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/*
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* i386 emulator main execution loop
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*
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* Copyright (c) 2003-2005 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, see <http://www.gnu.org/licenses/>.
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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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#include "tcg.h" |
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#include "kvm.h" |
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|
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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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#ifdef __linux__
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#include <sys/ucontext.h> |
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#endif
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#endif
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#if defined(__sparc__) && !defined(CONFIG_SOLARIS)
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// Work around ugly bugs in glibc that mangle global register contents
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#undef env
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#define env cpu_single_env
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#endif
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int tb_invalidated_flag;
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//#define CONFIG_DEBUG_EXEC
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//#define DEBUG_SIGNAL
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int qemu_cpu_has_work(CPUState *env)
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{ |
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return cpu_has_work(env);
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} |
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void cpu_loop_exit(void) |
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{ |
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env->current_tb = NULL;
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longjmp(env->jmp_env, 1);
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} |
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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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#ifdef __linux__
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struct ucontext *uc = puc;
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#elif defined(__OpenBSD__)
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struct sigcontext *uc = puc;
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#endif
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#endif
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env = env1; |
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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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#ifdef __linux__
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#ifdef __ia64
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sigprocmask(SIG_SETMASK, (sigset_t *)&uc->uc_sigmask, NULL);
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#else
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sigprocmask(SIG_SETMASK, &uc->uc_sigmask, NULL);
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#endif
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#elif defined(__OpenBSD__)
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sigprocmask(SIG_SETMASK, &uc->sc_mask, NULL);
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#endif
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} |
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#endif
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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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/* Execute the code without caching the generated code. An interpreter
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could be used if available. */
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static void cpu_exec_nocache(int max_cycles, TranslationBlock *orig_tb) |
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{ |
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unsigned long next_tb; |
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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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next_tb = tcg_qemu_tb_exec(tb->tc_ptr); |
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env->current_tb = NULL;
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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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cpu_pc_from_tb(env, tb); |
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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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static TranslationBlock *tb_find_slow(target_ulong pc,
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target_ulong cs_base, |
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uint64_t flags) |
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{ |
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TranslationBlock *tb, **ptb1; |
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unsigned int h; |
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tb_page_addr_t phys_pc, phys_page1, phys_page2; |
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target_ulong virt_page2; |
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tb_invalidated_flag = 0;
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/* find translated block using physical mappings */
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phys_pc = get_page_addr_code(env, pc); |
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phys_page1 = phys_pc & TARGET_PAGE_MASK; |
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phys_page2 = -1;
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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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if (tb->pc == pc &&
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tb->page_addr[0] == phys_page1 &&
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tb->cs_base == cs_base && |
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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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virt_page2 = (pc & TARGET_PAGE_MASK) + |
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TARGET_PAGE_SIZE; |
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phys_page2 = get_page_addr_code(env, virt_page2); |
