1#
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 data 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
15#		.text section.
16#	DATA_START_SYMBOLS - symbols that appear at the start of the
17#		.data section.
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#
36# When adding sections, do note that the names of some sections are used
37# when specifying the start address of the next.
38#
39
40#  Many sections come in three flavours.  There is the 'real' section,
41#  like ".data".  Then there are the per-procedure or per-variable
42#  sections, generated by -ffunction-sections and -fdata-sections in GCC,
43#  and useful for --gc-sections, which for a variable "foo" might be
44#  ".data.foo".  Then there are the linkonce sections, for which the linker
45#  eliminates duplicates, which are named like ".gnu.linkonce.d.foo".
46#  The exact correspondences are:
47#
48#  Section	Linkonce section
49#  .text	.gnu.linkonce.t.foo
50#  .rodata	.gnu.linkonce.r.foo
51#  .data	.gnu.linkonce.d.foo
52#  .bss		.gnu.linkonce.b.foo
53#  .sdata	.gnu.linkonce.s.foo
54#  .sbss	.gnu.linkonce.sb.foo
55#  .sdata2	.gnu.linkonce.s2.foo
56#  .sbss2	.gnu.linkonce.sb2.foo
57#
58#  Each of these can also have corresponding .rel.* and .rela.* sections.
59
60test -z "$ENTRY" && ENTRY=_start
61test -z "${BIG_OUTPUT_FORMAT}" && BIG_OUTPUT_FORMAT=${OUTPUT_FORMAT}
62test -z "${LITTLE_OUTPUT_FORMAT}" && LITTLE_OUTPUT_FORMAT=${OUTPUT_FORMAT}
63if [ -z "$MACHINE" ]; then OUTPUT_ARCH=${ARCH}; else OUTPUT_ARCH=${ARCH}:${MACHINE}; fi
64test -z "${ELFSIZE}" && ELFSIZE=32
65test -z "${ALIGNMENT}" && ALIGNMENT="${ELFSIZE} / 8"
66test "$LD_FLAG" = "N" && DATA_ADDR=.
67INTERP=".interp   ${RELOCATING-0} : { *(.interp) 	}"
68PLT=".plt    ${RELOCATING-0} : { *(.plt)	}"
69DYNAMIC=".dynamic     ${RELOCATING-0} : { *(.dynamic) }"
70RODATA=".rodata ${RELOCATING-0} : { *(.rodata) ${RELOCATING+*(.rodata.*)} ${RELOCATING+*(.gnu.linkonce.r.*)} }"
71SBSS2=".sbss2 ${RELOCATING-0} : { *(.sbss2) ${RELOCATING+*(.sbss2.*)} ${RELOCATING+*(.gnu.linkonce.sb2.*)} }"
72SDATA2=".sdata2 ${RELOCATING-0} : { *(.sdata2) ${RELOCATING+*(.sdata2.*)} ${RELOCATING+*(.gnu.linkonce.s2.*)} }"
73CTOR=".ctors ${CONSTRUCTING-0} :
74  {
75    ${CONSTRUCTING+${CTOR_START}}
76    /* gcc uses crtbegin.o to find the start of
77       the constructors, so we make sure it is
78       first.  Because this is a wildcard, it
79       doesn't matter if the user does not
80       actually link against crtbegin.o; the
81       linker won't look for a file to match a
82       wildcard.  The wildcard also means that it
83       doesn't matter which directory crtbegin.o
84       is in.  */
85
86    KEEP (*crtbegin.o(.ctors))
87    KEEP (*crtbegin?.o(.ctors))
88
89    /* We don't want to include the .ctor section from
90       the crtend.o file until after the sorted ctors.
91       The .ctor section from the crtend file contains the
92       end of ctors marker and it must be last */
93
94    KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o $OTHER_EXCLUDE_FILES) .ctors))
95    KEEP (*(SORT(.ctors.*)))
96    KEEP (*(.ctors))
97    ${CONSTRUCTING+${CTOR_END}}
98  }"
99
100DTOR=" .dtors       ${CONSTRUCTING-0} :
101  {
102    ${CONSTRUCTING+${DTOR_START}}
103    KEEP (*crtbegin.o(.dtors))
104    KEEP (*crtbegin?.o(.dtors))
105    KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o $OTHER_EXCLUDE_FILES) .dtors))
106    KEEP (*(SORT(.dtors.*)))
107    KEEP (*(.dtors))
108    ${CONSTRUCTING+${DTOR_END}}
109  }"
110
111# if this is for an embedded system, don't add SIZEOF_HEADERS.
