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))
100 KEEP (*crtbegin?.o(.ctors))
102 /* We don't want to include the .ctor section from
103 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 *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 (*crtbegin?.o(.dtors))
117 KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o $OTHER_EXCLUDE_FILES) .dtors))
118 KEEP (*(SORT(.dtors.*)))
120 ${CONSTRUCTING+${DTOR_END}}
122 STACK=" .stack ${RELOCATING-0}${RELOCATING+${STACK_ADDR}} :
124 ${RELOCATING+_stack = .;}
128 # if this is for an embedded system, don't add SIZEOF_HEADERS.
129 if [ -z "$EMBEDDED" ]; then
130 test -z "${TEXT_BASE_ADDRESS}" && TEXT_BASE_ADDRESS="${TEXT_START_ADDR} + SIZEOF_HEADERS"
132 test -z "${TEXT_BASE_ADDRESS}" && TEXT_BASE_ADDRESS="${TEXT_START_ADDR}"
136 OUTPUT_FORMAT("${OUTPUT_FORMAT}", "${BIG_OUTPUT_FORMAT}",
137 "${LITTLE_OUTPUT_FORMAT}")
138 OUTPUT_ARCH(${OUTPUT_ARCH})
141 ${RELOCATING+${LIB_SEARCH_DIRS}}
142 ${RELOCATING+/* Do we need any of these for elf?
143 __DYNAMIC = 0; ${STACKZERO+${STACKZERO}} ${SHLIB_PATH+${SHLIB_PATH}} */}
144 ${RELOCATING+${EXECUTABLE_SYMBOLS}}
145 ${RELOCATING+${INPUT_FILES}}
146 ${RELOCATING- /* For some reason, the Solaris linker makes bad executables
147 if gld -r is used and the intermediate file has sections starting
148 at non-zero addresses. Could be a Solaris ld bug, could be a GNU ld
149 bug. But for now assigning the zero vmas works. */}
153 headers PT_PHDR PHDRS ;
156 dyn PT_LOAD FLAGS (0) ;
162 /* Read-only sections, merged into text segment: */
163 ${CREATE_SHLIB-${CREATE_PIE-${RELOCATING+. = ${TEXT_BASE_ADDRESS};}}}
164 ${CREATE_SHLIB+${RELOCATING+. = ${SHLIB_TEXT_START_ADDR:-0};}}
165 ${CREATE_PIE+${RELOCATING+. = ${SHLIB_TEXT_START_ADDR:-0};}}
166 ${CREATE_SHLIB-${INTERP}}
168 ${INITIAL_READONLY_SECTIONS}
172 ${RELOCATING+${INIT_START}}
174 ${RELOCATING+${INIT_END}}
179 ${RELOCATING+${TEXT_START_SYMBOLS}}
180 *(.text .stub${RELOCATING+ .text.* .gnu.linkonce.t.*})
181 /* .gnu.warning sections are handled specially by elf32.em. */
183 ${RELOCATING+${OTHER_TEXT_SECTIONS}}
186 ${RELOCATING+${CTOR}}
187 ${RELOCATING+${DTOR}}
191 ${RELOCATING+${FINI_START}}
193 ${RELOCATING+${FINI_END}}
196 ${RELOCATING+PROVIDE (__etext = .);}
197 ${RELOCATING+PROVIDE (_etext = .);}
198 ${RELOCATING+PROVIDE (etext = .);}
200 ${WRITABLE_RODATA-${RODATA}}
201 .rodata1 ALIGN(4) : { *(.rodata1) }
203 ExportTable ALIGN(4) : { KEEP (*(ExportTable)) }
204 .eh_frame_hdr ALIGN(4) : { *(.eh_frame_hdr) } :text
206 /* Adjust the address for the data segment. We want to adjust up to
207 the same address within the page on the next page up. */
208 . = ALIGN(128) + (. & (128 - 1));
209 .preinit_array ${RELOCATING-0} :
211 ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (__preinit_array_start = .);}}
212 KEEP (*(.preinit_array))
213 ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (__preinit_array_end = .);}}
215 .init_array ${RELOCATING-0} :
217 ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (__init_array_start = .);}}