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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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/* 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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found:
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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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static inline TranslationBlock *tb_find_fast(void) |
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{ |
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TranslationBlock *tb; |
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target_ulong cs_base, pc; |
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int flags;
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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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cpu_get_tb_cpu_state(env, &pc, &cs_base, &flags); |
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tb = env->tb_jmp_cache[tb_jmp_cache_hash_func(pc)]; |
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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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tb = tb_find_slow(pc, cs_base, flags); |
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} |
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return tb;
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} |
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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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static void cpu_handle_debug_exception(CPUState *env) |
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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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if (debug_excp_handler)
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debug_excp_handler(env); |
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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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volatile host_reg_t saved_env_reg;
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int ret, interrupt_request;
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TranslationBlock *tb; |
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uint8_t *tc_ptr; |
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unsigned long next_tb; |
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if (cpu_halted(env1) == EXCP_HALTED)
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return EXCP_HALTED;
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cpu_single_env = env1; |
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/* the access to env below is actually saving the global register's
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value, so that files not including target-xyz/exec.h are free to
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use it. */
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QEMU_BUILD_BUG_ON (sizeof (saved_env_reg) != sizeof (env)); |
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saved_env_reg = (host_reg_t) env; |
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asm(""); |
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env = env1; |
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#if defined(TARGET_I386)
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if (!kvm_enabled()) {
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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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} |
245 |
#elif defined(TARGET_SPARC)
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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; |
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#elif defined(TARGET_ALPHA)
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#elif defined(TARGET_ARM)
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#elif defined(TARGET_PPC)
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#elif defined(TARGET_MICROBLAZE)
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#elif defined(TARGET_MIPS)
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#elif defined(TARGET_SH4)
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#elif defined(TARGET_CRIS)
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#elif defined(TARGET_S390X)
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/* XXXXX */
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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) { |
267 |
#if defined(__sparc__) && !defined(CONFIG_SOLARIS)
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#undef env
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env = cpu_single_env; |
270 |
#define env cpu_single_env
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#endif
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/* if an exception is pending, we execute it here */
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if (env->exception_index >= 0) { |
274 |
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; |
277 |
if (ret == EXCP_DEBUG)
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cpu_handle_debug_exception(env); |
279 |
break;
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} else {
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#if defined(CONFIG_USER_ONLY)
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/* if user mode only, we simulate a fake exception
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which will be handled 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, |
287 |
env->exception_is_int, |
288 |
env->error_code, |
289 |
env->exception_next_eip); |
290 |
/* successfully delivered */
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env->old_exception = -1;
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#endif
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ret = env->exception_index; |
294 |
break;
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295 |
#else
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296 |
#if defined(TARGET_I386)
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/* simulate a real cpu exception. On i386, it can
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298 |
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, |
301 |
env->exception_is_int, |
302 |
env->error_code, |
303 |
env->exception_next_eip, 0);
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/* successfully delivered */
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env->old_exception = -1;
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306 |
#elif defined(TARGET_PPC)
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do_interrupt(env); |
308 |
#elif defined(TARGET_MICROBLAZE)
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do_interrupt(env); |
310 |
#elif defined(TARGET_MIPS)