112if [ -z "$EMBEDDED" ]; then
113   test -z "${TEXT_BASE_ADDRESS}" && TEXT_BASE_ADDRESS="${TEXT_START_ADDR} + SIZEOF_HEADERS"
114else
115   test -z "${TEXT_BASE_ADDRESS}" && TEXT_BASE_ADDRESS="${TEXT_START_ADDR}"
116fi
117
118cat <<EOF
119OUTPUT_FORMAT("${OUTPUT_FORMAT}", "${BIG_OUTPUT_FORMAT}",
120	      "${LITTLE_OUTPUT_FORMAT}")
121OUTPUT_ARCH(${OUTPUT_ARCH})
122${RELOCATING+ENTRY(${ENTRY})}
123
124${RELOCATING+${LIB_SEARCH_DIRS}}
125${RELOCATING+/* Do we need any of these for elf?
126   __DYNAMIC = 0; ${STACKZERO+${STACKZERO}} ${SHLIB_PATH+${SHLIB_PATH}}  */}
127${RELOCATING+${EXECUTABLE_SYMBOLS}}
128${RELOCATING+${INPUT_FILES}}
129${RELOCATING- /* For some reason, the Solaris linker makes bad executables
130  if gld -r is used and the intermediate file has sections starting
131  at non-zero addresses.  Could be a Solaris ld bug, could be a GNU ld
132  bug.  But for now assigning the zero vmas works.  */}
133
134SECTIONS
135{
136  ${CREATE_SHLIB-${RELOCATING+. = ${TEXT_BASE_ADDRESS};}}
137  ${CREATE_SHLIB+${RELOCATING+. = ${SHLIB_TEXT_START_ADDR:-0} + SIZEOF_HEADERS;}}
138  ${CREATE_SHLIB-${INTERP}}
139  ${TEXT_DYNAMIC+${DYNAMIC}}
140
141EOF
142if [ "x$COMBRELOC" = x ]; then
143  COMBRELOCCAT=cat
144else
145  COMBRELOCCAT="cat > $COMBRELOC"
146fi
147eval $COMBRELOCCAT <<EOF
148  .rel.init    ${RELOCATING-0} : { *(.rel.init)	}
149  .rela.init   ${RELOCATING-0} : { *(.rela.init)	}
150  .rel.text    ${RELOCATING-0} :
151    {
152      *(.rel.text)
153      ${RELOCATING+*(.rel.text.*)}
154      ${RELOCATING+*(.rel.gnu.linkonce.t.*)}
155    }
156  .rela.text   ${RELOCATING-0} :
157    {
158      *(.rela.text)
159      ${RELOCATING+*(.rela.text.*)}
160      ${RELOCATING+*(.rela.gnu.linkonce.t.*)}
161    }
162  .rel.fini    ${RELOCATING-0} : { *(.rel.fini)	}
163  .rela.fini   ${RELOCATING-0} : { *(.rela.fini)	}
164  .rel.rodata  ${RELOCATING-0} :
165    {
166      *(.rel.rodata)
167      ${RELOCATING+*(.rel.rodata.*)}
168      ${RELOCATING+*(.rel.gnu.linkonce.r.*)}
169    }
170  .rela.rodata ${RELOCATING-0} :
171    {
172      *(.rela.rodata)
173      ${RELOCATING+*(.rela.rodata.*)}
174      ${RELOCATING+*(.rela.gnu.linkonce.r.*)}
175    }
176  ${OTHER_READONLY_RELOC_SECTIONS}
177  .rel.data    ${RELOCATING-0} :
178    {
179      *(.rel.data)
180      ${RELOCATING+*(.rel.data.*)}
181      ${RELOCATING+*(.rel.gnu.linkonce.d.*)}
182    }
183  .rela.data   ${RELOCATING-0} :
184    {
185      *(.rela.data)
186      ${RELOCATING+*(.rela.data.*)}
187      ${RELOCATING+*(.rela.gnu.linkonce.d.*)}
188    }
189  .rel.ctors   ${RELOCATING-0} : { *(.rel.ctors)	}
190  .rela.ctors  ${RELOCATING-0} : { *(.rela.ctors)	}
191  .rel.dtors   ${RELOCATING-0} : { *(.rel.dtors)	}
