root / linux-user / vm86.c @ 3ebcc707
History | View | Annotate | Download (14.9 kB)
| 1 |
/*
|
|---|---|
| 2 |
* vm86 linux syscall support
|
| 3 |
*
|
| 4 |
* Copyright (c) 2003 Fabrice Bellard
|
| 5 |
*
|
| 6 |
* This program is free software; you can redistribute it and/or modify
|
| 7 |
* it under the terms of the GNU General Public License as published by
|
| 8 |
* the Free Software Foundation; either version 2 of the License, or
|
| 9 |
* (at your option) any later version.
|
| 10 |
*
|
| 11 |
* This program 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
|
| 14 |
* GNU General Public License for more details.
|
| 15 |
*
|
| 16 |
* You should have received a copy of the GNU General Public License
|
| 17 |
* along with this program; if not, write to the Free Software
|
| 18 |
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
| 19 |
*/
|
| 20 |
#include <stdlib.h> |
| 21 |
#include <stdio.h> |
| 22 |
#include <stdarg.h> |
| 23 |
#include <string.h> |
| 24 |
#include <errno.h> |
| 25 |
#include <unistd.h> |
| 26 |
|
| 27 |
#include "qemu.h" |
| 28 |
|
| 29 |
//#define DEBUG_VM86
|
| 30 |
|
| 31 |
#define set_flags(X,new,mask) \
|
| 32 |
((X) = ((X) & ~(mask)) | ((new) & (mask))) |
| 33 |
|
| 34 |
#define SAFE_MASK (0xDD5) |
| 35 |
#define RETURN_MASK (0xDFF) |
| 36 |
|
| 37 |
static inline int is_revectored(int nr, struct target_revectored_struct *bitmap) |
| 38 |
{
|
| 39 |
return (((uint8_t *)bitmap)[nr >> 3] >> (nr & 7)) & 1; |
| 40 |
} |
| 41 |
|
| 42 |
static inline void vm_putw(uint8_t *segptr, unsigned int reg16, unsigned int val) |
| 43 |
{
|
| 44 |
*(uint16_t *)(segptr + (reg16 & 0xffff)) = tswap16(val);
|
| 45 |
} |
| 46 |
|
| 47 |
static inline void vm_putl(uint8_t *segptr, unsigned int reg16, unsigned int val) |
| 48 |
{
|
| 49 |
*(uint32_t *)(segptr + (reg16 & 0xffff)) = tswap32(val);
|
| 50 |
} |
| 51 |
|
| 52 |
static inline unsigned int vm_getw(uint8_t *segptr, unsigned int reg16) |
| 53 |
{
|
| 54 |
return tswap16(*(uint16_t *)(segptr + (reg16 & 0xffff))); |
| 55 |
} |
| 56 |
|
| 57 |
static inline unsigned int vm_getl(uint8_t *segptr, unsigned int reg16) |
| 58 |
{
|
| 59 |
return tswap32(*(uint16_t *)(segptr + (reg16 & 0xffff))); |
| 60 |
} |
| 61 |
|
| 62 |
void save_v86_state(CPUX86State *env)
|
| 63 |
{
|
| 64 |
TaskState *ts = env->opaque; |
| 65 |
|
| 66 |
/* put the VM86 registers in the userspace register structure */
|
| 67 |
ts->target_v86->regs.eax = tswap32(env->regs[R_EAX]); |
| 68 |
