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 | 8 | |
2bf2bf23 AM |
9 | # Using an empty script for ld -r is better than mashing together |
10 | # sections. This hack likely leaves ld -Ur broken. | |
11 | test -n "${RELOCATING}" || exit 0 | |
12 | ||
1fe1f39c NC |
13 | # The next line should be uncommented if it is desired to link |
14 | # without libstart.o and directly enter main. | |
15 | ||
16 | # ENTRY=_main | |
17 | ||
18 | test -z "$ENTRY" && ENTRY=_start | |
19 | cat <<EOF | |
20 | ||
985743c7 NC |
21 | /* Example Linker Script for linking NS CRX elf32 files. |
22 | ||
219d1afa | 23 | Copyright (C) 2014-2018 Free Software Foundation, Inc. |
985743c7 NC |
24 | |
25 | Copying and distribution of this script, with or without modification, | |
26 | are permitted in any medium without royalty provided the copyright | |
27 | notice and this notice are preserved. */ | |
28 | ||
1fe1f39c | 29 | |
1fe1f39c NC |
30 | OUTPUT_FORMAT("${OUTPUT_FORMAT}") |
31 | OUTPUT_ARCH(${ARCH}) | |
ec2d9b29 | 32 | ${RELOCATING+ENTRY(${ENTRY})} |
1fe1f39c NC |
33 | |
34 | /* Define memory regions. */ | |
35 | MEMORY | |
36 | { | |
6c19b93b AM |
37 | rom : ORIGIN = 0x2, LENGTH = 3M |
38 | ram : ORIGIN = 4M, LENGTH = 10M | |
1fe1f39c NC |
39 | } |
40 | ||
42851540 NC |
41 | /* Many sections come in three flavours. There is the 'real' section, |
42 | like ".data". Then there are the per-procedure or per-variable | |
43 | sections, generated by -ffunction-sections and -fdata-sections in GCC, | |
44 | and useful for --gc-sections, which for a variable "foo" might be | |
45 | ".data.foo". Then there are the linkonce sections, for which the linker | |
46 | eliminates duplicates, which are named like ".gnu.linkonce.d.foo". | |
47 | The exact correspondences are: | |
48 | ||
49 | Section Linkonce section | |
50 | .text .gnu.linkonce.t.foo | |
51 | .rdata .gnu.linkonce.r.foo | |
52 | .data .gnu.linkonce.d.foo | |
53 | .bss .gnu.linkonce.b.foo | |
54 | .debug_info .gnu.linkonce.wi.foo */ | |
55 | ||
1fe1f39c NC |
56 | SECTIONS |
57 | { | |
42851540 | 58 | .init : |
6c19b93b AM |
59 | { |
60 | __INIT_START = .; | |
1fa32646 | 61 | KEEP (*(.init)) |
6c19b93b | 62 | __INIT_END = .; |
42851540 NC |
63 | } > rom |
64 | ||
65 | .fini : | |
6c19b93b AM |
66 | { |
67 | __FINI_START = .; | |
1fa32646 | 68 | KEEP (*(.fini)) |
6c19b93b | 69 | __FINI_END = .; |
42851540 NC |
70 | } > rom |
71 | ||
72 | .jcr : | |
6c19b93b | 73 | { |
1fa32646 | 74 | KEEP (*(.jcr)) |
42851540 NC |
75 | } > rom |
76 | ||
6c19b93b | 77 | .text : |
42851540 NC |
78 | { |
79 | __TEXT_START = .; | |
80 | *(.text) *(.text.*) *(.gnu.linkonce.t.*) | |
81 | __TEXT_END = .; | |
82 | } > rom | |
83 | ||
84 | .rdata : | |
85 | { | |
86 | __RDATA_START = .; | |
b7309ada | 87 | *(.rdata_4) *(.rdata_2) *(.rdata_1) *(.rdata.*) *(.gnu.linkonce.r.*) *(.rodata.*) |
42851540 NC |
88 | __RDATA_END = .; |
89 | } > rom | |
90 | ||
6c19b93b AM |
91 | .ctor ALIGN(4) : |
