Revision 4a1418e0
b/MAINTAINERS | ||
---|---|---|
70 | 70 |
Dynamic translator Fabrice Bellard |
71 | 71 |
Main loop Fabrice Bellard (new maintainer needed) |
72 | 72 |
TCG Fabrice Bellard |
73 |
kqemu interface Fabrice Bellard |
|
74 | 73 |
IDE device ? |
75 | 74 |
SCSI device Paul Brook |
76 | 75 |
PCI layer ? |
b/Makefile.target | ||
---|---|---|
36 | 36 |
######################################################### |
37 | 37 |
# cpu emulator library |
38 | 38 |
libobj-y = exec.o translate-all.o cpu-exec.o translate.o |
39 |
libobj-$(CONFIG_KQEMU) += kqemu.o |
|
40 | 39 |
libobj-y += tcg/tcg.o tcg/tcg-runtime.o |
41 | 40 |
libobj-$(CONFIG_SOFTFLOAT) += fpu/softfloat.o |
42 | 41 |
libobj-$(CONFIG_NOSOFTFLOAT) += fpu/softfloat-native.o |
b/configure | ||
---|---|---|
185 | 185 |
bsd="no" |
186 | 186 |
linux="no" |
187 | 187 |
solaris="no" |
188 |
kqemu="no" |
|
189 | 188 |
profiler="no" |
190 | 189 |
cocoa="no" |
191 | 190 |
softmmu="yes" |
... | ... | |
238 | 237 |
GNU/kFreeBSD) |
239 | 238 |
audio_drv_list="oss" |
240 | 239 |
audio_possible_drivers="oss sdl esd pa" |
241 |
if [ "$cpu" = "i386" -o "$cpu" = "x86_64" ] ; then |
|
242 |
kqemu="yes" |
|
243 |
fi |
|
244 | 240 |
;; |
245 | 241 |
FreeBSD) |
246 | 242 |
bsd="yes" |
247 | 243 |
audio_drv_list="oss" |
248 | 244 |
audio_possible_drivers="oss sdl esd pa" |
249 |
if [ "$cpu" = "i386" -o "$cpu" = "x86_64" ] ; then |
|
250 |
kqemu="yes" |
|
251 |
fi |
|
252 | 245 |
;; |
253 | 246 |
DragonFly) |
254 | 247 |
bsd="yes" |
255 | 248 |
audio_drv_list="oss" |
256 | 249 |
audio_possible_drivers="oss sdl esd pa" |
257 |
if [ "$cpu" = "i386" -o "$cpu" = "x86_64" ] ; then |
|
258 |
kqemu="yes" |
|
259 |
fi |
|
260 | 250 |
aio="no" |
261 | 251 |
;; |
262 | 252 |
NetBSD) |
... | ... | |
320 | 310 |
exit 1 |
321 | 311 |
fi |
322 | 312 |
fi |
323 |
if test "$solarisrev" -ge 9 ; then |
|
324 |
kqemu="yes" |
|
325 |
fi |
|
326 | 313 |
fi |
327 | 314 |
if test -f /usr/include/sys/soundcard.h ; then |
328 | 315 |
audio_drv_list="oss" |
... | ... | |
343 | 330 |
usb="linux" |
344 | 331 |
kvm="yes" |
345 | 332 |
if [ "$cpu" = "i386" -o "$cpu" = "x86_64" ] ; then |
346 |
kqemu="yes" |
|
347 | 333 |
audio_possible_drivers="$audio_possible_drivers fmod" |
348 | 334 |
fi |
349 | 335 |
;; |
... | ... | |
358 | 344 |
fi |
359 | 345 |
|
360 | 346 |
if test "$mingw32" = "yes" ; then |
361 |
if [ "$cpu" = "i386" ] ; then |
|
362 |
kqemu="yes" |
|
363 |
fi |
|
364 | 347 |
EXESUF=".exe" |
365 | 348 |
QEMU_CFLAGS="-DWIN32_LEAN_AND_MEAN -DWINVER=0x501 $QEMU_CFLAGS" |
366 | 349 |
LIBS="-lwinmm -lws2_32 -liphlpapi $LIBS" |
... | ... | |
450 | 433 |
;; |
451 | 434 |
--disable-vde) vde="no" |
452 | 435 |
;; |
453 |
--disable-kqemu) kqemu="no" |
|
454 |
;; |
|
455 | 436 |
--disable-xen) xen="no" |
456 | 437 |
;; |
457 | 438 |
--disable-brlapi) brlapi="no" |
... | ... | |
597 | 578 |
echo " use %M for cpu name [$interp_prefix]" |
598 | 579 |
echo " --target-list=LIST set target list [$target_list]" |
599 | 580 |
echo "" |
600 |
echo "kqemu kernel acceleration support:" |
|
601 |
echo " --disable-kqemu disable kqemu support" |
|
602 |
echo "" |
|
603 | 581 |
echo "Advanced options (experts only):" |
604 | 582 |
echo " --source-path=PATH path of source code [$source_path]" |
605 | 583 |
echo " --cross-prefix=PREFIX use PREFIX for compile tools [$cross_prefix]" |
... | ... | |
1534 | 1512 |
if test -n "$sparc_cpu"; then |
1535 | 1513 |
echo "Target Sparc Arch $sparc_cpu" |
1536 | 1514 |
fi |
1537 |
echo "kqemu support $kqemu" |
|
1538 | 1515 |
echo "xen support $xen" |
1539 | 1516 |
echo "brlapi support $brlapi" |
1540 | 1517 |
echo "Documentation $build_docs" |
... | ... | |
2019 | 1996 |
if test "$xen" = "yes" -a "$target_softmmu" = "yes" ; then |
2020 | 1997 |
echo "CONFIG_XEN=y" >> $config_mak |
2021 | 1998 |
fi |
2022 |
if test $kqemu = "yes" -a "$target_softmmu" = "yes" |
|
2023 |
then |
|
2024 |
echo "CONFIG_KQEMU=y" >> $config_mak |
|
2025 |
fi |
|
2026 | 1999 |
esac |
2027 | 2000 |
case "$target_arch2" in |
2028 | 2001 |
i386|x86_64|ppcemb|ppc|ppc64) |
b/cpu-all.h | ||
---|---|---|
873 | 873 |
|
874 | 874 |
#define VGA_DIRTY_FLAG 0x01 |
875 | 875 |
#define CODE_DIRTY_FLAG 0x02 |
876 |
#define KQEMU_DIRTY_FLAG 0x04 |
|
877 | 876 |
#define MIGRATION_DIRTY_FLAG 0x08 |
878 | 877 |
|
879 | 878 |
/* read dirty bit (return 0 or 1) */ |
... | ... | |
1056 | 1055 |
return cpu_get_real_ticks(); |
1057 | 1056 |
} |
1058 | 1057 |
|
1059 |
extern int64_t kqemu_time, kqemu_time_start; |
|
1060 | 1058 |
extern int64_t qemu_time, qemu_time_start; |
1061 | 1059 |
extern int64_t tlb_flush_time; |
1062 |
extern int64_t kqemu_exec_count; |
|
1063 | 1060 |
extern int64_t dev_time; |
1064 |
extern int64_t kqemu_ret_int_count; |
|
1065 |
extern int64_t kqemu_ret_excp_count; |
|
1066 |
extern int64_t kqemu_ret_intr_count; |
|
1067 | 1061 |
#endif |
1068 | 1062 |
|
1069 | 1063 |
void cpu_inject_x86_mce(CPUState *cenv, int bank, uint64_t status, |
b/cpu-common.h | ||
---|---|---|
10 | 10 |
#include "bswap.h" |
11 | 11 |
|
12 | 12 |
/* address in the RAM (different from a physical address) */ |
13 |
#ifdef CONFIG_KQEMU |
|
14 |
/* FIXME: This is wrong. */ |
|
15 |
typedef uint32_t ram_addr_t; |
|
16 |
#else |
|
17 | 13 |
typedef unsigned long ram_addr_t; |
18 |
#endif |
|
19 | 14 |
|
20 | 15 |
/* memory API */ |
21 | 16 |
|
b/cpu-exec.c | ||
---|---|---|
321 | 321 |
} |
322 | 322 |
env->exception_index = -1; |
323 | 323 |
} |
324 |
#ifdef CONFIG_KQEMU |
|
325 |
if (kqemu_is_ok(env) && env->interrupt_request == 0 && env->exit_request == 0) { |
|
326 |
int ret; |
|
327 |
env->eflags = env->eflags | helper_cc_compute_all(CC_OP) | (DF & DF_MASK); |
|
328 |
ret = kqemu_cpu_exec(env); |
|
329 |
/* put eflags in CPU temporary format */ |
|
330 |
CC_SRC = env->eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C); |
|
331 |
DF = 1 - (2 * ((env->eflags >> 10) & 1)); |
|
332 |
CC_OP = CC_OP_EFLAGS; |
|
333 |
env->eflags &= ~(DF_MASK | CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C); |
|
334 |
if (ret == 1) { |
|
335 |
/* exception */ |
|
336 |
longjmp(env->jmp_env, 1); |
|
337 |
} else if (ret == 2) { |