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311 |
do_interrupt(env); |
312 |
#elif defined(TARGET_SPARC)
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313 |
do_interrupt(env); |
314 |
#elif defined(TARGET_ARM)
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315 |
do_interrupt(env); |
316 |
#elif defined(TARGET_SH4)
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317 |
do_interrupt(env); |
318 |
#elif defined(TARGET_ALPHA)
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319 |
do_interrupt(env); |
320 |
#elif defined(TARGET_CRIS)
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321 |
do_interrupt(env); |
322 |
#elif defined(TARGET_M68K)
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323 |
do_interrupt(0);
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324 |
#endif
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325 |
env->exception_index = -1;
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326 |
#endif
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327 |
} |
328 |
} |
329 |
|
330 |
if (kvm_enabled()) {
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331 |
kvm_cpu_exec(env); |
332 |
longjmp(env->jmp_env, 1);
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333 |
} |
334 |
|
335 |
next_tb = 0; /* force lookup of first TB */ |
336 |
for(;;) {
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337 |
interrupt_request = env->interrupt_request; |
338 |
if (unlikely(interrupt_request)) {
|
339 |
if (unlikely(env->singlestep_enabled & SSTEP_NOIRQ)) {
|
340 |
/* Mask out external interrupts for this step. */
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341 |
interrupt_request &= ~(CPU_INTERRUPT_HARD | |
342 |
CPU_INTERRUPT_FIQ | |
343 |
CPU_INTERRUPT_SMI | |
344 |
CPU_INTERRUPT_NMI); |
345 |
} |
346 |
if (interrupt_request & CPU_INTERRUPT_DEBUG) {
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347 |
env->interrupt_request &= ~CPU_INTERRUPT_DEBUG; |
348 |
env->exception_index = EXCP_DEBUG; |
349 |
cpu_loop_exit(); |
350 |
} |
351 |
#if defined(TARGET_ARM) || defined(TARGET_SPARC) || defined(TARGET_MIPS) || \
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352 |
defined(TARGET_PPC) || defined(TARGET_ALPHA) || defined(TARGET_CRIS) || \ |
353 |
defined(TARGET_MICROBLAZE) |
354 |
if (interrupt_request & CPU_INTERRUPT_HALT) {
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355 |
env->interrupt_request &= ~CPU_INTERRUPT_HALT; |
356 |
env->halted = 1;
|
357 |
env->exception_index = EXCP_HLT; |
358 |
cpu_loop_exit(); |
359 |
} |
360 |
#endif
|
361 |
#if defined(TARGET_I386)
|
362 |
if (interrupt_request & CPU_INTERRUPT_INIT) {
|
363 |
svm_check_intercept(SVM_EXIT_INIT); |
364 |
do_cpu_init(env); |
365 |
env->exception_index = EXCP_HALTED; |
366 |
cpu_loop_exit(); |
367 |
} else if (interrupt_request & CPU_INTERRUPT_SIPI) { |
368 |
do_cpu_sipi(env); |
369 |
} else if (env->hflags2 & HF2_GIF_MASK) { |
370 |
if ((interrupt_request & CPU_INTERRUPT_SMI) &&
|
371 |
!(env->hflags & HF_SMM_MASK)) { |
372 |
svm_check_intercept(SVM_EXIT_SMI); |
373 |
env->interrupt_request &= ~CPU_INTERRUPT_SMI; |
374 |
do_smm_enter(); |
375 |
next_tb = 0;
|
376 |
} else if ((interrupt_request & CPU_INTERRUPT_NMI) && |
377 |
!(env->hflags2 & HF2_NMI_MASK)) { |
378 |
env->interrupt_request &= ~CPU_INTERRUPT_NMI; |
379 |
env->hflags2 |= HF2_NMI_MASK; |
380 |
do_interrupt(EXCP02_NMI, 0, 0, 0, 1); |
381 |
next_tb = 0;
|
382 |
} else if (interrupt_request & CPU_INTERRUPT_MCE) { |
383 |
env->interrupt_request &= ~CPU_INTERRUPT_MCE; |
384 |
do_interrupt(EXCP12_MCHK, 0, 0, 0, 0); |
385 |
next_tb = 0;
|
386 |
} else if ((interrupt_request & CPU_INTERRUPT_HARD) && |
387 |
(((env->hflags2 & HF2_VINTR_MASK) && |
388 |
(env->hflags2 & HF2_HIF_MASK)) || |
389 |
(!(env->hflags2 & HF2_VINTR_MASK) && |
390 |
(env->eflags & IF_MASK && |
391 |
!(env->hflags & HF_INHIBIT_IRQ_MASK))))) { |
392 |
int intno;
|
393 |
svm_check_intercept(SVM_EXIT_INTR); |
394 |
env->interrupt_request &= ~(CPU_INTERRUPT_HARD | CPU_INTERRUPT_VIRQ); |
395 |
intno = cpu_get_pic_interrupt(env); |
396 |
qemu_log_mask(CPU_LOG_TB_IN_ASM, "Servicing hardware INT=0x%02x\n", intno);
|
397 |
#if defined(__sparc__) && !defined(CONFIG_SOLARIS)
|
398 |
#undef env
|
399 |
env = cpu_single_env; |
400 |
#define env cpu_single_env
|
401 |
#endif
|
402 |
do_interrupt(intno, 0, 0, 0, 1); |
403 |
/* ensure that no TB jump will be modified as
|
404 |
the program flow was changed */
|
405 |
next_tb = 0;
|
406 |
#if !defined(CONFIG_USER_ONLY)
|
407 |
} else if ((interrupt_request & CPU_INTERRUPT_VIRQ) && |
408 |
(env->eflags & IF_MASK) && |
409 |
!(env->hflags & HF_INHIBIT_IRQ_MASK)) { |
410 |
int intno;
|
411 |
/* FIXME: this should respect TPR */
|
412 |
svm_check_intercept(SVM_EXIT_VINTR); |
413 |
intno = ldl_phys(env->vm_vmcb + offsetof(struct vmcb, control.int_vector));
|
414 |
qemu_log_mask(CPU_LOG_TB_IN_ASM, "Servicing virtual hardware INT=0x%02x\n", intno);
|
415 |
do_interrupt(intno, 0, 0, 0, 1); |
416 |
env->interrupt_request &= ~CPU_INTERRUPT_VIRQ; |
417 |
next_tb = 0;
|
418 |
#endif
|
419 |
} |
420 |
} |
421 |
#elif defined(TARGET_PPC)
|
422 |
#if 0
|
423 |
if ((interrupt_request & CPU_INTERRUPT_RESET)) {
|
424 |
cpu_reset(env);
|
425 |
}
|
426 |
#endif
|
427 |
if (interrupt_request & CPU_INTERRUPT_HARD) {
|
428 |
ppc_hw_interrupt(env); |
429 |
if (env->pending_interrupts == 0) |
430 |
env->interrupt_request &= ~CPU_INTERRUPT_HARD; |
431 |
next_tb = 0;
|
432 |
} |
433 |
#elif defined(TARGET_MICROBLAZE)
|
434 |
if ((interrupt_request & CPU_INTERRUPT_HARD)
|
435 |
&& (env->sregs[SR_MSR] & MSR_IE) |
436 |
&& !(env->sregs[SR_MSR] & (MSR_EIP | MSR_BIP)) |
437 |
&& !(env->iflags & (D_FLAG | IMM_FLAG))) { |
438 |
env->exception_index = EXCP_IRQ; |
439 |
do_interrupt(env); |
440 |
next_tb = 0;
|
441 |
} |
442 |
#elif defined(TARGET_MIPS)
|
443 |
if ((interrupt_request & CPU_INTERRUPT_HARD) &&
|
444 |
(env->CP0_Status & env->CP0_Cause & CP0Ca_IP_mask) && |
445 |
(env->CP0_Status & (1 << CP0St_IE)) &&
|
446 |
!(env->CP0_Status & (1 << CP0St_EXL)) &&
|
447 |
!(env->CP0_Status & (1 << CP0St_ERL)) &&
|
448 |
!(env->hflags & MIPS_HFLAG_DM)) { |
449 |
/* Raise it */
|
450 |
env->exception_index = EXCP_EXT_INTERRUPT; |
451 |
env->error_code = 0;
|
452 |
do_interrupt(env); |
453 |
next_tb = 0;
|
454 |
} |
455 |
#elif defined(TARGET_SPARC)
|
456 |
if (interrupt_request & CPU_INTERRUPT_HARD) {
|
457 |
if (cpu_interrupts_enabled(env) &&
|
458 |
env->interrupt_index > 0) {
|
459 |
int pil = env->interrupt_index & 0xf; |
460 |
int type = env->interrupt_index & 0xf0; |
461 |
|
462 |
if (((type == TT_EXTINT) &&
|
463 |
cpu_pil_allowed(env, pil)) || |
464 |
type != TT_EXTINT) { |
465 |
env->exception_index = env->interrupt_index; |
466 |
do_interrupt(env); |
467 |
next_tb = 0;
|
468 |
} |
469 |
} |
470 |
} else if (interrupt_request & CPU_INTERRUPT_TIMER) { |
471 |
//do_interrupt(0, 0, 0, 0, 0);
