2 # Unusual variables checked by this code:
3 # NOP - four byte opcode for no-op (defaults to 0)
4 # DATA_ADDR - if end-of-text-plus-one-page isn't right for data start
5 # INITIAL_READONLY_SECTIONS - at start of text segment
6 # OTHER_READONLY_SECTIONS - other than .text .init .rodata ...
7 # (e.g., .PARISC.milli)
8 # OTHER_TEXT_SECTIONS - these get put in .text when relocating
9 # OTHER_READWRITE_SECTIONS - other than .data .bss .ctors .sdata ...
10 # (e.g., .PARISC.global)
11 # OTHER_BSS_SECTIONS - other than .bss .sbss ...
12 # OTHER_SECTIONS - at the end
13 # EXECUTABLE_SYMBOLS - symbols that must be defined for an
14 # executable (e.g., _DYNAMIC_LINK)
15 # TEXT_START_SYMBOLS - symbols that appear at the start of the
17 # DATA_START_SYMBOLS - symbols that appear at the start of the
19 # OTHER_GOT_SYMBOLS - symbols defined just before .got.
20 # OTHER_GOT_SECTIONS - sections just after .got.
21 # OTHER_SDATA_SECTIONS - sections just after .sdata.
22 # OTHER_BSS_SYMBOLS - symbols that appear at the start of the
23 # .bss section besides __bss_start.
24 # DATA_PLT - .plt should be in data segment, not text segment.
25 # BSS_PLT - .plt should be in bss segment
26 # TEXT_DYNAMIC - .dynamic in text segment, not data segment.
27 # EMBEDDED - whether this is for an embedded system.
28 # SHLIB_TEXT_START_ADDR - if set, add to SIZEOF_HEADERS to set
29 # start address of shared library.
30 # INPUT_FILES - INPUT command of files to always include
31 # WRITABLE_RODATA - if set, the .rodata section should be writable
32 # INIT_START, INIT_END - statements just before and just after
33 # combination of .init sections.
34 # FINI_START, FINI_END - statements just before and just after
35 # combination of .fini sections.
36 # STACK_ADDR - start of a .stack section.
37 # OTHER_END_SYMBOLS - symbols to place right at the end of the script.
39 # When adding sections, do note that the names of some sections are used
40 # when specifying the start address of the next.
43 # Many sections come in three flavours. There is the 'real' section,
44 # like ".data". Then there are the per-procedure or per-variable
45 # sections, generated by -ffunction-sections and -fdata-sections in GCC,
46 # and useful for --gc-sections, which for a variable "foo" might be
47 # ".data.foo". Then there are the linkonce sections, for which the linker
48 # eliminates duplicates, which are named like ".gnu.linkonce.d.foo".
49 # The exact correspondences are:
51 # Section Linkonce section
52 # .text .gnu.linkonce.t.foo
53 # .rodata .gnu.linkonce.r.foo
54 # .data .gnu.linkonce.d.foo
55 # .bss .gnu.linkonce.b.foo
56 # .sdata .gnu.linkonce.s.foo
57 # .sbss .gnu.linkonce.sb.foo
58 # .sdata2 .gnu.linkonce.s2.foo
59 # .sbss2 .gnu.linkonce.sb2.foo
60 # .debug_info .gnu.linkonce.wi.foo
61 # .tdata .gnu.linkonce.td.foo
62 # .tbss .gnu.linkonce.tb.foo
64 # 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}, ${COMMONPAGESIZE})"
79 DATA_SEGMENT_END=". = DATA_SEGMENT_END (.);"
81 INTERP=".interp ALIGN(4) : { *(.interp) }"
82 PLT=".plt : { *(.plt) } :dynamic :dyn"
83 DYNAMIC=".dynamic : { *(.dynamic) } :dynamic :dyn"
84 RODATA=".rodata ALIGN(4) : { *(.rodata${RELOCATING+ .rodata.* .gnu.linkonce.r.*}) }"
85 STACKNOTE="/DISCARD/ : { *(.note.GNU-stack) *(.directive) }"
86 test -z "$GOT" && GOT=".got ${RELOCATING-0} : { *(.got.plt) *(.got) } :dynamic :dyn"
87 CTOR=".ctors ALIGN(4) :
89 ${CONSTRUCTING+${CTOR_START}}
90 /* gcc uses crtbegin.o to find the start of
91 the constructors, so we make sure it is
92 first. Because this is a wildcard, it
93 doesn't matter if the user does not
94 actually link against crtbegin.o; the
95 linker won't look for a file to match a
96 wildcard. The wildcard also means that it
97 doesn't matter which directory crtbegin.o
100 KEEP (*crtbegin*.o(.ctors))
102 /* We don't want to include the .ctor section from
103 from the crtend.o file until after the sorted ctors.
