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merge self modifying code handling in dirty ram page mecanism

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1544 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2005-08-21 09:26:42 +00:00
parent 04c504cc4f
commit 3a7d929e62
1 changed files with 126 additions and 128 deletions
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254
exec.c
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@ -262,8 +262,10 @@ static inline PhysPageDesc *phys_page_find(target_phys_addr_t index)
}
#if !defined(CONFIG_USER_ONLY)
static void tlb_protect_code(CPUState *env, target_ulong addr);
static void tlb_unprotect_code_phys(CPUState *env, unsigned long phys_addr, target_ulong vaddr);
static void tlb_protect_code(CPUState *env, ram_addr_t ram_addr,
target_ulong vaddr);
static void tlb_unprotect_code_phys(CPUState *env, ram_addr_t ram_addr,
target_ulong vaddr);
static VirtPageDesc *virt_page_find_alloc(target_ulong index, int alloc)
{
@ -945,7 +947,7 @@ static inline void tb_alloc_page(TranslationBlock *tb,
TranslationBlock *last_first_tb;
tb->page_addr[n] = page_addr;
p = page_find(page_addr >> TARGET_PAGE_BITS);
p = page_find_alloc(page_addr >> TARGET_PAGE_BITS);
tb->page_next[n] = p->first_tb;
last_first_tb = p->first_tb;
p->first_tb = (TranslationBlock *)((long)tb | n);
@ -981,7 +983,7 @@ static inline void tb_alloc_page(TranslationBlock *tb,
target_ulong virt_addr;
virt_addr = (tb->pc & TARGET_PAGE_MASK) + (n << TARGET_PAGE_BITS);
tlb_protect_code(cpu_single_env, virt_addr);
tlb_protect_code(cpu_single_env, page_addr, virt_addr);
}
#endif
@ -1473,50 +1475,44 @@ static inline void tlb_protect_code1(CPUTLBEntry *tlb_entry, target_ulong addr)
{
if (addr == (tlb_entry->address &
(TARGET_PAGE_MASK | TLB_INVALID_MASK)) &&
(tlb_entry->address & ~TARGET_PAGE_MASK) != IO_MEM_CODE &&
(tlb_entry->address & ~TARGET_PAGE_MASK) != IO_MEM_ROM) {
tlb_entry->address = (tlb_entry->address & TARGET_PAGE_MASK) | IO_MEM_CODE;
(tlb_entry->address & ~TARGET_PAGE_MASK) == IO_MEM_RAM) {
tlb_entry->address = (tlb_entry->address & TARGET_PAGE_MASK) | IO_MEM_NOTDIRTY;
}
}
/* update the TLBs so that writes to code in the virtual page 'addr'
can be detected */
static void tlb_protect_code(CPUState *env, target_ulong addr)
static void tlb_protect_code(CPUState *env, ram_addr_t ram_addr,
target_ulong vaddr)
{
int i;
addr &= TARGET_PAGE_MASK;
i = (addr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
tlb_protect_code1(&env->tlb_write[0][i], addr);
tlb_protect_code1(&env->tlb_write[1][i], addr);
vaddr &= TARGET_PAGE_MASK;
i = (vaddr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
tlb_protect_code1(&env->tlb_write[0][i], vaddr);
tlb_protect_code1(&env->tlb_write[1][i], vaddr);
phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS] &= ~CODE_DIRTY_FLAG;
#ifdef USE_KQEMU
if (env->kqemu_enabled) {
kqemu_set_notdirty(env, ram_addr);
}
#endif
#if !defined(CONFIG_SOFTMMU)
/* NOTE: as we generated the code for this page, it is already at
least readable */
if (addr < MMAP_AREA_END)
mprotect((void *)addr, TARGET_PAGE_SIZE, PROT_READ);
if (vaddr < MMAP_AREA_END)
mprotect((void *)vaddr, TARGET_PAGE_SIZE, PROT_READ);
#endif
}
static inline void tlb_unprotect_code2(CPUTLBEntry *tlb_entry,
unsigned long phys_addr)
{
if ((tlb_entry->address & ~TARGET_PAGE_MASK) == IO_MEM_CODE &&
((tlb_entry->address & TARGET_PAGE_MASK) + tlb_entry->addend) == phys_addr) {
tlb_entry->address = (tlb_entry->address & TARGET_PAGE_MASK) | IO_MEM_NOTDIRTY;
}
}
/* update the TLB so that writes in physical page 'phys_addr' are no longer
tested self modifying code */
static void tlb_unprotect_code_phys(CPUState *env, unsigned long phys_addr, target_ulong vaddr)
