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

#ifndef QEMU_H
#define QEMU_H

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

#include "cpu.h"

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

#include "qemu-types.h"

enum BSDType {
    target_freebsd,
    target_netbsd,
    target_openbsd,
};

#include "syscall_defs.h"
#include "syscall.h"
#include "target_signal.h"
#include "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;
    char      **host_argv;
    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 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, ...) __attribute__((format(printf,1,2)));
extern THREAD CPUState *thread_env;
void cpu_loop(CPUState *env, enum BSDType bsd_type);
char *target_strerror(int err);
int get_osversion(void);
void fork_start(void);
void fork_end(int child);

#include "qemu-log.h"

/* strace.c */
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(CPUState *cpu_env);
void signal_init(void);
//int queue_signal(CPUState *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(CPUState *env);
long do_rt_sigreturn(CPUState *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 neccessary.  The lock_user
   gets a pointer to a contiguous area of guest memory, but does not perform
   and 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/ulocking 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
84778508 BS	1	#ifndef QEMU_H
	2	#define QEMU_H
	3
	4	#include <signal.h>
	5	#include <string.h>
	6
	7	#include "cpu.h"
	8
	9	#undef DEBUG_REMAP
	10	#ifdef DEBUG_REMAP
	11	#include <stdlib.h>
	12	#endif /* DEBUG_REMAP */
	13
1609cd44	14	#include "qemu-types.h"
84778508 BS	15
	16	enum BSDType {
	17	target_freebsd,
	18	target_netbsd,
	19	target_openbsd,
	20	};
	21
	22	#include "syscall_defs.h"
	23	#include "syscall.h"
	24	#include "target_signal.h"
	25	#include "gdbstub.h"
	26
2f7bb878	27	#if defined(CONFIG_USE_NPTL)
84778508 BS	28	#define THREAD __thread
	29	#else
	30	#define THREAD
	31	#endif
	32
	33	/* This struct is used to hold certain information about the image.
	34	* Basically, it replicates in user space what would be certain
	35	* task_struct fields in the kernel
	36	*/
	37	struct image_info {
	38	abi_ulong load_addr;
	39	abi_ulong start_code;
	40	abi_ulong end_code;
	41	abi_ulong start_data;
	42	abi_ulong end_data;
	43	abi_ulong start_brk;
	44	abi_ulong brk;
	45	abi_ulong start_mmap;
	46	abi_ulong mmap;
	47	abi_ulong rss;
	48	abi_ulong start_stack;
	49	abi_ulong entry;
	50	abi_ulong code_offset;
	51	abi_ulong data_offset;
	52	char **host_argv;
	53	int personality;
	54	};
	55
	56	#define MAX_SIGQUEUE_SIZE 1024
	57
	58	struct sigqueue {
	59	struct sigqueue *next;
	60	//target_siginfo_t info;
	61	};
	62
	63	struct emulated_sigtable {
	64	int pending; /* true if signal is pending */
	65	struct sigqueue *first;
	66	struct sigqueue info; /* in order to always have memory for the
	67	first signal, we put it here */
	68	};
	69
	70	/* NOTE: we force a big alignment so that the stack stored after is
	71	aligned too */
	72	typedef struct TaskState {
	73	struct TaskState *next;
	74	int used; /* non zero if used */
	75	struct image_info *info;
	76
	77	struct emulated_sigtable sigtab[TARGET_NSIG];
	78	struct sigqueue sigqueue_table[MAX_SIGQUEUE_SIZE]; /* siginfo queue */
	79	struct sigqueue first_free; / first free siginfo queue entry */
	80	int signal_pending; /* non zero if a signal may be pending */
	81
	82	uint8_t stack[0];
	83	} __attribute__((aligned(16))) TaskState;
	84
	85	void init_task_state(TaskState *ts);
	86	extern const char *qemu_uname_release;
2fa5d9ba BS	87	#if defined(CONFIG_USE_GUEST_BASE)
