- && mr != &io_mem_watch;
-}
-
-#define mmap_lock() do { } while(0)
-#define mmap_unlock() do { } while(0)
-#endif
-
-#if defined(CONFIG_USER_ONLY)
-/* Currently it is not recommended to allocate big chunks of data in
- user mode. It will change when a dedicated libc will be used. */
-/* ??? 64-bit hosts ought to have no problem mmaping data outside the
- region in which the guest needs to run. Revisit this. */
-#define USE_STATIC_CODE_GEN_BUFFER
-#endif
-
-/* ??? Should configure for this, not list operating systems here. */
-#if (defined(__linux__) \
- || defined(__FreeBSD__) || defined(__FreeBSD_kernel__) \
- || defined(__DragonFly__) || defined(__OpenBSD__) \
- || defined(__NetBSD__))
-# define USE_MMAP
-#endif
-
-/* Minimum size of the code gen buffer. This number is randomly chosen,
- but not so small that we can't have a fair number of TB's live. */
-#define MIN_CODE_GEN_BUFFER_SIZE (1024u * 1024)
-
-/* Maximum size of the code gen buffer we'd like to use. Unless otherwise
- indicated, this is constrained by the range of direct branches on the
- host cpu, as used by the TCG implementation of goto_tb. */
-#if defined(__x86_64__)
-# define MAX_CODE_GEN_BUFFER_SIZE (2ul * 1024 * 1024 * 1024)
-#elif defined(__sparc__)
-# define MAX_CODE_GEN_BUFFER_SIZE (2ul * 1024 * 1024 * 1024)
-#elif defined(__arm__)
-# define MAX_CODE_GEN_BUFFER_SIZE (16u * 1024 * 1024)
-#elif defined(__s390x__)
- /* We have a +- 4GB range on the branches; leave some slop. */
-# define MAX_CODE_GEN_BUFFER_SIZE (3ul * 1024 * 1024 * 1024)
-#else
-# define MAX_CODE_GEN_BUFFER_SIZE ((size_t)-1)
-#endif
-
-#define DEFAULT_CODE_GEN_BUFFER_SIZE_1 (32u * 1024 * 1024)
-
-#define DEFAULT_CODE_GEN_BUFFER_SIZE \
- (DEFAULT_CODE_GEN_BUFFER_SIZE_1 < MAX_CODE_GEN_BUFFER_SIZE \
- ? DEFAULT_CODE_GEN_BUFFER_SIZE_1 : MAX_CODE_GEN_BUFFER_SIZE)
-
-static inline size_t size_code_gen_buffer(size_t tb_size)
-{
- /* Size the buffer. */
- if (tb_size == 0) {
-#ifdef USE_STATIC_CODE_GEN_BUFFER
- tb_size = DEFAULT_CODE_GEN_BUFFER_SIZE;
-#else
- /* ??? Needs adjustments. */
- /* ??? If we relax the requirement that CONFIG_USER_ONLY use the
- static buffer, we could size this on RESERVED_VA, on the text
- segment size of the executable, or continue to use the default. */
- tb_size = (unsigned long)(ram_size / 4);
-#endif
- }
- if (tb_size < MIN_CODE_GEN_BUFFER_SIZE) {
- tb_size = MIN_CODE_GEN_BUFFER_SIZE;
- }
- if (tb_size > MAX_CODE_GEN_BUFFER_SIZE) {
- tb_size = MAX_CODE_GEN_BUFFER_SIZE;
- }
- code_gen_buffer_size = tb_size;
- return tb_size;
-}
-
-#ifdef USE_STATIC_CODE_GEN_BUFFER
-static uint8_t static_code_gen_buffer[DEFAULT_CODE_GEN_BUFFER_SIZE]
- __attribute__((aligned(CODE_GEN_ALIGN)));
-
-static inline void *alloc_code_gen_buffer(void)
-{
- map_exec(static_code_gen_buffer, code_gen_buffer_size);
- return static_code_gen_buffer;
-}
-#elif defined(USE_MMAP)
-static inline void *alloc_code_gen_buffer(void)
-{
- int flags = MAP_PRIVATE | MAP_ANONYMOUS;
- uintptr_t start = 0;
- void *buf;
-
- /* Constrain the position of the buffer based on the host cpu.
