/* * Helper macros to support writing architecture specific * linker scripts. * * A minimal linker scripts has following content: * [This is a sample, architectures may have special requiriements] * * OUTPUT_FORMAT(...) * OUTPUT_ARCH(...) * ENTRY(...) * SECTIONS * { *	. = START; *	__init_begin = .; *	HEAD_TEXT_SECTION *	INIT_TEXT_SECTION(PAGE_SIZE) *	INIT_DATA_SECTION(...) *	PERCPU(PAGE_SIZE) *	__init_end = .; * *	_stext = .; *	TEXT_SECTION = 0 *	_etext = .; * *      _sdata = .; *	RO_DATA_SECTION(PAGE_SIZE) *	RW_DATA_SECTION(...) *	_edata = .; * *	EXCEPTION_TABLE(...) *	NOTES * *	BSS_SECTION(0, 0, 0) *	_end = .; * *	STABS_DEBUG *	DWARF_DEBUG * *	DISCARDS		// must be the last * } * * [__init_begin, __init_end] is the init section that may be freed after init * [_stext, _etext] is the text section * [_sdata, _edata] is the data section * * Some of the included output section have their own set of constants. * Examples are: [__initramfs_start, __initramfs_end] for initramfs and *               [__nosave_begin, __nosave_end] for the nosave data */ #ifndef LOAD_OFFSET#define LOAD_OFFSET 0#endif #ifndef VMLINUX_SYMBOL#define VMLINUX_SYMBOL(_sym_) _sym_#endif /* Align . to a 8 byte boundary equals to maximum function alignment. */#define ALIGN_FUNCTION()  . = ALIGN(8) /* The actual configuration determine if the init/exit sections * are handled as text/data or they can be discarded (which * often happens at runtime) */#ifdef CONFIG_HOTPLUG#define DEV_KEEP(sec)    *(.dev##sec)#define DEV_DISCARD(sec)#else#define DEV_KEEP(sec)#define DEV_DISCARD(sec) *(.dev##sec)#endif #ifdef CONFIG_HOTPLUG_CPU#define CPU_KEEP(sec)    *(.cpu##sec)#define CPU_DISCARD(sec)#else#define CPU_KEEP(sec)#define CPU_DISCARD(sec) *(.cpu##sec)#endif #if defined(CONFIG_MEMORY_HOTPLUG)#define MEM_KEEP(sec)    *(.mem##sec)#define MEM_DISCARD(sec)#else#define MEM_KEEP(sec)#define MEM_DISCARD(sec) *(.mem##sec)#endif #ifdef CONFIG_FTRACE_MCOUNT_RECORD#define MCOUNT_REC()	. = ALIGN(8);				\			VMLINUX_SYMBOL(__start_mcount_loc) = .; \			*(__mcount_loc)				\			VMLINUX_SYMBOL(__stop_mcount_loc) = .;#else#define MCOUNT_REC()#endif #ifdef CONFIG_TRACE_BRANCH_PROFILING#define LIKELY_PROFILE()	VMLINUX_SYMBOL(__start_annotated_branch_profile) = .; \				*(_ftrace_annotated_branch)			      \				VMLINUX_SYMBOL(__stop_annotated_branch_profile) = .;#else#define LIKELY_PROFILE()#endif #ifdef CONFIG_PROFILE_ALL_BRANCHES#define BRANCH_PROFILE()	VMLINUX_SYMBOL(__start_branch_profile) = .;   \				*(_ftrace_branch)			      \				VMLINUX_SYMBOL(__stop_branch_profile) = .;#else#define BRANCH_PROFILE()#endif #ifdef CONFIG_EVENT_TRACING#define FTRACE_EVENTS()	VMLINUX_SYMBOL(__start_ftrace_events) = .;	\			*(_ftrace_events)				\			VMLINUX_SYMBOL(__stop_ftrace_events) = .;#else#define FTRACE_EVENTS()#endif #ifdef CONFIG_TRACING#define TRACE_PRINTKS() VMLINUX_SYMBOL(__start___trace_bprintk_fmt) = .;      \			 *(__trace_printk_fmt) /* Trace_printk fmt' pointer */ \			 VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .;#else#define TRACE_PRINTKS()#endif #ifdef CONFIG_FTRACE_SYSCALLS#define TRACE_SYSCALLS() VMLINUX_SYMBOL(__start_syscalls_metadata) = .;	\			 *(__syscalls_metadata)				\			 VMLINUX_SYMBOL(__stop_syscalls_metadata) = .;#else#define TRACE_SYSCALLS()#endif /* .data section */#define DATA_DATA							\	*(.data)							\	*(.ref.data)							\	DEV_KEEP(init.data)						\	DEV_KEEP(exit.data)						\	CPU_KEEP(init.data)						\	CPU_KEEP(exit.data)						\	MEM_KEEP(init.data)						\	MEM_KEEP(exit.data)						\	. = ALIGN(8);							\	