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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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#include "qemu-barrier.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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|
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int tb_invalidated_flag;
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|
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//#define CONFIG_DEBUG_EXEC
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//#define DEBUG_SIGNAL
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|
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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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} |
| 57 |
|
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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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|
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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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#if defined(CONFIG_SOFTMMU)
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void cpu_resume_from_signal(CPUState *env1, void *puc) |
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{
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env = env1; |
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|
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/* XXX: restore cpu registers saved in host registers */
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env->exception_index = -1;
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longjmp(env->jmp_env, 1);
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} |
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|
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#else
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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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#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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env = env1; |
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|
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/* XXX: restore cpu registers saved in host registers */
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|
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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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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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/* 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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/* 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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/* 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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} |
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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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/* main execution loop */
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volatile sig_atomic_t exit_request;
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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 (env1->halted) {
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if (!cpu_has_work(env1)) {
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return EXCP_HALTED;
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} |
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env1->halted = 0;
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} |
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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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barrier(); |
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env = env1; |
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|
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if (unlikely(exit_request)) {
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env->exit_request = 1;
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} |
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#if defined(TARGET_I386)
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/* put eflags in CPU temporary format */
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CC_SRC = env->eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C); |
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DF = 1 - (2 * ((env->eflags >> 10) & 1)); |
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CC_OP = CC_OP_EFLAGS; |
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env->eflags &= ~(DF_MASK | CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C); |
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#elif defined(TARGET_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_UNICORE32)
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#elif defined(TARGET_PPC)
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#elif defined(TARGET_LM32)
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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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|
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/* prepare setjmp context for exception handling */
|
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for(;;) {
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if (setjmp(env->jmp_env) == 0) { |
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#if defined(__sparc__) && !defined(CONFIG_SOLARIS)
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#undef env
|
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env = cpu_single_env; |
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#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) { |
| 304 |
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; |
| 307 |
if (ret == EXCP_DEBUG) {
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cpu_handle_debug_exception(env); |
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} |
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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
|
| 315 |
loop */
|
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#if defined(TARGET_I386)
|
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do_interrupt_user(env->exception_index, |
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env->exception_is_int, |
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env->error_code, |
| 320 |
env->exception_next_eip); |
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/* successfully delivered */
|
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env->old_exception = -1;
|
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#endif
|
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ret = env->exception_index; |
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break;
|
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#else
|
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#if defined(TARGET_I386)
|
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/* simulate a real cpu exception. On i386, it can
|
| 329 |
trigger new exceptions, but we do not handle
|
| 330 |
double or triple faults yet. */
|
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do_interrupt(env->exception_index, |
| 332 |
env->exception_is_int, |
| 333 |
env->error_code, |
| 334 |
