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_SECTIONS - at the end
12 # EXECUTABLE_SYMBOLS - symbols that must be defined for an
13 # executable (e.g., _DYNAMIC_LINK)
14 # TEXT_START_SYMBOLS - symbols that appear at the start of the
16 # DATA_START_SYMBOLS - symbols that appear at the start of the
18 # OTHER_GOT_SYMBOLS - symbols defined just before .got.
19 # OTHER_GOT_SECTIONS - sections just after .got.
20 # OTHER_SDATA_SECTIONS - sections just after .sdata.
21 # OTHER_BSS_SYMBOLS - symbols that appear at the start of the
22 # .bss section besides __bss_start.
23 # DATA_PLT - .plt should be in data segment, not text segment.
24 # BSS_PLT - .plt should be in bss segment
25 # TEXT_DYNAMIC - .dynamic in text segment, not data segment.
26 # EMBEDDED - whether this is for an embedded system.
27 # SHLIB_TEXT_START_ADDR - if set, add to SIZEOF_HEADERS to set
28 # start address of shared library.
29 # INPUT_FILES - INPUT command of files to always include
30 # WRITABLE_RODATA - if set, the .rodata section should be writable
31 # INIT_START, INIT_END - statements just before and just after
32 # combination of .init sections.
33 # FINI_START, FINI_END - statements just before and just after
34 # combination of .fini sections.
35 # STACK_ADDR - start of a .stack section.
36 # OTHER_SYMBOLS - symbols to place right at the end of the script.
38 # When adding sections, do note that the names of some sections are used
39 # when specifying the start address of the next.
42 # Many sections come in three flavours. There is the 'real' section,
43 # like ".data". Then there are the per-procedure or per-variable
44 # sections, generated by -ffunction-sections and -fdata-sections in GCC,
45 # and useful for --gc-sections, which for a variable "foo" might be
46 # ".data.foo". Then there are the linkonce sections, for which the linker
47 # eliminates duplicates, which are named like ".gnu.linkonce.d.foo".
48 # The exact correspondences are:
50 # Section Linkonce section
51 # .text .gnu.linkonce.t.foo
52 # .rodata .gnu.linkonce.r.foo
53 # .data .gnu.linkonce.d.foo
54 # .bss .gnu.linkonce.b.foo
55 # .sdata .gnu.linkonce.s.foo
56 # .sbss .gnu.linkonce.sb.foo
57 # .sdata2 .gnu.linkonce.s2.foo
58 # .sbss2 .gnu.linkonce.sb2.foo
59 # .debug_info .gnu.linkonce.wi.foo
60 # .tdata .gnu.linkonce.td.foo
61 # .tbss .gnu.linkonce.tb.foo
63 # Each of these can also have corresponding .rel.* and .rela.* sections.
65 test -z "$ENTRY" && ENTRY=_start
66 test -z "${BIG_OUTPUT_FORMAT}" && BIG_OUTPUT_FORMAT=${OUTPUT_FORMAT}
67 test -z "${LITTLE_OUTPUT_FORMAT}" && LITTLE_OUTPUT_FORMAT=${OUTPUT_FORMAT}
68 if [ -z "$MACHINE" ]; then OUTPUT_ARCH=${ARCH}; else OUTPUT_ARCH=${ARCH}:${MACHINE}; fi
69 test -z "${ELFSIZE}" && ELFSIZE=32
70 test -z "${ALIGNMENT}" && ALIGNMENT="${ELFSIZE} / 8"
71 test "$LD_FLAG" = "N" && DATA_ADDR=.
