diff options
Diffstat (limited to 'qemu/target-i386/excp_helper.c')
| -rw-r--r-- | qemu/target-i386/excp_helper.c | 136 |
1 files changed, 0 insertions, 136 deletions
diff --git a/qemu/target-i386/excp_helper.c b/qemu/target-i386/excp_helper.c deleted file mode 100644 index ef37f4240..000000000 --- a/qemu/target-i386/excp_helper.c +++ /dev/null @@ -1,136 +0,0 @@ -/* - * x86 exception helpers - * - * Copyright (c) 2003 Fabrice Bellard - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, see <http://www.gnu.org/licenses/>. - */ - -#include "qemu/osdep.h" -#include "cpu.h" -#include "qemu/log.h" -#include "sysemu/sysemu.h" -#include "exec/helper-proto.h" - -void helper_raise_interrupt(CPUX86State *env, int intno, int next_eip_addend) -{ - raise_interrupt(env, intno, 1, 0, next_eip_addend); -} - -void helper_raise_exception(CPUX86State *env, int exception_index) -{ - raise_exception(env, exception_index); -} - -/* - * Check nested exceptions and change to double or triple fault if - * needed. It should only be called, if this is not an interrupt. - * Returns the new exception number. - */ -static int check_exception(CPUX86State *env, int intno, int *error_code) -{ - int first_contributory = env->old_exception == 0 || - (env->old_exception >= 10 && - env->old_exception <= 13); - int second_contributory = intno == 0 || - (intno >= 10 && intno <= 13); - - qemu_log_mask(CPU_LOG_INT, "check_exception old: 0x%x new 0x%x\n", - env->old_exception, intno); - -#if !defined(CONFIG_USER_ONLY) - if (env->old_exception == EXCP08_DBLE) { - if (env->hflags & HF_SVMI_MASK) { - cpu_vmexit(env, SVM_EXIT_SHUTDOWN, 0); /* does not return */ - } - - qemu_log_mask(CPU_LOG_RESET, "Triple fault\n"); - - qemu_system_reset_request(); - return EXCP_HLT; - } -#endif - - if ((first_contributory && second_contributory) - || (env->old_exception == EXCP0E_PAGE && - (second_contributory || (intno == EXCP0E_PAGE)))) { - intno = EXCP08_DBLE; - *error_code = 0; - } - - if (second_contributory || (intno == EXCP0E_PAGE) || - (intno == EXCP08_DBLE)) { - env->old_exception = intno; - } - - return intno; -} - -/* - * Signal an interruption. It is executed in the main CPU loop. - * is_int is TRUE if coming from the int instruction. next_eip is the - * env->eip value AFTER the interrupt instruction. It is only relevant if - * is_int is TRUE. - */ -static void QEMU_NORETURN raise_interrupt2(CPUX86State *env, int intno, - int is_int, int error_code, - int next_eip_addend, - uintptr_t retaddr) -{ - CPUState *cs = CPU(x86_env_get_cpu(env)); - - if (!is_int) { - cpu_svm_check_intercept_param(env, SVM_EXIT_EXCP_BASE + intno, - error_code); - intno = check_exception(env, intno, &error_code); - } else { - cpu_svm_check_intercept_param(env, SVM_EXIT_SWINT, 0); - } - - cs->exception_index = intno; - env->error_code = error_code; - env->exception_is_int = is_int; - env->exception_next_eip = env->eip + next_eip_addend; - cpu_loop_exit_restore(cs, retaddr); -} - -/* shortcuts to generate exceptions */ - -void QEMU_NORETURN raise_interrupt(CPUX86State *env, int intno, int is_int, - int error_code, int next_eip_addend) -{ - raise_interrupt2(env, intno, is_int, error_code, next_eip_addend, 0); -} - -void raise_exception_err(CPUX86State *env, int exception_index, - int error_code) -{ - raise_interrupt2(env, exception_index, 0, error_code, 0, 0); -} - -void raise_exception_err_ra(CPUX86State *env, int exception_index, - int error_code, uintptr_t retaddr) -{ - raise_interrupt2(env, exception_index, 0, error_code, 0, retaddr); -} - -void raise_exception(CPUX86State *env, int exception_index) -{ - raise_interrupt2(env, exception_index, 0, 0, 0, 0); -} - -void raise_exception_ra(CPUX86State *env, int exception_index, uintptr_t retaddr) -{ - raise_interrupt2(env, exception_index, 0, 0, 0, retaddr); -} |