192  .rela.dtors  ${RELOCATING-0} : { *(.rela.dtors)	}
193  .rel.got     ${RELOCATING-0} : { *(.rel.got)		}
194  .rela.got    ${RELOCATING-0} : { *(.rela.got)		}
195  ${OTHER_GOT_RELOC_SECTIONS}
196  .rel.sdata   ${RELOCATING-0} :
197    {
198      *(.rel.sdata)
199      ${RELOCATING+*(.rel.sdata.*)}
200      ${RELOCATING+*(.rel.gnu.linkonce.s.*)}
201    }
202  .rela.sdata   ${RELOCATING-0} :
203    {
204      *(.rela.sdata)
205      ${RELOCATING+*(.rela.sdata.*)}
206      ${RELOCATING+*(.rela.gnu.linkonce.s.*)}
207    }
208  .rel.sbss    ${RELOCATING-0} :
209    {
210      *(.rel.sbss)
211      ${RELOCATING+*(.rel.sbss.*)}
212      ${RELOCATING+*(.rel.gnu.linkonce.sb.*)}
213    }
214  .rela.sbss   ${RELOCATING-0} :
215    {
216      *(.rela.sbss)
217      ${RELOCATING+*(.rela.sbss.*)}
218      ${RELOCATING+*(.rela.gnu.linkonce.sb.*)}
219    }
220  .rel.sdata2  ${RELOCATING-0} :
221    {
222      *(.rel.sdata2)
223      ${RELOCATING+*(.rel.sdata2.*)}
224      ${RELOCATING+*(.rel.gnu.linkonce.s2.*)}
225    }
226  .rela.sdata2 ${RELOCATING-0} :
227    {
228      *(.rela.sdata2)
229      ${RELOCATING+*(.rela.sdata2.*)}
230      ${RELOCATING+*(.rela.gnu.linkonce.s2.*)}
231    }
232  .rel.sbss2   ${RELOCATING-0} :
233    {
234      *(.rel.sbss2)
235      ${RELOCATING+*(.rel.sbss2.*)}
236      ${RELOCATING+*(.rel.gnu.linkonce.sb2.*)}
237    }
238  .rela.sbss2  ${RELOCATING-0} :
239    {
240      *(.rela.sbss2)
241      ${RELOCATING+*(.rela.sbss2.*)}
242      ${RELOCATING+*(.rela.gnu.linkonce.sb2.*)}
243    }
244  .rel.bss     ${RELOCATING-0} :
245    {
246      *(.rel.bss)
247      ${RELOCATING+*(.rel.bss.*)}
248      ${RELOCATING+*(.rel.gnu.linkonce.b.*)}
249    }
250  .rela.bss    ${RELOCATING-0} :
251    {
252      *(.rela.bss)
253      ${RELOCATING+*(.rela.bss.*)}
254      ${RELOCATING+*(.rela.gnu.linkonce.b.*)}
255    }
256EOF
257if [ -n "$COMBRELOC" ]; then
258cat <<EOF
259  .rel.dyn	 :
260    {
261EOF
262sed -e '/^[ 	]*[{}][ 	]*$/d;/:[ 	]*$/d;/\.rela\./d;s/^.*: { *\(.*\)}$/      \1/' $COMBRELOC
263cat <<EOF
264    }
265  .rela.dyn	 :
266    {
267EOF
268sed -e '/^[ 	]*[{}][ 	]*$/d;/:[ 	]*$/d;/\.rel\./d;s/^.*: { *\(.*\)}/      \1/' $COMBRELOC
269cat <<EOF
270    }
271EOF
272fi
273cat <<EOF
274  .rel.plt     ${RELOCATING-0} : { *(.rel.plt)		}
275  .rela.plt    ${RELOCATING-0} : { *(.rela.plt)		}
276  ${OTHER_PLT_RELOC_SECTIONS}
277
278  .init        ${RELOCATING-0} :
279  {
280    ${RELOCATING+${INIT_START}}
281    KEEP (*(.init))
282    ${RELOCATING+${INIT_END}}
283  } =${NOP-0}
284
285  ${DATA_PLT-${BSS_PLT-${PLT}}}
286  .text    ${RELOCATING-0} :
287  {
288    ${RELOCATING+${TEXT_START_SYMBOLS}}
289    *(.text)
290    ${RELOCATING+*(.text.*)}
291    *(.stub)
