Commit | Line | Data |
---|---|---|
b4477fa8 NC |
1 | # |
2 | # Unusual variables checked by this code: | |
3 | # NOP - four byte opcode for no-op (defaults to 0) | |
4 | # NO_SMALL_DATA - no .sbss/.sbss2/.sdata/.sdata2 sections if not | |
5 | # empty. | |
6 | # DATA_ADDR - if end-of-text-plus-one-page isn't right for data start | |
7 | # INITIAL_READONLY_SECTIONS - at start of text segment | |
8 | # OTHER_READONLY_SECTIONS - other than .text .init .rodata ... | |
9 | # (e.g., .PARISC.milli) | |
10 | # OTHER_TEXT_SECTIONS - these get put in .text when relocating | |
11 | # OTHER_READWRITE_SECTIONS - other than .data .bss .ctors .sdata ... | |
12 | # (e.g., .PARISC.global) | |
13 | # OTHER_BSS_SECTIONS - other than .bss .sbss ... | |
14 | # OTHER_SECTIONS - at the end | |
15 | # EXECUTABLE_SYMBOLS - symbols that must be defined for an | |
16 | # executable (e.g., _DYNAMIC_LINK) | |
17 | # TEXT_START_SYMBOLS - symbols that appear at the start of the | |
18 | # .text section. | |
19 | # DATA_START_SYMBOLS - symbols that appear at the start of the | |
20 | # .data section. | |
21 | # OTHER_GOT_SYMBOLS - symbols defined just before .got. | |
22 | # OTHER_GOT_SECTIONS - sections just after .got. | |
23 | # OTHER_SDATA_SECTIONS - sections just after .sdata. | |
24 | # OTHER_BSS_SYMBOLS - symbols that appear at the start of the | |
25 | # .bss section besides __bss_start. | |
26 | # DATA_PLT - .plt should be in data segment, not text segment. | |
27 | # BSS_PLT - .plt should be in bss segment | |
28 | # TEXT_DYNAMIC - .dynamic in text segment, not data segment. | |
29 | # EMBEDDED - whether this is for an embedded system. | |
30 | # SHLIB_TEXT_START_ADDR - if set, add to SIZEOF_HEADERS to set | |
31 | # start address of shared library. | |
32 | # INPUT_FILES - INPUT command of files to always include | |
33 | # WRITABLE_RODATA - if set, the .rodata section should be writable | |
34 | # INIT_START, INIT_END - statements just before and just after | |
35 | # combination of .init sections. | |
36 | # FINI_START, FINI_END - statements just before and just after | |
37 | # combination of .fini sections. | |
38 | # STACK_ADDR - start of a .stack section. | |
39 | # OTHER_END_SYMBOLS - symbols to place right at the end of the script. | |
40 | # | |
41 | # When adding sections, do note that the names of some sections are used | |
42 | # when specifying the start address of the next. | |
43 | # | |
44 | ||
45 | # Many sections come in three flavours. There is the 'real' section, | |
46 | # like ".data". Then there are the per-procedure or per-variable | |
47 | # sections, generated by -ffunction-sections and -fdata-sections in GCC, | |
