bfd/
[deliverable/binutils-gdb.git] / ld / scripttempl / elf.sc
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 # .tdata .gnu.linkonce.td.foo
64 # .tbss .gnu.linkonce.tb.foo
65 #
66 # Each of these can also have corresponding .rel.* and .rela.* sections.
67
68 test -z "$ENTRY" && ENTRY=_start
69 test -z "${BIG_OUTPUT_FORMAT}" && BIG_OUTPUT_FORMAT=${OUTPUT_FORMAT}
70 test -z "${LITTLE_OUTPUT_FORMAT}" && LITTLE_OUTPUT_FORMAT=${OUTPUT_FORMAT}
71 if [ -z "$MACHINE" ]; then OUTPUT_ARCH=${ARCH}; else OUTPUT_ARCH=${ARCH}:${MACHINE}; fi
72 test -z "${ELFSIZE}" && ELFSIZE=32
73 test -z "${ALIGNMENT}" && ALIGNMENT="${ELFSIZE} / 8"
74 test "$LD_FLAG" = "N" && DATA_ADDR=.
75 test -n "$CREATE_SHLIB" && test -n "$SHLIB_DATA_ADDR" && COMMONPAGESIZE=""
76 test -z "$CREATE_SHLIB" && test -n "$DATA_ADDR" && COMMONPAGESIZE=""
77 DATA_SEGMENT_ALIGN="ALIGN(${SEGMENT_SIZE}) + (. & (${MAXPAGESIZE} - 1))"
78 DATA_SEGMENT_END=""
79 if test -n "${COMMONPAGESIZE}"; then
80 DATA_SEGMENT_ALIGN="ALIGN (${SEGMENT_SIZE}) - ((${MAXPAGESIZE} - .) & (${MAXPAGESIZE} - 1)); . = DATA_SEGMENT_ALIGN (${MAXPAGESIZE}, ${COMMONPAGESIZE})"
81 DATA_SEGMENT_END=". = DATA_SEGMENT_END (.);"
82 fi
83 INTERP=".interp ${RELOCATING-0} : { *(.interp) }"
84 PLT=".plt ${RELOCATING-0} : { *(.plt) }"
85 DYNAMIC=".dynamic ${RELOCATING-0} : { *(.dynamic) }"
86 RODATA=".rodata ${RELOCATING-0} : { *(.rodata${RELOCATING+ .rodata.* .gnu.linkonce.r.*}) }"
87 if test -z "${NO_SMALL_DATA}"; then
88 SBSS=".sbss ${RELOCATING-0} :
89 {
90 ${RELOCATING+PROVIDE (__sbss_start = .);}
91 ${RELOCATING+PROVIDE (___sbss_start = .);}
92 *(.dynsbss)
93 *(.sbss${RELOCATING+ .sbss.* .gnu.linkonce.sb.*})
94 *(.scommon)
95 ${RELOCATING+PROVIDE (__sbss_end = .);}
96 ${RELOCATING+PROVIDE (___sbss_end = .);}
97 }"
98 SBSS2=".sbss2 ${RELOCATING-0} : { *(.sbss2${RELOCATING+ .sbss2.* .gnu.linkonce.sb2.*}) }"
99 SDATA="/* We want the small data sections together, so single-instruction offsets
100 can access them all, and initialized data all before uninitialized, so
101 we can shorten the on-disk segment size. */
102 .sdata ${RELOCATING-0} :
103 {
104 ${RELOCATING+${SDATA_START_SYMBOLS}}
105 *(.sdata${RELOCATING+ .sdata.* .gnu.linkonce.s.*})
106 }"
107 SDATA2=".sdata2 ${RELOCATING-0} : { *(.sdata2${RELOCATING+ .sdata2.* .gnu.linkonce.s2.*}) }"
108 REL_SDATA=".rel.sdata ${RELOCATING-0} : { *(.rel.sdata${RELOCATING+ .rel.sdata.* .rel.gnu.linkonce.s.*}) }
109 .rela.sdata ${RELOCATING-0} : { *(.rela.sdata${RELOCATING+ .rela.sdata.* .rela.gnu.linkonce.s.*}) }"