env->exception_next_eip, 0);
|
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/* successfully delivered */
|
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env->old_exception = -1;
|
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#elif defined(TARGET_PPC)
|
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do_interrupt(env); |
| 339 |
#elif defined(TARGET_LM32)
|
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do_interrupt(env); |
| 341 |
#elif defined(TARGET_MICROBLAZE)
|
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do_interrupt(env); |
| 343 |
#elif defined(TARGET_MIPS)
|
| 344 |
do_interrupt(env); |
| 345 |
#elif defined(TARGET_SPARC)
|
| 346 |
do_interrupt(env); |
| 347 |
#elif defined(TARGET_ARM)
|
| 348 |
do_interrupt(env); |
| 349 |
#elif defined(TARGET_UNICORE32)
|
| 350 |
do_interrupt(env); |
| 351 |
#elif defined(TARGET_SH4)
|
| 352 |
do_interrupt(env); |
| 353 |
#elif defined(TARGET_ALPHA)
|
| 354 |
do_interrupt(env); |
| 355 |
#elif defined(TARGET_CRIS)
|
| 356 |
do_interrupt(env); |
| 357 |
#elif defined(TARGET_M68K)
|
| 358 |
do_interrupt(0);
|
| 359 |
#elif defined(TARGET_S390X)
|
| 360 |
do_interrupt(env); |
| 361 |
#endif
|
| 362 |
env->exception_index = -1;
|
| 363 |
#endif
|
| 364 |
} |
| 365 |
} |
| 366 |
|
| 367 |
next_tb = 0; /* force lookup of first TB */ |
| 368 |
for(;;) {
|
| 369 |
interrupt_request = env->interrupt_request; |
| 370 |
if (unlikely(interrupt_request)) {
|
| 371 |
if (unlikely(env->singlestep_enabled & SSTEP_NOIRQ)) {
|
| 372 |
/* Mask out external interrupts for this step. */
|
| 373 |
interrupt_request &= ~CPU_INTERRUPT_SSTEP_MASK; |
| 374 |
} |
| 375 |
if (interrupt_request & CPU_INTERRUPT_DEBUG) {
|
| 376 |
env->interrupt_request &= ~CPU_INTERRUPT_DEBUG; |
| 377 |
env->exception_index = EXCP_DEBUG; |
| 378 |
cpu_loop_exit(); |
| 379 |
} |
| 380 |
#if defined(TARGET_ARM) || defined(TARGET_SPARC) || defined(TARGET_MIPS) || \
|
| 381 |
defined(TARGET_PPC) || defined(TARGET_ALPHA) || defined(TARGET_CRIS) || \ |
| 382 |
defined(TARGET_MICROBLAZE) || defined(TARGET_LM32) || defined(TARGET_UNICORE32) |
| 383 |
if (interrupt_request & CPU_INTERRUPT_HALT) {
|
| 384 |
env->interrupt_request &= ~CPU_INTERRUPT_HALT; |
| 385 |
env->halted = 1;
|
| 386 |
env->exception_index = EXCP_HLT; |
| 387 |
cpu_loop_exit(); |
| 388 |
} |
| 389 |
#endif
|
| 390 |
#if defined(TARGET_I386)
|
| 391 |
if (interrupt_request & CPU_INTERRUPT_INIT) {
|
| 392 |
svm_check_intercept(SVM_EXIT_INIT); |
| 393 |
do_cpu_init(env); |
| 394 |
env->exception_index = EXCP_HALTED; |
| 395 |
cpu_loop_exit(); |
| 396 |
} else if (interrupt_request & CPU_INTERRUPT_SIPI) { |
| 397 |
do_cpu_sipi(env); |
| 398 |
} else if (env->hflags2 & HF2_GIF_MASK) { |
| 399 |
if ((interrupt_request & CPU_INTERRUPT_SMI) &&
|
| 400 |
!(env->hflags & HF_SMM_MASK)) {
|
| 401 |
svm_check_intercept(SVM_EXIT_SMI); |
| 402 |
env->interrupt_request &= ~CPU_INTERRUPT_SMI; |
| 403 |
do_smm_enter(); |
| 404 |
next_tb = 0;
|
| 405 |
} else if ((interrupt_request & CPU_INTERRUPT_NMI) && |
| 406 |
!(env->hflags2 & HF2_NMI_MASK)) {
|
| 407 |
env->interrupt_request &= ~CPU_INTERRUPT_NMI; |
| 408 |
env->hflags2 |= HF2_NMI_MASK; |
| 409 |
do_interrupt(EXCP02_NMI, 0, 0, 0, 1); |
| 410 |
next_tb = 0;
|
| 411 |
} else if (interrupt_request & CPU_INTERRUPT_MCE) { |
| 412 |
env->interrupt_request &= ~CPU_INTERRUPT_MCE; |
| 413 |
do_interrupt(EXCP12_MCHK, 0, 0, 0, 0); |
| 414 |
next_tb = 0;
|
| 415 |
} else if ((interrupt_request & CPU_INTERRUPT_HARD) && |
| 416 |
(((env->hflags2 & HF2_VINTR_MASK) && |
| 417 |
(env->hflags2 & HF2_HIF_MASK)) || |
| 418 |
(!(env->hflags2 & HF2_VINTR_MASK) && |
| 419 |
(env->eflags & IF_MASK && |
| 420 |
!(env->hflags & HF_INHIBIT_IRQ_MASK))))) {
|
| 421 |
int intno;
|
| 422 |
svm_check_intercept(SVM_EXIT_INTR); |
| 423 |
env->interrupt_request &= ~(CPU_INTERRUPT_HARD | CPU_INTERRUPT_VIRQ); |
| 424 |
intno = cpu_get_pic_interrupt(env); |
| 425 |
qemu_log_mask(CPU_LOG_TB_IN_ASM, "Servicing hardware INT=0x%02x\n", intno);
|
| 426 |
#if defined(__sparc__) && !defined(CONFIG_SOLARIS)
|
| 427 |
#undef env
|
| 428 |
env = cpu_single_env; |
| 429 |
#define env cpu_single_env
|
| 430 |
#endif
|
| 431 |
do_interrupt(intno, 0, 0, 0, 1); |
| 432 |
/* ensure that no TB jump will be modified as
|
| 433 |
the program flow was changed */
|
| 434 |
next_tb = 0;
|
| 435 |
#if !defined(CONFIG_USER_ONLY)
|
| 436 |
} else if ((interrupt_request & CPU_INTERRUPT_VIRQ) && |
| 437 |
(env->eflags & IF_MASK) && |
| 438 |
!(env->hflags & HF_INHIBIT_IRQ_MASK)) {
|
| 439 |
int intno;
|
| 440 |
/* FIXME: this should respect TPR */
|
| 441 |
svm_check_intercept(SVM_EXIT_VINTR); |
| 442 |
intno = ldl_phys(env->vm_vmcb + offsetof(struct vmcb, control.int_vector));
|
| 443 |
qemu_log_mask(CPU_LOG_TB_IN_ASM, "Servicing virtual hardware INT=0x%02x\n", intno);
|
| 444 |
do_interrupt(intno, 0, 0, 0, 1); |
| 445 |
env->interrupt_request &= ~CPU_INTERRUPT_VIRQ; |
| 446 |
next_tb = 0;
|
| 447 |
#endif
|
| 448 |
} |
| 449 |
} |
| 450 |
#elif defined(TARGET_PPC)
|
| 451 |
#if 0
|
| 452 |
if ((interrupt_request & CPU_INTERRUPT_RESET)) {
|
| 453 |
cpu_reset(env);
|
| 454 |
}
|
| 455 |
#endif
|
| 456 |
if (interrupt_request & CPU_INTERRUPT_HARD) {
|
| 457 |
ppc_hw_interrupt(env); |
| 458 |
if (env->pending_interrupts == 0) |
| 459 |
env->interrupt_request &= ~CPU_INTERRUPT_HARD; |
| 460 |
next_tb = 0;
|
| 461 |
} |
| 462 |
#elif defined(TARGET_LM32)
|
| 463 |
if ((interrupt_request & CPU_INTERRUPT_HARD)
|
| 464 |
&& (env->ie & IE_IE)) {
|
| 465 |
env->exception_index = EXCP_IRQ; |
| 466 |
do_interrupt(env); |
| 467 |
next_tb = 0;
|
| 468 |
} |
| 469 |
#elif defined(TARGET_MICROBLAZE)
|
| 470 |
if ((interrupt_request & CPU_INTERRUPT_HARD)
|
| 471 |
&& (env->sregs[SR_MSR] & MSR_IE) |
| 472 |
&& !(env->sregs[SR_MSR] & (MSR_EIP | MSR_BIP)) |
| 473 |
&& !(env->iflags & (D_FLAG | IMM_FLAG))) {
|
| 474 |
env->exception_index = EXCP_IRQ; |
| 475 |
do_interrupt(env); |
| 476 |
next_tb = 0;
|
| 477 |
} |
| 478 |
#elif defined(TARGET_MIPS)
|
| 479 |
if ((interrupt_request & CPU_INTERRUPT_HARD) &&
|
| 480 |
cpu_mips_hw_interrupts_pending(env)) {
|
| 481 |
/* Raise it */
|
| 482 |
env->exception_index = EXCP_EXT_INTERRUPT; |
| 483 |
env->error_code = 0;
|
| 484 |
do_interrupt(env); |
| 485 |
next_tb = 0;
|
| 486 |
} |
| 487 |
#elif defined(TARGET_SPARC)
|
| 488 |
if (interrupt_request & CPU_INTERRUPT_HARD) {
|
| 489 |
if (cpu_interrupts_enabled(env) &&
|
| 490 |
env->interrupt_index > 0) {
|
| 491 |
int pil = env->interrupt_index & 0xf; |
| 492 |
int type = env->interrupt_index & 0xf0; |
| 493 |
|
| 494 |
if (((type == TT_EXTINT) &&
|
| 495 |
cpu_pil_allowed(env, pil)) || |
| 496 |
type != TT_EXTINT) {
|
| 497 |
env->exception_index = env->interrupt_index; |
| 498 |
do_interrupt(env); |
| 499 |
next_tb = 0;
|
| 500 |
} |
| 501 |
} |
| 502 |
} |
| 503 |
#elif defined(TARGET_ARM)
|
| 504 |
if (interrupt_request & CPU_INTERRUPT_FIQ
|
| 505 |
&& !(env->uncached_cpsr & CPSR_F)) {
|
| 506 |
env->exception_index = EXCP_FIQ; |
| 507 |
do_interrupt(env); |
| 508 |
next_tb = 0;
|
| 509 |
} |
| 510 |
/* ARMv7-M interrupt return works by loading a magic value
|
| 511 |
into the PC. On real hardware the load causes the
|
| 512 |
return to occur. The qemu implementation performs the
|
| 513 |
jump normally, then does the exception return when the
|
| 514 |
CPU tries to execute code at the magic address.
|
| 515 |
This will cause the magic PC value to be pushed to
|
| 516 |
the stack if an interrupt occurred at the wrong time.
