2003-03-07 00:23:54 +01:00
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/*
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2012-02-06 07:02:55 +01:00
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* emulator main execution loop
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2007-09-16 23:08:06 +02:00
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*
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2005-04-06 22:47:48 +02:00
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* Copyright (c) 2003-2005 Fabrice Bellard
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2003-03-07 00:23:54 +01:00
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*
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2003-03-23 21:17:16 +01:00
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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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2003-03-07 00:23:54 +01:00
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*
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2003-03-23 21:17:16 +01:00
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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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2003-03-07 00:23:54 +01:00
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*
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2003-03-23 21:17:16 +01:00
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* You should have received a copy of the GNU Lesser General Public
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2009-07-16 22:47:01 +02:00
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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2003-03-07 00:23:54 +01:00
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*/
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2003-06-15 21:51:39 +02:00
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#include "config.h"
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2011-05-15 18:03:25 +02:00
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#include "cpu.h"
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2003-04-29 22:40:53 +02:00
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#include "disas.h"
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2008-05-10 12:55:51 +02:00
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#include "tcg.h"
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2010-06-25 16:56:49 +02:00
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#include "qemu-barrier.h"
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2012-03-28 15:42:02 +02:00
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#include "qtest.h"
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2003-03-07 00:23:54 +01:00
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2003-11-19 23:12:02 +01:00
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int tb_invalidated_flag;
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2009-07-27 16:13:05 +02:00
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//#define CONFIG_DEBUG_EXEC
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2003-03-07 00:23:54 +01:00
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2012-03-14 01:38:32 +01:00
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bool qemu_cpu_has_work(CPUArchState *env)
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2009-04-24 20:03:20 +02:00
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{
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return cpu_has_work(env);
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}
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2012-03-14 01:38:32 +01:00
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void cpu_loop_exit(CPUArchState *env)
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2003-06-15 21:51:39 +02:00
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{
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2011-05-15 18:03:25 +02:00
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env->current_tb = NULL;
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longjmp(env->jmp_env, 1);
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2003-06-15 21:51:39 +02:00
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}
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2007-06-03 19:44:37 +02:00
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2004-04-25 23:21:33 +02:00
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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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2011-05-21 10:42:35 +02:00
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#if defined(CONFIG_SOFTMMU)
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2012-03-14 01:38:32 +01:00
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void cpu_resume_from_signal(CPUArchState *env, void *puc)
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2011-05-21 10:42:35 +02:00
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{
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/* XXX: restore cpu registers saved in host registers */
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env->exception_index = -1;
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longjmp(env->jmp_env, 1);
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}
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#endif
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2004-04-25 23:21:33 +02:00
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2008-06-29 03:03:05 +02:00
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/* Execute the code without caching the generated code. An interpreter
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could be used if available. */
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2012-03-14 01:38:32 +01:00
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static void cpu_exec_nocache(CPUArchState *env, int max_cycles,
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2011-05-15 18:03:25 +02:00
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TranslationBlock *orig_tb)
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2008-06-29 03:03:05 +02:00
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{
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2012-03-16 23:50:54 +01:00
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tcg_target_ulong next_tb;
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2008-06-29 03:03:05 +02:00
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TranslationBlock *tb;
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/* Should never happen.
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We only end up here when an existing TB is too long. */
