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 #ifdef CONFIG_XIP_KERNEL
8 #include "vmlinux-xip.lds.S"
11 #include <asm-generic/vmlinux.lds.h>
12 #include <asm/cache.h>
13 #include <asm/thread_info.h>
14 #include <asm/memory.h>
16 #include <asm/pgtable.h>
20 VMLINUX_SYMBOL(__proc_info_begin) = .; \
22 VMLINUX_SYMBOL(__proc_info_end) = .;
24 #define HYPERVISOR_TEXT \
25 VMLINUX_SYMBOL(__hyp_text_start) = .; \
27 VMLINUX_SYMBOL(__hyp_text_end) = .;
31 VMLINUX_SYMBOL(__idmap_text_start) = .; \
33 VMLINUX_SYMBOL(__idmap_text_end) = .; \
34 . = ALIGN(PAGE_SIZE); \
35 VMLINUX_SYMBOL(__hyp_idmap_text_start) = .; \
37 VMLINUX_SYMBOL(__hyp_idmap_text_end) = .;
39 #ifdef CONFIG_HOTPLUG_CPU
40 #define ARM_CPU_DISCARD(x)
41 #define ARM_CPU_KEEP(x) x
43 #define ARM_CPU_DISCARD(x) x
44 #define ARM_CPU_KEEP(x)
47 #if (defined(CONFIG_SMP_ON_UP) && !defined(CONFIG_DEBUG_SPINLOCK)) || \
48 defined(CONFIG_GENERIC_BUG) || defined(CONFIG_JUMP_LABEL)
49 #define ARM_EXIT_KEEP(x) x
50 #define ARM_EXIT_DISCARD(x)
52 #define ARM_EXIT_KEEP(x)
53 #define ARM_EXIT_DISCARD(x) x
62 jiffies = jiffies_64 + 4;
68 * XXX: The linker does not define how output sections are
69 * assigned to input sections when there are multiple statements
70 * matching the same input section name. There is no documented
73 * unwind exit sections must be discarded before the rest of the
74 * unwind sections get included.
77 *(.ARM.exidx.exit.text)
78 *(.ARM.extab.exit.text)
79 ARM_CPU_DISCARD(*(.ARM.exidx.cpuexit.text))
80 ARM_CPU_DISCARD(*(.ARM.extab.cpuexit.text))
81 ARM_EXIT_DISCARD(EXIT_TEXT)
82 ARM_EXIT_DISCARD(EXIT_DATA)
88 #ifndef CONFIG_SMP_ON_UP
95 . = PAGE_OFFSET + TEXT_OFFSET;
101 #ifdef CONFIG_STRICT_KERNEL_RWX
102 . = ALIGN(1<<SECTION_SHIFT);
105 .text : { /* Real text segment */
106 _stext = .; /* Text and read-only data */
108 __exception_text_start = .;
110 __exception_text_end = .;
123 *(.got) /* Global offset table */
124 ARM_CPU_KEEP(PROC_INFO)
127 #ifdef CONFIG_DEBUG_ALIGN_RODATA
128 . = ALIGN(1<<SECTION_SHIFT);
130 _etext = .; /* End of text section */
135 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {
136 __start___ex_table = .;
140 __stop___ex_table = .;
143 #ifdef CONFIG_ARM_UNWIND
145 * Stack unwinding tables
149 __start_unwind_idx = .;
151 __stop_unwind_idx = .;
154 __start_unwind_tab = .;
156 __stop_unwind_tab = .;
162 #ifdef CONFIG_STRICT_KERNEL_RWX
163 . = ALIGN(1<<SECTION_SHIFT);
165 . = ALIGN(PAGE_SIZE);
170 * The vectors and stubs are relocatable code, and the
171 * only thing that matters is their relative offsets
174 .vectors 0xffff0000 : AT(__vectors_start) {
177 . = __vectors_start + SIZEOF(.vectors);
181 .stubs ADDR(.vectors) + 0x1000 : AT(__stubs_start) {
184 . = __stubs_start + SIZEOF(.stubs);
187 PROVIDE(vector_fiq_offset = vector_fiq - ADDR(.vectors));
191 ARM_EXIT_KEEP(EXIT_TEXT)
194 ARM_CPU_DISCARD(PROC_INFO)
197 __arch_info_begin = .;
202 __tagtable_begin = .;
206 #ifdef CONFIG_SMP_ON_UP
214 __pv_table_begin = .;
227 ARM_EXIT_KEEP(EXIT_DATA)
231 PERCPU_SECTION(L1_CACHE_BYTES)
234 #ifdef CONFIG_STRICT_KERNEL_RWX
235 . = ALIGN(1<<SECTION_SHIFT);
237 . = ALIGN(THREAD_SIZE);
242 .data : AT(__data_loc) {
243 _data = .; /* address in memory */
247 * first, the init task union, aligned
248 * to an 8192 byte boundary.
250 INIT_TASK_DATA(THREAD_SIZE)
253 CACHELINE_ALIGNED_DATA(L1_CACHE_BYTES)
254 READ_MOSTLY_DATA(L1_CACHE_BYTES)
257 * and the usual data section
264 _edata_loc = __data_loc + SIZEOF(.data);
268 #ifdef CONFIG_HAVE_TCM
270 * We align everything to a page boundary so we can
271 * free it after init has commenced and TCM contents have
272 * been copied to its destination.
275 . = ALIGN(PAGE_SIZE);
281 * Link these to the ITCM RAM
282 * Put VMA to the TCM address and LMA to the common RAM
283 * and we'll upload the contents from RAM to TCM and free
284 * the used RAM after that.
286 .text_itcm ITCM_OFFSET : AT(__itcm_start)
296 * Reset the dot pointer, this is needed to create the
297 * relative __dtcm_start below (to be used as extern in code).
299 . = ADDR(.tcm_start) + SIZEOF(.tcm_start) + SIZEOF(.text_itcm);
305 /* TODO: add remainder of ITCM as well, that can be used for data! */
306 .data_dtcm DTCM_OFFSET : AT(__dtcm_start)
315 /* Reset the dot pointer or the linker gets confused */
316 . = ADDR(.dtcm_start) + SIZEOF(.data_dtcm);
318 /* End marker for freeing TCM copy in linked object */
319 .tcm_end : AT(ADDR(.dtcm_start) + SIZEOF(.data_dtcm)){
320 . = ALIGN(PAGE_SIZE);
331 #ifdef CONFIG_STRICT_KERNEL_RWX
333 * Without CONFIG_DEBUG_ALIGN_RODATA, __start_rodata_section_aligned will
334 * be the first section-aligned location after __start_rodata. Otherwise,
335 * it will be equal to __start_rodata.
337 __start_rodata_section_aligned = ALIGN(__start_rodata, 1 << SECTION_SHIFT);
341 * These must never be empty
342 * If you have to comment these two assert statements out, your
343 * binutils is too old (for other reasons as well)
345 ASSERT((__proc_info_end - __proc_info_begin), "missing CPU support")
346 ASSERT((__arch_info_end - __arch_info_begin), "no machine record defined")
349 * The HYP init code can't be more than a page long,
350 * and should not cross a page boundary.
351 * The above comment applies as well.
353 ASSERT(__hyp_idmap_text_end - (__hyp_idmap_text_start & PAGE_MASK) <= PAGE_SIZE,
354 "HYP init code too big or misaligned")
356 #endif /* CONFIG_XIP_KERNEL */