	88	extern unsigned long mmap_min_addr;
	89	#endif
84778508 BS	90
	91	/* ??? See if we can avoid exposing so much of the loader internals. */
	92	/*
	93	* MAX_ARG_PAGES defines the number of pages allocated for arguments
	94	* and envelope for the new program. 32 should suffice, this gives
	95	* a maximum env+arg of 128kB w/4KB pages!
	96	*/
	97	#define MAX_ARG_PAGES 32
	98
	99	/*
	100	* This structure is used to hold the arguments that are
	101	* used when loading binaries.
	102	*/
	103	struct linux_binprm {
	104	char buf[128];
	105	void *page[MAX_ARG_PAGES];
	106	abi_ulong p;
	107	int fd;
	108	int e_uid, e_gid;
	109	int argc, envc;
	110	char **argv;
	111	char **envp;
	112	char * filename; /* Name of binary */
	113	};
	114
	115	void do_init_thread(struct target_pt_regs regs, struct image_info infop);
	116	abi_ulong loader_build_argptr(int envc, int argc, abi_ulong sp,
	117	abi_ulong stringp, int push_ptr);
	118	int loader_exec(const char * filename, char argv, char envp,
	119	struct target_pt_regs * regs, struct image_info *infop);
	120
	121	int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs,
	122	struct image_info * info);
	123	int load_flt_binary(struct linux_binprm * bprm, struct target_pt_regs * regs,
	124	struct image_info * info);
	125
	126	abi_long memcpy_to_target(abi_ulong dest, const void *src,
	127	unsigned long len);
	128	void target_set_brk(abi_ulong new_brk);
	129	abi_long do_brk(abi_ulong new_brk);
	130	void syscall_init(void);
	131	abi_long do_freebsd_syscall(void *cpu_env, int num, abi_long arg1,
	132	abi_long arg2, abi_long arg3, abi_long arg4,
	133	abi_long arg5, abi_long arg6);
	134	abi_long do_netbsd_syscall(void *cpu_env, int num, abi_long arg1,
	135	abi_long arg2, abi_long arg3, abi_long arg4,
	136	abi_long arg5, abi_long arg6);
	137	abi_long do_openbsd_syscall(void *cpu_env, int num, abi_long arg1,
	138	abi_long arg2, abi_long arg3, abi_long arg4,
	139	abi_long arg5, abi_long arg6);
	140	void gemu_log(const char *fmt, ...) __attribute__((format(printf,1,2)));
	141	extern THREAD CPUState *thread_env;
	142	void cpu_loop(CPUState *env, enum BSDType bsd_type);
84778508 BS	143	char *target_strerror(int err);
	144	int get_osversion(void);
	145	void fork_start(void);
	146	void fork_end(int child);
	147
	148	#include "qemu-log.h"
	149
	150	/* strace.c */
	151	void
	152	print_freebsd_syscall(int num,
	153	abi_long arg1, abi_long arg2, abi_long arg3,
	154	abi_long arg4, abi_long arg5, abi_long arg6);
	155	void print_freebsd_syscall_ret(int num, abi_long ret);
	156	void
	157	print_netbsd_syscall(int num,
	158	abi_long arg1, abi_long arg2, abi_long arg3,
	159	abi_long arg4, abi_long arg5, abi_long arg6);
	160	void print_netbsd_syscall_ret(int num, abi_long ret);
	161	void
	162	print_openbsd_syscall(int num,
	163	abi_long arg1, abi_long arg2, abi_long arg3,
	164	abi_long arg4, abi_long arg5, abi_long arg6);
	165	void print_openbsd_syscall_ret(int num, abi_long ret);
	166	extern int do_strace;
	167
	168	/* signal.c */
	169	void process_pending_signals(CPUState *cpu_env);
	170	void signal_init(void);
	171	//int queue_signal(CPUState env, int sig, target_siginfo_t info);
	172	//void host_to_target_siginfo(target_siginfo_t tinfo, const siginfo_t info);
	173	//void target_to_host_siginfo(siginfo_t info, const target_siginfo_t tinfo);
	174	long do_sigreturn(CPUState *env);
	175	long do_rt_sigreturn(CPUState *env);
	176	abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr, abi_ulong sp);
	177
	178	/* mmap.c */
	179	int target_mprotect(abi_ulong start, abi_ulong len, int prot);
	180	abi_long target_mmap(abi_ulong start, abi_ulong len, int prot,
