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93fbbb04 GK |
1 | # |
2 | # Unusual variables checked by this code: | |
3 | # NOP - two byte opcode for no-op (defaults to 0) | |
4 | # INITIAL_READONLY_SECTIONS - at start of text segment | |
5 | # OTHER_READONLY_SECTIONS - other than .text .init .rodata ... | |
6 | # (e.g., .PARISC.milli) | |
7 | # OTHER_TEXT_SECTIONS - these get put in .text when relocating | |
8 | # OTHER_READWRITE_SECTIONS - other than .data .bss .ctors .sdata ... | |
9 | # (e.g., .PARISC.global) | |
93fbbb04 GK |
10 | # OTHER_SECTIONS - at the end |
11 | # EXECUTABLE_SYMBOLS - symbols that must be defined for an | |
12 | # executable (e.g., _DYNAMIC_LINK) | |
13 | # TEXT_START_SYMBOLS - symbols that appear at the start of the | |
14 | # .text section. | |
15 | # DATA_START_SYMBOLS - symbols that appear at the start of the | |
16 | # .data section. | |
17 | # OTHER_GOT_SYMBOLS - symbols defined just before .got. | |
18 | # OTHER_GOT_SECTIONS - sections just after .got and .sdata. | |
19 | # OTHER_BSS_SYMBOLS - symbols that appear at the start of the | |
20 | # .bss section besides __bss_start. | |
21 | # INPUT_FILES - INPUT command of files to always include | |
22 | # INIT_START, INIT_END - statements just before and just after | |
23 | # combination of .init sections. | |
24 | # FINI_START, FINI_END - statements just before and just after | |
25 | # combination of .fini sections. | |
26 | # | |
27 | # When adding sections, do note that the names of some sections are used | |
28 | # when specifying the start address of the next. | |
29 | # | |
30 | ||
31 | # Many sections come in three flavours. There is the 'real' section, | |
32 | # like ".data". Then there are the per-procedure or per-variable | |
33 | # sections, generated by -ffunction-sections and -fdata-sections in GCC, | |
34 | # and useful for --gc-sections, which for a variable "foo" might be | |
35 | # ".data.foo". Then there are the linkonce sections, for which the linker | |
36 | # eliminates duplicates, which are named like ".gnu.linkonce.d.foo". | |
37 | # The exact correspondences are: | |
38 | # | |
39 | # Section Linkonce section | |
40 | # .text .gnu.linkonce.t.foo | |
41 | # .rodata .gnu.linkonce.r.foo | |
42 | # .data .gnu.linkonce.d.foo | |
43 | # .bss .gnu.linkonce.b.foo | |
44 | # .sdata .gnu.linkonce.s.foo | |
45 | # .sbss .gnu.linkonce.sb.foo | |
46 | # .sdata2 .gnu.linkonce.s2.foo | |
47 | # .sbss2 .gnu.linkonce.sb2.foo | |
48 | # | |
49 | # Each of these can also have corresponding .rel.* and .rela.* sections. | |
50 | ||
51 | test -z "$ENTRY" && ENTRY=_start | |
52 | test -z "${BIG_OUTPUT_FORMAT}" && BIG_OUTPUT_FORMAT=${OUTPUT_FORMAT} | |
53 | test -z "${LITTLE_OUTPUT_FORMAT}" && LITTLE_OUTPUT_FORMAT=${OUTPUT_FORMAT} | |
54 | if [ -z "$MACHINE" ]; then OUTPUT_ARCH=${ARCH}; else OUTPUT_ARCH=${ARCH}:${MACHINE}; fi | |
55 | test -z "${ELFSIZE}" && ELFSIZE=32 | |
56 | test -z "${ALIGNMENT}" && ALIGNMENT="${ELFSIZE} / 8" | |
57 | CTOR=".ctors ${CONSTRUCTING-0} : | |
58 | { | |
59 | ${CONSTRUCTING+${CTOR_START}} | |
60 | /* gcc uses crtbegin.o to find the start of | |
61 | the constructors, so we make sure it is | |
62 | first. Because this is a wildcard, it | |
63 | doesn't matter if the user does not | |
64 | actually link against crtbegin.o; the | |
65 | linker won't look for a file to match a | |
66 | wildcard. The wildcard also means that it | |
67 | doesn't matter which directory crtbegin.o | |
