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/*
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* i386 helpers
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*
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* Copyright (c) 2003 Fabrice Bellard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
|
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* License as published by the Free Software Foundation; either
|
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "exec.h" |
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|
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const uint8_t parity_table[256] = { |
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CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
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0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
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0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
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CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
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0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
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CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
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CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
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0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
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0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
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CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
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CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
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0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
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CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
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0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
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0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
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CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
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0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
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CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
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CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
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0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
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CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
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0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
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0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
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CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
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CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
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0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
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0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
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CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
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0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
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CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
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CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, |
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0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, |
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}; |
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|
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/* modulo 17 table */
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const uint8_t rclw_table[32] = { |
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0, 1, 2, 3, 4, 5, 6, 7, |
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8, 9,10,11,12,13,14,15, |
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16, 0, 1, 2, 3, 4, 5, 6, |
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7, 8, 9,10,11,12,13,14, |
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}; |
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|
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/* modulo 9 table */
|
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const uint8_t rclb_table[32] = { |
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0, 1, 2, 3, 4, 5, 6, 7, |
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8, 0, 1, 2, 3, 4, 5, 6, |
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7, 8, 0, 1, 2, 3, 4, 5, |
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6, 7, 8, 0, 1, 2, 3, 4, |
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}; |
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|
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const CPU86_LDouble f15rk[7] = |
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{
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0.00000000000000000000L, |
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1.00000000000000000000L, |
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3.14159265358979323851L, /*pi*/ |
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0.30102999566398119523L, /*lg2*/ |
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0.69314718055994530943L, /*ln2*/ |
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1.44269504088896340739L, /*l2e*/ |
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3.32192809488736234781L, /*l2t*/ |
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}; |
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|
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/* thread support */
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|
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spinlock_t global_cpu_lock = SPIN_LOCK_UNLOCKED; |
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|
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void cpu_lock(void) |
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{
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spin_lock(&global_cpu_lock); |
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} |
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|
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void cpu_unlock(void) |
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{
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spin_unlock(&global_cpu_lock); |
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} |
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|
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void cpu_loop_exit(void) |
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{
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/* NOTE: the register at this point must be saved by hand because
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longjmp restore them */
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#ifdef reg_EAX
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env->regs[R_EAX] = EAX; |
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#endif
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#ifdef reg_ECX
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env->regs[R_ECX] = ECX; |
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#endif
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#ifdef reg_EDX
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env->regs[R_EDX] = EDX; |
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#endif
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#ifdef reg_EBX
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env->regs[R_EBX] = EBX; |
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#endif
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#ifdef reg_ESP
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env->regs[R_ESP] = ESP; |
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#endif
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#ifdef reg_EBP
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env->regs[R_EBP] = EBP; |
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#endif
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#ifdef reg_ESI
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env->regs[R_ESI] = ESI; |
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#endif
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#ifdef reg_EDI
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env->regs[R_EDI] = EDI; |
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#endif
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longjmp(env->jmp_env, 1);
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} |
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|
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/* return non zero if error */
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static inline int load_segment(uint32_t *e1_ptr, uint32_t *e2_ptr, |
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int selector)
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{
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SegmentCache *dt; |
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int index;
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uint8_t *ptr; |
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|
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if (selector & 0x4) |
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dt = &env->ldt; |
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else
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dt = &env->gdt; |
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index = selector & ~7;
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if ((index + 7) > dt->limit) |
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return -1; |
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ptr = dt->base + index; |
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*e1_ptr = ldl_kernel(ptr); |
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*e2_ptr = ldl_kernel(ptr + 4);
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return 0; |
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} |
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|
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static inline unsigned int get_seg_limit(uint32_t e1, uint32_t e2) |
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{
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unsigned int limit; |
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limit = (e1 & 0xffff) | (e2 & 0x000f0000); |
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if (e2 & DESC_G_MASK)
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limit = (limit << 12) | 0xfff; |
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return limit;
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} |
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|
