1#
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
5#		empty.
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
18#		.text section.
19#	DATA_START_SYMBOLS - symbols that appear at the start of the
20#		.data section.
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.
40#
41# When adding sections, do note that the names of some sections are used
42# when specifying the start address of the next.
43#
44
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:
52#
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
63#  .tdata	.gnu.linkonce.td.foo
64#  .tbss	.gnu.linkonce.tb.foo
65#
66#  Each of these can also have corresponding .rel.* and .rela.* sections.
67
68test -z "$ENTRY" && ENTRY=_start
69test -z "${BIG_OUTPUT_FORMAT}" && BIG_OUTPUT_FORMAT=${OUTPUT_FORMAT}
70test -z "${LITTLE_OUTPUT_FORMAT}" && LITTLE_OUTPUT_FORMAT=${OUTPUT_FORMAT}
71if [ -z "$MACHINE" ]; then OUTPUT_ARCH=${ARCH}; else OUTPUT_ARCH=${ARCH}:${MACHINE}; fi
72test -z "${ELFSIZE}" && ELFSIZE=32
73test -z "${ALIGNMENT}" && ALIGNMENT="${ELFSIZE} / 8"
74test "$LD_FLAG" = "N" && DATA_ADDR=.
75test -n "$CREATE_SHLIB" && test -n "$SHLIB_DATA_ADDR" && COMMONPAGESIZE=""
76test -z "$CREATE_SHLIB" && test -n "$DATA_ADDR" && COMMONPAGESIZE=""
77DATA_SEGMENT_ALIGN="ALIGN(${MAXPAGESIZE}) + (. & (${MAXPAGESIZE} - 1))"
78DATA_SEGMENT_END=""
79if test -n "${COMMONPAGESIZE}"; then
80  DATA_SEGMENT_ALIGN="DATA_SEGMENT_ALIGN(${MAXPAGESIZE}, ${COMMONPAGESIZE})"
81  DATA_SEGMENT_END=". = DATA_SEGMENT_END (.);"
82fi
83INTERP=".interp       ${RELOCATING-0} : { *(.interp) }"
84PLT=".plt          ${RELOCATING-0} : { *(.plt) }"
85DYNAMIC=".dynamic      ${RELOCATING-0} : { *(.dynamic) }"
86RODATA=".rodata       ${RELOCATING-0} : { *(.rodata${RELOCATING+ .rodata.* .gnu.linkonce.r.*}) }"
87if test -z "${NO_SMALL_DATA}"; then
88  SBSS=".sbss         ${RELOCATING-0} :
89  {
90    ${RELOCATING+PROVIDE (__sbss_start = .);}
91    ${RELOCATING+PROVIDE (___sbss_start = .);}
92    *(.dynsbss)
93    *(.sbss${RELOCATING+ .sbss.* .gnu.linkonce.sb.*})
94    *(.scommon)
95    ${RELOCATING+PROVIDE (__sbss_end = .);}
96    ${RELOCATING+PROVIDE (___sbss_end = .);}
97  }"
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} :
103  {
104    ${RELOCATING+${SDATA_START_SYMBOLS}}
105    *(.sdata${RELOCATING+ .sdata.* .gnu.linkonce.s.*})
106  }"
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.*}) }"
116fi
117CTOR=".ctors        ${CONSTRUCTING-0} :
118  {
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
128       is in.  */
129
130    KEEP (*crtbegin.o(.ctors))
131
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 */
136
137    KEEP (*(EXCLUDE_FILE (*crtend.o $OTHER_EXCLUDE_FILES) .ctors))
138    KEEP (*(SORT(.ctors.*)))
139    KEEP (*(.ctors))
140    ${CONSTRUCTING+${CTOR_END}}
141  }"
142DTOR=".dtors        ${CONSTRUCTING-0} :
143  {
144    ${CONSTRUCTING+${DTOR_START}}
145    KEEP (*crtbegin.o(.dtors))
146    KEEP (*(EXCLUDE_FILE (*crtend.o $OTHER_EXCLUDE_FILES) .dtors))
147    KEEP (*(SORT(.dtors.*)))
148    KEEP (*(.dtors))
149    ${CONSTRUCTING+${DTOR_END}}
150  }"
151STACK="  .stack        ${RELOCATING-0}${RELOCATING+${STACK_ADDR}} :
152  {
153    ${RELOCATING+_stack = .;}
154    *(.stack)
155  }"
156
157# if this is for an embedded system, don't add SIZEOF_HEADERS.