ts->target_v86->regs.ebx = tswap32(env->regs[R_EBX]); |
| 69 |
ts->target_v86->regs.ecx = tswap32(env->regs[R_ECX]); |
| 70 |
ts->target_v86->regs.edx = tswap32(env->regs[R_EDX]); |
| 71 |
ts->target_v86->regs.esi = tswap32(env->regs[R_ESI]); |
| 72 |
ts->target_v86->regs.edi = tswap32(env->regs[R_EDI]); |
| 73 |
ts->target_v86->regs.ebp = tswap32(env->regs[R_EBP]); |
| 74 |
ts->target_v86->regs.esp = tswap32(env->regs[R_ESP]); |
| 75 |
ts->target_v86->regs.eip = tswap32(env->eip); |
| 76 |
ts->target_v86->regs.cs = tswap16(env->segs[R_CS]); |
| 77 |
ts->target_v86->regs.ss = tswap16(env->segs[R_SS]); |
| 78 |
ts->target_v86->regs.ds = tswap16(env->segs[R_DS]); |
| 79 |
ts->target_v86->regs.es = tswap16(env->segs[R_ES]); |
| 80 |
ts->target_v86->regs.fs = tswap16(env->segs[R_FS]); |
| 81 |
ts->target_v86->regs.gs = tswap16(env->segs[R_GS]); |
| 82 |
set_flags(env->eflags, ts->v86flags, VIF_MASK | ts->v86mask); |
| 83 |
ts->target_v86->regs.eflags = tswap32(env->eflags); |
| 84 |
#ifdef DEBUG_VM86
|
| 85 |
fprintf(logfile, "save_v86_state: eflags=%08x cs:ip=%04x:%04x\n",
|
| 86 |
env->eflags, env->segs[R_CS], env->eip); |
| 87 |
#endif
|
| 88 |
|
| 89 |
/* restore 32 bit registers */
|
| 90 |
env->regs[R_EAX] = ts->vm86_saved_regs.eax; |
| 91 |
env->regs[R_EBX] = ts->vm86_saved_regs.ebx; |
| 92 |
env->regs[R_ECX] = ts->vm86_saved_regs.ecx; |
| 93 |
env->regs[R_EDX] = ts->vm86_saved_regs.edx; |
| 94 |
env->regs[R_ESI] = ts->vm86_saved_regs.esi; |
| 95 |
env->regs[R_EDI] = ts->vm86_saved_regs.edi; |
| 96 |
env->regs[R_EBP] = ts->vm86_saved_regs.ebp; |
| 97 |
env->regs[R_ESP] = ts->vm86_saved_regs.esp; |
| 98 |
env->eflags = ts->vm86_saved_regs.eflags; |
| 99 |
env->eip = ts->vm86_saved_regs.eip; |
| 100 |
|
| 101 |
cpu_x86_load_seg(env, R_CS, ts->vm86_saved_regs.cs); |
| 102 |
cpu_x86_load_seg(env, R_SS, ts->vm86_saved_regs.ss); |
| 103 |
cpu_x86_load_seg(env, R_DS, ts->vm86_saved_regs.ds); |
| 104 |
cpu_x86_load_seg(env, R_ES, ts->vm86_saved_regs.es); |
| 105 |
cpu_x86_load_seg(env, R_FS, ts->vm86_saved_regs.fs); |
| 106 |
cpu_x86_load_seg(env, R_GS, ts->vm86_saved_regs.gs); |
| 107 |
} |
| 108 |
|
| 109 |
/* return from vm86 mode to 32 bit. The vm86() syscall will return
|
| 110 |
'retval' */
|
| 111 |
static inline void return_to_32bit(CPUX86State *env, int retval) |
| 112 |
{
|
| 113 |
#ifdef DEBUG_VM86
|
| 114 |
fprintf(logfile, "return_to_32bit: ret=0x%x\n", retval);
|
| 115 |
#endif
|
| 116 |
save_v86_state(env); |
| 117 |
env->regs[R_EAX] = retval; |
| 118 |
} |
| 119 |
|