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static inline uint8_t *get_seg_base(uint32_t e1, uint32_t e2) |
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{
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return (uint8_t *)((e1 >> 16) | ((e2 & 0xff) << 16) | (e2 & 0xff000000)); |
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} |
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|
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static inline void load_seg_cache_raw_dt(SegmentCache *sc, uint32_t e1, uint32_t e2) |
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{
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sc->base = get_seg_base(e1, e2); |
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sc->limit = get_seg_limit(e1, e2); |
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sc->flags = e2; |
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} |
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|
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/* init the segment cache in vm86 mode. */
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static inline void load_seg_vm(int seg, int selector) |
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{
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selector &= 0xffff;
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cpu_x86_load_seg_cache(env, seg, selector, |
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(uint8_t *)(selector << 4), 0xffff, 0); |
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} |
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|
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static inline void get_ss_esp_from_tss(uint32_t *ss_ptr, |
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uint32_t *esp_ptr, int dpl)
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{
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int type, index, shift;
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|
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#if 0
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{
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int i;
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printf("TR: base=%p limit=%x\n", env->tr.base, env->tr.limit);
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for(i=0;i<env->tr.limit;i++) {
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printf("%02x ", env->tr.base[i]);
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if ((i & 7) == 7) printf("\n");
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}
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printf("\n");
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}
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#endif
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if (!(env->tr.flags & DESC_P_MASK))
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cpu_abort(env, "invalid tss");
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type = (env->tr.flags >> DESC_TYPE_SHIFT) & 0xf;
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if ((type & 7) != 1) |
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cpu_abort(env, "invalid tss type");
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shift = type >> 3;
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index = (dpl * 4 + 2) << shift; |
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if (index + (4 << shift) - 1 > env->tr.limit) |
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raise_exception_err(EXCP0A_TSS, env->tr.selector & 0xfffc);
|
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if (shift == 0) { |
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*esp_ptr = lduw_kernel(env->tr.base + index); |
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*ss_ptr = lduw_kernel(env->tr.base + index + 2);
|
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} else {
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*esp_ptr = ldl_kernel(env->tr.base + index); |
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*ss_ptr = lduw_kernel(env->tr.base + index + 4);
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} |
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} |
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|
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/* XXX: merge with load_seg() */
|
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static void tss_load_seg(int seg_reg, int selector) |
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{
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uint32_t e1, e2; |
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int rpl, dpl, cpl;
|
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|
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if ((selector & 0xfffc) != 0) { |
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if (load_segment(&e1, &e2, selector) != 0) |
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raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
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if (!(e2 & DESC_S_MASK))
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raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
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rpl = selector & 3;
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dpl = (e2 >> DESC_DPL_SHIFT) & 3;
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cpl = env->hflags & HF_CPL_MASK; |
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if (seg_reg == R_CS) {
|
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if (!(e2 & DESC_CS_MASK))
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raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
|
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if (dpl != rpl)
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raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
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if ((e2 & DESC_C_MASK) && dpl > rpl)
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raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
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|
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} else if (seg_reg == R_SS) { |
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/* SS must be writable data */
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if ((e2 & DESC_CS_MASK) || !(e2 & DESC_W_MASK))
|
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raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
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if (dpl != cpl || dpl != rpl)
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raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
|
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} else {
|
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/* not readable code */
|
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if ((e2 & DESC_CS_MASK) && !(e2 & DESC_R_MASK))
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raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
|
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/* if data or non conforming code, checks the rights */
|
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if (((e2 >> DESC_TYPE_SHIFT) & 0xf) < 12) { |
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if (dpl < cpl || dpl < rpl)
|
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raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
|
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} |
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} |
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if (!(e2 & DESC_P_MASK))
|
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raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc);
|
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cpu_x86_load_seg_cache(env, seg_reg, selector, |
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get_seg_base(e1, e2), |
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get_seg_limit(e1, e2), |
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e2); |
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} else {
|
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if (seg_reg == R_SS || seg_reg == R_CS)
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raise_exception_err(EXCP0A_TSS, selector & 0xfffc);
|
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} |
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} |
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|
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#define SWITCH_TSS_JMP 0 |
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#define SWITCH_TSS_IRET 1 |
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#define SWITCH_TSS_CALL 2 |
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|
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/* XXX: restore CPU state in registers (PowerPC case) */
|
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static void switch_tss(int tss_selector, |
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uint32_t e1, uint32_t e2, int source)
|
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{
|
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int tss_limit, tss_limit_max, type, old_tss_limit_max, old_type, v1, v2, i;
|
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uint8_t *tss_base; |
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uint32_t new_regs[8], new_segs[6]; |
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uint32_t new_eflags, new_eip, new_cr3, new_ldt, new_trap; |
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uint32_t old_eflags, eflags_mask; |
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SegmentCache *dt; |
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int index;
|
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uint8_t *ptr; |
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|
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type = (e2 >> DESC_TYPE_SHIFT) & 0xf;
|
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|
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/* if task gate, we read the TSS segment and we load it */
|
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if (type == 5) { |
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if (!(e2 & DESC_P_MASK))
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raise_exception_err(EXCP0B_NOSEG, tss_selector & 0xfffc);
|
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tss_selector = e1 >> 16;
|
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if (tss_selector & 4) |
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raise_exception_err(EXCP0A_TSS, tss_selector & 0xfffc);
|
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if (load_segment(&e1, &e2, tss_selector) != 0) |
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raise_exception_err(EXCP0D_GPF, tss_selector & 0xfffc);
|
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if (e2 & DESC_S_MASK)
|
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raise_exception_err(EXCP0D_GPF, tss_selector & 0xfffc);
|
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type = (e2 >> DESC_TYPE_SHIFT) & 0xf;
|
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if ((type & 7) != 1) |
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raise_exception_err(EXCP0D_GPF, tss_selector & 0xfffc);
|
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} |
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|
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if (!(e2 & DESC_P_MASK))
