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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" |
25 |
|
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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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//#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; |
78 |
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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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} |
98 |
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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]; |
144 |
for(;;) {
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tb = *ptb1; |
146 |
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); |
157 |
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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/* 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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} |
215 |
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env1->halted = 0;
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} |
218 |
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cpu_single_env = env1; |
220 |
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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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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; |
244 |
#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_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) { |
262 |
#if defined(__sparc__) && !defined(CONFIG_SOLARIS)
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#undef env
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env = cpu_single_env; |
265 |
#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) { |
269 |
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; |
272 |
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, |
280 |
env->exception_is_int, |
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env->error_code, |
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env->exception_next_eip); |
283 |
/* successfully delivered */
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env->old_exception = -1;
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#endif
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ret = env->exception_index; |
287 |
break;
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288 |
#else
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289 |
#if defined(TARGET_I386)
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/* simulate a real cpu exception. On i386, it can
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291 |
trigger new exceptions, but we do not handle
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double or triple faults yet. */
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293 |
do_interrupt(env->exception_index, |
294 |
env->exception_is_int, |
295 |
env->error_code, |
296 |
env->exception_next_eip, 0);
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297 |
/* successfully delivered */
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298 |
env->old_exception = -1;
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299 |
#elif defined(TARGET_PPC)
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do_interrupt(env); |
301 |
#elif defined(TARGET_LM32)
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302 |
do_interrupt(env); |
303 |
#elif defined(TARGET_MICROBLAZE)
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304 |
do_interrupt(env); |
305 |
#elif defined(TARGET_MIPS)
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do_interrupt(env); |
307 |
#elif defined(TARGET_SPARC)
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308 |
do_interrupt(env); |
309 |
#elif defined(TARGET_ARM)
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310 |
do_interrupt(env); |
311 |
#elif defined(TARGET_SH4)
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312 |
do_interrupt(env); |
313 |
#elif defined(TARGET_ALPHA)
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314 |
do_interrupt(env); |
315 |
#elif defined(TARGET_CRIS)
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316 |
do_interrupt(env); |
317 |
#elif defined(TARGET_M68K)
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318 |
do_interrupt(0);
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319 |
#endif
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320 |
env->exception_index = -1;
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321 |
#endif
|
322 |
} |
323 |
} |
324 |
|
325 |
next_tb = 0; /* force lookup of first TB */ |
326 |
for(;;) {
|
327 |
interrupt_request = env->interrupt_request; |
328 |
if (unlikely(interrupt_request)) {
|
329 |
if (unlikely(env->singlestep_enabled & SSTEP_NOIRQ)) {
|
330 |
/* Mask out external interrupts for this step. */
|
331 |
interrupt_request &= ~(CPU_INTERRUPT_HARD | |
332 |
CPU_INTERRUPT_FIQ | |
333 |
CPU_INTERRUPT_SMI | |
334 |
CPU_INTERRUPT_NMI); |
335 |
} |
336 |
if (interrupt_request & CPU_INTERRUPT_DEBUG) {
|
337 |
env->interrupt_request &= ~CPU_INTERRUPT_DEBUG; |
338 |
env->exception_index = EXCP_DEBUG; |
339 |
cpu_loop_exit(); |
340 |
} |
341 |
#if defined(TARGET_ARM) || defined(TARGET_SPARC) || defined(TARGET_MIPS) || \
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342 |
defined(TARGET_PPC) || defined(TARGET_ALPHA) || defined(TARGET_CRIS) || \ |
