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#	OTHER_READWRITE_SECTIONS - other than .data .bss .ctors .sdata ...
6#		(e.g., .PARISC.global)
7#	OTHER_SECTIONS - at the end
8#	EXECUTABLE_SYMBOLS - symbols that must be defined for an
9#		executable (e.g., _DYNAMIC_LINK)
10#	TEXT_START_SYMBOLS - symbols that appear at the start of the
11#		.text section.
12#	DATA_START_SYMBOLS - symbols that appear at the start of the
13#		.data section.
14#	OTHER_BSS_SYMBOLS - symbols that appear at the start of the
15#		.bss section besides __bss_start.
16#	EMBEDDED - whether this is for an embedded system. 
17#
18# When adding sections, do note that the names of some sections are used
19# when specifying the start address of the next.
20#
21test -z "$ENTRY" && ENTRY=_start
22test -z "${BIG_OUTPUT_FORMAT}" && BIG_OUTPUT_FORMAT=${OUTPUT_FORMAT}
23test -z "${LITTLE_OUTPUT_FORMAT}" && LITTLE_OUTPUT_FORMAT=${OUTPUT_FORMAT}
24if [ -z "$MACHINE" ]; then OUTPUT_ARCH=${ARCH}; else OUTPUT_ARCH=${ARCH}:${MACHINE}; fi
25test "$LD_FLAG" = "N" && DATA_ADDR=.
26
27CTOR=".ctors ${CONSTRUCTING-0} : 
28  {
29    ${CONSTRUCTING+ PROVIDE (__CTOR_LIST__ = .); }
30    ${CONSTRUCTING+${CTOR_START}}
31    KEEP (*(.ctors))
32
33    ${CONSTRUCTING+${CTOR_END}}
34    ${CONSTRUCTING+ PROVIDE(__CTOR_END__ = .); }
35  } ${RELOCATING+ > ${TEXT_MEMORY}}"
36
37DTOR="  .dtors	${CONSTRUCTING-0} :
38  {
39    ${CONSTRUCTING+ PROVIDE(__DTOR_LIST__ = .); }
40    KEEP (*(.dtors))
41    ${CONSTRUCTING+ PROVIDE(__DTOR_END__ = .); }
42  } ${RELOCATING+ > ${TEXT_MEMORY}}"
43
44
45VECTORS="
46  /* If the 'vectors_addr' symbol is defined, it indicates the start address
47     of interrupt vectors.  This depends on the 68HC11 operating mode:
48
49			Addr
50     Single chip	0xffc0
51     Extended mode	0xffc0
52     Bootstrap		0x00c0
53     Test		0xbfc0
54
55     In general, the vectors address is 0xffc0.  This can be overriden 
56     with the '-defsym vectors_addr=0xbfc0' ld option.
57
58     Note: for the bootstrap mode, the interrupt vectors are at 0xbfc0 but
59     they are redirected to 0x00c0 by the internal PROM.  Application's vectors
60     must also consist of jump instructions (see Motorola's manual).  */
61
62  PROVIDE (_vectors_addr = DEFINED (vectors_addr) ? vectors_addr : 0xffc0);
63  .vectors DEFINED (vectors_addr) ? vectors_addr : 0xffc0 :
64  {
65    KEEP (*(.vectors))
66  }"
67
68#
69# We provide two emulations: a fixed on that defines some memory banks
70# and a configurable one that includes a user provided memory definition.
71#
72case $GENERIC_BOARD in
73  yes|1|YES)
74	MEMORY_DEF="
75/* Get memory banks definition from some user configuration file.
76   This file must be located in some linker directory (search path
77   with -L<dir>). See fixed memory banks emulation script.  */
78INCLUDE memory.x;
79"
80	;;
81  *)
82MEMORY_DEF="
83/* Fixed definition of the available memory banks.
