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10 #ifndef _FPU_SYSTEM_H
11 #define _FPU_SYSTEM_H
12
13
14
15 #include <linux/sched.h>
16 #include <linux/kernel.h>
17
18
19
20 #define SETUP_DATA_AREA(arg) FPU_info = (struct info *) &arg
21
22 #define I387 (current->tss.i387)
23 #define FPU_info (I387.soft.info)
24
25 #define FPU_CS (*(unsigned short *) &(FPU_info->___cs))
26 #define FPU_SS (*(unsigned short *) &(FPU_info->___ss))
27 #define FPU_DS (*(unsigned short *) &(FPU_info->___ds))
28 #define FPU_EAX (FPU_info->___eax)
29 #define FPU_EFLAGS (FPU_info->___eflags)
30 #define FPU_EIP (FPU_info->___eip)
31 #define FPU_ORIG_EIP (FPU_info->___orig_eip)
32
33 #define LDT_BASE_ADDR(s) ((current->ldt[(s) >> 3].b & 0xff000000) \
34 | ((current->ldt[(s) >> 3].b & 0xff) << 16) \
35 | (current->ldt[(s) >> 3].a >> 16))
36
37 #define FPU_lookahead (I387.soft.lookahead)
38 #define FPU_entry_eip (I387.soft.entry_eip)
39
40 #define partial_status (I387.soft.swd)
41 #define control_word (I387.soft.cwd)
42 #define regs (I387.soft.regs)
43 #define top (I387.soft.top)
44
45 #define ip_offset (I387.soft.fip)
46 #define cs_selector (I387.soft.fcs)
47 #define data_operand_offset (I387.soft.foo)
48 #define operand_selector (I387.soft.fos)
49
50 #define FPU_verify_area(x,y,z) if ( verify_area(x,y,z) ) \
51 math_abort(FPU_info,SIGSEGV)
52
53 #undef FPU_IGNORE_CODE_SEGV
54 #ifdef FPU_IGNORE_CODE_SEGV
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56
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58
59 #define FPU_code_verify_area(z)
60 #else
61
62
63
64 #define FPU_code_verify_area(z) FPU_verify_area(VERIFY_READ,(void *)FPU_EIP,z)
65 #endif
66
67
68 #define FPU_data_address ((void *)(I387.soft.twd))
69
70 #endif