292    /* .gnu.warning sections are handled specially by elf32.em.  */
293    *(.gnu.warning)
294    ${RELOCATING+*(.gnu.linkonce.t.*)}
295    ${RELOCATING+${OTHER_TEXT_SECTIONS}}
296  } =${NOP-0}
297  .fini    ${RELOCATING-0} :
298  {
299    ${RELOCATING+${FINI_START}}
300    KEEP (*(.fini))
301    ${RELOCATING+${FINI_END}}
302  } =${NOP-0}
303  ${RELOCATING+PROVIDE (__etext = .);}
304  ${RELOCATING+PROVIDE (_etext = .);}
305  ${RELOCATING+PROVIDE (etext = .);}
306
307  /* Adjust the address for the data segment.  We want to adjust up to
308     the same address within the page on the next page up.  */
309  ${CREATE_SHLIB-${RELOCATING+. = ${DATA_ADDR-ALIGN(${MAXPAGESIZE}) + (. & (${MAXPAGESIZE} - 1))};}}
310  ${CREATE_SHLIB+${RELOCATING+. = ${SHLIB_DATA_ADDR-ALIGN(${MAXPAGESIZE}) + (. & (${MAXPAGESIZE} - 1))};}}
311
312  .data  ${RELOCATING-0} :
313  {
314    ${RELOCATING+${DATA_START_SYMBOLS}}
315    *(.data)
316    ${RELOCATING+*(.data.*)}
317    ${RELOCATING+*(.gnu.linkonce.d.*)}
318    ${CONSTRUCTING+SORT(CONSTRUCTORS)}
319  }
320  .data1 ${RELOCATING-0} : { *(.data1) }
321  .eh_frame ${RELOCATING-0} :
322  {
323    ${RELOCATING+PROVIDE (__eh_frame_begin = .);}
324    *(.eh_frame)
325    LONG (0);
326    ${RELOCATING+PROVIDE (__eh_frame_end = .);}
327  } ${RELOCATING+}
328  .gcc_except_table : { *(.gcc_except_table) }
329  ${INITIAL_READONLY_SECTIONS}
330  .hash        ${RELOCATING-0} : { *(.hash)		}
331  .dynsym      ${RELOCATING-0} : { *(.dynsym)		}
332  .dynstr      ${RELOCATING-0} : { *(.dynstr)		}
333  .gnu.version ${RELOCATING-0} : { *(.gnu.version)	}
334  .gnu.version_d ${RELOCATING-0} : { *(.gnu.version_d)	}
335  .gnu.version_r ${RELOCATING-0} : { *(.gnu.version_r)	}
336  ${RODATA}
337  .rodata1 ${RELOCATING-0} : { *(.rodata1) }
338  ${CREATE_SHLIB-${SDATA2}}
339  ${CREATE_SHLIB-${SBSS2}}
340  ${RELOCATING+${OTHER_READONLY_SECTIONS}}
341  ${RELOCATING+${OTHER_READWRITE_SECTIONS}}
342  ${TEXT_DYNAMIC-${DYNAMIC}}
343  ${RELOCATING+${CTOR}}
344  ${RELOCATING+${DTOR}}
345  .jcr : { KEEP (*(.jcr)) }
346  ${DATA_PLT+${PLT}}
347  ${RELOCATING+${OTHER_GOT_SYMBOLS}}
348  .got		${RELOCATING-0} : { *(.got.plt) *(.got) }
349  ${RELOCATING+${OTHER_GOT_SECTIONS}}
350  ${CREATE_SHLIB+${SDATA2}}
351  ${CREATE_SHLIB+${SBSS2}}
352  /* We want the small data sections together, so single-instruction offsets
353     can access them all, and initialized data all before uninitialized, so
354     we can shorten the on-disk segment size.  */
355  .sdata   ${RELOCATING-0} :
356  {
357    ${RELOCATING+${SDATA_START_SYMBOLS}}
358    *(.sdata)
359    ${RELOCATING+*(.sdata.*)}
360    ${RELOCATING+*(.gnu.linkonce.s.*)}
361  }
362  ${RELOCATING+${OTHER_SDATA_SECTIONS}}
363  ${RELOCATING+_edata = .;}