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if (max_cycles > CF_COUNT_MASK)
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max_cycles = CF_COUNT_MASK;
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tb = tb_gen_code(env, orig_tb->pc, orig_tb->cs_base, orig_tb->flags,
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max_cycles);
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env->current_tb = tb;
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/* execute the generated code */
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2011-05-15 18:03:25 +02:00
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next_tb = tcg_qemu_tb_exec(env, tb->tc_ptr);
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2010-01-15 09:42:07 +01:00
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env->current_tb = NULL;
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2008-06-29 03:03:05 +02:00
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if ((next_tb & 3) == 2) {
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/* Restore PC. This may happen if async event occurs before
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the TB starts executing. */
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2008-11-18 20:36:03 +01:00
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cpu_pc_from_tb(env, tb);
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2008-06-29 03:03:05 +02:00
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}
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tb_phys_invalidate(tb, -1);
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tb_free(tb);
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}
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2012-03-14 01:38:32 +01:00
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static TranslationBlock *tb_find_slow(CPUArchState *env,
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2011-05-15 18:03:25 +02:00
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target_ulong pc,
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2005-11-20 11:35:40 +01:00
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target_ulong cs_base,
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2007-09-21 00:47:42 +02:00
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uint64_t flags)
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2005-11-20 11:35:40 +01:00
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{
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TranslationBlock *tb, **ptb1;
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unsigned int h;
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2011-09-04 13:06:22 +02:00
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tb_page_addr_t phys_pc, phys_page1;
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2010-03-12 17:54:58 +01:00
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target_ulong virt_page2;
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2007-09-17 10:09:54 +02:00
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2005-11-20 11:35:40 +01:00
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tb_invalidated_flag = 0;
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2007-09-17 10:09:54 +02:00
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2005-11-20 11:35:40 +01:00
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/* find translated block using physical mappings */
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2010-03-12 17:54:58 +01:00
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phys_pc = get_page_addr_code(env, pc);
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2005-11-20 11:35:40 +01:00
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phys_page1 = phys_pc & TARGET_PAGE_MASK;
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h = tb_phys_hash_func(phys_pc);
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ptb1 = &tb_phys_hash[h];
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for(;;) {
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tb = *ptb1;
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if (!tb)
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goto not_found;
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2007-09-16 23:08:06 +02:00
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if (tb->pc == pc &&
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2005-11-20 11:35:40 +01:00
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tb->page_addr[0] == phys_page1 &&
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2007-09-16 23:08:06 +02:00
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tb->cs_base == cs_base &&
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2005-11-20 11:35:40 +01:00
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tb->flags == flags) {
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/* check next page if needed */
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if (tb->page_addr[1] != -1) {
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2011-09-04 13:06:22 +02:00
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tb_page_addr_t phys_page2;
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2007-09-16 23:08:06 +02:00
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virt_page2 = (pc & TARGET_PAGE_MASK) +
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2005-11-20 11:35:40 +01:00
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TARGET_PAGE_SIZE;
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2010-03-12 17:54:58 +01:00
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phys_page2 = get_page_addr_code(env, virt_page2);
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2005-11-20 11:35:40 +01:00
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if (tb->page_addr[1] == phys_page2)
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goto found;
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} else {
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goto found;
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}
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}
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ptb1 = &tb->phys_hash_next;
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}
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not_found:
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2008-06-29 03:03:05 +02:00
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/* if no translated code available, then translate it now */
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tb = tb_gen_code(env, pc, cs_base, flags, 0);
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2007-09-17 10:09:54 +02:00
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2005-11-20 11:35:40 +01:00
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found:
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2010-12-02 14:12:46 +01:00
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/* Move the last found TB to the head of the list */
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if (likely(*ptb1)) {
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*ptb1 = tb->phys_hash_next;
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tb->phys_hash_next = tb_phys_hash[h];
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tb_phys_hash[h] = tb;
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}
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2005-11-20 11:35:40 +01:00
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/* we add the TB in the virtual pc hash table */
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env->tb_jmp_cache[tb_jmp_cache_hash_func(pc)] = tb;
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return tb;
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}
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2012-03-14 01:38:32 +01:00
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static inline TranslationBlock *tb_find_fast(CPUArchState *env)
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2005-11-20 11:35:40 +01:00
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{
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TranslationBlock *tb;
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target_ulong cs_base, pc;
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2008-11-18 20:46:41 +01:00
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int flags;
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2005-11-20 11:35:40 +01:00
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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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2008-11-18 20:46:41 +01:00
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cpu_get_tb_cpu_state(env, &pc, &cs_base, &flags);
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2008-02-01 23:18:51 +01:00
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tb = env->tb_jmp_cache[tb_jmp_cache_hash_func(pc)];
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2008-07-03 19:57:36 +02:00
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if (unlikely(!tb || tb->pc != pc || tb->cs_base != cs_base ||
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tb->flags != flags)) {
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2011-05-15 18:03:25 +02:00
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tb = tb_find_slow(env, pc, cs_base, flags);
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2005-11-20 11:35:40 +01:00
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}
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return tb;
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}
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2011-03-15 12:26:13 +01:00
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static CPUDebugExcpHandler *debug_excp_handler;
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CPUDebugExcpHandler *cpu_set_debug_excp_handler(CPUDebugExcpHandler *handler)
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{
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CPUDebugExcpHandler *old_handler = debug_excp_handler;
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debug_excp_handler = handler;
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return old_handler;
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}
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2012-03-14 01:38:32 +01:00
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static void cpu_handle_debug_exception(CPUArchState *env)
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2011-03-15 12:26:13 +01:00
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{
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CPUWatchpoint *wp;
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if (!env->watchpoint_hit) {
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QTAILQ_FOREACH(wp, &env->watchpoints, entry) {
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wp->flags &= ~BP_WATCHPOINT_HIT;
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}
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}
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if (debug_excp_handler) {
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debug_excp_handler(env);
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}
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}
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2003-03-07 00:23:54 +01:00
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/* main execution loop */
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2010-05-04 14:45:20 +02:00
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volatile sig_atomic_t exit_request;
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2012-03-14 01:38:32 +01:00
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int cpu_exec(CPUArchState *env)
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2003-03-07 00:23:54 +01:00
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{
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2012-05-04 19:39:23 +02:00
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#ifdef TARGET_PPC
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CPUState *cpu = ENV_GET_CPU(env);
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#endif
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2005-11-20 11:35:40 +01:00
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int ret, interrupt_request;
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TranslationBlock *tb;
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2005-01-04 00:35:10 +01:00
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uint8_t *tc_ptr;
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2012-03-16 23:50:54 +01:00
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tcg_target_ulong next_tb;
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2003-06-09 17:28:00 +02:00
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2011-05-15 18:03:25 +02:00
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if (env->halted) {
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if (!cpu_has_work(env)) {
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2011-03-12 17:43:56 +01:00
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return EXCP_HALTED;
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}
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2011-05-15 18:03:25 +02:00
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env->halted = 0;
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2011-03-12 17:43:56 +01:00
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}