|
338 |
/* softmmu execution needed */ |
|
339 |
} else { |
|
340 |
if (env->interrupt_request != 0 || env->exit_request != 0) { |
|
341 |
/* hardware interrupt will be executed just after */ |
|
342 |
} else { |
|
343 |
/* otherwise, we restart */ |
|
344 |
longjmp(env->jmp_env, 1); |
|
345 |
} |
|
346 |
} |
|
347 |
} |
|
348 |
#endif |
|
349 | 324 |
|
350 | 325 |
if (kvm_enabled()) { |
351 | 326 |
kvm_cpu_exec(env); |
... | ... | |
620 | 595 |
spans two pages, we cannot safely do a direct |
621 | 596 |
jump. */ |
622 | 597 |
{ |
623 |
if (next_tb != 0 && |
|
624 |
#ifdef CONFIG_KQEMU |
|
625 |
(env->kqemu_enabled != 2) && |
|
626 |
#endif |
|
627 |
tb->page_addr[1] == -1) { |
|
598 |
if (next_tb != 0 && tb->page_addr[1] == -1) { |
|
628 | 599 |
tb_add_jump((TranslationBlock *)(next_tb & ~3), next_tb & 3, tb); |
629 | 600 |
} |
630 | 601 |
} |
... | ... | |
678 | 649 |
} |
679 | 650 |
/* reset soft MMU for next block (it can currently |
680 | 651 |
only be set by a memory fault) */ |
681 |
#if defined(CONFIG_KQEMU) |
|
682 |
#define MIN_CYCLE_BEFORE_SWITCH (100 * 1000) |
|
683 |
if (kqemu_is_ok(env) && |
|
684 |
(cpu_get_time_fast() - env->last_io_time) >= MIN_CYCLE_BEFORE_SWITCH) { |
|
685 |
cpu_loop_exit(); |
|
686 |
} |
|
687 |
#endif |
|
688 | 652 |
} /* for(;;) */ |
689 | 653 |
} else { |
690 | 654 |
env_to_regs(); |
b/exec-all.h | ||
---|---|---|
348 | 348 |
} |
349 | 349 |
#endif |
350 | 350 |
|
351 |
#ifdef CONFIG_KQEMU |
|
352 |
#define KQEMU_MODIFY_PAGE_MASK (0xff & ~(VGA_DIRTY_FLAG | CODE_DIRTY_FLAG)) |
|
353 |
|
|
354 |
#define MSR_QPI_COMMBASE 0xfabe0010 |
|
355 |
|
|
356 |
int kqemu_init(CPUState *env); |
|
357 |
int kqemu_cpu_exec(CPUState *env); |
|
358 |
void kqemu_flush_page(CPUState *env, target_ulong addr); |
|
359 |
void kqemu_flush(CPUState *env, int global); |
|
360 |
void kqemu_set_notdirty(CPUState *env, ram_addr_t ram_addr); |
|
361 |
void kqemu_modify_page(CPUState *env, ram_addr_t ram_addr); |
|
362 |
void kqemu_set_phys_mem(uint64_t start_addr, ram_addr_t size, |
|
363 |
ram_addr_t phys_offset); |
|
364 |
void kqemu_cpu_interrupt(CPUState *env); |
|
365 |
void kqemu_record_dump(void); |
|
366 |
|
|
367 |
extern uint32_t kqemu_comm_base; |
|
368 |
|
|
369 |
extern ram_addr_t kqemu_phys_ram_size; |
|
370 |
extern uint8_t *kqemu_phys_ram_base; |
|
371 |
|
|
372 |
static inline int kqemu_is_ok(CPUState *env) |
|
373 |
{ |
|
374 |
return(env->kqemu_enabled && |
|
375 |
(env->cr[0] & CR0_PE_MASK) && |
|
376 |
!(env->hflags & HF_INHIBIT_IRQ_MASK) && |
|
377 |
(env->eflags & IF_MASK) && |
|
378 |
!(env->eflags & VM_MASK) && |
|
379 |
(env->kqemu_enabled == 2 || |
|
380 |
((env->hflags & HF_CPL_MASK) == 3 && |
|
381 |
(env->eflags & IOPL_MASK) != IOPL_MASK))); |
|
382 |
} |
|
383 |
|
|
384 |
#endif |
|
385 |
|
|
386 | 351 |
typedef void (CPUDebugExcpHandler)(CPUState *env); |
387 | 352 |
|
388 | 353 |
CPUDebugExcpHandler *cpu_set_debug_excp_handler(CPUDebugExcpHandler *handler); |
b/exec.c | ||
---|---|---|
70 | 70 |
#define TARGET_VIRT_ADDR_SPACE_BITS 42 |
71 | 71 |
#elif defined(TARGET_PPC64) |
72 | 72 |
#define TARGET_PHYS_ADDR_SPACE_BITS 42 |
73 |
#elif defined(TARGET_X86_64) && !defined(CONFIG_KQEMU)
|
|
73 |
#elif defined(TARGET_X86_64) |
|
74 | 74 |
#define TARGET_PHYS_ADDR_SPACE_BITS 42 |
75 |
#elif defined(TARGET_I386) && !defined(CONFIG_KQEMU)
|
|
75 |
#elif defined(TARGET_I386) |
|
76 | 76 |
#define TARGET_PHYS_ADDR_SPACE_BITS 36 |
77 | 77 |
#else |
78 |
/* Note: for compatibility with kqemu, we use 32 bits for x86_64 */ |
|
79 | 78 |
#define TARGET_PHYS_ADDR_SPACE_BITS 32 |
80 | 79 |
#endif |
81 | 80 |
|
... | ... | |
1763 | 1762 |
|
1764 | 1763 |
memset (env->tb_jmp_cache, 0, TB_JMP_CACHE_SIZE * sizeof (void *)); |
1765 | 1764 |
|
1766 |
#ifdef CONFIG_KQEMU |
|
1767 |
if (env->kqemu_enabled) { |
|
1768 |
kqemu_flush(env, flush_global); |
|
1769 |
} |
|
1770 |
#endif |
|
1771 | 1765 |
tlb_flush_count++; |
1772 | 1766 |
} |
1773 | 1767 |
|
... | ... | |
1801 | 1795 |
tlb_flush_entry(&env->tlb_table[mmu_idx][i], addr); |
1802 | 1796 |
|
1803 | 1797 |
tlb_flush_jmp_cache(env, addr); |
1804 |
|
|
1805 |
#ifdef CONFIG_KQEMU |
|
1806 |
if (env->kqemu_enabled) { |
|
1807 |
kqemu_flush_page(env, addr); |
|
1808 |
} |
|
1809 |
#endif |
|
1810 | 1798 |
} |
1811 | 1799 |
|
1812 | 1800 |
/* update the TLBs so that writes to code in the virtual page 'addr' |
... | ... | |
1854 | 1842 |
if (length == 0) |
1855 | 1843 |
return; |
1856 | 1844 |
len = length >> TARGET_PAGE_BITS; |
1857 |
#ifdef CONFIG_KQEMU |
|
1858 |
/* XXX: should not depend on cpu context */ |
|
1859 |
env = first_cpu; |
|
1860 |
if (env->kqemu_enabled) { |
|
1861 |
ram_addr_t addr; |
|
1862 |
addr = start; |
|
1863 |
for(i = 0; i < len; i++) { |
|
1864 |
kqemu_set_notdirty(env, addr); |
|
1865 |
addr += TARGET_PAGE_SIZE; |
|
1866 |
} |
|
1867 |
} |
|
1868 |
#endif |
|
1869 | 1845 |
mask = ~dirty_flags; |
1870 | 1846 |
p = phys_ram_dirty + (start >> TARGET_PAGE_BITS); |
1871 | 1847 |
for(i = 0; i < len; i++) |
... | ... | |
2322 | 2298 |
ram_addr_t orig_size = size; |
2323 | 2299 |
void *subpage; |
2324 | 2300 |
|
2325 |
#ifdef CONFIG_KQEMU |
|
2326 |
/* XXX: should not depend on cpu context */ |
|
2327 |
env = first_cpu; |
|
2328 |
if (env->kqemu_enabled) { |
|
2329 |
kqemu_set_phys_mem(start_addr, size, phys_offset); |
|
2330 |
} |
|
2331 |
#endif |
|
2332 | 2301 |
if (kvm_enabled()) |
2333 | 2302 |
kvm_set_phys_mem(start_addr, size, phys_offset); |
2334 | 2303 |
|
... | ... | |
2423 | 2392 |
kvm_uncoalesce_mmio_region(addr, size); |
2424 | 2393 |
} |
2425 | 2394 |
|
2426 |
#ifdef CONFIG_KQEMU |
|
2427 |
/* XXX: better than nothing */ |
|
2428 |
static ram_addr_t kqemu_ram_alloc(ram_addr_t size) |
|
2429 |
{ |
|
2430 |
ram_addr_t addr; |
|
2431 |
if ((last_ram_offset + size) > kqemu_phys_ram_size) { |
|
2432 |
fprintf(stderr, "Not enough memory (requested_size = %" PRIu64 ", max memory = %" PRIu64 ")\n", |
|
2433 |
(uint64_t)size, (uint64_t)kqemu_phys_ram_size); |
|
2434 |
abort(); |
|
2435 |
} |
|
2436 |
addr = last_ram_offset; |
|
2437 |
last_ram_offset = TARGET_PAGE_ALIGN(last_ram_offset + size); |
|
