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219d1afa | 1 | # Copyright (C) 2014-2018 Free Software Foundation, Inc. |
6c19b93b | 2 | # |
985743c7 NC |
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. | |
93fbbb04 GK |
6 | # |
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) | |
93fbbb04 GK |
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 | |
19 | # .text section. | |
20 | # DATA_START_SYMBOLS - symbols that appear at the start of the | |
21 | # .data section. | |
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 | |
6c19b93b | 28 | # combination of .init sections. |
93fbbb04 | 29 | # FINI_START, FINI_END - statements just before and just after |
6c19b93b | 30 | # combination of .fini sections. |
93fbbb04 GK |
31 | # |
32 | # When adding sections, do note that the names of some sections are used | |
33 | # when specifying the start address of the next. | |
34 | # | |
35 | ||
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: | |
43 | # | |
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 | |
53 | # | |
54 | # Each of these can also have corresponding .rel.* and .rela.* sections. | |
55 | ||
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" | |
6c19b93b | 62 | CTOR=".ctors ${CONSTRUCTING-0} : |
93fbbb04 GK |
63 | { |
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 | |
73 | is in. */ | |
74 | ||
40cf2291 AM |
75 | KEEP (*crtbegin.o(.ctors)) |
76 | KEEP (*crtbegin?.o(.ctors)) | |
93fbbb04 GK |
77 | |
78 | /* We don't want to include the .ctor section from | |
bd6791bc | 79 | the crtend.o file until after the sorted ctors. |
93fbbb04 GK |
80 | The .ctor section from the crtend file contains the |
81 | end of ctors marker and it must be last */ | |
82 | ||
40cf2291 | 83 | KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o $OTHER_EXCLUDE_FILES) .ctors)) |
93fbbb04 GK |
84 | KEEP (*(SORT(.ctors.*))) |
85 | KEEP (*(.ctors)) | |
86 | ${CONSTRUCTING+${CTOR_END}} | |
87 | } > ROM" | |
88 | ||
ec2d9b29 | 89 | DTOR=" .dtors ${CONSTRUCTING-0} : |
93fbbb04 GK |
90 | { |
91 | ${CONSTRUCTING+${DTOR_START}} | |
40cf2291 AM |
92 | KEEP (*crtbegin.o(.dtors)) |
93 | KEEP (*crtbegin?.o(.dtors)) | |
94 | KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o $OTHER_EXCLUDE_FILES) .dtors)) | |
93fbbb04 GK |
95 | KEEP (*(SORT(.dtors.*))) |
96 | KEEP (*(.dtors)) | |
97 | ${CONSTRUCTING+${DTOR_END}} | |
98 | } > ROM" | |
99 | ||
100 | cat <<EOF | |
219d1afa | 101 | /* Copyright (C) 2014-2018 Free Software Foundation, Inc. |
985743c7 NC |
102 | |
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. */ | |
106 | ||
93fbbb04 GK |
107 | OUTPUT_FORMAT("${OUTPUT_FORMAT}", "${BIG_OUTPUT_FORMAT}", |
108 | "${LITTLE_OUTPUT_FORMAT}") | |
109 | OUTPUT_ARCH(${OUTPUT_ARCH}) | |
b34c1498 | 110 | ${RELOCATING+ENTRY(${ENTRY})} |
93fbbb04 GK |
111 | |
112 | ${RELOCATING+${LIB_SEARCH_DIRS}} | |
113 | ${RELOCATING+${EXECUTABLE_SYMBOLS}} | |
114 | ${RELOCATING+${INPUT_FILES}} | |
ec2d9b29 AM |
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. */} | |
93fbbb04 GK |
119 | |
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. */ | |
6c19b93b | 122 | MEMORY |
93fbbb04 GK |
123 | { |
124 | RAM (w) : ORIGIN = 0, LENGTH = 0x7F00 | |
125 | ROM (!w) : ORIGIN = 0x8000, LENGTH = 0xFF8000 | |
126 | } | |