|
472 |
env->interrupt_request &= ~CPU_INTERRUPT_TIMER; |
473 |
} |
474 |
#elif defined(TARGET_ARM)
|
475 |
if (interrupt_request & CPU_INTERRUPT_FIQ
|
476 |
&& !(env->uncached_cpsr & CPSR_F)) { |
477 |
env->exception_index = EXCP_FIQ; |
478 |
do_interrupt(env); |
479 |
next_tb = 0;
|
480 |
} |
481 |
/* ARMv7-M interrupt return works by loading a magic value
|
482 |
into the PC. On real hardware the load causes the
|
483 |
return to occur. The qemu implementation performs the
|
484 |
jump normally, then does the exception return when the
|
485 |
CPU tries to execute code at the magic address.
|
486 |
This will cause the magic PC value to be pushed to
|
487 |
the stack if an interrupt occured at the wrong time.
|
488 |
We avoid this by disabling interrupts when
|
489 |
pc contains a magic address. */
|
490 |
if (interrupt_request & CPU_INTERRUPT_HARD
|
491 |
&& ((IS_M(env) && env->regs[15] < 0xfffffff0) |
492 |
|| !(env->uncached_cpsr & CPSR_I))) { |
493 |
env->exception_index = EXCP_IRQ; |
494 |
do_interrupt(env); |
495 |
next_tb = 0;
|
496 |
} |
497 |
#elif defined(TARGET_SH4)
|
498 |
if (interrupt_request & CPU_INTERRUPT_HARD) {
|
499 |
do_interrupt(env); |
500 |
next_tb = 0;
|
501 |
} |
502 |
#elif defined(TARGET_ALPHA)
|
503 |
if (interrupt_request & CPU_INTERRUPT_HARD) {
|
504 |
do_interrupt(env); |
505 |
next_tb = 0;
|
506 |
} |
507 |
#elif defined(TARGET_CRIS)
|
508 |
if (interrupt_request & CPU_INTERRUPT_HARD
|
509 |
&& (env->pregs[PR_CCS] & I_FLAG) |
510 |
&& !env->locked_irq) { |
511 |
env->exception_index = EXCP_IRQ; |
512 |
do_interrupt(env); |
513 |
next_tb = 0;
|
514 |
} |
515 |
if (interrupt_request & CPU_INTERRUPT_NMI
|
516 |
&& (env->pregs[PR_CCS] & M_FLAG)) { |
517 |
env->exception_index = EXCP_NMI; |
518 |
do_interrupt(env); |
519 |
next_tb = 0;
|
520 |
} |
521 |
#elif defined(TARGET_M68K)
|
522 |
if (interrupt_request & CPU_INTERRUPT_HARD
|
523 |
&& ((env->sr & SR_I) >> SR_I_SHIFT) |
524 |
< env->pending_level) { |
525 |
/* Real hardware gets the interrupt vector via an
|
526 |
IACK cycle at this point. Current emulated
|
527 |
hardware doesn't rely on this, so we
|
528 |
provide/save the vector when the interrupt is
|
529 |
first signalled. */
|
530 |
env->exception_index = env->pending_vector; |
531 |
do_interrupt(1);
|
532 |
next_tb = 0;
|
533 |
} |
534 |
#endif
|
535 |
/* Don't use the cached interupt_request value,
|
536 |
do_interrupt may have updated the EXITTB flag. */
|
537 |
if (env->interrupt_request & CPU_INTERRUPT_EXITTB) {
|
538 |
env->interrupt_request &= ~CPU_INTERRUPT_EXITTB; |
539 |
/* ensure that no TB jump will be modified as
|
540 |
the program flow was changed */
|
541 |
next_tb = 0;
|
542 |
} |
543 |
} |
544 |
if (unlikely(env->exit_request)) {
|
545 |
env->exit_request = 0;
|
546 |
env->exception_index = EXCP_INTERRUPT; |
547 |
cpu_loop_exit(); |
548 |
} |
549 |
#ifdef CONFIG_DEBUG_EXEC
|
550 |
if (qemu_loglevel_mask(CPU_LOG_TB_CPU)) {
|
551 |
/* restore flags in standard format */
|
552 |
#if defined(TARGET_I386)
|
553 |
env->eflags = env->eflags | helper_cc_compute_all(CC_OP) | (DF & DF_MASK); |
554 |
log_cpu_state(env, X86_DUMP_CCOP); |
555 |
env->eflags &= ~(DF_MASK | CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C); |
556 |
#elif defined(TARGET_ARM)
|
557 |
log_cpu_state(env, 0);
|
558 |
#elif defined(TARGET_SPARC)
|
559 |
log_cpu_state(env, 0);
|
560 |
#elif defined(TARGET_PPC)
|
561 |
log_cpu_state(env, 0);
|
562 |
#elif defined(TARGET_M68K)
|
563 |
cpu_m68k_flush_flags(env, env->cc_op); |
564 |
env->cc_op = CC_OP_FLAGS; |
565 |
env->sr = (env->sr & 0xffe0)
|
566 |
| env->cc_dest | (env->cc_x << 4);
|
567 |
log_cpu_state(env, 0);
|
568 |
#elif defined(TARGET_MICROBLAZE)
|
569 |
log_cpu_state(env, 0);
|
570 |
#elif defined(TARGET_MIPS)
|
571 |
log_cpu_state(env, 0);
|
572 |
#elif defined(TARGET_SH4)
|
573 |
log_cpu_state(env, 0);
|
574 |
#elif defined(TARGET_ALPHA)
|
575 |
log_cpu_state(env, 0);
|
576 |
#elif defined(TARGET_CRIS)
|
577 |
log_cpu_state(env, 0);
|
578 |
#else
|
579 |
#error unsupported target CPU
|
580 |
#endif
|
581 |
} |
582 |
#endif
|
583 |
spin_lock(&tb_lock); |
584 |
tb = tb_find_fast(); |
585 |
/* Note: we do it here to avoid a gcc bug on Mac OS X when
|
586 |
doing it in tb_find_slow */
|
587 |
if (tb_invalidated_flag) {
|
588 |
/* as some TB could have been invalidated because
|
589 |
of memory exceptions while generating the code, we
|
590 |
must recompute the hash index here */
|
591 |
next_tb = 0;
|
592 |
tb_invalidated_flag = 0;
|
593 |
} |
594 |
#ifdef CONFIG_DEBUG_EXEC
|
595 |
qemu_log_mask(CPU_LOG_EXEC, "Trace 0x%08lx [" TARGET_FMT_lx "] %s\n", |
596 |
(long)tb->tc_ptr, tb->pc,
|
597 |
lookup_symbol(tb->pc)); |
598 |
#endif
|
599 |
/* see if we can patch the calling TB. When the TB
|
600 |
spans two pages, we cannot safely do a direct
|
601 |
jump. */
|
602 |
if (next_tb != 0 && tb->page_addr[1] == -1) { |
603 |
tb_add_jump((TranslationBlock *)(next_tb & ~3), next_tb & 3, tb); |
604 |
} |
605 |
spin_unlock(&tb_lock); |
606 |
|
607 |
/* cpu_interrupt might be called while translating the
|
608 |
TB, but before it is linked into a potentially
|
609 |
infinite loop and becomes env->current_tb. Avoid
|
610 |
starting execution if there is a pending interrupt. */
|
611 |
if (!unlikely (env->exit_request)) {
|
612 |
env->current_tb = tb; |
613 |
tc_ptr = tb->tc_ptr; |
614 |
/* execute the generated code */
|
615 |
#if defined(__sparc__) && !defined(CONFIG_SOLARIS)
|
616 |
#undef env
|
617 |
env = cpu_single_env; |
618 |
#define env cpu_single_env
|
619 |
#endif
|
620 |
next_tb = tcg_qemu_tb_exec(tc_ptr); |
621 |
env->current_tb = NULL;
|
622 |
if ((next_tb & 3) == 2) { |
623 |
/* Instruction counter expired. */
|
624 |
int insns_left;
|
625 |
tb = (TranslationBlock *)(long)(next_tb & ~3); |
626 |
/* Restore PC. */
|
627 |
cpu_pc_from_tb(env, tb); |
628 |
insns_left = env->icount_decr.u32; |
629 |
if (env->icount_extra && insns_left >= 0) { |
630 |
/* Refill decrementer and continue execution. */
|
631 |
env->icount_extra += insns_left; |
632 |
if (env->icount_extra > 0xffff) { |
633 |
insns_left = 0xffff;
|
634 |
} else {
|
635 |
insns_left = env->icount_extra; |
636 |
} |
637 |
env->icount_extra -= insns_left; |
638 |
env->icount_decr.u16.low = insns_left; |
639 |
} else {
|
640 |
if (insns_left > 0) { |
641 |
/* Execute remaining instructions. */
|
642 |
cpu_exec_nocache(insns_left, tb); |
643 |
} |
644 |
env->exception_index = EXCP_INTERRUPT; |
645 |
next_tb = 0;
|
646 |
cpu_loop_exit(); |
647 |
} |
648 |
} |
649 |
} |
650 |
/* reset soft MMU for next block (it can currently
|
651 |
only be set by a memory fault) */
|
652 |
} /* for(;;) */
|
653 |
} |
654 |
} /* for(;;) */
|
655 |
|
656 |
|
657 |
#if defined(TARGET_I386)
|
658 |
/* restore flags in standard format */
|
659 |
env->eflags = env->eflags | helper_cc_compute_all(CC_OP) | (DF & DF_MASK); |
660 |
#elif defined(TARGET_ARM)