- Note that these addresses are chosen in concert with the
- addresses assigned in the relevant linker script file. */
-# if defined(__PIE__) || defined(__PIC__)
- /* Don't bother setting a preferred location if we're building
- a position-independent executable. We're more likely to get
- an address near the main executable if we let the kernel
- choose the address. */
-# elif defined(__x86_64__) && defined(MAP_32BIT)
- /* Force the memory down into low memory with the executable.
- Leave the choice of exact location with the kernel. */
- flags |= MAP_32BIT;
- /* Cannot expect to map more than 800MB in low memory. */
- if (code_gen_buffer_size > 800u * 1024 * 1024) {
- code_gen_buffer_size = 800u * 1024 * 1024;
- }
-# elif defined(__sparc__)
- start = 0x40000000ul;
-# elif defined(__s390x__)
- start = 0x90000000ul;
-# endif
-
- buf = mmap((void *)start, code_gen_buffer_size,
- PROT_WRITE | PROT_READ | PROT_EXEC, flags, -1, 0);
- return buf == MAP_FAILED ? NULL : buf;
-}
-#else
-static inline void *alloc_code_gen_buffer(void)
-{
- void *buf = g_malloc(code_gen_buffer_size);
-
- if (buf) {
- map_exec(buf, code_gen_buffer_size);
- }
- return buf;
-}
-#endif /* USE_STATIC_CODE_GEN_BUFFER, USE_MMAP */
-
-static inline void code_gen_alloc(size_t tb_size)
-{
- code_gen_buffer_size = size_code_gen_buffer(tb_size);
- code_gen_buffer = alloc_code_gen_buffer();
- if (code_gen_buffer == NULL) {
- fprintf(stderr, "Could not allocate dynamic translator buffer\n");
- exit(1);
- }
-
- qemu_madvise(code_gen_buffer, code_gen_buffer_size, QEMU_MADV_HUGEPAGE);
-
- /* Steal room for the prologue at the end of the buffer. This ensures
- (via the MAX_CODE_GEN_BUFFER_SIZE limits above) that direct branches
- from TB's to the prologue are going to be in range. It also means
- that we don't need to mark (additional) portions of the data segment
- as executable. */
- code_gen_prologue = code_gen_buffer + code_gen_buffer_size - 1024;
- code_gen_buffer_size -= 1024;
-
- code_gen_buffer_max_size = code_gen_buffer_size -
- (TCG_MAX_OP_SIZE * OPC_BUF_SIZE);
- code_gen_max_blocks = code_gen_buffer_size / CODE_GEN_AVG_BLOCK_SIZE;
- tbs = g_malloc(code_gen_max_blocks * sizeof(TranslationBlock));
-}
-
-/* Must be called before using the QEMU cpus. 'tb_size' is the size
- (in bytes) allocated to the translation buffer. Zero means default
- size. */
-void tcg_exec_init(unsigned long tb_size)
-{
- cpu_gen_init();
- code_gen_alloc(tb_size);
- code_gen_ptr = code_gen_buffer;
- tcg_register_jit(code_gen_buffer, code_gen_buffer_size);
- page_init();
-#if !defined(CONFIG_USER_ONLY) || !defined(CONFIG_USE_GUEST_BASE)
- /* There's no guest base to take into account, so go ahead and
- initialize the prologue now. */
- tcg_prologue_init(&tcg_ctx);
-#endif
-}
-
-bool tcg_enabled(void)
-{
- return code_gen_buffer != NULL;
-}
-
-void cpu_exec_init_all(void)
-{
-#if !defined(CONFIG_USER_ONLY)
- memory_map_init();
- io_mem_init();
-#endif
-}
-
-#if defined(CPU_SAVE_VERSION) && !defined(CONFIG_USER_ONLY)
-
-static int cpu_common_post_load(void *opaque, int version_id)
-{
- CPUArchState *env = opaque;
-
- /* 0x01 was CPU_INTERRUPT_EXIT. This line can be removed when the
- version_id is increased. */