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2005-11-23 22:02:53 +01:00
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2011-05-15 18:03:25 +02:00
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cpu_single_env = env;
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2003-06-15 21:51:39 +02:00
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2010-06-25 16:56:52 +02:00
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if (unlikely(exit_request)) {
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2010-05-04 14:45:20 +02:00
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env->exit_request = 1;
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}
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2007-06-03 20:45:53 +02:00
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#if defined(TARGET_I386)
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2011-02-07 12:19:18 +01:00
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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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2003-09-30 22:57:29 +02:00
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#elif defined(TARGET_SPARC)
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2006-10-22 02:18:54 +02:00
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#elif defined(TARGET_M68K)
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env->cc_op = CC_OP_FLAGS;
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env->cc_dest = env->sr & 0xf;
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env->cc_x = (env->sr >> 4) & 1;
|
2007-06-03 20:45:53 +02:00
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#elif defined(TARGET_ALPHA)
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#elif defined(TARGET_ARM)
|
2011-04-12 10:27:03 +02:00
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#elif defined(TARGET_UNICORE32)
|
2007-06-03 20:45:53 +02:00
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#elif defined(TARGET_PPC)
|
2011-07-22 07:58:39 +02:00
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env->reserve_addr = -1;
|
2011-02-17 23:45:02 +01:00
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#elif defined(TARGET_LM32)
|
2009-05-20 21:31:33 +02:00
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#elif defined(TARGET_MICROBLAZE)
|
2005-07-02 16:58:51 +02:00
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#elif defined(TARGET_MIPS)
|
2006-04-27 23:07:38 +02:00
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#elif defined(TARGET_SH4)
|
2007-10-08 15:16:14 +02:00
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#elif defined(TARGET_CRIS)
|
2009-12-05 12:44:21 +01:00
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#elif defined(TARGET_S390X)
|
2011-09-06 01:55:25 +02:00
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#elif defined(TARGET_XTENSA)
|
2006-04-27 23:07:38 +02:00
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/* XXXXX */
|
2003-06-15 21:51:39 +02:00
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#else
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#error unsupported target CPU
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#endif
|
2003-06-24 15:22:59 +02:00
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env->exception_index = -1;
|
2003-05-10 15:13:54 +02:00
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|
2003-03-07 00:23:54 +01:00
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/* prepare setjmp context for exception handling */
|
2003-06-24 15:22:59 +02:00
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for(;;) {
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if (setjmp(env->jmp_env) == 0) {
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|
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/* if an exception is pending, we execute it here */
|
|
|
|
if (env->exception_index >= 0) {
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|
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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;
|
2011-03-15 12:26:13 +01:00
|
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if (ret == EXCP_DEBUG) {
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cpu_handle_debug_exception(env);
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}
|
2003-06-24 15:22:59 +02:00
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break;
|
2009-01-14 20:40:27 +01:00
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} else {
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|
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#if defined(CONFIG_USER_ONLY)
|
2003-06-24 15:22:59 +02:00
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/* if user mode only, we simulate a fake exception
|
2006-12-07 19:28:42 +01:00
|
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|
which will be handled outside the cpu execution
|
2003-06-24 15:22:59 +02:00
|
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|
loop */
|
2003-06-25 18:12:37 +02:00
|
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#if defined(TARGET_I386)
|
2011-05-16 21:38:48 +02:00
|
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do_interrupt(env);
|
2003-06-25 18:12:37 +02:00
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#endif
|
2003-06-24 15:22:59 +02:00
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ret = env->exception_index;
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break;
|
2009-01-14 20:40:27 +01:00
|
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#else
|
2005-11-26 11:38:39 +01:00
|
|
|
do_interrupt(env);
|
2010-01-15 09:41:01 +01:00
|
|
|
env->exception_index = -1;
|
2003-06-25 18:12:37 +02:00
|
|
|
#endif
|
2003-06-24 15:22:59 +02:00
|
|
|
}
|
2007-09-16 23:08:06 +02:00
|
|
|
}
|
2005-02-10 23:05:51 +01:00
|
|
|
|
2008-05-04 08:38:18 +02:00
|
|
|
next_tb = 0; /* force lookup of first TB */
|
2003-06-24 15:22:59 +02:00
|
|
|
for(;;) {
|
2003-06-30 15:12:32 +02:00
|
|
|
interrupt_request = env->interrupt_request;
|
2008-11-06 19:54:46 +01:00
|
|
|
if (unlikely(interrupt_request)) {
|
|
|
|
if (unlikely(env->singlestep_enabled & SSTEP_NOIRQ)) {
|
|
|
|
/* Mask out external interrupts for this step. */
|
2011-05-04 22:34:25 +02:00
|
|
|
interrupt_request &= ~CPU_INTERRUPT_SSTEP_MASK;
|
2008-11-06 19:54:46 +01:00
|
|
|
}
|
2007-03-17 00:58:11 +01:00
|
|
|
if (interrupt_request & CPU_INTERRUPT_DEBUG) {
|
|
|
|
env->interrupt_request &= ~CPU_INTERRUPT_DEBUG;
|
|
|
|
env->exception_index = EXCP_DEBUG;
|
2011-05-14 14:52:35 +02:00
|
|
|
cpu_loop_exit(env);
|
2007-03-17 00:58:11 +01:00
|
|
|
}
|
2007-05-01 03:28:01 +02:00
|
|
|
#if defined(TARGET_ARM) || defined(TARGET_SPARC) || defined(TARGET_MIPS) || \
|
2009-05-20 21:31:33 +02:00
|
|
|
defined(TARGET_PPC) || defined(TARGET_ALPHA) || defined(TARGET_CRIS) || \
|
