[mirror_qemu.git] / bsd-user / qemu.h

/*
 *  qemu bsd user mode definition
 *
 *  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/>.
 */
#ifndef QEMU_H
#define QEMU_H

#include <signal.h>
#include <string.h>

#include "cpu.h"
#include "exec/cpu_ldst.h"

#undef DEBUG_REMAP
#ifdef DEBUG_REMAP
#include <stdlib.h>
#endif /* DEBUG_REMAP */

#include "exec/user/abitypes.h"

enum BSDType {
    target_freebsd,
    target_netbsd,
    target_openbsd,
};
extern enum BSDType bsd_type;

#include "syscall_defs.h"
#include "syscall.h"
#include "target_signal.h"
#include "exec/gdbstub.h"

#if defined(CONFIG_USE_NPTL)
#define THREAD __thread
#else
#define THREAD
#endif

/* This struct is used to hold certain information about the image.
 * Basically, it replicates in user space what would be certain
 * task_struct fields in the kernel
 */
struct image_info {
    abi_ulong load_addr;
    abi_ulong start_code;
    abi_ulong end_code;
    abi_ulong start_data;
    abi_ulong end_data;
    abi_ulong start_brk;
    abi_ulong brk;
    abi_ulong start_mmap;
    abi_ulong mmap;
    abi_ulong rss;
    abi_ulong start_stack;
    abi_ulong entry;
    abi_ulong code_offset;
    abi_ulong data_offset;
    int       personality;
};

#define MAX_SIGQUEUE_SIZE 1024

struct sigqueue {
    struct sigqueue *next;
    //target_siginfo_t info;
};

struct emulated_sigtable {
    int pending; /* true if signal is pending */
    struct sigqueue *first;
    struct sigqueue info; /* in order to always have memory for the
                             first signal, we put it here */
};

/* NOTE: we force a big alignment so that the stack stored after is
   aligned too */
typedef struct TaskState {
    struct TaskState *next;
    int used; /* non zero if used */
    struct image_info *info;

    struct emulated_sigtable sigtab[TARGET_NSIG];
    struct sigqueue sigqueue_table[MAX_SIGQUEUE_SIZE]; /* siginfo queue */
    struct sigqueue *first_free; /* first free siginfo queue entry */
    int signal_pending; /* non zero if a signal may be pending */

    uint8_t stack[0];
} __attribute__((aligned(16))) TaskState;

void init_task_state(TaskState *ts);
extern const char *qemu_uname_release;
#if defined(CONFIG_USE_GUEST_BASE)
extern unsigned long mmap_min_addr;
#endif

/* ??? See if we can avoid exposing so much of the loader internals.  */
/*
 * MAX_ARG_PAGES defines the number of pages allocated for arguments
 * and envelope for the new program. 32 should suffice, this gives
 * a maximum env+arg of 128kB w/4KB pages!
 */
#define MAX_ARG_PAGES 32

/*
 * This structure is used to hold the arguments that are
 * used when loading binaries.
 */
struct linux_binprm {
        char buf[128];
        void *page[MAX_ARG_PAGES];
        abi_ulong p;
        int fd;
        int e_uid, e_gid;
        int argc, envc;
        char **argv;
        char **envp;
        char * filename;        /* Name of binary */
};

void do_init_thread(struct target_pt_regs *regs, struct image_info *infop);
abi_ulong loader_build_argptr(int envc, int argc, abi_ulong sp,
                              abi_ulong stringp, int push_ptr);
int loader_exec(const char * filename, char ** argv, char ** envp,
             struct target_pt_regs * regs, struct image_info *infop);

int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs,
                    struct image_info * info);
int load_flt_binary(struct linux_binprm * bprm, struct target_pt_regs * regs,
                    struct image_info * info);

