diff options
Diffstat (limited to 'loader/wine/ldt.h')
-rw-r--r-- | loader/wine/ldt.h | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/loader/wine/ldt.h b/loader/wine/ldt.h new file mode 100644 index 0000000000..f87ecc14e2 --- /dev/null +++ b/loader/wine/ldt.h @@ -0,0 +1,98 @@ +/* + * 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; +#ifdef __cplusplus +extern "C" +{ +#endif +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_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)) +#ifdef __cplusplus +} +#endif +#endif /* __WINE_LDT_H */ |