Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
8c2c3df3 CM |
2 | /* |
3 | * ld script to make ARM Linux kernel | |
4 | * taken from the i386 version by Russell King | |
5 | * Written by Martin Mares <mj@atrey.karlin.mff.cuni.cz> | |
6 | */ | |
7 | ||
19f6bc32 | 8 | #define RO_EXCEPTION_TABLE_ALIGN 8 |
2883352b | 9 | #define RUNTIME_DISCARD_EXIT |
19f6bc32 | 10 | |
8c2c3df3 | 11 | #include <asm-generic/vmlinux.lds.h> |
98fb7548 | 12 | #include <asm/cache.h> |
ce492a16 | 13 | #include <asm/hyp_image.h> |
87d1587b | 14 | #include <asm/kernel-pgtable.h> |
8c2c3df3 CM |
15 | #include <asm/memory.h> |
16 | #include <asm/page.h> | |
17 | ||
a2c1d73b MR |
18 | #include "image.h" |
19 | ||
8c2c3df3 | 20 | OUTPUT_ARCH(aarch64) |
af885f40 | 21 | ENTRY(_text) |
8c2c3df3 CM |
22 | |
23 | jiffies = jiffies_64; | |
24 | ||
e9ee186b | 25 | |
3471ee06 | 26 | #ifdef CONFIG_KVM |
e9ee186b JM |
27 | #define HYPERVISOR_EXTABLE \ |
28 | . = ALIGN(SZ_8); \ | |
29 | __start___kvm_ex_table = .; \ | |
30 | *(__kvm_ex_table) \ | |
31 | __stop___kvm_ex_table = .; | |
30c95391 | 32 | |
2d7bf218 | 33 | #define HYPERVISOR_DATA_SECTIONS \ |
16174eea DB |
34 | HYP_SECTION_NAME(.rodata) : { \ |
35 | __hyp_rodata_start = .; \ | |
2d7bf218 | 36 | *(HYP_SECTION_NAME(.data..ro_after_init)) \ |
16174eea DB |
37 | *(HYP_SECTION_NAME(.rodata)) \ |
38 | __hyp_rodata_end = .; \ | |
2d7bf218 DB |
39 | } |
40 | ||
30c95391 DB |
41 | #define HYPERVISOR_PERCPU_SECTION \ |
42 | . = ALIGN(PAGE_SIZE); \ | |
43 | HYP_SECTION_NAME(.data..percpu) : { \ | |
44 | *(HYP_SECTION_NAME(.data..percpu)) \ | |
45 | } | |
8c49b5d4 DB |
46 | |
47 | #define HYPERVISOR_RELOC_SECTION \ | |
48 | .hyp.reloc : ALIGN(4) { \ | |
49 | __hyp_reloc_begin = .; \ | |
50 | *(.hyp.reloc) \ | |
51 | __hyp_reloc_end = .; \ | |
52 | } | |
53 | ||
3471ee06 DB |
54 | #else /* CONFIG_KVM */ |
55 | #define HYPERVISOR_EXTABLE | |
2d7bf218 | 56 | #define HYPERVISOR_DATA_SECTIONS |
30c95391 | 57 | #define HYPERVISOR_PERCPU_SECTION |
8c49b5d4 | 58 | #define HYPERVISOR_RELOC_SECTION |
3471ee06 | 59 | #endif |
e9ee186b | 60 | |
2240bbb6 MZ |
61 | #define HYPERVISOR_TEXT \ |
62 | /* \ | |
06f75a1f AB |
63 | * Align to 4 KB so that \ |
64 | * a) the HYP vector table is at its minimum \ | |
65 | * alignment of 2048 bytes \ | |
66 | * b) the HYP init code will not cross a page \ | |
67 | * boundary if its size does not exceed \ | |
68 | * 4 KB (see related ASSERT() below) \ | |
2240bbb6 | 69 | */ \ |
06f75a1f | 70 | . = ALIGN(SZ_4K); \ |
5c636aa0 | 71 | __hyp_idmap_text_start = .; \ |
2240bbb6 | 72 | *(.hyp.idmap.text) \ |
5c636aa0 MY |
73 | __hyp_idmap_text_end = .; \ |
74 | __hyp_text_start = .; \ | |
2240bbb6 | 75 | *(.hyp.text) \ |
e9ee186b | 76 | HYPERVISOR_EXTABLE \ |
5c636aa0 | 77 | __hyp_text_end = .; |
2240bbb6 | 78 | |
5dfe9d7d AB |
79 | #define IDMAP_TEXT \ |
80 | . = ALIGN(SZ_4K); \ | |
5c636aa0 | 81 | __idmap_text_start = .; \ |
5dfe9d7d | 82 | *(.idmap.text) \ |
5c636aa0 | 83 | __idmap_text_end = .; |
5dfe9d7d | 84 | |
82869ac5 JM |
85 | #ifdef CONFIG_HIBERNATION |