| 120 |
static inline int set_IF(CPUX86State *env) |
| 121 |
{
|
| 122 |
TaskState *ts = env->opaque; |
| 123 |
|
| 124 |
ts->v86flags |= VIF_MASK; |
| 125 |
if (ts->v86flags & VIP_MASK) {
|
| 126 |
return_to_32bit(env, TARGET_VM86_STI); |
| 127 |
return 1; |
| 128 |
} |
| 129 |
return 0; |
| 130 |
} |
| 131 |
|
| 132 |
static inline void clear_IF(CPUX86State *env) |
| 133 |
{
|
| 134 |
TaskState *ts = env->opaque; |
| 135 |
|
| 136 |
ts->v86flags &= ~VIF_MASK; |
| 137 |
} |
| 138 |
|
| 139 |
static inline void clear_TF(CPUX86State *env) |
| 140 |
{
|
| 141 |
env->eflags &= ~TF_MASK; |
| 142 |
} |
| 143 |
|
| 144 |
static inline void clear_AC(CPUX86State *env) |
| 145 |
{
|
| 146 |
env->eflags &= ~AC_MASK; |
| 147 |
} |
| 148 |
|
| 149 |
static inline int set_vflags_long(unsigned long eflags, CPUX86State *env) |
| 150 |
{
|
| 151 |
TaskState *ts = env->opaque; |
| 152 |
|
| 153 |
set_flags(ts->v86flags, eflags, ts->v86mask); |
| 154 |
set_flags(env->eflags, eflags, SAFE_MASK); |
| 155 |
if (eflags & IF_MASK)
|
| 156 |
return set_IF(env);
|
| 157 |
else
|
| 158 |
clear_IF(env); |
| 159 |
return 0; |
| 160 |
} |
| 161 |
|
| 162 |
static inline int set_vflags_short(unsigned short flags, CPUX86State *env) |
| 163 |
{
|
| 164 |
TaskState *ts = env->opaque; |
| 165 |
|
| 166 |
set_flags(ts->v86flags, flags, ts->v86mask & 0xffff);
|
| 167 |
set_flags(env->eflags, flags, SAFE_MASK); |
| 168 |
if (flags & IF_MASK)
|
| 169 |
return set_IF(env);
|
| 170 |
else
|
| 171 |
clear_IF(env); |
| 172 |
return 0; |
| 173 |
} |
| 174 |
|
| 175 |
static inline unsigned int get_vflags(CPUX86State *env) |
| 176 |
{
|
| 177 |
TaskState *ts = env->opaque; |
| 178 |
unsigned int flags; |
| 179 |
|
| 180 |
flags = env->eflags & RETURN_MASK; |
| 181 |
if (ts->v86flags & VIF_MASK)
|
| 182 |
flags |= IF_MASK; |
| 183 |
return flags | (ts->v86flags & ts->v86mask);
|
| 184 |
} |
| 185 |
|
| 186 |
#define ADD16(reg, val) reg = (reg & ~0xffff) | ((reg + (val)) & 0xffff) |
| 187 |
|
| 188 |
/* handle VM86 interrupt (NOTE: the CPU core currently does not
|
| 189 |
support TSS interrupt revectoring, so this code is always executed) */
|
| 190 |
static void do_int(CPUX86State *env, int intno) |
| 191 |
{
|
| 192 |
TaskState *ts = env->opaque; |
| 193 |
uint32_t *int_ptr, segoffs; |
| 194 |
uint8_t *ssp; |
| 195 |
unsigned int sp; |
| 196 |
|
| 197 |
if (env->segs[R_CS] == TARGET_BIOSSEG)
|
| 198 |
goto cannot_handle;
|
| 199 |
if (is_revectored(intno, &ts->vm86plus.int_revectored))
|
| 200 |
