Commit | Line | Data |
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e2abbb1b AJ |
1 | /* |
2 | * LDT copy | |
3 | * | |
4 | * Copyright 1995 Alexandre Julliard | |
5 | */ | |
6 | ||
ac9c9b07 AJ |
7 | #ifndef __WINE_LDT_H |
8 | #define __WINE_LDT_H | |
9 | ||
2e1cafa2 | 10 | #include "windef.h" |
e2abbb1b AJ |
11 | |
12 | enum seg_type | |
13 | { | |
14 | SEGMENT_DATA = 0, | |
15 | SEGMENT_STACK = 1, | |
16 | SEGMENT_CODE = 2 | |
17 | }; | |
18 | ||
19 | /* This structure represents a real LDT entry. */ | |
20 | /* It is used by get_ldt_entry() and set_ldt_entry(). */ | |
21 | typedef struct | |
22 | { | |
23 | unsigned long base; /* base address */ | |
18f92e76 | 24 | unsigned long limit; /* segment limit (in pages or bytes) */ |
e2abbb1b AJ |
25 | int seg_32bit; /* is segment 32-bit? */ |
26 | int read_only; /* is segment read-only? */ | |
27 | int limit_in_pages; /* is the limit in pages or bytes? */ | |
28 | enum seg_type type; /* segment type */ | |
29 | } ldt_entry; | |
30 | ||
bd34d4ff AJ |
31 | extern void LDT_BytesToEntry( const unsigned long *buffer, ldt_entry *content); |
32 | extern void LDT_EntryToBytes( unsigned long *buffer, const ldt_entry *content); | |
e2abbb1b | 33 | extern int LDT_GetEntry( int entry, ldt_entry *content ); |
bd34d4ff | 34 | extern int LDT_SetEntry( int entry, const ldt_entry *content ); |
af0bae58 | 35 | extern void LDT_Print( int start, int length ); |
e2abbb1b AJ |
36 | |
37 | ||
38 | /* This structure is used to build the local copy of the LDT. */ | |
39 | typedef struct | |
40 | { | |
41 | unsigned long base; /* base address or 0 if entry is free */ | |
42 | unsigned long limit; /* limit in bytes or 0 if entry is free */ | |
43 | } ldt_copy_entry; | |
44 | ||
45 | #define LDT_SIZE 8192 | |
46 | ||
47 | extern ldt_copy_entry ldt_copy[LDT_SIZE]; | |
48 | ||
e2991ea7 | 49 | #define __AHSHIFT 3 /* don't change! */ |
e2abbb1b AJ |
50 | #define __AHINCR (1 << __AHSHIFT) |
51 | ||
2787be87 | 52 | #define SELECTOR_TO_ENTRY(sel) (((int)(sel) & 0xffff) >> __AHSHIFT) |
e2abbb1b | 53 | #define ENTRY_TO_SELECTOR(i) ((i) ? (((int)(i) << __AHSHIFT) | 7) : 0) |
e2991ea7 | 54 | #define IS_LDT_ENTRY_FREE(i) (!(ldt_flags_copy[(i)] & LDT_FLAGS_ALLOCATED)) |
e2abbb1b AJ |
55 | #define IS_SELECTOR_FREE(sel) (IS_LDT_ENTRY_FREE(SELECTOR_TO_ENTRY(sel))) |
56 | #define GET_SEL_BASE(sel) (ldt_copy[SELECTOR_TO_ENTRY(sel)].base) | |
57 | #define GET_SEL_LIMIT(sel) (ldt_copy[SELECTOR_TO_ENTRY(sel)].limit) | |
e2abbb1b | 58 | |
ac9c9b07 | 59 | /* Convert a segmented ptr (16:16) to a linear (32) pointer */ |
1285c2f9 | 60 | |
ac9c9b07 | 61 | #define PTR_SEG_OFF_TO_LIN(seg,off) \ |
46ea8b3f | 62 | ((void*)(GET_SEL_BASE(seg) + (unsigned int)(off))) |
ac9c9b07 | 63 | #define PTR_SEG_TO_LIN(ptr) \ |
46ea8b3f | 64 | PTR_SEG_OFF_TO_LIN(SELECTOROF(ptr),OFFSETOF(ptr)) |
ac9c9b07 | 65 | #define PTR_SEG_OFF_TO_SEGPTR(seg,off) \ |
46ea8b3f | 66 | ((SEGPTR)MAKELONG(off,seg)) |
03468f7d | 67 | #define PTR_SEG_OFF_TO_HUGEPTR(seg,off) \ |
46ea8b3f | 68 | PTR_SEG_OFF_TO_SEGPTR( (seg) + (HIWORD(off) << __AHSHIFT), LOWORD(off) ) |
bd34d4ff | 69 | |
a00b49f0 AM |
70 | #define W32S_APPLICATION() (PROCESS_Current()->flags & PDB32_WIN32S_PROC) |
71 | #define W32S_OFFSET 0x10000 | |
72 | #define W32S_APP2WINE(addr, offset) ((addr)? (DWORD)(addr) + (DWORD)(offset) : 0) | |
73 | #define W32S_WINE2APP(addr, offset) ((addr)? (DWORD)(addr) - (DWORD)(offset) : 0) | |
74 | ||
bd34d4ff AJ |
75 | extern unsigned char ldt_flags_copy[LDT_SIZE]; |
76 | ||
77 | #define LDT_FLAGS_TYPE 0x03 /* Mask for segment type */ | |
78 | #define LDT_FLAGS_READONLY 0x04 /* Segment is read-only (data) */ | |
79 | #define LDT_FLAGS_EXECONLY 0x04 /* Segment is execute-only (code) */ | |
80 | #define LDT_FLAGS_32BIT 0x08 /* Segment is 32-bit (code or stack) */ | |
81 | #define LDT_FLAGS_BIG 0x10 /* Segment is big (limit is in pages) */ | |
e2991ea7 | 82 | #define LDT_FLAGS_ALLOCATED 0x80 /* Segment is allocated (no longer free) */ |
bd34d4ff AJ |
83 | |
84 | #define GET_SEL_FLAGS(sel) (ldt_flags_copy[SELECTOR_TO_ENTRY(sel)]) | |
e2abbb1b | 85 | |
46ea8b3f AJ |
86 | #define FIRST_LDT_ENTRY_TO_ALLOC 17 |
87 | ||
88 | /* Determine if sel is a system selector (i.e. not managed by Wine) */ | |
89 | #define IS_SELECTOR_SYSTEM(sel) \ | |
90 | (!((sel) & 4) || (SELECTOR_TO_ENTRY(sel) < FIRST_LDT_ENTRY_TO_ALLOC)) | |
91 | #define IS_SELECTOR_32BIT(sel) \ | |
92 | (IS_SELECTOR_SYSTEM(sel) || (GET_SEL_FLAGS(sel) & LDT_FLAGS_32BIT)) | |
93 | ||
ac9c9b07 | 94 | #endif /* __WINE_LDT_H */ |