2011-04-12 10:27:03 +02:00
|
|
|
defined(TARGET_MICROBLAZE) || defined(TARGET_LM32) || defined(TARGET_UNICORE32)
|
2007-05-01 03:28:01 +02:00
|
|
|
if (interrupt_request & CPU_INTERRUPT_HALT) {
|
|
|
|
env->interrupt_request &= ~CPU_INTERRUPT_HALT;
|
|
|
|
env->halted = 1;
|
|
|
|
env->exception_index = EXCP_HLT;
|
2011-05-14 14:52:35 +02:00
|
|
|
cpu_loop_exit(env);
|
2007-05-01 03:28:01 +02:00
|
|
|
}
|
|
|
|
#endif
|
2003-06-30 15:12:32 +02:00
|
|
|
#if defined(TARGET_I386)
|
2009-06-17 22:26:59 +02:00
|
|
|
if (interrupt_request & CPU_INTERRUPT_INIT) {
|
2011-05-16 21:38:48 +02:00
|
|
|
svm_check_intercept(env, SVM_EXIT_INIT);
|
2012-05-05 01:14:41 +02:00
|
|
|
do_cpu_init(x86_env_get_cpu(env));
|
2009-06-17 22:26:59 +02:00
|
|
|
env->exception_index = EXCP_HALTED;
|
2011-05-14 14:52:35 +02:00
|
|
|
cpu_loop_exit(env);
|
2009-06-17 22:26:59 +02:00
|
|
|
} else if (interrupt_request & CPU_INTERRUPT_SIPI) {
|
2012-05-05 01:14:41 +02:00
|
|
|
do_cpu_sipi(x86_env_get_cpu(env));
|
2009-06-17 22:26:59 +02:00
|
|
|
} else if (env->hflags2 & HF2_GIF_MASK) {
|
2008-06-04 19:02:19 +02:00
|
|
|
if ((interrupt_request & CPU_INTERRUPT_SMI) &&
|
|
|
|
!(env->hflags & HF_SMM_MASK)) {
|
2011-05-16 21:38:48 +02:00
|
|
|
svm_check_intercept(env, SVM_EXIT_SMI);
|
2008-06-04 19:02:19 +02:00
|
|
|
env->interrupt_request &= ~CPU_INTERRUPT_SMI;
|
2011-05-16 21:38:48 +02:00
|
|
|
do_smm_enter(env);
|
2008-06-04 19:02:19 +02:00
|
|
|
next_tb = 0;
|
|
|
|
} else if ((interrupt_request & CPU_INTERRUPT_NMI) &&
|
|
|
|
!(env->hflags2 & HF2_NMI_MASK)) {
|
|
|
|
env->interrupt_request &= ~CPU_INTERRUPT_NMI;
|
|
|
|
env->hflags2 |= HF2_NMI_MASK;
|
2011-05-16 21:38:48 +02:00
|
|
|
do_interrupt_x86_hardirq(env, EXCP02_NMI, 1);
|
2008-06-04 19:02:19 +02:00
|
|
|
next_tb = 0;
|
2012-02-06 07:02:55 +01:00
|
|
|
} else if (interrupt_request & CPU_INTERRUPT_MCE) {
|
2009-06-23 04:05:14 +02:00
|
|
|
env->interrupt_request &= ~CPU_INTERRUPT_MCE;
|
2011-05-16 21:38:48 +02:00
|
|
|
do_interrupt_x86_hardirq(env, EXCP12_MCHK, 0);
|
2009-06-23 04:05:14 +02:00
|
|
|
next_tb = 0;
|
2008-06-04 19:02:19 +02:00
|
|
|
} else if ((interrupt_request & CPU_INTERRUPT_HARD) &&
|
|
|
|
(((env->hflags2 & HF2_VINTR_MASK) &&
|
|
|
|
(env->hflags2 & HF2_HIF_MASK)) ||
|
|
|
|
(!(env->hflags2 & HF2_VINTR_MASK) &&
|
|
|
|
(env->eflags & IF_MASK &&
|
|
|
|
!(env->hflags & HF_INHIBIT_IRQ_MASK))))) {
|
|
|
|
int intno;
|
2011-05-16 21:38:48 +02:00
|
|
|
svm_check_intercept(env, SVM_EXIT_INTR);
|
2008-06-04 19:02:19 +02:00
|
|
|
env->interrupt_request &= ~(CPU_INTERRUPT_HARD | CPU_INTERRUPT_VIRQ);
|
|
|
|
intno = cpu_get_pic_interrupt(env);
|
2009-01-15 23:34:14 +01:00
|
|
|
qemu_log_mask(CPU_LOG_TB_IN_ASM, "Servicing hardware INT=0x%02x\n", intno);
|
2011-05-16 21:38:48 +02:00
|
|
|
do_interrupt_x86_hardirq(env, intno, 1);
|
2008-06-04 19:02:19 +02:00
|
|
|
/* ensure that no TB jump will be modified as
|
|
|
|
the program flow was changed */
|
|
|
|
next_tb = 0;
|
2007-09-23 17:28:04 +02:00
|
|
|
#if !defined(CONFIG_USER_ONLY)
|
2008-06-04 19:02:19 +02:00
|
|
|
} else if ((interrupt_request & CPU_INTERRUPT_VIRQ) &&
|
|
|
|
(env->eflags & IF_MASK) &&
|
|
|
|
!(env->hflags & HF_INHIBIT_IRQ_MASK)) {
|
|
|
|
int intno;
|
|
|
|
/* FIXME: this should respect TPR */
|
2011-05-16 21:38:48 +02:00
|
|
|
svm_check_intercept(env, SVM_EXIT_VINTR);
|
2008-06-04 19:02:19 +02:00
|
|
|
intno = ldl_phys(env->vm_vmcb + offsetof(struct vmcb, control.int_vector));
|
2009-01-15 23:34:14 +01:00
|
|
|
qemu_log_mask(CPU_LOG_TB_IN_ASM, "Servicing virtual hardware INT=0x%02x\n", intno);
|
2011-05-16 21:38:48 +02:00
|
|
|
do_interrupt_x86_hardirq(env, intno, 1);
|
2008-12-13 13:33:02 +01:00
|
|
|
env->interrupt_request &= ~CPU_INTERRUPT_VIRQ;
|
2008-06-04 19:02:19 +02:00
|
|
|
next_tb = 0;
|
2003-07-01 01:18:22 +02:00
|
|
|
#endif
|
2008-06-04 19:02:19 +02:00
|
|
|
}
|
2003-06-30 15:12:32 +02:00
|
|
|
}
|
2004-01-05 00:53:18 +01:00
|
|
|
#elif defined(TARGET_PPC)
|
2004-05-21 14:59:32 +02:00
|
|
|
if ((interrupt_request & CPU_INTERRUPT_RESET)) {
|
2012-05-04 19:39:23 +02:00
|
|
|
cpu_reset(cpu);
|
2004-05-21 14:59:32 +02:00
|
|
|
}
|
2007-03-30 11:38:04 +02:00
|
|
|
if (interrupt_request & CPU_INTERRUPT_HARD) {
|
2007-04-10 00:45:36 +02:00
|
|
|
ppc_hw_interrupt(env);
|
|
|
|
if (env->pending_interrupts == 0)
|
|
|
|
env->interrupt_request &= ~CPU_INTERRUPT_HARD;
|
2008-05-04 08:38:18 +02:00
|
|
|
next_tb = 0;
|
2004-01-05 00:53:18 +01:00
|
|
|
}
|
2011-02-17 23:45:02 +01:00
|
|
|
#elif defined(TARGET_LM32)
|
|
|
|
if ((interrupt_request & CPU_INTERRUPT_HARD)
|
|
|
|
&& (env->ie & IE_IE)) {
|
|
|
|
env->exception_index = EXCP_IRQ;
|
|
|
|
do_interrupt(env);
|
|
|
|
next_tb = 0;
|
|
|
|
}
|
2009-05-20 21:31:33 +02:00
|
|
|
#elif defined(TARGET_MICROBLAZE)
|
|
|
|
if ((interrupt_request & CPU_INTERRUPT_HARD)
|
|
|
|
&& (env->sregs[SR_MSR] & MSR_IE)
|
|
|
|
&& !(env->sregs[SR_MSR] & (MSR_EIP | MSR_BIP))
|
|
|
|
&& !(env->iflags & (D_FLAG | IMM_FLAG))) {
|
|
|
|
env->exception_index = EXCP_IRQ;
|
|
|
|
do_interrupt(env);
|
|
|
|
next_tb = 0;
|
|
|
|
}
|
2005-07-02 16:58:51 +02:00
|
|
|
#elif defined(TARGET_MIPS)
|
|
|
|
if ((interrupt_request & CPU_INTERRUPT_HARD) &&
|
2010-12-25 22:56:32 +01:00
|
|
|
cpu_mips_hw_interrupts_pending(env)) {
|
2005-07-02 16:58:51 +02:00
|
|
|
/* Raise it */
|
|
|
|
env->exception_index = EXCP_EXT_INTERRUPT;
|
|
|
|
env->error_code = 0;
|
|
|
|
do_interrupt(env);
|
2008-05-04 08:38:18 +02:00
|
|
|
next_tb = 0;
|
2005-07-02 16:58:51 +02:00
|
|
|
}
|
2004-10-01 00:22:08 +02:00
|
|
|
#elif defined(TARGET_SPARC)
|
2010-01-07 21:28:31 +01:00
|
|
|
if (interrupt_request & CPU_INTERRUPT_HARD) {
|
|
|
|
if (cpu_interrupts_enabled(env) &&
|
|
|
|
env->interrupt_index > 0) {
|
|
|
|
int pil = env->interrupt_index & 0xf;
|
|
|
|
int type = env->interrupt_index & 0xf0;
|
|
|
|
|
|
|
|
if (((type == TT_EXTINT) &&
|
|
|
|
cpu_pil_allowed(env, pil)) ||
|
|
|
|
type != TT_EXTINT) {
|
|
|
|
env->exception_index = env->interrupt_index;
|
|
|
|
do_interrupt(env);
|
|
|
|
next_tb = 0;
|
|
|
|
}
|
|
|
|
}
|
2012-02-06 07:02:55 +01:00
|
|
|
}
|
2005-11-26 11:38:39 +01:00
|
|
|
#elif defined(TARGET_ARM)
|
|
|
|
if (interrupt_request & CPU_INTERRUPT_FIQ
|
|
|
|
&& !(env->uncached_cpsr & CPSR_F)) {
|
|
|
|
env->exception_index = EXCP_FIQ;
|
|
|
|
do_interrupt(env);
|
2008-05-04 08:38:18 +02:00
|
|
|
next_tb = 0;
|
2005-11-26 11:38:39 +01:00
|
|
|
}
|
2007-11-11 01:04:49 +01:00
|
|
|
/* ARMv7-M interrupt return works by loading a magic value
|
|
|
|
into the PC. On real hardware the load causes the
|
|
|
|
return to occur. The qemu implementation performs the
|
|
|
|
jump normally, then does the exception return when the
|
|
|
|
CPU tries to execute code at the magic address.
|
|
|
|
This will cause the magic PC value to be pushed to
|
2011-04-28 17:20:38 +02:00
|
|
|
the stack if an interrupt occurred at the wrong time.