158if [ -z "$EMBEDDED" ]; then
159   test -z "${TEXT_BASE_ADDRESS}" && TEXT_BASE_ADDRESS="${TEXT_START_ADDR} + SIZEOF_HEADERS"
160else
161   test -z "${TEXT_BASE_ADDRESS}" && TEXT_BASE_ADDRESS="${TEXT_START_ADDR}"
162fi
163
164cat <<EOF
165OUTPUT_FORMAT("${OUTPUT_FORMAT}", "${BIG_OUTPUT_FORMAT}",
166	      "${LITTLE_OUTPUT_FORMAT}")
167OUTPUT_ARCH(${OUTPUT_ARCH})
168ENTRY(${ENTRY})
169
170${RELOCATING+${LIB_SEARCH_DIRS}}
171${RELOCATING+/* Do we need any of these for elf?
172   __DYNAMIC = 0; ${STACKZERO+${STACKZERO}} ${SHLIB_PATH+${SHLIB_PATH}}  */}
173${RELOCATING+${EXECUTABLE_SYMBOLS}}
174${RELOCATING+${INPUT_FILES}}
175${RELOCATING- /* For some reason, the Solaris linker makes bad executables
176  if gld -r is used and the intermediate file has sections starting
177  at non-zero addresses.  Could be a Solaris ld bug, could be a GNU ld
178  bug.  But for now assigning the zero vmas works.  */}
179
180SECTIONS
181{
182  /* Read-only sections, merged into text segment: */
183  ${CREATE_SHLIB-${RELOCATING+. = ${TEXT_BASE_ADDRESS};}}
184  ${CREATE_SHLIB+${RELOCATING+. = ${SHLIB_TEXT_START_ADDR:-0} + SIZEOF_HEADERS;}}
185  ${CREATE_SHLIB-${INTERP}}
186  ${INITIAL_READONLY_SECTIONS}
187  ${TEXT_DYNAMIC+${DYNAMIC}}
188  .hash         ${RELOCATING-0} : { *(.hash) }
189  .dynsym       ${RELOCATING-0} : { *(.dynsym) }
190  .dynstr       ${RELOCATING-0} : { *(.dynstr) }
191  .gnu.version  ${RELOCATING-0} : { *(.gnu.version) }
192  .gnu.version_d ${RELOCATING-0}: { *(.gnu.version_d) }
193  .gnu.version_r ${RELOCATING-0}: { *(.gnu.version_r) }
194
195EOF
196if [ "x$COMBRELOC" = x ]; then
197  COMBRELOCCAT=cat
198else
199  COMBRELOCCAT="cat > $COMBRELOC"
200fi
201eval $COMBRELOCCAT <<EOF
202  .rel.init     ${RELOCATING-0} : { *(.rel.init) }
203  .rela.init    ${RELOCATING-0} : { *(.rela.init) }
204  .rel.text     ${RELOCATING-0} : { *(.rel.text${RELOCATING+ .rel.text.* .rel.gnu.linkonce.t.*}) }
205  .rela.text    ${RELOCATING-0} : { *(.rela.text${RELOCATING+ .rela.text.* .rela.gnu.linkonce.t.*}) }
206  .rel.fini     ${RELOCATING-0} : { *(.rel.fini) }
207  .rela.fini    ${RELOCATING-0} : { *(.rela.fini) }
208  .rel.rodata   ${RELOCATING-0} : { *(.rel.rodata${RELOCATING+ .rel.rodata.* .rel.gnu.linkonce.r.*}) }
209  .rela.rodata  ${RELOCATING-0} : { *(.rela.rodata${RELOCATING+ .rela.rodata.* .rela.gnu.linkonce.r.*}) }
210  ${OTHER_READONLY_RELOC_SECTIONS}
211  .rel.data     ${RELOCATING-0} : { *(.rel.data${RELOCATING+ .rel.data.* .rel.gnu.linkonce.d.*}) }
