111 |
if (!(e2 & DESC_CS_MASK))
|
| 2112 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 2113 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 2114 |
if (e2 & DESC_C_MASK) {
|
| 2115 |
/* conforming code segment */
|
| 2116 |
if (dpl > cpl)
|
| 2117 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 2118 |
} else {
|
| 2119 |
/* non conforming code segment */
|
| 2120 |
rpl = new_cs & 3;
|
| 2121 |
if (rpl > cpl)
|
| 2122 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 2123 |
if (dpl != cpl)
|
| 2124 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 2125 |
} |
| 2126 |
if (!(e2 & DESC_P_MASK))
|
| 2127 |
raise_exception_err(EXCP0B_NOSEG, new_cs & 0xfffc);
|
| 2128 |
|
| 2129 |
#ifdef TARGET_X86_64
|
| 2130 |
/* XXX: check 16/32 bit cases in long mode */
|
| 2131 |
if (shift == 2) { |
| 2132 |
target_ulong rsp; |
| 2133 |
/* 64 bit case */
|
| 2134 |
rsp = ESP; |
| 2135 |
PUSHQ(rsp, env->segs[R_CS].selector); |
| 2136 |
PUSHQ(rsp, next_eip); |
| 2137 |
/* from this point, not restartable */
|
| 2138 |
ESP = rsp; |
| 2139 |
cpu_x86_load_seg_cache(env, R_CS, (new_cs & 0xfffc) | cpl,
|
| 2140 |
get_seg_base(e1, e2), |
| 2141 |
get_seg_limit(e1, e2), e2); |
| 2142 |
EIP = new_eip; |
| 2143 |
} else
|
| 2144 |
#endif
|
| 2145 |
{
|
| 2146 |
sp = ESP; |
| 2147 |
sp_mask = get_sp_mask(env->segs[R_SS].flags); |
| 2148 |
ssp = env->segs[R_SS].base; |
| 2149 |
if (shift) {
|
| 2150 |
PUSHL(ssp, sp, sp_mask, env->segs[R_CS].selector); |
| 2151 |
PUSHL(ssp, sp, sp_mask, next_eip); |
| 2152 |
} else {
|
| 2153 |
PUSHW(ssp, sp, sp_mask, env->segs[R_CS].selector); |
| 2154 |
PUSHW(ssp, sp, sp_mask, next_eip); |
| 2155 |
} |
| 2156 |
|
| 2157 |
limit = get_seg_limit(e1, e2); |
| 2158 |
if (new_eip > limit)
|
| 2159 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 2160 |
/* from this point, not restartable */
|
| 2161 |
SET_ESP(sp, sp_mask); |
| 2162 |
cpu_x86_load_seg_cache(env, R_CS, (new_cs & 0xfffc) | cpl,
|
| 2163 |
get_seg_base(e1, e2), limit, e2); |
| 2164 |
EIP = new_eip; |
| 2165 |
} |
| 2166 |
} else {
|
| 2167 |
/* check gate type */
|
| 2168 |
type = (e2 >> DESC_TYPE_SHIFT) & 0x1f;
|
| 2169 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 2170 |
rpl = new_cs & 3;
|
| 2171 |
switch(type) {
|
| 2172 |
case 1: /* available 286 TSS */ |
| 2173 |
case 9: /* available 386 TSS */ |
| 2174 |
case 5: /* task gate */ |
| 2175 |
if (dpl < cpl || dpl < rpl)
|
| 2176 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 2177 |
switch_tss(new_cs, e1, e2, SWITCH_TSS_CALL, next_eip); |
| 2178 |
CC_OP = CC_OP_EFLAGS; |
| 2179 |
return;
|
| 2180 |
case 4: /* 286 call gate */ |
| 2181 |
case 12: /* 386 call gate */ |
| 2182 |
break;
|
| 2183 |
default:
|
| 2184 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 2185 |
break;
|
| 2186 |
} |
| 2187 |
shift = type >> 3;
|
| 2188 |
|
| 2189 |
if (dpl < cpl || dpl < rpl)
|
| 2190 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 2191 |
/* check valid bit */
|
| 2192 |
if (!(e2 & DESC_P_MASK))
|
| 2193 |
raise_exception_err(EXCP0B_NOSEG, new_cs & 0xfffc);
|
| 2194 |
selector = e1 >> 16;
|
| 2195 |
offset = (e2 & 0xffff0000) | (e1 & 0x0000ffff); |
| 2196 |
param_count = e2 & 0x1f;
|
| 2197 |
if ((selector & 0xfffc) == 0) |
| 2198 |
raise_exception_err(EXCP0D_GPF, 0);
|
| 2199 |
|
| 2200 |
if (load_segment(&e1, &e2, selector) != 0) |
| 2201 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 2202 |
if (!(e2 & DESC_S_MASK) || !(e2 & (DESC_CS_MASK)))
|
| 2203 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 2204 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 2205 |
if (dpl > cpl)
|
| 2206 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 2207 |
if (!(e2 & DESC_P_MASK))
|
| 2208 |
raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc);
|
| 2209 |
|
| 2210 |
if (!(e2 & DESC_C_MASK) && dpl < cpl) {
|
| 2211 |
/* to inner priviledge */
|
| 2212 |
get_ss_esp_from_tss(&ss, &sp, dpl); |
| 2213 |
#ifdef DEBUG_PCALL
|
| 2214 |
if (loglevel & CPU_LOG_PCALL)
|
| 2215 |
fprintf(logfile, "new ss:esp=%04x:%08x param_count=%d ESP=" TARGET_FMT_lx "\n", |
| 2216 |
ss, sp, param_count, ESP); |
| 2217 |
#endif
|
| 2218 |
if ((ss & 0xfffc) == 0) |
| 2219 |
raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
| 2220 |
if ((ss & 3) != dpl) |
| 2221 |
raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
| 2222 |
if (load_segment(&ss_e1, &ss_e2, ss) != 0) |
| 2223 |
raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
| 2224 |
ss_dpl = (ss_e2 >> DESC_DPL_SHIFT) & 3;
|
| 2225 |
if (ss_dpl != dpl)
|
| 2226 |
raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
| 2227 |
if (!(ss_e2 & DESC_S_MASK) ||
|
| 2228 |
(ss_e2 & DESC_CS_MASK) || |
| 2229 |
!(ss_e2 & DESC_W_MASK)) |
| 2230 |
raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
| 2231 |
if (!(ss_e2 & DESC_P_MASK))
|
| 2232 |
raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
| 2233 |
|
| 2234 |
// push_size = ((param_count * 2) + 8) << shift;
|
| 2235 |
|
| 2236 |
old_sp_mask = get_sp_mask(env->segs[R_SS].flags); |
| 2237 |
old_ssp = env->segs[R_SS].base; |
| 2238 |
|
| 2239 |
sp_mask = get_sp_mask(ss_e2); |
| 2240 |
ssp = get_seg_base(ss_e1, ss_e2); |
| 2241 |
if (shift) {
|
| 2242 |
PUSHL(ssp, sp, sp_mask, env->segs[R_SS].selector); |
| 2243 |
PUSHL(ssp, sp, sp_mask, ESP); |
| 2244 |
for(i = param_count - 1; i >= 0; i--) { |
| 2245 |
val = ldl_kernel(old_ssp + ((ESP + i * 4) & old_sp_mask));
|
| 2246 |
PUSHL(ssp, sp, sp_mask, val); |
| 2247 |
} |
| 2248 |
} else {
|
| 2249 |
PUSHW(ssp, sp, sp_mask, env->segs[R_SS].selector); |
| 2250 |
PUSHW(ssp, sp, sp_mask, ESP); |
| 2251 |
for(i = param_count - 1; i >= 0; i--) { |
| 2252 |
val = lduw_kernel(old_ssp + ((ESP + i * 2) & old_sp_mask));
|
| 2253 |
PUSHW(ssp, sp, sp_mask, val); |
| 2254 |
} |
| 2255 |
} |
| 2256 |
new_stack = 1;
|
| 2257 |
} else {
|
| 2258 |
/* to same priviledge */
|
| 2259 |
sp = ESP; |
| 2260 |
sp_mask = get_sp_mask(env->segs[R_SS].flags); |
| 2261 |
ssp = env->segs[R_SS].base; |
| 2262 |
// push_size = (4 << shift);
|
| 2263 |
new_stack = 0;
|
| 2264 |
} |
| 2265 |
|
| 2266 |
if (shift) {
|
| 2267 |
PUSHL(ssp, sp, sp_mask, env->segs[R_CS].selector); |
| 2268 |
PUSHL(ssp, sp, sp_mask, next_eip); |
| 2269 |
} else {
|
| 2270 |
PUSHW(ssp, sp, sp_mask, env->segs[R_CS].selector); |
| 2271 |
PUSHW(ssp, sp, sp_mask, next_eip); |
| 2272 |
} |
| 2273 |
|
| 2274 |
/* from this point, not restartable */
|
| 2275 |
|
| 2276 |
if (new_stack) {
|
| 2277 |
ss = (ss & ~3) | dpl;
|
| 2278 |
cpu_x86_load_seg_cache(env, R_SS, ss, |
| 2279 |
ssp, |
| 2280 |
get_seg_limit(ss_e1, ss_e2), |
| 2281 |
ss_e2); |
| 2282 |
} |
| 2283 |
|
| 2284 |
selector = (selector & ~3) | dpl;
|
| 2285 |
cpu_x86_load_seg_cache(env, R_CS, selector, |
| 2286 |
get_seg_base(e1, e2), |
| 2287 |
get_seg_limit(e1, e2), |
| 2288 |
e2); |
| 2289 |
cpu_x86_set_cpl(env, dpl); |
| 2290 |
SET_ESP(sp, sp_mask); |
