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) = .; \
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)
73 #ifndef CONFIG_HOTPLUG
74 *(.ARM.exidx.devexit.text)
75 *(.ARM.extab.devexit.text)
81 #ifndef CONFIG_SMP_ON_UP
88 #ifdef CONFIG_XIP_KERNEL
89 . = XIP_VIRT_ADDR(CONFIG_XIP_PHYS_ADDR);
91 . = PAGE_OFFSET + TEXT_OFFSET;
97 .text : { /* Real text segment */
98 _stext = .; /* Text and read-only data */
99 __exception_text_start = .;
101 __exception_text_end = .;
115 *(.got) /* Global offset table */
116 ARM_CPU_KEEP(PROC_INFO)
122 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {
123 __start___ex_table = .;
127 __stop___ex_table = .;
130 #ifdef CONFIG_ARM_UNWIND
132 * Stack unwinding tables
136 __start_unwind_idx = .;
138 __stop_unwind_idx = .;
141 __start_unwind_tab = .;
143 __stop_unwind_tab = .;
149 _etext = .; /* End of text and rodata section */
151 #ifndef CONFIG_XIP_KERNEL
152 . = ALIGN(PAGE_SIZE);
156 * The vectors and stubs are relocatable code, and the
157 * only thing that matters is their relative offsets
160 .vectors 0 : AT(__vectors_start) {
163 . = __vectors_start + SIZEOF(.vectors);
167 .stubs 0x1000 : AT(__stubs_start) {
170 . = __stubs_start + SIZEOF(.stubs);
175 ARM_EXIT_KEEP(EXIT_TEXT)
178 ARM_CPU_DISCARD(PROC_INFO)
181 __arch_info_begin = .;
186 __tagtable_begin = .;
190 #ifdef CONFIG_SMP_ON_UP
198 __pv_table_begin = .;
203 #ifndef CONFIG_XIP_KERNEL
212 #ifndef CONFIG_XIP_KERNEL
214 ARM_EXIT_KEEP(EXIT_DATA)
219 PERCPU_SECTION(L1_CACHE_BYTES)
222 #ifdef CONFIG_XIP_KERNEL
223 __data_loc = ALIGN(4); /* location in binary */
224 . = PAGE_OFFSET + TEXT_OFFSET;
227 . = ALIGN(THREAD_SIZE);
231 .data : AT(__data_loc) {
232 _data = .; /* address in memory */
236 * first, the init task union, aligned
237 * to an 8192 byte boundary.
239 INIT_TASK_DATA(THREAD_SIZE)
241 #ifdef CONFIG_XIP_KERNEL
242 . = ALIGN(PAGE_SIZE);
245 ARM_EXIT_KEEP(EXIT_DATA)
246 . = ALIGN(PAGE_SIZE);
251 CACHELINE_ALIGNED_DATA(L1_CACHE_BYTES)
252 READ_MOSTLY_DATA(L1_CACHE_BYTES)
255 * and the usual data section
262 _edata_loc = __data_loc + SIZEOF(.data);
264 #ifdef CONFIG_HAVE_TCM
266 * We align everything to a page boundary so we can
267 * free it after init has commenced and TCM contents have
268 * been copied to its destination.
271 . = ALIGN(PAGE_SIZE);
277 * Link these to the ITCM RAM
278 * Put VMA to the TCM address and LMA to the common RAM
279 * and we'll upload the contents from RAM to TCM and free
280 * the used RAM after that.
282 .text_itcm ITCM_OFFSET : AT(__itcm_start)
292 * Reset the dot pointer, this is needed to create the
293 * relative __dtcm_start below (to be used as extern in code).
295 . = ADDR(.tcm_start) + SIZEOF(.tcm_start) + SIZEOF(.text_itcm);
301 /* TODO: add remainder of ITCM as well, that can be used for data! */
302 .data_dtcm DTCM_OFFSET : AT(__dtcm_start)
311 /* Reset the dot pointer or the linker gets confused */
312 . = ADDR(.dtcm_start) + SIZEOF(.data_dtcm);
314 /* End marker for freeing TCM copy in linked object */
315 .tcm_end : AT(ADDR(.dtcm_start) + SIZEOF(.data_dtcm)){
316 . = ALIGN(PAGE_SIZE);
325 .comment 0 : { *(.comment) }
329 * These must never be empty
330 * If you have to comment these two assert statements out, your
331 * binutils is too old (for other reasons as well)
333 ASSERT((__proc_info_end - __proc_info_begin), "missing CPU support")
334 ASSERT((__arch_info_end - __arch_info_begin), "no machine record defined")
336 * The HYP init code can't be more than a page long.
337 * The above comment applies as well.
339 ASSERT(((__hyp_idmap_text_end - __hyp_idmap_text_start) <= PAGE_SIZE), "HYP init code too big")