root / target-i386 / helper.c @ 61a8c4ec
History | View | Annotate | Download (74.5 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 |
fprintf(logfile, "raise_exception line=%d\n", __LINE__);\
|
| 28 |
(raise_exception_err)(a, b);\
|
| 29 |
} while (0)
|
| 30 |
#endif
|
| 31 |
|
| 32 |
const uint8_t parity_table[256] = { |
| 33 |
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
| 34 |
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
| 35 |
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
| 36 |
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
| 37 |
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
| 38 |
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
| 39 |
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
| 40 |
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
| 41 |
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
| 42 |
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
| 43 |
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
| 44 |
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
| 45 |
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
| 46 |
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
| 47 |
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
| 48 |
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
| 49 |
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
| 50 |
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
| 51 |
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
| 52 |
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
| 53 |
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
| 54 |
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
| 55 |
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
| 56 |
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
| 57 |
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
| 58 |
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
| 59 |
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
| 60 |
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
| 61 |
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
| 62 |
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
| 63 |
CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
| 64 |
0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
| 65 |
}; |
| 66 |
|
| 67 |
/* modulo 17 table */
|
| 68 |
const uint8_t rclw_table[32] = { |
| 69 |
0, 1, 2, 3, 4, 5, 6, 7, |
| 70 |
8, 9,10,11,12,13,14,15, |
| 71 |
16, 0, 1, 2, 3, 4, 5, 6, |
| 72 |
7, 8, 9,10,11,12,13,14, |
| 73 |
}; |
| 74 |
|
| 75 |
/* modulo 9 table */
|
| 76 |
const uint8_t rclb_table[32] = { |
| 77 |
0, 1, 2, 3, 4, 5, 6, 7, |
| 78 |
8, 0, 1, 2, 3, 4, 5, 6, |
| 79 |
7, 8, 0, 1, 2, 3, 4, 5, |
| 80 |
6, 7, 8, 0, 1, 2, 3, 4, |
| 81 |
}; |
| 82 |
|
| 83 |
const CPU86_LDouble f15rk[7] = |
| 84 |
{
|
| 85 |
0.00000000000000000000L, |
| 86 |
1.00000000000000000000L, |
| 87 |
3.14159265358979323851L, /*pi*/ |
| 88 |
0.30102999566398119523L, /*lg2*/ |
| 89 |
0.69314718055994530943L, /*ln2*/ |
| 90 |
1.44269504088896340739L, /*l2e*/ |
| 91 |
3.32192809488736234781L, /*l2t*/ |
| 92 |
}; |
| 93 |
|
| 94 |
/* thread support */
|
| 95 |
|
| 96 |
spinlock_t global_cpu_lock = SPIN_LOCK_UNLOCKED; |
| 97 |
|
| 98 |
void cpu_lock(void) |
| 99 |
{
|
| 100 |
spin_lock(&global_cpu_lock); |
| 101 |
} |
| 102 |
|
| 103 |
void cpu_unlock(void) |
| 104 |
{
|
| 105 |
spin_unlock(&global_cpu_lock); |
| 106 |
} |
| 107 |
|
| 108 |
void cpu_loop_exit(void) |
| 109 |
{
|
| 110 |
/* NOTE: the register at this point must be saved by hand because
|
| 111 |
longjmp restore them */
|
| 112 |
regs_to_env(); |
| 113 |
longjmp(env->jmp_env, 1);
|
| 114 |
} |
| 115 |
|
| 116 |
/* return non zero if error */
|
| 117 |
static inline int load_segment(uint32_t *e1_ptr, uint32_t *e2_ptr, |
| 118 |
int selector)
|
| 119 |
{
|
| 120 |
SegmentCache *dt; |
| 121 |
int index;
|
| 122 |
uint8_t *ptr; |
| 123 |
|
| 124 |
if (selector & 0x4) |
| 125 |
dt = &env->ldt; |
| 126 |
else
|
| 127 |
dt = &env->gdt; |
| 128 |
index = selector & ~7;
|
| 129 |
if ((index + 7) > dt->limit) |
| 130 |
return -1; |
| 131 |
ptr = dt->base + index; |
| 132 |
*e1_ptr = ldl_kernel(ptr); |
| 133 |
*e2_ptr = ldl_kernel(ptr + 4);
|
| 134 |
return 0; |
| 135 |
} |
| 136 |
|
| 137 |
static inline unsigned int get_seg_limit(uint32_t e1, uint32_t e2) |
| 138 |
{
|
| 139 |
unsigned int limit; |
| 140 |
limit = (e1 & 0xffff) | (e2 & 0x000f0000); |
| 141 |
if (e2 & DESC_G_MASK)
|
| 142 |
limit = (limit << 12) | 0xfff; |
| 143 |
return limit;
|
| 144 |
} |
| 145 |
|
| 146 |
static inline uint8_t *get_seg_base(uint32_t e1, uint32_t e2) |
| 147 |
{
|
| 148 |
return (uint8_t *)((e1 >> 16) | ((e2 & 0xff) << 16) | (e2 & 0xff000000)); |
| 149 |
} |
| 150 |
|
| 151 |
static inline void load_seg_cache_raw_dt(SegmentCache *sc, uint32_t e1, uint32_t e2) |
| 152 |
{
|
| 153 |
sc->base = get_seg_base(e1, e2); |
| 154 |
sc->limit = get_seg_limit(e1, e2); |
| 155 |
sc->flags = e2; |
| 156 |
} |
| 157 |
|
| 158 |
/* init the segment cache in vm86 mode. */
|
| 159 |
static inline void load_seg_vm(int seg, int selector) |
| 160 |
{
|
| 161 |
selector &= 0xffff;
|
| 162 |
cpu_x86_load_seg_cache(env, seg, selector, |
| 163 |
(uint8_t *)(selector << 4), 0xffff, 0); |
| 164 |
} |
| 165 |
|
| 166 |
static inline void get_ss_esp_from_tss(uint32_t *ss_ptr, |
| 167 |
uint32_t *esp_ptr, int dpl)
|
| 168 |
{
|
| 169 |
int type, index, shift;
|
| 170 |
|
| 171 |
#if 0
|
| 172 |
{
|
| 173 |
int i;
|
| 174 |
printf("TR: base=%p limit=%x\n", env->tr.base, env->tr.limit);
|
| 175 |
for(i=0;i<env->tr.limit;i++) {
|
| 176 |
printf("%02x ", env->tr.base[i]);
|
| 177 |
if ((i & 7) == 7) printf("\n");
|
| 178 |
}
|
| 179 |
printf("\n");
|
| 180 |
}
|
| 181 |
#endif
|
| 182 |
|
| 183 |
if (!(env->tr.flags & DESC_P_MASK))
|
| 184 |
cpu_abort(env, "invalid tss");
|
| 185 |
type = (env->tr.flags >> DESC_TYPE_SHIFT) & 0xf;
|
| 186 |
if ((type & 7) != 1) |
| 187 |
cpu_abort(env, "invalid tss type");
|
| 188 |
shift = type >> 3;
|
| 189 |
index = (dpl * 4 + 2) << shift; |
| 190 |
if (index + (4 << shift) - 1 > env->tr.limit) |
| 191 |
raise_exception_err(EXCP0A_TSS, env->tr.selector & 0xfffc);
|
| 192 |
if (shift == 0) { |
| 193 |
*esp_ptr = lduw_kernel(env->tr.base + index); |
| 194 |
*ss_ptr = lduw_kernel(env->tr.base + index + 2);
|
| 195 |
} else {
|
| 196 |
*esp_ptr = ldl_kernel(env->tr.base + index); |
| 197 |
*ss_ptr = lduw_kernel(env->tr.base + index + 4);
|
| 198 |
} |
| 199 |
} |
| 200 |
|
| 201 |
/* XXX: merge with load_seg() */
|
| 202 |
static void tss_load_seg(int seg_reg, int selector) |
| 203 |
{
|
| 204 |
uint32_t e1, e2; |
| 205 |
int rpl, dpl, cpl;
|
| 206 |
|
| 207 |
if ((selector & 0xfffc) != 0) { |
| 208 |
if (load_segment(&e1, &e2, selector) != 0) |
| 209 |
raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
|
| 210 |
if (!(e2 & DESC_S_MASK))
|
| 211 |
raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
|
| 212 |
rpl = selector & 3;
|
| 213 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 214 |
cpl = env->hflags & HF_CPL_MASK; |
| 215 |
if (seg_reg == R_CS) {
|
| 216 |
if (!(e2 & DESC_CS_MASK))
|
| 217 |
raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
|
| 218 |
if (dpl != rpl)
|
| 219 |
raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
|
| 220 |
if ((e2 & DESC_C_MASK) && dpl > rpl)
|
| 221 |
raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
|
| 222 |
|
| 223 |
} else if (seg_reg == R_SS) { |
| 224 |
/* SS must be writable data */
|
| 225 |
if ((e2 & DESC_CS_MASK) || !(e2 & DESC_W_MASK))
|
| 226 |
raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
|
| 227 |
if (dpl != cpl || dpl != rpl)
|
| 228 |
raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
|
| 229 |
} else {
|
| 230 |
/* not readable code */
|
| 231 |
if ((e2 & DESC_CS_MASK) && !(e2 & DESC_R_MASK))
|
| 232 |
raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
|
| 233 |
/* if data or non conforming code, checks the rights */
|
| 234 |
if (((e2 >> DESC_TYPE_SHIFT) & 0xf) < 12) { |
| 235 |
if (dpl < cpl || dpl < rpl)
|
| 236 |
raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
|
| 237 |
} |
| 238 |
} |
| 239 |
if (!(e2 & DESC_P_MASK))
|
| 240 |
raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc);
|
| 241 |
cpu_x86_load_seg_cache(env, seg_reg, selector, |
| 242 |
get_seg_base(e1, e2), |
| 243 |
get_seg_limit(e1, e2), |
| 244 |
e2); |
| 245 |
} else {
|
| 246 |
if (seg_reg == R_SS || seg_reg == R_CS)
|
| 247 |
raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
|
| 248 |
} |
| 249 |
} |
| 250 |
|
| 251 |
#define SWITCH_TSS_JMP 0 |
| 252 |
#define SWITCH_TSS_IRET 1 |
| 253 |
#define SWITCH_TSS_CALL 2 |
| 254 |
|
| 255 |
/* XXX: restore CPU state in registers (PowerPC case) */
|
| 256 |
static void switch_tss(int tss_selector, |
| 257 |
uint32_t e1, uint32_t e2, int source,
|
| 258 |
uint32_t next_eip) |
| 259 |
{
|
| 260 |
int tss_limit, tss_limit_max, type, old_tss_limit_max, old_type, v1, v2, i;
|
| 261 |
uint8_t *tss_base; |
| 262 |
uint32_t new_regs[8], new_segs[6]; |
| 263 |
uint32_t new_eflags, new_eip, new_cr3, new_ldt, new_trap; |
| 264 |
uint32_t old_eflags, eflags_mask; |
| 265 |
SegmentCache *dt; |
| 266 |
int index;
|
| 267 |
uint8_t *ptr; |
| 268 |
|
| 269 |
type = (e2 >> DESC_TYPE_SHIFT) & 0xf;
|
| 270 |
#ifdef DEBUG_PCALL
|
| 271 |
if (loglevel & CPU_LOG_PCALL)
|
| 272 |
fprintf(logfile, "switch_tss: sel=0x%04x type=%d src=%d\n", tss_selector, type, source);
|
| 273 |
#endif
|
| 274 |
|
| 275 |
/* if task gate, we read the TSS segment and we load it */
|
| 276 |
if (type == 5) { |
| 277 |
if (!(e2 & DESC_P_MASK))
|
| 278 |
raise_exception_err(EXCP0B_NOSEG, tss_selector & 0xfffc);
|
| 279 |
tss_selector = e1 >> 16;
|
| 280 |
if (tss_selector & 4) |
| 281 |
raise_exception_err(EXCP0A_TSS, tss_selector & 0xfffc);
|
| 282 |
if (load_segment(&e1, &e2, tss_selector) != 0) |
| 283 |
raise_exception_err(EXCP0D_GPF, tss_selector & 0xfffc);
|
| 284 |
if (e2 & DESC_S_MASK)
|
| 285 |
raise_exception_err(EXCP0D_GPF, tss_selector & 0xfffc);
|
| 286 |
type = (e2 >> DESC_TYPE_SHIFT) & 0xf;
|
| 287 |
if ((type & 7) != 1) |
| 288 |
raise_exception_err(EXCP0D_GPF, tss_selector & 0xfffc);
|
| 289 |
} |
| 290 |
|
| 291 |
if (!(e2 & DESC_P_MASK))
|
| 292 |
raise_exception_err(EXCP0B_NOSEG, tss_selector & 0xfffc);
|
| 293 |
|
| 294 |
if (type & 8) |
| 295 |
tss_limit_max = 103;
|
| 296 |
else
|
| 297 |
tss_limit_max = 43;
|
| 298 |
tss_limit = get_seg_limit(e1, e2); |
| 299 |
tss_base = get_seg_base(e1, e2); |
| 300 |
if ((tss_selector & 4) != 0 || |
| 301 |
tss_limit < tss_limit_max) |
| 302 |
raise_exception_err(EXCP0A_TSS, tss_selector & 0xfffc);
|
| 303 |
old_type = (env->tr.flags >> DESC_TYPE_SHIFT) & 0xf;
|
| 304 |
if (old_type & 8) |
| 305 |
old_tss_limit_max = 103;
|
