forked from Minki/linux
c87728ca82
Follow-on MIPS patch will put an object here that needs 64K alignment to minimize padding. For those architectures that don't define BSS_FIRST_SECTIONS, there is no change. Signed-off-by: David Daney <david.daney@cavium.com> Cc: linux-mips@linux-mips.org Cc: linux-arch@vger.kernel.org, Cc: linux-kernel@vger.kernel.org Acked-by: Arnd Bergmann <arnd@arndb.de> Patchwork: https://patchwork.linux-mips.org/patch/4221/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
815 lines
24 KiB
C
815 lines
24 KiB
C
/*
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* Helper macros to support writing architecture specific
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* linker scripts.
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*
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* A minimal linker scripts has following content:
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* [This is a sample, architectures may have special requiriements]
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*
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* OUTPUT_FORMAT(...)
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* OUTPUT_ARCH(...)
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* ENTRY(...)
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* SECTIONS
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* {
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* . = START;
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* __init_begin = .;
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* HEAD_TEXT_SECTION
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* INIT_TEXT_SECTION(PAGE_SIZE)
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* INIT_DATA_SECTION(...)
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* PERCPU_SECTION(CACHELINE_SIZE)
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* __init_end = .;
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*
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* _stext = .;
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* TEXT_SECTION = 0
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* _etext = .;
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*
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* _sdata = .;
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* RO_DATA_SECTION(PAGE_SIZE)
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* RW_DATA_SECTION(...)
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* _edata = .;
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*
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* EXCEPTION_TABLE(...)
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* NOTES
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*
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* BSS_SECTION(0, 0, 0)
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* _end = .;
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*
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* STABS_DEBUG
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* DWARF_DEBUG
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*
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* DISCARDS // must be the last
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* }
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*
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* [__init_begin, __init_end] is the init section that may be freed after init
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* [_stext, _etext] is the text section
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* [_sdata, _edata] is the data section
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*
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* Some of the included output section have their own set of constants.
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* Examples are: [__initramfs_start, __initramfs_end] for initramfs and
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* [__nosave_begin, __nosave_end] for the nosave data
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*/
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#ifndef LOAD_OFFSET
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#define LOAD_OFFSET 0
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#endif
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#ifndef SYMBOL_PREFIX
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#define VMLINUX_SYMBOL(sym) sym
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#else
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#define PASTE2(x,y) x##y
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#define PASTE(x,y) PASTE2(x,y)
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#define VMLINUX_SYMBOL(sym) PASTE(SYMBOL_PREFIX, sym)
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#endif
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/* Align . to a 8 byte boundary equals to maximum function alignment. */
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#define ALIGN_FUNCTION() . = ALIGN(8)
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/*
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* Align to a 32 byte boundary equal to the
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* alignment gcc 4.5 uses for a struct
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*/
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#define STRUCT_ALIGNMENT 32
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#define STRUCT_ALIGN() . = ALIGN(STRUCT_ALIGNMENT)
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/* The actual configuration determine if the init/exit sections
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* are handled as text/data or they can be discarded (which
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* often happens at runtime)
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*/
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#ifdef CONFIG_HOTPLUG
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#define DEV_KEEP(sec) *(.dev##sec)
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#define DEV_DISCARD(sec)
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#else
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#define DEV_KEEP(sec)
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#define DEV_DISCARD(sec) *(.dev##sec)
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#endif
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#ifdef CONFIG_HOTPLUG_CPU
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#define CPU_KEEP(sec) *(.cpu##sec)
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#define CPU_DISCARD(sec)
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#else
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#define CPU_KEEP(sec)
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#define CPU_DISCARD(sec) *(.cpu##sec)
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#endif
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#if defined(CONFIG_MEMORY_HOTPLUG)
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#define MEM_KEEP(sec) *(.mem##sec)
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#define MEM_DISCARD(sec)
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#else
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#define MEM_KEEP(sec)
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#define MEM_DISCARD(sec) *(.mem##sec)
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#endif