343 |
defined(TARGET_MICROBLAZE) || defined(TARGET_LM32) |
344 |
if (interrupt_request & CPU_INTERRUPT_HALT) {
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345 |
env->interrupt_request &= ~CPU_INTERRUPT_HALT; |
346 |
env->halted = 1;
|
347 |
env->exception_index = EXCP_HLT; |
348 |
cpu_loop_exit(); |
349 |
} |
350 |
#endif
|
351 |
#if defined(TARGET_I386)
|
352 |
if (interrupt_request & CPU_INTERRUPT_INIT) {
|
353 |
svm_check_intercept(SVM_EXIT_INIT); |
354 |
do_cpu_init(env); |
355 |
env->exception_index = EXCP_HALTED; |
356 |
cpu_loop_exit(); |
357 |
} else if (interrupt_request & CPU_INTERRUPT_SIPI) { |
358 |
do_cpu_sipi(env); |
359 |
} else if (env->hflags2 & HF2_GIF_MASK) { |
360 |
if ((interrupt_request & CPU_INTERRUPT_SMI) &&
|
361 |
!(env->hflags & HF_SMM_MASK)) { |
362 |
svm_check_intercept(SVM_EXIT_SMI); |
363 |
env->interrupt_request &= ~CPU_INTERRUPT_SMI; |
364 |
do_smm_enter(); |
365 |
next_tb = 0;
|
366 |
} else if ((interrupt_request & CPU_INTERRUPT_NMI) && |
367 |
!(env->hflags2 & HF2_NMI_MASK)) { |
368 |
env->interrupt_request &= ~CPU_INTERRUPT_NMI; |
369 |
env->hflags2 |= HF2_NMI_MASK; |
370 |
do_interrupt(EXCP02_NMI, 0, 0, 0, 1); |
371 |
next_tb = 0;
|
372 |
} else if (interrupt_request & CPU_INTERRUPT_MCE) { |
373 |
env->interrupt_request &= ~CPU_INTERRUPT_MCE; |
374 |
do_interrupt(EXCP12_MCHK, 0, 0, 0, 0); |
375 |
next_tb = 0;
|
376 |
} else if ((interrupt_request & CPU_INTERRUPT_HARD) && |
377 |
(((env->hflags2 & HF2_VINTR_MASK) && |
378 |
(env->hflags2 & HF2_HIF_MASK)) || |
379 |
(!(env->hflags2 & HF2_VINTR_MASK) && |
380 |
(env->eflags & IF_MASK && |
381 |
!(env->hflags & HF_INHIBIT_IRQ_MASK))))) { |
382 |
int intno;
|
383 |
svm_check_intercept(SVM_EXIT_INTR); |
384 |
env->interrupt_request &= ~(CPU_INTERRUPT_HARD | CPU_INTERRUPT_VIRQ); |
385 |
intno = cpu_get_pic_interrupt(env); |
386 |
qemu_log_mask(CPU_LOG_TB_IN_ASM, "Servicing hardware INT=0x%02x\n", intno);
|
387 |
#if defined(__sparc__) && !defined(CONFIG_SOLARIS)
|
388 |
#undef env
|
389 |
env = cpu_single_env; |
390 |
#define env cpu_single_env
|
391 |
#endif
|
392 |
do_interrupt(intno, 0, 0, 0, 1); |
393 |
/* ensure that no TB jump will be modified as
|
394 |
the program flow was changed */
|
395 |
next_tb = 0;
|
396 |
#if !defined(CONFIG_USER_ONLY)
|
397 |
} else if ((interrupt_request & CPU_INTERRUPT_VIRQ) && |
398 |
(env->eflags & IF_MASK) && |
399 |
!(env->hflags & HF_INHIBIT_IRQ_MASK)) { |
400 |
int intno;
|
401 |
/* FIXME: this should respect TPR */
|
402 |
svm_check_intercept(SVM_EXIT_VINTR); |
403 |
intno = ldl_phys(env->vm_vmcb + offsetof(struct vmcb, control.int_vector));
|
404 |
qemu_log_mask(CPU_LOG_TB_IN_ASM, "Servicing virtual hardware INT=0x%02x\n", intno);
|
405 |
do_interrupt(intno, 0, 0, 0, 1); |
406 |
env->interrupt_request &= ~CPU_INTERRUPT_VIRQ; |
407 |
next_tb = 0;
|
408 |
#endif
|
409 |
} |
410 |
} |
411 |
#elif defined(TARGET_PPC)
|
412 |
#if 0
|
413 |
if ((interrupt_request & CPU_INTERRUPT_RESET)) {
|
414 |
cpu_reset(env);
|
415 |
}
|
416 |
#endif
|
417 |
if (interrupt_request & CPU_INTERRUPT_HARD) {
|
418 |
ppc_hw_interrupt(env); |
419 |
if (env->pending_interrupts == 0) |
420 |
env->interrupt_request &= ~CPU_INTERRUPT_HARD; |
421 |
next_tb = 0;
|
422 |
} |
423 |
#elif defined(TARGET_LM32)
|
424 |
if ((interrupt_request & CPU_INTERRUPT_HARD)
|
425 |
&& (env->ie & IE_IE)) { |
426 |
env->exception_index = EXCP_IRQ; |
427 |
do_interrupt(env); |
428 |
next_tb = 0;
|
429 |
} |
430 |
#elif defined(TARGET_MICROBLAZE)
|
431 |
if ((interrupt_request & CPU_INTERRUPT_HARD)
|
432 |
&& (env->sregs[SR_MSR] & MSR_IE) |
433 |
&& !(env->sregs[SR_MSR] & (MSR_EIP | MSR_BIP)) |
434 |
&& !(env->iflags & (D_FLAG | IMM_FLAG))) { |
435 |
env->exception_index = EXCP_IRQ; |
436 |
do_interrupt(env); |
437 |
next_tb = 0;
|
438 |
} |
439 |
#elif defined(TARGET_MIPS)
|
440 |
if ((interrupt_request & CPU_INTERRUPT_HARD) &&
|
441 |
cpu_mips_hw_interrupts_pending(env)) { |
442 |
/* Raise it */
|
443 |
env->exception_index = EXCP_EXT_INTERRUPT; |
444 |
env->error_code = 0;
|
445 |
do_interrupt(env); |
446 |
next_tb = 0;
|
447 |
} |
448 |
#elif defined(TARGET_SPARC)
|
449 |
if (interrupt_request & CPU_INTERRUPT_HARD) {
|
450 |
if (cpu_interrupts_enabled(env) &&
|
451 |
env->interrupt_index > 0) {
|
452 |
int pil = env->interrupt_index & 0xf; |
453 |
int type = env->interrupt_index & 0xf0; |
454 |
|
455 |
if (((type == TT_EXTINT) &&
|
456 |
cpu_pil_allowed(env, pil)) || |
457 |
type != TT_EXTINT) { |
458 |
env->exception_index = env->interrupt_index; |
459 |
do_interrupt(env); |
460 |
next_tb = 0;
|
461 |
} |
462 |
} |
463 |
} else if (interrupt_request & CPU_INTERRUPT_TIMER) { |
464 |
//do_interrupt(0, 0, 0, 0, 0);
|
465 |
env->interrupt_request &= ~CPU_INTERRUPT_TIMER; |
466 |
} |
467 |
#elif defined(TARGET_ARM)
|
468 |
if (interrupt_request & CPU_INTERRUPT_FIQ
|
469 |
&& !(env->uncached_cpsr & CPSR_F)) { |
470 |
env->exception_index = EXCP_FIQ; |
471 |
do_interrupt(env); |
472 |
next_tb = 0;
|
473 |
} |
474 |
/* ARMv7-M interrupt return works by loading a magic value
|
475 |
into the PC. On real hardware the load causes the
|
476 |
return to occur. The qemu implementation performs the
|
477 |
jump normally, then does the exception return when the
|
478 |
CPU tries to execute code at the magic address.
|
479 |
This will cause the magic PC value to be pushed to
|
480 |
the stack if an interrupt occured at the wrong time.
