-
Notifications
You must be signed in to change notification settings - Fork 9
/
dwarf_get_fde_info_for_all_regs.3
155 lines (155 loc) · 4.44 KB
/
dwarf_get_fde_info_for_all_regs.3
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
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
.\" Copyright (c) 2011 Kai Wang
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" $Id: dwarf_get_fde_info_for_all_regs.3 2071 2011-10-27 03:20:00Z jkoshy $
.\"
.Dd June 4, 2011
.Os
.Dt DWARF_GET_FDE_INFO_FOR_ALL_REGS 3
.Sh NAME
.Nm dwarf_get_fde_info_for_all_regs
.Nd retrieve register rule row
.Sh LIBRARY
.Lb libdwarf
.Sh SYNOPSIS
.In libdwarf.h
.Ft int
.Fo dwarf_get_fde_info_for_all_regs
.Fa "Dwarf_Fde fde"
.Fa "Dwarf_Addr pc"
.Fa "Dwarf_Regtable *reg_table"
.Fa "Dwarf_Addr *row_pc"
.Fa "Dwarf_Error *err"
.Fc
.Sh DESCRIPTION
Function
.Fn dwarf_get_fde_info_for_all_regs
retrieves a row from the register rule table associated with the given
FDE descriptor.
.Pp
Argument
.Ar fde
should reference a valid DWARF FDE descriptor.
.Pp
Argument
.Ar pc
should hold the program counter address to be used to locate the
desired table row.
.Pp
Argument
.Ar reg_table
should point to a
.Vt Dwarf_Regtable
descriptor which will hold the returned table row of register rules.
.Pp
Argument
.Ar row_pc
should point to a location which will be set to the lowest program
counter address associated with the table row.
.Pp
If argument
.Ar err
is not NULL, it will be used to store error information in case of an
error.
.Pp
The
.Vt Dwarf_Regtable
descriptor is defined in the header file
.In libdwarf.h :
.Bd -literal -offset indent
typedef struct {
struct {
Dwarf_Small dw_offset_relevant;
Dwarf_Half dw_regnum;
Dwarf_Addr dw_offset;
} rules[DW_REG_TABLE_SIZE];
} Dwarf_Regtable;
.Ed
.Pp
For each of the register rules returned,
the
.Va dw_offset_relevant
field is set to 1 if the register rule has a offset value. The
.Va dw_regnum
field is set to the register number associated with the regsiter rule.
The
.Va dw_offset
field is set to the offset value associated with the register rule.
.Pp
The number of register columns returned is either the constant
value
.Dv DW_REG_TABLE_SIZE as defined
in the header file
.In libdwarf.h ,
or the value set by function
.Xr dwarf_set_frame_rule_table_size 3 ,
whichever is smaller.
.Ss COMPATIBILITY
Function
.Fn dwarf_get_fde_info_for_all_regs
is deprecated since it only supports DWARF2 frame sections.
Applications should instead use function
.Xr dwarf_get_fde_info_for_all_regs3 3
which supports both DWARF2 and DWARF3 frame sections.
.Sh RETURN VALUES
Function
.Fn dwarf_get_fde_info_for_all_regs
returns
.Dv DW_DLV_OK
when it succeeds.
In case of an error, it returns
.Dv DW_DLV_ERROR
and sets the argument
.Ar err .
.Sh ERRORS
Function
.Fn dwarf_get_fde_info_for_all_regs
can fail with:
.Bl -tag -width ".Bq Er DW_DLE_PC_NOT_IN_FDE_RANGE"
.It Bq Er DW_DLE_ARGUMENT
One of the arguments
.Ar fde ,
.Ar reg_table
or
.Ar row_pc
was NULL.
.It Bq Er DW_DLE_PC_NOT_IN_FDE_RANGE
The program counter value provided in argument
.Ar pc
did not fall in the range covered by argument
.Ar fde .
.El
.Sh SEE ALSO
.Xr dwarf 3 ,
.Xr dwarf_get_fde_at_pc 3 ,
.Xr dwarf_get_fde_info_for_all_regs3 3 ,
.Xr dwarf_get_fde_info_for_cfa_reg3 3 ,
.Xr dwarf_get_fde_info_for_reg 3 ,
.Xr dwarf_get_fde_info_for_reg3 3 ,
.Xr dwarf_get_fde_n 3 ,
.Xr dwarf_set_frame_cfa_value 3 ,
.Xr dwarf_set_frame_rule_table_size 3 ,
.Xr dwarf_set_frame_rule_initial_value 3 ,
.Xr dwarf_set_frame_same_value 3 ,
.Xr dwarf_set_frame_undefined_value 3