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
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
19 # DATA_START_SYMBOLS - symbols that appear at the start of the
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.
41 # When adding sections, do note that the names of some sections are used
42 # when specifying the start address of the next.
44 # Many sections come in three flavours. There is the 'real' section,
45 # like ".data". Then there are the per-procedure or per-variable
46 # sections, generated by -ffunction-sections and -fdata-sections in GCC,
47 # and useful for --gc-sections, which for a variable "foo" might be
48 # ".data.foo". Then there are the linkonce sections, for which the linker
49 # eliminates duplicates, which are named like ".gnu.linkonce.d.foo".
50 # The exact correspondences are:
52 # Section Linkonce section
53 # .text .gnu.linkonce.t.foo
54 # .rodata .gnu.linkonce.r.foo
55 # .data .gnu.linkonce.d.foo
56 # .bss .gnu.linkonce.b.foo
57 # .sdata .gnu.linkonce.s.foo
58 # .sbss .gnu.linkonce.sb.foo
59 # .sdata2 .gnu.linkonce.s2.foo
60 # .sbss2 .gnu.linkonce.sb2.foo
61 # .debug_info .gnu.linkonce.wi.foo
62 # .tdata .gnu.linkonce.td.foo
63 # .tbss .gnu.linkonce.tb.foo
65 # Each of these can also have corresponding .rel.* and .rela.* sections.
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 "$LD_FLAG" = "N" && DATA_ADDR=.
73 test -n "$CREATE_SHLIB$CREATE_PIE" && test -n "$SHLIB_DATA_ADDR" && COMMONPAGESIZE=""
74 test -z "$CREATE_SHLIB$CREATE_PIE" && test -n "$DATA_ADDR" && COMMONPAGESIZE=""
75 DATA_SEGMENT_ALIGN="ALIGN(${SEGMENT_SIZE}) + (. & (${MAXPAGESIZE} - 1))"
77 if test -n "${COMMONPAGESIZE}"; then
78 DATA_SEGMENT_ALIGN="ALIGN (${SEGMENT_SIZE}) - ((${MAXPAGESIZE} - .) & (${MAXPAGESIZE} - 1)); . = DATA_SEGMENT_ALIGN (${MAXPAGESIZE}, ${COMMONPAGESIZE})"
79 DATA_SEGMENT_END=". = DATA_SEGMENT_END (.);"
81 INTERP=".interp ${RELOCATING-0} : { *(.interp) }"
82 PLT=".plt ${RELOCATING-0} : { *(.plt) }"
83 test -z "$GOT" && GOT=".got ${RELOCATING-0} : { *(.got.plt) *(.got) }"
84 DYNAMIC=".dynamic ${RELOCATING-0} : { *(.dynamic) }"
85 RODATA=".rodata ${RELOCATING-0} : { *(.rodata${RELOCATING+ .rodata.* .gnu.linkonce.r.*}) }"
86 STACKNOTE="/DISCARD/ : { *(.note.GNU-stack) }"
87 if test -z "${NO_SMALL_DATA}"; then
88 SBSS=".sbss ${RELOCATING-0} :
90 ${RELOCATING+PROVIDE (__sbss_start = .);}
91 ${RELOCATING+PROVIDE (___sbss_start = .);}
93 *(.sbss${RELOCATING+ .sbss.* .gnu.linkonce.sb.*})
95 ${RELOCATING+PROVIDE (__sbss_end = .);}
96 ${RELOCATING+PROVIDE (___sbss_end = .);}
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} :
104 ${RELOCATING+${SDATA_START_SYMBOLS}}
105 *(.sdata${RELOCATING+ .sdata.* .gnu.linkonce.s.*})
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.*}) }"
117 CTOR=".ctors ${CONSTRUCTING-0} :
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
130 KEEP (*crtbegin*.o(.ctors))
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 */
137 KEEP (*(EXCLUDE_FILE (*crtend*.o $OTHER_EXCLUDE_FILES) .ctors))
138 KEEP (*(SORT(.ctors.*)))
140 ${CONSTRUCTING+${CTOR_END}}
142 DTOR=".dtors ${CONSTRUCTING-0} :
144 ${CONSTRUCTING+${DTOR_START}}
145 KEEP (*crtbegin*.o(.dtors))
146 KEEP (*(EXCLUDE_FILE (*crtend*.o $OTHER_EXCLUDE_FILES) .dtors))
147 KEEP (*(SORT(.dtors.*)))
149 ${CONSTRUCTING+${DTOR_END}}
151 STACK=" .stack ${RELOCATING-0}${RELOCATING+${STACK_ADDR}} :
153 ${RELOCATING+_stack = .;}
157 # if this is for an embedded system, don't add SIZEOF_HEADERS.