|
481 |
We avoid this by disabling interrupts when
|
482 |
pc contains a magic address. */
|
483 |
if (interrupt_request & CPU_INTERRUPT_HARD
|
484 |
&& ((IS_M(env) && env->regs[15] < 0xfffffff0) |
485 |
|| !(env->uncached_cpsr & CPSR_I))) { |
486 |
env->exception_index = EXCP_IRQ; |
487 |
do_interrupt(env); |
488 |
next_tb = 0;
|
489 |
} |
490 |
#elif defined(TARGET_SH4)
|
491 |
if (interrupt_request & CPU_INTERRUPT_HARD) {
|
492 |
do_interrupt(env); |
493 |
next_tb = 0;
|
494 |
} |
495 |
#elif defined(TARGET_ALPHA)
|
496 |
if (interrupt_request & CPU_INTERRUPT_HARD) {
|
497 |
do_interrupt(env); |
498 |
next_tb = 0;
|
499 |
} |
500 |
#elif defined(TARGET_CRIS)
|
501 |
if (interrupt_request & CPU_INTERRUPT_HARD
|
502 |
&& (env->pregs[PR_CCS] & I_FLAG) |
503 |
&& !env->locked_irq) { |
504 |
env->exception_index = EXCP_IRQ; |
505 |
do_interrupt(env); |
506 |
next_tb = 0;
|
507 |
} |
508 |
if (interrupt_request & CPU_INTERRUPT_NMI
|
509 |
&& (env->pregs[PR_CCS] & M_FLAG)) { |
510 |
env->exception_index = EXCP_NMI; |
511 |
do_interrupt(env); |
512 |
next_tb = 0;
|
513 |
} |
514 |
#elif defined(TARGET_M68K)
|
515 |
if (interrupt_request & CPU_INTERRUPT_HARD
|
516 |
&& ((env->sr & SR_I) >> SR_I_SHIFT) |
517 |
< env->pending_level) { |
518 |
/* Real hardware gets the interrupt vector via an
|
519 |
IACK cycle at this point. Current emulated
|
520 |
hardware doesn't rely on this, so we
|
521 |
provide/save the vector when the interrupt is
|
522 |
first signalled. */
|
523 |
env->exception_index = env->pending_vector; |
524 |
do_interrupt(1);
|
525 |
next_tb = 0;
|
526 |
} |
527 |
#endif
|
528 |
/* Don't use the cached interupt_request value,
|
529 |
do_interrupt may have updated the EXITTB flag. */
|
530 |
if (env->interrupt_request & CPU_INTERRUPT_EXITTB) {
|
531 |
env->interrupt_request &= ~CPU_INTERRUPT_EXITTB; |
532 |
/* ensure that no TB jump will be modified as
|
533 |
the program flow was changed */
|
534 |
next_tb = 0;
|
535 |
} |
536 |
} |
537 |
if (unlikely(env->exit_request)) {
|
538 |
env->exit_request = 0;
|
539 |
env->exception_index = EXCP_INTERRUPT; |
540 |
cpu_loop_exit(); |
541 |
} |
542 |
#if defined(DEBUG_DISAS) || defined(CONFIG_DEBUG_EXEC)
|
543 |
if (qemu_loglevel_mask(CPU_LOG_TB_CPU)) {
|
544 |
/* restore flags in standard format */
|
545 |
#if defined(TARGET_I386)
|
546 |
env->eflags = env->eflags | helper_cc_compute_all(CC_OP) | (DF & DF_MASK); |
547 |
log_cpu_state(env, X86_DUMP_CCOP); |
548 |
env->eflags &= ~(DF_MASK | CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C); |
549 |
#elif defined(TARGET_M68K)
|
550 |
cpu_m68k_flush_flags(env, env->cc_op); |
551 |
env->cc_op = CC_OP_FLAGS; |
552 |
env->sr = (env->sr & 0xffe0)
|
553 |
| env->cc_dest | (env->cc_x << 4);
|
554 |
log_cpu_state(env, 0);
|
555 |
#else
|
556 |
log_cpu_state(env, 0);
|
557 |
#endif
|
558 |
} |
559 |
#endif /* DEBUG_DISAS || CONFIG_DEBUG_EXEC */ |
560 |
spin_lock(&tb_lock); |
561 |
tb = tb_find_fast(); |
562 |
/* Note: we do it here to avoid a gcc bug on Mac OS X when
|
563 |
doing it in tb_find_slow */
|
564 |
if (tb_invalidated_flag) {
|
565 |
/* as some TB could have been invalidated because
|
566 |
of memory exceptions while generating the code, we
|
567 |
must recompute the hash index here */
|
568 |
next_tb = 0;
|
569 |
tb_invalidated_flag = 0;
|
570 |
} |
571 |
#ifdef CONFIG_DEBUG_EXEC
|
572 |
qemu_log_mask(CPU_LOG_EXEC, "Trace 0x%08lx [" TARGET_FMT_lx "] %s\n", |
573 |
(long)tb->tc_ptr, tb->pc,
|
574 |
lookup_symbol(tb->pc)); |
575 |
#endif
|
576 |
/* see if we can patch the calling TB. When the TB
|
577 |
spans two pages, we cannot safely do a direct
|
578 |
jump. */
|
579 |
if (next_tb != 0 && tb->page_addr[1] == -1) { |
580 |
tb_add_jump((TranslationBlock *)(next_tb & ~3), next_tb & 3, tb); |
581 |
} |
582 |
spin_unlock(&tb_lock); |
583 |
|
584 |
/* cpu_interrupt might be called while translating the
|
585 |
TB, but before it is linked into a potentially
|
586 |
infinite loop and becomes env->current_tb. Avoid
|
587 |
starting execution if there is a pending interrupt. */
|
588 |
env->current_tb = tb; |
589 |
barrier(); |
590 |
if (likely(!env->exit_request)) {
|
591 |
tc_ptr = tb->tc_ptr; |
592 |
/* execute the generated code */
|
593 |
#if defined(__sparc__) && !defined(CONFIG_SOLARIS)
|
594 |
#undef env
|
595 |
env = cpu_single_env; |
596 |
#define env cpu_single_env
|
597 |
#endif
|
598 |
next_tb = tcg_qemu_tb_exec(tc_ptr); |
599 |
if ((next_tb & 3) == 2) { |
600 |
/* Instruction counter expired. */
|
601 |
int insns_left;
|
602 |
tb = (TranslationBlock *)(long)(next_tb & ~3); |
603 |
/* Restore PC. */
|
604 |
cpu_pc_from_tb(env, tb); |
605 |
insns_left = env->icount_decr.u32; |
606 |
if (env->icount_extra && insns_left >= 0) { |
607 |
/* Refill decrementer and continue execution. */
|
608 |
env->icount_extra += insns_left; |
609 |
