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 /* No __ro_after_init data in the .rodata section - which will always be ro */
7 #define RO_AFTER_INIT_DATA
9 #include <asm-generic/vmlinux.lds.h>
10 #include <asm/cache.h>
11 #include <asm/thread_info.h>
12 #include <asm/memory.h>
17 VMLINUX_SYMBOL(__proc_info_begin) = .; \
19 VMLINUX_SYMBOL(__proc_info_end) = .;
23 VMLINUX_SYMBOL(__idmap_text_start) = .; \
25 VMLINUX_SYMBOL(__idmap_text_end) = .; \
26 . = ALIGN(PAGE_SIZE); \
27 VMLINUX_SYMBOL(__hyp_idmap_text_start) = .; \
29 VMLINUX_SYMBOL(__hyp_idmap_text_end) = .;
31 #ifdef CONFIG_HOTPLUG_CPU
32 #define ARM_CPU_DISCARD(x)
33 #define ARM_CPU_KEEP(x) x
35 #define ARM_CPU_DISCARD(x) x
36 #define ARM_CPU_KEEP(x)
39 #if (defined(CONFIG_SMP_ON_UP) && !defined(CONFIG_DEBUG_SPINLOCK)) || \
40 defined(CONFIG_GENERIC_BUG)
41 #define ARM_EXIT_KEEP(x) x
42 #define ARM_EXIT_DISCARD(x)
44 #define ARM_EXIT_KEEP(x)
45 #define ARM_EXIT_DISCARD(x) x
54 jiffies = jiffies_64 + 4;
60 * XXX: The linker does not define how output sections are
61 * assigned to input sections when there are multiple statements
62 * matching the same input section name. There is no documented
65 * unwind exit sections must be discarded before the rest of the
66 * unwind sections get included.
69 *(.ARM.exidx.exit.text)
70 *(.ARM.extab.exit.text)
71 ARM_CPU_DISCARD(*(.ARM.exidx.cpuexit.text))
72 ARM_CPU_DISCARD(*(.ARM.extab.cpuexit.text))
73 ARM_EXIT_DISCARD(EXIT_TEXT)
74 ARM_EXIT_DISCARD(EXIT_DATA)
80 #ifndef CONFIG_SMP_ON_UP
87 . = XIP_VIRT_ADDR(CONFIG_XIP_PHYS_ADDR);
88 _xiprom = .; /* XIP ROM area to be mapped */
95 .text : { /* Real text segment */
96 _stext = .; /* Text and read-only data */
98 __exception_text_start = .;
100 __exception_text_end = .;
111 *(.got) /* Global offset table */
112 ARM_CPU_KEEP(PROC_INFO)
118 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {
119 __start___ex_table = .;
123 __stop___ex_table = .;
126 #ifdef CONFIG_ARM_UNWIND
128 * Stack unwinding tables
132 __start_unwind_idx = .;
134 __stop_unwind_idx = .;
137 __start_unwind_tab = .;
139 __stop_unwind_tab = .;
145 _etext = .; /* End of text and rodata section */
148 * The vectors and stubs are relocatable code, and the
149 * only thing that matters is their relative offsets
152 .vectors 0xffff0000 : AT(__vectors_start) {
155 . = __vectors_start + SIZEOF(.vectors);
159 .stubs ADDR(.vectors) + 0x1000 : AT(__stubs_start) {
162 . = __stubs_start + SIZEOF(.stubs);
165 PROVIDE(vector_fiq_offset = vector_fiq - ADDR(.vectors));
169 ARM_EXIT_KEEP(EXIT_TEXT)
172 ARM_CPU_DISCARD(PROC_INFO)
175 __arch_info_begin = .;
180 __tagtable_begin = .;
184 #ifdef CONFIG_SMP_ON_UP
192 __pv_table_begin = .;
205 PERCPU_SECTION(L1_CACHE_BYTES)
208 _exiprom = .; /* End of XIP ROM area */
209 __data_loc = ALIGN(4); /* location in binary */
210 . = PAGE_OFFSET + TEXT_OFFSET;
212 .data : AT(__data_loc) {
213 _data = .; /* address in memory */
217 * first, the init task union, aligned
218 * to an 8192 byte boundary.
220 INIT_TASK_DATA(THREAD_SIZE)
222 . = ALIGN(PAGE_SIZE);
225 ARM_EXIT_KEEP(EXIT_DATA)
226 . = ALIGN(PAGE_SIZE);
229 *(.data..ro_after_init)
232 CACHELINE_ALIGNED_DATA(L1_CACHE_BYTES)
233 READ_MOSTLY_DATA(L1_CACHE_BYTES)
236 * and the usual data section
243 _edata_loc = __data_loc + SIZEOF(.data);
247 #ifdef CONFIG_HAVE_TCM
249 * We align everything to a page boundary so we can
250 * free it after init has commenced and TCM contents have
251 * been copied to its destination.
254 . = ALIGN(PAGE_SIZE);
260 * Link these to the ITCM RAM
261 * Put VMA to the TCM address and LMA to the common RAM
262 * and we'll upload the contents from RAM to TCM and free
263 * the used RAM after that.
265 .text_itcm ITCM_OFFSET : AT(__itcm_start)
275 * Reset the dot pointer, this is needed to create the
276 * relative __dtcm_start below (to be used as extern in code).
278 . = ADDR(.tcm_start) + SIZEOF(.tcm_start) + SIZEOF(.text_itcm);
284 /* TODO: add remainder of ITCM as well, that can be used for data! */
285 .data_dtcm DTCM_OFFSET : AT(__dtcm_start)
294 /* Reset the dot pointer or the linker gets confused */
295 . = ADDR(.dtcm_start) + SIZEOF(.data_dtcm);
297 /* End marker for freeing TCM copy in linked object */
298 .tcm_end : AT(ADDR(.dtcm_start) + SIZEOF(.data_dtcm)){
299 . = ALIGN(PAGE_SIZE);
311 * These must never be empty
312 * If you have to comment these two assert statements out, your
313 * binutils is too old (for other reasons as well)
315 ASSERT((__proc_info_end - __proc_info_begin), "missing CPU support")
316 ASSERT((__arch_info_end - __arch_info_begin), "no machine record defined")
319 * The HYP init code can't be more than a page long,
320 * and should not cross a page boundary.
321 * The above comment applies as well.
323 ASSERT(__hyp_idmap_text_end - (__hyp_idmap_text_start & PAGE_MASK) <= PAGE_SIZE,
324 "HYP init code too big or misaligned")