2438 |
return addr; |
|
2439 |
} |
|
2440 |
#endif |
|
2441 |
|
|
2442 | 2395 |
ram_addr_t qemu_ram_alloc(ram_addr_t size) |
2443 | 2396 |
{ |
2444 | 2397 |
RAMBlock *new_block; |
2445 | 2398 |
|
2446 |
#ifdef CONFIG_KQEMU |
|
2447 |
if (kqemu_phys_ram_base) { |
|
2448 |
return kqemu_ram_alloc(size); |
|
2449 |
} |
|
2450 |
#endif |
|
2451 |
|
|
2452 | 2399 |
size = TARGET_PAGE_ALIGN(size); |
2453 | 2400 |
new_block = qemu_malloc(sizeof(*new_block)); |
2454 | 2401 |
|
... | ... | |
2491 | 2438 |
RAMBlock **prevp; |
2492 | 2439 |
RAMBlock *block; |
2493 | 2440 |
|
2494 |
#ifdef CONFIG_KQEMU |
|
2495 |
if (kqemu_phys_ram_base) { |
|
2496 |
return kqemu_phys_ram_base + addr; |
|
2497 |
} |
|
2498 |
#endif |
|
2499 |
|
|
2500 | 2441 |
prev = NULL; |
2501 | 2442 |
prevp = &ram_blocks; |
2502 | 2443 |
block = ram_blocks; |
... | ... | |
2529 | 2470 |
RAMBlock *block; |
2530 | 2471 |
uint8_t *host = ptr; |
2531 | 2472 |
|
2532 |
#ifdef CONFIG_KQEMU |
|
2533 |
if (kqemu_phys_ram_base) { |
|
2534 |
return host - kqemu_phys_ram_base; |
|
2535 |
} |
|
2536 |
#endif |
|
2537 |
|
|
2538 | 2473 |
prev = NULL; |
2539 | 2474 |
prevp = &ram_blocks; |
2540 | 2475 |
block = ram_blocks; |
... | ... | |
2639 | 2574 |
#endif |
2640 | 2575 |
} |
2641 | 2576 |
stb_p(qemu_get_ram_ptr(ram_addr), val); |
2642 |
#ifdef CONFIG_KQEMU |
|
2643 |
if (cpu_single_env->kqemu_enabled && |
|
2644 |
(dirty_flags & KQEMU_MODIFY_PAGE_MASK) != KQEMU_MODIFY_PAGE_MASK) |
|
2645 |
kqemu_modify_page(cpu_single_env, ram_addr); |
|
2646 |
#endif |
|
2647 | 2577 |
dirty_flags |= (0xff & ~CODE_DIRTY_FLAG); |
2648 | 2578 |
phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS] = dirty_flags; |
2649 | 2579 |
/* we remove the notdirty callback only if the code has been |
... | ... | |
2664 | 2594 |
#endif |
2665 | 2595 |
} |
2666 | 2596 |
stw_p(qemu_get_ram_ptr(ram_addr), val); |
2667 |
#ifdef CONFIG_KQEMU |
|
2668 |
if (cpu_single_env->kqemu_enabled && |
|
2669 |
(dirty_flags & KQEMU_MODIFY_PAGE_MASK) != KQEMU_MODIFY_PAGE_MASK) |
|
2670 |
kqemu_modify_page(cpu_single_env, ram_addr); |
|
2671 |
#endif |
|
2672 | 2597 |
dirty_flags |= (0xff & ~CODE_DIRTY_FLAG); |
2673 | 2598 |
phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS] = dirty_flags; |
2674 | 2599 |
/* we remove the notdirty callback only if the code has been |
... | ... | |
2689 | 2614 |
#endif |
2690 | 2615 |
} |
2691 | 2616 |
stl_p(qemu_get_ram_ptr(ram_addr), val); |
2692 |
#ifdef CONFIG_KQEMU |
|
2693 |
if (cpu_single_env->kqemu_enabled && |
|
2694 |
(dirty_flags & KQEMU_MODIFY_PAGE_MASK) != KQEMU_MODIFY_PAGE_MASK) |
|
2695 |
kqemu_modify_page(cpu_single_env, ram_addr); |
|
2696 |
#endif |
|
2697 | 2617 |
dirty_flags |= (0xff & ~CODE_DIRTY_FLAG); |
2698 | 2618 |
phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS] = dirty_flags; |
2699 | 2619 |
/* we remove the notdirty callback only if the code has been |
... | ... | |
3044 | 2964 |
|
3045 | 2965 |
io_mem_watch = cpu_register_io_memory(watch_mem_read, |
3046 | 2966 |
watch_mem_write, NULL); |
3047 |
#ifdef CONFIG_KQEMU |
|
3048 |
if (kqemu_phys_ram_base) { |
|
3049 |
/* alloc dirty bits array */ |
|
3050 |
phys_ram_dirty = qemu_vmalloc(kqemu_phys_ram_size >> TARGET_PAGE_BITS); |
|
3051 |
memset(phys_ram_dirty, 0xff, kqemu_phys_ram_size >> TARGET_PAGE_BITS); |
|
3052 |
} |
|
3053 |
#endif |
|
3054 | 2967 |
} |
3055 | 2968 |
|
3056 | 2969 |
#endif /* !defined(CONFIG_USER_ONLY) */ |
b/hw/pc.c | ||
---|---|---|
122 | 122 |
/* TSC handling */ |
123 | 123 |
uint64_t cpu_get_tsc(CPUX86State *env) |
124 | 124 |
{ |
125 |
/* Note: when using kqemu, it is more logical to return the host TSC |
|
126 |
because kqemu does not trap the RDTSC instruction for |
|
127 |
performance reasons */ |
|
128 |
#ifdef CONFIG_KQEMU |
|
129 |
if (env->kqemu_enabled) { |
|
130 |
return cpu_get_real_ticks(); |
|
131 |
} else |
|
132 |
#endif |
|
133 |
{ |
|
134 |
return cpu_get_ticks(); |
|
135 |
} |
|
125 |
return cpu_get_ticks(); |
|
136 | 126 |
} |
137 | 127 |
|
138 | 128 |
/* SMM support */ |
b/ioport.c | ||
---|---|---|
196 | 196 |
{ |
197 | 197 |
LOG_IOPORT("outb: %04"FMT_pioaddr" %02"PRIx8"\n", addr, val); |
198 | 198 |
ioport_write(0, addr, val); |
199 |
#ifdef CONFIG_KQEMU |
|
200 |
if (env) |
|
201 |
env->last_io_time = cpu_get_time_fast(); |
|
202 |
#endif |
|
203 | 199 |
} |
204 | 200 |
|
205 | 201 |
void cpu_outw(CPUState *env, pio_addr_t addr, uint16_t val) |
206 | 202 |
{ |
207 | 203 |
LOG_IOPORT("outw: %04"FMT_pioaddr" %04"PRIx16"\n", addr, val); |
208 | 204 |
ioport_write(1, addr, val); |
209 |
#ifdef CONFIG_KQEMU |
|
210 |
if (env) |
|
211 |
env->last_io_time = cpu_get_time_fast(); |
|
212 |
#endif |
|
213 | 205 |
} |
214 | 206 |
|
215 | 207 |
void cpu_outl(CPUState *env, pio_addr_t addr, uint32_t val) |
216 | 208 |
{ |
217 | 209 |
LOG_IOPORT("outl: %04"FMT_pioaddr" %08"PRIx32"\n", addr, val); |
218 | 210 |
ioport_write(2, addr, val); |
219 |
#ifdef CONFIG_KQEMU |
|
220 |
if (env) |
|
221 |
env->last_io_time = cpu_get_time_fast(); |
|
222 |
#endif |
|
223 | 211 |
} |
224 | 212 |
|
225 | 213 |
uint8_t cpu_inb(CPUState *env, pio_addr_t addr) |
... | ... | |
227 | 215 |
uint8_t val; |
228 | 216 |
val = ioport_read(0, addr); |
229 | 217 |
LOG_IOPORT("inb : %04"FMT_pioaddr" %02"PRIx8"\n", addr, val); |
230 |
#ifdef CONFIG_KQEMU |
|
231 |
if (env) |
|
232 |
env->last_io_time = cpu_get_time_fast(); |
|
233 |
#endif |
|
234 | 218 |
return val; |
235 | 219 |
} |
236 | 220 |
|
... | ... | |
239 | 223 |
uint16_t val; |
240 | 224 |
val = ioport_read(1, addr); |
241 | 225 |
LOG_IOPORT("inw : %04"FMT_pioaddr" %04"PRIx16"\n", addr, val); |
242 |
#ifdef CONFIG_KQEMU |
|
243 |
if (env) |
|
244 |
env->last_io_time = cpu_get_time_fast(); |
|
245 |
#endif |
|
246 | 226 |
return val; |
247 | 227 |
} |
248 | 228 |
|
... | ... | |
251 | 231 |
uint32_t val; |
252 | 232 |
val = ioport_read(2, addr); |
253 | 233 |
LOG_IOPORT("inl : %04"FMT_pioaddr" %08"PRIx32"\n", addr, val); |
254 |
#ifdef CONFIG_KQEMU |
|
255 |
if (env) |
|
256 |
env->last_io_time = cpu_get_time_fast(); |
|
257 |
#endif |
|
258 | 234 |
return val; |
259 | 235 |
} |
/dev/null | ||
---|---|---|
