include/wine/library.h

/*
 * Definitions for the Wine library
 *
 * Copyright 2000 Alexandre Julliard
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#ifndef __WINE_WINE_LIBRARY_H
#define __WINE_WINE_LIBRARY_H

#include <sys/types.h>
#include "winbase.h"

/* configuration */

extern const char *wine_get_config_dir(void);
extern const char *wine_get_server_dir(void);
extern const char *wine_get_user_name(void);

/* dll loading */

typedef void (*load_dll_callback_t)( void *, const char * );

extern void *wine_dlopen( const char *filename, int flag, char *error, int errorsize );
extern void *wine_dlsym( void *handle, const char *symbol, char *error, int errorsize );
extern int wine_dlclose( void *handle, char *error, int errorsize );
extern void wine_dll_set_callback( load_dll_callback_t load );
extern void *wine_dll_load( const char *filename, char *error, int errorsize );
extern void *wine_dll_load_main_exe( const char *name, char *error, int errorsize, int test_only );
extern void wine_dll_unload( void *handle );

extern int __wine_main_argc;
extern char **__wine_main_argv;
extern WCHAR **__wine_main_wargv;

/* debugging */

extern const char * (*__wine_dbgstr_an)( const char * s, int n );
extern const char * (*__wine_dbgstr_wn)( const WCHAR *s, int n );
extern const char * (*__wine_dbg_vsprintf)( const char *format, va_list args );
extern int (*__wine_dbg_vprintf)( const char *format, va_list args );
extern int (*__wine_dbg_vlog)( unsigned int cls, const char *channel,
                               const char *function, const char *format, va_list args );

extern void wine_dbg_add_option( const char *name, unsigned char set, unsigned char clear );
extern int wine_dbg_parse_options( const char *str );

/* portability */

extern void *wine_anon_mmap( void *start, size_t size, int prot, int flags );

/* errno support */
extern int* (*wine_errno_location)(void);
extern int* (*wine_h_errno_location)(void);

/* LDT management */

extern void wine_ldt_init_locking( void (*lock_func)(void), void (*unlock_func)(void) );
extern void wine_ldt_get_entry( unsigned short sel, LDT_ENTRY *entry );
extern int wine_ldt_set_entry( unsigned short sel, const LDT_ENTRY *entry );
extern void *wine_ldt_get_ptr( unsigned short sel, unsigned int offset );
extern unsigned short wine_ldt_alloc_entries( int count );
extern unsigned short wine_ldt_realloc_entries( unsigned short sel, int oldcount, int newcount );
extern void wine_ldt_free_entries( unsigned short sel, int count );
#ifdef __i386__
extern unsigned short wine_ldt_alloc_fs(void);
extern void wine_ldt_init_fs( unsigned short sel, const LDT_ENTRY *entry );
extern void wine_ldt_free_fs( unsigned short sel );
#else  /* __i386__ */
static inline unsigned short wine_ldt_alloc_fs(void) { return 0x0b; /* pseudo GDT selector */ }
static inline void wine_ldt_init_fs( unsigned short sel, const LDT_ENTRY *entry ) { }
static inline void wine_ldt_free_fs( unsigned short sel ) { }
#endif  /* __i386__ */


/* the local copy of the LDT */
#ifdef __CYGWIN__
# ifdef WINE_EXPORT_LDT_COPY
#  define WINE_LDT_EXTERN __declspec(dllexport)
# else
#  define WINE_LDT_EXTERN __declspec(dllimport)
# endif
#else
# define WINE_LDT_EXTERN extern
#endif

WINE_LDT_EXTERN struct __wine_ldt_copy
{
    void         *base[8192];  /* base address or 0 if entry is free   */
    unsigned long limit[8192]; /* limit in bytes or 0 if entry is free */
    unsigned char flags[8192]; /* flags (defined below) */
} wine_ldt_copy;

#define WINE_LDT_FLAGS_DATA      0x13  /* Data segment */
#define WINE_LDT_FLAGS_STACK     0x17  /* Stack segment */
#define WINE_LDT_FLAGS_CODE      0x1b  /* Code segment */
#define WINE_LDT_FLAGS_TYPE_MASK 0x1f  /* Mask for segment type */
#define WINE_LDT_FLAGS_32BIT     0x40  /* Segment is 32-bit (code or stack) */
#define WINE_LDT_FLAGS_ALLOCATED 0x80  /* Segment is allocated (no longer free) */