84   See generic emulation script for a user defined configuration.  */
85MEMORY
86{
87  page0 (rwx) : ORIGIN = 0x0, LENGTH = 256
88  text  (rx)  : ORIGIN = ${ROM_START_ADDR}, LENGTH = ${ROM_SIZE}
89  data        : ORIGIN = ${RAM_START_ADDR}, LENGTH = ${RAM_SIZE}
90  eeprom      : ORIGIN = ${EEPROM_START_ADDR}, LENGTH = ${EEPROM_SIZE}
91}
92
93/* Setup the stack on the top of the data memory bank.  */
94PROVIDE (_stack = ${RAM_START_ADDR} + ${RAM_SIZE} - 1);
95"
96	;;
97esac
98
99STARTUP_CODE="
100    /* Startup code.  */
101    KEEP (*(.install0))	/* Section should setup the stack pointer.  */
102    KEEP (*(.install1))	/* Place holder for applications.  */
103    KEEP (*(.install2))	/* Optional installation of data sections in RAM.  */
104    KEEP (*(.install3))	/* Place holder for applications.  */
105    KEEP (*(.install4))	/* Section that calls the main.  */
106"
107
108FINISH_CODE="
109    /* Finish code.  */
110    KEEP (*(.fini0))	/* Beginning of finish code (_exit symbol).  */
111    KEEP (*(.fini1))	/* Place holder for applications.  */
112    KEEP (*(.fini2))	/* C++ destructors.  */
113    KEEP (*(.fini3))	/* Place holder for applications.  */
114    KEEP (*(.fini4))	/* Runtime exit.  */
115"
116
117PRE_COMPUTE_DATA_SIZE="
118/* SCz: this does not work yet... This is supposed to force the loading
119   of _map_data.o (from libgcc.a) when the .data section is not empty.
120   By doing so, this should bring the code that copies the .data section
121   from ROM to RAM at init time.
122
123  ___pre_comp_data_size = SIZEOF(.data);
124  __install_data_sections = ___pre_comp_data_size > 0 ?
125		__map_data_sections : 0;
126*/
127"
128
129INSTALL_RELOC="
130  .install0 0 : { *(.install0) }
131  .install1 0 : { *(.install1) }
132  .install2 0 : { *(.install2) }
133  .install3 0 : { *(.install3) }
134  .install4 0 : { *(.install4) }
135"
136
137FINISH_RELOC="
138  .fini0 0 : { *(.fini0) }
139  .fini1 0 : { *(.fini1) }
140  .fini2 0 : { *(.fini2) }
141  .fini3 0 : { *(.fini3) }
142  .fini4 0 : { *(.fini4) }
143"
144
145BSS_DATA_RELOC="
146  .data1 0 : { *(.data1) }
147
148  /* We want the small data sections together, so single-instruction offsets
149     can access them all, and initialized data all before uninitialized, so
150     we can shorten the on-disk segment size.  */
151  .sdata   0 : { *(.sdata) }
152  .sbss    0 : { *(.sbss) }
153  .scommon 0 : { *(.scommon) }
154"
155
156SOFT_REGS_RELOC="
157  .softregs 0 : { *(.softregs) }
158"
159
160cat <<EOF
161${RELOCATING+/* Linker script for 68HC12 executable (PROM).  */}
162${RELOCATING-/* Linker script for 68HC12 object file (ld -r).  */}
163
164OUTPUT_FORMAT("${OUTPUT_FORMAT}", "${BIG_OUTPUT_FORMAT}",
165	      "${LITTLE_OUTPUT_FORMAT}")
166OUTPUT_ARCH(${OUTPUT_ARCH})
167ENTRY(${ENTRY})
168
169${RELOCATING+${LIB_SEARCH_DIRS}}
170${RELOCATING+${EXECUTABLE_SYMBOLS}}
171${RELOCATING+${MEMORY_DEF}}
172
173SECTIONS
174{
175  .hash        ${RELOCATING-0} : { *(.hash)		}
176  .dynsym      ${RELOCATING-0} : { *(.dynsym)		}