| 2291 |
EIP = offset; |
| 2292 |
} |
| 2293 |
#ifdef USE_KQEMU
|
| 2294 |
if (kqemu_is_ok(env)) {
|
| 2295 |
env->exception_index = -1;
|
| 2296 |
cpu_loop_exit(); |
| 2297 |
} |
| 2298 |
#endif
|
| 2299 |
} |
| 2300 |
|
| 2301 |
/* real and vm86 mode iret */
|
| 2302 |
void helper_iret_real(int shift) |
| 2303 |
{
|
| 2304 |
uint32_t sp, new_cs, new_eip, new_eflags, sp_mask; |
| 2305 |
target_ulong ssp; |
| 2306 |
int eflags_mask;
|
| 2307 |
|
| 2308 |
sp_mask = 0xffff; /* XXXX: use SS segment size ? */ |
| 2309 |
sp = ESP; |
| 2310 |
ssp = env->segs[R_SS].base; |
| 2311 |
if (shift == 1) { |
| 2312 |
/* 32 bits */
|
| 2313 |
POPL(ssp, sp, sp_mask, new_eip); |
| 2314 |
POPL(ssp, sp, sp_mask, new_cs); |
| 2315 |
new_cs &= 0xffff;
|
| 2316 |
POPL(ssp, sp, sp_mask, new_eflags); |
| 2317 |
} else {
|
| 2318 |
/* 16 bits */
|
| 2319 |
POPW(ssp, sp, sp_mask, new_eip); |
| 2320 |
POPW(ssp, sp, sp_mask, new_cs); |
| 2321 |
POPW(ssp, sp, sp_mask, new_eflags); |
| 2322 |
} |
| 2323 |
ESP = (ESP & ~sp_mask) | (sp & sp_mask); |
| 2324 |
load_seg_vm(R_CS, new_cs); |
| 2325 |
env->eip = new_eip; |
| 2326 |
if (env->eflags & VM_MASK)
|
| 2327 |
eflags_mask = TF_MASK | AC_MASK | ID_MASK | IF_MASK | RF_MASK | NT_MASK; |
| 2328 |
else
|
| 2329 |
eflags_mask = TF_MASK | AC_MASK | ID_MASK | IF_MASK | IOPL_MASK | RF_MASK | NT_MASK; |
| 2330 |
if (shift == 0) |
| 2331 |
eflags_mask &= 0xffff;
|
| 2332 |
load_eflags(new_eflags, eflags_mask); |
| 2333 |
} |
| 2334 |
|
| 2335 |
static inline void validate_seg(int seg_reg, int cpl) |
| 2336 |
{
|
| 2337 |
int dpl;
|
| 2338 |
uint32_t e2; |
| 2339 |
|
| 2340 |
/* XXX: on x86_64, we do not want to nullify FS and GS because
|
| 2341 |
they may still contain a valid base. I would be interested to
|
| 2342 |
know how a real x86_64 CPU behaves */
|
| 2343 |
if ((seg_reg == R_FS || seg_reg == R_GS) &&
|
| 2344 |
(env->segs[seg_reg].selector & 0xfffc) == 0) |
| 2345 |
return;
|
| 2346 |
|
| 2347 |
e2 = env->segs[seg_reg].flags; |
| 2348 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 2349 |
if (!(e2 & DESC_CS_MASK) || !(e2 & DESC_C_MASK)) {
|
| 2350 |
/* data or non conforming code segment */
|
| 2351 |
if (dpl < cpl) {
|
| 2352 |
cpu_x86_load_seg_cache(env, seg_reg, 0, 0, 0, 0); |
| 2353 |
} |
| 2354 |
} |
| 2355 |
} |
| 2356 |
|
| 2357 |
/* protected mode iret */
|
| 2358 |
static inline void helper_ret_protected(int shift, int is_iret, int addend) |
| 2359 |
{
|
| 2360 |
uint32_t new_cs, new_eflags, new_ss; |
| 2361 |
uint32_t new_es, new_ds, new_fs, new_gs; |
| 2362 |
uint32_t e1, e2, ss_e1, ss_e2; |
| 2363 |
int cpl, dpl, rpl, eflags_mask, iopl;
|
| 2364 |
target_ulong ssp, sp, new_eip, new_esp, sp_mask; |
| 2365 |
|
| 2366 |
#ifdef TARGET_X86_64
|
| 2367 |
if (shift == 2) |
| 2368 |
sp_mask = -1;
|
| 2369 |
else
|
| 2370 |
#endif
|
| 2371 |
sp_mask = get_sp_mask(env->segs[R_SS].flags); |
| 2372 |
sp = ESP; |
| 2373 |
ssp = env->segs[R_SS].base; |
| 2374 |
new_eflags = 0; /* avoid warning */ |
| 2375 |
#ifdef TARGET_X86_64
|
| 2376 |
if (shift == 2) { |
| 2377 |
POPQ(sp, new_eip); |
| 2378 |
POPQ(sp, new_cs); |
| 2379 |
new_cs &= 0xffff;
|
| 2380 |
if (is_iret) {
|
| 2381 |
POPQ(sp, new_eflags); |
| 2382 |
} |
| 2383 |
} else
|
| 2384 |
#endif
|
| 2385 |
if (shift == 1) { |
| 2386 |
/* 32 bits */
|
| 2387 |
POPL(ssp, sp, sp_mask, new_eip); |
| 2388 |
POPL(ssp, sp, sp_mask, new_cs); |
| 2389 |
new_cs &= 0xffff;
|
| 2390 |
if (is_iret) {
|
| 2391 |
POPL(ssp, sp, sp_mask, new_eflags); |
| 2392 |
if (new_eflags & VM_MASK)
|
| 2393 |
goto return_to_vm86;
|
| 2394 |
} |
| 2395 |
} else {
|
| 2396 |
/* 16 bits */
|
| 2397 |
POPW(ssp, sp, sp_mask, new_eip); |
| 2398 |
POPW(ssp, sp, sp_mask, new_cs); |
| 2399 |
if (is_iret)
|
| 2400 |
POPW(ssp, sp, sp_mask, new_eflags); |
| 2401 |
} |
| 2402 |
#ifdef DEBUG_PCALL
|
| 2403 |
if (loglevel & CPU_LOG_PCALL) {
|
| 2404 |
fprintf(logfile, "lret new %04x:" TARGET_FMT_lx " s=%d addend=0x%x\n", |
| 2405 |
new_cs, new_eip, shift, addend); |
| 2406 |
cpu_dump_state(env, logfile, fprintf, X86_DUMP_CCOP); |
| 2407 |
} |
| 2408 |
#endif
|
| 2409 |
if ((new_cs & 0xfffc) == 0) |
| 2410 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 2411 |
if (load_segment(&e1, &e2, new_cs) != 0) |
| 2412 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 2413 |
if (!(e2 & DESC_S_MASK) ||
|
| 2414 |
!(e2 & DESC_CS_MASK)) |
| 2415 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 2416 |
cpl = env->hflags & HF_CPL_MASK; |
| 2417 |
rpl = new_cs & 3;
|
| 2418 |
if (rpl < cpl)
|
| 2419 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 2420 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 2421 |
if (e2 & DESC_C_MASK) {
|
| 2422 |
if (dpl > rpl)
|
| 2423 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 2424 |
} else {
|
| 2425 |
if (dpl != rpl)
|
| 2426 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 2427 |
} |
| 2428 |
if (!(e2 & DESC_P_MASK))
|
| 2429 |
raise_exception_err(EXCP0B_NOSEG, new_cs & 0xfffc);
|
| 2430 |
|
| 2431 |
sp += addend; |
| 2432 |
if (rpl == cpl && (!(env->hflags & HF_CS64_MASK) ||
|
| 2433 |
((env->hflags & HF_CS64_MASK) && !is_iret))) {
|
| 2434 |
/* return to same priledge level */
|
| 2435 |
cpu_x86_load_seg_cache(env, R_CS, new_cs, |
| 2436 |
get_seg_base(e1, e2), |
| 2437 |
get_seg_limit(e1, e2), |
| 2438 |
e2); |
| 2439 |
} else {
|
| 2440 |
/* return to different priviledge level */
|
| 2441 |
#ifdef TARGET_X86_64
|
| 2442 |
if (shift == 2) { |
| 2443 |
POPQ(sp, new_esp); |
| 2444 |
POPQ(sp, new_ss); |
| 2445 |
new_ss &= 0xffff;
|
| 2446 |
} else
|
| 2447 |
#endif
|
| 2448 |
if (shift == 1) { |
| 2449 |
/* 32 bits */
|
| 2450 |
POPL(ssp, sp, sp_mask, new_esp); |
| 2451 |
POPL(ssp, sp, sp_mask, new_ss); |
| 2452 |
new_ss &= 0xffff;
|
| 2453 |
} else {
|
| 2454 |
/* 16 bits */
|
| 2455 |
POPW(ssp, sp, sp_mask, new_esp); |
| 2456 |
POPW(ssp, sp, sp_mask, new_ss); |
| 2457 |
} |
| 2458 |
#ifdef DEBUG_PCALL
|
| 2459 |
if (loglevel & CPU_LOG_PCALL) {
|
| 2460 |
fprintf(logfile, "new ss:esp=%04x:" TARGET_FMT_lx "\n", |
| 2461 |
new_ss, new_esp); |
| 2462 |
} |
| 2463 |
#endif
|
| 2464 |
if ((new_ss & 0xfffc) == 0) { |
| 2465 |
#ifdef TARGET_X86_64
|
| 2466 |
/* NULL ss is allowed in long mode if cpl != 3*/
|
| 2467 |
/* XXX: test CS64 ? */
|
| 2468 |
if ((env->hflags & HF_LMA_MASK) && rpl != 3) { |
| 2469 |
cpu_x86_load_seg_cache(env, R_SS, new_ss, |
| 2470 |
0, 0xffffffff, |
| 2471 |
DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | |
| 2472 |
DESC_S_MASK | (rpl << DESC_DPL_SHIFT) | |
| 2473 |
DESC_W_MASK | DESC_A_MASK); |
| 2474 |
ss_e2 = DESC_B_MASK; /* XXX: should not be needed ? */
|
| 2475 |
} else
|
| 2476 |
#endif
|
| 2477 |
{
|
| 2478 |
raise_exception_err(EXCP0D_GPF, 0);
|
| 2479 |
} |
| 2480 |
} else {
|
| 2481 |
if ((new_ss & 3) != rpl) |
| 2482 |
raise_exception_err(EXCP0D_GPF, new_ss & 0xfffc);
|
| 2483 |
if (load_segment(&ss_e1, &ss_e2, new_ss) != 0) |
