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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, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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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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#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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#include <sys/ucontext.h> |
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#endif
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int tb_invalidated_flag;
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//#define DEBUG_EXEC
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//#define DEBUG_SIGNAL
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#define SAVE_GLOBALS()
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#define RESTORE_GLOBALS()
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#if defined(__sparc__) && !defined(HOST_SOLARIS)
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#include <features.h> |
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#if defined(__GLIBC__) && ((__GLIBC__ < 2) || \ |
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((__GLIBC__ == 2) && (__GLIBC_MINOR__ <= 90))) |
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// Work around ugly bugs in glibc that mangle global register contents
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static volatile void *saved_env; |
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static volatile unsigned long saved_t0, saved_i7; |
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#undef SAVE_GLOBALS
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#define SAVE_GLOBALS() do { \ |
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saved_env = env; \ |
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saved_t0 = T0; \ |
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asm volatile ("st %%i7, [%0]" : : "r" (&saved_i7)); \ |
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} while(0) |
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#undef RESTORE_GLOBALS
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#define RESTORE_GLOBALS() do { \ |
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env = (void *)saved_env; \
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T0 = saved_t0; \ |
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asm volatile ("ld [%0], %%i7" : : "r" (&saved_i7)); \ |
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} while(0) |
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static int sparc_setjmp(jmp_buf buf) |
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{ |
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int ret;
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SAVE_GLOBALS(); |
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ret = setjmp(buf); |
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RESTORE_GLOBALS(); |
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return ret;
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} |
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#undef setjmp
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#define setjmp(jmp_buf) sparc_setjmp(jmp_buf)
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static void sparc_longjmp(jmp_buf buf, int val) |
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{ |
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SAVE_GLOBALS(); |
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longjmp(buf, val); |
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} |
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#define longjmp(jmp_buf, val) sparc_longjmp(jmp_buf, val)
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#endif
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#endif
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void cpu_loop_exit(void) |
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{ |
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/* NOTE: the register at this point must be saved by hand because
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longjmp restore them */
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regs_to_env(); |
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longjmp(env->jmp_env, 1);
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} |
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#if !(defined(TARGET_SPARC) || defined(TARGET_SH4) || defined(TARGET_M68K))
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#define reg_T2
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#endif
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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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struct ucontext *uc = puc;
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#endif
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env = env1; |
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/* XXX: restore cpu registers saved in host registers */
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#if !defined(CONFIG_SOFTMMU)
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if (puc) {
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/* XXX: use siglongjmp ? */
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sigprocmask(SIG_SETMASK, &uc->uc_sigmask, NULL);
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} |
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#endif
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longjmp(env->jmp_env, 1);
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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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int code_gen_size;
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unsigned int h; |
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target_ulong phys_pc, phys_page1, phys_page2, virt_page2; |
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uint8_t *tc_ptr; |
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spin_lock(&tb_lock); |
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tb_invalidated_flag = 0;
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regs_to_env(); /* XXX: do it just before cpu_gen_code() */
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/* find translated block using physical mappings */
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phys_pc = get_phys_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_phys_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_alloc(pc); |
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if (!tb) {
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/* flush must be done */
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tb_flush(env); |
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/* cannot fail at this point */
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tb = tb_alloc(pc); |
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/* don't forget to invalidate previous TB info */
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tb_invalidated_flag = 1;
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} |
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tc_ptr = code_gen_ptr; |
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tb->tc_ptr = tc_ptr; |
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tb->cs_base = cs_base; |
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tb->flags = flags; |