212  .rela.data    ${RELOCATING-0} : { *(.rela.data${RELOCATING+ .rela.data.* .rela.gnu.linkonce.d.*}) }
213  .rel.tdata	${RELOCATING-0} : { *(.rel.tdata${RELOCATING+ .rel.tdata.* .rel.gnu.linkonce.td.*}) }
214  .rela.tdata	${RELOCATING-0} : { *(.rela.tdata${RELOCATING+ .rela.tdata.* .rela.gnu.linkonce.td.*}) }
215  .rel.tbss	${RELOCATING-0} : { *(.rel.tbss${RELOCATING+ .rel.tbss.* .rel.gnu.linkonce.tb.*}) }
216  .rela.tbss	${RELOCATING-0} : { *(.rela.tbss${RELOCATING+ .rela.tbss.* .rela.gnu.linkonce.tb.*}) }
217  .rel.ctors    ${RELOCATING-0} : { *(.rel.ctors) }
218  .rela.ctors   ${RELOCATING-0} : { *(.rela.ctors) }
219  .rel.dtors    ${RELOCATING-0} : { *(.rel.dtors) }
220  .rela.dtors   ${RELOCATING-0} : { *(.rela.dtors) }
221  .rel.got      ${RELOCATING-0} : { *(.rel.got) }
222  .rela.got     ${RELOCATING-0} : { *(.rela.got) }
223  ${OTHER_GOT_RELOC_SECTIONS}
224  ${REL_SDATA}
225  ${REL_SBSS}
226  ${REL_SDATA2}
227  ${REL_SBSS2}
228  .rel.bss      ${RELOCATING-0} : { *(.rel.bss${RELOCATING+ .rel.bss.* .rel.gnu.linkonce.b.*}) }
229  .rela.bss     ${RELOCATING-0} : { *(.rela.bss${RELOCATING+ .rela.bss.* .rela.gnu.linkonce.b.*}) }
230EOF
231if [ -n "$COMBRELOC" ]; then
232cat <<EOF
233  .rel.dyn      ${RELOCATING-0} :
234    {
235EOF
236sed -e '/^[ 	]*[{}][ 	]*$/d;/:[ 	]*$/d;/\.rela\./d;s/^.*: { *\(.*\)}$/      \1/' $COMBRELOC
237cat <<EOF
238    }
239  .rela.dyn     ${RELOCATING-0} :
240    {
241EOF
242sed -e '/^[ 	]*[{}][ 	]*$/d;/:[ 	]*$/d;/\.rel\./d;s/^.*: { *\(.*\)}/      \1/' $COMBRELOC
243cat <<EOF
244    }
245EOF
246fi
247cat <<EOF
248  .rel.plt      ${RELOCATING-0} : { *(.rel.plt) }
249  .rela.plt     ${RELOCATING-0} : { *(.rela.plt) }
250  ${OTHER_PLT_RELOC_SECTIONS}
251
252  .init         ${RELOCATING-0} :
253  {
254    ${RELOCATING+${INIT_START}}
255    KEEP (*(.init))
256    ${RELOCATING+${INIT_END}}
257  } =${NOP-0}
258
259  ${DATA_PLT-${BSS_PLT-${PLT}}}
260  .text         ${RELOCATING-0} :
261  {
262    ${RELOCATING+${TEXT_START_SYMBOLS}}
263    *(.text .stub${RELOCATING+ .text.* .gnu.linkonce.t.*})
264    /* .gnu.warning sections are handled specially by elf32.em.  */
265    *(.gnu.warning)
266    ${RELOCATING+${OTHER_TEXT_SECTIONS}}
267  } =${NOP-0}
268  .fini         ${RELOCATING-0} :
269  {
270    ${RELOCATING+${FINI_START}}
271    KEEP (*(.fini))
272    ${RELOCATING+${FINI_END}}
273  } =${NOP-0}
274  ${RELOCATING+PROVIDE (__etext = .);}