104 The .ctor section from the crtend file contains the
105 end of ctors marker and it must be last */
107 KEEP (*(EXCLUDE_FILE (*crtend*.o $OTHER_EXCLUDE_FILES) .ctors))
108 KEEP (*(SORT(.ctors.*)))
110 ${CONSTRUCTING+${CTOR_END}}
112 DTOR=".dtors ALIGN(4) :
114 ${CONSTRUCTING+${DTOR_START}}
115 KEEP (*crtbegin*.o(.dtors))
116 KEEP (*(EXCLUDE_FILE (*crtend*.o $OTHER_EXCLUDE_FILES) .dtors))
117 KEEP (*(SORT(.dtors.*)))
119 ${CONSTRUCTING+${DTOR_END}}
121 STACK=" .stack ${RELOCATING-0}${RELOCATING+${STACK_ADDR}} :
123 ${RELOCATING+_stack = .;}
127 # if this is for an embedded system, don't add SIZEOF_HEADERS.
128 if [ -z "$EMBEDDED" ]; then
129 test -z "${TEXT_BASE_ADDRESS}" && TEXT_BASE_ADDRESS="${TEXT_START_ADDR} + SIZEOF_HEADERS"
131 test -z "${TEXT_BASE_ADDRESS}" && TEXT_BASE_ADDRESS="${TEXT_START_ADDR}"
135 OUTPUT_FORMAT("${OUTPUT_FORMAT}", "${BIG_OUTPUT_FORMAT}",
136 "${LITTLE_OUTPUT_FORMAT}")
137 OUTPUT_ARCH(${OUTPUT_ARCH})
140 ${RELOCATING+${LIB_SEARCH_DIRS}}
141 ${RELOCATING+/* Do we need any of these for elf?
142 __DYNAMIC = 0; ${STACKZERO+${STACKZERO}} ${SHLIB_PATH+${SHLIB_PATH}} */}
143 ${RELOCATING+${EXECUTABLE_SYMBOLS}}
144 ${RELOCATING+${INPUT_FILES}}
145 ${RELOCATING- /* For some reason, the Solaris linker makes bad executables
146 if gld -r is used and the intermediate file has sections starting
147 at non-zero addresses. Could be a Solaris ld bug, could be a GNU ld
148 bug. But for now assigning the zero vmas works. */}
152 headers PT_PHDR PHDRS ;
155 dyn PT_LOAD FLAGS (0) ;
161 /* Read-only sections, merged into text segment: */
162 ${CREATE_SHLIB-${CREATE_PIE-${RELOCATING+. = ${TEXT_BASE_ADDRESS};}}}
163 ${CREATE_SHLIB+${RELOCATING+. = ${SHLIB_TEXT_START_ADDR:-0};}}
164 ${CREATE_PIE+${RELOCATING+. = ${SHLIB_TEXT_START_ADDR:-0};}}
165 ${CREATE_SHLIB-${INTERP}}
167 ${INITIAL_READONLY_SECTIONS}
171 ${RELOCATING+${INIT_START}}
173 ${RELOCATING+${INIT_END}}
178 ${RELOCATING+${TEXT_START_SYMBOLS}}
179 *(.text .stub${RELOCATING+ .text.* .gnu.linkonce.t.*})
180 /* .gnu.warning sections are handled specially by elf32.em. */
182 ${RELOCATING+${OTHER_TEXT_SECTIONS}}
185 ${RELOCATING+${CTOR}}
186 ${RELOCATING+${DTOR}}
190 ${RELOCATING+${FINI_START}}
192 ${RELOCATING+${FINI_END}}
195 ${RELOCATING+PROVIDE (__etext = .);}
196 ${RELOCATING+PROVIDE (_etext = .);}