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SAVE_GLOBALS(); |
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cpu_gen_code(env, tb, &code_gen_size); |
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RESTORE_GLOBALS(); |
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code_gen_ptr = (void *)(((unsigned long)code_gen_ptr + code_gen_size + CODE_GEN_ALIGN - 1) & ~(CODE_GEN_ALIGN - 1)); |
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/* check next page if needed */
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virt_page2 = (pc + tb->size - 1) & TARGET_PAGE_MASK;
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phys_page2 = -1;
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if ((pc & TARGET_PAGE_MASK) != virt_page2) {
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phys_page2 = get_phys_addr_code(env, virt_page2); |
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} |
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tb_link_phys(tb, phys_pc, phys_page2); |
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found:
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/* we add the TB in the virtual pc hash table */
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env->tb_jmp_cache[tb_jmp_cache_hash_func(pc)] = tb; |
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spin_unlock(&tb_lock); |
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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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uint64_t 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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#if defined(TARGET_I386)
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flags = env->hflags; |
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flags |= (env->eflags & (IOPL_MASK | TF_MASK | VM_MASK)); |
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flags |= env->intercept; |
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cs_base = env->segs[R_CS].base; |
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pc = cs_base + env->eip; |
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#elif defined(TARGET_ARM)
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flags = env->thumb | (env->vfp.vec_len << 1)
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| (env->vfp.vec_stride << 4);
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if ((env->uncached_cpsr & CPSR_M) != ARM_CPU_MODE_USR)
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flags |= (1 << 6); |
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if (env->vfp.xregs[ARM_VFP_FPEXC] & (1 << 30)) |
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flags |= (1 << 7); |
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flags |= (env->condexec_bits << 8);
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cs_base = 0;
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pc = env->regs[15];
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#elif defined(TARGET_SPARC)
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#ifdef TARGET_SPARC64
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// Combined FPU enable bits . PRIV . DMMU enabled . IMMU enabled
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flags = (((env->pstate & PS_PEF) >> 1) | ((env->fprs & FPRS_FEF) << 2)) |
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| (env->pstate & PS_PRIV) | ((env->lsu & (DMMU_E | IMMU_E)) >> 2);
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#else
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// FPU enable . Supervisor
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flags = (env->psref << 4) | env->psrs;
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#endif
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cs_base = env->npc; |
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pc = env->pc; |
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#elif defined(TARGET_PPC)
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flags = env->hflags; |
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cs_base = 0;
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pc = env->nip; |
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#elif defined(TARGET_MIPS)
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flags = env->hflags & (MIPS_HFLAG_TMASK | MIPS_HFLAG_BMASK); |
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cs_base = 0;
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pc = env->PC[env->current_tc]; |
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#elif defined(TARGET_M68K)
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flags = (env->fpcr & M68K_FPCR_PREC) /* Bit 6 */
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| (env->sr & SR_S) /* Bit 13 */
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| ((env->macsr >> 4) & 0xf); /* Bits 0-3 */ |
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cs_base = 0;
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pc = env->pc; |
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#elif defined(TARGET_SH4)
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flags = env->flags; |
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cs_base = 0;
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pc = env->pc; |
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#elif defined(TARGET_ALPHA)
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flags = env->ps; |
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cs_base = 0;
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pc = env->pc; |
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#elif defined(TARGET_CRIS)
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flags = 0;
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cs_base = 0;
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pc = env->pc; |
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#else
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#error unsupported CPU
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#endif
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tb = env->tb_jmp_cache[tb_jmp_cache_hash_func(pc)]; |
267 |
if (__builtin_expect(!tb || tb->pc != pc || tb->cs_base != cs_base ||
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tb->flags != flags, 0)) {
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tb = tb_find_slow(pc, cs_base, flags); |
270 |
/* Note: we do it here to avoid a gcc bug on Mac OS X when
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doing it in tb_find_slow */
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if (tb_invalidated_flag) {
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/* as some TB could have been invalidated because
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of memory exceptions while generating the code, we
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must recompute the hash index here */
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T0 = 0;
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} |
278 |
} |
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return tb;
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} |
281 |
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#define BREAK_CHAIN T0 = 0 |
283 |
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/* main execution loop */
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int cpu_exec(CPUState *env1)
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{ |
288 |
#define DECLARE_HOST_REGS 1 |
289 |