275  ${RELOCATING+PROVIDE (_etext = .);}
276  ${RELOCATING+PROVIDE (etext = .);}
277  ${WRITABLE_RODATA-${RODATA}}
278  .rodata1      ${RELOCATING-0} : { *(.rodata1) }
279  ${CREATE_SHLIB-${SDATA2}}
280  ${CREATE_SHLIB-${SBSS2}}
281  ${OTHER_READONLY_SECTIONS}
282  .eh_frame_hdr : { *(.eh_frame_hdr) }
283
284  /* Adjust the address for the data segment.  We want to adjust up to
285     the same address within the page on the next page up.  */
286  ${CREATE_SHLIB-${RELOCATING+. = ${DATA_ADDR-${DATA_SEGMENT_ALIGN}};}}
287  ${CREATE_SHLIB+${RELOCATING+. = ${SHLIB_DATA_ADDR-${DATA_SEGMENT_ALIGN}};}}
288
289  /* Ensure the __preinit_array_start label is properly aligned.  We
290     could instead move the label definition inside the section, but
291     the linker would then create the section even if it turns out to
292     be empty, which isn't pretty.  */
293  ${RELOCATING+. = ALIGN(${ALIGNMENT});}
294  ${RELOCATING+${CREATE_SHLIB-PROVIDE (__preinit_array_start = .);}}
295  .preinit_array   ${RELOCATING-0} : { *(.preinit_array) }
296  ${RELOCATING+${CREATE_SHLIB-PROVIDE (__preinit_array_end = .);}}
297
298  ${RELOCATING+${CREATE_SHLIB-PROVIDE (__init_array_start = .);}}
299  .init_array   ${RELOCATING-0} : { *(.init_array) }
300  ${RELOCATING+${CREATE_SHLIB-PROVIDE (__init_array_end = .);}}
301
302  ${RELOCATING+${CREATE_SHLIB-PROVIDE (__fini_array_start = .);}}
303  .fini_array   ${RELOCATING-0} : { *(.fini_array) }
304  ${RELOCATING+${CREATE_SHLIB-PROVIDE (__fini_array_end = .);}}
305
306  .data         ${RELOCATING-0} :
307  {
308    ${RELOCATING+${DATA_START_SYMBOLS}}
309    *(.data${RELOCATING+ .data.* .gnu.linkonce.d.*})
310    ${CONSTRUCTING+SORT(CONSTRUCTORS)}
311  }
312  .data1        ${RELOCATING-0} : { *(.data1) }
313  .tdata	${RELOCATING-0} : { *(.tdata${RELOCATING+ .tdata.* .gnu.linkonce.td.*}) }
314  .tbss		${RELOCATING-0} : { *(.tbss${RELOCATING+ .tbss.* .gnu.linkonce.tb.*})${RELOCATING+ *(.tcommon)} }
315  .eh_frame     ${RELOCATING-0} : { KEEP (*(.eh_frame)) }
316  .gcc_except_table ${RELOCATING-0} : { *(.gcc_except_table) }
317  ${WRITABLE_RODATA+${RODATA}}
318  ${OTHER_READWRITE_SECTIONS}
319  ${TEXT_DYNAMIC-${DYNAMIC}}
320  ${RELOCATING+${CTOR}}
321  ${RELOCATING+${DTOR}}
322  .jcr          ${RELOCATING-0} : { KEEP (*(.jcr)) }
323  ${DATA_PLT+${PLT}}
324  ${RELOCATING+${OTHER_GOT_SYMBOLS}}
325  .got          ${RELOCATING-0} : { *(.got.plt) *(.got) }
326  ${OTHER_GOT_SECTIONS}
327  ${CREATE_SHLIB+${SDATA2}}