|
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raise_exception_err(EXCP0B_NOSEG, tss_selector & 0xfffc);
|
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|
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if (type & 8) |
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tss_limit_max = 103;
|
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else
|
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tss_limit_max = 43;
|
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tss_limit = get_seg_limit(e1, e2); |
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tss_base = get_seg_base(e1, e2); |
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if ((tss_selector & 4) != 0 || |
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tss_limit < tss_limit_max) |
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raise_exception_err(EXCP0A_TSS, tss_selector & 0xfffc);
|
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old_type = (env->tr.flags >> DESC_TYPE_SHIFT) & 0xf;
|
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if (old_type & 8) |
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old_tss_limit_max = 103;
|
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else
|
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old_tss_limit_max = 43;
|
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|
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/* read all the registers from the new TSS */
|
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if (type & 8) { |
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/* 32 bit */
|
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new_cr3 = ldl_kernel(tss_base + 0x1c);
|
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new_eip = ldl_kernel(tss_base + 0x20);
|
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new_eflags = ldl_kernel(tss_base + 0x24);
|
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for(i = 0; i < 8; i++) |
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new_regs[i] = ldl_kernel(tss_base + (0x28 + i * 4)); |
| 325 |
for(i = 0; i < 6; i++) |
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new_segs[i] = lduw_kernel(tss_base + (0x48 + i * 4)); |
| 327 |
new_ldt = lduw_kernel(tss_base + 0x60);
|
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new_trap = ldl_kernel(tss_base + 0x64);
|
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} else {
|
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/* 16 bit */
|
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new_cr3 = 0;
|
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new_eip = lduw_kernel(tss_base + 0x0e);
|
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new_eflags = lduw_kernel(tss_base + 0x10);
|
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for(i = 0; i < 8; i++) |
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new_regs[i] = lduw_kernel(tss_base + (0x12 + i * 2)) | 0xffff0000; |
| 336 |
for(i = 0; i < 4; i++) |
| 337 |
new_segs[i] = lduw_kernel(tss_base + (0x22 + i * 4)); |
| 338 |
new_ldt = lduw_kernel(tss_base + 0x2a);
|
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new_segs[R_FS] = 0;
|
| 340 |
new_segs[R_GS] = 0;
|
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new_trap = 0;
|
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} |
| 343 |
|
| 344 |
/* NOTE: we must avoid memory exceptions during the task switch,
|
| 345 |
so we make dummy accesses before */
|
| 346 |
/* XXX: it can still fail in some cases, so a bigger hack is
|
| 347 |
necessary to valid the TLB after having done the accesses */
|
| 348 |
|
| 349 |
v1 = ldub_kernel(env->tr.base); |
| 350 |
v2 = ldub(env->tr.base + old_tss_limit_max); |
| 351 |
stb_kernel(env->tr.base, v1); |
| 352 |
stb_kernel(env->tr.base + old_tss_limit_max, v2); |
| 353 |
|
| 354 |
/* clear busy bit (it is restartable) */
|
| 355 |
if (source == SWITCH_TSS_JMP || source == SWITCH_TSS_IRET) {
|
| 356 |
uint8_t *ptr; |
| 357 |
uint32_t e2; |
| 358 |
ptr = env->gdt.base + (env->tr.selector << 3);
|
| 359 |
e2 = ldl_kernel(ptr + 4);
|
| 360 |
e2 &= ~DESC_TSS_BUSY_MASK; |
| 361 |
stl_kernel(ptr + 4, e2);
|
| 362 |
} |
| 363 |
old_eflags = compute_eflags(); |
| 364 |
if (source == SWITCH_TSS_IRET)
|
| 365 |
old_eflags &= ~NT_MASK; |
| 366 |
|
| 367 |
/* save the current state in the old TSS */
|
| 368 |
if (type & 8) { |
| 369 |
/* 32 bit */
|
| 370 |
stl_kernel(env->tr.base + 0x20, env->eip);
|
| 371 |
stl_kernel(env->tr.base + 0x24, old_eflags);
|
| 372 |
for(i = 0; i < 8; i++) |
| 373 |
stl_kernel(env->tr.base + (0x28 + i * 4), env->regs[i]); |
| 374 |
for(i = 0; i < 6; i++) |
| 375 |
stw_kernel(env->tr.base + (0x48 + i * 4), env->segs[i].selector); |
| 376 |
} else {
|
| 377 |
/* 16 bit */
|
| 378 |
stw_kernel(env->tr.base + 0x0e, new_eip);
|
| 379 |
stw_kernel(env->tr.base + 0x10, old_eflags);
|
| 380 |
for(i = 0; i < 8; i++) |
| 381 |
stw_kernel(env->tr.base + (0x12 + i * 2), env->regs[i]); |
| 382 |
for(i = 0; i < 4; i++) |
| 383 |
stw_kernel(env->tr.base + (0x22 + i * 4), env->segs[i].selector); |
| 384 |
} |
| 385 |
|
| 386 |
/* now if an exception occurs, it will occurs in the next task
|
| 387 |
context */
|
| 388 |
|
| 389 |
if (source == SWITCH_TSS_CALL) {
|
| 390 |
stw_kernel(tss_base, env->tr.selector); |
| 391 |
new_eflags |= NT_MASK; |
| 392 |
} |
| 393 |
|
| 394 |
/* set busy bit */
|
| 395 |
if (source == SWITCH_TSS_JMP || source == SWITCH_TSS_CALL) {
|
| 396 |
uint8_t *ptr; |
| 397 |
uint32_t e2; |
| 398 |
ptr = env->gdt.base + (tss_selector << 3);
|
| 399 |
e2 = ldl_kernel(ptr + 4);
|
| 400 |
e2 |= DESC_TSS_BUSY_MASK; |
| 401 |
stl_kernel(ptr + 4, e2);
|
| 402 |
} |
| 403 |
|
| 404 |
/* set the new CPU state */
|
| 405 |
/* from this point, any exception which occurs can give problems */
|
| 406 |
env->cr[0] |= CR0_TS_MASK;
|
| 407 |
env->tr.selector = tss_selector; |
| 408 |
env->tr.base = tss_base; |
| 409 |
env->tr.limit = tss_limit; |
| 410 |
env->tr.flags = e2 & ~DESC_TSS_BUSY_MASK; |
| 411 |
|
| 412 |
if ((type & 8) && (env->cr[0] & CR0_PG_MASK)) { |
| 413 |
env->cr[3] = new_cr3;
|
| 414 |
cpu_x86_update_cr3(env); |
| 415 |
} |
| 416 |
|
| 417 |
/* load all registers without an exception, then reload them with
|
| 418 |
possible exception */
|
| 419 |
env->eip = new_eip; |
| 420 |
eflags_mask = FL_UPDATE_CPL0_MASK; |
| 421 |
if (!(type & 8)) |
| 422 |
eflags_mask &= 0xffff;
|
| 423 |
load_eflags(new_eflags, eflags_mask); |
| 424 |
for(i = 0; i < 8; i++) |
| 425 |
env->regs[i] = new_regs[i]; |
| 426 |
if (new_eflags & VM_MASK) {
|
| 427 |
for(i = 0; i < 6; i++) |
| 428 |
load_seg_vm(i, new_segs[i]); |
| 429 |
/* in vm86, CPL is always 3 */
|
| 430 |
cpu_x86_set_cpl(env, 3);
|
| 431 |
} else {
|
| 432 |
/* CPL is set the RPL of CS */
|
| 433 |
cpu_x86_set_cpl(env, new_segs[R_CS] & 3);
|
| 434 |
/* first just selectors as the rest may trigger exceptions */
|
| 435 |
for(i = 0; i < 6; i++) |
| 436 |
cpu_x86_load_seg_cache(env, i, new_segs[i], NULL, 0, 0); |
| 437 |
} |
| 438 |
|
| 439 |
env->ldt.selector = new_ldt & ~4;
|
| 440 |
env->ldt.base = NULL;
|
| 441 |
env->ldt.limit = 0;
|
| 442 |
env->ldt.flags = 0;
|
| 443 |
|
| 444 |
/* load the LDT */
|
| 445 |
if (new_ldt & 4) |
| 446 |
raise_exception_err(EXCP0A_TSS, new_ldt & 0xfffc);
|
| 447 |
|
| 448 |
dt = &env->gdt; |
| 449 |
index = new_ldt & ~7;
|
| 450 |
if ((index + 7) > dt->limit) |
| 451 |
raise_exception_err(EXCP0A_TSS, new_ldt & 0xfffc);
|
| 452 |
ptr = dt->base + index; |
| 453 |
e1 = ldl_kernel(ptr); |
| 454 |
e2 = ldl_kernel(ptr + 4);
|
| 455 |
if ((e2 & DESC_S_MASK) || ((e2 >> DESC_TYPE_SHIFT) & 0xf) != 2) |
| 456 |
raise_exception_err(EXCP0A_TSS, new_ldt & 0xfffc);
|
| 457 |
if (!(e2 & DESC_P_MASK))
|
| 458 |
raise_exception_err(EXCP0A_TSS, new_ldt & 0xfffc);
|
| 459 |
load_seg_cache_raw_dt(&env->ldt, e1, e2); |
| 460 |
|
| 461 |
/* load the segments */
|
| 462 |
if (!(new_eflags & VM_MASK)) {
|
| 463 |
tss_load_seg(R_CS, new_segs[R_CS]); |
| 464 |
tss_load_seg(R_SS, new_segs[R_SS]); |
| 465 |
tss_load_seg(R_ES, new_segs[R_ES]); |
| 466 |
tss_load_seg(R_DS, new_segs[R_DS]); |
| 467 |
tss_load_seg(R_FS, new_segs[R_FS]); |
| 468 |
tss_load_seg(R_GS, new_segs[R_GS]); |
| 469 |
} |
| 470 |
|
| 471 |
/* check that EIP is in the CS segment limits */
|
| 472 |
if (new_eip > env->segs[R_CS].limit) {
|
| 473 |
raise_exception_err(EXCP0D_GPF, 0);
|
| 474 |
} |
| 475 |
} |
| 476 |
|
| 477 |
/* check if Port I/O is allowed in TSS */
|
| 478 |
static inline void check_io(int addr, int size) |
| 479 |
{
|
| 480 |
int io_offset, val, mask;
|
| 481 |
|
| 482 |
/* TSS must be a valid 32 bit one */
|
| 483 |
if (!(env->tr.flags & DESC_P_MASK) ||
|
| 484 |
((env->tr.flags >> DESC_TYPE_SHIFT) & 0xf) != 9 || |
| 485 |
env->tr.limit < 103)
|
| 486 |
goto fail;
|
| 487 |
io_offset = lduw_kernel(env->tr.base + 0x66);
|
| 488 |
io_offset += (addr >> 3);
|
| 489 |
/* Note: the check needs two bytes */
|
| 490 |
if ((io_offset + 1) > env->tr.limit) |
| 491 |
goto fail;
|
| 492 |
val = lduw_kernel(env->tr.base + io_offset); |
| 493 |
val >>= (addr & 7);
|
| 494 |
mask = (1 << size) - 1; |
| 495 |
/* all bits must be zero to allow the I/O */
|
| 496 |
if ((val & mask) != 0) { |
| 497 |
fail:
|
| 498 |
raise_exception_err(EXCP0D_GPF, 0);
|
| 499 |
} |
| 500 |
} |
| 501 |
|
| 502 |
void check_iob_T0(void) |
| 503 |
{
|
| 504 |
check_io(T0, 1);
|
| 505 |
} |
| 506 |
|
| 507 |
void check_iow_T0(void) |
| 508 |
{
|
| 509 |
check_io(T0, 2);
|
| 510 |
} |
| 511 |
|
| 512 |
void check_iol_T0(void) |
| 513 |
{
|
| 514 |
check_io(T0, 4);
|
| 515 |
} |
| 516 |
|
| 517 |
void check_iob_DX(void) |
| 518 |
{
|
| 519 |
check_io(EDX & 0xffff, 1); |
| 520 |
} |
| 521 |
|
| 522 |
void check_iow_DX(void) |
| 523 |
{
|
| 524 |
check_io(EDX & 0xffff, 2); |
| 525 |
} |
| 526 |
|
| 527 |
void check_iol_DX(void) |
| 528 |
{
|
| 529 |
check_io(EDX & 0xffff, 4); |
| 530 |
} |
| 531 |
|
| 532 |
/* protected mode interrupt */
|
| 533 |
static void do_interrupt_protected(int intno, int is_int, int error_code, |
| 534 |
unsigned int next_eip, int is_hw) |
| 535 |
{
|
| 536 |
SegmentCache *dt; |
| 537 |
uint8_t *ptr, *ssp; |
| 538 |
int type, dpl, selector, ss_dpl, cpl;
|
| 539 |
int has_error_code, new_stack, shift;
|
| 540 |
uint32_t e1, e2, offset, ss, esp, ss_e1, ss_e2, push_size; |
| 541 |
uint32_t old_cs, old_ss, old_esp, old_eip; |
| 542 |
|
| 543 |
has_error_code = 0;
|
| 544 |
if (!is_int && !is_hw) {
|
| 545 |
switch(intno) {
|
| 546 |
case 8: |
| 547 |
case 10: |
| 548 |
case 11: |
| 549 |
case 12: |
| 550 |
case 13: |
| 551 |
case 14: |
| 552 |
case 17: |
| 553 |
has_error_code = 1;
|
| 554 |
break;
|
| 555 |
} |
| 556 |
} |
| 557 |
|
| 558 |
dt = &env->idt; |
| 559 |
if (intno * 8 + 7 > dt->limit) |
| 560 |
raise_exception_err(EXCP0D_GPF, intno * 8 + 2); |
| 561 |
ptr = dt->base + intno * 8;
|
| 562 |
e1 = ldl_kernel(ptr); |
| 563 |
e2 = ldl_kernel(ptr + 4);
|
| 564 |
/* check gate type */
|
| 565 |
type = (e2 >> DESC_TYPE_SHIFT) & 0x1f;
|
| 566 |
switch(type) {
|
| 567 |
case 5: /* task gate */ |
| 568 |
/* must do that check here to return the correct error code */
|
| 569 |
if (!(e2 & DESC_P_MASK))
|
| 570 |
raise_exception_err(EXCP0B_NOSEG, intno * 8 + 2); |
| 571 |
switch_tss(intno * 8, e1, e2, SWITCH_TSS_CALL);
|
| 572 |
if (has_error_code) {
|
| 573 |
int mask;
|
| 574 |
/* push the error code */
|
| 575 |
shift = (env->segs[R_CS].flags >> DESC_B_SHIFT) & 1;
|
| 576 |
if (env->segs[R_SS].flags & DESC_B_MASK)
|
| 577 |
mask = 0xffffffff;
|
| 578 |
else
|
| 579 |
mask = 0xffff;
|
| 580 |
esp = (env->regs[R_ESP] - (2 << shift)) & mask;
|
| 581 |