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#ifdef CONFIG_FTRACE_MCOUNT_RECORD
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#define MCOUNT_REC() . = ALIGN(8); \
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VMLINUX_SYMBOL(__start_mcount_loc) = .; \
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*(__mcount_loc) \
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VMLINUX_SYMBOL(__stop_mcount_loc) = .;
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#else
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#define MCOUNT_REC()
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#endif
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#ifdef CONFIG_TRACE_BRANCH_PROFILING
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#define LIKELY_PROFILE() VMLINUX_SYMBOL(__start_annotated_branch_profile) = .; \
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*(_ftrace_annotated_branch) \
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VMLINUX_SYMBOL(__stop_annotated_branch_profile) = .;
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#else
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#define LIKELY_PROFILE()
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#endif
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#ifdef CONFIG_PROFILE_ALL_BRANCHES
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#define BRANCH_PROFILE() VMLINUX_SYMBOL(__start_branch_profile) = .; \
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*(_ftrace_branch) \
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VMLINUX_SYMBOL(__stop_branch_profile) = .;
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#else
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#define BRANCH_PROFILE()
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#endif
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#ifdef CONFIG_EVENT_TRACING
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#define FTRACE_EVENTS() . = ALIGN(8); \
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VMLINUX_SYMBOL(__start_ftrace_events) = .; \
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*(_ftrace_events) \
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VMLINUX_SYMBOL(__stop_ftrace_events) = .;
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#else
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#define FTRACE_EVENTS()
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#endif
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#ifdef CONFIG_TRACING
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#define TRACE_PRINTKS() VMLINUX_SYMBOL(__start___trace_bprintk_fmt) = .; \
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*(__trace_printk_fmt) /* Trace_printk fmt' pointer */ \
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VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .;
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#else
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#define TRACE_PRINTKS()
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#endif
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#ifdef CONFIG_FTRACE_SYSCALLS
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#define TRACE_SYSCALLS() . = ALIGN(8); \
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VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \
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*(__syscalls_metadata) \
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VMLINUX_SYMBOL(__stop_syscalls_metadata) = .;
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#else
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#define TRACE_SYSCALLS()
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#endif
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#define KERNEL_DTB() \
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STRUCT_ALIGN(); \
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VMLINUX_SYMBOL(__dtb_start) = .; \
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*(.dtb.init.rodata) \
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VMLINUX_SYMBOL(__dtb_end) = .;
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/* .data section */
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#define DATA_DATA \
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*(.data) \
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*(.ref.data) \
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*(.data..shared_aligned) /* percpu related */ \
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DEV_KEEP(init.data) \
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DEV_KEEP(exit.data) \
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CPU_KEEP(init.data) \
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CPU_KEEP(exit.data) \
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MEM_KEEP(init.data) \
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MEM_KEEP(exit.data) \
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*(.data.unlikely) \
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STRUCT_ALIGN(); \
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*(__tracepoints) \
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/* implement dynamic printk debug */ \
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. = ALIGN(8); \
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VMLINUX_SYMBOL(__start___jump_table) = .; \
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*(__jump_table) \
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VMLINUX_SYMBOL(__stop___jump_table) = .; \
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. = ALIGN(8); \
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VMLINUX_SYMBOL(__start___verbose) = .; \
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*(__verbose) \
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VMLINUX_SYMBOL(__stop___verbose) = .; \
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LIKELY_PROFILE() \
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BRANCH_PROFILE() \
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TRACE_PRINTKS()
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/*
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* Data section helpers
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*/
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#define NOSAVE_DATA \
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. = ALIGN(PAGE_SIZE); \
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VMLINUX_SYMBOL(__nosave_begin) = .; \
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*(.data..nosave) \
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. = ALIGN(PAGE_SIZE); \
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VMLINUX_SYMBOL(__nosave_end) = .;
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#define PAGE_ALIGNED_DATA(page_align) \
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. = ALIGN(page_align); \
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*(.data..page_aligned)
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#define READ_MOSTLY_DATA(align) \
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. = ALIGN(align); \
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*(.data..read_mostly) \
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. = ALIGN(align);
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#define CACHELINE_ALIGNED_DATA(align) \
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. = ALIGN(align); \
