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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-i386.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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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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#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(env->tr.base + index); |
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*ss_ptr = lduw(env->tr.base + index + 2);
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} else {
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*esp_ptr = ldl(env->tr.base + index); |
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*ss_ptr = lduw(env->tr.base + index + 4);
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} |
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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(ptr); |
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*e2_ptr = ldl(ptr + 4);
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return 0; |
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} |
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|
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|
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/* protected mode interrupt */
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static void do_interrupt_protected(int intno, int is_int, int error_code, |
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unsigned int next_eip) |
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{
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SegmentCache *dt; |
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uint8_t *ptr, *ssp; |
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int type, dpl, cpl, selector, ss_dpl;
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int has_error_code, new_stack, shift;
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uint32_t e1, e2, offset, ss, esp, ss_e1, ss_e2, push_size; |
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uint32_t old_cs, old_ss, old_esp, old_eip; |
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|
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dt = &env->idt; |
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if (intno * 8 + 7 > dt->limit) |
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raise_exception_err(EXCP0D_GPF, intno * 8 + 2); |
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ptr = dt->base + intno * 8;
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e1 = ldl(ptr); |
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e2 = ldl(ptr + 4);
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/* check gate type */
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type = (e2 >> DESC_TYPE_SHIFT) & 0x1f;
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switch(type) {
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case 5: /* task gate */ |
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cpu_abort(env, "task gate not supported");
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break;
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case 6: /* 286 interrupt gate */ |
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case 7: /* 286 trap gate */ |
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case 14: /* 386 interrupt gate */ |
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case 15: /* 386 trap gate */ |
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break;
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default:
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raise_exception_err(EXCP0D_GPF, intno * 8 + 2); |
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break;
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} |
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dpl = (e2 >> DESC_DPL_SHIFT) & 3;
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if (env->eflags & VM_MASK)
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cpl = 3;
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else
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cpl = env->segs[R_CS].selector & 3;
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/* check privledge if software int */
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if (is_int && dpl < cpl)
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raise_exception_err(EXCP0D_GPF, intno * 8 + 2); |
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/* check valid bit */
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if (!(e2 & DESC_P_MASK))
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raise_exception_err(EXCP0B_NOSEG, intno * 8 + 2); |
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selector = e1 >> 16;
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offset = (e2 & 0xffff0000) | (e1 & 0x0000ffff); |
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if ((selector & 0xfffc) == 0) |
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raise_exception_err(EXCP0D_GPF, 0);
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|
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if (load_segment(&e1, &e2, selector) != 0) |
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raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
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if (!(e2 & DESC_S_MASK) || !(e2 & (DESC_CS_MASK)))
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raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
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dpl = (e2 >> DESC_DPL_SHIFT) & 3;
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if (dpl > cpl)
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raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
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if (!(e2 & DESC_P_MASK))
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raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc);
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if (!(e2 & DESC_C_MASK) && dpl < cpl) {
|
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/* to inner priviledge */
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get_ss_esp_from_tss(&ss, &esp, dpl); |
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if ((ss & 0xfffc) == 0) |
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raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
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if ((ss & 3) != dpl) |
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raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
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if (load_segment(&ss_e1, &ss_e2, ss) != 0) |
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raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
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ss_dpl = (ss_e2 >> DESC_DPL_SHIFT) & 3;
|
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if (ss_dpl != dpl)
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raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
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if (!(ss_e2 & DESC_S_MASK) ||
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(ss_e2 & DESC_CS_MASK) || |
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!(ss_e2 & DESC_W_MASK)) |
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raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
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if (!(ss_e2 & DESC_P_MASK))
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raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
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new_stack = 1;
|
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} else if ((e2 & DESC_C_MASK) || dpl == cpl) { |
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/* to same priviledge */
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new_stack = 0;
|
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} else {
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raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
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new_stack = 0; /* avoid warning */ |
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} |
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|
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shift = type >> 3;
|
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has_error_code = 0;
|
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if (!is_int) {
|
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switch(intno) {
|
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case 8: |
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case 10: |
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case 11: |
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case 12: |
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case 13: |
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case 14: |
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case 17: |
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has_error_code = 1;
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break;
|
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} |
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} |
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push_size = 6 + (new_stack << 2) + (has_error_code << 1); |
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if (env->eflags & VM_MASK)
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push_size += 8;
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push_size <<= shift; |
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|
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/* XXX: check that enough room is available */
|
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if (new_stack) {
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old_esp = env->regs[R_ESP]; |
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old_ss = env->segs[R_SS].selector; |
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load_seg(R_SS, ss, env->eip); |
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} else {
|
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old_esp = 0;
|
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old_ss = 0;
|
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esp = env->regs[R_ESP]; |
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} |
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if (is_int)
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old_eip = next_eip; |
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else
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old_eip = env->eip; |
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old_cs = env->segs[R_CS].selector; |
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load_seg(R_CS, selector, env->eip); |
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env->eip = offset; |
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env->regs[R_ESP] = esp - push_size; |
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ssp = env->segs[R_SS].base + esp; |
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if (shift == 1) { |
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int old_eflags;
|
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if (env->eflags & VM_MASK) {
|
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ssp -= 4;
|
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stl(ssp, env->segs[R_GS].selector); |
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ssp -= 4;
|
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stl(ssp, env->segs[R_FS].selector); |
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ssp -= 4;
|
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stl(ssp, env->segs[R_DS].selector); |
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ssp -= 4;
|
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stl(ssp, env->segs[R_ES].selector); |
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} |
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if (new_stack) {
|
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ssp -= 4;
|
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stl(ssp, old_ss); |
| 324 |
ssp -= 4;
|
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stl(ssp, old_esp); |
| 326 |
} |
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ssp -= 4;
|
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old_eflags = compute_eflags(); |
| 329 |
stl(ssp, old_eflags); |
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ssp -= 4;
|
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stl(ssp, old_cs); |
| 332 |
ssp -= 4;
|
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stl(ssp, old_eip); |
| 334 |
if (has_error_code) {
|
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ssp -= 4;
|
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stl(ssp, error_code); |
| 337 |
} |
| 338 |
} else {
|
| 339 |
if (new_stack) {
|
| 340 |
ssp -= 2;
|
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stw(ssp, old_ss); |
| 342 |
ssp -= 2;
|
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stw(ssp, old_esp); |
| 344 |
} |
| 345 |
ssp -= 2;
|
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stw(ssp, compute_eflags()); |
| 347 |
ssp -= 2;
|
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stw(ssp, old_cs); |
| 349 |
ssp -= 2;
|
| 350 |
stw(ssp, old_eip); |
| 351 |
if (has_error_code) {
|
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ssp -= 2;
|
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stw(ssp, error_code); |
| 354 |
} |
| 355 |
} |
| 356 |
|
| 357 |
/* interrupt gate clear IF mask */
|
| 358 |
if ((type & 1) == 0) { |
| 359 |
env->eflags &= ~IF_MASK; |
| 360 |
} |
| 361 |
env->eflags &= ~(TF_MASK | VM_MASK | RF_MASK | NT_MASK); |
| 362 |
} |
| 363 |
|
| 364 |
/* real mode interrupt */
|
| 365 |
static void do_interrupt_real(int intno, int is_int, int error_code, |
| 366 |
unsigned int next_eip) |
| 367 |
{
|
| 368 |
SegmentCache *dt; |
| 369 |
uint8_t *ptr, *ssp; |
| 370 |
int selector;
|
| 371 |
uint32_t offset, esp; |
| 372 |
uint32_t old_cs, old_eip; |
| 373 |
|
| 374 |
/* real mode (simpler !) */
|
| 375 |
dt = &env->idt; |
| 376 |
if (intno * 4 + 3 > dt->limit) |
| 377 |
raise_exception_err(EXCP0D_GPF, intno * 8 + 2); |
| 378 |
ptr = dt->base + intno * 4;
|
| 379 |
offset = lduw(ptr); |
| 380 |
selector = lduw(ptr + 2);
|
| 381 |
esp = env->regs[R_ESP]; |
| 382 |
ssp = env->segs[R_SS].base; |
| 383 |
if (is_int)
|
| 384 |
old_eip = next_eip; |
| 385 |
else
|
| 386 |
old_eip = env->eip; |
| 387 |
old_cs = env->segs[R_CS].selector; |
| 388 |
esp -= 2;
|
| 389 |
stw(ssp + (esp & 0xffff), compute_eflags());
|
| 390 |
esp -= 2;
|
| 391 |
stw(ssp + (esp & 0xffff), old_cs);
|
| 392 |
esp -= 2;
|
| 393 |
stw(ssp + (esp & 0xffff), old_eip);
|
| 394 |
|
| 395 |
/* update processor state */
|
| 396 |
env->regs[R_ESP] = (env->regs[R_ESP] & ~0xffff) | (esp & 0xffff); |
| 397 |
env->eip = offset; |
| 398 |
env->segs[R_CS].selector = selector; |
| 399 |
env->segs[R_CS].base = (uint8_t *)(selector << 4);
|
| 400 |
env->eflags &= ~(IF_MASK | TF_MASK | AC_MASK | RF_MASK); |
| 401 |
} |
| 402 |
|
| 403 |
/* fake user mode interrupt */
|
| 404 |
void do_interrupt_user(int intno, int is_int, int error_code, |
| 405 |
unsigned int next_eip) |
| 406 |
{
|
| 407 |
SegmentCache *dt; |
| 408 |
uint8_t *ptr; |
| 409 |
int dpl, cpl;
|
| 410 |
uint32_t e2; |
| 411 |
|
| 412 |
dt = &env->idt; |
| 413 |
ptr = dt->base + (intno * 8);
|
| 414 |
e2 = ldl(ptr + 4);
|
| 415 |
|
| 416 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 417 |
cpl = 3;
|
| 418 |
/* check privledge if software int */
|
| 419 |
if (is_int && dpl < cpl)
|
| 420 |
raise_exception_err(EXCP0D_GPF, intno * 8 + 2); |
| 421 |
|
| 422 |
/* Since we emulate only user space, we cannot do more than
|
| 423 |
exiting the emulation with the suitable exception and error
|
| 424 |
code */
|
| 425 |
if (is_int)
|
| 426 |
EIP = next_eip; |
| 427 |
} |
| 428 |
|
| 429 |
/*
|
| 430 |
* Begin excution of an interruption. is_int is TRUE if coming from
|
| 431 |
* the int instruction. next_eip is the EIP value AFTER the interrupt
|
| 432 |
* instruction. It is only relevant if is_int is TRUE.
