blob: 94b8644e0b53e5529d28babf628ec85d8ad43f81 (
plain)
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
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
|
# Linker Script for National Semiconductor's CRX-ELF32.
test -z "$RELOCATING" && exit 0
# The next line should be uncommented if it is desired to link
# without libstart.o and directly enter main.
# ENTRY=_main
test -z "$ENTRY" && ENTRY=_start
cat <<EOF
/* Example Linker Script for linking NS CRX elf32 files. */
OUTPUT_FORMAT("${OUTPUT_FORMAT}")
OUTPUT_ARCH(${ARCH})
ENTRY(${ENTRY})
/* Define memory regions. */
MEMORY
{
rom : ORIGIN = 0x2, LENGTH = 3M
ram : ORIGIN = 4M, LENGTH = 10M
}
/* Many sections come in three flavours. There is the 'real' section,
like ".data". Then there are the per-procedure or per-variable
sections, generated by -ffunction-sections and -fdata-sections in GCC,
and useful for --gc-sections, which for a variable "foo" might be
".data.foo". Then there are the linkonce sections, for which the linker
eliminates duplicates, which are named like ".gnu.linkonce.d.foo".
The exact correspondences are:
Section Linkonce section
.text .gnu.linkonce.t.foo
.rdata .gnu.linkonce.r.foo
.data .gnu.linkonce.d.foo
.bss .gnu.linkonce.b.foo
.debug_info .gnu.linkonce.wi.foo */
SECTIONS
{
.init :
{
__INIT_START = .;
KEEP (*(.init))
__INIT_END = .;
} > rom
.fini :
{
__FINI_START = .;
KEEP (*(.fini))
__FINI_END = .;
} > rom
.jcr :
{
KEEP (*(.jcr))
} > rom
.text :
{
__TEXT_START = .;
*(.text) *(.text.*) *(.gnu.linkonce.t.*)
__TEXT_END = .;
} > rom
.rdata :
{
__RDATA_START = .;
*(.rdata_4) *(.rdata_2) *(.rdata_1) *(.rdata.*) *(.gnu.linkonce.r.*) *(.rodata.*)
__RDATA_END = .;
} > rom
.ctor ALIGN(4) :
{
__CTOR_START = .;
/* The compiler uses crtbegin.o to find the start
of the constructors, so we make sure it is
first. Because this is a wildcard, it
doesn't matter if the user does not
actually link against crtbegin.o; the
linker won't look for a file to match a
wildcard. The wildcard also means that it
doesn't matter which directory crtbegin.o
is in. */
KEEP (*crtbegin.o(.ctors))
KEEP (*crtbegin?.o(.ctors))
/* We don't want to include the .ctor section from
the crtend.o file until after the sorted ctors.
The .ctor section from the crtend file contains the
end of ctors marker and it must be last */
KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o) .ctors))
KEEP (*(SORT(.ctors.*)))
KEEP (*(.ctors))
__CTOR_END = .;
} > rom
.dtor ALIGN(4) :
{
__DTOR_START = .;
KEEP (*crtbegin.o(.dtors))
KEEP (*crtbegin?.o(.dtors))
KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o) .dtors))
KEEP (*(SORT(.dtors.*)))
KEEP (*(.dtors))
__DTOR_END = .;
} > rom
.data :
{
__DATA_START = .;
*(.data_4) *(.data_2) *(.data_1) *(.data) *(.data.*) *(.gnu.linkonce.d.*)
__DATA_END = .;
} > ram AT > rom
.bss (NOLOAD) :
{
__BSS_START = .;
*(.bss_4) *(.bss_2) *(.bss_1) *(.bss) *(COMMON) *(.bss.*) *(.gnu.linkonce.b.*)
__BSS_END = .;
} > ram
/* You may change the sizes of the following sections to fit the actual
size your program requires.
The heap and stack are aligned to the bus width, as a speed optimization
for accessing data located there. */
.heap (NOLOAD) :
{
. = ALIGN(4);
__HEAP_START = .;
. += 0x2000; __HEAP_MAX = .;
} > ram
.stack (NOLOAD) :
{
. = ALIGN(4);
. += 0x6000;
__STACK_START = .;
} > ram
.istack (NOLOAD) :
{
. = ALIGN(4);
. += 0x100;
__ISTACK_START = .;
} > ram
.comment 0 : { *(.comment) }
/* DWARF debug sections.
Symbols in the DWARF debugging sections are relative to the beginning
of the section so we begin them at 0. */
.debug_aranges 0 : { *(.debug_aranges) }
.debug_pubnames 0 : { *(.debug_pubnames) }
.debug_info 0 : { *(.debug_info .gnu.linkonce.wi.*) }
.debug_abbrev 0 : { *(.debug_abbrev) }
.debug_line 0 : { *(.debug_line) }
.debug_frame 0 : { *(.debug_frame) }
.debug_str 0 : { *(.debug_str) }
.debug_loc 0 : { *(.debug_loc) }
.debug_macinfo 0 : { *(.debug_macinfo) }
}
__DATA_IMAGE_START = LOADADDR(.data);
EOF
|
