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/*
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* i386 emulator main execution loop
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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 "config.h" |
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#include "exec.h" |
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#include "disas.h" |
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#if !defined(CONFIG_SOFTMMU)
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#undef EAX
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#undef ECX
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#undef EDX
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#undef EBX
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#undef ESP
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#undef EBP
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#undef ESI
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#undef EDI
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#undef EIP
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#include <signal.h> |
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#include <sys/ucontext.h> |
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#endif
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int tb_invalidated_flag;
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//#define DEBUG_EXEC
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//#define DEBUG_SIGNAL
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#if defined(TARGET_ARM) || defined(TARGET_SPARC)
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/* XXX: unify with i386 target */
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void cpu_loop_exit(void) |
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{
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longjmp(env->jmp_env, 1);
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} |
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#endif
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/* exit the current TB from a signal handler. The host registers are
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restored in a state compatible with the CPU emulator
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*/
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void cpu_resume_from_signal(CPUState *env1, void *puc) |
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{
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#if !defined(CONFIG_SOFTMMU)
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struct ucontext *uc = puc;
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#endif
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env = env1; |
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|
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/* XXX: restore cpu registers saved in host registers */
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#if !defined(CONFIG_SOFTMMU)
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if (puc) {
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/* XXX: use siglongjmp ? */
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sigprocmask(SIG_SETMASK, &uc->uc_sigmask, NULL);
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} |
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#endif
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longjmp(env->jmp_env, 1);
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} |
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/* main execution loop */
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int cpu_exec(CPUState *env1)
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{
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int saved_T0, saved_T1, saved_T2;
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CPUState *saved_env; |
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#ifdef reg_EAX
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int saved_EAX;
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#endif
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#ifdef reg_ECX
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int saved_ECX;
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#endif
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#ifdef reg_EDX
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int saved_EDX;
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#endif
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#ifdef reg_EBX
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int saved_EBX;
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#endif
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#ifdef reg_ESP
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int saved_ESP;
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#endif
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#ifdef reg_EBP
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int saved_EBP;
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#endif
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#ifdef reg_ESI
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int saved_ESI;
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#endif
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#ifdef reg_EDI
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int saved_EDI;
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#endif
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#ifdef __sparc__
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int saved_i7, tmp_T0;
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#endif
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int code_gen_size, ret, interrupt_request;
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void (*gen_func)(void); |
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TranslationBlock *tb, **ptb; |
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uint8_t *tc_ptr, *cs_base, *pc; |
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unsigned int flags; |
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|
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/* first we save global registers */
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saved_T0 = T0; |
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saved_T1 = T1; |
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saved_T2 = T2; |
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saved_env = env; |
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env = env1; |
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#ifdef __sparc__
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/* we also save i7 because longjmp may not restore it */
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asm volatile ("mov %%i7, %0" : "=r" (saved_i7)); |
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#endif
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#if defined(TARGET_I386)