110 REL_SBSS=".rel.sbss ${RELOCATING-0} : { *(.rel.sbss${RELOCATING+ .rel.sbss.* .rel.gnu.linkonce.sb.*}) }
111 .rela.sbss ${RELOCATING-0} : { *(.rela.sbss${RELOCATING+ .rela.sbss.* .rela.gnu.linkonce.sb.*}) }"
112 REL_SDATA2=".rel.sdata2 ${RELOCATING-0} : { *(.rel.sdata2${RELOCATING+ .rel.sdata2.* .rel.gnu.linkonce.s2.*}) }
113 .rela.sdata2 ${RELOCATING-0} : { *(.rela.sdata2${RELOCATING+ .rela.sdata2.* .rela.gnu.linkonce.s2.*}) }"
114 REL_SBSS2=".rel.sbss2 ${RELOCATING-0} : { *(.rel.sbss2${RELOCATING+ .rel.sbss2.* .rel.gnu.linkonce.sb2.*}) }
115 .rela.sbss2 ${RELOCATING-0} : { *(.rela.sbss2${RELOCATING+ .rela.sbss2.* .rela.gnu.linkonce.sb2.*}) }"
116 fi
117 CTOR=".ctors ${CONSTRUCTING-0} :
118 {
119 ${CONSTRUCTING+${CTOR_START}}
120 /* gcc uses crtbegin.o to find the start of
121 the constructors, so we make sure it is
122 first. Because this is a wildcard, it
123 doesn't matter if the user does not
124 actually link against crtbegin.o; the
125 linker won't look for a file to match a
126 wildcard. The wildcard also means that it
127 doesn't matter which directory crtbegin.o
128 is in. */
129
130 KEEP (*crtbegin*.o(.ctors))
131
132 /* We don't want to include the .ctor section from
133 from the crtend.o file until after the sorted ctors.
134 The .ctor section from the crtend file contains the
135 end of ctors marker and it must be last */
136
137 KEEP (*(EXCLUDE_FILE (*crtend*.o $OTHER_EXCLUDE_FILES) .ctors))
138 KEEP (*(SORT(.ctors.*)))
139 KEEP (*(.ctors))
140 ${CONSTRUCTING+${CTOR_END}}
141 }"
142 DTOR=".dtors ${CONSTRUCTING-0} :
143 {
144 ${CONSTRUCTING+${DTOR_START}}
145 KEEP (*crtbegin*.o(.dtors))
146 KEEP (*(EXCLUDE_FILE (*crtend*.o $OTHER_EXCLUDE_FILES) .dtors))
147 KEEP (*(SORT(.dtors.*)))
148 KEEP (*(.dtors))
149 ${CONSTRUCTING+${DTOR_END}}
150 }"
151 STACK=" .stack ${RELOCATING-0}${RELOCATING+${STACK_ADDR}} :
152 {
153 ${RELOCATING+_stack = .;}
154 *(.stack)
155 }"
156
157 # if this is for an embedded system, don't add SIZEOF_HEADERS.
158 if [ -z "$EMBEDDED" ]; then
159 test -z "${TEXT_BASE_ADDRESS}" && TEXT_BASE_ADDRESS="${TEXT_START_ADDR} + SIZEOF_HEADERS"
160 else
161 test -z "${TEXT_BASE_ADDRESS}" && TEXT_BASE_ADDRESS="${TEXT_START_ADDR}"
162 fi
163
164 cat <<EOF
165 OUTPUT_FORMAT("${OUTPUT_FORMAT}", "${BIG_OUTPUT_FORMAT}",
166 "${LITTLE_OUTPUT_FORMAT}")
167 OUTPUT_ARCH(${OUTPUT_ARCH})
168 ENTRY(${ENTRY})
169
170 ${RELOCATING+${LIB_SEARCH_DIRS}}
171 ${RELOCATING+/* Do we need any of these for elf?