|
661 |
/* XXX: Save/restore host fpu exception state?. */
|
662 |
#elif defined(TARGET_SPARC)
|
663 |
#elif defined(TARGET_PPC)
|
664 |
#elif defined(TARGET_M68K)
|
665 |
cpu_m68k_flush_flags(env, env->cc_op); |
666 |
env->cc_op = CC_OP_FLAGS; |
667 |
env->sr = (env->sr & 0xffe0)
|
668 |
| env->cc_dest | (env->cc_x << 4);
|
669 |
#elif defined(TARGET_MICROBLAZE)
|
670 |
#elif defined(TARGET_MIPS)
|
671 |
#elif defined(TARGET_SH4)
|
672 |
#elif defined(TARGET_ALPHA)
|
673 |
#elif defined(TARGET_CRIS)
|
674 |
#elif defined(TARGET_S390X)
|
675 |
/* XXXXX */
|
676 |
#else
|
677 |
#error unsupported target CPU
|
678 |
#endif
|
679 |
|
680 |
/* restore global registers */
|
681 |
asm(""); |
682 |
env = (void *) saved_env_reg;
|
683 |
|
684 |
/* fail safe : never use cpu_single_env outside cpu_exec() */
|
685 |
cpu_single_env = NULL;
|
686 |
return ret;
|
687 |
} |
688 |
|
689 |
/* must only be called from the generated code as an exception can be
|
690 |
generated */
|
691 |
void tb_invalidate_page_range(target_ulong start, target_ulong end)
|
692 |
{ |
693 |
/* XXX: cannot enable it yet because it yields to MMU exception
|
694 |
where NIP != read address on PowerPC */
|
695 |
#if 0
|
696 |
target_ulong phys_addr;
|
697 |
phys_addr = get_phys_addr_code(env, start);
|
698 |
tb_invalidate_phys_page_range(phys_addr, phys_addr + end - start, 0);
|
699 |
#endif
|
700 |
} |
701 |
|
702 |
#if defined(TARGET_I386) && defined(CONFIG_USER_ONLY)
|
703 |
|
704 |
void cpu_x86_load_seg(CPUX86State *s, int seg_reg, int selector) |
705 |
{ |
706 |
CPUX86State *saved_env; |
707 |
|
708 |
saved_env = env; |
709 |
env = s; |
710 |
if (!(env->cr[0] & CR0_PE_MASK) || (env->eflags & VM_MASK)) { |
711 |
selector &= 0xffff;
|
712 |
cpu_x86_load_seg_cache(env, seg_reg, selector, |
713 |
(selector << 4), 0xffff, 0); |
714 |
} else {
|
715 |
helper_load_seg(seg_reg, selector); |
716 |
} |
717 |
env = saved_env; |
718 |
} |
719 |
|
720 |
void cpu_x86_fsave(CPUX86State *s, target_ulong ptr, int data32) |
721 |
{ |
722 |
CPUX86State *saved_env; |
723 |
|
724 |
saved_env = env; |
725 |
env = s; |
726 |
|
727 |
helper_fsave(ptr, data32); |
728 |
|
729 |
env = saved_env; |
730 |
} |
731 |
|
732 |
void cpu_x86_frstor(CPUX86State *s, target_ulong ptr, int data32) |
733 |
{ |
734 |
CPUX86State *saved_env; |
735 |
|
736 |
saved_env = env; |
737 |
env = s; |
738 |
|
739 |
helper_frstor(ptr, data32); |
740 |
|
741 |
env = saved_env; |
742 |
} |
743 |
|
744 |
#endif /* TARGET_I386 */ |
745 |
|
746 |
#if !defined(CONFIG_SOFTMMU)
|
747 |
|
748 |
#if defined(TARGET_I386)
|
749 |
#define EXCEPTION_ACTION raise_exception_err(env->exception_index, env->error_code)
|
750 |
#else
|
751 |
#define EXCEPTION_ACTION cpu_loop_exit()
|
752 |
#endif
|
753 |
|
754 |
/* 'pc' is the host PC at which the exception was raised. 'address' is
|
755 |
the effective address of the memory exception. 'is_write' is 1 if a
|
756 |
write caused the exception and otherwise 0'. 'old_set' is the
|
757 |
signal set which should be restored */
|
758 |
static inline int handle_cpu_signal(unsigned long pc, unsigned long address, |
759 |
int is_write, sigset_t *old_set,
|
760 |
void *puc)
|
761 |
{ |
762 |
TranslationBlock *tb; |
763 |
int ret;
|
764 |
|
765 |
if (cpu_single_env)
|
766 |
env = cpu_single_env; /* XXX: find a correct solution for multithread */
|
767 |
#if defined(DEBUG_SIGNAL)
|
768 |
qemu_printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
|
769 |
pc, address, is_write, *(unsigned long *)old_set); |
770 |
#endif
|
771 |
/* XXX: locking issue */
|
772 |
if (is_write && page_unprotect(h2g(address), pc, puc)) {
|
773 |
return 1; |
774 |
} |
775 |
|
776 |
/* see if it is an MMU fault */
|
777 |
ret = cpu_handle_mmu_fault(env, address, is_write, MMU_USER_IDX, 0);
|
778 |
if (ret < 0) |
779 |
return 0; /* not an MMU fault */ |
780 |
if (ret == 0) |
781 |
return 1; /* the MMU fault was handled without causing real CPU fault */ |
782 |
/* now we have a real cpu fault */
|
783 |
tb = tb_find_pc(pc); |
784 |
if (tb) {
|
785 |
/* the PC is inside the translated code. It means that we have
|
786 |
a virtual CPU fault */
|
787 |
cpu_restore_state(tb, env, pc, puc); |
788 |
} |
789 |
|
790 |
/* we restore the process signal mask as the sigreturn should
|
791 |
do it (XXX: use sigsetjmp) */
|
792 |
sigprocmask(SIG_SETMASK, old_set, NULL);
|
793 |
EXCEPTION_ACTION; |
794 |
|
795 |
/* never comes here */
|
796 |
return 1; |
797 |
} |
798 |
|
799 |
#if defined(__i386__)
|
800 |
|
801 |
#if defined(__APPLE__)
|
802 |
# include <sys/ucontext.h> |
803 |
|
804 |
# define EIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->ss.eip)) |
805 |
# define TRAP_sig(context) ((context)->uc_mcontext->es.trapno)
|
806 |
# define ERROR_sig(context) ((context)->uc_mcontext->es.err)
|
807 |
# define MASK_sig(context) ((context)->uc_sigmask)
|
808 |
#elif defined (__NetBSD__)
|
809 |
# include <ucontext.h> |
810 |
|
811 |
# define EIP_sig(context) ((context)->uc_mcontext.__gregs[_REG_EIP])
|
812 |
# define TRAP_sig(context) ((context)->uc_mcontext.__gregs[_REG_TRAPNO])
|
813 |
# define ERROR_sig(context) ((context)->uc_mcontext.__gregs[_REG_ERR])
|
814 |
# define MASK_sig(context) ((context)->uc_sigmask)
|
815 |
#elif defined (__FreeBSD__) || defined(__DragonFly__)
|
816 |
# include <ucontext.h> |
817 |
|
818 |
# define EIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext.mc_eip)) |
819 |
# define TRAP_sig(context) ((context)->uc_mcontext.mc_trapno)
|
820 |
# define ERROR_sig(context) ((context)->uc_mcontext.mc_err)
|
821 |
# define MASK_sig(context) ((context)->uc_sigmask)
|
822 |
#elif defined(__OpenBSD__)
|
823 |
# define EIP_sig(context) ((context)->sc_eip)
|
824 |
# define TRAP_sig(context) ((context)->sc_trapno)
|
825 |
# define ERROR_sig(context) ((context)->sc_err)
|
826 |
# define MASK_sig(context) ((context)->sc_mask)
|
827 |
#else
|
828 |
# define EIP_sig(context) ((context)->uc_mcontext.gregs[REG_EIP])
|
829 |
# define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO])
|
830 |
# define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR])
|
831 |
# define MASK_sig(context) ((context)->uc_sigmask)
|
832 |
#endif
|
833 |
|
834 |
int cpu_signal_handler(int host_signum, void *pinfo, |
835 |
void *puc)
|
836 |
{ |
837 |
siginfo_t *info = pinfo; |
838 |
#if defined(__NetBSD__) || defined (__FreeBSD__) || defined(__DragonFly__)
|
839 |
ucontext_t *uc = puc; |
840 |
#elif defined(__OpenBSD__)
|
841 |
struct sigcontext *uc = puc;
|
842 |
#else
|
843 |
struct ucontext *uc = puc;
|
844 |
#endif
|
845 |
unsigned long pc; |
846 |
int trapno;
|
847 |
|
848 |
#ifndef REG_EIP
|
849 |
/* for glibc 2.1 */
|
850 |
#define REG_EIP EIP
|
851 |
#define REG_ERR ERR
|
852 |
#define REG_TRAPNO TRAPNO
|
853 |
#endif
|
854 |
pc = EIP_sig(uc); |
855 |
trapno = TRAP_sig(uc); |
856 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
857 |
trapno == 0xe ?
