[qemu.git] / darwin-user / commpage.c

 /*
 *  Commpage syscalls
 *
 *  Copyright (c) 2006 Pierre d'Herbemont
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, see <http://www.gnu.org/licenses/>.
 */
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>

#include <mach/message.h>
#include <mach/mach.h>
#include <mach/mach_time.h>
#include <sys/time.h>
#include <sys/mman.h>
#include <libkern/OSAtomic.h>

#include "qemu.h"

//#define DEBUG_COMMPAGE

#ifdef DEBUG_COMMPAGE
# define DPRINTF(...) do { qemu_log(__VA_ARGS__); printf(__VA_ARGS__); } while(0)
#else
# define DPRINTF(...) do { qemu_log(__VA_ARGS__); } while(0)
#endif

/********************************************************************
 *   Commpage definitions
 */
#ifdef TARGET_I386
/* Reserve space for the commpage see xnu/osfmk/i386/cpu_capabilities.h */
# define COMMPAGE_START (-16 * 4096) /* base address is -20 * 4096 */
# define COMMPAGE_SIZE  (0x1240) /* _COMM_PAGE_AREA_LENGTH is 19 * 4096 */
#elif defined(TARGET_PPC)
/* Reserve space for the commpage see xnu/osfmk/ppc/cpu_capabilities.h */
# define COMMPAGE_START (-8*4096)
# define COMMPAGE_SIZE  (2*4096) /* its _COMM_PAGE_AREA_USED but _COMM_PAGE_AREA_LENGTH is 7*4096 */
#endif

void do_compare_and_swap32(void *cpu_env, int num);
void do_compare_and_swap64(void *cpu_env, int num);
void do_add_atomic_word32(void *cpu_env, int num);
void do_cgettimeofday(void *cpu_env, int num, uint32_t arg1);
void do_nanotime(void *cpu_env, int num);

void unimpl_commpage(void *cpu_env, int num);

typedef void (*commpage_8args_function_t)(uint32_t arg1, uint32_t arg2, uint32_t arg3,
                uint32_t arg4, uint32_t arg5, uint32_t arg6, uint32_t arg7,
                uint32_t arg8);
typedef void (*commpage_indirect_function_t)(void *cpu_env, int num, uint32_t arg1,
                uint32_t arg2, uint32_t arg3,  uint32_t arg4, uint32_t arg5,
                uint32_t arg6, uint32_t arg7, uint32_t arg8);

#define HAS_PTR  0x10
#define NO_PTR   0x20
#define CALL_DIRECT   0x1
#define CALL_INDIRECT 0x2

#define COMMPAGE_ENTRY(name, nargs, offset, func, options) \
    { #name, offset, nargs, options, (commpage_8args_function_t)func }

struct commpage_entry {
    char * name;
    int offset;
    int nargs;
    char options;
    commpage_8args_function_t function;
};

static inline int commpage_code_num(struct commpage_entry *entry)
{
    if((entry->options & HAS_PTR))
        return entry->offset + 4;
    else
        return entry->offset;
}

static inline int commpage_is_indirect(struct commpage_entry *entry)
{
    return !(entry->options & CALL_DIRECT);
}

/********************************************************************
 *   Commpage entry
 */
static struct commpage_entry commpage_entries[] =
{
    COMMPAGE_ENTRY(compare_and_swap32,    0, 0x080,  do_compare_and_swap32, CALL_INDIRECT | HAS_PTR),
    COMMPAGE_ENTRY(compare_and_swap64,    0, 0x0c0,  do_compare_and_swap64, CALL_INDIRECT | HAS_PTR),
    COMMPAGE_ENTRY(enqueue,               0, 0x100,  unimpl_commpage,       CALL_INDIRECT),
    COMMPAGE_ENTRY(dequeue,               0, 0x140,  unimpl_commpage,       CALL_INDIRECT),
    COMMPAGE_ENTRY(memory_barrier,        0, 0x180,  unimpl_commpage,       CALL_INDIRECT),
    COMMPAGE_ENTRY(add_atomic_word32,     0, 0x1a0,  do_add_atomic_word32,  CALL_INDIRECT | HAS_PTR),
    COMMPAGE_ENTRY(add_atomic_word64,     0, 0x1c0,  unimpl_commpage,       CALL_INDIRECT | HAS_PTR),