goto cannot_handle;
|
| 201 |
if (intno == 0x21 && is_revectored((env->regs[R_EAX] >> 8) & 0xff, |
| 202 |
&ts->vm86plus.int21_revectored)) |
| 203 |
goto cannot_handle;
|
| 204 |
int_ptr = (uint32_t *)(intno << 2);
|
| 205 |
segoffs = tswap32(*int_ptr); |
| 206 |
if ((segoffs >> 16) == TARGET_BIOSSEG) |
| 207 |
goto cannot_handle;
|
| 208 |
#if defined(DEBUG_VM86)
|
| 209 |
fprintf(logfile, "VM86: emulating int 0x%x. CS:IP=%04x:%04x\n",
|
| 210 |
intno, segoffs >> 16, segoffs & 0xffff); |
| 211 |
#endif
|
| 212 |
/* save old state */
|
| 213 |
ssp = (uint8_t *)(env->segs[R_SS] << 4);
|
| 214 |
sp = env->regs[R_ESP] & 0xffff;
|
| 215 |
vm_putw(ssp, sp - 2, get_vflags(env));
|
| 216 |
vm_putw(ssp, sp - 4, env->segs[R_CS]);
|
| 217 |
vm_putw(ssp, sp - 6, env->eip);
|
| 218 |
ADD16(env->regs[R_ESP], -6);
|
| 219 |
/* goto interrupt handler */
|
| 220 |
env->eip = segoffs & 0xffff;
|
| 221 |
cpu_x86_load_seg(env, R_CS, segoffs >> 16);
|
| 222 |
clear_TF(env); |
| 223 |
clear_IF(env); |
| 224 |
clear_AC(env); |
| 225 |
return;
|
| 226 |
cannot_handle:
|
| 227 |
#if defined(DEBUG_VM86)
|
| 228 |
fprintf(logfile, "VM86: return to 32 bits int 0x%x\n", intno);
|
| 229 |
#endif
|
| 230 |
return_to_32bit(env, TARGET_VM86_INTx | (intno << 8));
|
| 231 |
} |
| 232 |
|
| 233 |
void handle_vm86_trap(CPUX86State *env, int trapno) |
| 234 |
{
|
| 235 |
if (trapno == 1 || trapno == 3) { |
| 236 |
return_to_32bit(env, TARGET_VM86_TRAP + (trapno << 8));
|
| 237 |
} else {
|
| 238 |
do_int(env, trapno); |
| 239 |
} |
| 240 |
} |
| 241 |
|
| 242 |
#define CHECK_IF_IN_TRAP() \
|
| 243 |
if ((ts->vm86plus.vm86plus.flags & TARGET_vm86dbg_active) && \
|
| 244 |
(ts->vm86plus.vm86plus.flags & TARGET_vm86dbg_TFpendig)) \ |
| 245 |
newflags |= TF_MASK |
| 246 |
|
| 247 |
#define VM86_FAULT_RETURN \
|
| 248 |
if ((ts->vm86plus.vm86plus.flags & TARGET_force_return_for_pic) && \
|
| 249 |
(ts->v86flags & (IF_MASK | VIF_MASK))) \ |
| 250 |
return_to_32bit(env, TARGET_VM86_PICRETURN); \ |
| 251 |
return
|
| 252 |
|
| 253 |
void handle_vm86_fault(CPUX86State *env)
|
| 254 |
{
|
| 255 |
TaskState *ts = env->opaque; |
| 256 |
uint8_t *csp, *pc, *ssp; |
| 257 |
unsigned int ip, sp, newflags, newip, newcs, opcode, intno; |
| 258 |
int data32, pref_done;
|
| 259 |
|
| 260 |
csp = (uint8_t *)(env->segs[R_CS] << 4);
|
| 261 |
ip = env->eip & 0xffff;
|
| 262 |
pc = csp + ip; |
| 263 |
|
| 264 |
ssp = (uint8_t *)(env->segs[R_SS] << 4);
|
| 265 |
sp = env->regs[R_ESP] & 0xffff;
|
| 266 |
|
| 267 |
