Commit | Line | Data |
---|---|---|
1fe1f39c | 1 | # Linker Script for National Semiconductor's CRX-ELF32. |
985743c7 | 2 | # |
219d1afa | 3 | # Copyright (C) 2014-2018 Free Software Foundation, Inc. |
6c19b93b | 4 | # |
985743c7 NC |
5 | # Copying and distribution of this file, with or without modification, |
6 | # are permitted in any medium without royalty provided the copyright | |
7 | # notice and this notice are preserved. | |
1fe1f39c NC |
8 | |
9 | # The next line should be uncommented if it is desired to link | |
10 | # without libstart.o and directly enter main. | |
11 | ||
12 | # ENTRY=_main | |
13 | ||
14 | test -z "$ENTRY" && ENTRY=_start | |
15 | cat <<EOF | |
16 | ||
985743c7 NC |
17 | /* Example Linker Script for linking NS CRX elf32 files. |
18 | ||
219d1afa | 19 | Copyright (C) 2014-2018 Free Software Foundation, Inc. |
985743c7 NC |
20 | |
21 | Copying and distribution of this script, with or without modification, | |
22 | are permitted in any medium without royalty provided the copyright | |
23 | notice and this notice are preserved. */ | |
24 | ||
1fe1f39c | 25 | |
1fe1f39c NC |
26 | OUTPUT_FORMAT("${OUTPUT_FORMAT}") |
27 | OUTPUT_ARCH(${ARCH}) | |
ec2d9b29 | 28 | ${RELOCATING+ENTRY(${ENTRY})} |
1fe1f39c NC |
29 | |
30 | /* Define memory regions. */ | |
31 | MEMORY | |
32 | { | |
6c19b93b AM |
33 | rom : ORIGIN = 0x2, LENGTH = 3M |
34 | ram : ORIGIN = 4M, LENGTH = 10M | |
1fe1f39c NC |
35 | } |
36 | ||
42851540 NC |
37 | /* Many sections come in three flavours. There is the 'real' section, |
38 | like ".data". Then there are the per-procedure or per-variable | |
39 | sections, generated by -ffunction-sections and -fdata-sections in GCC, | |
40 | and useful for --gc-sections, which for a variable "foo" might be | |
41 | ".data.foo". Then there are the linkonce sections, for which the linker | |
42 | eliminates duplicates, which are named like ".gnu.linkonce.d.foo". | |
43 | The exact correspondences are: | |
44 | ||
45 | Section Linkonce section | |
46 | .text .gnu.linkonce.t.foo | |
47 | .rdata .gnu.linkonce.r.foo | |
48 | .data .gnu.linkonce.d.foo | |
49 | .bss .gnu.linkonce.b.foo | |
50 | .debug_info .gnu.linkonce.wi.foo */ | |
51 | ||
1fe1f39c NC |
52 | SECTIONS |
53 | { | |
42851540 | 54 | .init : |
6c19b93b AM |
55 | { |
56 | __INIT_START = .; | |
1fa32646 | 57 | KEEP (*(.init)) |
6c19b93b | 58 | __INIT_END = .; |
42851540 NC |
59 | } > rom |
60 | ||
61 | .fini : | |
6c19b93b AM |
62 | { |
63 | __FINI_START = .; | |
1fa32646 | 64 | KEEP (*(.fini)) |
6c19b93b | 65 | __FINI_END = .; |
42851540 NC |
66 | } > rom |
67 | ||
68 | .jcr : | |
6c19b93b | 69 | { |
1fa32646 | 70 | KEEP (*(.jcr)) |
42851540 NC |
71 | } > rom |
72 | ||
6c19b93b | 73 | .text : |
42851540 NC |
74 | { |
75 | __TEXT_START = .; | |
76 | *(.text) *(.text.*) *(.gnu.linkonce.t.*) | |
77 | __TEXT_END = .; | |
78 | } > rom | |
79 | ||
80 | .rdata : | |
81 | { | |
82 | __RDATA_START = .; | |
b7309ada | 83 | *(.rdata_4) *(.rdata_2) *(.rdata_1) *(.rdata.*) *(.gnu.linkonce.r.*) *(.rodata.*) |
