cregit-Linux how code gets into the kernel

Release 4.7 include/asm-generic/sections.h

#ifndef _ASM_GENERIC_SECTIONS_H_

#define _ASM_GENERIC_SECTIONS_H_

/* References to section boundaries */

#include <linux/compiler.h>
#include <linux/types.h>

/*
 * Usage guidelines:
 * _text, _data: architecture specific, don't use them in arch-independent code
 * [_stext, _etext]: contains .text.* sections, may also contain .rodata.*
 *                   and/or .init.* sections
 * [_sdata, _edata]: contains .data.* sections, may also contain .rodata.*
 *                   and/or .init.* sections.
 * [__start_rodata, __end_rodata]: contains .rodata.* sections
 * [__init_begin, __init_end]: contains .init.* sections, but .init.text.*
 *                   may be out of this range on some architectures.
 * [_sinittext, _einittext]: contains .init.text.* sections
 * [__bss_start, __bss_stop]: contains BSS sections
 *
 * Following global variables are optional and may be unavailable on some
 * architectures and/or kernel configurations.
 *      _text, _data
 *      __kprobes_text_start, __kprobes_text_end
 *      __entry_text_start, __entry_text_end
 *      __ctors_start, __ctors_end
 */
extern char _text[], _stext[], _etext[];
extern char _data[], _sdata[], _edata[];
extern char __bss_start[], __bss_stop[];
extern char __init_begin[], __init_end[];
extern char _sinittext[], _einittext[];
extern char _end[];
extern char __per_cpu_load[], __per_cpu_start[], __per_cpu_end[];
extern char __kprobes_text_start[], __kprobes_text_end[];
extern char __entry_text_start[], __entry_text_end[];
extern char __start_rodata[], __end_rodata[];

/* Start and end of .ctors section - used for constructor calls. */
extern char __ctors_start[], __ctors_end[];

extern __visible const void __nosave_begin, __nosave_end;

/* function descriptor handling (if any).  Override
 * in asm/sections.h */
#ifndef dereference_function_descriptor

#define dereference_function_descriptor(p) (p)
#endif

/* random extra sections (if any).  Override
 * in asm/sections.h */
#ifndef arch_is_kernel_text

static inline int arch_is_kernel_text(unsigned long addr) { return 0; }

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#endif #ifndef arch_is_kernel_data
static inline int arch_is_kernel_data(unsigned long addr) { return 0; }

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#endif /** * memory_contains - checks if an object is contained within a memory region * @begin: virtual address of the beginning of the memory region * @end: virtual address of the end of the memory region * @virt: virtual address of the memory object * @size: size of the memory object * * Returns: true if the object specified by @virt and @size is entirely * contained within the memory region defined by @begin and @end, false * otherwise. */
static inline bool memory_contains(void *begin, void *end, void *virt, size_t size) { return virt >= begin && virt + size <= end; }

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/** * memory_intersects - checks if the region occupied by an object intersects * with another memory region * @begin: virtual address of the beginning of the memory regien * @end: virtual address of the end of the memory region * @virt: virtual address of the memory object * @size: size of the memory object * * Returns: true if an object's memory region, specified by @virt and @size, * intersects with the region specified by @begin and @end, false otherwise. */
static inline bool memory_intersects(void *begin, void *end, void *virt, size_t size) { void *vend = virt + size; return (virt >= begin && virt < end) || (vend >= begin && vend < end); }

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/** * init_section_contains - checks if an object is contained within the init * section * @virt: virtual address of the memory object * @size: size of the memory object * * Returns: true if the object specified by @virt and @size is entirely * contained within the init section, false otherwise. */
static inline bool init_section_contains(void *virt, size_t size) { return memory_contains(__init_begin, __init_end, virt, size); }

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/** * init_section_intersects - checks if the region occupied by an object * intersects with the init section * @virt: virtual address of the memory object * @size: size of the memory object * * Returns: true if an object's memory region, specified by @virt and @size, * intersects with the init section, false otherwise. */
static inline bool init_section_intersects(void *virt, size_t size) { return memory_intersects(__init_begin, __init_end, virt, size); }

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#endif /* _ASM_GENERIC_SECTIONS_H_ */

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thierry redingthierry reding14345.83%16.25%
mike frysingermike frysinger3912.50%16.25%
dan alonidan aloni3210.26%16.25%
rusty russellrusty russell216.73%16.25%
james bottomleyjames bottomley134.17%16.25%
geert uytterhoevengeert uytterhoeven113.53%16.25%
andi kleenandi kleen103.21%212.50%
peter oberparleiterpeter oberparleiter92.88%16.25%
jiri olsajiri olsa82.56%16.25%
prasanna s panchamukhiprasanna s panchamukhi82.56%16.25%
heiko carstensheiko carstens61.92%16.25%
david howellsdavid howells51.60%16.25%
tejun heotejun heo30.96%16.25%
andrew mortonandrew morton30.96%16.25%
jiang liujiang liu10.32%16.25%
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