1 # Copyright (C) 2014-2017 Free Software Foundation, Inc.
3 # Copying and distribution of this file, with or without modification,
4 # are permitted in any medium without royalty provided the copyright
5 # notice and this notice are preserved.
7 # Unusual variables checked by this code:
8 # NOP - two byte opcode for no-op (defaults to 0)
9 # INITIAL_READONLY_SECTIONS - at start of text segment
10 # OTHER_READONLY_SECTIONS - other than .text .init .rodata ...
11 # (e.g., .PARISC.milli)
12 # OTHER_TEXT_SECTIONS - these get put in .text when relocating
13 # OTHER_READWRITE_SECTIONS - other than .data .bss .ctors .sdata ...
14 # (e.g., .PARISC.global)
15 # OTHER_SECTIONS - at the end
16 # EXECUTABLE_SYMBOLS - symbols that must be defined for an
17 # executable (e.g., _DYNAMIC_LINK)
18 # TEXT_START_SYMBOLS - symbols that appear at the start of the
20 # DATA_START_SYMBOLS - symbols that appear at the start of the
22 # OTHER_GOT_SYMBOLS - symbols defined just before .got.
23 # OTHER_GOT_SECTIONS - sections just after .got and .sdata.
24 # OTHER_BSS_SYMBOLS - symbols that appear at the start of the
25 # .bss section besides __bss_start.
26 # INPUT_FILES - INPUT command of files to always include
27 # INIT_START, INIT_END - statements just before and just after
28 # combination of .init sections.
29 # FINI_START, FINI_END - statements just before and just after
30 # combination of .fini sections.
32 # When adding sections, do note that the names of some sections are used
33 # when specifying the start address of the next.
36 # Many sections come in three flavours. There is the 'real' section,
37 # like ".data". Then there are the per-procedure or per-variable
38 # sections, generated by -ffunction-sections and -fdata-sections in GCC,
39 # and useful for --gc-sections, which for a variable "foo" might be
40 # ".data.foo". Then there are the linkonce sections, for which the linker
41 # eliminates duplicates, which are named like ".gnu.linkonce.d.foo".
42 # The exact correspondences are:
44 # Section Linkonce section
45 # .text .gnu.linkonce.t.foo
46 # .rodata .gnu.linkonce.r.foo
47 # .data .gnu.linkonce.d.foo
48 # .bss .gnu.linkonce.b.foo
49 # .sdata .gnu.linkonce.s.foo
50 # .sbss .gnu.linkonce.sb.foo
51 # .sdata2 .gnu.linkonce.s2.foo
52 # .sbss2 .gnu.linkonce.sb2.foo
54 # Each of these can also have corresponding .rel.* and .rela.* sections.
56 test -z "$ENTRY" && ENTRY=_start
57 test -z "${BIG_OUTPUT_FORMAT}" && BIG_OUTPUT_FORMAT=${OUTPUT_FORMAT}
58 test -z "${LITTLE_OUTPUT_FORMAT}" && LITTLE_OUTPUT_FORMAT=${OUTPUT_FORMAT}
59 if [ -z "$MACHINE" ]; then OUTPUT_ARCH=${ARCH}; else OUTPUT_ARCH=${ARCH}:${MACHINE}; fi
60 test -z "${ELFSIZE}" && ELFSIZE=32
61 test -z "${ALIGNMENT}" && ALIGNMENT="${ELFSIZE} / 8"
62 CTOR=".ctors ${CONSTRUCTING-0} :
64 ${CONSTRUCTING+${CTOR_START}}
65 /* gcc uses crtbegin.o to find the start of
66 the constructors, so we make sure it is
67 first. Because this is a wildcard, it
68 doesn't matter if the user does not
69 actually link against crtbegin.o; the
70 linker won't look for a file to match a
71 wildcard. The wildcard also means that it
72 doesn't matter which directory crtbegin.o
75 KEEP (*crtbegin.o(.ctors))
76 KEEP (*crtbegin?.o(.ctors))
78 /* We don't want to include the .ctor section from
79 the crtend.o file until after the sorted ctors.
80 The .ctor section from the crtend file contains the
81 end of ctors marker and it must be last */
83 KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o $OTHER_EXCLUDE_FILES) .ctors))
84 KEEP (*(SORT(.ctors.*)))
86 ${CONSTRUCTING+${CTOR_END}}
89 DTOR=" .dtors ${CONSTRUCTING-0} :
91 ${CONSTRUCTING+${DTOR_START}}
92 KEEP (*crtbegin.o(.dtors))
93 KEEP (*crtbegin?.o(.dtors))
94 KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o $OTHER_EXCLUDE_FILES) .dtors))
95 KEEP (*(SORT(.dtors.*)))
97 ${CONSTRUCTING+${DTOR_END}}
101 /* Copyright (C) 2014-2017 Free Software Foundation, Inc.
