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#include <asm/page.h>
8#include <asm-generic/vmlinux.lds.h>
9#include <asm/cache.h>
10#include <asm/thread_info.h>
11
12#if defined(CONFIG_STRICT_KERNEL_RWX) && !defined(CONFIG_PPC32)
13#define STRICT_ALIGN_SIZE	(1 << 24)
14#else
15#define STRICT_ALIGN_SIZE	PAGE_SIZE
16#endif
17
18ENTRY(_stext)
19
20PHDRS {
21	kernel PT_LOAD FLAGS(7); /* RWX */
22	notes PT_NOTE FLAGS(0);
23	dummy PT_NOTE FLAGS(0);
24
25	/* binutils < 2.18 has a bug that makes it misbehave when taking an
26	   ELF file with all segments at load address 0 as input.  This
27	   happens when running "strip" on vmlinux, because of the AT() magic
28	   in this linker script.  People using GCC >= 4.2 won't run into
29	   this problem, because the "build-id" support will put some data
30	   into the "notes" segment (at a non-zero load address).
31
32	   To work around this, we force some data into both the "dummy"
33	   segment and the kernel segment, so the dummy segment will get a
34	   non-zero load address.  It's not enough to always create the
35	   "notes" segment, since if nothing gets assigned to it, its load
36	   address will be zero.  */
37}
38
39#ifdef CONFIG_PPC64
40OUTPUT_ARCH(powerpc:common64)
41jiffies = jiffies_64;
42#else
43OUTPUT_ARCH(powerpc:common)
44jiffies = jiffies_64 + 4;
45#endif
46SECTIONS
47{
48	. = KERNELBASE;
49
50/*
51 * Text, read only data and other permanent read-only sections
52 */
53
54	_text = .;
55	_stext = .;
56
57	/*
58	 * Head text.
59	 * This needs to be in its own output section to avoid ld placing
60	 * branch trampoline stubs randomly throughout the fixed sections,
61	 * which it will do (even if the branch comes from another section)
62	 * in order to optimize stub generation.
63	 */
64	.head.text : AT(ADDR(.head.text) - LOAD_OFFSET) {
65#ifdef CONFIG_PPC64
66		KEEP(*(.head.text.first_256B));
67#ifdef CONFIG_PPC_BOOK3E
68#else
69		KEEP(*(.head.text.real_vectors));
70		*(.head.text.real_trampolines);
71		KEEP(*(.head.text.virt_vectors));
72		*(.head.text.virt_trampolines);
73# if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV)
74		KEEP(*(.head.data.fwnmi_page));
75# endif
76#endif
77#else /* !CONFIG_PPC64 */
78		HEAD_TEXT
79#endif
80	} :kernel
81
82	__head_end = .;
83
84#ifdef CONFIG_PPC64
85	/*
86	 * BLOCK(0) overrides the default output section alignment because
87	 * this needs to start right after .head.text in order for fixed
88	 * section placement to work.
89	 */
90	.text BLOCK(0) : AT(ADDR(.text) - LOAD_OFFSET) {
91#ifdef CONFIG_LD_HEAD_STUB_CATCH
92		*(.linker_stub_catch);
93		. = . ;
94#endif
95
96#else
97	.text : AT(ADDR(.text) - LOAD_OFFSET) {
98		ALIGN_FUNCTION();
99#endif
100		/* careful! __ftr_alt_* sections need to be close to .text */
101		*(.text.hot .text .text.fixup .text.unlikely .fixup __ftr_alt_* .ref.text);
102		SCHED_TEXT
103		CPUIDLE_TEXT
104		LOCK_TEXT
105		KPROBES_TEXT
106		IRQENTRY_TEXT
107		SOFTIRQENTRY_TEXT
108		/*
109		 * -Os builds call FP save/restore functions. The powerpc64
110		 * linker generates those on demand in the .sfpr section.
111		 * .sfpr gets placed at the beginning of a group of input
112		 * sections, which can break start-of-text offset if it is
113		 * included with the main text sections, so put it by itself.