1 |
/* |
|
2 |
* KQEMU support |
|
3 |
* |
|
4 |
* Copyright (c) 2005-2008 Fabrice Bellard |
|
5 |
* |
|
6 |
* This library is free software; you can redistribute it and/or |
|
7 |
* modify it under the terms of the GNU Lesser General Public |
|
8 |
* License as published by the Free Software Foundation; either |
|
9 |
* version 2 of the License, or (at your option) any later version. |
|
10 |
* |
|
11 |
* This library is distributed in the hope that it will be useful, |
|
12 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
|
13 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
|
14 |
* Lesser General Public License for more details. |
|
15 |
* |
|
16 |
* You should have received a copy of the GNU Lesser General Public |
|
17 |
* License along with this library; if not, see <http://www.gnu.org/licenses/>. |
|
18 |
*/ |
|
19 |
#include "config.h" |
|
20 |
#ifdef _WIN32 |
|
21 |
#include <windows.h> |
|
22 |
#include <winioctl.h> |
|
23 |
#else |
|
24 |
#include <sys/types.h> |
|
25 |
#include <sys/mman.h> |
|
26 |
#include <sys/ioctl.h> |
|
27 |
#endif |
|
28 |
#ifdef CONFIG_SOLARIS |
|
29 |
#include <sys/ioccom.h> |
|
30 |
#endif |
|
31 |
#include <stdlib.h> |
|
32 |
#include <stdio.h> |
|
33 |
#include <stdarg.h> |
|
34 |
#include <string.h> |
|
35 |
#include <errno.h> |
|
36 |
#include <unistd.h> |
|
37 |
#include <inttypes.h> |
|
38 |
|
|
39 |
#include "cpu.h" |
|
40 |
#include "exec-all.h" |
|
41 |
#include "qemu-common.h" |
|
42 |
|
|
43 |
#ifdef CONFIG_KQEMU |
|
44 |
|
|
45 |
#define DEBUG |
|
46 |
//#define PROFILE |
|
47 |
|
|
48 |
|
|
49 |
#ifdef DEBUG |
|
50 |
# define LOG_INT(...) qemu_log_mask(CPU_LOG_INT, ## __VA_ARGS__) |
|
51 |
# define LOG_INT_STATE(env) log_cpu_state_mask(CPU_LOG_INT, (env), 0) |
|
52 |
#else |
|
53 |
# define LOG_INT(...) do { } while (0) |
|
54 |
# define LOG_INT_STATE(env) do { } while (0) |
|
55 |
#endif |
|
56 |
|
|
57 |
#include <unistd.h> |
|
58 |
#include <fcntl.h> |
|
59 |
#include "kqemu.h" |
|
60 |
|
|
61 |
#ifdef _WIN32 |
|
62 |
#define KQEMU_DEVICE "\\\\.\\kqemu" |
|
63 |
#else |
|
64 |
#define KQEMU_DEVICE "/dev/kqemu" |
|
65 |
#endif |
|
66 |
|
|
67 |
static void qpi_init(void); |
|
68 |
|
|
69 |
#ifdef _WIN32 |
|
70 |
#define KQEMU_INVALID_FD INVALID_HANDLE_VALUE |
|
71 |
HANDLE kqemu_fd = KQEMU_INVALID_FD; |
|
72 |
#define kqemu_closefd(x) CloseHandle(x) |
|
73 |
#else |
|
74 |
#define KQEMU_INVALID_FD -1 |
|
75 |
int kqemu_fd = KQEMU_INVALID_FD; |
|
76 |
#define kqemu_closefd(x) close(x) |
|
77 |
#endif |
|
78 |
|
|
79 |
/* 0 = not allowed |
|
80 |
1 = user kqemu |
|
81 |
2 = kernel kqemu |
|
82 |
*/ |
|
83 |
int kqemu_allowed = 0; |
|
84 |
uint64_t *pages_to_flush; |
|
85 |
unsigned int nb_pages_to_flush; |
|
86 |
uint64_t *ram_pages_to_update; |
|
87 |
unsigned int nb_ram_pages_to_update; |
|
88 |
uint64_t *modified_ram_pages; |
|
89 |
unsigned int nb_modified_ram_pages; |
|
90 |
uint8_t *modified_ram_pages_table; |
|
91 |
int qpi_io_memory; |
|
92 |
uint32_t kqemu_comm_base; /* physical address of the QPI communication page */ |
|
93 |
ram_addr_t kqemu_phys_ram_size; |
|
94 |
uint8_t *kqemu_phys_ram_base; |
|
95 |
|
|
96 |
#define cpuid(index, eax, ebx, ecx, edx) \ |
|
97 |
asm volatile ("cpuid" \ |
|
98 |
: "=a" (eax), "=b" (ebx), "=c" (ecx), "=d" (edx) \ |
|
99 |
: "0" (index)) |
|
100 |
|
|
101 |
#ifdef __x86_64__ |
|
102 |
static int is_cpuid_supported(void) |
|
103 |
{ |
|
104 |
return 1; |
|
105 |
} |
|
106 |
#else |
|
107 |
static int is_cpuid_supported(void) |
|
108 |
{ |
|
109 |
int v0, v1; |
|
110 |
asm volatile ("pushf\n" |
|
111 |
"popl %0\n" |
|
112 |
"movl %0, %1\n" |
|
113 |
"xorl $0x00200000, %0\n" |
|
114 |
"pushl %0\n" |
|
115 |
"popf\n" |
|
116 |
"pushf\n" |
|
117 |
"popl %0\n" |
|
118 |
: "=a" (v0), "=d" (v1) |
|
119 |
: |
|
120 |
: "cc"); |
|
121 |
return (v0 != v1); |
|
122 |
} |
|
123 |
#endif |
|
124 |
|
|
125 |
static void kqemu_update_cpuid(CPUState *env) |
|
126 |
{ |
|
127 |
int critical_features_mask, features, ext_features, ext_features_mask; |
|
128 |
uint32_t eax, ebx, ecx, edx; |
|
129 |
|
|
130 |
/* the following features are kept identical on the host and |
|
131 |
target cpus because they are important for user code. Strictly |
|
132 |
speaking, only SSE really matters because the OS must support |
|
133 |
it if the user code uses it. */ |
|
134 |
critical_features_mask = |
|
135 |
CPUID_CMOV | CPUID_CX8 | |
|
136 |
CPUID_FXSR | CPUID_MMX | CPUID_SSE | |
|
137 |
CPUID_SSE2 | CPUID_SEP; |
|
138 |
ext_features_mask = CPUID_EXT_SSE3 | CPUID_EXT_MONITOR; |
|
139 |
if (!is_cpuid_supported()) { |
|
140 |
features = 0; |
|
141 |
ext_features = 0; |
|
142 |
} else { |
|
143 |
cpuid(1, eax, ebx, ecx, edx); |
|
144 |
features = edx; |
|
145 |
ext_features = ecx; |
|
146 |
} |
|
147 |
#ifdef __x86_64__ |
|
148 |
/* NOTE: on x86_64 CPUs, SYSENTER is not supported in |
|
149 |
compatibility mode, so in order to have the best performances |
|
150 |
it is better not to use it */ |
|
151 |
features &= ~CPUID_SEP; |
|
152 |
#endif |
|
153 |
env->cpuid_features = (env->cpuid_features & ~critical_features_mask) | |
|
154 |
(features & critical_features_mask); |
|
155 |
env->cpuid_ext_features = (env->cpuid_ext_features & ~ext_features_mask) | |
|
156 |
(ext_features & ext_features_mask); |
|
157 |
/* XXX: we could update more of the target CPUID state so that the |
|
158 |
non accelerated code sees exactly the same CPU features as the |
|
159 |
accelerated code */ |
|
160 |
} |
|
161 |
|
|
162 |
int kqemu_init(CPUState *env) |
|
163 |
{ |
|
164 |
struct kqemu_init kinit; |
|
165 |
int ret, version; |
|
166 |
#ifdef _WIN32 |
|
167 |
DWORD temp; |
|
168 |
#endif |
|
169 |
|
|
170 |
if (!kqemu_allowed) |
|
171 |
return -1; |
|
172 |
|
|
173 |
#ifdef _WIN32 |
|
174 |
kqemu_fd = CreateFile(KQEMU_DEVICE, GENERIC_WRITE | GENERIC_READ, |
|
175 |
FILE_SHARE_READ | FILE_SHARE_WRITE, |
|
176 |
NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, |
|
177 |
NULL); |
|
178 |
if (kqemu_fd == KQEMU_INVALID_FD) { |
|
179 |
fprintf(stderr, "Could not open '%s' - QEMU acceleration layer not activated: %lu\n", |
|
180 |
