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3d3d428f NC |
1 | # Linker Script for National Semiconductor's CR16-ELF32. |
2 | ||
3 | # The next line should be uncommented if it is desired to link | |
4 | # without libstart.o and directly enter main. | |
5 | ||
6 | # ENTRY=_main | |
7 | ||
8 | test -z "$ENTRY" && ENTRY=_start | |
9 | cat <<EOF | |
10 | ||
11 | /* Example Linker Script for linking NS CR16 elf32 files. */ | |
12 | ||
3d3d428f NC |
13 | OUTPUT_FORMAT("${OUTPUT_FORMAT}") |
14 | OUTPUT_ARCH(${ARCH}) | |
ec2d9b29 | 15 | ${RELOCATING+ENTRY(${ENTRY})} |
3d3d428f NC |
16 | |
17 | /* Define memory regions. */ | |
18 | MEMORY | |
19 | { | |
20 | rom : ORIGIN = 0x2, LENGTH = 3M | |
21 | ram : ORIGIN = 4M, LENGTH = 10M | |
22 | } | |
23 | ||
24 | /* Many sections come in three flavours. There is the 'real' section, | |
25 | like ".data". Then there are the per-procedure or per-variable | |
26 | sections, generated by -ffunction-sections and -fdata-sections in GCC, | |
27 | and useful for --gc-sections, which for a variable "foo" might be | |
28 | ".data.foo". Then there are the linkonce sections, for which the linker | |
29 | eliminates duplicates, which are named like ".gnu.linkonce.d.foo". | |
30 | The exact correspondences are: | |
31 | ||
32 | Section Linkonce section | |
33 | .text .gnu.linkonce.t.foo | |
34 | .rdata .gnu.linkonce.r.foo | |
35 | .data .gnu.linkonce.d.foo | |
36 | .bss .gnu.linkonce.b.foo | |
37 | .debug_info .gnu.linkonce.wi.foo */ | |
38 | ||
39 | SECTIONS | |
40 | { | |
41 | .init : | |
42 | { | |
43 | __INIT_START = .; | |
44 | KEEP (*(.init)) | |
45 | __INIT_END = .; | |
46 | } > rom | |
47 | ||
48 | .fini : | |
49 | { | |
50 | __FINI_START = .; | |
51 | KEEP (*(.fini)) | |
52 | __FINI_END = .; | |
53 | } > rom | |
54 | ||
55 | .jcr : | |
56 | { | |
57 | KEEP (*(.jcr)) | |
58 | } > rom | |
59 | ||
60 | .text : | |
61 | { | |
62 | __TEXT_START = .; | |
63 | *(.text) *(.text.*) *(.gnu.linkonce.t.*) | |
64 | __TEXT_END = .; | |
65 | } > rom | |
66 | ||
67 | .rdata : | |
68 | { | |
69 | __RDATA_START = .; | |
70 | *(.rdata_4) *(.rdata_2) *(.rdata_1) *(.rdata.*) *(.gnu.linkonce.r.*) *(.rodata*) | |
71 | __RDATA_END = .; | |
72 | } > rom | |
73 | ||
74 | .ctor ALIGN(4) : | |
75 | { | |
76 | __CTOR_START = .; | |
77 | /* The compiler uses crtbegin.o to find the start | |
78 | of the constructors, so we make sure it is | |
79 | first. Because this is a wildcard, it | |
80 | doesn't matter if the user does not | |
81 | actually link against crtbegin.o; the | |
82 | linker won't look for a file to match a | |
83 | wildcard. The wildcard also means that it | |
84 | doesn't matter which directory crtbegin.o | |
85 | is in. */ | |
86 | ||
87 | KEEP (*crtbegin*.o(.ctors)) | |
88 | ||
89 | /* We don't want to include the .ctor section from | |