103 Copying and distribution of this script, with or without modification,
104 are permitted in any medium without royalty provided the copyright
105 notice and this notice are preserved. */
107 OUTPUT_FORMAT("${OUTPUT_FORMAT}", "${BIG_OUTPUT_FORMAT}",
108 "${LITTLE_OUTPUT_FORMAT}")
109 OUTPUT_ARCH(${OUTPUT_ARCH})
110 ${RELOCATING+ENTRY(${ENTRY})}
112 ${RELOCATING+${LIB_SEARCH_DIRS}}
113 ${RELOCATING+${EXECUTABLE_SYMBOLS}}
114 ${RELOCATING+${INPUT_FILES}}
115 ${RELOCATING- /* For some reason, the Solaris linker makes bad executables
116 if gld -r is used and the intermediate file has sections starting
117 at non-zero addresses. Could be a Solaris ld bug, could be a GNU ld
118 bug. But for now assigning the zero vmas works. */}
120 /* There are two memory regions we care about, one from 0 through 0x7F00
121 that is RAM and one from 0x8000 up which is ROM. */
124 RAM (w) : ORIGIN = 0, LENGTH = 0x7F00
125 ROM (!w) : ORIGIN = 0x8000, LENGTH = 0xFF8000
130 .data ${RELOCATING-0} :
132 ${RELOCATING+__rdata = .;}
133 ${RELOCATING+__data = .;}
134 ${RELOCATING+${DATA_START_SYMBOLS}}
136 ${RELOCATING+*(.data.*)}
137 ${RELOCATING+*(.gnu.linkonce.d.*)}
138 ${CONSTRUCTING+SORT(CONSTRUCTORS)}
140 ${RELOCATING+${OTHER_READWRITE_SECTIONS}}
141 ${RELOCATING+${OTHER_GOT_SYMBOLS}}
142 ${RELOCATING+${OTHER_GOT_SECTIONS}}
143 ${RELOCATING+_edata = .;}
144 ${RELOCATING+PROVIDE (edata = .);}
145 ${RELOCATING+__bss_start = .;}
146 ${RELOCATING+${OTHER_BSS_SYMBOLS}}
147 .bss ${RELOCATING-0} :
151 ${RELOCATING+*(.bss.*)}
152 ${RELOCATING+*(.gnu.linkonce.b.*)}
154 /* Align here to ensure that the .bss section occupies space up to
155 _end. Align after .bss to ensure correct alignment even if the
156 .bss section disappears because there are no input sections. */
157 ${RELOCATING+. = ALIGN(${ALIGNMENT});}
159 ${RELOCATING+${OTHER_BSS_END_SYMBOLS}}
160 ${RELOCATING+. = ALIGN(${ALIGNMENT});}
161 ${RELOCATING+${OTHER_END_SYMBOLS}}
162 ${RELOCATING+_end = .;}
163 ${RELOCATING+__stack = .;}
164 ${RELOCATING+PROVIDE (end = .);}
166 /* Read-only sections in ROM. */
167 .int_vec ${RELOCATING-0} : { *(.int_vec) } ${RELOCATING+> ROM}
169 .rodata ${RELOCATING-0} : { *(.rodata) ${RELOCATING+*(.rodata.*)} ${RELOCATING+*(.gnu.linkonce.r.*)} } ${RELOCATING+> ROM}
170 ${RELOCATING+${CTOR}}
171 ${RELOCATING+${DTOR}}
172 .jcr : { KEEP (*(.jcr)) } ${RELOCATING+> ROM}
173 .eh_frame : { KEEP (*(.eh_frame)) } ${RELOCATING+> ROM}
174 .gcc_except_table : { *(.gcc_except_table) *(.gcc_except_table.*) } ${RELOCATING+> ROM}
175 .plt : { *(.plt) } ${RELOCATING+> ROM}
177 .text ${RELOCATING-0} :
179 ${RELOCATING+${TEXT_START_SYMBOLS}}
181 ${RELOCATING+*(.text.*)}
183 /* .gnu.warning sections are handled specially by elf32.em. */
185 ${RELOCATING+*(.gnu.linkonce.t.*)}
186 ${RELOCATING+${OTHER_TEXT_SECTIONS}}
187 } ${RELOCATING+> ROM =${NOP-0}}
188 .init ${RELOCATING-0} :
190 ${RELOCATING+${INIT_START}}
192 ${RELOCATING+${INIT_END}}
193 } ${RELOCATING+> ROM =${NOP-0}}
194 .fini ${RELOCATING-0} :
196 ${RELOCATING+${FINI_START}}
198 ${RELOCATING+${FINI_END}}
199 } ${RELOCATING+> ROM =${NOP-0}}
200 ${RELOCATING+PROVIDE (__etext = .);}
201 ${RELOCATING+PROVIDE (_etext = .);}
202 ${RELOCATING+PROVIDE (etext = .);}
203 ${RELOCATING+${OTHER_READONLY_SECTIONS}}
206 /* Stabs debugging sections. */
207 .stab 0 : { *(.stab) }
208 .stabstr 0 : { *(.stabstr) }
209 .stab.excl 0 : { *(.stab.excl) }
210 .stab.exclstr 0 : { *(.stab.exclstr) }
211 .stab.index 0 : { *(.stab.index) }
212 .stab.indexstr 0 : { *(.stab.indexstr) }
214 .comment 0 : { *(.comment) }
218 . $srcdir/scripttempl/DWARF.sc
221 ${RELOCATING+${OTHER_RELOCATING_SECTIONS}}
223 /* These must appear regardless of ${RELOCATING}. */