158 if [ -z "$EMBEDDED" ]; then
159 test -z "${TEXT_BASE_ADDRESS}" && TEXT_BASE_ADDRESS="${TEXT_START_ADDR} + SIZEOF_HEADERS"
161 test -z "${TEXT_BASE_ADDRESS}" && TEXT_BASE_ADDRESS="${TEXT_START_ADDR}"
165 OUTPUT_FORMAT("${OUTPUT_FORMAT}", "${BIG_OUTPUT_FORMAT}",
166 "${LITTLE_OUTPUT_FORMAT}")
167 OUTPUT_ARCH(${OUTPUT_ARCH})
171 ${RELOCATING+${LIB_SEARCH_DIRS}}
172 ${RELOCATING+/* Do we need any of these for elf?
173 __DYNAMIC = 0; ${STACKZERO+${STACKZERO}} ${SHLIB_PATH+${SHLIB_PATH}} */}
174 ${RELOCATING+${EXECUTABLE_SYMBOLS}}
175 ${RELOCATING+${INPUT_FILES}}
176 ${RELOCATING- /* For some reason, the Solaris linker makes bad executables
177 if gld -r is used and the intermediate file has sections starting
178 at non-zero addresses. Could be a Solaris ld bug, could be a GNU ld
179 bug. But for now assigning the zero vmas works. */}
183 /* Read-only sections, merged into text segment: */
184 ${CREATE_SHLIB-${CREATE_PIE-${RELOCATING+PROVIDE (__executable_start = ${TEXT_START_ADDR}); . = ${TEXT_BASE_ADDRESS};}}}
185 ${CREATE_SHLIB+${RELOCATING+. = ${SHLIB_TEXT_START_ADDR:-0} + SIZEOF_HEADERS;}}
186 ${CREATE_PIE+${RELOCATING+. = ${SHLIB_TEXT_START_ADDR:-0} + SIZEOF_HEADERS;}}
187 ${CREATE_SHLIB-${INTERP}}
188 ${INITIAL_READONLY_SECTIONS}
189 ${TEXT_DYNAMIC+${DYNAMIC}}
190 .hash ${RELOCATING-0} : { *(.hash) }
191 .dynsym ${RELOCATING-0} : { *(.dynsym) }
192 .dynstr ${RELOCATING-0} : { *(.dynstr) }
193 .gnu.version ${RELOCATING-0} : { *(.gnu.version) }
194 .gnu.version_d ${RELOCATING-0}: { *(.gnu.version_d) }
195 .gnu.version_r ${RELOCATING-0}: { *(.gnu.version_r) }
198 if [ "x$COMBRELOC" = x ]; then
201 COMBRELOCCAT="cat > $COMBRELOC"
203 eval $COMBRELOCCAT <<EOF
204 .rel.init ${RELOCATING-0} : { *(.rel.init) }
205 .rela.init ${RELOCATING-0} : { *(.rela.init) }
206 .rel.text ${RELOCATING-0} : { *(.rel.text${RELOCATING+ .rel.text.* .rel.gnu.linkonce.t.*}) }
207 .rela.text ${RELOCATING-0} : { *(.rela.text${RELOCATING+ .rela.text.* .rela.gnu.linkonce.t.*}) }
208 .rel.fini ${RELOCATING-0} : { *(.rel.fini) }
209 .rela.fini ${RELOCATING-0} : { *(.rela.fini) }
210 .rel.rodata ${RELOCATING-0} : { *(.rel.rodata${RELOCATING+ .rel.rodata.* .rel.gnu.linkonce.r.*}) }
211 .rela.rodata ${RELOCATING-0} : { *(.rela.rodata${RELOCATING+ .rela.rodata.* .rela.gnu.linkonce.r.*}) }
212 ${OTHER_READONLY_RELOC_SECTIONS}
213 .rel.data ${RELOCATING-0} : { *(.rel.data${RELOCATING+ .rel.data.* .rel.gnu.linkonce.d.*}) }
214 .rela.data ${RELOCATING-0} : { *(.rela.data${RELOCATING+ .rela.data.* .rela.gnu.linkonce.d.*}) }
215 .rel.tdata ${RELOCATING-0} : { *(.rel.tdata${RELOCATING+ .rel.tdata.* .rel.gnu.linkonce.td.*}) }
216 .rela.tdata ${RELOCATING-0} : { *(.rela.tdata${RELOCATING+ .rela.tdata.* .rela.gnu.linkonce.td.*}) }
217 .rel.tbss ${RELOCATING-0} : { *(.rel.tbss${RELOCATING+ .rel.tbss.* .rel.gnu.linkonce.tb.*}) }
218 .rela.tbss ${RELOCATING-0} : { *(.rela.tbss${RELOCATING+ .rela.tbss.* .rela.gnu.linkonce.tb.*}) }
