1#
2# Unusual variables checked by this code:
3#	NOP - two byte opcode for no-op (defaults to 0)
4#	INITIAL_READONLY_SECTIONS - at start of text segment
5#	OTHER_READONLY_SECTIONS - other than .text .init .rodata ...
6#		(e.g., .PARISC.milli)
7#	OTHER_TEXT_SECTIONS - these get put in .text when relocating
8#	OTHER_READWRITE_SECTIONS - other than .data .bss .ctors .sdata ...
9#		(e.g., .PARISC.global)
10#	OTHER_SECTIONS - at the end
11#	EXECUTABLE_SYMBOLS - symbols that must be defined for an
12#		executable (e.g., _DYNAMIC_LINK)
13#	TEXT_START_SYMBOLS - symbols that appear at the start of the
14#		.text section.
15#	DATA_START_SYMBOLS - symbols that appear at the start of the
16#		.data section.
17#	OTHER_GOT_SYMBOLS - symbols defined just before .got.
18#	OTHER_GOT_SECTIONS - sections just after .got and .sdata.
19#	OTHER_BSS_SYMBOLS - symbols that appear at the start of the
20#		.bss section besides __bss_start.
21#	INPUT_FILES - INPUT command of files to always include
22#	INIT_START, INIT_END -  statements just before and just after
23# 	combination of .init sections.
24#	FINI_START, FINI_END - statements just before and just after
25# 	combination of .fini sections.
26#
27# When adding sections, do note that the names of some sections are used
28# when specifying the start address of the next.
29#
30
31#  Many sections come in three flavours.  There is the 'real' section,
32#  like ".data".  Then there are the per-procedure or per-variable
33#  sections, generated by -ffunction-sections and -fdata-sections in GCC,
34#  and useful for --gc-sections, which for a variable "foo" might be
35#  ".data.foo".  Then there are the linkonce sections, for which the linker
36#  eliminates duplicates, which are named like ".gnu.linkonce.d.foo".
37#  The exact correspondences are:
38#
39#  Section	Linkonce section
40#  .text	.gnu.linkonce.t.foo
41#  .rodata	.gnu.linkonce.r.foo
42#  .data	.gnu.linkonce.d.foo
43#  .bss		.gnu.linkonce.b.foo
44#  .sdata	.gnu.linkonce.s.foo
45#  .sbss	.gnu.linkonce.sb.foo
46#  .sdata2	.gnu.linkonce.s2.foo
47#  .sbss2	.gnu.linkonce.sb2.foo
48#
49#  Each of these can also have corresponding .rel.* and .rela.* sections.
50
51test -z "$ENTRY" && ENTRY=_start
52test -z "${BIG_OUTPUT_FORMAT}" && BIG_OUTPUT_FORMAT=${OUTPUT_FORMAT}
53test -z "${LITTLE_OUTPUT_FORMAT}" && LITTLE_OUTPUT_FORMAT=${OUTPUT_FORMAT}
54if [ -z "$MACHINE" ]; then OUTPUT_ARCH=${ARCH}; else OUTPUT_ARCH=${ARCH}:${MACHINE}; fi
55test -z "${ELFSIZE}" && ELFSIZE=32
56test -z "${ALIGNMENT}" && ALIGNMENT="${ELFSIZE} / 8"
57CTOR=".ctors ${CONSTRUCTING-0} :
58  {
59    ${CONSTRUCTING+${CTOR_START}}
60    /* gcc uses crtbegin.o to find the start of
61       the constructors, so we make sure it is
62       first.  Because this is a wildcard, it
63       doesn't matter if the user does not
64       actually link against crtbegin.o; the
65       linker won't look for a file to match a
66       wildcard.  The wildcard also means that it
67       doesn't matter which directory crtbegin.o
68       is in.  */
69
70    KEEP (*crtbegin*.o(.ctors))
71
72    /* We don't want to include the .ctor section from
73       the crtend.o file until after the sorted ctors.