48 | # and useful for --gc-sections, which for a variable "foo" might be | |
49 | # ".data.foo". Then there are the linkonce sections, for which the linker | |
50 | # eliminates duplicates, which are named like ".gnu.linkonce.d.foo". | |
51 | # The exact correspondences are: | |
52 | # | |
53 | # Section Linkonce section | |
54 | # .text .gnu.linkonce.t.foo | |
55 | # .rodata .gnu.linkonce.r.foo | |
56 | # .data .gnu.linkonce.d.foo | |
57 | # .bss .gnu.linkonce.b.foo | |
58 | # .sdata .gnu.linkonce.s.foo | |
59 | # .sbss .gnu.linkonce.sb.foo | |
60 | # .sdata2 .gnu.linkonce.s2.foo | |
61 | # .sbss2 .gnu.linkonce.sb2.foo | |
62 | # .debug_info .gnu.linkonce.wi.foo | |
63 | # | |
64 | # Each of these can also have corresponding .rel.* and .rela.* sections. | |
65 | ||
66 | test -z "$ENTRY" && ENTRY=_start | |
67 | test -z "${BIG_OUTPUT_FORMAT}" && BIG_OUTPUT_FORMAT=${OUTPUT_FORMAT} | |
68 | test -z "${LITTLE_OUTPUT_FORMAT}" && LITTLE_OUTPUT_FORMAT=${OUTPUT_FORMAT} | |
69 | if [ -z "$MACHINE" ]; then OUTPUT_ARCH=${ARCH}; else OUTPUT_ARCH=${ARCH}:${MACHINE}; fi | |
70 | test -z "${ELFSIZE}" && ELFSIZE=32 | |
71 | test -z "${ALIGNMENT}" && ALIGNMENT="${ELFSIZE} / 8" | |
72 | test "$LD_FLAG" = "N" && DATA_ADDR=. | |
73 | INTERP=".interp ${RELOCATING-0} : { *(.interp) }" | |
74 | PLT=".plt ${RELOCATING-0} : { *(.plt) }" | |
75 | DYNAMIC=".dynamic ${RELOCATING-0} : { *(.dynamic) }" | |
76 | RODATA=".rodata ${RELOCATING-0} : { *(.rodata${RELOCATING+ .rodata.* .gnu.linkonce.r.*}) }" | |
77 | if test -z "${NO_SMALL_DATA}"; then | |
78 | SBSS=".sbss ${RELOCATING-0} : | |
79 | { | |
80 | ${RELOCATING+PROVIDE (__sbss_start = .);} | |
81 | ${RELOCATING+PROVIDE (___sbss_start = .);} | |
82 | *(.dynsbss) | |
83 | *(.sbss${RELOCATING+ .sbss.* .gnu.linkonce.sb.*}) | |
84 | *(.scommon) | |
85 | ${RELOCATING+PROVIDE (__sbss_end = .);} | |
86 | ${RELOCATING+PROVIDE (___sbss_end = .);} | |
87 | }" | |
88 | SBSS2=".sbss2 ${RELOCATING-0} : { *(.sbss2${RELOCATING+ .sbss2.* .gnu.linkonce.sb2.*}) }" | |
89 | SDATA="/* We want the small data sections together, so single-instruction offsets | |
90 | can access them all, and initialized data all before uninitialized, so | |
91 | we can shorten the on-disk segment size. */ | |
92 | .sdata ${RELOCATING-0} : | |
93 | { | |
94 | ${RELOCATING+${SDATA_START_SYMBOLS}} | |
95 | *(.sdata${RELOCATING+ .sdata.* .gnu.linkonce.s.*}) | |
96 | }" | |
97 | SDATA2=".sdata2 ${RELOCATING-0} : { *(.sdata2${RELOCATING+ .sdata2.* .gnu.linkonce.s2.*}) }" | |
98 | REL_SDATA=".rel.sdata ${RELOCATING-0} : { *(.rel.sdata${RELOCATING+ .rel.sdata.* .rel.gnu.linkonce.s.*}) } | |
99 | .rela.sdata ${RELOCATING-0} : { *(.rela.sdata${RELOCATING+ .rela.sdata.* .rela.gnu.linkonce.s.*}) }" | |