    COMMPAGE_ENTRY(mach_absolute_time,    0, 0x200,  unimpl_commpage,       CALL_INDIRECT),
    COMMPAGE_ENTRY(spinlock_try,          1, 0x220,  unimpl_commpage,       CALL_INDIRECT),
    COMMPAGE_ENTRY(spinlock_lock,         1, 0x260,  OSSpinLockLock,        CALL_DIRECT),
    COMMPAGE_ENTRY(spinlock_unlock,       1, 0x2a0,  OSSpinLockUnlock,      CALL_DIRECT),
    COMMPAGE_ENTRY(pthread_getspecific,   0, 0x2c0,  unimpl_commpage,       CALL_INDIRECT),
    COMMPAGE_ENTRY(gettimeofday,          1, 0x2e0,  do_cgettimeofday,      CALL_INDIRECT),
    COMMPAGE_ENTRY(sys_dcache_flush,      0, 0x4e0,  unimpl_commpage,       CALL_INDIRECT),
    COMMPAGE_ENTRY(sys_icache_invalidate, 0, 0x520,  unimpl_commpage,       CALL_INDIRECT),
    COMMPAGE_ENTRY(pthread_self,          0, 0x580,  unimpl_commpage,       CALL_INDIRECT),

    COMMPAGE_ENTRY(relinquish,            0, 0x5c0,  unimpl_commpage,       CALL_INDIRECT),

#ifdef TARGET_I386
    COMMPAGE_ENTRY(bts,                   0, 0x5e0,  unimpl_commpage,       CALL_INDIRECT),
    COMMPAGE_ENTRY(btc,                   0, 0x5f0,  unimpl_commpage,       CALL_INDIRECT),
#endif

    COMMPAGE_ENTRY(bzero,                 2, 0x600,  bzero,                 CALL_DIRECT),
    COMMPAGE_ENTRY(bcopy,                 3, 0x780,  bcopy,                 CALL_DIRECT),
    COMMPAGE_ENTRY(memcpy,                3, 0x7a0,  memcpy,                CALL_DIRECT),

#ifdef TARGET_I386
    COMMPAGE_ENTRY(old_nanotime,          0, 0xf80,  do_nanotime,           CALL_INDIRECT),
    COMMPAGE_ENTRY(memset_pattern,        0, 0xf80,  unimpl_commpage,       CALL_INDIRECT),
    COMMPAGE_ENTRY(long_copy,             0, 0x1200, unimpl_commpage,       CALL_INDIRECT),

    COMMPAGE_ENTRY(sysintegrity,          0, 0x1600, unimpl_commpage,       CALL_INDIRECT),

    COMMPAGE_ENTRY(nanotime,              0, 0x1700, do_nanotime,           CALL_INDIRECT),
#elif TARGET_PPC
    COMMPAGE_ENTRY(compare_and_swap32b,   0, 0xf80,  unimpl_commpage,       CALL_INDIRECT),
    COMMPAGE_ENTRY(compare_and_swap64b,   0, 0xfc0,  unimpl_commpage,       CALL_INDIRECT),
    COMMPAGE_ENTRY(memset_pattern,        0, 0x1000, unimpl_commpage,       CALL_INDIRECT),
    COMMPAGE_ENTRY(bigcopy,               0, 0x1140, unimpl_commpage,       CALL_INDIRECT),
#endif
};


/********************************************************************
 *   Commpage backdoor
 */
static inline void print_commpage_entry(struct commpage_entry entry)
{
    printf("@0x%x %s\n", entry.offset, entry.name);
}

static inline void install_commpage_backdoor_for_entry(struct commpage_entry entry)
{
#ifdef TARGET_I386
    char * commpage = (char*)(COMMPAGE_START+entry.offset);
    int c = 0;
    if(entry.options & HAS_PTR)
    {
        commpage[c++] = (COMMPAGE_START+entry.offset+4) & 0xff;
        commpage[c++] = ((COMMPAGE_START+entry.offset+4) >> 8) & 0xff;
        commpage[c++] = ((COMMPAGE_START+entry.offset+4) >> 16) & 0xff;
        commpage[c++] = ((COMMPAGE_START+entry.offset+4) >> 24) & 0xff;
    }
    commpage[c++] = 0xcd;
    commpage[c++] = 0x79; /* int 0x79 */
    commpage[c++] = 0xc3; /* ret */
#else
    qerror("can't install the commpage on this arch\n");
#endif
}