#define WINE_LDT_FIRST_ENTRY     17

/* helper functions to manipulate the LDT_ENTRY structure */
inline static void wine_ldt_set_base( LDT_ENTRY *ent, const void *base )
{
    ent->BaseLow               = (WORD)(unsigned long)base;
    ent->HighWord.Bits.BaseMid = (BYTE)((unsigned long)base >> 16);
    ent->HighWord.Bits.BaseHi  = (BYTE)((unsigned long)base >> 24);
}
inline static void wine_ldt_set_limit( LDT_ENTRY *ent, unsigned int limit )
{
    if ((ent->HighWord.Bits.Granularity = (limit >= 0x100000))) limit >>= 12;
    ent->LimitLow = (WORD)limit;
    ent->HighWord.Bits.LimitHi = (limit >> 16);
}
inline static void *wine_ldt_get_base( const LDT_ENTRY *ent )
{
    return (void *)(ent->BaseLow |
                    (unsigned long)ent->HighWord.Bits.BaseMid << 16 |
                    (unsigned long)ent->HighWord.Bits.BaseHi << 24);
}
inline static unsigned int wine_ldt_get_limit( const LDT_ENTRY *ent )
{
    unsigned int limit = ent->LimitLow | (ent->HighWord.Bits.LimitHi << 16);
    if (ent->HighWord.Bits.Granularity) limit = (limit << 12) | 0xfff;
    return limit;
}
inline static void wine_ldt_set_flags( LDT_ENTRY *ent, unsigned char flags )
{
    ent->HighWord.Bits.Dpl         = 3;
    ent->HighWord.Bits.Pres        = 1;
    ent->HighWord.Bits.Type        = flags;
    ent->HighWord.Bits.Sys         = 0;
    ent->HighWord.Bits.Reserved_0  = 0;
    ent->HighWord.Bits.Default_Big = (flags & WINE_LDT_FLAGS_32BIT) != 0;
}
inline static unsigned char wine_ldt_get_flags( const LDT_ENTRY *ent )
{
    unsigned char ret = ent->HighWord.Bits.Type;
    if (ent->HighWord.Bits.Default_Big) ret |= WINE_LDT_FLAGS_32BIT;
    return ret;
}
inline static int wine_ldt_is_empty( const LDT_ENTRY *ent )
{
    const DWORD *dw = (const DWORD *)ent;
    return (dw[0] | dw[1]) == 0;
}

/* segment register access */

#ifdef __i386__
# ifdef __GNUC__
#  define __DEFINE_GET_SEG(seg) \
    extern inline unsigned short wine_get_##seg(void) \
    { unsigned short res; __asm__("movw %%" #seg ",%w0" : "=r"(res)); return res; }
#  define __DEFINE_SET_SEG(seg) \
    extern inline void wine_set_##seg(int val) { __asm__("movw %w0,%%" #seg : : "r" (val)); }
# elif defined(_MSC_VER)
#  define __DEFINE_GET_SEG(seg) \
    extern inline unsigned short wine_get_##seg(void) \
    { unsigned short res; __asm { mov res, seg } return res; }
#  define __DEFINE_SET_SEG(seg) \
    extern inline void wine_set_##seg(unsigned short val) { __asm { mov seg, val } }
# else  /* __GNUC__ || _MSC_VER */
#  define __DEFINE_GET_SEG(seg) extern unsigned short wine_get_##seg(void);
#  define __DEFINE_SET_SEG(seg) extern void wine_set_##seg(unsigned int);
# endif /* __GNUC__ || _MSC_VER */
#else  /* __i386__ */
# define __DEFINE_GET_SEG(seg) inline static unsigned short wine_get_##seg(void) { return 0; }
# define __DEFINE_SET_SEG(seg) inline static void wine_set_##seg(int val) { /* nothing */ }
#endif  /* __i386__ */

__DEFINE_GET_SEG(cs)
__DEFINE_GET_SEG(ds)
__DEFINE_GET_SEG(es)
__DEFINE_GET_SEG(fs)
__DEFINE_GET_SEG(gs)
__DEFINE_GET_SEG(ss)
__DEFINE_SET_SEG(fs)
__DEFINE_SET_SEG(gs)
#undef __DEFINE_GET_SEG
#undef __DEFINE_SET_SEG

#endif  /* __WINE_WINE_LIBRARY_H */