| 2484 |
raise_exception_err(EXCP0D_GPF, new_ss & 0xfffc);
|
| 2485 |
if (!(ss_e2 & DESC_S_MASK) ||
|
| 2486 |
(ss_e2 & DESC_CS_MASK) || |
| 2487 |
!(ss_e2 & DESC_W_MASK)) |
| 2488 |
raise_exception_err(EXCP0D_GPF, new_ss & 0xfffc);
|
| 2489 |
dpl = (ss_e2 >> DESC_DPL_SHIFT) & 3;
|
| 2490 |
if (dpl != rpl)
|
| 2491 |
raise_exception_err(EXCP0D_GPF, new_ss & 0xfffc);
|
| 2492 |
if (!(ss_e2 & DESC_P_MASK))
|
| 2493 |
raise_exception_err(EXCP0B_NOSEG, new_ss & 0xfffc);
|
| 2494 |
cpu_x86_load_seg_cache(env, R_SS, new_ss, |
| 2495 |
get_seg_base(ss_e1, ss_e2), |
| 2496 |
get_seg_limit(ss_e1, ss_e2), |
| 2497 |
ss_e2); |
| 2498 |
} |
| 2499 |
|
| 2500 |
cpu_x86_load_seg_cache(env, R_CS, new_cs, |
| 2501 |
get_seg_base(e1, e2), |
| 2502 |
get_seg_limit(e1, e2), |
| 2503 |
e2); |
| 2504 |
cpu_x86_set_cpl(env, rpl); |
| 2505 |
sp = new_esp; |
| 2506 |
#ifdef TARGET_X86_64
|
| 2507 |
if (env->hflags & HF_CS64_MASK)
|
| 2508 |
sp_mask = -1;
|
| 2509 |
else
|
| 2510 |
#endif
|
| 2511 |
sp_mask = get_sp_mask(ss_e2); |
| 2512 |
|
| 2513 |
/* validate data segments */
|
| 2514 |
validate_seg(R_ES, rpl); |
| 2515 |
validate_seg(R_DS, rpl); |
| 2516 |
validate_seg(R_FS, rpl); |
| 2517 |
validate_seg(R_GS, rpl); |
| 2518 |
|
| 2519 |
sp += addend; |
| 2520 |
} |
| 2521 |
SET_ESP(sp, sp_mask); |
| 2522 |
env->eip = new_eip; |
| 2523 |
if (is_iret) {
|
| 2524 |
/* NOTE: 'cpl' is the _old_ CPL */
|
| 2525 |
eflags_mask = TF_MASK | AC_MASK | ID_MASK | RF_MASK | NT_MASK; |
| 2526 |
if (cpl == 0) |
| 2527 |
eflags_mask |= IOPL_MASK; |
| 2528 |
iopl = (env->eflags >> IOPL_SHIFT) & 3;
|
| 2529 |
if (cpl <= iopl)
|
| 2530 |
eflags_mask |= IF_MASK; |
| 2531 |
if (shift == 0) |
| 2532 |
eflags_mask &= 0xffff;
|
| 2533 |
load_eflags(new_eflags, eflags_mask); |
| 2534 |
} |
| 2535 |
return;
|
| 2536 |
|
| 2537 |
return_to_vm86:
|
| 2538 |
POPL(ssp, sp, sp_mask, new_esp); |
| 2539 |
POPL(ssp, sp, sp_mask, new_ss); |
| 2540 |
POPL(ssp, sp, sp_mask, new_es); |
| 2541 |
POPL(ssp, sp, sp_mask, new_ds); |
| 2542 |
POPL(ssp, sp, sp_mask, new_fs); |
| 2543 |
POPL(ssp, sp, sp_mask, new_gs); |
| 2544 |
|
| 2545 |
/* modify processor state */
|
| 2546 |
load_eflags(new_eflags, TF_MASK | AC_MASK | ID_MASK | |
| 2547 |
IF_MASK | IOPL_MASK | VM_MASK | NT_MASK | VIF_MASK | VIP_MASK); |
| 2548 |
load_seg_vm(R_CS, new_cs & 0xffff);
|
| 2549 |
cpu_x86_set_cpl(env, 3);
|
| 2550 |
load_seg_vm(R_SS, new_ss & 0xffff);
|
| 2551 |
load_seg_vm(R_ES, new_es & 0xffff);
|
| 2552 |
load_seg_vm(R_DS, new_ds & 0xffff);
|
| 2553 |
load_seg_vm(R_FS, new_fs & 0xffff);
|
| 2554 |
load_seg_vm(R_GS, new_gs & 0xffff);
|
| 2555 |
|
| 2556 |
env->eip = new_eip & 0xffff;
|
| 2557 |
ESP = new_esp; |
| 2558 |
} |
| 2559 |
|
| 2560 |
void helper_iret_protected(int shift, int next_eip) |
| 2561 |
{
|
| 2562 |
int tss_selector, type;
|
| 2563 |
uint32_t e1, e2; |
| 2564 |
|
| 2565 |
/* specific case for TSS */
|
| 2566 |
if (env->eflags & NT_MASK) {
|
| 2567 |
#ifdef TARGET_X86_64
|
| 2568 |
if (env->hflags & HF_LMA_MASK)
|
| 2569 |
raise_exception_err(EXCP0D_GPF, 0);
|
| 2570 |
#endif
|
| 2571 |
tss_selector = lduw_kernel(env->tr.base + 0);
|
| 2572 |
if (tss_selector & 4) |
| 2573 |
raise_exception_err(EXCP0A_TSS, tss_selector & 0xfffc);
|
| 2574 |
if (load_segment(&e1, &e2, tss_selector) != 0) |
| 2575 |
raise_exception_err(EXCP0A_TSS, tss_selector & 0xfffc);
|
| 2576 |
type = (e2 >> DESC_TYPE_SHIFT) & 0x17;
|
| 2577 |
/* NOTE: we check both segment and busy TSS */
|
| 2578 |
if (type != 3) |
| 2579 |
raise_exception_err(EXCP0A_TSS, tss_selector & 0xfffc);
|
| 2580 |
switch_tss(tss_selector, e1, e2, SWITCH_TSS_IRET, next_eip); |
| 2581 |
} else {
|
| 2582 |
helper_ret_protected(shift, 1, 0); |
| 2583 |
} |
| 2584 |
#ifdef USE_KQEMU
|
| 2585 |
if (kqemu_is_ok(env)) {
|
| 2586 |
CC_OP = CC_OP_EFLAGS; |
| 2587 |
env->exception_index = -1;
|
| 2588 |
cpu_loop_exit(); |
| 2589 |
} |
| 2590 |
#endif
|
| 2591 |
} |
| 2592 |
|
| 2593 |
void helper_lret_protected(int shift, int addend) |
| 2594 |
{
|
| 2595 |
helper_ret_protected(shift, 0, addend);
|
| 2596 |
#ifdef USE_KQEMU
|
| 2597 |
if (kqemu_is_ok(env)) {
|
| 2598 |
env->exception_index = -1;
|
| 2599 |
cpu_loop_exit(); |
| 2600 |
} |
| 2601 |
#endif
|
| 2602 |
} |
| 2603 |
|
| 2604 |
void helper_sysenter(void) |
| 2605 |
{
|
| 2606 |
if (env->sysenter_cs == 0) { |
| 2607 |
raise_exception_err(EXCP0D_GPF, 0);
|
| 2608 |
} |
| 2609 |
env->eflags &= ~(VM_MASK | IF_MASK | RF_MASK); |
| 2610 |
cpu_x86_set_cpl(env, 0);
|
| 2611 |
cpu_x86_load_seg_cache(env, R_CS, env->sysenter_cs & 0xfffc,
|
| 2612 |
0, 0xffffffff, |
| 2613 |
DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | |
| 2614 |
DESC_S_MASK | |
| 2615 |
DESC_CS_MASK | DESC_R_MASK | DESC_A_MASK); |
| 2616 |
cpu_x86_load_seg_cache(env, R_SS, (env->sysenter_cs + 8) & 0xfffc, |
| 2617 |
0, 0xffffffff, |
| 2618 |
DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | |
| 2619 |
DESC_S_MASK | |
| 2620 |
DESC_W_MASK | DESC_A_MASK); |
| 2621 |
ESP = env->sysenter_esp; |
| 2622 |
EIP = env->sysenter_eip; |
| 2623 |
} |
| 2624 |
|
| 2625 |
void helper_sysexit(void) |
| 2626 |
{
|
| 2627 |
int cpl;
|
| 2628 |
|
| 2629 |
cpl = env->hflags & HF_CPL_MASK; |
| 2630 |
if (env->sysenter_cs == 0 || cpl != 0) { |
| 2631 |
raise_exception_err(EXCP0D_GPF, 0);
|
| 2632 |
} |
| 2633 |
cpu_x86_set_cpl(env, 3);
|
| 2634 |
cpu_x86_load_seg_cache(env, R_CS, ((env->sysenter_cs + 16) & 0xfffc) | 3, |
| 2635 |
0, 0xffffffff, |
| 2636 |
DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | |
| 2637 |
DESC_S_MASK | (3 << DESC_DPL_SHIFT) |
|
| 2638 |
DESC_CS_MASK | DESC_R_MASK | DESC_A_MASK); |
| 2639 |
cpu_x86_load_seg_cache(env, R_SS, ((env->sysenter_cs + 24) & 0xfffc) | 3, |
| 2640 |
0, 0xffffffff, |
| 2641 |
DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | |
| 2642 |
DESC_S_MASK | (3 << DESC_DPL_SHIFT) |
|
| 2643 |
DESC_W_MASK | DESC_A_MASK); |
| 2644 |
ESP = ECX; |
| 2645 |
EIP = EDX; |
| 2646 |
#ifdef USE_KQEMU
|
| 2647 |
if (kqemu_is_ok(env)) {
|
| 2648 |
env->exception_index = -1;
|
| 2649 |
cpu_loop_exit(); |
| 2650 |
} |
| 2651 |
#endif
|
| 2652 |
} |
| 2653 |
|
| 2654 |
void helper_movl_crN_T0(int reg) |
| 2655 |
{
|
| 2656 |
#if !defined(CONFIG_USER_ONLY)
|
| 2657 |
switch(reg) {
|
| 2658 |
case 0: |
| 2659 |
cpu_x86_update_cr0(env, T0); |
| 2660 |
break;
|
| 2661 |
case 3: |
| 2662 |
cpu_x86_update_cr3(env, T0); |
| 2663 |
break;
|
| 2664 |
case 4: |
| 2665 |
cpu_x86_update_cr4(env, T0); |
| 2666 |
break;
|
| 2667 |
case 8: |
| 2668 |
cpu_set_apic_tpr(env, T0); |
| 2669 |
break;
|
| 2670 |
default:
|
| 2671 |
env->cr[reg] = T0; |
| 2672 |
break;
|
| 2673 |
} |
| 2674 |
#endif
|
| 2675 |
} |
| 2676 |
|
| 2677 |
/* XXX: do more */
|
| 2678 |
void helper_movl_drN_T0(int reg) |
| 2679 |
{
|
| 2680 |
env->dr[reg] = T0; |
| 2681 |
} |
| 2682 |
|
| 2683 |
void helper_invlpg(target_ulong addr)
|
| 2684 |
{
|