	181	int flags, int fd, abi_ulong offset);
	182	int target_munmap(abi_ulong start, abi_ulong len);
	183	abi_long target_mremap(abi_ulong old_addr, abi_ulong old_size,
	184	abi_ulong new_size, unsigned long flags,
	185	abi_ulong new_addr);
	186	int target_msync(abi_ulong start, abi_ulong len, int flags);
	187	extern unsigned long last_brk;
	188	void mmap_lock(void);
	189	void mmap_unlock(void);
9399f095 BS	190	void cpu_list_lock(void);
9399f095 BS	191	void cpu_list_unlock(void);
2f7bb878	192	#if defined(CONFIG_USE_NPTL)
84778508 BS	193	void mmap_fork_start(void);
	194	void mmap_fork_end(int child);
	195	#endif
	196
28e738dc BS	197	/* main.c */
	198	extern unsigned long x86_stack_size;
	199
84778508 BS	200	/* user access */
	201
	202	#define VERIFY_READ 0
	203	#define VERIFY_WRITE 1 /* implies read access */
	204
	205	static inline int access_ok(int type, abi_ulong addr, abi_ulong size)
	206	{
	207	return page_check_range((target_ulong)addr, size,
	208	(type == VERIFY_READ) ? PAGE_READ : (PAGE_READ \| PAGE_WRITE)) == 0;
	209	}
	210
	211	/* NOTE __get_user and __put_user use host pointers and don't check access. */
	212	/* These are usually used to access struct data members once the
	213	* struct has been locked - usually with lock_user_struct().
	214	*/
	215	#define __put_user(x, hptr)\
	216	({\
	217	int size = sizeof(*hptr);\
	218	switch(size) {\
	219	case 1:\
	220	(uint8_t )(hptr) = (uint8_t)(typeof(*hptr))(x);\
	221	break;\
	222	case 2:\
	223	(uint16_t )(hptr) = tswap16((typeof(*hptr))(x));\
	224	break;\
	225	case 4:\
	226	(uint32_t )(hptr) = tswap32((typeof(*hptr))(x));\
	227	break;\
	228	case 8:\
	229	(uint64_t )(hptr) = tswap64((typeof(*hptr))(x));\
	230	break;\
	231	default:\
	232	abort();\
	233	}\
	234	0;\
	235	})
	236
	237	#define __get_user(x, hptr) \
	238	({\
	239	int size = sizeof(*hptr);\
	240	switch(size) {\
	241	case 1:\
	242	x = (typeof(hptr))(uint8_t *)(hptr);\
	243	break;\
	244	case 2:\
	245	x = (typeof(hptr))tswap16((uint16_t *)(hptr));\
	246	break;\
	247	case 4:\
	248	x = (typeof(hptr))tswap32((uint32_t *)(hptr));\
	249	break;\
	250	case 8:\
	251	x = (typeof(hptr))tswap64((uint64_t *)(hptr));\
	252	break;\
	253	default:\
	254	/* avoid warning */\
	255	x = 0;\
	256	abort();\
	257	}\
	258	0;\
	259	})
	260
	261	/* put_user()/get_user() take a guest address and check access */
	262	/* These are usually used to access an atomic data type, such as an int,
	263	* that has been passed by address. These internally perform locking
264	* and unlocking on the data type.
265	*/
266	#define put_user(x, gaddr, target_type) \
267	({ \
268	abi_ulong __gaddr = (gaddr); \
269	target_type *__hptr; \
270	abi_long __ret; \
271	if ((__hptr = lock_user(VERIFY_WRITE, __gaddr, sizeof(target_type), 0))) { \
272	__ret = __put_user((x), __hptr); \
273	unlock_user(__hptr, __gaddr, sizeof(target_type)); \
274	} else \
275	__ret = -TARGET_EFAULT; \
276	__ret; \
277	})
278
279	#define get_user(x, gaddr, target_type) \
280	({ \
281	abi_ulong __gaddr = (gaddr); \
282	target_type *__hptr; \
283	abi_long __ret; \
284	if ((__hptr = lock_user(VERIFY_READ, __gaddr, sizeof(target_type), 1))) { \
285	__ret = __get_user((x), __hptr); \
286	unlock_user(__hptr, __gaddr, 0); \
287	} else { \
288	/* avoid warning */ \
289	(x) = 0; \
290	__ret = -TARGET_EFAULT; \
291	} \
292	__ret; \
293	})
294
295	#define put_user_ual(x, gaddr) put_user((x), (gaddr), abi_ulong)
296	#define put_user_sal(x, gaddr) put_user((x), (gaddr), abi_long)
297	#define put_user_u64(x, gaddr) put_user((x), (gaddr), uint64_t)
298	#define put_user_s64(x, gaddr) put_user((x), (gaddr), int64_t)