- env->interrupt_request &= ~0x01;
- tlb_flush(env, 1);
-
- return 0;
-}
-
-static const VMStateDescription vmstate_cpu_common = {
- .name = "cpu_common",
- .version_id = 1,
- .minimum_version_id = 1,
- .minimum_version_id_old = 1,
- .post_load = cpu_common_post_load,
- .fields = (VMStateField []) {
- VMSTATE_UINT32(halted, CPUArchState),
- VMSTATE_UINT32(interrupt_request, CPUArchState),
- VMSTATE_END_OF_LIST()
- }
-};
-#endif
-
-CPUArchState *qemu_get_cpu(int cpu)
-{
- CPUArchState *env = first_cpu;
-
- while (env) {
- if (env->cpu_index == cpu)
- break;
- env = env->next_cpu;
- }
-
- return env;
-}
-
-void cpu_exec_init(CPUArchState *env)
-{
-#ifndef CONFIG_USER_ONLY
- CPUState *cpu = ENV_GET_CPU(env);
-#endif
- CPUArchState **penv;
- int cpu_index;
-
-#if defined(CONFIG_USER_ONLY)
- cpu_list_lock();
-#endif
- env->next_cpu = NULL;
- penv = &first_cpu;
- cpu_index = 0;
- while (*penv != NULL) {
- penv = &(*penv)->next_cpu;
- cpu_index++;
- }
- env->cpu_index = cpu_index;
- env->numa_node = 0;
- QTAILQ_INIT(&env->breakpoints);
- QTAILQ_INIT(&env->watchpoints);
-#ifndef CONFIG_USER_ONLY
- cpu->thread_id = qemu_get_thread_id();
-#endif
- *penv = env;
-#if defined(CONFIG_USER_ONLY)
- cpu_list_unlock();
-#endif
-#if defined(CPU_SAVE_VERSION) && !defined(CONFIG_USER_ONLY)
- vmstate_register(NULL, cpu_index, &vmstate_cpu_common, env);
- register_savevm(NULL, "cpu", cpu_index, CPU_SAVE_VERSION,
- cpu_save, cpu_load, env);
-#endif
-}
-
-/* Allocate a new translation block. Flush the translation buffer if
- too many translation blocks or too much generated code. */
-static TranslationBlock *tb_alloc(target_ulong pc)
-{
- TranslationBlock *tb;
-
- if (nb_tbs >= code_gen_max_blocks ||
- (code_gen_ptr - code_gen_buffer) >= code_gen_buffer_max_size) {
- return NULL;
- }
- tb = &tbs[nb_tbs++];
- tb->pc = pc;
- tb->cflags = 0;
- return tb;
-}
-
-void tb_free(TranslationBlock *tb)
-{
- /* In practice this is mostly used for single use temporary TB
- Ignore the hard cases and just back up if this TB happens to
- be the last one generated. */
- if (nb_tbs > 0 && tb == &tbs[nb_tbs - 1]) {
- code_gen_ptr = tb->tc_ptr;
- nb_tbs--;
- }
-}
-
-static inline void invalidate_page_bitmap(PageDesc *p)
-{
- if (p->code_bitmap) {
- g_free(p->code_bitmap);
- p->code_bitmap = NULL;
- }
- p->code_write_count = 0;
-}
-
-/* Set to NULL all the 'first_tb' fields in all PageDescs. */
-static void page_flush_tb_1(int level, void **lp)
-{
- int i;
-
- if (*lp == NULL) {
- return;
- }
- if (level == 0) {
- PageDesc *pd = *lp;
-
- for (i = 0; i < L2_SIZE; ++i) {
- pd[i].first_tb = NULL;
- invalidate_page_bitmap(pd + i);
- }
- } else {
- void **pp = *lp;
-
- for (i = 0; i < L2_SIZE; ++i) {
- page_flush_tb_1(level - 1, pp + i);
- }
- }
-}
-
-static void page_flush_tb(void)
-{
- int i;
-
- for (i = 0; i < V_L1_SIZE; i++) {
- page_flush_tb_1(V_L1_SHIFT / L2_BITS - 1, l1_map + i);
- }
-}
-
-/* flush all the translation blocks */
-/* XXX: tb_flush is currently not thread safe */
-void tb_flush(CPUArchState *env1)
-{
- CPUArchState *env;
-
-#if defined(DEBUG_FLUSH)
- printf("qemu: flush code_size=%ld nb_tbs=%d avg_tb_size=%ld\n",
- (unsigned long)(code_gen_ptr - code_gen_buffer),
- nb_tbs, nb_tbs > 0 ?