90 | the crtend.o file until after the sorted ctors. | |
91 | The .ctor section from the crtend file contains the | |
92 | end of ctors marker and it must be last */ | |
93 | ||
94 | KEEP (*(EXCLUDE_FILE (*crtend*.o) .ctors)) | |
95 | KEEP (*(SORT(.ctors.*))) | |
96 | KEEP (*(.ctors)) | |
97 | __CTOR_END = .; | |
98 | } > rom | |
99 | ||
100 | .dtor ALIGN(4) : | |
101 | { | |
102 | __DTOR_START = .; | |
103 | KEEP (*crtbegin*.o(.dtors)) | |
104 | KEEP (*(EXCLUDE_FILE (*crtend*.o) .dtors)) | |
105 | KEEP (*(SORT(.dtors.*))) | |
106 | KEEP (*(.dtors)) | |
107 | __DTOR_END = .; | |
108 | } > rom | |
109 | ||
110 | .data : | |
111 | { | |
112 | __DATA_START = .; | |
113 | *(.data_4) *(.data_2) *(.data_1) *(.data) *(.data.*) *(.gnu.linkonce.d.*) | |
114 | __DATA_END = .; | |
115 | } > ram AT > rom | |
116 | ||
117 | .bss (NOLOAD) : | |
118 | { | |
119 | __BSS_START = .; | |
120 | *(.bss_4) *(.bss_2) *(.bss_1) *(.bss) *(COMMON) *(.bss.*) *(.gnu.linkonce.b.*) | |
121 | __BSS_END = .; | |
122 | } > ram | |
123 | ||
124 | /* You may change the sizes of the following sections to fit the actual | |
125 | size your program requires. | |
126 | ||
127 | The heap and stack are aligned to the bus width, as a speed optimization | |
128 | for accessing data located there. */ | |
129 | ||
7ba29e2a | 130 | .heap (NOLOAD) : |
3d3d428f NC |
131 | { |
132 | . = ALIGN(4); | |
133 | __HEAP_START = .; | |
134 | . += 0x2000; __HEAP_MAX = .; | |
135 | } > ram | |
136 | ||
7ba29e2a | 137 | .stack (NOLOAD) : |
3d3d428f NC |
138 | { |
139 | . = ALIGN(4); | |
140 | . += 0x6000; | |
141 | __STACK_START = .; | |
142 | } > ram | |
143 | ||
7ba29e2a | 144 | .istack (NOLOAD) : |
3d3d428f NC |
145 | { |
146 | . = ALIGN(4); | |
147 | . += 0x100; | |
148 | __ISTACK_START = .; | |
149 | } > ram | |
150 | ||
151 | .comment 0 : { *(.comment) } | |
152 | ||
153 | /* DWARF debug sections. | |
154 | Symbols in the DWARF debugging sections are relative to the beginning | |
155 | of the section so we begin them at 0. */ | |
156 | ||
09b910c6 AM |
157 | .debug_aranges 0 : { *(.debug_aranges) } |
158 | .debug_pubnames 0 : { *(.debug_pubnames) } | |
159 | .debug_info 0 : { *(.debug_info .gnu.linkonce.wi.*) } | |
160 | .debug_abbrev 0 : { *(.debug_abbrev) } | |
161 | .debug_line 0 : { *(.debug_line) } | |
162 | .debug_frame 0 : { *(.debug_frame) } | |
163 | .debug_str 0 : { *(.debug_str) } | |
164 | .debug_loc 0 : { *(.debug_loc) } | |
165 | .debug_macinfo 0 : { *(.debug_macinfo) } | |
2a995fc1 NC |
166 | |
167 | /* DWARF 3 */ | |
168 | .debug_pubtypes 0 : { *(.debug_pubtypes) } | |
169 | .debug_ranges 0 : { *(.debug_ranges) } | |
170 | ||
171 | /* DWARF Extension. */ | |
172 | .debug_macro 0 : { *(.debug_macro) } | |
3d3d428f NC |
173 | } |
174 | ||
175 | __DATA_IMAGE_START = LOADADDR(.data); | |
176 | EOF |