| 306 |
else
|
| 307 |
old_tss_limit_max = 43;
|
| 308 |
|
| 309 |
/* read all the registers from the new TSS */
|
| 310 |
if (type & 8) { |
| 311 |
/* 32 bit */
|
| 312 |
new_cr3 = ldl_kernel(tss_base + 0x1c);
|
| 313 |
new_eip = ldl_kernel(tss_base + 0x20);
|
| 314 |
new_eflags = ldl_kernel(tss_base + 0x24);
|
| 315 |
for(i = 0; i < 8; i++) |
| 316 |
new_regs[i] = ldl_kernel(tss_base + (0x28 + i * 4)); |
| 317 |
for(i = 0; i < 6; i++) |
| 318 |
new_segs[i] = lduw_kernel(tss_base + (0x48 + i * 4)); |
| 319 |
new_ldt = lduw_kernel(tss_base + 0x60);
|
| 320 |
new_trap = ldl_kernel(tss_base + 0x64);
|
| 321 |
} else {
|
| 322 |
/* 16 bit */
|
| 323 |
new_cr3 = 0;
|
| 324 |
new_eip = lduw_kernel(tss_base + 0x0e);
|
| 325 |
new_eflags = lduw_kernel(tss_base + 0x10);
|
| 326 |
for(i = 0; i < 8; i++) |
| 327 |
new_regs[i] = lduw_kernel(tss_base + (0x12 + i * 2)) | 0xffff0000; |
| 328 |
for(i = 0; i < 4; i++) |
| 329 |
new_segs[i] = lduw_kernel(tss_base + (0x22 + i * 4)); |
| 330 |
new_ldt = lduw_kernel(tss_base + 0x2a);
|
| 331 |
new_segs[R_FS] = 0;
|
| 332 |
new_segs[R_GS] = 0;
|
| 333 |
new_trap = 0;
|
| 334 |
} |
| 335 |
|
| 336 |
/* NOTE: we must avoid memory exceptions during the task switch,
|
| 337 |
so we make dummy accesses before */
|
| 338 |
/* XXX: it can still fail in some cases, so a bigger hack is
|
| 339 |
necessary to valid the TLB after having done the accesses */
|
| 340 |
|
| 341 |
v1 = ldub_kernel(env->tr.base); |
| 342 |
v2 = ldub(env->tr.base + old_tss_limit_max); |
| 343 |
stb_kernel(env->tr.base, v1); |
| 344 |
stb_kernel(env->tr.base + old_tss_limit_max, v2); |
| 345 |
|
| 346 |
/* clear busy bit (it is restartable) */
|
| 347 |
if (source == SWITCH_TSS_JMP || source == SWITCH_TSS_IRET) {
|
| 348 |
uint8_t *ptr; |
| 349 |
uint32_t e2; |
| 350 |
ptr = env->gdt.base + (env->tr.selector & ~7);
|
| 351 |
e2 = ldl_kernel(ptr + 4);
|
| 352 |
e2 &= ~DESC_TSS_BUSY_MASK; |
| 353 |
stl_kernel(ptr + 4, e2);
|
| 354 |
} |
| 355 |
old_eflags = compute_eflags(); |
| 356 |
if (source == SWITCH_TSS_IRET)
|
| 357 |
old_eflags &= ~NT_MASK; |
| 358 |
|
| 359 |
/* save the current state in the old TSS */
|
| 360 |
if (type & 8) { |
| 361 |
/* 32 bit */
|
| 362 |
stl_kernel(env->tr.base + 0x20, next_eip);
|
| 363 |
stl_kernel(env->tr.base + 0x24, old_eflags);
|
| 364 |
stl_kernel(env->tr.base + (0x28 + 0 * 4), EAX); |
| 365 |
stl_kernel(env->tr.base + (0x28 + 1 * 4), ECX); |
| 366 |
stl_kernel(env->tr.base + (0x28 + 2 * 4), EDX); |
| 367 |
stl_kernel(env->tr.base + (0x28 + 3 * 4), EBX); |
| 368 |
stl_kernel(env->tr.base + (0x28 + 4 * 4), ESP); |
| 369 |
stl_kernel(env->tr.base + (0x28 + 5 * 4), EBP); |
| 370 |
stl_kernel(env->tr.base + (0x28 + 6 * 4), ESI); |
| 371 |
stl_kernel(env->tr.base + (0x28 + 7 * 4), EDI); |
| 372 |
for(i = 0; i < 6; i++) |
| 373 |
stw_kernel(env->tr.base + (0x48 + i * 4), env->segs[i].selector); |
| 374 |
} else {
|
| 375 |
/* 16 bit */
|
| 376 |
stw_kernel(env->tr.base + 0x0e, next_eip);
|
| 377 |
stw_kernel(env->tr.base + 0x10, old_eflags);
|
| 378 |
stw_kernel(env->tr.base + (0x12 + 0 * 2), EAX); |
| 379 |
stw_kernel(env->tr.base + (0x12 + 1 * 2), ECX); |
| 380 |
stw_kernel(env->tr.base + (0x12 + 2 * 2), EDX); |
| 381 |
stw_kernel(env->tr.base + (0x12 + 3 * 2), EBX); |
| 382 |
stw_kernel(env->tr.base + (0x12 + 4 * 2), ESP); |
| 383 |
stw_kernel(env->tr.base + (0x12 + 5 * 2), EBP); |
| 384 |
stw_kernel(env->tr.base + (0x12 + 6 * 2), ESI); |
| 385 |
stw_kernel(env->tr.base + (0x12 + 7 * 2), EDI); |
| 386 |
for(i = 0; i < 4; i++) |
| 387 |
stw_kernel(env->tr.base + (0x22 + i * 4), env->segs[i].selector); |
| 388 |
} |
| 389 |
|
| 390 |
/* now if an exception occurs, it will occurs in the next task
|
| 391 |
context */
|
| 392 |
|
| 393 |
if (source == SWITCH_TSS_CALL) {
|
| 394 |
stw_kernel(tss_base, env->tr.selector); |
| 395 |
new_eflags |= NT_MASK; |
| 396 |
} |
| 397 |
|
| 398 |
/* set busy bit */
|
| 399 |
if (source == SWITCH_TSS_JMP || source == SWITCH_TSS_CALL) {
|
| 400 |
uint8_t *ptr; |
| 401 |
uint32_t e2; |
| 402 |
ptr = env->gdt.base + (tss_selector & ~7);
|
| 403 |
e2 = ldl_kernel(ptr + 4);
|
| 404 |
e2 |= DESC_TSS_BUSY_MASK; |
| 405 |
stl_kernel(ptr + 4, e2);
|
| 406 |
} |
| 407 |
|
| 408 |
/* set the new CPU state */
|
| 409 |
/* from this point, any exception which occurs can give problems */
|
| 410 |
env->cr[0] |= CR0_TS_MASK;
|
| 411 |
env->hflags |= HF_TS_MASK; |
| 412 |
env->tr.selector = tss_selector; |
| 413 |
env->tr.base = tss_base; |
| 414 |
env->tr.limit = tss_limit; |
| 415 |
env->tr.flags = e2 & ~DESC_TSS_BUSY_MASK; |
| 416 |
|
| 417 |
if ((type & 8) && (env->cr[0] & CR0_PG_MASK)) { |
| 418 |
cpu_x86_update_cr3(env, new_cr3); |
| 419 |
} |
| 420 |
|
| 421 |
/* load all registers without an exception, then reload them with
|
| 422 |
possible exception */
|
| 423 |
env->eip = new_eip; |
| 424 |
eflags_mask = TF_MASK | AC_MASK | ID_MASK | |
| 425 |
IF_MASK | IOPL_MASK | VM_MASK | RF_MASK | NT_MASK; |
| 426 |
if (!(type & 8)) |
| 427 |
eflags_mask &= 0xffff;
|
| 428 |
load_eflags(new_eflags, eflags_mask); |
| 429 |
/* XXX: what to do in 16 bit case ? */
|
| 430 |
EAX = new_regs[0];
|
| 431 |
ECX = new_regs[1];
|
| 432 |
EDX = new_regs[2];
|
| 433 |
EBX = new_regs[3];
|
| 434 |
ESP = new_regs[4];
|
| 435 |
EBP = new_regs[5];
|
| 436 |
ESI = new_regs[6];
|
| 437 |
EDI = new_regs[7];
|
| 438 |
if (new_eflags & VM_MASK) {
|
| 439 |
for(i = 0; i < 6; i++) |
| 440 |
load_seg_vm(i, new_segs[i]); |
| 441 |
/* in vm86, CPL is always 3 */
|
| 442 |
cpu_x86_set_cpl(env, 3);
|
| 443 |
} else {
|
| 444 |
/* CPL is set the RPL of CS */
|
| 445 |
cpu_x86_set_cpl(env, new_segs[R_CS] & 3);
|
| 446 |
/* first just selectors as the rest may trigger exceptions */
|
| 447 |
for(i = 0; i < 6; i++) |
| 448 |
cpu_x86_load_seg_cache(env, i, new_segs[i], NULL, 0, 0); |
| 449 |
} |
| 450 |
|
| 451 |
env->ldt.selector = new_ldt & ~4;
|
| 452 |
env->ldt.base = NULL;
|
| 453 |
env->ldt.limit = 0;
|
| 454 |
env->ldt.flags = 0;
|
| 455 |
|
| 456 |
/* load the LDT */
|
| 457 |
if (new_ldt & 4) |
| 458 |
raise_exception_err(EXCP0A_TSS, new_ldt & 0xfffc);
|
| 459 |
|
| 460 |
if ((new_ldt & 0xfffc) != 0) { |
| 461 |
dt = &env->gdt; |
| 462 |
index = new_ldt & ~7;
|
| 463 |
if ((index + 7) > dt->limit) |
| 464 |
raise_exception_err(EXCP0A_TSS, new_ldt & 0xfffc);
|
| 465 |
ptr = dt->base + index; |
| 466 |
e1 = ldl_kernel(ptr); |
| 467 |
e2 = ldl_kernel(ptr + 4);
|
| 468 |
if ((e2 & DESC_S_MASK) || ((e2 >> DESC_TYPE_SHIFT) & 0xf) != 2) |
| 469 |
raise_exception_err(EXCP0A_TSS, new_ldt & 0xfffc);
|
| 470 |
if (!(e2 & DESC_P_MASK))
|
| 471 |
raise_exception_err(EXCP0A_TSS, new_ldt & 0xfffc);
|
| 472 |
load_seg_cache_raw_dt(&env->ldt, e1, e2); |
| 473 |
} |
| 474 |
|
| 475 |
/* load the segments */
|
| 476 |
if (!(new_eflags & VM_MASK)) {
|
| 477 |
tss_load_seg(R_CS, new_segs[R_CS]); |
| 478 |
tss_load_seg(R_SS, new_segs[R_SS]); |
| 479 |
tss_load_seg(R_ES, new_segs[R_ES]); |
| 480 |
tss_load_seg(R_DS, new_segs[R_DS]); |
| 481 |
tss_load_seg(R_FS, new_segs[R_FS]); |
| 482 |
tss_load_seg(R_GS, new_segs[R_GS]); |
| 483 |
} |
| 484 |
|
| 485 |
/* check that EIP is in the CS segment limits */
|
| 486 |
if (new_eip > env->segs[R_CS].limit) {
|
| 487 |
/* XXX: different exception if CALL ? */
|
| 488 |
raise_exception_err(EXCP0D_GPF, 0);
|
| 489 |
} |
| 490 |
} |
| 491 |
|
| 492 |
/* check if Port I/O is allowed in TSS */
|
| 493 |
static inline void check_io(int addr, int size) |
| 494 |
{
|
| 495 |
int io_offset, val, mask;
|
| 496 |
|
| 497 |
/* TSS must be a valid 32 bit one */
|
| 498 |
if (!(env->tr.flags & DESC_P_MASK) ||
|
| 499 |
((env->tr.flags >> DESC_TYPE_SHIFT) & 0xf) != 9 || |
| 500 |
env->tr.limit < 103)
|
| 501 |
goto fail;
|
| 502 |
io_offset = lduw_kernel(env->tr.base + 0x66);
|
| 503 |
io_offset += (addr >> 3);
|
| 504 |
/* Note: the check needs two bytes */
|
| 505 |
if ((io_offset + 1) > env->tr.limit) |
| 506 |
goto fail;
|
| 507 |
val = lduw_kernel(env->tr.base + io_offset); |
| 508 |
val >>= (addr & 7);
|
| 509 |
mask = (1 << size) - 1; |
| 510 |
/* all bits must be zero to allow the I/O */
|
| 511 |
if ((val & mask) != 0) { |
| 512 |
fail:
|
| 513 |
raise_exception_err(EXCP0D_GPF, 0);
|
| 514 |
} |
| 515 |
} |
| 516 |
|
| 517 |
void check_iob_T0(void) |
| 518 |
{
|
| 519 |
check_io(T0, 1);
|
| 520 |
} |
| 521 |
|
| 522 |
void check_iow_T0(void) |
| 523 |
{
|
| 524 |
check_io(T0, 2);
|
| 525 |
} |
| 526 |
|
| 527 |
void check_iol_T0(void) |
| 528 |
{
|
| 529 |
check_io(T0, 4);
|
| 530 |
} |
| 531 |
|
| 532 |
void check_iob_DX(void) |
| 533 |
{
|
| 534 |
check_io(EDX & 0xffff, 1); |
| 535 |
} |
| 536 |
|
| 537 |
void check_iow_DX(void) |
| 538 |
{
|
| 539 |
check_io(EDX & 0xffff, 2); |
| 540 |
} |
| 541 |
|
| 542 |
void check_iol_DX(void) |
| 543 |
{
|
| 544 |
check_io(EDX & 0xffff, 4); |
| 545 |
} |
| 546 |
|
| 547 |
static inline unsigned int get_sp_mask(unsigned int e2) |
| 548 |
{
|
| 549 |
if (e2 & DESC_B_MASK)
|
| 550 |
return 0xffffffff; |
| 551 |
else
|
| 552 |
return 0xffff; |
| 553 |
} |
| 554 |
|
| 555 |
/* XXX: add a is_user flag to have proper security support */
|
| 556 |
#define PUSHW(ssp, sp, sp_mask, val)\
|
| 557 |
{\
|
| 558 |
sp -= 2;\
|
| 559 |
stw_kernel((ssp) + (sp & (sp_mask)), (val));\ |
| 560 |
} |
| 561 |
|
| 562 |
#define PUSHL(ssp, sp, sp_mask, val)\
|
| 563 |
{\
|
| 564 |
sp -= 4;\
|
| 565 |
stl_kernel((ssp) + (sp & (sp_mask)), (val));\ |
| 566 |
} |
| 567 |
|
| 568 |
#define POPW(ssp, sp, sp_mask, val)\
|
| 569 |
{\
|
| 570 |
val = lduw_kernel((ssp) + (sp & (sp_mask)));\ |
| 571 |
sp += 2;\
|
| 572 |
} |
| 573 |
|
| 574 |
#define POPL(ssp, sp, sp_mask, val)\
|
| 575 |
{\
|
| 576 |
val = ldl_kernel((ssp) + (sp & (sp_mask)));\ |
| 577 |
sp += 4;\
|
| 578 |
} |
| 579 |
|
| 580 |
/* protected mode interrupt */
|
| 581 |
static void do_interrupt_protected(int intno, int is_int, int error_code, |
| 582 |
unsigned int next_eip, int is_hw) |
| 583 |
{
|
| 584 |
SegmentCache *dt; |
| 585 |
uint8_t *ptr, *ssp; |
| 586 |
int type, dpl, selector, ss_dpl, cpl, sp_mask;
|
| 587 |
int has_error_code, new_stack, shift;
|
| 588 |
uint32_t e1, e2, offset, ss, esp, ss_e1, ss_e2; |
| 589 |
uint32_t old_eip; |
| 590 |
|
| 591 |
has_error_code = 0;
|
| 592 |
if (!is_int && !is_hw) {
|
| 593 |
switch(intno) {
|
| 594 |
case 8: |
| 595 |
case 10: |
| 596 |
case 11: |
| 597 |
case 12: |
| 598 |
case 13: |
| 599 |
case 14: |
| 600 |
case 17: |
| 601 |
has_error_code = 1;
|
| 602 |
break;
|
| 603 |
} |
| 604 |
} |
| 605 |
if (is_int)
|
| 606 |
old_eip = next_eip; |
| 607 |
else
|
| 608 |
old_eip = env->eip; |
| 609 |
|
| 610 |
dt = &env->idt; |
| 611 |
if (intno * 8 + 7 > dt->limit) |
| 612 |
raise_exception_err(EXCP0D_GPF, intno * 8 + 2); |
| 613 |
ptr = dt->base + intno * 8;
|
| 614 |
e1 = ldl_kernel(ptr); |