219 .rel.ctors ${RELOCATING-0} : { *(.rel.ctors) }
220 .rela.ctors ${RELOCATING-0} : { *(.rela.ctors) }
221 .rel.dtors ${RELOCATING-0} : { *(.rel.dtors) }
222 .rela.dtors ${RELOCATING-0} : { *(.rela.dtors) }
223 .rel.got ${RELOCATING-0} : { *(.rel.got) }
224 .rela.got ${RELOCATING-0} : { *(.rela.got) }
225 ${OTHER_GOT_RELOC_SECTIONS}
230 .rel.bss ${RELOCATING-0} : { *(.rel.bss${RELOCATING+ .rel.bss.* .rel.gnu.linkonce.b.*}) }
231 .rela.bss ${RELOCATING-0} : { *(.rela.bss${RELOCATING+ .rela.bss.* .rela.gnu.linkonce.b.*}) }
233 if [ -n "$COMBRELOC" ]; then
235 .rel.dyn ${RELOCATING-0} :
238 sed -e '/^[ ]*[{}][ ]*$/d;/:[ ]*$/d;/\.rela\./d;s/^.*: { *\(.*\)}$/ \1/' $COMBRELOC
241 .rela.dyn ${RELOCATING-0} :
244 sed -e '/^[ ]*[{}][ ]*$/d;/:[ ]*$/d;/\.rel\./d;s/^.*: { *\(.*\)}/ \1/' $COMBRELOC
250 .rel.plt ${RELOCATING-0} : { *(.rel.plt) }
251 .rela.plt ${RELOCATING-0} : { *(.rela.plt) }
252 ${OTHER_PLT_RELOC_SECTIONS}
254 .fixed_vectors ${RELOCATING-0} :
257 KEEP (*(.fixed_vectors))
261 .init ${RELOCATING-0} :
263 ${RELOCATING+${INIT_START}}
265 ${RELOCATING+${INIT_END}}
268 ${DATA_PLT-${BSS_PLT-${PLT}}}
269 .text ${RELOCATING-0} :
271 ${RELOCATING+${TEXT_START_SYMBOLS}}
272 *(.text .stub${RELOCATING+ .text.* .gnu.linkonce.t.*})
273 /* .gnu.warning sections are handled specially by elf32.em. */
275 ${RELOCATING+${OTHER_TEXT_SECTIONS}}
277 .fini ${RELOCATING-0} :
279 ${RELOCATING+${FINI_START}}
281 ${RELOCATING+${FINI_END}}
283 ${RELOCATING+PROVIDE (__etext = .);}
284 ${RELOCATING+PROVIDE (_etext = .);}
285 ${RELOCATING+PROVIDE (etext = .);}
286 ${WRITABLE_RODATA-${RODATA}}
287 .rodata1 ${RELOCATING-0} : { *(.rodata1) }
288 ${CREATE_SHLIB-${SDATA2}}
289 ${CREATE_SHLIB-${SBSS2}}
290 ${OTHER_READONLY_SECTIONS}
291 .eh_frame_hdr : { *(.eh_frame_hdr) }
293 /* Adjust the address for the data segment. We want to adjust up to
294 the same address within the page on the next page up. */
295 ${CREATE_SHLIB-${CREATE_PIE-${RELOCATING+. = ${DATA_ADDR-${DATA_SEGMENT_ALIGN}};}}}
296 ${CREATE_SHLIB+${RELOCATING+. = ${SHLIB_DATA_ADDR-${DATA_SEGMENT_ALIGN}};}}
297 ${CREATE_PIE+${RELOCATING+. = ${SHLIB_DATA_ADDR-${DATA_SEGMENT_ALIGN}};}}
299 /* Ensure the __preinit_array_start label is properly aligned. We
300 could instead move the label definition inside the section, but
301 the linker would then create the section even if it turns out to
302 be empty, which isn't pretty. */
303 ${RELOCATING+. = ALIGN(${ALIGNMENT});}
304 ${RELOCATING+${CREATE_SHLIB-PROVIDE (__preinit_array_start = .);}}
305 .preinit_array ${RELOCATING-0} : { *(.preinit_array) }
306 ${RELOCATING+${CREATE_SHLIB-PROVIDE (__preinit_array_end = .);}}
308 ${RELOCATING+${CREATE_SHLIB-PROVIDE (__init_array_start = .);}}
309 .init_array ${RELOCATING-0} : { *(.init_array) }
310 ${RELOCATING+${CREATE_SHLIB-PROVIDE (__init_array_end = .);}}
312 ${RELOCATING+${CREATE_SHLIB-PROVIDE (__fini_array_start = .);}}
313 .fini_array ${RELOCATING-0} : { *(.fini_array) }