100 | REL_SBSS=".rel.sbss ${RELOCATING-0} : { *(.rel.sbss${RELOCATING+ .rel.sbss.* .rel.gnu.linkonce.sb.*}) } | |
101 | .rela.sbss ${RELOCATING-0} : { *(.rela.sbss${RELOCATING+ .rela.sbss.* .rela.gnu.linkonce.sb.*}) }" | |
102 | REL_SDATA2=".rel.sdata2 ${RELOCATING-0} : { *(.rel.sdata2${RELOCATING+ .rel.sdata2.* .rel.gnu.linkonce.s2.*}) } | |
103 | .rela.sdata2 ${RELOCATING-0} : { *(.rela.sdata2${RELOCATING+ .rela.sdata2.* .rela.gnu.linkonce.s2.*}) }" | |
104 | REL_SBSS2=".rel.sbss2 ${RELOCATING-0} : { *(.rel.sbss2${RELOCATING+ .rel.sbss2.* .rel.gnu.linkonce.sb2.*}) } | |
105 | .rela.sbss2 ${RELOCATING-0} : { *(.rela.sbss2${RELOCATING+ .rela.sbss2.* .rela.gnu.linkonce.sb2.*}) }" | |
106 | fi | |
107 | CTOR=" | |
108 | ${CONSTRUCTING+${CTOR_START}} | |
109 | /* gcc uses crtbegin.o to find the start of | |
110 | the constructors, so we make sure it is | |
111 | first. Because this is a wildcard, it | |
112 | doesn't matter if the user does not | |
113 | actually link against crtbegin.o; the | |
114 | linker won't look for a file to match a | |
115 | wildcard. The wildcard also means that it | |
116 | doesn't matter which directory crtbegin.o | |
117 | is in. */ | |
118 | ||
877d60f7 | 119 | KEEP (*crtbegin*.o(.ctors)) |
b4477fa8 NC |
120 | |
121 | /* We don't want to include the .ctor section from | |
122 | from the crtend.o file until after the sorted ctors. | |
123 | The .ctor section from the crtend file contains the | |
124 | end of ctors marker and it must be last */ | |
125 | ||
877d60f7 | 126 | KEEP (*(EXCLUDE_FILE (*crtend*.o $OTHER_EXCLUDE_FILES) .ctors)) |
b4477fa8 NC |
127 | KEEP (*(SORT(.ctors.*))) |
128 | KEEP (*(.ctors)) | |
129 | ${CONSTRUCTING+${CTOR_END}} | |
130 | " | |
131 | DTOR=" | |
132 | ${CONSTRUCTING+${DTOR_START}} | |
877d60f7 AM |
133 | KEEP (*crtbegin*.o(.dtors)) |
134 | KEEP (*(EXCLUDE_FILE (*crtend*.o $OTHER_EXCLUDE_FILES) .dtors)) | |
b4477fa8 NC |
135 | KEEP (*(SORT(.dtors.*))) |
136 | KEEP (*(.dtors)) | |
137 | ${CONSTRUCTING+${DTOR_END}} | |
138 | " | |
139 | STACK=" .stack ${RELOCATING-0}${RELOCATING+${STACK_ADDR}} : | |
140 | { | |
141 | ${RELOCATING+_stack = .;} | |
142 | *(.stack) | |
143 | }" | |
144 | ||
145 | test -z "${TEXT_BASE_ADDRESS}" && TEXT_BASE_ADDRESS="${TEXT_START_ADDR}" | |
146 | ||
147 | cat <<EOF | |
148 | OUTPUT_FORMAT("${OUTPUT_FORMAT}", "${BIG_OUTPUT_FORMAT}", | |
149 | "${LITTLE_OUTPUT_FORMAT}") | |
150 | OUTPUT_ARCH(${OUTPUT_ARCH}) | |
151 | ENTRY(${ENTRY}) | |
152 | ||
153 | ${RELOCATING+${LIB_SEARCH_DIRS}} | |
154 | ${RELOCATING+/* Do we need any of these for elf? | |
155 | __DYNAMIC = 0; ${STACKZERO+${STACKZERO}} ${SHLIB_PATH+${SHLIB_PATH}} */} | |