#include "hostregs_helper.h" |
290 |
#if defined(TARGET_SPARC)
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#if defined(reg_REGWPTR)
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uint32_t *saved_regwptr; |
293 |
#endif
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#endif
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int ret, interrupt_request;
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long (*gen_func)(void); |
297 |
TranslationBlock *tb; |
298 |
uint8_t *tc_ptr; |
299 |
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if (cpu_halted(env1) == EXCP_HALTED)
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return EXCP_HALTED;
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cpu_single_env = env1; |
304 |
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/* first we save global registers */
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#define SAVE_HOST_REGS 1 |
307 |
#include "hostregs_helper.h" |
308 |
env = env1; |
309 |
SAVE_GLOBALS(); |
310 |
|
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env_to_regs(); |
312 |
#if defined(TARGET_I386)
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313 |
/* 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); |
315 |
DF = 1 - (2 * ((env->eflags >> 10) & 1)); |
316 |
CC_OP = CC_OP_EFLAGS; |
317 |
env->eflags &= ~(DF_MASK | CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C); |
318 |
#elif defined(TARGET_SPARC)
|
319 |
#if defined(reg_REGWPTR)
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320 |
saved_regwptr = REGWPTR; |
321 |
#endif
|
322 |
#elif defined(TARGET_M68K)
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323 |
env->cc_op = CC_OP_FLAGS; |
324 |
env->cc_dest = env->sr & 0xf;
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env->cc_x = (env->sr >> 4) & 1; |
326 |
#elif defined(TARGET_ALPHA)
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327 |
#elif defined(TARGET_ARM)
|
328 |
#elif defined(TARGET_PPC)
|
329 |
#elif defined(TARGET_MIPS)
|
330 |
#elif defined(TARGET_SH4)
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331 |
#elif defined(TARGET_CRIS)
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332 |
/* XXXXX */
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333 |
#else
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334 |
#error unsupported target CPU
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335 |
#endif
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336 |
env->exception_index = -1;
|
337 |
|
338 |
/* prepare setjmp context for exception handling */
|
339 |
for(;;) {
|
340 |
if (setjmp(env->jmp_env) == 0) { |
341 |
env->current_tb = NULL;
|
342 |
/* if an exception is pending, we execute it here */
|
343 |
if (env->exception_index >= 0) { |
344 |
if (env->exception_index >= EXCP_INTERRUPT) {
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345 |
/* exit request from the cpu execution loop */
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ret = env->exception_index; |
347 |
break;
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348 |
} else if (env->user_mode_only) { |
349 |
/* if user mode only, we simulate a fake exception
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350 |
which will be handled outside the cpu execution
|
351 |
loop */
|
352 |
#if defined(TARGET_I386)
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353 |
do_interrupt_user(env->exception_index, |
354 |
env->exception_is_int, |
355 |
env->error_code, |
356 |
env->exception_next_eip); |
357 |
#endif
|
358 |
ret = env->exception_index; |
359 |
break;
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360 |
} else {
|
361 |
#if defined(TARGET_I386)
|
362 |
/* simulate a real cpu exception. On i386, it can
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363 |
trigger new exceptions, but we do not handle
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364 |
double or triple faults yet. */
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365 |
do_interrupt(env->exception_index, |
366 |
env->exception_is_int, |
367 |
env->error_code, |
368 |
env->exception_next_eip, 0);
|
369 |
/* successfully delivered */
|
370 |
env->old_exception = -1;
|
371 |
#elif defined(TARGET_PPC)
|
372 |
do_interrupt(env); |
373 |
#elif defined(TARGET_MIPS)
|
374 |
do_interrupt(env); |
375 |
#elif defined(TARGET_SPARC)
|
376 |
do_interrupt(env->exception_index); |
377 |
#elif defined(TARGET_ARM)
|
378 |
do_interrupt(env); |
379 |
#elif defined(TARGET_SH4)
|
380 |
do_interrupt(env); |
381 |
#elif defined(TARGET_ALPHA)
|
382 |
do_interrupt(env); |
383 |
#elif defined(TARGET_CRIS)
|
384 |
do_interrupt(env); |
385 |
#elif defined(TARGET_M68K)
|
386 |
do_interrupt(0);
|
387 |
#endif
|
388 |
} |
389 |
env->exception_index = -1;
|
390 |
} |
391 |
#ifdef USE_KQEMU
|
392 |
if (kqemu_is_ok(env) && env->interrupt_request == 0) { |
393 |
int ret;
|
394 |
env->eflags = env->eflags | cc_table[CC_OP].compute_all() | (DF & DF_MASK); |
395 |
ret = kqemu_cpu_exec(env); |
396 |
/* put eflags in CPU temporary format */
|
397 |
CC_SRC = env->eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C); |
398 |
DF = 1 - (2 * ((env->eflags >> 10) & 1)); |
399 |
CC_OP = CC_OP_EFLAGS; |
400 |
env->eflags &= ~(DF_MASK | CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C); |
401 |
if (ret == 1) { |
402 |
/* exception */
|
403 |
longjmp(env->jmp_env, 1);
|
404 |
} else if (ret == 2) { |
405 |
/* softmmu execution needed */
|
406 |
} else {
|
407 |
if (env->interrupt_request != 0) { |
408 |
/* hardware interrupt will be executed just after */
|
409 |
} else {
|
410 |
/* otherwise, we restart */
|
411 |
longjmp(env->jmp_env, 1);
|
412 |
} |
413 |
} |
414 |
} |
415 |
#endif
|
416 |
|
417 |
T0 = 0; /* force lookup of first TB */ |
418 |
for(;;) {
|
419 |
SAVE_GLOBALS(); |
420 |
interrupt_request = env->interrupt_request; |
421 |
if (__builtin_expect(interrupt_request, 0) |
422 |
#if defined(TARGET_I386)
|
423 |
&& env->hflags & HF_GIF_MASK |
424 |
#endif
|
425 |
) { |
426 |
if (interrupt_request & CPU_INTERRUPT_DEBUG) {
|
427 |
env->interrupt_request &= ~CPU_INTERRUPT_DEBUG; |
428 |
env->exception_index = EXCP_DEBUG; |
429 |
cpu_loop_exit(); |
430 |
} |
431 |
#if defined(TARGET_ARM) || defined(TARGET_SPARC) || defined(TARGET_MIPS) || \
|
432 |
defined(TARGET_PPC) || defined(TARGET_ALPHA) || defined(TARGET_CRIS) |
433 |
if (interrupt_request & CPU_INTERRUPT_HALT) {
|
434 |
env->interrupt_request &= ~CPU_INTERRUPT_HALT; |
435 |
env->halted = 1;
|
436 |
env->exception_index = EXCP_HLT; |
437 |
cpu_loop_exit(); |
438 |
} |
439 |
#endif
|
440 |
#if defined(TARGET_I386)
|
441 |
if ((interrupt_request & CPU_INTERRUPT_SMI) &&
|
442 |
!(env->hflags & HF_SMM_MASK)) { |
443 |
svm_check_intercept(SVM_EXIT_SMI); |
444 |
env->interrupt_request &= ~CPU_INTERRUPT_SMI; |
445 |
do_smm_enter(); |
446 |
BREAK_CHAIN; |
447 |
} else if ((interrupt_request & CPU_INTERRUPT_NMI) && |
448 |
!(env->hflags & HF_NMI_MASK)) { |
449 |
env->interrupt_request &= ~CPU_INTERRUPT_NMI; |
450 |
env->hflags |= HF_NMI_MASK; |
451 |
do_interrupt(EXCP02_NMI, 0, 0, 0, 1); |
452 |
BREAK_CHAIN; |
453 |
} else if ((interrupt_request & CPU_INTERRUPT_HARD) && |
454 |
(env->eflags & IF_MASK || env->hflags & HF_HIF_MASK) && |
455 |
!(env->hflags & HF_INHIBIT_IRQ_MASK)) { |
456 |
int intno;
|
457 |
svm_check_intercept(SVM_EXIT_INTR); |
458 |
env->interrupt_request &= ~(CPU_INTERRUPT_HARD | CPU_INTERRUPT_VIRQ); |
459 |
intno = cpu_get_pic_interrupt(env); |
460 |
if (loglevel & CPU_LOG_TB_IN_ASM) {
|
461 |
fprintf(logfile, "Servicing hardware INT=0x%02x\n", intno);