| 2685 |
cpu_x86_flush_tlb(env, addr); |
| 2686 |
} |
| 2687 |
|
| 2688 |
void helper_rdtsc(void) |
| 2689 |
{
|
| 2690 |
uint64_t val; |
| 2691 |
|
| 2692 |
if ((env->cr[4] & CR4_TSD_MASK) && ((env->hflags & HF_CPL_MASK) != 0)) { |
| 2693 |
raise_exception(EXCP0D_GPF); |
| 2694 |
} |
| 2695 |
val = cpu_get_tsc(env); |
| 2696 |
EAX = (uint32_t)(val); |
| 2697 |
EDX = (uint32_t)(val >> 32);
|
| 2698 |
} |
| 2699 |
|
| 2700 |
#if defined(CONFIG_USER_ONLY)
|
| 2701 |
void helper_wrmsr(void) |
| 2702 |
{
|
| 2703 |
} |
| 2704 |
|
| 2705 |
void helper_rdmsr(void) |
| 2706 |
{
|
| 2707 |
} |
| 2708 |
#else
|
| 2709 |
void helper_wrmsr(void) |
| 2710 |
{
|
| 2711 |
uint64_t val; |
| 2712 |
|
| 2713 |
val = ((uint32_t)EAX) | ((uint64_t)((uint32_t)EDX) << 32);
|
| 2714 |
|
| 2715 |
switch((uint32_t)ECX) {
|
| 2716 |
case MSR_IA32_SYSENTER_CS:
|
| 2717 |
env->sysenter_cs = val & 0xffff;
|
| 2718 |
break;
|
| 2719 |
case MSR_IA32_SYSENTER_ESP:
|
| 2720 |
env->sysenter_esp = val; |
| 2721 |
break;
|
| 2722 |
case MSR_IA32_SYSENTER_EIP:
|
| 2723 |
env->sysenter_eip = val; |
| 2724 |
break;
|
| 2725 |
case MSR_IA32_APICBASE:
|
| 2726 |
cpu_set_apic_base(env, val); |
| 2727 |
break;
|
| 2728 |
case MSR_EFER:
|
| 2729 |
{
|
| 2730 |
uint64_t update_mask; |
| 2731 |
update_mask = 0;
|
| 2732 |
if (env->cpuid_ext2_features & CPUID_EXT2_SYSCALL)
|
| 2733 |
update_mask |= MSR_EFER_SCE; |
| 2734 |
if (env->cpuid_ext2_features & CPUID_EXT2_LM)
|
| 2735 |
update_mask |= MSR_EFER_LME; |
| 2736 |
if (env->cpuid_ext2_features & CPUID_EXT2_FFXSR)
|
| 2737 |
update_mask |= MSR_EFER_FFXSR; |
| 2738 |
if (env->cpuid_ext2_features & CPUID_EXT2_NX)
|
| 2739 |
update_mask |= MSR_EFER_NXE; |
| 2740 |
env->efer = (env->efer & ~update_mask) | |
| 2741 |
(val & update_mask); |
| 2742 |
} |
| 2743 |
break;
|
| 2744 |
case MSR_STAR:
|
| 2745 |
env->star = val; |
| 2746 |
break;
|
| 2747 |
case MSR_PAT:
|
| 2748 |
env->pat = val; |
| 2749 |
break;
|
| 2750 |
#ifdef TARGET_X86_64
|
| 2751 |
case MSR_LSTAR:
|
| 2752 |
env->lstar = val; |
| 2753 |
break;
|
| 2754 |
case MSR_CSTAR:
|
| 2755 |
env->cstar = val; |
| 2756 |
break;
|
| 2757 |
case MSR_FMASK:
|
| 2758 |
env->fmask = val; |
| 2759 |
break;
|
| 2760 |
case MSR_FSBASE:
|
| 2761 |
env->segs[R_FS].base = val; |
| 2762 |
break;
|
| 2763 |
case MSR_GSBASE:
|
| 2764 |
env->segs[R_GS].base = val; |
| 2765 |
break;
|
| 2766 |
case MSR_KERNELGSBASE:
|
| 2767 |
env->kernelgsbase = val; |
| 2768 |
break;
|
| 2769 |
#endif
|
| 2770 |
default:
|
| 2771 |
/* XXX: exception ? */
|
| 2772 |
break;
|
| 2773 |
} |
| 2774 |
} |
| 2775 |
|
| 2776 |
void helper_rdmsr(void) |
| 2777 |
{
|
| 2778 |
uint64_t val; |
| 2779 |
switch((uint32_t)ECX) {
|
| 2780 |
case MSR_IA32_SYSENTER_CS:
|
| 2781 |
val = env->sysenter_cs; |
| 2782 |
break;
|
| 2783 |
case MSR_IA32_SYSENTER_ESP:
|
| 2784 |
val = env->sysenter_esp; |
| 2785 |
break;
|
| 2786 |
case MSR_IA32_SYSENTER_EIP:
|
| 2787 |
val = env->sysenter_eip; |
| 2788 |
break;
|
| 2789 |
case MSR_IA32_APICBASE:
|
| 2790 |
val = cpu_get_apic_base(env); |
| 2791 |
break;
|
| 2792 |
case MSR_EFER:
|
| 2793 |
val = env->efer; |
| 2794 |
break;
|
| 2795 |
case MSR_STAR:
|
| 2796 |
val = env->star; |
| 2797 |
break;
|
| 2798 |
case MSR_PAT:
|
| 2799 |
val = env->pat; |
| 2800 |
break;
|
| 2801 |
#ifdef TARGET_X86_64
|
| 2802 |
case MSR_LSTAR:
|
| 2803 |
val = env->lstar; |
| 2804 |
break;
|
| 2805 |
case MSR_CSTAR:
|
| 2806 |
val = env->cstar; |
| 2807 |
break;
|
| 2808 |
case MSR_FMASK:
|
| 2809 |
val = env->fmask; |
| 2810 |
break;
|
| 2811 |
case MSR_FSBASE:
|
| 2812 |
val = env->segs[R_FS].base; |
| 2813 |
break;
|
| 2814 |
case MSR_GSBASE:
|
| 2815 |
val = env->segs[R_GS].base; |
| 2816 |
break;
|
| 2817 |
case MSR_KERNELGSBASE:
|
| 2818 |
val = env->kernelgsbase; |
| 2819 |
break;
|
| 2820 |
#endif
|
| 2821 |
default:
|
| 2822 |
/* XXX: exception ? */
|
| 2823 |
val = 0;
|
| 2824 |
break;
|
| 2825 |
} |
| 2826 |
EAX = (uint32_t)(val); |
| 2827 |
EDX = (uint32_t)(val >> 32);
|
| 2828 |
} |
| 2829 |
#endif
|
| 2830 |
|
| 2831 |
void helper_lsl(void) |
| 2832 |
{
|
| 2833 |
unsigned int selector, limit; |
| 2834 |
uint32_t e1, e2, eflags; |
| 2835 |
int rpl, dpl, cpl, type;
|
| 2836 |
|
| 2837 |
eflags = cc_table[CC_OP].compute_all(); |
| 2838 |
selector = T0 & 0xffff;
|
| 2839 |
if (load_segment(&e1, &e2, selector) != 0) |
| 2840 |
goto fail;
|
| 2841 |
rpl = selector & 3;
|
| 2842 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 2843 |
cpl = env->hflags & HF_CPL_MASK; |
| 2844 |
if (e2 & DESC_S_MASK) {
|
| 2845 |
if ((e2 & DESC_CS_MASK) && (e2 & DESC_C_MASK)) {
|
| 2846 |
/* conforming */
|
| 2847 |
} else {
|
| 2848 |
if (dpl < cpl || dpl < rpl)
|
| 2849 |
goto fail;
|
| 2850 |
} |
| 2851 |
} else {
|
| 2852 |
type = (e2 >> DESC_TYPE_SHIFT) & 0xf;
|
| 2853 |
switch(type) {
|
| 2854 |
case 1: |
| 2855 |
case 2: |
| 2856 |
case 3: |
| 2857 |
case 9: |
| 2858 |
case 11: |
| 2859 |
break;
|
| 2860 |
default:
|
| 2861 |
goto fail;
|
| 2862 |
} |
| 2863 |
if (dpl < cpl || dpl < rpl) {
|
| 2864 |
fail:
|
| 2865 |
CC_SRC = eflags & ~CC_Z; |
| 2866 |
return;
|
| 2867 |
} |
| 2868 |
} |
| 2869 |
limit = get_seg_limit(e1, e2); |
| 2870 |
T1 = limit; |
| 2871 |
CC_SRC = eflags | CC_Z; |
| 2872 |
} |
| 2873 |
|
| 2874 |
void helper_lar(void) |
| 2875 |
{
|
| 2876 |
unsigned int selector; |
| 2877 |
uint32_t e1, e2, eflags; |
| 2878 |
int rpl, dpl, cpl, type;
|
| 2879 |
|
| 2880 |
eflags = cc_table[CC_OP].compute_all(); |
| 2881 |
selector = T0 & 0xffff;
|
| 2882 |
if ((selector & 0xfffc) == 0) |
| 2883 |
goto fail;
|
| 2884 |
if (load_segment(&e1, &e2, selector) != 0) |
| 2885 |
goto fail;
|
| 2886 |
rpl = selector & 3;
|
| 2887 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 2888 |
cpl = env->hflags & HF_CPL_MASK; |
| 2889 |
if (e2 & DESC_S_MASK) {
|
| 2890 |
if ((e2 & DESC_CS_MASK) && (e2 & DESC_C_MASK)) {
|
| 2891 |
/* conforming */
|
| 2892 |
} else {
|
| 2893 |
if (dpl < cpl || dpl < rpl)
|
| 2894 |
goto fail;
|
| 2895 |
} |
| 2896 |
} else {
|
| 2897 |
type = (e2 >> DESC_TYPE_SHIFT) & 0xf;
|
| 2898 |
switch(type) {
|
| 2899 |
case 1: |
| 2900 |
case 2: |
| 2901 |
case 3: |
| 2902 |
case 4: |
| 2903 |
case 5: |
| 2904 |
case 9: |
| 2905 |
case 11: |
| 2906 |
case 12: |
| 2907 |
break;
|
| 2908 |
default:
|
| 2909 |
goto fail;
|
| 2910 |
} |
| 2911 |
if (dpl < cpl || dpl < rpl) {
|
| 2912 |
fail:
|
| 2913 |
CC_SRC = eflags & ~CC_Z; |
| 2914 |
return;
|
| 2915 |
} |
| 2916 |
} |
| 2917 |
T1 = e2 & 0x00f0ff00;
|
| 2918 |
CC_SRC = eflags | CC_Z; |
| 2919 |
} |
| 2920 |
|
| 2921 |
void helper_verr(void) |
| 2922 |
{
|
| 2923 |
unsigned int selector; |
| 2924 |
uint32_t e1, e2, eflags; |
| 2925 |
int rpl, dpl, cpl;
|
| 2926 |
|
| 2927 |
eflags = cc_table[CC_OP].compute_all(); |
| 2928 |
selector = T0 & 0xffff;
|
| 2929 |
if ((selector & 0xfffc) == 0) |
| 2930 |
goto fail;
|
| 2931 |
if (load_segment(&e1, &e2, selector) != 0) |