#if defined(DEBUG_VM86)
|
| 268 |
fprintf(logfile, "VM86 exception %04x:%08x %02x %02x\n",
|
| 269 |
env->segs[R_CS], env->eip, pc[0], pc[1]); |
| 270 |
#endif
|
| 271 |
|
| 272 |
data32 = 0;
|
| 273 |
pref_done = 0;
|
| 274 |
do {
|
| 275 |
opcode = csp[ip]; |
| 276 |
ADD16(ip, 1);
|
| 277 |
switch (opcode) {
|
| 278 |
case 0x66: /* 32-bit data */ data32=1; break; |
| 279 |
case 0x67: /* 32-bit address */ break; |
| 280 |
case 0x2e: /* CS */ break; |
| 281 |
case 0x3e: /* DS */ break; |
| 282 |
case 0x26: /* ES */ break; |
| 283 |
case 0x36: /* SS */ break; |
| 284 |
case 0x65: /* GS */ break; |
| 285 |
case 0x64: /* FS */ break; |
| 286 |
case 0xf2: /* repnz */ break; |
| 287 |
case 0xf3: /* rep */ break; |
| 288 |
default: pref_done = 1; |
| 289 |
} |
| 290 |
} while (!pref_done);
|
| 291 |
|
| 292 |
/* VM86 mode */
|
| 293 |
switch(opcode) {
|
| 294 |
case 0x9c: /* pushf */ |
| 295 |
if (data32) {
|
| 296 |
vm_putl(ssp, sp - 4, get_vflags(env));
|
| 297 |
ADD16(env->regs[R_ESP], -4);
|
| 298 |
} else {
|
| 299 |
vm_putw(ssp, sp - 2, get_vflags(env));
|
| 300 |
ADD16(env->regs[R_ESP], -2);
|
| 301 |
} |
| 302 |
env->eip = ip; |
| 303 |
VM86_FAULT_RETURN; |
| 304 |
|
| 305 |
case 0x9d: /* popf */ |
| 306 |
if (data32) {
|
| 307 |
newflags = vm_getl(ssp, sp); |
| 308 |
ADD16(env->regs[R_ESP], 4);
|
| 309 |
} else {
|
| 310 |
newflags = vm_getw(ssp, sp); |
| 311 |
ADD16(env->regs[R_ESP], 2);
|
| 312 |
} |
| 313 |
env->eip = ip; |
| 314 |
CHECK_IF_IN_TRAP(); |
| 315 |
if (data32) {
|
| 316 |
if (set_vflags_long(newflags, env))
|
| 317 |
return;
|
| 318 |
} else {
|
| 319 |
if (set_vflags_short(newflags, env))
|
| 320 |
return;
|
| 321 |
} |
| 322 |
VM86_FAULT_RETURN; |
| 323 |
|
| 324 |
case 0xcd: /* int */ |
| 325 |
intno = csp[ip]; |
| 326 |
ADD16(ip, 1);
|
| 327 |
env->eip = ip; |
| 328 |
if (ts->vm86plus.vm86plus.flags & TARGET_vm86dbg_active) {
|
| 329 |
if ( (ts->vm86plus.vm86plus.vm86dbg_intxxtab[intno >> 3] >> |
| 330 |
(intno &7)) & 1) { |
| 331 |
return_to_32bit(env, TARGET_VM86_INTx + (intno << 8));
|
| 332 |
return;
|
| 333 |
} |
| 334 |
} |
| 335 |
do_int(env, intno); |
| 336 |
break;
|
| 337 |
|
| 338 |
case 0xcf: /* iret */ |
| 339 |
if (data32) {
|
| 340 |
newip = vm_getl(ssp, sp) & 0xffff;
|
| 341 |
newcs = vm_getl(ssp, sp + 4) & 0xffff; |
| 342 |
newflags = vm_getl(ssp, sp + 8);
|
| 343 |
ADD16(env->regs[R_ESP], 12);
|
| 344 |
} else {
|
| 345 |
newip = vm_getw(ssp, sp); |
| 346 |
newcs = vm_getw(ssp, sp + 2);
|
| 347 |