|
462 |
} |
463 |
do_interrupt(intno, 0, 0, 0, 1); |
464 |
/* ensure that no TB jump will be modified as
|
465 |
the program flow was changed */
|
466 |
BREAK_CHAIN; |
467 |
#if !defined(CONFIG_USER_ONLY)
|
468 |
} else if ((interrupt_request & CPU_INTERRUPT_VIRQ) && |
469 |
(env->eflags & IF_MASK) && !(env->hflags & HF_INHIBIT_IRQ_MASK)) { |
470 |
int intno;
|
471 |
/* FIXME: this should respect TPR */
|
472 |
env->interrupt_request &= ~CPU_INTERRUPT_VIRQ; |
473 |
svm_check_intercept(SVM_EXIT_VINTR); |
474 |
intno = ldl_phys(env->vm_vmcb + offsetof(struct vmcb, control.int_vector));
|
475 |
if (loglevel & CPU_LOG_TB_IN_ASM)
|
476 |
fprintf(logfile, "Servicing virtual hardware INT=0x%02x\n", intno);
|
477 |
do_interrupt(intno, 0, 0, -1, 1); |
478 |
stl_phys(env->vm_vmcb + offsetof(struct vmcb, control.int_ctl),
|
479 |
ldl_phys(env->vm_vmcb + offsetof(struct vmcb, control.int_ctl)) & ~V_IRQ_MASK);
|
480 |
BREAK_CHAIN; |
481 |
#endif
|
482 |
} |
483 |
#elif defined(TARGET_PPC)
|
484 |
#if 0
|
485 |
if ((interrupt_request & CPU_INTERRUPT_RESET)) {
|
486 |
cpu_ppc_reset(env);
|
487 |
}
|
488 |
#endif
|
489 |
if (interrupt_request & CPU_INTERRUPT_HARD) {
|
490 |
ppc_hw_interrupt(env); |
491 |
if (env->pending_interrupts == 0) |
492 |
env->interrupt_request &= ~CPU_INTERRUPT_HARD; |
493 |
BREAK_CHAIN; |
494 |
} |
495 |
#elif defined(TARGET_MIPS)
|
496 |
if ((interrupt_request & CPU_INTERRUPT_HARD) &&
|
497 |
(env->CP0_Status & env->CP0_Cause & CP0Ca_IP_mask) && |
498 |
(env->CP0_Status & (1 << CP0St_IE)) &&
|
499 |
!(env->CP0_Status & (1 << CP0St_EXL)) &&
|
500 |
!(env->CP0_Status & (1 << CP0St_ERL)) &&
|
501 |
!(env->hflags & MIPS_HFLAG_DM)) { |
502 |
/* Raise it */
|
503 |
env->exception_index = EXCP_EXT_INTERRUPT; |
504 |
env->error_code = 0;
|
505 |
do_interrupt(env); |
506 |
BREAK_CHAIN; |
507 |
} |
508 |
#elif defined(TARGET_SPARC)
|
509 |
if ((interrupt_request & CPU_INTERRUPT_HARD) &&
|
510 |
(env->psret != 0)) {
|
511 |
int pil = env->interrupt_index & 15; |
512 |
int type = env->interrupt_index & 0xf0; |
513 |
|
514 |
if (((type == TT_EXTINT) &&
|
515 |
(pil == 15 || pil > env->psrpil)) ||
|
516 |
type != TT_EXTINT) { |
517 |
env->interrupt_request &= ~CPU_INTERRUPT_HARD; |
518 |
do_interrupt(env->interrupt_index); |
519 |
env->interrupt_index = 0;
|
520 |
#if !defined(TARGET_SPARC64) && !defined(CONFIG_USER_ONLY)
|
521 |
cpu_check_irqs(env); |
522 |
#endif
|
523 |
BREAK_CHAIN; |
524 |
} |
525 |
} else if (interrupt_request & CPU_INTERRUPT_TIMER) { |
526 |
//do_interrupt(0, 0, 0, 0, 0);
|
527 |
env->interrupt_request &= ~CPU_INTERRUPT_TIMER; |
528 |
} |
529 |
#elif defined(TARGET_ARM)
|
530 |
if (interrupt_request & CPU_INTERRUPT_FIQ
|
531 |
&& !(env->uncached_cpsr & CPSR_F)) { |
532 |
env->exception_index = EXCP_FIQ; |
533 |
do_interrupt(env); |
534 |
BREAK_CHAIN; |
535 |
} |
536 |
/* ARMv7-M interrupt return works by loading a magic value
|
537 |
into the PC. On real hardware the load causes the
|
538 |
return to occur. The qemu implementation performs the
|
539 |
jump normally, then does the exception return when the
|
540 |
CPU tries to execute code at the magic address.
|
541 |
This will cause the magic PC value to be pushed to
|
542 |
the stack if an interrupt occured at the wrong time.
|
543 |
We avoid this by disabling interrupts when
|
544 |
pc contains a magic address. */
|
545 |
if (interrupt_request & CPU_INTERRUPT_HARD
|
546 |
&& ((IS_M(env) && env->regs[15] < 0xfffffff0) |
547 |
|| !(env->uncached_cpsr & CPSR_I))) { |
548 |
env->exception_index = EXCP_IRQ; |
549 |
do_interrupt(env); |
550 |
BREAK_CHAIN; |
551 |
} |
552 |
#elif defined(TARGET_SH4)
|
553 |
if (interrupt_request & CPU_INTERRUPT_HARD) {
|
554 |
do_interrupt(env); |
555 |
BREAK_CHAIN; |
556 |
} |
557 |
#elif defined(TARGET_ALPHA)
|
558 |
if (interrupt_request & CPU_INTERRUPT_HARD) {
|
559 |
do_interrupt(env); |
560 |
BREAK_CHAIN; |
561 |
} |
562 |
#elif defined(TARGET_CRIS)
|
563 |
if (interrupt_request & CPU_INTERRUPT_HARD) {
|
564 |
do_interrupt(env); |
565 |
BREAK_CHAIN; |
566 |
} |
567 |
#elif defined(TARGET_M68K)
|
568 |
if (interrupt_request & CPU_INTERRUPT_HARD
|
569 |
&& ((env->sr & SR_I) >> SR_I_SHIFT) |
570 |
< env->pending_level) { |
571 |
/* Real hardware gets the interrupt vector via an
|
572 |
IACK cycle at this point. Current emulated
|
573 |
hardware doesn't rely on this, so we
|
574 |
provide/save the vector when the interrupt is
|
575 |
first signalled. */
|
576 |
env->exception_index = env->pending_vector; |
577 |
do_interrupt(1);
|
578 |
BREAK_CHAIN; |
579 |
} |
580 |
#endif
|
581 |
/* Don't use the cached interupt_request value,
|
582 |
do_interrupt may have updated the EXITTB flag. */
|
583 |
if (env->interrupt_request & CPU_INTERRUPT_EXITTB) {
|
584 |
env->interrupt_request &= ~CPU_INTERRUPT_EXITTB; |
585 |
/* ensure that no TB jump will be modified as
|
586 |
the program flow was changed */
|
587 |
BREAK_CHAIN; |
588 |
} |
589 |
if (interrupt_request & CPU_INTERRUPT_EXIT) {
|
590 |
env->interrupt_request &= ~CPU_INTERRUPT_EXIT; |
591 |
env->exception_index = EXCP_INTERRUPT; |
592 |
cpu_loop_exit(); |
593 |
} |
594 |
} |
595 |
#ifdef DEBUG_EXEC
|
596 |
if ((loglevel & CPU_LOG_TB_CPU)) {
|
597 |
/* restore flags in standard format */
|
598 |
regs_to_env(); |
599 |
#if defined(TARGET_I386)
|
600 |
env->eflags = env->eflags | cc_table[CC_OP].compute_all() | (DF & DF_MASK); |
601 |
cpu_dump_state(env, logfile, fprintf, X86_DUMP_CCOP); |
602 |
env->eflags &= ~(DF_MASK | CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C); |
603 |
#elif defined(TARGET_ARM)
|
604 |
cpu_dump_state(env, logfile, fprintf, 0);
|
605 |
#elif defined(TARGET_SPARC)
|
606 |
REGWPTR = env->regbase + (env->cwp * 16);
|
607 |
env->regwptr = REGWPTR; |
608 |
cpu_dump_state(env, logfile, fprintf, 0);
|
609 |
#elif defined(TARGET_PPC)
|
610 |
cpu_dump_state(env, logfile, fprintf, 0);
|
611 |
#elif defined(TARGET_M68K)
|
612 |
cpu_m68k_flush_flags(env, env->cc_op); |
613 |
env->cc_op = CC_OP_FLAGS; |
614 |
env->sr = (env->sr & 0xffe0)
|
615 |
| env->cc_dest | (env->cc_x << 4);
|
616 |
cpu_dump_state(env, logfile, fprintf, 0);
|
617 |
#elif defined(TARGET_MIPS)
|
618 |
cpu_dump_state(env, logfile, fprintf, 0);
|
619 |
#elif defined(TARGET_SH4)
|
620 |
cpu_dump_state(env, logfile, fprintf, 0);
|
621 |
#elif defined(TARGET_ALPHA)
|
622 |
cpu_dump_state(env, logfile, fprintf, 0);
|
623 |
#elif defined(TARGET_CRIS)
|
624 |
cpu_dump_state(env, logfile, fprintf, 0);
|
625 |
#else
|
626 |
#error unsupported target CPU
|
627 |
#endif
|
628 |
} |
629 |
#endif
|
630 |
tb = tb_find_fast(); |
631 |
#ifdef DEBUG_EXEC
|
632 |
if ((loglevel & CPU_LOG_EXEC)) {
|
633 |
fprintf(logfile, "Trace 0x%08lx [" TARGET_FMT_lx "] %s\n", |
634 |
(long)tb->tc_ptr, tb->pc,
|
635 |
lookup_symbol(tb->pc)); |
636 |
} |
637 |
#endif
|
638 |
RESTORE_GLOBALS(); |
639 |
/* see if we can patch the calling TB. When the TB
|
640 |
spans two pages, we cannot safely do a direct
|
641 |
jump. */
|
642 |
{ |
643 |
if (T0 != 0 && |
644 |
#if USE_KQEMU
|
645 |
(env->kqemu_enabled != 2) &&
|
646 |
#endif
|
647 |
tb->page_addr[1] == -1) { |
648 |
spin_lock(&tb_lock); |
649 |
tb_add_jump((TranslationBlock *)(long)(T0 & ~3), T0 & 3, tb); |
650 |
spin_unlock(&tb_lock); |
651 |
} |
652 |
} |
653 |
tc_ptr = tb->tc_ptr; |
654 |
env->current_tb = tb; |
655 |
/* execute the generated code */
|
656 |
gen_func = (void *)tc_ptr;
|
657 |
#if defined(__sparc__)
|
658 |
__asm__ __volatile__("call %0\n\t"
|
659 |
"mov %%o7,%%i0"
|
660 |
: /* no outputs */
|
661 |
: "r" (gen_func)
|
662 |
: "i0", "i1", "i2", "i3", "i4", "i5", |