/********************************************************************
 *   Commpage initialization
 */
void commpage_init(void)
{
#if (defined(__i386__) ^ defined(TARGET_I386)) || (defined(_ARCH_PPC) ^ defined(TARGET_PPC))
    int i;
    void * commpage = (void *)target_mmap( COMMPAGE_START, COMMPAGE_SIZE,
                           PROT_WRITE | PROT_READ, MAP_ANONYMOUS | MAP_FIXED, -1, 0);
    if((int)commpage != COMMPAGE_START)
        qerror("can't allocate the commpage\n");

    bzero(commpage, COMMPAGE_SIZE);

    /* XXX: commpage data not handled */

    for(i = 0; i < ARRAY_SIZE(commpage_entries); i++)
        install_commpage_backdoor_for_entry(commpage_entries[i]);
#else
    /* simply map our pages so they can be executed
       XXX: we don't really want to do that since in the ppc on ppc situation we may
       not able to run commpages host optimized instructions (like G5's on a G5),
       hence this is sometimes a broken fix. */
    page_set_flags(COMMPAGE_START, COMMPAGE_START+COMMPAGE_SIZE, PROT_EXEC | PROT_READ | PAGE_VALID);
#endif
}

/********************************************************************
 *   Commpage implementation
 */
void do_compare_and_swap32(void *cpu_env, int num)
{
#ifdef TARGET_I386
    uint32_t old = ((CPUX86State*)cpu_env)->regs[R_EAX];
    uint32_t *value = (uint32_t*)((CPUX86State*)cpu_env)->regs[R_ECX];
    DPRINTF("commpage: compare_and_swap32(%x,new,%p)\n", old, value);

    if(old == tswap32(*value))
    {
        uint32_t new = ((CPUX86State*)cpu_env)->regs[R_EDX];
        *value = tswap32(new);
        /* set zf flag */
        ((CPUX86State*)cpu_env)->eflags |= 0x40;
    }
    else
    {
        ((CPUX86State*)cpu_env)->regs[R_EAX] = tswap32(*value);
        /* unset zf flag */
        ((CPUX86State*)cpu_env)->eflags &= ~0x40;
    }
#else
    qerror("do_compare_and_swap32 unimplemented");
#endif
}

void do_compare_and_swap64(void *cpu_env, int num)
{
#ifdef TARGET_I386
    /* OSAtomicCompareAndSwap64 is not available on non 64 bits ppc, here is a raw implementation */
    uint64_t old, new, swapped_val;
    uint64_t *value = (uint64_t*)((CPUX86State*)cpu_env)->regs[R_ESI];
    old = (uint64_t)((uint64_t)((CPUX86State*)cpu_env)->regs[R_EDX]) << 32 | (uint64_t)((CPUX86State*)cpu_env)->regs[R_EAX];

    DPRINTF("commpage: compare_and_swap64(%" PRIx64 ",new,%p)\n", old, value);
    swapped_val = tswap64(*value);

    if(old == swapped_val)
    {
        new = (uint64_t)((uint64_t)((CPUX86State*)cpu_env)->regs[R_ECX]) << 32 | (uint64_t)((CPUX86State*)cpu_env)->regs[R_EBX];
        *value = tswap64(new);
        /* set zf flag */
        ((CPUX86State*)cpu_env)->eflags |= 0x40;
    }
    else
    {
        ((CPUX86State*)cpu_env)->regs[R_EAX] = (uint32_t)(swapped_val);
        ((CPUX86State*)cpu_env)->regs[R_EDX] = (uint32_t)(swapped_val >> 32);
        /* unset zf flag */
        ((CPUX86State*)cpu_env)->eflags &= ~0x40;
    }
#else
    qerror("do_compare_and_swap64 unimplemented");
#endif
}

void do_add_atomic_word32(void *cpu_env, int num)
{
#ifdef TARGET_I386
    uint32_t amt = ((CPUX86State*)cpu_env)->regs[R_EAX];
    uint32_t *value = (uint32_t*)((CPUX86State*)cpu_env)->regs[R_EDX];
    uint32_t swapped_value = tswap32(*value);

    DPRINTF("commpage: add_atomic_word32(%x,%p)\n", amt, value);