- ((unsigned long)(code_gen_ptr - code_gen_buffer)) / nb_tbs : 0);
-#endif
- if ((unsigned long)(code_gen_ptr - code_gen_buffer)
- > code_gen_buffer_size) {
- cpu_abort(env1, "Internal error: code buffer overflow\n");
- }
- nb_tbs = 0;
-
- for (env = first_cpu; env != NULL; env = env->next_cpu) {
- memset(env->tb_jmp_cache, 0, TB_JMP_CACHE_SIZE * sizeof(void *));
- }
-
- memset(tb_phys_hash, 0, CODE_GEN_PHYS_HASH_SIZE * sizeof(void *));
- page_flush_tb();
-
- code_gen_ptr = code_gen_buffer;
- /* XXX: flush processor icache at this point if cache flush is
- expensive */
- tb_flush_count++;
-}
-
-#ifdef DEBUG_TB_CHECK
-
-static void tb_invalidate_check(target_ulong address)
-{
- TranslationBlock *tb;
- int i;
-
- address &= TARGET_PAGE_MASK;
- for (i = 0; i < CODE_GEN_PHYS_HASH_SIZE; i++) {
- for (tb = tb_phys_hash[i]; tb != NULL; tb = tb->phys_hash_next) {
- if (!(address + TARGET_PAGE_SIZE <= tb->pc ||
- address >= tb->pc + tb->size)) {
- printf("ERROR invalidate: address=" TARGET_FMT_lx
- " PC=%08lx size=%04x\n",
- address, (long)tb->pc, tb->size);
- }
- }
- }
-}
-
-/* verify that all the pages have correct rights for code */
-static void tb_page_check(void)
-{
- TranslationBlock *tb;
- int i, flags1, flags2;
-
- for (i = 0; i < CODE_GEN_PHYS_HASH_SIZE; i++) {
- for (tb = tb_phys_hash[i]; tb != NULL; tb = tb->phys_hash_next) {
- flags1 = page_get_flags(tb->pc);
- flags2 = page_get_flags(tb->pc + tb->size - 1);
- if ((flags1 & PAGE_WRITE) || (flags2 & PAGE_WRITE)) {
- printf("ERROR page flags: PC=%08lx size=%04x f1=%x f2=%x\n",
- (long)tb->pc, tb->size, flags1, flags2);
- }
- }
- }
-}
-
-#endif
-
-
-/* invalidate one TB */
-static inline void tb_remove(TranslationBlock **ptb, TranslationBlock *tb,
- int next_offset)
-{
- TranslationBlock *tb1;
-
- for (;;) {
- tb1 = *ptb;
- if (tb1 == tb) {
- *ptb = *(TranslationBlock **)((char *)tb1 + next_offset);
- break;
- }
- ptb = (TranslationBlock **)((char *)tb1 + next_offset);
- }
-}
-
-static inline void tb_page_remove(TranslationBlock **ptb, TranslationBlock *tb)
-{
- TranslationBlock *tb1;
- unsigned int n1;
-
- for (;;) {
- tb1 = *ptb;
- n1 = (uintptr_t)tb1 & 3;
- tb1 = (TranslationBlock *)((uintptr_t)tb1 & ~3);
- if (tb1 == tb) {
- *ptb = tb1->page_next[n1];
- break;
- }
- ptb = &tb1->page_next[n1];
- }
-}
-
-static inline void tb_jmp_remove(TranslationBlock *tb, int n)
-{
- TranslationBlock *tb1, **ptb;
- unsigned int n1;
-
- ptb = &tb->jmp_next[n];
- tb1 = *ptb;
- if (tb1) {
- /* find tb(n) in circular list */
- for (;;) {
- tb1 = *ptb;
- n1 = (uintptr_t)tb1 & 3;
- tb1 = (TranslationBlock *)((uintptr_t)tb1 & ~3);
- if (n1 == n && tb1 == tb) {
- break;
- }
- if (n1 == 2) {
- ptb = &tb1->jmp_first;
- } else {
- ptb = &tb1->jmp_next[n1];
- }
- }
- /* now we can suppress tb(n) from the list */
- *ptb = tb->jmp_next[n];
-
- tb->jmp_next[n] = NULL;
- }
-}
-
-/* reset the jump entry 'n' of a TB so that it is not chained to
- another TB */
-static inline void tb_reset_jump(TranslationBlock *tb, int n)
-{
- tb_set_jmp_target(tb, n, (uintptr_t)(tb->tc_ptr + tb->tb_next_offset[n]));
-}
-
-void tb_phys_invalidate(TranslationBlock *tb, tb_page_addr_t page_addr)
-{
- CPUArchState *env;
- PageDesc *p;
- unsigned int h, n1;
