xref: /linux/arch/powerpc/kernel/vmlinux.lds.S (revision 27258e448eb301cf89e351df87aa8cb916653bf2) 
1#ifdef CONFIG_PPC64
2#define PROVIDE32(x)	PROVIDE(__unused__##x)
3#else
4#define PROVIDE32(x)	PROVIDE(x)
5#endif
6#include <asm/page.h>
7#include <asm-generic/vmlinux.lds.h>
8#include <asm/cache.h>
9
10ENTRY(_stext)
11
12PHDRS {
13	kernel PT_LOAD FLAGS(7); /* RWX */
14	notes PT_NOTE FLAGS(0);
15	dummy PT_NOTE FLAGS(0);
16
17	/* binutils < 2.18 has a bug that makes it misbehave when taking an
18	   ELF file with all segments at load address 0 as input.  This
19	   happens when running "strip" on vmlinux, because of the AT() magic
20	   in this linker script.  People using GCC >= 4.2 won't run into
21	   this problem, because the "build-id" support will put some data
22	   into the "notes" segment (at a non-zero load address).
23
24	   To work around this, we force some data into both the "dummy"
25	   segment and the kernel segment, so the dummy segment will get a
26	   non-zero load address.  It's not enough to always create the
27	   "notes" segment, since if nothing gets assigned to it, its load
28	   address will be zero.  */
29}
30
31#ifdef CONFIG_PPC64
32OUTPUT_ARCH(powerpc:common64)
33jiffies = jiffies_64;
34#else
35OUTPUT_ARCH(powerpc:common)
36jiffies = jiffies_64 + 4;
37#endif
38SECTIONS
39{
40	. = KERNELBASE;
41
42/*
43 * Text, read only data and other permanent read-only sections
44 */
45
46	/* Text and gots */
47	.text : AT(ADDR(.text) - LOAD_OFFSET) {
48		ALIGN_FUNCTION();
49		HEAD_TEXT
50		_text = .;
51		/* careful! __ftr_alt_* sections need to be close to .text */
52		*(.text .fixup __ftr_alt_* .ref.text)
53		SCHED_TEXT
54		LOCK_TEXT
55		KPROBES_TEXT
56		IRQENTRY_TEXT
57
58#ifdef CONFIG_PPC32
59		*(.got1)
60		__got2_start = .;
61		*(.got2)
62		__got2_end = .;
63#endif /* CONFIG_PPC32 */
64
65	} :kernel
66
67	. = ALIGN(PAGE_SIZE);
68	_etext = .;
69	PROVIDE32 (etext = .);
70
71	/* Read-only data */
72	RODATA
73
74	/* Exception & bug tables */
75	__ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {
76		__start___ex_table = .;
77		*(__ex_table)
78		__stop___ex_table = .;
79	}
80
81	NOTES :kernel :notes
82
83	/* The dummy segment contents for the bug workaround mentioned above
84	   near PHDRS.  */
85	.dummy : AT(ADDR(.dummy) - LOAD_OFFSET) {
86		LONG(0)
87		LONG(0)
88		LONG(0)
89	} :kernel :dummy
90
91/*
92 * Init sections discarded at runtime
93 */
94	. = ALIGN(PAGE_SIZE);
95	__init_begin = .;
96
97	.init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {
98		_sinittext = .;
99		INIT_TEXT
100		_einittext = .;
101	} :kernel
102
103	/* .exit.text is discarded at runtime, not link time,
104	 * to deal with references from __bug_table
105	 */
106	.exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) {
107		EXIT_TEXT
108	}
109
110	.init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {
111		INIT_DATA
112		__vtop_table_begin = .;
113		*(.vtop_fixup);
114		__vtop_table_end = .;
115		__ptov_table_begin = .;
116		*(.ptov_fixup);
117		__ptov_table_end = .;
118#ifdef CONFIG_PPC_ISERIES
119		__dt_strings_start = .;
120		*(.dt_strings);
121		__dt_strings_end = .;
122#endif
123	}
124
125	. = ALIGN(16);
126	.init.setup : AT(ADDR(.init.setup) - LOAD_OFFSET) {
127		__setup_start = .;
128		*(.init.setup)
129		__setup_end = .;
130	}
131
132	.initcall.init : AT(ADDR(.initcall.init) - LOAD_OFFSET) {
133		__initcall_start = .;
134		INITCALLS
135		__initcall_end = .;
136		}
137
138	.con_initcall.init : AT(ADDR(.con_initcall.init) - LOAD_OFFSET) {
139		__con_initcall_start = .;
140		*(.con_initcall.init)