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*(.data..cacheline_aligned)
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#define INIT_TASK_DATA(align) \
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. = ALIGN(align); \
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*(.data..init_task)
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/*
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* Read only Data
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*/
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#define RO_DATA_SECTION(align) \
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. = ALIGN((align)); \
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.rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \
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VMLINUX_SYMBOL(__start_rodata) = .; \
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*(.rodata) *(.rodata.*) \
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*(__vermagic) /* Kernel version magic */ \
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. = ALIGN(8); \
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VMLINUX_SYMBOL(__start___tracepoints_ptrs) = .; \
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*(__tracepoints_ptrs) /* Tracepoints: pointer array */\
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VMLINUX_SYMBOL(__stop___tracepoints_ptrs) = .; \
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*(__tracepoints_strings)/* Tracepoints: strings */ \
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} \
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\
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.rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \
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*(.rodata1) \
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} \
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\
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BUG_TABLE \
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\
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/* PCI quirks */ \
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.pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \
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VMLINUX_SYMBOL(__start_pci_fixups_early) = .; \
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*(.pci_fixup_early) \
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VMLINUX_SYMBOL(__end_pci_fixups_early) = .; \
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VMLINUX_SYMBOL(__start_pci_fixups_header) = .; \
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*(.pci_fixup_header) \
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VMLINUX_SYMBOL(__end_pci_fixups_header) = .; \
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VMLINUX_SYMBOL(__start_pci_fixups_final) = .; \
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*(.pci_fixup_final) \
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VMLINUX_SYMBOL(__end_pci_fixups_final) = .; \
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VMLINUX_SYMBOL(__start_pci_fixups_enable) = .; \
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*(.pci_fixup_enable) \
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VMLINUX_SYMBOL(__end_pci_fixups_enable) = .; \
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VMLINUX_SYMBOL(__start_pci_fixups_resume) = .; \
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*(.pci_fixup_resume) \
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VMLINUX_SYMBOL(__end_pci_fixups_resume) = .; \
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VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .; \
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*(.pci_fixup_resume_early) \
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VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .; \
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VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .; \
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*(.pci_fixup_suspend) \
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VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .; \
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} \
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\
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/* Built-in firmware blobs */ \
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.builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \
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VMLINUX_SYMBOL(__start_builtin_fw) = .; \
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*(.builtin_fw) \
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VMLINUX_SYMBOL(__end_builtin_fw) = .; \
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} \
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\
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/* RapidIO route ops */ \
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.rio_ops : AT(ADDR(.rio_ops) - LOAD_OFFSET) { \
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VMLINUX_SYMBOL(__start_rio_switch_ops) = .; \
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*(.rio_switch_ops) \
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VMLINUX_SYMBOL(__end_rio_switch_ops) = .; \
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} \
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\
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TRACEDATA \
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\
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/* Kernel symbol table: Normal symbols */ \
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__ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \
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VMLINUX_SYMBOL(__start___ksymtab) = .; \
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*(SORT(___ksymtab+*)) \
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VMLINUX_SYMBOL(__stop___ksymtab) = .; \
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} \
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\
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/* Kernel symbol table: GPL-only symbols */ \
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__ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \
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VMLINUX_SYMBOL(__start___ksymtab_gpl) = .; \
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*(SORT(___ksymtab_gpl+*)) \
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VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .; \
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} \
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\
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/* Kernel symbol table: Normal unused symbols */ \
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__ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \
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VMLINUX_SYMBOL(__start___ksymtab_unused) = .; \
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*(SORT(___ksymtab_unused+*)) \
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VMLINUX_SYMBOL(__stop___ksymtab_unused) = .; \
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} \
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\
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/* Kernel symbol table: GPL-only unused symbols */ \
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__ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \
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VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .; \
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*(SORT(___ksymtab_unused_gpl+*)) \
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VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .; \
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} \
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\
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/* Kernel symbol table: GPL-future-only symbols */ \
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__ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \
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VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .; \
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*(SORT(___ksymtab_gpl_future+*)) \
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VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .; \
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} \
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\
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/* Kernel symbol table: Normal symbols */ \
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__kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \
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VMLINUX_SYMBOL(__start___kcrctab) = .; \
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*(SORT(___kcrctab+*)) \
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VMLINUX_SYMBOL(__stop___kcrctab) = .; \
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} \
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\
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/* Kernel symbol table: GPL-only symbols */ \
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__kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \
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VMLINUX_SYMBOL(__start___kcrctab_gpl) = .; \
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*(SORT(___kcrctab_gpl+*)) \
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VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .; \
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} \
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\
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/* Kernel symbol table: Normal unused symbols */ \
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__kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \
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VMLINUX_SYMBOL(__start___kcrctab_unused) = .; \
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*(SORT(___kcrctab_unused+*)) \
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VMLINUX_SYMBOL(__stop___kcrctab_unused) = .; \
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} \
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\
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/* Kernel symbol table: GPL-only unused symbols */ \
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__kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \
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VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .; \
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*(SORT(___kcrctab_unused_gpl+*)) \
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VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .; \
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} \
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\
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/* Kernel symbol table: GPL-future-only symbols */ \
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__kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \
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VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .; \
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*(SORT(___kcrctab_gpl_future+*)) \
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VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .; \
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} \
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\
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/* Kernel symbol table: strings */ \
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__ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
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*(__ksymtab_strings) \
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} \
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\
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/* __*init sections */ \
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__init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \
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*(.ref.rodata) \
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DEV_KEEP(init.rodata) \
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DEV_KEEP(exit.rodata) \
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CPU_KEEP(init.rodata) \
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CPU_KEEP(exit.rodata) \
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MEM_KEEP(init.rodata) \
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MEM_KEEP(exit.rodata) \
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} \
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\
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/* Built-in module parameters. */ \
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__param : AT(ADDR(__param) - LOAD_OFFSET) { \
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VMLINUX_SYMBOL(__start___param) = .; \
|
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*(__param) \
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VMLINUX_SYMBOL(__stop___param) = .; \
|
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} \
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|
\
|
|
/* Built-in module versions. */ \
|
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__modver : AT(ADDR(__modver) - LOAD_OFFSET) { \
|
|
VMLINUX_SYMBOL(__start___modver) = .; \
|
|
*(__modver) \
|
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VMLINUX_SYMBOL(__stop___modver) = .; \
|
|
. = 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)
|
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#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) = .;
|
|
|
|
#define ENTRY_TEXT \
|
|
ALIGN_FUNCTION(); \
|
|
VMLINUX_SYMBOL(__entry_text_start) = .; \
|
|
*(.entry.text) \
|
|
VMLINUX_SYMBOL(__entry_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 : AT(ADDR(.data..init_task) - LOAD_OFFSET) { \
|
|
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() \
|
|
MCOUNT_REC() \
|
|
*(.init.rodata) \
|
|
FTRACE_EVENTS() \
|
|
TRACE_SYSCALLS() \
|
|
DEV_DISCARD(init.rodata) \
|
|
CPU_DISCARD(init.rodata) \
|
|
MEM_DISCARD(init.rodata) \
|
|
KERNEL_DTB()
|
|
|
|
#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) \
|
|
}
|
|
|
|
/*
|
|
* Allow archectures to redefine BSS_FIRST_SECTIONS to add extra
|
|
* sections to the front of bss.
|
|
*/
|
|
#ifndef BSS_FIRST_SECTIONS
|
|
#define BSS_FIRST_SECTIONS
|
|
#endif
|
|
|
|
#define BSS(bss_align) \
|
|
. = ALIGN(bss_align); \
|
|
.bss : AT(ADDR(.bss) - LOAD_OFFSET) { \
|
|
BSS_FIRST_SECTIONS \
|
|
*(.bss..page_aligned) \
|
|
*(.dynbss) \
|
|
*(.bss) \
|
|
*(COMMON) \
|
|
}
|
|
|
|
/*
|
|
* DWARF debug sections.
|
|
* Symbols in the DWARF debugging sections are relative to
|
|
* the beginning of the section so we begin them at 0.