663 |
"o0", "o1", "o2", "o3", "o4", "o5", |
664 |
"l0", "l1", "l2", "l3", "l4", "l5", |
665 |
"l6", "l7"); |
666 |
#elif defined(__hppa__)
|
667 |
asm volatile ("ble 0(%%sr4,%1)\n" |
668 |
"copy %%r31,%%r18\n"
|
669 |
"copy %%r28,%0\n"
|
670 |
: "=r" (T0)
|
671 |
: "r" (gen_func)
|
672 |
: "r1", "r2", "r3", "r4", "r5", "r6", "r7", |
673 |
"r8", "r9", "r10", "r11", "r12", "r13", |
674 |
"r18", "r19", "r20", "r21", "r22", "r23", |
675 |
"r24", "r25", "r26", "r27", "r28", "r29", |
676 |
"r30", "r31"); |
677 |
#elif defined(__arm__)
|
678 |
asm volatile ("mov pc, %0\n\t" |
679 |
".global exec_loop\n\t"
|
680 |
"exec_loop:\n\t"
|
681 |
: /* no outputs */
|
682 |
: "r" (gen_func)
|
683 |
: "r1", "r2", "r3", "r8", "r9", "r10", "r12", "r14"); |
684 |
#elif defined(__ia64)
|
685 |
struct fptr {
|
686 |
void *ip;
|
687 |
void *gp;
|
688 |
} fp; |
689 |
|
690 |
fp.ip = tc_ptr; |
691 |
fp.gp = code_gen_buffer + 2 * (1 << 20); |
692 |
(*(void (*)(void)) &fp)(); |
693 |
#else
|
694 |
T0 = gen_func(); |
695 |
#endif
|
696 |
env->current_tb = NULL;
|
697 |
/* reset soft MMU for next block (it can currently
|
698 |
only be set by a memory fault) */
|
699 |
#if defined(TARGET_I386) && !defined(CONFIG_SOFTMMU)
|
700 |
if (env->hflags & HF_SOFTMMU_MASK) {
|
701 |
env->hflags &= ~HF_SOFTMMU_MASK; |
702 |
/* do not allow linking to another block */
|
703 |
T0 = 0;
|
704 |
} |
705 |
#endif
|
706 |
#if defined(USE_KQEMU)
|
707 |
#define MIN_CYCLE_BEFORE_SWITCH (100 * 1000) |
708 |
if (kqemu_is_ok(env) &&
|
709 |
(cpu_get_time_fast() - env->last_io_time) >= MIN_CYCLE_BEFORE_SWITCH) { |
710 |
cpu_loop_exit(); |
711 |
} |
712 |
#endif
|
713 |
} /* for(;;) */
|
714 |
} else {
|
715 |
env_to_regs(); |
716 |
} |
717 |
} /* for(;;) */
|
718 |
|
719 |
|
720 |
#if defined(TARGET_I386)
|
721 |
/* restore flags in standard format */
|
722 |
env->eflags = env->eflags | cc_table[CC_OP].compute_all() | (DF & DF_MASK); |
723 |
#elif defined(TARGET_ARM)
|
724 |
/* XXX: Save/restore host fpu exception state?. */
|
725 |
#elif defined(TARGET_SPARC)
|
726 |
#if defined(reg_REGWPTR)
|
727 |
REGWPTR = saved_regwptr; |
728 |
#endif
|
729 |
#elif defined(TARGET_PPC)
|
730 |
#elif defined(TARGET_M68K)
|
731 |
cpu_m68k_flush_flags(env, env->cc_op); |
732 |
env->cc_op = CC_OP_FLAGS; |
733 |
env->sr = (env->sr & 0xffe0)
|
734 |
| env->cc_dest | (env->cc_x << 4);
|
735 |
#elif defined(TARGET_MIPS)
|
736 |
#elif defined(TARGET_SH4)
|
737 |
#elif defined(TARGET_ALPHA)
|
738 |
#elif defined(TARGET_CRIS)
|
739 |
/* XXXXX */
|
740 |
#else
|
741 |
#error unsupported target CPU
|
742 |
#endif
|
743 |
|
744 |
/* restore global registers */
|
745 |
RESTORE_GLOBALS(); |
746 |
#include "hostregs_helper.h" |
747 |
|
748 |
/* fail safe : never use cpu_single_env outside cpu_exec() */
|
749 |
cpu_single_env = NULL;
|
750 |
return ret;
|
751 |
} |
752 |
|
753 |
/* must only be called from the generated code as an exception can be
|
754 |
generated */
|
755 |
void tb_invalidate_page_range(target_ulong start, target_ulong end)
|
756 |
{ |
757 |
/* XXX: cannot enable it yet because it yields to MMU exception
|
758 |
where NIP != read address on PowerPC */
|
759 |
#if 0
|
760 |
target_ulong phys_addr;
|
761 |
phys_addr = get_phys_addr_code(env, start);
|
762 |
tb_invalidate_phys_page_range(phys_addr, phys_addr + end - start, 0);
|
763 |
#endif
|
764 |
} |
765 |
|
766 |
#if defined(TARGET_I386) && defined(CONFIG_USER_ONLY)
|
767 |
|
768 |
void cpu_x86_load_seg(CPUX86State *s, int seg_reg, int selector) |
769 |
{ |
770 |
CPUX86State *saved_env; |
771 |
|
772 |
saved_env = env; |
773 |
env = s; |
774 |
if (!(env->cr[0] & CR0_PE_MASK) || (env->eflags & VM_MASK)) { |
775 |
selector &= 0xffff;
|
776 |
cpu_x86_load_seg_cache(env, seg_reg, selector, |
777 |
(selector << 4), 0xffff, 0); |
778 |
} else {
|
779 |
load_seg(seg_reg, selector); |
780 |
} |
781 |
env = saved_env; |
782 |
} |
783 |
|
784 |
void cpu_x86_fsave(CPUX86State *s, target_ulong ptr, int data32) |
785 |
{ |
786 |
CPUX86State *saved_env; |
787 |
|
788 |
saved_env = env; |
789 |
env = s; |
790 |
|
791 |
helper_fsave(ptr, data32); |
792 |
|
793 |
env = saved_env; |
794 |
} |
795 |
|
796 |
void cpu_x86_frstor(CPUX86State *s, target_ulong ptr, int data32) |
797 |
{ |
798 |
CPUX86State *saved_env; |
799 |
|
800 |
saved_env = env; |
801 |
env = s; |
802 |
|
803 |
helper_frstor(ptr, data32); |
804 |
|
805 |
env = saved_env; |
806 |
} |
807 |
|
808 |
#endif /* TARGET_I386 */ |
809 |
|
810 |
#if !defined(CONFIG_SOFTMMU)
|
811 |
|
812 |
#if defined(TARGET_I386)
|
813 |
|
814 |
/* 'pc' is the host PC at which the exception was raised. 'address' is
|
815 |
the effective address of the memory exception. 'is_write' is 1 if a
|
816 |
write caused the exception and otherwise 0'. 'old_set' is the
|
817 |
signal set which should be restored */
|
818 |
static inline int handle_cpu_signal(unsigned long pc, unsigned long address, |
819 |
int is_write, sigset_t *old_set,
|
820 |
void *puc)
|
821 |
{ |
822 |
TranslationBlock *tb; |
823 |
int ret;
|
824 |
|
825 |
if (cpu_single_env)
|
826 |
env = cpu_single_env; /* XXX: find a correct solution for multithread */
|
827 |
#if defined(DEBUG_SIGNAL)
|
828 |
qemu_printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
|
829 |
pc, address, is_write, *(unsigned long *)old_set); |
830 |
#endif
|
831 |
/* XXX: locking issue */
|
832 |
if (is_write && page_unprotect(h2g(address), pc, puc)) {
|
833 |
return 1; |
834 |
} |
835 |
|
836 |
/* see if it is an MMU fault */
|
837 |
ret = cpu_x86_handle_mmu_fault(env, address, is_write, MMU_USER_IDX, 0);
|
838 |
if (ret < 0) |
839 |
return 0; /* not an MMU fault */ |
840 |
if (ret == 0) |
841 |
return 1; /* the MMU fault was handled without causing real CPU fault */ |
842 |
/* now we have a real cpu fault */
|
843 |
tb = tb_find_pc(pc); |
844 |
if (tb) {
|
845 |
/* the PC is inside the translated code. It means that we have
|
846 |
a virtual CPU fault */
|
847 |
cpu_restore_state(tb, env, pc, puc); |
848 |
} |
849 |
if (ret == 1) { |
850 |
#if 0
|
851 |
printf("PF exception: EIP=0x%08x CR2=0x%08x error=0x%x\n",
|
852 |
env->eip, env->cr[2], env->error_code);
|
853 |
#endif
|
854 |
/* we restore the process signal mask as the sigreturn should
|
855 |
do it (XXX: use sigsetjmp) */
|
856 |
sigprocmask(SIG_SETMASK, old_set, NULL);
|
857 |
raise_exception_err(env->exception_index, env->error_code); |
858 |
} else {
|
859 |
/* activate soft MMU for this block */
|
860 |
env->hflags |= HF_SOFTMMU_MASK; |
861 |
cpu_resume_from_signal(env, puc); |
862 |
} |
863 |
/* never comes here */
|
864 |
return 1; |
865 |
} |
866 |
|
867 |
#elif defined(TARGET_ARM)
|
868 |
static inline int handle_cpu_signal(unsigned long pc, unsigned long address, |
869 |
int is_write, sigset_t *old_set,
|
870 |
void *puc)
|
871 |
{ |
872 |
TranslationBlock *tb; |
873 |
int ret;
|
874 |
|
875 |
if (cpu_single_env)
|
876 |
env = cpu_single_env; /* XXX: find a correct solution for multithread */
|
877 |
#if defined(DEBUG_SIGNAL)
|
878 |
printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
|
879 |
pc, address, is_write, *(unsigned long *)old_set); |
880 |
#endif
|
881 |
/* XXX: locking issue */
|
882 |
if (is_write && page_unprotect(h2g(address), pc, puc)) {
|
883 |
return 1; |
884 |
} |
885 |
/* see if it is an MMU fault */
|
886 |
ret = cpu_arm_handle_mmu_fault(env, address, is_write, MMU_USER_IDX, 0);
|
887 |
if (ret < 0) |
888 |
return 0; /* not an MMU fault */ |
889 |
if (ret == 0) |
890 |
return 1; /* the MMU fault was handled without causing real CPU fault */ |
891 |
/* now we have a real cpu fault */