newflags = vm_getw(ssp, sp + 4);
|
| 348 |
ADD16(env->regs[R_ESP], 6);
|
| 349 |
} |
| 350 |
env->eip = newip; |
| 351 |
cpu_x86_load_seg(env, R_CS, newcs); |
| 352 |
CHECK_IF_IN_TRAP(); |
| 353 |
if (data32) {
|
| 354 |
if (set_vflags_long(newflags, env))
|
| 355 |
return;
|
| 356 |
} else {
|
| 357 |
if (set_vflags_short(newflags, env))
|
| 358 |
return;
|
| 359 |
} |
| 360 |
VM86_FAULT_RETURN; |
| 361 |
|
| 362 |
case 0xfa: /* cli */ |
| 363 |
env->eip = ip; |
| 364 |
clear_IF(env); |
| 365 |
VM86_FAULT_RETURN; |
| 366 |
|
| 367 |
case 0xfb: /* sti */ |
| 368 |
env->eip = ip; |
| 369 |
if (set_IF(env))
|
| 370 |
return;
|
| 371 |
VM86_FAULT_RETURN; |
| 372 |
|
| 373 |
default:
|
| 374 |
/* real VM86 GPF exception */
|
| 375 |
return_to_32bit(env, TARGET_VM86_UNKNOWN); |
| 376 |
break;
|
| 377 |
} |
| 378 |
} |
| 379 |
|
| 380 |
int do_vm86(CPUX86State *env, long subfunction, |
| 381 |
struct target_vm86plus_struct * target_v86)
|
| 382 |
{
|
| 383 |
TaskState *ts = env->opaque; |
| 384 |
int ret;
|
| 385 |
|
| 386 |
switch (subfunction) {
|
| 387 |
case TARGET_VM86_REQUEST_IRQ:
|
| 388 |
case TARGET_VM86_FREE_IRQ:
|
| 389 |
case TARGET_VM86_GET_IRQ_BITS:
|
| 390 |
case TARGET_VM86_GET_AND_RESET_IRQ:
|
| 391 |
gemu_log("qemu: unsupported vm86 subfunction (%ld)\n", subfunction);
|
| 392 |
ret = -EINVAL; |
| 393 |
goto out;
|
| 394 |
case TARGET_VM86_PLUS_INSTALL_CHECK:
|
| 395 |
/* NOTE: on old vm86 stuff this will return the error
|
| 396 |
from verify_area(), because the subfunction is
|
| 397 |
interpreted as (invalid) address to vm86_struct.
|
| 398 |
So the installation check works.
|
| 399 |
*/
|
| 400 |
ret = 0;
|
| 401 |
goto out;
|
| 402 |
} |
| 403 |
|
| 404 |
ts->target_v86 = target_v86; |
| 405 |
/* save current CPU regs */
|
| 406 |
ts->vm86_saved_regs.eax = 0; /* default vm86 syscall return code */ |
| 407 |
ts->vm86_saved_regs.ebx = env->regs[R_EBX]; |
| 408 |
ts->vm86_saved_regs.ecx = env->regs[R_ECX]; |
| 409 |
ts->vm86_saved_regs.edx = env->regs[R_EDX]; |
| 410 |
ts->vm86_saved_regs.esi = env->regs[R_ESI]; |
| 411 |
ts->vm86_saved_regs.edi = env->regs[R_EDI]; |
| 412 |
ts->vm86_saved_regs.ebp = env->regs[R_EBP]; |
| 413 |
ts->vm86_saved_regs.esp = env->regs[R_ESP]; |
| 414 |
ts->vm86_saved_regs.eflags = env->eflags; |
| 415 |
ts->vm86_saved_regs.eip = env->eip; |
| 416 |
ts->vm86_saved_regs.cs = env->segs[R_CS]; |
| 417 |
ts->vm86_saved_regs.ss = env->segs[R_SS]; |
| 418 |
ts->vm86_saved_regs.ds = env->segs[R_DS]; |
| 419 |
ts->vm86_saved_regs.es = env->segs[R_ES]; |