abi_long memcpy_to_target(abi_ulong dest, const void *src,
                          unsigned long len);
void target_set_brk(abi_ulong new_brk);
abi_long do_brk(abi_ulong new_brk);
void syscall_init(void);
abi_long do_freebsd_syscall(void *cpu_env, int num, abi_long arg1,
                            abi_long arg2, abi_long arg3, abi_long arg4,
                            abi_long arg5, abi_long arg6, abi_long arg7,
                            abi_long arg8);
abi_long do_netbsd_syscall(void *cpu_env, int num, abi_long arg1,
                           abi_long arg2, abi_long arg3, abi_long arg4,
                           abi_long arg5, abi_long arg6);
abi_long do_openbsd_syscall(void *cpu_env, int num, abi_long arg1,
                            abi_long arg2, abi_long arg3, abi_long arg4,
                            abi_long arg5, abi_long arg6);
void gemu_log(const char *fmt, ...) GCC_FMT_ATTR(1, 2);
extern THREAD CPUState *thread_cpu;
void cpu_loop(CPUArchState *env);
char *target_strerror(int err);
int get_osversion(void);
void fork_start(void);
void fork_end(int child);

#include "qemu/log.h"

/* strace.c */
struct syscallname {
    int nr;
    const char *name;
    const char *format;
    void (*call)(const struct syscallname *,
                 abi_long, abi_long, abi_long,
                 abi_long, abi_long, abi_long);
    void (*result)(const struct syscallname *, abi_long);
};

void
print_freebsd_syscall(int num,
                      abi_long arg1, abi_long arg2, abi_long arg3,
                      abi_long arg4, abi_long arg5, abi_long arg6);
void print_freebsd_syscall_ret(int num, abi_long ret);
void
print_netbsd_syscall(int num,
                     abi_long arg1, abi_long arg2, abi_long arg3,
                     abi_long arg4, abi_long arg5, abi_long arg6);
void print_netbsd_syscall_ret(int num, abi_long ret);
void
print_openbsd_syscall(int num,
                      abi_long arg1, abi_long arg2, abi_long arg3,
                      abi_long arg4, abi_long arg5, abi_long arg6);
void print_openbsd_syscall_ret(int num, abi_long ret);
extern int do_strace;

/* signal.c */
void process_pending_signals(CPUArchState *cpu_env);
void signal_init(void);
//int queue_signal(CPUArchState *env, int sig, target_siginfo_t *info);
//void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info);
//void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo);
long do_sigreturn(CPUArchState *env);
long do_rt_sigreturn(CPUArchState *env);
abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp);

/* mmap.c */
int target_mprotect(abi_ulong start, abi_ulong len, int prot);
abi_long target_mmap(abi_ulong start, abi_ulong len, int prot,
                     int flags, int fd, abi_ulong offset);
int target_munmap(abi_ulong start, abi_ulong len);
abi_long target_mremap(abi_ulong old_addr, abi_ulong old_size,
                       abi_ulong new_size, unsigned long flags,
                       abi_ulong new_addr);
int target_msync(abi_ulong start, abi_ulong len, int flags);
extern unsigned long last_brk;
void mmap_lock(void);
void mmap_unlock(void);
void cpu_list_lock(void);
void cpu_list_unlock(void);
#if defined(CONFIG_USE_NPTL)
void mmap_fork_start(void);
void mmap_fork_end(int child);
#endif

/* main.c */
extern unsigned long x86_stack_size;

/* user access */

#define VERIFY_READ 0
#define VERIFY_WRITE 1 /* implies read access */

static inline int access_ok(int type, abi_ulong addr, abi_ulong size)
{
    return page_check_range((target_ulong)addr, size,
                            (type == VERIFY_READ) ? PAGE_READ : (PAGE_READ | PAGE_WRITE)) == 0;
}

/* NOTE __get_user and __put_user use host pointers and don't check access. */
/* These are usually used to access struct data members once the
 * struct has been locked - usually with lock_user_struct().
 */
#define __put_user(x, hptr)\
({\
    int size = sizeof(*hptr);\
    switch(size) {\
    case 1:\
        *(uint8_t *)(hptr) = (uint8_t)(typeof(*hptr))(x);\
        break;\
    case 2:\
        *(uint16_t *)(hptr) = tswap16((typeof(*hptr))(x));\
        break;\
    case 4:\
        *(uint32_t *)(hptr) = tswap32((typeof(*hptr))(x));\
        break;\
    case 8:\
        *(uint64_t *)(hptr) = tswap64((typeof(*hptr))(x));\
        break;\
    default:\
        abort();\
    }\
    0;\
})