ssp = env->segs[R_SS].base + esp; |
| 582 |
if (shift)
|
| 583 |
stl_kernel(ssp, error_code); |
| 584 |
else
|
| 585 |
stw_kernel(ssp, error_code); |
| 586 |
env->regs[R_ESP] = (esp & mask) | (env->regs[R_ESP] & ~mask); |
| 587 |
} |
| 588 |
return;
|
| 589 |
case 6: /* 286 interrupt gate */ |
| 590 |
case 7: /* 286 trap gate */ |
| 591 |
case 14: /* 386 interrupt gate */ |
| 592 |
case 15: /* 386 trap gate */ |
| 593 |
break;
|
| 594 |
default:
|
| 595 |
raise_exception_err(EXCP0D_GPF, intno * 8 + 2); |
| 596 |
break;
|
| 597 |
} |
| 598 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 599 |
cpl = env->hflags & HF_CPL_MASK; |
| 600 |
/* check privledge if software int */
|
| 601 |
if (is_int && dpl < cpl)
|
| 602 |
raise_exception_err(EXCP0D_GPF, intno * 8 + 2); |
| 603 |
/* check valid bit */
|
| 604 |
if (!(e2 & DESC_P_MASK))
|
| 605 |
raise_exception_err(EXCP0B_NOSEG, intno * 8 + 2); |
| 606 |
selector = e1 >> 16;
|
| 607 |
offset = (e2 & 0xffff0000) | (e1 & 0x0000ffff); |
| 608 |
if ((selector & 0xfffc) == 0) |
| 609 |
raise_exception_err(EXCP0D_GPF, 0);
|
| 610 |
|
| 611 |
if (load_segment(&e1, &e2, selector) != 0) |
| 612 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 613 |
if (!(e2 & DESC_S_MASK) || !(e2 & (DESC_CS_MASK)))
|
| 614 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 615 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 616 |
if (dpl > cpl)
|
| 617 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 618 |
if (!(e2 & DESC_P_MASK))
|
| 619 |
raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc);
|
| 620 |
if (!(e2 & DESC_C_MASK) && dpl < cpl) {
|
| 621 |
/* to inner priviledge */
|
| 622 |
get_ss_esp_from_tss(&ss, &esp, dpl); |
| 623 |
if ((ss & 0xfffc) == 0) |
| 624 |
raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
| 625 |
if ((ss & 3) != dpl) |
| 626 |
raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
| 627 |
if (load_segment(&ss_e1, &ss_e2, ss) != 0) |
| 628 |
raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
| 629 |
ss_dpl = (ss_e2 >> DESC_DPL_SHIFT) & 3;
|
| 630 |
if (ss_dpl != dpl)
|
| 631 |
raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
| 632 |
if (!(ss_e2 & DESC_S_MASK) ||
|
| 633 |
(ss_e2 & DESC_CS_MASK) || |
| 634 |
!(ss_e2 & DESC_W_MASK)) |
| 635 |
raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
| 636 |
if (!(ss_e2 & DESC_P_MASK))
|
| 637 |
raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
| 638 |
new_stack = 1;
|
| 639 |
} else if ((e2 & DESC_C_MASK) || dpl == cpl) { |
| 640 |
/* to same priviledge */
|
| 641 |
new_stack = 0;
|
| 642 |
} else {
|
| 643 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 644 |
new_stack = 0; /* avoid warning */ |
| 645 |
} |
| 646 |
|
| 647 |
shift = type >> 3;
|
| 648 |
push_size = 6 + (new_stack << 2) + (has_error_code << 1); |
| 649 |
if (env->eflags & VM_MASK)
|
| 650 |
push_size += 8;
|
| 651 |
push_size <<= shift; |
| 652 |
|
| 653 |
/* XXX: check that enough room is available */
|
| 654 |
if (new_stack) {
|
| 655 |
old_esp = ESP; |
| 656 |
old_ss = env->segs[R_SS].selector; |
| 657 |
ss = (ss & ~3) | dpl;
|
| 658 |
cpu_x86_load_seg_cache(env, R_SS, ss, |
| 659 |
get_seg_base(ss_e1, ss_e2), |
| 660 |
get_seg_limit(ss_e1, ss_e2), |
| 661 |
ss_e2); |
| 662 |
} else {
|
| 663 |
old_esp = 0;
|
| 664 |
old_ss = 0;
|
| 665 |
esp = ESP; |
| 666 |
} |
| 667 |
if (is_int)
|
| 668 |
old_eip = next_eip; |
| 669 |
else
|
| 670 |
old_eip = env->eip; |
| 671 |
old_cs = env->segs[R_CS].selector; |
| 672 |
selector = (selector & ~3) | dpl;
|
| 673 |
cpu_x86_load_seg_cache(env, R_CS, selector, |
| 674 |
get_seg_base(e1, e2), |
| 675 |
get_seg_limit(e1, e2), |
| 676 |
e2); |
| 677 |
cpu_x86_set_cpl(env, dpl); |
| 678 |
env->eip = offset; |
| 679 |
ESP = esp - push_size; |
| 680 |
ssp = env->segs[R_SS].base + esp; |
| 681 |
if (shift == 1) { |
| 682 |
int old_eflags;
|
| 683 |
if (env->eflags & VM_MASK) {
|
| 684 |
ssp -= 4;
|
| 685 |
stl_kernel(ssp, env->segs[R_GS].selector); |
| 686 |
ssp -= 4;
|
| 687 |
stl_kernel(ssp, env->segs[R_FS].selector); |
| 688 |
ssp -= 4;
|
| 689 |
stl_kernel(ssp, env->segs[R_DS].selector); |
| 690 |
ssp -= 4;
|
| 691 |
stl_kernel(ssp, env->segs[R_ES].selector); |
| 692 |
} |
| 693 |
if (new_stack) {
|
| 694 |
ssp -= 4;
|
| 695 |
stl_kernel(ssp, old_ss); |
| 696 |
ssp -= 4;
|
| 697 |
stl_kernel(ssp, old_esp); |
| 698 |
} |
| 699 |
ssp -= 4;
|
| 700 |
old_eflags = compute_eflags(); |
| 701 |
stl_kernel(ssp, old_eflags); |
| 702 |
ssp -= 4;
|
| 703 |
stl_kernel(ssp, old_cs); |
| 704 |
ssp -= 4;
|
| 705 |
stl_kernel(ssp, old_eip); |
| 706 |
if (has_error_code) {
|
| 707 |
ssp -= 4;
|
| 708 |
stl_kernel(ssp, error_code); |
| 709 |
} |
| 710 |
} else {
|
| 711 |
if (new_stack) {
|
| 712 |
ssp -= 2;
|
| 713 |
stw_kernel(ssp, old_ss); |
| 714 |
ssp -= 2;
|
| 715 |
stw_kernel(ssp, old_esp); |
| 716 |
} |
| 717 |
ssp -= 2;
|
| 718 |
stw_kernel(ssp, compute_eflags()); |
| 719 |
ssp -= 2;
|
| 720 |
stw_kernel(ssp, old_cs); |
| 721 |
ssp -= 2;
|
| 722 |
stw_kernel(ssp, old_eip); |
| 723 |
if (has_error_code) {
|
| 724 |
ssp -= 2;
|
| 725 |
stw_kernel(ssp, error_code); |
| 726 |
} |
| 727 |
} |
| 728 |
|
| 729 |
/* interrupt gate clear IF mask */
|
| 730 |
if ((type & 1) == 0) { |
| 731 |
env->eflags &= ~IF_MASK; |
| 732 |
} |
| 733 |
env->eflags &= ~(TF_MASK | VM_MASK | RF_MASK | NT_MASK); |
| 734 |
} |
| 735 |
|
| 736 |
/* real mode interrupt */
|
| 737 |
static void do_interrupt_real(int intno, int is_int, int error_code, |
| 738 |
unsigned int next_eip) |
| 739 |
{
|
| 740 |
SegmentCache *dt; |
| 741 |
uint8_t *ptr, *ssp; |
| 742 |
int selector;
|
| 743 |
uint32_t offset, esp; |
| 744 |
uint32_t old_cs, old_eip; |
| 745 |
|
| 746 |
/* real mode (simpler !) */
|
| 747 |
dt = &env->idt; |
| 748 |
if (intno * 4 + 3 > dt->limit) |
| 749 |
raise_exception_err(EXCP0D_GPF, intno * 8 + 2); |
| 750 |
ptr = dt->base + intno * 4;
|
| 751 |
offset = lduw_kernel(ptr); |
| 752 |
selector = lduw_kernel(ptr + 2);
|
| 753 |
esp = ESP; |
| 754 |
ssp = env->segs[R_SS].base; |
| 755 |
if (is_int)
|
| 756 |
old_eip = next_eip; |
| 757 |
else
|
| 758 |
old_eip = env->eip; |
| 759 |
old_cs = env->segs[R_CS].selector; |
| 760 |
esp -= 2;
|
| 761 |
stw_kernel(ssp + (esp & 0xffff), compute_eflags());
|
| 762 |
esp -= 2;
|
| 763 |
stw_kernel(ssp + (esp & 0xffff), old_cs);
|
| 764 |
esp -= 2;
|
| 765 |
stw_kernel(ssp + (esp & 0xffff), old_eip);
|
| 766 |
|
| 767 |
/* update processor state */
|
| 768 |
ESP = (ESP & ~0xffff) | (esp & 0xffff); |
| 769 |
env->eip = offset; |
| 770 |
env->segs[R_CS].selector = selector; |
| 771 |
env->segs[R_CS].base = (uint8_t *)(selector << 4);
|
| 772 |
env->eflags &= ~(IF_MASK | TF_MASK | AC_MASK | RF_MASK); |
| 773 |
} |
| 774 |
|
| 775 |
/* fake user mode interrupt */
|
| 776 |
void do_interrupt_user(int intno, int is_int, int error_code, |
| 777 |
unsigned int next_eip) |
| 778 |
{
|
| 779 |
SegmentCache *dt; |
| 780 |
uint8_t *ptr; |
| 781 |
int dpl, cpl;
|
| 782 |
uint32_t e2; |
| 783 |
|
| 784 |
dt = &env->idt; |
| 785 |
ptr = dt->base + (intno * 8);
|
| 786 |
e2 = ldl_kernel(ptr + 4);
|
| 787 |
|
| 788 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 789 |
cpl = env->hflags & HF_CPL_MASK; |
| 790 |
/* check privledge if software int */
|
| 791 |
if (is_int && dpl < cpl)
|
| 792 |
raise_exception_err(EXCP0D_GPF, intno * 8 + 2); |
| 793 |
|
| 794 |
/* Since we emulate only user space, we cannot do more than
|
| 795 |
exiting the emulation with the suitable exception and error
|
| 796 |
code */
|
| 797 |
if (is_int)
|
| 798 |
EIP = next_eip; |
| 799 |
} |
| 800 |
|
| 801 |
/*
|
| 802 |
* Begin excution of an interruption. is_int is TRUE if coming from
|
| 803 |
* the int instruction. next_eip is the EIP value AFTER the interrupt
|
| 804 |
* instruction. It is only relevant if is_int is TRUE.
|
| 805 |
*/
|
| 806 |
void do_interrupt(int intno, int is_int, int error_code, |
| 807 |
unsigned int next_eip, int is_hw) |
| 808 |
{
|
| 809 |
if (env->cr[0] & CR0_PE_MASK) { |
| 810 |
do_interrupt_protected(intno, is_int, error_code, next_eip, is_hw); |
| 811 |
} else {
|
| 812 |
do_interrupt_real(intno, is_int, error_code, next_eip); |
| 813 |
} |
| 814 |
} |
| 815 |
|
| 816 |
/*
|
| 817 |
* Signal an interruption. It is executed in the main CPU loop.
|
| 818 |
* is_int is TRUE if coming from the int instruction. next_eip is the
|
| 819 |
* EIP value AFTER the interrupt instruction. It is only relevant if
|
| 820 |
* is_int is TRUE.
|
| 821 |
*/
|
| 822 |
void raise_interrupt(int intno, int is_int, int error_code, |
| 823 |
unsigned int next_eip) |
| 824 |
{
|
| 825 |
env->exception_index = intno; |
| 826 |
env->error_code = error_code; |
| 827 |
env->exception_is_int = is_int; |
| 828 |
env->exception_next_eip = next_eip; |
| 829 |
cpu_loop_exit(); |
| 830 |
} |
| 831 |
|
| 832 |
/* shortcuts to generate exceptions */
|
| 833 |
void raise_exception_err(int exception_index, int error_code) |
| 834 |
{
|
| 835 |
raise_interrupt(exception_index, 0, error_code, 0); |
| 836 |
} |
| 837 |
|
| 838 |
void raise_exception(int exception_index) |
| 839 |
{
|
| 840 |
raise_interrupt(exception_index, 0, 0, 0); |
| 841 |
} |
| 842 |
|
| 843 |
#ifdef BUGGY_GCC_DIV64
|
| 844 |
/* gcc 2.95.4 on PowerPC does not seem to like using __udivdi3, so we
|
| 845 |
call it from another function */
|
| 846 |
uint32_t div64(uint32_t *q_ptr, uint64_t num, uint32_t den) |
| 847 |
{
|
| 848 |
*q_ptr = num / den; |
| 849 |
return num % den;
|
| 850 |
} |
| 851 |
|
| 852 |
int32_t idiv64(int32_t *q_ptr, int64_t num, int32_t den) |
| 853 |
{
|
| 854 |
*q_ptr = num / den; |
| 855 |
return num % den;
|
| 856 |
} |
| 857 |
#endif
|
| 858 |
|
| 859 |
void helper_divl_EAX_T0(uint32_t eip)
|
| 860 |
{
|
| 861 |
unsigned int den, q, r; |
| 862 |
uint64_t num; |
| 863 |
|
| 864 |
num = EAX | ((uint64_t)EDX << 32);
|
| 865 |
den = T0; |
| 866 |
if (den == 0) { |
| 867 |
EIP = eip; |
| 868 |
raise_exception(EXCP00_DIVZ); |
| 869 |
} |
| 870 |
#ifdef BUGGY_GCC_DIV64
|
| 871 |
r = div64(&q, num, den); |
| 872 |
#else
|
| 873 |
q = (num / den); |
| 874 |
r = (num % den); |
| 875 |
#endif
|
| 876 |
EAX = q; |
| 877 |
EDX = r; |
| 878 |
} |
| 879 |
|
| 880 |
void helper_idivl_EAX_T0(uint32_t eip)
|
| 881 |
{
|
| 882 |
int den, q, r;
|
| 883 |
int64_t num; |
| 884 |
|
| 885 |
num = EAX | ((uint64_t)EDX << 32);
|
| 886 |
den = T0; |
| 887 |
if (den == 0) { |
| 888 |
EIP = eip; |
| 889 |
raise_exception(EXCP00_DIVZ); |
| 890 |
} |
| 891 |
#ifdef BUGGY_GCC_DIV64
|
| 892 |
r = idiv64(&q, num, den); |
| 893 |
#else
|
| 894 |
q = (num / den); |
| 895 |
r = (num % den); |
| 896 |
#endif
|
| 897 |
EAX = q; |
| 898 |
EDX = r; |
| 899 |
} |
| 900 |
|
| 901 |
void helper_cmpxchg8b(void) |
| 902 |
{
|
| 903 |
uint64_t d; |
| 904 |
int eflags;
|
| 905 |
|
| 906 |
eflags = cc_table[CC_OP].compute_all(); |
| 907 |
d = ldq((uint8_t *)A0); |
| 908 |
if (d == (((uint64_t)EDX << 32) | EAX)) { |
| 909 |
stq((uint8_t *)A0, ((uint64_t)ECX << 32) | EBX);
|
| 910 |
eflags |= CC_Z; |
| 911 |
} else {
|
| 912 |
EDX = d >> 32;
|
| 913 |
EAX = d; |
| 914 |
eflags &= ~CC_Z; |
| 915 |
} |
| 916 |
CC_SRC = eflags; |
| 917 |
} |
| 918 |
|
| 919 |
/* We simulate a pre-MMX pentium as in valgrind */
|
| 920 |
#define CPUID_FP87 (1 << 0) |
| 921 |
#define CPUID_VME (1 << 1) |
| 922 |
#define CPUID_DE (1 << 2) |
| 923 |
#define CPUID_PSE (1 << 3) |
| 924 |
#define CPUID_TSC (1 << 4) |
| 925 |
#define CPUID_MSR (1 << 5) |
| 926 |
#define CPUID_PAE (1 << 6) |
| 927 |
#define CPUID_MCE (1 << 7) |
| 928 |
#define CPUID_CX8 (1 << 8) |
| 929 |
#define CPUID_APIC (1 << 9) |
| 930 |
#define CPUID_SEP (1 << 11) /* sysenter/sysexit */ |