| 420 |
ts->vm86_saved_regs.fs = env->segs[R_FS]; |
| 421 |
ts->vm86_saved_regs.gs = env->segs[R_GS]; |
| 422 |
|
| 423 |
/* build vm86 CPU state */
|
| 424 |
ts->v86flags = tswap32(target_v86->regs.eflags); |
| 425 |
env->eflags = (env->eflags & ~SAFE_MASK) | |
| 426 |
(tswap32(target_v86->regs.eflags) & SAFE_MASK) | VM_MASK; |
| 427 |
|
| 428 |
ts->vm86plus.cpu_type = tswapl(target_v86->cpu_type); |
| 429 |
switch (ts->vm86plus.cpu_type) {
|
| 430 |
case TARGET_CPU_286:
|
| 431 |
ts->v86mask = 0;
|
| 432 |
break;
|
| 433 |
case TARGET_CPU_386:
|
| 434 |
ts->v86mask = NT_MASK | IOPL_MASK; |
| 435 |
break;
|
| 436 |
case TARGET_CPU_486:
|
| 437 |
ts->v86mask = AC_MASK | NT_MASK | IOPL_MASK; |
| 438 |
break;
|
| 439 |
default:
|
| 440 |
ts->v86mask = ID_MASK | AC_MASK | NT_MASK | IOPL_MASK; |
| 441 |
break;
|
| 442 |
} |
| 443 |
|
| 444 |
env->regs[R_EBX] = tswap32(target_v86->regs.ebx); |
| 445 |
env->regs[R_ECX] = tswap32(target_v86->regs.ecx); |
| 446 |
env->regs[R_EDX] = tswap32(target_v86->regs.edx); |
| 447 |
env->regs[R_ESI] = tswap32(target_v86->regs.esi); |
| 448 |
env->regs[R_EDI] = tswap32(target_v86->regs.edi); |
| 449 |
env->regs[R_EBP] = tswap32(target_v86->regs.ebp); |
| 450 |
env->regs[R_ESP] = tswap32(target_v86->regs.esp); |
| 451 |
env->eip = tswap32(target_v86->regs.eip); |
| 452 |
cpu_x86_load_seg(env, R_CS, tswap16(target_v86->regs.cs)); |
| 453 |
cpu_x86_load_seg(env, R_SS, tswap16(target_v86->regs.ss)); |
| 454 |
cpu_x86_load_seg(env, R_DS, tswap16(target_v86->regs.ds)); |
| 455 |
cpu_x86_load_seg(env, R_ES, tswap16(target_v86->regs.es)); |
| 456 |
cpu_x86_load_seg(env, R_FS, tswap16(target_v86->regs.fs)); |
| 457 |
cpu_x86_load_seg(env, R_GS, tswap16(target_v86->regs.gs)); |
| 458 |
ret = tswap32(target_v86->regs.eax); /* eax will be restored at
|
| 459 |
the end of the syscall */
|
| 460 |
memcpy(&ts->vm86plus.int_revectored, |
| 461 |
&target_v86->int_revectored, 32);
|
| 462 |
memcpy(&ts->vm86plus.int21_revectored, |
| 463 |
&target_v86->int21_revectored, 32);
|
| 464 |
ts->vm86plus.vm86plus.flags = tswapl(target_v86->vm86plus.flags); |
| 465 |
memcpy(&ts->vm86plus.vm86plus.vm86dbg_intxxtab, |
| 466 |
target_v86->vm86plus.vm86dbg_intxxtab, 32);
|
| 467 |
|
| 468 |
#ifdef DEBUG_VM86
|
| 469 |
fprintf(logfile, "do_vm86: cs:ip=%04x:%04x\n", env->segs[R_CS], env->eip);
|
| 470 |
#endif
|
| 471 |
/* now the virtual CPU is ready for vm86 execution ! */
|
| 472 |
out:
|
| 473 |
return ret;
|
| 474 |
} |
| 475 |
|