1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* ld script to make ARM Linux kernel
3 * taken from the i386 version by Russell King
4 * Written by Martin Mares <mj@atrey.karlin.mff.cuni.cz>
7 /* No __ro_after_init data in the .rodata section - which will always be ro */
8 #define RO_AFTER_INIT_DATA
10 #include <asm-generic/vmlinux.lds.h>
11 #include <asm/cache.h>
12 #include <asm/thread_info.h>
13 #include <asm/memory.h>
18 VMLINUX_SYMBOL(__proc_info_begin) = .; \
20 VMLINUX_SYMBOL(__proc_info_end) = .;
24 VMLINUX_SYMBOL(__idmap_text_start) = .; \
26 VMLINUX_SYMBOL(__idmap_text_end) = .; \
27 . = ALIGN(PAGE_SIZE); \
28 VMLINUX_SYMBOL(__hyp_idmap_text_start) = .; \
30 VMLINUX_SYMBOL(__hyp_idmap_text_end) = .;
32 #ifdef CONFIG_HOTPLUG_CPU
33 #define ARM_CPU_DISCARD(x)
34 #define ARM_CPU_KEEP(x) x
36 #define ARM_CPU_DISCARD(x) x
37 #define ARM_CPU_KEEP(x)
40 #if (defined(CONFIG_SMP_ON_UP) && !defined(CONFIG_DEBUG_SPINLOCK)) || \
41 defined(CONFIG_GENERIC_BUG)
42 #define ARM_EXIT_KEEP(x) x
43 #define ARM_EXIT_DISCARD(x)
45 #define ARM_EXIT_KEEP(x)
46 #define ARM_EXIT_DISCARD(x) x
55 jiffies = jiffies_64 + 4;
61 * XXX: The linker does not define how output sections are
62 * assigned to input sections when there are multiple statements
63 * matching the same input section name. There is no documented
66 * unwind exit sections must be discarded before the rest of the
67 * unwind sections get included.
70 *(.ARM.exidx.exit.text)
71 *(.ARM.extab.exit.text)
72 ARM_CPU_DISCARD(*(.ARM.exidx.cpuexit.text))
73 ARM_CPU_DISCARD(*(.ARM.extab.cpuexit.text))
74 ARM_EXIT_DISCARD(EXIT_TEXT)
75 ARM_EXIT_DISCARD(EXIT_DATA)
81 #ifndef CONFIG_SMP_ON_UP
88 . = XIP_VIRT_ADDR(CONFIG_XIP_PHYS_ADDR);
89 _xiprom = .; /* XIP ROM area to be mapped */
96 .text : { /* Real text segment */
97 _stext = .; /* Text and read-only data */
99 __exception_text_start = .;
101 __exception_text_end = .;
112 *(.got) /* Global offset table */
113 ARM_CPU_KEEP(PROC_INFO)
119 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {
120 __start___ex_table = .;
124 __stop___ex_table = .;
127 #ifdef CONFIG_ARM_UNWIND
129 * Stack unwinding tables
133 __start_unwind_idx = .;
135 __stop_unwind_idx = .;
138 __start_unwind_tab = .;
140 __stop_unwind_tab = .;
146 _etext = .; /* End of text and rodata section */
149 * The vectors and stubs are relocatable code, and the
150 * only thing that matters is their relative offsets
153 .vectors 0xffff0000 : AT(__vectors_start) {
156 . = __vectors_start + SIZEOF(.vectors);
160 .stubs ADDR(.vectors) + 0x1000 : AT(__stubs_start) {
163 . = __stubs_start + SIZEOF(.stubs);
166 PROVIDE(vector_fiq_offset = vector_fiq - ADDR(.vectors));
170 ARM_EXIT_KEEP(EXIT_TEXT)
173 ARM_CPU_DISCARD(PROC_INFO)
176 __arch_info_begin = .;
181 __tagtable_begin = .;
185 #ifdef CONFIG_SMP_ON_UP
193 __pv_table_begin = .;
206 PERCPU_SECTION(L1_CACHE_BYTES)
209 _exiprom = .; /* End of XIP ROM area */
210 __data_loc = ALIGN(4); /* location in binary */
211 . = PAGE_OFFSET + TEXT_OFFSET;
213 .data : AT(__data_loc) {
214 _data = .; /* address in memory */
218 * first, the init task union, aligned
219 * to an 8192 byte boundary.
221 INIT_TASK_DATA(THREAD_SIZE)
223 . = ALIGN(PAGE_SIZE);
226 ARM_EXIT_KEEP(EXIT_DATA)
227 . = ALIGN(PAGE_SIZE);
230 *(.data..ro_after_init)
233 CACHELINE_ALIGNED_DATA(L1_CACHE_BYTES)
234 READ_MOSTLY_DATA(L1_CACHE_BYTES)
237 * and the usual data section
244 _edata_loc = __data_loc + SIZEOF(.data);
248 #ifdef CONFIG_HAVE_TCM
250 * We align everything to a page boundary so we can
251 * free it after init has commenced and TCM contents have
252 * been copied to its destination.
255 . = ALIGN(PAGE_SIZE);
261 * Link these to the ITCM RAM
262 * Put VMA to the TCM address and LMA to the common RAM
263 * and we'll upload the contents from RAM to TCM and free
264 * the used RAM after that.
266 .text_itcm ITCM_OFFSET : AT(__itcm_start)
276 * Reset the dot pointer, this is needed to create the
277 * relative __dtcm_start below (to be used as extern in code).
279 . = ADDR(.tcm_start) + SIZEOF(.tcm_start) + SIZEOF(.text_itcm);
285 /* TODO: add remainder of ITCM as well, that can be used for data! */
286 .data_dtcm DTCM_OFFSET : AT(__dtcm_start)
295 /* Reset the dot pointer or the linker gets confused */
296 . = ADDR(.dtcm_start) + SIZEOF(.data_dtcm);
298 /* End marker for freeing TCM copy in linked object */
299 .tcm_end : AT(ADDR(.dtcm_start) + SIZEOF(.data_dtcm)){
300 . = ALIGN(PAGE_SIZE);
312 * These must never be empty
313 * If you have to comment these two assert statements out, your
314 * binutils is too old (for other reasons as well)
316 ASSERT((__proc_info_end - __proc_info_begin), "missing CPU support")
317 ASSERT((__arch_info_end - __arch_info_begin), "no machine record defined")
320 * The HYP init code can't be more than a page long,
321 * and should not cross a page boundary.
322 * The above comment applies as well.
324 ASSERT(__hyp_idmap_text_end - (__hyp_idmap_text_start & PAGE_MASK) <= PAGE_SIZE,
325 "HYP init code too big or misaligned")