if (env->icount_extra > 0xffff) { |
610 |
insns_left = 0xffff;
|
611 |
} else {
|
612 |
insns_left = env->icount_extra; |
613 |
} |
614 |
env->icount_extra -= insns_left; |
615 |
env->icount_decr.u16.low = insns_left; |
616 |
} else {
|
617 |
if (insns_left > 0) { |
618 |
/* Execute remaining instructions. */
|
619 |
cpu_exec_nocache(insns_left, tb); |
620 |
} |
621 |
env->exception_index = EXCP_INTERRUPT; |
622 |
next_tb = 0;
|
623 |
cpu_loop_exit(); |
624 |
} |
625 |
} |
626 |
} |
627 |
env->current_tb = NULL;
|
628 |
/* reset soft MMU for next block (it can currently
|
629 |
only be set by a memory fault) */
|
630 |
} /* for(;;) */
|
631 |
} |
632 |
} /* for(;;) */
|
633 |
|
634 |
|
635 |
#if defined(TARGET_I386)
|
636 |
/* restore flags in standard format */
|
637 |
env->eflags = env->eflags | helper_cc_compute_all(CC_OP) | (DF & DF_MASK); |
638 |
#elif defined(TARGET_ARM)
|
639 |
/* XXX: Save/restore host fpu exception state?. */
|
640 |
#elif defined(TARGET_SPARC)
|
641 |
#elif defined(TARGET_PPC)
|
642 |
#elif defined(TARGET_LM32)
|
643 |
#elif defined(TARGET_M68K)
|
644 |
cpu_m68k_flush_flags(env, env->cc_op); |
645 |
env->cc_op = CC_OP_FLAGS; |
646 |
env->sr = (env->sr & 0xffe0)
|
647 |
| env->cc_dest | (env->cc_x << 4);
|
648 |
#elif defined(TARGET_MICROBLAZE)
|
649 |
#elif defined(TARGET_MIPS)
|
650 |
#elif defined(TARGET_SH4)
|
651 |
#elif defined(TARGET_ALPHA)
|
652 |
#elif defined(TARGET_CRIS)
|
653 |
#elif defined(TARGET_S390X)
|
654 |
/* XXXXX */
|
655 |
#else
|
656 |
#error unsupported target CPU
|
657 |
#endif
|
658 |
|
659 |
/* restore global registers */
|
660 |
barrier(); |
661 |
env = (void *) saved_env_reg;
|
662 |
|
663 |
/* fail safe : never use cpu_single_env outside cpu_exec() */
|
664 |
cpu_single_env = NULL;
|
665 |
return ret;
|
666 |
} |
667 |
|
668 |
/* must only be called from the generated code as an exception can be
|
669 |
generated */
|
670 |
void tb_invalidate_page_range(target_ulong start, target_ulong end)
|
671 |
{ |
672 |
/* XXX: cannot enable it yet because it yields to MMU exception
|
673 |
where NIP != read address on PowerPC */
|
674 |
#if 0
|
675 |
target_ulong phys_addr;
|
676 |
phys_addr = get_phys_addr_code(env, start);
|
677 |
tb_invalidate_phys_page_range(phys_addr, phys_addr + end - start, 0);
|
678 |
#endif
|
679 |
} |
680 |
|
681 |
#if defined(TARGET_I386) && defined(CONFIG_USER_ONLY)
|
682 |
|
683 |
void cpu_x86_load_seg(CPUX86State *s, int seg_reg, int selector) |
684 |
{ |
685 |
CPUX86State *saved_env; |
686 |
|
687 |
saved_env = env; |
688 |
env = s; |
689 |
if (!(env->cr[0] & CR0_PE_MASK) || (env->eflags & VM_MASK)) { |
690 |
selector &= 0xffff;
|
691 |
cpu_x86_load_seg_cache(env, seg_reg, selector, |
692 |
(selector << 4), 0xffff, 0); |
693 |
} else {
|
694 |
helper_load_seg(seg_reg, selector); |
695 |
} |
696 |
env = saved_env; |
697 |
} |
698 |
|
699 |
void cpu_x86_fsave(CPUX86State *s, target_ulong ptr, int data32) |
700 |
{ |
701 |
CPUX86State *saved_env; |
702 |
|
703 |
saved_env = env; |
704 |
env = s; |
705 |
|
706 |
helper_fsave(ptr, data32); |
707 |
|
708 |
env = saved_env; |
709 |
} |
710 |
|
711 |
void cpu_x86_frstor(CPUX86State *s, target_ulong ptr, int data32) |
712 |
{ |
713 |
CPUX86State *saved_env; |
714 |
|
715 |
saved_env = env; |
716 |
env = s; |
717 |
|
718 |
helper_frstor(ptr, data32); |
719 |
|
720 |
env = saved_env; |
721 |
} |
722 |
|
723 |
#endif /* TARGET_I386 */ |
724 |
|
725 |
#if !defined(CONFIG_SOFTMMU)
|
726 |
|
727 |
#if defined(TARGET_I386)
|
728 |
#define EXCEPTION_ACTION raise_exception_err(env->exception_index, env->error_code)
|
729 |
#else
|
730 |
#define EXCEPTION_ACTION cpu_loop_exit()
|
731 |
#endif
|
732 |
|
733 |
/* 'pc' is the host PC at which the exception was raised. 'address' is
|
734 |
the effective address of the memory exception. 'is_write' is 1 if a
|
735 |
write caused the exception and otherwise 0'. 'old_set' is the
|
736 |
signal set which should be restored */
|
737 |
static inline int handle_cpu_signal(unsigned long pc, unsigned long address, |
738 |
int is_write, sigset_t *old_set,
|
739 |
void *puc)
|
740 |
{ |
741 |
TranslationBlock *tb; |
742 |
int ret;
|
743 |
|
744 |
if (cpu_single_env)
|
745 |
env = cpu_single_env; /* XXX: find a correct solution for multithread */
|
746 |
#if defined(DEBUG_SIGNAL)
|
747 |
qemu_printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
|
748 |
pc, address, is_write, *(unsigned long *)old_set); |
749 |
#endif
|
750 |
/* XXX: locking issue */
|
751 |
if (is_write && page_unprotect(h2g(address), pc, puc)) {
|
752 |
return 1; |
753 |
} |
754 |
|
755 |
/* see if it is an MMU fault */
|
756 |
ret = cpu_handle_mmu_fault(env, address, is_write, MMU_USER_IDX, 0);
|
757 |
if (ret < 0) |
758 |
return 0; /* not an MMU fault */ |
759 |
if (ret == 0) |
760 |
return 1; /* the MMU fault was handled without causing real CPU fault */ |