74       The .ctor section from the crtend file contains the
75       end of ctors marker and it must be last */
76
77    KEEP (*(EXCLUDE_FILE (*crtend*.o $OTHER_EXCLUDE_FILES) .ctors))
78    KEEP (*(SORT(.ctors.*)))
79    KEEP (*(.ctors))
80    ${CONSTRUCTING+${CTOR_END}}
81  } > ROM"
82
83DTOR=" .dtors       ${CONSTRUCTING-0} :
84  {
85    ${CONSTRUCTING+${DTOR_START}}
86    KEEP (*crtbegin*.o(.dtors))
87    KEEP (*(EXCLUDE_FILE (*crtend*.o $OTHER_EXCLUDE_FILES) .dtors))
88    KEEP (*(SORT(.dtors.*)))
89    KEEP (*(.dtors))
90    ${CONSTRUCTING+${DTOR_END}}
91  } > ROM"
92
93cat <<EOF
94OUTPUT_FORMAT("${OUTPUT_FORMAT}", "${BIG_OUTPUT_FORMAT}",
95	      "${LITTLE_OUTPUT_FORMAT}")
96OUTPUT_ARCH(${OUTPUT_ARCH})
97ENTRY(${ENTRY})
98
99${RELOCATING+${LIB_SEARCH_DIRS}}
100${RELOCATING+${EXECUTABLE_SYMBOLS}}
101${RELOCATING+${INPUT_FILES}}
102${RELOCATING- /* For some reason, the Solaris linker makes bad executables
103  if gld -r is used and the intermediate file has sections starting
104  at non-zero addresses.  Could be a Solaris ld bug, could be a GNU ld
105  bug.  But for now assigning the zero vmas works.  */}
106
107/* There are two memory regions we care about, one from 0 through 0x7F00
108   that is RAM and one from 0x8000 up which is ROM.  */
109MEMORY
110{
111  RAM (w) : ORIGIN = 0, LENGTH = 0x7F00
112  ROM (!w) : ORIGIN = 0x8000, LENGTH = 0xFF8000
113}
114
115SECTIONS
116{
117  .data  ${RELOCATING-0} :
118  {
119    ${RELOCATING+__rdata = .;}
120    ${RELOCATING+__data = .;}
121    ${RELOCATING+${DATA_START_SYMBOLS}}
122    *(.data)
123    ${RELOCATING+*(.data.*)}
124    ${RELOCATING+*(.gnu.linkonce.d.*)}
125    ${CONSTRUCTING+SORT(CONSTRUCTORS)}
126  } > RAM
127  ${RELOCATING+${OTHER_READWRITE_SECTIONS}}
128  ${RELOCATING+${OTHER_GOT_SYMBOLS}}
129  ${RELOCATING+${OTHER_GOT_SECTIONS}}
130  ${RELOCATING+_edata = .;}
131  ${RELOCATING+PROVIDE (edata = .);}
132  ${RELOCATING+__bss_start = .;}
133  ${RELOCATING+${OTHER_BSS_SYMBOLS}}
134  .bss     ${RELOCATING-0} :
135  {
136   *(.dynbss)
137   *(.bss)
138   ${RELOCATING+*(.bss.*)}
139   ${RELOCATING+*(.gnu.linkonce.b.*)}
140   *(COMMON)
141   /* Align here to ensure that the .bss section occupies space up to
142      _end.  Align after .bss to ensure correct alignment even if the
143      .bss section disappears because there are no input sections.  */
144   ${RELOCATING+. = ALIGN(${ALIGNMENT});}
145  } > RAM
146  ${RELOCATING+${OTHER_BSS_END_SYMBOLS}}
147  ${RELOCATING+. = ALIGN(${ALIGNMENT});}
148  ${RELOCATING+${OTHER_END_SYMBOLS}}
149  ${RELOCATING+_end = .;}
150  ${RELOCATING+__stack = .;}
151  ${RELOCATING+PROVIDE (end = .);}
152
153  /* Read-only sections in ROM.  */
154  .int_vec     ${RELOCATING-0} : { *(.int_vec)	} ${RELOCATING+> ROM}
155