72 test -n "$CREATE_SHLIB$CREATE_PIE" && test -n "$SHLIB_DATA_ADDR" && COMMONPAGESIZE=""
73 test -z "$CREATE_SHLIB$CREATE_PIE" && test -n "$DATA_ADDR" && COMMONPAGESIZE=""
74 DATA_SEGMENT_ALIGN="ALIGN(${SEGMENT_SIZE}) + (. & (${MAXPAGESIZE} - 1))"
76 if test -n "${COMMONPAGESIZE}"; then
77 DATA_SEGMENT_ALIGN="ALIGN (${SEGMENT_SIZE}) - ((${MAXPAGESIZE} - .) & (${MAXPAGESIZE} - 1)); . = DATA_SEGMENT_ALIGN (${MAXPAGESIZE}, ${COMMONPAGESIZE})"
78 DATA_SEGMENT_END=". = DATA_SEGMENT_END (.);"
80 INTERP=".interp ALIGN(4) : { *(.interp) }"
81 PLT=".plt : { *(.plt) } :dynamic :dyn"
82 DYNAMIC=".dynamic : { *(.dynamic) } :dynamic :dyn"
83 RODATA=".rodata ALIGN(4) : { *(.rodata${RELOCATING+ .rodata.* .gnu.linkonce.r.*}) }"
84 STACKNOTE="/DISCARD/ : { *(.note.GNU-stack) *(.directive) }"
85 test -z "$GOT" && GOT=".got ${RELOCATING-0} : { *(.got.plt) *(.got) } :dynamic :dyn"
86 CTOR=".ctors ALIGN(4) :
88 ${CONSTRUCTING+${CTOR_START}}
89 /* gcc uses crtbegin.o to find the start of
90 the constructors, so we make sure it is
91 first. Because this is a wildcard, it
92 doesn't matter if the user does not
93 actually link against crtbegin.o; the
94 linker won't look for a file to match a
95 wildcard. The wildcard also means that it
96 doesn't matter which directory crtbegin.o
99 KEEP (*crtbegin*.o(.ctors))
101 /* We don't want to include the .ctor section from
102 the crtend.o file until after the sorted ctors.
103 The .ctor section from the crtend file contains the
104 end of ctors marker and it must be last */
106 KEEP (*(EXCLUDE_FILE (*crtend*.o $OTHER_EXCLUDE_FILES) .ctors))
107 KEEP (*(SORT(.ctors.*)))
109 ${CONSTRUCTING+${CTOR_END}}
111 DTOR=".dtors ALIGN(4) :
113 ${CONSTRUCTING+${DTOR_START}}
114 KEEP (*crtbegin*.o(.dtors))
115 KEEP (*(EXCLUDE_FILE (*crtend*.o $OTHER_EXCLUDE_FILES) .dtors))
116 KEEP (*(SORT(.dtors.*)))
118 ${CONSTRUCTING+${DTOR_END}}
120 STACK=" .stack ${RELOCATING-0}${RELOCATING+${STACK_ADDR}} :
122 ${RELOCATING+_stack = .;}
126 # if this is for an embedded system, don't add SIZEOF_HEADERS.
127 if [ -z "$EMBEDDED" ]; then
128 test -z "${TEXT_BASE_ADDRESS}" && TEXT_BASE_ADDRESS="${TEXT_START_ADDR} + SIZEOF_HEADERS"
130 test -z "${TEXT_BASE_ADDRESS}" && TEXT_BASE_ADDRESS="${TEXT_START_ADDR}"
134 OUTPUT_FORMAT("${OUTPUT_FORMAT}", "${BIG_OUTPUT_FORMAT}",
135 "${LITTLE_OUTPUT_FORMAT}")
136 OUTPUT_ARCH(${OUTPUT_ARCH})
139 ${RELOCATING+${LIB_SEARCH_DIRS}}
140 ${RELOCATING+/* Do we need any of these for elf?
