1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
|
/****************************************************************
* *
* Copyright 2001, 2012 Fidelity Information Services, Inc *
* *
* This source code contains the intellectual property *
* of its copyright holder(s), and is made available *
* under a license. If you do not know the terms of *
* the license, please stop and do not read further. *
* *
****************************************************************/
#include "mdef.h"
#include "xfer_enum.h"
#include "i386.h"
#include <rtnhdr.h> /* Needed by zbreak.h */
#include "zbreak.h"
zb_code *find_line_call(void *addr)
{
unsigned char *call_addr;
union
{
ModR_M modrm;
unsigned char byte;
} modrm_byte;
call_addr = (unsigned char *)addr;
modrm_byte.byte = *(call_addr + 1);
if ((I386_INS_Grp5_Prefix == *call_addr) && (I386_INS_CALL_Ev == modrm_byte.modrm.reg_opcode))
{
call_addr++;
assert(I386_REG_EBX == modrm_byte.modrm.r_m);
call_addr++;
if (I386_MOD32_BASE_DISP_8 == modrm_byte.modrm.mod)
{
if ((xf_linestart * SIZEOF(int4) == *call_addr) ||
(xf_zbstart * SIZEOF(int4) == *call_addr))
return (zb_code *)call_addr;
call_addr++;
} else
{
assert (I386_MOD32_BASE_DISP_32 == modrm_byte.modrm.mod);
return (zb_code *)addr;
}
}
modrm_byte.byte = *(call_addr + 1);
if ((I386_INS_PUSH_Ib == *call_addr) || (I386_INS_PUSH_Iv == *call_addr))
{
while ((I386_INS_PUSH_Ib == *call_addr) || (I386_INS_PUSH_Iv == *call_addr))
{
if (I386_INS_PUSH_Ib == *call_addr)
call_addr += 1 + SIZEOF(unsigned char);
else
{
assert(I386_INS_PUSH_Iv == *call_addr);
call_addr += 1 + SIZEOF(int4);
}
}
modrm_byte.byte = *(call_addr + 1);
if ((I386_INS_Grp5_Prefix != *call_addr++) || (I386_INS_CALL_Ev != modrm_byte.modrm.reg_opcode))
return (zb_code *)addr;
assert((I386_MOD32_BASE_DISP_8 == modrm_byte.modrm.mod) || (I386_MOD32_BASE_DISP_32 == modrm_byte.modrm.mod));
assert(I386_REG_EBX == modrm_byte.modrm.r_m);
call_addr++;
if (I386_MOD32_BASE_DISP_8 == modrm_byte.modrm.mod)
{
if ((xf_linefetch * SIZEOF(int4) != *call_addr) && (xf_zbfetch * SIZEOF(int4) != *call_addr))
return (zb_code *)addr;
}
}
else if ((I386_INS_Grp5_Prefix == *call_addr) && (I386_INS_CALL_Ev != modrm_byte.modrm.reg_opcode))
{
call_addr++;
assert((I386_MOD32_BASE_DISP_8 == modrm_byte.modrm.mod) || (I386_MOD32_BASE_DISP_32 == modrm_byte.modrm.mod));
assert(I386_REG_EBX == modrm_byte.modrm.r_m);
call_addr++;
if (I386_MOD32_BASE_DISP_8 == modrm_byte.modrm.mod)
{
if ((xf_linestart * SIZEOF(int4) != *call_addr) && (xf_zbstart * SIZEOF(int4) != *call_addr))
return (zb_code *)addr;
}
}
return (zb_code *)call_addr;
}
|