86 | #define HIBERNATE_TEXT \ | |
87 | . = ALIGN(SZ_4K); \ | |
5c636aa0 | 88 | __hibernate_exit_text_start = .; \ |
82869ac5 | 89 | *(.hibernate_exit.text) \ |
5c636aa0 | 90 | __hibernate_exit_text_end = .; |
82869ac5 JM |
91 | #else |
92 | #define HIBERNATE_TEXT | |
93 | #endif | |
94 | ||
c7b9adaf WD |
95 | #ifdef CONFIG_UNMAP_KERNEL_AT_EL0 |
96 | #define TRAMP_TEXT \ | |
97 | . = ALIGN(PAGE_SIZE); \ | |
5c636aa0 | 98 | __entry_tramp_text_start = .; \ |
c7b9adaf WD |
99 | *(.entry.tramp.text) \ |
100 | . = ALIGN(PAGE_SIZE); \ | |
5c636aa0 | 101 | __entry_tramp_text_end = .; |
c7b9adaf WD |
102 | #else |
103 | #define TRAMP_TEXT | |
104 | #endif | |
105 | ||
a352ea3e AB |
106 | /* |
107 | * The size of the PE/COFF section that covers the kernel image, which | |
348a625d AB |
108 | * runs from _stext to _edata, must be a round multiple of the PE/COFF |
109 | * FileAlignment, which we set to its minimum value of 0x200. '_stext' | |
a352ea3e AB |
110 | * itself is 4 KB aligned, so padding out _edata to a 0x200 aligned |
111 | * boundary should be sufficient. | |
112 | */ | |
113 | PECOFF_FILE_ALIGNMENT = 0x200; | |
114 | ||
115 | #ifdef CONFIG_EFI | |
116 | #define PECOFF_EDATA_PADDING \ | |
117 | .pecoff_edata_padding : { BYTE(0); . = ALIGN(PECOFF_FILE_ALIGNMENT); } | |
118 | #else | |
119 | #define PECOFF_EDATA_PADDING | |
120 | #endif | |
121 | ||
8c2c3df3 CM |
122 | SECTIONS |
123 | { | |
124 | /* | |
125 | * XXX: The linker does not define how output sections are | |
126 | * assigned to input sections when there are multiple statements | |
127 | * matching the same input section name. There is no documented | |
128 | * order of matching. | |
129 | */ | |
2883352b | 130 | DISCARDS |
8c2c3df3 | 131 | /DISCARD/ : { |
1e48ef7f | 132 | *(.interp .dynamic) |
3bbd3db8 | 133 | *(.dynsym .dynstr .hash .gnu.hash) |
8c2c3df3 CM |
134 | } |
135 | ||
120dc60d | 136 | . = KIMAGE_VADDR; |
8c2c3df3 CM |
137 | |
138 | .head.text : { | |
139 | _text = .; | |
140 | HEAD_TEXT | |
141 | } | |
e2a073dd | 142 | .text : ALIGN(SEGMENT_ALIGN) { /* Real text segment */ |
8c2c3df3 | 143 | _stext = .; /* Text and read-only data */ |
8c2c3df3 | 144 | IRQENTRY_TEXT |
be7635e7 | 145 | SOFTIRQENTRY_TEXT |
888b3c87 | 146 | ENTRY_TEXT |
8c2c3df3 CM |
147 | TEXT_TEXT |
148 | SCHED_TEXT | |
6727ad9e | 149 | CPUIDLE_TEXT |
8c2c3df3 | 150 | LOCK_TEXT |
2dd0e8d2 | 151 | KPROBES_TEXT |
2240bbb6 | 152 | HYPERVISOR_TEXT |
5dfe9d7d | 153 | IDMAP_TEXT |
82869ac5 | 154 | HIBERNATE_TEXT |
c7b9adaf | 155 | TRAMP_TEXT |
8c2c3df3 CM |
156 | *(.fixup) |
157 | *(.gnu.warning) | |
158 | . = ALIGN(16); | |
159 | *(.got) /* Global offset table */ | |
160 | } | |
161 | ||
be288182 KC |
162 | /* |
163 | * Make sure that the .got.plt is either completely empty or it | |
164 | * contains only the lazy dispatch entries. | |
165 | */ | |
166 | .got.plt : { *(.got.plt) } | |
167 | ASSERT(SIZEOF(.got.plt) == 0 || SIZEOF(.got.plt) == 0x18, | |
168 | "Unexpected GOT/PLT entries detected!") | |
169 | ||
97740051 | 170 | . = ALIGN(SEGMENT_ALIGN); |
9fdc14c5 AB |
