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1fe1f39c NC |
1 | # Linker Script for National Semiconductor's CRX-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 "$ENTRY" && ENTRY=_start | |
9 | cat <<EOF | |
10 | ||
11 | /* Example Linker Script for linking NS CRX elf32 files. */ | |
12 | ||
1fe1f39c NC |
13 | OUTPUT_FORMAT("${OUTPUT_FORMAT}") |
14 | OUTPUT_ARCH(${ARCH}) | |
ec2d9b29 | 15 | ${RELOCATING+ENTRY(${ENTRY})} |
1fe1f39c NC |
16 | |
17 | /* Define memory regions. */ | |
18 | MEMORY | |
19 | { | |
20 | rom : ORIGIN = 0x2, LENGTH = 3M | |
21 | ram : ORIGIN = 4M, LENGTH = 10M | |
22 | } | |
23 | ||
42851540 NC |
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 | ||
1fe1f39c NC |
39 | SECTIONS |
40 | { | |
42851540 NC |
41 | .init : |
42 | { | |
43 | __INIT_START = .; | |
1fa32646 | 44 | KEEP (*(.init)) |
42851540 NC |
45 | __INIT_END = .; |
46 | } > rom | |
47 | ||
48 | .fini : | |
49 | { | |
50 | __FINI_START = .; | |
1fa32646 | 51 | KEEP (*(.fini)) |
42851540 NC |
52 | __FINI_END = .; |
53 | } > rom | |
54 | ||
55 | .jcr : | |
56 | { | |
1fa32646 | 57 | KEEP (*(.jcr)) |
42851540 NC |
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 = .; | |
b7309ada | 70 | *(.rdata_4) *(.rdata_2) *(.rdata_1) *(.rdata.*) *(.gnu.linkonce.r.*) *(.rodata.*) |
42851540 NC |
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 | ||
40cf2291 AM |
87 | KEEP (*crtbegin.o(.ctors)) |
88 | KEEP (*crtbegin?.o(.ctors)) | |
89 | ||
42851540 NC |
90 | /* We don't want to include the .ctor section from |
91 | the crtend.o file until after the sorted ctors. | |
92 | The .ctor section from the crtend file contains the | |
93 | end of ctors marker and it must be last */ | |
94 | ||
40cf2291 | 95 | KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o) .ctors)) |
42851540 NC |
96 | KEEP (*(SORT(.ctors.*))) |
97 | KEEP (*(.ctors)) | |
98 | __CTOR_END = .; | |
99 | } > rom | |
100 | ||
101 | .dtor ALIGN(4) : | |
102 | { | |
103 | __DTOR_START = .; | |
40cf2291 AM |
104 | KEEP (*crtbegin.o(.dtors)) |
105 | KEEP (*crtbegin?.o(.dtors)) | |
106 | KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o) .dtors)) | |
42851540 NC |
107 | KEEP (*(SORT(.dtors.*))) |
108 | KEEP (*(.dtors)) | |
109 | __DTOR_END = .; | |
110 | } > rom | |
111 | ||
112 | .data : | |
113 | { | |
114 | __DATA_START = .; | |
115 | *(.data_4) *(.data_2) *(.data_1) *(.data) *(.data.*) *(.gnu.linkonce.d.*) | |
116 | __DATA_END = .; | |
117 | } > ram AT > rom | |
118 | ||
119 | .bss (NOLOAD) : | |
120 | { | |
121 | __BSS_START = .; | |
122 | *(.bss_4) *(.bss_2) *(.bss_1) *(.bss) *(COMMON) *(.bss.*) *(.gnu.linkonce.b.*) | |
123 | __BSS_END = .; | |
124 | } > ram | |
1fe1f39c NC |
125 | |
126 | /* You may change the sizes of the following sections to fit the actual | |
127 | size your program requires. | |
128 | ||
129 | The heap and stack are aligned to the bus width, as a speed optimization | |
130 | for accessing data located there. */ | |
131 | ||
7ba29e2a | 132 | .heap (NOLOAD) : |
42851540 NC |
133 | { |
134 | . = ALIGN(4); | |
135 | __HEAP_START = .; | |
136 | . += 0x2000; __HEAP_MAX = .; | |
137 | } > ram | |
138 | ||
7ba29e2a | 139 | .stack (NOLOAD) : |
42851540 NC |
140 | { |
141 | . = ALIGN(4); | |
142 | . += 0x6000; | |
143 | __STACK_START = .; | |
144 | } > ram | |
145 | ||
7ba29e2a | 146 | .istack (NOLOAD) : |
42851540 NC |
147 | { |
148 | . = ALIGN(4); | |
149 | . += 0x100; | |
150 | __ISTACK_START = .; | |
151 | } > ram | |
152 | ||
153 | .comment 0 : { *(.comment) } | |
154 | ||
155 | /* DWARF debug sections. | |
156 | Symbols in the DWARF debugging sections are relative to the beginning | |
157 | of the section so we begin them at 0. */ | |
158 | ||
09b910c6 AM |
159 | .debug_aranges 0 : { *(.debug_aranges) } |
160 | .debug_pubnames 0 : { *(.debug_pubnames) } | |
161 | .debug_info 0 : { *(.debug_info .gnu.linkonce.wi.*) } | |
162 | .debug_abbrev 0 : { *(.debug_abbrev) } | |
163 | .debug_line 0 : { *(.debug_line) } | |
164 | .debug_frame 0 : { *(.debug_frame) } | |
165 | .debug_str 0 : { *(.debug_str) } | |
166 | .debug_loc 0 : { *(.debug_loc) } | |
167 | .debug_macinfo 0 : { *(.debug_macinfo) } | |
1fe1f39c NC |
168 | } |
169 | ||
170 | __DATA_IMAGE_START = LOADADDR(.data); | |
171 | EOF |