197 ${RELOCATING+PROVIDE (etext = .);}
199 ${WRITABLE_RODATA-${RODATA}}
200 .rodata1 ALIGN(4) : { *(.rodata1) }
202 ExportTable ALIGN(4) : { KEEP (*(ExportTable)) }
203 .eh_frame_hdr ALIGN(4) : { *(.eh_frame_hdr) } :text
205 /* Adjust the address for the data segment. We want to adjust up to
206 the same address within the page on the next page up. */
207 . = ALIGN(128) + (. & (128 - 1));
208 /* Ensure the __preinit_array_start label is properly aligned. We
209 could instead move the label definition inside the section, but
210 the linker would then create the section even if it turns out to
211 be empty, which isn't pretty. */
212 ${RELOCATING+. = ALIGN(${ALIGNMENT});}
213 ${RELOCATING+${CREATE_SHLIB-PROVIDE (__preinit_array_start = .);}}
214 .preinit_array ${RELOCATING-0} : { *(.preinit_array) }
215 ${RELOCATING+${CREATE_SHLIB-PROVIDE (__preinit_array_end = .);}}
217 ${RELOCATING+${CREATE_SHLIB-PROVIDE (__init_array_start = .);}}
218 .init_array ${RELOCATING-0} : { *(.init_array) }
219 ${RELOCATING+${CREATE_SHLIB-PROVIDE (__init_array_end = .);}}
221 ${RELOCATING+${CREATE_SHLIB-PROVIDE (__fini_array_start = .);}}
222 .fini_array ${RELOCATING-0} : { *(.fini_array) }
223 ${RELOCATING+${CREATE_SHLIB-PROVIDE (__fini_array_end = .);}}
225 ${CREATE_SHLIB-${CREATE_PIE-${RELOCATING+. = ${DATA_ADDR-${DATA_SEGMENT_ALIGN}};}}}
226 ${CREATE_SHLIB+${RELOCATING+. = ${SHLIB_DATA_ADDR-${DATA_SEGMENT_ALIGN}};}}
227 ${CREATE_PIE+${RELOCATING+. = ${SHLIB_DATA_ADDR-${DATA_SEGMENT_ALIGN}};}}
231 ${RELOCATING+${DATA_START_SYMBOLS}}
232 *(.data${RELOCATING+ .data.* .gnu.linkonce.d.*})
233 ${CONSTRUCTING+SORT(CONSTRUCTORS)}
236 .data1 ALIGN(4) : { *(.data1) } :data
237 .tdata ALIGN(4) : { *(.tdata${RELOCATING+ .tdata.* .gnu.linkonce.td.*}) } :data
238 .tbss ALIGN(4) : { *(.tbss${RELOCATING+ .tbss.* .gnu.linkonce.tb.*})${RELOCATING+ *(.tcommon)} } :data
239 .eh_frame ALIGN(4) : { KEEP (*(.eh_frame)) } :data
240 .gcc_except_table ALIGN(4) : { *(.gcc_except_table) } :data
241 ${WRITABLE_RODATA+${RODATA}}
242 ${OTHER_READWRITE_SECTIONS}
244 ${OTHER_SDATA_SECTIONS}
245 ${RELOCATING+_edata = .;}
246 ${RELOCATING+PROVIDE (edata = .);}
247 ${RELOCATING+__bss_start = .;}
248 ${RELOCATING+${OTHER_BSS_SYMBOLS}}
253 *(.bss${RELOCATING+ .bss.* .gnu.linkonce.b.*})
