Commit | Line | Data |
---|---|---|
86530b38 AT |
1 | # -*- perl -*- |
2 | ||
3 | package Midas::Segment; | |
4 | use strict; | |
5 | use warnings; | |
6 | use Carp; | |
7 | use Tie::IxHash; | |
8 | use Midas::Command; | |
9 | use Midas::Error; | |
10 | ||
11 | use fields qw(type); | |
12 | ||
13 | use constant | |
14 | { | |
15 | SEG_UNDEF => 0, | |
16 | SEG_TEXT => 1, | |
17 | SEG_DATA => 2, | |
18 | SEG_BSS => 3, | |
19 | }; | |
20 | ||
21 | require Exporter; | |
22 | ||
23 | our @ISA = qw(Exporter); | |
24 | our @EXPORT = qw(SEG_UNDEF SEG_TEXT SEG_DATA SEG_BSS); | |
25 | ||
26 | ||
27 | ||
28 | our %Segments = | |
29 | ( | |
30 | SEG_TEXT() => { | |
31 | name => 'text', | |
32 | link_suffix => 't', | |
33 | va_name => 'text_va', | |
34 | elfname => '.text', | |
35 | include_elf => [qw(.rodata)], | |
36 | elfname_out => '.text .rodata', | |
37 | }, | |
38 | SEG_DATA() => { | |
39 | name => 'data', | |
40 | link_suffix => 'd', | |
41 | va_name => 'data_va', | |
42 | elfname => '.data', | |
43 | }, | |
44 | SEG_BSS() => { | |
45 | name => 'bss', | |
46 | link_suffix => 'b', | |
47 | va_name => 'bss_va', | |
48 | elfname => '.bss', | |
49 | }, | |
50 | ); | |
51 | ||
52 | ||
53 | ||
54 | our %RevNames = map { ( $Segments{$_}{name}, $_) } keys %Segments; | |
55 | our %ElfNames = map | |
56 | { defined $Segments{$_}{elfname} ? | |
57 | ( $Segments{$_}{elfname}, $Segments{$_}{name} ) : () } keys %Segments; | |
58 | ||
59 | foreach my $code (keys %Segments) { | |
60 | next unless exists $Segments{$code}{include_elf}; | |
61 | foreach my $included (@{$Segments{$code}{include_elf}}) { | |
62 | $ElfNames{$included} = $Segments{$code}{name}; | |
63 | } | |
64 | } | |
65 | ||
66 | our %LinkSuffixes = map | |
67 | { ( $Segments{$_}{link_suffix}, $Segments{$_}{name} ) } keys %Segments; | |
68 | ||
69 | # rodata must appear before text or the linker will merge them | |
70 | #our @Names = qw(rodata text data bss); | |
71 | our @Names = qw(text data bss); | |
72 | ||
73 | my @keys = keys %Segments; | |
74 | if(@keys > @Names) { | |
75 | fatal "In Midas::Segment, @Names is incomplete.\n", M_CODE; | |
76 | } elsif(@Names > @keys) { | |
77 | fatal "In Midas::Segment, @Names has extra entry\n", M_CODE; | |
78 | } | |
79 | foreach my $name (@Names) { | |
80 | fatal "Segment name '$name' is not set up correctly in Midas::Segment\n", | |
81 | M_CODE unless exists $RevNames{$name}; | |
82 | } | |
83 | ||
84 | ############################################################################### | |
85 | ||
86 | sub new { | |
87 | my $class = shift; | |
88 | my $type = shift; | |
89 | ||
90 | $type = $class->name2type($type) if $type =~ /[a-zA-Z]/; | |
91 | ||
92 | my $this; | |
93 | if(ref $class) { | |
94 | my $classtype = ref $class; | |
95 | $this = fields::new($classtype); | |
96 | $this->{type} = $class->type() if defined $class->type(); | |
97 | } else { | |
98 | $this = fields::new($class); | |
99 | $this->{type} = $type if defined $type; | |
100 | } | |
101 | return $this; | |
102 | } | |
103 | ||
104 | ############################################################################### | |
105 | ||
106 | sub type { | |
107 | my $this = shift; | |
108 | my $set = shift; | |
109 | ||
110 | if(defined $set) { | |
111 | fatal Carp::longmess("No such segment type '$set'.\n"), M_CODE | |
112 | unless exists $Segments{$set}{name}; | |
113 | $this->{type} = $set; | |
114 | } | |
115 | return $this->{type}; | |