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#ifdef reg_EAX
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saved_EAX = EAX; |
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#endif
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#ifdef reg_ECX
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saved_ECX = ECX; |
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#endif
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#ifdef reg_EDX
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saved_EDX = EDX; |
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#endif
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#ifdef reg_EBX
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saved_EBX = EBX; |
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#endif
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#ifdef reg_ESP
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saved_ESP = ESP; |
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#endif
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#ifdef reg_EBP
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saved_EBP = EBP; |
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#endif
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#ifdef reg_ESI
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saved_ESI = ESI; |
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#endif
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#ifdef reg_EDI
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saved_EDI = EDI; |
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#endif
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env_to_regs(); |
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/* put eflags in CPU temporary format */
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CC_SRC = env->eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C); |
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DF = 1 - (2 * ((env->eflags >> 10) & 1)); |
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CC_OP = CC_OP_EFLAGS; |
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env->eflags &= ~(DF_MASK | CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C); |
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#elif defined(TARGET_ARM)
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{
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unsigned int psr; |
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psr = env->cpsr; |
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env->CF = (psr >> 29) & 1; |
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env->NZF = (psr & 0xc0000000) ^ 0x40000000; |
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env->VF = (psr << 3) & 0x80000000; |
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env->cpsr = psr & ~0xf0000000;
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} |
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#elif defined(TARGET_SPARC)
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#elif defined(TARGET_PPC)
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#else
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#error unsupported target CPU
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#endif
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env->exception_index = -1;
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/* prepare setjmp context for exception handling */
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for(;;) {
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if (setjmp(env->jmp_env) == 0) { |
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env->current_tb = NULL;
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/* if an exception is pending, we execute it here */
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if (env->exception_index >= 0) { |
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if (env->exception_index >= EXCP_INTERRUPT) {
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/* exit request from the cpu execution loop */
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ret = env->exception_index; |
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break;
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} else if (env->user_mode_only) { |
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/* if user mode only, we simulate a fake exception
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which will be hanlded outside the cpu execution
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loop */
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#if defined(TARGET_I386)
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do_interrupt_user(env->exception_index, |
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env->exception_is_int, |
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env->error_code, |
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env->exception_next_eip); |
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#endif
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ret = env->exception_index; |
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break;
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} else {
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#if defined(TARGET_I386)
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/* simulate a real cpu exception. On i386, it can
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trigger new exceptions, but we do not handle
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double or triple faults yet. */
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do_interrupt(env->exception_index, |
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env->exception_is_int, |
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env->error_code, |
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env->exception_next_eip, 0);
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#elif defined(TARGET_PPC)
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do_interrupt(env); |
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#elif defined(TARGET_SPARC)
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do_interrupt(env->exception_index, |
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0,
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env->error_code, |
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env->exception_next_pc, 0);
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#endif
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} |
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env->exception_index = -1;
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} |
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T0 = 0; /* force lookup of first TB */ |
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for(;;) {
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#ifdef __sparc__