| 931 |
#define CPUID_MTRR (1 << 12) |
| 932 |
#define CPUID_PGE (1 << 13) |
| 933 |
#define CPUID_MCA (1 << 14) |
| 934 |
#define CPUID_CMOV (1 << 15) |
| 935 |
/* ... */
|
| 936 |
#define CPUID_MMX (1 << 23) |
| 937 |
#define CPUID_FXSR (1 << 24) |
| 938 |
#define CPUID_SSE (1 << 25) |
| 939 |
#define CPUID_SSE2 (1 << 26) |
| 940 |
|
| 941 |
void helper_cpuid(void) |
| 942 |
{
|
| 943 |
if (EAX == 0) { |
| 944 |
EAX = 1; /* max EAX index supported */ |
| 945 |
EBX = 0x756e6547;
|
| 946 |
ECX = 0x6c65746e;
|
| 947 |
EDX = 0x49656e69;
|
| 948 |
} else if (EAX == 1) { |
| 949 |
int family, model, stepping;
|
| 950 |
/* EAX = 1 info */
|
| 951 |
#if 0
|
| 952 |
/* pentium 75-200 */
|
| 953 |
family = 5;
|
| 954 |
model = 2;
|
| 955 |
stepping = 11;
|
| 956 |
#else
|
| 957 |
/* pentium pro */
|
| 958 |
family = 6;
|
| 959 |
model = 1;
|
| 960 |
stepping = 3;
|
| 961 |
#endif
|
| 962 |
EAX = (family << 8) | (model << 4) | stepping; |
| 963 |
EBX = 0;
|
| 964 |
ECX = 0;
|
| 965 |
EDX = CPUID_FP87 | CPUID_DE | CPUID_PSE | |
| 966 |
CPUID_TSC | CPUID_MSR | CPUID_MCE | |
| 967 |
CPUID_CX8 | CPUID_PGE | CPUID_CMOV; |
| 968 |
} |
| 969 |
} |
| 970 |
|
| 971 |
void helper_lldt_T0(void) |
| 972 |
{
|
| 973 |
int selector;
|
| 974 |
SegmentCache *dt; |
| 975 |
uint32_t e1, e2; |
| 976 |
int index;
|
| 977 |
uint8_t *ptr; |
| 978 |
|
| 979 |
selector = T0 & 0xffff;
|
| 980 |
if ((selector & 0xfffc) == 0) { |
| 981 |
/* XXX: NULL selector case: invalid LDT */
|
| 982 |
env->ldt.base = NULL;
|
| 983 |
env->ldt.limit = 0;
|
| 984 |
} else {
|
| 985 |
if (selector & 0x4) |
| 986 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 987 |
dt = &env->gdt; |
| 988 |
index = selector & ~7;
|
| 989 |
if ((index + 7) > dt->limit) |
| 990 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 991 |
ptr = dt->base + index; |
| 992 |
e1 = ldl_kernel(ptr); |
| 993 |
e2 = ldl_kernel(ptr + 4);
|
| 994 |
if ((e2 & DESC_S_MASK) || ((e2 >> DESC_TYPE_SHIFT) & 0xf) != 2) |
| 995 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 996 |
if (!(e2 & DESC_P_MASK))
|
| 997 |
raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc);
|
| 998 |
load_seg_cache_raw_dt(&env->ldt, e1, e2); |
| 999 |
} |
| 1000 |
env->ldt.selector = selector; |
| 1001 |
} |
| 1002 |
|
| 1003 |
void helper_ltr_T0(void) |
| 1004 |
{
|
| 1005 |
int selector;
|
| 1006 |
SegmentCache *dt; |
| 1007 |
uint32_t e1, e2; |
| 1008 |
int index, type;
|
| 1009 |
uint8_t *ptr; |
| 1010 |
|
| 1011 |
selector = T0 & 0xffff;
|
| 1012 |
if ((selector & 0xfffc) == 0) { |
| 1013 |
/* NULL selector case: invalid LDT */
|
| 1014 |
env->tr.base = NULL;
|
| 1015 |
env->tr.limit = 0;
|
| 1016 |
env->tr.flags = 0;
|
| 1017 |
} else {
|
| 1018 |
if (selector & 0x4) |
| 1019 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 1020 |
dt = &env->gdt; |
| 1021 |
index = selector & ~7;
|
| 1022 |
if ((index + 7) > dt->limit) |
| 1023 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 1024 |
ptr = dt->base + index; |
| 1025 |
e1 = ldl_kernel(ptr); |
| 1026 |
e2 = ldl_kernel(ptr + 4);
|
| 1027 |
type = (e2 >> DESC_TYPE_SHIFT) & 0xf;
|
| 1028 |
if ((e2 & DESC_S_MASK) ||
|
| 1029 |
(type != 1 && type != 9)) |
| 1030 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 1031 |
if (!(e2 & DESC_P_MASK))
|
| 1032 |
raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc);
|
| 1033 |
load_seg_cache_raw_dt(&env->tr, e1, e2); |
| 1034 |
e2 |= 0x00000200; /* set the busy bit */ |
| 1035 |
stl_kernel(ptr + 4, e2);
|
| 1036 |
} |
| 1037 |
env->tr.selector = selector; |
| 1038 |
} |
| 1039 |
|
| 1040 |
/* only works if protected mode and not VM86. seg_reg must be != R_CS */
|
| 1041 |
void load_seg(int seg_reg, int selector, unsigned int cur_eip) |
| 1042 |
{
|
| 1043 |
uint32_t e1, e2; |
| 1044 |
int cpl, dpl, rpl;
|
| 1045 |
SegmentCache *dt; |
| 1046 |
int index;
|
| 1047 |
uint8_t *ptr; |
| 1048 |
|
| 1049 |
if ((selector & 0xfffc) == 0) { |
| 1050 |
/* null selector case */
|
| 1051 |
if (seg_reg == R_SS) {
|
| 1052 |
EIP = cur_eip; |
| 1053 |
raise_exception_err(EXCP0D_GPF, 0);
|
| 1054 |
} else {
|
| 1055 |
cpu_x86_load_seg_cache(env, seg_reg, selector, NULL, 0, 0); |
| 1056 |
} |
| 1057 |
} else {
|
| 1058 |
|
| 1059 |
if (selector & 0x4) |
| 1060 |
dt = &env->ldt; |
| 1061 |
else
|
| 1062 |
dt = &env->gdt; |
| 1063 |
index = selector & ~7;
|
| 1064 |
if ((index + 7) > dt->limit) { |
| 1065 |
EIP = cur_eip; |
| 1066 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 1067 |
} |
| 1068 |
ptr = dt->base + index; |
| 1069 |
e1 = ldl_kernel(ptr); |
| 1070 |
e2 = ldl_kernel(ptr + 4);
|
| 1071 |
|
| 1072 |
if (!(e2 & DESC_S_MASK)) {
|
| 1073 |
EIP = cur_eip; |
| 1074 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 1075 |
} |
| 1076 |
rpl = selector & 3;
|
| 1077 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 1078 |
cpl = env->hflags & HF_CPL_MASK; |
| 1079 |
if (seg_reg == R_SS) {
|
| 1080 |
/* must be writable segment */
|
| 1081 |
if ((e2 & DESC_CS_MASK) || !(e2 & DESC_W_MASK)) {
|
| 1082 |
EIP = cur_eip; |
| 1083 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 1084 |
} |
| 1085 |
if (rpl != cpl || dpl != cpl) {
|
| 1086 |
EIP = cur_eip; |
| 1087 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 1088 |
} |
| 1089 |
} else {
|
| 1090 |
/* must be readable segment */
|
| 1091 |
if ((e2 & (DESC_CS_MASK | DESC_R_MASK)) == DESC_CS_MASK) {
|
| 1092 |
EIP = cur_eip; |
| 1093 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 1094 |
} |
| 1095 |
|
| 1096 |
if (!(e2 & DESC_CS_MASK) || !(e2 & DESC_C_MASK)) {
|
| 1097 |
/* if not conforming code, test rights */
|
| 1098 |
if (dpl < cpl || dpl < rpl) {
|
| 1099 |
EIP = cur_eip; |
| 1100 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 1101 |
} |
| 1102 |
} |
| 1103 |
} |
| 1104 |
|
| 1105 |
if (!(e2 & DESC_P_MASK)) {
|
| 1106 |
EIP = cur_eip; |
| 1107 |
if (seg_reg == R_SS)
|
| 1108 |
raise_exception_err(EXCP0C_STACK, selector & 0xfffc);
|
| 1109 |
else
|
| 1110 |
raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc);
|
| 1111 |
} |
| 1112 |
|
| 1113 |
/* set the access bit if not already set */
|
| 1114 |
if (!(e2 & DESC_A_MASK)) {
|
| 1115 |
e2 |= DESC_A_MASK; |
| 1116 |
stl_kernel(ptr + 4, e2);
|
| 1117 |
} |
| 1118 |
|
| 1119 |
cpu_x86_load_seg_cache(env, seg_reg, selector, |
| 1120 |
get_seg_base(e1, e2), |
| 1121 |
get_seg_limit(e1, e2), |
| 1122 |
e2); |
| 1123 |
#if 0
|
| 1124 |
fprintf(logfile, "load_seg: sel=0x%04x base=0x%08lx limit=0x%08lx flags=%08x\n",
|
| 1125 |
selector, (unsigned long)sc->base, sc->limit, sc->flags);
|
| 1126 |
#endif
|
| 1127 |
} |
| 1128 |
} |
| 1129 |
|
| 1130 |
/* protected mode jump */
|
| 1131 |
void helper_ljmp_protected_T0_T1(void) |
| 1132 |
{
|
| 1133 |
int new_cs, new_eip, gate_cs, type;
|
| 1134 |
uint32_t e1, e2, cpl, dpl, rpl, limit; |
| 1135 |
|
| 1136 |
new_cs = T0; |
| 1137 |
new_eip = T1; |
| 1138 |
if ((new_cs & 0xfffc) == 0) |
| 1139 |
raise_exception_err(EXCP0D_GPF, 0);
|
| 1140 |
if (load_segment(&e1, &e2, new_cs) != 0) |
| 1141 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1142 |
cpl = env->hflags & HF_CPL_MASK; |
| 1143 |
if (e2 & DESC_S_MASK) {
|
| 1144 |
if (!(e2 & DESC_CS_MASK))
|
| 1145 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1146 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 1147 |
if (e2 & DESC_C_MASK) {
|
| 1148 |
/* conforming code segment */
|
| 1149 |
if (dpl > cpl)
|
| 1150 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1151 |
} else {
|
| 1152 |
/* non conforming code segment */
|
| 1153 |
rpl = new_cs & 3;
|
| 1154 |
if (rpl > cpl)
|
| 1155 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1156 |
if (dpl != cpl)
|
| 1157 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1158 |
} |
| 1159 |
if (!(e2 & DESC_P_MASK))
|
| 1160 |
raise_exception_err(EXCP0B_NOSEG, new_cs & 0xfffc);
|
| 1161 |
limit = get_seg_limit(e1, e2); |
| 1162 |
if (new_eip > limit)
|
| 1163 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1164 |
cpu_x86_load_seg_cache(env, R_CS, (new_cs & 0xfffc) | cpl,
|
| 1165 |
get_seg_base(e1, e2), limit, e2); |
| 1166 |
EIP = new_eip; |
| 1167 |
} else {
|
| 1168 |
/* jump to call or task gate */
|
| 1169 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 1170 |
rpl = new_cs & 3;
|
| 1171 |
cpl = env->hflags & HF_CPL_MASK; |
| 1172 |
type = (e2 >> DESC_TYPE_SHIFT) & 0xf;
|
| 1173 |
switch(type) {
|
| 1174 |
case 1: /* 286 TSS */ |
| 1175 |
case 9: /* 386 TSS */ |
| 1176 |
case 5: /* task gate */ |
| 1177 |
if (dpl < cpl || dpl < rpl)
|
| 1178 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1179 |
switch_tss(new_cs, e1, e2, SWITCH_TSS_JMP); |
| 1180 |
break;
|
| 1181 |
case 4: /* 286 call gate */ |
| 1182 |
case 12: /* 386 call gate */ |
| 1183 |
if ((dpl < cpl) || (dpl < rpl))
|
| 1184 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1185 |
if (!(e2 & DESC_P_MASK))
|
| 1186 |
raise_exception_err(EXCP0B_NOSEG, new_cs & 0xfffc);
|
| 1187 |
gate_cs = e1 >> 16;
|
| 1188 |
if (load_segment(&e1, &e2, gate_cs) != 0) |
| 1189 |
raise_exception_err(EXCP0D_GPF, gate_cs & 0xfffc);
|
| 1190 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 1191 |
/* must be code segment */
|
| 1192 |
if (((e2 & (DESC_S_MASK | DESC_CS_MASK)) !=
|
| 1193 |
(DESC_S_MASK | DESC_CS_MASK))) |
| 1194 |
raise_exception_err(EXCP0D_GPF, gate_cs & 0xfffc);
|
| 1195 |
if (((e2 & DESC_C_MASK) && (dpl > cpl)) ||
|
| 1196 |
(!(e2 & DESC_C_MASK) && (dpl != cpl))) |
| 1197 |
raise_exception_err(EXCP0D_GPF, gate_cs & 0xfffc);
|
| 1198 |
if (!(e2 & DESC_P_MASK))
|
| 1199 |
raise_exception_err(EXCP0D_GPF, gate_cs & 0xfffc);
|
| 1200 |
new_eip = (e1 & 0xffff);
|
| 1201 |
if (type == 12) |
| 1202 |
new_eip |= (e2 & 0xffff0000);
|
| 1203 |
limit = get_seg_limit(e1, e2); |
| 1204 |
if (new_eip > limit)
|
| 1205 |
raise_exception_err(EXCP0D_GPF, 0);
|
| 1206 |
cpu_x86_load_seg_cache(env, R_CS, (gate_cs & 0xfffc) | cpl,
|
| 1207 |
get_seg_base(e1, e2), limit, e2); |
| 1208 |
EIP = new_eip; |
| 1209 |
break;
|
| 1210 |
default:
|
| 1211 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1212 |
break;
|
| 1213 |
} |
| 1214 |
} |
| 1215 |
} |
| 1216 |
|
| 1217 |
/* real mode call */
|
| 1218 |
void helper_lcall_real_T0_T1(int shift, int next_eip) |
| 1219 |
{
|
| 1220 |
int new_cs, new_eip;
|
| 1221 |
uint32_t esp, esp_mask; |
| 1222 |
uint8_t *ssp; |
| 1223 |
|
| 1224 |
new_cs = T0; |
| 1225 |
new_eip = T1; |
| 1226 |
esp = ESP; |
| 1227 |
esp_mask = 0xffffffff;
|
| 1228 |
if (!(env->segs[R_SS].flags & DESC_B_MASK))
|
| 1229 |
esp_mask = 0xffff;
|
| 1230 |
ssp = env->segs[R_SS].base; |
| 1231 |
if (shift) {
|
| 1232 |
esp -= 4;
|
| 1233 |
stl_kernel(ssp + (esp & esp_mask), env->segs[R_CS].selector); |
| 1234 |
esp -= 4;
|
| 1235 |
stl_kernel(ssp + (esp & esp_mask), next_eip); |
| 1236 |
} else {
|
| 1237 |
esp -= 2;
|
| 1238 |
stw_kernel(ssp + (esp & esp_mask), env->segs[R_CS].selector); |
| 1239 |
esp -= 2;
|
| 1240 |
stw_kernel(ssp + (esp & esp_mask), next_eip); |
| 1241 |
} |
| 1242 |
|
| 1243 |
if (!(env->segs[R_SS].flags & DESC_B_MASK))
|
| 1244 |
ESP = (ESP & ~0xffff) | (esp & 0xffff); |
| 1245 |
else
|
| 1246 |
ESP = esp; |
| 1247 |
env->eip = new_eip; |
| 1248 |
env->segs[R_CS].selector = new_cs; |
| 1249 |
env->segs[R_CS].base = (uint8_t *)(new_cs << 4);
|
| 1250 |
} |
| 1251 |
|
| 1252 |
/* protected mode call */
|
| 1253 |
void helper_lcall_protected_T0_T1(int shift, int next_eip) |
| 1254 |
{
|
| 1255 |
int new_cs, new_eip;
|
| 1256 |
uint32_t e1, e2, cpl, dpl, rpl, selector, offset, param_count; |
| 1257 |
uint32_t ss, ss_e1, ss_e2, push_size, sp, type, ss_dpl; |
| 1258 |
uint32_t old_ss, old_esp, val, i, limit; |