255 /* Align here to ensure that the .bss section occupies space up to
256 _end. Align after .bss to ensure correct alignment even if the
257 .bss section disappears because there are no input sections. */
258 ${RELOCATING+. = ALIGN(${ALIGNMENT});}
260 ${OTHER_BSS_SECTIONS}
261 ${RELOCATING+. = ALIGN(${ALIGNMENT});}
262 ${RELOCATING+_end = .;}
263 ${RELOCATING+${OTHER_BSS_END_SYMBOLS}}
264 ${RELOCATING+PROVIDE (end = .);}
265 ${RELOCATING+${DATA_SEGMENT_END}}
267 ${TEXT_DYNAMIC-${DYNAMIC}}
268 ${TEXT_DYNAMIC+${DYNAMIC}}
269 .hash ${RELOCATING-0} : { *(.hash) } :dynamic :dyn
270 .dynsym ${RELOCATING-0} : { *(.dynsym) } :dynamic :dyn
271 .dynstr ${RELOCATING-0} : { *(.dynstr) } :dynamic :dyn
272 ${DATA_PLT-${BSS_PLT-${PLT}}}
273 .got.plt : { *(.got.plt) } :dynamic :dyn
274 .gnu.version ${RELOCATING-0} : { *(.gnu.version) }
275 .gnu.version_d ${RELOCATING-0}: { *(.gnu.version_d) }
276 .gnu.version_r ${RELOCATING-0}: { *(.gnu.version_r) }
278 if [ "x$COMBRELOC" = x ]; then
281 COMBRELOCCAT="cat > $COMBRELOC"
283 eval $COMBRELOCCAT <<EOF
284 .rel.init ${RELOCATING-0} : { *(.rel.init) }
285 .rela.init ${RELOCATING-0} : { *(.rela.init) }
286 .rel.text ${RELOCATING-0} : { *(.rel.text${RELOCATING+ .rel.text.* .rel.gnu.linkonce.t.*}) }
287 .rela.text ${RELOCATING-0} : { *(.rela.text${RELOCATING+ .rela.text.* .rela.gnu.linkonce.t.*}) }
288 .rel.fini ${RELOCATING-0} : { *(.rel.fini) }
289 .rela.fini ${RELOCATING-0} : { *(.rela.fini) }
290 .rel.rodata ${RELOCATING-0} : { *(.rel.rodata${RELOCATING+ .rel.rodata.* .rel.gnu.linkonce.r.*}) }
291 .rela.rodata ${RELOCATING-0} : { *(.rela.rodata${RELOCATING+ .rela.rodata.* .rela.gnu.linkonce.r.*}) }
292 ${OTHER_READONLY_RELOC_SECTIONS}
293 .rel.data ${RELOCATING-0} : { *(.rel.data${RELOCATING+ .rel.data.* .rel.gnu.linkonce.d.*}) }
294 .rela.data ${RELOCATING-0} : { *(.rela.data${RELOCATING+ .rela.data.* .rela.gnu.linkonce.d.*}) }
295 .rel.tdata ${RELOCATING-0} : { *(.rel.tdata${RELOCATING+ .rel.tdata.* .rel.gnu.linkonce.td.*}) }
296 .rela.tdata ${RELOCATING-0} : { *(.rela.tdata${RELOCATING+ .rela.tdata.* .rela.gnu.linkonce.td.*}) }
297 .rel.tbss ${RELOCATING-0} : { *(.rel.tbss${RELOCATING+ .rel.tbss.* .rel.gnu.linkonce.tb.*}) }
298 .rela.tbss ${RELOCATING-0} : { *(.rela.tbss${RELOCATING+ .rela.tbss.* .rela.gnu.linkonce.tb.*}) }