156 | ${RELOCATING+${EXECUTABLE_SYMBOLS}} | |
157 | ${RELOCATING+${INPUT_FILES}} | |
158 | ${RELOCATING- /* For some reason, the Solaris linker makes bad executables | |
159 | if gld -r is used and the intermediate file has sections starting | |
160 | at non-zero addresses. Could be a Solaris ld bug, could be a GNU ld | |
161 | bug. But for now assigning the zero vmas works. */} | |
162 | ||
163 | SECTIONS | |
164 | { | |
165 | /* Read-only sections, merged into text segment: */ | |
166 | ${CREATE_SHLIB-${RELOCATING+. = ${TEXT_BASE_ADDRESS};}} | |
167 | ${CREATE_SHLIB+${RELOCATING+. = ${SHLIB_TEXT_START_ADDR:-0};}} | |
168 | ${CREATE_SHLIB-${INTERP}} | |
169 | ${INITIAL_READONLY_SECTIONS} | |
170 | ${TEXT_DYNAMIC+${DYNAMIC}} | |
171 | .hash ${RELOCATING-0} : { *(.hash) } | |
172 | .dynsym ${RELOCATING-0} : { *(.dynsym) } | |
173 | .dynstr ${RELOCATING-0} : { *(.dynstr) } | |
174 | .gnu.version ${RELOCATING-0} : { *(.gnu.version) } | |
175 | .gnu.version_d ${RELOCATING-0}: { *(.gnu.version_d) } | |
176 | .gnu.version_r ${RELOCATING-0}: { *(.gnu.version_r) } | |
177 | ||
178 | EOF | |
179 | if [ "x$COMBRELOC" = x ]; then | |
180 | COMBRELOCCAT=cat | |
181 | else | |
182 | COMBRELOCCAT="cat > $COMBRELOC" | |
183 | fi | |
184 | eval $COMBRELOCCAT <<EOF | |
185 | .rel.init ${RELOCATING-0} : { *(.rel.init) } | |
186 | .rela.init ${RELOCATING-0} : { *(.rela.init) } | |
187 | .rel.text ${RELOCATING-0} : { *(.rel.text${RELOCATING+ .rel.text.* .rel.gnu.linkonce.t.*}) } | |
188 | .rela.text ${RELOCATING-0} : { *(.rela.text${RELOCATING+ .rela.text.* .rela.gnu.linkonce.t.*}) } | |
189 | .rel.fini ${RELOCATING-0} : { *(.rel.fini) } | |
190 | .rela.fini ${RELOCATING-0} : { *(.rela.fini) } | |
191 | .rel.rodata ${RELOCATING-0} : { *(.rel.rodata${RELOCATING+ .rel.rodata.* .rel.gnu.linkonce.r.*}) } | |
192 | .rela.rodata ${RELOCATING-0} : { *(.rela.rodata${RELOCATING+ .rela.rodata.* .rela.gnu.linkonce.r.*}) } | |
193 | ${OTHER_READONLY_RELOC_SECTIONS} | |
194 | .rel.data ${RELOCATING-0} : { *(.rel.data${RELOCATING+ .rel.data.* .rel.gnu.linkonce.d.*}) } | |
195 | .rela.data ${RELOCATING-0} : { *(.rela.data${RELOCATING+ .rela.data.* .rela.gnu.linkonce.d.*}) } | |
196 | .rel.ctors ${RELOCATING-0} : { *(.rel.ctors) } | |
197 | .rela.ctors ${RELOCATING-0} : { *(.rela.ctors) } | |
198 | .rel.dtors ${RELOCATING-0} : { *(.rel.dtors) } | |
199 | .rela.dtors ${RELOCATING-0} : { *(.rela.dtors) } | |
200 | .rel.got ${RELOCATING-0} : { *(.rel.got) } | |
201 | .rela.got ${RELOCATING-0} : { *(.rela.got) } | |
202 | ${OTHER_GOT_RELOC_SECTIONS} | |
203 | ${REL_SDATA} | |
204 | ${REL_SBSS} | |
205 | ${REL_SDATA2} | |
206 | ${REL_SBSS2} | |