| 615 |
e2 = ldl_kernel(ptr + 4);
|
| 616 |
/* check gate type */
|
| 617 |
type = (e2 >> DESC_TYPE_SHIFT) & 0x1f;
|
| 618 |
switch(type) {
|
| 619 |
case 5: /* task gate */ |
| 620 |
/* must do that check here to return the correct error code */
|
| 621 |
if (!(e2 & DESC_P_MASK))
|
| 622 |
raise_exception_err(EXCP0B_NOSEG, intno * 8 + 2); |
| 623 |
switch_tss(intno * 8, e1, e2, SWITCH_TSS_CALL, old_eip);
|
| 624 |
if (has_error_code) {
|
| 625 |
int mask;
|
| 626 |
/* push the error code */
|
| 627 |
shift = (env->segs[R_CS].flags >> DESC_B_SHIFT) & 1;
|
| 628 |
if (env->segs[R_SS].flags & DESC_B_MASK)
|
| 629 |
mask = 0xffffffff;
|
| 630 |
else
|
| 631 |
mask = 0xffff;
|
| 632 |
esp = (ESP - (2 << shift)) & mask;
|
| 633 |
ssp = env->segs[R_SS].base + esp; |
| 634 |
if (shift)
|
| 635 |
stl_kernel(ssp, error_code); |
| 636 |
else
|
| 637 |
stw_kernel(ssp, error_code); |
| 638 |
ESP = (esp & mask) | (ESP & ~mask); |
| 639 |
} |
| 640 |
return;
|
| 641 |
case 6: /* 286 interrupt gate */ |
| 642 |
case 7: /* 286 trap gate */ |
| 643 |
case 14: /* 386 interrupt gate */ |
| 644 |
case 15: /* 386 trap gate */ |
| 645 |
break;
|
| 646 |
default:
|
| 647 |
raise_exception_err(EXCP0D_GPF, intno * 8 + 2); |
| 648 |
break;
|
| 649 |
} |
| 650 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 651 |
cpl = env->hflags & HF_CPL_MASK; |
| 652 |
/* check privledge if software int */
|
| 653 |
if (is_int && dpl < cpl)
|
| 654 |
raise_exception_err(EXCP0D_GPF, intno * 8 + 2); |
| 655 |
/* check valid bit */
|
| 656 |
if (!(e2 & DESC_P_MASK))
|
| 657 |
raise_exception_err(EXCP0B_NOSEG, intno * 8 + 2); |
| 658 |
selector = e1 >> 16;
|
| 659 |
offset = (e2 & 0xffff0000) | (e1 & 0x0000ffff); |
| 660 |
if ((selector & 0xfffc) == 0) |
| 661 |
raise_exception_err(EXCP0D_GPF, 0);
|
| 662 |
|
| 663 |
if (load_segment(&e1, &e2, selector) != 0) |
| 664 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 665 |
if (!(e2 & DESC_S_MASK) || !(e2 & (DESC_CS_MASK)))
|
| 666 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 667 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 668 |
if (dpl > cpl)
|
| 669 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 670 |
if (!(e2 & DESC_P_MASK))
|
| 671 |
raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc);
|
| 672 |
if (!(e2 & DESC_C_MASK) && dpl < cpl) {
|
| 673 |
/* to inner priviledge */
|
| 674 |
get_ss_esp_from_tss(&ss, &esp, dpl); |
| 675 |
if ((ss & 0xfffc) == 0) |
| 676 |
raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
| 677 |
if ((ss & 3) != dpl) |
| 678 |
raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
| 679 |
if (load_segment(&ss_e1, &ss_e2, ss) != 0) |
| 680 |
raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
| 681 |
ss_dpl = (ss_e2 >> DESC_DPL_SHIFT) & 3;
|
| 682 |
if (ss_dpl != dpl)
|
| 683 |
raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
| 684 |
if (!(ss_e2 & DESC_S_MASK) ||
|
| 685 |
(ss_e2 & DESC_CS_MASK) || |
| 686 |
!(ss_e2 & DESC_W_MASK)) |
| 687 |
raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
| 688 |
if (!(ss_e2 & DESC_P_MASK))
|
| 689 |
raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
| 690 |
new_stack = 1;
|
| 691 |
sp_mask = get_sp_mask(ss_e2); |
| 692 |
ssp = get_seg_base(ss_e1, ss_e2); |
| 693 |
} else if ((e2 & DESC_C_MASK) || dpl == cpl) { |
| 694 |
/* to same priviledge */
|
| 695 |
if (env->eflags & VM_MASK)
|
| 696 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 697 |
new_stack = 0;
|
| 698 |
sp_mask = get_sp_mask(env->segs[R_SS].flags); |
| 699 |
ssp = env->segs[R_SS].base; |
| 700 |
esp = ESP; |
| 701 |
dpl = cpl; |
| 702 |
} else {
|
| 703 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 704 |
new_stack = 0; /* avoid warning */ |
| 705 |
sp_mask = 0; /* avoid warning */ |
| 706 |
ssp = NULL; /* avoid warning */ |
| 707 |
esp = 0; /* avoid warning */ |
| 708 |
} |
| 709 |
|
| 710 |
shift = type >> 3;
|
| 711 |
|
| 712 |
#if 0
|
| 713 |
/* XXX: check that enough room is available */
|
| 714 |
push_size = 6 + (new_stack << 2) + (has_error_code << 1);
|
| 715 |
if (env->eflags & VM_MASK)
|
| 716 |
push_size += 8;
|
| 717 |
push_size <<= shift;
|
| 718 |
#endif
|
| 719 |
if (shift == 1) { |
| 720 |
if (new_stack) {
|
| 721 |
if (env->eflags & VM_MASK) {
|
| 722 |
PUSHL(ssp, esp, sp_mask, env->segs[R_GS].selector); |
| 723 |
PUSHL(ssp, esp, sp_mask, env->segs[R_FS].selector); |
| 724 |
PUSHL(ssp, esp, sp_mask, env->segs[R_DS].selector); |
| 725 |
PUSHL(ssp, esp, sp_mask, env->segs[R_ES].selector); |
| 726 |
} |
| 727 |
PUSHL(ssp, esp, sp_mask, env->segs[R_SS].selector); |
| 728 |
PUSHL(ssp, esp, sp_mask, ESP); |
| 729 |
} |
| 730 |
PUSHL(ssp, esp, sp_mask, compute_eflags()); |
| 731 |
PUSHL(ssp, esp, sp_mask, env->segs[R_CS].selector); |
| 732 |
PUSHL(ssp, esp, sp_mask, old_eip); |
| 733 |
if (has_error_code) {
|
| 734 |
PUSHL(ssp, esp, sp_mask, error_code); |
| 735 |
} |
| 736 |
} else {
|
| 737 |
if (new_stack) {
|
| 738 |
if (env->eflags & VM_MASK) {
|
| 739 |
PUSHW(ssp, esp, sp_mask, env->segs[R_GS].selector); |
| 740 |
PUSHW(ssp, esp, sp_mask, env->segs[R_FS].selector); |
| 741 |
PUSHW(ssp, esp, sp_mask, env->segs[R_DS].selector); |
| 742 |
PUSHW(ssp, esp, sp_mask, env->segs[R_ES].selector); |
| 743 |
} |
| 744 |
PUSHW(ssp, esp, sp_mask, env->segs[R_SS].selector); |
| 745 |
PUSHW(ssp, esp, sp_mask, ESP); |
| 746 |
} |
| 747 |
PUSHW(ssp, esp, sp_mask, compute_eflags()); |
| 748 |
PUSHW(ssp, esp, sp_mask, env->segs[R_CS].selector); |
| 749 |
PUSHW(ssp, esp, sp_mask, old_eip); |
| 750 |
if (has_error_code) {
|
| 751 |
PUSHW(ssp, esp, sp_mask, error_code); |
| 752 |
} |
| 753 |
} |
| 754 |
|
| 755 |
if (new_stack) {
|
| 756 |
if (env->eflags & VM_MASK) {
|
| 757 |
cpu_x86_load_seg_cache(env, R_ES, 0, NULL, 0, 0); |
| 758 |
cpu_x86_load_seg_cache(env, R_DS, 0, NULL, 0, 0); |
| 759 |
cpu_x86_load_seg_cache(env, R_FS, 0, NULL, 0, 0); |
| 760 |
cpu_x86_load_seg_cache(env, R_GS, 0, NULL, 0, 0); |
| 761 |
} |
| 762 |
ss = (ss & ~3) | dpl;
|
| 763 |
cpu_x86_load_seg_cache(env, R_SS, ss, |
| 764 |
ssp, get_seg_limit(ss_e1, ss_e2), ss_e2); |
| 765 |
} |
| 766 |
ESP = (ESP & ~sp_mask) | (esp & sp_mask); |
| 767 |
|
| 768 |
selector = (selector & ~3) | dpl;
|
| 769 |
cpu_x86_load_seg_cache(env, R_CS, selector, |
| 770 |
get_seg_base(e1, e2), |
| 771 |
get_seg_limit(e1, e2), |
| 772 |
e2); |
| 773 |
cpu_x86_set_cpl(env, dpl); |
| 774 |
env->eip = offset; |
| 775 |
|
| 776 |
/* interrupt gate clear IF mask */
|
| 777 |
if ((type & 1) == 0) { |
| 778 |
env->eflags &= ~IF_MASK; |
| 779 |
} |
| 780 |
env->eflags &= ~(TF_MASK | VM_MASK | RF_MASK | NT_MASK); |
| 781 |
} |
| 782 |
|
| 783 |
/* real mode interrupt */
|
| 784 |
static void do_interrupt_real(int intno, int is_int, int error_code, |
| 785 |
unsigned int next_eip) |
| 786 |
{
|
| 787 |
SegmentCache *dt; |
| 788 |
uint8_t *ptr, *ssp; |
| 789 |
int selector;
|
| 790 |
uint32_t offset, esp; |
| 791 |
uint32_t old_cs, old_eip; |
| 792 |
|
| 793 |
/* real mode (simpler !) */
|
| 794 |
dt = &env->idt; |
| 795 |
if (intno * 4 + 3 > dt->limit) |
| 796 |
raise_exception_err(EXCP0D_GPF, intno * 8 + 2); |
| 797 |
ptr = dt->base + intno * 4;
|
| 798 |
offset = lduw_kernel(ptr); |
| 799 |
selector = lduw_kernel(ptr + 2);
|
| 800 |
esp = ESP; |
| 801 |
ssp = env->segs[R_SS].base; |
| 802 |
if (is_int)
|
| 803 |
old_eip = next_eip; |
| 804 |
else
|
| 805 |
old_eip = env->eip; |
| 806 |
old_cs = env->segs[R_CS].selector; |
| 807 |
/* XXX: use SS segment size ? */
|
| 808 |
PUSHW(ssp, esp, 0xffff, compute_eflags());
|
| 809 |
PUSHW(ssp, esp, 0xffff, old_cs);
|
| 810 |
PUSHW(ssp, esp, 0xffff, old_eip);
|
| 811 |
|
| 812 |
/* update processor state */
|
| 813 |
ESP = (ESP & ~0xffff) | (esp & 0xffff); |
| 814 |
env->eip = offset; |
| 815 |
env->segs[R_CS].selector = selector; |
| 816 |
env->segs[R_CS].base = (uint8_t *)(selector << 4);
|
| 817 |
env->eflags &= ~(IF_MASK | TF_MASK | AC_MASK | RF_MASK); |
| 818 |
} |
| 819 |
|
| 820 |
/* fake user mode interrupt */
|
| 821 |
void do_interrupt_user(int intno, int is_int, int error_code, |
| 822 |
unsigned int next_eip) |
| 823 |
{
|
| 824 |
SegmentCache *dt; |
| 825 |
uint8_t *ptr; |
| 826 |
int dpl, cpl;
|
| 827 |
uint32_t e2; |
| 828 |
|
| 829 |
dt = &env->idt; |
| 830 |
ptr = dt->base + (intno * 8);
|
| 831 |
e2 = ldl_kernel(ptr + 4);
|
| 832 |
|
| 833 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 834 |
cpl = env->hflags & HF_CPL_MASK; |
| 835 |
/* check privledge if software int */
|
| 836 |
if (is_int && dpl < cpl)
|
| 837 |
raise_exception_err(EXCP0D_GPF, intno * 8 + 2); |
| 838 |
|
| 839 |
/* Since we emulate only user space, we cannot do more than
|
| 840 |
exiting the emulation with the suitable exception and error
|
| 841 |
code */
|
| 842 |
if (is_int)
|
| 843 |
EIP = next_eip; |
| 844 |
} |
| 845 |
|
| 846 |
/*
|
| 847 |
* Begin execution of an interruption. is_int is TRUE if coming from
|
| 848 |
* the int instruction. next_eip is the EIP value AFTER the interrupt
|
| 849 |
* instruction. It is only relevant if is_int is TRUE.
|
| 850 |
*/
|
| 851 |
void do_interrupt(int intno, int is_int, int error_code, |
| 852 |
unsigned int next_eip, int is_hw) |
| 853 |
{
|
| 854 |
#ifdef DEBUG_PCALL
|
| 855 |
if (loglevel & (CPU_LOG_PCALL | CPU_LOG_INT)) {
|
| 856 |
if ((env->cr[0] & CR0_PE_MASK)) { |
| 857 |
static int count; |
| 858 |
fprintf(logfile, "%6d: v=%02x e=%04x i=%d cpl=%d IP=%04x:%08x pc=%08x SP=%04x:%08x",
|
| 859 |
count, intno, error_code, is_int, |
| 860 |
env->hflags & HF_CPL_MASK, |
| 861 |
env->segs[R_CS].selector, EIP, |
| 862 |
(int)env->segs[R_CS].base + EIP,
|
| 863 |
env->segs[R_SS].selector, ESP); |
| 864 |
if (intno == 0x0e) { |
| 865 |
fprintf(logfile, " CR2=%08x", env->cr[2]); |
| 866 |
} else {
|
| 867 |
fprintf(logfile, " EAX=%08x", EAX);
|
| 868 |
} |
| 869 |
fprintf(logfile, "\n");
|
| 870 |
#if 0
|
| 871 |
cpu_dump_state(env, logfile, fprintf, X86_DUMP_CCOP);
|
| 872 |
{
|
| 873 |
int i;
|
| 874 |
uint8_t *ptr;
|
| 875 |
fprintf(logfile, " code=");
|
| 876 |
ptr = env->segs[R_CS].base + env->eip;
|
| 877 |
for(i = 0; i < 16; i++) {
|
| 878 |
fprintf(logfile, " %02x", ldub(ptr + i));
|
| 879 |
}
|
| 880 |
fprintf(logfile, "\n");
|
| 881 |
}
|
| 882 |
#endif
|
| 883 |
count++; |
| 884 |
} |
| 885 |
} |
| 886 |
#endif
|
| 887 |
if (env->cr[0] & CR0_PE_MASK) { |
| 888 |
do_interrupt_protected(intno, is_int, error_code, next_eip, is_hw); |
| 889 |
} else {
|
| 890 |
do_interrupt_real(intno, is_int, error_code, next_eip); |
| 891 |
} |
| 892 |
} |
| 893 |
|
| 894 |
/*
|
| 895 |
* Signal an interruption. It is executed in the main CPU loop.
|
| 896 |
* is_int is TRUE if coming from the int instruction. next_eip is the
|
| 897 |
* EIP value AFTER the interrupt instruction. It is only relevant if
|
| 898 |
* is_int is TRUE.