|
|
*/
|
|
#define DWARF_DEBUG \
|
|
/* DWARF 1 */ \
|
|
.debug 0 : { *(.debug) } \
|
|
.line 0 : { *(.line) } \
|
|
/* GNU DWARF 1 extensions */ \
|
|
.debug_srcinfo 0 : { *(.debug_srcinfo) } \
|
|
.debug_sfnames 0 : { *(.debug_sfnames) } \
|
|
/* DWARF 1.1 and DWARF 2 */ \
|
|
.debug_aranges 0 : { *(.debug_aranges) } \
|
|
.debug_pubnames 0 : { *(.debug_pubnames) } \
|
|
/* DWARF 2 */ \
|
|
.debug_info 0 : { *(.debug_info \
|
|
.gnu.linkonce.wi.*) } \
|
|
.debug_abbrev 0 : { *(.debug_abbrev) } \
|
|
.debug_line 0 : { *(.debug_line) } \
|
|
.debug_frame 0 : { *(.debug_frame) } \
|
|
.debug_str 0 : { *(.debug_str) } \
|
|
.debug_loc 0 : { *(.debug_loc) } \
|
|
.debug_macinfo 0 : { *(.debug_macinfo) } \
|
|
/* SGI/MIPS DWARF 2 extensions */ \
|
|
.debug_weaknames 0 : { *(.debug_weaknames) } \
|
|
.debug_funcnames 0 : { *(.debug_funcnames) } \
|
|
.debug_typenames 0 : { *(.debug_typenames) } \
|
|
.debug_varnames 0 : { *(.debug_varnames) } \
|
|
|
|
/* Stabs debugging sections. */
|
|
#define STABS_DEBUG \
|
|
.stab 0 : { *(.stab) } \
|
|
.stabstr 0 : { *(.stabstr) } \
|
|
.stab.excl 0 : { *(.stab.excl) } \
|
|
.stab.exclstr 0 : { *(.stab.exclstr) } \
|
|
.stab.index 0 : { *(.stab.index) } \
|
|
.stab.indexstr 0 : { *(.stab.indexstr) } \
|
|
.comment 0 : { *(.comment) }
|
|
|
|
#ifdef CONFIG_GENERIC_BUG
|
|
#define BUG_TABLE \
|
|
. = ALIGN(8); \
|
|
__bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \
|
|
VMLINUX_SYMBOL(__start___bug_table) = .; \
|
|
*(__bug_table) \
|
|
VMLINUX_SYMBOL(__stop___bug_table) = .; \
|
|
}
|
|
#else
|
|
#define BUG_TABLE
|
|
#endif
|
|
|
|
#ifdef CONFIG_PM_TRACE
|
|
#define TRACEDATA \
|
|
. = ALIGN(4); \
|
|
.tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \
|
|
VMLINUX_SYMBOL(__tracedata_start) = .; \
|
|
*(.tracedata) \
|
|
VMLINUX_SYMBOL(__tracedata_end) = .; \
|
|
}
|
|
#else
|
|
#define TRACEDATA
|
|
#endif
|
|
|
|
#define NOTES \
|
|
.notes : AT(ADDR(.notes) - LOAD_OFFSET) { \
|
|
VMLINUX_SYMBOL(__start_notes) = .; \
|
|
*(.note.*) \
|
|
VMLINUX_SYMBOL(__stop_notes) = .; \
|
|
}
|
|
|
|
#define INIT_SETUP(initsetup_align) \
|
|
. = ALIGN(initsetup_align); \
|
|
VMLINUX_SYMBOL(__setup_start) = .; \
|
|
*(.init.setup) \
|
|
VMLINUX_SYMBOL(__setup_end) = .;
|
|
|
|
#define INIT_CALLS_LEVEL(level) \
|
|
VMLINUX_SYMBOL(__initcall##level##_start) = .; \
|
|
*(.initcall##level##.init) \
|
|
*(.initcall##level##s.init) \
|
|
|
|
#define INIT_CALLS \
|
|
VMLINUX_SYMBOL(__initcall_start) = .; \
|
|
*(.initcallearly.init) \
|
|
INIT_CALLS_LEVEL(0) \
|
|
INIT_CALLS_LEVEL(1) \
|
|
INIT_CALLS_LEVEL(2) \
|
|
INIT_CALLS_LEVEL(3) \
|
|
INIT_CALLS_LEVEL(4) \
|
|
INIT_CALLS_LEVEL(5) \
|
|
INIT_CALLS_LEVEL(rootfs) \
|
|
