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Rev 164 Rev 168
1 
reg_eip       equ ebp+4
 1 
reg_eip       equ ebp+4
2 
reg_cs        equ ebp+8
 2 
reg_cs        equ ebp+8
3 
reg_eflags    equ ebp+12
 3 
reg_eflags    equ ebp+12
4 
reg_esp       equ ebp+16
 4 
reg_esp       equ ebp+16
5 
reg_ss        equ ebp+20
 5 
reg_ss        equ ebp+20
6 
fpu_ctrl      equ ebp-28
 6 
;fpu_ctrl      equ ebp-28
7 
 
 7 
 
8 
align 4
 8 
align 4
9 
except_16:
 9 
except_16:
10 
           push ebp
 10 
           push ebp
11 
           mov ebp, esp
 11 
           mov ebp, esp
12 
           sub esp, 28
 12 
;           sub esp, 28
13 
 
 13 
 
14 
           push eax
 14 
           push eax
15 
           push ebx
 15 
           push ebx
16 
           push ecx
 16 
           push ecx
17 
           push edx
 17 
           push edx
18 
 
 18 
 
19 
           mov ebx, [ss:CURRENT_TASK]
 19 
           mov ebx, [ss:CURRENT_TASK]
20 
           shl ebx, 8
 20 
           shl ebx, 8
21 
 
 21 
 
22 
           mov eax, [ss:ebx+PROC_BASE+APPDATA.fpu_handler]
 22 
           mov eax, [ss:ebx+PROC_BASE+APPDATA.fpu_handler]
23 
           test eax, eax
 23 
           test eax, eax
24 
           jz .default
 24 
           jz .default
25 
 
 25 
 
26 
           mov ecx, [reg_eip]
 26 
           mov ecx, [reg_eip]
27 
           mov edx, [reg_esp]
 27 
           mov edx, [reg_esp]
28 
           sub edx, 4
 28 
           sub edx, 4
29 
           mov [ss:edx+new_app_base], ecx
 29 
           mov [ss:edx+new_app_base], ecx
30 
           mov [reg_esp], edx
 30 
           mov [reg_esp], edx
31 
           mov dword [reg_eip], eax
 31 
           mov dword [reg_eip], eax
32 
 
 32 
 
33 
           pop edx
 33 
           pop edx
34 
           pop ecx
 34 
           pop ecx
35 
           pop ebx
 35 
           pop ebx
36 
           pop eax
 36 
           pop eax
37 
 
 37 
 
38 
           leave
 38 
           leave
39 
           iretd
 39 
           iretd
40 
 
 40 
 
41 
.default:
 41 
.default:
42 
 
 42 
           pop edx
43 
           fnstenv [fpu_ctrl]
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           pop ecx
- 
 
 44 
           pop ebx
- 
 
 45 
           pop eax
- 
 
 46 
           leave
- 
 
 47 
 
- 
 
 48 
           save_ring3_context     ;debugger support
- 
 
 49 
 
- 
 
 50 
           mov bl, 16
- 
 
 51 
           jmp exc_c
- 
 
 52 
 
- 
 
 53 
;           fnstenv [fpu_ctrl]
44 
           fnclex
 54 
;           fnclex
45 
           or word [fpu_ctrl], 0111111b
 55 
;           or word [fpu_ctrl], 0111111b
46 
           fldenv [fpu_ctrl]
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;           fldenv [fpu_ctrl]
47 
 
 57 
 
- 
 
 58 
;          pop edx
- 
 
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;          pop ecx
- 
 
 60 
;          pop ebx
- 
 
 61 
;          pop eax
- 
 
 62 
 
- 
 
 63 
;           leave
- 
 
 64 
;           iretd
- 
 
 65 
 
- 
 
 66 
align 16
- 
 
 67 
except_19:
- 
 
 68 
           push ebp
- 
 
 69 
           mov ebp, esp
- 
 
 70 
 
- 
 
 71 
           push eax
- 
 
 72 
           push ebx
- 
 
 73 
           push ecx
- 
 
 74 
           push edx
- 
 
 75 
 
- 
 
 76 
           mov ebx, [ss:CURRENT_TASK]
- 
 
 77 
           shl ebx, 8
- 
 
 78 
 
- 
 
 79 
           mov eax, [ss:ebx+PROC_BASE+APPDATA.sse_handler]
- 
 
 80 
           test eax, eax
- 
 
 81 
           jz .default
- 
 
 82 
 
- 
 
 83 
           mov ecx, [reg_eip]
- 
 
 84 
           mov edx, [reg_esp]
- 
 
 85 
           sub edx, 4
- 
 
 86 
           mov [ss:edx+new_app_base], ecx
- 
 
 87 
           mov [reg_esp], edx
- 
 
 88 
           mov dword [reg_eip], eax
- 
 
 89 
 
48 
           pop edx
 90 
           pop edx
49 
           pop ecx
 91 
           pop ecx
50 
           pop ebx
 92 
           pop ebx
51 
           pop eax
 93 
           pop eax
52 
 
 94 
 
53 
           leave
 95 
           leave
54 
           iretd
 96 
           iretd
55 
 
 97 
 
56 
 
 98 
.default:
- 
 
 99 
           pop edx
- 
 
 100 
           pop ecx
- 
 
 101 
           pop ebx
- 
 
 102 
           pop eax
- 
 
 103 
           leave
- 
 
 104 
 
- 
 
 105 
           save_ring3_context     ;debugger support
- 
 
 106 
 
- 
 
 107 
           mov bl, 19
- 
 
 108 
           jmp exc_c
- 
 
 109 
 
57 
restore reg_eip
 110 
restore reg_eip
58 
restore reg_cs
 111 
restore reg_cs
59 
restore reg_eflags
 112 
restore reg_eflags
60 
restore reg_esp
 113 
restore reg_esp
61 
restore reg_ss
 114 
restore reg_ss
62 
restore fpu_ctrl
 115 
;restore fpu_ctrl
63 

            116
            

          

          

            64
            

            117