    /* old value in EAX */
    ((CPUX86State*)cpu_env)->regs[R_EAX] = swapped_value;
    *value = tswap32(swapped_value + amt);
#else
    qerror("do_add_atomic_word32 unimplemented");
#endif
}

void do_cgettimeofday(void *cpu_env, int num, uint32_t arg1)
{
#ifdef TARGET_I386
    extern int __commpage_gettimeofday(struct timeval *);
    DPRINTF("commpage: gettimeofday(0x%x)\n", arg1);
    struct timeval *time = (struct timeval *)arg1;
    int ret = __commpage_gettimeofday(time);
    tswap32s((uint32_t*)&time->tv_sec);
    tswap32s((uint32_t*)&time->tv_usec);
    ((CPUX86State*)cpu_env)->regs[R_EAX] = ret; /* Success */
#else
    qerror("do_gettimeofday unimplemented");
#endif
}

void do_nanotime(void *cpu_env, int num)
{
#ifdef TARGET_I386
    uint64_t t = mach_absolute_time();
    ((CPUX86State*)cpu_env)->regs[R_EAX] = (int)(t & 0xffffffff);
    ((CPUX86State*)cpu_env)->regs[R_EDX] = (int)((t >> 32) & 0xffffffff);
#else
    qerror("do_nanotime unimplemented");
#endif
}

void unimpl_commpage(void *cpu_env, int num)
{
    qerror("qemu: commpage function 0x%x not implemented\n", num);
}

/********************************************************************
 *   do_commpage - called by the main cpu loop
 */
void
do_commpage(void *cpu_env, int num, uint32_t arg1, uint32_t arg2, uint32_t arg3,
                uint32_t arg4, uint32_t arg5, uint32_t arg6, uint32_t arg7,
                uint32_t arg8)
{
    int i, found = 0;

    arg1 = tswap32(arg1);
    arg2 = tswap32(arg2);
    arg3 = tswap32(arg3);
    arg4 = tswap32(arg4);
    arg5 = tswap32(arg5);
    arg6 = tswap32(arg6);
    arg7 = tswap32(arg7);
    arg8 = tswap32(arg8);

    num = num-COMMPAGE_START-2;

    for(i = 0; i < ARRAY_SIZE(commpage_entries); i++) {
        if( num == commpage_code_num(&commpage_entries[i]) )
        {
            DPRINTF("commpage: %s %s\n", commpage_entries[i].name, commpage_is_indirect(&commpage_entries[i]) ? "[indirect]" : "[direct]");
            found = 1;
            if(commpage_is_indirect(&commpage_entries[i]))
            {
                commpage_indirect_function_t function = (commpage_indirect_function_t)commpage_entries[i].function;
                function(cpu_env, num, arg1, arg2, arg3,
                    arg4, arg5, arg6, arg7, arg8);
            }
            else
            {
                commpage_entries[i].function(arg1, arg2, arg3,
                    arg4, arg5, arg6, arg7, arg8);
            }
            break;
        }
    }

