1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifdef CONFIG_PPC64
3 #define PROVIDE32(x) PROVIDE(__unused__##x)
4 #else
5 #define PROVIDE32(x) PROVIDE(x)
6 #endif
7
8 #define BSS_FIRST_SECTIONS *(.bss.prominit)
9 #define EMITS_PT_NOTE
10 #define RO_EXCEPTION_TABLE_ALIGN 0
11 #define RUNTIME_DISCARD_EXIT
12
13 #define SOFT_MASK_TABLE(align) \
14 . = ALIGN(align); \
15 __soft_mask_table : AT(ADDR(__soft_mask_table) - LOAD_OFFSET) { \
16 __start___soft_mask_table = .; \
17 KEEP(*(__soft_mask_table)) \
18 __stop___soft_mask_table = .; \
19 }
20
21 #define RESTART_TABLE(align) \
22 . = ALIGN(align); \
23 __restart_table : AT(ADDR(__restart_table) - LOAD_OFFSET) { \
24 __start___restart_table = .; \
25 KEEP(*(__restart_table)) \
26 __stop___restart_table = .; \
27 }
28
29 #include <asm/page.h>
30 #include <asm-generic/vmlinux.lds.h>
31 #include <asm/cache.h>
32 #include <asm/thread_info.h>
33
34 #define STRICT_ALIGN_SIZE (1 << CONFIG_DATA_SHIFT)
35
36 #if STRICT_ALIGN_SIZE < PAGE_SIZE
37 #error "CONFIG_DATA_SHIFT must be >= PAGE_SHIFT"
38 #endif
39
40 ENTRY(_stext)
41
42 PHDRS {
43 text PT_LOAD FLAGS(7); /* RWX */
44 note PT_NOTE FLAGS(0);
45 }
46
47 #ifdef CONFIG_PPC64
48 OUTPUT_ARCH(powerpc:common64)
49 jiffies = jiffies_64;
50 #else
51 OUTPUT_ARCH(powerpc:common)
52 jiffies = jiffies_64 + 4;
53 #endif
54 SECTIONS
55 {
56 . = KERNELBASE;
57
58 /*
59 * Text, read only data and other permanent read-only sections
60 */
61
62 _text = .;
63 _stext = .;
64
65 /*
66 * Head text.
67 * This needs to be in its own output section to avoid ld placing
68 * branch trampoline stubs randomly throughout the fixed sections,
69 * which it will do (even if the branch comes from another section)
70 * in order to optimize stub generation.
71 */
72 .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) {
73 #ifdef CONFIG_PPC64
74 KEEP(*(.head.text.first_256B));
75 #ifdef CONFIG_PPC_BOOK3E_64
76 #else
77 KEEP(*(.head.text.real_vectors));
78 *(.head.text.real_trampolines);
79 KEEP(*(.head.text.virt_vectors));
80 *(.head.text.virt_trampolines);
81 # if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV)
82 KEEP(*(.head.data.fwnmi_page));
83 # endif
84 #endif
85 #else /* !CONFIG_PPC64 */
86 HEAD_TEXT
87 #endif
88 } :text
89
90 __head_end = .;
91
92 #ifdef CONFIG_PPC64
93 /*
94 * ALIGN(0) overrides the default output section alignment because
95 * this needs to start right after .head.text in order for fixed
96 * section placement to work.
97 */
98 .text ALIGN(0) : AT(ADDR(.text) - LOAD_OFFSET) {
99 #ifdef CONFIG_LD_HEAD_STUB_CATCH
100 KEEP(*(.linker_stub_catch));
101 . = . ;
102 #endif
103
104 #else
105 .text : AT(ADDR(.text) - LOAD_OFFSET) {
106 ALIGN_FUNCTION();
107 #endif
108 /* careful! __ftr_alt_* sections need to be close to .text */
109 *(.text.hot .text.hot.* TEXT_MAIN .text.fixup .text.unlikely .text.unlikely.* .fixup __ftr_alt_* .ref.text);
110 *(.tramp.ftrace.text);
111 NOINSTR_TEXT
112 SCHED_TEXT
113 LOCK_TEXT
114 KPROBES_TEXT
115 IRQENTRY_TEXT
116 SOFTIRQENTRY_TEXT
117 /*
118 * -Os builds call FP save/restore functions. The powerpc64
119 * linker generates those on demand in the .sfpr section.
