/* * ld script to make ARM Linux kernel * taken from the i386 version by Russell King * Written by Martin Mares <mj@atrey.karlin.mff.cuni.cz> */ #include <asm-generic/vmlinux.lds.h>#include <asm/cache.h>#include <asm/kernel-pgtable.h>#include <asm/thread_info.h>#include <asm/memory.h>#include <asm/page.h>#include <asm/pgtable.h> #include "image.h" /* .exit.text needed in case of alternative patching */#define ARM_EXIT_KEEP(x)	x#define ARM_EXIT_DISCARD(x) OUTPUT_ARCH(aarch64)ENTRY(_text) jiffies = jiffies_64; #define HYPERVISOR_TEXT					\	/*						\	 * Align to 4 KB so that			\	 * a) the HYP vector table is at its minimum	\	 *    alignment of 2048 bytes			\	 * b) the HYP init code will not cross a page	\	 *    boundary if its size does not exceed	\	 *    4 KB (see related ASSERT() below)		\	 */						\	. = ALIGN(SZ_4K);				\	VMLINUX_SYMBOL(__hyp_idmap_text_start) = .;	\	*(.hyp.idmap.text)				\	VMLINUX_SYMBOL(__hyp_idmap_text_end) = .;	\	VMLINUX_SYMBOL(__hyp_text_start) = .;		\	*(.hyp.text)					\	VMLINUX_SYMBOL(__hyp_text_end) = .; #define IDMAP_TEXT					\	. = ALIGN(SZ_4K);				\	VMLINUX_SYMBOL(__idmap_text_start) = .;		\	*(.idmap.text)					\	VMLINUX_SYMBOL(__idmap_text_end) = .; #ifdef CONFIG_HIBERNATION#define HIBERNATE_TEXT					\	. = ALIGN(SZ_4K);				\	VMLINUX_SYMBOL(__hibernate_exit_text_start) = .;\	*(.hibernate_exit.text)				\	VMLINUX_SYMBOL(__hibernate_exit_text_end) = .;#else#define HIBERNATE_TEXT#endif /* * The size of the PE/COFF section that covers the kernel image, which * runs from stext to _edata, must be a round multiple of the PE/COFF * FileAlignment, which we set to its minimum value of 0x200. 'stext' * itself is 4 KB aligned, so padding out _edata to a 0x200 aligned * boundary should be sufficient. */PECOFF_FILE_ALIGNMENT = 0x200; #ifdef CONFIG_EFI#define PECOFF_EDATA_PADDING	\	.pecoff_edata_padding : { BYTE(0); . = ALIGN(PECOFF_FILE_ALIGNMENT); }#else#define PECOFF_EDATA_PADDING#endif #if defined(CONFIG_DEBUG_ALIGN_RODATA)/* *  4 KB granule:   1 level 2 entry * 16 KB granule: 128 level 3 entries, with contiguous bit * 64 KB granule:  32 level 3 entries, with contiguous bit */#define SEGMENT_ALIGN			SZ_2M#else/* *  4 KB granule:  16 level 3 entries, with contiguous bit * 16 KB granule:   4 level 3 entries, without contiguous bit * 64 KB granule:   1 level 3 entry */#define SEGMENT_ALIGN			SZ_64K#endif SECTIONS{	/*	 * XXX: The linker does not define how output sections are	 * assigned to input sections when there are multiple statements	 * matching the same input section name.  There is no documented	 * order of matching.	 */	/DISCARD/ : {		ARM_EXIT_DISCARD(EXIT_TEXT)		ARM_EXIT_DISCARD(EXIT_DATA)		EXIT_CALL		*(.discard)		*(.discard.