172 __DYNAMIC = 0; ${STACKZERO+${STACKZERO}} ${SHLIB_PATH+${SHLIB_PATH}} */}
173 ${RELOCATING+${EXECUTABLE_SYMBOLS}}
174 ${RELOCATING+${INPUT_FILES}}
175 ${RELOCATING- /* For some reason, the Solaris linker makes bad executables
176 if gld -r is used and the intermediate file has sections starting
177 at non-zero addresses. Could be a Solaris ld bug, could be a GNU ld
178 bug. But for now assigning the zero vmas works. */}
179
180 SECTIONS
181 {
182 /* Read-only sections, merged into text segment: */
183 ${CREATE_SHLIB-${CREATE_PIE-${RELOCATING+. = ${TEXT_BASE_ADDRESS};}}}
184 ${CREATE_SHLIB+${RELOCATING+. = ${SHLIB_TEXT_START_ADDR:-0} + SIZEOF_HEADERS;}}
185 ${CREATE_PIE+${RELOCATING+. = ${SHLIB_TEXT_START_ADDR:-0} + SIZEOF_HEADERS;}}
186 ${CREATE_SHLIB-${INTERP}}
187 ${INITIAL_READONLY_SECTIONS}
188 ${TEXT_DYNAMIC+${DYNAMIC}}
189 .hash ${RELOCATING-0} : { *(.hash) }
190 .dynsym ${RELOCATING-0} : { *(.dynsym) }
191 .dynstr ${RELOCATING-0} : { *(.dynstr) }
192 .gnu.version ${RELOCATING-0} : { *(.gnu.version) }
193 .gnu.version_d ${RELOCATING-0}: { *(.gnu.version_d) }
194 .gnu.version_r ${RELOCATING-0}: { *(.gnu.version_r) }
195
196 EOF
197 if [ "x$COMBRELOC" = x ]; then
198 COMBRELOCCAT=cat
199 else
200 COMBRELOCCAT="cat > $COMBRELOC"
201 fi
202 eval $COMBRELOCCAT <<EOF
203 .rel.init ${RELOCATING-0} : { *(.rel.init) }
204 .rela.init ${RELOCATING-0} : { *(.rela.init) }
205 .rel.text ${RELOCATING-0} : { *(.rel.text${RELOCATING+ .rel.text.* .rel.gnu.linkonce.t.*}) }
206 .rela.text ${RELOCATING-0} : { *(.rela.text${RELOCATING+ .rela.text.* .rela.gnu.linkonce.t.*}) }
207 .rel.fini ${RELOCATING-0} : { *(.rel.fini) }
208 .rela.fini ${RELOCATING-0} : { *(.rela.fini) }
209 .rel.rodata ${RELOCATING-0} : { *(.rel.rodata${RELOCATING+ .rel.rodata.* .rel.gnu.linkonce.r.*}) }
210 .rela.rodata ${RELOCATING-0} : { *(.rela.rodata${RELOCATING+ .rela.rodata.* .rela.gnu.linkonce.r.*}) }
211 ${OTHER_READONLY_RELOC_SECTIONS}
212 .rel.data ${RELOCATING-0} : { *(.rel.data${RELOCATING+ .rel.data.* .rel.gnu.linkonce.d.*}) }
213 .rela.data ${RELOCATING-0} : { *(.rela.data${RELOCATING+ .rela.data.* .rela.gnu.linkonce.d.*}) }
214 .rel.tdata ${RELOCATING-0} : { *(.rel.tdata${RELOCATING+ .rel.tdata.* .rel.gnu.linkonce.td.*}) }
215 .rela.tdata ${RELOCATING-0} : { *(.rela.tdata${RELOCATING+ .rela.tdata.* .rela.gnu.linkonce.td.*}) }
216 .rel.tbss ${RELOCATING-0} : { *(.rel.tbss${RELOCATING+ .rel.tbss.* .rel.gnu.linkonce.tb.*}) }
217 .rela.tbss ${RELOCATING-0} : { *(.rela.tbss${RELOCATING+ .rela.tbss.* .rela.gnu.linkonce.tb.*}) }
218 .rel.ctors ${RELOCATING-0} : { *(.rel.ctors) }
219 .rela.ctors ${RELOCATING-0} : { *(.rela.ctors) }
220 .rel.dtors ${RELOCATING-0} : { *(.rel.dtors) }
221 .rela.dtors ${RELOCATING-0} : { *(.rela.dtors) }
222 .rel.got ${RELOCATING-0} : { *(.rel.got) }
223 .rela.got ${RELOCATING-0} : { *(.rela.got) }
224 ${OTHER_GOT_RELOC_SECTIONS}
225 ${REL_SDATA}
226 ${REL_SBSS}
227 ${REL_SDATA2}
228 ${REL_SBSS2}
