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.
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:
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
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 INTERP=".interp ${RELOCATING-0} : { *(.interp) }"
74 PLT=".plt ${RELOCATING-0} : { *(.plt) }"
75 DYNAMIC=".dynamic ${RELOCATING-0} : { *(.dynamic) }"
76 RODATA=".rodata ${RELOCATING-0} : { *(.rodata${RELOCATING+ .rodata.* .gnu.linkonce.r.*}) }"
77 if test -z "${NO_SMALL_DATA}"; then
78 SBSS=".sbss ${RELOCATING-0} :
80 ${RELOCATING+PROVIDE (__sbss_start = .);}
81 ${RELOCATING+PROVIDE (___sbss_start = .);}
83 *(.sbss${RELOCATING+ .sbss.* .gnu.linkonce.sb.*})
85 ${RELOCATING+PROVIDE (__sbss_end = .);}
86 ${RELOCATING+PROVIDE (___sbss_end = .);}
88 SBSS2=".sbss2 ${RELOCATING-0} : { *(.sbss2${RELOCATING+ .sbss2.* .gnu.linkonce.sb2.*}) }"
89 SDATA="/* We want the small data sections together, so single-instruction offsets
90 can access them all, and initialized data all before uninitialized, so
91 we can shorten the on-disk segment size. */
92 .sdata ${RELOCATING-0} :
94 ${RELOCATING+${SDATA_START_SYMBOLS}}
95 *(.sdata${RELOCATING+ .sdata.* .gnu.linkonce.s.*})
97 SDATA2=".sdata2 ${RELOCATING-0} : { *(.sdata2${RELOCATING+ .sdata2.* .gnu.linkonce.s2.*}) }"
98 REL_SDATA=".rel.sdata ${RELOCATING-0} : { *(.rel.sdata${RELOCATING+ .rel.sdata.* .rel.gnu.linkonce.s.*}) }
99 .rela.sdata ${RELOCATING-0} : { *(.rela.sdata${RELOCATING+ .rela.sdata.* .rela.gnu.linkonce.s.*}) }"
100 REL_SBSS=".rel.sbss ${RELOCATING-0} : { *(.rel.sbss${RELOCATING+ .rel.sbss.* .rel.gnu.linkonce.sb.*}) }
101 .rela.sbss ${RELOCATING-0} : { *(.rela.sbss${RELOCATING+ .rela.sbss.* .rela.gnu.linkonce.sb.*}) }"
102 REL_SDATA2=".rel.sdata2 ${RELOCATING-0} : { *(.rel.sdata2${RELOCATING+ .rel.sdata2.* .rel.gnu.linkonce.s2.*}) }
103 .rela.sdata2 ${RELOCATING-0} : { *(.rela.sdata2${RELOCATING+ .rela.sdata2.* .rela.gnu.linkonce.s2.*}) }"
104 REL_SBSS2=".rel.sbss2 ${RELOCATING-0} : { *(.rel.sbss2${RELOCATING+ .rel.sbss2.* .rel.gnu.linkonce.sb2.*}) }
105 .rela.sbss2 ${RELOCATING-0} : { *(.rela.sbss2${RELOCATING+ .rela.sbss2.* .rela.gnu.linkonce.sb2.*}) }"
107 CTOR=".ctors ${CONSTRUCTING-0} :
109 ${CONSTRUCTING+${CTOR_START}}
110 /* gcc uses crtbegin.o to find the start of
111 the constructors, so we make sure it is
112 first. Because this is a wildcard, it
113 doesn't matter if the user does not
114 actually link against crtbegin.o; the
115 linker won't look for a file to match a
116 wildcard. The wildcard also means that it
117 doesn't matter which directory crtbegin.o
120 KEEP (*crtbegin.o(.ctors))
122 /* We don't want to include the .ctor section from
123 from the crtend.o file until after the sorted ctors.