|
2007-11-11 01:04:49 +01:00
|
|
|
We avoid this by disabling interrupts when
|
|
|
|
pc contains a magic address. */
|
2005-11-26 11:38:39 +01:00
|
|
|
if (interrupt_request & CPU_INTERRUPT_HARD
|
2007-11-11 01:04:49 +01:00
|
|
|
&& ((IS_M(env) && env->regs[15] < 0xfffffff0)
|
|
|
|
|| !(env->uncached_cpsr & CPSR_I))) {
|
2005-11-26 11:38:39 +01:00
|
|
|
env->exception_index = EXCP_IRQ;
|
|
|
|
do_interrupt(env);
|
2008-05-04 08:38:18 +02:00
|
|
|
next_tb = 0;
|
2005-11-26 11:38:39 +01:00
|
|
|
}
|
2011-04-12 10:27:03 +02:00
|
|
|
#elif defined(TARGET_UNICORE32)
|
|
|
|
if (interrupt_request & CPU_INTERRUPT_HARD
|
|
|
|
&& !(env->uncached_asr & ASR_I)) {
|
|
|
|
do_interrupt(env);
|
|
|
|
next_tb = 0;
|
|
|
|
}
|
2006-04-27 23:07:38 +02:00
|
|
|
#elif defined(TARGET_SH4)
|
2007-12-02 07:18:24 +01:00
|
|
|
if (interrupt_request & CPU_INTERRUPT_HARD) {
|
|
|
|
do_interrupt(env);
|
2008-05-04 08:38:18 +02:00
|
|
|
next_tb = 0;
|
2007-12-02 07:18:24 +01:00
|
|
|
}
|
2007-04-05 09:22:49 +02:00
|
|
|
#elif defined(TARGET_ALPHA)
|
2011-04-19 00:09:09 +02:00
|
|
|
{
|
|
|
|
int idx = -1;
|
|
|
|
/* ??? This hard-codes the OSF/1 interrupt levels. */
|
2012-02-06 07:02:55 +01:00
|
|
|
switch (env->pal_mode ? 7 : env->ps & PS_INT_MASK) {
|
2011-04-19 00:09:09 +02:00
|
|
|
case 0 ... 3:
|
|
|
|
if (interrupt_request & CPU_INTERRUPT_HARD) {
|
|
|
|
idx = EXCP_DEV_INTERRUPT;
|
|
|
|
}
|
|
|
|
/* FALLTHRU */
|
|
|
|
case 4:
|
|
|
|
if (interrupt_request & CPU_INTERRUPT_TIMER) {
|
|
|
|
idx = EXCP_CLK_INTERRUPT;
|
|
|
|
}
|
|
|
|
/* FALLTHRU */
|
|
|
|
case 5:
|
|
|
|
if (interrupt_request & CPU_INTERRUPT_SMP) {
|
|
|
|
idx = EXCP_SMP_INTERRUPT;
|
|
|
|
}
|
|
|
|
/* FALLTHRU */
|
|
|
|
case 6:
|
|
|
|
if (interrupt_request & CPU_INTERRUPT_MCHK) {
|
|
|
|
idx = EXCP_MCHK;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (idx >= 0) {
|
|
|
|
env->exception_index = idx;
|
|
|
|
env->error_code = 0;
|
|
|
|
do_interrupt(env);
|
|
|
|
next_tb = 0;
|
|
|
|
}
|
2007-04-05 09:22:49 +02:00
|
|
|
}
|
2007-10-08 15:16:14 +02:00
|
|
|
#elif defined(TARGET_CRIS)
|
2008-06-10 01:18:06 +02:00
|
|
|
if (interrupt_request & CPU_INTERRUPT_HARD
|
2010-02-15 11:17:33 +01:00
|
|
|
&& (env->pregs[PR_CCS] & I_FLAG)
|
|
|
|
&& !env->locked_irq) {
|
2008-06-10 01:18:06 +02:00
|
|
|
env->exception_index = EXCP_IRQ;
|
|
|
|
do_interrupt(env);
|
|
|
|
next_tb = 0;
|
|
|
|
}
|
|
|
|
if (interrupt_request & CPU_INTERRUPT_NMI
|
|
|
|
&& (env->pregs[PR_CCS] & M_FLAG)) {
|
|
|
|
env->exception_index = EXCP_NMI;
|
2007-10-08 15:16:14 +02:00
|
|
|
do_interrupt(env);
|
2008-05-04 08:38:18 +02:00
|
|
|
next_tb = 0;
|
2007-10-08 15:16:14 +02:00
|
|
|
}
|
2007-05-23 21:58:11 +02:00
|
|
|
#elif defined(TARGET_M68K)
|
|
|
|
if (interrupt_request & CPU_INTERRUPT_HARD
|
|
|
|
&& ((env->sr & SR_I) >> SR_I_SHIFT)
|
|
|
|
< env->pending_level) {
|
|
|
|
/* Real hardware gets the interrupt vector via an
|
|
|
|
IACK cycle at this point. Current emulated
|
|
|
|
hardware doesn't rely on this, so we
|
|
|
|
provide/save the vector when the interrupt is
|
|
|
|
first signalled. */
|
|
|
|
env->exception_index = env->pending_vector;
|
2011-05-21 09:55:24 +02:00
|
|
|
do_interrupt_m68k_hardirq(env);
|
2008-05-04 08:38:18 +02:00
|
|
|
next_tb = 0;
|
2007-05-23 21:58:11 +02:00
|
|
|
}
|
2011-04-15 17:32:48 +02:00
|
|
|
#elif defined(TARGET_S390X) && !defined(CONFIG_USER_ONLY)
|
|
|
|
if ((interrupt_request & CPU_INTERRUPT_HARD) &&
|
|
|
|
(env->psw.mask & PSW_MASK_EXT)) {
|
|
|
|
do_interrupt(env);
|
|
|
|
next_tb = 0;
|
|
|
|
}
|
2011-09-06 01:55:41 +02:00
|
|
|
#elif defined(TARGET_XTENSA)
|
|
|
|
if (interrupt_request & CPU_INTERRUPT_HARD) {
|
|
|
|
env->exception_index = EXC_IRQ;
|
|
|
|