120 * .sfpr gets placed at the beginning of a group of input
121 * sections, which can break start-of-text offset if it is
122 * included with the main text sections, so put it by itself.
123 */
124 *(.sfpr);
125 *(.text.asan.* .text.tsan.*)
126 } :text
127
128 . = ALIGN(PAGE_SIZE);
129 _etext = .;
130 PROVIDE32 (etext = .);
131
132 /* Read-only data */
133 RO_DATA(PAGE_SIZE)
134
135 #ifdef CONFIG_PPC32
136 .sdata2 : AT(ADDR(.sdata2) - LOAD_OFFSET) {
137 *(.sdata2)
138 }
139 #endif
140
141 .data.rel.ro : AT(ADDR(.data.rel.ro) - LOAD_OFFSET) {
142 *(.data.rel.ro .data.rel.ro.*)
143 }
144
145 .branch_lt : AT(ADDR(.branch_lt) - LOAD_OFFSET) {
146 *(.branch_lt)
147 }
148
149 #ifdef CONFIG_PPC32
150 .got1 : AT(ADDR(.got1) - LOAD_OFFSET) {
151 *(.got1)
152 }
153 .got2 : AT(ADDR(.got2) - LOAD_OFFSET) {
154 __got2_start = .;
155 *(.got2)
156 __got2_end = .;
157 }
158 .got : AT(ADDR(.got) - LOAD_OFFSET) {
159 *(.got)
160 *(.got.plt)
161 }
162 .plt : AT(ADDR(.plt) - LOAD_OFFSET) {
163 /* XXX: is .plt (and .got.plt) required? */
164 *(.plt)
165 }
166
167 #else /* CONFIG_PPC32 */
168 #ifndef CONFIG_PPC_KERNEL_PCREL
169 .toc1 : AT(ADDR(.toc1) - LOAD_OFFSET) {
170 *(.toc1)
171 }
172 #endif
173
174 .got : AT(ADDR(.got) - LOAD_OFFSET) ALIGN(256) {
175 #ifdef CONFIG_PPC_KERNEL_PCREL
176 *(.got)
177 #else
178 *(.got .toc)
179 #endif
180 }
181
182 SOFT_MASK_TABLE(8)
183 RESTART_TABLE(8)
184
185 #ifdef CONFIG_PPC64_ELF_ABI_V1
186 .opd : AT(ADDR(.opd) - LOAD_OFFSET) {
187 __start_opd = .;
188 KEEP(*(.opd))
189 __end_opd = .;
190 }
191 #endif
192
193 . = ALIGN(8);
194 __stf_entry_barrier_fixup : AT(ADDR(__stf_entry_barrier_fixup) - LOAD_OFFSET) {
195 __start___stf_entry_barrier_fixup = .;
196 *(__stf_entry_barrier_fixup)
197 __stop___stf_entry_barrier_fixup = .;
198 }
199
200 . = ALIGN(8);
201 __uaccess_flush_fixup : AT(ADDR(__uaccess_flush_fixup) - LOAD_OFFSET) {
202 __start___uaccess_flush_fixup = .;
203 *(__uaccess_flush_fixup)
204 __stop___uaccess_flush_fixup = .;
205 }
206
207 . = ALIGN(8);
208 __entry_flush_fixup : AT(ADDR(__entry_flush_fixup) - LOAD_OFFSET) {
209 __start___entry_flush_fixup = .;
210 *(__entry_flush_fixup)
211 __stop___entry_flush_fixup = .;
212 }
213
214 . = ALIGN(8);
215 __scv_entry_flush_fixup : AT(ADDR(__scv_entry_flush_fixup) - LOAD_OFFSET) {
216 __start___scv_entry_flush_fixup = .;
217 *(__scv_entry_flush_fixup)
218 __stop___scv_entry_flush_fixup = .;
219 }
220
221 . = ALIGN(8);