tested for self modifying code */
static void tlb_unprotect_code_phys(CPUState *env, ram_addr_t ram_addr,
target_ulong vaddr)
{
int i;
phys_addr &= TARGET_PAGE_MASK;
phys_addr += (long)phys_ram_base;
i = (vaddr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
tlb_unprotect_code2(&env->tlb_write[0][i], phys_addr);
tlb_unprotect_code2(&env->tlb_write[1][i], phys_addr);
phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS] |= CODE_DIRTY_FLAG;
}
static inline void tlb_reset_dirty_range(CPUTLBEntry *tlb_entry,
@ -1531,7 +1527,7 @@ static inline void tlb_reset_dirty_range(CPUTLBEntry *tlb_entry,
}
}
void cpu_physical_memory_reset_dirty(target_ulong start, target_ulong end,
void cpu_physical_memory_reset_dirty(ram_addr_t start, ram_addr_t end,
int dirty_flags)
{
CPUState *env;
@ -1552,6 +1548,12 @@ void cpu_physical_memory_reset_dirty(target_ulong start, target_ulong end,
p[i] &= mask;
env = cpu_single_env;
#ifdef USE_KQEMU
if (env->kqemu_enabled) {
for(i = 0; i < len; i++)
kqemu_set_notdirty(env, (unsigned long)i << TARGET_PAGE_BITS);
}
#endif
/* we modify the TLB cache so that the dirty bit will be set again
when accessing the range */
start1 = start + (unsigned long)phys_ram_base;
@ -1589,6 +1591,29 @@ void cpu_physical_memory_reset_dirty(target_ulong start, target_ulong end,
#endif
}
static inline void tlb_update_dirty(CPUTLBEntry *tlb_entry)
{
ram_addr_t ram_addr;
if ((tlb_entry->address & ~TARGET_PAGE_MASK) == IO_MEM_RAM) {
ram_addr = (tlb_entry->address & TARGET_PAGE_MASK) +
tlb_entry->addend - (unsigned long)phys_ram_base;
if (!cpu_physical_memory_is_dirty(ram_addr)) {
tlb_entry->address |= IO_MEM_NOTDIRTY;
}
}
}
/* update the TLB according to the current state of the dirty bits */
void cpu_tlb_update_dirty(CPUState *env)
{
int i;
for(i = 0; i < CPU_TLB_SIZE; i++)
tlb_update_dirty(&env->tlb_write[0][i]);
for(i = 0; i < CPU_TLB_SIZE; i++)
tlb_update_dirty(&env->tlb_write[1][i]);
}
static inline void tlb_set_dirty1(CPUTLBEntry *tlb_entry,
unsigned long start)
{
@ -1626,28 +1651,20 @@ int tlb_set_page(CPUState *env, target_ulong vaddr,
{
PhysPageDesc *p;
unsigned long pd;
TranslationBlock *first_tb;
unsigned int index;
target_ulong address;
target_phys_addr_t addend;
int ret;
p = phys_page_find(paddr >> TARGET_PAGE_BITS);
first_tb = NULL;
if (!p) {
pd = IO_MEM_UNASSIGNED;
} else {
PageDesc *p1;
pd = p->phys_offset;
if ((pd & ~TARGET_PAGE_MASK) <= IO_MEM_ROM) {
/* NOTE: we also allocate the page at this stage */
p1 = page_find_alloc(pd >> TARGET_PAGE_BITS);
first_tb = p1->first_tb;
}
}
#if defined(DEBUG_TLB)
printf("tlb_set_page: vaddr=" TARGET_FMT_lx " paddr=0x%08x prot=%x u=%d c=%d smmu=%d pd=0x%08x\n",
vaddr, paddr, prot, is_user, (first_tb != NULL), is_softmmu, pd);
printf("tlb_set_page: vaddr=" TARGET_FMT_lx " paddr=0x%08x prot=%x u=%d smmu=%d pd=0x%08lx\n",
vaddr, paddr, prot, is_user, is_softmmu, pd);
#endif
ret = 0;
@ -1679,18 +1696,7 @@ int tlb_set_page(CPUState *env, target_ulong vaddr,
/* ROM: access is ignored (same as unassigned) */
env->tlb_write[is_user][index].address = vaddr | IO_MEM_ROM;
env->tlb_write[is_user][index].addend = addend;
} else
/* XXX: the PowerPC code seems not ready to handle
self modifying code with DCBI */
#if defined(TARGET_HAS_SMC) || 1
if (first_tb) {
/* if code is present, we use a specific memory
handler. It works only for physical memory access */
env->tlb_write[is_user][index].address = vaddr | IO_MEM_CODE;
env->tlb_write[is_user][index].addend = addend;
} else
#endif
if ((pd & ~TARGET_PAGE_MASK) == IO_MEM_RAM &&
} else if ((pd & ~TARGET_PAGE_MASK) == IO_MEM_RAM &&
!cpu_physical_memory_is_dirty(pd)) {
env->tlb_write[is_user][index].address = vaddr | IO_MEM_NOTDIRTY;
env->tlb_write[is_user][index].addend = addend;