|
| 899 |
*/
|
| 900 |
void raise_interrupt(int intno, int is_int, int error_code, |
| 901 |
unsigned int next_eip) |
| 902 |
{
|
| 903 |
env->exception_index = intno; |
| 904 |
env->error_code = error_code; |
| 905 |
env->exception_is_int = is_int; |
| 906 |
env->exception_next_eip = next_eip; |
| 907 |
cpu_loop_exit(); |
| 908 |
} |
| 909 |
|
| 910 |
/* same as raise_exception_err, but do not restore global registers */
|
| 911 |
static void raise_exception_err_norestore(int exception_index, int error_code) |
| 912 |
{
|
| 913 |
env->exception_index = exception_index; |
| 914 |
env->error_code = error_code; |
| 915 |
env->exception_is_int = 0;
|
| 916 |
env->exception_next_eip = 0;
|
| 917 |
longjmp(env->jmp_env, 1);
|
| 918 |
} |
| 919 |
|
| 920 |
/* shortcuts to generate exceptions */
|
| 921 |
|
| 922 |
void (raise_exception_err)(int exception_index, int error_code) |
| 923 |
{
|
| 924 |
raise_interrupt(exception_index, 0, error_code, 0); |
| 925 |
} |
| 926 |
|
| 927 |
void raise_exception(int exception_index) |
| 928 |
{
|
| 929 |
raise_interrupt(exception_index, 0, 0, 0); |
| 930 |
} |
| 931 |
|
| 932 |
#ifdef BUGGY_GCC_DIV64
|
| 933 |
/* gcc 2.95.4 on PowerPC does not seem to like using __udivdi3, so we
|
| 934 |
call it from another function */
|
| 935 |
uint32_t div64(uint32_t *q_ptr, uint64_t num, uint32_t den) |
| 936 |
{
|
| 937 |
*q_ptr = num / den; |
| 938 |
return num % den;
|
| 939 |
} |
| 940 |
|
| 941 |
int32_t idiv64(int32_t *q_ptr, int64_t num, int32_t den) |
| 942 |
{
|
| 943 |
*q_ptr = num / den; |
| 944 |
return num % den;
|
| 945 |
} |
| 946 |
#endif
|
| 947 |
|
| 948 |
void helper_divl_EAX_T0(uint32_t eip)
|
| 949 |
{
|
| 950 |
unsigned int den, q, r; |
| 951 |
uint64_t num; |
| 952 |
|
| 953 |
num = EAX | ((uint64_t)EDX << 32);
|
| 954 |
den = T0; |
| 955 |
if (den == 0) { |
| 956 |
EIP = eip; |
| 957 |
raise_exception(EXCP00_DIVZ); |
| 958 |
} |
| 959 |
#ifdef BUGGY_GCC_DIV64
|
| 960 |
r = div64(&q, num, den); |
| 961 |
#else
|
| 962 |
q = (num / den); |
| 963 |
r = (num % den); |
| 964 |
#endif
|
| 965 |
EAX = q; |
| 966 |
EDX = r; |
| 967 |
} |
| 968 |
|
| 969 |
void helper_idivl_EAX_T0(uint32_t eip)
|
| 970 |
{
|
| 971 |
int den, q, r;
|
| 972 |
int64_t num; |
| 973 |
|
| 974 |
num = EAX | ((uint64_t)EDX << 32);
|
| 975 |
den = T0; |
| 976 |
if (den == 0) { |
| 977 |
EIP = eip; |
| 978 |
raise_exception(EXCP00_DIVZ); |
| 979 |
} |
| 980 |
#ifdef BUGGY_GCC_DIV64
|
| 981 |
r = idiv64(&q, num, den); |
| 982 |
#else
|
| 983 |
q = (num / den); |
| 984 |
r = (num % den); |
| 985 |
#endif
|
| 986 |
EAX = q; |
| 987 |
EDX = r; |
| 988 |
} |
| 989 |
|
| 990 |
void helper_cmpxchg8b(void) |
| 991 |
{
|
| 992 |
uint64_t d; |
| 993 |
int eflags;
|
| 994 |
|
| 995 |
eflags = cc_table[CC_OP].compute_all(); |
| 996 |
d = ldq((uint8_t *)A0); |
| 997 |
if (d == (((uint64_t)EDX << 32) | EAX)) { |
| 998 |
stq((uint8_t *)A0, ((uint64_t)ECX << 32) | EBX);
|
| 999 |
eflags |= CC_Z; |
| 1000 |
} else {
|
| 1001 |
EDX = d >> 32;
|
| 1002 |
EAX = d; |
| 1003 |
eflags &= ~CC_Z; |
| 1004 |
} |
| 1005 |
CC_SRC = eflags; |
| 1006 |
} |
| 1007 |
|
| 1008 |
#define CPUID_FP87 (1 << 0) |
| 1009 |
#define CPUID_VME (1 << 1) |
| 1010 |
#define CPUID_DE (1 << 2) |
| 1011 |
#define CPUID_PSE (1 << 3) |
| 1012 |
#define CPUID_TSC (1 << 4) |
| 1013 |
#define CPUID_MSR (1 << 5) |
| 1014 |
#define CPUID_PAE (1 << 6) |
| 1015 |
#define CPUID_MCE (1 << 7) |
| 1016 |
#define CPUID_CX8 (1 << 8) |
| 1017 |
#define CPUID_APIC (1 << 9) |
| 1018 |
#define CPUID_SEP (1 << 11) /* sysenter/sysexit */ |
| 1019 |
#define CPUID_MTRR (1 << 12) |
| 1020 |
#define CPUID_PGE (1 << 13) |
| 1021 |
#define CPUID_MCA (1 << 14) |
| 1022 |
#define CPUID_CMOV (1 << 15) |
| 1023 |
/* ... */
|
| 1024 |
#define CPUID_MMX (1 << 23) |
| 1025 |
#define CPUID_FXSR (1 << 24) |
| 1026 |
#define CPUID_SSE (1 << 25) |
| 1027 |
#define CPUID_SSE2 (1 << 26) |
| 1028 |
|
| 1029 |
void helper_cpuid(void) |
| 1030 |
{
|
| 1031 |
switch(EAX) {
|
| 1032 |
case 0: |
| 1033 |
EAX = 2; /* max EAX index supported */ |
| 1034 |
EBX = 0x756e6547;
|
| 1035 |
ECX = 0x6c65746e;
|
| 1036 |
EDX = 0x49656e69;
|
| 1037 |
break;
|
| 1038 |
case 1: |
| 1039 |
{
|
| 1040 |
int family, model, stepping;
|
| 1041 |
/* EAX = 1 info */
|
| 1042 |
#if 0
|
| 1043 |
/* pentium 75-200 */
|
| 1044 |
family = 5;
|
| 1045 |
model = 2;
|
| 1046 |
stepping = 11;
|
| 1047 |
#else
|
| 1048 |
/* pentium pro */
|
| 1049 |
family = 6;
|
| 1050 |
model = 1;
|
| 1051 |
stepping = 3;
|
| 1052 |
#endif
|
| 1053 |
EAX = (family << 8) | (model << 4) | stepping; |
| 1054 |
EBX = 0;
|
| 1055 |
ECX = 0;
|
| 1056 |
EDX = CPUID_FP87 | CPUID_DE | CPUID_PSE | |
| 1057 |
CPUID_TSC | CPUID_MSR | CPUID_MCE | |
| 1058 |
CPUID_CX8 | CPUID_PGE | CPUID_CMOV; |
| 1059 |
} |
| 1060 |
break;
|
| 1061 |
default:
|
| 1062 |
/* cache info: needed for Pentium Pro compatibility */
|
| 1063 |
EAX = 0x410601;
|
| 1064 |
EBX = 0;
|
| 1065 |
ECX = 0;
|
| 1066 |
EDX = 0;
|
| 1067 |
break;
|
| 1068 |
} |
| 1069 |
} |
| 1070 |
|
| 1071 |
void helper_enter_level(int level, int data32) |
| 1072 |
{
|
| 1073 |
uint8_t *ssp; |
| 1074 |
uint32_t esp_mask, esp, ebp; |
| 1075 |
|
| 1076 |
esp_mask = get_sp_mask(env->segs[R_SS].flags); |
| 1077 |
ssp = env->segs[R_SS].base; |
| 1078 |
ebp = EBP; |
| 1079 |
esp = ESP; |
| 1080 |
if (data32) {
|
| 1081 |
/* 32 bit */
|
| 1082 |
esp -= 4;
|
| 1083 |
while (--level) {
|
| 1084 |
esp -= 4;
|
| 1085 |
ebp -= 4;
|
| 1086 |
stl(ssp + (esp & esp_mask), ldl(ssp + (ebp & esp_mask))); |
| 1087 |
} |
| 1088 |
esp -= 4;
|
| 1089 |
stl(ssp + (esp & esp_mask), T1); |
| 1090 |
} else {
|
| 1091 |
/* 16 bit */
|
| 1092 |
esp -= 2;
|
| 1093 |
while (--level) {
|
| 1094 |
esp -= 2;
|
| 1095 |
ebp -= 2;
|
| 1096 |
stw(ssp + (esp & esp_mask), lduw(ssp + (ebp & esp_mask))); |
| 1097 |
} |
| 1098 |
esp -= 2;
|
| 1099 |
stw(ssp + (esp & esp_mask), T1); |
| 1100 |
} |
| 1101 |
} |
| 1102 |
|
| 1103 |
void helper_lldt_T0(void) |
| 1104 |
{
|
| 1105 |
int selector;
|
| 1106 |
SegmentCache *dt; |
| 1107 |
uint32_t e1, e2; |
| 1108 |
int index;
|
| 1109 |
uint8_t *ptr; |
| 1110 |
|
| 1111 |
selector = T0 & 0xffff;
|
| 1112 |
if ((selector & 0xfffc) == 0) { |
| 1113 |
/* XXX: NULL selector case: invalid LDT */
|
| 1114 |
env->ldt.base = NULL;
|
| 1115 |
env->ldt.limit = 0;
|
| 1116 |
} else {
|
| 1117 |
if (selector & 0x4) |
| 1118 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 1119 |
dt = &env->gdt; |
| 1120 |
index = selector & ~7;
|
| 1121 |
if ((index + 7) > dt->limit) |
| 1122 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 1123 |
ptr = dt->base + index; |
| 1124 |
e1 = ldl_kernel(ptr); |
| 1125 |
e2 = ldl_kernel(ptr + 4);
|
| 1126 |
if ((e2 & DESC_S_MASK) || ((e2 >> DESC_TYPE_SHIFT) & 0xf) != 2) |
| 1127 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 1128 |
if (!(e2 & DESC_P_MASK))
|
| 1129 |
raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc);
|
| 1130 |
load_seg_cache_raw_dt(&env->ldt, e1, e2); |
| 1131 |
} |
| 1132 |
env->ldt.selector = selector; |
| 1133 |
} |
| 1134 |
|
| 1135 |
void helper_ltr_T0(void) |
| 1136 |
{
|
| 1137 |
int selector;
|
| 1138 |
SegmentCache *dt; |
| 1139 |
uint32_t e1, e2; |
| 1140 |
int index, type;
|
| 1141 |
uint8_t *ptr; |
| 1142 |
|
| 1143 |
selector = T0 & 0xffff;
|
| 1144 |
if ((selector & 0xfffc) == 0) { |
| 1145 |
/* NULL selector case: invalid LDT */
|
| 1146 |
env->tr.base = NULL;
|
| 1147 |
env->tr.limit = 0;
|
| 1148 |
env->tr.flags = 0;
|
| 1149 |
} else {
|
| 1150 |
if (selector & 0x4) |
| 1151 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 1152 |
dt = &env->gdt; |
| 1153 |
index = selector & ~7;
|
| 1154 |
if ((index + 7) > dt->limit) |
| 1155 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 1156 |
ptr = dt->base + index; |
| 1157 |
e1 = ldl_kernel(ptr); |
| 1158 |
e2 = ldl_kernel(ptr + 4);
|
| 1159 |
type = (e2 >> DESC_TYPE_SHIFT) & 0xf;
|
| 1160 |
if ((e2 & DESC_S_MASK) ||
|
| 1161 |
(type != 1 && type != 9)) |
| 1162 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 1163 |
if (!(e2 & DESC_P_MASK))
|
| 1164 |
raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc);
|
| 1165 |
load_seg_cache_raw_dt(&env->tr, e1, e2); |
| 1166 |
e2 |= DESC_TSS_BUSY_MASK; |
| 1167 |
stl_kernel(ptr + 4, e2);
|
| 1168 |
} |
| 1169 |
env->tr.selector = selector; |
| 1170 |
} |
| 1171 |
|
| 1172 |
/* only works if protected mode and not VM86. seg_reg must be != R_CS */
|
| 1173 |
void load_seg(int seg_reg, int selector) |
| 1174 |
{
|
| 1175 |
uint32_t e1, e2; |
| 1176 |
int cpl, dpl, rpl;
|
| 1177 |
SegmentCache *dt; |
| 1178 |
int index;
|
| 1179 |
uint8_t *ptr; |
| 1180 |
|
| 1181 |
selector &= 0xffff;
|
| 1182 |
if ((selector & 0xfffc) == 0) { |
| 1183 |
/* null selector case */
|
| 1184 |
if (seg_reg == R_SS)
|
| 1185 |
raise_exception_err(EXCP0D_GPF, 0);
|
| 1186 |
cpu_x86_load_seg_cache(env, seg_reg, selector, NULL, 0, 0); |
| 1187 |
} else {
|
| 1188 |
|
| 1189 |
if (selector & 0x4) |
| 1190 |
dt = &env->ldt; |
| 1191 |
else
|
| 1192 |
dt = &env->gdt; |
| 1193 |
index = selector & ~7;
|
| 1194 |
if ((index + 7) > dt->limit) |
| 1195 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 1196 |
ptr = dt->base + index; |
| 1197 |
e1 = ldl_kernel(ptr); |
| 1198 |
e2 = ldl_kernel(ptr + 4);
|
| 1199 |
|
| 1200 |
if (!(e2 & DESC_S_MASK))
|
| 1201 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 1202 |
rpl = selector & 3;
|
| 1203 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 1204 |
cpl = env->hflags & HF_CPL_MASK; |
| 1205 |
if (seg_reg == R_SS) {
|
| 1206 |
/* must be writable segment */
|
| 1207 |
if ((e2 & DESC_CS_MASK) || !(e2 & DESC_W_MASK))
|
| 1208 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 1209 |
if (rpl != cpl || dpl != cpl)
|
| 1210 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 1211 |
} else {
|
| 1212 |
/* must be readable segment */
|
| 1213 |
if ((e2 & (DESC_CS_MASK | DESC_R_MASK)) == DESC_CS_MASK)
|
| 1214 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 1215 |
|
| 1216 |
if (!(e2 & DESC_CS_MASK) || !(e2 & DESC_C_MASK)) {
|
| 1217 |
/* if not conforming code, test rights */
|
| 1218 |
if (dpl < cpl || dpl < rpl)
|
| 1219 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 1220 |
} |
| 1221 |
} |
| 1222 |
|
| 1223 |
if (!(e2 & DESC_P_MASK)) {
|
| 1224 |
if (seg_reg == R_SS)
|
| 1225 |
raise_exception_err(EXCP0C_STACK, selector & 0xfffc);
|
| 1226 |
else
|
| 1227 |
raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc);
|
| 1228 |
} |
| 1229 |
|
| 1230 |
/* set the access bit if not already set */
|
| 1231 |
if (!(e2 & DESC_A_MASK)) {
|
| 1232 |
e2 |= DESC_A_MASK; |
| 1233 |
stl_kernel(ptr + 4, e2);
|
| 1234 |
} |
| 1235 |
|
| 1236 |
cpu_x86_load_seg_cache(env, seg_reg, selector, |
| 1237 |
get_seg_base(e1, e2), |
| 1238 |
get_seg_limit(e1, e2), |
| 1239 |
e2); |
| 1240 |
#if 0
|
| 1241 |
fprintf(logfile, "load_seg: sel=0x%04x base=0x%08lx limit=0x%08lx flags=%08x\n",
|
| 1242 |
selector, (unsigned long)sc->base, sc->limit, sc->flags);
|
| 1243 |
#endif
|
| 1244 |
} |
| 1245 |
} |
| 1246 |
|
| 1247 |
/* protected mode jump */
|
| 1248 |
void helper_ljmp_protected_T0_T1(int next_eip) |
| 1249 |
{
|
| 1250 |
int new_cs, new_eip, gate_cs, type;
|
| 1251 |