|
| 433 |
*/
|
| 434 |
void do_interrupt(int intno, int is_int, int error_code, |
| 435 |
unsigned int next_eip) |
| 436 |
{
|
| 437 |
if (env->cr[0] & CR0_PE_MASK) { |
| 438 |
do_interrupt_protected(intno, is_int, error_code, next_eip); |
| 439 |
} else {
|
| 440 |
do_interrupt_real(intno, is_int, error_code, next_eip); |
| 441 |
} |
| 442 |
} |
| 443 |
|
| 444 |
/*
|
| 445 |
* Signal an interruption. It is executed in the main CPU loop.
|
| 446 |
* is_int is TRUE if coming from the int instruction. next_eip is the
|
| 447 |
* EIP value AFTER the interrupt instruction. It is only relevant if
|
| 448 |
* is_int is TRUE.
|
| 449 |
*/
|
| 450 |
void raise_interrupt(int intno, int is_int, int error_code, |
| 451 |
unsigned int next_eip) |
| 452 |
{
|
| 453 |
env->exception_index = intno; |
| 454 |
env->error_code = error_code; |
| 455 |
env->exception_is_int = is_int; |
| 456 |
env->exception_next_eip = next_eip; |
| 457 |
cpu_loop_exit(); |
| 458 |
} |
| 459 |
|
| 460 |
/* shortcuts to generate exceptions */
|
| 461 |
void raise_exception_err(int exception_index, int error_code) |
| 462 |
{
|
| 463 |
raise_interrupt(exception_index, 0, error_code, 0); |
| 464 |
} |
| 465 |
|
| 466 |
void raise_exception(int exception_index) |
| 467 |
{
|
| 468 |
raise_interrupt(exception_index, 0, 0, 0); |
| 469 |
} |
| 470 |
|
| 471 |
#ifdef BUGGY_GCC_DIV64
|
| 472 |
/* gcc 2.95.4 on PowerPC does not seem to like using __udivdi3, so we
|
| 473 |
call it from another function */
|
| 474 |
uint32_t div64(uint32_t *q_ptr, uint64_t num, uint32_t den) |
| 475 |
{
|
| 476 |
*q_ptr = num / den; |
| 477 |
return num % den;
|
| 478 |
} |
| 479 |
|
| 480 |
int32_t idiv64(int32_t *q_ptr, int64_t num, int32_t den) |
| 481 |
{
|
| 482 |
*q_ptr = num / den; |
| 483 |
return num % den;
|
| 484 |
} |
| 485 |
#endif
|
| 486 |
|
| 487 |
void helper_divl_EAX_T0(uint32_t eip)
|
| 488 |
{
|
| 489 |
unsigned int den, q, r; |
| 490 |
uint64_t num; |
| 491 |
|
| 492 |
num = EAX | ((uint64_t)EDX << 32);
|
| 493 |
den = T0; |
| 494 |
if (den == 0) { |
| 495 |
EIP = eip; |
| 496 |
raise_exception(EXCP00_DIVZ); |
| 497 |
} |
| 498 |
#ifdef BUGGY_GCC_DIV64
|
| 499 |
r = div64(&q, num, den); |
| 500 |
#else
|
| 501 |
q = (num / den); |
| 502 |
r = (num % den); |
| 503 |
#endif
|
| 504 |
EAX = q; |
| 505 |
EDX = r; |
| 506 |
} |
| 507 |
|
| 508 |
void helper_idivl_EAX_T0(uint32_t eip)
|
| 509 |
{
|
| 510 |
int den, q, r;
|
| 511 |
int64_t num; |
| 512 |
|
| 513 |
num = EAX | ((uint64_t)EDX << 32);
|
| 514 |
den = T0; |
| 515 |
if (den == 0) { |
| 516 |
EIP = eip; |
| 517 |
raise_exception(EXCP00_DIVZ); |
| 518 |
} |
| 519 |
#ifdef BUGGY_GCC_DIV64
|
| 520 |
r = idiv64(&q, num, den); |
| 521 |
#else
|
| 522 |
q = (num / den); |
| 523 |
r = (num % den); |
| 524 |
#endif
|
| 525 |
EAX = q; |
| 526 |
EDX = r; |
| 527 |
} |
| 528 |
|
| 529 |
void helper_cmpxchg8b(void) |
| 530 |
{
|
| 531 |
uint64_t d; |
| 532 |
int eflags;
|
| 533 |
|
| 534 |
eflags = cc_table[CC_OP].compute_all(); |
| 535 |
d = ldq((uint8_t *)A0); |
| 536 |
if (d == (((uint64_t)EDX << 32) | EAX)) { |
| 537 |
stq((uint8_t *)A0, ((uint64_t)ECX << 32) | EBX);
|
| 538 |
eflags |= CC_Z; |
| 539 |
} else {
|
| 540 |
EDX = d >> 32;
|
| 541 |
EAX = d; |
| 542 |
eflags &= ~CC_Z; |
| 543 |
} |
| 544 |
CC_SRC = eflags; |
| 545 |
} |
| 546 |
|
| 547 |
/* We simulate a pre-MMX pentium as in valgrind */
|
| 548 |
#define CPUID_FP87 (1 << 0) |
| 549 |
#define CPUID_VME (1 << 1) |
| 550 |
#define CPUID_DE (1 << 2) |
| 551 |
#define CPUID_PSE (1 << 3) |
| 552 |
#define CPUID_TSC (1 << 4) |
| 553 |
#define CPUID_MSR (1 << 5) |
| 554 |
#define CPUID_PAE (1 << 6) |
| 555 |
#define CPUID_MCE (1 << 7) |
| 556 |
#define CPUID_CX8 (1 << 8) |
| 557 |
#define CPUID_APIC (1 << 9) |
| 558 |
#define CPUID_SEP (1 << 11) /* sysenter/sysexit */ |
| 559 |
#define CPUID_MTRR (1 << 12) |
| 560 |
#define CPUID_PGE (1 << 13) |
| 561 |
#define CPUID_MCA (1 << 14) |
| 562 |
#define CPUID_CMOV (1 << 15) |
| 563 |
/* ... */
|
| 564 |
#define CPUID_MMX (1 << 23) |
| 565 |
#define CPUID_FXSR (1 << 24) |
| 566 |
#define CPUID_SSE (1 << 25) |
| 567 |
#define CPUID_SSE2 (1 << 26) |
| 568 |
|
| 569 |
void helper_cpuid(void) |
| 570 |
{
|
| 571 |
if (EAX == 0) { |
| 572 |
EAX = 1; /* max EAX index supported */ |
| 573 |
EBX = 0x756e6547;
|
| 574 |
ECX = 0x6c65746e;
|
| 575 |
EDX = 0x49656e69;
|
| 576 |
} else if (EAX == 1) { |
| 577 |
int family, model, stepping;
|
| 578 |
/* EAX = 1 info */
|
| 579 |
#if 0
|
| 580 |
/* pentium 75-200 */
|
| 581 |
family = 5;
|
| 582 |
model = 2;
|
| 583 |
stepping = 11;
|
| 584 |
#else
|
| 585 |
/* pentium pro */
|
| 586 |
family = 6;
|
| 587 |
model = 1;
|
| 588 |
stepping = 3;
|
| 589 |
#endif
|
| 590 |
EAX = (family << 8) | (model << 4) | stepping; |
| 591 |
EBX = 0;
|
| 592 |
ECX = 0;
|
| 593 |
EDX = CPUID_FP87 | CPUID_DE | CPUID_PSE | |
| 594 |
CPUID_TSC | CPUID_MSR | CPUID_MCE | |
| 595 |
CPUID_CX8 | CPUID_PGE | CPUID_CMOV; |
| 596 |
} |
| 597 |
} |
| 598 |
|
| 599 |
static inline void load_seg_cache(SegmentCache *sc, uint32_t e1, uint32_t e2) |
| 600 |
{
|
| 601 |
sc->base = (void *)((e1 >> 16) | ((e2 & 0xff) << 16) | (e2 & 0xff000000)); |
| 602 |
sc->limit = (e1 & 0xffff) | (e2 & 0x000f0000); |
| 603 |
if (e2 & DESC_G_MASK)
|
| 604 |
sc->limit = (sc->limit << 12) | 0xfff; |
| 605 |
sc->flags = e2; |
| 606 |
} |
| 607 |
|
| 608 |
void helper_lldt_T0(void) |
| 609 |
{
|
| 610 |
int selector;
|
| 611 |
SegmentCache *dt; |
| 612 |
uint32_t e1, e2; |
| 613 |
int index;
|
| 614 |
uint8_t *ptr; |
| 615 |
|
| 616 |
selector = T0 & 0xffff;
|
| 617 |
if ((selector & 0xfffc) == 0) { |
| 618 |
/* XXX: NULL selector case: invalid LDT */
|
| 619 |
env->ldt.base = NULL;
|
| 620 |
env->ldt.limit = 0;
|
| 621 |
} else {
|
| 622 |
if (selector & 0x4) |
| 623 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 624 |
dt = &env->gdt; |
| 625 |
index = selector & ~7;
|
| 626 |