116 | } | |
117 | ||
118 | ############################################################################### | |
119 | ||
120 | sub name { | |
121 | my $this = shift; | |
122 | my $set = shift; | |
123 | ||
124 | if(defined $set) { | |
125 | $this->type($this->name2type($set)); | |
126 | } | |
127 | return $this->type2name($this->{type}); | |
128 | } | |
129 | ||
130 | ############################################################################### | |
131 | ############################################################################### | |
132 | ||
133 | sub is_segment_name { | |
134 | my $class = shift; | |
135 | my $name = shift; | |
136 | ||
137 | return 1 if exists $RevNames{$name}; | |
138 | return 0; | |
139 | } | |
140 | ||
141 | ############################################################################### | |
142 | ||
143 | sub name2type { | |
144 | my $class = shift; | |
145 | my $name = shift; | |
146 | ||
147 | fatal Carp::longmess("No such segment name '$name'.\n"), M_CODE | |
148 | unless exists $RevNames{$name}; | |
149 | ||
150 | return $RevNames{$name}; | |
151 | } | |
152 | ||
153 | ############################################################################### | |
154 | ||
155 | sub name2va_name { | |
156 | my $class = shift; | |
157 | my $name = shift; | |
158 | ||
159 | fatal Carp::longmess("No such segment name '$name'.\n"), M_CODE | |
160 | unless exists $RevNames{$name}; | |
161 | ||
162 | return $Segments{$RevNames{$name}}{va_name}; | |
163 | } | |
164 | ||
165 | ############################################################################### | |
166 | ||
167 | sub name2elf_name { | |
168 | my $class = shift; | |
169 | my $name = shift; | |
170 | ||
171 | fatal Carp::longmess("No such segment name '$name'.\n"), M_CODE | |
172 | unless exists $RevNames{$name}; | |
173 | ||
174 | return exists $Segments{$RevNames{$name}}{elfname_out} ? | |
175 | $Segments{$RevNames{$name}}{elfname_out} : | |
176 | $Segments{$RevNames{$name}}{elfname}; | |
177 | } | |
178 | ||
179 | ############################################################################### | |
180 | ||
181 | sub name2link_suffix { | |
182 | my $class = shift; | |
183 | my $name = shift; | |
184 | ||
185 | fatal Carp::longmess("No such segment name '$name'.\n"), M_CODE | |
186 | unless exists $RevNames{$name}; | |
187 | ||
188 | return $Segments{$RevNames{$name}}{link_suffix}; | |
189 | } | |
190 | ||
191 | ############################################################################### | |
192 | ||
193 | sub type2name { | |
194 | my $class = shift; | |
195 | my $type = shift; | |
196 | ||
197 | fatal Carp::longmess("No such segment type '$type'.\n"), M_CODE | |
198 | unless exists $Segments{$type}{name}; | |
199 | ||
200 | return $Segments{$type}{name}; | |
201 | } | |
202 | ||
203 | ############################################################################### | |
204 | ||
205 | sub all_names { | |
206 | my $class = shift; | |
207 | return @Names; | |
208 | } | |
209 | ||
210 | ############################################################################### | |
211 | ||
212 | sub all_va_names { | |
213 | my $class = shift; | |
214 | return map { $Segments{$_}{va_name} } keys %Segments; | |
215 | } | |
216 | ||
217 | ############################################################################### | |
218 | ############################################################################### | |
219 | 1; |