VMLINUX_SYMBOL(__start___markers) = .;				\	*(__markers)							\	VMLINUX_SYMBOL(__stop___markers) = .;				\	. = ALIGN(32);							\	VMLINUX_SYMBOL(__start___tracepoints) = .;			\	*(__tracepoints)						\	VMLINUX_SYMBOL(__stop___tracepoints) = .;			\	/* implement dynamic printk debug */				\	. = ALIGN(8);							\	VMLINUX_SYMBOL(__start___verbose) = .;                          \	*(__verbose)                                                    \	VMLINUX_SYMBOL(__stop___verbose) = .;				\	LIKELY_PROFILE()		       				\	BRANCH_PROFILE()						\	TRACE_PRINTKS()							\	FTRACE_EVENTS()							\	TRACE_SYSCALLS() /* * Data section helpers */#define NOSAVE_DATA							\	. = ALIGN(PAGE_SIZE);						\	VMLINUX_SYMBOL(__nosave_begin) = .;				\	*(.data.nosave)							\	. = ALIGN(PAGE_SIZE);						\	VMLINUX_SYMBOL(__nosave_end) = .; #define PAGE_ALIGNED_DATA(page_align)					\	. = ALIGN(page_align);						\	*(.data.page_aligned) #define READ_MOSTLY_DATA(align)						\	. = ALIGN(align);						\	*(.data.read_mostly) #define CACHELINE_ALIGNED_DATA(align)					\	. = ALIGN(align);						\	*(.data.cacheline_aligned) #define INIT_TASK_DATA(align)						\	. = ALIGN(align);						\	*(.data.init_task) /* * Read only Data */#define RO_DATA_SECTION(align)						\	. = ALIGN((align));						\	.rodata           : AT(ADDR(.rodata) - LOAD_OFFSET) {		\		VMLINUX_SYMBOL(__start_rodata) = .;			\		*(.rodata) *(.rodata.*)					\		*(__vermagic)		/* Kernel version magic */	\		*(__markers_strings)	/* Markers: strings */		\		*(__tracepoints_strings)/* Tracepoints: strings */	\	}								\									\	.rodata1          : AT(ADDR(.rodata1) - LOAD_OFFSET) {		\		*(.rodata1)						\	}								\									\	BUG_TABLE							\									\	/* PCI quirks */						\	.pci_fixup        : AT(ADDR(.pci_fixup) - LOAD_OFFSET) {	\		VMLINUX_SYMBOL(__start_pci_fixups_early) = .;		\		*(.pci_fixup_early)					\		VMLINUX_SYMBOL(__end_pci_fixups_early) = .;		\		VMLINUX_SYMBOL(__start_pci_fixups_header) = .;		\		*(.pci_fixup_header)					\		VMLINUX_SYMBOL(__end_pci_fixups_header) = .;		\		VMLINUX_SYMBOL(__start_pci_fixups_final) = .;		\		*(.pci_fixup_final)					\		VMLINUX_SYMBOL(__end_pci_fixups_final) = .;		\		VMLINUX_SYMBOL(__start_pci_fixups_enable) = .;		\		*(.pci_fixup_enable)					\		VMLINUX_SYMBOL(__end_pci_fixups_enable) = .;		\		VMLINUX_SYMBOL(__start_pci_fixups_resume) = .;		\		*(.pci_fixup_resume)					\		VMLINUX_SYMBOL(__end_pci_fixups_resume) = .;		\		VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .;	\		*(.pci_fixup_resume_early)				\		VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .;	\		VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .;		\		*(.pci_fixup_suspend)					\		VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .;		\	}								\									\	/* Built-in firmware blobs */					\	.builtin_fw        : AT(ADDR(.builtin_fw) - LOAD_OFFSET) {	\		VMLINUX_SYMBOL(__start_builtin_fw) = .;			\		*(.builtin_fw)						\		VMLINUX_SYMBOL(__end_builtin_fw) = .;			\	}								\									\	/* RapidIO route ops */						\	.rio_route        : AT(ADDR(.rio_route) - LOAD_OFFSET) {	\		VMLINUX_SYMBOL(__start_rio_route_ops) = .;		\		*(.rio_route_ops)					\		VMLINUX_SYMBOL(__end_rio_route_ops) = .;		\	}								\									\	TRACEDATA							\									\	/* Kernel symbol table: Normal symbols */			\	__ksymtab         : AT(ADDR(__ksymtab) - LOAD_OFFSET) {		\		VMLINUX_SYMBOL(__start___ksymtab) = .;			\		*(__ksymtab)						\		VMLINUX_SYMBOL(__stop___ksymtab) = .;			\	}								\									\	/* Kernel symbol table: GPL-only symbols */			\	__ksymtab_gpl     : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) {	\		VMLINUX_SYMBOL(__start___ksymtab_gpl) = .;		\		*(__ksymtab_gpl)					\		VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .;		\	}								\									\	/* Kernel symbol table: Normal unused symbols */		\	__ksymtab_unused  : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) {	\		VMLINUX_SYMBOL(__start___ksymtab_unused) = .;		\		*(__ksymtab_unused)					\		VMLINUX_SYMBOL(__stop___ksymtab_unused) = .;		\	}								\									\	/* Kernel symbol table: GPL-only unused symbols */		\	__ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \		VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .;	\		*(__ksymtab_unused_gpl)					\		VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .;	\	}								\									\	/* Kernel symbol table: GPL-future-only symbols */		\	__ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \		VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .;	\		*(__ksymtab_gpl_future)					\		VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .;	\	}								\									\	/* Kernel symbol table: Normal symbols */			\	__kcrctab         : AT(ADDR(__kcrctab) - LOAD_OFFSET) {		\		VMLINUX_SYMBOL(__start___kcrctab) = .;			\		*(__kcrctab)						\		VMLINUX_SYMBOL(__stop___kcrctab) = .;			\	}								\									\	/* Kernel symbol table: GPL-only symbols */			\	__kcrctab_gpl     : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) {	\		VMLINUX_SYMBOL(__start___kcrctab_gpl) = .;		\		*(__kcrctab_gpl)					\		VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .;		\	}								\									\	/* Kernel symbol table: Normal unused symbols */		\	__kcrctab_unused  : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) {	\		VMLINUX_SYMBOL(__start___kcrctab_unused) = .;		\		*(__kcrctab_unused)					\		VMLINUX_SYMBOL(__stop___kcrctab_unused) = .;		\	}								\									\	/* Kernel symbol table: GPL-only unused symbols */		\	__kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \		VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .;	\		*(__kcrctab_unused_gpl)					\		VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .;	\	}								\									\	/* Kernel symbol table: GPL-future-only symbols */		\	__kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \		VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .;	\		*(__kcrctab_gpl_future)					\		VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .;	\	}								\									\	/* Kernel symbol table: strings */				\        __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) {	\		*(__ksymtab_strings)					\	}								\									\	/* __*init sections */						\	__init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) {		\		*(.ref.rodata)						\		DEV_KEEP(init.rodata)					\		DEV_KEEP(exit.rodata)					\		CPU_KEEP(init.rodata)					\		CPU_KEEP(exit.rodata)					\		MEM_KEEP(init.rodata)					\		MEM_KEEP(exit.rodata)					\	}								\									\	/* Built-in module parameters. */				\	__param : AT(ADDR(__param) - LOAD_OFFSET) {			\		VMLINUX_SYMBOL(__start___param) = .;			\		*(__param)						\		VMLINUX_SYMBOL(__stop___param) = .;			\		. = ALIGN((align));					\		VMLINUX_SYMBOL(__end_rodata) = .;			\	}								\	. = ALIGN((align)); /* RODATA & RO_DATA provided for backward compatibility. * All archs are supposed to use RO_DATA() */#define RODATA          RO_DATA_SECTION(4096)#define RO_DATA(align)  RO_DATA_SECTION(align) #define SECURITY_INIT							\	.security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \		VMLINUX_SYMBOL(__security_initcall_start) = .;		\		*(.security_initcall.init) 				\		