|
858 |
(ERROR_sig(uc) >> 1) & 1 : 0, |
859 |
&MASK_sig(uc), puc); |
860 |
} |
861 |
|
862 |
#elif defined(__x86_64__)
|
863 |
|
864 |
#ifdef __NetBSD__
|
865 |
#define PC_sig(context) _UC_MACHINE_PC(context)
|
866 |
#define TRAP_sig(context) ((context)->uc_mcontext.__gregs[_REG_TRAPNO])
|
867 |
#define ERROR_sig(context) ((context)->uc_mcontext.__gregs[_REG_ERR])
|
868 |
#define MASK_sig(context) ((context)->uc_sigmask)
|
869 |
#elif defined(__OpenBSD__)
|
870 |
#define PC_sig(context) ((context)->sc_rip)
|
871 |
#define TRAP_sig(context) ((context)->sc_trapno)
|
872 |
#define ERROR_sig(context) ((context)->sc_err)
|
873 |
#define MASK_sig(context) ((context)->sc_mask)
|
874 |
#elif defined (__FreeBSD__) || defined(__DragonFly__)
|
875 |
#include <ucontext.h> |
876 |
|
877 |
#define PC_sig(context) (*((unsigned long*)&(context)->uc_mcontext.mc_rip)) |
878 |
#define TRAP_sig(context) ((context)->uc_mcontext.mc_trapno)
|
879 |
#define ERROR_sig(context) ((context)->uc_mcontext.mc_err)
|
880 |
#define MASK_sig(context) ((context)->uc_sigmask)
|
881 |
#else
|
882 |
#define PC_sig(context) ((context)->uc_mcontext.gregs[REG_RIP])
|
883 |
#define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO])
|
884 |
#define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR])
|
885 |
#define MASK_sig(context) ((context)->uc_sigmask)
|
886 |
#endif
|
887 |
|
888 |
int cpu_signal_handler(int host_signum, void *pinfo, |
889 |
void *puc)
|
890 |
{ |
891 |
siginfo_t *info = pinfo; |
892 |
unsigned long pc; |
893 |
#if defined(__NetBSD__) || defined (__FreeBSD__) || defined(__DragonFly__)
|
894 |
ucontext_t *uc = puc; |
895 |
#elif defined(__OpenBSD__)
|
896 |
struct sigcontext *uc = puc;
|
897 |
#else
|
898 |
struct ucontext *uc = puc;
|
899 |
#endif
|
900 |
|
901 |
pc = PC_sig(uc); |
902 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
903 |
TRAP_sig(uc) == 0xe ?
|
904 |
(ERROR_sig(uc) >> 1) & 1 : 0, |
905 |
&MASK_sig(uc), puc); |
906 |
} |
907 |
|
908 |
#elif defined(_ARCH_PPC)
|
909 |
|
910 |
/***********************************************************************
|
911 |
* signal context platform-specific definitions
|
912 |
* From Wine
|
913 |
*/
|
914 |
#ifdef linux
|
915 |
/* All Registers access - only for local access */
|
916 |
# define REG_sig(reg_name, context) ((context)->uc_mcontext.regs->reg_name)
|
917 |
/* Gpr Registers access */
|
918 |
# define GPR_sig(reg_num, context) REG_sig(gpr[reg_num], context)
|
919 |
# define IAR_sig(context) REG_sig(nip, context) /* Program counter */ |
920 |
# define MSR_sig(context) REG_sig(msr, context) /* Machine State Register (Supervisor) */ |
921 |
# define CTR_sig(context) REG_sig(ctr, context) /* Count register */ |
922 |
# define XER_sig(context) REG_sig(xer, context) /* User's integer exception register */ |
923 |
# define LR_sig(context) REG_sig(link, context) /* Link register */ |
924 |
# define CR_sig(context) REG_sig(ccr, context) /* Condition register */ |
925 |
/* Float Registers access */
|
926 |
# define FLOAT_sig(reg_num, context) (((double*)((char*)((context)->uc_mcontext.regs+48*4)))[reg_num]) |
927 |
# define FPSCR_sig(context) (*(int*)((char*)((context)->uc_mcontext.regs+(48+32*2)*4))) |
928 |
/* Exception Registers access */
|
929 |
# define DAR_sig(context) REG_sig(dar, context)
|
930 |
# define DSISR_sig(context) REG_sig(dsisr, context)
|
931 |
# define TRAP_sig(context) REG_sig(trap, context)
|
932 |
#endif /* linux */ |
933 |
|
934 |
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
|
935 |
#include <ucontext.h> |
936 |
# define IAR_sig(context) ((context)->uc_mcontext.mc_srr0)
|
937 |
# define MSR_sig(context) ((context)->uc_mcontext.mc_srr1)
|
938 |
# define CTR_sig(context) ((context)->uc_mcontext.mc_ctr)
|
939 |
# define XER_sig(context) ((context)->uc_mcontext.mc_xer)
|
940 |
# define LR_sig(context) ((context)->uc_mcontext.mc_lr)
|
941 |
# define CR_sig(context) ((context)->uc_mcontext.mc_cr)
|
942 |
/* Exception Registers access */
|
943 |
# define DAR_sig(context) ((context)->uc_mcontext.mc_dar)
|
944 |
# define DSISR_sig(context) ((context)->uc_mcontext.mc_dsisr)
|
945 |
# define TRAP_sig(context) ((context)->uc_mcontext.mc_exc)
|
946 |
#endif /* __FreeBSD__|| __FreeBSD_kernel__ */ |
947 |
|
948 |
#ifdef __APPLE__
|
949 |
# include <sys/ucontext.h> |
950 |
typedef struct ucontext SIGCONTEXT; |
951 |
/* All Registers access - only for local access */
|
952 |
# define REG_sig(reg_name, context) ((context)->uc_mcontext->ss.reg_name)
|
953 |
# define FLOATREG_sig(reg_name, context) ((context)->uc_mcontext->fs.reg_name)
|