|
| 517 |
We avoid this by disabling interrupts when
|
| 518 |
pc contains a magic address. */
|
| 519 |
if (interrupt_request & CPU_INTERRUPT_HARD
|
| 520 |
&& ((IS_M(env) && env->regs[15] < 0xfffffff0) |
| 521 |
|| !(env->uncached_cpsr & CPSR_I))) {
|
| 522 |
env->exception_index = EXCP_IRQ; |
| 523 |
do_interrupt(env); |
| 524 |
next_tb = 0;
|
| 525 |
} |
| 526 |
#elif defined(TARGET_UNICORE32)
|
| 527 |
if (interrupt_request & CPU_INTERRUPT_HARD
|
| 528 |
&& !(env->uncached_asr & ASR_I)) {
|
| 529 |
do_interrupt(env); |
| 530 |
next_tb = 0;
|
| 531 |
} |
| 532 |
#elif defined(TARGET_SH4)
|
| 533 |
if (interrupt_request & CPU_INTERRUPT_HARD) {
|
| 534 |
do_interrupt(env); |
| 535 |
next_tb = 0;
|
| 536 |
} |
| 537 |
#elif defined(TARGET_ALPHA)
|
| 538 |
if (interrupt_request & CPU_INTERRUPT_HARD) {
|
| 539 |
do_interrupt(env); |
| 540 |
next_tb = 0;
|
| 541 |
} |
| 542 |
#elif defined(TARGET_CRIS)
|
| 543 |
if (interrupt_request & CPU_INTERRUPT_HARD
|
| 544 |
&& (env->pregs[PR_CCS] & I_FLAG) |
| 545 |
&& !env->locked_irq) {
|
| 546 |
env->exception_index = EXCP_IRQ; |
| 547 |
do_interrupt(env); |
| 548 |
next_tb = 0;
|
| 549 |
} |
| 550 |
if (interrupt_request & CPU_INTERRUPT_NMI
|
| 551 |
&& (env->pregs[PR_CCS] & M_FLAG)) {
|
| 552 |
env->exception_index = EXCP_NMI; |
| 553 |
do_interrupt(env); |
| 554 |
next_tb = 0;
|
| 555 |
} |
| 556 |
#elif defined(TARGET_M68K)
|
| 557 |
if (interrupt_request & CPU_INTERRUPT_HARD
|
| 558 |
&& ((env->sr & SR_I) >> SR_I_SHIFT) |
| 559 |
< env->pending_level) {
|
| 560 |
/* Real hardware gets the interrupt vector via an
|
| 561 |
IACK cycle at this point. Current emulated
|
| 562 |
hardware doesn't rely on this, so we
|
| 563 |
provide/save the vector when the interrupt is
|
| 564 |
first signalled. */
|
| 565 |
env->exception_index = env->pending_vector; |
| 566 |
do_interrupt(1);
|
| 567 |
next_tb = 0;
|
| 568 |
} |
| 569 |
#elif defined(TARGET_S390X) && !defined(CONFIG_USER_ONLY)
|
| 570 |
if ((interrupt_request & CPU_INTERRUPT_HARD) &&
|
| 571 |
(env->psw.mask & PSW_MASK_EXT)) {
|
| 572 |
do_interrupt(env); |
| 573 |
next_tb = 0;
|
| 574 |
} |
| 575 |
#endif
|
| 576 |
/* Don't use the cached interrupt_request value,
|
| 577 |
do_interrupt may have updated the EXITTB flag. */
|
| 578 |
if (env->interrupt_request & CPU_INTERRUPT_EXITTB) {
|
| 579 |
env->interrupt_request &= ~CPU_INTERRUPT_EXITTB; |
| 580 |
/* ensure that no TB jump will be modified as
|
| 581 |
the program flow was changed */
|
| 582 |
next_tb = 0;
|
| 583 |
} |
| 584 |
} |
| 585 |
if (unlikely(env->exit_request)) {
|
| 586 |
env->exit_request = 0;
|
| 587 |
env->exception_index = EXCP_INTERRUPT; |
| 588 |
cpu_loop_exit(); |
| 589 |
} |
| 590 |
#if defined(DEBUG_DISAS) || defined(CONFIG_DEBUG_EXEC)
|
| 591 |
if (qemu_loglevel_mask(CPU_LOG_TB_CPU)) {
|
| 592 |
/* restore flags in standard format */
|
| 593 |
#if defined(TARGET_I386)
|
| 594 |
env->eflags = env->eflags | helper_cc_compute_all(CC_OP) | (DF & DF_MASK); |
| 595 |
log_cpu_state(env, X86_DUMP_CCOP); |
| 596 |
env->eflags &= ~(DF_MASK | CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C); |
| 597 |
#elif defined(TARGET_M68K)
|
| 598 |
cpu_m68k_flush_flags(env, env->cc_op); |
| 599 |
env->cc_op = CC_OP_FLAGS; |
| 600 |
env->sr = (env->sr & 0xffe0)
|
| 601 |
| env->cc_dest | (env->cc_x << 4);
|
| 602 |
log_cpu_state(env, 0);
|
| 603 |
#else
|
| 604 |
log_cpu_state(env, 0);
|
| 605 |
#endif
|
| 606 |
} |
| 607 |
#endif /* DEBUG_DISAS || CONFIG_DEBUG_EXEC */ |
| 608 |
spin_lock(&tb_lock); |
| 609 |
tb = tb_find_fast(); |
| 610 |
/* Note: we do it here to avoid a gcc bug on Mac OS X when
|
| 611 |
doing it in tb_find_slow */
|
| 612 |
if (tb_invalidated_flag) {
|
| 613 |
/* as some TB could have been invalidated because
|
| 614 |
of memory exceptions while generating the code, we
|
| 615 |
must recompute the hash index here */
|
| 616 |
next_tb = 0;
|
| 617 |
tb_invalidated_flag = 0;
|
| 618 |
} |
| 619 |
#ifdef CONFIG_DEBUG_EXEC
|
| 620 |
qemu_log_mask(CPU_LOG_EXEC, "Trace 0x%08lx [" TARGET_FMT_lx "] %s\n", |
| 621 |
(long)tb->tc_ptr, tb->pc,
|
| 622 |
lookup_symbol(tb->pc)); |
| 623 |
#endif
|
| 624 |
/* see if we can patch the calling TB. When the TB
|
| 625 |
spans two pages, we cannot safely do a direct
|
| 626 |
jump. */
|
| 627 |
if (next_tb != 0 && tb->page_addr[1] == -1) { |
| 628 |
tb_add_jump((TranslationBlock *)(next_tb & ~3), next_tb & 3, tb); |
| 629 |
} |
| 630 |
spin_unlock(&tb_lock); |
| 631 |
|
| 632 |
/* cpu_interrupt might be called while translating the
|
| 633 |
TB, but before it is linked into a potentially
|
| 634 |
infinite loop and becomes env->current_tb. Avoid
|
| 635 |
starting execution if there is a pending interrupt. */
|
| 636 |
env->current_tb = tb; |
| 637 |
barrier(); |
| 638 |
if (likely(!env->exit_request)) {
|
| 639 |
tc_ptr = tb->tc_ptr; |
| 640 |
/* execute the generated code */
|
| 641 |
#if defined(__sparc__) && !defined(CONFIG_SOLARIS)
|
| 642 |
#undef env
|
| 643 |
env = cpu_single_env; |
| 644 |
#define env cpu_single_env
|
| 645 |
#endif
|
| 646 |
next_tb = tcg_qemu_tb_exec(tc_ptr); |
| 647 |