141 __DYNAMIC = 0; ${STACKZERO+${STACKZERO}} ${SHLIB_PATH+${SHLIB_PATH}} */}
142 ${RELOCATING+${EXECUTABLE_SYMBOLS}}
143 ${RELOCATING+${INPUT_FILES}}
144 ${RELOCATING- /* For some reason, the Solaris linker makes bad executables
145 if gld -r is used and the intermediate file has sections starting
146 at non-zero addresses. Could be a Solaris ld bug, could be a GNU ld
147 bug. But for now assigning the zero vmas works. */}
151 headers PT_PHDR PHDRS ;
154 dyn PT_LOAD FLAGS (0) ;
160 /* Read-only sections, merged into text segment: */
161 ${CREATE_SHLIB-${CREATE_PIE-${RELOCATING+. = ${TEXT_BASE_ADDRESS};}}}
162 ${CREATE_SHLIB+${RELOCATING+. = ${SHLIB_TEXT_START_ADDR:-0};}}
163 ${CREATE_PIE+${RELOCATING+. = ${SHLIB_TEXT_START_ADDR:-0};}}
164 ${CREATE_SHLIB-${INTERP}}
166 ${INITIAL_READONLY_SECTIONS}
170 ${RELOCATING+${INIT_START}}
172 ${RELOCATING+${INIT_END}}
177 ${RELOCATING+${TEXT_START_SYMBOLS}}
178 *(.text .stub${RELOCATING+ .text.* .gnu.linkonce.t.*})
179 /* .gnu.warning sections are handled specially by elf32.em. */
181 ${RELOCATING+${OTHER_TEXT_SECTIONS}}
184 ${RELOCATING+${CTOR}}
185 ${RELOCATING+${DTOR}}
189 ${RELOCATING+${FINI_START}}
191 ${RELOCATING+${FINI_END}}
194 ${RELOCATING+PROVIDE (__etext = .);}
195 ${RELOCATING+PROVIDE (_etext = .);}
196 ${RELOCATING+PROVIDE (etext = .);}
198 ${WRITABLE_RODATA-${RODATA}}
199 .rodata1 ALIGN(4) : { *(.rodata1) }
201 ExportTable ALIGN(4) : { KEEP (*(ExportTable)) }
202 .eh_frame_hdr ALIGN(4) : { *(.eh_frame_hdr) } :text
204 /* Adjust the address for the data segment. We want to adjust up to
205 the same address within the page on the next page up. */
206 . = ALIGN(128) + (. & (128 - 1));
207 .preinit_array ${RELOCATING-0} :
209 ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (__preinit_array_start = .);}}
210 KEEP (*(.preinit_array))
211 ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (__preinit_array_end = .);}}
213 .init_array ${RELOCATING-0} :
215 ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (__init_array_start = .);}}
216 KEEP (*(SORT(.init_array.*)))
217 KEEP (*(.init_array))
218 ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (__init_array_end = .);}}
220 .fini_array ${RELOCATING-0} :
222 ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (__fini_array_start = .);}}
223 KEEP (*(.fini_array))
224 KEEP (*(SORT(.fini_array.*)))
225 ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (__fini_array_end = .);}}
228 ${CREATE_SHLIB-${CREATE_PIE-${RELOCATING+. = ${DATA_ADDR-${DATA_SEGMENT_ALIGN}};}}}
229 ${CREATE_SHLIB+${RELOCATING+. = ${SHLIB_DATA_ADDR-${DATA_SEGMENT_ALIGN}};}}
230 ${CREATE_PIE+${RELOCATING+. = ${SHLIB_DATA_ADDR-${DATA_SEGMENT_ALIGN}};}}