#define __get_user(x, hptr) \
({\
    int size = sizeof(*hptr);\
    switch(size) {\
    case 1:\
        x = (typeof(*hptr))*(uint8_t *)(hptr);\
        break;\
    case 2:\
        x = (typeof(*hptr))tswap16(*(uint16_t *)(hptr));\
        break;\
    case 4:\
        x = (typeof(*hptr))tswap32(*(uint32_t *)(hptr));\
        break;\
    case 8:\
        x = (typeof(*hptr))tswap64(*(uint64_t *)(hptr));\
        break;\
    default:\
        /* avoid warning */\
        x = 0;\
        abort();\
    }\
    0;\
})

/* put_user()/get_user() take a guest address and check access */
/* These are usually used to access an atomic data type, such as an int,
 * that has been passed by address.  These internally perform locking
 * and unlocking on the data type.
 */
#define put_user(x, gaddr, target_type)                                 \
({                                                                      \
    abi_ulong __gaddr = (gaddr);                                        \
    target_type *__hptr;                                                \
    abi_long __ret;                                                     \
    if ((__hptr = lock_user(VERIFY_WRITE, __gaddr, sizeof(target_type), 0))) { \
        __ret = __put_user((x), __hptr);                                \
        unlock_user(__hptr, __gaddr, sizeof(target_type));              \
    } else                                                              \
        __ret = -TARGET_EFAULT;                                         \
    __ret;                                                              \
})

#define get_user(x, gaddr, target_type)                                 \
({                                                                      \
    abi_ulong __gaddr = (gaddr);                                        \
    target_type *__hptr;                                                \
    abi_long __ret;                                                     \
    if ((__hptr = lock_user(VERIFY_READ, __gaddr, sizeof(target_type), 1))) { \
        __ret = __get_user((x), __hptr);                                \
        unlock_user(__hptr, __gaddr, 0);                                \
    } else {                                                            \
        /* avoid warning */                                             \
        (x) = 0;                                                        \
        __ret = -TARGET_EFAULT;                                         \
    }                                                                   \
    __ret;                                                              \
})

#define put_user_ual(x, gaddr) put_user((x), (gaddr), abi_ulong)
#define put_user_sal(x, gaddr) put_user((x), (gaddr), abi_long)
#define put_user_u64(x, gaddr) put_user((x), (gaddr), uint64_t)
#define put_user_s64(x, gaddr) put_user((x), (gaddr), int64_t)
#define put_user_u32(x, gaddr) put_user((x), (gaddr), uint32_t)
#define put_user_s32(x, gaddr) put_user((x), (gaddr), int32_t)
#define put_user_u16(x, gaddr) put_user((x), (gaddr), uint16_t)
#define put_user_s16(x, gaddr) put_user((x), (gaddr), int16_t)
#define put_user_u8(x, gaddr)  put_user((x), (gaddr), uint8_t)
#define put_user_s8(x, gaddr)  put_user((x), (gaddr), int8_t)

#define get_user_ual(x, gaddr) get_user((x), (gaddr), abi_ulong)
#define get_user_sal(x, gaddr) get_user((x), (gaddr), abi_long)
#define get_user_u64(x, gaddr) get_user((x), (gaddr), uint64_t)
#define get_user_s64(x, gaddr) get_user((x), (gaddr), int64_t)
#define get_user_u32(x, gaddr) get_user((x), (gaddr), uint32_t)
#define get_user_s32(x, gaddr) get_user((x), (gaddr), int32_t)
#define get_user_u16(x, gaddr) get_user((x), (gaddr), uint16_t)
#define get_user_s16(x, gaddr) get_user((x), (gaddr), int16_t)
#define get_user_u8(x, gaddr)  get_user((x), (gaddr), uint8_t)
#define get_user_s8(x, gaddr)  get_user((x), (gaddr), int8_t)

/* copy_from_user() and copy_to_user() are usually used to copy data
 * buffers between the target and host.  These internally perform
 * locking/unlocking of the memory.
 */
abi_long copy_from_user(void *hptr, abi_ulong gaddr, size_t len);
abi_long copy_to_user(abi_ulong gaddr, void *hptr, size_t len);