if ((index + 7) > dt->limit) |
| 627 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 628 |
ptr = dt->base + index; |
| 629 |
e1 = ldl(ptr); |
| 630 |
e2 = ldl(ptr + 4);
|
| 631 |
if ((e2 & DESC_S_MASK) || ((e2 >> DESC_TYPE_SHIFT) & 0xf) != 2) |
| 632 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 633 |
if (!(e2 & DESC_P_MASK))
|
| 634 |
raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc);
|
| 635 |
load_seg_cache(&env->ldt, e1, e2); |
| 636 |
} |
| 637 |
env->ldt.selector = selector; |
| 638 |
} |
| 639 |
|
| 640 |
void helper_ltr_T0(void) |
| 641 |
{
|
| 642 |
int selector;
|
| 643 |
SegmentCache *dt; |
| 644 |
uint32_t e1, e2; |
| 645 |
int index, type;
|
| 646 |
uint8_t *ptr; |
| 647 |
|
| 648 |
selector = T0 & 0xffff;
|
| 649 |
if ((selector & 0xfffc) == 0) { |
| 650 |
/* NULL selector case: invalid LDT */
|
| 651 |
env->tr.base = NULL;
|
| 652 |
env->tr.limit = 0;
|
| 653 |
env->tr.flags = 0;
|
| 654 |
} else {
|
| 655 |
if (selector & 0x4) |
| 656 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 657 |
dt = &env->gdt; |
| 658 |
index = selector & ~7;
|
| 659 |
if ((index + 7) > dt->limit) |
| 660 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 661 |
ptr = dt->base + index; |
| 662 |
e1 = ldl(ptr); |
| 663 |
e2 = ldl(ptr + 4);
|
| 664 |
type = (e2 >> DESC_TYPE_SHIFT) & 0xf;
|
| 665 |
if ((e2 & DESC_S_MASK) ||
|
| 666 |
(type != 2 && type != 9)) |
| 667 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 668 |
if (!(e2 & DESC_P_MASK))
|
| 669 |
raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc);
|
| 670 |
load_seg_cache(&env->tr, e1, e2); |
| 671 |
e2 |= 0x00000200; /* set the busy bit */ |
| 672 |
stl(ptr + 4, e2);
|
| 673 |
} |
| 674 |
env->tr.selector = selector; |
| 675 |
} |
| 676 |
|
| 677 |
/* only works if protected mode and not VM86 */
|
| 678 |
void load_seg(int seg_reg, int selector, unsigned int cur_eip) |
| 679 |
{
|
| 680 |
SegmentCache *sc; |
| 681 |
uint32_t e1, e2; |
| 682 |
|
| 683 |
sc = &env->segs[seg_reg]; |
| 684 |
if ((selector & 0xfffc) == 0) { |
| 685 |
/* null selector case */
|
| 686 |
if (seg_reg == R_SS) {
|
| 687 |
EIP = cur_eip; |
| 688 |
raise_exception_err(EXCP0D_GPF, 0);
|
| 689 |
} else {
|
| 690 |
/* XXX: each access should trigger an exception */
|
| 691 |
sc->base = NULL;
|
| 692 |
sc->limit = 0;
|
| 693 |
sc->flags = 0;
|
| 694 |
} |
| 695 |
} else {
|
| 696 |
if (load_segment(&e1, &e2, selector) != 0) { |
| 697 |
EIP = cur_eip; |
| 698 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 699 |
} |
| 700 |
if (!(e2 & DESC_S_MASK) ||
|
| 701 |
(e2 & (DESC_CS_MASK | DESC_R_MASK)) == DESC_CS_MASK) {
|
| 702 |
EIP = cur_eip; |
| 703 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 704 |
} |
| 705 |
|
| 706 |
if (seg_reg == R_SS) {
|
| 707 |
if ((e2 & (DESC_CS_MASK | DESC_W_MASK)) == 0) { |
| 708 |
EIP = cur_eip; |
| 709 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 710 |
} |
| 711 |
} else {
|
| 712 |
if ((e2 & (DESC_CS_MASK | DESC_R_MASK)) == DESC_CS_MASK) {
|
| 713 |
EIP = cur_eip; |
| 714 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 715 |
} |
| 716 |
} |
| 717 |
|
| 718 |
if (!(e2 & DESC_P_MASK)) {
|
| 719 |
EIP = cur_eip; |
| 720 |
if (seg_reg == R_SS)
|
| 721 |
raise_exception_err(EXCP0C_STACK, selector & 0xfffc);
|
| 722 |
else
|
| 723 |
raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc);
|
| 724 |
} |
| 725 |
load_seg_cache(sc, e1, e2); |
| 726 |
#if 0
|
| 727 |
fprintf(logfile, "load_seg: sel=0x%04x base=0x%08lx limit=0x%08lx flags=%08x\n",
|
| 728 |
selector, (unsigned long)sc->base, sc->limit, sc->flags);
|
| 729 |
#endif
|
| 730 |
} |
| 731 |
sc->selector = selector; |
| 732 |
} |
| 733 |
|
| 734 |
/* protected mode jump */
|
| 735 |
void helper_ljmp_protected_T0_T1(void) |
| 736 |
{
|
| 737 |
int new_cs, new_eip;
|
| 738 |
SegmentCache sc1; |
| 739 |
uint32_t e1, e2, cpl, dpl, rpl; |
| 740 |
|
| 741 |
new_cs = T0; |
| 742 |
new_eip = T1; |
| 743 |
if ((new_cs & 0xfffc) == 0) |
| 744 |
raise_exception_err(EXCP0D_GPF, 0);
|
| 745 |
if (load_segment(&e1, &e2, new_cs) != 0) |
| 746 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 747 |
cpl = env->segs[R_CS].selector & 3;
|
| 748 |
if (e2 & DESC_S_MASK) {
|
| 749 |
if (!(e2 & DESC_CS_MASK))
|
| 750 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 751 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 752 |
if (e2 & DESC_CS_MASK) {
|
| 753 |
/* conforming code segment */
|
| 754 |
if (dpl > cpl)
|
| 755 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 756 |
} else {
|
| 757 |
/* non conforming code segment */
|
| 758 |
rpl = new_cs & 3;
|
| 759 |
if (rpl > cpl)
|
| 760 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 761 |
if (dpl != cpl)
|
| 762 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 763 |
} |
| 764 |
if (!(e2 & DESC_P_MASK))
|
| 765 |
raise_exception_err(EXCP0B_NOSEG, new_cs & 0xfffc);
|
| 766 |
load_seg_cache(&sc1, e1, e2); |
| 767 |
if (new_eip > sc1.limit)
|
| 768 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 769 |
env->segs[R_CS].base = sc1.base; |
| 770 |
env->segs[R_CS].limit = sc1.limit; |
| 771 |
env->segs[R_CS].flags = sc1.flags; |
| 772 |
env->segs[R_CS].selector = (new_cs & 0xfffc) | cpl;
|
| 773 |
EIP = new_eip; |
| 774 |
} else {
|
| 775 |
cpu_abort(env, "jmp to call/task gate not supported 0x%04x:0x%08x",
|
| 776 |
new_cs, new_eip); |
| 777 |
} |
| 778 |
} |
| 779 |
|
| 780 |
/* real mode call */
|
| 781 |
void helper_lcall_real_T0_T1(int shift, int next_eip) |
| 782 |
{
|
| 783 |
int new_cs, new_eip;
|
| 784 |
uint32_t esp, esp_mask; |
| 785 |
uint8_t *ssp; |
| 786 |
|
| 787 |
new_cs = T0; |
| 788 |
new_eip = T1; |
| 789 |
esp = env->regs[R_ESP]; |
| 790 |
esp_mask = 0xffffffff;
|
| 791 |
if (!(env->segs[R_SS].flags & DESC_B_MASK))
|
| 792 |
esp_mask = 0xffff;
|
| 793 |
ssp = env->segs[R_SS].base; |
| 794 |
if (shift) {
|
| 795 |
esp -= 4;
|
| 796 |