218 KEEP (*(SORT(.init_array.*)))
219 KEEP (*(.init_array))
220 ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (__init_array_end = .);}}
222 .fini_array ${RELOCATING-0} :
224 ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (__fini_array_start = .);}}
225 KEEP (*(.fini_array))
226 KEEP (*(SORT(.fini_array.*)))
227 ${RELOCATING+${CREATE_SHLIB-PROVIDE_HIDDEN (__fini_array_end = .);}}
230 ${CREATE_SHLIB-${CREATE_PIE-${RELOCATING+. = ${DATA_ADDR-${DATA_SEGMENT_ALIGN}};}}}
231 ${CREATE_SHLIB+${RELOCATING+. = ${SHLIB_DATA_ADDR-${DATA_SEGMENT_ALIGN}};}}
232 ${CREATE_PIE+${RELOCATING+. = ${SHLIB_DATA_ADDR-${DATA_SEGMENT_ALIGN}};}}
236 ${RELOCATING+${DATA_START_SYMBOLS}}
237 *(.data${RELOCATING+ .data.* .gnu.linkonce.d.*})
238 ${CONSTRUCTING+SORT(CONSTRUCTORS)}
241 .data1 ALIGN(4) : { *(.data1) } :data
242 .tdata ALIGN(4) : { *(.tdata${RELOCATING+ .tdata.* .gnu.linkonce.td.*}) } :data
243 .tbss ALIGN(4) : { *(.tbss${RELOCATING+ .tbss.* .gnu.linkonce.tb.*})${RELOCATING+ *(.tcommon)} } :data
244 .eh_frame ALIGN(4) : { KEEP (*(.eh_frame)) } :data
245 .gcc_except_table ALIGN(4) : { *(.gcc_except_table) } :data
246 ${WRITABLE_RODATA+${RODATA}}
247 ${OTHER_READWRITE_SECTIONS}
249 ${OTHER_SDATA_SECTIONS}
250 ${RELOCATING+_edata = .;}
251 ${RELOCATING+PROVIDE (edata = .);}
252 ${RELOCATING+__bss_start = .;}
253 ${RELOCATING+${OTHER_BSS_SYMBOLS}}
258 *(.bss${RELOCATING+ .bss.* .gnu.linkonce.b.*})
260 /* Align here to ensure that the .bss section occupies space up to
261 _end. Align after .bss to ensure correct alignment even if the
262 .bss section disappears because there are no input sections. */
263 ${RELOCATING+. = ALIGN(${ALIGNMENT});}
265 ${RELOCATING+${OTHER_BSS_END_SYMBOLS}}
266 ${RELOCATING+. = ALIGN(${ALIGNMENT});}
267 ${RELOCATING+${OTHER_END_SYMBOLS}}
268 ${RELOCATING+_end = .;}
269 ${RELOCATING+PROVIDE (end = .);}
270 ${RELOCATING+${DATA_SEGMENT_END}}
272 ${TEXT_DYNAMIC-${DYNAMIC}}
273 ${TEXT_DYNAMIC+${DYNAMIC}}
274 .hash ${RELOCATING-0} : { *(.hash) } :dynamic :dyn
275 .dynsym ${RELOCATING-0} : { *(.dynsym) } :dynamic :dyn
276 .dynstr ${RELOCATING-0} : { *(.dynstr) } :dynamic :dyn
277 ${DATA_PLT-${BSS_PLT-${PLT}}}
278 .got.plt : { *(.got.plt) } :dynamic :dyn
279 .gnu.version ${RELOCATING-0} : { *(.gnu.version) }
280 .gnu.version_d ${RELOCATING-0}: { *(.gnu.version_d) }
281 .gnu.version_r ${RELOCATING-0}: { *(.gnu.version_r) }
283 if [ "x$COMBRELOC" = x ]; then
286 COMBRELOCCAT="cat > $COMBRELOC"
288 eval $COMBRELOCCAT <<EOF
289 .rel.init ${RELOCATING-0} : { *(.rel.init) }
290 .rela.init ${RELOCATING-0} : { *(.rela.init) }
291 .rel.text ${RELOCATING-0} : { *(.rel.text${RELOCATING+ .rel.text.* .rel.gnu.linkonce.t.*}) }
292 .rela.text ${RELOCATING-0} : { *(.rela.text${RELOCATING+ .rela.text.* .rela.gnu.linkonce.t.*}) }
293 .rel.fini ${RELOCATING-0} : { *(.rel.fini) }
294 .rela.fini ${RELOCATING-0} : { *(.rela.fini) }
295 .rel.rodata ${RELOCATING-0} : { *(.rel.rodata${RELOCATING+ .rel.rodata.* .rel.gnu.linkonce.r.*}) }