INIT_CALLS_LEVEL(6) \
|
|
INIT_CALLS_LEVEL(7) \
|
|
VMLINUX_SYMBOL(__initcall_end) = .;
|
|
|
|
#define CON_INITCALL \
|
|
VMLINUX_SYMBOL(__con_initcall_start) = .; \
|
|
*(.con_initcall.init) \
|
|
VMLINUX_SYMBOL(__con_initcall_end) = .;
|
|
|
|
#define SECURITY_INITCALL \
|
|
VMLINUX_SYMBOL(__security_initcall_start) = .; \
|
|
*(.security_initcall.init) \
|
|
VMLINUX_SYMBOL(__security_initcall_end) = .;
|
|
|
|
#ifdef CONFIG_BLK_DEV_INITRD
|
|
#define INIT_RAM_FS \
|
|
. = ALIGN(4); \
|
|
VMLINUX_SYMBOL(__initramfs_start) = .; \
|
|
*(.init.ramfs) \
|
|
. = ALIGN(8); \
|
|
*(.init.ramfs.info)
|
|
#else
|
|
#define INIT_RAM_FS
|
|
#endif
|
|
|
|
/*
|
|
* Default discarded sections.
|
|
*
|
|
* Some archs want to discard exit text/data at runtime rather than
|
|
* link time due to cross-section references such as alt instructions,
|
|
* bug table, eh_frame, etc. DISCARDS must be the last of output
|
|
* section definitions so that such archs put those in earlier section
|
|
* definitions.
|
|
*/
|
|
#define DISCARDS \
|
|
/DISCARD/ : { \
|
|
EXIT_TEXT \
|
|
EXIT_DATA \
|
|
EXIT_CALL \
|
|
*(.discard) \
|
|
*(.discard.*) \
|
|
}
|
|
|
|
/**
|
|
* PERCPU_INPUT - the percpu input sections
|
|
* @cacheline: cacheline size
|
|
*
|
|
* The core percpu section names and core symbols which do not rely
|
|
* directly upon load addresses.
|
|
*
|
|
* @cacheline is used to align subsections to avoid false cacheline
|
|
* sharing between subsections for different purposes.
|
|
*/
|
|
#define PERCPU_INPUT(cacheline) \
|
|
VMLINUX_SYMBOL(__per_cpu_start) = .; \
|
|
*(.data..percpu..first) \
|
|
. = ALIGN(PAGE_SIZE); \
|
|
*(.data..percpu..page_aligned) \
|
|
. = ALIGN(cacheline); \
|
|
*(.data..percpu..readmostly) \
|
|
. = ALIGN(cacheline); \
|
|
*(.data..percpu) \
|
|
*(.data..percpu..shared_aligned) \
|
|
VMLINUX_SYMBOL(__per_cpu_end) = .;
|
|
|
|
/**
|
|
* PERCPU_VADDR - define output section for percpu area
|
|
* @cacheline: cacheline size
|
|
* @vaddr: explicit base address (optional)
|
|
* @phdr: destination PHDR (optional)
|
|
*
|
|
* Macro which expands to output section for percpu area.
|
|
*
|
|
* @cacheline is used to align subsections to avoid false cacheline
|
|
* sharing between subsections for different purposes.
|
|
*
|
|
* If @vaddr is not blank, it specifies explicit base address and all
|
|
* percpu symbols will be offset from the given address. If blank,
|
|
* @vaddr always equals @laddr + LOAD_OFFSET.
|
|
*
|
|
* @phdr defines the output PHDR to use if not blank. Be warned that
|
|
* output PHDR is sticky. If @phdr is specified, the next output
|
|
* section in the linker script will go there too. @phdr should have
|
|
* a leading colon.