/* Functions for accessing guest memory.  The tget and tput functions
   read/write single values, byteswapping as necessary.  The lock_user function
   gets a pointer to a contiguous area of guest memory, but does not perform
   any byteswapping.  lock_user may return either a pointer to the guest
   memory, or a temporary buffer.  */

/* Lock an area of guest memory into the host.  If copy is true then the
   host area will have the same contents as the guest.  */
static inline void *lock_user(int type, abi_ulong guest_addr, long len, int copy)
{
    if (!access_ok(type, guest_addr, len))
        return NULL;
#ifdef DEBUG_REMAP
    {
        void *addr;
        addr = malloc(len);
        if (copy)
            memcpy(addr, g2h(guest_addr), len);
        else
            memset(addr, 0, len);
        return addr;
    }
#else
    return g2h(guest_addr);
#endif
}

/* Unlock an area of guest memory.  The first LEN bytes must be
   flushed back to guest memory. host_ptr = NULL is explicitly
   allowed and does nothing. */
static inline void unlock_user(void *host_ptr, abi_ulong guest_addr,
                               long len)
{

#ifdef DEBUG_REMAP
    if (!host_ptr)
        return;
    if (host_ptr == g2h(guest_addr))
        return;
    if (len > 0)
        memcpy(g2h(guest_addr), host_ptr, len);
    free(host_ptr);
#endif
}

/* Return the length of a string in target memory or -TARGET_EFAULT if
   access error. */
abi_long target_strlen(abi_ulong gaddr);

/* Like lock_user but for null terminated strings.  */
static inline void *lock_user_string(abi_ulong guest_addr)
{
    abi_long len;
    len = target_strlen(guest_addr);
    if (len < 0)
        return NULL;
    return lock_user(VERIFY_READ, guest_addr, (long)(len + 1), 1);
}

/* Helper macros for locking/unlocking a target struct.  */
#define lock_user_struct(type, host_ptr, guest_addr, copy)      \
    (host_ptr = lock_user(type, guest_addr, sizeof(*host_ptr), copy))
#define unlock_user_struct(host_ptr, guest_addr, copy)          \
    unlock_user(host_ptr, guest_addr, (copy) ? sizeof(*host_ptr) : 0)