uint32_t e1, e2, cpl, dpl, rpl, limit; |
| 1252 |
|
| 1253 |
new_cs = T0; |
| 1254 |
new_eip = T1; |
| 1255 |
if ((new_cs & 0xfffc) == 0) |
| 1256 |
raise_exception_err(EXCP0D_GPF, 0);
|
| 1257 |
if (load_segment(&e1, &e2, new_cs) != 0) |
| 1258 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1259 |
cpl = env->hflags & HF_CPL_MASK; |
| 1260 |
if (e2 & DESC_S_MASK) {
|
| 1261 |
if (!(e2 & DESC_CS_MASK))
|
| 1262 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1263 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 1264 |
if (e2 & DESC_C_MASK) {
|
| 1265 |
/* conforming code segment */
|
| 1266 |
if (dpl > cpl)
|
| 1267 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1268 |
} else {
|
| 1269 |
/* non conforming code segment */
|
| 1270 |
rpl = new_cs & 3;
|
| 1271 |
if (rpl > cpl)
|
| 1272 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1273 |
if (dpl != cpl)
|
| 1274 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1275 |
} |
| 1276 |
if (!(e2 & DESC_P_MASK))
|
| 1277 |
raise_exception_err(EXCP0B_NOSEG, new_cs & 0xfffc);
|
| 1278 |
limit = get_seg_limit(e1, e2); |
| 1279 |
if (new_eip > limit)
|
| 1280 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1281 |
cpu_x86_load_seg_cache(env, R_CS, (new_cs & 0xfffc) | cpl,
|
| 1282 |
get_seg_base(e1, e2), limit, e2); |
| 1283 |
EIP = new_eip; |
| 1284 |
} else {
|
| 1285 |
/* jump to call or task gate */
|
| 1286 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 1287 |
rpl = new_cs & 3;
|
| 1288 |
cpl = env->hflags & HF_CPL_MASK; |
| 1289 |
type = (e2 >> DESC_TYPE_SHIFT) & 0xf;
|
| 1290 |
switch(type) {
|
| 1291 |
case 1: /* 286 TSS */ |
| 1292 |
case 9: /* 386 TSS */ |
| 1293 |
case 5: /* task gate */ |
| 1294 |
if (dpl < cpl || dpl < rpl)
|
| 1295 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1296 |
switch_tss(new_cs, e1, e2, SWITCH_TSS_JMP, next_eip); |
| 1297 |
break;
|
| 1298 |
case 4: /* 286 call gate */ |
| 1299 |
case 12: /* 386 call gate */ |
| 1300 |
if ((dpl < cpl) || (dpl < rpl))
|
| 1301 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1302 |
if (!(e2 & DESC_P_MASK))
|
| 1303 |
raise_exception_err(EXCP0B_NOSEG, new_cs & 0xfffc);
|
| 1304 |
gate_cs = e1 >> 16;
|
| 1305 |
new_eip = (e1 & 0xffff);
|
| 1306 |
if (type == 12) |
| 1307 |
new_eip |= (e2 & 0xffff0000);
|
| 1308 |
if (load_segment(&e1, &e2, gate_cs) != 0) |
| 1309 |
raise_exception_err(EXCP0D_GPF, gate_cs & 0xfffc);
|
| 1310 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 1311 |
/* must be code segment */
|
| 1312 |
if (((e2 & (DESC_S_MASK | DESC_CS_MASK)) !=
|
| 1313 |
(DESC_S_MASK | DESC_CS_MASK))) |
| 1314 |
raise_exception_err(EXCP0D_GPF, gate_cs & 0xfffc);
|
| 1315 |
if (((e2 & DESC_C_MASK) && (dpl > cpl)) ||
|
| 1316 |
(!(e2 & DESC_C_MASK) && (dpl != cpl))) |
| 1317 |
raise_exception_err(EXCP0D_GPF, gate_cs & 0xfffc);
|
| 1318 |
if (!(e2 & DESC_P_MASK))
|
| 1319 |
raise_exception_err(EXCP0D_GPF, gate_cs & 0xfffc);
|
| 1320 |
limit = get_seg_limit(e1, e2); |
| 1321 |
if (new_eip > limit)
|
| 1322 |
raise_exception_err(EXCP0D_GPF, 0);
|
| 1323 |
cpu_x86_load_seg_cache(env, R_CS, (gate_cs & 0xfffc) | cpl,
|
| 1324 |
get_seg_base(e1, e2), limit, e2); |
| 1325 |
EIP = new_eip; |
| 1326 |
break;
|
| 1327 |
default:
|
| 1328 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1329 |
break;
|
| 1330 |
} |
| 1331 |
} |
| 1332 |
} |
| 1333 |
|
| 1334 |
/* real mode call */
|
| 1335 |
void helper_lcall_real_T0_T1(int shift, int next_eip) |
| 1336 |
{
|
| 1337 |
int new_cs, new_eip;
|
| 1338 |
uint32_t esp, esp_mask; |
| 1339 |
uint8_t *ssp; |
| 1340 |
|
| 1341 |
new_cs = T0; |
| 1342 |
new_eip = T1; |
| 1343 |
esp = ESP; |
| 1344 |
esp_mask = get_sp_mask(env->segs[R_SS].flags); |
| 1345 |
ssp = env->segs[R_SS].base; |
| 1346 |
if (shift) {
|
| 1347 |
PUSHL(ssp, esp, esp_mask, env->segs[R_CS].selector); |
| 1348 |
PUSHL(ssp, esp, esp_mask, next_eip); |
| 1349 |
} else {
|
| 1350 |
PUSHW(ssp, esp, esp_mask, env->segs[R_CS].selector); |
| 1351 |
PUSHW(ssp, esp, esp_mask, next_eip); |
| 1352 |
} |
| 1353 |
|
| 1354 |
ESP = (ESP & ~esp_mask) | (esp & esp_mask); |
| 1355 |
env->eip = new_eip; |
| 1356 |
env->segs[R_CS].selector = new_cs; |
| 1357 |
env->segs[R_CS].base = (uint8_t *)(new_cs << 4);
|
| 1358 |
} |
| 1359 |
|
| 1360 |
/* protected mode call */
|
| 1361 |
void helper_lcall_protected_T0_T1(int shift, int next_eip) |
| 1362 |
{
|
| 1363 |
int new_cs, new_eip, new_stack, i;
|
| 1364 |
uint32_t e1, e2, cpl, dpl, rpl, selector, offset, param_count; |
| 1365 |
uint32_t ss, ss_e1, ss_e2, sp, type, ss_dpl, sp_mask; |
| 1366 |
uint32_t val, limit, old_sp_mask; |
| 1367 |
uint8_t *ssp, *old_ssp; |
| 1368 |
|
| 1369 |
new_cs = T0; |
| 1370 |
new_eip = T1; |
| 1371 |
#ifdef DEBUG_PCALL
|
| 1372 |
if (loglevel & CPU_LOG_PCALL) {
|
| 1373 |
fprintf(logfile, "lcall %04x:%08x s=%d\n",
|
| 1374 |
new_cs, new_eip, shift); |
| 1375 |
cpu_dump_state(env, logfile, fprintf, X86_DUMP_CCOP); |
| 1376 |
} |
| 1377 |
#endif
|
| 1378 |
if ((new_cs & 0xfffc) == 0) |
| 1379 |
raise_exception_err(EXCP0D_GPF, 0);
|
| 1380 |
if (load_segment(&e1, &e2, new_cs) != 0) |
| 1381 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1382 |
cpl = env->hflags & HF_CPL_MASK; |
| 1383 |
#ifdef DEBUG_PCALL
|
| 1384 |
if (loglevel & CPU_LOG_PCALL) {
|
| 1385 |
fprintf(logfile, "desc=%08x:%08x\n", e1, e2);
|
| 1386 |
} |
| 1387 |
#endif
|
| 1388 |
if (e2 & DESC_S_MASK) {
|
| 1389 |
if (!(e2 & DESC_CS_MASK))
|
| 1390 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1391 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 1392 |
if (e2 & DESC_C_MASK) {
|
| 1393 |
/* conforming code segment */
|
| 1394 |
if (dpl > cpl)
|
| 1395 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1396 |
} else {
|
| 1397 |
/* non conforming code segment */
|
| 1398 |
rpl = new_cs & 3;
|
| 1399 |
if (rpl > cpl)
|
| 1400 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1401 |
if (dpl != cpl)
|
| 1402 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1403 |
} |
| 1404 |
if (!(e2 & DESC_P_MASK))
|
| 1405 |
raise_exception_err(EXCP0B_NOSEG, new_cs & 0xfffc);
|
| 1406 |
|
| 1407 |
sp = ESP; |
| 1408 |
sp_mask = get_sp_mask(env->segs[R_SS].flags); |
| 1409 |
ssp = env->segs[R_SS].base; |
| 1410 |
if (shift) {
|
| 1411 |
PUSHL(ssp, sp, sp_mask, env->segs[R_CS].selector); |
| 1412 |
PUSHL(ssp, sp, sp_mask, next_eip); |
| 1413 |
} else {
|
| 1414 |
PUSHW(ssp, sp, sp_mask, env->segs[R_CS].selector); |
| 1415 |
PUSHW(ssp, sp, sp_mask, next_eip); |
| 1416 |
} |
| 1417 |
|
| 1418 |
limit = get_seg_limit(e1, e2); |
| 1419 |
if (new_eip > limit)
|
| 1420 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1421 |
/* from this point, not restartable */
|
| 1422 |
ESP = (ESP & ~sp_mask) | (sp & sp_mask); |
| 1423 |
cpu_x86_load_seg_cache(env, R_CS, (new_cs & 0xfffc) | cpl,
|
| 1424 |
get_seg_base(e1, e2), limit, e2); |
| 1425 |
EIP = new_eip; |
| 1426 |
} else {
|
| 1427 |
/* check gate type */
|
| 1428 |
type = (e2 >> DESC_TYPE_SHIFT) & 0x1f;
|
| 1429 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 1430 |
rpl = new_cs & 3;
|
| 1431 |
switch(type) {
|
| 1432 |
case 1: /* available 286 TSS */ |
| 1433 |
case 9: /* available 386 TSS */ |
| 1434 |
case 5: /* task gate */ |
| 1435 |
if (dpl < cpl || dpl < rpl)
|
| 1436 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1437 |
switch_tss(new_cs, e1, e2, SWITCH_TSS_CALL, next_eip); |
| 1438 |
return;
|
| 1439 |
case 4: /* 286 call gate */ |
| 1440 |
case 12: /* 386 call gate */ |
| 1441 |
break;
|
| 1442 |
default:
|
| 1443 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1444 |
break;
|
| 1445 |
} |
| 1446 |
shift = type >> 3;
|
| 1447 |
|
| 1448 |
if (dpl < cpl || dpl < rpl)
|
| 1449 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1450 |
/* check valid bit */
|
| 1451 |
if (!(e2 & DESC_P_MASK))
|
| 1452 |
raise_exception_err(EXCP0B_NOSEG, new_cs & 0xfffc);
|
| 1453 |
selector = e1 >> 16;
|
| 1454 |
offset = (e2 & 0xffff0000) | (e1 & 0x0000ffff); |
| 1455 |
param_count = e2 & 0x1f;
|
| 1456 |
if ((selector & 0xfffc) == 0) |
| 1457 |
raise_exception_err(EXCP0D_GPF, 0);
|
| 1458 |
|
| 1459 |
if (load_segment(&e1, &e2, selector) != 0) |
| 1460 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 1461 |
if (!(e2 & DESC_S_MASK) || !(e2 & (DESC_CS_MASK)))
|
| 1462 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 1463 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 1464 |
if (dpl > cpl)
|
| 1465 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 1466 |
if (!(e2 & DESC_P_MASK))
|
| 1467 |
raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc);
|
| 1468 |
|
| 1469 |
if (!(e2 & DESC_C_MASK) && dpl < cpl) {
|
| 1470 |
/* to inner priviledge */
|
| 1471 |
get_ss_esp_from_tss(&ss, &sp, dpl); |
| 1472 |
#ifdef DEBUG_PCALL
|
| 1473 |
if (loglevel & CPU_LOG_PCALL)
|
| 1474 |
fprintf(logfile, "new ss:esp=%04x:%08x param_count=%d ESP=%x\n",
|
| 1475 |
ss, sp, param_count, ESP); |
| 1476 |
#endif
|
| 1477 |
if ((ss & 0xfffc) == 0) |
| 1478 |
raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
| 1479 |
if ((ss & 3) != dpl) |
| 1480 |
raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
| 1481 |
if (load_segment(&ss_e1, &ss_e2, ss) != 0) |
| 1482 |
raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
| 1483 |
ss_dpl = (ss_e2 >> DESC_DPL_SHIFT) & 3;
|
| 1484 |
if (ss_dpl != dpl)
|
| 1485 |
raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
| 1486 |
if (!(ss_e2 & DESC_S_MASK) ||
|
| 1487 |
(ss_e2 & DESC_CS_MASK) || |
| 1488 |
!(ss_e2 & DESC_W_MASK)) |
| 1489 |
raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
| 1490 |
if (!(ss_e2 & DESC_P_MASK))
|
| 1491 |
raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
| 1492 |
|
| 1493 |
// push_size = ((param_count * 2) + 8) << shift;
|
| 1494 |
|
| 1495 |
old_sp_mask = get_sp_mask(env->segs[R_SS].flags); |
| 1496 |
old_ssp = env->segs[R_SS].base; |
| 1497 |
|
| 1498 |
sp_mask = get_sp_mask(ss_e2); |
| 1499 |
ssp = get_seg_base(ss_e1, ss_e2); |
| 1500 |
if (shift) {
|
| 1501 |
PUSHL(ssp, sp, sp_mask, env->segs[R_SS].selector); |
| 1502 |
PUSHL(ssp, sp, sp_mask, ESP); |
| 1503 |
for(i = param_count - 1; i >= 0; i--) { |
| 1504 |
val = ldl_kernel(old_ssp + ((ESP + i * 4) & old_sp_mask));
|
| 1505 |
PUSHL(ssp, sp, sp_mask, val); |
| 1506 |
} |
| 1507 |
} else {
|
| 1508 |
PUSHW(ssp, sp, sp_mask, env->segs[R_SS].selector); |
| 1509 |
PUSHW(ssp, sp, sp_mask, ESP); |
| 1510 |
for(i = param_count - 1; i >= 0; i--) { |
| 1511 |
val = lduw_kernel(old_ssp + ((ESP + i * 2) & old_sp_mask));
|
| 1512 |
PUSHW(ssp, sp, sp_mask, val); |
| 1513 |
} |
| 1514 |
} |
| 1515 |
new_stack = 1;
|
| 1516 |
} else {
|
| 1517 |
/* to same priviledge */
|
| 1518 |
sp = ESP; |
| 1519 |
sp_mask = get_sp_mask(env->segs[R_SS].flags); |
| 1520 |
ssp = env->segs[R_SS].base; |
| 1521 |
// push_size = (4 << shift);
|
| 1522 |
new_stack = 0;
|
| 1523 |
} |
| 1524 |
|
| 1525 |
if (shift) {
|
| 1526 |
PUSHL(ssp, sp, sp_mask, env->segs[R_CS].selector); |
| 1527 |
PUSHL(ssp, sp, sp_mask, next_eip); |
| 1528 |
} else {
|
| 1529 |
PUSHW(ssp, sp, sp_mask, env->segs[R_CS].selector); |
| 1530 |
PUSHW(ssp, sp, sp_mask, next_eip); |
| 1531 |
} |
| 1532 |
|
| 1533 |
/* from this point, not restartable */
|
| 1534 |
|
| 1535 |