42851540 NC |
84 | __RDATA_END = .; |
85 | } > rom | |
86 | ||
6c19b93b AM |
87 | .ctor ALIGN(4) : |
88 | { | |
89 | __CTOR_START = .; | |
42851540 NC |
90 | /* The compiler uses crtbegin.o to find the start |
91 | of the constructors, so we make sure it is | |
92 | first. Because this is a wildcard, it | |
93 | doesn't matter if the user does not | |
94 | actually link against crtbegin.o; the | |
95 | linker won't look for a file to match a | |
96 | wildcard. The wildcard also means that it | |
97 | doesn't matter which directory crtbegin.o | |
98 | is in. */ | |
99 | ||
40cf2291 AM |
100 | KEEP (*crtbegin.o(.ctors)) |
101 | KEEP (*crtbegin?.o(.ctors)) | |
6c19b93b | 102 | |
42851540 NC |
103 | /* We don't want to include the .ctor section from |
104 | the crtend.o file until after the sorted ctors. | |
105 | The .ctor section from the crtend file contains the | |
106 | end of ctors marker and it must be last */ | |
107 | ||
40cf2291 | 108 | KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o) .ctors)) |
42851540 NC |
109 | KEEP (*(SORT(.ctors.*))) |
110 | KEEP (*(.ctors)) | |
6c19b93b | 111 | __CTOR_END = .; |
42851540 NC |
112 | } > rom |
113 | ||
6c19b93b AM |
114 | .dtor ALIGN(4) : |
115 | { | |
116 | __DTOR_START = .; | |
40cf2291 AM |
117 | KEEP (*crtbegin.o(.dtors)) |
118 | KEEP (*crtbegin?.o(.dtors)) | |
119 | KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o) .dtors)) | |
42851540 NC |
120 | KEEP (*(SORT(.dtors.*))) |
121 | KEEP (*(.dtors)) | |
6c19b93b | 122 | __DTOR_END = .; |
42851540 NC |
123 | } > rom |
124 | ||
125 | .data : | |
126 | { | |
127 | __DATA_START = .; | |
128 | *(.data_4) *(.data_2) *(.data_1) *(.data) *(.data.*) *(.gnu.linkonce.d.*) | |
129 | __DATA_END = .; | |
130 | } > ram AT > rom | |
131 | ||
132 | .bss (NOLOAD) : | |
133 | { | |
134 | __BSS_START = .; | |
135 | *(.bss_4) *(.bss_2) *(.bss_1) *(.bss) *(COMMON) *(.bss.*) *(.gnu.linkonce.b.*) | |
136 | __BSS_END = .; | |
137 | } > ram | |
1fe1f39c NC |
138 | |
139 | /* You may change the sizes of the following sections to fit the actual | |
140 | size your program requires. | |
141 | ||
142 | The heap and stack are aligned to the bus width, as a speed optimization | |
143 | for accessing data located there. */ | |
144 | ||
7ba29e2a | 145 | .heap (NOLOAD) : |
42851540 NC |
146 | { |
147 | . = ALIGN(4); | |
148 | __HEAP_START = .; | |
149 | . += 0x2000; __HEAP_MAX = .; | |
150 | } > ram | |
151 | ||
7ba29e2a | 152 | .stack (NOLOAD) : |
42851540 NC |
153 | { |
154 | . = ALIGN(4); | |
155 | . += 0x6000; | |
156 | __STACK_START = .; | |
157 | } > ram | |
158 | ||
7ba29e2a | 159 | .istack (NOLOAD) : |
42851540 NC |
160 | { |
161 | . = ALIGN(4); | |
162 | . += 0x100; | |
163 | __ISTACK_START = .; | |
164 | } > ram | |
165 | ||
166 | .comment 0 : { *(.comment) } | |
167 | ||
ceb0a680 NC |
168 | EOF |
169 | ||
d061dfac | 170 | . $srcdir/scripttempl/DWARF.sc |
ceb0a680 NC |
171 | |
172 | cat <<EOF | |
1fe1f39c NC |
173 | } |
174 | ||
175 | __DATA_IMAGE_START = LOADADDR(.data); | |
176 | EOF |