KQEMU_DEVICE, GetLastError()); |
|
181 |
return -1; |
|
182 |
} |
|
183 |
#else |
|
184 |
kqemu_fd = open(KQEMU_DEVICE, O_RDWR); |
|
185 |
if (kqemu_fd == KQEMU_INVALID_FD) { |
|
186 |
fprintf(stderr, "Could not open '%s' - QEMU acceleration layer not activated: %s\n", |
|
187 |
KQEMU_DEVICE, strerror(errno)); |
|
188 |
return -1; |
|
189 |
} |
|
190 |
#endif |
|
191 |
version = 0; |
|
192 |
#ifdef _WIN32 |
|
193 |
DeviceIoControl(kqemu_fd, KQEMU_GET_VERSION, NULL, 0, |
|
194 |
&version, sizeof(version), &temp, NULL); |
|
195 |
#else |
|
196 |
ioctl(kqemu_fd, KQEMU_GET_VERSION, &version); |
|
197 |
#endif |
|
198 |
if (version != KQEMU_VERSION) { |
|
199 |
fprintf(stderr, "Version mismatch between kqemu module and qemu (%08x %08x) - disabling kqemu use\n", |
|
200 |
version, KQEMU_VERSION); |
|
201 |
goto fail; |
|
202 |
} |
|
203 |
|
|
204 |
pages_to_flush = qemu_vmalloc(KQEMU_MAX_PAGES_TO_FLUSH * |
|
205 |
sizeof(uint64_t)); |
|
206 |
if (!pages_to_flush) |
|
207 |
goto fail; |
|
208 |
|
|
209 |
ram_pages_to_update = qemu_vmalloc(KQEMU_MAX_RAM_PAGES_TO_UPDATE * |
|
210 |
sizeof(uint64_t)); |
|
211 |
if (!ram_pages_to_update) |
|
212 |
goto fail; |
|
213 |
|
|
214 |
modified_ram_pages = qemu_vmalloc(KQEMU_MAX_MODIFIED_RAM_PAGES * |
|
215 |
sizeof(uint64_t)); |
|
216 |
if (!modified_ram_pages) |
|
217 |
goto fail; |
|
218 |
modified_ram_pages_table = |
|
219 |
qemu_mallocz(kqemu_phys_ram_size >> TARGET_PAGE_BITS); |
|
220 |
if (!modified_ram_pages_table) |
|
221 |
goto fail; |
|
222 |
|
|
223 |
memset(&kinit, 0, sizeof(kinit)); /* set the paddings to zero */ |
|
224 |
kinit.ram_base = kqemu_phys_ram_base; |
|
225 |
kinit.ram_size = kqemu_phys_ram_size; |
|
226 |
kinit.ram_dirty = phys_ram_dirty; |
|
227 |
kinit.pages_to_flush = pages_to_flush; |
|
228 |
kinit.ram_pages_to_update = ram_pages_to_update; |
|
229 |
kinit.modified_ram_pages = modified_ram_pages; |
|
230 |
#ifdef _WIN32 |
|
231 |
ret = DeviceIoControl(kqemu_fd, KQEMU_INIT, &kinit, sizeof(kinit), |
|
232 |
NULL, 0, &temp, NULL) == TRUE ? 0 : -1; |
|
233 |
#else |
|
234 |
ret = ioctl(kqemu_fd, KQEMU_INIT, &kinit); |
|
235 |
#endif |
|
236 |
if (ret < 0) { |
|
237 |
fprintf(stderr, "Error %d while initializing QEMU acceleration layer - disabling it for now\n", ret); |
|
238 |
fail: |
|
239 |
kqemu_closefd(kqemu_fd); |
|
240 |
kqemu_fd = KQEMU_INVALID_FD; |
|
241 |
return -1; |
|
242 |
} |
|
243 |
kqemu_update_cpuid(env); |
|
244 |
env->kqemu_enabled = kqemu_allowed; |
|
245 |
nb_pages_to_flush = 0; |
|
246 |
nb_ram_pages_to_update = 0; |
|
247 |
|
|
248 |
qpi_init(); |
|
249 |
return 0; |
|
250 |
} |
|
251 |
|
|
252 |
void kqemu_flush_page(CPUState *env, target_ulong addr) |
|
253 |
{ |
|
254 |
LOG_INT("kqemu_flush_page: addr=" TARGET_FMT_lx "\n", addr); |
|
255 |
if (nb_pages_to_flush >= KQEMU_MAX_PAGES_TO_FLUSH) |
|
256 |
nb_pages_to_flush = KQEMU_FLUSH_ALL; |
|
257 |
else |
|
258 |
pages_to_flush[nb_pages_to_flush++] = addr; |
|
259 |
} |
|
260 |
|
|
261 |
void kqemu_flush(CPUState *env, int global) |
|
262 |
{ |
|
263 |
LOG_INT("kqemu_flush:\n"); |
|
264 |
nb_pages_to_flush = KQEMU_FLUSH_ALL; |
|
265 |
} |
|
266 |
|
|
267 |
void kqemu_set_notdirty(CPUState *env, ram_addr_t ram_addr) |
|
268 |
{ |
|
269 |
LOG_INT("kqemu_set_notdirty: addr=%08lx\n", |
|
270 |
(unsigned long)ram_addr); |
|
271 |
/* we only track transitions to dirty state */ |
|
272 |
if (phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS] != 0xff) |
|
273 |
return; |
|
274 |
if (nb_ram_pages_to_update >= KQEMU_MAX_RAM_PAGES_TO_UPDATE) |
|
275 |
nb_ram_pages_to_update = KQEMU_RAM_PAGES_UPDATE_ALL; |
|
276 |
else |
|
277 |
ram_pages_to_update[nb_ram_pages_to_update++] = ram_addr; |
|
278 |
} |
|
279 |
|
|
280 |
static void kqemu_reset_modified_ram_pages(void) |
|
281 |
{ |
|
282 |
int i; |
|
283 |
unsigned long page_index; |
|
284 |
|
|
285 |
for(i = 0; i < nb_modified_ram_pages; i++) { |
|
286 |
page_index = modified_ram_pages[i] >> TARGET_PAGE_BITS; |
|
287 |
modified_ram_pages_table[page_index] = 0; |
|
288 |
} |
|
289 |
nb_modified_ram_pages = 0; |
|
290 |
} |
|
291 |
|
|
292 |
void kqemu_modify_page(CPUState *env, ram_addr_t ram_addr) |
|
293 |
{ |
|
294 |
unsigned long page_index; |
|
295 |
int ret; |
|
296 |
#ifdef _WIN32 |
|
297 |
DWORD temp; |
|
298 |
#endif |
|
299 |
|
|
300 |
page_index = ram_addr >> TARGET_PAGE_BITS; |
|
301 |
if (!modified_ram_pages_table[page_index]) { |
|
302 |
#if 0 |
|
303 |
printf("%d: modify_page=%08lx\n", nb_modified_ram_pages, ram_addr); |
|
304 |
#endif |
|
305 |
modified_ram_pages_table[page_index] = 1; |
|
306 |
modified_ram_pages[nb_modified_ram_pages++] = ram_addr; |
|
307 |
if (nb_modified_ram_pages >= KQEMU_MAX_MODIFIED_RAM_PAGES) { |
|
308 |
/* flush */ |
|
309 |
#ifdef _WIN32 |
|
310 |
ret = DeviceIoControl(kqemu_fd, KQEMU_MODIFY_RAM_PAGES, |
|
311 |
&nb_modified_ram_pages, |
|
312 |
sizeof(nb_modified_ram_pages), |
|
313 |
NULL, 0, &temp, NULL); |
|
314 |
#else |
|
315 |
ret = ioctl(kqemu_fd, KQEMU_MODIFY_RAM_PAGES, |
|
316 |
&nb_modified_ram_pages); |
|
317 |
#endif |
|
318 |
kqemu_reset_modified_ram_pages(); |
|
319 |
} |
|
320 |
} |
|
321 |
} |
|
322 |
|
|
323 |
void kqemu_set_phys_mem(uint64_t start_addr, ram_addr_t size, |
|
324 |
ram_addr_t phys_offset) |
|
325 |
{ |
|
326 |
struct kqemu_phys_mem kphys_mem1, *kphys_mem = &kphys_mem1; |
|
327 |
uint64_t end; |
|
328 |
int ret, io_index; |
|
329 |
|
|
330 |
end = (start_addr + size + TARGET_PAGE_SIZE - 1) & TARGET_PAGE_MASK; |
|
331 |
start_addr &= TARGET_PAGE_MASK; |
|
332 |
kphys_mem->phys_addr = start_addr; |
|
333 |
kphys_mem->size = end - start_addr; |
|
334 |
kphys_mem->ram_addr = phys_offset & TARGET_PAGE_MASK; |
|
335 |
io_index = phys_offset & ~TARGET_PAGE_MASK; |
|
336 |
switch(io_index) { |
|
337 |
case IO_MEM_RAM: |
|
338 |
kphys_mem->io_index = KQEMU_IO_MEM_RAM; |
|
339 |
break; |
|
340 |
case IO_MEM_ROM: |
|
341 |
kphys_mem->io_index = KQEMU_IO_MEM_ROM; |
|
342 |
break; |
|
343 |
default: |
|
344 |
if (qpi_io_memory == io_index) { |
|
345 |
kphys_mem->io_index = KQEMU_IO_MEM_COMM; |
|
346 |
} else { |
|
347 |
kphys_mem->io_index = KQEMU_IO_MEM_UNASSIGNED; |