| 1259 |
uint8_t *ssp, *old_ssp; |
| 1260 |
|
| 1261 |
new_cs = T0; |
| 1262 |
new_eip = T1; |
| 1263 |
if ((new_cs & 0xfffc) == 0) |
| 1264 |
raise_exception_err(EXCP0D_GPF, 0);
|
| 1265 |
if (load_segment(&e1, &e2, new_cs) != 0) |
| 1266 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1267 |
cpl = env->hflags & HF_CPL_MASK; |
| 1268 |
if (e2 & DESC_S_MASK) {
|
| 1269 |
if (!(e2 & DESC_CS_MASK))
|
| 1270 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1271 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 1272 |
if (e2 & DESC_C_MASK) {
|
| 1273 |
/* conforming code segment */
|
| 1274 |
if (dpl > cpl)
|
| 1275 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1276 |
} else {
|
| 1277 |
/* non conforming code segment */
|
| 1278 |
rpl = new_cs & 3;
|
| 1279 |
if (rpl > cpl)
|
| 1280 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1281 |
if (dpl != cpl)
|
| 1282 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1283 |
} |
| 1284 |
if (!(e2 & DESC_P_MASK))
|
| 1285 |
raise_exception_err(EXCP0B_NOSEG, new_cs & 0xfffc);
|
| 1286 |
|
| 1287 |
sp = ESP; |
| 1288 |
if (!(env->segs[R_SS].flags & DESC_B_MASK))
|
| 1289 |
sp &= 0xffff;
|
| 1290 |
ssp = env->segs[R_SS].base + sp; |
| 1291 |
if (shift) {
|
| 1292 |
ssp -= 4;
|
| 1293 |
stl_kernel(ssp, env->segs[R_CS].selector); |
| 1294 |
ssp -= 4;
|
| 1295 |
stl_kernel(ssp, next_eip); |
| 1296 |
} else {
|
| 1297 |
ssp -= 2;
|
| 1298 |
stw_kernel(ssp, env->segs[R_CS].selector); |
| 1299 |
ssp -= 2;
|
| 1300 |
stw_kernel(ssp, next_eip); |
| 1301 |
} |
| 1302 |
sp -= (4 << shift);
|
| 1303 |
|
| 1304 |
limit = get_seg_limit(e1, e2); |
| 1305 |
if (new_eip > limit)
|
| 1306 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1307 |
/* from this point, not restartable */
|
| 1308 |
if (!(env->segs[R_SS].flags & DESC_B_MASK))
|
| 1309 |
ESP = (ESP & 0xffff0000) | (sp & 0xffff); |
| 1310 |
else
|
| 1311 |
ESP = sp; |
| 1312 |
cpu_x86_load_seg_cache(env, R_CS, (new_cs & 0xfffc) | cpl,
|
| 1313 |
get_seg_base(e1, e2), limit, e2); |
| 1314 |
EIP = new_eip; |
| 1315 |
} else {
|
| 1316 |
/* check gate type */
|
| 1317 |
type = (e2 >> DESC_TYPE_SHIFT) & 0x1f;
|
| 1318 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 1319 |
rpl = new_cs & 3;
|
| 1320 |
switch(type) {
|
| 1321 |
case 1: /* available 286 TSS */ |
| 1322 |
case 9: /* available 386 TSS */ |
| 1323 |
case 5: /* task gate */ |
| 1324 |
if (dpl < cpl || dpl < rpl)
|
| 1325 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1326 |
switch_tss(new_cs, e1, e2, SWITCH_TSS_CALL); |
| 1327 |
break;
|
| 1328 |
case 4: /* 286 call gate */ |
| 1329 |
case 12: /* 386 call gate */ |
| 1330 |
break;
|
| 1331 |
default:
|
| 1332 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1333 |
break;
|
| 1334 |
} |
| 1335 |
shift = type >> 3;
|
| 1336 |
|
| 1337 |
if (dpl < cpl || dpl < rpl)
|
| 1338 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1339 |
/* check valid bit */
|
| 1340 |
if (!(e2 & DESC_P_MASK))
|
| 1341 |
raise_exception_err(EXCP0B_NOSEG, new_cs & 0xfffc);
|
| 1342 |
selector = e1 >> 16;
|
| 1343 |
offset = (e2 & 0xffff0000) | (e1 & 0x0000ffff); |
| 1344 |
if ((selector & 0xfffc) == 0) |
| 1345 |
raise_exception_err(EXCP0D_GPF, 0);
|
| 1346 |
|
| 1347 |
if (load_segment(&e1, &e2, selector) != 0) |
| 1348 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 1349 |
if (!(e2 & DESC_S_MASK) || !(e2 & (DESC_CS_MASK)))
|
| 1350 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 1351 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 1352 |
if (dpl > cpl)
|
| 1353 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 1354 |
if (!(e2 & DESC_P_MASK))
|
| 1355 |
raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc);
|
| 1356 |
|
| 1357 |
if (!(e2 & DESC_C_MASK) && dpl < cpl) {
|
| 1358 |
/* to inner priviledge */
|
| 1359 |
get_ss_esp_from_tss(&ss, &sp, dpl); |
| 1360 |
if ((ss & 0xfffc) == 0) |
| 1361 |
raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
| 1362 |
if ((ss & 3) != dpl) |
| 1363 |
raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
| 1364 |
if (load_segment(&ss_e1, &ss_e2, ss) != 0) |
| 1365 |
raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
| 1366 |
ss_dpl = (ss_e2 >> DESC_DPL_SHIFT) & 3;
|
| 1367 |
if (ss_dpl != dpl)
|
| 1368 |
raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
| 1369 |
if (!(ss_e2 & DESC_S_MASK) ||
|
| 1370 |
(ss_e2 & DESC_CS_MASK) || |
| 1371 |
!(ss_e2 & DESC_W_MASK)) |
| 1372 |
raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
| 1373 |
if (!(ss_e2 & DESC_P_MASK))
|
| 1374 |
raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
| 1375 |
|
| 1376 |
param_count = e2 & 0x1f;
|
| 1377 |
push_size = ((param_count * 2) + 8) << shift; |
| 1378 |
|
| 1379 |
old_esp = ESP; |
| 1380 |
old_ss = env->segs[R_SS].selector; |
| 1381 |
if (!(env->segs[R_SS].flags & DESC_B_MASK))
|
| 1382 |
old_esp &= 0xffff;
|
| 1383 |
old_ssp = env->segs[R_SS].base + old_esp; |
| 1384 |
|
| 1385 |
/* XXX: from this point not restartable */
|
| 1386 |
ss = (ss & ~3) | dpl;
|
| 1387 |
cpu_x86_load_seg_cache(env, R_SS, ss, |
| 1388 |
get_seg_base(ss_e1, ss_e2), |
| 1389 |
get_seg_limit(ss_e1, ss_e2), |
| 1390 |
ss_e2); |
| 1391 |
|
| 1392 |
if (!(env->segs[R_SS].flags & DESC_B_MASK))
|
| 1393 |
sp &= 0xffff;
|
| 1394 |
ssp = env->segs[R_SS].base + sp; |
| 1395 |
if (shift) {
|
| 1396 |
ssp -= 4;
|
| 1397 |
stl_kernel(ssp, old_ss); |
| 1398 |
ssp -= 4;
|
| 1399 |
stl_kernel(ssp, old_esp); |
| 1400 |
ssp -= 4 * param_count;
|
| 1401 |
for(i = 0; i < param_count; i++) { |
| 1402 |
val = ldl_kernel(old_ssp + i * 4);
|
| 1403 |
stl_kernel(ssp + i * 4, val);
|
| 1404 |
} |
| 1405 |
} else {
|
| 1406 |
ssp -= 2;
|
| 1407 |
stw_kernel(ssp, old_ss); |
| 1408 |
ssp -= 2;
|
| 1409 |
stw_kernel(ssp, old_esp); |
| 1410 |
ssp -= 2 * param_count;
|
| 1411 |
for(i = 0; i < param_count; i++) { |
| 1412 |
val = lduw_kernel(old_ssp + i * 2);
|
| 1413 |
stw_kernel(ssp + i * 2, val);
|
| 1414 |
} |
| 1415 |
} |
| 1416 |
} else {
|
| 1417 |
/* to same priviledge */
|
| 1418 |
if (!(env->segs[R_SS].flags & DESC_B_MASK))
|
| 1419 |
sp &= 0xffff;
|
| 1420 |
ssp = env->segs[R_SS].base + sp; |
| 1421 |
push_size = (4 << shift);
|
| 1422 |
} |
| 1423 |
|
| 1424 |
if (shift) {
|
| 1425 |
ssp -= 4;
|
| 1426 |
stl_kernel(ssp, env->segs[R_CS].selector); |
| 1427 |
ssp -= 4;
|
| 1428 |
stl_kernel(ssp, next_eip); |
| 1429 |
} else {
|
| 1430 |
ssp -= 2;
|
| 1431 |
stw_kernel(ssp, env->segs[R_CS].selector); |
| 1432 |
ssp -= 2;
|
| 1433 |
stw_kernel(ssp, next_eip); |
| 1434 |
} |
| 1435 |
|
| 1436 |
sp -= push_size; |
| 1437 |
selector = (selector & ~3) | dpl;
|
| 1438 |
cpu_x86_load_seg_cache(env, R_CS, selector, |
| 1439 |
get_seg_base(e1, e2), |
| 1440 |
get_seg_limit(e1, e2), |
| 1441 |
e2); |
| 1442 |
cpu_x86_set_cpl(env, dpl); |
| 1443 |
|
| 1444 |
/* from this point, not restartable if same priviledge */
|
| 1445 |
if (!(env->segs[R_SS].flags & DESC_B_MASK))
|
| 1446 |
ESP = (ESP & 0xffff0000) | (sp & 0xffff); |
| 1447 |
else
|
| 1448 |
ESP = sp; |
| 1449 |
EIP = offset; |
| 1450 |
} |
| 1451 |
} |
| 1452 |
|
| 1453 |
/* real and vm86 mode iret */
|
| 1454 |
void helper_iret_real(int shift) |
| 1455 |
{
|
| 1456 |
uint32_t sp, new_cs, new_eip, new_eflags, new_esp; |
| 1457 |
uint8_t *ssp; |
| 1458 |
int eflags_mask;
|
| 1459 |
|
| 1460 |
sp = ESP & 0xffff;
|
| 1461 |
ssp = env->segs[R_SS].base + sp; |
| 1462 |
if (shift == 1) { |
| 1463 |
/* 32 bits */
|
| 1464 |
new_eflags = ldl_kernel(ssp + 8);
|
| 1465 |
new_cs = ldl_kernel(ssp + 4) & 0xffff; |
| 1466 |
new_eip = ldl_kernel(ssp) & 0xffff;
|
| 1467 |
} else {
|
| 1468 |
/* 16 bits */
|
| 1469 |
new_eflags = lduw_kernel(ssp + 4);
|
| 1470 |
new_cs = lduw_kernel(ssp + 2);
|
| 1471 |
new_eip = lduw_kernel(ssp); |
| 1472 |
} |
| 1473 |
new_esp = sp + (6 << shift);
|
| 1474 |
ESP = (ESP & 0xffff0000) |
|
| 1475 |
(new_esp & 0xffff);
|
| 1476 |
load_seg_vm(R_CS, new_cs); |
| 1477 |
env->eip = new_eip; |
| 1478 |
if (env->eflags & VM_MASK)
|
| 1479 |
eflags_mask = FL_UPDATE_MASK32 | IF_MASK | RF_MASK; |
| 1480 |
else
|
| 1481 |
eflags_mask = FL_UPDATE_CPL0_MASK; |
| 1482 |
if (shift == 0) |
| 1483 |
eflags_mask &= 0xffff;
|
| 1484 |
load_eflags(new_eflags, eflags_mask); |
| 1485 |
} |
| 1486 |
|
| 1487 |
/* protected mode iret */
|
| 1488 |
static inline void helper_ret_protected(int shift, int is_iret, int addend) |
| 1489 |
{
|
| 1490 |
uint32_t sp, new_cs, new_eip, new_eflags, new_esp, new_ss; |
| 1491 |
uint32_t new_es, new_ds, new_fs, new_gs; |
| 1492 |
uint32_t e1, e2, ss_e1, ss_e2; |
| 1493 |
int cpl, dpl, rpl, eflags_mask;
|
| 1494 |
uint8_t *ssp; |
| 1495 |
|
| 1496 |
sp = ESP; |
| 1497 |
if (!(env->segs[R_SS].flags & DESC_B_MASK))
|
| 1498 |
sp &= 0xffff;
|
| 1499 |
ssp = env->segs[R_SS].base + sp; |
| 1500 |
if (shift == 1) { |
| 1501 |
/* 32 bits */
|
| 1502 |
if (is_iret)
|
| 1503 |
new_eflags = ldl_kernel(ssp + 8);
|
| 1504 |
new_cs = ldl_kernel(ssp + 4) & 0xffff; |
| 1505 |
new_eip = ldl_kernel(ssp); |
| 1506 |
if (is_iret && (new_eflags & VM_MASK))
|
| 1507 |
goto return_to_vm86;
|
| 1508 |
} else {
|
| 1509 |
/* 16 bits */
|
| 1510 |
if (is_iret)
|
| 1511 |
new_eflags = lduw_kernel(ssp + 4);
|
| 1512 |
new_cs = lduw_kernel(ssp + 2);
|
| 1513 |
new_eip = lduw_kernel(ssp); |
| 1514 |
} |
| 1515 |
if ((new_cs & 0xfffc) == 0) |
| 1516 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1517 |
if (load_segment(&e1, &e2, new_cs) != 0) |
| 1518 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1519 |
if (!(e2 & DESC_S_MASK) ||
|
| 1520 |
!(e2 & DESC_CS_MASK)) |
| 1521 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1522 |
cpl = env->hflags & HF_CPL_MASK; |
| 1523 |
rpl = new_cs & 3;
|
| 1524 |
if (rpl < cpl)
|
| 1525 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1526 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 1527 |
if (e2 & DESC_C_MASK) {
|
| 1528 |
if (dpl > rpl)
|
| 1529 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1530 |
} else {
|
| 1531 |
if (dpl != rpl)
|
| 1532 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1533 |
} |
| 1534 |
if (!(e2 & DESC_P_MASK))
|
| 1535 |
raise_exception_err(EXCP0B_NOSEG, new_cs & 0xfffc);
|
| 1536 |
|
| 1537 |
if (rpl == cpl) {
|
| 1538 |
/* return to same priledge level */
|
| 1539 |
cpu_x86_load_seg_cache(env, R_CS, new_cs, |
| 1540 |
get_seg_base(e1, e2), |
| 1541 |
get_seg_limit(e1, e2), |
| 1542 |
e2); |
| 1543 |
new_esp = sp + (4 << shift) + ((2 * is_iret) << shift) + addend; |
| 1544 |
} else {
|
| 1545 |
/* return to different priviledge level */
|
| 1546 |
ssp += (4 << shift) + ((2 * is_iret) << shift) + addend; |
| 1547 |
if (shift == 1) { |
| 1548 |
/* 32 bits */
|
| 1549 |
new_esp = ldl_kernel(ssp); |
| 1550 |
new_ss = ldl_kernel(ssp + 4) & 0xffff; |
| 1551 |
} else {
|
| 1552 |
/* 16 bits */
|
| 1553 |
new_esp = lduw_kernel(ssp); |
| 1554 |
new_ss = lduw_kernel(ssp + 2);
|
| 1555 |
} |
| 1556 |
|
| 1557 |
if ((new_ss & 3) != rpl) |
| 1558 |
raise_exception_err(EXCP0D_GPF, new_ss & 0xfffc);
|
| 1559 |
if (load_segment(&ss_e1, &ss_e2, new_ss) != 0) |
| 1560 |
raise_exception_err(EXCP0D_GPF, new_ss & 0xfffc);
|
| 1561 |
if (!(ss_e2 & DESC_S_MASK) ||
|
| 1562 |
(ss_e2 & DESC_CS_MASK) || |
| 1563 |
!(ss_e2 & DESC_W_MASK)) |
| 1564 |
raise_exception_err(EXCP0D_GPF, new_ss & 0xfffc);
|
| 1565 |
dpl = (ss_e2 >> DESC_DPL_SHIFT) & 3;
|
| 1566 |
if (dpl != rpl)
|
| 1567 |
raise_exception_err(EXCP0D_GPF, new_ss & 0xfffc);
|
| 1568 |
if (!(ss_e2 & DESC_P_MASK))
|
| 1569 |
raise_exception_err(EXCP0B_NOSEG, new_ss & 0xfffc);
|
| 1570 |
|
| 1571 |
cpu_x86_load_seg_cache(env, R_CS, new_cs, |
| 1572 |
get_seg_base(e1, e2), |
