LXR linux/include/asm-generic/sections.h

   1#ifndef _ASM_GENERIC_SECTIONS_H_
   2#define _ASM_GENERIC_SECTIONS_H_
   3
   4/* References to section boundaries */
   5
   6/*
   7 * Usage guidelines:
   8 * _text, _data: architecture specific, don't use them in arch-independent code
   9 * [_stext, _etext]: contains .text.* sections, may also contain .rodata.*
  10 *                   and/or .init.* sections
  11 * [_sdata, _edata]: contains .data.* sections, may also contain .rodata.*
  12 *                   and/or .init.* sections.
  13 * [__start_rodata, __end_rodata]: contains .rodata.* sections
  14 * [__init_begin, __init_end]: contains .init.* sections, but .init.text.*
  15 *                   may be out of this range on some architectures.
  16 * [_sinittext, _einittext]: contains .init.text.* sections
  17 * [__bss_start, __bss_stop]: contains BSS sections
  18 *
  19 * Following global variables are optional and may be unavailable on some
  20 * architectures and/or kernel configurations.
  21 *      _text, _data
  22 *      __kprobes_text_start, __kprobes_text_end
  23 *      __entry_text_start, __entry_text_end
  24 *      __ctors_start, __ctors_end
  25 */
  26extern char _text[], _stext[], _etext[];
  27extern char _data[], _sdata[], _edata[];
  28extern char __bss_start[], __bss_stop[];
  29extern char __init_begin[], __init_end[];
  30extern char _sinittext[], _einittext[];
  31extern char _end[];
  32extern char __per_cpu_load[], __per_cpu_start[], __per_cpu_end[];
  33extern char __kprobes_text_start[], __kprobes_text_end[];
  34extern char __entry_text_start[], __entry_text_end[];
  35extern char __start_rodata[], __end_rodata[];
  36
  37/* Start and end of .ctors section - used for constructor calls. */
  38extern char __ctors_start[], __ctors_end[];
  39
  40/* function descriptor handling (if any).  Override
  41 * in asm/sections.h */
  42#ifndef dereference_function_descriptor
  43#define dereference_function_descriptor(p) (p)
  44#endif
  45
  46/* random extra sections (if any).  Override
  47 * in asm/sections.h */
  48#ifndef arch_is_kernel_text
  49static inline int arch_is_kernel_text(unsigned long addr)
  50{
  51        return 0;
  52}
  53#endif
  54
  55#ifndef arch_is_kernel_data
  56static inline int arch_is_kernel_data(unsigned long addr)
  57{
  58        return 0;
  59}
  60#endif
  61
  62#endif /* _ASM_GENERIC_SECTIONS_H_ */
  63