stl(ssp + (esp & esp_mask), env->segs[R_CS].selector); |
| 797 |
esp -= 4;
|
| 798 |
stl(ssp + (esp & esp_mask), next_eip); |
| 799 |
} else {
|
| 800 |
esp -= 2;
|
| 801 |
stw(ssp + (esp & esp_mask), env->segs[R_CS].selector); |
| 802 |
esp -= 2;
|
| 803 |
stw(ssp + (esp & esp_mask), next_eip); |
| 804 |
} |
| 805 |
|
| 806 |
if (!(env->segs[R_SS].flags & DESC_B_MASK))
|
| 807 |
env->regs[R_ESP] = (env->regs[R_ESP] & ~0xffff) | (esp & 0xffff); |
| 808 |
else
|
| 809 |
env->regs[R_ESP] = esp; |
| 810 |
env->eip = new_eip; |
| 811 |
env->segs[R_CS].selector = new_cs; |
| 812 |
env->segs[R_CS].base = (uint8_t *)(new_cs << 4);
|
| 813 |
} |
| 814 |
|
| 815 |
/* protected mode call */
|
| 816 |
void helper_lcall_protected_T0_T1(int shift, int next_eip) |
| 817 |
{
|
| 818 |
int new_cs, new_eip;
|
| 819 |
SegmentCache sc1; |
| 820 |
uint32_t e1, e2, cpl, dpl, rpl, selector, offset, param_count; |
| 821 |
uint32_t ss, ss_e1, ss_e2, push_size, sp, type, ss_dpl; |
| 822 |
uint32_t old_ss, old_esp, val, i; |
| 823 |
uint8_t *ssp, *old_ssp; |
| 824 |
|
| 825 |
new_cs = T0; |
| 826 |
new_eip = T1; |
| 827 |
if ((new_cs & 0xfffc) == 0) |
| 828 |
raise_exception_err(EXCP0D_GPF, 0);
|
| 829 |
if (load_segment(&e1, &e2, new_cs) != 0) |
| 830 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 831 |
cpl = env->segs[R_CS].selector & 3;
|
| 832 |
if (e2 & DESC_S_MASK) {
|
| 833 |
if (!(e2 & DESC_CS_MASK))
|
| 834 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 835 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 836 |
if (e2 & DESC_CS_MASK) {
|
| 837 |
/* conforming code segment */
|
| 838 |
if (dpl > cpl)
|
| 839 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 840 |
} else {
|
| 841 |
/* non conforming code segment */
|
| 842 |
rpl = new_cs & 3;
|
| 843 |
if (rpl > cpl)
|
| 844 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 845 |
if (dpl != cpl)
|
| 846 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 847 |
} |
| 848 |
if (!(e2 & DESC_P_MASK))
|
| 849 |
raise_exception_err(EXCP0B_NOSEG, new_cs & 0xfffc);
|
| 850 |
|
| 851 |
sp = env->regs[R_ESP]; |
| 852 |
if (!(env->segs[R_SS].flags & DESC_B_MASK))
|
| 853 |
sp &= 0xffff;
|
| 854 |
ssp = env->segs[R_SS].base + sp; |
| 855 |
if (shift) {
|
| 856 |
ssp -= 4;
|
| 857 |
stl(ssp, env->segs[R_CS].selector); |
| 858 |
ssp -= 4;
|
| 859 |
stl(ssp, next_eip); |
| 860 |
} else {
|
| 861 |
ssp -= 2;
|
| 862 |
stw(ssp, env->segs[R_CS].selector); |
| 863 |
ssp -= 2;
|
| 864 |
stw(ssp, next_eip); |
| 865 |
} |
| 866 |
sp -= (4 << shift);
|
| 867 |
|
| 868 |
load_seg_cache(&sc1, e1, e2); |
| 869 |
if (new_eip > sc1.limit)
|
| 870 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 871 |
/* from this point, not restartable */
|
| 872 |
if (!(env->segs[R_SS].flags & DESC_B_MASK))
|
| 873 |
env->regs[R_ESP] = (env->regs[R_ESP] & 0xffff0000) | (sp & 0xffff); |
| 874 |
else
|
| 875 |
env->regs[R_ESP] = sp; |
| 876 |
env->segs[R_CS].base = sc1.base; |
| 877 |
env->segs[R_CS].limit = sc1.limit; |
| 878 |
env->segs[R_CS].flags = sc1.flags; |
| 879 |
env->segs[R_CS].selector = (new_cs & 0xfffc) | cpl;
|
| 880 |
EIP = new_eip; |
| 881 |
} else {
|
| 882 |
/* check gate type */
|
| 883 |
type = (e2 >> DESC_TYPE_SHIFT) & 0x1f;
|
| 884 |
switch(type) {
|
| 885 |
case 1: /* available 286 TSS */ |
| 886 |
case 9: /* available 386 TSS */ |
| 887 |
case 5: /* task gate */ |
| 888 |
cpu_abort(env, "task gate not supported");
|
| 889 |
break;
|
| 890 |
case 4: /* 286 call gate */ |
| 891 |
case 12: /* 386 call gate */ |
| 892 |
break;
|
| 893 |
default:
|
| 894 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 895 |
break;
|
| 896 |
} |
| 897 |
shift = type >> 3;
|
| 898 |
|
| 899 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 900 |
rpl = new_cs & 3;
|
| 901 |
if (dpl < cpl || dpl < rpl)
|
| 902 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 903 |
/* check valid bit */
|
| 904 |
if (!(e2 & DESC_P_MASK))
|
| 905 |
raise_exception_err(EXCP0B_NOSEG, new_cs & 0xfffc);
|
| 906 |
selector = e1 >> 16;
|
| 907 |
offset = (e2 & 0xffff0000) | (e1 & 0x0000ffff); |
| 908 |
if ((selector & 0xfffc) == 0) |
| 909 |
raise_exception_err(EXCP0D_GPF, 0);
|
| 910 |
|
| 911 |
if (load_segment(&e1, &e2, selector) != 0) |
| 912 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 913 |
if (!(e2 & DESC_S_MASK) || !(e2 & (DESC_CS_MASK)))
|
| 914 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 915 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 916 |
if (dpl > cpl)
|
| 917 |
raise_exception_err(EXCP0D_GPF, selector & 0xfffc);
|
| 918 |
if (!(e2 & DESC_P_MASK))
|
| 919 |
raise_exception_err(EXCP0B_NOSEG, selector & 0xfffc);
|
| 920 |
|
| 921 |
if (!(e2 & DESC_C_MASK) && dpl < cpl) {
|
| 922 |
/* to inner priviledge */
|
| 923 |
get_ss_esp_from_tss(&ss, &sp, dpl); |
| 924 |
if ((ss & 0xfffc) == 0) |
| 925 |
raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
| 926 |
if ((ss & 3) != dpl) |
| 927 |
raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
| 928 |
if (load_segment(&ss_e1, &ss_e2, ss) != 0) |
| 929 |
raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
| 930 |
ss_dpl = (ss_e2 >> DESC_DPL_SHIFT) & 3;
|
| 931 |
if (ss_dpl != dpl)
|
| 932 |
raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
| 933 |
if (!(ss_e2 & DESC_S_MASK) ||
|
| 934 |
(ss_e2 & DESC_CS_MASK) || |
| 935 |
!(ss_e2 & DESC_W_MASK)) |
| 936 |
raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
| 937 |
if (!(ss_e2 & DESC_P_MASK))
|
| 938 |
raise_exception_err(EXCP0A_TSS, ss & 0xfffc);
|
| 939 |
|
| 940 |
param_count = e2 & 0x1f;
|
| 941 |
push_size = ((param_count * 2) + 8) << shift; |
| 942 |
|
| 943 |
old_esp = env->regs[R_ESP]; |
| 944 |
old_ss = env->segs[R_SS].selector; |
| 945 |
if (!(env->segs[R_SS].flags & DESC_B_MASK))
|
| 946 |
old_esp &= 0xffff;
|
| 947 |
old_ssp = env->segs[R_SS].base + old_esp; |
| 948 |
|
| 949 |
/* XXX: from this point not restartable */
|
| 950 |