@ -1986,75 +1992,66 @@ static CPUWriteMemoryFunc *unassigned_mem_write[3] = {
unassigned_mem_writeb,
};
/* self modifying code support in soft mmu mode : writing to a page
containing code comes to these functions */
static void code_mem_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
{
unsigned long phys_addr;
phys_addr = addr - (unsigned long)phys_ram_base;
#if !defined(CONFIG_USER_ONLY)
tb_invalidate_phys_page_fast(phys_addr, 1);
#endif
stb_p((uint8_t *)(long)addr, val);
phys_ram_dirty[phys_addr >> TARGET_PAGE_BITS] = 0xff;
}
static void code_mem_writew(void *opaque, target_phys_addr_t addr, uint32_t val)
{
unsigned long phys_addr;
phys_addr = addr - (unsigned long)phys_ram_base;
#if !defined(CONFIG_USER_ONLY)
tb_invalidate_phys_page_fast(phys_addr, 2);
#endif
stw_p((uint8_t *)(long)addr, val);
phys_ram_dirty[phys_addr >> TARGET_PAGE_BITS] = 0xff;
}
static void code_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
{
unsigned long phys_addr;
phys_addr = addr - (unsigned long)phys_ram_base;
#if !defined(CONFIG_USER_ONLY)
tb_invalidate_phys_page_fast(phys_addr, 4);
#endif
stl_p((uint8_t *)(long)addr, val);
phys_ram_dirty[phys_addr >> TARGET_PAGE_BITS] = 0xff;
}
static CPUReadMemoryFunc *code_mem_read[3] = {
NULL, /* never used */
NULL, /* never used */
NULL, /* never used */
};
static CPUWriteMemoryFunc *code_mem_write[3] = {
code_mem_writeb,
code_mem_writew,
code_mem_writel,
};
static void notdirty_mem_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
{
unsigned long ram_addr;
int dirty_flags;
ram_addr = addr - (unsigned long)phys_ram_base;
dirty_flags = phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS];
if (!(dirty_flags & CODE_DIRTY_FLAG)) {
#if !defined(CONFIG_USER_ONLY)
tb_invalidate_phys_page_fast(ram_addr, 1);
dirty_flags = phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS];
#endif
}
stb_p((uint8_t *)(long)addr, val);
tlb_set_dirty(addr, cpu_single_env->mem_write_vaddr);
/* we set the page as dirty only if the code has been flushed */
if (dirty_flags & CODE_DIRTY_FLAG)
tlb_set_dirty(addr, cpu_single_env->mem_write_vaddr);
}
static void notdirty_mem_writew(void *opaque, target_phys_addr_t addr, uint32_t val)
{
unsigned long ram_addr;
int dirty_flags;
ram_addr = addr - (unsigned long)phys_ram_base;
dirty_flags = phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS];
if (!(dirty_flags & CODE_DIRTY_FLAG)) {
#if !defined(CONFIG_USER_ONLY)
tb_invalidate_phys_page_fast(ram_addr, 2);
dirty_flags = phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS];
#endif
}
stw_p((uint8_t *)(long)addr, val);
tlb_set_dirty(addr, cpu_single_env->mem_write_vaddr);
/* we set the page as dirty only if the code has been flushed */
if (dirty_flags & CODE_DIRTY_FLAG)
tlb_set_dirty(addr, cpu_single_env->mem_write_vaddr);
}
static void notdirty_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
{
unsigned long ram_addr;
int dirty_flags;
ram_addr = addr - (unsigned long)phys_ram_base;
dirty_flags = phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS];
if (!(dirty_flags & CODE_DIRTY_FLAG)) {
#if !defined(CONFIG_USER_ONLY)
tb_invalidate_phys_page_fast(ram_addr, 4);
dirty_flags = phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS];
#endif
}
stl_p((uint8_t *)(long)addr, val);
tlb_set_dirty(addr, cpu_single_env->mem_write_vaddr);
/* we set the page as dirty only if the code has been flushed */
if (dirty_flags & CODE_DIRTY_FLAG)
tlb_set_dirty(addr, cpu_single_env->mem_write_vaddr);
}
static CPUReadMemoryFunc *error_mem_read[3] = {
NULL, /* never used */
NULL, /* never used */
NULL, /* never used */
};
static CPUWriteMemoryFunc *notdirty_mem_write[3] = {
notdirty_mem_writeb,
notdirty_mem_writew,