    if(!found)
    {
        gemu_log("qemu: commpage function 0x%x not defined\n", num);
        gdb_handlesig (cpu_env, SIGTRAP);
        exit(-1);
    }
}
Commit	Line	Data
831b7825 TS	1	/*
	2	* Commpage syscalls
	3	*
	4	* Copyright (c) 2006 Pierre d'Herbemont
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program 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
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
8167ee88	17	* along with this program; if not, see <http://www.gnu.org/licenses/>.
831b7825 TS	18	*/
	19	#include <fcntl.h>
	20	#include <stdio.h>
	21	#include <stdlib.h>
	22	#include <errno.h>
	23
	24	#include <mach/message.h>
	25	#include <mach/mach.h>
	26	#include <mach/mach_time.h>
	27	#include <sys/time.h>
	28	#include <sys/mman.h>
	29	#include <libkern/OSAtomic.h>
	30
	31	#include "qemu.h"
	32
	33	//#define DEBUG_COMMPAGE
	34
	35	#ifdef DEBUG_COMMPAGE
93fcfe39	36	# define DPRINTF(...) do { qemu_log(__VA_ARGS__); printf(__VA_ARGS__); } while(0)
831b7825	37	#else
93fcfe39	38	# define DPRINTF(...) do { qemu_log(__VA_ARGS__); } while(0)
831b7825 TS	39	#endif
	40
	41	/********************************************************************
	42	* Commpage definitions
	43	*/
	44	#ifdef TARGET_I386
	45	/* Reserve space for the commpage see xnu/osfmk/i386/cpu_capabilities.h */
	46	# define COMMPAGE_START (-16 * 4096) /* base address is -20 * 4096 */
	47	# define COMMPAGE_SIZE (0x1240) /* _COMM_PAGE_AREA_LENGTH is 19 * 4096 */
	48	#elif defined(TARGET_PPC)
	49	/* Reserve space for the commpage see xnu/osfmk/ppc/cpu_capabilities.h */
	50	# define COMMPAGE_START (-8*4096)
	51	# define COMMPAGE_SIZE (24096) / its _COMM_PAGE_AREA_USED but _COMM_PAGE_AREA_LENGTH is 74096 /
	52	#endif
	53
	54	void do_compare_and_swap32(void *cpu_env, int num);
	55	void do_compare_and_swap64(void *cpu_env, int num);
	56	void do_add_atomic_word32(void *cpu_env, int num);
	57	void do_cgettimeofday(void *cpu_env, int num, uint32_t arg1);
	58	void do_nanotime(void *cpu_env, int num);
	59
	60	void unimpl_commpage(void *cpu_env, int num);
	61
	62	typedef void (*commpage_8args_function_t)(uint32_t arg1, uint32_t arg2, uint32_t arg3,
	63	uint32_t arg4, uint32_t arg5, uint32_t arg6, uint32_t arg7,
	64	uint32_t arg8);
	65	typedef void (commpage_indirect_function_t)(void cpu_env, int num, uint32_t arg1,
	66	uint32_t arg2, uint32_t arg3, uint32_t arg4, uint32_t arg5,
	67	uint32_t arg6, uint32_t arg7, uint32_t arg8);
	68
	69	#define HAS_PTR 0x10
	70	#define NO_PTR 0x20
	71	#define CALL_DIRECT 0x1
	72	#define CALL_INDIRECT 0x2
	73
	74	#define COMMPAGE_ENTRY(name, nargs, offset, func, options) \
	75	{ #name, offset, nargs, options, (commpage_8args_function_t)func }
	76
	77	struct commpage_entry {
	78	char * name;
	79	int offset;
	80	int nargs;
	81	char options;
	82	commpage_8args_function_t function;
	83	};
	84
	85	static inline int commpage_code_num(struct commpage_entry *entry)
	86	{
	87	if((entry->options & HAS_PTR))
	88	return entry->offset + 4;
	89	else
	90	return entry->offset;
	91	}
	92
	93	static inline int commpage_is_indirect(struct commpage_entry *entry)
	94	{
	95	return !(entry->options & CALL_DIRECT);
	96	}
	97
	98	/********************************************************************
	99	* Commpage entry
	100	*/