| 2932 |
goto fail;
|
| 2933 |
if (!(e2 & DESC_S_MASK))
|
| 2934 |
goto fail;
|
| 2935 |
rpl = selector & 3;
|
| 2936 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 2937 |
cpl = env->hflags & HF_CPL_MASK; |
| 2938 |
if (e2 & DESC_CS_MASK) {
|
| 2939 |
if (!(e2 & DESC_R_MASK))
|
| 2940 |
goto fail;
|
| 2941 |
if (!(e2 & DESC_C_MASK)) {
|
| 2942 |
if (dpl < cpl || dpl < rpl)
|
| 2943 |
goto fail;
|
| 2944 |
} |
| 2945 |
} else {
|
| 2946 |
if (dpl < cpl || dpl < rpl) {
|
| 2947 |
fail:
|
| 2948 |
CC_SRC = eflags & ~CC_Z; |
| 2949 |
return;
|
| 2950 |
} |
| 2951 |
} |
| 2952 |
CC_SRC = eflags | CC_Z; |
| 2953 |
} |
| 2954 |
|
| 2955 |
void helper_verw(void) |
| 2956 |
{
|
| 2957 |
unsigned int selector; |
| 2958 |
uint32_t e1, e2, eflags; |
| 2959 |
int rpl, dpl, cpl;
|
| 2960 |
|
| 2961 |
eflags = cc_table[CC_OP].compute_all(); |
| 2962 |
selector = T0 & 0xffff;
|
| 2963 |
if ((selector & 0xfffc) == 0) |
| 2964 |
goto fail;
|
| 2965 |
if (load_segment(&e1, &e2, selector) != 0) |
| 2966 |
goto fail;
|
| 2967 |
if (!(e2 & DESC_S_MASK))
|
| 2968 |
goto fail;
|
| 2969 |
rpl = selector & 3;
|
| 2970 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 2971 |
cpl = env->hflags & HF_CPL_MASK; |
| 2972 |
if (e2 & DESC_CS_MASK) {
|
| 2973 |
goto fail;
|
| 2974 |
} else {
|
| 2975 |
if (dpl < cpl || dpl < rpl)
|
| 2976 |
goto fail;
|
| 2977 |
if (!(e2 & DESC_W_MASK)) {
|
| 2978 |
fail:
|
| 2979 |
CC_SRC = eflags & ~CC_Z; |
| 2980 |
return;
|
| 2981 |
} |
| 2982 |
} |
| 2983 |
CC_SRC = eflags | CC_Z; |
| 2984 |
} |
| 2985 |
|
| 2986 |
/* FPU helpers */
|
| 2987 |
|
| 2988 |
void helper_fldt_ST0_A0(void) |
| 2989 |
{
|
| 2990 |
int new_fpstt;
|
| 2991 |
new_fpstt = (env->fpstt - 1) & 7; |
| 2992 |
env->fpregs[new_fpstt].d = helper_fldt(A0); |
| 2993 |
env->fpstt = new_fpstt; |
| 2994 |
env->fptags[new_fpstt] = 0; /* validate stack entry */ |
| 2995 |
} |
| 2996 |
|
| 2997 |
void helper_fstt_ST0_A0(void) |
| 2998 |
{
|
| 2999 |
helper_fstt(ST0, A0); |
| 3000 |
} |
| 3001 |
|
| 3002 |
void fpu_set_exception(int mask) |
| 3003 |
{
|
| 3004 |
env->fpus |= mask; |
| 3005 |
if (env->fpus & (~env->fpuc & FPUC_EM))
|
| 3006 |
env->fpus |= FPUS_SE | FPUS_B; |
| 3007 |
} |
| 3008 |
|
| 3009 |
CPU86_LDouble helper_fdiv(CPU86_LDouble a, CPU86_LDouble b) |
| 3010 |
{
|
| 3011 |
if (b == 0.0) |
| 3012 |
fpu_set_exception(FPUS_ZE); |
| 3013 |
return a / b;
|
| 3014 |
} |
| 3015 |
|
| 3016 |
void fpu_raise_exception(void) |
| 3017 |
{
|
| 3018 |
if (env->cr[0] & CR0_NE_MASK) { |
| 3019 |
raise_exception(EXCP10_COPR); |
| 3020 |
} |
| 3021 |
#if !defined(CONFIG_USER_ONLY)
|
| 3022 |
else {
|
| 3023 |
cpu_set_ferr(env); |
| 3024 |
} |
| 3025 |
#endif
|
| 3026 |
} |
| 3027 |
|
| 3028 |
/* BCD ops */
|
| 3029 |
|
| 3030 |
void helper_fbld_ST0_A0(void) |
| 3031 |
{
|
| 3032 |
CPU86_LDouble tmp; |
| 3033 |
uint64_t val; |
| 3034 |
unsigned int v; |
| 3035 |
int i;
|
| 3036 |
|
| 3037 |
val = 0;
|
| 3038 |
for(i = 8; i >= 0; i--) { |
| 3039 |
v = ldub(A0 + i); |
| 3040 |
val = (val * 100) + ((v >> 4) * 10) + (v & 0xf); |
| 3041 |
} |
| 3042 |
tmp = val; |
| 3043 |
if (ldub(A0 + 9) & 0x80) |
| 3044 |
tmp = -tmp; |
| 3045 |
fpush(); |
| 3046 |
ST0 = tmp; |
| 3047 |
} |
| 3048 |
|
| 3049 |
void helper_fbst_ST0_A0(void) |
| 3050 |
{
|
| 3051 |
int v;
|
| 3052 |
target_ulong mem_ref, mem_end; |
| 3053 |
int64_t val; |
| 3054 |
|
| 3055 |
val = floatx_to_int64(ST0, &env->fp_status); |
| 3056 |
mem_ref = A0; |
| 3057 |
mem_end = mem_ref + 9;
|
| 3058 |
if (val < 0) { |
| 3059 |
stb(mem_end, 0x80);
|
| 3060 |
val = -val; |
| 3061 |
} else {
|
| 3062 |
stb(mem_end, 0x00);
|
| 3063 |
} |
| 3064 |
while (mem_ref < mem_end) {
|
| 3065 |
if (val == 0) |
| 3066 |
break;
|
| 3067 |
v = val % 100;
|
| 3068 |
val = val / 100;
|
| 3069 |
v = ((v / 10) << 4) | (v % 10); |
| 3070 |
stb(mem_ref++, v); |
| 3071 |
} |
| 3072 |
while (mem_ref < mem_end) {
|
| 3073 |
stb(mem_ref++, 0);
|
| 3074 |
} |
| 3075 |
} |
| 3076 |
|
| 3077 |
void helper_f2xm1(void) |
| 3078 |
{
|
| 3079 |
ST0 = pow(2.0,ST0) - 1.0; |
| 3080 |
} |
| 3081 |
|
| 3082 |
void helper_fyl2x(void) |
| 3083 |
{
|
| 3084 |
CPU86_LDouble fptemp; |
| 3085 |
|
| 3086 |
fptemp = ST0; |
| 3087 |
if (fptemp>0.0){ |
| 3088 |
fptemp = log(fptemp)/log(2.0); /* log2(ST) */ |
| 3089 |
ST1 *= fptemp; |
| 3090 |
fpop(); |
| 3091 |
} else {
|
| 3092 |
env->fpus &= (~0x4700);
|
| 3093 |
env->fpus |= 0x400;
|
| 3094 |
} |
| 3095 |
} |
| 3096 |
|
| 3097 |
void helper_fptan(void) |
| 3098 |
{
|
| 3099 |
CPU86_LDouble fptemp; |
| 3100 |
|
| 3101 |
fptemp = ST0; |
| 3102 |
if((fptemp > MAXTAN)||(fptemp < -MAXTAN)) {
|
| 3103 |
env->fpus |= 0x400;
|
| 3104 |
} else {
|
| 3105 |
ST0 = tan(fptemp); |
| 3106 |
fpush(); |
| 3107 |
ST0 = 1.0; |
| 3108 |
env->fpus &= (~0x400); /* C2 <-- 0 */ |
| 3109 |
/* the above code is for |arg| < 2**52 only */
|
| 3110 |
} |
| 3111 |
} |
| 3112 |
|
| 3113 |
void helper_fpatan(void) |
| 3114 |
{
|
| 3115 |
CPU86_LDouble fptemp, fpsrcop; |
| 3116 |
|
| 3117 |
fpsrcop = ST1; |
| 3118 |
fptemp = ST0; |
| 3119 |
ST1 = atan2(fpsrcop,fptemp); |
| 3120 |
fpop(); |
| 3121 |
} |
| 3122 |
|
| 3123 |
void helper_fxtract(void) |
| 3124 |
{
|
| 3125 |
CPU86_LDoubleU temp; |
| 3126 |
unsigned int expdif; |
| 3127 |
|
| 3128 |
temp.d = ST0; |
| 3129 |
expdif = EXPD(temp) - EXPBIAS; |
| 3130 |
/*DP exponent bias*/
|
| 3131 |
ST0 = expdif; |
| 3132 |
fpush(); |
| 3133 |
BIASEXPONENT(temp); |
| 3134 |
ST0 = temp.d; |
| 3135 |
} |
| 3136 |
|
| 3137 |
void helper_fprem1(void) |
| 3138 |
{
|
| 3139 |
CPU86_LDouble dblq, fpsrcop, fptemp; |
| 3140 |
CPU86_LDoubleU fpsrcop1, fptemp1; |
| 3141 |
int expdif;
|
| 3142 |
signed long long int q; |
| 3143 |
|
| 3144 |
if (isinf(ST0) || isnan(ST0) || isnan(ST1) || (ST1 == 0.0)) { |
| 3145 |
ST0 = 0.0 / 0.0; /* NaN */ |
| 3146 |
env->fpus &= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */ |
| 3147 |
return;
|
| 3148 |
} |
| 3149 |
|
| 3150 |
fpsrcop = ST0; |
| 3151 |
fptemp = ST1; |
| 3152 |
fpsrcop1.d = fpsrcop; |
| 3153 |
fptemp1.d = fptemp; |
| 3154 |
expdif = EXPD(fpsrcop1) - EXPD(fptemp1); |
| 3155 |
|
| 3156 |
if (expdif < 0) { |
| 3157 |
/* optimisation? taken from the AMD docs */
|
| 3158 |
env->fpus &= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */ |
| 3159 |
/* ST0 is unchanged */
|
| 3160 |
return;
|
| 3161 |
} |
| 3162 |
|
| 3163 |
if (expdif < 53) { |
| 3164 |
dblq = fpsrcop / fptemp; |
| 3165 |
/* round dblq towards nearest integer */
|
| 3166 |
dblq = rint(dblq); |
| 3167 |
ST0 = fpsrcop - fptemp * dblq; |
| 3168 |
|
| 3169 |
/* convert dblq to q by truncating towards zero */
|
| 3170 |
if (dblq < 0.0) |
| 3171 |
q = (signed long long int)(-dblq); |
| 3172 |
else
|
| 3173 |
q = (signed long long int)dblq; |
| 3174 |
|
| 3175 |
env->fpus &= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */ |
| 3176 |
/* (C0,C3,C1) <-- (q2,q1,q0) */
|
| 3177 |
