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
173
174
175
176
177
178
179
180
181
182
183
184
|
# Copyright (C) 2014-2020 Free Software Foundation, Inc.
#
# Copying and distribution of this file, with or without modification,
# are permitted in any medium without royalty provided the copyright
# notice and this notice are preserved.
# 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
# .rodata .gnu.linkonce.r.foo
# .data .gnu.linkonce.d.foo
# .bss .gnu.linkonce.b.foo
# .sdata .gnu.linkonce.s.foo
# .sbss .gnu.linkonce.sb.foo
# .sdata2 .gnu.linkonce.s2.foo
# .sbss2 .gnu.linkonce.sb2.foo
# .debug_info .gnu.linkonce.wi.foo
# .tdata .gnu.linkonce.td.foo
# .tbss .gnu.linkonce.tb.foo
# .lrodata .gnu.linkonce.lr.foo
# .ldata .gnu.linkonce.l.foo
# .lbss .gnu.linkonce.lb.foo
#
# Each of these can also have corresponding .rel.* and .rela.* sections.
test -z "$ENTRY" && ENTRY=__start
cat <<EOF
OUTPUT_FORMAT("${OUTPUT_FORMAT}")
ENTRY(${ENTRY})
EOF
test -n "${RELOCATING}" && cat <<EOF
/* Start and end of main stack. Assumes 256K of RAM. */
_estack = 0xe0040000 - 4;
_sstack = 0xe0040000 - 64K;
/* End of heap. */
_eheap = _sstack - 4;
MEMORY
{
init : ORIGIN = 0x00000000, LENGTH = 0x0003fffc
scr : ORIGIN = 0x0003fffc, LENGTH = 0x00000004
rom : ORIGIN = 0x00044000, LENGTH = 0x1ffbc000
ram : ORIGIN = 0xe0000000, LENGTH = 0x10000000
saferam : ORIGIN = 0xf0000000, LENGTH = 0x10000000
}
EOF
cat <<EOF
SECTIONS
{
.init ${RELOCATING-0} : {
KEEP (*(SORT_NONE(.init)))
${RELOCATING+KEEP (*(SORT_NONE(.fini)))}
${RELOCATING+ _einit = .;}
} ${RELOCATING+ > init}
.text ${RELOCATING-0} : {
${RELOCATING+ _ftext = .;}
*(.text)
${RELOCATING+*(.text.*)}
${RELOCATING+*(.gnu.linkonce.t.*)}
${RELOCATING+ _etext = .;}
} ${RELOCATING+ > rom}
.ctors ${RELOCATING-0} : {
${CONSTRUCTING+ . = ALIGN(4);}
${CONSTRUCTING+ __CTOR_LIST__ = .;}
/* gcc 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))
/* We don't want to include the .ctor section from
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) .ctors))
${RELOCATING+KEEP (*(SORT(.ctors.*)))}
KEEP (*(.ctors))
${CONSTRUCTING+ __CTOR_END__ = .;}
} ${RELOCATING+ > rom}
.dtors ${RELOCATING-0} : {
${CONSTRUCTING+ __DTOR_LIST__ = .;}
KEEP (*crtbegin*.o(.dtors))
KEEP (*(EXCLUDE_FILE (*crtend*.o) .dtors))
${RELOCATING+KEEP (*(SORT(.dtors.*)))}
KEEP (*(.dtors))
${CONSTRUCTING+ __DTOR_END__ = .;}
} ${RELOCATING+ > rom}
.rodata ${RELOCATING-0} : {
${RELOCATING+ . = ALIGN(4);}
${RELOCATING+ _srdata = .;}
${RELOCATING+*(.rdata)}
*(.rodata)
${RELOCATING+*(.rodata.*)}
${RELOCATING+*(.gnu.linkonce.r.*)}
${RELOCATING+ . = ALIGN(4);}
${RELOCATING+ _erdata = .;}
} ${RELOCATING+ > rom}
.eh_frame ${RELOCATING-0} :
{
${RELOCATING+PROVIDE (__eh_frame_begin = .);}
*(.eh_frame)
${RELOCATING+ LONG (0);}
${RELOCATING+PROVIDE (__eh_frame_end = .);}
} ${RELOCATING+ > rom}
.gcc_except_table ${RELOCATING-0} : { *(.gcc_except_table) } ${RELOCATING+ > rom}
.jcr ${RELOCATING-0} : { *(.jcr) } ${RELOCATING+ > rom}
.data ${RELOCATING-0} : {
${RELOCATING+ . = ALIGN(4);}
${RELOCATING+ _sdata = .;}
*(.data)
${RELOCATING+*(.data.*)}
${RELOCATING+*(.gnu.linkonce.d.*)}
${RELOCATING+ . = ALIGN(4);}
${RELOCATING+ _edata = .;}
} ${RELOCATING+ > ram}
.bss ${RELOCATING-0} : {
${RELOCATING+ . = ALIGN(4);}
${RELOCATING+ __bss_start = .;}
*(.bss)
${RELOCATING+*(.bss.*)}
${RELOCATING+*(.gnu.linkonce.b.*)}
${RELOCATING+*(COMMON)}
${RELOCATING+ . = ALIGN(4);}
${RELOCATING+ __bss_end = .;}
${RELOCATING+ _sheap = .;}
} ${RELOCATING+ > ram}
saferam ${RELOCATING-0} : {
*(saferam)
${RELOCATING+ . = ALIGN(4);}
${RELOCATING+ unitidentry = .;}
} ${RELOCATING+ > saferam}
/* Stabs debugging sections. */
.stab 0 : { *(.stab) }
.stabstr 0 : { *(.stabstr) }
.stab.excl 0 : { *(.stab.excl) }
.stab.exclstr 0 : { *(.stab.exclstr) }
.stab.index 0 : { *(.stab.index) }
.stab.indexstr 0 : { *(.stab.indexstr) }
.comment 0 : { *(.comment) }
EOF
. $srcdir/scripttempl/DWARF.sc
cat <<EOF
}
${RELOCATING+
/* Provide a default address for the simulated file-I/O device. */
PROVIDE (_sim_fileio_register = 0x2fff0000);
/* Provide a default address for the simulated command line device. */
PROVIDE (_sim_cmdline_header = 0x2ffe0000);
/* Provide a default address for the simulated 1 MHz clock. */
PROVIDE (_sim_clock = 0x20002100);}
EOF
|