	101	static struct commpage_entry commpage_entries[] =
	102	{
103	COMMPAGE_ENTRY(compare_and_swap32, 0, 0x080, do_compare_and_swap32, CALL_INDIRECT \| HAS_PTR),
104	COMMPAGE_ENTRY(compare_and_swap64, 0, 0x0c0, do_compare_and_swap64, CALL_INDIRECT \| HAS_PTR),
105	COMMPAGE_ENTRY(enqueue, 0, 0x100, unimpl_commpage, CALL_INDIRECT),
106	COMMPAGE_ENTRY(dequeue, 0, 0x140, unimpl_commpage, CALL_INDIRECT),
107	COMMPAGE_ENTRY(memory_barrier, 0, 0x180, unimpl_commpage, CALL_INDIRECT),
108	COMMPAGE_ENTRY(add_atomic_word32, 0, 0x1a0, do_add_atomic_word32, CALL_INDIRECT \| HAS_PTR),
109	COMMPAGE_ENTRY(add_atomic_word64, 0, 0x1c0, unimpl_commpage, CALL_INDIRECT \| HAS_PTR),
110
111	COMMPAGE_ENTRY(mach_absolute_time, 0, 0x200, unimpl_commpage, CALL_INDIRECT),
c227f099	112	COMMPAGE_ENTRY(spinlock_try, 1, 0x220, unimpl_commpage, CALL_INDIRECT),
831b7825 TS	113	COMMPAGE_ENTRY(spinlock_lock, 1, 0x260, OSSpinLockLock, CALL_DIRECT),
	114	COMMPAGE_ENTRY(spinlock_unlock, 1, 0x2a0, OSSpinLockUnlock, CALL_DIRECT),
	115	COMMPAGE_ENTRY(pthread_getspecific, 0, 0x2c0, unimpl_commpage, CALL_INDIRECT),
2a252826 FB	116	COMMPAGE_ENTRY(gettimeofday, 1, 0x2e0, do_cgettimeofday, CALL_INDIRECT),
	117	COMMPAGE_ENTRY(sys_dcache_flush, 0, 0x4e0, unimpl_commpage, CALL_INDIRECT),
	118	COMMPAGE_ENTRY(sys_icache_invalidate, 0, 0x520, unimpl_commpage, CALL_INDIRECT),
	119	COMMPAGE_ENTRY(pthread_self, 0, 0x580, unimpl_commpage, CALL_INDIRECT),
831b7825 TS	120
	121	COMMPAGE_ENTRY(relinquish, 0, 0x5c0, unimpl_commpage, CALL_INDIRECT),
	122
	123	#ifdef TARGET_I386
	124	COMMPAGE_ENTRY(bts, 0, 0x5e0, unimpl_commpage, CALL_INDIRECT),
	125	COMMPAGE_ENTRY(btc, 0, 0x5f0, unimpl_commpage, CALL_INDIRECT),
	126	#endif
	127
	128	COMMPAGE_ENTRY(bzero, 2, 0x600, bzero, CALL_DIRECT),
	129	COMMPAGE_ENTRY(bcopy, 3, 0x780, bcopy, CALL_DIRECT),
	130	COMMPAGE_ENTRY(memcpy, 3, 0x7a0, memcpy, CALL_DIRECT),
	131
	132	#ifdef TARGET_I386
	133	COMMPAGE_ENTRY(old_nanotime, 0, 0xf80, do_nanotime, CALL_INDIRECT),
	134	COMMPAGE_ENTRY(memset_pattern, 0, 0xf80, unimpl_commpage, CALL_INDIRECT),
	135	COMMPAGE_ENTRY(long_copy, 0, 0x1200, unimpl_commpage, CALL_INDIRECT),
	136
	137	COMMPAGE_ENTRY(sysintegrity, 0, 0x1600, unimpl_commpage, CALL_INDIRECT),
	138
	139	COMMPAGE_ENTRY(nanotime, 0, 0x1700, do_nanotime, CALL_INDIRECT),
	140	#elif TARGET_PPC
	141	COMMPAGE_ENTRY(compare_and_swap32b, 0, 0xf80, unimpl_commpage, CALL_INDIRECT),
	142	COMMPAGE_ENTRY(compare_and_swap64b, 0, 0xfc0, unimpl_commpage, CALL_INDIRECT),
	143	COMMPAGE_ENTRY(memset_pattern, 0, 0x1000, unimpl_commpage, CALL_INDIRECT),
	144	COMMPAGE_ENTRY(bigcopy, 0, 0x1140, unimpl_commpage, CALL_INDIRECT),
	145	#endif
	146	};
	147
	148
	149	/********************************************************************
	150	* Commpage backdoor
	151	*/
	152	static inline void print_commpage_entry(struct commpage_entry entry)
	153	{
	154	printf("@0x%x %s\n", entry.offset, entry.name);
	155	}
	156
	157	static inline void install_commpage_backdoor_for_entry(struct commpage_entry entry)
	158	{
	159	#ifdef TARGET_I386
	160	char * commpage = (char*)(COMMPAGE_START+entry.offset);
	161	int c = 0;
	162	if(entry.options & HAS_PTR)
	163	{
	164	commpage[c++] = (COMMPAGE_START+entry.offset+4) & 0xff;
	165	commpage[c++] = ((COMMPAGE_START+entry.offset+4) >> 8) & 0xff;