92 | { | |
93 | __CTOR_START = .; | |
42851540 NC |
94 | /* The compiler uses crtbegin.o to find the start |
95 | of the constructors, so we make sure it is | |
96 | first. Because this is a wildcard, it | |
97 | doesn't matter if the user does not | |
98 | actually link against crtbegin.o; the | |
99 | linker won't look for a file to match a | |
100 | wildcard. The wildcard also means that it | |
101 | doesn't matter which directory crtbegin.o | |
102 | is in. */ | |
103 | ||
40cf2291 AM |
104 | KEEP (*crtbegin.o(.ctors)) |
105 | KEEP (*crtbegin?.o(.ctors)) | |
6c19b93b | 106 | |
42851540 NC |
107 | /* We don't want to include the .ctor section from |
108 | the crtend.o file until after the sorted ctors. | |
109 | The .ctor section from the crtend file contains the | |
110 | end of ctors marker and it must be last */ | |
111 | ||
40cf2291 | 112 | KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o) .ctors)) |
42851540 NC |
113 | KEEP (*(SORT(.ctors.*))) |
114 | KEEP (*(.ctors)) | |
6c19b93b | 115 | __CTOR_END = .; |
42851540 NC |
116 | } > rom |
117 | ||
6c19b93b AM |
118 | .dtor ALIGN(4) : |
119 | { | |
120 | __DTOR_START = .; | |
40cf2291 AM |
121 | KEEP (*crtbegin.o(.dtors)) |
122 | KEEP (*crtbegin?.o(.dtors)) | |
123 | KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o) .dtors)) | |
42851540 NC |
124 | KEEP (*(SORT(.dtors.*))) |
125 | KEEP (*(.dtors)) | |
6c19b93b | 126 | __DTOR_END = .; |
42851540 NC |
127 | } > rom |
128 | ||
129 | .data : | |
130 | { | |
131 | __DATA_START = .; | |
132 | *(.data_4) *(.data_2) *(.data_1) *(.data) *(.data.*) *(.gnu.linkonce.d.*) | |
133 | __DATA_END = .; | |
134 | } > ram AT > rom | |
135 | ||
136 | .bss (NOLOAD) : | |
137 | { | |
138 | __BSS_START = .; | |
139 | *(.bss_4) *(.bss_2) *(.bss_1) *(.bss) *(COMMON) *(.bss.*) *(.gnu.linkonce.b.*) | |
140 | __BSS_END = .; | |
141 | } > ram | |
1fe1f39c NC |
142 | |
143 | /* You may change the sizes of the following sections to fit the actual | |
144 | size your program requires. | |
145 | ||
146 | The heap and stack are aligned to the bus width, as a speed optimization | |
147 | for accessing data located there. */ | |
148 | ||
7ba29e2a | 149 | .heap (NOLOAD) : |
42851540 NC |
150 | { |
151 | . = ALIGN(4); | |
152 | __HEAP_START = .; | |
153 | . += 0x2000; __HEAP_MAX = .; | |
154 | } > ram | |
155 | ||
7ba29e2a | 156 | .stack (NOLOAD) : |
42851540 NC |
157 | { |
158 | . = ALIGN(4); | |
159 | . += 0x6000; | |
160 | __STACK_START = .; | |
161 | } > ram | |
162 | ||
7ba29e2a | 163 | .istack (NOLOAD) : |
42851540 NC |
164 | { |
165 | . = ALIGN(4); | |
166 | . += 0x100; | |
167 | __ISTACK_START = .; | |
168 | } > ram | |
169 | ||
170 | .comment 0 : { *(.comment) } | |
171 | ||
ceb0a680 NC |
172 | EOF |
173 | ||
d061dfac | 174 | . $srcdir/scripttempl/DWARF.sc |
ceb0a680 NC |
175 | |
176 | cat <<EOF | |
1fe1f39c NC |
177 | } |
178 | ||
179 | __DATA_IMAGE_START = LOADADDR(.data); | |
180 | EOF |