if (new_stack) {
|
| 1536 |
ss = (ss & ~3) | dpl;
|
| 1537 |
cpu_x86_load_seg_cache(env, R_SS, ss, |
| 1538 |
ssp, |
| 1539 |
get_seg_limit(ss_e1, ss_e2), |
| 1540 |
ss_e2); |
| 1541 |
} |
| 1542 |
|
| 1543 |
selector = (selector & ~3) | dpl;
|
| 1544 |
cpu_x86_load_seg_cache(env, R_CS, selector, |
| 1545 |
get_seg_base(e1, e2), |
| 1546 |
get_seg_limit(e1, e2), |
| 1547 |
e2); |
| 1548 |
cpu_x86_set_cpl(env, dpl); |
| 1549 |
ESP = (ESP & ~sp_mask) | (sp & sp_mask); |
| 1550 |
EIP = offset; |
| 1551 |
} |
| 1552 |
} |
| 1553 |
|
| 1554 |
/* real and vm86 mode iret */
|
| 1555 |
void helper_iret_real(int shift) |
| 1556 |
{
|
| 1557 |
uint32_t sp, new_cs, new_eip, new_eflags, sp_mask; |
| 1558 |
uint8_t *ssp; |
| 1559 |
int eflags_mask;
|
| 1560 |
|
| 1561 |
sp_mask = 0xffff; /* XXXX: use SS segment size ? */ |
| 1562 |
sp = ESP; |
| 1563 |
ssp = env->segs[R_SS].base; |
| 1564 |
if (shift == 1) { |
| 1565 |
/* 32 bits */
|
| 1566 |
POPL(ssp, sp, sp_mask, new_eip); |
| 1567 |
POPL(ssp, sp, sp_mask, new_cs); |
| 1568 |
new_cs &= 0xffff;
|
| 1569 |
POPL(ssp, sp, sp_mask, new_eflags); |
| 1570 |
} else {
|
| 1571 |
/* 16 bits */
|
| 1572 |
POPW(ssp, sp, sp_mask, new_eip); |
| 1573 |
POPW(ssp, sp, sp_mask, new_cs); |
| 1574 |
POPW(ssp, sp, sp_mask, new_eflags); |
| 1575 |
} |
| 1576 |
ESP = (ESP & ~sp_mask) | (sp & sp_mask); |
| 1577 |
load_seg_vm(R_CS, new_cs); |
| 1578 |
env->eip = new_eip; |
| 1579 |
if (env->eflags & VM_MASK)
|
| 1580 |
eflags_mask = TF_MASK | AC_MASK | ID_MASK | IF_MASK | RF_MASK | NT_MASK; |
| 1581 |
else
|
| 1582 |
eflags_mask = TF_MASK | AC_MASK | ID_MASK | IF_MASK | IOPL_MASK | RF_MASK | NT_MASK; |
| 1583 |
if (shift == 0) |
| 1584 |
eflags_mask &= 0xffff;
|
| 1585 |
load_eflags(new_eflags, eflags_mask); |
| 1586 |
} |
| 1587 |
|
| 1588 |
static inline void validate_seg(int seg_reg, int cpl) |
| 1589 |
{
|
| 1590 |
int dpl;
|
| 1591 |
uint32_t e2; |
| 1592 |
|
| 1593 |
e2 = env->segs[seg_reg].flags; |
| 1594 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 1595 |
if (!(e2 & DESC_CS_MASK) || !(e2 & DESC_C_MASK)) {
|
| 1596 |
/* data or non conforming code segment */
|
| 1597 |
if (dpl < cpl) {
|
| 1598 |
cpu_x86_load_seg_cache(env, seg_reg, 0, NULL, 0, 0); |
| 1599 |
} |
| 1600 |
} |
| 1601 |
} |
| 1602 |
|
| 1603 |
/* protected mode iret */
|
| 1604 |
static inline void helper_ret_protected(int shift, int is_iret, int addend) |
| 1605 |
{
|
| 1606 |
uint32_t sp, new_cs, new_eip, new_eflags, new_esp, new_ss, sp_mask; |
| 1607 |
uint32_t new_es, new_ds, new_fs, new_gs; |
| 1608 |
uint32_t e1, e2, ss_e1, ss_e2; |
| 1609 |
int cpl, dpl, rpl, eflags_mask, iopl;
|
| 1610 |
uint8_t *ssp; |
| 1611 |
|
| 1612 |
sp_mask = get_sp_mask(env->segs[R_SS].flags); |
| 1613 |
sp = ESP; |
| 1614 |
ssp = env->segs[R_SS].base; |
| 1615 |
new_eflags = 0; /* avoid warning */ |
| 1616 |
if (shift == 1) { |
| 1617 |
/* 32 bits */
|
| 1618 |
POPL(ssp, sp, sp_mask, new_eip); |
| 1619 |
POPL(ssp, sp, sp_mask, new_cs); |
| 1620 |
new_cs &= 0xffff;
|
| 1621 |
if (is_iret) {
|
| 1622 |
POPL(ssp, sp, sp_mask, new_eflags); |
| 1623 |
if (new_eflags & VM_MASK)
|
| 1624 |
goto return_to_vm86;
|
| 1625 |
} |
| 1626 |
} else {
|
| 1627 |
/* 16 bits */
|
| 1628 |
POPW(ssp, sp, sp_mask, new_eip); |
| 1629 |
POPW(ssp, sp, sp_mask, new_cs); |
| 1630 |
if (is_iret)
|
| 1631 |
POPW(ssp, sp, sp_mask, new_eflags); |
| 1632 |
} |
| 1633 |
#ifdef DEBUG_PCALL
|
| 1634 |
if (loglevel & CPU_LOG_PCALL) {
|
| 1635 |
fprintf(logfile, "lret new %04x:%08x s=%d addend=0x%x\n",
|
| 1636 |
new_cs, new_eip, shift, addend); |
| 1637 |
cpu_dump_state(env, logfile, fprintf, X86_DUMP_CCOP); |
| 1638 |
} |
| 1639 |
#endif
|
| 1640 |
if ((new_cs & 0xfffc) == 0) |
| 1641 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1642 |
if (load_segment(&e1, &e2, new_cs) != 0) |
| 1643 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1644 |
if (!(e2 & DESC_S_MASK) ||
|
| 1645 |
!(e2 & DESC_CS_MASK)) |
| 1646 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1647 |
cpl = env->hflags & HF_CPL_MASK; |
| 1648 |
rpl = new_cs & 3;
|
| 1649 |
if (rpl < cpl)
|
| 1650 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1651 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 1652 |
if (e2 & DESC_C_MASK) {
|
| 1653 |
if (dpl > rpl)
|
| 1654 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1655 |
} else {
|
| 1656 |
if (dpl != rpl)
|
| 1657 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1658 |
} |
| 1659 |
if (!(e2 & DESC_P_MASK))
|
| 1660 |
raise_exception_err(EXCP0B_NOSEG, new_cs & 0xfffc);
|
| 1661 |
|
| 1662 |
sp += addend; |
| 1663 |
if (rpl == cpl) {
|
| 1664 |
/* return to same priledge level */
|
| 1665 |
cpu_x86_load_seg_cache(env, R_CS, new_cs, |
| 1666 |
get_seg_base(e1, e2), |
| 1667 |
get_seg_limit(e1, e2), |
| 1668 |
e2); |
| 1669 |
} else {
|
| 1670 |
/* return to different priviledge level */
|
| 1671 |
if (shift == 1) { |
| 1672 |
/* 32 bits */
|
| 1673 |
POPL(ssp, sp, sp_mask, new_esp); |
| 1674 |
POPL(ssp, sp, sp_mask, new_ss); |
| 1675 |
new_ss &= 0xffff;
|
| 1676 |
} else {
|
| 1677 |
/* 16 bits */
|
| 1678 |
POPW(ssp, sp, sp_mask, new_esp); |
| 1679 |
POPW(ssp, sp, sp_mask, new_ss); |
| 1680 |
} |
| 1681 |
#ifdef DEBUG_PCALL
|
| 1682 |
if (loglevel & CPU_LOG_PCALL) {
|
| 1683 |
fprintf(logfile, "new ss:esp=%04x:%08x\n",
|
| 1684 |
new_ss, new_esp); |
| 1685 |
} |
| 1686 |
#endif
|
| 1687 |
|
| 1688 |
if ((new_ss & 3) != rpl) |
| 1689 |
raise_exception_err(EXCP0D_GPF, new_ss & 0xfffc);
|
| 1690 |
if (load_segment(&ss_e1, &ss_e2, new_ss) != 0) |
| 1691 |
raise_exception_err(EXCP0D_GPF, new_ss & 0xfffc);
|
| 1692 |
if (!(ss_e2 & DESC_S_MASK) ||
|
| 1693 |
(ss_e2 & DESC_CS_MASK) || |
| 1694 |
!(ss_e2 & DESC_W_MASK)) |
| 1695 |
raise_exception_err(EXCP0D_GPF, new_ss & 0xfffc);
|
| 1696 |
dpl = (ss_e2 >> DESC_DPL_SHIFT) & 3;
|
| 1697 |
if (dpl != rpl)
|
| 1698 |
raise_exception_err(EXCP0D_GPF, new_ss & 0xfffc);
|
| 1699 |
if (!(ss_e2 & DESC_P_MASK))
|
| 1700 |
raise_exception_err(EXCP0B_NOSEG, new_ss & 0xfffc);
|
| 1701 |
|
| 1702 |
cpu_x86_load_seg_cache(env, R_CS, new_cs, |
| 1703 |
get_seg_base(e1, e2), |
| 1704 |
get_seg_limit(e1, e2), |
| 1705 |
e2); |
| 1706 |
cpu_x86_load_seg_cache(env, R_SS, new_ss, |
| 1707 |
get_seg_base(ss_e1, ss_e2), |
| 1708 |
get_seg_limit(ss_e1, ss_e2), |
| 1709 |
ss_e2); |
| 1710 |
cpu_x86_set_cpl(env, rpl); |
| 1711 |
sp = new_esp; |
| 1712 |
sp_mask = get_sp_mask(ss_e2); |
| 1713 |
|
| 1714 |
/* validate data segments */
|
| 1715 |
validate_seg(R_ES, cpl); |
| 1716 |
validate_seg(R_DS, cpl); |
| 1717 |
validate_seg(R_FS, cpl); |
| 1718 |
validate_seg(R_GS, cpl); |
| 1719 |
|
| 1720 |
sp += addend; |
| 1721 |
} |
| 1722 |
ESP = (ESP & ~sp_mask) | (sp & sp_mask); |
| 1723 |
env->eip = new_eip; |
| 1724 |
if (is_iret) {
|
| 1725 |
/* NOTE: 'cpl' is the _old_ CPL */
|
| 1726 |
eflags_mask = TF_MASK | AC_MASK | ID_MASK | RF_MASK | NT_MASK; |
| 1727 |
if (cpl == 0) |
| 1728 |
eflags_mask |= IOPL_MASK; |
| 1729 |
iopl = (env->eflags >> IOPL_SHIFT) & 3;
|
| 1730 |
if (cpl <= iopl)
|
| 1731 |
eflags_mask |= IF_MASK; |
| 1732 |
if (shift == 0) |
| 1733 |
eflags_mask &= 0xffff;
|
| 1734 |
load_eflags(new_eflags, eflags_mask); |
| 1735 |
} |
| 1736 |
return;
|
| 1737 |
|
| 1738 |
return_to_vm86:
|
| 1739 |
POPL(ssp, sp, sp_mask, new_esp); |
| 1740 |
POPL(ssp, sp, sp_mask, new_ss); |
| 1741 |
POPL(ssp, sp, sp_mask, new_es); |
| 1742 |
POPL(ssp, sp, sp_mask, new_ds); |
| 1743 |
POPL(ssp, sp, sp_mask, new_fs); |
| 1744 |
POPL(ssp, sp, sp_mask, new_gs); |
| 1745 |
|
| 1746 |
/* modify processor state */
|
| 1747 |
load_eflags(new_eflags, TF_MASK | AC_MASK | ID_MASK | |
| 1748 |
IF_MASK | IOPL_MASK | VM_MASK | NT_MASK | VIF_MASK | VIP_MASK); |
| 1749 |
load_seg_vm(R_CS, new_cs & 0xffff);
|
| 1750 |
cpu_x86_set_cpl(env, 3);
|
| 1751 |
load_seg_vm(R_SS, new_ss & 0xffff);
|
| 1752 |
load_seg_vm(R_ES, new_es & 0xffff);
|
| 1753 |
load_seg_vm(R_DS, new_ds & 0xffff);
|
| 1754 |
load_seg_vm(R_FS, new_fs & 0xffff);
|
| 1755 |
load_seg_vm(R_GS, new_gs & 0xffff);
|
| 1756 |
|
| 1757 |
env->eip = new_eip & 0xffff;
|
| 1758 |
ESP = new_esp; |
| 1759 |
} |
| 1760 |
|
| 1761 |
void helper_iret_protected(int shift, int next_eip) |
| 1762 |
{
|
| 1763 |
int tss_selector, type;
|
| 1764 |
uint32_t e1, e2; |
| 1765 |
|
| 1766 |
/* specific case for TSS */
|
| 1767 |
if (env->eflags & NT_MASK) {
|
| 1768 |
tss_selector = lduw_kernel(env->tr.base + 0);
|
| 1769 |
if (tss_selector & 4) |
| 1770 |
raise_exception_err(EXCP0A_TSS, tss_selector & 0xfffc);
|
| 1771 |
if (load_segment(&e1, &e2, tss_selector) != 0) |
| 1772 |
raise_exception_err(EXCP0A_TSS, tss_selector & 0xfffc);
|
| 1773 |
type = (e2 >> DESC_TYPE_SHIFT) & 0x17;
|
| 1774 |
/* NOTE: we check both segment and busy TSS */
|
| 1775 |
if (type != 3) |
| 1776 |
raise_exception_err(EXCP0A_TSS, tss_selector & 0xfffc);
|
| 1777 |
switch_tss(tss_selector, e1, e2, SWITCH_TSS_IRET, next_eip); |
| 1778 |
} else {
|
| 1779 |
helper_ret_protected(shift, 1, 0); |
| 1780 |
} |
| 1781 |
} |
| 1782 |
|
| 1783 |
void helper_lret_protected(int shift, int addend) |
| 1784 |
{
|
| 1785 |
helper_ret_protected(shift, 0, addend);
|
| 1786 |
} |
| 1787 |
|
| 1788 |
void helper_sysenter(void) |
| 1789 |
{
|
| 1790 |
if (env->sysenter_cs == 0) { |
| 1791 |
raise_exception_err(EXCP0D_GPF, 0);
|
| 1792 |
} |
| 1793 |
env->eflags &= ~(VM_MASK | IF_MASK | RF_MASK); |
| 1794 |
cpu_x86_set_cpl(env, 0);
|
| 1795 |
cpu_x86_load_seg_cache(env, R_CS, env->sysenter_cs & 0xfffc,
|
| 1796 |
NULL, 0xffffffff, |
| 1797 |
DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | |
| 1798 |
DESC_S_MASK | |
| 1799 |
DESC_CS_MASK | DESC_R_MASK | DESC_A_MASK); |
| 1800 |
cpu_x86_load_seg_cache(env, R_SS, (env->sysenter_cs + 8) & 0xfffc, |
| 1801 |
NULL, 0xffffffff, |
| 1802 |
DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | |
| 1803 |
DESC_S_MASK | |
| 1804 |
DESC_W_MASK | DESC_A_MASK); |
| 1805 |
ESP = env->sysenter_esp; |
| 1806 |
EIP = env->sysenter_eip; |
| 1807 |
} |
| 1808 |
|
| 1809 |
void helper_sysexit(void) |
| 1810 |
{
|
| 1811 |
int cpl;
|
| 1812 |
|
| 1813 |
cpl = env->hflags & HF_CPL_MASK; |
| 1814 |
if (env->sysenter_cs == 0 || cpl != 0) { |
| 1815 |
raise_exception_err(EXCP0D_GPF, 0);
|
| 1816 |
} |
| 1817 |
cpu_x86_set_cpl(env, 3);
|
| 1818 |
cpu_x86_load_seg_cache(env, R_CS, ((env->sysenter_cs + 16) & 0xfffc) | 3, |
| 1819 |
NULL, 0xffffffff, |
| 1820 |
DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | |
| 1821 |
DESC_S_MASK | (3 << DESC_DPL_SHIFT) |
|
| 1822 |
DESC_CS_MASK | DESC_R_MASK | DESC_A_MASK); |
| 1823 |
cpu_x86_load_seg_cache(env, R_SS, ((env->sysenter_cs + 24) & 0xfffc) | 3, |
| 1824 |
NULL, 0xffffffff, |
| 1825 |
DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | |
| 1826 |
DESC_S_MASK | (3 << DESC_DPL_SHIFT) |
|
| 1827 |
DESC_W_MASK | DESC_A_MASK); |
| 1828 |
ESP = ECX; |
| 1829 |
EIP = EDX; |
| 1830 |
} |
| 1831 |
|
| 1832 |
void helper_movl_crN_T0(int reg) |
| 1833 |
{
|
| 1834 |
switch(reg) {
|
| 1835 |
case 0: |
| 1836 |
cpu_x86_update_cr0(env, T0); |
| 1837 |
break;
|
| 1838 |
case 3: |
| 1839 |
cpu_x86_update_cr3(env, T0); |
| 1840 |
break;
|
| 1841 |
case 4: |
| 1842 |
cpu_x86_update_cr4(env, T0); |
| 1843 |
break;
|
| 1844 |
default:
|
| 1845 |