234 ${RELOCATING+${DATA_START_SYMBOLS}}
235 *(.data${RELOCATING+ .data.* .gnu.linkonce.d.*})
236 ${CONSTRUCTING+SORT(CONSTRUCTORS)}
239 .data1 ALIGN(4) : { *(.data1) } :data
240 .tdata ALIGN(4) : { *(.tdata${RELOCATING+ .tdata.* .gnu.linkonce.td.*}) } :data
241 .tbss ALIGN(4) : { *(.tbss${RELOCATING+ .tbss.* .gnu.linkonce.tb.*})${RELOCATING+ *(.tcommon)} } :data
242 .eh_frame ALIGN(4) : { KEEP (*(.eh_frame)) } :data
243 .gcc_except_table ALIGN(4) : { *(.gcc_except_table) } :data
244 ${WRITABLE_RODATA+${RODATA}}
245 ${OTHER_READWRITE_SECTIONS}
247 ${OTHER_SDATA_SECTIONS}
248 ${RELOCATING+_edata = .;}
249 ${RELOCATING+PROVIDE (edata = .);}
250 ${RELOCATING+__bss_start = .;}
251 ${RELOCATING+${OTHER_BSS_SYMBOLS}}
256 *(.bss${RELOCATING+ .bss.* .gnu.linkonce.b.*})
258 /* Align here to ensure that the .bss section occupies space up to
259 _end. Align after .bss to ensure correct alignment even if the
260 .bss section disappears because there are no input sections. */
261 ${RELOCATING+. = ALIGN(${ALIGNMENT});}
263 ${RELOCATING+${OTHER_BSS_END_SYMBOLS}}
264 ${RELOCATING+. = ALIGN(${ALIGNMENT});}
265 ${RELOCATING+${OTHER_END_SYMBOLS}}
266 ${RELOCATING+_end = .;}
267 ${RELOCATING+PROVIDE (end = .);}
268 ${RELOCATING+${DATA_SEGMENT_END}}
270 ${TEXT_DYNAMIC-${DYNAMIC}}
271 ${TEXT_DYNAMIC+${DYNAMIC}}
272 .hash ${RELOCATING-0} : { *(.hash) } :dynamic :dyn
273 .dynsym ${RELOCATING-0} : { *(.dynsym) } :dynamic :dyn
274 .dynstr ${RELOCATING-0} : { *(.dynstr) } :dynamic :dyn
275 ${DATA_PLT-${BSS_PLT-${PLT}}}
276 .got.plt : { *(.got.plt) } :dynamic :dyn
277 .gnu.version ${RELOCATING-0} : { *(.gnu.version) }
278 .gnu.version_d ${RELOCATING-0}: { *(.gnu.version_d) }
279 .gnu.version_r ${RELOCATING-0}: { *(.gnu.version_r) }
281 if [ "x$COMBRELOC" = x ]; then
284 COMBRELOCCAT="cat > $COMBRELOC"
286 eval $COMBRELOCCAT <<EOF
287 .rel.init ${RELOCATING-0} : { *(.rel.init) }
288 .rela.init ${RELOCATING-0} : { *(.rela.init) }
289 .rel.text ${RELOCATING-0} : { *(.rel.text${RELOCATING+ .rel.text.* .rel.gnu.linkonce.t.*}) }
290 .rela.text ${RELOCATING-0} : { *(.rela.text${RELOCATING+ .rela.text.* .rela.gnu.linkonce.t.*}) }
291 .rel.fini ${RELOCATING-0} : { *(.rel.fini) }
292 .rela.fini ${RELOCATING-0} : { *(.rela.fini) }
293 .rel.rodata ${RELOCATING-0} : { *(.rel.rodata${RELOCATING+ .rel.rodata.* .rel.gnu.linkonce.r.*}) }
294 .rela.rodata ${RELOCATING-0} : { *(.rela.rodata${RELOCATING+ .rela.rodata.* .rela.gnu.linkonce.r.*}) }
295 ${OTHER_READONLY_RELOC_SECTIONS}
296 .rel.data ${RELOCATING-0} : { *(.rel.data${RELOCATING+ .rel.data.* .rel.gnu.linkonce.d.*}) }
297 .rela.data ${RELOCATING-0} : { *(.rela.data${RELOCATING+ .rela.data.* .rela.gnu.linkonce.d.*}) }