127 | ||
128 | SECTIONS | |
129 | { | |
ec2d9b29 | 130 | .data ${RELOCATING-0} : |
93fbbb04 | 131 | { |
517ed485 NC |
132 | ${RELOCATING+__rdata = .;} |
133 | ${RELOCATING+__data = .;} | |
93fbbb04 GK |
134 | ${RELOCATING+${DATA_START_SYMBOLS}} |
135 | *(.data) | |
136 | ${RELOCATING+*(.data.*)} | |
137 | ${RELOCATING+*(.gnu.linkonce.d.*)} | |
138 | ${CONSTRUCTING+SORT(CONSTRUCTORS)} | |
139 | } > RAM | |
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}} | |
ec2d9b29 | 147 | .bss ${RELOCATING-0} : |
93fbbb04 GK |
148 | { |
149 | *(.dynbss) | |
150 | *(.bss) | |
151 | ${RELOCATING+*(.bss.*)} | |
152 | ${RELOCATING+*(.gnu.linkonce.b.*)} | |
153 | *(COMMON) | |
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});} | |
158 | } > RAM | |
827a1c67 | 159 | ${RELOCATING+${OTHER_BSS_END_SYMBOLS}} |
93fbbb04 | 160 | ${RELOCATING+. = ALIGN(${ALIGNMENT});} |
827a1c67 | 161 | ${RELOCATING+${OTHER_END_SYMBOLS}} |
93fbbb04 | 162 | ${RELOCATING+_end = .;} |
da1f2fec | 163 | ${RELOCATING+__stack = .;} |
93fbbb04 GK |
164 | ${RELOCATING+PROVIDE (end = .);} |
165 | ||
166 | /* Read-only sections in ROM. */ | |
ec2d9b29 | 167 | .int_vec ${RELOCATING-0} : { *(.int_vec) } ${RELOCATING+> ROM} |
93fbbb04 | 168 | |
ec2d9b29 | 169 | .rodata ${RELOCATING-0} : { *(.rodata) ${RELOCATING+*(.rodata.*)} ${RELOCATING+*(.gnu.linkonce.r.*)} } ${RELOCATING+> ROM} |
93fbbb04 GK |
170 | ${RELOCATING+${CTOR}} |
171 | ${RELOCATING+${DTOR}} | |
1ee7cf4c NC |
172 | .jcr : { KEEP (*(.jcr)) } ${RELOCATING+> ROM} |
173 | .eh_frame : { KEEP (*(.eh_frame)) } ${RELOCATING+> ROM} | |
ec51c381 | 174 | .gcc_except_table : { *(.gcc_except_table) *(.gcc_except_table.*) } ${RELOCATING+> ROM} |
1ee7cf4c | 175 | .plt : { *(.plt) } ${RELOCATING+> ROM} |
93fbbb04 | 176 | |
ec2d9b29 | 177 | .text ${RELOCATING-0} : |
93fbbb04 GK |
178 | { |
179 | ${RELOCATING+${TEXT_START_SYMBOLS}} | |
180 | *(.text) | |
181 | ${RELOCATING+*(.text.*)} | |
182 | *(.stub) | |
183 | /* .gnu.warning sections are handled specially by elf32.em. */ | |
184 | *(.gnu.warning) | |
185 | ${RELOCATING+*(.gnu.linkonce.t.*)} | |
186 | ${RELOCATING+${OTHER_TEXT_SECTIONS}} | |
1ee7cf4c | 187 | } ${RELOCATING+> ROM =${NOP-0}} |
6c19b93b AM |
188 | .init ${RELOCATING-0} : |
189 | { | |
93fbbb04 GK |
190 | ${RELOCATING+${INIT_START}} |
191 | KEEP (*(.init)) | |
192 | ${RELOCATING+${INIT_END}} | |
1ee7cf4c | 193 | } ${RELOCATING+> ROM =${NOP-0}} |
ec2d9b29 | 194 | .fini ${RELOCATING-0} : |
93fbbb04 GK |
195 | { |
196 | ${RELOCATING+${FINI_START}} | |
197 | KEEP (*(.fini)) | |
198 | ${RELOCATING+${FINI_END}} | |
1ee7cf4c | 199 | } ${RELOCATING+> ROM =${NOP-0}} |
93fbbb04 GK |
200 | ${RELOCATING+PROVIDE (__etext = .);} |
201 | ${RELOCATING+PROVIDE (_etext = .);} | |
202 | ${RELOCATING+PROVIDE (etext = .);} | |
203 | ${RELOCATING+${OTHER_READONLY_SECTIONS}} | |
204 | ||
205 | ||
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) } | |
213 | ||
214 | .comment 0 : { *(.comment) } | |
215 | ||
ceb0a680 NC |
216 | EOF |
217 | ||
d061dfac | 218 | . $srcdir/scripttempl/DWARF.sc |
2a995fc1 | 219 | |
ceb0a680 | 220 | cat <<EOF |
93fbbb04 GK |
221 | ${RELOCATING+${OTHER_RELOCATING_SECTIONS}} |
222 | ||
223 | /* These must appear regardless of ${RELOCATING}. */ | |
224 | ${OTHER_SECTIONS} | |
225 | } | |
226 | EOF |