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
11ENTRY(_stext)
12
13PHDRS {
14	kernel PT_LOAD FLAGS(7); /* RWX */
15	notes PT_NOTE FLAGS(0);
16	dummy PT_NOTE FLAGS(0);
17
18	/* binutils < 2.18 has a bug that makes it misbehave when taking an
19	   ELF file with all segments at load address 0 as input.  This
20	   happens when running "strip" on vmlinux, because of the AT() magic
21	   in this linker script.  People using GCC >= 4.2 won't run into
22	   this problem, because the "build-id" support will put some data
23	   into the "notes" segment (at a non-zero load address).
24
25	   To work around this, we force some data into both the "dummy"
26	   segment and the kernel segment, so the dummy segment will get a
27	   non-zero load address.  It's not enough to always create the
28	   "notes" segment, since if nothing gets assigned to it, its load
29	   address will be zero.  */
30}
31
32#ifdef CONFIG_PPC64
33OUTPUT_ARCH(powerpc:common64)
34jiffies = jiffies_64;
35#else
36OUTPUT_ARCH(powerpc:common)
37jiffies = jiffies_64 + 4;
38#endif
39SECTIONS
40{
41	. = KERNELBASE;
42
43/*
44 * Text, read only data and other permanent read-only sections
45 */
46
47	_text = .;
48	_stext = .;
49
50	/*
51	 * Head text.
52	 * This needs to be in its own output section to avoid ld placing
53	 * branch trampoline stubs randomly throughout the fixed sections,
54	 * which it will do (even if the branch comes from another section)
55	 * in order to optimize stub generation.
56	 */
57	.head.text : AT(ADDR(.head.text) - LOAD_OFFSET) {
58#ifdef CONFIG_PPC64
59		KEEP(*(.head.text.first_256B));
60#ifdef CONFIG_PPC_BOOK3E
61# define END_FIXED	0x100
62#else
63		KEEP(*(.head.text.real_vectors));
64		*(.head.text.real_trampolines);
65		KEEP(*(.head.text.virt_vectors));
66		*(.head.text.virt_trampolines);
67# if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV)
68		KEEP(*(.head.data.fwnmi_page));
69#  define END_FIXED	0x8000
70# else
71#  define END_FIXED	0x7000
72# endif
73#endif
74		ASSERT((. == END_FIXED), "vmlinux.lds.S: fixed section overflow error");
75#else /* !CONFIG_PPC64 */
76		HEAD_TEXT
77#endif
78	} :kernel
79
80	/*
81	 * If the build dies here, it's likely code in head_64.S is referencing
82	 * labels it can't reach, and the linker inserting stubs without the
83	 * assembler's knowledge. To debug, remove the above assert and
84	 * rebuild. Look for branch stubs in the fixed section region.
85	 *
86	 * Linker stub generation could be allowed in "trampoline"
87	 * sections if absolutely necessary, but this would require
88	 * some rework of the fixed sections. Before resorting to this,
89	 * consider references that have sufficient addressing range,
90	 * (e.g., hand coded trampolines) so the linker does not have
91	 * to add stubs.
92	 *
93	 * Linker stubs at the top of the main text section are currently not
94	 * detected, and will result in a crash at boot due to offsets being
95	 * wrong.
96	 */
97	.text : AT(ADDR(.text) - LOAD_OFFSET) {
98		ALIGN_FUNCTION();
99		/* careful! __ftr_alt_* sections need to be close to .text */
100		*(.text .fixup __ftr_alt_* .ref.text)
101		SCHED_TEXT
102		CPUIDLE_TEXT
103		LOCK_TEXT
104		KPROBES_TEXT
105		IRQENTRY_TEXT
106		SOFTIRQENTRY_TEXT
107		MEM_KEEP(init.text)
108		MEM_KEEP(exit.text)
109
110#ifdef CONFIG_PPC32
111		*(.got1)
112		__got2_start = .;
113		*(.got2)
114		__got2_end = .;
115#endif /* CONFIG_PPC32 */
116
117	} :kernel
118
119	. = ALIGN(PAGE_SIZE);
120	_etext = .;
121	PROVIDE32 (etext = .);
122
123	/* Read-only data */
124	RODATA
125
126	EXCEPTION_TABLE(0)
127
128	NOTES :kernel :notes
129
130	/* The dummy segment contents for the bug workaround mentioned above
131	   near PHDRS.  */
132	.dummy : AT(ADDR(.dummy) - LOAD_OFFSET) {
133		LONG(0)
134		LONG(0)
135		LONG(0)
136	} :kernel :dummy
137
138/*
139 * Init sections discarded at runtime
140 */
141	. = ALIGN(PAGE_SIZE);
142	__init_begin = .;
143	INIT_TEXT_SECTION(PAGE_SIZE) :kernel
144
145	/* .exit.text is discarded at runtime, not link time,
146	 * to deal with references from __bug_table