#if defined(CONFIG_USE_NPTL)
#include <pthread.h>
#endif

#endif /* QEMU_H */
Commit	Line	Data
88dae46d SB	1	/*
	2	* qemu bsd user mode definition
	3	*
	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License as published by
	6	* the Free Software Foundation; either version 2 of the License, or
	7	* (at your option) any later version.
	8	*
	9	* This program is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
	13	*
	14	* You should have received a copy of the GNU General Public License
	15	* along with this program; if not, see <http://www.gnu.org/licenses/>.
	16	*/
84778508 BS	17	#ifndef QEMU_H
	18	#define QEMU_H
	19
	20	#include <signal.h>
	21	#include <string.h>
	22
	23	#include "cpu.h"
f08b6170	24	#include "exec/cpu_ldst.h"
84778508 BS	25
	26	#undef DEBUG_REMAP
	27	#ifdef DEBUG_REMAP
	28	#include <stdlib.h>
	29	#endif /* DEBUG_REMAP */
	30
022c62cb	31	#include "exec/user/abitypes.h"
84778508 BS	32
	33	enum BSDType {
	34	target_freebsd,
	35	target_netbsd,
	36	target_openbsd,
	37	};
78cfb07f	38	extern enum BSDType bsd_type;
84778508 BS	39
	40	#include "syscall_defs.h"
	41	#include "syscall.h"
	42	#include "target_signal.h"
022c62cb	43	#include "exec/gdbstub.h"
84778508	44
2f7bb878	45	#if defined(CONFIG_USE_NPTL)
84778508 BS	46	#define THREAD __thread
	47	#else
	48	#define THREAD
	49	#endif
	50
	51	/* This struct is used to hold certain information about the image.
	52	* Basically, it replicates in user space what would be certain
	53	* task_struct fields in the kernel
	54	*/
	55	struct image_info {
	56	abi_ulong load_addr;
	57	abi_ulong start_code;
	58	abi_ulong end_code;
	59	abi_ulong start_data;
	60	abi_ulong end_data;
	61	abi_ulong start_brk;
	62	abi_ulong brk;
	63	abi_ulong start_mmap;
	64	abi_ulong mmap;
	65	abi_ulong rss;
	66	abi_ulong start_stack;
	67	abi_ulong entry;
	68	abi_ulong code_offset;
	69	abi_ulong data_offset;
84778508 BS	70	int personality;
	71	};
	72
	73	#define MAX_SIGQUEUE_SIZE 1024
	74
	75	struct sigqueue {
	76	struct sigqueue *next;
	77	//target_siginfo_t info;
	78	};
	79
	80	struct emulated_sigtable {
	81	int pending; /* true if signal is pending */
	82	struct sigqueue *first;
	83	struct sigqueue info; /* in order to always have memory for the
	84	first signal, we put it here */
	85	};
	86
	87	/* NOTE: we force a big alignment so that the stack stored after is
	88	aligned too */
	89	typedef struct TaskState {
	90	struct TaskState *next;
	91	int used; /* non zero if used */
	92	struct image_info *info;
	93
	94	struct emulated_sigtable sigtab[TARGET_NSIG];
	95	struct sigqueue sigqueue_table[MAX_SIGQUEUE_SIZE]; /* siginfo queue */
	96	struct sigqueue first_free; / first free siginfo queue entry */
	97	int signal_pending; /* non zero if a signal may be pending */
	98
	99	uint8_t stack[0];
	100	} __attribute__((aligned(16))) TaskState;
	101
	102	void init_task_state(TaskState *ts);
	103	extern const char *qemu_uname_release;
2fa5d9ba BS	104	#if defined(CONFIG_USE_GUEST_BASE)
	105	extern unsigned long mmap_min_addr;
	106	#endif
84778508 BS	107
	108	/* ??? See if we can avoid exposing so much of the loader internals. */
	109	/*
	110	* MAX_ARG_PAGES defines the number of pages allocated for arguments
	111	* and envelope for the new program. 32 should suffice, this gives
	112	* a maximum env+arg of 128kB w/4KB pages!
	113	*/
	114	#define MAX_ARG_PAGES 32
	115
	116	/*
	117	* This structure is used to hold the arguments that are
	118	* used when loading binaries.
	119	*/
	120	struct linux_binprm {
	121	char buf[128];
	122	void *page[MAX_ARG_PAGES];
	123	abi_ulong p;
	124	int fd;
	125	int e_uid, e_gid;
	126	int argc, envc;
