Commit | Line | Data |
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1da177e4 LT |
1 | /* ld script to make ARM Linux kernel |
2 | * taken from the i386 version by Russell King | |
3 | * Written by Martin Mares <mj@atrey.karlin.mff.cuni.cz> | |
4 | */ | |
5 | ||
6 | #include <asm-generic/vmlinux.lds.h> | |
f0d5375e | 7 | #include <asm/cache.h> |
4f7a1812 | 8 | #include <asm/thread_info.h> |
37d07b72 | 9 | #include <asm/memory.h> |
f6430a93 | 10 | #include <asm/page.h> |
1da177e4 | 11 | |
5085f3ff | 12 | #define PROC_INFO \ |
b8b9987f | 13 | . = ALIGN(4); \ |
5085f3ff RK |
14 | VMLINUX_SYMBOL(__proc_info_begin) = .; \ |
15 | *(.proc.info.init) \ | |
16 | VMLINUX_SYMBOL(__proc_info_end) = .; | |
17 | ||
8903826d WD |
18 | #define IDMAP_TEXT \ |
19 | ALIGN_FUNCTION(); \ | |
20 | VMLINUX_SYMBOL(__idmap_text_start) = .; \ | |
21 | *(.idmap.text) \ | |
22 | VMLINUX_SYMBOL(__idmap_text_end) = .; | |
23 | ||
5085f3ff RK |
24 | #ifdef CONFIG_HOTPLUG_CPU |
25 | #define ARM_CPU_DISCARD(x) | |
26 | #define ARM_CPU_KEEP(x) x | |
27 | #else | |
28 | #define ARM_CPU_DISCARD(x) x | |
29 | #define ARM_CPU_KEEP(x) | |
30 | #endif | |
31 | ||
87e040b6 SG |
32 | #if (defined(CONFIG_SMP_ON_UP) && !defined(CONFIG_DEBUG_SPINLOCK)) || \ |
33 | defined(CONFIG_GENERIC_BUG) | |
a9ad21fe | 34 | #define ARM_EXIT_KEEP(x) x |
6760b109 | 35 | #define ARM_EXIT_DISCARD(x) |
a9ad21fe RK |
36 | #else |
37 | #define ARM_EXIT_KEEP(x) | |
6760b109 | 38 | #define ARM_EXIT_DISCARD(x) x |
a9ad21fe RK |
39 | #endif |
40 | ||
1da177e4 LT |
41 | OUTPUT_ARCH(arm) |
42 | ENTRY(stext) | |
37d07b72 | 43 | |
1da177e4 LT |
44 | #ifndef __ARMEB__ |
45 | jiffies = jiffies_64; | |
46 | #else | |
47 | jiffies = jiffies_64 + 4; | |
48 | #endif | |
37d07b72 | 49 | |
9d4f13e5 RK |
50 | SECTIONS |
51 | { | |
39df8887 | 52 | /* |
6760b109 RK |
53 | * XXX: The linker does not define how output sections are |
54 | * assigned to input sections when there are multiple statements | |
55 | * matching the same input section name. There is no documented | |
56 | * order of matching. | |
57 | * | |
39df8887 RK |
58 | * unwind exit sections must be discarded before the rest of the |
59 | * unwind sections get included. | |
60 | */ | |
61 | /DISCARD/ : { | |
62 | *(.ARM.exidx.exit.text) | |
63 | *(.ARM.extab.exit.text) | |
64 | ARM_CPU_DISCARD(*(.ARM.exidx.cpuexit.text)) | |
65 | ARM_CPU_DISCARD(*(.ARM.extab.cpuexit.text)) | |
6760b109 RK |
66 | ARM_EXIT_DISCARD(EXIT_TEXT) |
67 | ARM_EXIT_DISCARD(EXIT_DATA) | |
68 | EXIT_CALL | |
39df8887 RK |
69 | #ifndef CONFIG_HOTPLUG |
70 | *(.ARM.exidx.devexit.text) | |
71 | *(.ARM.extab.devexit.text) | |
72 | #endif | |
73 | #ifndef CONFIG_MMU | |
74 | *(.fixup) | |
75 | *(__ex_table) | |
76 | #endif | |
77 | #ifndef CONFIG_SMP_ON_UP | |
78 | *(.alt.smp.init) | |
79 | #endif | |
6760b109 RK |
80 | *(.discard) |
81 | *(.discard.*) | |
39df8887 RK |
82 | } |
83 | ||
37d07b72 | 84 | #ifdef CONFIG_XIP_KERNEL |
9d4f13e5 | 85 | . = XIP_VIRT_ADDR(CONFIG_XIP_PHYS_ADDR); |
37d07b72 | 86 | #else |
9d4f13e5 | 87 | . = PAGE_OFFSET + TEXT_OFFSET; |
37d07b72 | 88 | #endif |
1604d79d | 89 | .head.text : { |
e2f81844 | 90 | _text = .; |
1604d79d RK |
91 | HEAD_TEXT |
92 | } | |
3835d69a | 93 | .text : { /* Real text segment */ |
e2f81844 | 94 | _stext = .; /* Text and read-only data */ |
3835d69a RK |
95 | __exception_text_start = .; |