|
892 |
tb = tb_find_pc(pc); |
893 |
if (tb) {
|
894 |
/* the PC is inside the translated code. It means that we have
|
895 |
a virtual CPU fault */
|
896 |
cpu_restore_state(tb, env, pc, puc); |
897 |
} |
898 |
/* we restore the process signal mask as the sigreturn should
|
899 |
do it (XXX: use sigsetjmp) */
|
900 |
sigprocmask(SIG_SETMASK, old_set, NULL);
|
901 |
cpu_loop_exit(); |
902 |
/* never comes here */
|
903 |
return 1; |
904 |
} |
905 |
#elif defined(TARGET_SPARC)
|
906 |
static inline int handle_cpu_signal(unsigned long pc, unsigned long address, |
907 |
int is_write, sigset_t *old_set,
|
908 |
void *puc)
|
909 |
{ |
910 |
TranslationBlock *tb; |
911 |
int ret;
|
912 |
|
913 |
if (cpu_single_env)
|
914 |
env = cpu_single_env; /* XXX: find a correct solution for multithread */
|
915 |
#if defined(DEBUG_SIGNAL)
|
916 |
printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
|
917 |
pc, address, is_write, *(unsigned long *)old_set); |
918 |
#endif
|
919 |
/* XXX: locking issue */
|
920 |
if (is_write && page_unprotect(h2g(address), pc, puc)) {
|
921 |
return 1; |
922 |
} |
923 |
/* see if it is an MMU fault */
|
924 |
ret = cpu_sparc_handle_mmu_fault(env, address, is_write, MMU_USER_IDX, 0);
|
925 |
if (ret < 0) |
926 |
return 0; /* not an MMU fault */ |
927 |
if (ret == 0) |
928 |
return 1; /* the MMU fault was handled without causing real CPU fault */ |
929 |
/* now we have a real cpu fault */
|
930 |
tb = tb_find_pc(pc); |
931 |
if (tb) {
|
932 |
/* the PC is inside the translated code. It means that we have
|
933 |
a virtual CPU fault */
|
934 |
cpu_restore_state(tb, env, pc, puc); |
935 |
} |
936 |
/* we restore the process signal mask as the sigreturn should
|
937 |
do it (XXX: use sigsetjmp) */
|
938 |
sigprocmask(SIG_SETMASK, old_set, NULL);
|
939 |
cpu_loop_exit(); |
940 |
/* never comes here */
|
941 |
return 1; |
942 |
} |
943 |
#elif defined (TARGET_PPC)
|
944 |
static inline int handle_cpu_signal(unsigned long pc, unsigned long address, |
945 |
int is_write, sigset_t *old_set,
|
946 |
void *puc)
|
947 |
{ |
948 |
TranslationBlock *tb; |
949 |
int ret;
|
950 |
|
951 |
if (cpu_single_env)
|
952 |
env = cpu_single_env; /* XXX: find a correct solution for multithread */
|
953 |
#if defined(DEBUG_SIGNAL)
|
954 |
printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
|
955 |
pc, address, is_write, *(unsigned long *)old_set); |
956 |
#endif
|
957 |
/* XXX: locking issue */
|
958 |
if (is_write && page_unprotect(h2g(address), pc, puc)) {
|
959 |
return 1; |
960 |
} |
961 |
|
962 |
/* see if it is an MMU fault */
|
963 |
ret = cpu_ppc_handle_mmu_fault(env, address, is_write, MMU_USER_IDX, 0);
|
964 |
if (ret < 0) |
965 |
return 0; /* not an MMU fault */ |
966 |
if (ret == 0) |
967 |
return 1; /* the MMU fault was handled without causing real CPU fault */ |
968 |
|
969 |
/* now we have a real cpu fault */
|
970 |
tb = tb_find_pc(pc); |
971 |
if (tb) {
|
972 |
/* the PC is inside the translated code. It means that we have
|
973 |
a virtual CPU fault */
|
974 |
cpu_restore_state(tb, env, pc, puc); |
975 |
} |
976 |
if (ret == 1) { |
977 |
#if 0
|
978 |
printf("PF exception: NIP=0x%08x error=0x%x %p\n",
|
979 |
env->nip, env->error_code, tb);
|
980 |
#endif
|
981 |
/* we restore the process signal mask as the sigreturn should
|
982 |
do it (XXX: use sigsetjmp) */
|
983 |
sigprocmask(SIG_SETMASK, old_set, NULL);
|
984 |
do_raise_exception_err(env->exception_index, env->error_code); |
985 |
} else {
|
986 |
/* activate soft MMU for this block */
|
987 |
cpu_resume_from_signal(env, puc); |
988 |
} |
989 |
/* never comes here */
|
990 |
return 1; |
991 |
} |
992 |
|
993 |
#elif defined(TARGET_M68K)
|
994 |
static inline int handle_cpu_signal(unsigned long pc, unsigned long address, |
995 |
int is_write, sigset_t *old_set,
|
996 |
void *puc)
|
997 |
{ |
998 |
TranslationBlock *tb; |
999 |
int ret;
|
1000 |
|
1001 |
if (cpu_single_env)
|
1002 |
env = cpu_single_env; /* XXX: find a correct solution for multithread */
|
1003 |
#if defined(DEBUG_SIGNAL)
|
1004 |
printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
|
1005 |
pc, address, is_write, *(unsigned long *)old_set); |
1006 |
#endif
|
1007 |
/* XXX: locking issue */
|
1008 |
if (is_write && page_unprotect(address, pc, puc)) {
|
1009 |
return 1; |
1010 |
} |
1011 |
/* see if it is an MMU fault */
|
1012 |
ret = cpu_m68k_handle_mmu_fault(env, address, is_write, MMU_USER_IDX, 0);
|
1013 |
if (ret < 0) |
1014 |
return 0; /* not an MMU fault */ |
1015 |
if (ret == 0) |
1016 |
return 1; /* the MMU fault was handled without causing real CPU fault */ |
1017 |
/* now we have a real cpu fault */
|
1018 |
tb = tb_find_pc(pc); |
1019 |
if (tb) {
|
1020 |
/* the PC is inside the translated code. It means that we have
|
1021 |
a virtual CPU fault */
|
1022 |
cpu_restore_state(tb, env, pc, puc); |
1023 |
} |
1024 |
/* we restore the process signal mask as the sigreturn should
|
1025 |
do it (XXX: use sigsetjmp) */
|
1026 |
sigprocmask(SIG_SETMASK, old_set, NULL);
|
1027 |
cpu_loop_exit(); |
1028 |
/* never comes here */
|
1029 |
return 1; |
1030 |
} |
1031 |
|
1032 |
#elif defined (TARGET_MIPS)
|
1033 |
static inline int handle_cpu_signal(unsigned long pc, unsigned long address, |
1034 |
int is_write, sigset_t *old_set,
|
1035 |
void *puc)
|
1036 |
{ |
1037 |
TranslationBlock *tb; |
1038 |
int ret;
|
1039 |
|
1040 |
if (cpu_single_env)
|
1041 |
env = cpu_single_env; /* XXX: find a correct solution for multithread */
|
1042 |
#if defined(DEBUG_SIGNAL)
|
1043 |
printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
|
1044 |
pc, address, is_write, *(unsigned long *)old_set); |
1045 |
#endif
|
1046 |
/* XXX: locking issue */
|
1047 |
if (is_write && page_unprotect(h2g(address), pc, puc)) {
|
1048 |
return 1; |
1049 |
} |
1050 |
|
1051 |
/* see if it is an MMU fault */
|
1052 |
ret = cpu_mips_handle_mmu_fault(env, address, is_write, MMU_USER_IDX, 0);
|
1053 |
if (ret < 0) |
1054 |
return 0; /* not an MMU fault */ |
1055 |
if (ret == 0) |
1056 |
return 1; /* the MMU fault was handled without causing real CPU fault */ |
1057 |
|
1058 |
/* now we have a real cpu fault */
|
1059 |
tb = tb_find_pc(pc); |
1060 |
if (tb) {
|
1061 |
/* the PC is inside the translated code. It means that we have
|
1062 |
a virtual CPU fault */
|
1063 |
cpu_restore_state(tb, env, pc, puc); |
1064 |
} |
1065 |
if (ret == 1) { |
1066 |
#if 0
|
1067 |
printf("PF exception: PC=0x" TARGET_FMT_lx " error=0x%x %p\n",
|
1068 |
env->PC, env->error_code, tb);
|
1069 |
#endif
|
1070 |
/* we restore the process signal mask as the sigreturn should
|
1071 |
do it (XXX: use sigsetjmp) */
|
1072 |
sigprocmask(SIG_SETMASK, old_set, NULL);
|
1073 |
do_raise_exception_err(env->exception_index, env->error_code); |
1074 |
} else {
|
1075 |
/* activate soft MMU for this block */
|
1076 |
cpu_resume_from_signal(env, puc); |
1077 |
} |
1078 |
/* never comes here */
|
1079 |
return 1; |
1080 |
} |
1081 |
|
1082 |
#elif defined (TARGET_SH4)
|
1083 |
static inline int handle_cpu_signal(unsigned long pc, unsigned long address, |
1084 |
int is_write, sigset_t *old_set,
|
1085 |
void *puc)
|
1086 |
{ |
1087 |
TranslationBlock *tb; |
1088 |
int ret;
|
1089 |
|
1090 |
if (cpu_single_env)
|
1091 |
env = cpu_single_env; /* XXX: find a correct solution for multithread */
|
1092 |
#if defined(DEBUG_SIGNAL)
|
1093 |
printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
|
1094 |
pc, address, is_write, *(unsigned long *)old_set); |
1095 |
#endif
|
1096 |
/* XXX: locking issue */
|
1097 |
if (is_write && page_unprotect(h2g(address), pc, puc)) {