147	 */
148	.exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) {
149		EXIT_TEXT
150	}
151
152	.init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {
153		INIT_DATA
154		__vtop_table_begin = .;
155		*(.vtop_fixup);
156		__vtop_table_end = .;
157		__ptov_table_begin = .;
158		*(.ptov_fixup);
159		__ptov_table_end = .;
160	}
161
162	.init.setup : AT(ADDR(.init.setup) - LOAD_OFFSET) {
163		INIT_SETUP(16)
164	}
165
166	.initcall.init : AT(ADDR(.initcall.init) - LOAD_OFFSET) {
167		INIT_CALLS
168	}
169
170	.con_initcall.init : AT(ADDR(.con_initcall.init) - LOAD_OFFSET) {
171		CON_INITCALL
172	}
173
174	SECURITY_INIT
175
176	. = ALIGN(8);
177	__ftr_fixup : AT(ADDR(__ftr_fixup) - LOAD_OFFSET) {
178		__start___ftr_fixup = .;
179		*(__ftr_fixup)
180		__stop___ftr_fixup = .;
181	}
182	. = ALIGN(8);
183	__mmu_ftr_fixup : AT(ADDR(__mmu_ftr_fixup) - LOAD_OFFSET) {
184		__start___mmu_ftr_fixup = .;
185		*(__mmu_ftr_fixup)
186		__stop___mmu_ftr_fixup = .;
187	}
188	. = ALIGN(8);
189	__lwsync_fixup : AT(ADDR(__lwsync_fixup) - LOAD_OFFSET) {
190		__start___lwsync_fixup = .;
191		*(__lwsync_fixup)
192		__stop___lwsync_fixup = .;
193	}
194#ifdef CONFIG_PPC64
195	. = ALIGN(8);
196	__fw_ftr_fixup : AT(ADDR(__fw_ftr_fixup) - LOAD_OFFSET) {
197		__start___fw_ftr_fixup = .;
198		*(__fw_ftr_fixup)
199		__stop___fw_ftr_fixup = .;
200	}
201#endif
202	.init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET) {
203		INIT_RAM_FS
204	}
205
206	PERCPU_SECTION(L1_CACHE_BYTES)
207
208	. = ALIGN(8);
209	.machine.desc : AT(ADDR(.machine.desc) - LOAD_OFFSET) {
210		__machine_desc_start = . ;
211		*(.machine.desc)
212		__machine_desc_end = . ;
213	}
214#ifdef CONFIG_RELOCATABLE
215	. = ALIGN(8);
216	.dynsym : AT(ADDR(.dynsym) - LOAD_OFFSET)
217	{
218#ifdef CONFIG_PPC32
219		__dynamic_symtab = .;
220#endif
221		*(.dynsym)
222	}
223	.dynstr : AT(ADDR(.dynstr) - LOAD_OFFSET) { *(.dynstr) }
224	.dynamic : AT(ADDR(.dynamic) - LOAD_OFFSET)
225	{
226		__dynamic_start = .;
227		*(.dynamic)
228	}
229	.hash : AT(ADDR(.hash) - LOAD_OFFSET) { *(.hash) }
230	.interp : AT(ADDR(.interp) - LOAD_OFFSET) { *(.interp) }
231	.rela.dyn : AT(ADDR(.rela.dyn) - LOAD_OFFSET)
232	{
233		__rela_dyn_start = .;
234		*(.rela*)
235	}
236#endif
237	/* .exit.data is discarded at runtime, not link time,
238	 * to deal with references from .exit.text
239	 */
240	.exit.data : AT(ADDR(.exit.data) - LOAD_OFFSET) {
241		EXIT_DATA
242	}
243
244	/* freed after init ends here */
245	. = ALIGN(PAGE_SIZE);
246	__init_end = .;
247
248/*
249 * And now the various read/write data
250 */
251
252	. = ALIGN(PAGE_SIZE);
253	_sdata = .;
254
255#ifdef CONFIG_PPC32
256	.data : AT(ADDR(.data) - LOAD_OFFSET) {
257		DATA_DATA
258		*(.sdata)
259		*(.got.plt) *(.got)
260	}
261#else
262	.data : AT(ADDR(.data) - LOAD_OFFSET) {
263		DATA_DATA
264		*(.data.rel*)
265		*(.toc1)
266		*(.branch_lt)
267	}
268
269	.opd : AT(ADDR(.opd) - LOAD_OFFSET) {
270		*(.opd)
271	}
272
273	. = ALIGN(256);
274	.got : AT(ADDR(.got) - LOAD_OFFSET) {
275		__toc_start = .;
276#ifndef CONFIG_RELOCATABLE
277		__prom_init_toc_start = .;
278		arch/powerpc/kernel/prom_init.o*(.toc .got)
279		__prom_init_toc_end = .;
280#endif
281		*(.got)
282		*(.toc)
283	}
284#endif
285
286	/* The initial task and kernel stack */
287	INIT_TASK_DATA_SECTION(THREAD_SIZE)
288
289	.data..page_aligned : AT(ADDR(.data..page_aligned) - LOAD_OFFSET) {
290		PAGE_ALIGNED_DATA(PAGE_SIZE)
291	}
292
293	.data..cacheline_aligned : AT(ADDR(.data..cacheline_aligned) - LOAD_OFFSET) {
294		CACHELINE_ALIGNED_DATA(L1_CACHE_BYTES)
295	}
296
297	.data..read_mostly : AT(ADDR(.data..read_mostly) - LOAD_OFFSET) {
298		READ_MOSTLY_DATA(L1_CACHE_BYTES)
299	}
300
301	. = ALIGN(PAGE_SIZE);
302	.data_nosave : AT(ADDR(.data_nosave) - LOAD_OFFSET) {
303		NOSAVE_DATA
304	}
305
306	. = ALIGN(PAGE_SIZE);
307	_edata  =  .;
308	PROVIDE32 (edata = .);
309
310/*
311 * And finally the bss
312 */
313
314	BSS_SECTION(0, 0, 0)
315
316	. = ALIGN(PAGE_SIZE);
317	_end = . ;
318	PROVIDE32 (end = .);
319
320	/* Sections to be discarded. */
321	DISCARDS
322}
323