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/* g1 can be modified by some libc? functions */
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tmp_T0 = T0; |
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#endif
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interrupt_request = env->interrupt_request; |
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if (__builtin_expect(interrupt_request, 0)) { |
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#if defined(TARGET_I386)
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/* if hardware interrupt pending, we execute it */
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if ((interrupt_request & CPU_INTERRUPT_HARD) &&
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(env->eflags & IF_MASK) && |
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!(env->hflags & HF_INHIBIT_IRQ_MASK)) {
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int intno;
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env->interrupt_request &= ~CPU_INTERRUPT_HARD; |
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intno = cpu_get_pic_interrupt(env); |
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if (loglevel & CPU_LOG_TB_IN_ASM) {
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fprintf(logfile, "Servicing hardware INT=0x%02x\n", intno);
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} |
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do_interrupt(intno, 0, 0, 0, 1); |
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/* ensure that no TB jump will be modified as
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the program flow was changed */
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#ifdef __sparc__
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tmp_T0 = 0;
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#else
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T0 = 0;
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#endif
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} |
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#elif defined(TARGET_PPC)
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#if 0
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if ((interrupt_request & CPU_INTERRUPT_RESET)) {
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cpu_ppc_reset(env);
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}
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#endif
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if (msr_ee != 0) { |
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if ((interrupt_request & CPU_INTERRUPT_HARD)) {
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/* Raise it */
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env->exception_index = EXCP_EXTERNAL; |
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env->error_code = 0;
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do_interrupt(env); |
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env->interrupt_request &= ~CPU_INTERRUPT_HARD; |
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} else if ((interrupt_request & CPU_INTERRUPT_TIMER)) { |
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/* Raise it */
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env->exception_index = EXCP_DECR; |
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env->error_code = 0;
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do_interrupt(env); |
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env->interrupt_request &= ~CPU_INTERRUPT_TIMER; |
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} |
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} |
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#elif defined(TARGET_SPARC)
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if (interrupt_request & CPU_INTERRUPT_HARD) {
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do_interrupt(env->interrupt_index, 0, 0, 0, 0); |
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env->interrupt_request &= ~CPU_INTERRUPT_HARD; |
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} else if (interrupt_request & CPU_INTERRUPT_TIMER) { |
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//do_interrupt(0, 0, 0, 0, 0);
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env->interrupt_request &= ~CPU_INTERRUPT_TIMER; |
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} |
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#endif
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if (interrupt_request & CPU_INTERRUPT_EXITTB) {
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env->interrupt_request &= ~CPU_INTERRUPT_EXITTB; |
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/* ensure that no TB jump will be modified as
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the program flow was changed */
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#ifdef __sparc__
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tmp_T0 = 0;
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#else
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T0 = 0;
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#endif
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} |
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if (interrupt_request & CPU_INTERRUPT_EXIT) {
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env->interrupt_request &= ~CPU_INTERRUPT_EXIT; |
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env->exception_index = EXCP_INTERRUPT; |
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cpu_loop_exit(); |
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} |
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} |
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#ifdef DEBUG_EXEC
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if (loglevel & CPU_LOG_EXEC) {
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#if defined(TARGET_I386)
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/* restore flags in standard format */
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env->regs[R_EAX] = EAX; |
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env->regs[R_EBX] = EBX; |
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env->regs[R_ECX] = ECX; |
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env->regs[R_EDX] = EDX; |
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env->regs[R_ESI] = ESI; |
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env->regs[R_EDI] = EDI; |
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env->regs[R_EBP] = EBP; |
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env->regs[R_ESP] = ESP; |
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env->eflags = env->eflags | cc_table[CC_OP].compute_all() | (DF & DF_MASK); |
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cpu_dump_state(env, logfile, fprintf, X86_DUMP_CCOP); |