do_interrupt(env);
|
|
|
|
next_tb = 0;
|
|
|
|
}
|
2003-06-30 15:12:32 +02:00
|
|
|
#endif
|
2011-04-28 17:20:35 +02:00
|
|
|
/* Don't use the cached interrupt_request value,
|
2006-05-23 00:03:52 +02:00
|
|
|
do_interrupt may have updated the EXITTB flag. */
|
2005-11-26 11:38:39 +01:00
|
|
|
if (env->interrupt_request & CPU_INTERRUPT_EXITTB) {
|
2004-02-16 22:58:54 +01:00
|
|
|
env->interrupt_request &= ~CPU_INTERRUPT_EXITTB;
|
|
|
|
/* ensure that no TB jump will be modified as
|
|
|
|
the program flow was changed */
|
2008-05-04 08:38:18 +02:00
|
|
|
next_tb = 0;
|
2004-02-16 22:58:54 +01:00
|
|
|
}
|
2009-03-06 22:48:00 +01:00
|
|
|
}
|
|
|
|
if (unlikely(env->exit_request)) {
|
|
|
|
env->exit_request = 0;
|
|
|
|
env->exception_index = EXCP_INTERRUPT;
|
2011-05-14 14:52:35 +02:00
|
|
|
cpu_loop_exit(env);
|
2003-06-24 15:22:59 +02:00
|
|
|
}
|
2010-04-29 01:07:57 +02:00
|
|
|
#if defined(DEBUG_DISAS) || defined(CONFIG_DEBUG_EXEC)
|
2009-01-15 23:36:53 +01:00
|
|
|
if (qemu_loglevel_mask(CPU_LOG_TB_CPU)) {
|
2003-06-24 15:22:59 +02:00
|
|
|
/* restore flags in standard format */
|
2007-06-03 20:45:53 +02:00
|
|
|
#if defined(TARGET_I386)
|
2011-05-16 21:38:48 +02:00
|
|
|
env->eflags = env->eflags | cpu_cc_compute_all(env, CC_OP)
|
|
|
|
| (DF & DF_MASK);
|
2009-01-15 23:34:14 +01:00
|
|
|
log_cpu_state(env, X86_DUMP_CCOP);
|
2003-06-24 15:22:59 +02:00
|
|
|
env->eflags &= ~(DF_MASK | CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
|
2006-10-22 02:18:54 +02:00
|
|
|
#elif defined(TARGET_M68K)
|
|
|
|
cpu_m68k_flush_flags(env, env->cc_op);
|
|
|
|
env->cc_op = CC_OP_FLAGS;
|
|
|
|
env->sr = (env->sr & 0xffe0)
|
|
|
|
| env->cc_dest | (env->cc_x << 4);
|
2009-01-15 23:34:14 +01:00
|
|
|
log_cpu_state(env, 0);
|
2003-06-15 21:51:39 +02:00
|
|
|
#else
|
2010-04-29 01:07:57 +02:00
|
|
|
log_cpu_state(env, 0);
|
2003-06-15 21:51:39 +02:00
|
|
|
#endif
|
2003-06-24 15:22:59 +02:00
|
|
|
}
|
2010-04-29 01:07:57 +02:00
|
|
|
#endif /* DEBUG_DISAS || CONFIG_DEBUG_EXEC */
|
2008-06-07 22:50:51 +02:00
|
|
|
spin_lock(&tb_lock);
|
2011-05-15 18:03:25 +02:00
|
|
|
tb = tb_find_fast(env);
|
2008-06-07 22:50:51 +02:00
|
|
|
/* Note: we do it here to avoid a gcc bug on Mac OS X when
|
|
|
|
doing it in tb_find_slow */
|
|
|
|
if (tb_invalidated_flag) {
|
|
|
|
/* as some TB could have been invalidated because
|
|
|
|
of memory exceptions while generating the code, we
|
|
|
|
must recompute the hash index here */
|
|
|
|
next_tb = 0;
|
2008-06-29 03:03:05 +02:00
|
|
|
tb_invalidated_flag = 0;
|
2008-06-07 22:50:51 +02:00
|
|
|
}
|
2009-07-27 16:13:05 +02:00
|
|
|
#ifdef CONFIG_DEBUG_EXEC
|
2012-04-12 15:44:24 +02:00
|
|
|
qemu_log_mask(CPU_LOG_EXEC, "Trace %p [" TARGET_FMT_lx "] %s\n",
|
|
|
|
tb->tc_ptr, tb->pc,
|
2009-01-15 23:34:14 +01:00
|
|
|
lookup_symbol(tb->pc));
|
2003-05-10 15:13:54 +02:00
|
|
|
#endif
|
2005-11-20 11:35:40 +01:00
|
|
|
/* see if we can patch the calling TB. When the TB
|
|
|
|
spans two pages, we cannot safely do a direct
|
|
|
|
jump. */
|
2010-01-15 08:56:36 +01:00
|
|
|
if (next_tb != 0 && tb->page_addr[1] == -1) {
|
2008-05-04 08:38:18 +02:00
|
|
|
tb_add_jump((TranslationBlock *)(next_tb & ~3), next_tb & 3, tb);
|
2003-06-24 15:22:59 +02:00
|
|
|
}
|
2008-06-07 22:50:51 +02:00
|
|
|
spin_unlock(&tb_lock);
|
2008-11-04 15:18:13 +01:00
|
|
|
|
|
|
|
/* cpu_interrupt might be called while translating the
|
|
|
|
TB, but before it is linked into a potentially
|
|
|
|
infinite loop and becomes env->current_tb. Avoid
|
|
|
|
starting execution if there is a pending interrupt. */
|
2010-06-25 16:56:50 +02:00
|
|
|
env->current_tb = tb;
|
|
|
|
barrier();
|
|
|
|
if (likely(!env->exit_request)) {
|