314 ${RELOCATING+${CREATE_SHLIB-PROVIDE (__fini_array_end = .);}}
316 .data ${RELOCATING-0} :
318 ${RELOCATING+${DATA_START_SYMBOLS}}
319 *(.data${RELOCATING+ .data.* .gnu.linkonce.d.*})
320 ${CONSTRUCTING+SORT(CONSTRUCTORS)}
322 .data1 ${RELOCATING-0} : { *(.data1) }
323 .tdata ${RELOCATING-0} : { *(.tdata${RELOCATING+ .tdata.* .gnu.linkonce.td.*}) }
324 .tbss ${RELOCATING-0} : { *(.tbss${RELOCATING+ .tbss.* .gnu.linkonce.tb.*})${RELOCATING+ *(.tcommon)} }
325 .eh_frame ${RELOCATING-0} : { KEEP (*(.eh_frame)) }
326 .gcc_except_table ${RELOCATING-0} : { *(.gcc_except_table) }
327 ${WRITABLE_RODATA+${RODATA}}
328 ${OTHER_READWRITE_SECTIONS}
329 ${TEXT_DYNAMIC-${DYNAMIC}}
330 ${RELOCATING+${CTOR}}
331 ${RELOCATING+${DTOR}}
332 .jcr ${RELOCATING-0} : { KEEP (*(.jcr)) }
334 ${RELOCATING+${OTHER_GOT_SYMBOLS}}
336 ${OTHER_GOT_SECTIONS}
337 ${CREATE_SHLIB+${SDATA2}}
338 ${CREATE_SHLIB+${SBSS2}}
340 ${OTHER_SDATA_SECTIONS}
341 ${RELOCATING+_edata = .;}
342 ${RELOCATING+PROVIDE (edata = .);}
343 ${RELOCATING+__bss_start = .;}
344 ${RELOCATING+${OTHER_BSS_SYMBOLS}}
347 .bss ${RELOCATING-0} :
350 *(.bss${RELOCATING+ .bss.* .gnu.linkonce.b.*})
352 /* Align here to ensure that the .bss section occupies space up to
353 _end. Align after .bss to ensure correct alignment even if the
354 .bss section disappears because there are no input sections. */
355 ${RELOCATING+. = ALIGN(${ALIGNMENT});}
357 ${OTHER_BSS_SECTIONS}
358 ${RELOCATING+. = ALIGN(${ALIGNMENT});}
359 ${RELOCATING+_end = .;}
360 ${RELOCATING+${OTHER_BSS_END_SYMBOLS}}
361 ${RELOCATING+PROVIDE (end = .);}
362 ${RELOCATING+${DATA_SEGMENT_END}}
364 /* Stabs debugging sections. */
365 .stab 0 : { *(.stab) }
366 .stabstr 0 : { *(.stabstr) }
367 .stab.excl 0 : { *(.stab.excl) }
368 .stab.exclstr 0 : { *(.stab.exclstr) }
369 .stab.index 0 : { *(.stab.index) }
370 .stab.indexstr 0 : { *(.stab.indexstr) }
372 .comment 0 : { *(.comment) }
374 /* DWARF debug sections.
375 Symbols in the DWARF debugging sections are relative to the beginning
376 of the section so we begin them at 0. */
379 .debug 0 : { *(.debug) }
380 .line 0 : { *(.line) }
382 /* GNU DWARF 1 extensions */
383 .debug_srcinfo 0 : { *(.debug_srcinfo) }
384 .debug_sfnames 0 : { *(.debug_sfnames) }
386 /* DWARF 1.1 and DWARF 2 */
387 .debug_aranges 0 : { *(.debug_aranges) }
388 .debug_pubnames 0 : { *(.debug_pubnames) }
391 .debug_info 0 : { *(.debug_info .gnu.linkonce.wi.*) }
392 .debug_abbrev 0 : { *(.debug_abbrev) }
393 .debug_line 0 : { *(.debug_line) }
394 .debug_frame 0 : { *(.debug_frame) }
395 .debug_str 0 : { *(.debug_str) }
396 .debug_loc 0 : { *(.debug_loc) }
397 .debug_macinfo 0 : { *(.debug_macinfo) }
399 /* SGI/MIPS DWARF 2 extensions */
400 .debug_weaknames 0 : { *(.debug_weaknames) }
401 .debug_funcnames 0 : { *(.debug_funcnames) }
402 .debug_typenames 0 : { *(.debug_typenames) }
403 .debug_varnames 0 : { *(.debug_varnames) }
405 ${STACK_ADDR+${STACK}}
407 ${RELOCATING+${OTHER_END_SYMBOLS}}
408 ${RELOCATING+${STACKNOTE}}