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