299 .rel.ctors ${RELOCATING-0} : { *(.rel.ctors) }
300 .rela.ctors ${RELOCATING-0} : { *(.rela.ctors) }
301 .rel.dtors ${RELOCATING-0} : { *(.rel.dtors) }
302 .rela.dtors ${RELOCATING-0} : { *(.rela.dtors) }
303 .rel.got ${RELOCATING-0} : { *(.rel.got) }
304 .rela.got ${RELOCATING-0} : { *(.rela.got) }
305 ${OTHER_GOT_RELOC_SECTIONS}
306 .rel.bss ${RELOCATING-0} : { *(.rel.bss${RELOCATING+ .rel.bss.* .rel.gnu.linkonce.b.*}) }
307 .rela.bss ${RELOCATING-0} : { *(.rela.bss${RELOCATING+ .rela.bss.* .rela.gnu.linkonce.b.*}) }
309 if [ -n "$COMBRELOC" ]; then
311 .rel.dyn ${RELOCATING-0} :
314 sed -e '/^[ ]*[{}][ ]*$/d;/:[ ]*$/d;/\.rela\./d;s/^.*: { *\(.*\)}$/ \1/' $COMBRELOC
317 .rela.dyn ${RELOCATING-0} :
320 sed -e '/^[ ]*[{}][ ]*$/d;/:[ ]*$/d;/\.rel\./d;s/^.*: { *\(.*\)}/ \1/' $COMBRELOC
326 .rel.plt ${RELOCATING-0} : { *(.rel.plt) }
327 .rela.plt ${RELOCATING-0} : { *(.rela.plt) }
328 ${OTHER_PLT_RELOC_SECTIONS}
331 /* Stabs debugging sections. */
332 .stab 0 : { *(.stab) }
333 .stabstr 0 : { *(.stabstr) }
334 .stab.excl 0 : { *(.stab.excl) }
335 .stab.exclstr 0 : { *(.stab.exclstr) }
336 .stab.index 0 : { *(.stab.index) }
337 .stab.indexstr 0 : { *(.stab.indexstr) }
339 .comment 0 : { *(.comment) }
341 /* DWARF debug sections.
342 Symbols in the DWARF debugging sections are relative to the beginning
343 of the section so we begin them at 0. */
346 .debug 0 : { *(.debug) }
347 .line 0 : { *(.line) }
349 /* GNU DWARF 1 extensions */
350 .debug_srcinfo 0 : { *(.debug_srcinfo) }
351 .debug_sfnames 0 : { *(.debug_sfnames) }
353 /* DWARF 1.1 and DWARF 2 */
354 .debug_aranges 0 : { *(.debug_aranges) }
355 .debug_pubnames 0 : { *(.debug_pubnames) }
358 .debug_info 0 : { *(.debug_info .gnu.linkonce.wi.*) }
359 .debug_abbrev 0 : { *(.debug_abbrev) }
360 .debug_line 0 : { *(.debug_line) }
361 .debug_frame 0 : { *(.debug_frame) }
362 .debug_str 0 : { *(.debug_str) }
363 .debug_loc 0 : { *(.debug_loc) }
364 .debug_macinfo 0 : { *(.debug_macinfo) }
366 /* SGI/MIPS DWARF 2 extensions */
367 .debug_weaknames 0 : { *(.debug_weaknames) }
368 .debug_funcnames 0 : { *(.debug_funcnames) }
369 .debug_typenames 0 : { *(.debug_typenames) }
370 .debug_varnames 0 : { *(.debug_varnames) }
372 ${STACK_ADDR+${STACK}}
374 ${RELOCATING+${OTHER_END_SYMBOLS}}
375 ${RELOCATING+${STACKNOTE}}