222 __stf_exit_barrier_fixup : AT(ADDR(__stf_exit_barrier_fixup) - LOAD_OFFSET) {
223 __start___stf_exit_barrier_fixup = .;
224 *(__stf_exit_barrier_fixup)
225 __stop___stf_exit_barrier_fixup = .;
226 }
227
228 . = ALIGN(8);
229 __rfi_flush_fixup : AT(ADDR(__rfi_flush_fixup) - LOAD_OFFSET) {
230 __start___rfi_flush_fixup = .;
231 *(__rfi_flush_fixup)
232 __stop___rfi_flush_fixup = .;
233 }
234 #endif /* CONFIG_PPC32 */
235
236 #ifdef CONFIG_PPC_BARRIER_NOSPEC
237 . = ALIGN(8);
238 __spec_barrier_fixup : AT(ADDR(__spec_barrier_fixup) - LOAD_OFFSET) {
239 __start___barrier_nospec_fixup = .;
240 *(__barrier_nospec_fixup)
241 __stop___barrier_nospec_fixup = .;
242 }
243 #endif /* CONFIG_PPC_BARRIER_NOSPEC */
244
245 #ifdef CONFIG_PPC_E500
246 . = ALIGN(8);
247 __spec_btb_flush_fixup : AT(ADDR(__spec_btb_flush_fixup) - LOAD_OFFSET) {
248 __start__btb_flush_fixup = .;
249 *(__btb_flush_fixup)
250 __stop__btb_flush_fixup = .;
251 }
252 #endif
253
254 /*
255 * Various code relies on __init_begin being at the strict RWX boundary.
256 */
257 . = ALIGN(STRICT_ALIGN_SIZE);
258 __srwx_boundary = .;
259 __end_rodata = .;
260 __init_begin = .;
261
262 /*
263 * Init sections discarded at runtime
264 */
265 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {
266 _sinittext = .;
267 INIT_TEXT
268
269 /*
270 *.init.text might be RO so we must ensure this section ends on
271 * a page boundary.
272 */
273 . = ALIGN(PAGE_SIZE);
274 _einittext = .;
275 *(.tramp.ftrace.init);
276 } :text
277
278 /* .exit.text is discarded at runtime, not link time,
279 * to deal with references from __bug_table
280 */
281 .exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) {
282 __exittext_begin = .;
283 EXIT_TEXT
284 __exittext_end = .;
285 }
286
287 . = ALIGN(PAGE_SIZE);
288
289 INIT_DATA_SECTION(16)
290
291 . = ALIGN(8);
292 __ftr_fixup : AT(ADDR(__ftr_fixup) - LOAD_OFFSET) {
293 __start___ftr_fixup = .;
294 KEEP(*(__ftr_fixup))
295 __stop___ftr_fixup = .;
296 }
297 . = ALIGN(8);
298 __mmu_ftr_fixup : AT(ADDR(__mmu_ftr_fixup) - LOAD_OFFSET) {
299 __start___mmu_ftr_fixup = .;
300 KEEP(*(__mmu_ftr_fixup))
301 __stop___mmu_ftr_fixup = .;
302 }
303 . = ALIGN(8);
304 __lwsync_fixup : AT(ADDR(__lwsync_fixup) - LOAD_OFFSET) {
305 __start___lwsync_fixup = .;
306 KEEP(*(__lwsync_fixup))
307 __stop___lwsync_fixup = .;
308 }
309 #ifdef CONFIG_PPC64
310 . = ALIGN(8);
311 __fw_ftr_fixup : AT(ADDR(__fw_ftr_fixup) - LOAD_OFFSET) {
312 __start___fw_ftr_fixup = .;
313 KEEP(*(__fw_ftr_fixup))