954 |
# define EXCEPREG_sig(reg_name, context) ((context)->uc_mcontext->es.reg_name)
|
955 |
# define VECREG_sig(reg_name, context) ((context)->uc_mcontext->vs.reg_name)
|
956 |
/* Gpr Registers access */
|
957 |
# define GPR_sig(reg_num, context) REG_sig(r##reg_num, context) |
958 |
# define IAR_sig(context) REG_sig(srr0, context) /* Program counter */ |
959 |
# define MSR_sig(context) REG_sig(srr1, context) /* Machine State Register (Supervisor) */ |
960 |
# define CTR_sig(context) REG_sig(ctr, context)
|
961 |
# define XER_sig(context) REG_sig(xer, context) /* Link register */ |
962 |
# define LR_sig(context) REG_sig(lr, context) /* User's integer exception register */ |
963 |
# define CR_sig(context) REG_sig(cr, context) /* Condition register */ |
964 |
/* Float Registers access */
|
965 |
# define FLOAT_sig(reg_num, context) FLOATREG_sig(fpregs[reg_num], context)
|
966 |
# define FPSCR_sig(context) ((double)FLOATREG_sig(fpscr, context)) |
967 |
/* Exception Registers access */
|
968 |
# define DAR_sig(context) EXCEPREG_sig(dar, context) /* Fault registers for coredump */ |
969 |
# define DSISR_sig(context) EXCEPREG_sig(dsisr, context)
|
970 |
# define TRAP_sig(context) EXCEPREG_sig(exception, context) /* number of powerpc exception taken */ |
971 |
#endif /* __APPLE__ */ |
972 |
|
973 |
int cpu_signal_handler(int host_signum, void *pinfo, |
974 |
void *puc)
|
975 |
{ |
976 |
siginfo_t *info = pinfo; |
977 |
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
|
978 |
ucontext_t *uc = puc; |
979 |
#else
|
980 |
struct ucontext *uc = puc;
|
981 |
#endif
|
982 |
unsigned long pc; |
983 |
int is_write;
|
984 |
|
985 |
pc = IAR_sig(uc); |
986 |
is_write = 0;
|
987 |
#if 0
|
988 |
/* ppc 4xx case */
|
989 |
if (DSISR_sig(uc) & 0x00800000)
|
990 |
is_write = 1;
|
991 |
#else
|
992 |
if (TRAP_sig(uc) != 0x400 && (DSISR_sig(uc) & 0x02000000)) |
993 |
is_write = 1;
|
994 |
#endif
|
995 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
996 |
is_write, &uc->uc_sigmask, puc); |
997 |
} |
998 |
|
999 |
#elif defined(__alpha__)
|
1000 |
|
1001 |
int cpu_signal_handler(int host_signum, void *pinfo, |
1002 |
void *puc)
|
1003 |
{ |
1004 |
siginfo_t *info = pinfo; |
1005 |
struct ucontext *uc = puc;
|
1006 |
uint32_t *pc = uc->uc_mcontext.sc_pc; |
1007 |
uint32_t insn = *pc; |
1008 |
int is_write = 0; |
1009 |
|
1010 |
/* XXX: need kernel patch to get write flag faster */
|
1011 |
switch (insn >> 26) { |
1012 |
case 0x0d: // stw |
1013 |
case 0x0e: // stb |
1014 |
case 0x0f: // stq_u |
1015 |
case 0x24: // stf |
1016 |
case 0x25: // stg |
1017 |
case 0x26: // sts |
1018 |
case 0x27: // stt |
1019 |
case 0x2c: // stl |
1020 |
case 0x2d: // stq |
1021 |
case 0x2e: // stl_c |
1022 |
case 0x2f: // stq_c |
1023 |
is_write = 1;
|
1024 |
} |
1025 |
|
1026 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
1027 |
is_write, &uc->uc_sigmask, puc); |
1028 |
} |
1029 |
#elif defined(__sparc__)
|
1030 |
|
1031 |
int cpu_signal_handler(int host_signum, void *pinfo, |
1032 |
void *puc)
|
1033 |
{ |
1034 |
siginfo_t *info = pinfo; |
1035 |
int is_write;
|
1036 |
uint32_t insn; |
1037 |
#if !defined(__arch64__) || defined(CONFIG_SOLARIS)
|
1038 |
uint32_t *regs = (uint32_t *)(info + 1);
|
1039 |
void *sigmask = (regs + 20); |
1040 |
/* XXX: is there a standard glibc define ? */
|
1041 |
unsigned long pc = regs[1]; |
1042 |
#else
|
1043 |
#ifdef __linux__
|
1044 |
struct sigcontext *sc = puc;
|
1045 |
unsigned long pc = sc->sigc_regs.tpc; |
1046 |
void *sigmask = (void *)sc->sigc_mask; |
1047 |
#elif defined(__OpenBSD__)
|
1048 |
struct sigcontext *uc = puc;
|
1049 |
unsigned long pc = uc->sc_pc; |
1050 |
void *sigmask = (void *)(long)uc->sc_mask; |
1051 |
#endif
|
1052 |
#endif
|
1053 |
|
1054 |
/* XXX: need kernel patch to get write flag faster */
|
1055 |
is_write = 0;
|
1056 |
insn = *(uint32_t *)pc; |
1057 |
if ((insn >> 30) == 3) { |
1058 |
switch((insn >> 19) & 0x3f) { |
1059 |
case 0x05: // stb |
1060 |
case 0x15: // stba |
1061 |
case 0x06: // sth |
1062 |
case 0x16: // stha |
1063 |
case 0x04: // st |
1064 |
case 0x14: // sta |
1065 |
case 0x07: // std |
1066 |
case 0x17: // stda |
1067 |
case 0x0e: // stx |
1068 |
case 0x1e: // stxa |
1069 |
case 0x24: // stf |
1070 |
case 0x34: // stfa |
1071 |
case 0x27: // stdf |
1072 |
case 0x37: // stdfa |
1073 |
case 0x26: // stqf |
1074 |
case 0x36: // stqfa |
1075 |
case 0x25: // stfsr |
1076 |
case 0x3c: // casa |
1077 |
case 0x3e: // casxa |
1078 |
is_write = 1;
|
1079 |
break;
|
1080 |
} |