114		 */
115		*(.sfpr);
116		MEM_KEEP(init.text)
117		MEM_KEEP(exit.text)
118
119#ifdef CONFIG_PPC32
120		*(.got1)
121		__got2_start = .;
122		*(.got2)
123		__got2_end = .;
124#endif /* CONFIG_PPC32 */
125
126	} :kernel
127
128	. = ALIGN(PAGE_SIZE);
129	_etext = .;
130	PROVIDE32 (etext = .);
131
132	/* Read-only data */
133	RO_DATA(PAGE_SIZE)
134
135	EXCEPTION_TABLE(0)
136
137	NOTES :kernel :notes
138
139	/* The dummy segment contents for the bug workaround mentioned above
140	   near PHDRS.  */
141	.dummy : AT(ADDR(.dummy) - LOAD_OFFSET) {
142		LONG(0)
143		LONG(0)
144		LONG(0)
145	} :kernel :dummy
146
147/*
148 * Init sections discarded at runtime
149 */
150	. = ALIGN(STRICT_ALIGN_SIZE);
151	__init_begin = .;
152	INIT_TEXT_SECTION(PAGE_SIZE) :kernel
153
154	/* .exit.text is discarded at runtime, not link time,
155	 * to deal with references from __bug_table
156	 */
157	.exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) {
158		EXIT_TEXT
159	}
160
161	.init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {
162		INIT_DATA
163		__vtop_table_begin = .;
164		*(.vtop_fixup);
165		__vtop_table_end = .;
166		__ptov_table_begin = .;
167		*(.ptov_fixup);
168		__ptov_table_end = .;
169	}
170
171	.init.setup : AT(ADDR(.init.setup) - LOAD_OFFSET) {
172		INIT_SETUP(16)
173	}
174
175	.initcall.init : AT(ADDR(.initcall.init) - LOAD_OFFSET) {
176		INIT_CALLS
177	}
178
179	.con_initcall.init : AT(ADDR(.con_initcall.init) - LOAD_OFFSET) {
180		CON_INITCALL
181	}
182
183	SECURITY_INIT
184
185	. = ALIGN(8);
186	__ftr_fixup : AT(ADDR(__ftr_fixup) - LOAD_OFFSET) {
187		__start___ftr_fixup = .;
188		*(__ftr_fixup)
189		__stop___ftr_fixup = .;
190	}
191	. = ALIGN(8);
192	__mmu_ftr_fixup : AT(ADDR(__mmu_ftr_fixup) - LOAD_OFFSET) {
193		__start___mmu_ftr_fixup = .;
194		*(__mmu_ftr_fixup)
195		__stop___mmu_ftr_fixup = .;
196	}
197	. = ALIGN(8);
198	__lwsync_fixup : AT(ADDR(__lwsync_fixup) - LOAD_OFFSET) {
199		__start___lwsync_fixup = .;
200		*(__lwsync_fixup)
201		__stop___lwsync_fixup = .;
202	}
203#ifdef CONFIG_PPC64
204	. = ALIGN(8);
205	__fw_ftr_fixup : AT(ADDR(__fw_ftr_fixup) - LOAD_OFFSET) {
206		__start___fw_ftr_fixup = .;
207		*(__fw_ftr_fixup)
208		__stop___fw_ftr_fixup = .;
209	}
210#endif
211	.init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET) {
212		INIT_RAM_FS
213	}
214
215	PERCPU_SECTION(L1_CACHE_BYTES)
216
217	. = ALIGN(8);
218	.machine.desc : AT(ADDR(.machine.desc) - LOAD_OFFSET) {
219		__machine_desc_start = . ;
220		*(.machine.desc)
221		__machine_desc_end = . ;
222	}
223#ifdef CONFIG_RELOCATABLE
224	. = ALIGN(8);