314 __stop___fw_ftr_fixup = .;
315 }
316 #endif
317
318 PERCPU_SECTION(L1_CACHE_BYTES)
319
320 . = ALIGN(8);
321 .machine.desc : AT(ADDR(.machine.desc) - LOAD_OFFSET) {
322 __machine_desc_start = . ;
323 KEEP(*(.machine.desc))
324 __machine_desc_end = . ;
325 }
326 #ifdef CONFIG_RELOCATABLE
327 . = ALIGN(8);
328 .dynsym : AT(ADDR(.dynsym) - LOAD_OFFSET)
329 {
330 __dynamic_symtab = .;
331 *(.dynsym)
332 }
333 .dynstr : AT(ADDR(.dynstr) - LOAD_OFFSET) { *(.dynstr) }
334 .dynamic : AT(ADDR(.dynamic) - LOAD_OFFSET)
335 {
336 __dynamic_start = .;
337 *(.dynamic)
338 }
339 .hash : AT(ADDR(.hash) - LOAD_OFFSET) { *(.hash) }
340 .gnu.hash : AT(ADDR(.gnu.hash) - LOAD_OFFSET) { *(.gnu.hash) }
341 .interp : AT(ADDR(.interp) - LOAD_OFFSET) { *(.interp) }
342 .rela.dyn : AT(ADDR(.rela.dyn) - LOAD_OFFSET)
343 {
344 __rela_dyn_start = .;
345 *(.rela*)
346 }
347 #endif
348 /* .exit.data is discarded at runtime, not link time,
349 * to deal with references from .exit.text
350 */
351 .exit.data : AT(ADDR(.exit.data) - LOAD_OFFSET) {
352 EXIT_DATA
353 }
354
355 /* freed after init ends here */
356 . = ALIGN(PAGE_SIZE);
357 __init_end = .;
358
359 /*
360 * And now the various read/write data
361 */
362
363 . = ALIGN(PAGE_SIZE);
364 _sdata = .;
365
366 .data : AT(ADDR(.data) - LOAD_OFFSET) {
367 DATA_DATA
368 *(.data.rel*)
369 #ifdef CONFIG_PPC32
370 *(SDATA_MAIN)
371 #endif
372 }
373
374 /* The initial task and kernel stack */
375 INIT_TASK_DATA_SECTION(THREAD_ALIGN)
376
377 .data..page_aligned : AT(ADDR(.data..page_aligned) - LOAD_OFFSET) {
378 PAGE_ALIGNED_DATA(PAGE_SIZE)
379 }
380
381 .data..cacheline_aligned : AT(ADDR(.data..cacheline_aligned) - LOAD_OFFSET) {
382 CACHELINE_ALIGNED_DATA(L1_CACHE_BYTES)
383 }
384
385 .data..read_mostly : AT(ADDR(.data..read_mostly) - LOAD_OFFSET) {
386 READ_MOSTLY_DATA(L1_CACHE_BYTES)
387 }
388
389 . = ALIGN(PAGE_SIZE);
390 .data_nosave : AT(ADDR(.data_nosave) - LOAD_OFFSET) {
391 NOSAVE_DATA
392 }
393
394 BUG_TABLE
395
396 . = ALIGN(PAGE_SIZE);
397 _edata = .;
398 PROVIDE32 (edata = .);
399
400 /*
401 * And finally the bss
402 */
403
404 BSS_SECTION(0, 0, 0)
405
406 . = ALIGN(PAGE_SIZE);
407 _end = . ;
408 PROVIDE32 (end = .);
409
410 DWARF_DEBUG
411 ELF_DETAILS
412
413 DISCARDS
414 /DISCARD/ : {
415 *(*.EMB.apuinfo)
416 *(.glink .iplt .plt)
417 *(.gnu.version*)
418 *(.gnu.attributes)
419 *(.eh_frame)
420 #ifndef CONFIG_RELOCATABLE
421 *(.rela*)
422 #endif
423 }
424 }
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