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env->eflags &= ~(DF_MASK | CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C); |
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#elif defined(TARGET_ARM)
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env->cpsr = compute_cpsr(); |
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cpu_dump_state(env, logfile, fprintf, 0);
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env->cpsr &= ~0xf0000000;
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#elif defined(TARGET_SPARC)
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cpu_dump_state (env, logfile, fprintf, 0);
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#elif defined(TARGET_PPC)
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cpu_dump_state(env, logfile, fprintf, 0);
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#else
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#error unsupported target CPU
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#endif
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} |
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#endif
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/* we record a subset of the CPU state. It will
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always be the same before a given translated block
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is executed. */
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#if defined(TARGET_I386)
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flags = env->hflags; |
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flags |= (env->eflags & (IOPL_MASK | TF_MASK | VM_MASK)); |
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cs_base = env->segs[R_CS].base; |
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pc = cs_base + env->eip; |
| 323 |
#elif defined(TARGET_ARM)
|
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flags = 0;
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cs_base = 0;
|
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pc = (uint8_t *)env->regs[15];
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#elif defined(TARGET_SPARC)
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flags = 0;
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cs_base = (uint8_t *)env->npc; |
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pc = (uint8_t *) env->pc; |
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#elif defined(TARGET_PPC)
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flags = 0;
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cs_base = 0;
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pc = (uint8_t *)env->nip; |
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#else
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#error unsupported CPU
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#endif
|
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tb = tb_find(&ptb, (unsigned long)pc, (unsigned long)cs_base, |
| 339 |
flags); |
| 340 |
if (!tb) {
|
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TranslationBlock **ptb1; |
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unsigned int h; |
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target_ulong phys_pc, phys_page1, phys_page2, virt_page2; |
| 344 |
|
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|
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spin_lock(&tb_lock); |
| 347 |
|
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tb_invalidated_flag = 0;
|
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|
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regs_to_env(); /* XXX: do it just before cpu_gen_code() */
|
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|
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/* find translated block using physical mappings */
|
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phys_pc = get_phys_addr_code(env, (unsigned long)pc); |
| 354 |
phys_page1 = phys_pc & TARGET_PAGE_MASK; |
| 355 |
phys_page2 = -1;
|
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h = tb_phys_hash_func(phys_pc); |
| 357 |
ptb1 = &tb_phys_hash[h]; |
| 358 |
for(;;) {
|
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tb = *ptb1; |
| 360 |
if (!tb)
|
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goto not_found;
|
| 362 |
if (tb->pc == (unsigned long)pc && |
| 363 |
tb->page_addr[0] == phys_page1 &&
|
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tb->cs_base == (unsigned long)cs_base && |
| 365 |
tb->flags == flags) {
|
| 366 |
/* check next page if needed */
|
| 367 |
if (tb->page_addr[1] != -1) { |
| 368 |
virt_page2 = ((unsigned long)pc & TARGET_PAGE_MASK) + |
| 369 |
TARGET_PAGE_SIZE; |
| 370 |
phys_page2 = get_phys_addr_code(env, virt_page2); |
| 371 |
if (tb->page_addr[1] == phys_page2) |
| 372 |
goto found;
|
| 373 |
} else {
|
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goto found;
|
| 375 |
} |
| 376 |
} |
| 377 |
ptb1 = &tb->phys_hash_next; |
| 378 |
} |
| 379 |
not_found:
|
| 380 |
/* if no translated code available, then translate it now */
|
| 381 |
tb = tb_alloc((unsigned long)pc); |
| 382 |
if (!tb) {
|
| 383 |
/* flush must be done */
|
| 384 |
tb_flush(env); |
| 385 |
/* cannot fail at this point */
|
| 386 |
tb = tb_alloc((unsigned long)pc); |
| 387 |
/* don't forget to invalidate previous TB info */
|
| 388 |
ptb = &tb_hash[tb_hash_func((unsigned long)pc)]; |
| 389 |
T0 = 0;
|
| 390 |
} |
| 391 |
tc_ptr = code_gen_ptr; |
| 392 |
tb->tc_ptr = tc_ptr; |
| 393 |
tb->cs_base = (unsigned long)cs_base; |
| 394 |
tb->flags = flags; |
| 395 |
cpu_gen_code(env, tb, CODE_GEN_MAX_SIZE, &code_gen_size); |
| 396 |
code_gen_ptr = (void *)(((unsigned long)code_gen_ptr + code_gen_size + CODE_GEN_ALIGN - 1) & ~(CODE_GEN_ALIGN - 1)); |
| 397 |
|
| 398 |
/* check next page if needed */
|
| 399 |
virt_page2 = ((unsigned long)pc + tb->size - 1) & TARGET_PAGE_MASK; |
| 400 |
phys_page2 = -1;
|
| 401 |
if (((unsigned long)pc & TARGET_PAGE_MASK) != virt_page2) { |
| 402 |
phys_page2 = get_phys_addr_code(env, virt_page2); |
| 403 |
} |
| 404 |
tb_link_phys(tb, phys_pc, phys_page2); |
| 405 |
|
| 406 |
found:
|
| 407 |
if (tb_invalidated_flag) {
|
| 408 |
/* as some TB could have been invalidated because
|
| 409 |
of memory exceptions while generating the code, we
|
| 410 |
must recompute the hash index here */
|
| 411 |
ptb = &tb_hash[tb_hash_func((unsigned long)pc)]; |
| 412 |
while (*ptb != NULL) |
| 413 |
ptb = &(*ptb)->hash_next; |
| 414 |
T0 = 0;
|
| 415 |
} |
| 416 |
/* we add the TB in the virtual pc hash table */
|
| 417 |
*ptb = tb; |
| 418 |
tb->hash_next = NULL;
|
| 419 |
tb_link(tb); |
| 420 |
spin_unlock(&tb_lock); |
| 421 |
} |
| 422 |
#ifdef DEBUG_EXEC
|
| 423 |
if (loglevel & CPU_LOG_EXEC) {
|
| 424 |
fprintf(logfile, "Trace 0x%08lx [0x%08lx] %s\n",
|
| 425 |
(long)tb->tc_ptr, (long)tb->pc, |
| 426 |
lookup_symbol((void *)tb->pc));
|
| 427 |
} |
| 428 |
#endif
|
| 429 |
#ifdef __sparc__
|
| 430 |