	127	char **argv;
	128	char **envp;
	129	char * filename; /* Name of binary */
	130	};
	131
	132	void do_init_thread(struct target_pt_regs regs, struct image_info infop);
	133	abi_ulong loader_build_argptr(int envc, int argc, abi_ulong sp,
	134	abi_ulong stringp, int push_ptr);
	135	int loader_exec(const char * filename, char argv, char envp,
	136	struct target_pt_regs * regs, struct image_info *infop);
	137
	138	int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs,
	139	struct image_info * info);
	140	int load_flt_binary(struct linux_binprm * bprm, struct target_pt_regs * regs,
	141	struct image_info * info);
	142
	143	abi_long memcpy_to_target(abi_ulong dest, const void *src,
	144	unsigned long len);
	145	void target_set_brk(abi_ulong new_brk);
	146	abi_long do_brk(abi_ulong new_brk);
	147	void syscall_init(void);
	148	abi_long do_freebsd_syscall(void *cpu_env, int num, abi_long arg1,
	149	abi_long arg2, abi_long arg3, abi_long arg4,
78cfb07f JL	150	abi_long arg5, abi_long arg6, abi_long arg7,
78cfb07f JL	151	abi_long arg8);
84778508 BS	152	abi_long do_netbsd_syscall(void *cpu_env, int num, abi_long arg1,
	153	abi_long arg2, abi_long arg3, abi_long arg4,
	154	abi_long arg5, abi_long arg6);
	155	abi_long do_openbsd_syscall(void *cpu_env, int num, abi_long arg1,
	156	abi_long arg2, abi_long arg3, abi_long arg4,
	157	abi_long arg5, abi_long arg6);
e5924d89	158	void gemu_log(const char *fmt, ...) GCC_FMT_ATTR(1, 2);
dca1173c	159	extern THREAD CPUState *thread_cpu;
9349b4f9	160	void cpu_loop(CPUArchState *env);
84778508 BS	161	char *target_strerror(int err);
	162	int get_osversion(void);
	163	void fork_start(void);
	164	void fork_end(int child);
	165
1de7afc9	166	#include "qemu/log.h"
84778508 BS	167
84778508 BS	168	/* strace.c */
88dae46d SB	169	struct syscallname {
	170	int nr;
	171	const char *name;
	172	const char *format;
	173	void (call)(const struct syscallname ,
	174	abi_long, abi_long, abi_long,
	175	abi_long, abi_long, abi_long);
	176	void (result)(const struct syscallname , abi_long);
	177	};
	178
84778508 BS	179	void
	180	print_freebsd_syscall(int num,
	181	abi_long arg1, abi_long arg2, abi_long arg3,
	182	abi_long arg4, abi_long arg5, abi_long arg6);
	183	void print_freebsd_syscall_ret(int num, abi_long ret);
	184	void
	185	print_netbsd_syscall(int num,
	186	abi_long arg1, abi_long arg2, abi_long arg3,
	187	abi_long arg4, abi_long arg5, abi_long arg6);
	188	void print_netbsd_syscall_ret(int num, abi_long ret);
	189	void
	190	print_openbsd_syscall(int num,
	191	abi_long arg1, abi_long arg2, abi_long arg3,
	192	abi_long arg4, abi_long arg5, abi_long arg6);
	193	void print_openbsd_syscall_ret(int num, abi_long ret);
	194	extern int do_strace;
	195
	196	/* signal.c */
9349b4f9	197	void process_pending_signals(CPUArchState *cpu_env);
84778508	198	void signal_init(void);
9349b4f9	199	//int queue_signal(CPUArchState env, int sig, target_siginfo_t info);
84778508 BS	200	//void host_to_target_siginfo(target_siginfo_t tinfo, const siginfo_t info);
84778508 BS	201	//void target_to_host_siginfo(siginfo_t info, const target_siginfo_t tinfo);
9349b4f9 AF	202	long do_sigreturn(CPUArchState *env);
9349b4f9 AF	203	long do_rt_sigreturn(CPUArchState *env);
84778508 BS	204	abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp);
	205
	206	/* mmap.c */
	207	int target_mprotect(abi_ulong start, abi_ulong len, int prot);
	208	abi_long target_mmap(abi_ulong start, abi_ulong len, int prot,
	209	int flags, int fd, abi_ulong offset);
	210	int target_munmap(abi_ulong start, abi_ulong len);
	211	abi_long target_mremap(abi_ulong old_addr, abi_ulong old_size,