| 1573 |
get_seg_limit(e1, e2), |
| 1574 |
e2); |
| 1575 |
cpu_x86_load_seg_cache(env, R_SS, new_ss, |
| 1576 |
get_seg_base(ss_e1, ss_e2), |
| 1577 |
get_seg_limit(ss_e1, ss_e2), |
| 1578 |
ss_e2); |
| 1579 |
cpu_x86_set_cpl(env, rpl); |
| 1580 |
} |
| 1581 |
if (env->segs[R_SS].flags & DESC_B_MASK)
|
| 1582 |
ESP = new_esp; |
| 1583 |
else
|
| 1584 |
ESP = (ESP & 0xffff0000) |
|
| 1585 |
(new_esp & 0xffff);
|
| 1586 |
env->eip = new_eip; |
| 1587 |
if (is_iret) {
|
| 1588 |
/* NOTE: 'cpl' can be different from the current CPL */
|
| 1589 |
if (cpl == 0) |
| 1590 |
eflags_mask = FL_UPDATE_CPL0_MASK; |
| 1591 |
else
|
| 1592 |
eflags_mask = FL_UPDATE_MASK32; |
| 1593 |
if (shift == 0) |
| 1594 |
eflags_mask &= 0xffff;
|
| 1595 |
load_eflags(new_eflags, eflags_mask); |
| 1596 |
} |
| 1597 |
return;
|
| 1598 |
|
| 1599 |
return_to_vm86:
|
| 1600 |
new_esp = ldl_kernel(ssp + 12);
|
| 1601 |
new_ss = ldl_kernel(ssp + 16);
|
| 1602 |
new_es = ldl_kernel(ssp + 20);
|
| 1603 |
new_ds = ldl_kernel(ssp + 24);
|
| 1604 |
new_fs = ldl_kernel(ssp + 28);
|
| 1605 |
new_gs = ldl_kernel(ssp + 32);
|
| 1606 |
|
| 1607 |
/* modify processor state */
|
| 1608 |
load_eflags(new_eflags, FL_UPDATE_CPL0_MASK | VM_MASK | VIF_MASK | VIP_MASK); |
| 1609 |
load_seg_vm(R_CS, new_cs); |
| 1610 |
cpu_x86_set_cpl(env, 3);
|
| 1611 |
load_seg_vm(R_SS, new_ss); |
| 1612 |
load_seg_vm(R_ES, new_es); |
| 1613 |
load_seg_vm(R_DS, new_ds); |
| 1614 |
load_seg_vm(R_FS, new_fs); |
| 1615 |
load_seg_vm(R_GS, new_gs); |
| 1616 |
|
| 1617 |
env->eip = new_eip; |
| 1618 |
ESP = new_esp; |
| 1619 |
} |
| 1620 |
|
| 1621 |
void helper_iret_protected(int shift) |
| 1622 |
{
|
| 1623 |
int tss_selector, type;
|
| 1624 |
uint32_t e1, e2; |
| 1625 |
|
| 1626 |
/* specific case for TSS */
|
| 1627 |
if (env->eflags & NT_MASK) {
|
| 1628 |
tss_selector = lduw_kernel(env->tr.base + 0);
|
| 1629 |
if (tss_selector & 4) |
| 1630 |
raise_exception_err(EXCP0A_TSS, tss_selector & 0xfffc);
|
| 1631 |
if (load_segment(&e1, &e2, tss_selector) != 0) |
| 1632 |
raise_exception_err(EXCP0A_TSS, tss_selector & 0xfffc);
|
| 1633 |
type = (e2 >> DESC_TYPE_SHIFT) & 0x17;
|
| 1634 |
/* NOTE: we check both segment and busy TSS */
|
| 1635 |
if (type != 3) |
| 1636 |
raise_exception_err(EXCP0A_TSS, tss_selector & 0xfffc);
|
| 1637 |
switch_tss(tss_selector, e1, e2, SWITCH_TSS_IRET); |
| 1638 |
} else {
|
| 1639 |
helper_ret_protected(shift, 1, 0); |
| 1640 |
} |
| 1641 |
} |
| 1642 |
|
| 1643 |
void helper_lret_protected(int shift, int addend) |
| 1644 |
{
|
| 1645 |
helper_ret_protected(shift, 0, addend);
|
| 1646 |
} |
| 1647 |
|
| 1648 |
void helper_movl_crN_T0(int reg) |
| 1649 |
{
|
| 1650 |
env->cr[reg] = T0; |
| 1651 |
switch(reg) {
|
| 1652 |
case 0: |
| 1653 |
cpu_x86_update_cr0(env); |
| 1654 |
break;
|
| 1655 |
case 3: |
| 1656 |
cpu_x86_update_cr3(env); |
| 1657 |
break;
|
| 1658 |
} |
| 1659 |
} |
| 1660 |
|
| 1661 |
/* XXX: do more */
|
| 1662 |
void helper_movl_drN_T0(int reg) |
| 1663 |
{
|
| 1664 |
env->dr[reg] = T0; |
| 1665 |
} |
| 1666 |
|
| 1667 |
void helper_invlpg(unsigned int addr) |
| 1668 |
{
|
| 1669 |
cpu_x86_flush_tlb(env, addr); |
| 1670 |
} |
| 1671 |
|
| 1672 |
/* rdtsc */
|
| 1673 |
#ifndef __i386__
|
| 1674 |
uint64_t emu_time; |
| 1675 |
#endif
|
| 1676 |
|
| 1677 |
void helper_rdtsc(void) |
| 1678 |
{
|
| 1679 |
uint64_t val; |
| 1680 |
#ifdef __i386__
|
| 1681 |
asm("rdtsc" : "=A" (val)); |
| 1682 |
#else
|
| 1683 |
/* better than nothing: the time increases */
|
| 1684 |
val = emu_time++; |
| 1685 |
#endif
|
| 1686 |
EAX = val; |
| 1687 |
EDX = val >> 32;
|
| 1688 |
} |
| 1689 |
|
| 1690 |
void helper_wrmsr(void) |
| 1691 |
{
|
| 1692 |
switch(ECX) {
|
| 1693 |
case MSR_IA32_SYSENTER_CS:
|
| 1694 |
env->sysenter_cs = EAX & 0xffff;
|
| 1695 |
break;
|
| 1696 |
case MSR_IA32_SYSENTER_ESP:
|
| 1697 |
env->sysenter_esp = EAX; |
| 1698 |
break;
|
| 1699 |
case MSR_IA32_SYSENTER_EIP:
|
| 1700 |
env->sysenter_eip = EAX; |
| 1701 |
break;
|
| 1702 |
default:
|
| 1703 |
/* XXX: exception ? */
|
| 1704 |
break;
|
| 1705 |
} |
| 1706 |
} |
| 1707 |
|
| 1708 |
void helper_rdmsr(void) |
| 1709 |
{
|
| 1710 |
switch(ECX) {
|
| 1711 |
case MSR_IA32_SYSENTER_CS:
|
| 1712 |
EAX = env->sysenter_cs; |
| 1713 |
EDX = 0;
|
| 1714 |
break;
|
| 1715 |
case MSR_IA32_SYSENTER_ESP:
|
| 1716 |
EAX = env->sysenter_esp; |
| 1717 |
EDX = 0;
|
| 1718 |
break;
|
| 1719 |
case MSR_IA32_SYSENTER_EIP:
|
| 1720 |
EAX = env->sysenter_eip; |
| 1721 |
EDX = 0;
|
| 1722 |
break;
|
| 1723 |
default:
|
| 1724 |
/* XXX: exception ? */
|
| 1725 |
break;
|
| 1726 |
} |
| 1727 |
} |
| 1728 |
|
| 1729 |
void helper_lsl(void) |
| 1730 |
{
|
| 1731 |
unsigned int selector, limit; |
| 1732 |
uint32_t e1, e2; |
| 1733 |
int rpl, dpl, cpl, type;
|
| 1734 |
|
| 1735 |
CC_SRC = cc_table[CC_OP].compute_all() & ~CC_Z; |
| 1736 |
selector = T0 & 0xffff;
|
| 1737 |
if (load_segment(&e1, &e2, selector) != 0) |
| 1738 |
return;
|
| 1739 |
rpl = selector & 3;
|
| 1740 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 1741 |
cpl = env->hflags & HF_CPL_MASK; |
| 1742 |
if (e2 & DESC_S_MASK) {
|
| 1743 |
if ((e2 & DESC_CS_MASK) && (e2 & DESC_C_MASK)) {
|
| 1744 |
/* conforming */
|
| 1745 |
} else {
|
| 1746 |
if (dpl < cpl || dpl < rpl)
|
| 1747 |
return;
|
| 1748 |
} |
| 1749 |
} else {
|
| 1750 |
type = (e2 >> DESC_TYPE_SHIFT) & 0xf;
|
| 1751 |
switch(type) {
|
| 1752 |
case 1: |
| 1753 |
case 2: |
| 1754 |
case 3: |
| 1755 |
case 9: |
| 1756 |
case 11: |
| 1757 |
break;
|
| 1758 |
default:
|
| 1759 |
return;
|
| 1760 |
} |
| 1761 |
if (dpl < cpl || dpl < rpl)
|
| 1762 |
return;
|
| 1763 |
} |
| 1764 |
limit = get_seg_limit(e1, e2); |
| 1765 |
T1 = limit; |
| 1766 |
CC_SRC |= CC_Z; |
| 1767 |
} |
| 1768 |
|
| 1769 |
void helper_lar(void) |
| 1770 |
{
|
| 1771 |
unsigned int selector; |
| 1772 |
uint32_t e1, e2; |
| 1773 |
int rpl, dpl, cpl, type;
|
| 1774 |
|
| 1775 |
CC_SRC = cc_table[CC_OP].compute_all() & ~CC_Z; |
| 1776 |
selector = T0 & 0xffff;
|
| 1777 |
if ((selector & 0xfffc) == 0) |
| 1778 |
return;
|
| 1779 |
if (load_segment(&e1, &e2, selector) != 0) |
| 1780 |
return;
|
| 1781 |
rpl = selector & 3;
|
| 1782 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 1783 |
cpl = env->hflags & HF_CPL_MASK; |
| 1784 |
if (e2 & DESC_S_MASK) {
|
| 1785 |
if ((e2 & DESC_CS_MASK) && (e2 & DESC_C_MASK)) {
|
| 1786 |
/* conforming */
|
| 1787 |
} else {
|
| 1788 |
if (dpl < cpl || dpl < rpl)
|
| 1789 |
return;
|
| 1790 |
} |
| 1791 |
} else {
|
| 1792 |
type = (e2 >> DESC_TYPE_SHIFT) & 0xf;
|
| 1793 |
switch(type) {
|
| 1794 |
case 1: |
| 1795 |
case 2: |
| 1796 |
case 3: |
| 1797 |
case 4: |
| 1798 |
case 5: |
| 1799 |
case 9: |
| 1800 |
case 11: |
| 1801 |
case 12: |
| 1802 |
break;
|
| 1803 |
default:
|
| 1804 |
return;
|
| 1805 |
} |
| 1806 |
if (dpl < cpl || dpl < rpl)
|
| 1807 |
return;
|
| 1808 |
} |
| 1809 |
T1 = e2 & 0x00f0ff00;
|
| 1810 |
CC_SRC |= CC_Z; |
| 1811 |
} |
| 1812 |
|
| 1813 |
void helper_verr(void) |
| 1814 |
{
|
| 1815 |
unsigned int selector; |
| 1816 |
uint32_t e1, e2; |
| 1817 |
int rpl, dpl, cpl;
|
| 1818 |
|
| 1819 |
CC_SRC = cc_table[CC_OP].compute_all() & ~CC_Z; |
| 1820 |
selector = T0 & 0xffff;
|
| 1821 |
if ((selector & 0xfffc) == 0) |
| 1822 |
return;
|
| 1823 |
if (load_segment(&e1, &e2, selector) != 0) |
| 1824 |
return;
|
| 1825 |
if (!(e2 & DESC_S_MASK))
|
| 1826 |
return;
|
| 1827 |
rpl = selector & 3;
|
| 1828 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 1829 |
cpl = env->hflags & HF_CPL_MASK; |
| 1830 |
if (e2 & DESC_CS_MASK) {
|
| 1831 |
if (!(e2 & DESC_R_MASK))
|
| 1832 |
return;
|
| 1833 |
if (!(e2 & DESC_C_MASK)) {
|
| 1834 |
if (dpl < cpl || dpl < rpl)
|
| 1835 |
return;
|
| 1836 |
} |
| 1837 |
} else {
|
| 1838 |
if (dpl < cpl || dpl < rpl)
|
| 1839 |
return;
|
| 1840 |
} |
| 1841 |
/* ok */
|
| 1842 |
} |
| 1843 |
|
| 1844 |
void helper_verw(void) |
| 1845 |
{
|
| 1846 |
unsigned int selector; |
| 1847 |
uint32_t e1, e2; |
| 1848 |
int rpl, dpl, cpl;
|
| 1849 |
|
| 1850 |
CC_SRC = cc_table[CC_OP].compute_all() & ~CC_Z; |
| 1851 |
selector = T0 & 0xffff;
|
| 1852 |
if ((selector & 0xfffc) == 0) |
| 1853 |
return;
|
| 1854 |
if (load_segment(&e1, &e2, selector) != 0) |
| 1855 |
return;
|
| 1856 |
if (!(e2 & DESC_S_MASK))
|
| 1857 |
return;
|
| 1858 |
rpl = selector & 3;
|
| 1859 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 1860 |
cpl = env->hflags & HF_CPL_MASK; |
| 1861 |
if (e2 & DESC_CS_MASK) {
|
| 1862 |
return;
|
| 1863 |
} else {
|
| 1864 |
if (dpl < cpl || dpl < rpl)
|
| 1865 |
return;
|
| 1866 |
if (!(e2 & DESC_W_MASK))
|
| 1867 |
return;
|
| 1868 |
} |
| 1869 |
/* ok */
|
| 1870 |
} |
| 1871 |
|
| 1872 |
/* FPU helpers */
|
| 1873 |
|
| 1874 |
void helper_fldt_ST0_A0(void) |
| 1875 |
{
|
| 1876 |
int new_fpstt;
|
| 1877 |
new_fpstt = (env->fpstt - 1) & 7; |
| 1878 |
env->fpregs[new_fpstt] = helper_fldt((uint8_t *)A0); |
| 1879 |
env->fpstt = new_fpstt; |
| 1880 |
env->fptags[new_fpstt] = 0; /* validate stack entry */ |
| 1881 |
} |
| 1882 |
|
| 1883 |
void helper_fstt_ST0_A0(void) |
| 1884 |
{
|
| 1885 |
helper_fstt(ST0, (uint8_t *)A0); |
| 1886 |
} |
| 1887 |
|
| 1888 |
/* BCD ops */
|
| 1889 |
|
| 1890 |
#define MUL10(iv) ( iv + iv + (iv << 3) ) |
| 1891 |
|
| 1892 |
void helper_fbld_ST0_A0(void) |
| 1893 |
{
|
| 1894 |
CPU86_LDouble tmp; |
| 1895 |
uint64_t val; |
| 1896 |
unsigned int v; |
| 1897 |
int i;
|
| 1898 |
|
| 1899 |
val = 0;
|
| 1900 |
for(i = 8; i >= 0; i--) { |
| 1901 |
v = ldub((uint8_t *)A0 + i); |
| 1902 |
val = (val * 100) + ((v >> 4) * 10) + (v & 0xf); |
| 1903 |
} |
| 1904 |
tmp = val; |
| 1905 |
if (ldub((uint8_t *)A0 + 9) & 0x80) |
| 1906 |
tmp = -tmp; |
| 1907 |
fpush(); |
| 1908 |
ST0 = tmp; |
| 1909 |
} |
| 1910 |
|
| 1911 |
void helper_fbst_ST0_A0(void) |
| 1912 |
{
|
| 1913 |
CPU86_LDouble tmp; |
| 1914 |
int v;
|
| 1915 |
uint8_t *mem_ref, *mem_end; |
| 1916 |
int64_t val; |
| 1917 |
|
| 1918 |
tmp = rint(ST0); |
| 1919 |
val = (int64_t)tmp; |
| 1920 |
mem_ref = (uint8_t *)A0; |
| 1921 |
mem_end = mem_ref + 9;
|
| 1922 |
if (val < 0) { |
| 1923 |
stb(mem_end, 0x80);
|
| 1924 |
val = -val; |
| 1925 |
} else {
|
| 1926 |
stb(mem_end, 0x00);
|
| 1927 |
} |
| 1928 |
while (mem_ref < mem_end) {
|
| 1929 |
if (val == 0) |
| 1930 |
break;
|
| 1931 |
v = val % 100;
|
| 1932 |
val = val / 100;
|
| 1933 |
v = ((v / 10) << 4) | (v % 10); |
| 1934 |
stb(mem_ref++, v); |
| 1935 |
} |
| 1936 |
while (mem_ref < mem_end) {
|
| 1937 |
stb(mem_ref++, 0);
|
| 1938 |
} |
| 1939 |
} |
| 1940 |
|
| 1941 |
void helper_f2xm1(void) |
| 1942 |
{
|
| 1943 |
ST0 = pow(2.0,ST0) - 1.0; |
| 1944 |
} |
| 1945 |
|
| 1946 |
void helper_fyl2x(void) |
| 1947 |
{
|
| 1948 |
CPU86_LDouble fptemp; |
| 1949 |
|
| 1950 |
fptemp = ST0; |
| 1951 |
if (fptemp>0.0){ |
| 1952 |
fptemp = log(fptemp)/log(2.0); /* log2(ST) */ |
| 1953 |
ST1 *= fptemp; |
| 1954 |
fpop(); |
| 1955 |
} else {
|
| 1956 |
env->fpus &= (~0x4700);
|
| 1957 |
env->fpus |= 0x400;
|
| 1958 |
} |
| 1959 |
} |
| 1960 |
|
| 1961 |
void helper_fptan(void) |
| 1962 |
{
|
| 1963 |
CPU86_LDouble fptemp; |
| 1964 |
|
| 1965 |
fptemp = ST0; |
| 1966 |
if((fptemp > MAXTAN)||(fptemp < -MAXTAN)) {
|
| 1967 |
env->fpus |= 0x400;
|
| 1968 |
} else {
|
| 1969 |
ST0 = tan(fptemp); |
| 1970 |
fpush(); |
| 1971 |
ST0 = 1.0; |
| 1972 |
env->fpus &= (~0x400); /* C2 <-- 0 */ |
| 1973 |
/* the above code is for |arg| < 2**52 only */
|
| 1974 |
} |
| 1975 |
} |
| 1976 |
|
| 1977 |
void helper_fpatan(void) |
| 1978 |
{
|
| 1979 |
CPU86_LDouble fptemp, fpsrcop; |
| 1980 |
|
| 1981 |
fpsrcop = ST1; |
| 1982 |
fptemp = ST0; |
| 1983 |
ST1 = atan2(fpsrcop,fptemp); |
| 1984 |