T0 = tmp_T0; |
| 431 |
#endif
|
| 432 |
/* see if we can patch the calling TB. */
|
| 433 |
if (T0 != 0 |
| 434 |
#if defined(TARGET_I386) && defined(USE_CODE_COPY)
|
| 435 |
&& (tb->cflags & CF_CODE_COPY) == |
| 436 |
(((TranslationBlock *)(T0 & ~3))->cflags & CF_CODE_COPY)
|
| 437 |
#endif
|
| 438 |
) {
|
| 439 |
spin_lock(&tb_lock); |
| 440 |
tb_add_jump((TranslationBlock *)(T0 & ~3), T0 & 3, tb); |
| 441 |
#if defined(USE_CODE_COPY)
|
| 442 |
/* propagates the FP use info */
|
| 443 |
((TranslationBlock *)(T0 & ~3))->cflags |=
|
| 444 |
(tb->cflags & CF_FP_USED); |
| 445 |
#endif
|
| 446 |
spin_unlock(&tb_lock); |
| 447 |
} |
| 448 |
tc_ptr = tb->tc_ptr; |
| 449 |
env->current_tb = tb; |
| 450 |
/* execute the generated code */
|
| 451 |
gen_func = (void *)tc_ptr;
|
| 452 |
#if defined(__sparc__)
|
| 453 |
__asm__ __volatile__("call %0\n\t"
|
| 454 |
"mov %%o7,%%i0"
|
| 455 |
: /* no outputs */
|
| 456 |
: "r" (gen_func)
|
| 457 |
: "i0", "i1", "i2", "i3", "i4", "i5"); |
| 458 |
#elif defined(__arm__)
|
| 459 |
asm volatile ("mov pc, %0\n\t" |
| 460 |
".global exec_loop\n\t"
|
| 461 |
"exec_loop:\n\t"
|
| 462 |
: /* no outputs */
|
| 463 |
: "r" (gen_func)
|
| 464 |
: "r1", "r2", "r3", "r8", "r9", "r10", "r12", "r14"); |
| 465 |
#elif defined(TARGET_I386) && defined(USE_CODE_COPY)
|
| 466 |
{
|
| 467 |
if (!(tb->cflags & CF_CODE_COPY)) {
|
| 468 |
if ((tb->cflags & CF_FP_USED) && env->native_fp_regs) {
|
| 469 |
save_native_fp_state(env); |
| 470 |
} |
| 471 |
gen_func(); |
| 472 |
} else {
|
| 473 |
if ((tb->cflags & CF_FP_USED) && !env->native_fp_regs) {
|
| 474 |
restore_native_fp_state(env); |
| 475 |
} |
| 476 |
/* we work with native eflags */
|
| 477 |
CC_SRC = cc_table[CC_OP].compute_all(); |
| 478 |
CC_OP = CC_OP_EFLAGS; |
| 479 |
asm(".globl exec_loop\n" |
| 480 |
"\n"
|
| 481 |
"debug1:\n"
|
| 482 |
" pushl %%ebp\n"
|
| 483 |
" fs movl %10, %9\n"
|
| 484 |
" fs movl %11, %%eax\n"
|
| 485 |
" andl $0x400, %%eax\n"
|
| 486 |
" fs orl %8, %%eax\n"
|
| 487 |
" pushl %%eax\n"
|
| 488 |
" popf\n"
|
| 489 |
" fs movl %%esp, %12\n"
|
| 490 |
" fs movl %0, %%eax\n"
|
| 491 |
" fs movl %1, %%ecx\n"
|
| 492 |
" fs movl %2, %%edx\n"
|
| 493 |
" fs movl %3, %%ebx\n"
|
| 494 |
" fs movl %4, %%esp\n"
|
| 495 |
" fs movl %5, %%ebp\n"
|
| 496 |
" fs movl %6, %%esi\n"
|
| 497 |
" fs movl %7, %%edi\n"
|
| 498 |
" fs jmp *%9\n"
|
| 499 |
"exec_loop:\n"
|
| 500 |
" fs movl %%esp, %4\n"
|
| 501 |
" fs movl %12, %%esp\n"
|
| 502 |
" fs movl %%eax, %0\n"
|
| 503 |
" fs movl %%ecx, %1\n"
|
| 504 |
" fs movl %%edx, %2\n"
|
| 505 |
" fs movl %%ebx, %3\n"
|
| 506 |
" fs movl %%ebp, %5\n"
|
| 507 |
" fs movl %%esi, %6\n"
|
| 508 |
" fs movl %%edi, %7\n"
|
| 509 |
" pushf\n"
|
| 510 |
" popl %%eax\n"
|
| 511 |
" movl %%eax, %%ecx\n"
|
| 512 |
" andl $0x400, %%ecx\n"
|
| 513 |
" shrl $9, %%ecx\n"
|
| 514 |
" andl $0x8d5, %%eax\n"
|
| 515 |
" fs movl %%eax, %8\n"
|
| 516 |
" movl $1, %%eax\n"
|
| 517 |
" subl %%ecx, %%eax\n"
|
| 518 |
" fs movl %%eax, %11\n"
|
| 519 |
" fs movl %9, %%ebx\n" /* get T0 value */ |
| 520 |
" popl %%ebp\n"
|
| 521 |
: |
| 522 |
: "m" (*(uint8_t *)offsetof(CPUState, regs[0])), |
| 523 |
"m" (*(uint8_t *)offsetof(CPUState, regs[1])), |
| 524 |
"m" (*(uint8_t *)offsetof(CPUState, regs[2])), |
| 525 |
"m" (*(uint8_t *)offsetof(CPUState, regs[3])), |
| 526 |
"m" (*(uint8_t *)offsetof(CPUState, regs[4])), |
| 527 |
"m" (*(uint8_t *)offsetof(CPUState, regs[5])), |
| 528 |
"m" (*(uint8_t *)offsetof(CPUState, regs[6])), |
| 529 |
"m" (*(uint8_t *)offsetof(CPUState, regs[7])), |
| 530 |
"m" (*(uint8_t *)offsetof(CPUState, cc_src)),
|
| 531 |
"m" (*(uint8_t *)offsetof(CPUState, tmp0)),
|
| 532 |
"a" (gen_func),
|
| 533 |
"m" (*(uint8_t *)offsetof(CPUState, df)),
|
| 534 |
"m" (*(uint8_t *)offsetof(CPUState, saved_esp))
|
| 535 |
: "%ecx", "%edx" |
| 536 |
); |
| 537 |
} |
| 538 |
} |
| 539 |
#else
|
| 540 |
gen_func(); |
| 541 |
#endif
|
| 542 |
env->current_tb = NULL;
|
| 543 |
/* reset soft MMU for next block (it can currently
|
| 544 |
only be set by a memory fault) */
|
| 545 |
#if defined(TARGET_I386) && !defined(CONFIG_SOFTMMU)
|
| 546 |
if (env->hflags & HF_SOFTMMU_MASK) {
|
| 547 |
env->hflags &= ~HF_SOFTMMU_MASK; |
| 548 |
/* do not allow linking to another block */
|
| 549 |
T0 = 0;
|
| 550 |
} |
| 551 |
#endif
|
| 552 |
} |
| 553 |
} else {
|
| 554 |
env_to_regs(); |
| 555 |
} |
| 556 |
} /* for(;;) */
|
| 557 |
|
| 558 |
|
| 559 |
#if defined(TARGET_I386)
|
| 560 |
#if defined(USE_CODE_COPY)
|
| 561 |
if (env->native_fp_regs) {
|
| 562 |
save_native_fp_state(env); |
| 563 |
} |
| 564 |
#endif
|
| 565 |
/* restore flags in standard format */
|
| 566 |
env->eflags = env->eflags | cc_table[CC_OP].compute_all() | (DF & DF_MASK); |
| 567 |
|
| 568 |
/* restore global registers */
|
| 569 |
#ifdef reg_EAX
|
| 570 |
EAX = saved_EAX; |
| 571 |
#endif
|
| 572 |
#ifdef reg_ECX
|
| 573 |
ECX = saved_ECX; |
| 574 |
#endif
|
| 575 |
#ifdef reg_EDX
|
| 576 |
EDX = saved_EDX; |
| 577 |
#endif
|
| 578 |
#ifdef reg_EBX
|
| 579 |
EBX = saved_EBX; |
| 580 |
#endif
|
| 581 |
#ifdef reg_ESP
|
| 582 |
ESP = saved_ESP; |
| 583 |
#endif
|
| 584 |
#ifdef reg_EBP
|
| 585 |
EBP = saved_EBP; |
| 586 |
#endif
|
| 587 |
#ifdef reg_ESI
|
| 588 |
ESI = saved_ESI; |
| 589 |
#endif
|
| 590 |
#ifdef reg_EDI
|
| 591 |
EDI = saved_EDI; |
| 592 |
#endif
|
| 593 |
#elif defined(TARGET_ARM)
|
| 594 |
env->cpsr = compute_cpsr(); |
| 595 |
#elif defined(TARGET_SPARC)
|
| 596 |
#elif defined(TARGET_PPC)
|
| 597 |
#else
|
| 598 |
#error unsupported target CPU
|
| 599 |
#endif
|
| 600 |
#ifdef __sparc__
|
| 601 |
asm volatile ("mov %0, %%i7" : : "r" (saved_i7)); |
| 602 |
#endif
|
| 603 |
T0 = saved_T0; |
| 604 |
T1 = saved_T1; |
| 605 |
T2 = saved_T2; |
| 606 |
env = saved_env; |
| 607 |
return ret;
|
| 608 |
} |
| 609 |
|
| 610 |
/* must only be called from the generated code as an exception can be
|
| 611 |
generated */
|
| 612 |
void tb_invalidate_page_range(target_ulong start, target_ulong end)
|
| 613 |
{
|
| 614 |
/* XXX: cannot enable it yet because it yields to MMU exception
|
| 615 |
where NIP != read address on PowerPC */
|
| 616 |
#if 0
|
| 617 |
target_ulong phys_addr;
|
| 618 |
phys_addr = get_phys_addr_code(env, start);
|
| 619 |
tb_invalidate_phys_page_range(phys_addr, phys_addr + end - start, 0);
|
| 620 |
#endif
|
| 621 |
} |
| 622 |
|
| 623 |
#if defined(TARGET_I386) && defined(CONFIG_USER_ONLY)
|
| 624 |
|
| 625 |
void cpu_x86_load_seg(CPUX86State *s, int seg_reg, int selector) |
| 626 |
{
|
| 627 |
CPUX86State *saved_env; |
| 628 |
|
| 629 |
saved_env = env; |
| 630 |
env = s; |
| 631 |
if (!(env->cr[0] & CR0_PE_MASK) || (env->eflags & VM_MASK)) { |
| 632 |
selector &= 0xffff;
|
| 633 |
cpu_x86_load_seg_cache(env, seg_reg, selector, |
| 634 |
(uint8_t *)(selector << 4), 0xffff, 0); |
| 635 |
} else {
|
| 636 |
load_seg(seg_reg, selector); |
| 637 |
} |
| 638 |
env = saved_env; |
| 639 |
} |
| 640 |
|
| 641 |
void cpu_x86_fsave(CPUX86State *s, uint8_t *ptr, int data32) |