if ((next_tb & 3) == 2) { |
| 648 |
/* Instruction counter expired. */
|
| 649 |
int insns_left;
|
| 650 |
tb = (TranslationBlock *)(long)(next_tb & ~3); |
| 651 |
/* Restore PC. */
|
| 652 |
cpu_pc_from_tb(env, tb); |
| 653 |
insns_left = env->icount_decr.u32; |
| 654 |
if (env->icount_extra && insns_left >= 0) { |
| 655 |
/* Refill decrementer and continue execution. */
|
| 656 |
env->icount_extra += insns_left; |
| 657 |
if (env->icount_extra > 0xffff) { |
| 658 |
insns_left = 0xffff;
|
| 659 |
} else {
|
| 660 |
insns_left = env->icount_extra; |
| 661 |
} |
| 662 |
env->icount_extra -= insns_left; |
| 663 |
env->icount_decr.u16.low = insns_left; |
| 664 |
} else {
|
| 665 |
if (insns_left > 0) { |
| 666 |
/* Execute remaining instructions. */
|
| 667 |
cpu_exec_nocache(insns_left, tb); |
| 668 |
} |
| 669 |
env->exception_index = EXCP_INTERRUPT; |
| 670 |
next_tb = 0;
|
| 671 |
cpu_loop_exit(); |
| 672 |
} |
| 673 |
} |
| 674 |
} |
| 675 |
env->current_tb = NULL;
|
| 676 |
/* reset soft MMU for next block (it can currently
|
| 677 |
only be set by a memory fault) */
|
| 678 |
} /* for(;;) */
|
| 679 |
} |
| 680 |
} /* for(;;) */
|
| 681 |
|
| 682 |
|
| 683 |
#if defined(TARGET_I386)
|
| 684 |
/* restore flags in standard format */
|
| 685 |
env->eflags = env->eflags | helper_cc_compute_all(CC_OP) | (DF & DF_MASK); |
| 686 |
#elif defined(TARGET_ARM)
|
| 687 |
/* XXX: Save/restore host fpu exception state?. */
|
| 688 |
#elif defined(TARGET_UNICORE32)
|
| 689 |
#elif defined(TARGET_SPARC)
|
| 690 |
#elif defined(TARGET_PPC)
|
| 691 |
#elif defined(TARGET_LM32)
|
| 692 |
#elif defined(TARGET_M68K)
|
| 693 |
cpu_m68k_flush_flags(env, env->cc_op); |
| 694 |
env->cc_op = CC_OP_FLAGS; |
| 695 |
env->sr = (env->sr & 0xffe0)
|
| 696 |
| env->cc_dest | (env->cc_x << 4);
|
| 697 |
#elif defined(TARGET_MICROBLAZE)
|
| 698 |
#elif defined(TARGET_MIPS)
|
| 699 |
#elif defined(TARGET_SH4)
|
| 700 |
#elif defined(TARGET_ALPHA)
|
| 701 |
#elif defined(TARGET_CRIS)
|
| 702 |
#elif defined(TARGET_S390X)
|
| 703 |
/* XXXXX */
|
| 704 |
#else
|
| 705 |
#error unsupported target CPU
|
| 706 |
#endif
|
| 707 |
|
| 708 |
/* restore global registers */
|
| 709 |
barrier(); |
| 710 |
env = (void *) saved_env_reg;
|
| 711 |
|
| 712 |
/* fail safe : never use cpu_single_env outside cpu_exec() */
|
| 713 |
cpu_single_env = NULL;
|
| 714 |
return ret;
|
| 715 |
} |
| 716 |
|
| 717 |
#if defined(TARGET_I386) && defined(CONFIG_USER_ONLY)
|
| 718 |
|
| 719 |
void cpu_x86_load_seg(CPUX86State *s, int seg_reg, int selector) |
| 720 |
{
|
| 721 |
CPUX86State *saved_env; |
| 722 |
|
| 723 |
saved_env = env; |
| 724 |
env = s; |
| 725 |
if (!(env->cr[0] & CR0_PE_MASK) || (env->eflags & VM_MASK)) { |
| 726 |
selector &= 0xffff;
|
| 727 |
cpu_x86_load_seg_cache(env, seg_reg, selector, |
| 728 |
(selector << 4), 0xffff, 0); |
| 729 |
} else {
|
| 730 |
helper_load_seg(seg_reg, selector); |
| 731 |
} |
| 732 |
env = saved_env; |
| 733 |
} |
| 734 |
|
| 735 |
void cpu_x86_fsave(CPUX86State *s, target_ulong ptr, int data32) |
| 736 |
{
|
| 737 |
CPUX86State *saved_env; |
| 738 |
|
| 739 |
saved_env = env; |
| 740 |
env = s; |
| 741 |
|
| 742 |
helper_fsave(ptr, data32); |
| 743 |
|
| 744 |
env = saved_env; |
| 745 |
} |
| 746 |
|
| 747 |
void cpu_x86_frstor(CPUX86State *s, target_ulong ptr, int data32) |
| 748 |
{
|
| 749 |
CPUX86State *saved_env; |
| 750 |
|
| 751 |
saved_env = env; |
| 752 |
env = s; |
| 753 |
|
| 754 |
helper_frstor(ptr, data32); |
| 755 |
|
| 756 |
env = saved_env; |
| 757 |
} |
| 758 |
|
| 759 |
#endif /* TARGET_I386 */ |
| 760 |
|
| 761 |
#if !defined(CONFIG_SOFTMMU)
|
| 762 |
|
| 763 |
#if defined(TARGET_I386)
|
| 764 |
#define EXCEPTION_ACTION \
|
| 765 |
raise_exception_err(env->exception_index, env->error_code) |
| 766 |
#else
|
| 767 |
#define EXCEPTION_ACTION \
|
| 768 |
cpu_loop_exit() |
| 769 |
#endif
|
| 770 |
|
| 771 |
/* 'pc' is the host PC at which the exception was raised. 'address' is
|
| 772 |
the effective address of the memory exception. 'is_write' is 1 if a
|
| 773 |
write caused the exception and otherwise 0'. 'old_set' is the
|
| 774 |
signal set which should be restored */
|
| 775 |
static inline int handle_cpu_signal(unsigned long pc, unsigned long address, |
| 776 |
int is_write, sigset_t *old_set,
|
| 777 |
void *puc)
|
| 778 |
{
|
| 779 |
TranslationBlock *tb; |
| 780 |
int ret;
|
| 781 |
|
| 782 |
if (cpu_single_env) {
|
| 783 |
env = cpu_single_env; /* XXX: find a correct solution for multithread */
|
| 784 |
} |
| 785 |
#if defined(DEBUG_SIGNAL)
|
| 786 |
qemu_printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
|
| 787 |
pc, address, is_write, *(unsigned long *)old_set); |
| 788 |
#endif
|
| 789 |
/* XXX: locking issue */
|
| 790 |
if (is_write && page_unprotect(h2g(address), pc, puc)) {
|
| 791 |
return 1; |
| 792 |
} |
| 793 |
|
| 794 |
/* see if it is an MMU fault */
|
| 795 |
ret = cpu_handle_mmu_fault(env, address, is_write, MMU_USER_IDX, 0);
|
| 796 |
if (ret < 0) { |
| 797 |
return 0; /* not an MMU fault */ |
| 798 |
} |
| 799 |
if (ret == 0) { |
| 800 |
return 1; /* the MMU fault was handled without causing real CPU fault */ |
