source: trunk/src/odinprof/profasm.asm@ 10367

Last change on this file since 10367 was 7421, checked in by phaller, 24 years ago

Added ODIN profiler employing the VAC308 generated profiler hooks
File size: 3.3 KB
Line 
1; $Id: profasm.asm,v 1.1 2001-11-22 10:43:59 phaller Exp $
2
3;/*
4; * Project Odin Software License can be found in LICENSE.TXT
5; * Execution Trace Profiler
6; *
7; * Copyright 2001 Patrick Haller <patrick.haller@innotek.de>
8; *
9; */
10
11.586p
12 NAME profasm
13
14extrn C_ProfileHook32Enter: proc
15extrn C_ProfileHook32Exit: proc
16
17CODE32 SEGMENT DWORD PUBLIC USE32 'CODE'
18 ASSUME DS:FLAT, SS:FLAT
19
20 public odin_ProfileHook32
21odin_ProfileHook32 proc near
22
23 ; --------
24 ; top half
25 ; --------
26
27 pushfd
28 push eax ; save altered registers
29 push edx
30 push ecx
31
32 rdtsc ; push the machine timestamp
33 ; (assuming at least Pentium CPU is available)
34 push eax
35 push edx
36 mov edx, dword ptr [esp+1Ch]
37 push edx ; push return address for bottom half
38 mov edx, dword ptr [esp+1Ch]
39 push edx ; push entry address of caller function
40
41 ; ret_addr _System C_ProfilerHook32Enter(ULONG eip_function, ULONG ret, ULONGLONG tsc)
42 call C_ProfileHook32Enter
43 add esp, 10h
44
45 ; restore the stack as it was before
46 ; and replace the (saved) caller's address by the
47 ; hook's bottom half address
48 mov dword ptr [esp + 14h], eax
49
50 pop ecx
51 pop edx
52 pop eax
53 popfd
54
55 ret
56odin_ProfileHook32 endp
57
58
59 public odin_ProfileHook32Bottom
60odin_ProfileHook32Bottom proc near
61
62 ; -----------
63 ; bottom half
64 ; -----------
65
66 push 0 ; make room for virtual jump
67
68 pushfd
69 push eax ; save altered registers
70 push edx
71 push ecx
72
73 rdtsc ; push the machine timestamp
74 ; (assuming at least Pentium CPU is available)
75 push eax
76 push edx
77
78 ; ret_addr _System C_ProfilerHook32Exit(ULONGLONG tsc)
79 call C_ProfileHook32Exit
80 add esp, 08h
81
82 ; restore the stack as it was before
83 ; and virtually JUMP BACK to the caller's caller
84 ; eax now contains the return address
85 mov dword ptr [esp + 10h], eax
86
87 pop ecx
88 pop edx ; restore altered registers
89 pop eax
90 popfd
91
92 ; this is a virtual jump!
93 ret
94odin_ProfileHook32Bottom endp
95
96 public _ProfileGetTimestamp
97_ProfileGetTimestamp proc near
98
99 push eax ; save altered registers
100 push edx
101 push edi
102
103 rdtsc ; push the machine timestamp
104 ; (assuming at least Pentium CPU is available)
105 mov edi, dword ptr [esp+14h]
106 mov dword ptr [edi], eax
107 mov edi, dword ptr [esp+10h]
108 mov dword ptr [edi], edx
109
110 pop edi
111 pop edx
112 pop eax
113
114 ret
115_ProfileGetTimestamp endp
116
117
118CODE32 ENDS
119 END
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