229 .rel.bss ${RELOCATING-0} : { *(.rel.bss${RELOCATING+ .rel.bss.* .rel.gnu.linkonce.b.*}) }
230 .rela.bss ${RELOCATING-0} : { *(.rela.bss${RELOCATING+ .rela.bss.* .rela.gnu.linkonce.b.*}) }
231 EOF
232 if [ -n "$COMBRELOC" ]; then
233 cat <<EOF
234 .rel.dyn ${RELOCATING-0} :
235 {
236 EOF
237 sed -e '/^[ ]*[{}][ ]*$/d;/:[ ]*$/d;/\.rela\./d;s/^.*: { *\(.*\)}$/ \1/' $COMBRELOC
238 cat <<EOF
239 }
240 .rela.dyn ${RELOCATING-0} :
241 {
242 EOF
243 sed -e '/^[ ]*[{}][ ]*$/d;/:[ ]*$/d;/\.rel\./d;s/^.*: { *\(.*\)}/ \1/' $COMBRELOC
244 cat <<EOF
245 }
246 EOF
247 fi
248 cat <<EOF
249 .rel.plt ${RELOCATING-0} : { *(.rel.plt) }
250 .rela.plt ${RELOCATING-0} : { *(.rela.plt) }
251 ${OTHER_PLT_RELOC_SECTIONS}
252
253 .init ${RELOCATING-0} :
254 {
255 ${RELOCATING+${INIT_START}}
256 KEEP (*(.init))
257 ${RELOCATING+${INIT_END}}
258 } =${NOP-0}
259
260 ${DATA_PLT-${BSS_PLT-${PLT}}}
261 .text ${RELOCATING-0} :
262 {
263 ${RELOCATING+${TEXT_START_SYMBOLS}}
264 *(.text .stub${RELOCATING+ .text.* .gnu.linkonce.t.*})
265 /* .gnu.warning sections are handled specially by elf32.em. */
266 *(.gnu.warning)
267 ${RELOCATING+${OTHER_TEXT_SECTIONS}}
268 } =${NOP-0}
269 .fini ${RELOCATING-0} :
270 {
271 ${RELOCATING+${FINI_START}}
272 KEEP (*(.fini))
273 ${RELOCATING+${FINI_END}}
274 } =${NOP-0}
275 ${RELOCATING+PROVIDE (__etext = .);}
276 ${RELOCATING+PROVIDE (_etext = .);}
277 ${RELOCATING+PROVIDE (etext = .);}
278 ${WRITABLE_RODATA-${RODATA}}
279 .rodata1 ${RELOCATING-0} : { *(.rodata1) }
280 ${CREATE_SHLIB-${SDATA2}}
281 ${CREATE_SHLIB-${SBSS2}}
282 ${OTHER_READONLY_SECTIONS}
283 .eh_frame_hdr : { *(.eh_frame_hdr) }
284
285 /* Adjust the address for the data segment. We want to adjust up to
286 the same address within the page on the next page up. */
287 ${CREATE_SHLIB-${RELOCATING+. = ${DATA_ADDR-${DATA_SEGMENT_ALIGN}};}}
288 ${CREATE_SHLIB+${RELOCATING+. = ${SHLIB_DATA_ADDR-${DATA_SEGMENT_ALIGN}};}}
289
290 /* Ensure the __preinit_array_start label is properly aligned. We
291 could instead move the label definition inside the section, but
292 the linker would then create the section even if it turns out to
293 be empty, which isn't pretty. */
294 ${RELOCATING+. = ALIGN(${ALIGNMENT});}
295 ${RELOCATING+${CREATE_SHLIB-PROVIDE (__preinit_array_start = .);}}
296 .preinit_array ${RELOCATING-0} : { *(.preinit_array) }
297 ${RELOCATING+${CREATE_SHLIB-PROVIDE (__preinit_array_end = .);}}
298
299 ${RELOCATING+${CREATE_SHLIB-PROVIDE (__init_array_start = .);}}
300 .init_array ${RELOCATING-0} : { *(.init_array) }
301 ${RELOCATING+${CREATE_SHLIB-PROVIDE (__init_array_end = .);}}
302
303 ${RELOCATING+${CREATE_SHLIB-PROVIDE (__fini_array_start = .);}}
304 .fini_array ${RELOCATING-0} : { *(.fini_array) }
305 ${RELOCATING+${CREATE_SHLIB-PROVIDE (__fini_array_end = .);}}
306
307 .data ${RELOCATING-0} :
308 {
309 ${RELOCATING+${DATA_START_SYMBOLS}}
310 *(.data${RELOCATING+ .data.* .gnu.linkonce.d.*})
311 ${CONSTRUCTING+SORT(CONSTRUCTORS)}
312 }
313 .data1 ${RELOCATING-0} : { *(.data1) }