	212	abi_ulong new_size, unsigned long flags,
	213	abi_ulong new_addr);
	214	int target_msync(abi_ulong start, abi_ulong len, int flags);
	215	extern unsigned long last_brk;
	216	void mmap_lock(void);
	217	void mmap_unlock(void);
9399f095 BS	218	void cpu_list_lock(void);
9399f095 BS	219	void cpu_list_unlock(void);
2f7bb878	220	#if defined(CONFIG_USE_NPTL)
84778508 BS	221	void mmap_fork_start(void);
	222	void mmap_fork_end(int child);
	223	#endif
	224
28e738dc BS	225	/* main.c */
	226	extern unsigned long x86_stack_size;
	227
84778508 BS	228	/* user access */
	229
	230	#define VERIFY_READ 0
	231	#define VERIFY_WRITE 1 /* implies read access */
	232
	233	static inline int access_ok(int type, abi_ulong addr, abi_ulong size)
	234	{
	235	return page_check_range((target_ulong)addr, size,
	236	(type == VERIFY_READ) ? PAGE_READ : (PAGE_READ \| PAGE_WRITE)) == 0;
	237	}
	238
	239	/* NOTE __get_user and __put_user use host pointers and don't check access. */
	240	/* These are usually used to access struct data members once the
	241	* struct has been locked - usually with lock_user_struct().
	242	*/
	243	#define __put_user(x, hptr)\
	244	({\
	245	int size = sizeof(*hptr);\
	246	switch(size) {\
	247	case 1:\
	248	(uint8_t )(hptr) = (uint8_t)(typeof(*hptr))(x);\
	249	break;\
	250	case 2:\
	251	(uint16_t )(hptr) = tswap16((typeof(*hptr))(x));\
	252	break;\
	253	case 4:\
	254	(uint32_t )(hptr) = tswap32((typeof(*hptr))(x));\
	255	break;\
	256	case 8:\
	257	(uint64_t )(hptr) = tswap64((typeof(*hptr))(x));\
	258	break;\
	259	default:\
	260	abort();\
	261	}\
	262	0;\
	263	})
	264
	265	#define __get_user(x, hptr) \
	266	({\
	267	int size = sizeof(*hptr);\
	268	switch(size) {\
	269	case 1:\
	270	x = (typeof(hptr))(uint8_t *)(hptr);\
	271	break;\
	272	case 2:\
	273	x = (typeof(hptr))tswap16((uint16_t *)(hptr));\
	274	break;\
	275	case 4:\
	276	x = (typeof(hptr))tswap32((uint32_t *)(hptr));\
	277	break;\
	278	case 8:\
	279	x = (typeof(hptr))tswap64((uint64_t *)(hptr));\
	280	break;\
	281	default:\
	282	/* avoid warning */\
	283	x = 0;\
	284	abort();\
	285	}\
	286	0;\
	287	})
	288
	289	/* put_user()/get_user() take a guest address and check access */
	290	/* These are usually used to access an atomic data type, such as an int,
	291	* that has been passed by address. These internally perform locking
292	* and unlocking on the data type.
293	*/
294	#define put_user(x, gaddr, target_type) \
295	({ \
296	abi_ulong __gaddr = (gaddr); \
297	target_type *__hptr; \
298	abi_long __ret; \
299	if ((__hptr = lock_user(VERIFY_WRITE, __gaddr, sizeof(target_type), 0))) { \
300	__ret = __put_user((x), __hptr); \
301	unlock_user(__hptr, __gaddr, sizeof(target_type)); \
302	} else \
303	__ret = -TARGET_EFAULT; \
304	__ret; \
305	})
306
307	#define get_user(x, gaddr, target_type) \
308	({ \
309	abi_ulong __gaddr = (gaddr); \
310	target_type *__hptr; \
311	abi_long __ret; \
312	if ((__hptr = lock_user(VERIFY_READ, __gaddr, sizeof(target_type), 1))) { \
313	__ret = __get_user((x), __hptr); \
314	unlock_user(__hptr, __gaddr, 0); \
315	} else { \
316	/* avoid warning */ \
317	(x) = 0; \
318	__ret = -TARGET_EFAULT; \
319	} \
320	__ret; \
321	})
322
323	#define put_user_ual(x, gaddr) put_user((x), (gaddr), abi_ulong)
324	#define put_user_sal(x, gaddr) put_user((x), (gaddr), abi_long)
325	#define put_user_u64(x, gaddr) put_user((x), (gaddr), uint64_t)
326	#define put_user_s64(x, gaddr) put_user((x), (gaddr), int64_t)
327	#define put_user_u32(x, gaddr) put_user((x), (gaddr), uint32_t)
328	#define put_user_s32(x, gaddr) put_user((x), (gaddr), int32_t)