| 642 |
{
|
| 643 |
CPUX86State *saved_env; |
| 644 |
|
| 645 |
saved_env = env; |
| 646 |
env = s; |
| 647 |
|
| 648 |
helper_fsave(ptr, data32); |
| 649 |
|
| 650 |
env = saved_env; |
| 651 |
} |
| 652 |
|
| 653 |
void cpu_x86_frstor(CPUX86State *s, uint8_t *ptr, int data32) |
| 654 |
{
|
| 655 |
CPUX86State *saved_env; |
| 656 |
|
| 657 |
saved_env = env; |
| 658 |
env = s; |
| 659 |
|
| 660 |
helper_frstor(ptr, data32); |
| 661 |
|
| 662 |
env = saved_env; |
| 663 |
} |
| 664 |
|
| 665 |
#endif /* TARGET_I386 */ |
| 666 |
|
| 667 |
#if !defined(CONFIG_SOFTMMU)
|
| 668 |
|
| 669 |
#if defined(TARGET_I386)
|
| 670 |
|
| 671 |
/* 'pc' is the host PC at which the exception was raised. 'address' is
|
| 672 |
the effective address of the memory exception. 'is_write' is 1 if a
|
| 673 |
write caused the exception and otherwise 0'. 'old_set' is the
|
| 674 |
signal set which should be restored */
|
| 675 |
static inline int handle_cpu_signal(unsigned long pc, unsigned long address, |
| 676 |
int is_write, sigset_t *old_set,
|
| 677 |
void *puc)
|
| 678 |
{
|
| 679 |
TranslationBlock *tb; |
| 680 |
int ret;
|
| 681 |
|
| 682 |
if (cpu_single_env)
|
| 683 |
env = cpu_single_env; /* XXX: find a correct solution for multithread */
|
| 684 |
#if defined(DEBUG_SIGNAL)
|
| 685 |
qemu_printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
|
| 686 |
pc, address, is_write, *(unsigned long *)old_set); |
| 687 |
#endif
|
| 688 |
/* XXX: locking issue */
|
| 689 |
if (is_write && page_unprotect(address, pc, puc)) {
|
| 690 |
return 1; |
| 691 |
} |
| 692 |
|
| 693 |
/* see if it is an MMU fault */
|
| 694 |
ret = cpu_x86_handle_mmu_fault(env, address, is_write, |
| 695 |
((env->hflags & HF_CPL_MASK) == 3), 0); |
| 696 |
if (ret < 0) |
| 697 |
return 0; /* not an MMU fault */ |
| 698 |
if (ret == 0) |
| 699 |
return 1; /* the MMU fault was handled without causing real CPU fault */ |
| 700 |
/* now we have a real cpu fault */
|
| 701 |
tb = tb_find_pc(pc); |
| 702 |
if (tb) {
|
| 703 |
/* the PC is inside the translated code. It means that we have
|
| 704 |
a virtual CPU fault */
|
| 705 |
cpu_restore_state(tb, env, pc, puc); |
| 706 |
} |
| 707 |
if (ret == 1) { |
| 708 |
#if 0
|
| 709 |
printf("PF exception: EIP=0x%08x CR2=0x%08x error=0x%x\n",
|
| 710 |
env->eip, env->cr[2], env->error_code);
|
| 711 |
#endif
|
| 712 |
/* we restore the process signal mask as the sigreturn should
|
| 713 |
do it (XXX: use sigsetjmp) */
|
| 714 |
sigprocmask(SIG_SETMASK, old_set, NULL);
|
| 715 |
raise_exception_err(EXCP0E_PAGE, env->error_code); |
| 716 |
} else {
|
| 717 |
/* activate soft MMU for this block */
|
| 718 |
env->hflags |= HF_SOFTMMU_MASK; |
| 719 |
cpu_resume_from_signal(env, puc); |
| 720 |
} |
| 721 |
/* never comes here */
|
| 722 |
return 1; |
| 723 |
} |
| 724 |
|
| 725 |
#elif defined(TARGET_ARM)
|
| 726 |
static inline int handle_cpu_signal(unsigned long pc, unsigned long address, |
| 727 |
int is_write, sigset_t *old_set,
|
| 728 |
void *puc)
|
| 729 |
{
|
| 730 |
/* XXX: do more */
|
| 731 |
return 0; |
| 732 |
} |
| 733 |
#elif defined(TARGET_SPARC)
|
| 734 |
static inline int handle_cpu_signal(unsigned long pc, unsigned long address, |
| 735 |
int is_write, sigset_t *old_set,
|
| 736 |
void *puc)
|
| 737 |
{
|
| 738 |
/* XXX: locking issue */
|
| 739 |
if (is_write && page_unprotect(address, pc, puc)) {
|
| 740 |
return 1; |
| 741 |
} |
| 742 |
return 0; |
| 743 |
} |
| 744 |
#elif defined (TARGET_PPC)
|
| 745 |
static inline int handle_cpu_signal(unsigned long pc, unsigned long address, |
| 746 |
int is_write, sigset_t *old_set,
|
| 747 |
void *puc)
|
| 748 |
{
|
| 749 |
TranslationBlock *tb; |
| 750 |
int ret;
|
| 751 |
|
| 752 |
#if 1 |
| 753 |
if (cpu_single_env)
|
| 754 |
env = cpu_single_env; /* XXX: find a correct solution for multithread */
|
| 755 |
#endif
|
| 756 |
#if defined(DEBUG_SIGNAL)
|
| 757 |
printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
|
| 758 |
pc, address, is_write, *(unsigned long *)old_set); |
| 759 |
#endif
|
| 760 |
/* XXX: locking issue */
|
| 761 |
if (is_write && page_unprotect(address, pc, puc)) {
|
| 762 |
return 1; |
| 763 |
} |
| 764 |
|
| 765 |
/* see if it is an MMU fault */
|
| 766 |
ret = cpu_ppc_handle_mmu_fault(env, address, is_write, msr_pr, 0);
|
| 767 |
if (ret < 0) |
| 768 |
return 0; /* not an MMU fault */ |
| 769 |
if (ret == 0) |
| 770 |
return 1; /* the MMU fault was handled without causing real CPU fault */ |
| 771 |
|
| 772 |
/* now we have a real cpu fault */
|
| 773 |
tb = tb_find_pc(pc); |
| 774 |
if (tb) {
|
| 775 |
/* the PC is inside the translated code. It means that we have
|
| 776 |
a virtual CPU fault */
|
| 777 |
cpu_restore_state(tb, env, pc, puc); |
| 778 |
} |
| 779 |
if (ret == 1) { |
| 780 |
#if 0
|
| 781 |
printf("PF exception: NIP=0x%08x error=0x%x %p\n",
|
| 782 |
env->nip, env->error_code, tb);
|
| 783 |
#endif
|
| 784 |
/* we restore the process signal mask as the sigreturn should
|
| 785 |
do it (XXX: use sigsetjmp) */
|
| 786 |
sigprocmask(SIG_SETMASK, old_set, NULL);
|
| 787 |
do_raise_exception_err(env->exception_index, env->error_code); |
| 788 |
} else {
|
| 789 |
/* activate soft MMU for this block */
|
| 790 |
cpu_resume_from_signal(env, puc); |
| 791 |
} |
| 792 |
/* never comes here */
|
| 793 |
return 1; |
| 794 |
} |
| 795 |
#else
|
| 796 |
#error unsupported target CPU
|
| 797 |
#endif
|
| 798 |
|
| 799 |
#if defined(__i386__)
|
| 800 |
|
| 801 |
#if defined(USE_CODE_COPY)
|
| 802 |
static void cpu_send_trap(unsigned long pc, int trap, |
| 803 |
struct ucontext *uc)
|
| 804 |
{
|
| 805 |
TranslationBlock *tb; |
| 806 |
|
| 807 |
if (cpu_single_env)
|
| 808 |
env = cpu_single_env; /* XXX: find a correct solution for multithread */
|
| 809 |
/* now we have a real cpu fault */
|
| 810 |
tb = tb_find_pc(pc); |
| 811 |
if (tb) {
|
| 812 |
/* the PC is inside the translated code. It means that we have
|
| 813 |
a virtual CPU fault */
|
| 814 |
cpu_restore_state(tb, env, pc, uc); |
| 815 |
} |
| 816 |
sigprocmask(SIG_SETMASK, &uc->uc_sigmask, NULL);
|
| 817 |
raise_exception_err(trap, env->error_code); |
| 818 |
} |
| 819 |
#endif
|
| 820 |
|
| 821 |
int cpu_signal_handler(int host_signum, struct siginfo *info, |
| 822 |
void *puc)
|
| 823 |
{
|
| 824 |
struct ucontext *uc = puc;
|
| 825 |
unsigned long pc; |
| 826 |
int trapno;
|
| 827 |
|
| 828 |
#ifndef REG_EIP
|
| 829 |
/* for glibc 2.1 */
|
| 830 |
#define REG_EIP EIP
|
| 831 |
#define REG_ERR ERR
|
| 832 |
#define REG_TRAPNO TRAPNO
|
| 833 |
#endif
|
| 834 |
pc = uc->uc_mcontext.gregs[REG_EIP]; |
| 835 |
trapno = uc->uc_mcontext.gregs[REG_TRAPNO]; |
| 836 |
#if defined(TARGET_I386) && defined(USE_CODE_COPY)
|
| 837 |
if (trapno == 0x00 || trapno == 0x05) { |
| 838 |
/* send division by zero or bound exception */
|
| 839 |
cpu_send_trap(pc, trapno, uc); |
| 840 |
return 1; |
| 841 |
} else
|
| 842 |
#endif
|
| 843 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
| 844 |
trapno == 0xe ?
