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 #ifdef CONFIG_HOTPLUG_CPU
25 #define ARM_CPU_DISCARD(x)
26 #define ARM_CPU_KEEP(x) x
28 #define ARM_CPU_DISCARD(x) x
29 #define ARM_CPU_KEEP(x)
32 #if (defined(CONFIG_SMP_ON_UP) && !defined(CONFIG_DEBUG_SPINLOCK)) || \
33 defined(CONFIG_GENERIC_BUG)
34 #define ARM_EXIT_KEEP(x) x
35 #define ARM_EXIT_DISCARD(x)
37 #define ARM_EXIT_KEEP(x)
38 #define ARM_EXIT_DISCARD(x) x
47 jiffies = jiffies_64 + 4;
53 * XXX: The linker does not define how output sections are
54 * assigned to input sections when there are multiple statements
55 * matching the same input section name. There is no documented
58 * unwind exit sections must be discarded before the rest of the
59 * unwind sections get included.
62 *(.ARM.exidx.exit.text)
63 *(.ARM.extab.exit.text)
64 ARM_CPU_DISCARD(*(.ARM.exidx.cpuexit.text))
65 ARM_CPU_DISCARD(*(.ARM.extab.cpuexit.text))
66 ARM_EXIT_DISCARD(EXIT_TEXT)
67 ARM_EXIT_DISCARD(EXIT_DATA)
69 #ifndef CONFIG_HOTPLUG
70 *(.ARM.exidx.devexit.text)
71 *(.ARM.extab.devexit.text)
77 #ifndef CONFIG_SMP_ON_UP
84 #ifdef CONFIG_XIP_KERNEL
85 . = XIP_VIRT_ADDR(CONFIG_XIP_PHYS_ADDR);
87 . = PAGE_OFFSET + TEXT_OFFSET;
93 .text : { /* Real text segment */
94 _stext = .; /* Text and read-only data */
95 __exception_text_start = .;
97 __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 = .;
143 _etext = .; /* End of text and rodata section */
145 #ifndef CONFIG_XIP_KERNEL
146 . = ALIGN(PAGE_SIZE);
152 ARM_EXIT_KEEP(EXIT_TEXT)
155 ARM_CPU_DISCARD(PROC_INFO)
158 __arch_info_begin = .;
163 __tagtable_begin = .;
167 #ifdef CONFIG_SMP_ON_UP
175 __pv_table_begin = .;
180 #ifndef CONFIG_XIP_KERNEL
189 #ifndef CONFIG_XIP_KERNEL
191 ARM_EXIT_KEEP(EXIT_DATA)
196 PERCPU_SECTION(L1_CACHE_BYTES)
199 #ifdef CONFIG_XIP_KERNEL
200 __data_loc = ALIGN(4); /* location in binary */
201 . = PAGE_OFFSET + TEXT_OFFSET;
204 . = ALIGN(THREAD_SIZE);
208 .data : AT(__data_loc) {
209 _data = .; /* address in memory */
213 * first, the init task union, aligned
214 * to an 8192 byte boundary.
216 INIT_TASK_DATA(THREAD_SIZE)
218 #ifdef CONFIG_XIP_KERNEL
219 . = ALIGN(PAGE_SIZE);
222 ARM_EXIT_KEEP(EXIT_DATA)
223 . = ALIGN(PAGE_SIZE);
228 CACHELINE_ALIGNED_DATA(L1_CACHE_BYTES)
229 READ_MOSTLY_DATA(L1_CACHE_BYTES)
232 * and the usual data section
239 _edata_loc = __data_loc + SIZEOF(.data);
241 #ifdef CONFIG_HAVE_TCM
243 * We align everything to a page boundary so we can
244 * free it after init has commenced and TCM contents have
245 * been copied to its destination.
248 . = ALIGN(PAGE_SIZE);
254 * Link these to the ITCM RAM
255 * Put VMA to the TCM address and LMA to the common RAM
256 * and we'll upload the contents from RAM to TCM and free
257 * the used RAM after that.
259 .text_itcm ITCM_OFFSET : AT(__itcm_start)
269 * Reset the dot pointer, this is needed to create the
270 * relative __dtcm_start below (to be used as extern in code).
272 . = ADDR(.tcm_start) + SIZEOF(.tcm_start) + SIZEOF(.text_itcm);
278 /* TODO: add remainder of ITCM as well, that can be used for data! */
279 .data_dtcm DTCM_OFFSET : AT(__dtcm_start)
288 /* Reset the dot pointer or the linker gets confused */
289 . = ADDR(.dtcm_start) + SIZEOF(.data_dtcm);
291 /* End marker for freeing TCM copy in linked object */
292 .tcm_end : AT(ADDR(.dtcm_start) + SIZEOF(.data_dtcm)){
293 . = ALIGN(PAGE_SIZE);
304 .comment 0 : { *(.comment) }
308 * These must never be empty
309 * If you have to comment these two assert statements out, your
310 * binutils is too old (for other reasons as well)
312 ASSERT((__proc_info_end - __proc_info_begin), "missing CPU support")
313 ASSERT((__arch_info_end - __arch_info_begin), "no machine record defined")