*)		*(.interp .dynamic)		*(.dynsym .dynstr .hash)	} 	. = KIMAGE_VADDR + TEXT_OFFSET; 	.head.text : {		_text = .;		HEAD_TEXT	}	.text : {			/* Real text segment		*/		_stext = .;		/* Text and read-only data	*/			__exception_text_start = .;			*(.exception.text)			__exception_text_end = .;			IRQENTRY_TEXT			SOFTIRQENTRY_TEXT			ENTRY_TEXT			TEXT_TEXT			SCHED_TEXT			CPUIDLE_TEXT			LOCK_TEXT			KPROBES_TEXT			HYPERVISOR_TEXT			IDMAP_TEXT			HIBERNATE_TEXT			*(.fixup)			*(.gnu.warning)		. = ALIGN(16);		*(.got)			/* Global offset table		*/	} 	. = ALIGN(SEGMENT_ALIGN);	_etext = .;			/* End of text section */ 	RO_DATA(PAGE_SIZE)		/* everything from this point to     */	EXCEPTION_TABLE(8)		/* __init_begin will be marked RO NX */	NOTES 	. = ALIGN(SEGMENT_ALIGN);	__init_begin = .;	__inittext_begin = .; 	INIT_TEXT_SECTION(8)	.exit.text : {		ARM_EXIT_KEEP(EXIT_TEXT)	} 	. = ALIGN(4);	.altinstructions : {		__alt_instructions = .;		*(.altinstructions)		__alt_instructions_end = .;	}	.altinstr_replacement : {		*(.altinstr_replacement)	} 	. = ALIGN(PAGE_SIZE);	__inittext_end = .;	__initdata_begin = .; 	.init.data : {		INIT_DATA		INIT_SETUP(16)		INIT_CALLS		CON_INITCALL		SECURITY_INITCALL		INIT_RAM_FS		*(.init.rodata.* .init.bss)	/* from the EFI stub */	}	.exit.data : {		ARM_EXIT_KEEP(EXIT_DATA)	} 	PERCPU_SECTION(L1_CACHE_BYTES) 	.rela : ALIGN(8) {		*(.rela .rela*)	} 	__rela_offset	= ABSOLUTE(ADDR(.rela) - KIMAGE_VADDR);	__rela_size	= SIZEOF(.rela); 	. = ALIGN(SEGMENT_ALIGN);	__initdata_end = .;	__init_end = .; 	_data = .;	_sdata = .;	RW_DATA_SECTION(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE) 	/*	 * Data written with the MMU off but read with the MMU on requires	 * cache lines to be invalidated, discarding up to a Cache Writeback	 * Granule (CWG) of data from the cache. Keep the section that	 * requires this type of maintenance to be in its own Cache Writeback	 * Granule (CWG) area so the cache maintenance operations don't	 * interfere with adjacent data.	 */	.mmuoff.data.write : ALIGN(SZ_2K) {		__mmuoff_data_start = .;		*(.mmuoff.data.write)	}	. = ALIGN(SZ_2K);	.mmuoff.data.read : {		*(.mmuoff.data.read)		__mmuoff_data_end = .;	} 	PECOFF_EDATA_PADDING	__pecoff_data_rawsize = ABSOLUTE(. - __initdata_begin);	_edata = .; 	BSS_SECTION(0, 0, 0) 	. = ALIGN(PAGE_SIZE);	idmap_pg_dir = .;	. += IDMAP_DIR_SIZE;	swapper_pg_dir = .;	. += SWAPPER_DIR_SIZE; #ifdef CONFIG_ARM64_SW_TTBR0_PAN	reserved_ttbr0 = .;	. += RESERVED_TTBR0_SIZE;#endif 	__pecoff_data_size = ABSOLUTE(. - __initdata_begin);	_end = .; 	STABS_DEBUG 	HEAD_SYMBOLS} /* * The HYP init code and ID map text can't be longer than a page each, * and should not cross a page boundary. */ASSERT(__hyp_idmap_text_end - (__hyp_idmap_text_start & ~(SZ_4K - 1)) <= SZ_4K,	"HYP init code too big or misaligned")ASSERT(__idmap_text_end - (__idmap_text_start & ~(SZ_4K - 1)) <= SZ_4K,	"ID map text too big or misaligned")#ifdef CONFIG_HIBERNATIONASSERT(__hibernate_exit_text_end - (__hibernate_exit_text_start & ~(SZ_4K - 1))	<= SZ_4K, "Hibernate exit text too big or misaligned")#endif /* * If padding is applied before .head.text, virt<->phys conversions will fail. */ASSERT(_text == (KIMAGE_VADDR + TEXT_OFFSET), "HEAD is misaligned")