299	#define put_user_u32(x, gaddr) put_user((x), (gaddr), uint32_t)
300	#define put_user_s32(x, gaddr) put_user((x), (gaddr), int32_t)
301	#define put_user_u16(x, gaddr) put_user((x), (gaddr), uint16_t)
302	#define put_user_s16(x, gaddr) put_user((x), (gaddr), int16_t)
303	#define put_user_u8(x, gaddr) put_user((x), (gaddr), uint8_t)
304	#define put_user_s8(x, gaddr) put_user((x), (gaddr), int8_t)
305
306	#define get_user_ual(x, gaddr) get_user((x), (gaddr), abi_ulong)
307	#define get_user_sal(x, gaddr) get_user((x), (gaddr), abi_long)
308	#define get_user_u64(x, gaddr) get_user((x), (gaddr), uint64_t)
309	#define get_user_s64(x, gaddr) get_user((x), (gaddr), int64_t)
310	#define get_user_u32(x, gaddr) get_user((x), (gaddr), uint32_t)
311	#define get_user_s32(x, gaddr) get_user((x), (gaddr), int32_t)
312	#define get_user_u16(x, gaddr) get_user((x), (gaddr), uint16_t)
313	#define get_user_s16(x, gaddr) get_user((x), (gaddr), int16_t)
314	#define get_user_u8(x, gaddr) get_user((x), (gaddr), uint8_t)
315	#define get_user_s8(x, gaddr) get_user((x), (gaddr), int8_t)
316
317	/* copy_from_user() and copy_to_user() are usually used to copy data
318	* buffers between the target and host. These internally perform
319	* locking/unlocking of the memory.
320	*/
321	abi_long copy_from_user(void *hptr, abi_ulong gaddr, size_t len);
322	abi_long copy_to_user(abi_ulong gaddr, void *hptr, size_t len);
323
324	/* Functions for accessing guest memory. The tget and tput functions
325	read/write single values, byteswapping as neccessary. The lock_user
326	gets a pointer to a contiguous area of guest memory, but does not perform
327	and byteswapping. lock_user may return either a pointer to the guest
328	memory, or a temporary buffer. */
329
330	/* Lock an area of guest memory into the host. If copy is true then the
331	host area will have the same contents as the guest. */
332	static inline void *lock_user(int type, abi_ulong guest_addr, long len, int copy)
333	{
334	if (!access_ok(type, guest_addr, len))
335	return NULL;
336	#ifdef DEBUG_REMAP
337	{
338	void *addr;
339	addr = malloc(len);
340	if (copy)
341	memcpy(addr, g2h(guest_addr), len);
342	else
343	memset(addr, 0, len);
344	return addr;
345	}
346	#else
347	return g2h(guest_addr);
348	#endif
349	}
350
351	/* Unlock an area of guest memory. The first LEN bytes must be
352	flushed back to guest memory. host_ptr = NULL is explicitly
353	allowed and does nothing. */
354	static inline void unlock_user(void *host_ptr, abi_ulong guest_addr,
355	long len)
356	{
357
358	#ifdef DEBUG_REMAP
359	if (!host_ptr)
360	return;
361	if (host_ptr == g2h(guest_addr))
362	return;
363	if (len > 0)
364	memcpy(g2h(guest_addr), host_ptr, len);
365	free(host_ptr);
366	#endif
367	}
368
369	/* Return the length of a string in target memory or -TARGET_EFAULT if
370	access error. */
371	abi_long target_strlen(abi_ulong gaddr);
372
373	/* Like lock_user but for null terminated strings. */
374	static inline void *lock_user_string(abi_ulong guest_addr)
375	{
376	abi_long len;
377	len = target_strlen(guest_addr);
378	if (len < 0)
379	return NULL;
380	return lock_user(VERIFY_READ, guest_addr, (long)(len + 1), 1);
381	}
382
383	/* Helper macros for locking/ulocking a target struct. */
384	#define lock_user_struct(type, host_ptr, guest_addr, copy) \
385	(host_ptr = lock_user(type, guest_addr, sizeof(*host_ptr), copy))
386	#define unlock_user_struct(host_ptr, guest_addr, copy) \
387	unlock_user(host_ptr, guest_addr, (copy) ? sizeof(*host_ptr) : 0)
388
2f7bb878	389	#if defined(CONFIG_USE_NPTL)
84778508 BS	390	#include <pthread.h>
	391	#endif
	392
	393	#endif /* QEMU_H */