mirror of
https://github.com/mpv-player/mpv
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0864f92e7a
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@28085 b3059339-0415-0410-9bf9-f77b7e298cf2
100 lines
3.4 KiB
C
100 lines
3.4 KiB
C
/*
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* LDT copy
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*
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* Copyright 1995 Alexandre Julliard
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*/
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#ifndef MPLAYER_LDT_H
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#define MPLAYER_LDT_H
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#include "windef.h"
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enum seg_type
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{
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SEGMENT_DATA = 0,
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SEGMENT_STACK = 1,
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SEGMENT_CODE = 2
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};
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/* This structure represents a real LDT entry. */
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/* It is used by get_ldt_entry() and set_ldt_entry(). */
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typedef struct
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{
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unsigned long base; /* base address */
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unsigned long limit; /* segment limit (in pages or bytes) */
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int seg_32bit; /* is segment 32-bit? */
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int read_only; /* is segment read-only? */
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int limit_in_pages; /* is the limit in pages or bytes? */
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enum seg_type type; /* segment type */
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} ldt_entry;
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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void LDT_BytesToEntry( const unsigned long *buffer, ldt_entry *content );
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void LDT_EntryToBytes( unsigned long *buffer, const ldt_entry *content );
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int LDT_GetEntry( int entry, ldt_entry *content );
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int LDT_SetEntry( int entry, const ldt_entry *content );
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void LDT_Print( int start, int length );
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/* This structure is used to build the local copy of the LDT. */
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typedef struct
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{
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unsigned long base; /* base address or 0 if entry is free */
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unsigned long limit; /* limit in bytes or 0 if entry is free */
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} ldt_copy_entry;
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#define LDT_SIZE 8192
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extern ldt_copy_entry ldt_copy[LDT_SIZE];
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#define AHSHIFT 3 /* don't change! */
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#define AHINCR (1 << AHSHIFT)
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#define SELECTOR_TO_ENTRY(sel) (((int)(sel) & 0xffff) >> AHSHIFT)
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#define ENTRY_TO_SELECTOR(i) ((i) ? (((int)(i) << AHSHIFT) | 7) : 0)
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#define IS_LDT_ENTRY_FREE(i) (!(ldt_flags_copy[(i)] & LDT_FLAGS_ALLOCATED))
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#define IS_SELECTOR_FREE(sel) (IS_LDT_ENTRY_FREE(SELECTOR_TO_ENTRY(sel)))
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#define GET_SEL_BASE(sel) (ldt_copy[SELECTOR_TO_ENTRY(sel)].base)
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#define GET_SEL_LIMIT(sel) (ldt_copy[SELECTOR_TO_ENTRY(sel)].limit)
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/* Convert a segmented ptr (16:16) to a linear (32) pointer */
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#define PTR_SEG_OFF_TO_LIN(seg,off) \
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((void*)(GET_SEL_BASE(seg) + (unsigned int)(off)))
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#define PTR_SEG_TO_LIN(ptr) \
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PTR_SEG_OFF_TO_LIN(SELECTOROF(ptr),OFFSETOF(ptr))
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#define PTR_SEG_OFF_TO_SEGPTR(seg,off) \
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((SEGPTR)MAKELONG(off,seg))
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#define PTR_SEG_OFF_TO_HUGEPTR(seg,off) \
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PTR_SEG_OFF_TO_SEGPTR( (seg) + (HIWORD(off) << AHSHIFT), LOWORD(off) )
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#define W32S_APPLICATION() (PROCESS_Current()->flags & PDB32_WIN32S_PROC)
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#define W32S_OFFSET 0x10000
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#define W32S_APP2WINE(addr, offset) ((addr)? (DWORD)(addr) + (DWORD)(offset) : 0)
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#define W32S_WINE2APP(addr, offset) ((addr)? (DWORD)(addr) - (DWORD)(offset) : 0)
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extern unsigned char ldt_flags_copy[LDT_SIZE];
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#define LDT_FLAGS_TYPE 0x03 /* Mask for segment type */
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#define LDT_FLAGS_READONLY 0x04 /* Segment is read-only (data) */
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#define LDT_FLAGS_EXECONLY 0x04 /* Segment is execute-only (code) */
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#define LDT_FLAGS_32BIT 0x08 /* Segment is 32-bit (code or stack) */
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#define LDT_FLAGS_BIG 0x10 /* Segment is big (limit is in pages) */
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#define LDT_FLAGS_ALLOCATED 0x80 /* Segment is allocated (no longer free) */
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#define GET_SEL_FLAGS(sel) (ldt_flags_copy[SELECTOR_TO_ENTRY(sel)])
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#define FIRST_LDT_ENTRY_TO_ALLOC 17
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/* Determine if sel is a system selector (i.e. not managed by Wine) */
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#define IS_SELECTOR_SYSTEM(sel) \
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(!((sel) & 4) || (SELECTOR_TO_ENTRY(sel) < FIRST_LDT_ENTRY_TO_ALLOC))
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#define IS_SELECTOR_32BIT(sel) \
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(IS_SELECTOR_SYSTEM(sel) || (GET_SEL_FLAGS(sel) & LDT_FLAGS_32BIT))
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#ifdef __cplusplus
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}
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#endif
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#endif /* MPLAYER_LDT_H */
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