96 | *(.exception.text) | |
97 | __exception_text_end = .; | |
98 | IRQENTRY_TEXT | |
99 | TEXT_TEXT | |
100 | SCHED_TEXT | |
101 | LOCK_TEXT | |
102 | KPROBES_TEXT | |
8903826d | 103 | IDMAP_TEXT |
3835d69a RK |
104 | #ifdef CONFIG_MMU |
105 | *(.fixup) | |
106 | #endif | |
107 | *(.gnu.warning) | |
108 | *(.glue_7) | |
109 | *(.glue_7t) | |
110 | . = ALIGN(4); | |
111 | *(.got) /* Global offset table */ | |
112 | ARM_CPU_KEEP(PROC_INFO) | |
113 | } | |
114 | ||
115 | RO_DATA(PAGE_SIZE) | |
116 | ||
117 | #ifdef CONFIG_ARM_UNWIND | |
118 | /* | |
119 | * Stack unwinding tables | |
120 | */ | |
121 | . = ALIGN(8); | |
122 | .ARM.unwind_idx : { | |
123 | __start_unwind_idx = .; | |
124 | *(.ARM.exidx*) | |
125 | __stop_unwind_idx = .; | |
126 | } | |
127 | .ARM.unwind_tab : { | |
128 | __start_unwind_tab = .; | |
129 | *(.ARM.extab*) | |
130 | __stop_unwind_tab = .; | |
131 | } | |
132 | #endif | |
133 | ||
134 | _etext = .; /* End of text and rodata section */ | |
135 | ||
136 | #ifndef CONFIG_XIP_KERNEL | |
137 | . = ALIGN(PAGE_SIZE); | |
138 | __init_begin = .; | |
139 | #endif | |
140 | ||
1604d79d RK |
141 | INIT_TEXT_SECTION(8) |
142 | .exit.text : { | |
143 | ARM_EXIT_KEEP(EXIT_TEXT) | |
144 | } | |
145 | .init.proc.info : { | |
5085f3ff | 146 | ARM_CPU_DISCARD(PROC_INFO) |
1604d79d RK |
147 | } |
148 | .init.arch.info : { | |
1da177e4 | 149 | __arch_info_begin = .; |
1604d79d | 150 | *(.arch.info.init) |
1da177e4 | 151 | __arch_info_end = .; |
1604d79d RK |
152 | } |
153 | .init.tagtable : { | |
1da177e4 | 154 | __tagtable_begin = .; |
1604d79d | 155 | *(.taglist.init) |
1da177e4 | 156 | __tagtable_end = .; |
1604d79d | 157 | } |
f00ec48f | 158 | #ifdef CONFIG_SMP_ON_UP |
1604d79d | 159 | .init.smpalt : { |
f00ec48f | 160 | __smpalt_begin = .; |
1604d79d | 161 | *(.alt.smp.init) |
f00ec48f | 162 | __smpalt_end = .; |
1604d79d | 163 | } |
f00ec48f | 164 | #endif |
1604d79d | 165 | .init.pv_table : { |
dc21af99 | 166 | __pv_table_begin = .; |
1604d79d | 167 | *(.pv_table) |
dc21af99 | 168 | __pv_table_end = .; |
1604d79d RK |
169 | } |
170 | .init.data : { | |
171 | #ifndef CONFIG_XIP_KERNEL | |
172 | INIT_DATA | |
173 | #endif | |
78d7530a | 174 | INIT_SETUP(16) |
78d7530a NE |
175 | INIT_CALLS |
176 | CON_INITCALL | |
177 | SECURITY_INITCALL | |
178 | INIT_RAM_FS | |
1604d79d | 179 | } |
1da177e4 | 180 | #ifndef CONFIG_XIP_KERNEL |
1604d79d | 181 | .exit.data : { |
a9ad21fe | 182 | ARM_EXIT_KEEP(EXIT_DATA) |
1da177e4 | 183 | } |
1604d79d | 184 | #endif |
1da177e4 | 185 | |
9973290c | 186 | #ifdef CONFIG_SMP |
f0d5375e | 187 | PERCPU_SECTION(L1_CACHE_BYTES) |
9973290c | 188 | #endif |
78d7530a | 189 | |
1da177e4 LT |
190 | #ifdef CONFIG_XIP_KERNEL |
191 | __data_loc = ALIGN(4); /* location in binary */ | |
9d4f13e5 | 192 | . = PAGE_OFFSET + TEXT_OFFSET; |
1da177e4 | 193 | #else |
3835d69a | 194 | __init_end = .; |
4f7a1812 | 195 | . = ALIGN(THREAD_SIZE); |
1da177e4 LT |
196 | __data_loc = .; |
197 | #endif | |
198 | ||
199 | .data : AT(__data_loc) { | |
37efe642 | 200 | _data = .; /* address in memory */ |
8c7e6574 | 201 | _sdata = .; |
1da177e4 LT |
202 | |
203 | /* | |
204 | * first, the init task union, aligned | |
205 | * to an 8192 byte boundary. | |
206 | */ | |
78d7530a | 207 | INIT_TASK_DATA(THREAD_SIZE) |
1da177e4 LT |
208 | |
209 | #ifdef CONFIG_XIP_KERNEL | |
f6430a93 | 210 | . = ALIGN(PAGE_SIZE); |