load_seg(R_SS, ss, env->eip); |
| 951 |
|
| 952 |
if (!(env->segs[R_SS].flags & DESC_B_MASK))
|
| 953 |
sp &= 0xffff;
|
| 954 |
ssp = env->segs[R_SS].base + sp; |
| 955 |
if (shift) {
|
| 956 |
ssp -= 4;
|
| 957 |
stl(ssp, old_ss); |
| 958 |
ssp -= 4;
|
| 959 |
stl(ssp, old_esp); |
| 960 |
ssp -= 4 * param_count;
|
| 961 |
for(i = 0; i < param_count; i++) { |
| 962 |
val = ldl(old_ssp + i * 4);
|
| 963 |
stl(ssp + i * 4, val);
|
| 964 |
} |
| 965 |
} else {
|
| 966 |
ssp -= 2;
|
| 967 |
stw(ssp, old_ss); |
| 968 |
ssp -= 2;
|
| 969 |
stw(ssp, old_esp); |
| 970 |
ssp -= 2 * param_count;
|
| 971 |
for(i = 0; i < param_count; i++) { |
| 972 |
val = lduw(old_ssp + i * 2);
|
| 973 |
stw(ssp + i * 2, val);
|
| 974 |
} |
| 975 |
} |
| 976 |
} else {
|
| 977 |
/* to same priviledge */
|
| 978 |
if (!(env->segs[R_SS].flags & DESC_B_MASK))
|
| 979 |
sp &= 0xffff;
|
| 980 |
ssp = env->segs[R_SS].base + sp; |
| 981 |
push_size = (4 << shift);
|
| 982 |
} |
| 983 |
|
| 984 |
if (shift) {
|
| 985 |
ssp -= 4;
|
| 986 |
stl(ssp, env->segs[R_CS].selector); |
| 987 |
ssp -= 4;
|
| 988 |
stl(ssp, next_eip); |
| 989 |
} else {
|
| 990 |
ssp -= 2;
|
| 991 |
stw(ssp, env->segs[R_CS].selector); |
| 992 |
ssp -= 2;
|
| 993 |
stw(ssp, next_eip); |
| 994 |
} |
| 995 |
|
| 996 |
sp -= push_size; |
| 997 |
load_seg(R_CS, selector, env->eip); |
| 998 |
/* from this point, not restartable if same priviledge */
|
| 999 |
if (!(env->segs[R_SS].flags & DESC_B_MASK))
|
| 1000 |
env->regs[R_ESP] = (env->regs[R_ESP] & 0xffff0000) | (sp & 0xffff); |
| 1001 |
else
|
| 1002 |
env->regs[R_ESP] = sp; |
| 1003 |
EIP = offset; |
| 1004 |
} |
| 1005 |
} |
| 1006 |
|
| 1007 |
/* init the segment cache in vm86 mode */
|
| 1008 |
static inline void load_seg_vm(int seg, int selector) |
| 1009 |
{
|
| 1010 |
SegmentCache *sc = &env->segs[seg]; |
| 1011 |
selector &= 0xffff;
|
| 1012 |
sc->base = (uint8_t *)(selector << 4);
|
| 1013 |
sc->selector = selector; |
| 1014 |
sc->flags = 0;
|
| 1015 |
sc->limit = 0xffff;
|
| 1016 |
} |
| 1017 |
|
| 1018 |
/* real mode iret */
|
| 1019 |
void helper_iret_real(int shift) |
| 1020 |
{
|
| 1021 |
uint32_t sp, new_cs, new_eip, new_eflags, new_esp; |
| 1022 |
uint8_t *ssp; |
| 1023 |
int eflags_mask;
|
| 1024 |
|
| 1025 |
sp = env->regs[R_ESP] & 0xffff;
|
| 1026 |
ssp = env->segs[R_SS].base + sp; |
| 1027 |
if (shift == 1) { |
| 1028 |
/* 32 bits */
|
| 1029 |
new_eflags = ldl(ssp + 8);
|
| 1030 |
new_cs = ldl(ssp + 4) & 0xffff; |
| 1031 |
new_eip = ldl(ssp) & 0xffff;
|
| 1032 |
} else {
|
| 1033 |
/* 16 bits */
|
| 1034 |
new_eflags = lduw(ssp + 4);
|
| 1035 |
new_cs = lduw(ssp + 2);
|
| 1036 |
new_eip = lduw(ssp); |
| 1037 |
} |
| 1038 |
new_esp = sp + (6 << shift);
|
| 1039 |
env->regs[R_ESP] = (env->regs[R_ESP] & 0xffff0000) |
|
| 1040 |
(new_esp & 0xffff);
|
| 1041 |
load_seg_vm(R_CS, new_cs); |
| 1042 |
env->eip = new_eip; |
| 1043 |
eflags_mask = FL_UPDATE_CPL0_MASK; |
| 1044 |
if (shift == 0) |
| 1045 |
eflags_mask &= 0xffff;
|
| 1046 |
load_eflags(new_eflags, eflags_mask); |
| 1047 |
} |
| 1048 |
|
| 1049 |
/* protected mode iret */
|
| 1050 |
static inline void helper_ret_protected(int shift, int is_iret, int addend) |
| 1051 |
{
|
| 1052 |
uint32_t sp, new_cs, new_eip, new_eflags, new_esp, new_ss; |
| 1053 |
uint32_t new_es, new_ds, new_fs, new_gs; |
| 1054 |
uint32_t e1, e2; |
| 1055 |
int cpl, dpl, rpl, eflags_mask;
|
| 1056 |
uint8_t *ssp; |
| 1057 |
|
| 1058 |
sp = env->regs[R_ESP]; |
| 1059 |
if (!(env->segs[R_SS].flags & DESC_B_MASK))
|
| 1060 |
sp &= 0xffff;
|
| 1061 |
ssp = env->segs[R_SS].base + sp; |
| 1062 |
if (shift == 1) { |
| 1063 |
/* 32 bits */
|
| 1064 |
if (is_iret)
|
| 1065 |
new_eflags = ldl(ssp + 8);
|
| 1066 |
new_cs = ldl(ssp + 4) & 0xffff; |
| 1067 |
new_eip = ldl(ssp); |
| 1068 |
if (is_iret && (new_eflags & VM_MASK))
|
| 1069 |
goto return_to_vm86;
|
| 1070 |
} else {
|
| 1071 |
/* 16 bits */
|
| 1072 |
if (is_iret)
|
| 1073 |
new_eflags = lduw(ssp + 4);
|
| 1074 |
new_cs = lduw(ssp + 2);
|
| 1075 |
new_eip = lduw(ssp); |
| 1076 |
} |
| 1077 |
if ((new_cs & 0xfffc) == 0) |
| 1078 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1079 |
if (load_segment(&e1, &e2, new_cs) != 0) |
| 1080 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1081 |
if (!(e2 & DESC_S_MASK) ||
|
| 1082 |
!(e2 & DESC_CS_MASK)) |
| 1083 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1084 |
cpl = env->segs[R_CS].selector & 3;
|
| 1085 |
rpl = new_cs & 3;
|
| 1086 |
if (rpl < cpl)
|
| 1087 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1088 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 1089 |
if (e2 & DESC_CS_MASK) {
|
| 1090 |
if (dpl > rpl)
|
| 1091 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1092 |
} else {
|
| 1093 |
if (dpl != rpl)
|
| 1094 |
raise_exception_err(EXCP0D_GPF, new_cs & 0xfffc);
|
| 1095 |
} |
| 1096 |
if (!(e2 & DESC_P_MASK))
|
| 1097 |
raise_exception_err(EXCP0B_NOSEG, new_cs & 0xfffc);
|
| 1098 |
|
| 1099 |
if (rpl == cpl) {
|
| 1100 |
/* return to same priledge level */
|
| 1101 |
load_seg(R_CS, new_cs, env->eip); |
| 1102 |
new_esp = sp + (4 << shift) + ((2 * is_iret) << shift) + addend; |
| 1103 |
} else {
|
| 1104 |
/* return to different priviledge level */
|
| 1105 |
ssp += (4 << shift) + ((2 * is_iret) << shift) + addend; |
| 1106 |
if (shift == 1) { |
| 1107 |
/* 32 bits */
|
| 1108 |
new_esp = ldl(ssp); |
| 1109 |
new_ss = ldl(ssp + 4) & 0xffff; |
| 1110 |
} else {
|
| 1111 |
/* 16 bits */
|
| 1112 |
new_esp = lduw(ssp); |
| 1113 |
new_ss = lduw(ssp + 2);
|
| 1114 |
} |
| 1115 |
|
| 1116 |
if ((new_ss & 3) != rpl) |
| 1117 |
raise_exception_err(EXCP0D_GPF, new_ss & 0xfffc);
|
| 1118 |
if (load_segment(&e1, &e2, new_ss) != 0) |
| 1119 |
raise_exception_err(EXCP0D_GPF, new_ss & 0xfffc);
|
| 1120 |
if (!(e2 & DESC_S_MASK) ||
|
| 1121 |
(e2 & DESC_CS_MASK) || |
| 1122 |
!(e2 & DESC_W_MASK)) |
| 1123 |