|
348 |
} |
|
349 |
break; |
|
350 |
} |
|
351 |
#ifdef _WIN32 |
|
352 |
{ |
|
353 |
DWORD temp; |
|
354 |
ret = DeviceIoControl(kqemu_fd, KQEMU_SET_PHYS_MEM, |
|
355 |
kphys_mem, sizeof(*kphys_mem), |
|
356 |
NULL, 0, &temp, NULL) == TRUE ? 0 : -1; |
|
357 |
} |
|
358 |
#else |
|
359 |
ret = ioctl(kqemu_fd, KQEMU_SET_PHYS_MEM, kphys_mem); |
|
360 |
#endif |
|
361 |
if (ret < 0) { |
|
362 |
fprintf(stderr, "kqemu: KQEMU_SET_PHYS_PAGE error=%d: start_addr=0x%016" PRIx64 " size=0x%08lx phys_offset=0x%08lx\n", |
|
363 |
ret, start_addr, |
|
364 |
(unsigned long)size, (unsigned long)phys_offset); |
|
365 |
} |
|
366 |
} |
|
367 |
|
|
368 |
struct fpstate { |
|
369 |
uint16_t fpuc; |
|
370 |
uint16_t dummy1; |
|
371 |
uint16_t fpus; |
|
372 |
uint16_t dummy2; |
|
373 |
uint16_t fptag; |
|
374 |
uint16_t dummy3; |
|
375 |
|
|
376 |
uint32_t fpip; |
|
377 |
uint32_t fpcs; |
|
378 |
uint32_t fpoo; |
|
379 |
uint32_t fpos; |
|
380 |
uint8_t fpregs1[8 * 10]; |
|
381 |
}; |
|
382 |
|
|
383 |
struct fpxstate { |
|
384 |
uint16_t fpuc; |
|
385 |
uint16_t fpus; |
|
386 |
uint16_t fptag; |
|
387 |
uint16_t fop; |
|
388 |
uint32_t fpuip; |
|
389 |
uint16_t cs_sel; |
|
390 |
uint16_t dummy0; |
|
391 |
uint32_t fpudp; |
|
392 |
uint16_t ds_sel; |
|
393 |
uint16_t dummy1; |
|
394 |
uint32_t mxcsr; |
|
395 |
uint32_t mxcsr_mask; |
|
396 |
uint8_t fpregs1[8 * 16]; |
|
397 |
uint8_t xmm_regs[16 * 16]; |
|
398 |
uint8_t dummy2[96]; |
|
399 |
}; |
|
400 |
|
|
401 |
static struct fpxstate fpx1 __attribute__((aligned(16))); |
|
402 |
|
|
403 |
static void restore_native_fp_frstor(CPUState *env) |
|
404 |
{ |
|
405 |
int fptag, i, j; |
|
406 |
struct fpstate fp1, *fp = &fp1; |
|
407 |
|
|
408 |
fp->fpuc = env->fpuc; |
|
409 |
fp->fpus = (env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11; |
|
410 |
fptag = 0; |
|
411 |
for (i=7; i>=0; i--) { |
|
412 |
fptag <<= 2; |
|
413 |
if (env->fptags[i]) { |
|
414 |
fptag |= 3; |
|
415 |
} else { |
|
416 |
/* the FPU automatically computes it */ |
|
417 |
} |
|
418 |
} |
|
419 |
fp->fptag = fptag; |
|
420 |
j = env->fpstt; |
|
421 |
for(i = 0;i < 8; i++) { |
|
422 |
memcpy(&fp->fpregs1[i * 10], &env->fpregs[j].d, 10); |
|
423 |
j = (j + 1) & 7; |
|
424 |
} |
|
425 |
asm volatile ("frstor %0" : "=m" (*fp)); |
|
426 |
} |
|
427 |
|
|
428 |
static void save_native_fp_fsave(CPUState *env) |
|
429 |
{ |
|
430 |
int fptag, i, j; |
|
431 |
uint16_t fpuc; |
|
432 |
struct fpstate fp1, *fp = &fp1; |
|
433 |
|
|
434 |
asm volatile ("fsave %0" : : "m" (*fp)); |
|
435 |
env->fpuc = fp->fpuc; |
|
436 |
env->fpstt = (fp->fpus >> 11) & 7; |
|
437 |
env->fpus = fp->fpus & ~0x3800; |
|
438 |
fptag = fp->fptag; |
|
439 |
for(i = 0;i < 8; i++) { |
|
440 |
env->fptags[i] = ((fptag & 3) == 3); |
|
441 |
fptag >>= 2; |
|
442 |
} |
|
443 |
j = env->fpstt; |
|
444 |
for(i = 0;i < 8; i++) { |
|
445 |
memcpy(&env->fpregs[j].d, &fp->fpregs1[i * 10], 10); |
|
446 |
j = (j + 1) & 7; |
|
447 |
} |
|
448 |
/* we must restore the default rounding state */ |
|
449 |
fpuc = 0x037f | (env->fpuc & (3 << 10)); |
|
450 |
asm volatile("fldcw %0" : : "m" (fpuc)); |
|
451 |
} |
|
452 |
|
|
453 |
static void restore_native_fp_fxrstor(CPUState *env) |
|
454 |
{ |
|
455 |
struct fpxstate *fp = &fpx1; |
|
456 |
int i, j, fptag; |
|
457 |
|
|
458 |
fp->fpuc = env->fpuc; |
|
459 |
fp->fpus = (env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11; |
|
460 |
fptag = 0; |
|
461 |
for(i = 0; i < 8; i++) |
|
462 |
fptag |= (env->fptags[i] << i); |
|
463 |
fp->fptag = fptag ^ 0xff; |
|
464 |
|
|
465 |
j = env->fpstt; |
|
466 |
for(i = 0;i < 8; i++) { |
|
467 |
memcpy(&fp->fpregs1[i * 16], &env->fpregs[j].d, 10); |
|
468 |
j = (j + 1) & 7; |
|
469 |
} |
|
470 |
if (env->cpuid_features & CPUID_SSE) { |
|
471 |
fp->mxcsr = env->mxcsr; |
|
472 |
/* XXX: check if DAZ is not available */ |
|
473 |
fp->mxcsr_mask = 0xffff; |
|
474 |
memcpy(fp->xmm_regs, env->xmm_regs, CPU_NB_REGS * 16); |
|
475 |
} |
|
476 |
asm volatile ("fxrstor %0" : "=m" (*fp)); |
|
477 |
} |
|
478 |
|
|
479 |
static void save_native_fp_fxsave(CPUState *env) |
|
480 |
{ |
|
481 |
struct fpxstate *fp = &fpx1; |
|
482 |
int fptag, i, j; |
|
483 |
uint16_t fpuc; |
|
484 |
|
|
485 |
asm volatile ("fxsave %0" : : "m" (*fp)); |
|
486 |
env->fpuc = fp->fpuc; |
|
487 |
env->fpstt = (fp->fpus >> 11) & 7; |
|
488 |
env->fpus = fp->fpus & ~0x3800; |
|
489 |
fptag = fp->fptag ^ 0xff; |
|
490 |
for(i = 0;i < 8; i++) { |
|
491 |
env->fptags[i] = (fptag >> i) & 1; |
|
492 |
} |
|
493 |
j = env->fpstt; |
|
494 |
for(i = 0;i < 8; i++) { |
|
495 |
memcpy(&env->fpregs[j].d, &fp->fpregs1[i * 16], 10); |
|
496 |
j = (j + 1) & 7; |
|
497 |
} |
|
498 |
if (env->cpuid_features & CPUID_SSE) { |
|
499 |
env->mxcsr = fp->mxcsr; |
|
500 |
memcpy(env->xmm_regs, fp->xmm_regs, CPU_NB_REGS * 16); |
|
501 |
} |
|
502 |
|
|
503 |
/* we must restore the default rounding state */ |
|
504 |
asm volatile ("fninit"); |
|
505 |
fpuc = 0x037f | (env->fpuc & (3 << 10)); |
|
506 |
asm volatile("fldcw %0" : : "m" (fpuc)); |
|
507 |
} |
|
508 |
|
|
509 |
static int do_syscall(CPUState *env, |
|
510 |
struct kqemu_cpu_state *kenv) |
|
511 |
{ |
|
512 |
int selector; |
|
513 |
|
|
514 |
selector = (env->star >> 32) & 0xffff; |
|
515 |
#ifdef TARGET_X86_64 |
|
516 |
if (env->hflags & HF_LMA_MASK) { |
|
517 |
int code64; |
|
518 |
|
|
519 |
env->regs[R_ECX] = kenv->next_eip; |
|
520 |
env->regs[11] = env->eflags; |
|
521 |
|
|
522 |
code64 = env->hflags & HF_CS64_MASK; |
|
523 |
|
|
524 |
cpu_x86_set_cpl(env, 0); |
|
525 |
cpu_x86_load_seg_cache(env, R_CS, selector & 0xfffc, |
|
526 |
0, 0xffffffff, |
|
527 |
DESC_G_MASK | DESC_P_MASK | |
|
528 |
DESC_S_MASK | |
|
529 |
DESC_CS_MASK | DESC_R_MASK | DESC_A_MASK | DESC_L_MASK); |
|
530 |
cpu_x86_load_seg_cache(env, R_SS, (selector + 8) & 0xfffc, |
|
531 |
0, 0xffffffff, |
|
532 |
DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | |
|
533 |
DESC_S_MASK | |
|
534 |
DESC_W_MASK | DESC_A_MASK); |
|
535 |
env->eflags &= ~env->fmask; |
|
536 |
if (code64) |
|
537 |
env->eip = env->lstar; |
|
538 |
else |
|
539 |
env->eip = env->cstar; |
|
540 |
} else |
|