env->fpus |= (q & 0x4) << (8 - 2); /* (C0) <-- q2 */ |
| 3178 |
env->fpus |= (q & 0x2) << (14 - 1); /* (C3) <-- q1 */ |
| 3179 |
env->fpus |= (q & 0x1) << (9 - 0); /* (C1) <-- q0 */ |
| 3180 |
} else {
|
| 3181 |
env->fpus |= 0x400; /* C2 <-- 1 */ |
| 3182 |
fptemp = pow(2.0, expdif - 50); |
| 3183 |
fpsrcop = (ST0 / ST1) / fptemp; |
| 3184 |
/* fpsrcop = integer obtained by chopping */
|
| 3185 |
fpsrcop = (fpsrcop < 0.0) ? |
| 3186 |
-(floor(fabs(fpsrcop))) : floor(fpsrcop); |
| 3187 |
ST0 -= (ST1 * fpsrcop * fptemp); |
| 3188 |
} |
| 3189 |
} |
| 3190 |
|
| 3191 |
void helper_fprem(void) |
| 3192 |
{
|
| 3193 |
CPU86_LDouble dblq, fpsrcop, fptemp; |
| 3194 |
CPU86_LDoubleU fpsrcop1, fptemp1; |
| 3195 |
int expdif;
|
| 3196 |
signed long long int q; |
| 3197 |
|
| 3198 |
if (isinf(ST0) || isnan(ST0) || isnan(ST1) || (ST1 == 0.0)) { |
| 3199 |
ST0 = 0.0 / 0.0; /* NaN */ |
| 3200 |
env->fpus &= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */ |
| 3201 |
return;
|
| 3202 |
} |
| 3203 |
|
| 3204 |
fpsrcop = (CPU86_LDouble)ST0; |
| 3205 |
fptemp = (CPU86_LDouble)ST1; |
| 3206 |
fpsrcop1.d = fpsrcop; |
| 3207 |
fptemp1.d = fptemp; |
| 3208 |
expdif = EXPD(fpsrcop1) - EXPD(fptemp1); |
| 3209 |
|
| 3210 |
if (expdif < 0) { |
| 3211 |
/* optimisation? taken from the AMD docs */
|
| 3212 |
env->fpus &= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */ |
| 3213 |
/* ST0 is unchanged */
|
| 3214 |
return;
|
| 3215 |
} |
| 3216 |
|
| 3217 |
if ( expdif < 53 ) { |
| 3218 |
dblq = fpsrcop/*ST0*/ / fptemp/*ST1*/; |
| 3219 |
/* round dblq towards zero */
|
| 3220 |
dblq = (dblq < 0.0) ? ceil(dblq) : floor(dblq); |
| 3221 |
ST0 = fpsrcop/*ST0*/ - fptemp * dblq;
|
| 3222 |
|
| 3223 |
/* convert dblq to q by truncating towards zero */
|
| 3224 |
if (dblq < 0.0) |
| 3225 |
q = (signed long long int)(-dblq); |
| 3226 |
else
|
| 3227 |
q = (signed long long int)dblq; |
| 3228 |
|
| 3229 |
env->fpus &= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */ |
| 3230 |
/* (C0,C3,C1) <-- (q2,q1,q0) */
|
| 3231 |
env->fpus |= (q & 0x4) << (8 - 2); /* (C0) <-- q2 */ |
| 3232 |
env->fpus |= (q & 0x2) << (14 - 1); /* (C3) <-- q1 */ |
| 3233 |
env->fpus |= (q & 0x1) << (9 - 0); /* (C1) <-- q0 */ |
| 3234 |
} else {
|
| 3235 |
int N = 32 + (expdif % 32); /* as per AMD docs */ |
| 3236 |
env->fpus |= 0x400; /* C2 <-- 1 */ |
| 3237 |
fptemp = pow(2.0, (double)(expdif - N)); |
| 3238 |
fpsrcop = (ST0 / ST1) / fptemp; |
| 3239 |
/* fpsrcop = integer obtained by chopping */
|
| 3240 |
fpsrcop = (fpsrcop < 0.0) ? |
| 3241 |
-(floor(fabs(fpsrcop))) : floor(fpsrcop); |
| 3242 |
ST0 -= (ST1 * fpsrcop * fptemp); |
| 3243 |
} |
| 3244 |
} |
| 3245 |
|
| 3246 |
void helper_fyl2xp1(void) |
| 3247 |
{
|
| 3248 |
CPU86_LDouble fptemp; |
| 3249 |
|
| 3250 |
fptemp = ST0; |
| 3251 |
if ((fptemp+1.0)>0.0) { |
| 3252 |
fptemp = log(fptemp+1.0) / log(2.0); /* log2(ST+1.0) */ |
| 3253 |
ST1 *= fptemp; |
| 3254 |
fpop(); |
| 3255 |
} else {
|
| 3256 |
env->fpus &= (~0x4700);
|
| 3257 |
env->fpus |= 0x400;
|
| 3258 |
} |
| 3259 |
} |
| 3260 |
|
| 3261 |
void helper_fsqrt(void) |
| 3262 |
{
|
| 3263 |
CPU86_LDouble fptemp; |
| 3264 |
|
| 3265 |
fptemp = ST0; |
| 3266 |
if (fptemp<0.0) { |
| 3267 |
env->fpus &= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */ |
| 3268 |
env->fpus |= 0x400;
|
| 3269 |
} |
| 3270 |
ST0 = sqrt(fptemp); |
| 3271 |
} |
| 3272 |
|
| 3273 |
void helper_fsincos(void) |
| 3274 |
{
|
| 3275 |
CPU86_LDouble fptemp; |
| 3276 |
|
| 3277 |
fptemp = ST0; |
| 3278 |
if ((fptemp > MAXTAN)||(fptemp < -MAXTAN)) {
|
| 3279 |
env->fpus |= 0x400;
|
| 3280 |
} else {
|
| 3281 |
ST0 = sin(fptemp); |
| 3282 |
fpush(); |
| 3283 |
ST0 = cos(fptemp); |
| 3284 |
env->fpus &= (~0x400); /* C2 <-- 0 */ |
| 3285 |
/* the above code is for |arg| < 2**63 only */
|
| 3286 |
} |
| 3287 |
} |
| 3288 |
|
| 3289 |
void helper_frndint(void) |
| 3290 |
{
|
| 3291 |
ST0 = floatx_round_to_int(ST0, &env->fp_status); |
| 3292 |
} |
| 3293 |
|
| 3294 |
void helper_fscale(void) |
| 3295 |
{
|
| 3296 |
ST0 = ldexp (ST0, (int)(ST1));
|
| 3297 |
} |
| 3298 |
|
| 3299 |
void helper_fsin(void) |
| 3300 |
{
|
| 3301 |
CPU86_LDouble fptemp; |
| 3302 |
|
| 3303 |
fptemp = ST0; |
| 3304 |
if ((fptemp > MAXTAN)||(fptemp < -MAXTAN)) {
|
| 3305 |
env->fpus |= 0x400;
|
| 3306 |
} else {
|
| 3307 |
ST0 = sin(fptemp); |
| 3308 |
env->fpus &= (~0x400); /* C2 <-- 0 */ |
| 3309 |
/* the above code is for |arg| < 2**53 only */
|
| 3310 |
} |
| 3311 |
} |
| 3312 |
|
| 3313 |
void helper_fcos(void) |
| 3314 |
{
|
| 3315 |
CPU86_LDouble fptemp; |
| 3316 |
|
| 3317 |
fptemp = ST0; |
| 3318 |
if((fptemp > MAXTAN)||(fptemp < -MAXTAN)) {
|
| 3319 |
env->fpus |= 0x400;
|
| 3320 |
} else {
|
| 3321 |
ST0 = cos(fptemp); |
| 3322 |
env->fpus &= (~0x400); /* C2 <-- 0 */ |
| 3323 |
/* the above code is for |arg5 < 2**63 only */
|
| 3324 |
} |
| 3325 |
} |
| 3326 |
|
| 3327 |
void helper_fxam_ST0(void) |
| 3328 |
{
|
| 3329 |
CPU86_LDoubleU temp; |
| 3330 |
int expdif;
|
| 3331 |
|
| 3332 |
temp.d = ST0; |
| 3333 |
|
| 3334 |
env->fpus &= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */ |
| 3335 |
if (SIGND(temp))
|
| 3336 |
env->fpus |= 0x200; /* C1 <-- 1 */ |
| 3337 |
|
| 3338 |
/* XXX: test fptags too */
|
| 3339 |
expdif = EXPD(temp); |
| 3340 |
if (expdif == MAXEXPD) {
|
| 3341 |
#ifdef USE_X86LDOUBLE
|
| 3342 |
if (MANTD(temp) == 0x8000000000000000ULL) |
| 3343 |
#else
|
| 3344 |
if (MANTD(temp) == 0) |
| 3345 |
#endif
|
| 3346 |
env->fpus |= 0x500 /*Infinity*/; |
| 3347 |
else
|
| 3348 |
env->fpus |= 0x100 /*NaN*/; |
| 3349 |
} else if (expdif == 0) { |
| 3350 |
if (MANTD(temp) == 0) |
| 3351 |
env->fpus |= 0x4000 /*Zero*/; |
| 3352 |
else
|
| 3353 |
env->fpus |= 0x4400 /*Denormal*/; |
| 3354 |
} else {
|
| 3355 |
env->fpus |= 0x400;
|
| 3356 |
} |
| 3357 |
} |
| 3358 |
|
| 3359 |
void helper_fstenv(target_ulong ptr, int data32) |
| 3360 |
{
|
| 3361 |
int fpus, fptag, exp, i;
|
| 3362 |
uint64_t mant; |
| 3363 |
CPU86_LDoubleU tmp; |
| 3364 |
|
| 3365 |
fpus = (env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11; |
| 3366 |
fptag = 0;
|
| 3367 |
for (i=7; i>=0; i--) { |
| 3368 |
fptag <<= 2;
|
| 3369 |
if (env->fptags[i]) {
|
| 3370 |
fptag |= 3;
|
| 3371 |
} else {
|
| 3372 |
tmp.d = env->fpregs[i].d; |
| 3373 |
exp = EXPD(tmp); |
| 3374 |
mant = MANTD(tmp); |
| 3375 |
if (exp == 0 && mant == 0) { |
| 3376 |
/* zero */
|
| 3377 |
fptag |= 1;
|
| 3378 |
} else if (exp == 0 || exp == MAXEXPD |
| 3379 |
#ifdef USE_X86LDOUBLE
|
| 3380 |
|| (mant & (1LL << 63)) == 0 |
| 3381 |
#endif
|
| 3382 |
) {
|
| 3383 |
/* NaNs, infinity, denormal */
|
| 3384 |
fptag |= 2;
|
| 3385 |
} |
| 3386 |
} |
| 3387 |
} |
| 3388 |
if (data32) {
|
| 3389 |
/* 32 bit */
|
| 3390 |
stl(ptr, env->fpuc); |
| 3391 |
stl(ptr + 4, fpus);
|
| 3392 |
stl(ptr + 8, fptag);
|
| 3393 |
stl(ptr + 12, 0); /* fpip */ |
| 3394 |
stl(ptr + 16, 0); /* fpcs */ |
| 3395 |