raise_exception_err(EXCP0D_GPF, new_ss & 0xfffc);
|
| 1124 |
dpl = (e2 >> DESC_DPL_SHIFT) & 3;
|
| 1125 |
if (dpl != rpl)
|
| 1126 |
raise_exception_err(EXCP0D_GPF, new_ss & 0xfffc);
|
| 1127 |
if (!(e2 & DESC_P_MASK))
|
| 1128 |
raise_exception_err(EXCP0B_NOSEG, new_ss & 0xfffc);
|
| 1129 |
|
| 1130 |
load_seg(R_CS, new_cs, env->eip); |
| 1131 |
load_seg(R_SS, new_ss, env->eip); |
| 1132 |
} |
| 1133 |
if (env->segs[R_SS].flags & DESC_B_MASK)
|
| 1134 |
env->regs[R_ESP] = new_esp; |
| 1135 |
else
|
| 1136 |
env->regs[R_ESP] = (env->regs[R_ESP] & 0xffff0000) |
|
| 1137 |
(new_esp & 0xffff);
|
| 1138 |
env->eip = new_eip; |
| 1139 |
if (is_iret) {
|
| 1140 |
if (cpl == 0) |
| 1141 |
eflags_mask = FL_UPDATE_CPL0_MASK; |
| 1142 |
else
|
| 1143 |
eflags_mask = FL_UPDATE_MASK32; |
| 1144 |
if (shift == 0) |
| 1145 |
eflags_mask &= 0xffff;
|
| 1146 |
load_eflags(new_eflags, eflags_mask); |
| 1147 |
} |
| 1148 |
return;
|
| 1149 |
|
| 1150 |
return_to_vm86:
|
| 1151 |
new_esp = ldl(ssp + 12);
|
| 1152 |
new_ss = ldl(ssp + 16);
|
| 1153 |
new_es = ldl(ssp + 20);
|
| 1154 |
new_ds = ldl(ssp + 24);
|
| 1155 |
new_fs = ldl(ssp + 28);
|
| 1156 |
new_gs = ldl(ssp + 32);
|
| 1157 |
|
| 1158 |
/* modify processor state */
|
| 1159 |
load_eflags(new_eflags, FL_UPDATE_CPL0_MASK | VM_MASK | VIF_MASK | VIP_MASK); |
| 1160 |
load_seg_vm(R_CS, new_cs); |
| 1161 |
load_seg_vm(R_SS, new_ss); |
| 1162 |
load_seg_vm(R_ES, new_es); |
| 1163 |
load_seg_vm(R_DS, new_ds); |
| 1164 |
load_seg_vm(R_FS, new_fs); |
| 1165 |
load_seg_vm(R_GS, new_gs); |
| 1166 |
|
| 1167 |
env->eip = new_eip; |
| 1168 |
env->regs[R_ESP] = new_esp; |
| 1169 |
} |
| 1170 |
|
| 1171 |
void helper_iret_protected(int shift) |
| 1172 |
{
|
| 1173 |
helper_ret_protected(shift, 1, 0); |
| 1174 |
} |
| 1175 |
|
| 1176 |
void helper_lret_protected(int shift, int addend) |
| 1177 |
{
|
| 1178 |
helper_ret_protected(shift, 0, addend);
|
| 1179 |
} |
| 1180 |
|
| 1181 |
void helper_movl_crN_T0(int reg) |
| 1182 |
{
|
| 1183 |
env->cr[reg] = T0; |
| 1184 |
switch(reg) {
|
| 1185 |
case 0: |
| 1186 |
cpu_x86_update_cr0(env); |
| 1187 |
break;
|
| 1188 |
case 3: |
| 1189 |
cpu_x86_update_cr3(env); |
| 1190 |
break;
|
| 1191 |
} |
| 1192 |
} |
| 1193 |
|
| 1194 |
/* XXX: do more */
|
| 1195 |
void helper_movl_drN_T0(int reg) |
| 1196 |
{
|
| 1197 |
env->dr[reg] = T0; |
| 1198 |
} |
| 1199 |
|
| 1200 |
void helper_invlpg(unsigned int addr) |
| 1201 |
{
|
| 1202 |
cpu_x86_flush_tlb(env, addr); |
| 1203 |
} |
| 1204 |
|
| 1205 |
/* rdtsc */
|
| 1206 |
#ifndef __i386__
|
| 1207 |
uint64_t emu_time; |
| 1208 |
#endif
|
| 1209 |
|
| 1210 |
void helper_rdtsc(void) |
| 1211 |
{
|
| 1212 |
uint64_t val; |
| 1213 |
#ifdef __i386__
|
| 1214 |
asm("rdtsc" : "=A" (val)); |
| 1215 |
#else
|
| 1216 |
/* better than nothing: the time increases */
|
| 1217 |
val = emu_time++; |
| 1218 |
#endif
|
| 1219 |
EAX = val; |
| 1220 |
EDX = val >> 32;
|
| 1221 |
} |
| 1222 |
|
| 1223 |
void helper_wrmsr(void) |
| 1224 |
{
|
| 1225 |
switch(ECX) {
|
| 1226 |
case MSR_IA32_SYSENTER_CS:
|
| 1227 |
env->sysenter_cs = EAX & 0xffff;
|
| 1228 |
break;
|
| 1229 |
case MSR_IA32_SYSENTER_ESP:
|
| 1230 |
env->sysenter_esp = EAX; |
| 1231 |
break;
|
| 1232 |
case MSR_IA32_SYSENTER_EIP:
|
| 1233 |
env->sysenter_eip = EAX; |
| 1234 |
break;
|
| 1235 |
default:
|
| 1236 |
/* XXX: exception ? */
|
| 1237 |
break;
|
| 1238 |
} |
| 1239 |
} |
| 1240 |
|
| 1241 |
void helper_rdmsr(void) |
| 1242 |
{
|
| 1243 |
switch(ECX) {
|
| 1244 |
case MSR_IA32_SYSENTER_CS:
|
| 1245 |
EAX = env->sysenter_cs; |
| 1246 |
EDX = 0;
|
| 1247 |
break;
|
| 1248 |
case MSR_IA32_SYSENTER_ESP:
|
| 1249 |
EAX = env->sysenter_esp; |
| 1250 |
EDX = 0;
|
| 1251 |
break;
|
| 1252 |
case MSR_IA32_SYSENTER_EIP:
|
| 1253 |
EAX = env->sysenter_eip; |
| 1254 |
EDX = 0;
|
| 1255 |
break;
|
| 1256 |
default:
|
| 1257 |
/* XXX: exception ? */
|
| 1258 |
break;
|
| 1259 |
} |
| 1260 |
} |
| 1261 |
|
| 1262 |
void helper_lsl(void) |
| 1263 |
{
|
| 1264 |
unsigned int selector, limit; |
| 1265 |
uint32_t e1, e2; |
| 1266 |
|
| 1267 |
CC_SRC = cc_table[CC_OP].compute_all() & ~CC_Z; |
| 1268 |
selector = T0 & 0xffff;
|
| 1269 |
if (load_segment(&e1, &e2, selector) != 0) |
| 1270 |
return;
|
| 1271 |
limit = (e1 & 0xffff) | (e2 & 0x000f0000); |
| 1272 |
if (e2 & (1 << 23)) |
| 1273 |
limit = (limit << 12) | 0xfff; |
| 1274 |
T1 = limit; |
| 1275 |
CC_SRC |= CC_Z; |
| 1276 |
} |
| 1277 |
|
| 1278 |
void helper_lar(void) |
| 1279 |
{
|
| 1280 |
unsigned int selector; |
| 1281 |
uint32_t e1, e2; |
| 1282 |
|
| 1283 |
CC_SRC = cc_table[CC_OP].compute_all() & ~CC_Z; |
| 1284 |
selector = T0 & 0xffff;
|
| 1285 |
if (load_segment(&e1, &e2, selector) != 0) |
| 1286 |
return;
|
| 1287 |
T1 = e2 & 0x00f0ff00;
|
| 1288 |
CC_SRC |= CC_Z; |
| 1289 |
} |
| 1290 |
|
| 1291 |
/* FPU helpers */
|
| 1292 |
|
| 1293 |
#ifndef USE_X86LDOUBLE
|
| 1294 |
void helper_fldt_ST0_A0(void) |
| 1295 |
{
|
| 1296 |
int new_fpstt;
|
| 1297 |
new_fpstt = (env->fpstt - 1) & 7; |
| 1298 |
env->fpregs[new_fpstt] = helper_fldt((uint8_t *)A0); |
| 1299 |
env->fpstt = new_fpstt; |
| 1300 |
env->fptags[new_fpstt] = 0; /* validate stack entry */ |
| 1301 |
} |
| 1302 |
|
| 1303 |
void helper_fstt_ST0_A0(void) |
| 1304 |
{
|
| 1305 |
helper_fstt(ST0, (uint8_t *)A0); |
| 1306 |
} |
| 1307 |
#endif
|
| 1308 |
|
| 1309 |
/* BCD ops */
|
| 1310 |
|
| 1311 |
#define MUL10(iv) ( iv + iv + (iv << 3) ) |
| 1312 |
|
| 1313 |
void helper_fbld_ST0_A0(void) |
| 1314 |
{
|
| 1315 |
CPU86_LDouble tmp; |
| 1316 |
uint64_t val; |
| 1317 |
unsigned int v; |
| 1318 |
int i;
|
| 1319 |
|
| 1320 |
val = 0;
|
| 1321 |
for(i = 8; i >= 0; i--) { |
| 1322 |
v = ldub((uint8_t *)A0 + i); |
| 1323 |
val = (val * 100) + ((v >> 4) * 10) + (v & 0xf); |
| 1324 |
} |
| 1325 |
tmp = val; |
| 1326 |
if (ldub((uint8_t *)A0 + 9) & 0x80) |
| 1327 |
tmp = -tmp; |
| 1328 |
fpush(); |
| 1329 |
ST0 = tmp; |
| 1330 |
} |
| 1331 |
|