@ -2063,14 +2060,14 @@ static CPUWriteMemoryFunc *notdirty_mem_write[3] = {
static void io_mem_init(void)
{
cpu_register_io_memory(IO_MEM_ROM >> IO_MEM_SHIFT, code_mem_read, unassigned_mem_write, NULL);
cpu_register_io_memory(IO_MEM_ROM >> IO_MEM_SHIFT, error_mem_read, unassigned_mem_write, NULL);
cpu_register_io_memory(IO_MEM_UNASSIGNED >> IO_MEM_SHIFT, unassigned_mem_read, unassigned_mem_write, NULL);
cpu_register_io_memory(IO_MEM_CODE >> IO_MEM_SHIFT, code_mem_read, code_mem_write, NULL);
cpu_register_io_memory(IO_MEM_NOTDIRTY >> IO_MEM_SHIFT, code_mem_read, notdirty_mem_write, NULL);
cpu_register_io_memory(IO_MEM_NOTDIRTY >> IO_MEM_SHIFT, error_mem_read, notdirty_mem_write, NULL);
io_mem_nb = 5;
/* alloc dirty bits array */
phys_ram_dirty = qemu_vmalloc(phys_ram_size >> TARGET_PAGE_BITS);
memset(phys_ram_dirty, 0xff, phys_ram_size >> TARGET_PAGE_BITS);
}
/* mem_read and mem_write are arrays of functions containing the
@ -2182,7 +2179,7 @@ void cpu_physical_memory_rw(target_phys_addr_t addr, uint8_t *buf,
}
if (is_write) {
if ((pd & ~TARGET_PAGE_MASK) != 0) {
if ((pd & ~TARGET_PAGE_MASK) != IO_MEM_RAM) {
io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
if (l >= 4 && ((addr & 3) == 0)) {
/* 32 bit read access */
@ -2206,14 +2203,15 @@ void cpu_physical_memory_rw(target_phys_addr_t addr, uint8_t *buf,
/* RAM case */
ptr = phys_ram_base + addr1;
memcpy(ptr, buf, l);
/* invalidate code */
tb_invalidate_phys_page_range(addr1, addr1 + l, 0);
/* set dirty bit */
phys_ram_dirty[addr1 >> TARGET_PAGE_BITS] = 0xff;
if (!cpu_physical_memory_is_dirty(addr1)) {
/* invalidate code */
tb_invalidate_phys_page_range(addr1, addr1 + l, 0);
/* set dirty bit */
phys_ram_dirty[addr1 >> TARGET_PAGE_BITS] = 0xff;
}
}
} else {
if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM &&
(pd & ~TARGET_PAGE_MASK) != IO_MEM_CODE) {
if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM) {
/* I/O case */
io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
if (l >= 4 && ((addr & 3) == 0)) {
@ -2261,8 +2259,7 @@ uint32_t ldl_phys(target_phys_addr_t addr)
pd = p->phys_offset;
}
if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM &&
(pd & ~TARGET_PAGE_MASK) != IO_MEM_CODE) {
if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM) {
/* I/O case */
io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
val = io_mem_read[io_index][2](io_mem_opaque[io_index], addr);
@ -2292,7 +2289,7 @@ void stl_phys_notdirty(target_phys_addr_t addr, uint32_t val)
pd = p->phys_offset;
}
if ((pd & ~TARGET_PAGE_MASK) != 0) {
if ((pd & ~TARGET_PAGE_MASK) != IO_MEM_RAM) {
io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
io_mem_write[io_index][2](io_mem_opaque[io_index], addr, val);
} else {
@ -2303,7 +2300,6 @@ void stl_phys_notdirty(target_phys_addr_t addr, uint32_t val)
}
/* warning: addr must be aligned */
/* XXX: optimize code invalidation test */
void stl_phys(target_phys_addr_t addr, uint32_t val)
{
int io_index;
@ -2318,7 +2314,7 @@ void stl_phys(target_phys_addr_t addr, uint32_t val)
pd = p->phys_offset;
}
if ((pd & ~TARGET_PAGE_MASK) != 0) {
if ((pd & ~TARGET_PAGE_MASK) != IO_MEM_RAM) {
io_index = (pd >> IO_MEM_SHIFT) & (IO_MEM_NB_ENTRIES - 1);
io_mem_write[io_index][2](io_mem_opaque[io_index], addr, val);
} else {
@ -2327,10 +2323,12 @@ void stl_phys(target_phys_addr_t addr, uint32_t val)
/* RAM case */
ptr = phys_ram_base + addr1;
stl_p(ptr, val);
/* invalidate code */
tb_invalidate_phys_page_range(addr1, addr1 + 4, 0);
/* set dirty bit */
phys_ram_dirty[addr1 >> TARGET_PAGE_BITS] = 0xff;
if (!cpu_physical_memory_is_dirty(addr1)) {
/* invalidate code */
tb_invalidate_phys_page_range(addr1, addr1 + 4, 0);
/* set dirty bit */
phys_ram_dirty[addr1 >> TARGET_PAGE_BITS] = 0xff;
}
}
}