141		__con_initcall_end = .;
142	}
143
144	SECURITY_INIT
145
146	. = ALIGN(8);
147	__ftr_fixup : AT(ADDR(__ftr_fixup) - LOAD_OFFSET) {
148		__start___ftr_fixup = .;
149		*(__ftr_fixup)
150		__stop___ftr_fixup = .;
151	}
152	. = ALIGN(8);
153	__mmu_ftr_fixup : AT(ADDR(__mmu_ftr_fixup) - LOAD_OFFSET) {
154		__start___mmu_ftr_fixup = .;
155		*(__mmu_ftr_fixup)
156		__stop___mmu_ftr_fixup = .;
157	}
158	. = ALIGN(8);
159	__lwsync_fixup : AT(ADDR(__lwsync_fixup) - LOAD_OFFSET) {
160		__start___lwsync_fixup = .;
161		*(__lwsync_fixup)
162		__stop___lwsync_fixup = .;
163	}
164#ifdef CONFIG_PPC64
165	. = ALIGN(8);
166	__fw_ftr_fixup : AT(ADDR(__fw_ftr_fixup) - LOAD_OFFSET) {
167		__start___fw_ftr_fixup = .;
168		*(__fw_ftr_fixup)
169		__stop___fw_ftr_fixup = .;
170	}
171#endif
172#ifdef CONFIG_BLK_DEV_INITRD
173	. = ALIGN(PAGE_SIZE);
174	.init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET) {
175		__initramfs_start = .;
176		*(.init.ramfs)
177		__initramfs_end = .;
178	}
179#endif
180	PERCPU(PAGE_SIZE)
181
182	. = ALIGN(8);
183	.machine.desc : AT(ADDR(.machine.desc) - LOAD_OFFSET) {
184		__machine_desc_start = . ;
185		*(.machine.desc)
186		__machine_desc_end = . ;
187	}
188#ifdef CONFIG_RELOCATABLE
189	. = ALIGN(8);
190	.dynsym : AT(ADDR(.dynsym) - LOAD_OFFSET) { *(.dynsym) }
191	.dynstr : AT(ADDR(.dynstr) - LOAD_OFFSET) { *(.dynstr) }
192	.dynamic : AT(ADDR(.dynamic) - LOAD_OFFSET)
193	{
194		__dynamic_start = .;
195		*(.dynamic)
196	}
197	.hash : AT(ADDR(.hash) - LOAD_OFFSET) { *(.hash) }
198	.interp : AT(ADDR(.interp) - LOAD_OFFSET) { *(.interp) }
199	.rela.dyn : AT(ADDR(.rela.dyn) - LOAD_OFFSET)
200	{
201		__rela_dyn_start = .;
202		*(.rela*)
203	}
204#endif
205
206	/* freed after init ends here */
207	. = ALIGN(PAGE_SIZE);
208	__init_end = .;
209
210/*
211 * And now the various read/write data
212 */
213
214	. = ALIGN(PAGE_SIZE);
215	_sdata = .;
216
217#ifdef CONFIG_PPC32
218	.data : AT(ADDR(.data) - LOAD_OFFSET) {
219		DATA_DATA
220		*(.sdata)
221		*(.got.plt) *(.got)
222	}
223#else
224	.data : AT(ADDR(.data) - LOAD_OFFSET) {
225		DATA_DATA
226		*(.data.rel*)
227		*(.toc1)
228		*(.branch_lt)
229	}
230
231	.opd : AT(ADDR(.opd) - LOAD_OFFSET) {
232		*(.opd)
233	}
234
235	.got : AT(ADDR(.got) - LOAD_OFFSET) {
236		__toc_start = .;
237		*(.got)
238		*(.toc)
239	}
240#endif
241
242	/* The initial task and kernel stack */
243#ifdef CONFIG_PPC32
244	. = ALIGN(8192);
245#else
246	. = ALIGN(16384);
247#endif
248	.data.init_task : AT(ADDR(.data.init_task) - LOAD_OFFSET) {
249		*(.data.init_task)
250	}
251
252	. = ALIGN(PAGE_SIZE);
253	.data.page_aligned : AT(ADDR(.data.page_aligned) - LOAD_OFFSET) {
254		*(.data.page_aligned)
255	}
256
257	. = ALIGN(L1_CACHE_BYTES);
258	.data.cacheline_aligned : AT(ADDR(.data.cacheline_aligned) - LOAD_OFFSET) {
259		*(.data.cacheline_aligned)
260	}
261
262	. = ALIGN(L1_CACHE_BYTES);
263	.data.read_mostly : AT(ADDR(.data.read_mostly) - LOAD_OFFSET) {
264		*(.data.read_mostly)
265	}
266
267	. = ALIGN(PAGE_SIZE);
268	.data_nosave : AT(ADDR(.data_nosave) - LOAD_OFFSET) {
269		__nosave_begin = .;
270		*(.data.nosave)
271		. = ALIGN(PAGE_SIZE);
272		__nosave_end = .;
273	}
274
275	. = ALIGN(PAGE_SIZE);
276	_edata  =  .;
277	PROVIDE32 (edata = .);
278
279/*
280 * And finally the bss
281 */
282
283	.bss : AT(ADDR(.bss) - LOAD_OFFSET) {
284		__bss_start = .;
285		*(.sbss) *(.scommon)
286		*(.dynbss)
287		*(.bss)
288		*(COMMON)
289		__bss_stop = .;
290	}
291
292	. = ALIGN(PAGE_SIZE);
293	_end = . ;
294	PROVIDE32 (end = .);
295
296	/* Sections to be discarded. */
297	DISCARDS
298}
299