177  .dynstr      ${RELOCATING-0} : { *(.dynstr)		}
178  .gnu.version		${RELOCATING-0} : { *(.gnu.version) }
179  .gnu.version_d	${RELOCATING-0} : { *(.gnu.version_d) }
180  .gnu.version_r	${RELOCATING-0} : { *(.gnu.version_r) }
181
182  .rel.text    ${RELOCATING-0} :
183    {
184      *(.rel.text)
185      ${RELOCATING+*(.rel.text.*)}
186      ${RELOCATING+*(.rel.gnu.linkonce.t.*)}
187    }
188  .rela.text   ${RELOCATING-0} :
189    {
190      *(.rela.text)
191      ${RELOCATING+*(.rela.text.*)}
192      ${RELOCATING+*(.rela.gnu.linkonce.t.*)}
193    }
194  .rel.data    ${RELOCATING-0} :
195    {
196      *(.rel.data)
197      ${RELOCATING+*(.rel.data.*)}
198      ${RELOCATING+*(.rel.gnu.linkonce.d.*)}
199    }
200  .rela.data   ${RELOCATING-0} :
201    {
202      *(.rela.data)
203      ${RELOCATING+*(.rela.data.*)}
204      ${RELOCATING+*(.rela.gnu.linkonce.d.*)}
205    }
206  .rel.rodata  ${RELOCATING-0} :
207    {
208      *(.rel.rodata)
209      ${RELOCATING+*(.rel.rodata.*)}
210      ${RELOCATING+*(.rel.gnu.linkonce.r.*)}
211    }
212  .rela.rodata ${RELOCATING-0} :
213    {
214      *(.rela.rodata)
215      ${RELOCATING+*(.rela.rodata.*)}
216      ${RELOCATING+*(.rela.gnu.linkonce.r.*)}
217    }
218  .rel.sdata   ${RELOCATING-0} :
219    {
220      *(.rel.sdata)
221      ${RELOCATING+*(.rel.sdata.*)}
222      ${RELOCATING+*(.rel.gnu.linkonce.s.*)}
223    }
224  .rela.sdata   ${RELOCATING-0} :
225    {
226      *(.rela.sdata)
227      ${RELOCATING+*(.rela.sdata.*)}
228      ${RELOCATING+*(.rela.gnu.linkonce.s.*)}
229    }
230  .rel.sbss    ${RELOCATING-0} :
231    { 
232      *(.rel.sbss)
233      ${RELOCATING+*(.rel.sbss.*)}
234      ${RELOCATING+*(.rel.gnu.linkonce.sb.*)}
235    }
236  .rela.sbss   ${RELOCATING-0} :
237    {
238      *(.rela.sbss)
239      ${RELOCATING+*(.rela.sbss.*)}
240      ${RELOCATING+*(.rel.gnu.linkonce.sb.*)}
241    }
242  .rel.bss     ${RELOCATING-0} : 
243    { 
244      *(.rel.bss)
245      ${RELOCATING+*(.rel.bss.*)}
246      ${RELOCATING+*(.rel.gnu.linkonce.b.*)}
247    }
248  .rela.bss    ${RELOCATING-0} : 
249    { 
250      *(.rela.bss)
251      ${RELOCATING+*(.rela.bss.*)}
252      ${RELOCATING+*(.rela.gnu.linkonce.b.*)}
253    }
254  .rel.stext		${RELOCATING-0} : { *(.rel.stest) }
255  .rela.stext		${RELOCATING-0} : { *(.rela.stest) }
256  .rel.etext		${RELOCATING-0} : { *(.rel.etest) }
257  .rela.etext		${RELOCATING-0} : { *(.rela.etest) }
258  .rel.sdata		${RELOCATING-0} : { *(.rel.sdata) }
259  .rela.sdata		${RELOCATING-0} : { *(.rela.sdata) }
260  .rel.edata		${RELOCATING-0} : { *(.rel.edata) }
261  .rela.edata		${RELOCATING-0} : { *(.rela.edata) }
262  .rel.eit_v		${RELOCATING-0} : { *(.rel.eit_v) }
263  .rela.eit_v		${RELOCATING-0} : { *(.rela.eit_v) }
264  .rel.ebss		${RELOCATING-0} : { *(.rel.ebss) }
265  .rela.ebss		${RELOCATING-0} : { *(.rela.ebss) }
266  .rel.srodata		${RELOCATING-0} : { *(.rel.srodata) }
267  .rela.srodata		${RELOCATING-0} : { *(.rela.srodata) }
268  .rel.erodata		${RELOCATING-0} : { *(.rel.erodata) }