329	#define put_user_u16(x, gaddr) put_user((x), (gaddr), uint16_t)
330	#define put_user_s16(x, gaddr) put_user((x), (gaddr), int16_t)
331	#define put_user_u8(x, gaddr) put_user((x), (gaddr), uint8_t)
332	#define put_user_s8(x, gaddr) put_user((x), (gaddr), int8_t)
333
334	#define get_user_ual(x, gaddr) get_user((x), (gaddr), abi_ulong)
335	#define get_user_sal(x, gaddr) get_user((x), (gaddr), abi_long)
336	#define get_user_u64(x, gaddr) get_user((x), (gaddr), uint64_t)
337	#define get_user_s64(x, gaddr) get_user((x), (gaddr), int64_t)
338	#define get_user_u32(x, gaddr) get_user((x), (gaddr), uint32_t)
339	#define get_user_s32(x, gaddr) get_user((x), (gaddr), int32_t)
340	#define get_user_u16(x, gaddr) get_user((x), (gaddr), uint16_t)
341	#define get_user_s16(x, gaddr) get_user((x), (gaddr), int16_t)
342	#define get_user_u8(x, gaddr) get_user((x), (gaddr), uint8_t)
343	#define get_user_s8(x, gaddr) get_user((x), (gaddr), int8_t)
344
345	/* copy_from_user() and copy_to_user() are usually used to copy data
346	* buffers between the target and host. These internally perform
347	* locking/unlocking of the memory.
348	*/
349	abi_long copy_from_user(void *hptr, abi_ulong gaddr, size_t len);
350	abi_long copy_to_user(abi_ulong gaddr, void *hptr, size_t len);
351
352	/* Functions for accessing guest memory. The tget and tput functions
6f20f55b	353	read/write single values, byteswapping as necessary. The lock_user function
84778508	354	gets a pointer to a contiguous area of guest memory, but does not perform
6f20f55b	355	any byteswapping. lock_user may return either a pointer to the guest
84778508 BS	356	memory, or a temporary buffer. */
	357
	358	/* Lock an area of guest memory into the host. If copy is true then the
	359	host area will have the same contents as the guest. */
	360	static inline void *lock_user(int type, abi_ulong guest_addr, long len, int copy)
	361	{
	362	if (!access_ok(type, guest_addr, len))
	363	return NULL;
	364	#ifdef DEBUG_REMAP
	365	{
	366	void *addr;
	367	addr = malloc(len);
	368	if (copy)
	369	memcpy(addr, g2h(guest_addr), len);
	370	else
	371	memset(addr, 0, len);
	372	return addr;
	373	}
	374	#else
	375	return g2h(guest_addr);
	376	#endif
	377	}
	378
	379	/* Unlock an area of guest memory. The first LEN bytes must be
	380	flushed back to guest memory. host_ptr = NULL is explicitly
	381	allowed and does nothing. */
	382	static inline void unlock_user(void *host_ptr, abi_ulong guest_addr,
	383	long len)
	384	{
	385
	386	#ifdef DEBUG_REMAP
	387	if (!host_ptr)
	388	return;
	389	if (host_ptr == g2h(guest_addr))
	390	return;
	391	if (len > 0)
	392	memcpy(g2h(guest_addr), host_ptr, len);
	393	free(host_ptr);
	394	#endif
	395	}
	396
	397	/* Return the length of a string in target memory or -TARGET_EFAULT if
	398	access error. */
	399	abi_long target_strlen(abi_ulong gaddr);
	400
	401	/* Like lock_user but for null terminated strings. */
	402	static inline void *lock_user_string(abi_ulong guest_addr)
	403	{
	404	abi_long len;
	405	len = target_strlen(guest_addr);
	406	if (len < 0)
	407	return NULL;
	408	return lock_user(VERIFY_READ, guest_addr, (long)(len + 1), 1);
	409	}
	410
41d1af4d	411	/* Helper macros for locking/unlocking a target struct. */
84778508 BS	412	#define lock_user_struct(type, host_ptr, guest_addr, copy) \
	413	(host_ptr = lock_user(type, guest_addr, sizeof(*host_ptr), copy))
	414	#define unlock_user_struct(host_ptr, guest_addr, copy) \
	415	unlock_user(host_ptr, guest_addr, (copy) ? sizeof(*host_ptr) : 0)
	416
2f7bb878	417	#if defined(CONFIG_USE_NPTL)
84778508 BS	418	#include <pthread.h>
	419	#endif
	420
	421	#endif /* QEMU_H */