stl(ptr + 20, 0); /* fpoo */ |
| 3396 |
stl(ptr + 24, 0); /* fpos */ |
| 3397 |
} else {
|
| 3398 |
/* 16 bit */
|
| 3399 |
stw(ptr, env->fpuc); |
| 3400 |
stw(ptr + 2, fpus);
|
| 3401 |
stw(ptr + 4, fptag);
|
| 3402 |
stw(ptr + 6, 0); |
| 3403 |
stw(ptr + 8, 0); |
| 3404 |
stw(ptr + 10, 0); |
| 3405 |
stw(ptr + 12, 0); |
| 3406 |
} |
| 3407 |
} |
| 3408 |
|
| 3409 |
void helper_fldenv(target_ulong ptr, int data32) |
| 3410 |
{
|
| 3411 |
int i, fpus, fptag;
|
| 3412 |
|
| 3413 |
if (data32) {
|
| 3414 |
env->fpuc = lduw(ptr); |
| 3415 |
fpus = lduw(ptr + 4);
|
| 3416 |
fptag = lduw(ptr + 8);
|
| 3417 |
} |
| 3418 |
else {
|
| 3419 |
env->fpuc = lduw(ptr); |
| 3420 |
fpus = lduw(ptr + 2);
|
| 3421 |
fptag = lduw(ptr + 4);
|
| 3422 |
} |
| 3423 |
env->fpstt = (fpus >> 11) & 7; |
| 3424 |
env->fpus = fpus & ~0x3800;
|
| 3425 |
for(i = 0;i < 8; i++) { |
| 3426 |
env->fptags[i] = ((fptag & 3) == 3); |
| 3427 |
fptag >>= 2;
|
| 3428 |
} |
| 3429 |
} |
| 3430 |
|
| 3431 |
void helper_fsave(target_ulong ptr, int data32) |
| 3432 |
{
|
| 3433 |
CPU86_LDouble tmp; |
| 3434 |
int i;
|
| 3435 |
|
| 3436 |
helper_fstenv(ptr, data32); |
| 3437 |
|
| 3438 |
ptr += (14 << data32);
|
| 3439 |
for(i = 0;i < 8; i++) { |
| 3440 |
tmp = ST(i); |
| 3441 |
helper_fstt(tmp, ptr); |
| 3442 |
ptr += 10;
|
| 3443 |
} |
| 3444 |
|
| 3445 |
/* fninit */
|
| 3446 |
env->fpus = 0;
|
| 3447 |
env->fpstt = 0;
|
| 3448 |
env->fpuc = 0x37f;
|
| 3449 |
env->fptags[0] = 1; |
| 3450 |
env->fptags[1] = 1; |
| 3451 |
env->fptags[2] = 1; |
| 3452 |
env->fptags[3] = 1; |
| 3453 |
env->fptags[4] = 1; |
| 3454 |
env->fptags[5] = 1; |
| 3455 |
env->fptags[6] = 1; |
| 3456 |
env->fptags[7] = 1; |
| 3457 |
} |
| 3458 |
|
| 3459 |
void helper_frstor(target_ulong ptr, int data32) |
| 3460 |
{
|
| 3461 |
CPU86_LDouble tmp; |
| 3462 |
int i;
|
| 3463 |
|
| 3464 |
helper_fldenv(ptr, data32); |
| 3465 |
ptr += (14 << data32);
|
| 3466 |
|
| 3467 |
for(i = 0;i < 8; i++) { |
| 3468 |
tmp = helper_fldt(ptr); |
| 3469 |
ST(i) = tmp; |
| 3470 |
ptr += 10;
|
| 3471 |
} |
| 3472 |
} |
| 3473 |
|
| 3474 |
void helper_fxsave(target_ulong ptr, int data64) |
| 3475 |
{
|
| 3476 |
int fpus, fptag, i, nb_xmm_regs;
|
| 3477 |
CPU86_LDouble tmp; |
| 3478 |
target_ulong addr; |
| 3479 |
|
| 3480 |
fpus = (env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11; |
| 3481 |
fptag = 0;
|
| 3482 |
for(i = 0; i < 8; i++) { |
| 3483 |
fptag |= (env->fptags[i] << i); |
| 3484 |
} |
| 3485 |
stw(ptr, env->fpuc); |
| 3486 |
stw(ptr + 2, fpus);
|
| 3487 |
stw(ptr + 4, fptag ^ 0xff); |
| 3488 |
|
| 3489 |
addr = ptr + 0x20;
|
| 3490 |
for(i = 0;i < 8; i++) { |
| 3491 |
tmp = ST(i); |
| 3492 |
helper_fstt(tmp, addr); |
| 3493 |
addr += 16;
|
| 3494 |
} |
| 3495 |
|
| 3496 |
if (env->cr[4] & CR4_OSFXSR_MASK) { |
| 3497 |
/* XXX: finish it */
|
| 3498 |
stl(ptr + 0x18, env->mxcsr); /* mxcsr */ |
| 3499 |
stl(ptr + 0x1c, 0x0000ffff); /* mxcsr_mask */ |
| 3500 |
nb_xmm_regs = 8 << data64;
|
| 3501 |
addr = ptr + 0xa0;
|
| 3502 |
for(i = 0; i < nb_xmm_regs; i++) { |
| 3503 |
stq(addr, env->xmm_regs[i].XMM_Q(0));
|
| 3504 |
stq(addr + 8, env->xmm_regs[i].XMM_Q(1)); |
| 3505 |
addr += 16;
|
| 3506 |
} |
| 3507 |
} |
| 3508 |
} |
| 3509 |
|
| 3510 |
void helper_fxrstor(target_ulong ptr, int data64) |
| 3511 |
{
|
| 3512 |
int i, fpus, fptag, nb_xmm_regs;
|
| 3513 |
CPU86_LDouble tmp; |
| 3514 |
target_ulong addr; |
| 3515 |
|
| 3516 |
env->fpuc = lduw(ptr); |
| 3517 |
fpus = lduw(ptr + 2);
|
| 3518 |
fptag = lduw(ptr + 4);
|
| 3519 |
env->fpstt = (fpus >> 11) & 7; |
| 3520 |
env->fpus = fpus & ~0x3800;
|
| 3521 |
fptag ^= 0xff;
|
| 3522 |
for(i = 0;i < 8; i++) { |
| 3523 |
env->fptags[i] = ((fptag >> i) & 1);
|
| 3524 |
} |
| 3525 |
|
| 3526 |
addr = ptr + 0x20;
|
| 3527 |
for(i = 0;i < 8; i++) { |
| 3528 |
tmp = helper_fldt(addr); |
| 3529 |
ST(i) = tmp; |
| 3530 |
addr += 16;
|
| 3531 |
} |
| 3532 |
|
| 3533 |
if (env->cr[4] & CR4_OSFXSR_MASK) { |
| 3534 |
/* XXX: finish it */
|
| 3535 |
env->mxcsr = ldl(ptr + 0x18);
|
| 3536 |
//ldl(ptr + 0x1c);
|
| 3537 |
nb_xmm_regs = 8 << data64;
|
| 3538 |
addr = ptr + 0xa0;
|
| 3539 |
for(i = 0; i < nb_xmm_regs; i++) { |
| 3540 |
env->xmm_regs[i].XMM_Q(0) = ldq(addr);
|
| 3541 |
env->xmm_regs[i].XMM_Q(1) = ldq(addr + 8); |
| 3542 |
addr += 16;
|
| 3543 |
} |
| 3544 |
} |
| 3545 |
} |
| 3546 |
|
| 3547 |
#ifndef USE_X86LDOUBLE
|
| 3548 |
|
| 3549 |
void cpu_get_fp80(uint64_t *pmant, uint16_t *pexp, CPU86_LDouble f)
|
| 3550 |
{
|
| 3551 |
CPU86_LDoubleU temp; |
| 3552 |
int e;
|
| 3553 |
|
| 3554 |
temp.d = f; |
| 3555 |
/* mantissa */
|
| 3556 |
*pmant = (MANTD(temp) << 11) | (1LL << 63); |
| 3557 |
/* exponent + sign */
|
| 3558 |
e = EXPD(temp) - EXPBIAS + 16383;
|
| 3559 |
e |= SIGND(temp) >> 16;
|
| 3560 |
*pexp = e; |
| 3561 |
} |
| 3562 |
|
| 3563 |
CPU86_LDouble cpu_set_fp80(uint64_t mant, uint16_t upper) |
| 3564 |
{
|
| 3565 |
CPU86_LDoubleU temp; |
| 3566 |
int e;
|
| 3567 |
uint64_t ll; |
| 3568 |
|
| 3569 |
/* XXX: handle overflow ? */
|
| 3570 |
e = (upper & 0x7fff) - 16383 + EXPBIAS; /* exponent */ |
| 3571 |
e |= (upper >> 4) & 0x800; /* sign */ |
| 3572 |
ll = (mant >> 11) & ((1LL << 52) - 1); |
| 3573 |
#ifdef __arm__
|
| 3574 |
temp.l.upper = (e << 20) | (ll >> 32); |
| 3575 |
temp.l.lower = ll; |
| 3576 |
#else
|
| 3577 |
temp.ll = ll | ((uint64_t)e << 52);
|
| 3578 |
#endif
|
| 3579 |
return temp.d;
|
| 3580 |
} |
| 3581 |
|
| 3582 |
#else
|
| 3583 |
|
| 3584 |
void cpu_get_fp80(uint64_t *pmant, uint16_t *pexp, CPU86_LDouble f)
|
| 3585 |
{
|
| 3586 |
CPU86_LDoubleU temp; |
| 3587 |
|
| 3588 |
temp.d = f; |
| 3589 |
*pmant = temp.l.lower; |
| 3590 |
*pexp = temp.l.upper; |
| 3591 |
} |
| 3592 |
|
| 3593 |
CPU86_LDouble cpu_set_fp80(uint64_t mant, uint16_t upper) |
| 3594 |
{
|
| 3595 |
CPU86_LDoubleU temp; |
| 3596 |
|
| 3597 |
temp.l.upper = upper; |
| 3598 |
temp.l.lower = mant; |
| 3599 |
return temp.d;
|
| 3600 |
} |
| 3601 |
#endif
|
| 3602 |
|
| 3603 |
#ifdef TARGET_X86_64
|
| 3604 |
|
| 3605 |
//#define DEBUG_MULDIV
|
| 3606 |
|
| 3607 |
static void add128(uint64_t *plow, uint64_t *phigh, uint64_t a, uint64_t b) |
| 3608 |
{
|
| 3609 |
*plow += a; |
| 3610 |
/* carry test */
|
| 3611 |
if (*plow < a)
|
| 3612 |
(*phigh)++; |
| 3613 |
*phigh += b; |
| 3614 |
} |
| 3615 |
|
| 3616 |
static void neg128(uint64_t *plow, uint64_t *phigh) |
| 3617 |
{
|
| 3618 |
*plow = ~ *plow; |
| 3619 |
*phigh = ~ *phigh; |
| 3620 |
add128(plow, phigh, 1, 0); |
| 3621 |
} |
| 3622 |
|
| 3623 |
/* return TRUE if overflow */
|
| 3624 |
static int div64(uint64_t *plow, uint64_t *phigh, uint64_t b) |
| 3625 |
{
|
| 3626 |
uint64_t q, r, a1, a0; |
| 3627 |
int i, qb, ab;
|
| 3628 |
|
| 3629 |
a0 = *plow; |
| 3630 |
a1 = *phigh; |
| 3631 |
if (a1 == 0) { |
| 3632 |
q = a0 / b; |
| 3633 |
r = a0 % b; |
| 3634 |
*plow = q; |
| 3635 |
*phigh = r; |
| 3636 |
} else {
|
| 3637 |
if (a1 >= b)