	166	commpage[c++] = ((COMMPAGE_START+entry.offset+4) >> 16) & 0xff;
	167	commpage[c++] = ((COMMPAGE_START+entry.offset+4) >> 24) & 0xff;
	168	}
	169	commpage[c++] = 0xcd;
	170	commpage[c++] = 0x79; /* int 0x79 */
	171	commpage[c++] = 0xc3; /* ret */
	172	#else
	173	qerror("can't install the commpage on this arch\n");
	174	#endif
	175	}
	176
	177	/********************************************************************
	178	* Commpage initialization
	179	*/
	180	void commpage_init(void)
	181	{
e58ffeb3	182	#if (defined(__i386__) ^ defined(TARGET_I386)) \|\| (defined(_ARCH_PPC) ^ defined(TARGET_PPC))
831b7825 TS	183	int i;
	184	void * commpage = (void *)target_mmap( COMMPAGE_START, COMMPAGE_SIZE,
	185	PROT_WRITE \| PROT_READ, MAP_ANONYMOUS \| MAP_FIXED, -1, 0);
	186	if((int)commpage != COMMPAGE_START)
	187	qerror("can't allocate the commpage\n");
	188
	189	bzero(commpage, COMMPAGE_SIZE);
	190
	191	/* XXX: commpage data not handled */
	192
b1503cda	193	for(i = 0; i < ARRAY_SIZE(commpage_entries); i++)
831b7825 TS	194	install_commpage_backdoor_for_entry(commpage_entries[i]);
	195	#else
	196	/* simply map our pages so they can be executed
	197	XXX: we don't really want to do that since in the ppc on ppc situation we may
	198	not able to run commpages host optimized instructions (like G5's on a G5),
	199	hence this is sometimes a broken fix. */
	200	page_set_flags(COMMPAGE_START, COMMPAGE_START+COMMPAGE_SIZE, PROT_EXEC \| PROT_READ \| PAGE_VALID);
	201	#endif
	202	}
	203
	204	/********************************************************************
	205	* Commpage implementation
	206	*/
	207	void do_compare_and_swap32(void *cpu_env, int num)
	208	{
	209	#ifdef TARGET_I386
	210	uint32_t old = ((CPUX86State*)cpu_env)->regs[R_EAX];
	211	uint32_t value = (uint32_t)((CPUX86State*)cpu_env)->regs[R_ECX];
	212	DPRINTF("commpage: compare_and_swap32(%x,new,%p)\n", old, value);
	213
70afb8ff	214	if(old == tswap32(*value))
831b7825 TS	215	{
	216	uint32_t new = ((CPUX86State*)cpu_env)->regs[R_EDX];
	217	*value = tswap32(new);
	218	/* set zf flag */
	219	((CPUX86State*)cpu_env)->eflags \|= 0x40;
	220	}
	221	else
	222	{
	223	((CPUX86State)cpu_env)->regs[R_EAX] = tswap32(value);
	224	/* unset zf flag */
	225	((CPUX86State*)cpu_env)->eflags &= ~0x40;
	226	}
	227	#else
	228	qerror("do_compare_and_swap32 unimplemented");
	229	#endif
	230	}
	231
	232	void do_compare_and_swap64(void *cpu_env, int num)
	233	{
	234	#ifdef TARGET_I386
	235	/* OSAtomicCompareAndSwap64 is not available on non 64 bits ppc, here is a raw implementation */
	236	uint64_t old, new, swapped_val;
	237	uint64_t value = (uint64_t)((CPUX86State*)cpu_env)->regs[R_ESI];
	238	old = (uint64_t)((uint64_t)((CPUX86State)cpu_env)->regs[R_EDX]) << 32 \| (uint64_t)((CPUX86State)cpu_env)->regs[R_EAX];
	239
0bfcd599	240	DPRINTF("commpage: compare_and_swap64(%" PRIx64 ",new,%p)\n", old, value);
831b7825 TS	241	swapped_val = tswap64(*value);
	242
	243	if(old == swapped_val)
	244	{
	245	new = (uint64_t)((uint64_t)((CPUX86State)cpu_env)->regs[R_ECX]) << 32 \| (uint64_t)((CPUX86State)cpu_env)->regs[R_EBX];
	246	*value = tswap64(new);
	247	/* set zf flag */
	248	((CPUX86State*)cpu_env)->eflags \|= 0x40;
	249	}
	250	else
	251	{
	252	((CPUX86State*)cpu_env)->regs[R_EAX] = (uint32_t)(swapped_val);