761 |
/* now we have a real cpu fault */
|
762 |
tb = tb_find_pc(pc); |
763 |
if (tb) {
|
764 |
/* the PC is inside the translated code. It means that we have
|
765 |
a virtual CPU fault */
|
766 |
cpu_restore_state(tb, env, pc, puc); |
767 |
} |
768 |
|
769 |
/* we restore the process signal mask as the sigreturn should
|
770 |
do it (XXX: use sigsetjmp) */
|
771 |
sigprocmask(SIG_SETMASK, old_set, NULL);
|
772 |
EXCEPTION_ACTION; |
773 |
|
774 |
/* never comes here */
|
775 |
return 1; |
776 |
} |
777 |
|
778 |
#if defined(__i386__)
|
779 |
|
780 |
#if defined(__APPLE__)
|
781 |
# include <sys/ucontext.h> |
782 |
|
783 |
# define EIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->ss.eip)) |
784 |
# define TRAP_sig(context) ((context)->uc_mcontext->es.trapno)
|
785 |
# define ERROR_sig(context) ((context)->uc_mcontext->es.err)
|
786 |
# define MASK_sig(context) ((context)->uc_sigmask)
|
787 |
#elif defined (__NetBSD__)
|
788 |
# include <ucontext.h> |
789 |
|
790 |
# define EIP_sig(context) ((context)->uc_mcontext.__gregs[_REG_EIP])
|
791 |
# define TRAP_sig(context) ((context)->uc_mcontext.__gregs[_REG_TRAPNO])
|
792 |
# define ERROR_sig(context) ((context)->uc_mcontext.__gregs[_REG_ERR])
|
793 |
# define MASK_sig(context) ((context)->uc_sigmask)
|
794 |
#elif defined (__FreeBSD__) || defined(__DragonFly__)
|
795 |
# include <ucontext.h> |
796 |
|
797 |
# define EIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext.mc_eip)) |
798 |
# define TRAP_sig(context) ((context)->uc_mcontext.mc_trapno)
|
799 |
# define ERROR_sig(context) ((context)->uc_mcontext.mc_err)
|
800 |
# define MASK_sig(context) ((context)->uc_sigmask)
|
801 |
#elif defined(__OpenBSD__)
|
802 |
# define EIP_sig(context) ((context)->sc_eip)
|
803 |
# define TRAP_sig(context) ((context)->sc_trapno)
|
804 |
# define ERROR_sig(context) ((context)->sc_err)
|
805 |
# define MASK_sig(context) ((context)->sc_mask)
|
806 |
#else
|
807 |
# define EIP_sig(context) ((context)->uc_mcontext.gregs[REG_EIP])
|
808 |
# define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO])
|
809 |
# define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR])
|
810 |
# define MASK_sig(context) ((context)->uc_sigmask)
|
811 |
#endif
|
812 |
|
813 |
int cpu_signal_handler(int host_signum, void *pinfo, |
814 |
void *puc)
|
815 |
{ |
816 |
siginfo_t *info = pinfo; |
817 |
#if defined(__NetBSD__) || defined (__FreeBSD__) || defined(__DragonFly__)
|
818 |
ucontext_t *uc = puc; |
819 |
#elif defined(__OpenBSD__)
|
820 |
struct sigcontext *uc = puc;
|
821 |
#else
|
822 |
struct ucontext *uc = puc;
|
823 |
#endif
|
824 |
unsigned long pc; |
825 |
int trapno;
|
826 |
|
827 |
#ifndef REG_EIP
|
828 |
/* for glibc 2.1 */
|
829 |
#define REG_EIP EIP
|
830 |
#define REG_ERR ERR
|
831 |
#define REG_TRAPNO TRAPNO
|
832 |
#endif
|
833 |
pc = EIP_sig(uc); |
834 |
trapno = TRAP_sig(uc); |
835 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
836 |
trapno == 0xe ?
|
837 |
(ERROR_sig(uc) >> 1) & 1 : 0, |
838 |
&MASK_sig(uc), puc); |
839 |
} |
840 |
|
841 |
#elif defined(__x86_64__)
|
842 |
|
843 |
#ifdef __NetBSD__
|
844 |
#define PC_sig(context) _UC_MACHINE_PC(context)
|
845 |
#define TRAP_sig(context) ((context)->uc_mcontext.__gregs[_REG_TRAPNO])
|
846 |
#define ERROR_sig(context) ((context)->uc_mcontext.__gregs[_REG_ERR])
|
847 |
#define MASK_sig(context) ((context)->uc_sigmask)
|
848 |
#elif defined(__OpenBSD__)
|
849 |
#define PC_sig(context) ((context)->sc_rip)
|
850 |
#define TRAP_sig(context) ((context)->sc_trapno)
|
851 |
#define ERROR_sig(context) ((context)->sc_err)
|
852 |
#define MASK_sig(context) ((context)->sc_mask)
|
853 |
#elif defined (__FreeBSD__) || defined(__DragonFly__)
|
854 |
#include <ucontext.h> |
855 |
|
856 |
#define PC_sig(context) (*((unsigned long*)&(context)->uc_mcontext.mc_rip)) |
857 |
#define TRAP_sig(context) ((context)->uc_mcontext.mc_trapno)
|
858 |
#define ERROR_sig(context) ((context)->uc_mcontext.mc_err)
|
859 |
#define MASK_sig(context) ((context)->uc_sigmask)
|
860 |
#else
|
861 |
#define PC_sig(context) ((context)->uc_mcontext.gregs[REG_RIP])
|
862 |
#define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO])
|
863 |
#define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR])
|
864 |
#define MASK_sig(context) ((context)->uc_sigmask)
|
865 |
#endif
|
866 |
|
867 |
int cpu_signal_handler(int host_signum, void *pinfo, |
868 |
void *puc)
|
869 |
{ |
870 |
siginfo_t *info = pinfo; |
871 |
unsigned long pc; |
872 |
#if defined(__NetBSD__) || defined (__FreeBSD__) || defined(__DragonFly__)
|
873 |
ucontext_t *uc = puc; |
874 |
#elif defined(__OpenBSD__)
|
875 |
struct sigcontext *uc = puc;
|
876 |
#else
|
877 |
struct ucontext *uc = puc;
|
878 |
#endif
|
879 |
|
880 |
pc = PC_sig(uc); |
881 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
882 |
TRAP_sig(uc) == 0xe ?