269  .rela.erodata		${RELOCATING-0} : { *(.rela.erodata) }
270  .rel.got		${RELOCATING-0} : { *(.rel.got) }
271  .rela.got		${RELOCATING-0} : { *(.rela.got) }
272  .rel.ctors		${RELOCATING-0} : { *(.rel.ctors) }
273  .rela.ctors		${RELOCATING-0} : { *(.rela.ctors) }
274  .rel.dtors		${RELOCATING-0} : { *(.rel.dtors) }
275  .rela.dtors		${RELOCATING-0} : { *(.rela.dtors) }
276  .rel.init		${RELOCATING-0} : { *(.rel.init) }
277  .rela.init		${RELOCATING-0} : { *(.rela.init) }
278  .rel.fini		${RELOCATING-0} : { *(.rel.fini) }
279  .rela.fini		${RELOCATING-0} : { *(.rela.fini) }
280  .rel.plt		${RELOCATING-0} : { *(.rel.plt) }
281  .rela.plt		${RELOCATING-0} : { *(.rela.plt) }
282
283  /* Concatenate .page0 sections.  Put them in the page0 memory bank
284     unless we are creating a relocatable file.  */
285  .page0 :
286  {
287    *(.page0)
288  } ${RELOCATING+ > page0}
289
290  /* Start of text section.  */
291  .stext ${RELOCATING-0} : 
292  {
293    *(.stext)
294  } ${RELOCATING+ > ${TEXT_MEMORY}}
295
296  .init	${RELOCATING-0} :
297  {
298    *(.init) 
299  } ${RELOCATING+=${NOP-0}}
300
301  ${RELOCATING-${INSTALL_RELOC}}
302  ${RELOCATING-${FINISH_RELOC}}
303
304  .text ${RELOCATING-0}:
305  {
306    /* Put startup code at beginning so that _start keeps same address.  */
307    ${RELOCATING+${STARTUP_CODE}}
308
309    ${RELOCATING+*(.init)}
310    *(.text)
311    ${RELOCATING+*(.text.*)}
312    /* .gnu.warning sections are handled specially by elf32.em.  */
313    *(.gnu.warning)
314    ${RELOCATING+*(.gnu.linkonce.t.*)}
315    ${RELOCATING+*(.tramp)}
316    ${RELOCATING+*(.tramp.*)}
317
318    ${RELOCATING+${FINISH_CODE}}
319
320    ${RELOCATING+_etext = .;}
321    ${RELOCATING+PROVIDE (etext = .);}
322    ${RELOCATING+. = ALIGN(2);}
323  } ${RELOCATING+ > ${TEXT_MEMORY} =0xa7a7a7a7}
324
325  .eh_frame ${RELOCATING-0} :
326  {
327    KEEP (*(.eh_frame))
328  } ${RELOCATING+ > ${TEXT_MEMORY}}
329
330  .gcc_except_table ${RELOCATING-0} :
331  {
332    *(.gcc_except_table)
333  } ${RELOCATING+ > ${TEXT_MEMORY}}
334
335  .rodata  ${RELOCATING-0} :
336  {
337    *(.rodata)
338    ${RELOCATING+*(.rodata.*)}
339    ${RELOCATING+*(.gnu.linkonce.r*)}
340    ${RELOCATING+. = ALIGN(2);}
341  } ${RELOCATING+ > ${TEXT_MEMORY} =0xffffffff}
342
343  .rodata1 ${RELOCATING-0} :
344  {
345    *(.rodata1)
346    ${RELOCATING+. = ALIGN(2);}
347  } ${RELOCATING+ > ${TEXT_MEMORY} =0xffffffff}
348
349  /* Constructor and destructor tables are in ROM.  */
350  ${RELOCATING+${CTOR}}
351  ${RELOCATING+${DTOR}}
352
353  .jcr ${RELOCATING-0} :
354  {
355    KEEP (*(.jcr))
356  } ${RELOCATING+ > ${TEXT_MEMORY}}
357
358  /* Start of the data section image in ROM.  */
359  ${RELOCATING+__data_image = .;}
360  ${RELOCATING+PROVIDE (__data_image = .);}
361
362  /* All read-only sections that normally go in PROM must be above.
363     We construct the DATA image section in PROM at end of all these
364     read-only sections.  The data image must be copied at init time.