|
1098 |
return 1; |
1099 |
} |
1100 |
|
1101 |
/* see if it is an MMU fault */
|
1102 |
ret = cpu_sh4_handle_mmu_fault(env, address, is_write, MMU_USER_IDX, 0);
|
1103 |
if (ret < 0) |
1104 |
return 0; /* not an MMU fault */ |
1105 |
if (ret == 0) |
1106 |
return 1; /* the MMU fault was handled without causing real CPU fault */ |
1107 |
|
1108 |
/* now we have a real cpu fault */
|
1109 |
tb = tb_find_pc(pc); |
1110 |
if (tb) {
|
1111 |
/* the PC is inside the translated code. It means that we have
|
1112 |
a virtual CPU fault */
|
1113 |
cpu_restore_state(tb, env, pc, puc); |
1114 |
} |
1115 |
#if 0
|
1116 |
printf("PF exception: NIP=0x%08x error=0x%x %p\n",
|
1117 |
env->nip, env->error_code, tb);
|
1118 |
#endif
|
1119 |
/* we restore the process signal mask as the sigreturn should
|
1120 |
do it (XXX: use sigsetjmp) */
|
1121 |
sigprocmask(SIG_SETMASK, old_set, NULL);
|
1122 |
cpu_loop_exit(); |
1123 |
/* never comes here */
|
1124 |
return 1; |
1125 |
} |
1126 |
|
1127 |
#elif defined (TARGET_ALPHA)
|
1128 |
static inline int handle_cpu_signal(unsigned long pc, unsigned long address, |
1129 |
int is_write, sigset_t *old_set,
|
1130 |
void *puc)
|
1131 |
{ |
1132 |
TranslationBlock *tb; |
1133 |
int ret;
|
1134 |
|
1135 |
if (cpu_single_env)
|
1136 |
env = cpu_single_env; /* XXX: find a correct solution for multithread */
|
1137 |
#if defined(DEBUG_SIGNAL)
|
1138 |
printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
|
1139 |
pc, address, is_write, *(unsigned long *)old_set); |
1140 |
#endif
|
1141 |
/* XXX: locking issue */
|
1142 |
if (is_write && page_unprotect(h2g(address), pc, puc)) {
|
1143 |
return 1; |
1144 |
} |
1145 |
|
1146 |
/* see if it is an MMU fault */
|
1147 |
ret = cpu_alpha_handle_mmu_fault(env, address, is_write, MMU_USER_IDX, 0);
|
1148 |
if (ret < 0) |
1149 |
return 0; /* not an MMU fault */ |
1150 |
if (ret == 0) |
1151 |
return 1; /* the MMU fault was handled without causing real CPU fault */ |
1152 |
|
1153 |
/* now we have a real cpu fault */
|
1154 |
tb = tb_find_pc(pc); |
1155 |
if (tb) {
|
1156 |
/* the PC is inside the translated code. It means that we have
|
1157 |
a virtual CPU fault */
|
1158 |
cpu_restore_state(tb, env, pc, puc); |
1159 |
} |
1160 |
#if 0
|
1161 |
printf("PF exception: NIP=0x%08x error=0x%x %p\n",
|
1162 |
env->nip, env->error_code, tb);
|
1163 |
#endif
|
1164 |
/* we restore the process signal mask as the sigreturn should
|
1165 |
do it (XXX: use sigsetjmp) */
|
1166 |
sigprocmask(SIG_SETMASK, old_set, NULL);
|
1167 |
cpu_loop_exit(); |
1168 |
/* never comes here */
|
1169 |
return 1; |
1170 |
} |
1171 |
#elif defined (TARGET_CRIS)
|
1172 |
static inline int handle_cpu_signal(unsigned long pc, unsigned long address, |
1173 |
int is_write, sigset_t *old_set,
|
1174 |
void *puc)
|
1175 |
{ |
1176 |
TranslationBlock *tb; |
1177 |
int ret;
|
1178 |
|
1179 |
if (cpu_single_env)
|
1180 |
env = cpu_single_env; /* XXX: find a correct solution for multithread */
|
1181 |
#if defined(DEBUG_SIGNAL)
|
1182 |
printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
|
1183 |
pc, address, is_write, *(unsigned long *)old_set); |
1184 |
#endif
|
1185 |
/* XXX: locking issue */
|
1186 |
if (is_write && page_unprotect(h2g(address), pc, puc)) {
|
1187 |
return 1; |
1188 |
} |
1189 |
|
1190 |
/* see if it is an MMU fault */
|
1191 |
ret = cpu_cris_handle_mmu_fault(env, address, is_write, MMU_USER_IDX, 0);
|
1192 |
if (ret < 0) |
1193 |
return 0; /* not an MMU fault */ |
1194 |
if (ret == 0) |
1195 |
return 1; /* the MMU fault was handled without causing real CPU fault */ |
1196 |
|
1197 |
/* now we have a real cpu fault */
|
1198 |
tb = tb_find_pc(pc); |
1199 |
if (tb) {
|
1200 |
/* the PC is inside the translated code. It means that we have
|
1201 |
a virtual CPU fault */
|
1202 |
cpu_restore_state(tb, env, pc, puc); |
1203 |
} |
1204 |
/* we restore the process signal mask as the sigreturn should
|
1205 |
do it (XXX: use sigsetjmp) */
|
1206 |
sigprocmask(SIG_SETMASK, old_set, NULL);
|
1207 |
cpu_loop_exit(); |
1208 |
/* never comes here */
|
1209 |
return 1; |
1210 |
} |
1211 |
|
1212 |
#else
|
1213 |
#error unsupported target CPU
|
1214 |
#endif
|
1215 |
|
1216 |
#if defined(__i386__)
|
1217 |
|
1218 |
#if defined(__APPLE__)
|
1219 |
# include <sys/ucontext.h> |
1220 |
|
1221 |
# define EIP_sig(context) (*((unsigned long*)&(context)->uc_mcontext->ss.eip)) |
1222 |
# define TRAP_sig(context) ((context)->uc_mcontext->es.trapno)
|
1223 |
# define ERROR_sig(context) ((context)->uc_mcontext->es.err)
|
1224 |
#else
|
1225 |
# define EIP_sig(context) ((context)->uc_mcontext.gregs[REG_EIP])
|
1226 |
# define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO])
|
1227 |
# define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR])
|
1228 |
#endif
|
1229 |
|
1230 |
int cpu_signal_handler(int host_signum, void *pinfo, |
1231 |
void *puc)
|
1232 |
{ |
1233 |
siginfo_t *info = pinfo; |
1234 |
struct ucontext *uc = puc;
|
1235 |
unsigned long pc; |
1236 |
int trapno;
|
1237 |
|
1238 |
#ifndef REG_EIP
|
1239 |
/* for glibc 2.1 */
|
1240 |
#define REG_EIP EIP
|
1241 |
#define REG_ERR ERR
|
1242 |
#define REG_TRAPNO TRAPNO
|
1243 |
#endif
|
1244 |
pc = EIP_sig(uc); |
1245 |
trapno = TRAP_sig(uc); |
1246 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
1247 |
trapno == 0xe ?
|
1248 |
(ERROR_sig(uc) >> 1) & 1 : 0, |
1249 |
&uc->uc_sigmask, puc); |
1250 |
} |
1251 |
|
1252 |
#elif defined(__x86_64__)
|
1253 |
|
1254 |
int cpu_signal_handler(int host_signum, void *pinfo, |
1255 |
void *puc)
|
1256 |
{ |
1257 |
siginfo_t *info = pinfo; |
1258 |
struct ucontext *uc = puc;
|
1259 |
unsigned long pc; |
1260 |
|
1261 |
pc = uc->uc_mcontext.gregs[REG_RIP]; |
1262 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
1263 |
uc->uc_mcontext.gregs[REG_TRAPNO] == 0xe ?
|
1264 |
(uc->uc_mcontext.gregs[REG_ERR] >> 1) & 1 : 0, |
1265 |
&uc->uc_sigmask, puc); |
1266 |
} |
1267 |
|
1268 |
#elif defined(__powerpc__)
|
1269 |
|
1270 |
/***********************************************************************
|
1271 |
* signal context platform-specific definitions
|
1272 |
* From Wine
|
1273 |
*/
|
1274 |
#ifdef linux
|
1275 |
/* All Registers access - only for local access */
|
1276 |
# define REG_sig(reg_name, context) ((context)->uc_mcontext.regs->reg_name)
|
1277 |
/* Gpr Registers access */
|
1278 |
# define GPR_sig(reg_num, context) REG_sig(gpr[reg_num], context)
|
1279 |
# define IAR_sig(context) REG_sig(nip, context) /* Program counter */ |
1280 |
# define MSR_sig(context) REG_sig(msr, context) /* Machine State Register (Supervisor) */ |
1281 |
# define CTR_sig(context) REG_sig(ctr, context) /* Count register */ |
1282 |
# define XER_sig(context) REG_sig(xer, context) /* User's integer exception register */ |
1283 |
# define LR_sig(context) REG_sig(link, context) /* Link register */ |
1284 |
# define CR_sig(context) REG_sig(ccr, context) /* Condition register */ |
1285 |
/* Float Registers access */
|
1286 |
# define FLOAT_sig(reg_num, context) (((double*)((char*)((context)->uc_mcontext.regs+48*4)))[reg_num]) |
1287 |
# define FPSCR_sig(context) (*(int*)((char*)((context)->uc_mcontext.regs+(48+32*2)*4))) |
1288 |
/* Exception Registers access */
|
1289 |
# define DAR_sig(context) REG_sig(dar, context)
|
1290 |
# define DSISR_sig(context) REG_sig(dsisr, context)
|
1291 |
# define TRAP_sig(context) REG_sig(trap, context)
|
1292 |
#endif /* linux */ |
1293 |
|
1294 |
#ifdef __APPLE__
|
1295 |
# include <sys/ucontext.h> |
1296 |
typedef struct ucontext SIGCONTEXT; |
1297 |