|
883 |
(ERROR_sig(uc) >> 1) & 1 : 0, |
884 |
&MASK_sig(uc), puc); |
885 |
} |
886 |
|
887 |
#elif defined(_ARCH_PPC)
|
888 |
|
889 |
/***********************************************************************
|
890 |
* signal context platform-specific definitions
|
891 |
* From Wine
|
892 |
*/
|
893 |
#ifdef linux
|
894 |
/* All Registers access - only for local access */
|
895 |
# define REG_sig(reg_name, context) ((context)->uc_mcontext.regs->reg_name)
|
896 |
/* Gpr Registers access */
|
897 |
# define GPR_sig(reg_num, context) REG_sig(gpr[reg_num], context)
|
898 |
# define IAR_sig(context) REG_sig(nip, context) /* Program counter */ |
899 |
# define MSR_sig(context) REG_sig(msr, context) /* Machine State Register (Supervisor) */ |
900 |
# define CTR_sig(context) REG_sig(ctr, context) /* Count register */ |
901 |
# define XER_sig(context) REG_sig(xer, context) /* User's integer exception register */ |
902 |
# define LR_sig(context) REG_sig(link, context) /* Link register */ |
903 |
# define CR_sig(context) REG_sig(ccr, context) /* Condition register */ |
904 |
/* Float Registers access */
|
905 |
# define FLOAT_sig(reg_num, context) (((double*)((char*)((context)->uc_mcontext.regs+48*4)))[reg_num]) |
906 |
# define FPSCR_sig(context) (*(int*)((char*)((context)->uc_mcontext.regs+(48+32*2)*4))) |
907 |
/* Exception Registers access */
|
908 |
# define DAR_sig(context) REG_sig(dar, context)
|
909 |
# define DSISR_sig(context) REG_sig(dsisr, context)
|
910 |
# define TRAP_sig(context) REG_sig(trap, context)
|
911 |
#endif /* linux */ |
912 |
|
913 |
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
|
914 |
#include <ucontext.h> |
915 |
# define IAR_sig(context) ((context)->uc_mcontext.mc_srr0)
|
916 |
# define MSR_sig(context) ((context)->uc_mcontext.mc_srr1)
|
917 |
# define CTR_sig(context) ((context)->uc_mcontext.mc_ctr)
|
918 |
# define XER_sig(context) ((context)->uc_mcontext.mc_xer)
|
919 |
# define LR_sig(context) ((context)->uc_mcontext.mc_lr)
|
920 |
# define CR_sig(context) ((context)->uc_mcontext.mc_cr)
|
921 |
/* Exception Registers access */
|
922 |
# define DAR_sig(context) ((context)->uc_mcontext.mc_dar)
|
923 |
# define DSISR_sig(context) ((context)->uc_mcontext.mc_dsisr)
|
924 |
# define TRAP_sig(context) ((context)->uc_mcontext.mc_exc)
|
925 |
#endif /* __FreeBSD__|| __FreeBSD_kernel__ */ |
926 |
|
927 |
#ifdef __APPLE__
|
928 |
# include <sys/ucontext.h> |
929 |
typedef struct ucontext SIGCONTEXT; |
930 |
/* All Registers access - only for local access */
|
931 |
# define REG_sig(reg_name, context) ((context)->uc_mcontext->ss.reg_name)
|
932 |
# define FLOATREG_sig(reg_name, context) ((context)->uc_mcontext->fs.reg_name)
|
933 |
# define EXCEPREG_sig(reg_name, context) ((context)->uc_mcontext->es.reg_name)
|
934 |
# define VECREG_sig(reg_name, context) ((context)->uc_mcontext->vs.reg_name)
|
935 |
/* Gpr Registers access */
|
936 |
# define GPR_sig(reg_num, context) REG_sig(r##reg_num, context) |
937 |
# define IAR_sig(context) REG_sig(srr0, context) /* Program counter */ |
938 |
# define MSR_sig(context) REG_sig(srr1, context) /* Machine State Register (Supervisor) */ |
939 |
# define CTR_sig(context) REG_sig(ctr, context)
|
940 |
# define XER_sig(context) REG_sig(xer, context) /* Link register */ |
941 |
# define LR_sig(context) REG_sig(lr, context) /* User's integer exception register */ |
942 |
# define CR_sig(context) REG_sig(cr, context) /* Condition register */ |
943 |
/* Float Registers access */
|
944 |
# define FLOAT_sig(reg_num, context) FLOATREG_sig(fpregs[reg_num], context)
|
945 |
# define FPSCR_sig(context) ((double)FLOATREG_sig(fpscr, context)) |
946 |
/* Exception Registers access */
|
947 |
# define DAR_sig(context) EXCEPREG_sig(dar, context) /* Fault registers for coredump */ |
948 |
# define DSISR_sig(context) EXCEPREG_sig(dsisr, context)
|
949 |
# define TRAP_sig(context) EXCEPREG_sig(exception, context) /* number of powerpc exception taken */ |
950 |
#endif /* __APPLE__ */ |
951 |
|
952 |
int cpu_signal_handler(int host_signum, void *pinfo, |
953 |
void *puc)
|
954 |
{ |
955 |
siginfo_t *info = pinfo; |
956 |
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
|
957 |
ucontext_t *uc = puc; |
958 |
#else
|
959 |
struct ucontext *uc = puc;
|
960 |
#endif
|
961 |
unsigned long pc; |
962 |
int is_write;
|
963 |
|
964 |
pc = IAR_sig(uc); |
965 |
is_write = 0;
|
966 |
#if 0
|
967 |
/* ppc 4xx case */
|
968 |
if (DSISR_sig(uc) & 0x00800000)
|
969 |
is_write = 1;
|
970 |
#else
|
971 |
if (TRAP_sig(uc) != 0x400 && (DSISR_sig(uc) & 0x02000000)) |
972 |
is_write = 1;
|
973 |
#endif
|
974 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
975 |
is_write, &uc->uc_sigmask, puc); |
976 |
} |
977 |
|
978 |
#elif defined(__alpha__)
|
979 |
|
980 |
int cpu_signal_handler(int host_signum, void *pinfo, |
981 |
void *puc)
|
982 |
{ |
983 |
siginfo_t *info = pinfo; |
984 |
struct ucontext *uc = puc;
|
985 |
uint32_t *pc = uc->uc_mcontext.sc_pc; |
986 |
uint32_t insn = *pc; |
