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>
6 #include <asm-generic/vmlinux.lds.h>
8 #include <asm/thread_info.h>
9 #include <asm/memory.h>
14 VMLINUX_SYMBOL(__proc_info_begin) = .; \
16 VMLINUX_SYMBOL(__proc_info_end) = .;
20 VMLINUX_SYMBOL(__idmap_text_start) = .; \
22 VMLINUX_SYMBOL(__idmap_text_end) = .; \
23 . = ALIGN(PAGE_SIZE); \
24 VMLINUX_SYMBOL(__hyp_idmap_text_start) = .; \
26 VMLINUX_SYMBOL(__hyp_idmap_text_end) = .;
28 #ifdef CONFIG_HOTPLUG_CPU
29 #define ARM_CPU_DISCARD(x)
30 #define ARM_CPU_KEEP(x) x
32 #define ARM_CPU_DISCARD(x) x
33 #define ARM_CPU_KEEP(x)
36 #if (defined(CONFIG_SMP_ON_UP) && !defined(CONFIG_DEBUG_SPINLOCK)) || \
37 defined(CONFIG_GENERIC_BUG)
38 #define ARM_EXIT_KEEP(x) x
39 #define ARM_EXIT_DISCARD(x)
41 #define ARM_EXIT_KEEP(x)
42 #define ARM_EXIT_DISCARD(x) x
51 jiffies = jiffies_64 + 4;
57 * XXX: The linker does not define how output sections are
58 * assigned to input sections when there are multiple statements
59 * matching the same input section name. There is no documented
62 * unwind exit sections must be discarded before the rest of the
63 * unwind sections get included.
66 *(.ARM.exidx.exit.text)
67 *(.ARM.extab.exit.text)
68 ARM_CPU_DISCARD(*(.ARM.exidx.cpuexit.text))
69 ARM_CPU_DISCARD(*(.ARM.extab.cpuexit.text))
70 ARM_EXIT_DISCARD(EXIT_TEXT)
71 ARM_EXIT_DISCARD(EXIT_DATA)
77 #ifndef CONFIG_SMP_ON_UP
84 . = XIP_VIRT_ADDR(CONFIG_XIP_PHYS_ADDR);
85 _xiprom = .; /* XIP ROM area to be mapped */
92 .text : { /* Real text segment */
93 _stext = .; /* Text and read-only data */
95 __exception_text_start = .;
97 __exception_text_end = .;
108 *(.got) /* Global offset table */
109 ARM_CPU_KEEP(PROC_INFO)
115 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {
116 __start___ex_table = .;
120 __stop___ex_table = .;
123 #ifdef CONFIG_ARM_UNWIND
125 * Stack unwinding tables
129 __start_unwind_idx = .;
131 __stop_unwind_idx = .;
134 __start_unwind_tab = .;
136 __stop_unwind_tab = .;
142 _etext = .; /* End of text and rodata section */
145 * The vectors and stubs are relocatable code, and the
146 * only thing that matters is their relative offsets
149 .vectors 0xffff0000 : AT(__vectors_start) {
152 . = __vectors_start + SIZEOF(.vectors);
156 .stubs ADDR(.vectors) + 0x1000 : AT(__stubs_start) {
159 . = __stubs_start + SIZEOF(.stubs);
162 PROVIDE(vector_fiq_offset = vector_fiq - ADDR(.vectors));
166 ARM_EXIT_KEEP(EXIT_TEXT)
169 ARM_CPU_DISCARD(PROC_INFO)
172 __arch_info_begin = .;
177 __tagtable_begin = .;
181 #ifdef CONFIG_SMP_ON_UP
189 __pv_table_begin = .;
202 PERCPU_SECTION(L1_CACHE_BYTES)
205 _exiprom = .; /* End of XIP ROM area */
206 __data_loc = ALIGN(4); /* location in binary */
207 . = PAGE_OFFSET + TEXT_OFFSET;
209 .data : AT(__data_loc) {
210 _data = .; /* address in memory */
214 * first, the init task union, aligned
215 * to an 8192 byte boundary.
217 INIT_TASK_DATA(THREAD_SIZE)
219 . = ALIGN(PAGE_SIZE);
222 ARM_EXIT_KEEP(EXIT_DATA)
223 . = ALIGN(PAGE_SIZE);
227 CACHELINE_ALIGNED_DATA(L1_CACHE_BYTES)
228 READ_MOSTLY_DATA(L1_CACHE_BYTES)
231 * and the usual data section
238 _edata_loc = __data_loc + SIZEOF(.data);
240 #ifdef CONFIG_HAVE_TCM
242 * We align everything to a page boundary so we can
243 * free it after init has commenced and TCM contents have
244 * been copied to its destination.
247 . = ALIGN(PAGE_SIZE);
253 * Link these to the ITCM RAM
254 * Put VMA to the TCM address and LMA to the common RAM
255 * and we'll upload the contents from RAM to TCM and free
256 * the used RAM after that.
258 .text_itcm ITCM_OFFSET : AT(__itcm_start)
268 * Reset the dot pointer, this is needed to create the
269 * relative __dtcm_start below (to be used as extern in code).
271 . = ADDR(.tcm_start) + SIZEOF(.tcm_start) + SIZEOF(.text_itcm);
277 /* TODO: add remainder of ITCM as well, that can be used for data! */
278 .data_dtcm DTCM_OFFSET : AT(__dtcm_start)
287 /* Reset the dot pointer or the linker gets confused */
288 . = ADDR(.dtcm_start) + SIZEOF(.data_dtcm);
290 /* End marker for freeing TCM copy in linked object */
291 .tcm_end : AT(ADDR(.dtcm_start) + SIZEOF(.data_dtcm)){
292 . = ALIGN(PAGE_SIZE);
304 * These must never be empty
305 * If you have to comment these two assert statements out, your
306 * binutils is too old (for other reasons as well)
308 ASSERT((__proc_info_end - __proc_info_begin), "missing CPU support")
309 ASSERT((__arch_info_end - __arch_info_begin), "no machine record defined")
312 * The HYP init code can't be more than a page long,
313 * and should not cross a page boundary.
314 * The above comment applies as well.
316 ASSERT(__hyp_idmap_text_end - (__hyp_idmap_text_start & PAGE_MASK) <= PAGE_SIZE,
317 "HYP init code too big or misaligned")