|
|
*
|
|
* Note that this macros defines __per_cpu_load as an absolute symbol.
|
|
* If there is no need to put the percpu section at a predetermined
|
|
* address, use PERCPU_SECTION.
|
|
*/
|
|
#define PERCPU_VADDR(cacheline, vaddr, phdr) \
|
|
VMLINUX_SYMBOL(__per_cpu_load) = .; \
|
|
.data..percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load) \
|
|
- LOAD_OFFSET) { \
|
|
PERCPU_INPUT(cacheline) \
|
|
} phdr \
|
|
. = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data..percpu);
|
|
|
|
/**
|
|
* PERCPU_SECTION - define output section for percpu area, simple version
|
|
* @cacheline: cacheline size
|
|
*
|
|
* Align to PAGE_SIZE and outputs output section for percpu area. This
|
|
* macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and
|
|
* __per_cpu_start will be identical.
|
|
*
|
|
* This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,)
|
|
* except that __per_cpu_load is defined as a relative symbol against
|
|
* .data..percpu which is required for relocatable x86_32 configuration.
|
|
*/
|
|
#define PERCPU_SECTION(cacheline) \
|
|
. = ALIGN(PAGE_SIZE); \
|
|
.data..percpu : AT(ADDR(.data..percpu) - LOAD_OFFSET) { \
|
|
VMLINUX_SYMBOL(__per_cpu_load) = .; \
|
|
PERCPU_INPUT(cacheline) \
|
|
}
|
|
|
|
|
|
/*
|
|
* Definition of the high level *_SECTION macros
|
|
* They will fit only a subset of the architectures
|
|
*/
|
|
|
|
|
|
/*
|
|
* Writeable data.
|
|
* All sections are combined in a single .data section.
|
|
* The sections following CONSTRUCTORS are arranged so their
|
|
* typical alignment matches.
|
|
* A cacheline is typical/always less than a PAGE_SIZE so
|
|
* the sections that has this restriction (or similar)
|
|
* is located before the ones requiring PAGE_SIZE alignment.
|
|
* NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which
|
|
* matches the requirement of PAGE_ALIGNED_DATA.
|
|
*
|
|
* use 0 as page_align if page_aligned data is not used */
|
|
#define RW_DATA_SECTION(cacheline, pagealigned, inittask) \
|
|
. = ALIGN(PAGE_SIZE); \
|
|
.data : AT(ADDR(.data) - LOAD_OFFSET) { \
|
|
INIT_TASK_DATA(inittask) \
|
|
NOSAVE_DATA \
|
|
PAGE_ALIGNED_DATA(pagealigned) \
|
|
CACHELINE_ALIGNED_DATA(cacheline) \
|
|
READ_MOSTLY_DATA(cacheline) \
|
|
DATA_DATA \
|
|
CONSTRUCTORS \
|
|
}
|
|
|
|
#define INIT_TEXT_SECTION(inittext_align) \
|
|
. = ALIGN(inittext_align); \
|
|
.init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \
|
|
VMLINUX_SYMBOL(_sinittext) = .; \
|
|
INIT_TEXT \
|
|
VMLINUX_SYMBOL(_einittext) = .; \
|
|
}
|
|
|
|
#define INIT_DATA_SECTION(initsetup_align) \
|
|
.init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \
|
|
INIT_DATA \
|
|
INIT_SETUP(initsetup_align) \
|
|
INIT_CALLS \
|
|
CON_INITCALL \
|
|
SECURITY_INITCALL \
|
|
INIT_RAM_FS \
|
|
}
|
|
|
|
#define BSS_SECTION(sbss_align, bss_align, stop_align) \
|
|
. = ALIGN(sbss_align); \
|
|
VMLINUX_SYMBOL(__bss_start) = .; \
|
|
SBSS(sbss_align) \
|
|
BSS(bss_align) \
|
|
. = ALIGN(stop_align); \
|
|
VMLINUX_SYMBOL(__bss_stop) = .;
|