987 |
int is_write = 0; |
988 |
|
989 |
/* XXX: need kernel patch to get write flag faster */
|
990 |
switch (insn >> 26) { |
991 |
case 0x0d: // stw |
992 |
case 0x0e: // stb |
993 |
case 0x0f: // stq_u |
994 |
case 0x24: // stf |
995 |
case 0x25: // stg |
996 |
case 0x26: // sts |
997 |
case 0x27: // stt |
998 |
case 0x2c: // stl |
999 |
case 0x2d: // stq |
1000 |
case 0x2e: // stl_c |
1001 |
case 0x2f: // stq_c |
1002 |
is_write = 1;
|
1003 |
} |
1004 |
|
1005 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
1006 |
is_write, &uc->uc_sigmask, puc); |
1007 |
} |
1008 |
#elif defined(__sparc__)
|
1009 |
|
1010 |
int cpu_signal_handler(int host_signum, void *pinfo, |
1011 |
void *puc)
|
1012 |
{ |
1013 |
siginfo_t *info = pinfo; |
1014 |
int is_write;
|
1015 |
uint32_t insn; |
1016 |
#if !defined(__arch64__) || defined(CONFIG_SOLARIS)
|
1017 |
uint32_t *regs = (uint32_t *)(info + 1);
|
1018 |
void *sigmask = (regs + 20); |
1019 |
/* XXX: is there a standard glibc define ? */
|
1020 |
unsigned long pc = regs[1]; |
1021 |
#else
|
1022 |
#ifdef __linux__
|
1023 |
struct sigcontext *sc = puc;
|
1024 |
unsigned long pc = sc->sigc_regs.tpc; |
1025 |
void *sigmask = (void *)sc->sigc_mask; |
1026 |
#elif defined(__OpenBSD__)
|
1027 |
struct sigcontext *uc = puc;
|
1028 |
unsigned long pc = uc->sc_pc; |
1029 |
void *sigmask = (void *)(long)uc->sc_mask; |
1030 |
#endif
|
1031 |
#endif
|
1032 |
|
1033 |
/* XXX: need kernel patch to get write flag faster */
|
1034 |
is_write = 0;
|
1035 |
insn = *(uint32_t *)pc; |
1036 |
if ((insn >> 30) == 3) { |
1037 |
switch((insn >> 19) & 0x3f) { |
1038 |
case 0x05: // stb |
1039 |
case 0x15: // stba |
1040 |
case 0x06: // sth |
1041 |
case 0x16: // stha |
1042 |
case 0x04: // st |
1043 |
case 0x14: // sta |
1044 |
case 0x07: // std |
1045 |
case 0x17: // stda |
1046 |
case 0x0e: // stx |
1047 |
case 0x1e: // stxa |
1048 |
case 0x24: // stf |
1049 |
case 0x34: // stfa |
1050 |
case 0x27: // stdf |
1051 |
case 0x37: // stdfa |
1052 |
case 0x26: // stqf |
1053 |
case 0x36: // stqfa |
1054 |
case 0x25: // stfsr |
1055 |
case 0x3c: // casa |
1056 |
case 0x3e: // casxa |
1057 |
is_write = 1;
|
1058 |
break;
|
1059 |
} |
1060 |
} |
1061 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
1062 |
is_write, sigmask, NULL);
|
1063 |
} |
1064 |
|
1065 |
#elif defined(__arm__)
|
1066 |
|
1067 |
int cpu_signal_handler(int host_signum, void *pinfo, |
1068 |
void *puc)
|
1069 |
{ |
1070 |
siginfo_t *info = pinfo; |
1071 |
struct ucontext *uc = puc;
|
1072 |
unsigned long pc; |
1073 |
int is_write;
|
1074 |
|
1075 |
#if (__GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ <= 3)) |
1076 |
pc = uc->uc_mcontext.gregs[R15]; |
1077 |
#else
|
1078 |
pc = uc->uc_mcontext.arm_pc; |
1079 |
#endif
|
1080 |
/* XXX: compute is_write */
|
1081 |
is_write = 0;
|
1082 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
1083 |
is_write, |
1084 |
&uc->uc_sigmask, puc); |
1085 |
} |
1086 |
|
1087 |
#elif defined(__mc68000)
|
1088 |
|
1089 |
int cpu_signal_handler(int host_signum, void *pinfo, |
1090 |
void *puc)
|
1091 |
{ |
1092 |
siginfo_t *info = pinfo; |
1093 |
struct ucontext *uc = puc;
|
1094 |
unsigned long pc; |
1095 |
int is_write;
|
1096 |
|
1097 |
pc = uc->uc_mcontext.gregs[16];
|
1098 |
/* XXX: compute is_write */
|
1099 |
is_write = 0;
|
1100 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
1101 |
is_write, |
1102 |
&uc->uc_sigmask, puc); |
1103 |
} |
1104 |
|
1105 |
#elif defined(__ia64)
|
1106 |
|
1107 |
#ifndef __ISR_VALID
|
1108 |
/* This ought to be in <bits/siginfo.h>... */
|
1109 |
# define __ISR_VALID 1 |
1110 |
#endif
|
1111 |
|
1112 |
int cpu_signal_handler(int host_signum, void *pinfo, void *puc) |
1113 |
{ |
1114 |
siginfo_t *info = pinfo; |
1115 |
struct ucontext *uc = puc;
|
1116 |
unsigned long ip; |
1117 |
int is_write = 0; |
1118 |
|
1119 |
ip = uc->uc_mcontext.sc_ip; |
1120 |
switch (host_signum) {
|
1121 |
case SIGILL:
|
1122 |
case SIGFPE:
|
1123 |
case SIGSEGV:
|
1124 |
case SIGBUS:
|
1125 |
case SIGTRAP:
|
1126 |
if (info->si_code && (info->si_segvflags & __ISR_VALID))
|
1127 |
/* ISR.W (write-access) is bit 33: */
|
1128 |
is_write = (info->si_isr >> 33) & 1; |
1129 |
break;
|
1130 |
|
1131 |
default:
|
1132 |
break;
|
1133 |
} |
1134 |
return handle_cpu_signal(ip, (unsigned long)info->si_addr, |
1135 |
is_write, |
1136 |
(sigset_t *)&uc->uc_sigmask, puc); |
1137 |
} |
1138 |
|
1139 |
#elif defined(__s390__)
|
1140 |
|
1141 |
int cpu_signal_handler(int host_signum, void *pinfo, |
1142 |
void *puc)
|
1143 |
{ |
1144 |
siginfo_t *info = pinfo; |
1145 |
struct ucontext *uc = puc;
|
1146 |
unsigned long pc; |
1147 |
uint16_t *pinsn; |
1148 |
int is_write = 0; |
1149 |
|
1150 |
pc = uc->uc_mcontext.psw.addr; |
1151 |
|
1152 |
/* ??? On linux, the non-rt signal handler has 4 (!) arguments instead
|
1153 |
of the normal 2 arguments. The 3rd argument contains the "int_code"
|
1154 |
from the hardware which does in fact contain the is_write value.