| 801 |
} |
| 802 |
/* now we have a real cpu fault */
|
| 803 |
tb = tb_find_pc(pc); |
| 804 |
if (tb) {
|
| 805 |
/* the PC is inside the translated code. It means that we have
|
| 806 |
a virtual CPU fault */
|
| 807 |
cpu_restore_state(tb, env, pc); |
| 808 |
} |
| 809 |
|
| 810 |
/* we restore the process signal mask as the sigreturn should
|
| 811 |
do it (XXX: use sigsetjmp) */
|
| 812 |
sigprocmask(SIG_SETMASK, old_set, NULL);
|
| 813 |
EXCEPTION_ACTION; |
| 814 |
|
| 815 |
/* never comes here */
|
| 816 |
return 1; |
| 817 |
} |
| 818 |
|
| 819 |
#if defined(__i386__)
|
| 820 |
|
| 821 |
#if defined(__APPLE__)
|
| 822 |
#include <sys/ucontext.h> |
| 823 |
|
| 824 |
#define EIP_sig(context) (*((unsigned long *)&(context)->uc_mcontext->ss.eip)) |
| 825 |
#define TRAP_sig(context) ((context)->uc_mcontext->es.trapno)
|
| 826 |
#define ERROR_sig(context) ((context)->uc_mcontext->es.err)
|
| 827 |
#define MASK_sig(context) ((context)->uc_sigmask)
|
| 828 |
#elif defined(__NetBSD__)
|
| 829 |
#include <ucontext.h> |
| 830 |
|
| 831 |
#define EIP_sig(context) ((context)->uc_mcontext.__gregs[_REG_EIP])
|
| 832 |
#define TRAP_sig(context) ((context)->uc_mcontext.__gregs[_REG_TRAPNO])
|
| 833 |
#define ERROR_sig(context) ((context)->uc_mcontext.__gregs[_REG_ERR])
|
| 834 |
#define MASK_sig(context) ((context)->uc_sigmask)
|
| 835 |
#elif defined(__FreeBSD__) || defined(__DragonFly__)
|
| 836 |
#include <ucontext.h> |
| 837 |
|
| 838 |
#define EIP_sig(context) (*((unsigned long *)&(context)->uc_mcontext.mc_eip)) |
| 839 |
#define TRAP_sig(context) ((context)->uc_mcontext.mc_trapno)
|
| 840 |
#define ERROR_sig(context) ((context)->uc_mcontext.mc_err)
|
| 841 |
#define MASK_sig(context) ((context)->uc_sigmask)
|
| 842 |
#elif defined(__OpenBSD__)
|
| 843 |
#define EIP_sig(context) ((context)->sc_eip)
|
| 844 |
#define TRAP_sig(context) ((context)->sc_trapno)
|
| 845 |
#define ERROR_sig(context) ((context)->sc_err)
|
| 846 |
#define MASK_sig(context) ((context)->sc_mask)
|
| 847 |
#else
|
| 848 |
#define EIP_sig(context) ((context)->uc_mcontext.gregs[REG_EIP])
|
| 849 |
#define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO])
|
| 850 |
#define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR])
|
| 851 |
#define MASK_sig(context) ((context)->uc_sigmask)
|
| 852 |
#endif
|
| 853 |
|
| 854 |
int cpu_signal_handler(int host_signum, void *pinfo, |
| 855 |
void *puc)
|
| 856 |
{
|
| 857 |
siginfo_t *info = pinfo; |
| 858 |
#if defined(__NetBSD__) || defined(__FreeBSD__) || defined(__DragonFly__)
|
| 859 |
ucontext_t *uc = puc; |
| 860 |
#elif defined(__OpenBSD__)
|
| 861 |
struct sigcontext *uc = puc;
|
| 862 |
#else
|
| 863 |
struct ucontext *uc = puc;
|
| 864 |
#endif
|
| 865 |
unsigned long pc; |
| 866 |
int trapno;
|
| 867 |
|
| 868 |
#ifndef REG_EIP
|
| 869 |
/* for glibc 2.1 */
|
| 870 |
#define REG_EIP EIP
|
| 871 |
#define REG_ERR ERR
|
| 872 |
#define REG_TRAPNO TRAPNO
|
| 873 |
#endif
|
| 874 |
pc = EIP_sig(uc); |
| 875 |
trapno = TRAP_sig(uc); |
| 876 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
| 877 |
trapno == 0xe ?
|
| 878 |
(ERROR_sig(uc) >> 1) & 1 : 0, |
| 879 |
&MASK_sig(uc), puc); |
| 880 |
} |
| 881 |
|
| 882 |
#elif defined(__x86_64__)
|
| 883 |
|
| 884 |
#ifdef __NetBSD__
|
| 885 |
#define PC_sig(context) _UC_MACHINE_PC(context)
|
| 886 |
#define TRAP_sig(context) ((context)->uc_mcontext.__gregs[_REG_TRAPNO])
|
| 887 |
#define ERROR_sig(context) ((context)->uc_mcontext.__gregs[_REG_ERR])
|
| 888 |
#define MASK_sig(context) ((context)->uc_sigmask)
|
| 889 |
#elif defined(__OpenBSD__)
|
| 890 |
#define PC_sig(context) ((context)->sc_rip)
|
| 891 |
#define TRAP_sig(context) ((context)->sc_trapno)
|
| 892 |
#define ERROR_sig(context) ((context)->sc_err)
|
| 893 |
#define MASK_sig(context) ((context)->sc_mask)
|
| 894 |
#elif defined(__FreeBSD__) || defined(__DragonFly__)
|
| 895 |
#include <ucontext.h> |
| 896 |
|
| 897 |
#define PC_sig(context) (*((unsigned long *)&(context)->uc_mcontext.mc_rip)) |
| 898 |
#define TRAP_sig(context) ((context)->uc_mcontext.mc_trapno)
|
| 899 |
#define ERROR_sig(context) ((context)->uc_mcontext.mc_err)
|
| 900 |
#define MASK_sig(context) ((context)->uc_sigmask)
|
| 901 |
#else
|
| 902 |
#define PC_sig(context) ((context)->uc_mcontext.gregs[REG_RIP])
|
| 903 |
#define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO])
|
| 904 |
#define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR])
|
| 905 |
#define MASK_sig(context) ((context)->uc_sigmask)
|
| 906 |
#endif
|
| 907 |
|
| 908 |
int cpu_signal_handler(int host_signum, void *pinfo, |
| 909 |
void *puc)
|
| 910 |
{
|
| 911 |
siginfo_t *info = pinfo; |
| 912 |
unsigned long pc; |
| 913 |
#if defined(__NetBSD__) || defined(__FreeBSD__) || defined(__DragonFly__)
|
| 914 |
ucontext_t *uc = puc; |
| 915 |
#elif defined(__OpenBSD__)
|
| 916 |
struct sigcontext *uc = puc;
|
| 917 |
#else
|
| 918 |
struct ucontext *uc = puc;
|
| 919 |
#endif
|
| 920 |
|
| 921 |
pc = PC_sig(uc); |
| 922 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
| 923 |
TRAP_sig(uc) == 0xe ?