VMLINUX_SYMBOL(__security_initcall_end) = .;		\	} /* .text section. Map to function alignment to avoid address changes * during second ld run in second ld pass when generating System.map */#define TEXT_TEXT							\		ALIGN_FUNCTION();					\		*(.text.hot)						\		*(.text)						\		*(.ref.text)						\	DEV_KEEP(init.text)						\	DEV_KEEP(exit.text)						\	CPU_KEEP(init.text)						\	CPU_KEEP(exit.text)						\	MEM_KEEP(init.text)						\	MEM_KEEP(exit.text)						\		*(.text.unlikely)  /* sched.text is aling to function alignment to secure we have same * address even at second ld pass when generating System.map */#define SCHED_TEXT							\		ALIGN_FUNCTION();					\		VMLINUX_SYMBOL(__sched_text_start) = .;			\		*(.sched.text)						\		VMLINUX_SYMBOL(__sched_text_end) = .; /* spinlock.text is aling to function alignment to secure we have same * address even at second ld pass when generating System.map */#define LOCK_TEXT							\		ALIGN_FUNCTION();					\		VMLINUX_SYMBOL(__lock_text_start) = .;			\		*(.spinlock.text)					\		VMLINUX_SYMBOL(__lock_text_end) = .; #define KPROBES_TEXT							\		ALIGN_FUNCTION();					\		VMLINUX_SYMBOL(__kprobes_text_start) = .;		\		*(.kprobes.text)					\		VMLINUX_SYMBOL(__kprobes_text_end) = .; #ifdef CONFIG_FUNCTION_GRAPH_TRACER#define IRQENTRY_TEXT							\		ALIGN_FUNCTION();					\		VMLINUX_SYMBOL(__irqentry_text_start) = .;		\		*(.irqentry.text)					\		VMLINUX_SYMBOL(__irqentry_text_end) = .;#else#define IRQENTRY_TEXT#endif /* Section used for early init (in .S files) */#define HEAD_TEXT  *(.head.text) #define HEAD_TEXT_SECTION							\	.head.text : AT(ADDR(.head.text) - LOAD_OFFSET) {		\		HEAD_TEXT						\	} /* * Exception table */#define EXCEPTION_TABLE(align)						\	. = ALIGN(align);						\	__ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {		\		VMLINUX_SYMBOL(__start___ex_table) = .;			\		*(__ex_table)						\		VMLINUX_SYMBOL(__stop___ex_table) = .;			\	} /* * Init task */#define INIT_TASK_DATA_SECTION(align)					\	. = ALIGN(align);						\	.data.init_task : {						\		INIT_TASK_DATA(align)					\	} #ifdef CONFIG_CONSTRUCTORS#define KERNEL_CTORS()	. = ALIGN(8);			   \			VMLINUX_SYMBOL(__ctors_start) = .; \			*(.ctors)			   \			VMLINUX_SYMBOL(__ctors_end) = .;#else#define KERNEL_CTORS()#endif /* init and exit section handling */#define INIT_DATA							\	*(.init.data)							\	DEV_DISCARD(init.data)						\	CPU_DISCARD(init.data)						\	MEM_DISCARD(init.data)						\	KERNEL_CTORS()							\	*(.init.rodata)							\	MCOUNT_REC()							\	DEV_DISCARD(init.rodata)					\	CPU_DISCARD(init.rodata)					\	MEM_DISCARD(init.rodata) #define INIT_TEXT							\	*(.init.text)							\	DEV_DISCARD(init.text)						\	CPU_DISCARD(init.text)						\	MEM_DISCARD(init.text) #define EXIT_DATA							\	*(.exit.data)							\	DEV_DISCARD(exit.data)						\	DEV_DISCARD(exit.rodata)					\	CPU_DISCARD(exit.data)						\	CPU_DISCARD(exit.rodata)					\	MEM_DISCARD(exit.data)						\	MEM_DISCARD(exit.rodata) #define EXIT_TEXT							\	*(.exit.text)							\	DEV_DISCARD(exit.text)						\	CPU_DISCARD(exit.text)						\	MEM_DISCARD(exit.text) #define EXIT_CALL							\	*(.exitcall.exit) /* * bss (Block Started by Symbol) - uninitialized data * zeroed during startup */#define SBSS(sbss_align)						\	. = ALIGN(sbss_align);						\	.sbss : AT(ADDR(.sbss) - LOAD_OFFSET) {				\		*(.sbss)						\		*(.scommon)						\	} #define BSS(bss_align)							\	. = ALIGN(bss_align);						\	.bss : AT(ADDR(.bss) - LOAD_OFFSET) {				\		*(.bss.page_aligned)					\		*(.dynbss)						\		*(.bss)							\

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