|
1155 |
The rt signal handler, as far as I can tell, does not give this value
|
1156 |
at all. Not that we could get to it from here even if it were. */
|
1157 |
/* ??? This is not even close to complete, since it ignores all
|
1158 |
of the read-modify-write instructions. */
|
1159 |
pinsn = (uint16_t *)pc; |
1160 |
switch (pinsn[0] >> 8) { |
1161 |
case 0x50: /* ST */ |
1162 |
case 0x42: /* STC */ |
1163 |
case 0x40: /* STH */ |
1164 |
is_write = 1;
|
1165 |
break;
|
1166 |
case 0xc4: /* RIL format insns */ |
1167 |
switch (pinsn[0] & 0xf) { |
1168 |
case 0xf: /* STRL */ |
1169 |
case 0xb: /* STGRL */ |
1170 |
case 0x7: /* STHRL */ |
1171 |
is_write = 1;
|
1172 |
} |
1173 |
break;
|
1174 |
case 0xe3: /* RXY format insns */ |
1175 |
switch (pinsn[2] & 0xff) { |
1176 |
case 0x50: /* STY */ |
1177 |
case 0x24: /* STG */ |
1178 |
case 0x72: /* STCY */ |
1179 |
case 0x70: /* STHY */ |
1180 |
case 0x8e: /* STPQ */ |
1181 |
case 0x3f: /* STRVH */ |
1182 |
case 0x3e: /* STRV */ |
1183 |
case 0x2f: /* STRVG */ |
1184 |
is_write = 1;
|
1185 |
} |
1186 |
break;
|
1187 |
} |
1188 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
1189 |
is_write, &uc->uc_sigmask, puc); |
1190 |
} |
1191 |
|
1192 |
#elif defined(__mips__)
|
1193 |
|
1194 |
int cpu_signal_handler(int host_signum, void *pinfo, |
1195 |
void *puc)
|
1196 |
{ |
1197 |
siginfo_t *info = pinfo; |
1198 |
struct ucontext *uc = puc;
|
1199 |
greg_t pc = uc->uc_mcontext.pc; |
1200 |
int is_write;
|
1201 |
|
1202 |
/* XXX: compute is_write */
|
1203 |
is_write = 0;
|
1204 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
1205 |
is_write, &uc->uc_sigmask, puc); |
1206 |
} |
1207 |
|
1208 |
#elif defined(__hppa__)
|
1209 |
|
1210 |
int cpu_signal_handler(int host_signum, void *pinfo, |
1211 |
void *puc)
|
1212 |
{ |
1213 |
struct siginfo *info = pinfo;
|
1214 |
struct ucontext *uc = puc;
|
1215 |
unsigned long pc = uc->uc_mcontext.sc_iaoq[0]; |
1216 |
uint32_t insn = *(uint32_t *)pc; |
1217 |
int is_write = 0; |
1218 |
|
1219 |
/* XXX: need kernel patch to get write flag faster. */
|
1220 |
switch (insn >> 26) { |
1221 |
case 0x1a: /* STW */ |
1222 |
case 0x19: /* STH */ |
1223 |
case 0x18: /* STB */ |
1224 |
case 0x1b: /* STWM */ |
1225 |
is_write = 1;
|
1226 |
break;
|
1227 |
|
1228 |
case 0x09: /* CSTWX, FSTWX, FSTWS */ |
1229 |
case 0x0b: /* CSTDX, FSTDX, FSTDS */ |
1230 |
/* Distinguish from coprocessor load ... */
|
1231 |
is_write = (insn >> 9) & 1; |
1232 |
break;
|
1233 |
|
1234 |
case 0x03: |
1235 |
switch ((insn >> 6) & 15) { |
1236 |
case 0xa: /* STWS */ |
1237 |
case 0x9: /* STHS */ |
1238 |
case 0x8: /* STBS */ |
1239 |
case 0xe: /* STWAS */ |
1240 |
case 0xc: /* STBYS */ |
1241 |
is_write = 1;
|
1242 |
} |
1243 |
break;
|
1244 |
} |
1245 |
|
1246 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
1247 |
is_write, &uc->uc_sigmask, puc); |
1248 |
} |
1249 |
|
1250 |
#else
|
1251 |
|
1252 |
#error host CPU specific signal handler needed
|
1253 |
|
1254 |
#endif
|
1255 |
|
1256 |
#endif /* !defined(CONFIG_SOFTMMU) */ |