541 |
#endif |
|
542 |
{ |
|
543 |
env->regs[R_ECX] = (uint32_t)kenv->next_eip; |
|
544 |
|
|
545 |
cpu_x86_set_cpl(env, 0); |
|
546 |
cpu_x86_load_seg_cache(env, R_CS, selector & 0xfffc, |
|
547 |
0, 0xffffffff, |
|
548 |
DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | |
|
549 |
DESC_S_MASK | |
|
550 |
DESC_CS_MASK | DESC_R_MASK | DESC_A_MASK); |
|
551 |
cpu_x86_load_seg_cache(env, R_SS, (selector + 8) & 0xfffc, |
|
552 |
0, 0xffffffff, |
|
553 |
DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | |
|
554 |
DESC_S_MASK | |
|
555 |
DESC_W_MASK | DESC_A_MASK); |
|
556 |
env->eflags &= ~(IF_MASK | RF_MASK | VM_MASK); |
|
557 |
env->eip = (uint32_t)env->star; |
|
558 |
} |
|
559 |
return 2; |
|
560 |
} |
|
561 |
|
|
562 |
#ifdef CONFIG_PROFILER |
|
563 |
|
|
564 |
#define PC_REC_SIZE 1 |
|
565 |
#define PC_REC_HASH_BITS 16 |
|
566 |
#define PC_REC_HASH_SIZE (1 << PC_REC_HASH_BITS) |
|
567 |
|
|
568 |
typedef struct PCRecord { |
|
569 |
unsigned long pc; |
|
570 |
int64_t count; |
|
571 |
struct PCRecord *next; |
|
572 |
} PCRecord; |
|
573 |
|
|
574 |
static PCRecord *pc_rec_hash[PC_REC_HASH_SIZE]; |
|
575 |
static int nb_pc_records; |
|
576 |
|
|
577 |
static void kqemu_record_pc(unsigned long pc) |
|
578 |
{ |
|
579 |
unsigned long h; |
|
580 |
PCRecord **pr, *r; |
|
581 |
|
|
582 |
h = pc / PC_REC_SIZE; |
|
583 |
h = h ^ (h >> PC_REC_HASH_BITS); |
|
584 |
h &= (PC_REC_HASH_SIZE - 1); |
|
585 |
pr = &pc_rec_hash[h]; |
|
586 |
for(;;) { |
|
587 |
r = *pr; |
|
588 |
if (r == NULL) |
|
589 |
break; |
|
590 |
if (r->pc == pc) { |
|
591 |
r->count++; |
|
592 |
return; |
|
593 |
} |
|
594 |
pr = &r->next; |
|
595 |
} |
|
596 |
r = malloc(sizeof(PCRecord)); |
|
597 |
r->count = 1; |
|
598 |
r->pc = pc; |
|
599 |
r->next = NULL; |
|
600 |
*pr = r; |
|
601 |
nb_pc_records++; |
|
602 |
} |
|
603 |
|
|
604 |
static int pc_rec_cmp(const void *p1, const void *p2) |
|
605 |
{ |
|
606 |
PCRecord *r1 = *(PCRecord **)p1; |
|
607 |
PCRecord *r2 = *(PCRecord **)p2; |
|
608 |
if (r1->count < r2->count) |
|
609 |
return 1; |
|
610 |
else if (r1->count == r2->count) |
|
611 |
return 0; |
|
612 |
else |
|
613 |
return -1; |
|
614 |
} |
|
615 |
|
|
616 |
static void kqemu_record_flush(void) |
|
617 |
{ |
|
618 |
PCRecord *r, *r_next; |
|
619 |
int h; |
|
620 |
|
|
621 |
for(h = 0; h < PC_REC_HASH_SIZE; h++) { |
|
622 |
for(r = pc_rec_hash[h]; r != NULL; r = r_next) { |
|
623 |
r_next = r->next; |
|
624 |
free(r); |
|
625 |
} |
|
626 |
pc_rec_hash[h] = NULL; |
|
627 |
} |
|
628 |
nb_pc_records = 0; |
|
629 |
} |
|
630 |
|
|
631 |
void kqemu_record_dump(void) |
|
632 |
{ |
|
633 |
PCRecord **pr, *r; |
|
634 |
int i, h; |
|
635 |
FILE *f; |
|
636 |
int64_t total, sum; |
|
637 |
|
|
638 |
pr = malloc(sizeof(PCRecord *) * nb_pc_records); |
|
639 |
i = 0; |
|
640 |
total = 0; |
|
641 |
for(h = 0; h < PC_REC_HASH_SIZE; h++) { |
|
642 |
for(r = pc_rec_hash[h]; r != NULL; r = r->next) { |
|
643 |
pr[i++] = r; |
|
644 |
total += r->count; |
|
645 |
} |
|
646 |
} |
|
647 |
qsort(pr, nb_pc_records, sizeof(PCRecord *), pc_rec_cmp); |
|
648 |
|
|
649 |
f = fopen("/tmp/kqemu.stats", "w"); |
|
650 |
if (!f) { |
|
651 |
perror("/tmp/kqemu.stats"); |
|
652 |
exit(1); |
|
653 |
} |
|
654 |
fprintf(f, "total: %" PRId64 "\n", total); |
|
655 |
sum = 0; |
|
656 |
for(i = 0; i < nb_pc_records; i++) { |
|
657 |
r = pr[i]; |
|
658 |
sum += r->count; |
|
659 |
fprintf(f, "%08lx: %" PRId64 " %0.2f%% %0.2f%%\n", |
|
660 |
r->pc, |
|
661 |
r->count, |
|
662 |
(double)r->count / (double)total * 100.0, |
|
663 |
(double)sum / (double)total * 100.0); |
|
664 |
} |
|
665 |
fclose(f); |
|
666 |
free(pr); |
|
667 |
|
|
668 |
kqemu_record_flush(); |
|
669 |
} |
|
670 |
#endif |
|
671 |
|
|
672 |
static inline void kqemu_load_seg(struct kqemu_segment_cache *ksc, |
|
673 |
const SegmentCache *sc) |
|
674 |
{ |
|
675 |
ksc->selector = sc->selector; |
|
676 |
ksc->flags = sc->flags; |
|
677 |
ksc->limit = sc->limit; |
|
678 |
ksc->base = sc->base; |
|
679 |
} |
|
680 |
|
|
681 |
static inline void kqemu_save_seg(SegmentCache *sc, |
|
682 |
const struct kqemu_segment_cache *ksc) |
|
683 |
{ |
|
684 |
sc->selector = ksc->selector; |
|
685 |
sc->flags = ksc->flags; |
|
686 |
sc->limit = ksc->limit; |
|
687 |
sc->base = ksc->base; |
|
688 |
} |
|
689 |
|
|
690 |
int kqemu_cpu_exec(CPUState *env) |
|
691 |
{ |
|
692 |
struct kqemu_cpu_state kcpu_state, *kenv = &kcpu_state; |
|
693 |
int ret, cpl, i; |
|
694 |
#ifdef CONFIG_PROFILER |
|
695 |
int64_t ti; |
|
696 |
#endif |
|
697 |
#ifdef _WIN32 |
|
698 |
DWORD temp; |
|
699 |
#endif |
|
700 |
|
|
701 |
#ifdef CONFIG_PROFILER |
|
702 |
ti = profile_getclock(); |
|
703 |
#endif |
|
704 |
LOG_INT("kqemu: cpu_exec: enter\n"); |
|
705 |
LOG_INT_STATE(env); |
|
706 |
for(i = 0; i < CPU_NB_REGS; i++) |
|
707 |
kenv->regs[i] = env->regs[i]; |
|
708 |
kenv->eip = env->eip; |
|
709 |
kenv->eflags = env->eflags; |
|
710 |
for(i = 0; i < 6; i++) |
|
711 |
kqemu_load_seg(&kenv->segs[i], &env->segs[i]); |
|
712 |
kqemu_load_seg(&kenv->ldt, &env->ldt); |
|
713 |
kqemu_load_seg(&kenv->tr, &env->tr); |
|
714 |
kqemu_load_seg(&kenv->gdt, &env->gdt); |
|
715 |
kqemu_load_seg(&kenv->idt, &env->idt); |
|
716 |
kenv->cr0 = env->cr[0]; |
|
717 |
kenv->cr2 = env->cr[2]; |
|
718 |
kenv->cr3 = env->cr[3]; |
|
719 |
kenv->cr4 = env->cr[4]; |
|
720 |
kenv->a20_mask = env->a20_mask; |
|
721 |
kenv->efer = env->efer; |
|
722 |
kenv->tsc_offset = 0; |
|
723 |
kenv->star = env->star; |
|
724 |
kenv->sysenter_cs = env->sysenter_cs; |
|
725 |
kenv->sysenter_esp = env->sysenter_esp; |
|
726 |
kenv->sysenter_eip = env->sysenter_eip; |
|
727 |
#ifdef TARGET_X86_64 |
|
728 |
kenv->lstar = env->lstar; |
|
729 |
kenv->cstar = env->cstar; |
|
730 |
kenv->fmask = env->fmask; |
|
731 |
kenv->kernelgsbase = env->kernelgsbase; |
|
732 |
#endif |
|
733 |
if (env->dr[7] & 0xff) { |
|
734 |
kenv->dr7 = env->dr[7]; |
|
735 |
kenv->dr0 = env->dr[0]; |
|
736 |
kenv->dr1 = env->dr[1]; |
|
737 |
kenv->dr2 = env->dr[2]; |
|
738 |
kenv->dr3 = env->dr[3]; |
|
739 |
} else { |
|
740 |
kenv->dr7 = 0; |
|
741 |
} |
|
742 |
kenv->dr6 = env->dr[6]; |
|
743 |