	253	((CPUX86State*)cpu_env)->regs[R_EDX] = (uint32_t)(swapped_val >> 32);
	254	/* unset zf flag */
	255	((CPUX86State*)cpu_env)->eflags &= ~0x40;
	256	}
	257	#else
	258	qerror("do_compare_and_swap64 unimplemented");
	259	#endif
	260	}
	261
	262	void do_add_atomic_word32(void *cpu_env, int num)
	263	{
	264	#ifdef TARGET_I386
	265	uint32_t amt = ((CPUX86State*)cpu_env)->regs[R_EAX];
	266	uint32_t value = (uint32_t)((CPUX86State*)cpu_env)->regs[R_EDX];
	267	uint32_t swapped_value = tswap32(*value);
	268
	269	DPRINTF("commpage: add_atomic_word32(%x,%p)\n", amt, value);
	270
	271	/* old value in EAX */
	272	((CPUX86State*)cpu_env)->regs[R_EAX] = swapped_value;
	273	*value = tswap32(swapped_value + amt);
	274	#else
	275	qerror("do_add_atomic_word32 unimplemented");
	276	#endif
	277	}
	278
	279	void do_cgettimeofday(void *cpu_env, int num, uint32_t arg1)
	280	{
	281	#ifdef TARGET_I386
	282	extern int __commpage_gettimeofday(struct timeval *);
	283	DPRINTF("commpage: gettimeofday(0x%x)\n", arg1);
	284	struct timeval time = (struct timeval )arg1;
	285	int ret = __commpage_gettimeofday(time);
	286	tswap32s((uint32_t*)&time->tv_sec);
	287	tswap32s((uint32_t*)&time->tv_usec);
	288	((CPUX86State)cpu_env)->regs[R_EAX] = ret; / Success */
	289	#else
	290	qerror("do_gettimeofday unimplemented");
	291	#endif
	292	}
	293
	294	void do_nanotime(void *cpu_env, int num)
	295	{
	296	#ifdef TARGET_I386
	297	uint64_t t = mach_absolute_time();
	298	((CPUX86State*)cpu_env)->regs[R_EAX] = (int)(t & 0xffffffff);
	299	((CPUX86State*)cpu_env)->regs[R_EDX] = (int)((t >> 32) & 0xffffffff);
	300	#else
	301	qerror("do_nanotime unimplemented");
	302	#endif
	303	}
	304
305	void unimpl_commpage(void *cpu_env, int num)
306	{
2a252826	307	qerror("qemu: commpage function 0x%x not implemented\n", num);
831b7825 TS	308	}
	309
	310	/********************************************************************
	311	* do_commpage - called by the main cpu loop
	312	*/
	313	void
	314	do_commpage(void *cpu_env, int num, uint32_t arg1, uint32_t arg2, uint32_t arg3,
	315	uint32_t arg4, uint32_t arg5, uint32_t arg6, uint32_t arg7,
	316	uint32_t arg8)
	317	{
	318	int i, found = 0;
	319
	320	arg1 = tswap32(arg1);
	321	arg2 = tswap32(arg2);
	322	arg3 = tswap32(arg3);
	323	arg4 = tswap32(arg4);
	324	arg5 = tswap32(arg5);
	325	arg6 = tswap32(arg6);
	326	arg7 = tswap32(arg7);
	327	arg8 = tswap32(arg8);
	328
	329	num = num-COMMPAGE_START-2;
	330
b1503cda	331	for(i = 0; i < ARRAY_SIZE(commpage_entries); i++) {
831b7825 TS	332	if( num == commpage_code_num(&commpage_entries[i]) )
	333	{
	334	DPRINTF("commpage: %s %s\n", commpage_entries[i].name, commpage_is_indirect(&commpage_entries[i]) ? "[indirect]" : "[direct]");
	335	found = 1;
	336	if(commpage_is_indirect(&commpage_entries[i]))
	337	{
	338	commpage_indirect_function_t function = (commpage_indirect_function_t)commpage_entries[i].function;
	339	function(cpu_env, num, arg1, arg2, arg3,
	340	arg4, arg5, arg6, arg7, arg8);
	341	}
	342	else
	343	{
	344	commpage_entries[i].function(arg1, arg2, arg3,
	345	arg4, arg5, arg6, arg7, arg8);
	346	}
	347	break;
	348	}
	349	}
	350
	351	if(!found)
	352	{
	353	gemu_log("qemu: commpage function 0x%x not defined\n", num);
	354	gdb_handlesig (cpu_env, SIGTRAP);
	355	exit(-1);
	356	}
	357	}