- tb_page_addr_t phys_pc;
- TranslationBlock *tb1, *tb2;
-
- /* remove the TB from the hash list */
- phys_pc = tb->page_addr[0] + (tb->pc & ~TARGET_PAGE_MASK);
- h = tb_phys_hash_func(phys_pc);
- tb_remove(&tb_phys_hash[h], tb,
- offsetof(TranslationBlock, phys_hash_next));
-
- /* remove the TB from the page list */
- if (tb->page_addr[0] != page_addr) {
- p = page_find(tb->page_addr[0] >> TARGET_PAGE_BITS);
- tb_page_remove(&p->first_tb, tb);
- invalidate_page_bitmap(p);
- }
- if (tb->page_addr[1] != -1 && tb->page_addr[1] != page_addr) {
- p = page_find(tb->page_addr[1] >> TARGET_PAGE_BITS);
- tb_page_remove(&p->first_tb, tb);
- invalidate_page_bitmap(p);
- }
-
- tb_invalidated_flag = 1;
-
- /* remove the TB from the hash list */
- h = tb_jmp_cache_hash_func(tb->pc);
- for (env = first_cpu; env != NULL; env = env->next_cpu) {
- if (env->tb_jmp_cache[h] == tb) {
- env->tb_jmp_cache[h] = NULL;
- }
- }
-
- /* suppress this TB from the two jump lists */
- tb_jmp_remove(tb, 0);
- tb_jmp_remove(tb, 1);
-
- /* suppress any remaining jumps to this TB */
- tb1 = tb->jmp_first;
- for (;;) {
- n1 = (uintptr_t)tb1 & 3;
- if (n1 == 2) {
- break;
- }
- tb1 = (TranslationBlock *)((uintptr_t)tb1 & ~3);
- tb2 = tb1->jmp_next[n1];
- tb_reset_jump(tb1, n1);
- tb1->jmp_next[n1] = NULL;
- tb1 = tb2;
- }
- tb->jmp_first = (TranslationBlock *)((uintptr_t)tb | 2); /* fail safe */
-
- tb_phys_invalidate_count++;
-}
-
-static inline void set_bits(uint8_t *tab, int start, int len)
-{
- int end, mask, end1;
-
- end = start + len;
- tab += start >> 3;
- mask = 0xff << (start & 7);
- if ((start & ~7) == (end & ~7)) {
- if (start < end) {
- mask &= ~(0xff << (end & 7));
- *tab |= mask;
- }
- } else {
- *tab++ |= mask;
- start = (start + 8) & ~7;
- end1 = end & ~7;
- while (start < end1) {
- *tab++ = 0xff;
- start += 8;
- }
- if (start < end) {
- mask = ~(0xff << (end & 7));
- *tab |= mask;
- }
- }
-}
-
-static void build_page_bitmap(PageDesc *p)
-{
- int n, tb_start, tb_end;
- TranslationBlock *tb;
-
- p->code_bitmap = g_malloc0(TARGET_PAGE_SIZE / 8);
-
- tb = p->first_tb;
- while (tb != NULL) {
- n = (uintptr_t)tb & 3;
- tb = (TranslationBlock *)((uintptr_t)tb & ~3);
- /* NOTE: this is subtle as a TB may span two physical pages */
- if (n == 0) {
- /* NOTE: tb_end may be after the end of the page, but
- it is not a problem */
- tb_start = tb->pc & ~TARGET_PAGE_MASK;
- tb_end = tb_start + tb->size;
- if (tb_end > TARGET_PAGE_SIZE) {
- tb_end = TARGET_PAGE_SIZE;
- }
- } else {
- tb_start = 0;
- tb_end = ((tb->pc + tb->size) & ~TARGET_PAGE_MASK);
- }
- set_bits(p->code_bitmap, tb_start, tb_end - tb_start);
- tb = tb->page_next[n];
- }
-}
-
-TranslationBlock *tb_gen_code(CPUArchState *env,
- target_ulong pc, target_ulong cs_base,
- int flags, int cflags)
-{
- TranslationBlock *tb;
- uint8_t *tc_ptr;
- tb_page_addr_t phys_pc, phys_page2;
- target_ulong virt_page2;
- int code_gen_size;
-
- phys_pc = get_page_addr_code(env, pc);
- tb = tb_alloc(pc);
- if (!tb) {
- /* flush must be done */
- tb_flush(env);
- /* cannot fail at this point */
- tb = tb_alloc(pc);
- /* Don't forget to invalidate previous TB info. */
- tb_invalidated_flag = 1;
- }
- tc_ptr = code_gen_ptr;