171 | _etext = .; /* End of text section */ |
172 | ||
19f6bc32 KC |
173 | /* everything from this point to __init_begin will be marked RO NX */ |
174 | RO_DATA(PAGE_SIZE) | |
8c2c3df3 | 175 | |
8eb7e28d JY |
176 | idmap_pg_dir = .; |
177 | . += IDMAP_DIR_SIZE; | |
9d2d75ed | 178 | idmap_pg_end = .; |
8eb7e28d JY |
179 | |
180 | #ifdef CONFIG_UNMAP_KERNEL_AT_EL0 | |
181 | tramp_pg_dir = .; | |
182 | . += PAGE_SIZE; | |
183 | #endif | |
184 | ||
833be850 MR |
185 | reserved_pg_dir = .; |
186 | . += PAGE_SIZE; | |
187 | ||
8eb7e28d JY |
188 | swapper_pg_dir = .; |
189 | . += PAGE_SIZE; | |
8eb7e28d | 190 | |
97740051 | 191 | . = ALIGN(SEGMENT_ALIGN); |
8c2c3df3 | 192 | __init_begin = .; |
2ebe088b | 193 | __inittext_begin = .; |
8c2c3df3 CM |
194 | |
195 | INIT_TEXT_SECTION(8) | |
ca2ef4ff MR |
196 | |
197 | __exittext_begin = .; | |
8c2c3df3 | 198 | .exit.text : { |
1eae811d | 199 | EXIT_TEXT |
8c2c3df3 | 200 | } |
ca2ef4ff | 201 | __exittext_end = .; |
da141706 | 202 | |
2ebe088b AB |
203 | . = ALIGN(4); |
204 | .altinstructions : { | |
205 | __alt_instructions = .; | |
206 | *(.altinstructions) | |
207 | __alt_instructions_end = .; | |
208 | } | |
2ebe088b | 209 | |
76085aff | 210 | . = ALIGN(SEGMENT_ALIGN); |
2ebe088b AB |
211 | __inittext_end = .; |
212 | __initdata_begin = .; | |
213 | ||
8c2c3df3 CM |
214 | .init.data : { |
215 | INIT_DATA | |
216 | INIT_SETUP(16) | |
217 | INIT_CALLS | |
218 | CON_INITCALL | |
8c2c3df3 | 219 | INIT_RAM_FS |
ba4259a6 | 220 | *(.init.altinstructions .init.bss) /* from the EFI stub */ |
8c2c3df3 CM |
221 | } |
222 | .exit.data : { | |
1eae811d | 223 | EXIT_DATA |
8c2c3df3 CM |
224 | } |
225 | ||
98fb7548 | 226 | PERCPU_SECTION(L1_CACHE_BYTES) |
30c95391 | 227 | HYPERVISOR_PERCPU_SECTION |
8c2c3df3 | 228 | |
8c49b5d4 DB |
229 | HYPERVISOR_RELOC_SECTION |
230 | ||
3bbd3db8 | 231 | .rela.dyn : ALIGN(8) { |
1e48ef7f | 232 | *(.rela .rela*) |
1e48ef7f | 233 | } |
e039ee4e | 234 | |
3bbd3db8 AB |
235 | __rela_offset = ABSOLUTE(ADDR(.rela.dyn) - KIMAGE_VADDR); |
236 | __rela_size = SIZEOF(.rela.dyn); | |
0cd3defe | 237 | |
5cf896fb PC |
238 | #ifdef CONFIG_RELR |
239 | .relr.dyn : ALIGN(8) { | |
240 | *(.relr.dyn) | |
241 | } | |
242 | ||
243 | __relr_offset = ABSOLUTE(ADDR(.relr.dyn) - KIMAGE_VADDR); | |
244 | __relr_size = SIZEOF(.relr.dyn); | |
245 | #endif | |
246 | ||
97740051 | 247 | . = ALIGN(SEGMENT_ALIGN); |
2ebe088b | 248 | __initdata_end = .; |
9aa4ec15 MR |
249 | __init_end = .; |
250 | ||
3c620626 | 251 | _data = .; |
3c620626 | 252 | _sdata = .; |
c9174047 | 253 | RW_DATA(L1_CACHE_BYTES, PAGE_SIZE, THREAD_ALIGN) |
b6113038 | 254 | |
2d7bf218 DB |
255 | HYPERVISOR_DATA_SECTIONS |
256 | ||
b6113038 JM |
257 | /* |
258 | * Data written with the MMU off but read with the MMU on requires | |
259 | * cache lines to be invalidated, discarding up to a Cache Writeback | |
260 | * Granule (CWG) of data from the cache. Keep the section that | |
261 | * requires this type of maintenance to be in its own Cache Writeback | |
262 | * Granule (CWG) area so the cache maintenance operations don't | |