|
| 3638 |
return 1; |
| 3639 |
/* XXX: use a better algorithm */
|
| 3640 |
for(i = 0; i < 64; i++) { |
| 3641 |
ab = a1 >> 63;
|
| 3642 |
a1 = (a1 << 1) | (a0 >> 63); |
| 3643 |
if (ab || a1 >= b) {
|
| 3644 |
a1 -= b; |
| 3645 |
qb = 1;
|
| 3646 |
} else {
|
| 3647 |
qb = 0;
|
| 3648 |
} |
| 3649 |
a0 = (a0 << 1) | qb;
|
| 3650 |
} |
| 3651 |
#if defined(DEBUG_MULDIV)
|
| 3652 |
printf("div: 0x%016" PRIx64 "%016" PRIx64 " / 0x%016" PRIx64 ": q=0x%016" PRIx64 " r=0x%016" PRIx64 "\n", |
| 3653 |
*phigh, *plow, b, a0, a1); |
| 3654 |
#endif
|
| 3655 |
*plow = a0; |
| 3656 |
*phigh = a1; |
| 3657 |
} |
| 3658 |
return 0; |
| 3659 |
} |
| 3660 |
|
| 3661 |
/* return TRUE if overflow */
|
| 3662 |
static int idiv64(uint64_t *plow, uint64_t *phigh, int64_t b) |
| 3663 |
{
|
| 3664 |
int sa, sb;
|
| 3665 |
sa = ((int64_t)*phigh < 0);
|
| 3666 |
if (sa)
|
| 3667 |
neg128(plow, phigh); |
| 3668 |
sb = (b < 0);
|
| 3669 |
if (sb)
|
| 3670 |
b = -b; |
| 3671 |
if (div64(plow, phigh, b) != 0) |
| 3672 |
return 1; |
| 3673 |
if (sa ^ sb) {
|
| 3674 |
if (*plow > (1ULL << 63)) |
| 3675 |
return 1; |
| 3676 |
*plow = - *plow; |
| 3677 |
} else {
|
| 3678 |
if (*plow >= (1ULL << 63)) |
| 3679 |
return 1; |
| 3680 |
} |
| 3681 |
if (sa)
|
| 3682 |
*phigh = - *phigh; |
| 3683 |
return 0; |
| 3684 |
} |
| 3685 |
|
| 3686 |
void helper_mulq_EAX_T0(void) |
| 3687 |
{
|
| 3688 |
uint64_t r0, r1; |
| 3689 |
|
| 3690 |
mulu64(&r1, &r0, EAX, T0); |
| 3691 |
EAX = r0; |
| 3692 |
EDX = r1; |
| 3693 |
CC_DST = r0; |
| 3694 |
CC_SRC = r1; |
| 3695 |
} |
| 3696 |
|
| 3697 |
void helper_imulq_EAX_T0(void) |
| 3698 |
{
|
| 3699 |
uint64_t r0, r1; |
| 3700 |
|
| 3701 |
muls64(&r1, &r0, EAX, T0); |
| 3702 |
EAX = r0; |
| 3703 |
EDX = r1; |
| 3704 |
CC_DST = r0; |
| 3705 |
CC_SRC = ((int64_t)r1 != ((int64_t)r0 >> 63));
|
| 3706 |
} |
| 3707 |
|
| 3708 |
void helper_imulq_T0_T1(void) |
| 3709 |
{
|
| 3710 |
uint64_t r0, r1; |
| 3711 |
|
| 3712 |
muls64(&r1, &r0, T0, T1); |
| 3713 |
T0 = r0; |
| 3714 |
CC_DST = r0; |
| 3715 |
CC_SRC = ((int64_t)r1 != ((int64_t)r0 >> 63));
|
| 3716 |
} |
| 3717 |
|
| 3718 |
void helper_divq_EAX_T0(void) |
| 3719 |
{
|
| 3720 |
uint64_t r0, r1; |
| 3721 |
if (T0 == 0) { |
| 3722 |
raise_exception(EXCP00_DIVZ); |
| 3723 |
} |
| 3724 |
r0 = EAX; |
| 3725 |
r1 = EDX; |
| 3726 |
if (div64(&r0, &r1, T0))
|
| 3727 |
raise_exception(EXCP00_DIVZ); |
| 3728 |
EAX = r0; |
| 3729 |
EDX = r1; |
| 3730 |
} |
| 3731 |
|
| 3732 |
void helper_idivq_EAX_T0(void) |
| 3733 |
{
|
| 3734 |
uint64_t r0, r1; |
| 3735 |
if (T0 == 0) { |
| 3736 |
raise_exception(EXCP00_DIVZ); |
| 3737 |
} |
| 3738 |
r0 = EAX; |
| 3739 |
r1 = EDX; |
| 3740 |
if (idiv64(&r0, &r1, T0))
|
| 3741 |
raise_exception(EXCP00_DIVZ); |
| 3742 |
EAX = r0; |
| 3743 |
EDX = r1; |
| 3744 |
} |
| 3745 |
|
| 3746 |
void helper_bswapq_T0(void) |
| 3747 |
{
|
| 3748 |
T0 = bswap64(T0); |
| 3749 |
} |
| 3750 |
#endif
|
| 3751 |
|
| 3752 |
void helper_hlt(void) |
| 3753 |
{
|
| 3754 |
env->hflags &= ~HF_INHIBIT_IRQ_MASK; /* needed if sti is just before */
|
| 3755 |
env->hflags |= HF_HALTED_MASK; |
| 3756 |
env->exception_index = EXCP_HLT; |
| 3757 |
cpu_loop_exit(); |
| 3758 |
} |
| 3759 |
|
| 3760 |
void helper_monitor(void) |
| 3761 |
{
|
| 3762 |
if ((uint32_t)ECX != 0) |
| 3763 |
raise_exception(EXCP0D_GPF); |
| 3764 |
/* XXX: store address ? */
|
| 3765 |
} |
| 3766 |
|
| 3767 |
void helper_mwait(void) |
| 3768 |
{
|
| 3769 |
if ((uint32_t)ECX != 0) |
| 3770 |
raise_exception(EXCP0D_GPF); |
| 3771 |
/* XXX: not complete but not completely erroneous */
|
| 3772 |
if (env->cpu_index != 0 || env->next_cpu != NULL) { |
| 3773 |
/* more than one CPU: do not sleep because another CPU may
|
| 3774 |
wake this one */
|
| 3775 |
} else {
|
| 3776 |
helper_hlt(); |
| 3777 |
} |
| 3778 |
} |
| 3779 |
|
| 3780 |
float approx_rsqrt(float a) |
| 3781 |
{
|
| 3782 |
return 1.0 / sqrt(a); |
| 3783 |
} |
| 3784 |
|
| 3785 |
float approx_rcp(float a) |
| 3786 |
{
|
| 3787 |
return 1.0 / a; |
| 3788 |
} |
| 3789 |
|
| 3790 |
void update_fp_status(void) |
| 3791 |
{
|
| 3792 |
int rnd_type;
|
| 3793 |
|
| 3794 |
/* set rounding mode */
|
| 3795 |
switch(env->fpuc & RC_MASK) {
|
| 3796 |
default:
|
| 3797 |
case RC_NEAR:
|
| 3798 |
rnd_type = float_round_nearest_even; |
| 3799 |
break;
|
| 3800 |
case RC_DOWN:
|
| 3801 |
rnd_type = float_round_down; |
| 3802 |
break;
|
| 3803 |
case RC_UP:
|
| 3804 |
rnd_type = float_round_up; |
| 3805 |
break;
|
| 3806 |
case RC_CHOP:
|
| 3807 |
rnd_type = float_round_to_zero; |
| 3808 |
break;
|
| 3809 |
} |
| 3810 |
set_float_rounding_mode(rnd_type, &env->fp_status); |
| 3811 |
#ifdef FLOATX80
|
| 3812 |
switch((env->fpuc >> 8) & 3) { |
| 3813 |
case 0: |
| 3814 |
rnd_type = 32;
|
| 3815 |
break;
|
| 3816 |
case 2: |
| 3817 |
rnd_type = 64;
|
| 3818 |
break;
|
| 3819 |
case 3: |
| 3820 |
default:
|
| 3821 |
rnd_type = 80;
|
| 3822 |
break;
|
| 3823 |
} |
| 3824 |
set_floatx80_rounding_precision(rnd_type, &env->fp_status); |
| 3825 |
#endif
|
| 3826 |
} |
| 3827 |
|
| 3828 |
#if !defined(CONFIG_USER_ONLY)
|
| 3829 |
|
| 3830 |
#define MMUSUFFIX _mmu
|
| 3831 |
#define GETPC() (__builtin_return_address(0)) |
| 3832 |
|
| 3833 |
#define SHIFT 0 |
| 3834 |
#include "softmmu_template.h" |
| 3835 |
|
| 3836 |
#define SHIFT 1 |
| 3837 |
#include "softmmu_template.h" |
| 3838 |
|
| 3839 |
#define SHIFT 2 |
| 3840 |
#include "softmmu_template.h" |
| 3841 |
|
| 3842 |
#define SHIFT 3 |
| 3843 |
#include "softmmu_template.h" |
| 3844 |
|
| 3845 |
#endif
|
| 3846 |
|
| 3847 |
/* try to fill the TLB and return an exception if error. If retaddr is
|
| 3848 |
NULL, it means that the function was called in C code (i.e. not
|
| 3849 |
from generated code or from helper.c) */
|
| 3850 |
/* XXX: fix it to restore all registers */
|
| 3851 |
void tlb_fill(target_ulong addr, int is_write, int is_user, void *retaddr) |
| 3852 |
{
|
| 3853 |
TranslationBlock *tb; |
| 3854 |
int ret;
|
| 3855 |
unsigned long pc; |
| 3856 |
CPUX86State *saved_env; |
| 3857 |
|
| 3858 |
/* XXX: hack to restore env in all cases, even if not called from
|
| 3859 |
generated code */
|
| 3860 |
saved_env = env; |
| 3861 |
env = cpu_single_env; |
| 3862 |
|
| 3863 |
ret = cpu_x86_handle_mmu_fault(env, addr, is_write, is_user, 1);
|
| 3864 |
if (ret) {
|
| 3865 |
if (retaddr) {
|
| 3866 |
/* now we have a real cpu fault */
|
| 3867 |
pc = (unsigned long)retaddr; |
| 3868 |
tb = tb_find_pc(pc); |
| 3869 |
if (tb) {
|
| 3870 |
/* the PC is inside the translated code. It means that we have
|
| 3871 |
a virtual CPU fault */
|
| 3872 |
cpu_restore_state(tb, env, pc, NULL);
|
| 3873 |
} |
| 3874 |
} |
| 3875 |
if (retaddr)
|
| 3876 |
raise_exception_err(env->exception_index, env->error_code); |
| 3877 |
else
|
| 3878 |
raise_exception_err_norestore(env->exception_index, env->error_code); |
| 3879 |
} |
| 3880 |
env = saved_env; |
| 3881 |
} |