- tb->tc_ptr = tc_ptr;
- tb->cs_base = cs_base;
- tb->flags = flags;
- tb->cflags = cflags;
- cpu_gen_code(env, tb, &code_gen_size);
- code_gen_ptr = (void *)(((uintptr_t)code_gen_ptr + code_gen_size +
- CODE_GEN_ALIGN - 1) & ~(CODE_GEN_ALIGN - 1));
-
- /* check next page if needed */
- virt_page2 = (pc + tb->size - 1) & TARGET_PAGE_MASK;
- phys_page2 = -1;
- if ((pc & TARGET_PAGE_MASK) != virt_page2) {
- phys_page2 = get_page_addr_code(env, virt_page2);
- }
- tb_link_page(tb, phys_pc, phys_page2);
- return tb;
-}
-
-/*
- * Invalidate all TBs which intersect with the target physical address range
- * [start;end[. NOTE: start and end may refer to *different* physical pages.
- * 'is_cpu_write_access' should be true if called from a real cpu write
- * access: the virtual CPU will exit the current TB if code is modified inside
- * this TB.
- */
-void tb_invalidate_phys_range(tb_page_addr_t start, tb_page_addr_t end,
- int is_cpu_write_access)
-{
- while (start < end) {
- tb_invalidate_phys_page_range(start, end, is_cpu_write_access);
- start &= TARGET_PAGE_MASK;
- start += TARGET_PAGE_SIZE;
- }
-}
-
-/*
- * Invalidate all TBs which intersect with the target physical address range
- * [start;end[. NOTE: start and end must refer to the *same* physical page.
- * 'is_cpu_write_access' should be true if called from a real cpu write
- * access: the virtual CPU will exit the current TB if code is modified inside
- * this TB.
- */
-void tb_invalidate_phys_page_range(tb_page_addr_t start, tb_page_addr_t end,
- int is_cpu_write_access)
-{
- TranslationBlock *tb, *tb_next, *saved_tb;
- CPUArchState *env = cpu_single_env;
- tb_page_addr_t tb_start, tb_end;
- PageDesc *p;
- int n;
-#ifdef TARGET_HAS_PRECISE_SMC
- int current_tb_not_found = is_cpu_write_access;
- TranslationBlock *current_tb = NULL;
- int current_tb_modified = 0;
- target_ulong current_pc = 0;
- target_ulong current_cs_base = 0;
- int current_flags = 0;
-#endif /* TARGET_HAS_PRECISE_SMC */
-
- p = page_find(start >> TARGET_PAGE_BITS);
- if (!p) {
- return;
- }
- if (!p->code_bitmap &&
- ++p->code_write_count >= SMC_BITMAP_USE_THRESHOLD &&
- is_cpu_write_access) {
- /* build code bitmap */
- build_page_bitmap(p);
- }
-
- /* we remove all the TBs in the range [start, end[ */
- /* XXX: see if in some cases it could be faster to invalidate all
- the code */
- tb = p->first_tb;
- while (tb != NULL) {
- n = (uintptr_t)tb & 3;
- tb = (TranslationBlock *)((uintptr_t)tb & ~3);
- tb_next = tb->page_next[n];
- /* NOTE: this is subtle as a TB may span two physical pages */
- if (n == 0) {
- /* NOTE: tb_end may be after the end of the page, but
- it is not a problem */
- tb_start = tb->page_addr[0] + (tb->pc & ~TARGET_PAGE_MASK);
- tb_end = tb_start + tb->size;
- } else {
- tb_start = tb->page_addr[1];
- tb_end = tb_start + ((tb->pc + tb->size) & ~TARGET_PAGE_MASK);
- }
- if (!(tb_end <= start || tb_start >= end)) {
-#ifdef TARGET_HAS_PRECISE_SMC
- if (current_tb_not_found) {
- current_tb_not_found = 0;
- current_tb = NULL;
- if (env->mem_io_pc) {
- /* now we have a real cpu fault */
- current_tb = tb_find_pc(env->mem_io_pc);
- }
- }
- if (current_tb == tb &&
- (current_tb->cflags & CF_COUNT_MASK) != 1) {