68 | is in. */ | |
69 | ||
40cf2291 AM |
70 | KEEP (*crtbegin.o(.ctors)) |
71 | KEEP (*crtbegin?.o(.ctors)) | |
93fbbb04 GK |
72 | |
73 | /* We don't want to include the .ctor section from | |
bd6791bc | 74 | the crtend.o file until after the sorted ctors. |
93fbbb04 GK |
75 | The .ctor section from the crtend file contains the |
76 | end of ctors marker and it must be last */ | |
77 | ||
40cf2291 | 78 | KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o $OTHER_EXCLUDE_FILES) .ctors)) |
93fbbb04 GK |
79 | KEEP (*(SORT(.ctors.*))) |
80 | KEEP (*(.ctors)) | |
81 | ${CONSTRUCTING+${CTOR_END}} | |
82 | } > ROM" | |
83 | ||
84 | DTOR=" .dtors ${CONSTRUCTING-0} : | |
85 | { | |
86 | ${CONSTRUCTING+${DTOR_START}} | |
40cf2291 AM |
87 | KEEP (*crtbegin.o(.dtors)) |
88 | KEEP (*crtbegin?.o(.dtors)) | |
89 | KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o $OTHER_EXCLUDE_FILES) .dtors)) | |
93fbbb04 GK |
90 | KEEP (*(SORT(.dtors.*))) |
91 | KEEP (*(.dtors)) | |
92 | ${CONSTRUCTING+${DTOR_END}} | |
93 | } > ROM" | |
94 | ||
95 | cat <<EOF | |
96 | OUTPUT_FORMAT("${OUTPUT_FORMAT}", "${BIG_OUTPUT_FORMAT}", | |
97 | "${LITTLE_OUTPUT_FORMAT}") | |
98 | OUTPUT_ARCH(${OUTPUT_ARCH}) | |
b34c1498 | 99 | ${RELOCATING+ENTRY(${ENTRY})} |
93fbbb04 GK |
100 | |
101 | ${RELOCATING+${LIB_SEARCH_DIRS}} | |
102 | ${RELOCATING+${EXECUTABLE_SYMBOLS}} | |
103 | ${RELOCATING+${INPUT_FILES}} | |
104 | ${RELOCATING- /* For some reason, the Solaris linker makes bad executables | |
105 | if gld -r is used and the intermediate file has sections starting | |
106 | at non-zero addresses. Could be a Solaris ld bug, could be a GNU ld | |
107 | bug. But for now assigning the zero vmas works. */} | |
108 | ||
109 | /* There are two memory regions we care about, one from 0 through 0x7F00 | |
110 | that is RAM and one from 0x8000 up which is ROM. */ | |
111 | MEMORY | |
112 | { | |
113 | RAM (w) : ORIGIN = 0, LENGTH = 0x7F00 | |
114 | ROM (!w) : ORIGIN = 0x8000, LENGTH = 0xFF8000 | |
115 | } | |
116 | ||
117 | SECTIONS | |
118 | { | |
119 | .data ${RELOCATING-0} : | |
120 | { | |
517ed485 NC |
121 | ${RELOCATING+__rdata = .;} |
122 | ${RELOCATING+__data = .;} | |
93fbbb04 GK |
123 | ${RELOCATING+${DATA_START_SYMBOLS}} |
124 | *(.data) | |
125 | ${RELOCATING+*(.data.*)} | |
126 | ${RELOCATING+*(.gnu.linkonce.d.*)} | |
127 | ${CONSTRUCTING+SORT(CONSTRUCTORS)} | |
128 | } > RAM | |
129 | ${RELOCATING+${OTHER_READWRITE_SECTIONS}} | |
130 | ${RELOCATING+${OTHER_GOT_SYMBOLS}} | |
131 | ${RELOCATING+${OTHER_GOT_SECTIONS}} | |
132 | ${RELOCATING+_edata = .;} | |
133 | ${RELOCATING+PROVIDE (edata = .);} | |
134 | ${RELOCATING+__bss_start = .;} | |
135 | ${RELOCATING+${OTHER_BSS_SYMBOLS}} | |
136 | .bss ${RELOCATING-0} : | |
137 | { | |
138 | *(.dynbss) | |
139 | *(.bss) | |
140 | ${RELOCATING+*(.bss.*)} | |
141 | ${RELOCATING+*(.gnu.linkonce.b.*)} | |
142 | *(COMMON) | |
143 | /* Align here to ensure that the .bss section occupies space up to | |
144 | _end. Align after .bss to ensure correct alignment even if the | |
145 | .bss section disappears because there are no input sections. */ | |
146 | ${RELOCATING+. = ALIGN(${ALIGNMENT});} | |
147 | } > RAM | |
827a1c67 | 148 | ${RELOCATING+${OTHER_BSS_END_SYMBOLS}} |
93fbbb04 | 149 | ${RELOCATING+. = ALIGN(${ALIGNMENT});} |
827a1c67 | 150 | ${RELOCATING+${OTHER_END_SYMBOLS}} |
93fbbb04 | 151 | ${RELOCATING+_end = .;} |
da1f2fec | 152 | ${RELOCATING+__stack = .;} |
93fbbb04 GK |
153 | ${RELOCATING+PROVIDE (end = .);} |