365     Refer to GNU ld, Section 3.6.8.2 Output Section LMA.  */
366  .data  ${RELOCATING-0} : ${RELOCATING+AT (__data_image)}
367  {
368    ${RELOCATING+__data_section_start = .;}
369    ${RELOCATING+PROVIDE (__data_section_start = .);}
370
371    ${RELOCATING+${DATA_START_SYMBOLS}}
372    ${RELOCATING+*(.sdata)}
373    *(.data)
374    ${RELOCATING+*(.data.*)}
375    ${RELOCATING+*(.data1)}
376    ${RELOCATING+*(.gnu.linkonce.d.*)}
377    ${CONSTRUCTING+CONSTRUCTORS}
378
379    ${RELOCATING+_edata  =  .;}
380    ${RELOCATING+PROVIDE (edata = .);}
381    ${RELOCATING+. = ALIGN(2);}
382  } ${RELOCATING+ > ${DATA_MEMORY} =0xffffffff}
383
384  ${RELOCATING+__data_section_size = SIZEOF(.data);}
385  ${RELOCATING+PROVIDE (__data_section_size = SIZEOF(.data));}
386  ${RELOCATING+__data_image_end = __data_image + __data_section_size;}
387
388  ${RELOCATING+${PRE_COMPUTE_DATA_SIZE}}
389
390  /* .install ${RELOCATING-0}:
391  {
392    . = _data_image_end;
393  } ${RELOCATING+ > ${TEXT_MEMORY}} */
394
395  /* Relocation for some bss and data sections.  */
396  ${RELOCATING-${BSS_DATA_RELOC}}
397  ${RELOCATING-${SOFT_REGS_RELOC}}
398
399  .bss ${RELOCATING-0} :
400  {
401    ${RELOCATING+__bss_start = .;}
402    ${RELOCATING+*(.softregs)}
403    ${RELOCATING+*(.sbss)}
404    ${RELOCATING+*(.scommon)}
405
406    *(.dynbss)
407    *(.bss)
408    ${RELOCATING+*(.bss.*)}
409    ${RELOCATING+*(.gnu.linkonce.b.*)}
410    *(COMMON)
411    ${RELOCATING+PROVIDE (_end = .);}
412  } ${RELOCATING+ > ${DATA_MEMORY}}
413  ${RELOCATING+__bss_size = SIZEOF(.bss);}
414  ${RELOCATING+PROVIDE (__bss_size = SIZEOF(.bss));}
415
416  .eeprom ${RELOCATING-0} :
417  {
418    *(.eeprom)
419    *(.eeprom.*)
420  } ${RELOCATING+ > ${EEPROM_MEMORY}}
421
422  ${RELOCATING+${VECTORS}}
423
424  /* Stabs debugging sections.  */
425  .stab		 0 : { *(.stab) }
426  .stabstr	 0 : { *(.stabstr) }
427  .stab.excl	 0 : { *(.stab.excl) }
428  .stab.exclstr	 0 : { *(.stab.exclstr) }
429  .stab.index	 0 : { *(.stab.index) }
430  .stab.indexstr 0 : { *(.stab.indexstr) }
431
432  .comment	 0 : { *(.comment) }
433
434  /* DWARF debug sections.
435     Symbols in the DWARF debugging sections are relative to the beginning
436     of the section so we begin them at 0.
437     Treatment of DWARF debug section must be at end of the linker
438     script to avoid problems when there are undefined symbols. It's necessary
439     to avoid that the DWARF section is relocated before such undefined
440     symbols are found.  */
441
442  /* DWARF 1 */
443  .debug	 0 : { *(.debug) }
444  .line		 0 : { *(.line) }
445
446  /* GNU DWARF 1 extensions */
447  .debug_srcinfo 0 : { *(.debug_srcinfo) }
448  .debug_sfnames 0 : { *(.debug_sfnames) }
449
450  /* DWARF 1.1 and DWARF 2 */
451  .debug_aranges  0 : { *(.debug_aranges) }
452  .debug_pubnames 0 : { *(.debug_pubnames) }
453
454  /* DWARF 2 */
455  .debug_info     0 : { *(.debug_info) *(.gnu.linkonce.wi.*) }
456  .debug_abbrev   0 : { *(.debug_abbrev) }
457  .debug_line     0 : { *(.debug_line) }
458  .debug_frame    0 : { *(.debug_frame) }
459  .debug_str      0 : { *(.debug_str) }
460  .debug_loc      0 : { *(.debug_loc) }
461  .debug_macinfo  0 : { *(.debug_macinfo) }
462}
463EOF
464