207 | .rel.bss ${RELOCATING-0} : { *(.rel.bss${RELOCATING+ .rel.bss.* .rel.gnu.linkonce.b.*}) } | |
208 | .rela.bss ${RELOCATING-0} : { *(.rela.bss${RELOCATING+ .rela.bss.* .rela.gnu.linkonce.b.*}) } | |
209 | EOF | |
210 | if [ -n "$COMBRELOC" ]; then | |
211 | cat <<EOF | |
212 | .rel.dyn ${RELOCATING-0} : | |
213 | { | |
214 | EOF | |
215 | sed -e '/^[ ]*[{}][ ]*$/d;/:[ ]*$/d;/\.rela\./d;s/^.*: { *\(.*\)}$/ \1/' $COMBRELOC | |
216 | cat <<EOF | |
217 | } | |
218 | .rela.dyn ${RELOCATING-0} : | |
219 | { | |
220 | EOF | |
221 | sed -e '/^[ ]*[{}][ ]*$/d;/:[ ]*$/d;/\.rel\./d;s/^.*: { *\(.*\)}/ \1/' $COMBRELOC | |
222 | cat <<EOF | |
223 | } | |
224 | EOF | |
225 | fi | |
226 | cat <<EOF | |
227 | . = ALIGN(0x1000); | |
228 | .rel.plt ${RELOCATING-0} : { *(.rel.plt) } | |
229 | .rela.plt ${RELOCATING-0} : { *(.rela.plt) } | |
230 | ${OTHER_PLT_RELOC_SECTIONS} | |
231 | ${DATA_PLT-${BSS_PLT-${PLT}}} | |
232 | .text ${RELOCATING-0} : | |
233 | { | |
234 | ${RELOCATING+${TEXT_START_SYMBOLS}} | |
235 | *(.text .stub${RELOCATING+ .text.* .gnu.linkonce.t.*}) | |
236 | /* .gnu.warning sections are handled specially by elf32.em. */ | |
237 | *(.gnu.warning) | |
238 | ${RELOCATING+${OTHER_TEXT_SECTIONS}} | |
239 | } =${NOP-0} | |
240 | .fini ${RELOCATING-0} : | |
241 | { | |
242 | ${RELOCATING+${FINI_START}} | |
243 | KEEP (*(.fini)) | |
244 | ${RELOCATING+${FINI_END}} | |
245 | } =${NOP-0} | |
246 | ${RELOCATING+PROVIDE (__etext = .);} | |
247 | ${RELOCATING+PROVIDE (_etext = .);} | |
248 | ${RELOCATING+PROVIDE (etext = .);} | |
249 | . = ALIGN(0x1000); | |
250 | ${CREATE_SHLIB-${SDATA2}} | |
251 | ${CREATE_SHLIB-${SBSS2}} | |
252 | ${OTHER_READONLY_SECTIONS} | |
253 | .eh_frame_hdr : { *(.eh_frame_hdr) } | |
254 | ||
255 | . = ALIGN(0x1000); | |
256 | .data ${RELOCATING-0} : | |
257 | { | |
258 | *(.rodata .rodata.*) | |
259 | *(.rodata1) | |
260 | *(.gnu.linkonce.r.*) | |
261 | ${RELOCATING+${DATA_START_SYMBOLS}} | |
262 | *(.data${RELOCATING+ .data.* .gnu.linkonce.d.*}) | |
263 | ${CONSTRUCTING+SORT(CONSTRUCTORS)} | |
264 | KEEP (*(.eh_frame)) | |
265 | *(.gcc_except_table) | |
266 | ${CTOR} | |
267 | ${DTOR} | |
268 | KEEP (*(.jcr)) | |
269 | } | |
270 | .data1 ${RELOCATING-0} : { *(.data1) } | |
271 | . = ALIGN(0x1000); | |
272 | .gcc_except_table ${RELOCATING-0} : { *(.gcc_except_table) } | |
273 | ${WRITABLE_RODATA+${RODATA}} | |
274 | ${OTHER_READWRITE_SECTIONS} | |
275 | ${TEXT_DYNAMIC-${DYNAMIC}} | |
276 | ${DATA_PLT+${PLT}} | |
277 | ${RELOCATING+${OTHER_GOT_SYMBOLS}} | |
278 | .got ${RELOCATING-0} : { *(.got.plt) *(.got) } | |
279 | ${OTHER_GOT_SECTIONS} | |
280 | ${CREATE_SHLIB+${SDATA2}} | |
281 | ${CREATE_SHLIB+${SBSS2}} | |
282 | ${SDATA} | |