364  ${RELOCATING+PROVIDE (edata = .);}
365  ${RELOCATING+__bss_start = .;}
366  ${RELOCATING+${OTHER_BSS_SYMBOLS}}
367  .sbss    ${RELOCATING-0} :
368  {
369    ${RELOCATING+PROVIDE (__sbss_start = .);}
370    ${RELOCATING+PROVIDE (___sbss_start = .);}
371    *(.dynsbss)
372    *(.sbss)
373    ${RELOCATING+*(.sbss.*)}
374    ${RELOCATING+*(.gnu.linkonce.sb.*)}
375    *(.scommon)
376    ${RELOCATING+PROVIDE (__sbss_end = .);}
377    ${RELOCATING+PROVIDE (___sbss_end = .);}
378  }
379  ${BSS_PLT+${PLT}}
380  .bss     ${RELOCATING-0} :
381  {
382   *(.dynbss)
383   *(.bss)
384   ${RELOCATING+*(.bss.*)}
385   ${RELOCATING+*(.gnu.linkonce.b.*)}
386   *(COMMON)
387   /* Align here to ensure that the .bss section occupies space up to
388      _end.  Align after .bss to ensure correct alignment even if the
389      .bss section disappears because there are no input sections.  */
390   ${RELOCATING+. = ALIGN(${ALIGNMENT});}
391  }
392  ${RELOCATING+${OTHER_BSS_END_SYMBOLS}}
393  ${RELOCATING+. = ALIGN(${ALIGNMENT});}
394  ${RELOCATING+${OTHER_END_SYMBOLS}}
395  ${RELOCATING+_end = .;}
396  ${RELOCATING+PROVIDE (end = .);}
397
398  /* Stabs debugging sections.  */
399  .stab 0 : { *(.stab) }
400  .stabstr 0 : { *(.stabstr) }
401  .stab.excl 0 : { *(.stab.excl) }
402  .stab.exclstr 0 : { *(.stab.exclstr) }
403  .stab.index 0 : { *(.stab.index) }
404  .stab.indexstr 0 : { *(.stab.indexstr) }
405
406  .comment 0 : { *(.comment) }
407
408  /* DWARF debug sections.
409     Symbols in the DWARF debugging sections are relative to the beginning
410     of the section so we begin them at 0.  */
411
412  /* DWARF 1 */
413  .debug          0 : { *(.debug) }
414  .line           0 : { *(.line) }
415
416  /* GNU DWARF 1 extensions */
417  .debug_srcinfo  0 : { *(.debug_srcinfo) }
418  .debug_sfnames  0 : { *(.debug_sfnames) }
419
420  /* DWARF 1.1 and DWARF 2 */
421  .debug_aranges  0 : { *(.debug_aranges) }
422  .debug_pubnames 0 : { *(.debug_pubnames) }
423
424  /* DWARF 2 */
425  .debug_info     0 : { *(.debug_info) *(.gnu.linkonce.wi.*) }
426  .debug_abbrev   0 : { *(.debug_abbrev) }
427  .debug_line     0 : { *(.debug_line) }
428  .debug_frame    0 : { *(.debug_frame) }
429  .debug_str      0 : { *(.debug_str) }
430  .debug_loc      0 : { *(.debug_loc) }
431  .debug_macinfo  0 : { *(.debug_macinfo) }
432
433  /* SGI/MIPS DWARF 2 extensions */
434  .debug_weaknames 0 : { *(.debug_weaknames) }
435  .debug_funcnames 0 : { *(.debug_funcnames) }
436  .debug_typenames 0 : { *(.debug_typenames) }
437  .debug_varnames  0 : { *(.debug_varnames) }
438
439  ${RELOCATING+${OTHER_RELOCATING_SECTIONS}}
440
441  /* These must appear regardless of ${RELOCATING}.  */
442  ${OTHER_SECTIONS}
443}
444EOF
445