env->cr[reg] = T0; |
| 1846 |
break;
|
| 1847 |
} |
| 1848 |
} |
| 1849 |
|
| 1850 |
/* XXX: do more */
|
| 1851 |
void helper_movl_drN_T0(int reg) |
| 1852 |
{
|
| 1853 |
env->dr[reg] = T0; |
| 1854 |
} |
| 1855 |
|
| 1856 |
void helper_invlpg(unsigned int addr) |
| 1857 |
{
|
| 1858 |
cpu_x86_flush_tlb(env, addr); |
| 1859 |
} |
| 1860 |
|
| 1861 |
void helper_rdtsc(void) |
| 1862 |
{
|
| 1863 |
uint64_t val; |
| 1864 |
|
| 1865 |
val = cpu_get_tsc(env); |
| 1866 |
EAX = val; |
| 1867 |
EDX = val >> 32;
|
| 1868 |
} |
| 1869 |
|
| 1870 |
void helper_wrmsr(void) |
| 1871 |
{
|
| 1872 |
switch(ECX) {
|
| 1873 |
case MSR_IA32_SYSENTER_CS:
|
| 1874 |
env->sysenter_cs = EAX & 0xffff;
|
| 1875 |
break;
|
| 1876 |
case MSR_IA32_SYSENTER_ESP:
|
| 1877 |
env->sysenter_esp = EAX; |
| 1878 |
break;
|
| 1879 |
case MSR_IA32_SYSENTER_EIP:
|
| 1880 |
env->sysenter_eip = EAX; |
| 1881 |
break;
|
| 1882 |
default:
|
| 1883 |
/* XXX: exception ? */
|
| 1884 |
break;
|
| 1885 |
} |
| 1886 |
} |
| 1887 |
|
| 1888 |
void helper_rdmsr(void) |
| 1889 |
{
|
| 1890 |
switch(ECX) {
|
| 1891 |
case MSR_IA32_SYSENTER_CS:
|
| 1892 |
EAX = env->sysenter_cs; |
| 1893 |
EDX = 0;
|
| 1894 |
break;
|
| 1895 |
case MSR_IA32_SYSENTER_ESP:
|
| 1896 |
EAX = env->sysenter_esp; |
| 1897 |
EDX = 0;
|
| 1898 |
break;
|
| 1899 |
case MSR_IA32_SYSENTER_EIP:
|
| 1900 |
EAX = env->sysenter_eip; |
| 1901 |
EDX = 0;
|
| 1902 |
break;
|
| 1903 |
default:
|
| 1904 |
/* XXX: exception ? */
|
| 1905 |
break;
|
| 1906 |
} |
| 1907 |
} |
| 1908 |
|
| 1909 |
void helper_lsl(void) |
| 1910 |
{
|
| 1911 |
unsigned int selector, limit; |
| 1912 |
uint32_t e1, e2; |
| 1913 |
int rpl, dpl, cpl, type;
|
| 1914 |
|
| 1915 |
CC_SRC = cc_table[CC_OP].compute_all() & ~CC_Z; |
| 1916 |
selector = T0 & 0xffff;
|
| 1917 |
if (load_segment(&e1, &e2, selector) != 0) |
| 1918 |
return;
|
| 1919 |
rpl = selector & 3;
|
| 1920 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 1921 |
cpl = env->hflags & HF_CPL_MASK; |
| 1922 |
if (e2 & DESC_S_MASK) {
|
| 1923 |
if ((e2 & DESC_CS_MASK) && (e2 & DESC_C_MASK)) {
|
| 1924 |
/* conforming */
|
| 1925 |
} else {
|
| 1926 |
if (dpl < cpl || dpl < rpl)
|
| 1927 |
return;
|
| 1928 |
} |
| 1929 |
} else {
|
| 1930 |
type = (e2 >> DESC_TYPE_SHIFT) & 0xf;
|
| 1931 |
switch(type) {
|
| 1932 |
case 1: |
| 1933 |
case 2: |
| 1934 |
case 3: |
| 1935 |
case 9: |
| 1936 |
case 11: |
| 1937 |
break;
|
| 1938 |
default:
|
| 1939 |
return;
|
| 1940 |
} |
| 1941 |
if (dpl < cpl || dpl < rpl)
|
| 1942 |
return;
|
| 1943 |
} |
| 1944 |
limit = get_seg_limit(e1, e2); |
| 1945 |
T1 = limit; |
| 1946 |
CC_SRC |= CC_Z; |
| 1947 |
} |
| 1948 |
|
| 1949 |
void helper_lar(void) |
| 1950 |
{
|
| 1951 |
unsigned int selector; |
| 1952 |
uint32_t e1, e2; |
| 1953 |
int rpl, dpl, cpl, type;
|
| 1954 |
|
| 1955 |
CC_SRC = cc_table[CC_OP].compute_all() & ~CC_Z; |
| 1956 |
selector = T0 & 0xffff;
|
| 1957 |
if ((selector & 0xfffc) == 0) |
| 1958 |
return;
|
| 1959 |
if (load_segment(&e1, &e2, selector) != 0) |
| 1960 |
return;
|
| 1961 |
rpl = selector & 3;
|
| 1962 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 1963 |
cpl = env->hflags & HF_CPL_MASK; |
| 1964 |
if (e2 & DESC_S_MASK) {
|
| 1965 |
if ((e2 & DESC_CS_MASK) && (e2 & DESC_C_MASK)) {
|
| 1966 |
/* conforming */
|
| 1967 |
} else {
|
| 1968 |
if (dpl < cpl || dpl < rpl)
|
| 1969 |
return;
|
| 1970 |
} |
| 1971 |
} else {
|
| 1972 |
type = (e2 >> DESC_TYPE_SHIFT) & 0xf;
|
| 1973 |
switch(type) {
|
| 1974 |
case 1: |
| 1975 |
case 2: |
| 1976 |
case 3: |
| 1977 |
case 4: |
| 1978 |
case 5: |
| 1979 |
case 9: |
| 1980 |
case 11: |
| 1981 |
case 12: |
| 1982 |
break;
|
| 1983 |
default:
|
| 1984 |
return;
|
| 1985 |
} |
| 1986 |
if (dpl < cpl || dpl < rpl)
|
| 1987 |
return;
|
| 1988 |
} |
| 1989 |
T1 = e2 & 0x00f0ff00;
|
| 1990 |
CC_SRC |= CC_Z; |
| 1991 |
} |
| 1992 |
|
| 1993 |
void helper_verr(void) |
| 1994 |
{
|
| 1995 |
unsigned int selector; |
| 1996 |
uint32_t e1, e2; |
| 1997 |
int rpl, dpl, cpl;
|
| 1998 |
|
| 1999 |
CC_SRC = cc_table[CC_OP].compute_all() & ~CC_Z; |
| 2000 |
selector = T0 & 0xffff;
|
| 2001 |
if ((selector & 0xfffc) == 0) |
| 2002 |
return;
|
| 2003 |
if (load_segment(&e1, &e2, selector) != 0) |
| 2004 |
return;
|
| 2005 |
if (!(e2 & DESC_S_MASK))
|
| 2006 |
return;
|
| 2007 |
rpl = selector & 3;
|
| 2008 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 2009 |
cpl = env->hflags & HF_CPL_MASK; |
| 2010 |
if (e2 & DESC_CS_MASK) {
|
| 2011 |
if (!(e2 & DESC_R_MASK))
|
| 2012 |
return;
|
| 2013 |
if (!(e2 & DESC_C_MASK)) {
|
| 2014 |
if (dpl < cpl || dpl < rpl)
|
| 2015 |
return;
|
| 2016 |
} |
| 2017 |
} else {
|
| 2018 |
if (dpl < cpl || dpl < rpl)
|
| 2019 |
return;
|
| 2020 |
} |
| 2021 |
CC_SRC |= CC_Z; |
| 2022 |
} |
| 2023 |
|
| 2024 |
void helper_verw(void) |
| 2025 |
{
|
| 2026 |
unsigned int selector; |
| 2027 |
uint32_t e1, e2; |
| 2028 |
int rpl, dpl, cpl;
|
| 2029 |
|
| 2030 |
CC_SRC = cc_table[CC_OP].compute_all() & ~CC_Z; |
| 2031 |
selector = T0 & 0xffff;
|
| 2032 |
if ((selector & 0xfffc) == 0) |
| 2033 |
return;
|
| 2034 |
if (load_segment(&e1, &e2, selector) != 0) |
| 2035 |
return;
|
| 2036 |
if (!(e2 & DESC_S_MASK))
|
| 2037 |
return;
|
| 2038 |
rpl = selector & 3;
|
| 2039 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 2040 |
cpl = env->hflags & HF_CPL_MASK; |
| 2041 |
if (e2 & DESC_CS_MASK) {
|
| 2042 |
return;
|
| 2043 |
} else {
|
| 2044 |
if (dpl < cpl || dpl < rpl)
|
| 2045 |
return;
|
| 2046 |
if (!(e2 & DESC_W_MASK))
|
| 2047 |
return;
|
| 2048 |
} |
| 2049 |
CC_SRC |= CC_Z; |
| 2050 |
} |
| 2051 |
|
| 2052 |
/* FPU helpers */
|
| 2053 |
|
| 2054 |
void helper_fldt_ST0_A0(void) |
| 2055 |
{
|
| 2056 |
int new_fpstt;
|
| 2057 |
new_fpstt = (env->fpstt - 1) & 7; |
| 2058 |
env->fpregs[new_fpstt] = helper_fldt((uint8_t *)A0); |
| 2059 |
env->fpstt = new_fpstt; |
| 2060 |
env->fptags[new_fpstt] = 0; /* validate stack entry */ |
| 2061 |
} |
| 2062 |
|
| 2063 |
void helper_fstt_ST0_A0(void) |
| 2064 |
{
|
| 2065 |
helper_fstt(ST0, (uint8_t *)A0); |
| 2066 |
} |
| 2067 |
|
| 2068 |
void fpu_set_exception(int mask) |
| 2069 |
{
|
| 2070 |
env->fpus |= mask; |
| 2071 |
if (env->fpus & (~env->fpuc & FPUC_EM))
|
| 2072 |
env->fpus |= FPUS_SE | FPUS_B; |
| 2073 |
} |
| 2074 |
|
| 2075 |
CPU86_LDouble helper_fdiv(CPU86_LDouble a, CPU86_LDouble b) |
| 2076 |
{
|
| 2077 |
if (b == 0.0) |
| 2078 |
fpu_set_exception(FPUS_ZE); |
| 2079 |
return a / b;
|
| 2080 |
} |
| 2081 |
|
| 2082 |
void fpu_raise_exception(void) |
| 2083 |
{
|
| 2084 |
if (env->cr[0] & CR0_NE_MASK) { |
| 2085 |
raise_exception(EXCP10_COPR); |
| 2086 |
} |
| 2087 |
#if !defined(CONFIG_USER_ONLY)
|
| 2088 |
else {
|
| 2089 |
cpu_set_ferr(env); |
| 2090 |
} |
| 2091 |
#endif
|
| 2092 |
} |
| 2093 |
|
| 2094 |
/* BCD ops */
|
| 2095 |
|
| 2096 |
void helper_fbld_ST0_A0(void) |
| 2097 |
{
|
| 2098 |
CPU86_LDouble tmp; |
| 2099 |
uint64_t val; |
| 2100 |
unsigned int v; |
| 2101 |
int i;
|
| 2102 |
|
| 2103 |
val = 0;
|
| 2104 |
for(i = 8; i >= 0; i--) { |
| 2105 |
v = ldub((uint8_t *)A0 + i); |
| 2106 |
val = (val * 100) + ((v >> 4) * 10) + (v & 0xf); |
| 2107 |
} |
| 2108 |
tmp = val; |
| 2109 |
if (ldub((uint8_t *)A0 + 9) & 0x80) |
| 2110 |
tmp = -tmp; |
| 2111 |
fpush(); |
| 2112 |
ST0 = tmp; |
| 2113 |
} |
| 2114 |
|
| 2115 |
void helper_fbst_ST0_A0(void) |
| 2116 |
{
|
| 2117 |
CPU86_LDouble tmp; |
| 2118 |
int v;
|
| 2119 |
uint8_t *mem_ref, *mem_end; |
| 2120 |
int64_t val; |
| 2121 |
|
| 2122 |
tmp = rint(ST0); |
| 2123 |
val = (int64_t)tmp; |
| 2124 |
mem_ref = (uint8_t *)A0; |
| 2125 |
mem_end = mem_ref + 9;
|
| 2126 |
if (val < 0) { |
| 2127 |
stb(mem_end, 0x80);
|
| 2128 |
val = -val; |
| 2129 |
} else {
|
| 2130 |
stb(mem_end, 0x00);
|
| 2131 |
} |
| 2132 |
while (mem_ref < mem_end) {
|
| 2133 |
if (val == 0) |
| 2134 |
break;
|
| 2135 |
v = val % 100;
|
| 2136 |
val = val / 100;
|
| 2137 |
v = ((v / 10) << 4) | (v % 10); |
| 2138 |
stb(mem_ref++, v); |
| 2139 |
} |
| 2140 |
while (mem_ref < mem_end) {
|
| 2141 |
stb(mem_ref++, 0);
|
| 2142 |
} |
| 2143 |
} |
| 2144 |
|
| 2145 |
void helper_f2xm1(void) |
| 2146 |
{
|
| 2147 |
ST0 = pow(2.0,ST0) - 1.0; |
| 2148 |
} |
| 2149 |
|
| 2150 |
void helper_fyl2x(void) |
| 2151 |
{
|
| 2152 |
CPU86_LDouble fptemp; |
| 2153 |
|
| 2154 |
fptemp = ST0; |
| 2155 |
if (fptemp>0.0){ |
| 2156 |
fptemp = log(fptemp)/log(2.0); /* log2(ST) */ |
| 2157 |
ST1 *= fptemp; |
| 2158 |
fpop(); |
| 2159 |
} else {
|
| 2160 |
env->fpus &= (~0x4700);
|
| 2161 |
env->fpus |= 0x400;
|
| 2162 |
} |
| 2163 |
} |
| 2164 |
|
| 2165 |
void helper_fptan(void) |
| 2166 |
{
|
| 2167 |
CPU86_LDouble fptemp; |
| 2168 |
|
| 2169 |
fptemp = ST0; |
| 2170 |
if((fptemp > MAXTAN)||(fptemp < -MAXTAN)) {
|
| 2171 |
env->fpus |= 0x400;
|
| 2172 |
} else {
|
| 2173 |
ST0 = tan(fptemp); |
| 2174 |
fpush(); |
| 2175 |
ST0 = 1.0; |
| 2176 |
env->fpus &= (~0x400); /* C2 <-- 0 */ |
| 2177 |
/* the above code is for |arg| < 2**52 only */
|
| 2178 |
} |
| 2179 |
} |
| 2180 |
|
| 2181 |
void helper_fpatan(void) |
| 2182 |
{
|
| 2183 |
CPU86_LDouble fptemp, fpsrcop; |
| 2184 |
|
| 2185 |
fpsrcop = ST1; |
| 2186 |
fptemp = ST0; |
| 2187 |
ST1 = atan2(fpsrcop,fptemp); |
| 2188 |
fpop(); |
| 2189 |
} |
| 2190 |
|
| 2191 |
void helper_fxtract(void) |
| 2192 |
{
|
| 2193 |
CPU86_LDoubleU temp; |
| 2194 |
unsigned int expdif; |
| 2195 |
|
| 2196 |
temp.d = ST0; |
| 2197 |
expdif = EXPD(temp) - EXPBIAS; |
| 2198 |
/*DP exponent bias*/
|
| 2199 |
ST0 = expdif; |
| 2200 |
fpush(); |
| 2201 |
BIASEXPONENT(temp); |
| 2202 |
ST0 = temp.d; |
| 2203 |
} |
| 2204 |
|
| 2205 |
void helper_fprem1(void) |
| 2206 |
{
|
| 2207 |
CPU86_LDouble dblq, fpsrcop, fptemp; |
| 2208 |
CPU86_LDoubleU fpsrcop1, fptemp1; |
| 2209 |
int expdif;
|
| 2210 |
int q;
|
| 2211 |
|
| 2212 |
fpsrcop = ST0; |
| 2213 |
fptemp = ST1; |
| 2214 |
fpsrcop1.d = fpsrcop; |
| 2215 |
fptemp1.d = fptemp; |
| 2216 |
expdif = EXPD(fpsrcop1) - EXPD(fptemp1); |
| 2217 |
if (expdif < 53) { |
| 2218 |
dblq = fpsrcop / fptemp; |
| 2219 |
dblq = (dblq < 0.0)? ceil(dblq): floor(dblq); |
| 2220 |
ST0 = fpsrcop - fptemp*dblq; |
| 2221 |
q = (int)dblq; /* cutting off top bits is assumed here */ |
| 2222 |
env->fpus &= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */ |
| 2223 |
/* (C0,C1,C3) <-- (q2,q1,q0) */
|
| 2224 |
env->fpus |= (q&0x4) << 6; /* (C0) <-- q2 */ |
| 2225 |
env->fpus |= (q&0x2) << 8; /* (C1) <-- q1 */ |
| 2226 |
env->fpus |= (q&0x1) << 14; /* (C3) <-- q0 */ |
| 2227 |
} else {
|
| 2228 |
env->fpus |= 0x400; /* C2 <-- 1 */ |
| 2229 |
fptemp = pow(2.0, expdif-50); |
| 2230 |
fpsrcop = (ST0 / ST1) / fptemp; |
| 2231 |
/* fpsrcop = integer obtained by rounding to the nearest */
|
| 2232 |
fpsrcop = (fpsrcop-floor(fpsrcop) < ceil(fpsrcop)-fpsrcop)? |
| 2233 |
floor(fpsrcop): ceil(fpsrcop); |
| 2234 |
ST0 -= (ST1 * fpsrcop * fptemp); |
| 2235 |
} |
| 2236 |
} |
| 2237 |
|
| 2238 |
void helper_fprem(void) |
| 2239 |
{
|
| 2240 |
CPU86_LDouble dblq, fpsrcop, fptemp; |
| 2241 |
CPU86_LDoubleU fpsrcop1, fptemp1; |
| 2242 |
int expdif;
|
| 2243 |
int q;
|
| 2244 |
|
| 2245 |
fpsrcop = ST0; |
| 2246 |
fptemp = ST1; |
| 2247 |
fpsrcop1.d = fpsrcop; |
| 2248 |
fptemp1.d = fptemp; |
| 2249 |
expdif = EXPD(fpsrcop1) - EXPD(fptemp1); |