| 1332 |
void helper_fbst_ST0_A0(void) |
| 1333 |
{
|
| 1334 |
CPU86_LDouble tmp; |
| 1335 |
int v;
|
| 1336 |
uint8_t *mem_ref, *mem_end; |
| 1337 |
int64_t val; |
| 1338 |
|
| 1339 |
tmp = rint(ST0); |
| 1340 |
val = (int64_t)tmp; |
| 1341 |
mem_ref = (uint8_t *)A0; |
| 1342 |
mem_end = mem_ref + 9;
|
| 1343 |
if (val < 0) { |
| 1344 |
stb(mem_end, 0x80);
|
| 1345 |
val = -val; |
| 1346 |
} else {
|
| 1347 |
stb(mem_end, 0x00);
|
| 1348 |
} |
| 1349 |
while (mem_ref < mem_end) {
|
| 1350 |
if (val == 0) |
| 1351 |
break;
|
| 1352 |
v = val % 100;
|
| 1353 |
val = val / 100;
|
| 1354 |
v = ((v / 10) << 4) | (v % 10); |
| 1355 |
stb(mem_ref++, v); |
| 1356 |
} |
| 1357 |
while (mem_ref < mem_end) {
|
| 1358 |
stb(mem_ref++, 0);
|
| 1359 |
} |
| 1360 |
} |
| 1361 |
|
| 1362 |
void helper_f2xm1(void) |
| 1363 |
{
|
| 1364 |
ST0 = pow(2.0,ST0) - 1.0; |
| 1365 |
} |
| 1366 |
|
| 1367 |
void helper_fyl2x(void) |
| 1368 |
{
|
| 1369 |
CPU86_LDouble fptemp; |
| 1370 |
|
| 1371 |
fptemp = ST0; |
| 1372 |
if (fptemp>0.0){ |
| 1373 |
fptemp = log(fptemp)/log(2.0); /* log2(ST) */ |
| 1374 |
ST1 *= fptemp; |
| 1375 |
fpop(); |
| 1376 |
} else {
|
| 1377 |
env->fpus &= (~0x4700);
|
| 1378 |
env->fpus |= 0x400;
|
| 1379 |
} |
| 1380 |
} |
| 1381 |
|
| 1382 |
void helper_fptan(void) |
| 1383 |
{
|
| 1384 |
CPU86_LDouble fptemp; |
| 1385 |
|
| 1386 |
fptemp = ST0; |
| 1387 |
if((fptemp > MAXTAN)||(fptemp < -MAXTAN)) {
|
| 1388 |
env->fpus |= 0x400;
|
| 1389 |
} else {
|
| 1390 |
ST0 = tan(fptemp); |
| 1391 |
fpush(); |
| 1392 |
ST0 = 1.0; |
| 1393 |
env->fpus &= (~0x400); /* C2 <-- 0 */ |
| 1394 |
/* the above code is for |arg| < 2**52 only */
|
| 1395 |
} |
| 1396 |
} |
| 1397 |
|
| 1398 |
void helper_fpatan(void) |
| 1399 |
{
|
| 1400 |
CPU86_LDouble fptemp, fpsrcop; |
| 1401 |
|
| 1402 |
fpsrcop = ST1; |
| 1403 |
fptemp = ST0; |
| 1404 |
ST1 = atan2(fpsrcop,fptemp); |
| 1405 |
fpop(); |
| 1406 |
} |
| 1407 |
|
| 1408 |
void helper_fxtract(void) |
| 1409 |
{
|
| 1410 |
CPU86_LDoubleU temp; |
| 1411 |
unsigned int expdif; |
| 1412 |
|
| 1413 |
temp.d = ST0; |
| 1414 |
expdif = EXPD(temp) - EXPBIAS; |
| 1415 |
/*DP exponent bias*/
|
| 1416 |
ST0 = expdif; |
| 1417 |
fpush(); |
| 1418 |
BIASEXPONENT(temp); |
| 1419 |
ST0 = temp.d; |
| 1420 |
} |
| 1421 |
|
| 1422 |
void helper_fprem1(void) |
| 1423 |
{
|
| 1424 |
CPU86_LDouble dblq, fpsrcop, fptemp; |
| 1425 |
CPU86_LDoubleU fpsrcop1, fptemp1; |
| 1426 |
int expdif;
|
| 1427 |
int q;
|
| 1428 |
|
| 1429 |
fpsrcop = ST0; |
| 1430 |
fptemp = ST1; |
| 1431 |
fpsrcop1.d = fpsrcop; |
| 1432 |
fptemp1.d = fptemp; |
| 1433 |
expdif = EXPD(fpsrcop1) - EXPD(fptemp1); |
| 1434 |
if (expdif < 53) { |
| 1435 |
dblq = fpsrcop / fptemp; |
| 1436 |
dblq = (dblq < 0.0)? ceil(dblq): floor(dblq); |
| 1437 |
ST0 = fpsrcop - fptemp*dblq; |
| 1438 |
q = (int)dblq; /* cutting off top bits is assumed here */ |
| 1439 |
env->fpus &= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */ |
| 1440 |
/* (C0,C1,C3) <-- (q2,q1,q0) */
|
| 1441 |
env->fpus |= (q&0x4) << 6; /* (C0) <-- q2 */ |
| 1442 |
env->fpus |= (q&0x2) << 8; /* (C1) <-- q1 */ |
| 1443 |
env->fpus |= (q&0x1) << 14; /* (C3) <-- q0 */ |
| 1444 |
} else {
|
| 1445 |
env->fpus |= 0x400; /* C2 <-- 1 */ |
| 1446 |
fptemp = pow(2.0, expdif-50); |
| 1447 |
fpsrcop = (ST0 / ST1) / fptemp; |
| 1448 |
/* fpsrcop = integer obtained by rounding to the nearest */
|
| 1449 |
fpsrcop = (fpsrcop-floor(fpsrcop) < ceil(fpsrcop)-fpsrcop)? |
| 1450 |
floor(fpsrcop): ceil(fpsrcop); |
| 1451 |
ST0 -= (ST1 * fpsrcop * fptemp); |
| 1452 |
} |
| 1453 |
} |
| 1454 |
|
| 1455 |
void helper_fprem(void) |
| 1456 |
{
|
| 1457 |
CPU86_LDouble dblq, fpsrcop, fptemp; |
| 1458 |
CPU86_LDoubleU fpsrcop1, fptemp1; |
| 1459 |
int expdif;
|
| 1460 |
int q;
|
| 1461 |
|
| 1462 |
fpsrcop = ST0; |
| 1463 |
fptemp = ST1; |
| 1464 |
fpsrcop1.d = fpsrcop; |
| 1465 |
fptemp1.d = fptemp; |
| 1466 |
expdif = EXPD(fpsrcop1) - EXPD(fptemp1); |
| 1467 |
if ( expdif < 53 ) { |
| 1468 |
dblq = fpsrcop / fptemp; |
| 1469 |
dblq = (dblq < 0.0)? ceil(dblq): floor(dblq); |
| 1470 |
ST0 = fpsrcop - fptemp*dblq; |
| 1471 |
q = (int)dblq; /* cutting off top bits is assumed here */ |
| 1472 |
env->fpus &= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */ |
| 1473 |
/* (C0,C1,C3) <-- (q2,q1,q0) */
|
| 1474 |
env->fpus |= (q&0x4) << 6; /* (C0) <-- q2 */ |
| 1475 |
env->fpus |= (q&0x2) << 8; /* (C1) <-- q1 */ |
| 1476 |
env->fpus |= (q&0x1) << 14; /* (C3) <-- q0 */ |
| 1477 |
} else {
|
| 1478 |
env->fpus |= 0x400; /* C2 <-- 1 */ |
| 1479 |
fptemp = pow(2.0, expdif-50); |
| 1480 |
fpsrcop = (ST0 / ST1) / fptemp; |
| 1481 |
/* fpsrcop = integer obtained by chopping */
|
| 1482 |
fpsrcop = (fpsrcop < 0.0)? |
| 1483 |
-(floor(fabs(fpsrcop))): floor(fpsrcop); |
| 1484 |
ST0 -= (ST1 * fpsrcop * fptemp); |
| 1485 |
} |
| 1486 |
} |
| 1487 |
|
| 1488 |
void helper_fyl2xp1(void) |
| 1489 |
{
|
| 1490 |
CPU86_LDouble fptemp; |
| 1491 |
|
| 1492 |
fptemp = ST0; |
| 1493 |
if ((fptemp+1.0)>0.0) { |
| 1494 |
fptemp = log(fptemp+1.0) / log(2.0); /* log2(ST+1.0) */ |
| 1495 |
ST1 *= fptemp; |
| 1496 |
fpop(); |
| 1497 |
} else {
|
| 1498 |
env->fpus &= (~0x4700);
|
| 1499 |
env->fpus |= 0x400;
|
| 1500 |
} |
| 1501 |
} |
| 1502 |
|
| 1503 |
void helper_fsqrt(void) |
| 1504 |
{
|
| 1505 |
CPU86_LDouble fptemp; |
| 1506 |
|
| 1507 |
fptemp = ST0; |
| 1508 |
if (fptemp<0.0) { |
| 1509 |
env->fpus &= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */ |
| 1510 |
env->fpus |= 0x400;
|
| 1511 |
} |
| 1512 |
ST0 = sqrt(fptemp); |
| 1513 |
} |
| 1514 |
|
| 1515 |
void helper_fsincos(void) |
| 1516 |
{
|
| 1517 |
CPU86_LDouble fptemp; |
| 1518 |
|
| 1519 |
fptemp = ST0; |
| 1520 |
if ((fptemp > MAXTAN)||(fptemp < -MAXTAN)) {
|
| 1521 |
env->fpus |= 0x400;
|
| 1522 |
} else {
|
| 1523 |
ST0 = sin(fptemp); |
| 1524 |
fpush(); |
| 1525 |
ST0 = cos(fptemp); |
| 1526 |
env->fpus &= (~0x400); /* C2 <-- 0 */ |