283 | ${OTHER_SDATA_SECTIONS} | |
284 | ${RELOCATING+_edata = .;} | |
285 | ${RELOCATING+PROVIDE (edata = .);} | |
286 | ${RELOCATING+__bss_start = .;} | |
287 | ${RELOCATING+${OTHER_BSS_SYMBOLS}} | |
288 | ${SBSS} | |
289 | ${BSS_PLT+${PLT}} | |
290 | . = ALIGN(0x1000); | |
291 | .bss ${RELOCATING-0} : | |
292 | { | |
293 | *(.dynbss) | |
294 | *(.bss${RELOCATING+ .bss.* .gnu.linkonce.b.*}) | |
295 | *(COMMON) | |
296 | /* Align here to ensure that the .bss section occupies space up to | |
297 | _end. Align after .bss to ensure correct alignment even if the | |
298 | .bss section disappears because there are no input sections. */ | |
299 | ${RELOCATING+. = ALIGN(${ALIGNMENT});} | |
300 | } | |
301 | ${OTHER_BSS_SECTIONS} | |
302 | ${RELOCATING+. = ALIGN(${ALIGNMENT});} | |
303 | ${RELOCATING+_end = .;} | |
304 | ${RELOCATING+${OTHER_BSS_END_SYMBOLS}} | |
305 | ${RELOCATING+PROVIDE (end = .);} | |
306 | ||
307 | /* Stabs debugging sections. */ | |
308 | . = ALIGN(0x1000); | |
309 | .stab 0 : { *(.stab) } | |
310 | .stabstr 0 : { *(.stabstr) } | |
311 | .stab.excl 0 : { *(.stab.excl) } | |
312 | .stab.exclstr 0 : { *(.stab.exclstr) } | |
313 | .stab.index 0 : { *(.stab.index) } | |
314 | .stab.indexstr 0 : { *(.stab.indexstr) } | |
315 | ||
316 | . = ALIGN(0x1000); | |
317 | .comment 0 : { *(.comment) } | |
318 | ||
319 | /* DWARF debug sections. | |
320 | Symbols in the DWARF debugging sections are relative to the beginning | |
321 | of the section so we begin them at 0. */ | |
322 | ||
323 | /* DWARF 1 */ | |
324 | .debug 0 : { *(.debug) } | |
325 | .line 0 : { *(.line) } | |
326 | ||
327 | /* GNU DWARF 1 extensions */ | |
328 | .debug_srcinfo 0 : { *(.debug_srcinfo) } | |
329 | .debug_sfnames 0 : { *(.debug_sfnames) } | |
330 | ||
331 | /* DWARF 1.1 and DWARF 2 */ | |
332 | .debug_aranges 0 : { *(.debug_aranges) } | |
333 | .debug_pubnames 0 : { *(.debug_pubnames) } | |
334 | ||
335 | /* DWARF 2 */ | |
336 | .debug_info 0 : { *(.debug_info .gnu.linkonce.wi.*) } | |
337 | .debug_abbrev 0 : { *(.debug_abbrev) } | |
338 | .debug_line 0 : { *(.debug_line) } | |
339 | .debug_frame 0 : { *(.debug_frame) } | |
340 | .debug_str 0 : { *(.debug_str) } | |
341 | .debug_loc 0 : { *(.debug_loc) } | |
342 | .debug_macinfo 0 : { *(.debug_macinfo) } | |
343 | ||
344 | /* SGI/MIPS DWARF 2 extensions */ | |
345 | .debug_weaknames 0 : { *(.debug_weaknames) } | |
346 | .debug_funcnames 0 : { *(.debug_funcnames) } | |
347 | .debug_typenames 0 : { *(.debug_typenames) } | |
348 | .debug_varnames 0 : { *(.debug_varnames) } | |
349 | ||
350 | ${STACK_ADDR+${STACK}} | |
351 | ${OTHER_SECTIONS} | |
352 | ${RELOCATING+${OTHER_END_SYMBOLS}} | |
353 | } | |
354 | EOF |