124 The .ctor section from the crtend file contains the
125 end of ctors marker and it must be last */
127 KEEP (*(EXCLUDE_FILE (*crtend.o $OTHER_EXCLUDE_FILES) .ctors))
128 KEEP (*(SORT(.ctors.*)))
130 ${CONSTRUCTING+${CTOR_END}}
132 DTOR=".dtors ${CONSTRUCTING-0} :
134 ${CONSTRUCTING+${DTOR_START}}
135 KEEP (*crtbegin.o(.dtors))
136 KEEP (*(EXCLUDE_FILE (*crtend.o $OTHER_EXCLUDE_FILES) .dtors))
137 KEEP (*(SORT(.dtors.*)))
139 ${CONSTRUCTING+${DTOR_END}}
141 STACK=" .stack ${RELOCATING-0}${RELOCATING+${STACK_ADDR}} :
143 ${RELOCATING+_stack = .;}
147 # if this is for an embedded system, don't add SIZEOF_HEADERS.
148 if [ -z "$EMBEDDED" ]; then
149 test -z "${TEXT_BASE_ADDRESS}" && TEXT_BASE_ADDRESS="${TEXT_START_ADDR} + SIZEOF_HEADERS"
151 test -z "${TEXT_BASE_ADDRESS}" && TEXT_BASE_ADDRESS="${TEXT_START_ADDR}"
155 OUTPUT_FORMAT("${OUTPUT_FORMAT}", "${BIG_OUTPUT_FORMAT}",
156 "${LITTLE_OUTPUT_FORMAT}")
157 OUTPUT_ARCH(${OUTPUT_ARCH})
160 ${RELOCATING+${LIB_SEARCH_DIRS}}
161 ${RELOCATING+/* Do we need any of these for elf?
162 __DYNAMIC = 0; ${STACKZERO+${STACKZERO}} ${SHLIB_PATH+${SHLIB_PATH}} */}
163 ${RELOCATING+${EXECUTABLE_SYMBOLS}}
164 ${RELOCATING+${INPUT_FILES}}
165 ${RELOCATING- /* For some reason, the Solaris linker makes bad executables
166 if gld -r is used and the intermediate file has sections starting
167 at non-zero addresses. Could be a Solaris ld bug, could be a GNU ld
168 bug. But for now assigning the zero vmas works. */}
172 /* Read-only sections, merged into text segment: */
173 ${CREATE_SHLIB-${RELOCATING+. = ${TEXT_BASE_ADDRESS};}}
174 ${CREATE_SHLIB+${RELOCATING+. = ${SHLIB_TEXT_START_ADDR:-0} + SIZEOF_HEADERS;}}
175 ${CREATE_SHLIB-${INTERP}}
176 ${INITIAL_READONLY_SECTIONS}
177 ${TEXT_DYNAMIC+${DYNAMIC}}
178 .hash ${RELOCATING-0} : { *(.hash) }
179 .dynsym ${RELOCATING-0} : { *(.dynsym) }
180 .dynstr ${RELOCATING-0} : { *(.dynstr) }
181 .gnu.version ${RELOCATING-0} : { *(.gnu.version) }
182 .gnu.version_d ${RELOCATING-0}: { *(.gnu.version_d) }
183 .gnu.version_r ${RELOCATING-0}: { *(.gnu.version_r) }
186 if [ "x$COMBRELOC" = x ]; then
189 COMBRELOCCAT="cat > $COMBRELOC"
191 eval $COMBRELOCCAT <<EOF
192 .rel.init ${RELOCATING-0} : { *(.rel.init) }
193 .rela.init ${RELOCATING-0} : { *(.rela.init) }
194 .rel.text ${RELOCATING-0} : { *(.rel.text${RELOCATING+ .rel.text.* .rel.gnu.linkonce.t.*}) }
195 .rela.text ${RELOCATING-0} : { *(.rela.text${RELOCATING+ .rela.text.* .rela.gnu.linkonce.t.*}) }
196 .rel.fini ${RELOCATING-0} : { *(.rel.fini) }
197 .rela.fini ${RELOCATING-0} : { *(.rela.fini) }