|
| 845 |
(uc->uc_mcontext.gregs[REG_ERR] >> 1) & 1 : 0, |
| 846 |
&uc->uc_sigmask, puc); |
| 847 |
} |
| 848 |
|
| 849 |
#elif defined(__x86_64__)
|
| 850 |
|
| 851 |
int cpu_signal_handler(int host_signum, struct siginfo *info, |
| 852 |
void *puc)
|
| 853 |
{
|
| 854 |
struct ucontext *uc = puc;
|
| 855 |
unsigned long pc; |
| 856 |
|
| 857 |
pc = uc->uc_mcontext.gregs[REG_RIP]; |
| 858 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
| 859 |
uc->uc_mcontext.gregs[REG_TRAPNO] == 0xe ?
|
| 860 |
(uc->uc_mcontext.gregs[REG_ERR] >> 1) & 1 : 0, |
| 861 |
&uc->uc_sigmask, puc); |
| 862 |
} |
| 863 |
|
| 864 |
#elif defined(__powerpc__)
|
| 865 |
|
| 866 |
/***********************************************************************
|
| 867 |
* signal context platform-specific definitions
|
| 868 |
* From Wine
|
| 869 |
*/
|
| 870 |
#ifdef linux
|
| 871 |
/* All Registers access - only for local access */
|
| 872 |
# define REG_sig(reg_name, context) ((context)->uc_mcontext.regs->reg_name)
|
| 873 |
/* Gpr Registers access */
|
| 874 |
# define GPR_sig(reg_num, context) REG_sig(gpr[reg_num], context)
|
| 875 |
# define IAR_sig(context) REG_sig(nip, context) /* Program counter */ |
| 876 |
# define MSR_sig(context) REG_sig(msr, context) /* Machine State Register (Supervisor) */ |
| 877 |
# define CTR_sig(context) REG_sig(ctr, context) /* Count register */ |
| 878 |
# define XER_sig(context) REG_sig(xer, context) /* User's integer exception register */ |
| 879 |
# define LR_sig(context) REG_sig(link, context) /* Link register */ |
| 880 |
# define CR_sig(context) REG_sig(ccr, context) /* Condition register */ |
| 881 |
/* Float Registers access */
|
| 882 |
# define FLOAT_sig(reg_num, context) (((double*)((char*)((context)->uc_mcontext.regs+48*4)))[reg_num]) |
| 883 |
# define FPSCR_sig(context) (*(int*)((char*)((context)->uc_mcontext.regs+(48+32*2)*4))) |
| 884 |
/* Exception Registers access */
|
| 885 |
# define DAR_sig(context) REG_sig(dar, context)
|
| 886 |
# define DSISR_sig(context) REG_sig(dsisr, context)
|
| 887 |
# define TRAP_sig(context) REG_sig(trap, context)
|
| 888 |
#endif /* linux */ |
| 889 |
|
| 890 |
#ifdef __APPLE__
|
| 891 |
# include <sys/ucontext.h> |
| 892 |
typedef struct ucontext SIGCONTEXT; |
| 893 |
/* All Registers access - only for local access */
|
| 894 |
# define REG_sig(reg_name, context) ((context)->uc_mcontext->ss.reg_name)
|
| 895 |
# define FLOATREG_sig(reg_name, context) ((context)->uc_mcontext->fs.reg_name)
|
| 896 |
# define EXCEPREG_sig(reg_name, context) ((context)->uc_mcontext->es.reg_name)
|
| 897 |
# define VECREG_sig(reg_name, context) ((context)->uc_mcontext->vs.reg_name)
|
| 898 |
/* Gpr Registers access */
|
| 899 |
# define GPR_sig(reg_num, context) REG_sig(r##reg_num, context) |
| 900 |
# define IAR_sig(context) REG_sig(srr0, context) /* Program counter */ |
| 901 |
# define MSR_sig(context) REG_sig(srr1, context) /* Machine State Register (Supervisor) */ |
| 902 |
# define CTR_sig(context) REG_sig(ctr, context)
|
| 903 |
# define XER_sig(context) REG_sig(xer, context) /* Link register */ |
| 904 |
# define LR_sig(context) REG_sig(lr, context) /* User's integer exception register */ |
| 905 |
# define CR_sig(context) REG_sig(cr, context) /* Condition register */ |
| 906 |
/* Float Registers access */
|
| 907 |
# define FLOAT_sig(reg_num, context) FLOATREG_sig(fpregs[reg_num], context)
|
| 908 |
# define FPSCR_sig(context) ((double)FLOATREG_sig(fpscr, context)) |
| 909 |
/* Exception Registers access */
|
| 910 |
# define DAR_sig(context) EXCEPREG_sig(dar, context) /* Fault registers for coredump */ |
| 911 |
# define DSISR_sig(context) EXCEPREG_sig(dsisr, context)
|
| 912 |