- /* If we are modifying the current TB, we must stop
- its execution. We could be more precise by checking
- that the modification is after the current PC, but it
- would require a specialized function to partially
- restore the CPU state */
-
- current_tb_modified = 1;
- cpu_restore_state(current_tb, env, env->mem_io_pc);
- cpu_get_tb_cpu_state(env, ¤t_pc, ¤t_cs_base,
- ¤t_flags);
- }
-#endif /* TARGET_HAS_PRECISE_SMC */
- /* we need to do that to handle the case where a signal
- occurs while doing tb_phys_invalidate() */
- saved_tb = NULL;
- if (env) {
- saved_tb = env->current_tb;
- env->current_tb = NULL;
- }
- tb_phys_invalidate(tb, -1);
- if (env) {
- env->current_tb = saved_tb;
- if (env->interrupt_request && env->current_tb) {
- cpu_interrupt(env, env->interrupt_request);
- }
- }
- }
- tb = tb_next;
- }
-#if !defined(CONFIG_USER_ONLY)
- /* if no code remaining, no need to continue to use slow writes */
- if (!p->first_tb) {
- invalidate_page_bitmap(p);
- if (is_cpu_write_access) {
- tlb_unprotect_code_phys(env, start, env->mem_io_vaddr);
- }
- }
-#endif
-#ifdef TARGET_HAS_PRECISE_SMC
- if (current_tb_modified) {
- /* we generate a block containing just the instruction
- modifying the memory. It will ensure that it cannot modify
- itself */
- env->current_tb = NULL;
- tb_gen_code(env, current_pc, current_cs_base, current_flags, 1);
- cpu_resume_from_signal(env, NULL);
- }
-#endif
-}
-
-/* len must be <= 8 and start must be a multiple of len */
-static inline void tb_invalidate_phys_page_fast(tb_page_addr_t start, int len)
-{
- PageDesc *p;
- int offset, b;
-
-#if 0
- if (1) {
- qemu_log("modifying code at 0x%x size=%d EIP=%x PC=%08x\n",
- cpu_single_env->mem_io_vaddr, len,
- cpu_single_env->eip,
- cpu_single_env->eip +
- (intptr_t)cpu_single_env->segs[R_CS].base);
- }
-#endif
- p = page_find(start >> TARGET_PAGE_BITS);
- if (!p) {
- return;
- }
- if (p->code_bitmap) {
- offset = start & ~TARGET_PAGE_MASK;
- b = p->code_bitmap[offset >> 3] >> (offset & 7);
- if (b & ((1 << len) - 1)) {
- goto do_invalidate;
- }
- } else {
- do_invalidate:
- tb_invalidate_phys_page_range(start, start + len, 1);
- }
-}
-
-#if !defined(CONFIG_SOFTMMU)
-static void tb_invalidate_phys_page(tb_page_addr_t addr,
- uintptr_t pc, void *puc)
-{
- TranslationBlock *tb;
- PageDesc *p;
- int n;
-#ifdef TARGET_HAS_PRECISE_SMC
- TranslationBlock *current_tb = NULL;
- CPUArchState *env = cpu_single_env;
- int current_tb_modified = 0;
- target_ulong current_pc = 0;
- target_ulong current_cs_base = 0;
- int current_flags = 0;
-#endif
-
- addr &= TARGET_PAGE_MASK;
- p = page_find(addr >> TARGET_PAGE_BITS);
- if (!p) {
- return;
- }
- tb = p->first_tb;
-#ifdef TARGET_HAS_PRECISE_SMC
- if (tb && pc != 0) {
- current_tb = tb_find_pc(pc);
- }
-#endif
- while (tb != NULL) {
- n = (uintptr_t)tb & 3;
- tb = (TranslationBlock *)((uintptr_t)tb & ~3);
-#ifdef TARGET_HAS_PRECISE_SMC
- if (current_tb == tb &&
- (current_tb->cflags & CF_COUNT_MASK) != 1) {
- /* If we are modifying the current TB, we must stop
- its execution. We could be more precise by checking
- that the modification is after the current PC, but it
- would require a specialized function to partially
- restore the CPU state */
-
