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