| 1527 |
/* the above code is for |arg| < 2**63 only */
|
| 1528 |
} |
| 1529 |
} |
| 1530 |
|
| 1531 |
void helper_frndint(void) |
| 1532 |
{
|
| 1533 |
CPU86_LDouble a; |
| 1534 |
|
| 1535 |
a = ST0; |
| 1536 |
#ifdef __arm__
|
| 1537 |
switch(env->fpuc & RC_MASK) {
|
| 1538 |
default:
|
| 1539 |
case RC_NEAR:
|
| 1540 |
asm("rndd %0, %1" : "=f" (a) : "f"(a)); |
| 1541 |
break;
|
| 1542 |
case RC_DOWN:
|
| 1543 |
asm("rnddm %0, %1" : "=f" (a) : "f"(a)); |
| 1544 |
break;
|
| 1545 |
case RC_UP:
|
| 1546 |
asm("rnddp %0, %1" : "=f" (a) : "f"(a)); |
| 1547 |
break;
|
| 1548 |
case RC_CHOP:
|
| 1549 |
asm("rnddz %0, %1" : "=f" (a) : "f"(a)); |
| 1550 |
break;
|
| 1551 |
} |
| 1552 |
#else
|
| 1553 |
a = rint(a); |
| 1554 |
#endif
|
| 1555 |
ST0 = a; |
| 1556 |
} |
| 1557 |
|
| 1558 |
void helper_fscale(void) |
| 1559 |
{
|
| 1560 |
CPU86_LDouble fpsrcop, fptemp; |
| 1561 |
|
| 1562 |
fpsrcop = 2.0; |
| 1563 |
fptemp = pow(fpsrcop,ST1); |
| 1564 |
ST0 *= fptemp; |
| 1565 |
} |
| 1566 |
|
| 1567 |
void helper_fsin(void) |
| 1568 |
{
|
| 1569 |
CPU86_LDouble fptemp; |
| 1570 |
|
| 1571 |
fptemp = ST0; |
| 1572 |
if ((fptemp > MAXTAN)||(fptemp < -MAXTAN)) {
|
| 1573 |
env->fpus |= 0x400;
|
| 1574 |
} else {
|
| 1575 |
ST0 = sin(fptemp); |
| 1576 |
env->fpus &= (~0x400); /* C2 <-- 0 */ |
| 1577 |
/* the above code is for |arg| < 2**53 only */
|
| 1578 |
} |
| 1579 |
} |
| 1580 |
|
| 1581 |
void helper_fcos(void) |
| 1582 |
{
|
| 1583 |
CPU86_LDouble fptemp; |
| 1584 |
|
| 1585 |
fptemp = ST0; |
| 1586 |
if((fptemp > MAXTAN)||(fptemp < -MAXTAN)) {
|
| 1587 |
env->fpus |= 0x400;
|
| 1588 |
} else {
|
| 1589 |
ST0 = cos(fptemp); |
| 1590 |
env->fpus &= (~0x400); /* C2 <-- 0 */ |
| 1591 |
/* the above code is for |arg5 < 2**63 only */
|
| 1592 |
} |
| 1593 |
} |
| 1594 |
|
| 1595 |
void helper_fxam_ST0(void) |
| 1596 |
{
|
| 1597 |
CPU86_LDoubleU temp; |
| 1598 |
int expdif;
|
| 1599 |
|
| 1600 |
temp.d = ST0; |
| 1601 |
|
| 1602 |
env->fpus &= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */ |
| 1603 |
if (SIGND(temp))
|
| 1604 |
env->fpus |= 0x200; /* C1 <-- 1 */ |
| 1605 |
|
| 1606 |
expdif = EXPD(temp); |
| 1607 |
if (expdif == MAXEXPD) {
|
| 1608 |
if (MANTD(temp) == 0) |
| 1609 |
env->fpus |= 0x500 /*Infinity*/; |
| 1610 |
else
|
| 1611 |
env->fpus |= 0x100 /*NaN*/; |
| 1612 |
} else if (expdif == 0) { |
| 1613 |
if (MANTD(temp) == 0) |
| 1614 |
env->fpus |= 0x4000 /*Zero*/; |
| 1615 |
else
|
| 1616 |
env->fpus |= 0x4400 /*Denormal*/; |
| 1617 |
} else {
|
| 1618 |
env->fpus |= 0x400;
|
| 1619 |
} |
| 1620 |
} |
| 1621 |
|
| 1622 |
void helper_fstenv(uint8_t *ptr, int data32) |
| 1623 |
{
|
| 1624 |
int fpus, fptag, exp, i;
|
| 1625 |
uint64_t mant; |
| 1626 |
CPU86_LDoubleU tmp; |
| 1627 |
|
| 1628 |
fpus = (env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11; |
| 1629 |
fptag = 0;
|
| 1630 |
for (i=7; i>=0; i--) { |
| 1631 |
fptag <<= 2;
|
| 1632 |
if (env->fptags[i]) {
|
| 1633 |
fptag |= 3;
|
| 1634 |
} else {
|
| 1635 |
tmp.d = env->fpregs[i]; |
| 1636 |
exp = EXPD(tmp); |
| 1637 |
mant = MANTD(tmp); |
| 1638 |
if (exp == 0 && mant == 0) { |
| 1639 |
/* zero */
|
| 1640 |
fptag |= 1;
|
| 1641 |
} else if (exp == 0 || exp == MAXEXPD |
| 1642 |
#ifdef USE_X86LDOUBLE
|
| 1643 |
|| (mant & (1LL << 63)) == 0 |
| 1644 |
#endif
|
| 1645 |
) {
|
| 1646 |
/* NaNs, infinity, denormal */
|
| 1647 |
fptag |= 2;
|
| 1648 |
} |
| 1649 |
} |
| 1650 |
} |
| 1651 |
if (data32) {
|
| 1652 |
/* 32 bit */
|
| 1653 |
stl(ptr, env->fpuc); |
| 1654 |
stl(ptr + 4, fpus);
|
| 1655 |
stl(ptr + 8, fptag);
|
| 1656 |
stl(ptr + 12, 0); |
| 1657 |
stl(ptr + 16, 0); |
| 1658 |
stl(ptr + 20, 0); |
| 1659 |
stl(ptr + 24, 0); |
| 1660 |
} else {
|
| 1661 |
/* 16 bit */
|
| 1662 |
stw(ptr, env->fpuc); |
| 1663 |
stw(ptr + 2, fpus);
|
| 1664 |
stw(ptr + 4, fptag);
|
| 1665 |
stw(ptr + 6, 0); |
| 1666 |
stw(ptr + 8, 0); |
| 1667 |
stw(ptr + 10, 0); |
| 1668 |
stw(ptr + 12, 0); |
| 1669 |
} |
| 1670 |
} |
| 1671 |
|
| 1672 |
void helper_fldenv(uint8_t *ptr, int data32) |
| 1673 |
{
|
| 1674 |
int i, fpus, fptag;
|
| 1675 |
|
| 1676 |
if (data32) {
|
| 1677 |
env->fpuc = lduw(ptr); |
| 1678 |
fpus = lduw(ptr + 4);
|
| 1679 |
fptag = lduw(ptr + 8);
|
| 1680 |
} |
| 1681 |
else {
|
| 1682 |
env->fpuc = lduw(ptr); |
| 1683 |
fpus = lduw(ptr + 2);
|
| 1684 |
fptag = lduw(ptr + 4);
|
| 1685 |
} |
| 1686 |
env->fpstt = (fpus >> 11) & 7; |
| 1687 |
env->fpus = fpus & ~0x3800;
|
| 1688 |
for(i = 0;i < 7; i++) { |
| 1689 |
env->fptags[i] = ((fptag & 3) == 3); |
| 1690 |
fptag >>= 2;
|
| 1691 |
} |
| 1692 |
} |
| 1693 |
|
| 1694 |
void helper_fsave(uint8_t *ptr, int data32) |
| 1695 |
{
|
| 1696 |
CPU86_LDouble tmp; |
| 1697 |
int i;
|
| 1698 |
|
| 1699 |
helper_fstenv(ptr, data32); |
| 1700 |
|
| 1701 |
ptr += (14 << data32);
|
| 1702 |
for(i = 0;i < 8; i++) { |
| 1703 |
tmp = ST(i); |
| 1704 |
#ifdef USE_X86LDOUBLE
|
| 1705 |
*(long double *)ptr = tmp; |
| 1706 |
#else
|
| 1707 |
helper_fstt(tmp, ptr); |
| 1708 |
#endif
|
| 1709 |
ptr += 10;
|
| 1710 |
} |
| 1711 |
|
| 1712 |
/* fninit */
|
| 1713 |
env->fpus = 0;
|
| 1714 |
env->fpstt = 0;
|
| 1715 |
env->fpuc = 0x37f;
|
| 1716 |
env->fptags[0] = 1; |
| 1717 |
env->fptags[1] = 1; |
| 1718 |
env->fptags[2] = 1; |
| 1719 |
env->fptags[3] = 1; |
| 1720 |
env->fptags[4] = 1; |
| 1721 |
env->fptags[5] = 1; |
| 1722 |
env->fptags[6] = 1; |
| 1723 |
env->fptags[7] = 1; |
| 1724 |
} |
| 1725 |
|
| 1726 |
void helper_frstor(uint8_t *ptr, int data32) |
| 1727 |
{
|
| 1728 |
CPU86_LDouble tmp; |
| 1729 |
int i;
|
| 1730 |
|
| 1731 |
helper_fldenv(ptr, data32); |
| 1732 |
ptr += (14 << data32);
|
| 1733 |
|
| 1734 |
for(i = 0;i < 8; i++) { |
| 1735 |
#ifdef USE_X86LDOUBLE
|
| 1736 |
tmp = *(long double *)ptr; |
| 1737 |
#else
|
| 1738 |
tmp = helper_fldt(ptr); |
| 1739 |
#endif
|
| 1740 |
ST(i) = tmp; |
| 1741 |
ptr += 10;
|
| 1742 |
} |
| 1743 |
} |
| 1744 |
|