|
| 924 |
(ERROR_sig(uc) >> 1) & 1 : 0, |
| 925 |
&MASK_sig(uc), puc); |
| 926 |
} |
| 927 |
|
| 928 |
#elif defined(_ARCH_PPC)
|
| 929 |
|
| 930 |
/***********************************************************************
|
| 931 |
* signal context platform-specific definitions
|
| 932 |
* From Wine
|
| 933 |
*/
|
| 934 |
#ifdef linux
|
| 935 |
/* All Registers access - only for local access */
|
| 936 |
#define REG_sig(reg_name, context) \
|
| 937 |
((context)->uc_mcontext.regs->reg_name) |
| 938 |
/* Gpr Registers access */
|
| 939 |
#define GPR_sig(reg_num, context) REG_sig(gpr[reg_num], context)
|
| 940 |
/* Program counter */
|
| 941 |
#define IAR_sig(context) REG_sig(nip, context)
|
| 942 |
/* Machine State Register (Supervisor) */
|
| 943 |
#define MSR_sig(context) REG_sig(msr, context)
|
| 944 |
/* Count register */
|
| 945 |
#define CTR_sig(context) REG_sig(ctr, context)
|
| 946 |
/* User's integer exception register */
|
| 947 |
#define XER_sig(context) REG_sig(xer, context)
|
| 948 |
/* Link register */
|
| 949 |
#define LR_sig(context) REG_sig(link, context)
|
| 950 |
/* Condition register */
|
| 951 |
#define CR_sig(context) REG_sig(ccr, context)
|
| 952 |
|
| 953 |
/* Float Registers access */
|
| 954 |
#define FLOAT_sig(reg_num, context) \
|
| 955 |
(((double *)((char *)((context)->uc_mcontext.regs + 48 * 4)))[reg_num]) |
| 956 |
#define FPSCR_sig(context) \
|
| 957 |
(*(int *)((char *)((context)->uc_mcontext.regs + (48 + 32 * 2) * 4))) |
| 958 |
/* Exception Registers access */
|
| 959 |
#define DAR_sig(context) REG_sig(dar, context)
|
| 960 |
#define DSISR_sig(context) REG_sig(dsisr, context)
|
| 961 |
#define TRAP_sig(context) REG_sig(trap, context)
|
| 962 |
#endif /* linux */ |
| 963 |
|
| 964 |
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
|
| 965 |
#include <ucontext.h> |
| 966 |
#define IAR_sig(context) ((context)->uc_mcontext.mc_srr0)
|
| 967 |
#define MSR_sig(context) ((context)->uc_mcontext.mc_srr1)
|
| 968 |
#define CTR_sig(context) ((context)->uc_mcontext.mc_ctr)
|
| 969 |
#define XER_sig(context) ((context)->uc_mcontext.mc_xer)
|
| 970 |
#define LR_sig(context) ((context)->uc_mcontext.mc_lr)
|
| 971 |
#define CR_sig(context) ((context)->uc_mcontext.mc_cr)
|
| 972 |
/* Exception Registers access */
|
| 973 |
#define DAR_sig(context) ((context)->uc_mcontext.mc_dar)
|
| 974 |
#define DSISR_sig(context) ((context)->uc_mcontext.mc_dsisr)
|
| 975 |
#define TRAP_sig(context) ((context)->uc_mcontext.mc_exc)
|
| 976 |
#endif /* __FreeBSD__|| __FreeBSD_kernel__ */ |
| 977 |
|
| 978 |
#ifdef __APPLE__
|
| 979 |
#include <sys/ucontext.h> |
| 980 |
typedef struct ucontext SIGCONTEXT; |
| 981 |
/* All Registers access - only for local access */
|
| 982 |
#define REG_sig(reg_name, context) \
|
| 983 |
((context)->uc_mcontext->ss.reg_name) |
| 984 |
#define FLOATREG_sig(reg_name, context) \
|
| 985 |
((context)->uc_mcontext->fs.reg_name) |
| 986 |
#define EXCEPREG_sig(reg_name, context) \
|
| 987 |
((context)->uc_mcontext->es.reg_name) |
| 988 |
#define VECREG_sig(reg_name, context) \
|
| 989 |
((context)->uc_mcontext->vs.reg_name) |
| 990 |
/* Gpr Registers access */
|
| 991 |
#define GPR_sig(reg_num, context) REG_sig(r##reg_num, context) |
| 992 |
/* Program counter */
|
| 993 |
#define IAR_sig(context) REG_sig(srr0, context)
|
| 994 |
/* Machine State Register (Supervisor) */
|
| 995 |
#define MSR_sig(context) REG_sig(srr1, context)
|
| 996 |
#define CTR_sig(context) REG_sig(ctr, context)
|
| 997 |
/* Link register */
|
| 998 |
#define XER_sig(context) REG_sig(xer, context)
|
| 999 |
/* User's integer exception register */
|
| 1000 |
#define LR_sig(context) REG_sig(lr, context)
|
| 1001 |
/* Condition register */
|
| 1002 |
#define CR_sig(context) REG_sig(cr, context)
|
| 1003 |
/* Float Registers access */
|
| 1004 |
#define FLOAT_sig(reg_num, context) \
|
| 1005 |
FLOATREG_sig(fpregs[reg_num], context) |
| 1006 |
#define FPSCR_sig(context) \
|
| 1007 |
((double)FLOATREG_sig(fpscr, context))
|
| 1008 |
/* Exception Registers access */
|
| 1009 |
/* Fault registers for coredump */
|
| 1010 |
#define DAR_sig(context) EXCEPREG_sig(dar, context)
|
| 1011 |
#define DSISR_sig(context) EXCEPREG_sig(dsisr, context)
|
| 1012 |
/* number of powerpc exception taken */
|
| 1013 |
#define TRAP_sig(context) EXCEPREG_sig(exception, context)
|
| 1014 |
#endif /* __APPLE__ */ |
| 1015 |
|
| 1016 |
int cpu_signal_handler(int host_signum, void *pinfo, |
| 1017 |
void *puc)
|
| 1018 |
{
|
| 1019 |
siginfo_t *info = pinfo; |
| 1020 |
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
|
| 1021 |
ucontext_t *uc = puc; |
| 1022 |
#else
|
| 1023 |
struct ucontext *uc = puc;
|
| 1024 |
#endif
|
| 1025 |
unsigned long pc; |
| 1026 |