2008-06-29 03:03:05 +02:00
|
|
|
tc_ptr = tb->tc_ptr;
|
2012-02-06 07:02:55 +01:00
|
|
|
/* execute the generated code */
|
2011-05-15 18:03:25 +02:00
|
|
|
next_tb = tcg_qemu_tb_exec(env, tc_ptr);
|
2008-06-29 03:03:05 +02:00
|
|
|
if ((next_tb & 3) == 2) {
|
2008-06-30 19:22:19 +02:00
|
|
|
/* Instruction counter expired. */
|
2008-06-29 03:03:05 +02:00
|
|
|
int insns_left;
|
2012-03-16 23:50:54 +01:00
|
|
|
tb = (TranslationBlock *)(next_tb & ~3);
|
2008-06-29 03:03:05 +02:00
|
|
|
/* Restore PC. */
|
2008-11-18 20:36:03 +01:00
|
|
|
cpu_pc_from_tb(env, tb);
|
2008-06-29 03:03:05 +02:00
|
|
|
insns_left = env->icount_decr.u32;
|
|
|
|
if (env->icount_extra && insns_left >= 0) {
|
|
|
|
/* Refill decrementer and continue execution. */
|
|
|
|
env->icount_extra += insns_left;
|
|
|
|
if (env->icount_extra > 0xffff) {
|
|
|
|
insns_left = 0xffff;
|
|
|
|
} else {
|
|
|
|
insns_left = env->icount_extra;
|
|
|
|
}
|
|
|
|
env->icount_extra -= insns_left;
|
|
|
|
env->icount_decr.u16.low = insns_left;
|
|
|
|
} else {
|
|
|
|
if (insns_left > 0) {
|
|
|
|
/* Execute remaining instructions. */
|
2011-05-15 18:03:25 +02:00
|
|
|
cpu_exec_nocache(env, insns_left, tb);
|
2008-06-29 03:03:05 +02:00
|
|
|
}
|
|
|
|
env->exception_index = EXCP_INTERRUPT;
|
|
|
|
next_tb = 0;
|
2011-05-14 14:52:35 +02:00
|
|
|
cpu_loop_exit(env);
|
2008-06-29 03:03:05 +02:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
2010-06-25 16:56:50 +02:00
|
|
|
env->current_tb = NULL;
|
2003-08-10 23:48:43 +02:00
|
|
|
/* reset soft MMU for next block (it can currently
|
|
|
|
only be set by a memory fault) */
|
2007-06-03 20:52:15 +02:00
|
|
|
} /* for(;;) */
|
2011-07-02 09:50:51 +02:00
|
|
|
} else {
|
|
|
|
/* Reload env after longjmp - the compiler may have smashed all
|
|
|
|
* local variables as longjmp is marked 'noreturn'. */
|
|
|
|
env = cpu_single_env;
|
2003-03-07 00:23:54 +01:00
|
|
|
}
|
2003-06-24 15:22:59 +02:00
|
|
|
} /* for(;;) */
|
|
|
|
|
2003-03-07 00:23:54 +01:00
|
|
|
|
2003-06-15 21:51:39 +02:00
|
|
|
#if defined(TARGET_I386)
|
2003-03-23 17:49:39 +01:00
|
|
|
/* restore flags in standard format */
|
2011-05-16 21:38:48 +02:00
|
|
|
env->eflags = env->eflags | cpu_cc_compute_all(env, CC_OP)
|
|
|
|
| (DF & DF_MASK);
|
2003-06-15 21:51:39 +02:00
|
|
|
#elif defined(TARGET_ARM)
|
2005-02-22 20:27:29 +01:00
|
|
|
/* XXX: Save/restore host fpu exception state?. */
|
2011-04-12 10:27:03 +02:00
|
|
|
#elif defined(TARGET_UNICORE32)
|
2003-09-30 22:57:29 +02:00
|
|
|
#elif defined(TARGET_SPARC)
|
2003-11-23 18:05:30 +01:00
|
|
|
#elif defined(TARGET_PPC)
|
2011-02-17 23:45:02 +01:00
|
|
|
#elif defined(TARGET_LM32)
|
2006-10-22 02:18:54 +02:00
|
|
|
#elif defined(TARGET_M68K)
|
|
|
|
cpu_m68k_flush_flags(env, env->cc_op);
|
|
|
|
env->cc_op = CC_OP_FLAGS;
|
|
|
|
env->sr = (env->sr & 0xffe0)
|
|
|
|
| env->cc_dest | (env->cc_x << 4);
|
2009-05-20 21:31:33 +02:00
|
|
|
#elif defined(TARGET_MICROBLAZE)
|
2005-07-02 16:58:51 +02:00
|
|
|
#elif defined(TARGET_MIPS)
|
2006-04-27 23:07:38 +02:00
|
|
|
#elif defined(TARGET_SH4)
|
2007-04-05 09:22:49 +02:00
|
|
|
#elif defined(TARGET_ALPHA)
|
2007-10-08 15:16:14 +02:00
|
|
|
#elif defined(TARGET_CRIS)
|
2009-12-05 12:44:21 +01:00
|
|
|
#elif defined(TARGET_S390X)
|
2011-09-06 01:55:25 +02:00
|
|
|
#elif defined(TARGET_XTENSA)
|
2006-04-27 23:07:38 +02:00
|
|
|
/* XXXXX */
|
2003-06-15 21:51:39 +02:00
|
|
|
#else
|
|
|
|
#error unsupported target CPU
|
|
|
|
#endif
|
2007-02-04 14:37:44 +01:00
|
|
|
|
2005-11-22 00:25:50 +01:00
|
|
|
/* fail safe : never use cpu_single_env outside cpu_exec() */
|
2007-09-16 23:08:06 +02:00
|
|
|
cpu_single_env = NULL;
|
2003-03-07 00:23:54 +01:00
|
|
|
return ret;
|
|
|
|
}
|