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