| 2250 |
if ( expdif < 53 ) { |
| 2251 |
dblq = fpsrcop / fptemp; |
| 2252 |
dblq = (dblq < 0.0)? ceil(dblq): floor(dblq); |
| 2253 |
ST0 = fpsrcop - fptemp*dblq; |
| 2254 |
q = (int)dblq; /* cutting off top bits is assumed here */ |
| 2255 |
env->fpus &= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */ |
| 2256 |
/* (C0,C1,C3) <-- (q2,q1,q0) */
|
| 2257 |
env->fpus |= (q&0x4) << 6; /* (C0) <-- q2 */ |
| 2258 |
env->fpus |= (q&0x2) << 8; /* (C1) <-- q1 */ |
| 2259 |
env->fpus |= (q&0x1) << 14; /* (C3) <-- q0 */ |
| 2260 |
} else {
|
| 2261 |
env->fpus |= 0x400; /* C2 <-- 1 */ |
| 2262 |
fptemp = pow(2.0, expdif-50); |
| 2263 |
fpsrcop = (ST0 / ST1) / fptemp; |
| 2264 |
/* fpsrcop = integer obtained by chopping */
|
| 2265 |
fpsrcop = (fpsrcop < 0.0)? |
| 2266 |
-(floor(fabs(fpsrcop))): floor(fpsrcop); |
| 2267 |
ST0 -= (ST1 * fpsrcop * fptemp); |
| 2268 |
} |
| 2269 |
} |
| 2270 |
|
| 2271 |
void helper_fyl2xp1(void) |
| 2272 |
{
|
| 2273 |
CPU86_LDouble fptemp; |
| 2274 |
|
| 2275 |
fptemp = ST0; |
| 2276 |
if ((fptemp+1.0)>0.0) { |
| 2277 |
fptemp = log(fptemp+1.0) / log(2.0); /* log2(ST+1.0) */ |
| 2278 |
ST1 *= fptemp; |
| 2279 |
fpop(); |
| 2280 |
} else {
|
| 2281 |
env->fpus &= (~0x4700);
|
| 2282 |
env->fpus |= 0x400;
|
| 2283 |
} |
| 2284 |
} |
| 2285 |
|
| 2286 |
void helper_fsqrt(void) |
| 2287 |
{
|
| 2288 |
CPU86_LDouble fptemp; |
| 2289 |
|
| 2290 |
fptemp = ST0; |
| 2291 |
if (fptemp<0.0) { |
| 2292 |
env->fpus &= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */ |
| 2293 |
env->fpus |= 0x400;
|
| 2294 |
} |
| 2295 |
ST0 = sqrt(fptemp); |
| 2296 |
} |
| 2297 |
|
| 2298 |
void helper_fsincos(void) |
| 2299 |
{
|
| 2300 |
CPU86_LDouble fptemp; |
| 2301 |
|
| 2302 |
fptemp = ST0; |
| 2303 |
if ((fptemp > MAXTAN)||(fptemp < -MAXTAN)) {
|
| 2304 |
env->fpus |= 0x400;
|
| 2305 |
} else {
|
| 2306 |
ST0 = sin(fptemp); |
| 2307 |
fpush(); |
| 2308 |
ST0 = cos(fptemp); |
| 2309 |
env->fpus &= (~0x400); /* C2 <-- 0 */ |
| 2310 |
/* the above code is for |arg| < 2**63 only */
|
| 2311 |
} |
| 2312 |
} |
| 2313 |
|
| 2314 |
void helper_frndint(void) |
| 2315 |
{
|
| 2316 |
CPU86_LDouble a; |
| 2317 |
|
| 2318 |
a = ST0; |
| 2319 |
#ifdef __arm__
|
| 2320 |
switch(env->fpuc & RC_MASK) {
|
| 2321 |
default:
|
| 2322 |
case RC_NEAR:
|
| 2323 |
asm("rndd %0, %1" : "=f" (a) : "f"(a)); |
| 2324 |
break;
|
| 2325 |
case RC_DOWN:
|
| 2326 |
asm("rnddm %0, %1" : "=f" (a) : "f"(a)); |
| 2327 |
break;
|
| 2328 |
case RC_UP:
|
| 2329 |
asm("rnddp %0, %1" : "=f" (a) : "f"(a)); |
| 2330 |
break;
|
| 2331 |
case RC_CHOP:
|
| 2332 |
asm("rnddz %0, %1" : "=f" (a) : "f"(a)); |
| 2333 |
break;
|
| 2334 |
} |
| 2335 |
#else
|
| 2336 |
a = rint(a); |
| 2337 |
#endif
|
| 2338 |
ST0 = a; |
| 2339 |
} |
| 2340 |
|
| 2341 |
void helper_fscale(void) |
| 2342 |
{
|
| 2343 |
CPU86_LDouble fpsrcop, fptemp; |
| 2344 |
|
| 2345 |
fpsrcop = 2.0; |
| 2346 |
fptemp = pow(fpsrcop,ST1); |
| 2347 |
ST0 *= fptemp; |
| 2348 |
} |
| 2349 |
|
| 2350 |
void helper_fsin(void) |
| 2351 |
{
|
| 2352 |
CPU86_LDouble fptemp; |
| 2353 |
|
| 2354 |
fptemp = ST0; |
| 2355 |
if ((fptemp > MAXTAN)||(fptemp < -MAXTAN)) {
|
| 2356 |
env->fpus |= 0x400;
|
| 2357 |
} else {
|
| 2358 |
ST0 = sin(fptemp); |
| 2359 |
env->fpus &= (~0x400); /* C2 <-- 0 */ |
| 2360 |
/* the above code is for |arg| < 2**53 only */
|
| 2361 |
} |
| 2362 |
} |
| 2363 |
|
| 2364 |
void helper_fcos(void) |
| 2365 |
{
|
| 2366 |
CPU86_LDouble fptemp; |
| 2367 |
|
| 2368 |
fptemp = ST0; |
| 2369 |
if((fptemp > MAXTAN)||(fptemp < -MAXTAN)) {
|
| 2370 |
env->fpus |= 0x400;
|
| 2371 |
} else {
|
| 2372 |
ST0 = cos(fptemp); |
| 2373 |
env->fpus &= (~0x400); /* C2 <-- 0 */ |
| 2374 |
/* the above code is for |arg5 < 2**63 only */
|
| 2375 |
} |
| 2376 |
} |
| 2377 |
|
| 2378 |
void helper_fxam_ST0(void) |
| 2379 |
{
|
| 2380 |
CPU86_LDoubleU temp; |
| 2381 |
int expdif;
|
| 2382 |
|
| 2383 |
temp.d = ST0; |
| 2384 |
|
| 2385 |
env->fpus &= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */ |
| 2386 |
if (SIGND(temp))
|
| 2387 |
env->fpus |= 0x200; /* C1 <-- 1 */ |
| 2388 |
|
| 2389 |
expdif = EXPD(temp); |
| 2390 |
if (expdif == MAXEXPD) {
|
| 2391 |
if (MANTD(temp) == 0) |
| 2392 |
env->fpus |= 0x500 /*Infinity*/; |
| 2393 |
else
|
| 2394 |
env->fpus |= 0x100 /*NaN*/; |
| 2395 |
} else if (expdif == 0) { |
| 2396 |
if (MANTD(temp) == 0) |
| 2397 |
env->fpus |= 0x4000 /*Zero*/; |
| 2398 |
else
|
| 2399 |
env->fpus |= 0x4400 /*Denormal*/; |
| 2400 |
} else {
|
| 2401 |
env->fpus |= 0x400;
|
| 2402 |
} |
| 2403 |
} |
| 2404 |
|
| 2405 |
void helper_fstenv(uint8_t *ptr, int data32) |
| 2406 |
{
|
| 2407 |
int fpus, fptag, exp, i;
|
| 2408 |
uint64_t mant; |
| 2409 |
CPU86_LDoubleU tmp; |
| 2410 |
|
| 2411 |
fpus = (env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11; |
| 2412 |
fptag = 0;
|
| 2413 |
for (i=7; i>=0; i--) { |
| 2414 |
fptag <<= 2;
|
| 2415 |
if (env->fptags[i]) {
|
| 2416 |
fptag |= 3;
|
| 2417 |
} else {
|
| 2418 |
tmp.d = env->fpregs[i]; |
| 2419 |
exp = EXPD(tmp); |
| 2420 |
mant = MANTD(tmp); |
| 2421 |
if (exp == 0 && mant == 0) { |
| 2422 |
/* zero */
|
| 2423 |
fptag |= 1;
|
| 2424 |
} else if (exp == 0 || exp == MAXEXPD |
| 2425 |
#ifdef USE_X86LDOUBLE
|
| 2426 |
|| (mant & (1LL << 63)) == 0 |
| 2427 |
#endif
|
| 2428 |
) {
|
| 2429 |
/* NaNs, infinity, denormal */
|
| 2430 |
fptag |= 2;
|
| 2431 |
} |
| 2432 |
} |
| 2433 |
} |
| 2434 |
if (data32) {
|
| 2435 |
/* 32 bit */
|
| 2436 |
stl(ptr, env->fpuc); |
| 2437 |
stl(ptr + 4, fpus);
|
| 2438 |
stl(ptr + 8, fptag);
|
| 2439 |
stl(ptr + 12, 0); /* fpip */ |
| 2440 |
stl(ptr + 16, 0); /* fpcs */ |
| 2441 |
stl(ptr + 20, 0); /* fpoo */ |
| 2442 |
stl(ptr + 24, 0); /* fpos */ |
| 2443 |
} else {
|
| 2444 |
/* 16 bit */
|
| 2445 |
stw(ptr, env->fpuc); |
| 2446 |
stw(ptr + 2, fpus);
|
| 2447 |
stw(ptr + 4, fptag);
|
| 2448 |
stw(ptr + 6, 0); |
| 2449 |
stw(ptr + 8, 0); |
| 2450 |
stw(ptr + 10, 0); |
| 2451 |
stw(ptr + 12, 0); |
| 2452 |
} |
| 2453 |
} |
| 2454 |
|
| 2455 |
void helper_fldenv(uint8_t *ptr, int data32) |
| 2456 |
{
|
| 2457 |
int i, fpus, fptag;
|
| 2458 |
|
| 2459 |
if (data32) {
|
| 2460 |
env->fpuc = lduw(ptr); |
| 2461 |
fpus = lduw(ptr + 4);
|
| 2462 |
fptag = lduw(ptr + 8);
|
| 2463 |
} |
| 2464 |
else {
|
| 2465 |
env->fpuc = lduw(ptr); |
| 2466 |
fpus = lduw(ptr + 2);
|
| 2467 |
fptag = lduw(ptr + 4);
|
| 2468 |
} |
| 2469 |
env->fpstt = (fpus >> 11) & 7; |
| 2470 |
env->fpus = fpus & ~0x3800;
|
| 2471 |
for(i = 0;i < 8; i++) { |
| 2472 |
env->fptags[i] = ((fptag & 3) == 3); |
| 2473 |
fptag >>= 2;
|
| 2474 |
} |
| 2475 |
} |
| 2476 |
|
| 2477 |
void helper_fsave(uint8_t *ptr, int data32) |
| 2478 |
{
|
| 2479 |
CPU86_LDouble tmp; |
| 2480 |
int i;
|
| 2481 |
|
| 2482 |
helper_fstenv(ptr, data32); |
| 2483 |
|
| 2484 |
ptr += (14 << data32);
|
| 2485 |
for(i = 0;i < 8; i++) { |
| 2486 |
tmp = ST(i); |
| 2487 |
helper_fstt(tmp, ptr); |
| 2488 |
ptr += 10;
|
| 2489 |
} |
| 2490 |
|
| 2491 |
/* fninit */
|
| 2492 |
env->fpus = 0;
|
| 2493 |
env->fpstt = 0;
|
| 2494 |
env->fpuc = 0x37f;
|
| 2495 |
env->fptags[0] = 1; |
| 2496 |
env->fptags[1] = 1; |
| 2497 |
env->fptags[2] = 1; |
| 2498 |
env->fptags[3] = 1; |
| 2499 |
env->fptags[4] = 1; |
| 2500 |
env->fptags[5] = 1; |
| 2501 |
env->fptags[6] = 1; |
| 2502 |
env->fptags[7] = 1; |
| 2503 |
} |
| 2504 |
|
| 2505 |
void helper_frstor(uint8_t *ptr, int data32) |
| 2506 |
{
|
| 2507 |
CPU86_LDouble tmp; |
| 2508 |
int i;
|
| 2509 |
|
| 2510 |
helper_fldenv(ptr, data32); |
| 2511 |
ptr += (14 << data32);
|
| 2512 |
|
| 2513 |
for(i = 0;i < 8; i++) { |
| 2514 |
tmp = helper_fldt(ptr); |
| 2515 |
ST(i) = tmp; |
| 2516 |
ptr += 10;
|
| 2517 |
} |
| 2518 |
} |
| 2519 |
|
| 2520 |
/* XXX: merge with helper_fstt ? */
|
| 2521 |
|
| 2522 |
#ifndef USE_X86LDOUBLE
|
| 2523 |
|
| 2524 |
void cpu_get_fp80(uint64_t *pmant, uint16_t *pexp, CPU86_LDouble f)
|
| 2525 |
{
|
| 2526 |
CPU86_LDoubleU temp; |
| 2527 |
int e;
|
| 2528 |
|
| 2529 |
temp.d = f; |
| 2530 |
/* mantissa */
|
| 2531 |
*pmant = (MANTD(temp) << 11) | (1LL << 63); |
| 2532 |
/* exponent + sign */
|
| 2533 |
e = EXPD(temp) - EXPBIAS + 16383;
|
| 2534 |
e |= SIGND(temp) >> 16;
|
| 2535 |
*pexp = e; |
| 2536 |
} |
| 2537 |
|
| 2538 |
CPU86_LDouble cpu_set_fp80(uint64_t mant, uint16_t upper) |
| 2539 |
{
|
| 2540 |
CPU86_LDoubleU temp; |
| 2541 |
int e;
|
| 2542 |
uint64_t ll; |
| 2543 |
|
| 2544 |
/* XXX: handle overflow ? */
|
| 2545 |
e = (upper & 0x7fff) - 16383 + EXPBIAS; /* exponent */ |
| 2546 |
e |= (upper >> 4) & 0x800; /* sign */ |
| 2547 |
ll = (mant >> 11) & ((1LL << 52) - 1); |
| 2548 |
#ifdef __arm__
|
| 2549 |
temp.l.upper = (e << 20) | (ll >> 32); |
| 2550 |
temp.l.lower = ll; |
| 2551 |
#else
|
| 2552 |
temp.ll = ll | ((uint64_t)e << 52);
|
| 2553 |
#endif
|
| 2554 |
return temp.d;
|
| 2555 |
} |
| 2556 |
|
| 2557 |
#else
|
| 2558 |
|
| 2559 |
void cpu_get_fp80(uint64_t *pmant, uint16_t *pexp, CPU86_LDouble f)
|
| 2560 |
{
|
| 2561 |
CPU86_LDoubleU temp; |
| 2562 |
|
| 2563 |
temp.d = f; |
| 2564 |
*pmant = temp.l.lower; |
| 2565 |
*pexp = temp.l.upper; |
| 2566 |
} |
| 2567 |
|
| 2568 |
CPU86_LDouble cpu_set_fp80(uint64_t mant, uint16_t upper) |
| 2569 |
{
|
| 2570 |
CPU86_LDoubleU temp; |
| 2571 |
|
| 2572 |
temp.l.upper = upper; |
| 2573 |
temp.l.lower = mant; |
| 2574 |
return temp.d;
|
| 2575 |
} |
| 2576 |
#endif
|
| 2577 |
|
| 2578 |
#if !defined(CONFIG_USER_ONLY)
|
| 2579 |
|
| 2580 |
#define MMUSUFFIX _mmu
|
| 2581 |
#define GETPC() (__builtin_return_address(0)) |
| 2582 |
|
| 2583 |
#define SHIFT 0 |
| 2584 |
#include "softmmu_template.h" |
| 2585 |
|
| 2586 |
#define SHIFT 1 |
| 2587 |
#include "softmmu_template.h" |
| 2588 |
|
| 2589 |
#define SHIFT 2 |
| 2590 |
#include "softmmu_template.h" |
| 2591 |
|
| 2592 |
#define SHIFT 3 |
| 2593 |
#include "softmmu_template.h" |
| 2594 |
|
| 2595 |
#endif
|
| 2596 |
|
| 2597 |
/* try to fill the TLB and return an exception if error. If retaddr is
|
| 2598 |
NULL, it means that the function was called in C code (i.e. not
|
| 2599 |
from generated code or from helper.c) */
|
| 2600 |
/* XXX: fix it to restore all registers */
|
| 2601 |
void tlb_fill(unsigned long addr, int is_write, int is_user, void *retaddr) |
| 2602 |
{
|
| 2603 |
TranslationBlock *tb; |
| 2604 |
int ret;
|
| 2605 |
unsigned long pc; |
| 2606 |
CPUX86State *saved_env; |
| 2607 |
|
| 2608 |
/* XXX: hack to restore env in all cases, even if not called from
|
| 2609 |
generated code */
|
| 2610 |
saved_env = env; |
| 2611 |
env = cpu_single_env; |
| 2612 |
|
| 2613 |
ret = cpu_x86_handle_mmu_fault(env, addr, is_write, is_user, 1);
|
| 2614 |
if (ret) {
|
| 2615 |
if (retaddr) {
|
| 2616 |
/* now we have a real cpu fault */
|
| 2617 |
pc = (unsigned long)retaddr; |
| 2618 |
tb = tb_find_pc(pc); |
| 2619 |
if (tb) {
|
| 2620 |
/* the PC is inside the translated code. It means that we have
|
| 2621 |
a virtual CPU fault */
|
| 2622 |
cpu_restore_state(tb, env, pc, NULL);
|
| 2623 |
} |
| 2624 |
} |
| 2625 |
if (retaddr)
|
| 2626 |
raise_exception_err(EXCP0E_PAGE, env->error_code); |
| 2627 |
else
|
| 2628 |
raise_exception_err_norestore(EXCP0E_PAGE, env->error_code); |
| 2629 |
} |
| 2630 |
env = saved_env; |
| 2631 |
} |