1081 |
} |
1082 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
1083 |
is_write, sigmask, NULL);
|
1084 |
} |
1085 |
|
1086 |
#elif defined(__arm__)
|
1087 |
|
1088 |
int cpu_signal_handler(int host_signum, void *pinfo, |
1089 |
void *puc)
|
1090 |
{ |
1091 |
siginfo_t *info = pinfo; |
1092 |
struct ucontext *uc = puc;
|
1093 |
unsigned long pc; |
1094 |
int is_write;
|
1095 |
|
1096 |
#if (__GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ <= 3)) |
1097 |
pc = uc->uc_mcontext.gregs[R15]; |
1098 |
#else
|
1099 |
pc = uc->uc_mcontext.arm_pc; |
1100 |
#endif
|
1101 |
/* XXX: compute is_write */
|
1102 |
is_write = 0;
|
1103 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
1104 |
is_write, |
1105 |
&uc->uc_sigmask, puc); |
1106 |
} |
1107 |
|
1108 |
#elif defined(__mc68000)
|
1109 |
|
1110 |
int cpu_signal_handler(int host_signum, void *pinfo, |
1111 |
void *puc)
|
1112 |
{ |
1113 |
siginfo_t *info = pinfo; |
1114 |
struct ucontext *uc = puc;
|
1115 |
unsigned long pc; |
1116 |
int is_write;
|
1117 |
|
1118 |
pc = uc->uc_mcontext.gregs[16];
|
1119 |
/* XXX: compute is_write */
|
1120 |
is_write = 0;
|
1121 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
1122 |
is_write, |
1123 |
&uc->uc_sigmask, puc); |
1124 |
} |
1125 |
|
1126 |
#elif defined(__ia64)
|
1127 |
|
1128 |
#ifndef __ISR_VALID
|
1129 |
/* This ought to be in <bits/siginfo.h>... */
|
1130 |
# define __ISR_VALID 1 |
1131 |
#endif
|
1132 |
|
1133 |
int cpu_signal_handler(int host_signum, void *pinfo, void *puc) |
1134 |
{ |
1135 |
siginfo_t *info = pinfo; |
1136 |
struct ucontext *uc = puc;
|
1137 |
unsigned long ip; |
1138 |
int is_write = 0; |
1139 |
|
1140 |
ip = uc->uc_mcontext.sc_ip; |
1141 |
switch (host_signum) {
|
1142 |
case SIGILL:
|
1143 |
case SIGFPE:
|
1144 |
case SIGSEGV:
|
1145 |
case SIGBUS:
|
1146 |
case SIGTRAP:
|
1147 |
if (info->si_code && (info->si_segvflags & __ISR_VALID))
|
1148 |
/* ISR.W (write-access) is bit 33: */
|
1149 |
is_write = (info->si_isr >> 33) & 1; |
1150 |
break;
|
1151 |
|
1152 |
default:
|
1153 |
break;
|
1154 |
} |
1155 |
return handle_cpu_signal(ip, (unsigned long)info->si_addr, |
1156 |
is_write, |
1157 |
(sigset_t *)&uc->uc_sigmask, puc); |
1158 |
} |
1159 |
|
1160 |
#elif defined(__s390__)
|
1161 |
|
1162 |
int cpu_signal_handler(int host_signum, void *pinfo, |
1163 |
void *puc)
|
1164 |
{ |
1165 |
siginfo_t *info = pinfo; |
1166 |
struct ucontext *uc = puc;
|
1167 |
unsigned long pc; |
1168 |
int is_write;
|
1169 |
|
1170 |
pc = uc->uc_mcontext.psw.addr; |
1171 |
/* XXX: compute is_write */
|
1172 |
is_write = 0;
|
1173 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
1174 |
is_write, &uc->uc_sigmask, puc); |
1175 |
} |
1176 |
|
1177 |
#elif defined(__mips__)
|
1178 |
|
1179 |
int cpu_signal_handler(int host_signum, void *pinfo, |
1180 |
void *puc)
|
1181 |
{ |
1182 |
siginfo_t *info = pinfo; |
1183 |
struct ucontext *uc = puc;
|
1184 |
greg_t pc = uc->uc_mcontext.pc; |
1185 |
int is_write;
|
1186 |
|
1187 |
/* XXX: compute is_write */
|
1188 |
is_write = 0;
|
1189 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
1190 |
is_write, &uc->uc_sigmask, puc); |
1191 |
} |
1192 |
|
1193 |
#elif defined(__hppa__)
|
1194 |
|
1195 |
int cpu_signal_handler(int host_signum, void *pinfo, |
1196 |
void *puc)
|
1197 |
{ |
1198 |
struct siginfo *info = pinfo;
|
1199 |
struct ucontext *uc = puc;
|
1200 |
unsigned long pc = uc->uc_mcontext.sc_iaoq[0]; |
1201 |
uint32_t insn = *(uint32_t *)pc; |
1202 |
int is_write = 0; |
1203 |
|
1204 |
/* XXX: need kernel patch to get write flag faster. */
|
1205 |
switch (insn >> 26) { |
1206 |
case 0x1a: /* STW */ |
1207 |
case 0x19: /* STH */ |
1208 |
case 0x18: /* STB */ |
1209 |
case 0x1b: /* STWM */ |
1210 |
is_write = 1;
|
1211 |
break;
|
1212 |
|
1213 |
case 0x09: /* CSTWX, FSTWX, FSTWS */ |
1214 |
case 0x0b: /* CSTDX, FSTDX, FSTDS */ |
1215 |
/* Distinguish from coprocessor load ... */
|
1216 |
is_write = (insn >> 9) & 1; |
1217 |
break;
|
1218 |
|
1219 |
case 0x03: |
1220 |
switch ((insn >> 6) & 15) { |
1221 |
case 0xa: /* STWS */ |
1222 |
case 0x9: /* STHS */ |
1223 |
case 0x8: /* STBS */ |
1224 |
case 0xe: /* STWAS */ |
1225 |
case 0xc: /* STBYS */ |
1226 |
is_write = 1;
|
1227 |
} |
1228 |
break;
|
1229 |
} |
1230 |
|
1231 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
1232 |
is_write, &uc->uc_sigmask, puc); |
1233 |
} |
1234 |
|
1235 |
#else
|
1236 |
|
1237 |
#error host CPU specific signal handler needed
|
1238 |
|
1239 |
#endif
|
1240 |
|
1241 |
#endif /* !defined(CONFIG_SOFTMMU) */ |