156  .rodata ${RELOCATING-0} : { *(.rodata) ${RELOCATING+*(.rodata.*)} ${RELOCATING+*(.gnu.linkonce.r.*)} } ${RELOCATING+> ROM}
157  ${RELOCATING+${CTOR}}
158  ${RELOCATING+${DTOR}}
159  .jcr : { KEEP (*(.jcr)) } ${RELOCATING+> ROM}
160  .eh_frame : { KEEP (*(.eh_frame)) } ${RELOCATING+> ROM}
161  .gcc_except_table : { *(.gcc_except_table) } ${RELOCATING+> ROM}
162  .plt : { *(.plt) } ${RELOCATING+> ROM}
163
164  .text    ${RELOCATING-0} :
165  {
166    ${RELOCATING+${TEXT_START_SYMBOLS}}
167    *(.text)
168    ${RELOCATING+*(.text.*)}
169    *(.stub)
170    /* .gnu.warning sections are handled specially by elf32.em.  */
171    *(.gnu.warning)
172    ${RELOCATING+*(.gnu.linkonce.t.*)}
173    ${RELOCATING+${OTHER_TEXT_SECTIONS}}
174  } ${RELOCATING+> ROM =${NOP-0}}
175  .init        ${RELOCATING-0} :
176  {
177    ${RELOCATING+${INIT_START}}
178    KEEP (*(.init))
179    ${RELOCATING+${INIT_END}}
180  } ${RELOCATING+> ROM =${NOP-0}}
181  .fini    ${RELOCATING-0} :
182  {
183    ${RELOCATING+${FINI_START}}
184    KEEP (*(.fini))
185    ${RELOCATING+${FINI_END}}
186  } ${RELOCATING+> ROM =${NOP-0}}
187  ${RELOCATING+PROVIDE (__etext = .);}
188  ${RELOCATING+PROVIDE (_etext = .);}
189  ${RELOCATING+PROVIDE (etext = .);}
190  ${RELOCATING+${OTHER_READONLY_SECTIONS}}
191
192
193  /* Stabs debugging sections.  */
194  .stab 0 : { *(.stab) }
195  .stabstr 0 : { *(.stabstr) }
196  .stab.excl 0 : { *(.stab.excl) }
197  .stab.exclstr 0 : { *(.stab.exclstr) }
198  .stab.index 0 : { *(.stab.index) }
199  .stab.indexstr 0 : { *(.stab.indexstr) }
200
201  .comment 0 : { *(.comment) }
202
203  /* DWARF debug sections.
204     Symbols in the DWARF debugging sections are relative to the beginning
205     of the section so we begin them at 0.  */
206
207  /* DWARF 1 */
208  .debug          0 : { *(.debug) }
209  .line           0 : { *(.line) }
210
211  /* GNU DWARF 1 extensions */
212  .debug_srcinfo  0 : { *(.debug_srcinfo) }
213  .debug_sfnames  0 : { *(.debug_sfnames) }
214
215  /* DWARF 1.1 and DWARF 2 */
216  .debug_aranges  0 : { *(.debug_aranges) }
217  .debug_pubnames 0 : { *(.debug_pubnames) }
218
219  /* DWARF 2 */
220  .debug_info     0 : { *(.debug_info) *(.gnu.linkonce.wi.*) }
221  .debug_abbrev   0 : { *(.debug_abbrev) }
222  .debug_line     0 : { *(.debug_line) }
223  .debug_frame    0 : { *(.debug_frame) }
224  .debug_str      0 : { *(.debug_str) }
225  .debug_loc      0 : { *(.debug_loc) }
226  .debug_macinfo  0 : { *(.debug_macinfo) }
227
228  /* SGI/MIPS DWARF 2 extensions */
229  .debug_weaknames 0 : { *(.debug_weaknames) }
230  .debug_funcnames 0 : { *(.debug_funcnames) }
231  .debug_typenames 0 : { *(.debug_typenames) }
232  .debug_varnames  0 : { *(.debug_varnames) }
233
234  ${RELOCATING+${OTHER_RELOCATING_SECTIONS}}
235
236  /* These must appear regardless of ${RELOCATING}.  */
237  ${OTHER_SECTIONS}
238}
239EOF
240