cpl = (env->hflags & HF_CPL_MASK); |
|
744 |
kenv->cpl = cpl; |
|
745 |
kenv->nb_pages_to_flush = nb_pages_to_flush; |
|
746 |
kenv->user_only = (env->kqemu_enabled == 1); |
|
747 |
kenv->nb_ram_pages_to_update = nb_ram_pages_to_update; |
|
748 |
nb_ram_pages_to_update = 0; |
|
749 |
kenv->nb_modified_ram_pages = nb_modified_ram_pages; |
|
750 |
|
|
751 |
kqemu_reset_modified_ram_pages(); |
|
752 |
|
|
753 |
if (env->cpuid_features & CPUID_FXSR) |
|
754 |
restore_native_fp_fxrstor(env); |
|
755 |
else |
|
756 |
restore_native_fp_frstor(env); |
|
757 |
|
|
758 |
#ifdef _WIN32 |
|
759 |
if (DeviceIoControl(kqemu_fd, KQEMU_EXEC, |
|
760 |
kenv, sizeof(struct kqemu_cpu_state), |
|
761 |
kenv, sizeof(struct kqemu_cpu_state), |
|
762 |
&temp, NULL)) { |
|
763 |
ret = kenv->retval; |
|
764 |
} else { |
|
765 |
ret = -1; |
|
766 |
} |
|
767 |
#else |
|
768 |
ioctl(kqemu_fd, KQEMU_EXEC, kenv); |
|
769 |
ret = kenv->retval; |
|
770 |
#endif |
|
771 |
if (env->cpuid_features & CPUID_FXSR) |
|
772 |
save_native_fp_fxsave(env); |
|
773 |
else |
|
774 |
save_native_fp_fsave(env); |
|
775 |
|
|
776 |
for(i = 0; i < CPU_NB_REGS; i++) |
|
777 |
env->regs[i] = kenv->regs[i]; |
|
778 |
env->eip = kenv->eip; |
|
779 |
env->eflags = kenv->eflags; |
|
780 |
for(i = 0; i < 6; i++) |
|
781 |
kqemu_save_seg(&env->segs[i], &kenv->segs[i]); |
|
782 |
cpu_x86_set_cpl(env, kenv->cpl); |
|
783 |
kqemu_save_seg(&env->ldt, &kenv->ldt); |
|
784 |
env->cr[0] = kenv->cr0; |
|
785 |
env->cr[4] = kenv->cr4; |
|
786 |
env->cr[3] = kenv->cr3; |
|
787 |
env->cr[2] = kenv->cr2; |
|
788 |
env->dr[6] = kenv->dr6; |
|
789 |
#ifdef TARGET_X86_64 |
|
790 |
env->kernelgsbase = kenv->kernelgsbase; |
|
791 |
#endif |
|
792 |
|
|
793 |
/* flush pages as indicated by kqemu */ |
|
794 |
if (kenv->nb_pages_to_flush >= KQEMU_FLUSH_ALL) { |
|
795 |
tlb_flush(env, 1); |
|
796 |
} else { |
|
797 |
for(i = 0; i < kenv->nb_pages_to_flush; i++) { |
|
798 |
tlb_flush_page(env, pages_to_flush[i]); |
|
799 |
} |
|
800 |
} |
|
801 |
nb_pages_to_flush = 0; |
|
802 |
|
|
803 |
#ifdef CONFIG_PROFILER |
|
804 |
kqemu_time += profile_getclock() - ti; |
|
805 |
kqemu_exec_count++; |
|
806 |
#endif |
|
807 |
|
|
808 |
if (kenv->nb_ram_pages_to_update > 0) { |
|
809 |
cpu_tlb_update_dirty(env); |
|
810 |
} |
|
811 |
|
|
812 |
if (kenv->nb_modified_ram_pages > 0) { |
|
813 |
for(i = 0; i < kenv->nb_modified_ram_pages; i++) { |
|
814 |
unsigned long addr; |
|
815 |
addr = modified_ram_pages[i]; |
|
816 |
tb_invalidate_phys_page_range(addr, addr + TARGET_PAGE_SIZE, 0); |
|
817 |
} |
|
818 |
} |
|
819 |
|
|
820 |
/* restore the hidden flags */ |
|
821 |
{ |
|
822 |
unsigned int new_hflags; |
|
823 |
#ifdef TARGET_X86_64 |
|
824 |
if ((env->hflags & HF_LMA_MASK) && |
|
825 |
(env->segs[R_CS].flags & DESC_L_MASK)) { |
|
826 |
/* long mode */ |
|
827 |
new_hflags = HF_CS32_MASK | HF_SS32_MASK | HF_CS64_MASK; |
|
828 |
} else |
|
829 |
#endif |
|
830 |
{ |
|
831 |
/* legacy / compatibility case */ |
|
832 |
new_hflags = (env->segs[R_CS].flags & DESC_B_MASK) |
|
833 |
>> (DESC_B_SHIFT - HF_CS32_SHIFT); |
|
834 |
new_hflags |= (env->segs[R_SS].flags & DESC_B_MASK) |
|
835 |
>> (DESC_B_SHIFT - HF_SS32_SHIFT); |
|
836 |
if (!(env->cr[0] & CR0_PE_MASK) || |
|
837 |
(env->eflags & VM_MASK) || |
|
838 |
!(env->hflags & HF_CS32_MASK)) { |
|
839 |
/* XXX: try to avoid this test. The problem comes from the |
|
840 |
fact that is real mode or vm86 mode we only modify the |
|
841 |
'base' and 'selector' fields of the segment cache to go |
|
842 |
faster. A solution may be to force addseg to one in |
|
843 |
translate-i386.c. */ |
|
844 |
new_hflags |= HF_ADDSEG_MASK; |
|
845 |
} else { |
|
846 |
new_hflags |= ((env->segs[R_DS].base | |
|
847 |
env->segs[R_ES].base | |
|
848 |
env->segs[R_SS].base) != 0) << |
|
849 |
HF_ADDSEG_SHIFT; |
|
850 |
} |
|
851 |
} |
|
852 |
env->hflags = (env->hflags & |
|
853 |
~(HF_CS32_MASK | HF_SS32_MASK | HF_CS64_MASK | HF_ADDSEG_MASK)) | |
|
854 |
new_hflags; |
|
855 |
} |
|
856 |
/* update FPU flags */ |
|
857 |
env->hflags = (env->hflags & ~(HF_MP_MASK | HF_EM_MASK | HF_TS_MASK)) | |
|
858 |
((env->cr[0] << (HF_MP_SHIFT - 1)) & (HF_MP_MASK | HF_EM_MASK | HF_TS_MASK)); |
|
859 |
if (env->cr[4] & CR4_OSFXSR_MASK) |
|
860 |
env->hflags |= HF_OSFXSR_MASK; |
|
861 |
else |
|
862 |
env->hflags &= ~HF_OSFXSR_MASK; |
|
863 |
|
|
864 |
LOG_INT("kqemu: kqemu_cpu_exec: ret=0x%x\n", ret); |
|
865 |
if (ret == KQEMU_RET_SYSCALL) { |
|
866 |
/* syscall instruction */ |
|
867 |
return do_syscall(env, kenv); |
|
868 |
} else |
|
869 |
if ((ret & 0xff00) == KQEMU_RET_INT) { |
|
870 |
env->exception_index = ret & 0xff; |
|
871 |
env->error_code = 0; |
|
872 |
env->exception_is_int = 1; |
|
873 |
env->exception_next_eip = kenv->next_eip; |
|
874 |
#ifdef CONFIG_PROFILER |
|
875 |
kqemu_ret_int_count++; |
|
876 |
#endif |
|
877 |
LOG_INT("kqemu: interrupt v=%02x:\n", env->exception_index); |
|
878 |
LOG_INT_STATE(env); |
|
879 |
return 1; |
|
880 |
} else if ((ret & 0xff00) == KQEMU_RET_EXCEPTION) { |
|
881 |
env->exception_index = ret & 0xff; |
|
882 |
env->error_code = kenv->error_code; |
|
883 |
env->exception_is_int = 0; |
|
884 |
env->exception_next_eip = 0; |
|
885 |
#ifdef CONFIG_PROFILER |
|
886 |
kqemu_ret_excp_count++; |
|
887 |
#endif |
|
888 |
LOG_INT("kqemu: exception v=%02x e=%04x:\n", |
|
889 |
env->exception_index, env->error_code); |
|
890 |
LOG_INT_STATE(env); |
|
891 |
return 1; |
|
892 |
} else if (ret == KQEMU_RET_INTR) { |
|
893 |
#ifdef CONFIG_PROFILER |
|
894 |
kqemu_ret_intr_count++; |
|
895 |
#endif |
|
896 |
LOG_INT_STATE(env); |
|
897 |
return 0; |
|
898 |
} else if (ret == KQEMU_RET_SOFTMMU) { |
|
899 |
#ifdef CONFIG_PROFILER |
|
900 |
{ |
|
901 |
unsigned long pc = env->eip + env->segs[R_CS].base; |
|
902 |
kqemu_record_pc(pc); |
|
903 |
} |
|
904 |
#endif |
|
905 |
LOG_INT_STATE(env); |
|
906 |
return 2; |
|
907 |
} else { |
|
908 |
cpu_dump_state(env, stderr, fprintf, 0); |
|
909 |
fprintf(stderr, "Unsupported return value: 0x%x\n", ret); |
|
910 |
exit(1); |
|
911 |
} |
|
912 |
return 0; |
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