298 .rel.tdata ${RELOCATING-0} : { *(.rel.tdata${RELOCATING+ .rel.tdata.* .rel.gnu.linkonce.td.*}) }
299 .rela.tdata ${RELOCATING-0} : { *(.rela.tdata${RELOCATING+ .rela.tdata.* .rela.gnu.linkonce.td.*}) }
300 .rel.tbss ${RELOCATING-0} : { *(.rel.tbss${RELOCATING+ .rel.tbss.* .rel.gnu.linkonce.tb.*}) }
301 .rela.tbss ${RELOCATING-0} : { *(.rela.tbss${RELOCATING+ .rela.tbss.* .rela.gnu.linkonce.tb.*}) }
302 .rel.ctors ${RELOCATING-0} : { *(.rel.ctors) }
303 .rela.ctors ${RELOCATING-0} : { *(.rela.ctors) }
304 .rel.dtors ${RELOCATING-0} : { *(.rel.dtors) }
305 .rela.dtors ${RELOCATING-0} : { *(.rela.dtors) }
306 .rel.got ${RELOCATING-0} : { *(.rel.got) }
307 .rela.got ${RELOCATING-0} : { *(.rela.got) }
308 ${OTHER_GOT_RELOC_SECTIONS}
309 .rel.bss ${RELOCATING-0} : { *(.rel.bss${RELOCATING+ .rel.bss.* .rel.gnu.linkonce.b.*}) }
310 .rela.bss ${RELOCATING-0} : { *(.rela.bss${RELOCATING+ .rela.bss.* .rela.gnu.linkonce.b.*}) }
312 if [ -n "$COMBRELOC" ]; then
314 .rel.dyn ${RELOCATING-0} :
317 sed -e '/^[ ]*[{}][ ]*$/d;/:[ ]*$/d;/\.rela\./d;s/^.*: { *\(.*\)}$/ \1/' $COMBRELOC
320 .rela.dyn ${RELOCATING-0} :
323 sed -e '/^[ ]*[{}][ ]*$/d;/:[ ]*$/d;/\.rel\./d;s/^.*: { *\(.*\)}/ \1/' $COMBRELOC
329 .rel.plt ${RELOCATING-0} : { *(.rel.plt) }
330 .rela.plt ${RELOCATING-0} : { *(.rela.plt) }
331 ${OTHER_PLT_RELOC_SECTIONS}
334 /* Stabs debugging sections. */
335 .stab 0 : { *(.stab) }
336 .stabstr 0 : { *(.stabstr) }
337 .stab.excl 0 : { *(.stab.excl) }
338 .stab.exclstr 0 : { *(.stab.exclstr) }
339 .stab.index 0 : { *(.stab.index) }
340 .stab.indexstr 0 : { *(.stab.indexstr) }
342 .comment 0 : { *(.comment) }
344 /* DWARF debug sections.
345 Symbols in the DWARF debugging sections are relative to the beginning
346 of the section so we begin them at 0. */
349 .debug 0 : { *(.debug) }
350 .line 0 : { *(.line) }
352 /* GNU DWARF 1 extensions */
353 .debug_srcinfo 0 : { *(.debug_srcinfo) }
354 .debug_sfnames 0 : { *(.debug_sfnames) }
356 /* DWARF 1.1 and DWARF 2 */
357 .debug_aranges 0 : { *(.debug_aranges) }
358 .debug_pubnames 0 : { *(.debug_pubnames) }
361 .debug_info 0 : { *(.debug_info .gnu.linkonce.wi.*) }
362 .debug_abbrev 0 : { *(.debug_abbrev) }
363 .debug_line 0 : { *(.debug_line) }
364 .debug_frame 0 : { *(.debug_frame) }
365 .debug_str 0 : { *(.debug_str) }
366 .debug_loc 0 : { *(.debug_loc) }
367 .debug_macinfo 0 : { *(.debug_macinfo) }
369 /* SGI/MIPS DWARF 2 extensions */
370 .debug_weaknames 0 : { *(.debug_weaknames) }
371 .debug_funcnames 0 : { *(.debug_funcnames) }
372 .debug_typenames 0 : { *(.debug_typenames) }
373 .debug_varnames 0 : { *(.debug_varnames) }
375 ${STACK_ADDR+${STACK}}
377 ${RELOCATING+${OTHER_SYMBOLS}}
378 ${RELOCATING+${STACKNOTE}}