314 .tdata ${RELOCATING-0} : { *(.tdata${RELOCATING+ .tdata.* .gnu.linkonce.td.*}) }
315 .tbss ${RELOCATING-0} : { *(.tbss${RELOCATING+ .tbss.* .gnu.linkonce.tb.*})${RELOCATING+ *(.tcommon)} }
316 .eh_frame ${RELOCATING-0} : { KEEP (*(.eh_frame)) }
317 .gcc_except_table ${RELOCATING-0} : { *(.gcc_except_table) }
318 ${WRITABLE_RODATA+${RODATA}}
319 ${OTHER_READWRITE_SECTIONS}
320 ${TEXT_DYNAMIC-${DYNAMIC}}
321 ${RELOCATING+${CTOR}}
322 ${RELOCATING+${DTOR}}
323 .jcr ${RELOCATING-0} : { KEEP (*(.jcr)) }
324 ${DATA_PLT+${PLT}}
325 ${RELOCATING+${OTHER_GOT_SYMBOLS}}
326 .got ${RELOCATING-0} : { *(.got.plt) *(.got) }
327 ${OTHER_GOT_SECTIONS}
328 ${CREATE_SHLIB+${SDATA2}}
329 ${CREATE_SHLIB+${SBSS2}}
330 ${SDATA}
331 ${OTHER_SDATA_SECTIONS}
332 ${RELOCATING+_edata = .;}
333 ${RELOCATING+PROVIDE (edata = .);}
334 ${RELOCATING+__bss_start = .;}
335 ${RELOCATING+${OTHER_BSS_SYMBOLS}}
336 ${SBSS}
337 ${BSS_PLT+${PLT}}
338 .bss ${RELOCATING-0} :
339 {
340 *(.dynbss)
341 *(.bss${RELOCATING+ .bss.* .gnu.linkonce.b.*})
342 *(COMMON)
343 /* Align here to ensure that the .bss section occupies space up to
344 _end. Align after .bss to ensure correct alignment even if the
345 .bss section disappears because there are no input sections. */
346 ${RELOCATING+. = ALIGN(${ALIGNMENT});}
347 }
348 ${OTHER_BSS_SECTIONS}
349 ${RELOCATING+. = ALIGN(${ALIGNMENT});}
350 ${RELOCATING+_end = .;}
351 ${RELOCATING+${OTHER_BSS_END_SYMBOLS}}
352 ${RELOCATING+PROVIDE (end = .);}
353 ${RELOCATING+${DATA_SEGMENT_END}}
354
355 /* Stabs debugging sections. */
356 .stab 0 : { *(.stab) }
357 .stabstr 0 : { *(.stabstr) }
358 .stab.excl 0 : { *(.stab.excl) }
359 .stab.exclstr 0 : { *(.stab.exclstr) }
360 .stab.index 0 : { *(.stab.index) }
361 .stab.indexstr 0 : { *(.stab.indexstr) }
362
363 .comment 0 : { *(.comment) }
364
365 /* DWARF debug sections.
366 Symbols in the DWARF debugging sections are relative to the beginning
367 of the section so we begin them at 0. */
368
369 /* DWARF 1 */
370 .debug 0 : { *(.debug) }
371 .line 0 : { *(.line) }
372
373 /* GNU DWARF 1 extensions */
374 .debug_srcinfo 0 : { *(.debug_srcinfo) }
375 .debug_sfnames 0 : { *(.debug_sfnames) }
376
377 /* DWARF 1.1 and DWARF 2 */
378 .debug_aranges 0 : { *(.debug_aranges) }
379 .debug_pubnames 0 : { *(.debug_pubnames) }
380
381 /* DWARF 2 */
382 .debug_info 0 : { *(.debug_info .gnu.linkonce.wi.*) }
383 .debug_abbrev 0 : { *(.debug_abbrev) }
384 .debug_line 0 : { *(.debug_line) }
385 .debug_frame 0 : { *(.debug_frame) }
386 .debug_str 0 : { *(.debug_str) }
387 .debug_loc 0 : { *(.debug_loc) }
388 .debug_macinfo 0 : { *(.debug_macinfo) }
389
390 /* SGI/MIPS DWARF 2 extensions */
391 .debug_weaknames 0 : { *(.debug_weaknames) }
392 .debug_funcnames 0 : { *(.debug_funcnames) }
393 .debug_typenames 0 : { *(.debug_typenames) }
394 .debug_varnames 0 : { *(.debug_varnames) }
395
396 ${STACK_ADDR+${STACK}}
397 ${OTHER_SECTIONS}
398 ${RELOCATING+${OTHER_END_SYMBOLS}}
399 }
400 EOF
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