fpop(); |
| 1985 |
} |
| 1986 |
|
| 1987 |
void helper_fxtract(void) |
| 1988 |
{
|
| 1989 |
CPU86_LDoubleU temp; |
| 1990 |
unsigned int expdif; |
| 1991 |
|
| 1992 |
temp.d = ST0; |
| 1993 |
expdif = EXPD(temp) - EXPBIAS; |
| 1994 |
/*DP exponent bias*/
|
| 1995 |
ST0 = expdif; |
| 1996 |
fpush(); |
| 1997 |
BIASEXPONENT(temp); |
| 1998 |
ST0 = temp.d; |
| 1999 |
} |
| 2000 |
|
| 2001 |
void helper_fprem1(void) |
| 2002 |
{
|
| 2003 |
CPU86_LDouble dblq, fpsrcop, fptemp; |
| 2004 |
CPU86_LDoubleU fpsrcop1, fptemp1; |
| 2005 |
int expdif;
|
| 2006 |
int q;
|
| 2007 |
|
| 2008 |
fpsrcop = ST0; |
| 2009 |
fptemp = ST1; |
| 2010 |
fpsrcop1.d = fpsrcop; |
| 2011 |
fptemp1.d = fptemp; |
| 2012 |
expdif = EXPD(fpsrcop1) - EXPD(fptemp1); |
| 2013 |
if (expdif < 53) { |
| 2014 |
dblq = fpsrcop / fptemp; |
| 2015 |
dblq = (dblq < 0.0)? ceil(dblq): floor(dblq); |
| 2016 |
ST0 = fpsrcop - fptemp*dblq; |
| 2017 |
q = (int)dblq; /* cutting off top bits is assumed here */ |
| 2018 |
env->fpus &= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */ |
| 2019 |
/* (C0,C1,C3) <-- (q2,q1,q0) */
|
| 2020 |
env->fpus |= (q&0x4) << 6; /* (C0) <-- q2 */ |
| 2021 |
env->fpus |= (q&0x2) << 8; /* (C1) <-- q1 */ |
| 2022 |
env->fpus |= (q&0x1) << 14; /* (C3) <-- q0 */ |
| 2023 |
} else {
|
| 2024 |
env->fpus |= 0x400; /* C2 <-- 1 */ |
| 2025 |
fptemp = pow(2.0, expdif-50); |
| 2026 |
fpsrcop = (ST0 / ST1) / fptemp; |
| 2027 |
/* fpsrcop = integer obtained by rounding to the nearest */
|
| 2028 |
fpsrcop = (fpsrcop-floor(fpsrcop) < ceil(fpsrcop)-fpsrcop)? |
| 2029 |
floor(fpsrcop): ceil(fpsrcop); |
| 2030 |
ST0 -= (ST1 * fpsrcop * fptemp); |
| 2031 |
} |
| 2032 |
} |
| 2033 |
|
| 2034 |
void helper_fprem(void) |
| 2035 |
{
|
| 2036 |
CPU86_LDouble dblq, fpsrcop, fptemp; |
| 2037 |
CPU86_LDoubleU fpsrcop1, fptemp1; |
| 2038 |
int expdif;
|
| 2039 |
int q;
|
| 2040 |
|
| 2041 |
fpsrcop = ST0; |
| 2042 |
fptemp = ST1; |
| 2043 |
fpsrcop1.d = fpsrcop; |
| 2044 |
fptemp1.d = fptemp; |
| 2045 |
expdif = EXPD(fpsrcop1) - EXPD(fptemp1); |
| 2046 |
if ( expdif < 53 ) { |
| 2047 |
dblq = fpsrcop / fptemp; |
| 2048 |
dblq = (dblq < 0.0)? ceil(dblq): floor(dblq); |
| 2049 |
ST0 = fpsrcop - fptemp*dblq; |
| 2050 |
q = (int)dblq; /* cutting off top bits is assumed here */ |
| 2051 |
env->fpus &= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */ |
| 2052 |
/* (C0,C1,C3) <-- (q2,q1,q0) */
|
| 2053 |
env->fpus |= (q&0x4) << 6; /* (C0) <-- q2 */ |
| 2054 |
env->fpus |= (q&0x2) << 8; /* (C1) <-- q1 */ |
| 2055 |
env->fpus |= (q&0x1) << 14; /* (C3) <-- q0 */ |
| 2056 |
} else {
|
| 2057 |
env->fpus |= 0x400; /* C2 <-- 1 */ |
| 2058 |
fptemp = pow(2.0, expdif-50); |
| 2059 |
fpsrcop = (ST0 / ST1) / fptemp; |
| 2060 |
/* fpsrcop = integer obtained by chopping */
|
| 2061 |
fpsrcop = (fpsrcop < 0.0)? |
| 2062 |
-(floor(fabs(fpsrcop))): floor(fpsrcop); |
| 2063 |
ST0 -= (ST1 * fpsrcop * fptemp); |
| 2064 |
} |
| 2065 |
} |
| 2066 |
|
| 2067 |
void helper_fyl2xp1(void) |
| 2068 |
{
|
| 2069 |
CPU86_LDouble fptemp; |
| 2070 |
|
| 2071 |
fptemp = ST0; |
| 2072 |
if ((fptemp+1.0)>0.0) { |
| 2073 |
fptemp = log(fptemp+1.0) / log(2.0); /* log2(ST+1.0) */ |
| 2074 |
ST1 *= fptemp; |
| 2075 |
fpop(); |
| 2076 |
} else {
|
| 2077 |
env->fpus &= (~0x4700);
|
| 2078 |
env->fpus |= 0x400;
|
| 2079 |
} |
| 2080 |
} |
| 2081 |
|
| 2082 |
void helper_fsqrt(void) |
| 2083 |
{
|
| 2084 |
CPU86_LDouble fptemp; |
| 2085 |
|
| 2086 |
fptemp = ST0; |
| 2087 |
if (fptemp<0.0) { |
| 2088 |
env->fpus &= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */ |
| 2089 |
env->fpus |= 0x400;
|
| 2090 |
} |
| 2091 |
ST0 = sqrt(fptemp); |
| 2092 |
} |
| 2093 |
|
| 2094 |
void helper_fsincos(void) |
| 2095 |
{
|
| 2096 |
CPU86_LDouble fptemp; |
| 2097 |
|
| 2098 |
fptemp = ST0; |
| 2099 |
if ((fptemp > MAXTAN)||(fptemp < -MAXTAN)) {
|
| 2100 |
env->fpus |= 0x400;
|
| 2101 |
} else {
|
| 2102 |
ST0 = sin(fptemp); |
| 2103 |
fpush(); |
| 2104 |
ST0 = cos(fptemp); |
| 2105 |
env->fpus &= (~0x400); /* C2 <-- 0 */ |
| 2106 |
/* the above code is for |arg| < 2**63 only */
|
| 2107 |
} |
| 2108 |
} |
| 2109 |
|
| 2110 |
void helper_frndint(void) |
| 2111 |
{
|
| 2112 |
CPU86_LDouble a; |
| 2113 |
|
| 2114 |
a = ST0; |
| 2115 |
#ifdef __arm__
|
| 2116 |
switch(env->fpuc & RC_MASK) {
|
| 2117 |
default:
|
| 2118 |
case RC_NEAR:
|
| 2119 |
asm("rndd %0, %1" : "=f" (a) : "f"(a)); |
| 2120 |
break;
|
| 2121 |
case RC_DOWN:
|
| 2122 |
asm("rnddm %0, %1" : "=f" (a) : "f"(a)); |
| 2123 |
break;
|
| 2124 |
case RC_UP:
|
| 2125 |
asm("rnddp %0, %1" : "=f" (a) : "f"(a)); |
| 2126 |
break;
|
| 2127 |
case RC_CHOP:
|
| 2128 |
asm("rnddz %0, %1" : "=f" (a) : "f"(a)); |
| 2129 |
break;
|
| 2130 |
} |
| 2131 |
#else
|
| 2132 |
a = rint(a); |
| 2133 |
#endif
|
| 2134 |
ST0 = a; |
| 2135 |
} |
| 2136 |
|
| 2137 |
void helper_fscale(void) |
| 2138 |
{
|
| 2139 |
CPU86_LDouble fpsrcop, fptemp; |
| 2140 |
|
| 2141 |
fpsrcop = 2.0; |
| 2142 |
fptemp = pow(fpsrcop,ST1); |
| 2143 |
ST0 *= fptemp; |
| 2144 |
} |
| 2145 |
|
| 2146 |
void helper_fsin(void) |
| 2147 |
{
|
| 2148 |
CPU86_LDouble fptemp; |
| 2149 |
|
| 2150 |
fptemp = ST0; |
| 2151 |
if ((fptemp > MAXTAN)||(fptemp < -MAXTAN)) {
|
| 2152 |
env->fpus |= 0x400;
|
| 2153 |
} else {
|
| 2154 |
ST0 = sin(fptemp); |
| 2155 |
env->fpus &= (~0x400); /* C2 <-- 0 */ |
| 2156 |
/* the above code is for |arg| < 2**53 only */
|
| 2157 |
} |
| 2158 |
} |
| 2159 |
|
| 2160 |
void helper_fcos(void) |
| 2161 |
{
|
| 2162 |
CPU86_LDouble fptemp; |
| 2163 |
|
| 2164 |
fptemp = ST0; |
| 2165 |
if((fptemp > MAXTAN)||(fptemp < -MAXTAN)) {
|
| 2166 |
env->fpus |= 0x400;
|
| 2167 |
} else {
|
| 2168 |
ST0 = cos(fptemp); |
| 2169 |
env->fpus &= (~0x400); /* C2 <-- 0 */ |
| 2170 |
/* the above code is for |arg5 < 2**63 only */
|
| 2171 |
} |
| 2172 |
} |
| 2173 |
|
| 2174 |
void helper_fxam_ST0(void) |
| 2175 |
{
|
| 2176 |
CPU86_LDoubleU temp; |
| 2177 |
int expdif;
|
| 2178 |
|
| 2179 |
temp.d = ST0; |
| 2180 |
|
| 2181 |
env->fpus &= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */ |
| 2182 |
if (SIGND(temp))
|
| 2183 |
env->fpus |= 0x200; /* C1 <-- 1 */ |
| 2184 |
|
| 2185 |
expdif = EXPD(temp); |
| 2186 |
if (expdif == MAXEXPD) {
|
| 2187 |
if (MANTD(temp) == 0) |
| 2188 |
env->fpus |= 0x500 /*Infinity*/; |
| 2189 |
else
|
| 2190 |
env->fpus |= 0x100 /*NaN*/; |
| 2191 |
} else if (expdif == 0) { |
| 2192 |
if (MANTD(temp) == 0) |
| 2193 |
env->fpus |= 0x4000 /*Zero*/; |
| 2194 |
else
|
| 2195 |
env->fpus |= 0x4400 /*Denormal*/; |
| 2196 |
} else {
|
| 2197 |
env->fpus |= 0x400;
|
| 2198 |
} |
| 2199 |
} |
| 2200 |
|
| 2201 |
void helper_fstenv(uint8_t *ptr, int data32) |
| 2202 |
{
|
| 2203 |
int fpus, fptag, exp, i;
|
| 2204 |
uint64_t mant; |
| 2205 |
CPU86_LDoubleU tmp; |
| 2206 |
|
| 2207 |
fpus = (env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11; |
| 2208 |
fptag = 0;
|
| 2209 |
for (i=7; i>=0; i--) { |
| 2210 |
fptag <<= 2;
|
| 2211 |
if (env->fptags[i]) {
|
| 2212 |
fptag |= 3;
|
| 2213 |
} else {
|
| 2214 |
tmp.d = env->fpregs[i]; |
| 2215 |
exp = EXPD(tmp); |
| 2216 |
mant = MANTD(tmp); |
| 2217 |
if (exp == 0 && mant == 0) { |
| 2218 |
/* zero */
|
| 2219 |
fptag |= 1;
|
| 2220 |
} else if (exp == 0 || exp == MAXEXPD |
| 2221 |
#ifdef USE_X86LDOUBLE
|
| 2222 |
|| (mant & (1LL << 63)) == 0 |
| 2223 |
#endif
|
| 2224 |
) {
|
| 2225 |
/* NaNs, infinity, denormal */
|
| 2226 |
fptag |= 2;
|
| 2227 |
} |
| 2228 |
} |
| 2229 |
} |
| 2230 |
if (data32) {
|
| 2231 |
/* 32 bit */
|
| 2232 |
stl(ptr, env->fpuc); |
| 2233 |
stl(ptr + 4, fpus);
|
| 2234 |
stl(ptr + 8, fptag);
|
| 2235 |
stl(ptr + 12, 0); |
| 2236 |
stl(ptr + 16, 0); |
| 2237 |
stl(ptr + 20, 0); |
| 2238 |
stl(ptr + 24, 0); |
| 2239 |
} else {
|
| 2240 |
/* 16 bit */
|
| 2241 |
stw(ptr, env->fpuc); |
| 2242 |
stw(ptr + 2, fpus);
|
| 2243 |
stw(ptr + 4, fptag);
|
| 2244 |
stw(ptr + 6, 0); |
| 2245 |
stw(ptr + 8, 0); |
| 2246 |
stw(ptr + 10, 0); |
| 2247 |
stw(ptr + 12, 0); |
| 2248 |
} |
| 2249 |
} |
| 2250 |
|
| 2251 |
void helper_fldenv(uint8_t *ptr, int data32) |
| 2252 |
{
|
| 2253 |
int i, fpus, fptag;
|
| 2254 |
|
| 2255 |
if (data32) {
|
| 2256 |
env->fpuc = lduw(ptr); |
| 2257 |
fpus = lduw(ptr + 4);
|
| 2258 |
fptag = lduw(ptr + 8);
|
| 2259 |
} |
| 2260 |
else {
|
| 2261 |
env->fpuc = lduw(ptr); |
| 2262 |
fpus = lduw(ptr + 2);
|
| 2263 |
fptag = lduw(ptr + 4);
|
| 2264 |
} |
| 2265 |
env->fpstt = (fpus >> 11) & 7; |
| 2266 |
env->fpus = fpus & ~0x3800;
|
| 2267 |
for(i = 0;i < 7; i++) { |
| 2268 |
env->fptags[i] = ((fptag & 3) == 3); |
| 2269 |
fptag >>= 2;
|
| 2270 |
} |
| 2271 |
} |
| 2272 |
|
| 2273 |
void helper_fsave(uint8_t *ptr, int data32) |
| 2274 |
{
|
| 2275 |
CPU86_LDouble tmp; |
| 2276 |
int i;
|
| 2277 |
|
| 2278 |
helper_fstenv(ptr, data32); |
| 2279 |
|
| 2280 |
ptr += (14 << data32);
|
| 2281 |
for(i = 0;i < 8; i++) { |
| 2282 |
tmp = ST(i); |
| 2283 |
helper_fstt(tmp, ptr); |
| 2284 |
ptr += 10;
|
| 2285 |
} |
| 2286 |
|
| 2287 |
/* fninit */
|
| 2288 |
env->fpus = 0;
|
| 2289 |
env->fpstt = 0;
|
| 2290 |
env->fpuc = 0x37f;
|
| 2291 |
env->fptags[0] = 1; |
| 2292 |
env->fptags[1] = 1; |
| 2293 |
env->fptags[2] = 1; |
| 2294 |
env->fptags[3] = 1; |
| 2295 |
env->fptags[4] = 1; |
| 2296 |
env->fptags[5] = 1; |
| 2297 |
env->fptags[6] = 1; |
| 2298 |
env->fptags[7] = 1; |
| 2299 |
} |
| 2300 |
|
| 2301 |
void helper_frstor(uint8_t *ptr, int data32) |
| 2302 |
{
|
| 2303 |
CPU86_LDouble tmp; |
| 2304 |
int i;
|
| 2305 |
|
| 2306 |
helper_fldenv(ptr, data32); |
| 2307 |
ptr += (14 << data32);
|
| 2308 |
|
| 2309 |
for(i = 0;i < 8; i++) { |
| 2310 |
tmp = helper_fldt(ptr); |
| 2311 |
ST(i) = tmp; |
| 2312 |
ptr += 10;
|
| 2313 |
} |
| 2314 |
} |
| 2315 |
|
| 2316 |
#if !defined(CONFIG_USER_ONLY)
|
| 2317 |
|
| 2318 |
#define MMUSUFFIX _mmu
|
| 2319 |
#define GETPC() (__builtin_return_address(0)) |
| 2320 |
|
| 2321 |
#define SHIFT 0 |
| 2322 |
#include "softmmu_template.h" |
| 2323 |
|
| 2324 |
#define SHIFT 1 |
| 2325 |
#include "softmmu_template.h" |
| 2326 |
|
| 2327 |
#define SHIFT 2 |
| 2328 |
#include "softmmu_template.h" |
| 2329 |
|
| 2330 |
#define SHIFT 3 |
| 2331 |
#include "softmmu_template.h" |
| 2332 |
|
| 2333 |
#endif
|
| 2334 |
|
| 2335 |
/* try to fill the TLB and return an exception if error. If retaddr is
|
| 2336 |
NULL, it means that the function was called in C code (i.e. not
|
| 2337 |
from generated code or from helper.c) */
|
| 2338 |
/* XXX: fix it to restore all registers */
|
| 2339 |
void tlb_fill(unsigned long addr, int is_write, int is_user, void *retaddr) |
| 2340 |
{
|
| 2341 |
TranslationBlock *tb; |
| 2342 |
int ret;
|
| 2343 |
unsigned long pc; |
| 2344 |
CPUX86State *saved_env; |
| 2345 |
|
| 2346 |
/* XXX: hack to restore env in all cases, even if not called from
|
| 2347 |
generated code */
|
| 2348 |
saved_env = env; |
| 2349 |
env = cpu_single_env; |
| 2350 |
if (is_write && page_unprotect(addr)) {
|
| 2351 |
/* nothing more to do: the page was write protected because
|
| 2352 |
there was code in it. page_unprotect() flushed the code. */
|
| 2353 |
} |
| 2354 |
|
| 2355 |
ret = cpu_x86_handle_mmu_fault(env, addr, is_write, is_user, 1);
|
| 2356 |
if (ret) {
|
| 2357 |
if (retaddr) {
|
| 2358 |
/* now we have a real cpu fault */
|
| 2359 |
pc = (unsigned long)retaddr; |
| 2360 |
tb = tb_find_pc(pc); |
| 2361 |
if (tb) {
|
| 2362 |
/* the PC is inside the translated code. It means that we have
|
| 2363 |
a virtual CPU fault */
|
| 2364 |
cpu_restore_state(tb, env, pc); |
| 2365 |
} |
| 2366 |
} |
| 2367 |
raise_exception_err(EXCP0E_PAGE, env->error_code); |
| 2368 |
} |
| 2369 |
env = saved_env; |
| 2370 |
} |