- current_tb_modified = 1;
- cpu_restore_state(current_tb, env, pc);
- cpu_get_tb_cpu_state(env, ¤t_pc, ¤t_cs_base,
- ¤t_flags);
- }
-#endif /* TARGET_HAS_PRECISE_SMC */
- tb_phys_invalidate(tb, addr);
- tb = tb->page_next[n];
- }
- p->first_tb = NULL;
-#ifdef TARGET_HAS_PRECISE_SMC
- if (current_tb_modified) {
- /* we generate a block containing just the instruction
- modifying the memory. It will ensure that it cannot modify
- itself */
- env->current_tb = NULL;
- tb_gen_code(env, current_pc, current_cs_base, current_flags, 1);
- cpu_resume_from_signal(env, puc);
- }
-#endif
-}
-#endif
-
-/* add the tb in the target page and protect it if necessary */
-static inline void tb_alloc_page(TranslationBlock *tb,
- unsigned int n, tb_page_addr_t page_addr)
-{
- PageDesc *p;
-#ifndef CONFIG_USER_ONLY
- bool page_already_protected;
-#endif
-
- tb->page_addr[n] = page_addr;
- p = page_find_alloc(page_addr >> TARGET_PAGE_BITS, 1);
- tb->page_next[n] = p->first_tb;
-#ifndef CONFIG_USER_ONLY
- page_already_protected = p->first_tb != NULL;
-#endif
- p->first_tb = (TranslationBlock *)((uintptr_t)tb | n);
- invalidate_page_bitmap(p);
-
-#if defined(TARGET_HAS_SMC) || 1
-
-#if defined(CONFIG_USER_ONLY)
- if (p->flags & PAGE_WRITE) {
- target_ulong addr;
- PageDesc *p2;
- int prot;
-
- /* force the host page as non writable (writes will have a
- page fault + mprotect overhead) */
- page_addr &= qemu_host_page_mask;
- prot = 0;
- for (addr = page_addr; addr < page_addr + qemu_host_page_size;
- addr += TARGET_PAGE_SIZE) {
-
- p2 = page_find(addr >> TARGET_PAGE_BITS);
- if (!p2) {
- continue;
- }
- prot |= p2->flags;
- p2->flags &= ~PAGE_WRITE;
- }
- mprotect(g2h(page_addr), qemu_host_page_size,
- (prot & PAGE_BITS) & ~PAGE_WRITE);
-#ifdef DEBUG_TB_INVALIDATE
- printf("protecting code page: 0x" TARGET_FMT_lx "\n",
- page_addr);
-#endif
- }
-#else
- /* if some code is already present, then the pages are already
- protected. So we handle the case where only the first TB is
- allocated in a physical page */
- if (!page_already_protected) {
- tlb_protect_code(page_addr);
- }
-#endif
-
-#endif /* TARGET_HAS_SMC */
-}
-
-/* add a new TB and link it to the physical page tables. phys_page2 is
- (-1) to indicate that only one page contains the TB. */
-static void tb_link_page(TranslationBlock *tb, tb_page_addr_t phys_pc,
- tb_page_addr_t phys_page2)
-{
- unsigned int h;
- TranslationBlock **ptb;
-
- /* Grab the mmap lock to stop another thread invalidating this TB
- before we are done. */
- mmap_lock();
- /* add in the physical hash table */
- h = tb_phys_hash_func(phys_pc);
- ptb = &tb_phys_hash[h];
- tb->phys_hash_next = *ptb;
- *ptb = tb;
-
- /* add in the page list */
- tb_alloc_page(tb, 0, phys_pc & TARGET_PAGE_MASK);
- if (phys_page2 != -1) {
- tb_alloc_page(tb, 1, phys_page2);
- } else {
- tb->page_addr[1] = -1;
- }
-
- tb->jmp_first = (TranslationBlock *)((uintptr_t)tb | 2);
- tb->jmp_next[0] = NULL;
- tb->jmp_next[1] = NULL;
-
- /* init original jump addresses */
- if (tb->tb_next_offset[0] != 0xffff) {
- tb_reset_jump(tb, 0);
- }
- if (tb->tb_next_offset[1] != 0xffff) {
- tb_reset_jump(tb, 1);
- }
-
-#ifdef DEBUG_TB_CHECK
- tb_page_check();
-#endif
- mmap_unlock();