1da177e4 | 211 | __init_begin = .; |
01ba2bdc | 212 | INIT_DATA |
a9ad21fe | 213 | ARM_EXIT_KEEP(EXIT_DATA) |
f6430a93 | 214 | . = ALIGN(PAGE_SIZE); |
1da177e4 LT |
215 | __init_end = .; |
216 | #endif | |
217 | ||
78d7530a | 218 | NOSAVE_DATA |
f0d5375e WD |
219 | CACHELINE_ALIGNED_DATA(L1_CACHE_BYTES) |
220 | READ_MOSTLY_DATA(L1_CACHE_BYTES) | |
1da177e4 | 221 | |
13b1f64c NP |
222 | /* |
223 | * The exception fixup table (might need resorting at runtime) | |
224 | */ | |
972da064 | 225 | . = ALIGN(4); |
13b1f64c | 226 | __start___ex_table = .; |
9641c7cc | 227 | #ifdef CONFIG_MMU |
13b1f64c | 228 | *(__ex_table) |
9641c7cc | 229 | #endif |
13b1f64c NP |
230 | __stop___ex_table = .; |
231 | ||
1da177e4 LT |
232 | /* |
233 | * and the usual data section | |
234 | */ | |
ca967258 | 235 | DATA_DATA |
1da177e4 LT |
236 | CONSTRUCTORS |
237 | ||
238 | _edata = .; | |
239 | } | |
e98ff7f6 | 240 | _edata_loc = __data_loc + SIZEOF(.data); |
1da177e4 | 241 | |
bc581770 LW |
242 | #ifdef CONFIG_HAVE_TCM |
243 | /* | |
244 | * We align everything to a page boundary so we can | |
245 | * free it after init has commenced and TCM contents have | |
246 | * been copied to its destination. | |
247 | */ | |
248 | .tcm_start : { | |
249 | . = ALIGN(PAGE_SIZE); | |
250 | __tcm_start = .; | |
251 | __itcm_start = .; | |
252 | } | |
253 | ||
254 | /* | |
255 | * Link these to the ITCM RAM | |
256 | * Put VMA to the TCM address and LMA to the common RAM | |
257 | * and we'll upload the contents from RAM to TCM and free | |
258 | * the used RAM after that. | |
259 | */ | |
260 | .text_itcm ITCM_OFFSET : AT(__itcm_start) | |
261 | { | |
262 | __sitcm_text = .; | |
263 | *(.tcm.text) | |
264 | *(.tcm.rodata) | |
265 | . = ALIGN(4); | |
266 | __eitcm_text = .; | |
267 | } | |
268 | ||
269 | /* | |
270 | * Reset the dot pointer, this is needed to create the | |
271 | * relative __dtcm_start below (to be used as extern in code). | |
272 | */ | |
273 | . = ADDR(.tcm_start) + SIZEOF(.tcm_start) + SIZEOF(.text_itcm); | |
274 | ||
275 | .dtcm_start : { | |
276 | __dtcm_start = .; | |
277 | } | |
278 | ||
279 | /* TODO: add remainder of ITCM as well, that can be used for data! */ | |
280 | .data_dtcm DTCM_OFFSET : AT(__dtcm_start) | |
281 | { | |
282 | . = ALIGN(4); | |
283 | __sdtcm_data = .; | |
284 | *(.tcm.data) | |
285 | . = ALIGN(4); | |
286 | __edtcm_data = .; | |
287 | } | |
288 | ||
289 | /* Reset the dot pointer or the linker gets confused */ | |
290 | . = ADDR(.dtcm_start) + SIZEOF(.data_dtcm); | |
291 | ||
292 | /* End marker for freeing TCM copy in linked object */ | |
293 | .tcm_end : AT(ADDR(.dtcm_start) + SIZEOF(.data_dtcm)){ | |
294 | . = ALIGN(PAGE_SIZE); | |
295 | __tcm_end = .; | |
296 | } | |
297 | #endif | |
298 | ||
dc810efb PM |
299 | NOTES |
300 | ||
78d7530a NE |
301 | BSS_SECTION(0, 0, 0) |
302 | _end = .; | |
303 | ||
304 | STABS_DEBUG | |
1da177e4 LT |
305 | .comment 0 : { *(.comment) } |
306 | } | |
307 | ||
728f5c07 RK |
308 | /* |
309 | * These must never be empty | |
310 | * If you have to comment these two assert statements out, your | |
311 | * binutils is too old (for other reasons as well) | |
312 | */ | |
1da177e4 LT |
313 | ASSERT((__proc_info_end - __proc_info_begin), "missing CPU support") |
314 | ASSERT((__arch_info_end - __arch_info_begin), "no machine record defined") |