296 .rela.rodata ${RELOCATING-0} : { *(.rela.rodata${RELOCATING+ .rela.rodata.* .rela.gnu.linkonce.r.*}) }
297 ${OTHER_READONLY_RELOC_SECTIONS}
298 .rel.data ${RELOCATING-0} : { *(.rel.data${RELOCATING+ .rel.data.* .rel.gnu.linkonce.d.*}) }
299 .rela.data ${RELOCATING-0} : { *(.rela.data${RELOCATING+ .rela.data.* .rela.gnu.linkonce.d.*}) }
300 .rel.tdata ${RELOCATING-0} : { *(.rel.tdata${RELOCATING+ .rel.tdata.* .rel.gnu.linkonce.td.*}) }
301 .rela.tdata ${RELOCATING-0} : { *(.rela.tdata${RELOCATING+ .rela.tdata.* .rela.gnu.linkonce.td.*}) }
302 .rel.tbss ${RELOCATING-0} : { *(.rel.tbss${RELOCATING+ .rel.tbss.* .rel.gnu.linkonce.tb.*}) }
303 .rela.tbss ${RELOCATING-0} : { *(.rela.tbss${RELOCATING+ .rela.tbss.* .rela.gnu.linkonce.tb.*}) }
304 .rel.ctors ${RELOCATING-0} : { *(.rel.ctors) }
305 .rela.ctors ${RELOCATING-0} : { *(.rela.ctors) }
306 .rel.dtors ${RELOCATING-0} : { *(.rel.dtors) }
307 .rela.dtors ${RELOCATING-0} : { *(.rela.dtors) }
308 .rel.got ${RELOCATING-0} : { *(.rel.got) }
309 .rela.got ${RELOCATING-0} : { *(.rela.got) }
310 ${OTHER_GOT_RELOC_SECTIONS}
311 .rel.bss ${RELOCATING-0} : { *(.rel.bss${RELOCATING+ .rel.bss.* .rel.gnu.linkonce.b.*}) }
312 .rela.bss ${RELOCATING-0} : { *(.rela.bss${RELOCATING+ .rela.bss.* .rela.gnu.linkonce.b.*}) }
314 if [ -n "$COMBRELOC" ]; then
316 .rel.dyn ${RELOCATING-0} :
319 sed -e '/^[ ]*[{}][ ]*$/d;/:[ ]*$/d;/\.rela\./d;s/^.*: { *\(.*\)}$/ \1/' $COMBRELOC
322 .rela.dyn ${RELOCATING-0} :
325 sed -e '/^[ ]*[{}][ ]*$/d;/:[ ]*$/d;/\.rel\./d;s/^.*: { *\(.*\)}/ \1/' $COMBRELOC
331 .rel.plt ${RELOCATING-0} : { *(.rel.plt) }
332 .rela.plt ${RELOCATING-0} : { *(.rela.plt) }
333 ${OTHER_PLT_RELOC_SECTIONS}
336 /* Stabs debugging sections. */
337 .stab 0 : { *(.stab) }
338 .stabstr 0 : { *(.stabstr) }
339 .stab.excl 0 : { *(.stab.excl) }
340 .stab.exclstr 0 : { *(.stab.exclstr) }
341 .stab.index 0 : { *(.stab.index) }
342 .stab.indexstr 0 : { *(.stab.indexstr) }
344 .comment 0 : { *(.comment) }
346 /* DWARF debug sections.
347 Symbols in the DWARF debugging sections are relative to the beginning
348 of the section so we begin them at 0. */
351 .debug 0 : { *(.debug) }
352 .line 0 : { *(.line) }
354 /* GNU DWARF 1 extensions */
355 .debug_srcinfo 0 : { *(.debug_srcinfo) }
356 .debug_sfnames 0 : { *(.debug_sfnames) }
358 /* DWARF 1.1 and DWARF 2 */
359 .debug_aranges 0 : { *(.debug_aranges) }
360 .debug_pubnames 0 : { *(.debug_pubnames) }
363 .debug_info 0 : { *(.debug_info .gnu.linkonce.wi.*) }
364 .debug_abbrev 0 : { *(.debug_abbrev) }
365 .debug_line 0 : { *(.debug_line) }
366 .debug_frame 0 : { *(.debug_frame) }
367 .debug_str 0 : { *(.debug_str) }
368 .debug_loc 0 : { *(.debug_loc) }
369 .debug_macinfo 0 : { *(.debug_macinfo) }
371 /* SGI/MIPS DWARF 2 extensions */
372 .debug_weaknames 0 : { *(.debug_weaknames) }
373 .debug_funcnames 0 : { *(.debug_funcnames) }
374 .debug_typenames 0 : { *(.debug_typenames) }
375 .debug_varnames 0 : { *(.debug_varnames) }
377 ${STACK_ADDR+${STACK}}
379 ${RELOCATING+${OTHER_SYMBOLS}}
380 ${RELOCATING+${STACKNOTE}}