int is_write;
|
| 1027 |
|
| 1028 |
pc = IAR_sig(uc); |
| 1029 |
is_write = 0;
|
| 1030 |
#if 0
|
| 1031 |
/* ppc 4xx case */
|
| 1032 |
if (DSISR_sig(uc) & 0x00800000) {
|
| 1033 |
is_write = 1;
|
| 1034 |
}
|
| 1035 |
#else
|
| 1036 |
if (TRAP_sig(uc) != 0x400 && (DSISR_sig(uc) & 0x02000000)) { |
| 1037 |
is_write = 1;
|
| 1038 |
} |
| 1039 |
#endif
|
| 1040 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
| 1041 |
is_write, &uc->uc_sigmask, puc); |
| 1042 |
} |
| 1043 |
|
| 1044 |
#elif defined(__alpha__)
|
| 1045 |
|
| 1046 |
int cpu_signal_handler(int host_signum, void *pinfo, |
| 1047 |
void *puc)
|
| 1048 |
{
|
| 1049 |
siginfo_t *info = pinfo; |
| 1050 |
struct ucontext *uc = puc;
|
| 1051 |
uint32_t *pc = uc->uc_mcontext.sc_pc; |
| 1052 |
uint32_t insn = *pc; |
| 1053 |
int is_write = 0; |
| 1054 |
|
| 1055 |
/* XXX: need kernel patch to get write flag faster */
|
| 1056 |
switch (insn >> 26) { |
| 1057 |
case 0x0d: /* stw */ |
| 1058 |
case 0x0e: /* stb */ |
| 1059 |
case 0x0f: /* stq_u */ |
| 1060 |
case 0x24: /* stf */ |
| 1061 |
case 0x25: /* stg */ |
| 1062 |
case 0x26: /* sts */ |
| 1063 |
case 0x27: /* stt */ |
| 1064 |
case 0x2c: /* stl */ |
| 1065 |
case 0x2d: /* stq */ |
| 1066 |
case 0x2e: /* stl_c */ |
| 1067 |
case 0x2f: /* stq_c */ |
| 1068 |
is_write = 1;
|
| 1069 |
} |
| 1070 |
|
| 1071 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
| 1072 |
is_write, &uc->uc_sigmask, puc); |
| 1073 |
} |
| 1074 |
#elif defined(__sparc__)
|
| 1075 |
|
| 1076 |
int cpu_signal_handler(int host_signum, void *pinfo, |
| 1077 |
void *puc)
|
| 1078 |
{
|
| 1079 |
siginfo_t *info = pinfo; |
| 1080 |
int is_write;
|
| 1081 |
uint32_t insn; |
| 1082 |
#if !defined(__arch64__) || defined(CONFIG_SOLARIS)
|
| 1083 |
uint32_t *regs = (uint32_t *)(info + 1);
|
| 1084 |
void *sigmask = (regs + 20); |
| 1085 |
/* XXX: is there a standard glibc define ? */
|
| 1086 |
unsigned long pc = regs[1]; |
| 1087 |
#else
|
| 1088 |
#ifdef __linux__
|
| 1089 |
struct sigcontext *sc = puc;
|
| 1090 |
unsigned long pc = sc->sigc_regs.tpc; |
| 1091 |
void *sigmask = (void *)sc->sigc_mask; |
| 1092 |
#elif defined(__OpenBSD__)
|
| 1093 |
struct sigcontext *uc = puc;
|
| 1094 |
unsigned long pc = uc->sc_pc; |
| 1095 |
void *sigmask = (void *)(long)uc->sc_mask; |
| 1096 |
#endif
|
| 1097 |
#endif
|
| 1098 |
|
| 1099 |
/* XXX: need kernel patch to get write flag faster */
|
| 1100 |
is_write = 0;
|
| 1101 |
insn = *(uint32_t *)pc; |
| 1102 |
if ((insn >> 30) == 3) { |
| 1103 |
switch ((insn >> 19) & 0x3f) { |
| 1104 |
case 0x05: /* stb */ |
| 1105 |
case 0x15: /* stba */ |
| 1106 |
case 0x06: /* sth */ |
| 1107 |
case 0x16: /* stha */ |
| 1108 |
case 0x04: /* st */ |
| 1109 |
case 0x14: /* sta */ |
| 1110 |
case 0x07: /* std */ |
| 1111 |
case 0x17: /* stda */ |
| 1112 |
case 0x0e: /* stx */ |
| 1113 |
case 0x1e: /* stxa */ |
| 1114 |
case 0x24: /* stf */ |
| 1115 |
case 0x34: /* stfa */ |
| 1116 |
case 0x27: /* stdf */ |
| 1117 |
case 0x37: /* stdfa */ |
| 1118 |
case 0x26: /* stqf */ |
| 1119 |
case 0x36: /* stqfa */ |
| 1120 |
case 0x25: /* stfsr */ |
| 1121 |
case 0x3c: /* casa */ |
| 1122 |
case 0x3e: /* casxa */ |
| 1123 |
is_write = 1;
|
| 1124 |
break;
|
| 1125 |
} |
| 1126 |
} |
| 1127 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
| 1128 |
is_write, sigmask, NULL);
|
| 1129 |
} |
| 1130 |
|
| 1131 |
#elif defined(__arm__)
|
| 1132 |
|
| 1133 |
int cpu_signal_handler(int host_signum, void *pinfo, |
| 1134 |
void *puc)
|
| 1135 |
{
|
| 1136 |
siginfo_t *info = pinfo; |
| 1137 |
struct ucontext *uc = puc;
|
| 1138 |
unsigned long pc; |
| 1139 |
int is_write;
|
| 1140 |
|
| 1141 |
#if (__GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ <= 3)) |
| 1142 |
pc = uc->uc_mcontext.gregs[R15]; |
| 1143 |
#else
|
| 1144 |
pc = uc->uc_mcontext.arm_pc; |
| 1145 |
#endif
|
| 1146 |
/* XXX: compute is_write */
|
| 1147 |
is_write = 0;
|
| 1148 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
| 1149 |
is_write, |
| 1150 |
&uc->uc_sigmask, puc); |
| 1151 |
} |
| 1152 |
|
| 1153 |
#elif defined(__mc68000)
|
| 1154 |
|
| 1155 |
int cpu_signal_handler(int host_signum, void *pinfo, |
| 1156 |
void *puc)
|
| 1157 |
{
|
| 1158 |
siginfo_t *info = pinfo; |
| 1159 |
struct ucontext *uc = puc;
|
| 1160 |
unsigned long pc; |
| 1161 |
int is_write;
|
| 1162 |
|
| 1163 |
pc = uc->uc_mcontext.gregs[16];
|
| 1164 |
/* XXX: compute is_write */
|
| 1165 |
is_write = 0;
|
| 1166 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
| 1167 |
is_write, |
| 1168 |
&uc->uc_sigmask, puc); |
| 1169 |
} |
| 1170 |
|
| 1171 |
#elif defined(__ia64)
|
| 1172 |
|
| 1173 |
#ifndef __ISR_VALID
|
| 1174 |
/* This ought to be in <bits/siginfo.h>... */
|
| 1175 |
# define __ISR_VALID 1 |
| 1176 |