225	.dynsym : AT(ADDR(.dynsym) - LOAD_OFFSET)
226	{
227#ifdef CONFIG_PPC32
228		__dynamic_symtab = .;
229#endif
230		*(.dynsym)
231	}
232	.dynstr : AT(ADDR(.dynstr) - LOAD_OFFSET) { *(.dynstr) }
233	.dynamic : AT(ADDR(.dynamic) - LOAD_OFFSET)
234	{
235		__dynamic_start = .;
236		*(.dynamic)
237	}
238	.hash : AT(ADDR(.hash) - LOAD_OFFSET) { *(.hash) }
239	.interp : AT(ADDR(.interp) - LOAD_OFFSET) { *(.interp) }
240	.rela.dyn : AT(ADDR(.rela.dyn) - LOAD_OFFSET)
241	{
242		__rela_dyn_start = .;
243		*(.rela*)
244	}
245#endif
246	/* .exit.data is discarded at runtime, not link time,
247	 * to deal with references from .exit.text
248	 */
249	.exit.data : AT(ADDR(.exit.data) - LOAD_OFFSET) {
250		EXIT_DATA
251	}
252
253	/* freed after init ends here */
254	. = ALIGN(PAGE_SIZE);
255	__init_end = .;
256
257/*
258 * And now the various read/write data
259 */
260
261	. = ALIGN(PAGE_SIZE);
262	_sdata = .;
263
264#ifdef CONFIG_PPC32
265	.data : AT(ADDR(.data) - LOAD_OFFSET) {
266		DATA_DATA
267		*(.sdata)
268		*(.sdata2)
269		*(.got.plt) *(.got)
270		*(.plt)
271	}
272#else
273	.data : AT(ADDR(.data) - LOAD_OFFSET) {
274		DATA_DATA
275		*(.data.rel*)
276		*(.toc1)
277		*(.branch_lt)
278	}
279
280	.opd : AT(ADDR(.opd) - LOAD_OFFSET) {
281		*(.opd)
282	}
283
284	. = ALIGN(256);
285	.got : AT(ADDR(.got) - LOAD_OFFSET) {
286		__toc_start = .;
287#ifndef CONFIG_RELOCATABLE
288		__prom_init_toc_start = .;
289		arch/powerpc/kernel/prom_init.o*(.toc .got)
290		__prom_init_toc_end = .;
291#endif
292		*(.got)
293		*(.toc)
294	}
295#endif
296
297	/* The initial task and kernel stack */
298	INIT_TASK_DATA_SECTION(THREAD_SIZE)
299
300	.data..page_aligned : AT(ADDR(.data..page_aligned) - LOAD_OFFSET) {
301		PAGE_ALIGNED_DATA(PAGE_SIZE)
302	}
303
304	.data..cacheline_aligned : AT(ADDR(.data..cacheline_aligned) - LOAD_OFFSET) {
305		CACHELINE_ALIGNED_DATA(L1_CACHE_BYTES)
306	}
307
308	.data..read_mostly : AT(ADDR(.data..read_mostly) - LOAD_OFFSET) {
309		READ_MOSTLY_DATA(L1_CACHE_BYTES)
310	}
311
312	. = ALIGN(PAGE_SIZE);
313	.data_nosave : AT(ADDR(.data_nosave) - LOAD_OFFSET) {
314		NOSAVE_DATA
315	}
316
317	BUG_TABLE
318
319	. = ALIGN(PAGE_SIZE);
320	_edata  =  .;
321	PROVIDE32 (edata = .);
322
323/*
324 * And finally the bss
325 */
326
327	BSS_SECTION(0, 0, 0)
328
329	. = ALIGN(PAGE_SIZE);
330	_end = . ;
331	PROVIDE32 (end = .);
332
333	STABS_DEBUG
334
335	DWARF_DEBUG
336
337	DISCARDS
338	/DISCARD/ : {
339		*(*.EMB.apuinfo)
340		*(.glink .iplt .plt .rela* .comment)
341		*(.gnu.version*)
342		*(.gnu.attributes)
343		*(.eh_frame)
344	}
345}
346