263 | * interfere with adjacent data. | |
264 | */ | |
265 | .mmuoff.data.write : ALIGN(SZ_2K) { | |
266 | __mmuoff_data_start = .; | |
267 | *(.mmuoff.data.write) | |
268 | } | |
269 | . = ALIGN(SZ_2K); | |
270 | .mmuoff.data.read : { | |
271 | *(.mmuoff.data.read) | |
272 | __mmuoff_data_end = .; | |
273 | } | |
274 | ||
a352ea3e | 275 | PECOFF_EDATA_PADDING |
cad27ef2 | 276 | __pecoff_data_rawsize = ABSOLUTE(. - __initdata_begin); |
3c620626 | 277 | _edata = .; |
8c2c3df3 | 278 | |
8c2c3df3 | 279 | BSS_SECTION(0, 0, 0) |
bd00cd5f MR |
280 | |
281 | . = ALIGN(PAGE_SIZE); | |
2b5548b6 JY |
282 | init_pg_dir = .; |
283 | . += INIT_DIR_SIZE; | |
284 | init_pg_end = .; | |
285 | ||
76085aff | 286 | . = ALIGN(SEGMENT_ALIGN); |
cad27ef2 | 287 | __pecoff_data_size = ABSOLUTE(. - __initdata_begin); |
8c2c3df3 CM |
288 | _end = .; |
289 | ||
290 | STABS_DEBUG | |
578d7f0f | 291 | DWARF_DEBUG |
c604abc3 | 292 | ELF_DETAILS |
a2c1d73b MR |
293 | |
294 | HEAD_SYMBOLS | |
be288182 KC |
295 | |
296 | /* | |
297 | * Sections that should stay zero sized, which is safer to | |
298 | * explicitly check instead of blindly discarding. | |
299 | */ | |
300 | .plt : { | |
5f692a81 | 301 | *(.plt) *(.plt.*) *(.iplt) *(.igot .igot.plt) |
be288182 KC |
302 | } |
303 | ASSERT(SIZEOF(.plt) == 0, "Unexpected run-time procedure linkages detected!") | |
304 | ||
305 | .data.rel.ro : { *(.data.rel.ro) } | |
306 | ASSERT(SIZEOF(.data.rel.ro) == 0, "Unexpected RELRO detected!") | |
8c2c3df3 | 307 | } |
2240bbb6 | 308 | |
90776dd1 KC |
309 | #include "image-vars.h" |
310 | ||
2240bbb6 | 311 | /* |
5dfe9d7d | 312 | * The HYP init code and ID map text can't be longer than a page each, |
06f75a1f | 313 | * and should not cross a page boundary. |
2240bbb6 | 314 | */ |
06f75a1f AB |
315 | ASSERT(__hyp_idmap_text_end - (__hyp_idmap_text_start & ~(SZ_4K - 1)) <= SZ_4K, |
316 | "HYP init code too big or misaligned") | |
5dfe9d7d AB |
317 | ASSERT(__idmap_text_end - (__idmap_text_start & ~(SZ_4K - 1)) <= SZ_4K, |
318 | "ID map text too big or misaligned") | |
82869ac5 JM |
319 | #ifdef CONFIG_HIBERNATION |
320 | ASSERT(__hibernate_exit_text_end - (__hibernate_exit_text_start & ~(SZ_4K - 1)) | |
321 | <= SZ_4K, "Hibernate exit text too big or misaligned") | |
322 | #endif | |
6c27c408 WD |
323 | #ifdef CONFIG_UNMAP_KERNEL_AT_EL0 |
324 | ASSERT((__entry_tramp_text_end - __entry_tramp_text_start) == PAGE_SIZE, | |
325 | "Entry trampoline text too big") | |
326 | #endif | |
da57a369 MR |
327 | /* |
328 | * If padding is applied before .head.text, virt<->phys conversions will fail. | |
329 | */ | |
120dc60d | 330 | ASSERT(_text == KIMAGE_VADDR, "HEAD is misaligned") |
00ef5434 JG |
331 | |
332 | ASSERT(swapper_pg_dir - reserved_pg_dir == RESERVED_SWAPPER_OFFSET, | |
333 | "RESERVED_SWAPPER_OFFSET is wrong!") | |
0188a894 JG |
334 | |
335 | #ifdef CONFIG_UNMAP_KERNEL_AT_EL0 | |
336 | ASSERT(swapper_pg_dir - tramp_pg_dir == TRAMP_SWAPPER_OFFSET, | |
337 | "TRAMP_SWAPPER_OFFSET is wrong!") | |
338 | #endif |