/* SPDX-License-Identifier: GPL-2.0 *//* * 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/hyp_image.h>#ifdef CONFIG_KVM#define HYPERVISOR_EXTABLE					\	. = ALIGN(SZ_8);					\	__start___kvm_ex_table = .;				\	*(__kvm_ex_table)					\	__stop___kvm_ex_table = .; #define HYPERVISOR_DATA_SECTIONS				\	HYP_SECTION_NAME(.rodata) : {				\		. = ALIGN(PAGE_SIZE);				\		__hyp_rodata_start = .;				\		*(HYP_SECTION_NAME(.data..ro_after_init))	\		*(HYP_SECTION_NAME(.rodata))			\		. = ALIGN(PAGE_SIZE);				\		__hyp_rodata_end = .;				\	} #define HYPERVISOR_PERCPU_SECTION				\	. = ALIGN(PAGE_SIZE);					\	HYP_SECTION_NAME(.data..percpu) : {			\		*(HYP_SECTION_NAME(.data..percpu))		\	} #define HYPERVISOR_RELOC_SECTION				\	.hyp.reloc : ALIGN(4) {					\		__hyp_reloc_begin = .;				\		*(.hyp.reloc)					\		__hyp_reloc_end = .;				\	} #define BSS_FIRST_SECTIONS					\	__hyp_bss_start = .;					\	*(HYP_SECTION_NAME(.bss))				\	. = ALIGN(PAGE_SIZE);					\	__hyp_bss_end = .; /* * We require that __hyp_bss_start and __bss_start are aligned, and enforce it * with an assertion. But the BSS_SECTION macro places an empty .sbss section * between them, which can in some cases cause the linker to misalign them. To * work around the issue, force a page alignment for __bss_start. */#define SBSS_ALIGN			PAGE_SIZE#else /* CONFIG_KVM */#define HYPERVISOR_EXTABLE#define HYPERVISOR_DATA_SECTIONS#define HYPERVISOR_PERCPU_SECTION#define HYPERVISOR_RELOC_SECTION#define SBSS_ALIGN			0#endif #define RO_EXCEPTION_TABLE_ALIGN	8#define RUNTIME_DISCARD_EXIT #include <asm-generic/vmlinux.lds.h>#include <asm/cache.h>#include <asm/kernel-pgtable.h>#include <asm/memory.h>#include <asm/page.h> #include "image.h" OUTPUT_ARCH(aarch64)ENTRY(_text) jiffies = jiffies_64; #define HYPERVISOR_TEXT					\	. = ALIGN(PAGE_SIZE);				\	__hyp_idmap_text_start = .;			\	*(.hyp.idmap.text)				\	__hyp_idmap_text_end = .;			\	__hyp_text_start = .;				\	*(.hyp.text)					\	HYPERVISOR_EXTABLE				\	. = ALIGN(PAGE_SIZE);				\	__hyp_text_end = .; #define IDMAP_TEXT					\	. = ALIGN(SZ_4K);				\	__idmap_text_start = .;				\	*(.idmap.text)					\	__idmap_text_end = .; #ifdef CONFIG_HIBERNATION#define HIBERNATE_TEXT					\	. = ALIGN(SZ_4K);				\	__hibernate_exit_text_start = .;		\	*(.hibernate_exit.text)				\	__hibernate_exit_text_end = .;#else#define HIBERNATE_TEXT#endif #ifdef CONFIG_UNMAP_KERNEL_AT_EL0#define TRAMP_TEXT					\	. = ALIGN(PAGE_SIZE);				\	__entry_tramp_text_start = .;			\	*(.entry.tramp.text)				\	. = ALIGN(PAGE_SIZE);				\	__entry_tramp_text_end = .;#else#define TRAMP_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 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.	 */	DISCARDS	/DISCARD/ : {		*(.interp .dynamic)		*(.dynsym .dynstr .hash .gnu.hash)	} 	. = KIMAGE_VADDR; 	.head.text : {		_text = .;		HEAD_TEXT	}	.text : ALIGN(SEGMENT_ALIGN) {	/* Real text segment		*/		_stext = .;		/* Text and read-only data	*/			IRQENTRY_TEXT			SOFTIRQENTRY_TEXT			ENTRY_TEXT			TEXT_TEXT			SCHED_TEXT			CPUIDLE_TEXT			LOCK_TEXT			KPROBES_TEXT			HYPERVISOR_TEXT			IDMAP_TEXT			HIBERNATE_TEXT			TRAMP_TEXT			*(.fixup)			*(.gnu.warning)		. = ALIGN(16);		*(.got)			/* Global offset table		*/	} 	/*	 * Make sure that the .got.plt is either completely empty or it	 * contains only the lazy dispatch entries.	 */	.got.plt : { *(.got.plt) }	ASSERT(SIZEOF(.got.plt) == 0 || SIZEOF(.got.plt) == 0x18,	       "Unexpected GOT/PLT entries detected!") 	. = ALIGN(SEGMENT_ALIGN);	_etext = .;			/* End of text section */ 	/* everything from this point to __init_begin will be marked RO NX */	RO_DATA(PAGE_SIZE) 	idmap_pg_dir = .;	. += IDMAP_DIR_SIZE;	idmap_pg_end = .; #ifdef CONFIG_UNMAP_KERNEL_AT_EL0	tramp_pg_dir = .;	. += PAGE_SIZE;#endif 	reserved_pg_dir = .;	. += PAGE_SIZE; 	swapper_pg_dir = .;	. += PAGE_SIZE; 	. = ALIGN(SEGMENT_ALIGN);	__init_begin = .;	__inittext_begin = .; 	INIT_TEXT_SECTION(8) 	__exittext_begin = .;	.exit.text : {		EXIT_TEXT	}	__exittext_end = .; 	. = ALIGN(4);	.altinstructions : {		__alt_instructions = .;		*(.altinstructions)		__alt_instructions_end = .;	} 	. = ALIGN(SEGMENT_ALIGN);	__inittext_end = .;	__initdata_begin = .; 	.init.data : {		INIT_DATA		INIT_SETUP(16)		INIT_CALLS		CON_INITCALL		INIT_RAM_FS		*(.init.altinstructions .init.bss)	/* from the EFI stub */	}	.exit.data : {		EXIT_DATA	} 	PERCPU_SECTION(L1_CACHE_BYTES)	HYPERVISOR_PERCPU_SECTION 	HYPERVISOR_RELOC_SECTION 	.rela.dyn : ALIGN(8) {		*(.rela .rela*)	} 	__rela_offset	= ABSOLUTE(ADDR(.rela.dyn) - KIMAGE_VADDR);	__rela_size	= SIZEOF(.rela.dyn); #ifdef CONFIG_RELR	.relr.dyn : ALIGN(8) {		*(.relr.dyn)	} 	__relr_offset	= ABSOLUTE(ADDR(.relr.dyn) - KIMAGE_VADDR);	__relr_size	= SIZEOF(.relr.dyn);#endif 	. = ALIGN(SEGMENT_ALIGN);	__initdata_end = .;	__init_end = .; 	_data = .;	_sdata = .;	RW_DATA(L1_CACHE_BYTES, PAGE_SIZE, THREAD_ALIGN) 	HYPERVISOR_DATA_SECTIONS 	/*	 * 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(SBSS_ALIGN, 0, 0) 	. = ALIGN(PAGE_SIZE);	init_pg_dir = .;	. += INIT_DIR_SIZE;	init_pg_end = .; 	. = ALIGN(SEGMENT_ALIGN);	__pecoff_data_size = ABSOLUTE(. - __initdata_begin);	_end = .; 	STABS_DEBUG	DWARF_DEBUG	ELF_DETAILS 	HEAD_SYMBOLS 	/*	 * Sections that should stay zero sized, which is safer to	 * explicitly check instead of blindly discarding.	 */	.plt : {		*(.plt) *(.plt.*) *(.iplt) *(.igot .igot.plt)	}	ASSERT(SIZEOF(.plt) == 0, "Unexpected run-time procedure linkages detected!") 	.data.rel.ro : { *(.data.rel.ro) }	ASSERT(SIZEOF(.data.rel.ro) == 0, "Unexpected RELRO detected!")} #include "image-vars.h" /* * The HYP init code and ID map text can't be longer than a page each. The * former is page-aligned, but the latter may not be with 16K or 64K pages, so * it should also not cross a page boundary. */ASSERT(__hyp_idmap_text_end - __hyp_idmap_text_start <= PAGE_SIZE,	"HYP init code too big")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#ifdef CONFIG_UNMAP_KERNEL_AT_EL0ASSERT((__entry_tramp_text_end - __entry_tramp_text_start) == PAGE_SIZE,	"Entry trampoline text too big")#endif#ifdef CONFIG_KVMASSERT(__hyp_bss_start == __bss_start, "HYP and Host BSS are misaligned")#endif/* * If padding is applied before .head.text, virt<->phys conversions will fail. */ASSERT(_text == KIMAGE_VADDR, "HEAD is misaligned") ASSERT(swapper_pg_dir - reserved_pg_dir == RESERVED_SWAPPER_OFFSET,       "RESERVED_SWAPPER_OFFSET is wrong!") #ifdef CONFIG_UNMAP_KERNEL_AT_EL0ASSERT(swapper_pg_dir - tramp_pg_dir == TRAMP_SWAPPER_OFFSET,       "TRAMP_SWAPPER_OFFSET is wrong!")#endif