/* All Registers access - only for local access */
|
1298 |
# define REG_sig(reg_name, context) ((context)->uc_mcontext->ss.reg_name)
|
1299 |
# define FLOATREG_sig(reg_name, context) ((context)->uc_mcontext->fs.reg_name)
|
1300 |
# define EXCEPREG_sig(reg_name, context) ((context)->uc_mcontext->es.reg_name)
|
1301 |
# define VECREG_sig(reg_name, context) ((context)->uc_mcontext->vs.reg_name)
|
1302 |
/* Gpr Registers access */
|
1303 |
# define GPR_sig(reg_num, context) REG_sig(r##reg_num, context) |
1304 |
# define IAR_sig(context) REG_sig(srr0, context) /* Program counter */ |
1305 |
# define MSR_sig(context) REG_sig(srr1, context) /* Machine State Register (Supervisor) */ |
1306 |
# define CTR_sig(context) REG_sig(ctr, context)
|
1307 |
# define XER_sig(context) REG_sig(xer, context) /* Link register */ |
1308 |
# define LR_sig(context) REG_sig(lr, context) /* User's integer exception register */ |
1309 |
# define CR_sig(context) REG_sig(cr, context) /* Condition register */ |
1310 |
/* Float Registers access */
|
1311 |
# define FLOAT_sig(reg_num, context) FLOATREG_sig(fpregs[reg_num], context)
|
1312 |
# define FPSCR_sig(context) ((double)FLOATREG_sig(fpscr, context)) |
1313 |
/* Exception Registers access */
|
1314 |
# define DAR_sig(context) EXCEPREG_sig(dar, context) /* Fault registers for coredump */ |
1315 |
# define DSISR_sig(context) EXCEPREG_sig(dsisr, context)
|
1316 |
# define TRAP_sig(context) EXCEPREG_sig(exception, context) /* number of powerpc exception taken */ |
1317 |
#endif /* __APPLE__ */ |
1318 |
|
1319 |
int cpu_signal_handler(int host_signum, void *pinfo, |
1320 |
void *puc)
|
1321 |
{ |
1322 |
siginfo_t *info = pinfo; |
1323 |
struct ucontext *uc = puc;
|
1324 |
unsigned long pc; |
1325 |
int is_write;
|
1326 |
|
1327 |
pc = IAR_sig(uc); |
1328 |
is_write = 0;
|
1329 |
#if 0
|
1330 |
/* ppc 4xx case */
|
1331 |
if (DSISR_sig(uc) & 0x00800000)
|
1332 |
is_write = 1;
|
1333 |
#else
|
1334 |
if (TRAP_sig(uc) != 0x400 && (DSISR_sig(uc) & 0x02000000)) |
1335 |
is_write = 1;
|
1336 |
#endif
|
1337 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
1338 |
is_write, &uc->uc_sigmask, puc); |
1339 |
} |
1340 |
|
1341 |
#elif defined(__alpha__)
|
1342 |
|
1343 |
int cpu_signal_handler(int host_signum, void *pinfo, |
1344 |
void *puc)
|
1345 |
{ |
1346 |
siginfo_t *info = pinfo; |
1347 |
struct ucontext *uc = puc;
|
1348 |
uint32_t *pc = uc->uc_mcontext.sc_pc; |
1349 |
uint32_t insn = *pc; |
1350 |
int is_write = 0; |
1351 |
|
1352 |
/* XXX: need kernel patch to get write flag faster */
|
1353 |
switch (insn >> 26) { |
1354 |
case 0x0d: // stw |
1355 |
case 0x0e: // stb |
1356 |
case 0x0f: // stq_u |
1357 |
case 0x24: // stf |
1358 |
case 0x25: // stg |
1359 |
case 0x26: // sts |
1360 |
case 0x27: // stt |
1361 |
case 0x2c: // stl |
1362 |
case 0x2d: // stq |
1363 |
case 0x2e: // stl_c |
1364 |
case 0x2f: // stq_c |
1365 |
is_write = 1;
|
1366 |
} |
1367 |
|
1368 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
1369 |
is_write, &uc->uc_sigmask, puc); |
1370 |
} |
1371 |
#elif defined(__sparc__)
|
1372 |
|
1373 |
int cpu_signal_handler(int host_signum, void *pinfo, |
1374 |
void *puc)
|
1375 |
{ |
1376 |
siginfo_t *info = pinfo; |
1377 |
uint32_t *regs = (uint32_t *)(info + 1);
|
1378 |
void *sigmask = (regs + 20); |
1379 |
unsigned long pc; |
1380 |
int is_write;
|
1381 |
uint32_t insn; |
1382 |
|
1383 |
/* XXX: is there a standard glibc define ? */
|
1384 |
pc = regs[1];
|
1385 |
/* XXX: need kernel patch to get write flag faster */
|
1386 |
is_write = 0;
|
1387 |
insn = *(uint32_t *)pc; |
1388 |
if ((insn >> 30) == 3) { |
1389 |
switch((insn >> 19) & 0x3f) { |
1390 |
case 0x05: // stb |
1391 |
case 0x06: // sth |
1392 |
case 0x04: // st |
1393 |
case 0x07: // std |
1394 |
case 0x24: // stf |
1395 |
case 0x27: // stdf |
1396 |
case 0x25: // stfsr |
1397 |
is_write = 1;
|
1398 |
break;
|
1399 |
} |
1400 |
} |
1401 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
1402 |
is_write, sigmask, NULL);
|
1403 |
} |
1404 |
|
1405 |
#elif defined(__arm__)
|
1406 |
|
1407 |
int cpu_signal_handler(int host_signum, void *pinfo, |
1408 |
void *puc)
|
1409 |
{ |
1410 |
siginfo_t *info = pinfo; |
1411 |
struct ucontext *uc = puc;
|
1412 |
unsigned long pc; |
1413 |
int is_write;
|
1414 |
|
1415 |
pc = uc->uc_mcontext.gregs[R15]; |
1416 |
/* XXX: compute is_write */
|
1417 |
is_write = 0;
|
1418 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
1419 |
is_write, |
1420 |
&uc->uc_sigmask, puc); |
1421 |
} |
1422 |
|
1423 |
#elif defined(__mc68000)
|
1424 |
|
1425 |
int cpu_signal_handler(int host_signum, void *pinfo, |
1426 |
void *puc)
|
1427 |
{ |
1428 |
siginfo_t *info = pinfo; |
1429 |
struct ucontext *uc = puc;
|
1430 |
unsigned long pc; |
1431 |
int is_write;
|
1432 |
|
1433 |
pc = uc->uc_mcontext.gregs[16];
|
1434 |
/* XXX: compute is_write */
|
1435 |
is_write = 0;
|
1436 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
1437 |
is_write, |
1438 |
&uc->uc_sigmask, puc); |
1439 |
} |
1440 |
|
1441 |
#elif defined(__ia64)
|
1442 |
|
1443 |
#ifndef __ISR_VALID
|
1444 |
/* This ought to be in <bits/siginfo.h>... */
|
1445 |
# define __ISR_VALID 1 |
1446 |
#endif
|
1447 |
|
1448 |
int cpu_signal_handler(int host_signum, void *pinfo, void *puc) |
1449 |
{ |
1450 |
siginfo_t *info = pinfo; |
1451 |
struct ucontext *uc = puc;
|
1452 |
unsigned long ip; |
1453 |
int is_write = 0; |
1454 |
|
1455 |
ip = uc->uc_mcontext.sc_ip; |
1456 |
switch (host_signum) {
|
1457 |
case SIGILL:
|
1458 |
case SIGFPE:
|
1459 |
case SIGSEGV:
|
1460 |
case SIGBUS:
|
1461 |
case SIGTRAP:
|
1462 |
if (info->si_code && (info->si_segvflags & __ISR_VALID))
|
1463 |
/* ISR.W (write-access) is bit 33: */
|
1464 |
is_write = (info->si_isr >> 33) & 1; |
1465 |
break;
|
1466 |
|
1467 |
default:
|
1468 |
break;
|
1469 |
} |
1470 |
return handle_cpu_signal(ip, (unsigned long)info->si_addr, |
1471 |
is_write, |
1472 |
&uc->uc_sigmask, puc); |
1473 |
} |
1474 |
|
1475 |
#elif defined(__s390__)
|
1476 |
|
1477 |
int cpu_signal_handler(int host_signum, void *pinfo, |
1478 |
void *puc)
|
1479 |
{ |
1480 |
siginfo_t *info = pinfo; |
1481 |
struct ucontext *uc = puc;
|
1482 |
unsigned long pc; |
1483 |
int is_write;
|
1484 |
|
1485 |
pc = uc->uc_mcontext.psw.addr; |
1486 |
/* XXX: compute is_write */
|
1487 |
is_write = 0;
|
1488 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
1489 |
is_write, &uc->uc_sigmask, puc); |
1490 |
} |
1491 |
|
1492 |
#elif defined(__mips__)
|
1493 |
|
1494 |
int cpu_signal_handler(int host_signum, void *pinfo, |
1495 |
void *puc)
|
1496 |
{ |
1497 |
siginfo_t *info = pinfo; |
1498 |
struct ucontext *uc = puc;
|
1499 |
greg_t pc = uc->uc_mcontext.pc; |
1500 |
int is_write;
|
1501 |
|
1502 |
/* XXX: compute is_write */
|
1503 |
is_write = 0;
|
1504 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
1505 |
is_write, &uc->uc_sigmask, puc); |
1506 |
} |
1507 |
|
1508 |
#elif defined(__hppa__)
|
1509 |
|
1510 |
int cpu_signal_handler(int host_signum, void *pinfo, |
1511 |
void *puc)
|
1512 |
{ |
1513 |
struct siginfo *info = pinfo;
|
1514 |
struct ucontext *uc = puc;
|
1515 |
unsigned long pc; |
1516 |
int is_write;
|
1517 |
|
1518 |
pc = uc->uc_mcontext.sc_iaoq[0];
|
1519 |
/* FIXME: compute is_write */
|
1520 |
is_write = 0;
|
1521 |
return handle_cpu_signal(pc, (unsigned long)info->si_addr, |
1522 |
is_write, |
1523 |
&uc->uc_sigmask, puc); |
1524 |
} |
1525 |
|
1526 |
#else
|
1527 |
|
1528 |
#error host CPU specific signal handler needed
|
1529 |
|
1530 |
#endif
|
1531 |
|
1532 |
#endif /* !defined(CONFIG_SOFTMMU) */ |