328  ${CREATE_SHLIB+${SBSS2}}
329  ${SDATA}
330  ${OTHER_SDATA_SECTIONS}
331  ${RELOCATING+_edata = .;}
332  ${RELOCATING+PROVIDE (edata = .);}
333  ${RELOCATING+__bss_start = .;}
334  ${RELOCATING+${OTHER_BSS_SYMBOLS}}
335  ${SBSS}
336  ${BSS_PLT+${PLT}}
337  .bss          ${RELOCATING-0} :
338  {
339   *(.dynbss)
340   *(.bss${RELOCATING+ .bss.* .gnu.linkonce.b.*})
341   *(COMMON)
342   /* Align here to ensure that the .bss section occupies space up to
343      _end.  Align after .bss to ensure correct alignment even if the
344      .bss section disappears because there are no input sections.  */
345   ${RELOCATING+. = ALIGN(${ALIGNMENT});}
346  }
347  ${OTHER_BSS_SECTIONS}
348  ${RELOCATING+. = ALIGN(${ALIGNMENT});}
349  ${RELOCATING+_end = .;}
350  ${RELOCATING+${OTHER_BSS_END_SYMBOLS}}
351  ${RELOCATING+PROVIDE (end = .);}
352  ${RELOCATING+${DATA_SEGMENT_END}}
353
354  /* Stabs debugging sections.  */
355  .stab          0 : { *(.stab) }
356  .stabstr       0 : { *(.stabstr) }
357  .stab.excl     0 : { *(.stab.excl) }
358  .stab.exclstr  0 : { *(.stab.exclstr) }
359  .stab.index    0 : { *(.stab.index) }
360  .stab.indexstr 0 : { *(.stab.indexstr) }
361
362  .comment       0 : { *(.comment) }
363
364  /* DWARF debug sections.
365     Symbols in the DWARF debugging sections are relative to the beginning
366     of the section so we begin them at 0.  */
367
368  /* DWARF 1 */
369  .debug          0 : { *(.debug) }
370  .line           0 : { *(.line) }
371
372  /* GNU DWARF 1 extensions */
373  .debug_srcinfo  0 : { *(.debug_srcinfo) }
374  .debug_sfnames  0 : { *(.debug_sfnames) }
375
376  /* DWARF 1.1 and DWARF 2 */
377  .debug_aranges  0 : { *(.debug_aranges) }
378  .debug_pubnames 0 : { *(.debug_pubnames) }
379
380  /* DWARF 2 */
381  .debug_info     0 : { *(.debug_info .gnu.linkonce.wi.*) }
382  .debug_abbrev   0 : { *(.debug_abbrev) }
383  .debug_line     0 : { *(.debug_line) }
384  .debug_frame    0 : { *(.debug_frame) }
385  .debug_str      0 : { *(.debug_str) }
386  .debug_loc      0 : { *(.debug_loc) }
387  .debug_macinfo  0 : { *(.debug_macinfo) }
388
389  /* SGI/MIPS DWARF 2 extensions */
390  .debug_weaknames 0 : { *(.debug_weaknames) }
391  .debug_funcnames 0 : { *(.debug_funcnames) }
392  .debug_typenames 0 : { *(.debug_typenames) }
393  .debug_varnames  0 : { *(.debug_varnames) }
394
395  ${STACK_ADDR+${STACK}}
396  ${OTHER_SECTIONS}
397  ${RELOCATING+${OTHER_END_SYMBOLS}}
398}
399EOF
400