1
2
3
4
5
6
7
8
9
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_DS (*(unsigned short *) &(FPU_info->___ds))
27 #define FPU_EAX (FPU_info->___eax)
28 #define FPU_EFLAGS (FPU_info->___eflags)
29 #define FPU_EIP (FPU_info->___eip)
30 #define FPU_ORIG_EIP (FPU_info->___orig_eip)
31
32 #define FPU_lookahead (I387.soft.lookahead)
33 #define FPU_entry_eip (I387.soft.entry_eip)
34
35 #define partial_status (I387.soft.swd)
36 #define control_word (I387.soft.cwd)
37 #define regs (I387.soft.regs)
38 #define top (I387.soft.top)
39
40 #define ip_offset (I387.soft.fip)
41 #define cs_selector (I387.soft.fcs)
42 #define data_operand_offset (I387.soft.foo)
43 #define operand_selector (I387.soft.fos)
44
45 #define FPU_verify_area(x,y,z) if ( verify_area(x,y,z) ) \
46 math_abort(FPU_info,SIGSEGV)
47
48 #undef FPU_IGNORE_CODE_SEGV
49 #ifdef FPU_IGNORE_CODE_SEGV
50
51
52
53
54 #define FPU_code_verify_area(z)
55 #else
56
57
58
59 #define FPU_code_verify_area(z) FPU_verify_area(VERIFY_READ,(void *)FPU_EIP,z)
60 #endif
61
62
63 #define FPU_data_address ((void *)(I387.soft.twd))
64
65 #endif