# define TRAP_sig(context) EXCEPREG_sig(exception, context) /* number of powerpc exception taken */ |
| 913 |
#endif /* __APPLE__ */ |
| 914 |
|
| 915 |
int cpu_signal_handler(int host_signum, struct siginfo *info, |
| 916 |
void *puc)
|
| 917 |
{
|
| 918 |
struct ucontext *uc = puc;
|
| 919 |
unsigned long pc; |
| 920 |
int is_write;
|
| 921 |
|
| 922 |
pc = IAR_sig(uc); |
| 923 |
is_write = 0;
|
| 924 |
#if 0
|
| 925 |
/* ppc 4xx case */
|
| 926 |
if (DSISR_sig(uc) & 0x00800000)
|
| 927 |
is_write = 1;
|
| 928 |
#else
|
| 929 |
if (TRAP_sig(uc) != 0x400 && (DSISR_sig(uc) & 0x02000000)) |
| 930 |
is_write = 1;
|
| 931 |
#endif
|
| 932 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
| 933 |
is_write, &uc->uc_sigmask, puc); |
| 934 |
} |
| 935 |
|
| 936 |
#elif defined(__alpha__)
|
| 937 |
|
| 938 |
int cpu_signal_handler(int host_signum, struct siginfo *info, |
| 939 |
void *puc)
|
| 940 |
{
|
| 941 |
struct ucontext *uc = puc;
|
| 942 |
uint32_t *pc = uc->uc_mcontext.sc_pc; |
| 943 |
uint32_t insn = *pc; |
| 944 |
int is_write = 0; |
| 945 |
|
| 946 |
/* XXX: need kernel patch to get write flag faster */
|
| 947 |
switch (insn >> 26) { |
| 948 |
case 0x0d: // stw |
| 949 |
case 0x0e: // stb |
| 950 |
case 0x0f: // stq_u |
| 951 |
case 0x24: // stf |
| 952 |
case 0x25: // stg |
| 953 |
case 0x26: // sts |
| 954 |
case 0x27: // stt |
| 955 |
case 0x2c: // stl |
| 956 |
case 0x2d: // stq |
| 957 |
case 0x2e: // stl_c |
| 958 |
case 0x2f: // stq_c |
| 959 |
is_write = 1;
|
| 960 |
} |
| 961 |
|
| 962 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
| 963 |
is_write, &uc->uc_sigmask, puc); |
| 964 |
} |
| 965 |
#elif defined(__sparc__)
|
| 966 |
|
| 967 |
int cpu_signal_handler(int host_signum, struct siginfo *info, |
| 968 |
void *puc)
|
| 969 |
{
|
| 970 |
uint32_t *regs = (uint32_t *)(info + 1);
|
| 971 |
void *sigmask = (regs + 20); |
| 972 |
unsigned long pc; |
| 973 |
int is_write;
|
| 974 |
uint32_t insn; |
| 975 |
|
| 976 |
/* XXX: is there a standard glibc define ? */
|
| 977 |
pc = regs[1];
|
| 978 |
/* XXX: need kernel patch to get write flag faster */
|
| 979 |
is_write = 0;
|
| 980 |
insn = *(uint32_t *)pc; |
| 981 |
if ((insn >> 30) == 3) { |
| 982 |
switch((insn >> 19) & 0x3f) { |
| 983 |
case 0x05: // stb |
| 984 |
case 0x06: // sth |
| 985 |
case 0x04: // st |
| 986 |
case 0x07: // std |
| 987 |
case 0x24: // stf |
| 988 |
case 0x27: // stdf |
| 989 |
case 0x25: // stfsr |
| 990 |
is_write = 1;
|
| 991 |
break;
|
| 992 |
} |
| 993 |
} |
| 994 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
| 995 |
is_write, sigmask, NULL);
|
| 996 |
} |
| 997 |
|
| 998 |
#elif defined(__arm__)
|
| 999 |
|
| 1000 |
int cpu_signal_handler(int host_signum, struct siginfo *info, |
| 1001 |
void *puc)
|
| 1002 |
{
|
| 1003 |
struct ucontext *uc = puc;
|
| 1004 |
unsigned long pc; |
| 1005 |
int is_write;
|
| 1006 |
|
| 1007 |
pc = uc->uc_mcontext.gregs[R15]; |
| 1008 |
/* XXX: compute is_write */
|
| 1009 |
is_write = 0;
|
| 1010 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
| 1011 |
is_write, |
| 1012 |
&uc->uc_sigmask); |
| 1013 |
} |
| 1014 |
|
| 1015 |
#elif defined(__mc68000)
|
| 1016 |
|
| 1017 |
int cpu_signal_handler(int host_signum, struct siginfo *info, |
| 1018 |
void *puc)
|
| 1019 |
{
|
| 1020 |
struct ucontext *uc = puc;
|
| 1021 |
unsigned long pc; |
| 1022 |
int is_write;
|
| 1023 |
|
| 1024 |
pc = uc->uc_mcontext.gregs[16];
|
| 1025 |
/* XXX: compute is_write */
|
| 1026 |
is_write = 0;
|
| 1027 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
| 1028 |
is_write, |
| 1029 |
&uc->uc_sigmask, puc); |
| 1030 |
} |
| 1031 |
|
| 1032 |
#else
|
| 1033 |
|
| 1034 |
#error host CPU specific signal handler needed
|
| 1035 |
|
| 1036 |
#endif
|
| 1037 |
|
| 1038 |
#endif /* !defined(CONFIG_SOFTMMU) */ |