154 | ||
155 | /* Read-only sections in ROM. */ | |
1ee7cf4c | 156 | .int_vec ${RELOCATING-0} : { *(.int_vec) } ${RELOCATING+> ROM} |
93fbbb04 | 157 | |
1ee7cf4c | 158 | .rodata ${RELOCATING-0} : { *(.rodata) ${RELOCATING+*(.rodata.*)} ${RELOCATING+*(.gnu.linkonce.r.*)} } ${RELOCATING+> ROM} |
93fbbb04 GK |
159 | ${RELOCATING+${CTOR}} |
160 | ${RELOCATING+${DTOR}} | |
1ee7cf4c NC |
161 | .jcr : { KEEP (*(.jcr)) } ${RELOCATING+> ROM} |
162 | .eh_frame : { KEEP (*(.eh_frame)) } ${RELOCATING+> ROM} | |
163 | .gcc_except_table : { *(.gcc_except_table) } ${RELOCATING+> ROM} | |
164 | .plt : { *(.plt) } ${RELOCATING+> ROM} | |
93fbbb04 GK |
165 | |
166 | .text ${RELOCATING-0} : | |
167 | { | |
168 | ${RELOCATING+${TEXT_START_SYMBOLS}} | |
169 | *(.text) | |
170 | ${RELOCATING+*(.text.*)} | |
171 | *(.stub) | |
172 | /* .gnu.warning sections are handled specially by elf32.em. */ | |
173 | *(.gnu.warning) | |
174 | ${RELOCATING+*(.gnu.linkonce.t.*)} | |
175 | ${RELOCATING+${OTHER_TEXT_SECTIONS}} | |
1ee7cf4c | 176 | } ${RELOCATING+> ROM =${NOP-0}} |
93fbbb04 GK |
177 | .init ${RELOCATING-0} : |
178 | { | |
179 | ${RELOCATING+${INIT_START}} | |
180 | KEEP (*(.init)) | |
181 | ${RELOCATING+${INIT_END}} | |
1ee7cf4c | 182 | } ${RELOCATING+> ROM =${NOP-0}} |
93fbbb04 GK |
183 | .fini ${RELOCATING-0} : |
184 | { | |
185 | ${RELOCATING+${FINI_START}} | |
186 | KEEP (*(.fini)) | |
187 | ${RELOCATING+${FINI_END}} | |
1ee7cf4c | 188 | } ${RELOCATING+> ROM =${NOP-0}} |
93fbbb04 GK |
189 | ${RELOCATING+PROVIDE (__etext = .);} |
190 | ${RELOCATING+PROVIDE (_etext = .);} | |
191 | ${RELOCATING+PROVIDE (etext = .);} | |
192 | ${RELOCATING+${OTHER_READONLY_SECTIONS}} | |
193 | ||
194 | ||
195 | /* Stabs debugging sections. */ | |
196 | .stab 0 : { *(.stab) } | |
197 | .stabstr 0 : { *(.stabstr) } | |
198 | .stab.excl 0 : { *(.stab.excl) } | |
199 | .stab.exclstr 0 : { *(.stab.exclstr) } | |
200 | .stab.index 0 : { *(.stab.index) } | |
201 | .stab.indexstr 0 : { *(.stab.indexstr) } | |
202 | ||
203 | .comment 0 : { *(.comment) } | |
204 | ||
205 | /* DWARF debug sections. | |
206 | Symbols in the DWARF debugging sections are relative to the beginning | |
207 | of the section so we begin them at 0. */ | |
208 | ||
209 | /* DWARF 1 */ | |
210 | .debug 0 : { *(.debug) } | |
211 | .line 0 : { *(.line) } | |
212 | ||
213 | /* GNU DWARF 1 extensions */ | |
214 | .debug_srcinfo 0 : { *(.debug_srcinfo) } | |
215 | .debug_sfnames 0 : { *(.debug_sfnames) } | |
216 | ||
217 | /* DWARF 1.1 and DWARF 2 */ | |
218 | .debug_aranges 0 : { *(.debug_aranges) } | |
219 | .debug_pubnames 0 : { *(.debug_pubnames) } | |
220 | ||
221 | /* DWARF 2 */ | |
222 | .debug_info 0 : { *(.debug_info) *(.gnu.linkonce.wi.*) } | |
223 | .debug_abbrev 0 : { *(.debug_abbrev) } | |
224 | .debug_line 0 : { *(.debug_line) } | |
225 | .debug_frame 0 : { *(.debug_frame) } | |
226 | .debug_str 0 : { *(.debug_str) } | |
227 | .debug_loc 0 : { *(.debug_loc) } | |
228 | .debug_macinfo 0 : { *(.debug_macinfo) } | |
229 | ||
230 | /* SGI/MIPS DWARF 2 extensions */ | |
231 | .debug_weaknames 0 : { *(.debug_weaknames) } | |
232 | .debug_funcnames 0 : { *(.debug_funcnames) } | |
233 | .debug_typenames 0 : { *(.debug_typenames) } | |
234 | .debug_varnames 0 : { *(.debug_varnames) } | |
235 | ||
236 | ${RELOCATING+${OTHER_RELOCATING_SECTIONS}} | |
237 | ||
238 | /* These must appear regardless of ${RELOCATING}. */ | |
239 | ${OTHER_SECTIONS} | |
240 | } | |
241 | EOF |