198 .rel.rodata ${RELOCATING-0} : { *(.rel.rodata${RELOCATING+ .rel.rodata.* .rel.gnu.linkonce.r.*}) }
199 .rela.rodata ${RELOCATING-0} : { *(.rela.rodata${RELOCATING+ .rela.rodata.* .rela.gnu.linkonce.r.*}) }
200 ${OTHER_READONLY_RELOC_SECTIONS}
201 .rel.data ${RELOCATING-0} : { *(.rel.data${RELOCATING+ .rel.data.* .rel.gnu.linkonce.d.*}) }
202 .rela.data ${RELOCATING-0} : { *(.rela.data${RELOCATING+ .rela.data.* .rela.gnu.linkonce.d.*}) }
203 .rel.ctors ${RELOCATING-0} : { *(.rel.ctors) }
204 .rela.ctors ${RELOCATING-0} : { *(.rela.ctors) }
205 .rel.dtors ${RELOCATING-0} : { *(.rel.dtors) }
206 .rela.dtors ${RELOCATING-0} : { *(.rela.dtors) }
207 .rel.got ${RELOCATING-0} : { *(.rel.got) }
208 .rela.got ${RELOCATING-0} : { *(.rela.got) }
209 ${OTHER_GOT_RELOC_SECTIONS}
214 .rel.bss ${RELOCATING-0} : { *(.rel.bss${RELOCATING+ .rel.bss.* .rel.gnu.linkonce.b.*}) }
215 .rela.bss ${RELOCATING-0} : { *(.rela.bss${RELOCATING+ .rela.bss.* .rela.gnu.linkonce.b.*}) }
217 if [ -n "$COMBRELOC" ]; then
219 .rel.dyn ${RELOCATING-0} :
222 sed -e '/^[ ]*[{}][ ]*$/d;/:[ ]*$/d;/\.rela\./d;s/^.*: { *\(.*\)}$/ \1/' $COMBRELOC
225 .rela.dyn ${RELOCATING-0} :
228 sed -e '/^[ ]*[{}][ ]*$/d;/:[ ]*$/d;/\.rel\./d;s/^.*: { *\(.*\)}/ \1/' $COMBRELOC
234 .rel.plt ${RELOCATING-0} : { *(.rel.plt) }
235 .rela.plt ${RELOCATING-0} : { *(.rela.plt) }
236 ${OTHER_PLT_RELOC_SECTIONS}
238 .init ${RELOCATING-0} :
240 ${RELOCATING+${INIT_START}}
242 ${RELOCATING+${INIT_END}}
245 ${DATA_PLT-${BSS_PLT-${PLT}}}
246 .text ${RELOCATING-0} :
248 ${RELOCATING+${TEXT_START_SYMBOLS}}
249 *(.text .stub${RELOCATING+ .text.* .gnu.linkonce.t.*})
250 /* .gnu.warning sections are handled specially by elf32.em. */
252 ${RELOCATING+${OTHER_TEXT_SECTIONS}}
254 .fini ${RELOCATING-0} :
256 ${RELOCATING+${FINI_START}}
258 ${RELOCATING+${FINI_END}}
260 ${RELOCATING+PROVIDE (__etext = .);}
261 ${RELOCATING+PROVIDE (_etext = .);}
262 ${RELOCATING+PROVIDE (etext = .);}
263 ${WRITABLE_RODATA-${RODATA}}
264 .rodata1 ${RELOCATING-0} : { *(.rodata1) }
265 ${CREATE_SHLIB-${SDATA2}}
266 ${CREATE_SHLIB-${SBSS2}}
267 ${OTHER_READONLY_SECTIONS}
268 .eh_frame_hdr : { *(.eh_frame_hdr) }
270 /* Adjust the address for the data segment. We want to adjust up to
271 the same address within the page on the next page up. */
272 ${CREATE_SHLIB-${RELOCATING+. = ${DATA_ADDR-ALIGN(${MAXPAGESIZE}) + (. & (${MAXPAGESIZE} - 1))};}}
273 ${CREATE_SHLIB+${RELOCATING+. = ${SHLIB_DATA_ADDR-ALIGN(${MAXPAGESIZE}) + (. & (${MAXPAGESIZE} - 1))};}}
275 .data ${RELOCATING-0} :
277 ${RELOCATING+${DATA_START_SYMBOLS}}
278 *(.data${RELOCATING+ .data.* .gnu.linkonce.d.*})