#endif
|
| 1177 |
|
| 1178 |
int cpu_signal_handler(int host_signum, void *pinfo, void *puc) |
| 1179 |
{
|
| 1180 |
siginfo_t *info = pinfo; |
| 1181 |
struct ucontext *uc = puc;
|
| 1182 |
unsigned long ip; |
| 1183 |
int is_write = 0; |
| 1184 |
|
| 1185 |
ip = uc->uc_mcontext.sc_ip; |
| 1186 |
switch (host_signum) {
|
| 1187 |
case SIGILL:
|
| 1188 |
case SIGFPE:
|
| 1189 |
case SIGSEGV:
|
| 1190 |
case SIGBUS:
|
| 1191 |
case SIGTRAP:
|
| 1192 |
if (info->si_code && (info->si_segvflags & __ISR_VALID)) {
|
| 1193 |
/* ISR.W (write-access) is bit 33: */
|
| 1194 |
is_write = (info->si_isr >> 33) & 1; |
| 1195 |
} |
| 1196 |
break;
|
| 1197 |
|
| 1198 |
default:
|
| 1199 |
break;
|
| 1200 |
} |
| 1201 |
return handle_cpu_signal(ip, (unsigned long)info->si_addr, |
| 1202 |
is_write, |
| 1203 |
(sigset_t *)&uc->uc_sigmask, puc); |
| 1204 |
} |
| 1205 |
|
| 1206 |
#elif defined(__s390__)
|
| 1207 |
|
| 1208 |
int cpu_signal_handler(int host_signum, void *pinfo, |
| 1209 |
void *puc)
|
| 1210 |
{
|
| 1211 |
siginfo_t *info = pinfo; |
| 1212 |
struct ucontext *uc = puc;
|
| 1213 |
unsigned long pc; |
| 1214 |
uint16_t *pinsn; |
| 1215 |
int is_write = 0; |
| 1216 |
|
| 1217 |
pc = uc->uc_mcontext.psw.addr; |
| 1218 |
|
| 1219 |
/* ??? On linux, the non-rt signal handler has 4 (!) arguments instead
|
| 1220 |
of the normal 2 arguments. The 3rd argument contains the "int_code"
|
| 1221 |
from the hardware which does in fact contain the is_write value.
|
| 1222 |
The rt signal handler, as far as I can tell, does not give this value
|
| 1223 |
at all. Not that we could get to it from here even if it were. */
|
| 1224 |
/* ??? This is not even close to complete, since it ignores all
|
| 1225 |
of the read-modify-write instructions. */
|
| 1226 |
pinsn = (uint16_t *)pc; |
| 1227 |
switch (pinsn[0] >> 8) { |
| 1228 |
case 0x50: /* ST */ |
| 1229 |
case 0x42: /* STC */ |
| 1230 |
case 0x40: /* STH */ |
| 1231 |
is_write = 1;
|
| 1232 |
break;
|
| 1233 |
case 0xc4: /* RIL format insns */ |
| 1234 |
switch (pinsn[0] & 0xf) { |
| 1235 |
case 0xf: /* STRL */ |
| 1236 |
case 0xb: /* STGRL */ |
| 1237 |
case 0x7: /* STHRL */ |
| 1238 |
is_write = 1;
|
| 1239 |
} |
| 1240 |
break;
|
| 1241 |
case 0xe3: /* RXY format insns */ |
| 1242 |
switch (pinsn[2] & 0xff) { |
| 1243 |
case 0x50: /* STY */ |
| 1244 |
case 0x24: /* STG */ |
| 1245 |
case 0x72: /* STCY */ |
| 1246 |
case 0x70: /* STHY */ |
| 1247 |
case 0x8e: /* STPQ */ |
| 1248 |
case 0x3f: /* STRVH */ |
| 1249 |
case 0x3e: /* STRV */ |
| 1250 |
case 0x2f: /* STRVG */ |
| 1251 |
is_write = 1;
|
| 1252 |
} |
| 1253 |
break;
|
| 1254 |
} |
| 1255 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
| 1256 |
is_write, &uc->uc_sigmask, puc); |
| 1257 |
} |
| 1258 |
|
| 1259 |
#elif defined(__mips__)
|
| 1260 |
|
| 1261 |
int cpu_signal_handler(int host_signum, void *pinfo, |
| 1262 |
void *puc)
|
| 1263 |
{
|
| 1264 |
siginfo_t *info = pinfo; |
| 1265 |
struct ucontext *uc = puc;
|
| 1266 |
greg_t pc = uc->uc_mcontext.pc; |
| 1267 |
int is_write;
|
| 1268 |
|
| 1269 |
/* XXX: compute is_write */
|
| 1270 |
is_write = 0;
|
| 1271 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
| 1272 |
is_write, &uc->uc_sigmask, puc); |
| 1273 |
} |
| 1274 |
|
| 1275 |
#elif defined(__hppa__)
|
| 1276 |
|
| 1277 |
int cpu_signal_handler(int host_signum, void *pinfo, |
| 1278 |
void *puc)
|
| 1279 |
{
|
| 1280 |
struct siginfo *info = pinfo;
|
| 1281 |
struct ucontext *uc = puc;
|
| 1282 |
unsigned long pc = uc->uc_mcontext.sc_iaoq[0]; |
| 1283 |
uint32_t insn = *(uint32_t *)pc; |
| 1284 |
int is_write = 0; |
| 1285 |
|
| 1286 |
/* XXX: need kernel patch to get write flag faster. */
|
| 1287 |
switch (insn >> 26) { |
| 1288 |
case 0x1a: /* STW */ |
| 1289 |
case 0x19: /* STH */ |
| 1290 |
case 0x18: /* STB */ |
| 1291 |
case 0x1b: /* STWM */ |
| 1292 |
is_write = 1;
|
| 1293 |
break;
|
| 1294 |
|
| 1295 |
case 0x09: /* CSTWX, FSTWX, FSTWS */ |
| 1296 |
case 0x0b: /* CSTDX, FSTDX, FSTDS */ |
| 1297 |
/* Distinguish from coprocessor load ... */
|
| 1298 |
is_write = (insn >> 9) & 1; |
| 1299 |
break;
|
| 1300 |
|
| 1301 |
case 0x03: |
| 1302 |
switch ((insn >> 6) & 15) { |
| 1303 |
case 0xa: /* STWS */ |
| 1304 |
case 0x9: /* STHS */ |
| 1305 |
case 0x8: /* STBS */ |
| 1306 |
case 0xe: /* STWAS */ |
| 1307 |
case 0xc: /* STBYS */ |
| 1308 |
is_write = 1;
|
| 1309 |
} |
| 1310 |
break;
|
| 1311 |
} |
| 1312 |
|
| 1313 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
| 1314 |
is_write, &uc->uc_sigmask, puc); |
| 1315 |
} |
| 1316 |
|
| 1317 |
#else
|
| 1318 |
|
| 1319 |
#error host CPU specific signal handler needed
|
| 1320 |
|
| 1321 |
#endif
|
| 1322 |
|
| 1323 |
#endif /* !defined(CONFIG_SOFTMMU) */ |