位置：asm-generic/vmlinux.lds.h
/*
* 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