279 ${CONSTRUCTING+SORT(CONSTRUCTORS)}
281 .data1 ${RELOCATING-0} : { *(.data1) }
282 .eh_frame ${RELOCATING-0} : { KEEP (*(.eh_frame)) }
283 .gcc_except_table ${RELOCATING-0} : { *(.gcc_except_table) }
284 ${WRITABLE_RODATA+${RODATA}}
285 ${OTHER_READWRITE_SECTIONS}
286 ${TEXT_DYNAMIC-${DYNAMIC}}
287 ${RELOCATING+${CTOR}}
288 ${RELOCATING+${DTOR}}
289 .jcr ${RELOCATING-0} : { KEEP (*(.jcr)) }
291 ${RELOCATING+${OTHER_GOT_SYMBOLS}}
292 .got ${RELOCATING-0} : { *(.got.plt) *(.got) }
293 ${OTHER_GOT_SECTIONS}
294 ${CREATE_SHLIB+${SDATA2}}
295 ${CREATE_SHLIB+${SBSS2}}
297 ${OTHER_SDATA_SECTIONS}
298 ${RELOCATING+_edata = .;}
299 ${RELOCATING+PROVIDE (edata = .);}
300 ${RELOCATING+__bss_start = .;}
301 ${RELOCATING+${OTHER_BSS_SYMBOLS}}
304 .bss ${RELOCATING-0} :
307 *(.bss${RELOCATING+ .bss.* .gnu.linkonce.b.*})
309 /* Align here to ensure that the .bss section occupies space up to
310 _end. Align after .bss to ensure correct alignment even if the
311 .bss section disappears because there are no input sections. */
312 ${RELOCATING+. = ALIGN(${ALIGNMENT});}
314 ${OTHER_BSS_SECTIONS}
315 ${RELOCATING+. = ALIGN(${ALIGNMENT});}
316 ${RELOCATING+_end = .;}
317 ${RELOCATING+${OTHER_BSS_END_SYMBOLS}}
318 ${RELOCATING+PROVIDE (end = .);}
320 /* Stabs debugging sections. */
321 .stab 0 : { *(.stab) }
322 .stabstr 0 : { *(.stabstr) }
323 .stab.excl 0 : { *(.stab.excl) }
324 .stab.exclstr 0 : { *(.stab.exclstr) }
325 .stab.index 0 : { *(.stab.index) }
326 .stab.indexstr 0 : { *(.stab.indexstr) }
328 .comment 0 : { *(.comment) }
330 /* DWARF debug sections.
331 Symbols in the DWARF debugging sections are relative to the beginning
332 of the section so we begin them at 0. */
335 .debug 0 : { *(.debug) }
336 .line 0 : { *(.line) }
338 /* GNU DWARF 1 extensions */
339 .debug_srcinfo 0 : { *(.debug_srcinfo) }
340 .debug_sfnames 0 : { *(.debug_sfnames) }
342 /* DWARF 1.1 and DWARF 2 */
343 .debug_aranges 0 : { *(.debug_aranges) }
344 .debug_pubnames 0 : { *(.debug_pubnames) }
347 .debug_info 0 : { *(.debug_info .gnu.linkonce.wi.*) }
348 .debug_abbrev 0 : { *(.debug_abbrev) }
349 .debug_line 0 : { *(.debug_line) }
350 .debug_frame 0 : { *(.debug_frame) }
351 .debug_str 0 : { *(.debug_str) }
352 .debug_loc 0 : { *(.debug_loc) }
353 .debug_macinfo 0 : { *(.debug_macinfo) }
355 /* SGI/MIPS DWARF 2 extensions */
356 .debug_weaknames 0 : { *(.debug_weaknames) }
357 .debug_funcnames 0 : { *(.debug_funcnames) }
358 .debug_typenames 0 : { *(.debug_typenames) }
359 .debug_varnames 0 : { *(.debug_varnames) }
361 ${STACK_ADDR+${STACK}}
363 ${RELOCATING+${OTHER_END_SYMBOLS}}