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 #ifdef CONFIG_XIP_KERNEL
7 #include "vmlinux-xip.lds.S"
10 #include <asm-generic/vmlinux.lds.h>
11 #include <asm/cache.h>
12 #include <asm/thread_info.h>
13 #include <asm/memory.h>
15 #include <asm/pgtable.h>
19 VMLINUX_SYMBOL(__proc_info_begin) = .; \
21 VMLINUX_SYMBOL(__proc_info_end) = .;
23 #define HYPERVISOR_TEXT \
24 VMLINUX_SYMBOL(__hyp_text_start) = .; \
26 VMLINUX_SYMBOL(__hyp_text_end) = .;
30 VMLINUX_SYMBOL(__idmap_text_start) = .; \
32 VMLINUX_SYMBOL(__idmap_text_end) = .; \
33 . = ALIGN(PAGE_SIZE); \
34 VMLINUX_SYMBOL(__hyp_idmap_text_start) = .; \
36 VMLINUX_SYMBOL(__hyp_idmap_text_end) = .;
38 #ifdef CONFIG_HOTPLUG_CPU
39 #define ARM_CPU_DISCARD(x)
40 #define ARM_CPU_KEEP(x) x
42 #define ARM_CPU_DISCARD(x) x
43 #define ARM_CPU_KEEP(x)
46 #if (defined(CONFIG_SMP_ON_UP) && !defined(CONFIG_DEBUG_SPINLOCK)) || \
47 defined(CONFIG_GENERIC_BUG)
48 #define ARM_EXIT_KEEP(x) x
49 #define ARM_EXIT_DISCARD(x)
51 #define ARM_EXIT_KEEP(x)
52 #define ARM_EXIT_DISCARD(x) x
61 jiffies = jiffies_64 + 4;
67 * XXX: The linker does not define how output sections are
68 * assigned to input sections when there are multiple statements
69 * matching the same input section name. There is no documented
72 * unwind exit sections must be discarded before the rest of the
73 * unwind sections get included.
76 *(.ARM.exidx.exit.text)
77 *(.ARM.extab.exit.text)
78 ARM_CPU_DISCARD(*(.ARM.exidx.cpuexit.text))
79 ARM_CPU_DISCARD(*(.ARM.extab.cpuexit.text))
80 ARM_EXIT_DISCARD(EXIT_TEXT)
81 ARM_EXIT_DISCARD(EXIT_DATA)
87 #ifndef CONFIG_SMP_ON_UP
94 . = PAGE_OFFSET + TEXT_OFFSET;
100 #ifdef CONFIG_DEBUG_RODATA
101 . = ALIGN(1<<SECTION_SHIFT);
104 .text : { /* Real text segment */
105 _stext = .; /* Text and read-only data */
107 __exception_text_start = .;
109 __exception_text_end = .;
120 *(.got) /* Global offset table */
121 ARM_CPU_KEEP(PROC_INFO)
124 #ifdef CONFIG_DEBUG_ALIGN_RODATA
125 . = ALIGN(1<<SECTION_SHIFT);
130 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {
131 __start___ex_table = .;
135 __stop___ex_table = .;
138 #ifdef CONFIG_ARM_UNWIND
140 * Stack unwinding tables
144 __start_unwind_idx = .;
146 __stop_unwind_idx = .;
149 __start_unwind_tab = .;
151 __stop_unwind_tab = .;
157 _etext = .; /* End of text and rodata section */
159 #ifdef CONFIG_DEBUG_RODATA
160 . = ALIGN(1<<SECTION_SHIFT);
162 . = ALIGN(PAGE_SIZE);
167 * The vectors and stubs are relocatable code, and the
168 * only thing that matters is their relative offsets
171 .vectors 0xffff0000 : AT(__vectors_start) {
174 . = __vectors_start + SIZEOF(.vectors);
178 .stubs ADDR(.vectors) + 0x1000 : AT(__stubs_start) {
181 . = __stubs_start + SIZEOF(.stubs);
184 PROVIDE(vector_fiq_offset = vector_fiq - ADDR(.vectors));
188 ARM_EXIT_KEEP(EXIT_TEXT)
191 ARM_CPU_DISCARD(PROC_INFO)
194 __arch_info_begin = .;
199 __tagtable_begin = .;
203 #ifdef CONFIG_SMP_ON_UP
211 __pv_table_begin = .;
224 ARM_EXIT_KEEP(EXIT_DATA)
228 PERCPU_SECTION(L1_CACHE_BYTES)
231 #ifdef CONFIG_DEBUG_RODATA
232 . = ALIGN(1<<SECTION_SHIFT);
234 . = ALIGN(THREAD_SIZE);
239 .data : AT(__data_loc) {
240 _data = .; /* address in memory */
244 * first, the init task union, aligned
245 * to an 8192 byte boundary.
247 INIT_TASK_DATA(THREAD_SIZE)
250 CACHELINE_ALIGNED_DATA(L1_CACHE_BYTES)
251 READ_MOSTLY_DATA(L1_CACHE_BYTES)
254 * and the usual data section
261 _edata_loc = __data_loc + SIZEOF(.data);
263 #ifdef CONFIG_HAVE_TCM
265 * We align everything to a page boundary so we can
266 * free it after init has commenced and TCM contents have
267 * been copied to its destination.
270 . = ALIGN(PAGE_SIZE);
276 * Link these to the ITCM RAM
277 * Put VMA to the TCM address and LMA to the common RAM
278 * and we'll upload the contents from RAM to TCM and free
279 * the used RAM after that.
281 .text_itcm ITCM_OFFSET : AT(__itcm_start)
291 * Reset the dot pointer, this is needed to create the
292 * relative __dtcm_start below (to be used as extern in code).
294 . = ADDR(.tcm_start) + SIZEOF(.tcm_start) + SIZEOF(.text_itcm);
300 /* TODO: add remainder of ITCM as well, that can be used for data! */
301 .data_dtcm DTCM_OFFSET : AT(__dtcm_start)
310 /* Reset the dot pointer or the linker gets confused */
311 . = ADDR(.dtcm_start) + SIZEOF(.data_dtcm);
313 /* End marker for freeing TCM copy in linked object */
314 .tcm_end : AT(ADDR(.dtcm_start) + SIZEOF(.data_dtcm)){
315 . = ALIGN(PAGE_SIZE);
326 #ifdef CONFIG_DEBUG_RODATA
328 * Without CONFIG_DEBUG_ALIGN_RODATA, __start_rodata_section_aligned will
329 * be the first section-aligned location after __start_rodata. Otherwise,
330 * it will be equal to __start_rodata.
332 __start_rodata_section_aligned = ALIGN(__start_rodata, 1 << SECTION_SHIFT);
336 * These must never be empty
337 * If you have to comment these two assert statements out, your
338 * binutils is too old (for other reasons as well)
340 ASSERT((__proc_info_end - __proc_info_begin), "missing CPU support")
341 ASSERT((__arch_info_end - __arch_info_begin), "no machine record defined")
344 * The HYP init code can't be more than a page long,
345 * and should not cross a page boundary.
346 * The above comment applies as well.
348 ASSERT(__hyp_idmap_text_end - (__hyp_idmap_text_start & PAGE_MASK) <= PAGE_SIZE,
349 "HYP init code too big or misaligned")
351 #endif /* CONFIG_XIP_KERNEL */